eagle engineering aerospace

Transcription

EAGLE ENGINEERING AEROSPACE
BREAKTHROUGH
Towards Aviation and Aerospace Engineering
EEA, formerly Eagle EG&G Aerospace, was founded in 1988 as a joint venture
between the U.S. high-tech conglomerate EG&G and Eagle Industry Co., Ltd.
(the core company of the NOK group, a Japanese pioneer in seal engineering).
Eagle Industry acquired 100% equity in EEA in 1999 to control business expansions. In 2000, the company name was changed to Eagle Engineering Aerospace Co., LTD.
EEA has achieved good results in a wide variety of design, manufacture, engineering, procurement, and technical information services related to aerospace
machinery and components. Aerospace engineering involves massive consideration in areas of high pressures, high temperature and cryogenic, vacuums, and
high-speed rotation, bundled with reliability diagnostics. With methods of testing
and evaluation reaching higher levels, greater reliability and complexity in this
field is demanded. Also, because energy conservation and cost reduction are on
a global scale, aerospace technology is becoming more diverse and complex.
EEA is aiming to be at the leading edge of this era by compiling technology and
engineering knowledge, expanding parts supply, and building a global engineering information network.
ETS-*
E&EAerospace
EAGLE ENGINEERING AEROSPACE CO.,LTD.
1966 Developed J47 Jet Engine Gearbox seal (Eagle Industry)
1974 Developed LH2 & LOX Turbopump seal for domestic Rocket H-I (Eagle Industry)
1988 Eagle Industry acquired all 100% share of EEA
2000 Company name was changed to Eagle Engineering Aerospace
COMPANY
EAGLE ENGINNRING AEROSPACE CO.,LTD.(EEA)
HEAD OFFICE
12-5,Shiba-daimon 1-chome, Minato-ku, Tokyo 105-8587 Japan
SAITAMA WORKS
1500 Katayanagi, Sakado, Saitama 350-0285 Japan
LOCAL OFFICE
AEROSPACE RESEARCH & TRADING, INC.
1731 Technology Drive, Suite 840, San Jose, CA 95110-1370 U.S.A.
EAGLE ENGINEERING AEROSPACE SINGAPORE PTE. LTD.
52 Serangoon North Avenue4 #03-02, Ever Tech Bldg., Singapore 555853
EAGLE ENGINEERING AEROSPACE KOREA CO.,LTD.
4B 5L Chilseo Industrial Complex Chilseo-Myun, Haman-Gun, Gyeong-Nam, Korea
EAGLE ENGINEERING AEROSPACE TAIWAN CO.,LTD.
No.7, Lane 144, Chi Lin Road, Taipei, Taiwan, R.O.C.
SERVICE NETWORK
JAPAN
SINGAPORE
KOREA-GYEONG
TAIWAN-TAIPEI
USA-SAN JOSE
CONTENTS
Outline of EEA.......1
Concept.....Skill & Insight.......2
History & Visions.......4
Technology Fields.......8
Products.......9
Applications.....22
Network.....23
Copyright 2004 The EAGLE ENGINEERING AEROSPACE - All rights reserved.
1
SKILL & INSIGHT
Technologies Analytic Service for Aircraft & Space
J-1
SKILLS & INSIGHT
With its technical experience, EEA is proud of its ability to provide
engineering "SKILLS" in the areas of software and hardware. Although seal engineering and friction control technology are still the
core of EEA, it is this engineering base that allows us to foresee and
solve development and operational themes. Our knowledge also
enables us to organize and manage collaborative projects while
taking into account environmental, social and economic requirements. As technical specialists we set our sights on the vision of the
next generation. We developed this image from "INSIGHT" gained
through technical analysis.Thus, our main engineering concept is
called "Technologies-Analytic Service for Aircraft & Space ".EEA, as
a group of Tech-Analysts, is aimed to be a "Theme Identifier", a
"Problem Solver", and a "Strategic Coordinator" in the development
and operation of aviation and space equipment.
The Solution Process we use is as follows:
1. Brainstorming: In focusing on the problem we have identified,
we integrate information while reviewing various data, thus finding new directions and options for the solution.
2. System Thinking: Based on the selected approach, we look at
the problem from every angle in order to bring to light the interrelationships between all the factors. Thus, systematically, we
discern the central problem and the relationship between it and
other factors.
3. Experimentation: From a detailed estimate, we pursue a suitable
solution through precise experimentation.
4. Project Management: We consider each individual task with
future integration in mind, and thus develop a mutually profitable
means for managing the program.
As the global economy came into being, the world has shifted to a
more open marketplace, and this has brought a wave of deregulation that has rippled through the aerospace industry. We are entering into an era of borderless competition and of global standards.
A new framework for the aerospace industry is emerging whereby
we must go beyond the search for a prosperous human society and
the development of the economy to conserve resources, save energy and preserve the earth by reducing CO2 emission and other
means.Through Tech-Analytic Service, EEA will break through whatever future developments or restrictions may surface in the business frontiers.
Copyrigt 2000 The EAGLE ENGINEERING AEROSPACE - All rights reserved.
2
SIGHTS SET ON THE NEXT GENERATION - Envisioning the Future
EEA began with major components like dynamic seals, static seals, welded bellow valves in fluid sealing and friction
control technology, but has since expanded into a wide range of aerospace design and manufacturing fields such as
turbine engines, gearboxes, duct systems, pneumatic systems and fuel systems. EEA has also expanded into space
development areas such as rocket engines, turbopumps, satellites, space station equipment, and indeed, the rockets
themselves.Through cooperation with NASDA, Japan Aviation Engine Association, and advanced projects in R&D, EEA
has won high appreciation for its technology and engineering in structural analysis and design, and high-accuracy,
high-precision processes.
