Fretting wear testing machine in high temperature and high pressure water or steam environment

Abstract

The invention discloses a fretting wear testing machine in a high temperature and high pressure water or steam environment, wherein two workpieces for testing are clamped by arranging fixtures and placed in an autoclave which is positioned in the high temperature and high pressure water or steam environment by a high temperature and high pressure water circulating system, vibration excitation effect is applied to the testing workpieces in the autoclave by a loading device, and thereby the fretting wear test in high temperature and high pressure water or steam environment can be performed. The testing machine can simulate infinitesimal displacement amplitude and high vibration frequency fretting wear test under the primary and secondary loop temperature, pressure and hydrochemistry condition of nuclear power plant; the testing machine can perform slip wear test or impact wear test, and the friction coefficient and the wear coefficient between the friction pair can be obtained by measurement; the components of the testing machine are reasonably distributed, thus ensuring that the load and displacement loading of the testing machine is effective and reliable; the load control and measurement accuracy is high, and the friction force between the friction pair can be quantificationally obtained.

Description

technical field [0001] The invention relates to a high-temperature and high-pressure water or steam environment fretting wear tester. Background technique [0002] In engineering practice, the problem of component wear and failure caused by vibration often occurs, especially in the nuclear power plant system, some structural parts collide with adjacent structural parts under the action of flow-induced vibration, resulting in friction and wear problems with small displacement amplitudes. Among them, the relative motion mode between the friction pairs can be slip and impact, and the contact mode between the friction pairs can be point, line, or surface contact. The measurement needs to obtain the friction coefficient and wear coefficient between the friction pairs. At present, the experimental research is relatively difficult, and the friction coefficient and wear coefficient are difficult to measure. This is mainly due to the technical difficulties in the design of the test...

AI Technical Summary

Problems solved by technology

At present, the experimental research is relatively difficult, and the friction coefficient and wear coefficient are difficult to measure. This is mainly due to the technical difficulties in the design of the testing machine for the fretting wear test in the high temperature and high pressure water or steam environment and the fixture design for the wear test in the autoclave. None of the machines are suitable for simulating the temperature, pressure, and water chemical conditions of the primary and secondary circuits of nuclear power plants for small displacement amplitude and high vibration frequency fretting friction and wear tests.

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