Vacuum pump products in the usual use process inevitably because of incorrect use methods or loss of some problems, at this time we need to master some maintenance knowledge, to ensure the normal operation of the product, so as to ensure the normal operation of the work. Today, I would like to introduce the maintenance knowledge of reciprocating vacuum pump shaft and end cover, hoping to help you.

1. The pump shaft is generally made of 45 steel, and the seal journal is quenched by high frequency with hardness of 45-50hrc. In the process of use, the pump shaft may have journal wear, keyway rolling, bending and other damage.

During the maintenance of reciprocating vacuum pump, if the seal journal is found to be slightly covered and worn, it can be carefully polished with fine sand cloth or west oil silk stone. When the wear is more than 0.15mm, it can be plated with chromium and then ground to the specified size. For bending alignment, please refer to the repair of centrifugal pump shaft. If the damage is serious, it can not be repaired, and the new shaft and rotor can be replaced.

2. Repair of the end cover of reciprocating vacuum pump: the end cover is made of high-quality cast iron, which is practical. Due to the shaft movement, the rotor end face is not vertical and other reasons, the end cover may be scratched or worn. The flatness of the end cover plane is out of tolerance.

During the repair, the flatness of the end cover is checked by placing the knife edge ruler on the plane of the end cover, inserting a feeler gauge between the knife edge ruler and the end cover, and replacing the flatness with the maximum straightness. When the love plane is slightly abraded, you can polish it with oilstone and emery cloth. When the plane wear of the end cover is more than 0.02mm, it can be repaired by grinding on the flat grinding machine.