High temperature and high pressure in-situ fretting wear test device

Abstract

The invention relates to a fretting wear test device, in particular to a high temperature and high pressure in-situ fretting wear test device, and solves the problems that in-situ fretting wear is difficult to realize at a high temperature and a high pressure; fretting amplitude and frequency are difficult to control accurately; electrochemical signals are hard to measure during fretting wear. The fretting wear test device is provided with a vibration exciter, a thermocouple, a working electrode / auxiliary electrode seat, an autoclave cover, a hydraulic cylinder, an autoclave body, an upright, a positioning plate, a first sample holding and loading device, a moving shaft, an upper linear guideway, a working electrode, a moving shaft guide bracket, an auxiliary electrode, a connecting nut I, a reference electrode seat, a reference electrode, a lower linear guideway, an upper guide platform plate, an upper guide rod, a lower guide rod, a lower guide platform plate and a connecting nut II. The device is capable of performing in-situ fretting wear on the surface of a sample at a high temperature and a high pressure. The reference electrode, the working electrode and the auxiliary electrode mounted on an autoclave work with an electrochemical workstation to detect the electrochemical signals during fretting wear.

Description

technical field [0001] The invention relates to a fretting wear test device, in particular to a high temperature and high pressure in-situ 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 generator heat transfer tubes. In-depth ...

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 fretting wear test device to solve the problems in the prior art that in-situ fretting wear is difficult to achieve under high temperature and high pressure, and the electrochemical signal is difficult to measure during the fretting wear process.

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