KEY
1
Theme Identify
Abstraction
System Thinking
KEY
2
Concurrent Designing
Experimentation
Collaboration
KEY
3
Strategic Coordination
3
DRTS-W.E
HISTORY&VISIONS
1966: Started with the J47 Engine gearbox seals
Licensed for production of jet fighter aircraft and engine
maintenance, the company pursued the limits of performance which drove the introduction of leading edge materials, processes, mechanism design and the latest in technology.Eagle Industry, parent company of EEA, had developed
the gearbox seals for the J47 engine used for F86 in 1966. It
also developed a wide variety of aircraft products such as
mainshaft seals for the T58, T64, TJ79, JT8D, FJR710, F100
and aircraft seals, valves, ducts for the KV107, C-1, F4-EJ,
ASUKA
YS-11, F104J, F-15J and P-3C.
To build on the achievements of Eagle Industry, EEA came
into being as a member of the EG&G Fluid Components
Technology Group, a group that is proud of its worldwide
achievements in the aerospace industry.
Since then, EEA has been establishing a reputation as a
group of engineering specialists, dedicated to the domestic
aircraft industry as well, through participation in projects like
the V2500 engine.In the satellite business field, we started
with the pump seals for liquid fuel rockets in 1967, contributing to all N and H type rocket projects.
EEA is also a manufacturer of the main functional devices
for earth observation satellites and the JEM project, part of
the International Space Station project.With this rich technical background, EEA will continue to actively promote R&D
and the global network for technical information and materials procurement. EEA is, and will remain, at the tip of aerospace engineering, driven by the demand for higher efficiency,
higher
reliability,
better
harmony
with
the
environment, lower energy use and greater cost efficiency.
4
HISTORY & VISIONS
lgor Sikorsky, Gooddard, Albert Read,Von Brawn, People who realized their drems.
On oct 4th ,1957 Sputnik 1, was the first craft to reach exit speed.
On April 12th, 1961 Yurij Alekseevich Gagarin,orbited the earth.
In 1930, England Frank Whittle patented the jet engine.
On the 27th of July 1947, at London Hartford,
the first non-propwller passenger plane took of.
Copyrigt 2000
The EAGLE
ENGINEERING
AEROSPACE All rights reserved.
5
HISTORY & VISIONS
6
HISTORY & VISIONS
7
TECHNOLOGY
FIELDS
Fundamental technology, Elemental technology,
and the expansion of Applied technology
On aircraft engines, the technology has moved from turbojets
to the fuel economical turbofans, and high-bypass engines.
From there, the technology has progressed to lightweight and
high-bypass rates by using composite material.
Corresponding market needs influence technical fields like in
the acceleration of digital control technology in fuel system
and pneumatic systems. Various innovations are accelerated
by a single technical improvement.
Aviation and space equipment gives shape to various
applications by condensing fundamental technologies like
mechanical design, structural-design analysis, material
design, electronics-based process design, sealing / friction
control, high-accuracy / high-precision / lightweight test
evaluation, reliability analysis, and quality assurance.
With superior experience in designing and manufacturing
main-shaft seals, EEA established adaptable technical fields
in engine surrounding, accessory, pneumatic / fuel system,
duct, accessory etc.
Even in space development, from fundamental research
stage of domestic rockets, EEA supplies challenging
engineering, related to special environmental limits like
cryogenic, high-temperature, vacuum, high-pressure, etc.
Thanks to the breadth and depth of its technical knowledge,
EEA is also working as a member of Research Institute of
Advanced Material Gas Generator (AMG), to accomplish
environmental adaptation in fuel economy, lightweight and
low-NOx. Plus, as a developer and manufacturer of important
functional parts, we are dedicated to pioneering space
projects like JEM.
TECHNOLOGY AND
PRODUCTION for
AEROSPACE
APPLICATIONS
CRYOGENICS
VACUUM
Core
HI-,
TEMPERATURE
PRESSURE
SPEED
MATERIALS
CARBON
CERAMIC
COATING
SUPER ALLOY
Kakehashi
Technology's
STRUCTURAL
ENGINEERING
SEAL
TRIBOLOGY'S
8
AERO ENGINE APPLICATIONS
MECHANICAL FACE TYPE SEALS
Good sealing performance comparing with labyrinth type seal
DUCTING SYSTEMS
High performance dependable proven products.
MAINSHAFT
CIRCUMFERENTIAL SEGMENTED SEALS
Seals are comprised of a set of segmented
carbon rings which contact the shaft to form a
circumferenetial dynamic seals and reduce
heat generation and wear and to optimize dynamic response.
WELDED BELLOWS FACE TYPE SEALS
This type is a stationary ,"face" type seal with
an all metallic construction. Originally designed
for extreme environmental applications, this
series seal has found its way into a wide array
of applications.
O-RING SEALED FACE TYPE SEALS
Because of it's small design configuration, this
type is widely used for gear box seals for jet
engines, main shaft seals for small gas turbine
engines and for fuel pumps.
CLEARANCE SEALS
Clearance seals provide dependable shaft
sealing where high speeds, temperatures or
lack of lubrication prohibit the use of conventional face-type seals.
BRUSH SEALS
The severe operating conditions encountered
in today's gas turbine engines and increased
environmental concerns have created a need
for an alternative to labyrinth seals. Brush seals
can offer much reduction in specific fuel consumption over labyrinth seals.
METALLIC FILTERS
Widely used for fuel line systems to prevent
penetration of foreign materials inside the fuel
line.
STATIC METAL SEALS
Flexible metallic seals suitable for applications
with cyclic axial deflection and high temperature.
Good springback and reusability characteristics.
METAL BELLOWS
Widely used as sensing elements for both
pressure and temperature measurements.
Suitable characteristics for it's volumetric
change absorption with no leakage.
HOT SECTION
VALVES
Control valves and check valves are used for
both fuel and hydraulic systems.
DUCTING SYSTEMS
It is used for the distributing of the warm air introduced from engine to a passenger room.
They include turbine engine bleed air and cooling ducting, engine exhaust ducting.
It is predominant to combine unparalleled experities
with innovative engineering techniques in the design of Hi-temperature, Hi-pressure and Hi-speed in
a jet engine application. Our broad experience and
deep understanding of this application formed the
foundation of our value-engineering approach.
