Testing device for functional characteristic test of valve

Abstract

The invention provides a testing device for a functional characteristic test of a valve. The testing device is composed of a vibration table, a vibration rack, a bending moment loading frame and a test connecting piece, wherein the bending moment loading frame and the valve to be tested are fixedly installed on the vibration rack which is fixedly installed on the vibration table, and the bending moment loading frame comprises a bending moment framework, a loading joint, a lead screw, a lead screw connector and a force sensor. Due to the arrangement of the vibration rack, the vibration table can not bear transverse loads or lateral loads in the working process, and stability and accuracy of the test are ensured. The bending moment loading frame is adopted, bending moment is produced on the loading joint through the lead screw and the lead screw connector, bending moment loading in the needed direction is achieved, and the bending moment loads can be adjusted optionally. Due to the arrangement of a belleville spring, the problems that due to the fact that rigidity of a valve testing piece is large, and if the lead screw is directly rotated, when the bending moment is loaded to a designated value, the lead screw connector only has a very small displacement so that the lead screw cannot be fixed, and simulation on test environment distorts can be avoided.

Description

technical field [0001] The invention relates to the field of valve structure design, in particular to a test device for the test of valve function characteristics. Background technique [0002] In the field of aerospace, the structure, principle and working environment of valves, especially fuel safety valves, are relatively complex, and their functional characteristics under compound loads will directly affect the normal operation of aircraft or launch vehicles. Valves are subjected to loads such as gas pressure, temperature, bending moment and vibration during the working process. Among them, the bending moment is divided into six types: positive and negative along the x, y, and z directions, and its working conditions are very harsh, which will seriously affect the functional characteristics of the valve. [0003] In aerospace fields such as launch vehicles, it is self-evident that the functional characteristics of valves under compound loads have an important impact on ...

AI Technical Summary

Problems solved by technology

For the test of such mechanical products, the existing devices often apply a single load to the valve without vibration, which cannot simulate the entire working environment of the valve, resulting in an unrealistic ground test environment

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