Breaking stress testing device for polyimide moulding pipe and application thereof

Abstract

The invention belongs to the technical field of breaking stress test, and specifically relates to a breaking stress testing device for a polyimide moulding pipe. The device comprises a supporting platform, a pressing column and a baffle mechanism, wherein a storing groove is transversely formed in the middle part of the upper surface of the supporting platform; friction reducing balls are uniformly embedded into the inner wall of the storing groove; a propping column and a pressing column are arranged, a compressing mechanism directly acts on a propping column and indirectly acts on the pressing column, so that the pressing column uniformly applies force to the tested pipe, and the problem of test result error due to excessively high local pressure can be avoided; a propping plate, the propping column and the pressing column are transversely arranged, so that the problem of gravity effect is avoided; the friction reducing balls are provided, so that the frictional force between the propping column, the pressing column and the storing groove can be reduced, and as a result, the influence on the test is reduced; a rear supporting semi-ring and a front supporting ring are used for supporting the testing object, so that the testing object can be conveniently picked and stored and is limited to transversely and lengthways move.

Description

technical field [0001] The invention relates to the technical field of failure stress test, in particular to a failure stress test device of a polyimide molded part pipe body. Background technique [0002] It has the characteristics of high strength, low friction coefficient, low expansion coefficient, and self-lubrication at high temperature. It is a wear-reducing and anti-vibration part installed between the adjustable blade journal and the casing of a certain type of engine high-pressure compressor. It supports the blade and reduces the frictional resistance between the casing and the journal of the blade. If the tube body of the polyimide molded part is worn and deformed, the working stability of the blade under the action of the airflow excitation force may decrease, which will affect the rectification stability of the blade to the airflow, resulting in a local stall of the airflow, and in severe cases, it will lead to Flutter. [0003] For example, Chinese Patent Pub...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide polyimide molded part pipe body failure stress test device, to solve the existing failure stress test device proposed in the above-mentioned background technology when in use, wherein the connecting rod and the pressure bar of the structure are placed vertically, Its gravity will have a certain impact on the test results, and the unsteady connection between the power mechanism and the connecting rod will cause the pressure bar to press on the polyimide molded part to be unbalanced, which will affect the test results.

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