ACCESSORIES
GEARBOX
RIGID JOINTS
Provide reliable connection for ease of installation/removal of ducts and attached equipment.
Snap fit, replaceable metal seal for low leakage
and ease of installation
TUBE SEALS
Designed for axial, angular, and rotational motion; double ended designs provide lateral offset capability. Controlled bending moment to
enable ducting design optimization.
9
LAUNCH VEHICLES &
SPACE STATION
ROCKET ENGINE
SATELLITE
Our mission of developing,
advancing and protecting
technical excellence in space
applications.
EEA had participated in the development project from
the stage of the basic research which begins in Japan
and began to develop a domestic rocket.
The theme of the development research with which we
were mainly concerned was development of the seal
which functions under the special environment like cryogenic temperature, high pressure, or a high vacuum.
And since the remarkable good result was obtained in
this field, EEA has participated also in the development
project of present H rocket project as a development
manufacturer of important parts.
The rocket projects in which we participated are the turbine pump seal used for LE-5 or LE-7 engine, fluid control apparatus, and the seal system of a fuel systems.
SPACE STATION
FUEL TANK
CIRCUMFERENTIAL SEGMENTED SEALS
It is used for the turbine pump of a liquid
oxygen and a liquid-hydrogen rocket engine, and is used as a seal of high temperature gas and helium gas.
STATIC SEALS
In cryogenic temperature, high temperature,
and high-pressure environment, it is used as a
seal of the piping system,or a vessel. And, in
the space environment, it is used as a seal of
manhole, for a chamber and afuel tank.
WELDED METAL BELLOWS
It is welded metal bellows type mechanical
seal for fuel line of the rocket engine. It could
prevent leakage at very low temperature.
METAL BELLOWS
It is used in order to absorb the expansion of
volumetric change or displacement compensation of piping system caused by temperature
change under the space environment.
CLEARANCE SEALS
A clearance seal is a gas seal for fuel of a
turbine pump, and is used on high temperature and high pressure condition.
METALLIC FILTERS
The unique etched disc filters is used for absolute rated filtration of gases and liquids aboard
satellites and spacecraft.
VALVES
Valve is used for control of the oil pressure
system of engine, control of gas, and control
of a gas jet.
TRANSITION TUBES
It is the tube which made from different metal
like titanium and a stainless using the special
jointing method. It is used for various apparatus
and the piping system of a satellite.
10
MAINSHAFT SEALS
MAINSHAFT SEALS
FACE TYPE
Although the labyrinth type seal has been
conventionally used for a mainshaft seal,
the face type with few amounts of gas leakage is in use today because of the improvement in an engine performance.
A face type seal normally remains stationary; it is secured in the housing by an interference fit. A rotating mating ring is mounted on the shaft.
A fixation side seal is a carbon seal which
used carbon graphite for the seal surface,
acquires load with a spring force and is integrated with the secondary seal which
used the metallic piston ring corresponding to high temperature conditions.
A mating ring is a part made from nickelchromium-molybdenum steel and the chromium carbide, excellent in the wear resistance under high temperature, is coated on
the seal surface. Besides, the small holes
which flush lubricating oil are prepared in
OILJET
MATING RING
PISTONRING SEAL
SEAL RING
the inside of a ring at the radial direction
for cooling of a seal surface. When lubricating conditions are especially bad, the
structure of leading lubricating oil is also
taken to a seal surface for cooling. On usual operating conditions, since a gas chamber side subject to high pressure, then the
design of a face type seal is adopted.
Face-seal arrangement for turbofan engine
11
In order to seal compressed air and high temperature
gas, and the lubricating oil, the main shaft seal of jet
engine is used in the very severe conditions under high
pressure or high temperature in the entrance and the
back exhaust part of a combustion chamber, In recent
years, responding to output power improvement, gas
pressure to be sealed is more and more increasing,
and the leakage from a seal part cannot be neglected
in high performance engines, because of causing such
as oxidization of lubricating oil, and a waste oil pump
size must be increased to respond to this trend.
In a main shaft seal application, EEA is the only one
company in Japan who has the results. In order to respond to a trend of higher performance of jet engines,
our structure design technology, which controls the
composition material technology and load of a seal
technology, is widely applied.
MAINSHAFT SEALS
SEGMENTED TYPE
OILJET
SEAL HOUSING
SEAL RING
SEAL RUNNER
The segmented type seals are comprised of
a set of segmented carbon rings, which are
held together by loads produced from the
garter springs, contact the shaft or runner to
form a circumferential dynamic seal.
The outer side of a main shaft and the internal surface of this segmented seal works as
seal surface.
The contact surface of seal housing and a
seal ring serves as a static secondary seal.
Many slots are provided in the internal surface of a seal ring, the pressure of the gas
by the high pressure is lead just before the
low-pressure boundary of a contact seal surface to minimize the area which is generating squeeze force in proportion to it's area.
According to this structure, the force of a
seal surface is as small as 0.5 kgf/cm2 and
could suppress heat generation.
A segmented seal can make the displacement allowance of the axial direction larger
than a face type seal.
And the cross section space which a seal
occupies can also be make smaller.
By this fact, even when especially bearing
size is big, the seal weight could be maintained light.
On the other hand, with the seal of the front
part main bearing of turbofan engine, that
seal load is especially small because of low
differential pressure, liable to cause oil leakage, particularly in the case when there is almost no air pressure. In the FJR710 engine
(experimental aircraft named "Aska"), a fine
helical grooves are slotted in the diameter of
the inside of segmented seal to draw leaking
oil back to lubrication room by function of
hydraulic suction.
Segmented-seal arrangment for turbojet engine
12
DYNAMIC SEALS
MECHANICAL SEALS
700SERIES
800SERIES
SPRING
SEAL RING
O-RING
The 700 series is the general term of the
mechanical seal for high-speed application
in which a O ring for the static seal is used.
