When installating idler roller bearing housing, should pay attention to cooperate with the idler roller, and in the high temperature, high speed, it must meet certain requirements. So when considering its cooperation, should consider the following two points:

1 when the temperature rises to high temperature, how do the size and hardness change?
2 At high speed its centrifugal force caused a series of mechanical changes and shape changes.

All in all, in the high speed and high temperature conditions, in cooperation with the idler roller to maintain the precision and working performance, and this is also a certain degree of difficulty. So, in order to ensure the bearing stamping after the installation of the idler rolling deformation is smaller, the amount of interference fit to control can not be too large, and the centrifugal force in high speed and high temperature under caused by thermal expansion can also offset the surface of the back pressure. If the bearing seat with the stamping surface is loose, carefully calculated the amount of interference is the premise that must be considered in the above two cases, while at room temperature and constant speed under the effective interference for stamping bearing that can be invalid.
Idler roller sealing performance, the entire use of the environment, it is very important. Good sealing idler roller line can effectively prevent coal cinder, sludge and so on erosion roller, the maintenance and the service life of the idler roller.

The following simple about how the sealing performance of the idler roller maintenance:

1 normal start before the required hydrostatic test, mechanical seal face, check the multi-stage pump sealing ring and the seal cover, if there are questions, one by one check solution. 

2 and then carry out the normal operation of the roller, to observe whether the temperature rise of the sealing part of the advanced multi-stage pump is normal, there is no leakage phenomenon. If there is a slight leak, you can run for a period of time, so that the end face fitting even more uniform, to reduce the amount of leakage to normal so far. Such as running 1-3 hours, the amount of leakage is still not reduced, it is necessary to stop the inspection. 

3 Idler roller before starting the cleaning pipeline, to prevent rust impurities into the sealed cavity. 

4 Idler roller multi-stage pump before starting, should be kept sealed cavity filled with liquid or seal of the media, such as a separate seal system should be started, the cooling water system must also start circulation.