bow thrusters - Bergen Dieselcontact AS

BOW THRUSTERS
S p ee d s
y our
p er f or m a n c e
INTRODUCTION
When Veth Propulsion B.V. introduced the VETH-JET channel
bow thruster in 1970, a major step forward was made in the
manoeuverability of ships. This home made invention has
given Veth Propulsion an outstanding international reputation
in the marine industry.
In the over 55 years that the company exists, it has become
a well known thruster specialist. The Veth thrusters have a
solid construction, smart design and are easy to maintain.
Veth Propulsion has different kinds of thrusters in several
power ranges. This makes it possible to select the
right thruster(s) in any application.
There is a wide range of in-house developed
products like the Veth-Z-Drive rudder propeller,
the Veth-Compact-Jet, the Veth Tunnel Thruster
and the Veth Ballast Pump. Veth Propulsion
also has its own diesel department in
which generator sets are built with Scania
and SisuDiesel for marine applications.
2
veth-jet
leader
among
bow thrusters
Veth Propulsion has always invested
in the development of new products.
This has resulted a.o. in the Veth-Jet
bow thruster installation.
When the Veth-Jet was introduced,
there was a need for a bow thruster
which operated optimally 360 degrees with a shallow draught
without vulnerable parts protruding through the ships bottom.
The Veth-Jet was the answer to this desire.
In the well over 35 years that Veth Propulsion B.V. has produced
the Veth-Jet, a product has evolved on which can be depended
on under the most severe circumstances.
At the time starting with 100 and 200 hp, the range has grown
in standard ratings to over 2000 hp. The Veth-Jet finds its
application in both inland waterway vessels and seagoing ships.
In the meantime over 1500 units are installed in a diverse range
of ships all over the world.
Continued product development in mechanical, hydro dynamical
and electrical field makes sure that the Veth-Jet is and remains
the leader among bow thrusters.
veth-jet
3
PRINCIPLE OF OPERATION
The principle of operation of the Veth-Jet is as simple as it is
effective. With the help of a horizontally mounted propeller, the
water is drawn up from underneath the vessel. Through a 360°
rotating drum the water is bent 90° and guided into one or two
channels making the vessel manoeuvrable.
A 2, 3 or 4 channel execution can be chosen of which the 3rd and
4th channel can be used as a brake or emergency propulsion.
The side channels are horizontally mounted while the front
and aft channel are installed at an angle.
The rotating drum can be steered stepless in all directions.
Every position in between can be chosen with the 3 and
4 channel system.
A major benefit of the Veth-Jet is that with a minimal draught
the maximum thrust can be achieved without parts protruding
through the ships hull. A draught of 35 cm can be enough
depending on the size of the unit.
4
An additional advantage of the horizontally mounted
propeller is that also when the ship is sailing the Veth-Jet
still develops a considerable thrust. Because of the upwards
pressure of the water the propeller keeps drawing up
water much longer than for example a tunnel thruster.
Veth Propulsion has made a model test in which case the
thrust remained equal up to 10 knots.
The thrust of the Veth-Jet is high. Per kW
about 11 kg of thrust is obtained. The propeller
can be optimized in 1 turning
direction and in comparison
with other systems with
horizontal mounted
propellers there is
a minimal turn of
the water and a
horizontal pressure.
Besides the in house development there is
a close cooperation with several research centers.
The pictures below show tank tests during which thrust was
measured on a sailing ship.
PRINCIPLE OF OPERATION
5
The Veth-Jet can be driven, which ever is
desired, by a diesel engine, electric motor or
Driving
in
different
ways
hydraulic motor.
In case of a diesel engine or electric motor
the engine can be flexibly mounted on top
of one of the side channels. A ready made
engine foundation can be supplied making
the installation of the engine very easy.
Veth Propulsion can supply the Veth-Jet with a package
including the driving motor when desired by the customer.
Diesel driven
Driving possibilities
6
SCHEDULE FREQUENCY DRIVEN VETH-JET
There are several electrically driven executions. The revolutions
can be controlled by means of a frequency converter, an electrical
shaft or by means of a rotary resistance.
In the schedule on the left an example of a Veth-Jet with a frequency
switch
control
panel
controlled e-motor is shown. In this situation the same frequency
converter is also used to control a loading pump of a tanker.
generator set
When the generator, during bow thruster use, does not have to drive
any other consumers then an electric shaft drive can be an option.
Frequency
converter
This is an economically interesting solution in which the revolutions
are controlled by the diesel engine of the generator set.
Veth Propulsion has a great expertise and experience with all these
systems and can advise the best solution for every situation.
Cargo pump
control
box
Veth-jet
bow thruster
Electrically driven
Hydraulically driven
7
VETH-JET
LEADER
AMONG
BOW THRUSTERS
The rock solid and thought through
construction has given the
Veth-Jet a reliable name. Composed
of high-grade materials and
comprehensively tested in practice
the Veth-Jet stands for carefree
use. The gearbox is manufactured in our own work shop and
is equipped with square spirally cut gears and a bronze worm
wheel for steering of the rotating drum. This worm wheel is self
braking so the drum will always remain in the correct position.
