Testing machine for testing the durability of materials in a high-pressure hydrogen environment

Abstract

The invention relates to the field of material mechanical property testing equipment development, and aims to provide a tester for testing durability of a material under a high-pressure hydrogen environment. The tester comprises a main machine and a high-pressure hydrogen environment box; only one side of the environment box is provided with an opening, and a sealing seat is hermetically jointed with the box at the opening of the box through a pin; a loading rod with a piston is arranged in a central through hole of the sealing seat; at least two sealing elements jointed to the sealing seat are arranged on the loading rod, and the piston is positioned between the two sealing elements; at one side close to the internal opening of the through hole, the space between the piston and the sealing element is communicated with the external atmosphere; and the through hole space between the other side of the piston and the sealing element forms a balance cavity, and the balance cavity is communicated with the cavity of the box through a hydrogen passage in the sealing seat. According to the tester, balance of gas thrust of the loading rod is realized by using air pressure in the high-pressure testing cavity; and a load sensitive element for directly measuring the load of a test sample is arranged in the loading rod, so that the interference of the high-pressure sealing elements to the load measurement precision is avoided.

Description

technical field [0001] The invention belongs to the field of material mechanical property testing equipment development, and particularly relates to a testing machine for testing material durability in a high-pressure hydrogen environment. Background technique [0002] Hydrogen energy has the advantages of high conversion efficiency, clean combustion products and diversified uses, and is an important secondary energy in the new century. Economical, efficient, safe and reliable hydrogen storage technology is the key to the industrialization of hydrogen energy utilization. High-pressure hydrogen storage equipment has simple structure, low compression energy consumption, and fast charging and discharging speed. It is currently the dominant hydrogen energy storage method. In order to meet the requirements of the driving range of hydrogen vehicles, the storage pressure of high-pressure hydrogen is mostly above 35MPa. [0003] However, long-term work in a high-pressure hydrogen ...

AI Technical Summary

Problems solved by technology

If the built-in type is used, the load sensor is placed in the high-pressure test chamber, and hydrogen gas can penetrate into the load measuring element, changing its resistance and other properties, resulting in distortion of the measurement results; if the load sensor is placed externally, the friction force at the high-pressure hydrogen pneumatic seal needs to be removed , and this friction force changes with the number of loadings, so it is difficult to measure accurately

[0007] At present, there is no relevant testing machine at home and abroad to give a better solution to the above problems.

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