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Specification
ISO number/NAS grade
4.2.7 Connecting the oil supply system
All the information required on the connection of the oil supply system to the bearings can be found in the
machine dimension drawing / dimension drawing text and in the instructions provided by the manufacturers
of the bearings and the oil supply system. Further, you should also observe the following information.
1. Make sure that the thermometers of the insulated bearing do not jumper the bearing insulation.
2. Close all unused drill holes with screw plugs. Exception: The atmosphere connection remains open.
3. Route the pipes so that no loads or vibration can occur at the bearing housing connections.
4. Flush the oil-circulating system prior to installation of the oil pipes until only clean oil comes out. To do this,
use the quality of oil as specified for use later in operation.
5. Make sure that the oil supply system operates for a sufficiently long time before the motor starts and
continues to operate for some time after the motor stops. This is how you avoid the bearing running dry
when the motor accelerates and decelerates.
6. Connect the oil supply system to the bearings.
4.2.8 Connection of cooling piping (air-to-water cooler, cooling lubrication
system)
Connection between flanges on the water coolers or lubrication oil devices must be done by using flexible
element (see
Fig.
8) due to mutual interactions between two independent piping. Flexible element avoid
relieve movement stress, reduce noise, isolate vibration, compensate for misalignment during machine
operation.
Requirements for coolant piping:
-
Ensure that the coolant lines are routed and supported so that the connection flanges are not exposed
to stress, strain or vibration loads.
-
The required data for the connection flanges are given in the machine dimension drawing/dimension
drawing text.
Product documentation 1D 3.8.en
ISO code
ISO 17/15/12
Tab. 2 Oil cleanliness requirements
Fig. 8 Example of flanges flexible connection
Rev. E, 10/13
NAS code
NAS6
page 22/42
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