Since the main part of a seal is a mating
ring and fixed on the rotating shaft, it is excellent in the high-speed application and
the dynamic balance like the 800 series.
There are a stamped housing type suitable
for high speed and low load rotation and a
machined housing type suitable for high
structural rigidity and heavy duty.
Both series are designed light in weight
and compact in size.
Especially a machined housing type is the
structure where pressure balance can be
adjusted in the large range, and can widely
set up the application pressure range.
As for a high-speed seal application, a
stamped housing type is widely used for
gearbox seal and is also used in many application, such as a main shaft of helicopter
engine, a fuel pump, an oil pressure pump,
and a fuel control systems.
STAMPED HOUSING SEAL
MATING RING
O-RING
SPRING
SEAL RING
The 800 series is the general term of the
mechanical seal which used the nesting type
(stacked type) metal welded bellows for the
stationary side and excels in the performance of the dynamic responsibility at highspeed and is applicable from cryogenic to
high temperature range.
In order to isolate the influence of an axial vibration of the bellows produced under highspeed rotation and to increase dynamic responsibility, a damper is attached to evade
resonance. If welding is applicable, it is possible to use any material for bellows.
Generally, deposit hardening stainless steel
(AM350) or Inconel 718, X750 are used for
bellows.
Corresponding to the trend of higher temperature requirement of a sealing contact portion, the material with high thermal stability is
required for a sealing material.
For this reason, the carbon graphite excellent in self-lubricity, heat resistance and corrosion resistance, and the heat shock resistance is used for a stationary-side seal ring.
It is used for the seals where the reduction of
mounting spaces is required.
DAMPER
MACHINED HOUSING SEAL
BELLOWS
Basic Operating Limits
Stamped Housing Seals
Differential Pressure : 25kgf/cm2 Max.
。
Temperatures : 230 C Max.
Speed : 100m/sec Max.
Machined Housing Seals
。
MATING RING
MATING RING
Carbon graphite is generally used for the
material of the seal ring of a static side, and
hardening steel, nitriding steel or hard material coated steal is used for the matingring.
Under the medium speed and a pressure
condition, it is possible to obtain a good lubricating condition by using oil spray configuration, while in the high speed and temperature condition, oil jet cooling toward mating
ring is used for cooling.
Compact seal arrangement for gearbox
SEAL RING
WELDED METAL BELLOWS SEAL
Examples are such as a main shaft of a
small gas turbine, various gearboxes, such
as helicopter engine, and the fuel turbopump of H rocket engines. They are featuring high performance under the high-speed
and severe condition.
。
。
Temperatures : _250 C Max.~430 C Max.
13
Although the practical speed limit of the mechanical seal for highspeed application is said to be about 100m/s, this limit is originated by
the dynamic responsibility, and heat generation level caused by friction.
Especially, under a high-speed condition, heat decomposition of the oil
occurs by temperature rise of a sealing contact portion, and damage a
surface or it deposits on a seal part, and also sealing contact portion
material exceeds a heat resistant limit, and a seal is worn out at an early stage.
For this reason, removal of heat generated by friction, such as installation of a cooling system, serves as the important device which influences a seal performance and a life.
In EEA, original research and development are conducted to these engineering subjects, and various dynamic seals, such as a metal welding bellows type, O ring seal type, a clearance seal, and a segmented
seal, and the marginal performance of a seal sealing material are studied.
SEGMENTED
SEALS
Since a segmented seal requires the pressure balance of a seal for the maximum, it
can suppress a heat generated by friction
low. However, when there are few differential pressure of gas and lubricating oil, or
when oil tends to penetrate into a seal part,
since seal load is small, oil leak may be
caused to a gas side. For this reason, it is
necessary to design the configuration of a
sealing contact portion so as lubricating oil
coming as little as possible. To solve this issue, attaching a runner for cooling itself
from inside, or in the event of cooling outside the runner, combination of oil jet and
slinger is used.
Besides, penetration of oil is prevented by
the combination of the slotted chopper on
the axis and with the spiral windback as
shown in a figure.
When a differential pressure is small, in order that oil may penetrate into an air side
caused by oil viscosity, pressurized air is
supplied with tandem type structure design, and oil leak is prevented.
。
Pressurized Air
WINDBACK
CLEARANCE
SEALS
MATING
SEALS
It is the seal of a non contact type and used
in order to mainly intercept a gas leakage for
the high-speed, the high pressure, and the
high temperature application which can't be
realized with using a face type seal. It is designed so that a minimum clearance could be
maintained between the carbon ring built into
housing, and a shaft, and a primary sealing is
held by this clearance and a secondary sealing is obtained by the contact surface between a carbon ring and the housing. Moreover, in order that a minute differential
pressure condition may also maintain a secondary sealing performance, the pressure
load of a contact surface is obtained by the
wave spring.
Because of a non contact type, there are very
few heat generation, clearance seal could
serve a long life term, and can suppress gas
leak about 1/10th comparing with a labyrinth
seal type.
Therefore, the improvement of engine efficiency, and miniaturizing the size and weight
reduction can be achieved with this configuration.
In the liquid-oxygen turbopump application
for rockets, it is used as a sealing of liquid
oxygen, and combustion hydrogen gas at the
oxygen pump part and the turbine part for a
drive. And high reliability has been acquired
with the seal characteristic under a high differential pressure condition, with the dynamic
responsibility to temperature change is improved.
。
。
Temperatures : -250 C ~ 650 C Max.
CHOPPER
RETAINER
WINDBACK TYPE SEAL
TANDEM TYPE SEAL
Usually, amating ring is located next to a
bearing and is being fixed on the shaft.
Since the seal for high-speed tends to subject high temperature generated by friction,
it is necessary to use a sealing material
within the range of a heat-resistant limit,
then the contact load to a seal side is designed to be the minimum level.
