MSSC GDMS-OMD14, Руководство пользователя

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GDMS-OMD14
®
User Manual
Release 160623
(revision 160704)
MSS
AG
Page 2.2
2.2. Installation Position
The position for the GDMS-OMD14 sensors and SOPS in the engine wall must be
chosen carefully. Using existing drilled holes, for example used by an old oil mist
detection system, the installation is easy.
Anyway, the splash oil concentration inside the engine is a very important factor
and must be taken into consideration:
Each engine type has got its own characteristics which influence the splash oil
concentrations inside the engine. The areas of high splash oil concentration “follow”
the rotation of the crankshaft. During engine work splash oil forms discoidal zones
with very high splash oil concentration (also called “splash discs”).
In an in-line engine two “splash discs” appear between the conrod and the crankweb.
In a V-engine a third “splash disc” appears between two conrods.
It is important to choose the installation position outside the “splash discs”!
In a four-stroke engine the sensors must be installed on the side where splash
oil hits the sensors on the top. Otherwise, the GDMS-OMD14 Diffusor has to be
installed to the SOPS.
Two-stroke engines have no definite rotational direction, so the splash oil is not
always hitting the top of the SOPS! Also the other different characteristics of an two-
stroke engine compared to a four-stroke engine require the usage of the Diffusor on
two-stroke engines!
In Fig. 2.1. you can see an example for installation for a four-stroke diesel generator
set. The left top position of the crankcase was found here the best for oil mist
monitoring.
Fig 2.1. Example of Installation for Sensors and SOPS