Pressure alternating test structure

Abstract

The invention discloses a pressure alternating test structure, which comprises a supporting frame fixedly mounted on equipment, wherein one end of the supporting frame is fixedly connected with a telescopic air cylinder, and the other end of the supporting frame is fixedly connected with a telescopic oil cylinder. According to the pressure alternating test structure, the telescopic air cylinder and the telescopic oil cylinder are arranged on the supporting frame, the telescopic air cylinder is pushed by an air source, a medium in the other end of the telescopic oil cylinder is compressed through a movable joint to achieve the purpose of pressure change, the medium in the telescopic oil cylinder is extruded through continuous stretching and retracting of the telescopic air cylinder to achieve the influence of test pressure change on a cylinder cover valve seat, and meanwhile, a supporting and fixing device arranged on the supporting frame is combined, so that the effect of stably supporting and fixing the cylinder cover valve seat during detection is achieved, manual auxiliary supporting is not needed, the accuracy of air tightness detection of the cylinder cover valve seat is further improved, and manpower is effectively saved at the same time.

Description

technical field [0001] The invention relates to the technical field of test structure tooling, in particular to a pressure alternating test structure. Background technique [0002] At present, the existing test of the tightness of the engine cylinder head valve is mainly to detect the airtightness of the hard seal between the cylinder head valve seat and the valve. According to market research, the current test method is flow type measurement position, and there is a test It is inconvenient. At the same time, the valve seat of the cylinder head needs to be manually fixed during the test, and the valve seat of the cylinder head is often unstable during the test, which leads to problems such as low test accuracy. To this end, we propose a stress-alternating test structure. Contents of the invention [0003] The purpose of the present invention is to provide a pressure alternating test structure to solve the problems raised in the background art above. [0004] In order to ...

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Problems solved by technology

[0002] At present, the existing test of the tightness of the engine cylinder head valve is mainly to detect the airtightness of the hard seal between the cylinder head valve seat and the valve. According to market research, the current test method is flow type measurement position, and there is a test Inconvenient, at the same time, the cylinder head valve seat needs to be manually fixed during the test, and the cylinder head valve seat is often unstable during the test, resulting in low test accuracy and other problems

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