Although the roughness of a seal surface is
finished by 0.9 micrometers or less, when it
is actually used, distortion arises in a surface by various factors, and a leak may be
occurred. As a big factor of this leakage is
thought to be caused by distortion of the
surface where attaching a mating ring, and
the deflection of a surface itself.
Especially when the thickness of the axial
direction of a mating ring is small, and if a
waviness is existing on the fixing contact
surface, the distortion could be appeared
by the influence of this fixing force.
If the fixing force of the axial direction is
greatly biased, a moment will be appeared
and would act on a mating ring and distortion will be produced on the radial direction
in a seal surface.
Such distortion in many cases results in
leakage increasing. Then, installation accuracy greatly influences on a seal performance .
On the other hand, in order to cool a seal
effectively, a mating ring is playing a important roll. For that purpose, there are several methods as of enlarging cooling area,
a method of passing cooling oil inside a
mating ring, and the method of increasing
cooling efficiency using copper alloy for the
good thermal conductivity.
SEAL HOUSING
SEAL RING
SPRING
SPEED 20,000RPM
OILJET Locations
A
B
C
SEAL RUNNER
Cooling Oil
SEAL RUNNER
Temperature of seal ring, ℃
140
120
Cooling Oil
Cooling Oil
SLINGER
100
80
CBA
60
40
60.9
20
46.4
0.2 0.4 0.6
Cooling arrangement of segmented seals
1.0 Cooling rate of oil, l/min
Effect of lubricant locations on mating ring
14
SPECIAL DYNAMIC SEALS
ROCKET ENGINE BRUSH SEALS
TURBOPUMP SEALS ROTOR TYPE
EEA has been engaged from 1967 in development of the seal system of the mechanical
face seal for high-speed rotation pumps used
for domestic liquid fuel rocket engines.
This mechanical face seal is used under
cryogenic temperature, high temperature,
and high-speed environment.
EEA has obtained high evaluation as an important parts development manufacturer also
in subsequent N rocket project and H rocket
project.
LE-5 and the LE-7 engine, which were developed by domestic technology, are using liquid hydrogen and liquid oxygen for propulsion system.
EEA has performed development of the seal
system that intercepts the zone of the very
low temperature propulsion substance in the
turbine pump used for engine, and the high
temperature gas for a drive, design, and
manufacturing.
The increase in efficiency of a gas turbine
progressed and the demand that reduces the
rate of fuel consumption and NOx has increased to the 1990s.
Accordingly, the demand of the brush seal
used in order to decrease the leakage of the
air by the side of secondary seal, necessary
in order to raise the performance of a gas turbine, has increased.
EEA started development of the brush seal
for high temperature in 1991, and has been
engaged in a design for aircrafts, and an industrial gas turbine, and is manufacturing
brush seals as a special manufacturer.
A brush seal is a seal which consists of a
densely packed, fine nickel chromium alloy
wires which prevents leakage and is a new
seal which substitutes the labyrinth seal used
so far.
BRISTLE
RUBBING
SEAL FACE
The wire arrayed on a 45-degree angle
against the tangent of the shaft surface they
are configured to run against and has the
structure, which follows flexibly to the size
change by heat expansion, and the shake of
a rotor.
Although the brush seal has a clearance
slightly between the shaft at the time of operation start, when the operation is entering in
a stationary state, it is designed that the
clearance between the shaft is almost lost.
A labyrinth seal is worn out by contact on an
axis, as a result, a clearance increases, and
a leakage amount also becomes large.
However, a brush seal can maintain a high
performance over a long period of time.
Recently, it came to be widely used for the
engine for aircrafts, and the gas turbine used
on the ground.
STRAIGHT TYPE
BRUSH SEAL
LE-7 TURBOPUMP SEALS
LOX Seal
He Purge Seal
Turbine Seal
HOT GH 2
GHe GH2
LOX
Brush seal arreangement of gasturbine
BRISTLE
LOX seal system of LE-7 Turbopump
BRUSH SEAL
A straight-line type brush seal is a seal with
which the element portion of a brush consists
of a straight line-like, and it is used in order
to reduce the leakage caused by the clearance between structures.
Since it is easily formed to adjust to the mating parts, it could be used for a wide application.The structure itself becomes large in
the large sized gas turbine, a deterioration of
a performance also becomes large caused
by a large amount of clearance.
Straight line type brush seal can reduce the
leakage from the clearance between the
combustion chamber of gas turbines, such
as this, and the leakage from the clearance
between static wings, it can raise the performance of a gas turbine.
15
STATIC SEALS
C SEALS
"C " seal is a metal elastic gasket with the
section of the shape of "C" type which removed a part of "O" type of metal O ring,
and is excellent in the low load characteristic and has a advantage under pressure.
There are 2 of an internally pressurized
type and an externally-pressurized face
type.
It can correspond also to various non-circular form such as a quadrangle, an ellipse form, and race track form.
Especially in the low load characteristics,
a fixing force is less than about a half of
metal O ring caused by this suitable "C"
form.
Therefore, also in the compressed condition, a contact force can go up by line
contact, and a sealing portion can acquire the big seal effect by surface coating material.
Besides, unlike metal O ring, it is a special feature to exhibit sealing capability to
the extent that it follows a maximum displacement of 0.25 mm of flange surface
helped by the self-sealing character.
E SEALS
SEAL PLATINGS
& COATINGS
SEAL MATERIAL
"E" seal is a metal gasket for gas seals
corresponding under the conditions that
deflection of a flange is large. There are 2
kinds of standard type in E seal. The first
one is an internally pressurized while the
other is an externally pressurized type.
And, there is an E seal with a large seal
height, and this is an excellent seal in
elasticity. Initial load is small comparing
with C seal, the flexibility to flange deformation is extremely high, and it can be
used to the elastic limit of the material
used, and even if mounting and dismounting is repeated, the original form of a seal
is maintained. Furthermore, EEA could
provide the flexible type "Ultra High Flex"
as an E seal which consists of two or
more convolutions which can correspond
to high elastic bending conditions. As a
seal of the part as for which the space of
the mating seal surface moves greatly,
especially E seal is the optimum and has
obtained high performance evaluation as
a high temperature part for ducting case
seal of aviation engine application.
