Vibration fatigue test device and method in high-pressure hydrogen environment

Abstract

The invention provides a vibration fatigue test device in a high-pressure hydrogen environment. The vibration fatigue test device comprises a vibration worktable, a closed box body, a hydrogen systemand an industrial personal computer; the vibration worktable is placed in the closed box body, and the hydrogen system is used for injecting hydrogen into the closed box body; and a vibration test sample is fixed on the vibration worktable, and the industrial personal computer controls the vibration worktable and the hydrogen system. The closed box body comprises a vibration table base, an upper top cover and an outer side wall, the outer side wall is arranged between the vibration table base and the upper top cover, and the vibration table base, the upper top cover and the outer side wall form a closed space; and the vibration worktable is placed on the vibration table base, a gas hole is formed in the upper top cover, and the gas hole is connected with the hydrogen system. The vibrationfatigue test device provided by the invention can detect a vibration fatigue service life of the test sample in the hydrogen environment.

Description

technical field [0001] The invention relates to the technical field of fatigue test devices, in particular to a vibration fatigue test device and method in a high-pressure hydrogen environment. Background technique [0002] The development of marine engineering machinery is changing with each passing day. The impeller machinery is the key power structure of ships and ships. The service life of the impeller machinery plays a vital role in the performance of the entire power system. The turbine blade is the core component of the impeller machinery. Titanium and its alloys are widely used in the manufacture of turbine blades due to their high specific strength, high melting point, corrosion resistance, small thermal expansion coefficient and excellent fatigue resistance. Vibration in a high-pressure hydrogen-charging environment is a common service environment. Studies have shown that when titanium alloy components serve in a high-pressure hydrogen-charging environment, hydroge...

AI Technical Summary

Problems solved by technology

But it is just an experiment in an ordinary environment, without considering the "environment" problem

In the actual process, most of the blades are not in service under normal pressure, but in high-pressure hydrogen-rich environments, such as submarine turbine blades, etc. The vibration fatigue characteristics obtained from such vibration fatigue tests are consistent with the vibration under actual working conditions Great difference in fatigue properties

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