Motcom BeCOMS BCom User manual
BeCOMS®
BCom | Bearing Condition Monitoring
®
UserManual
Part No.: 1 900 00 00000
Release: 130301
(revision 190211)
motcom® BeCOMS® | BCom
User Manual
Release 130301 (revision 190211) Page iii
Declaration of Conformity
EMC-Directives: 2014/30/EU
Manufacturer motcom®GmbH
Kurt-Schumacher-Str. 28-30
D - 66130 Saarbrücken / Germany
Phone +49 681 8837904-0
Fax: +49 681 8837904-19
We declare on our own responsibility, that the products
Product description motcom®
Bearing Condition monitoring
Type designations BeCOMS®/ BCom
are in compliance with following norms:
EN 55011:2018-05/CISPR 11:2015 mod.+A1:2017
EN 55032/CISPR 22
EN 61000-4-2, EN 61000-4-3, EN 61000-4-4
EN 61000-4-5, EN 61000-4-6, EN 61000-4-8
66130 Saarbrücken, Germany, 2019, the 11th of February
Dipl.-Ing. Dieter Lott
Managing Director
We declare on our own responsibility, that the products
Bearing Condition monitoring
BeCOMS
®
/ BCom
®/ BCom
®
are in compliance with following norms:
EN 55011:2018-05/CISPR 11:2015 mod.+A1:2017
EN 55032/CISPR 22
EN 61000-4-2, EN 61000-4-3, EN 61000-4-4
EN 61000-4-5, EN 61000-4-6, EN 61000-4-8
66130 Saarbrücken, Germany, 2019, the 11th of February
motcom® BeCOMS® | BCom
User Manual
Release 130301 (revision 190211)
Page iv
Note: This User Manual is applicable for BeCOMS®and BCom.
To simplify this manual we oen named gures and pictures with BCom,
but always follow the instruction and information for BeCOMS too.
It is recommended to read this manual before commencing the repair, assembly
or commissioning of the Bearing Condition monitoring system!
Caution: The manufacturer’s warranty will become void if these instructions are
not followed!
i
!
!
motcom® BeCOMS® | BCom
User Manual
Release 130301 (revision 190211) Page v
Contents
1. System Description....................................................................... 1.1
2. Installation .................................................................................... 2.1
3. Commissioning............................................................................. 3.1
4. Performance / Maintenance Tests ................................................ 4.1
5. Troubleshooting............................................................................ 5.1
6. Repair........................................................................................... 6.1
7. Spare Parts................................................................................... 7.1
8. Attachments.................................................................................. 8.1
motcom® BeCOMS® | BCom
User Manual
Release 130301 (revision 190211)
Page vi
motcom® BeCOMS® | BCom
User Manual
Release 130301 (revision 190211) Page vii
Contents
1. System Description....................................................................... 1.1
1.1. Components.............................................................................................1.1
1.1.1. BCom- Principle ................................................................................1.1
1.1.2. BCom- System Overview..................................................................1.4
1.1.3. BCom- System Components ............................................................1.6
1.1.3.1. BCom Evaluator.........................................................................1.6
1.1.3.2. Connectors and pin-out of the BCom Evaluator ........................1.9
1.1.3.3. BCom Slip Ring Encoder (SRE) ..............................................1.10
1.1.3.4. Technical Data of BCom Slip Ring Encoder and Evaluator .....1.11
1.1.4. Editions of BCom System ...............................................................1.12
1.1.5. Versions of BCom System ..............................................................1.13
1.1.6. Intended Purpose of the Monitoring Software (opt.) .......................1.14
2. Installation .................................................................................... 2.1
2.1. General ....................................................................................................2.1
2.2. Installation Position ..................................................................................2.2
2.3. SRE Mechanical Adjustments ..................................................................2.3
2.4. Wiring Diagram ........................................................................................2.4
2.5. Software Installation (optional).................................................................2.5
2.6. PC Requirements (optional).....................................................................2.6
3. Commissioning............................................................................. 3.1
3.1. Pre-Commissioning Checks.....................................................................3.1
3.2. Syncronization of the BCom Sensor with the ring TDC
of the rst cylinder ....................................................................................3.2
3.3. Data Sampling..........................................................................................3.3
3.4. Alarm Setting and Triggering....................................................................3.4
3.4.1. Alarm Resetting.................................................................................3.6
3.5. Settings & Parameters / Using the Evaluator...........................................3.7
3.5.1. Basic Usage of the Evaluator............................................................3.7
3.6. Menu Structure.........................................................................................3.8
3.6.1. System measured values 1 (default screen).....................................3.8
3.6.2. System measured values 2...............................................................3.8
3.6.3. Graphic overview ..............................................................................3.9
