Double stage vacuum pump clearance adjusting device

Abstract

A double stage vacuum pump clearance adjusting device relates to the technical field of vacuum pump. The double stage vacuum pump comprises a primary pump body, a secondary pump body, an intermediate valve plate, a pump shaft, a primary impeller, a secondary impeller, an absorbing body, a vomiting body and a bearing body. Bearing axial direction sliding space is left between a driving end bearing gland and a driving end bearing at one side of the absorbing body, and a bearing axial at one side of the vomiting body is fixed on the pump shaft. An adjusting screw hole and a fastening hole are arranged on a non-driving end bearing gland at one side of the vomiting body, an adjusting bolt is arranged inside the adjusting screw hole, and a positioning nut is arranged on an adjusting screw bolt between the adjusting bolt head and the non-driving end bearing gland. Fastening screw thread holes are arranged on a bearing body which is at one side of the vomiting body and is opposite to the fastening hole, and a resilient pad is arranged between the inner side of the outer ring of the bearing at one side of the vomiting body and the bearing body. The double stage vacuum pump clearance adjusting device is simple in structure, convenient to adjust, and is capable of accurately adjusting clearance, improving performance of the double stage vacuum pump and elongating service life of the double stage vacuum pump.

Description

technical field [0001] The present invention relates to the technical field of two-stage vacuum pumps. In detail, it is a simple structure, convenient adjustment, which can accurately adjust the gap between the first-stage impeller, the second-stage impeller and the suction body, the discharge body and the middle distribution plate, so that the two-stage vacuum pump High performance, long service life two-stage vacuum pump gap adjustment device. Background technique [0002] We know that the existing two-stage vacuum pump includes a first-stage pump body, a second-stage pump body, an intermediate distribution plate, a pump shaft, a first-stage impeller, a second-stage impeller, a suction body, a discharge body and a bearing body. In the first-stage pump body and the second-stage pump body, the middle distribution plate is set between the first-stage pump body and the second-stage pump body (the left side of the first-stage pump body and the right side of the second-stage pum...

AI Technical Summary

Problems solved by technology

In the existing two-stage vacuum pump structure, the gap between the first-stage impeller, the second-stage impeller and the suction body, the discharge body, and the intermediate distribution plate is determined by the production size and cannot be adjusted accurately. Due to the error in the production size of each component, the first-stage impeller 1. The problem of friction or excessive gap between the second-stage impeller and the suction body, discharge body and the intermediate distribution plate is prone to occur, which is easy to be damaged and has low performance

When the pump runs for a period of time and the gap between the above parts changes due to wear, corrosion, etc., the working efficiency of the two-stage vacuum pump will gradually decrease, and the service life will be short

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