The steering is done hydraulically. Besides the steering motor
also the hydraulic pump and steering valves are mounted on the
gearbox which makes the Veth-Jet a compact and self-contained
thruster. The steering system is so strong that it is able to steer
with full engine rpm without any problem.
All rotating parts air oil bath lubricated so that the installation
requires a minimum of maintenance. The Veth-Jet has a long
life time with a minimum amount of wear because every
Veth-Jet is designed with high safety factors.
PRODUCT PROFILE
8
There are many reasons to choose a Veth-Jet bow thruster.
The main reasons are:
Strong qualities:
• Fast steering time in about 6 to 7 seconds from PS to SB.
• Solid integrated 70:1 worm wheel for steering.
• Compact oil bath lubricated gearbox.
• Possibility to steer with full propeller rpm.
• Hydraulic pump for steering built on gearbox.
• Requires a minimum of maintenance.
• Solid construction, so long lifetime.
Advantages:
• Maximum thrust at minimum draught.
• The propeller turns in 1 direction (maximum efficiency).
• Gives thrust during sailing.
• No protruding parts under the vessel.
• The 3 and 4 channel system can also be used as auxiliary
propulsion or brake.
• High thrust: about 11 kg./kW.
• No reverse clutch is required.
• Possibility to change propeller without docking.
Strong qualities and advantages
Type 2k/3k/4k
Maximum Power kW (Hp)
Nominal Reduction revolutions
Propeller
diameter
K-800
184 (250)
1800
3,071 : 1
780 mm
K-1000
276 (375)
1800
3,071 : 1 980 mm
K-1200
404 (550)
1800
4 : 1
1180 mm
K-1300
478 (650)
1800
4 : 1
1280 mm
K-1400A
553 (752)
1800
4,455 : 1
1420 mm
K-1400
687 (934)
1800
4,909 : 1
1420 mm
K-1500
725 (986)
1800
4,909 : 1
1520 mm
K-1650
956 (1300)
1800
5,091 : 1
1650 mm
K-1750
1102 (1499)
1800
5,091 : 1
1750 mm
K-1800
1250 (1700)
1800
5,583 : 1
1800 mm
K-2200
1600 (2176)
1200
4,8 : 1
2200 mm
9
Applications
10
Applications
11
The standard range of Veth-Jets consists of over 50
executions which is adequate for most applications.
When a customer however has additional wishes
we can also design on a project basis.
On the picture on the left e.g. a Veth-Jet can be
seen which was supplied to the American Navy.
Special features of this unit are a built in hydraulic
clutch and a mechanical emergency steering which were
added to the standard design. But also tailor made trainings can be
arranged by Veth Propulsion at our factory or on location.
SPECIALS
12
Controls
Veth Propulsion has got its own electronics department in
which the control systems are developed and fabricated.
State of the art technology is used like a CAN bus
communication system.
The controls of the Veth-Jet are clearly arranged and easy to
operate. In the standard supply a separate control panel and
read out panel are included for placing in the wheel house.
Very practical is the follow up combined control lever for
steering and rpm control. In the well arranged display besides
the position indicator also the rpm counter, oil pressure and
water temperature meter of the diesel engine and the alarms
can be read. Besides the standards we can also adjust to the
wishes of the customer. The Veth electronics make driving
and control simple and reliable.
13
VETH-JET V EXECUTION
For situations in which there is no space for a horizontal driving motor also
a vertically driven Veth-Jet can be delivered. This V model can be equipped
with electric and hydraulic motors.
Because of a sophisticated design the height of the unit is limited to a
minimum. Just like the Veth-Jet with the square gearbox the steering worm
wheel and the driving gears are integrated in 1 compact gearbox. The unit is oil
bath lubricated so that no greasing machines are required and maintenance is
kept to a minimum. The gearbox is silent and the unit can be mounted flexibly
when for example applied in a passenger vessel.
ALTERNATIVE EXECUTIONS
Valve Jet
In addition to the Veth-Jet Veth Propulsion has developed a similar
type of bow thruster with a different steering system. The thrust
direction is not diverted by a rotating drum but by big valves
controlled by hydraulic cylinders. This thruster which in many cases
is placed as a stern thruster is built on specification from 1500 hp
to any desired power. The Valve-Jet is extremely suitable for ships
which are connected to a Dynamic Positioning System.
14
The Veth-Jet can also be delivered with a Gondola. This mainly is used
for vessels like barges and crane ships. The Veth-Jet is built together
completely with engine in a tailor made Gondola. Also attachments like
a cooler for the engine, hydraulic tank and control box are mounted and
connected. The installation of the thruster is easy and can be done in a
very limited time.
gondel
Installing a 4-K-1800 of 1.700 Hp
15
S p ee d s
y our
p er f or m a n c e
Griendweg 1 Papendrecht The Netherlands
P.O.Box 53 3350 AB Papendrecht The Netherlands
Phone +31(0)78 - 6152266 Fax +31(0)78 - 6411169
E-mail: [email protected]
www.veth.net