STANDARD TYPE
HI-FLEX TYPE
16
EEA static type seal is the same composition as metal O ring,
and the temperature characteristic. It is the metal elastic gasket series which increased the capability and gives elasticity
and can trace by special structure design corresponding to
distortion of a flange. It has the characteristic which is not in
metal 0 ring. Because, it has the wide range of application
capability from cryogenic temperature to high temperature,
and self sealing character which conducts the force increasing in response to pressure increasing and the improvement
of corrosion resistance by coating, and the improvement in
the joining nature to a flange, and the spring characteristic
are excellent, it is possible to use repeatedly. EEA static type
seal is mainly used as an object for gas seals in duct related
products, such as the housing of gas turbine engine, the joint
of a rocket engines turbine pumps, and couplings. In other
case, there is a wide range application for gas and a seal for
liquids in the range from a high vacuum to a high pressure.
NAFLEX SEALS
The NAFLEX seal is composing of forked
type cross section obtained from detailed
stress analysis, and the seal lip part presents a projected form.
This is the highly effective self force increasing type metal gasket which acquires
the seal load to which the fluid pressure is
applied. The elastically stable part of a fork
and a fork part acts on a seal lip part, and
can correspond to pressure change by
compressing a lip part. High elasticity is
maintained under severe conditions, such
as high temperature, cryogenic temperature, high pressure, and a vacuum. With
this high elasticity, since a sealing is obtained by the minimum fixing force, the
structure wall thickness of a seal attachment part can be made thin, and the lightening of piping or apparatus can be achieved.
Teflon coating and silver plating are given
to the seal lip part surface, and the seal
performance is increased.
FORK
SEAL LIP
Compressed
State
Free State
COMPARATIVE TABLE of SEAL SPECIFICATIONS
C-SEAL
E-SEAL
NAFLEX SEAL
METAL O RING (REF.)
Temperature
Range
-270~+800 C
-270~+800 C
-270~+800 C
-270~+800 C
Pressure
Range
High Vacuum~300 MPa
~50 MPa
Vacuum~50 MPa
High Vacuum~300 Mpa
Material
INCONEL X-750(Standard)
INCONEL 718,Waspaloy
Stelnless Steel, etc.
INCONEL 718(Standard)
Waspaloy,etc.
INCONEL 718(Standard)
Stenless Steel,
INCONEL 600, etc.
Plating / Coating
Silver(Standard)
In, Au, Ni, Cu, etc.
No-Plating(Standard)
Tribaloy T-800
Silver(Standard)
TEFLON, Au
Silver,TEFLON, In
Au, Ni, Cu, etc.
Seal Performance
Tight Leakage
Low Leakage
Tight Leakage
Tight Leakage
Applicable Fluid
[Gas & Liquid]
All Kinds of Gass
Cryogenic, Fuel, etc.
[Gas]
Hot gass, etc.
[Gas & Liquid]
All Kinds of Gass
[Gas & Liquid]
All Kinds of Gass
Diameter Range
O.D. 6~3,000mm
O.D. 20~3,000mm
O.D. 30~1,000mm
O.D. 6~6,000mm
Seal Deflection
Capability
Maximum 0.2mm
over 0.4mm
~a few mm(by option)
Maximum 0.3mm
Maximum 0.04mm
Compression Load *
2~8 MPa/CIRC.cm
0.5~2 MPa/CIRC.cm
6~12 MPa/CIRC.cm
10~40 MPa/CIRC.cm
。
。
。
。
*Compression Load is mega-pascal force per centimeter circumference when compressesd cavity hight
17
DUCTING COMPONENTS &
FORMING PRODUCTS
JOINTS
COUPLING
E-SEAL
FLAGE
TUBE SEAL
COUPLING
BEARING
Joints could be specified into two types, as
fixed type and flexible. Typical fixed type application is shown in V shape flange joints
which use E seal. On the other hand, the typical flexible type application is shown in tubeseal.
REGID JOINTS
V type flange joint, belonging to fixed type,
consists of three composition parts. They are
composing of machined two flanges having a
mating seal surface, and "E seal" which is a
metal elastic gasket, and this configuration is
featuring lightweight and robust coupling. E
seal is a product made from a nickel-based
alloy, and has a seal of the self sealing character with a small fixing force. Since a snap fit
can be available at a flange, even if the attachment surface has turned to the downward, mounting or dismounting of the seal is
easy without dropping the seal off. Flexibility
against bending and deformation of a flange
and repeatable installation of the seal are the
typical featuring points. Besides, a biased
loading is successfully prevented by V slot
function, and even if a nut should loosen or a
bolt is damaged, coupling has the fail-safe
structure of preventing separation of a flange
by latch mechanism,. In addition, caused by
applied hinge design, it is characterized by
not applying excessive stress into any portion
during a installation procedure. And, it can
also correspond to small, large-sized, and
special form, and a material can use stainless
steel, Inconel 718, titanium, and an aluminum
alloy. And it is characterized by optimum light
weight design, it can be adapted for many
places in an aircraft. V type flange joint is
used in the bleeding air piping connection
part of an aircraft, and could increase reliability and also brings the cost performance maximum.
E-SEAL
V-FLANGE JOINT
FLEXIBLE
V-FLANGE JOINT
FLEXIBLE JOINTS
The tube seal joint which is flexible type
joint uses the precisely fabricated metallic
seal (tube seal) of high strength with which
the end presenting the spherical shape
and this enables tube seal to trace elastic
deformation. A tube seal is inserted into cylinder shape which is slightly smaller than
the diameter of a seal. The contact part of
a seal can be slide in the axial direction, or
can allow angular or twist motion. The tube
seal is mechanically reinforced by thicker
liner assembled inside and has a small
clearance between sealing diameter and
the liner. This clearance is the limit end
that spherical seal could deform. The seal
could bend until touching the liner, under
maintaining elastic condition. With this simple structure, it corresponds to the axial
displacement including torsional and angular direction. Comparing with the piston
ring type seal, a leakage could be reduce
by 2 figures. And there is slide capability
to the axial direction without fatigue under
heavy duty conditions, and the projection
area of the seal body is very small, since a
ball joint part is only a slightly larger than
connecting pipe diameter. And, it is very
compact size with the function of pressure
compensation incorporated, and the rotational direction is characterized by free and
the attachment error of the direction of an
axis is also acceptable. It is utilized as new
functional parts of an aircraft ducting.
