Tool for pump pressure tests of motor casing

Abstract

The invention discloses a tool for pump pressure tests of a motor casing and belongs to the tool field. The tool comprises a hydraulic cylinder component, a sealing washer, a fastener, a one-way valve, an oil return switch and a sealing exhaust component. The hydraulic cylinder component comprises an oil cylinder, an oil port, a through hole, a piston and a piston rod; a cavity is arranged in the oil cylinder, the piston is arranged in the cavity and is in sliding connection with the inner wall of the oil cylinder, and the cavity is separated by the piston into a first sub-cavity and a second sub-cavity which are communicated with the outside through the oil port and the through hole respectively; one end of the piston rod is fixed on the piston, and the other end of the piston rod stretches out of the oil cylinder; a motor casing to be tested, the sealing washer and the fastener are sleeved at the other end of the piston rod successively; the motor casing to be tested and the sealing washer are arranged between the oil cylinder and the fastener; the one-way valve is arranged on the oil cylinder, and a first through groove is arranged on the piston rod; and the first sub-cavity is communicated with a first end of the first through groove through the one-way valve, and an oil return groove connected with the other end of the through hole is arranged on the sealing washer.

Description

technical field [0001] The invention relates to the field of tooling, in particular to a tooling used for a pump pressure test of a motor casing. Background technique [0002] During the working process of the motor, the motor casing will bear a certain pressure. For this reason, before assembling the motor casing and other parts of the motor into a motor, it is necessary to use a pump pressure test to detect whether the motor casing is leaking under a specified pressure state. [0003] Generally, the pump pressure test is as follows: firstly, a sealed cavity is formed inside the motor casing to be tested by using pre-designed tooling; then the cavity is filled with hydraulic oil to make the pressure in the cavity reach a predetermined value; Press for a certain period of time, and check whether there is leakage in the motor casing. Wherein, the existing tooling includes several cover plates, exhaust valves and some O-rings. Specifically, these cover plates are fixed on t...

AI Technical Summary

Problems solved by technology

Considering the uniform stress and sealing performance of the cover plate, the bolts are generally dense and evenly distributed. On the one hand, it is time-consuming to tighten all the bolts during installation; The force is greater than the pressure generated by the pressure acting on the cover plate. This force is relatively large and has a certain impact on the precision of the processed motor housing.

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