Online Condition Monitoring by DynaView®

DynaView
®
Online Condition Monitoring by DynaView
®
Full fluid flow
Sampled fluid flow
CCD/CMOS camera (2 Mpix)
Lens x4 mag
Wear debris
TV rate camera image
processing shape classification
Introduction
Aim
The reliability, availability and safety of installations are particularly
significant challenges for offshore platforms. The costs for servicing
and maintenance of the offshore installations are normally several
times higher than for onshore facilities due to use of costly equipment
which is typically located hundreds of kilometres from shore.
With condition monitoring it is possible to detect at an early stage
many cases of wear-related damage and appropriate maintenance
can be scheduled in accordance with equipment requirements.
Effective condition monitoring requires both accurate sampling
of the lubrication system and effective analysis of the debris in the
sample. Inaccurate or inconsistent sampling can easily lead to erratic
trending results, while ineffective sample analysis can miss critical
faults. Non-representative oil samples can come from incomplete
or omitted purging of a sample port prior to drawing the sample,
or obtaining the sample substantially after equipment shut down.
Similarly, poor choice of an online sampling location can generate
non-representative samples.
l To develop a real time oil debris monitor having the capacity to
identify type, severity and rate of progression of one or more
mechanical faults utilizing particle size and shape in fluids associated
with hydraulic systems.
l To direct transition to online operation, which result to:
o Eliminating routine sampling
o Eliminating need to transfer sample when analysis is done onsite
o Enabling remote or local interpretation
l To be able to record critical parameters from the hydraulic system
with other type of sensors
l To support Condition Based Maintenance and off-shore requirements for reduced maintenance personnel on future platforms and
reduce maintenance costs
Sample analysis
Wear mode classification
Severe sliding wear
400
Full fluid flow
Sampled fluid flow
CCD/CMOS camera (2 Mpix)
concentration (ml-1)
350
Machine condition
assessment
300
250
200
Maintenance
action
150
100
50
0
20-25
25-50
50-100
>100
size range (µm)
Lens x4 mag
Wear debris
TV rate camera image
processing shape classification
Trending
DynaView description
Internet
DynaView is an on-line condition monitoring system based on integration of LaserNet Fines and DynaSamp. The DynaView unit could
remotely be controlled from Online Condition Monitoring Centre
(OCMC) via internet or onboard Ethernet Network. Optical sensor
is used for detecting and classifying suspended particles in hydraulic
oil systems. The instrument provides objective evidence of machinery
faults through the size distribution and morphological analysis of
wear debris and contaminants in oil samples. DynaSamp sampling
device provides accurate repeatable sampling of the flow, which can
eliminate the problems of non-representative and erratic samples.
The DynaSamp device may provide a continuous and autonomous
sampling, which makes it possible to avoid manual drawing of the
oil sample. This is an essential requirement for online monitoring. All
major items of wear and process information will be recorded in a
database and will later be automatically evaluated, aggregated and
visualized to ensure efficient service planning. DynaView will be able
to record critical parameters from the lubricating system to assess the
current health, which could be important for the system, such as
viscosity, temperature, pressure, vibration and etc. It ensures high
information reliability with minimum personnel. Remote monitoring using computer
Remote monitoring using
mobile
sing mob
bile phone
bile
Condition monitoring
back to FRAS HQ
data transfer
d
DynaView unit installed at remote site
The remote access makes possible that the condition monitoring be
performed by skilled onshore personell. They can correctly evaluate
and interpret the result. The estimated condition/health of all the
machinery/units could daily be stored in a database in the form of
a simple report protocol. Operators offshore may have access to the
database and they will be informed immediately for any important
information related to the condition/health of any machinery/units.
In order to achieve a service planning, the historical presentation of
the wear level (trending) could be determined continuously, which
makes it possible to estimate residual service life for the machine.
FRAS TECHNOLOGY AS
Postboks 202, 1431 Ås, Norway
Tel: +47 64 97 06 40 / Fax: +47 64 97 06 41
Email: [email protected]
www.fras.no
TRENDING the quantity of wear particles in a sample over a period of
time for a specific machine is a recommended method for identifying an
underlying abnormal wear mode. The trending screen permits the user
to trend any of the specific abnormal wear particle types, i.e., severe,
fatigue, cutting and nonmetallic.