Pressure testing device for adjustable impeller sealing component

Abstract

The invention discloses a pressure testing device for an adjustable impeller sealing component, which is capable of simulating internal and external pressure environments. The invention aims to provide the pressure testing device which has the advantages of simple structure, convenient operation, small volume, easy adjustment, no need of a travelling crane, low labor intensity and capability of testing the sealing performance of an inverted V-shaped rubber sealing ring in an environment with inside and outside pressures. The pressure testing device comprises a spring (6), a backing ring (7), a middle isolation cover (5), the inverted-V-shaped rubber sealing ring (4) and a pressure ring (3) which are arranged in a pressure testing parent body (2) in turn, wherein an upper blank cap (1) or a lower blank cap (8) is covered respectively to test the external and internal water pressures of the sealing component. The pressure testing device solves the problem that pressure tests are needed outside and inside the sealing component of a large-size adjustable impeller.

Description

technical field [0001] The invention relates to a pressure test device, in particular to an adjustable impeller seal part pressure test device which can simulate the pressure environment inside and outside the seal part. Background technique [0002] The pressure test device for the hub body of the adjustable impeller and the sealing part of the blade shaft head. The traditional process method is to assemble five blades and inject water inside the hub body for a hydraulic test after the hub body and blades are all processed. This method can only test the sealing state when there is pressure inside, and cannot simulate the sealing state when the outside is under pressure. Moreover, after the hub body and blades are assembled, the workpieces are relatively large, so the pressure test is inconvenient. [0003] Now the applicant has modified the design of the sealing structure, using the "herringbone" sealing ring for sealing. This structure has not been tested, and the sealing ...

AI Technical Summary

Problems solved by technology

This method can only test the sealing state when there is internal pressure, and cannot simulate the sealing state when there is external pressure. Moreover, after the hub body and blades are assembled, the workpieces are large, so it is inconvenient to test the pressure.

[0003] Now the applicant has modified the design of the sealing structure, using the "herringbone" sealing ring for sealing. This structure has not been tested, and the sealing performance cannot be understood. Now it is required to design a set that can simulate The pressure test device for the sealing part when there is pressure inside and outside the impeller, and then optimize the design of the sealing parts according to the performance parameters obtained after the test

Images