3.6.4. SRE advanced infos .........................................................................3.9
3.6.5. Parameter setup .............................................................................3.10
motcom® BeCOMS® | BCom
User Manual
Release 130301 (revision 190211)
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3.7. BCom Logger measurement data storage and management (optional) 3.16
3.7.1. Compressing Data Files..................................................................3.17
3.7.2. Capturing the Graphic Screens.......................................................3.19
3.7.3. Archiving the Compressed Files .....................................................3.20
3.7.4. Manual Data Analysis for Compartment Localization .....................3.21
4. Performance / Maintenance Tests ................................................ 4.1
4.1. Function Test............................................................................................4.1
5. Troubleshooting............................................................................ 5.1
5.1. During Software Installation .....................................................................5.1
5.2. During Software Use ................................................................................5.2
5.3. Missing Control Signal .............................................................................5.3
5.4. Very low / strong signal on polar diagram ................................................5.4
5.5. Error code and Error description ..............................................................5.5
6. Repair........................................................................................... 6.1
7. Spare Parts................................................................................... 7.1
7.1. Main Spare Parts .....................................................................................7.1
7.2. Accessories ..............................................................................................7.2
8. Attachments.................................................................................. 8.1
8.1. Connection Assembly Instructions ...........................................................8.1
8.1.1. Preparing the Cable ..........................................................................8.1
8.1.2. Connecting the RS-485 converter.....................................................8.2
8.1.3. Assembling the plug..........................................................................8.3
8.1.4. Connection Cable - RS485 PCI Card to Evaluator ...........................8.4
8.2. Wiring Diagrams.......................................................................................8.6
8.3 Drawings ................................................................................................8.11
motcom® BeCOMS® | BCom
User Manual
Release 130301 (revision 190211) Page 1.1
1.1. Components
1. System Description
1.1.1. BCom - Principle
The BCom system can be used on engines and motors (turbines, pumps, etc.)
where the crankshaft is not electrically isolated from bearing shells. It utilises the
thermo-electrical (Seebeck) eect for monitoring the condition of the engine/motor,
bearings and slip surfaces, allowing to recognise failures at an early point, which
prevents large-scale part damages.
On diesel engines, the BCom system measures and evaluates thermal voltage
between the crankshaft and bearing shells, signalling changes that can be
interpreted as dangerous.
Dry friction
R
V
Fig. 1.1. Measurement principle in a diesel engine
This thermovoltage is very low (< 1 mV) during normal engine operation while the
lubrication oil acts as electrical isolation. If the oil lm between a rotating part and
its bearing becomes thinner and ruptures, which can be caused for example by
presence of metal particles in a bearing clearance, when the engine crankshaft
rubs against a bearing shell, the thermovoltage detected by SRE sensor rises.
Fig. 1.2. Redundant thermovoltage measurement
motcom® BeCOMS® | BCom
User Manual
Release 130301 (revision 190211)
Page 1.2
Fig. 1.3. Thermovoltage signal at the Data_Indicator
This information proved to be essential in early-stage diagnostic for engine parts, thus,
the BCom system is an important and eective tool in reducing engine maintenance
costs.
The thermovoltage and engine rotation speed are displayed at the control device,
Evaluator, and could be optionally displayed remotely on a PC. Both devices will
graphically indicate dangerous changes in measured values, so that the engine
personnel can immediately make decisions on further engine load and on repair
steps. The BCom system can also be connected to custom alarm or control devices
which can automatically stop the engine, preventing further engine damages. Thus,
the engine repair eorts and costs are minimised, while early detected problems can
be in most cases eliminated together with common maintenance works.
Thermovoltage peaks can be observed every time the engine starts, because the
oil lm is absent at this point and the crankshaft contacts the bearings. After a few
seconds the oil lm begins to build up and isolates crankshaft and bearing shells if
the engine is in a healthy condition.
The BCom system makes it possible to localise the beginning failure, because the
engine ring sequence is stored among other setting of BCom Evaluator. Parallel to
thermovoltage, BCom also monitors engine rotation speed and direction of rotation
with the help of an incremental encoder.
When a cylinder res, a higher thermo voltage signal is generated at spots aected
by dry friction due to high pressure. These voltage peaks superimposed with data
from the incremental encoder and with the ring sequence help to determine the
location where the oil lm ruptures.
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