Performance testing device for sealing gasket under high pressure and low temperature environment

Abstract

The invention relates to a performance testing device for a sealing gasket under a high pressure and low temperature environment. The device comprises a test cavity, a liquid nitrogen refrigeration system, an electric heating temperature control system, a pressure adjustment system, a vacuum system, a data acquisition system and a visual observation system. The device provided by the invention cancontrol the temperature and pressure of a system in a wide range, and can realize the sealing performance test of the sealing gasket in the test pressure of 0 to 5 MPa and a temperature control rangeof -160 DEG C to +80 DEG C.

Description

technical field [0001] The invention relates to a sealing gasket, in particular to a sealing gasket performance testing device under high pressure and low temperature environment. Background technique [0002] In the application of related equipment structural parts in the fields of industrial production and aerospace, in many cases, there are both high pressure characteristics and low temperature working conditions. For removable structures, the performance of their seals is critical. In order to test the quality and sealing effect of seal products under extreme conditions, it is necessary to have a detection system to realize the required simulation function of low temperature and high pressure real working conditions. [0003] Through the search of the existing technology, it is found that most of the published patents are gasket sealing performance test devices under normal temperature and high pressure, high temperature and high pressure. For example, CN200910183433.4...

AI Technical Summary

Problems solved by technology

Patent Publication No. CN108332959A patent "a high and low temperature sealing test bench" according to its described features, the sealing ring is installed in the sealing groove of the test cylinder, and the whole is placed in the temperature control box, although the title involves High and low temperature, but did not specifically clarify the controllable temperature range of the temperature control box, especially how low the temperature of the sample and hydraulic working fluid can reach. The temperature control box is in a non-vacuum state, and no gas replacement measures are mentioned. If it is a deep low temperature working condition, it is easy to fog and frost after cooling down, and the surface of the test tank will condense and frost, making it difficult to intuitively distinguish whether the seal is leaking

Patent Publication No. CN206074195U's patent "a low-temperature sealing test device" uses a helium mass spectrometer to detect leaks. The low-temperature vacuum tank is immersed in liquid nitrogen. Since the inside of the test chamber is a vacuum environment, there is no heat conduction and convection. It is difficult to cool down the heat exchange and test equipment, and this system is more suitable for extremely small leak rate. If the leak rate is slightly larger, it may directly damage the helium mass spectrometer leak detector. In addition, the seal to be tested needs to be welded on the top of the cryogenic vacuum tank. This will break the test piece

In addition to the above-mentioned related patents, no other related invention patents have been found. Therefore, there is no test device that can seal the seal and its working fluid while meeting the controlled deep and low temperature range and high pressure conditions. Gasket sealing performance test, and an experimental device with intuitive visualization function

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