Mine submersible pump shaft and bearing inspection and assembly

Under normal circumstances, the mine submersible pump journal can not have scars, journal cylindrical cylinder tolerance value of 0.0lmm; gear pump after a period of time, the maximum wear of the journal shall not be greater than 0.01D.
Mine submersible pump bearings generally use both rolling bearings and plain bearings, and sliding bearings for the form of copper sets. The use of rolling bearing gear pump bearing inner ring and the shaft with the H7 / js6; needle roller bearings without inner ring, the shaft and the needle with the H7 / h6; needle roller bearing outer ring and the cover with the K7 / H6, the use of sliding bearing mining pump bearing bore and cylindrical coaxial degree tolerance of 0. 01 mm; sliding bearing outer and end cover with R7 / h6;
Gear pump bearing wear should be replaced after the super-standard, rolling bearing assembly method and centrifugal pump rolling bearing assembly method is the same. With copper sleeve for the bearing gear pump, in the replacement of copper sets, the first should check the copper sleeve and the cover with the situation. In compliance with the requirements, the copper sleeve coated with oil, with a press to press it into the pump cover body, and finally in the bearing and end cap interface drilling thread with screws to fix it, to prevent copper sets Rotation or axial movement.
   Copper sleeve assembly must be checked after the journal and copper sleeve with the gap, if the gap is too small, should be based on the journal, scraping copper sets, until meet the requirements so far. On the contrary, if the gap is too large to re-replace the copper sleeve.