High-temperature high-pressure in-situ composite fretting test device

Abstract

The invention relates to the corrosion-resistant material fretting technology, in particular to a high-temperature high-pressure in-situ composite fretting test device, and solves the problems that composite fretting at high temperature and under high pressure is difficult to realize, fretting amplitude and frequency are difficult to measure and control accurately, radial load is difficult to accurately measure and adjust in real time, frictional force between friction pairs is difficult to measure, electrochemical signals are difficult to measure in the fretting process and the like. The device comprises a piezoelectric actuator, a tension and pressure sensor, a vibration exciter, a displacement sensor, linear guides, a high-pressure autoclave, a high-pressure autoclave cover, a working electrode / auxiliary electrode holder, a reference electrode holder, a hydraulic cylinder, a thermocouple, columns, a positioning plate, a first sample clamping device, a vertical movement shaft, a horizontal movement shaft, movement shaft guide brackets, an auxiliary electrode, a reference electrode, a working electrode, a guide platform plate, guide bars and the like. In-situ tangential fretting, radial fretting and bidirectional composite fretting are performed on surfaces of samples at high temperature and under high pressure.

Description

technical field [0001] The invention relates to a corrosion-resistant material fretting wear technology, in particular to a high-temperature and high-pressure in-situ composite fretting wear test device. Background technique [0002] As the hub connecting the primary and secondary circuits of the nuclear power plant, the steam generator has thousands of heat transfer tubes inside. Inside the heat transfer tubes is the primary circuit water with high temperature, high pressure and high flow rate, and on the outside is the secondary circuit water vapor with high temperature, high pressure and high flow rate. Under the two-phase interaction of steam and water, fretting wear will occur between the heat transfer tube and the anti-vibration strip, between the heat transfer tube and the tube sheet, and between the heat transfer tube and the tube sheet support plate. Eventually lead to the failure of the heat transfer tube. Fretting wear is one of the main failure modes of steam ge...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-temperature and high-pressure in-situ compound fretting wear test device to solve tangential fretting wear, radial fretting wear and bidirectional (tangential and radial) compound fretting wear under high temperature and high pressure in the prior art Difficult to realize, difficult to accurately measure and control the fretting amplitude and frequency, difficult to accurately measure and real-time adjust the radial load of the friction pair, difficult to measure the friction force between the friction pair, and difficult to measure the electrochemical signal during the fretting wear process, etc.

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