Device for detecting sealing performances of rubber sealing ring in high-pressure hydrogen

Abstract

The invention discloses a device for detecting the sealing performances of a rubber sealing ring in high-pressure hydrogen, and the device comprises a sealing upper cover, a pressure cavity, a sealinglower cover, a cantilever-type pressure sensor and a force transmission rod. The sealing upper cover covers the pressure cavity in a sealed manner, and an air cavity is formed between the sealing upper cover and the inner wall of the pressure cavity. The sealing upper cover is provided with a stepped detection plane corresponding to the air cavity, and extends out to be provided with an assemblycolumn. The sealing lower cover is disposed in the air cavity, and sleeves the assembly column in a sealed manner. The sealing lower cover is provided with a stepped cooperation plane corresponding tothe stepped detection plane. At least two rubber sealing ring installation spaces are formed between the stepped cooperation plane and the stepped detection plane. The force transmission rod makes direct contact with a main sealing plane of the sealing ring, thereby solving a problem that the evaluation of the sealing performance of the sealing ring is affected by a condition that the contact stress of the main sealing performance cannot be directly measured in the prior art. According to the invention, a measured part is the main sealing plane of the sealing ring, so the device can directlyreflect the amplitude of the contact stress withstood by the main sealing plane.

Description

technical field [0001] The invention relates to the field of detection devices, in particular to a detection device for the sealing characteristics of a rubber sealing ring under high-pressure hydrogen gas. Background technique [0002] Hydrogen energy is an important secondary energy source in the new century, and high-pressure hydrogen storage systems have become the focus of hydrogen energy industrialization in countries all over the world. Rubber seals are an indispensable and important part of high-pressure hydrogen systems, but their long-term operation in high-pressure and high-purity gas environments is prone to hydrogen-induced damage, resulting in leakage failures, seriously endangering system safety and even causing disasters. In order to ensure the long-term and reliable operation of the rubber sealing structure of the high-pressure hydrogen system, it is necessary to test and evaluate the sealing performance of the O-ring rubber sealing ring in the high-pressure...

AI Technical Summary

Problems solved by technology

[0004] The measurement parts of the existing measurement devices are directly exposed to the hydrogen environment and are interfered by hydrogen; the measurement parts must use expensive hydrogen-resistant strain gauges, and the life of the parts is greatly shortened; the pre-compression needs to be adjusted by replacing the gasket, and the contact stress The measurement point is not located on the main sealing surface, so the force on the main contact surface cannot be obtained. In practical applications, the force on the main sealing surface directly affects the sealing performance of the sealing ring; and, it can only be used for fixed specifications. The O-ring is tested, and the sealing rings of different specifications cannot be tested

Images