Test device for sealing property of rubber O-shaped ring under high pressure hydrogen environment

Abstract

The invention discloses a test device for a sealing property of a rubber O-shaped ring under a high pressure hydrogen environment. The test device mainly comprises a to-be-tested rubber O-shaped ring, a gland, a signal processor, a protecting shell, a bolt, a tapping port, a cantilever type pressure sensor, a hydrogen sensor, a force transferring rod, an O-shaped sealing ring, a pressing ring, a base, a gas inlet / outlet, a gasket, an inner bolt and an outer bolt, wherein the pressing ring has a hollow annular structure; a test chamber is formed between the gland and the base and is sealed by the to-be-tested rubber O-shaped ring; the base is arranged as a drum with an opened upper part and a closed lower part; and the gas inlet / outlet is formed at the center of the bottom end of the base and is used for sucking and discharging the test gas. According to the invention, the measurement for the sealing contact stress and the hydrogen leakage volume of the rubber O-shaped ring under the high pressure hydrogen environment can be realized; the test for the sealing properties of the O-shaped sealing rings in different compression ratios can be realized; and the test device has the advantages of simple and convenient operation, economical effect and reliability.

Description

technical field [0001] The invention belongs to the field of development of mechanical structure sealing performance testing equipment, in particular to a rubber O-ring sealing performance testing device in a high-pressure hydrogen environment. 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 the high-pressure hydrogen system, but their long-term operation in the high-pressure and high-purity hydrogen environment is prone to hydrogen-induced damage, resulting in leakage failure, which seriously endangers the safety of the system and even causes 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 perf...

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Problems solved by technology

[0004]However, the existing test equipment sample installation is cumbersome and time-consuming, and lacks an economical and reliable contact stress measurement structure, and even the contact stress measurement point is very likely to become a leak point causing The test failed; at the same time, it lacks the adjustment function of the compression rate of the rubber O-ring, so that the same device can only target fixed sealing groove parameters

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