18
The ducting system and aviation equipments of an
aircraft and space apparatus are reqired many
things. Performance stability, durability to a limit as
well as lightweight, compact, and excelling in workability are required to the maximum limit.
In order to respond to these needs, various knowhow is indispensable, such as material technology
supported by the experience, structure design technology, and fabrication, assembly technology. The
ducting related products and the various aircraft
parts which EEA supplies are supported in the technology and services which were substantial on the
basis of the engineering of PERKIN ELMER FLUID
SCIENCES currently praised from the U.S. aerospace
industry.
DUCT
ASSEMBLIES
Besides the typical joints mentioned
above, there are many other ducting related products such as bolt bundle type
Rigid Joint, Ball Joint, Pressure compensated Slide Joint, and Slide Joint for flexible piping. With regard to flexible type
joint or coupling, various products and
accessories can be chosen for every
form, size, and function.
Based on each specification, there is
many results in EEA with the product
made combining these parts. And it is
evaluated highly from the airplane equipments and the system manufacturer in the
world.
FIXING POINT
TO STRUCTURE
ENG HP BLEED AIR
CONNECTION
DHG HP BLEED AIR
CONNECTION
19
ENGINEERED
TRADING PRODUCTS
for Aircraft
Flowmeters
In the housing of a flowmeter, there is a turbine rotor, which is rotated by the flow of fluid through the meter body. An external
pickoff senses the passing at each rotor
blade through the electric field and converts
it to an electronic output.
There are two types of pickoff: one is a
Modulated Carrier type (RF type), and the
other is a Magnetic type. Both are capable
of metering with superior response, linearity,
and accuracy.
A linearizer, mounted directly on the flowmeter, takes in the electronic and temperature sensor output and sends it to a CPU.
These data are linearized and corrected in
comparison with calibration data (temperature, viscosity, density, flow rate), which are
registered in the memory in advance.
By combining a turbine flowmeter and linearizer, flow measurements at extremes, with
range of 100:1 over the usual range, can be
handled. Due to its lightweight, compactness and accurate performance, it is widely
used for aircraft engine tests and onboard
equipment.
In addition, the flow computer enables simple programming and system control, and
there are various batch controllers and flight
control modules.
Special
Forming Parts
Precision bulge forming is a method of
forming parts by expanding from the inside. Bulge forming forms parts up to 56
inches in diameter and 84 inches in
length from one-piece welded cones or
cylindrical shapes, instead of assembling various parts.
As parts receive precise pressure control in a pressure chamber, they are
stretched beyond their yield point to the
desired finished size. This method benefits productivity.
In addition, through the use of unique
pressure multipliers, two stage bulge
forming can be used to set joggles,
sharp corners and integral bead stiffness.
Also, bulge forming, Titanium hot and
cold forming, stretch forming, drop hammer forming and hydraulic forming are
applied to a wide range of materials:Stainless steel, Inconel, Aluminum,
Titanium, Hasteroy, RENE 41, laminating, and casting metals. Particularly,
plasticity of Inconel is being used to
lighten space battery cases.
Ducting Systems
EEA, with a sales and technical force in
the Asian region, supplies an excellent
service for ducting systems, F4 boundary layer control ducts, Boeing 737-300
/ 400 main exhausted ducts, V2500
thrust reservoirs, Boeing 747/767 pneumatic system ducts, PW4000 main exhausted ducts and GE/Sikorsky helicopter engine ducts, tail pipes, exhaust
ductings etc.
20
ENGINEERED
TRADING PRODUCTS
for Space
Thrusters
Filters
Valves
The thruster is essential for satellite orbit control and position control. It is not too much to
say that thruster performance is a key factor
in the success of space missions.
Primex Aerospace Company (PAC), our collaborative company, is the world leader in
monopropellant hydrazine propulsion products and rocket engines. It provided full-service capability to a wide variety of satellite,
spacecraft and launch vehicles. PAC has
achieved a remarkable delivery record to
U.S. principal programs.
VACCO' s unique etched disc filter is the industry standard for absolute rated filtration of
gases and liquids aboard satellites and
spacecraft. The etched disk filter consists of
thousands of stacked, chemically etched
discs with precise flow paths. As there is no
welding and blazing, these filters are used
for fuel control systems, servo valves, and
actuators for the prevention of pollution.
Space valves, such as various solenoid
valves, pulse valves, check valves, relief
valves, and latch valves, are used with flow
control systems in a space environment.
These valves, for example, space shuttle propellant valves, are used in most position control systems for satellites.
In particular, they are used by the U.S. space
industry for the design engineering of monopropellants or bipropellants in conditions of low
temperature.
Other valve types, like Pneumatic valves, used
for many precision gas controls.
Hydraulic valves are used in high-pressure
systems reaching to 3,000 psi in aircraft and
spacecraft.
Fuel valves are used for aircraft gas turbine
fuel control. Check valves with compact design are used for fuel and pneumatic systems
in space and small aircraft.
Regulators
Tanks
Pressure Systems Inc. (PSI) is the world's
foremost pressure tank manufacturer for
space applications. Over 3,000 propellant
management device (PMD) Xenon gas tanks,
like elastmeric diaphragm tanks, were delivered mainly to U.S. locations.
A lightweight regulator is indispensable for
satellite propulsion systems to precisely regulate the pressurized gas, which in turn controls the flow of propellants to the engines.
Our affiliated company, Stanford is dedicated to producing aircraft and satellite components and technical support, and delivers
to leading companies such as Lockheed
Martin, Daimler Benz, and Boeing.
Technical Consulting
On the basis of a strong network with domestic/foreign aerospace manufacturers and as
an engineering company, EEA supplies distinctive expertise in the fields of design, analysis, technical evaluation, development support, and the procurement of software /
hardware. We are involved in all stages of the
engineering life cycle from system design to
spacecraft operation.
21
APPLICATIONS
From the initial opportunity to develop the J47 gearbox in 1966, EEA has
followed the course of domestic production of various main shaft seals, to
the development of experimental rocket pump seals in 1967, to turbo
pump seals for the H-2 rocket and on to the development of space products. As a manufacturer of principal functional parts, and as an engineering partner in terms of state-of-the art design and ultra precision processing, EEA has achieved excellent results in
multiple development projects. EEA has superior and distinctive design capabilities, manufacturing and quality assurance performance. In addition, EEA is preparing to expand
the support system as a part of the aerospace technology
/ engineering network.
AIRCRAFT APPLICATIONS
Aero-Engines
IHI-P&W-F100
Mainshaft Seals
Gearbox Seals
V-Coupling
E-Seals
C-Seals
IHI-GE-T700
Mainshaft Seals
Gearbox Seals
Fuelpump Seals
E-Seals
Pressure Bellows Sensor
Temerature Bellows Sensor
IHI-GE-J79
Mainshaft Seals
Gearbox Seals
Fuelpump Seals
IHI-GE-T58
Mainshaft Seals
Gearbox Seals
Fuelpump Seals
Fuel Control Seals
IHI-GE-T64
Mainshaft Seals
Gearbox Seals
Fuelpump Seals
Carbon Bearings
Fuel Control
Transmission Seals
IHI-ADOUR-TF40
Carbon Bearings
Fuel Control Piston Ring
Air Bleed Valve
Generator Seals
IHI-F3
Gearbox Seals
Fuelpump Seals
KHI-LYCOMING-T55
Pressure Bellows Sensor
Temerature Bellows Sensor
IAE-V2500
Fuelpump Seals
GE-CT7(IHI)
Propeller Gearbox Seals
MHI-TS1
Secondary Flow Brush Seals
Gearbox Seals
Fuelpump Seals
E-Seals,C-Seals
Tube & Pipe Seals
Piston-Ring Seals
Carbon Bearings
Fuelpump Seals
Metal Precision Parts
Exhaust Frame
Anti-icing Valve
OTHER R&D ENGINES
Secondary Flow Brush Seals
Mainshaft Seals
Gearbox Seals
Accessary Components Seals
Tube & Pipe Seals
E-Seals,C-Seals
Tube,Pipe & Duct Seals
V-Couplings
Turbine Flowmeters
Aircraft Accessories
F-15J
P-3C
C-1
SH-60J
CH-47
HSS-2
KV107
T-4
UH-1J
US-1A
MH-53E
CSD Seal
Water-methanol Pump Seal
Flexible Joints,Air Bleed Ducts
Main Transmission Seals
APU Fuelpump Bearings & Hydraulic Pump Seals
Flight Data Recorder Flowmeter
SPACE APPLICATIONS
Space Station
Rocket & Engines
JEM( Japanese Experiment Module)
Bellows Accumulators
MB-3 ENGINE ( LOX/RP-1 PROPULSION SYSTEM )
Turbopump Shaft Seals
LE-5 ENGINE ( LOX/LH2 PROPULSION SYSTEM )
Hi-Speed Turbopump Shaft Seals
Cryogenic Static Seals
Hot-Gas Static Seals
Gas Helium Check Valves
LE-7 ENGINE ( LOX/LH2 PROPULSION SYSTEM )
Hi-Speed & Hi-Pressure Turbopump Shaft Seals
Hi-Pressure Cryogenic Static Seals
Hi-Pressure Hot-Gas Static Seals
H-II ROCKET
Large Size Cryogenic Static Seals
Satellites
Nickel Hydrogen Battery Vessels
Thrusters
Tanks
Valves
Regulators
Pressure Sensors
Static Seals
22
HEAD OFFICE
Seiwa Building
1-12-15 Shiba-Daimon, Minato-Ku, Tokyo, 105-8587, Japan
Phone. 81-3-3438-2293
SAITAMA PLANT
1500 Katayanagi, Sakado-City, Saitama, 350-0285, Japan
Phone. 81-492-81-1110
TOKYO SALES OFFICE
13F, Shiba NBF Tower,
1-1-30 Shiba-Daimon, Minato-Ku, Tokyo, 105-0012 ,Japan
Phone. 81-3-3432-0506
NAGOYA SALES OFFICE
1-301 Yashirogaoka,Meitou-Ku,Nagoya-City,Aichi,465-0051,Japan
Phone. 81-52-705-6077
AEROSPACE RESEARCH & TRADING, INC.
1731 Technology Drive, Suite 840, San Jose, CA 95110-1370 U.S.A.
Phone. 1-408-392-4047
EAGLE ENGINEERING AEROSPACE SINGAPORE PTE.LTD.
52 Serangoon North Avenue 4 #03-02 Ever Tech Bldg.,
Singapore 555853 Phone. 65-64836162
EAGLE ENGINEERING AEROSPACE KOREA CO.,LTD.
4B 5L, Chilseo Industrial Complex Chilseo-Myun, Haman-Gun,
Gyeong-Nam, Korea Phone. 82-55-587-7283
EAGLE ENGINEERING AEROSPACE TAIWAN CO.,LTD.
No.7, Lane 144, Chi Lin Road, Taipei, Taiwan, R.O.C.
Phone. 886-2-2581-0040
&
URL:http://www.eea.co.jp
EEAerospace
EAGLE ENGINEERING AEROSPACE CO.,LTD.
EAGLE ENGINEERING AEROSPACE
EEAerospace
&

eagle engineering aerospace

Transcription

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