Multi-working condition simulation pipe inner wall friction and wear test device

Abstract

The invention relates to a friction and wear test device for the inner wall of a multi-working condition simulated pipe, which comprises a test base, a turntable and a tube to be tested. The tube to be tested is provided with an agitator for rotating and stirring the solution to simulate the sand wear on the inner wall of the tube. , the tube to be tested is provided with a hollow force applying lever, and the bottom end of the force applying lever is provided with a bearing steel ball that fits in contact with the inner wall of the tube to be tested. A voltage sensor that measures the resistance of the film layer on the inner wall of the tube and uses the voltage signal to characterize the wear of the film layer on the inner wall of the tube to be tested in real time. Gas with bubble disturbance effect. The invention can not only realize the friction and wear test of the inner wall of the pipe under conventional conditions, but also realize the friction and wear condition under the disturbance of liquid, sand or gas, and monitor the film in real time through the impedance change by adding a voltage between the film layer and the tube base layer wear.

Description

technical field [0001] The invention relates to the field, in particular to a friction and wear test device for simulating the inner wall of a pipe under multiple working conditions. Background technique [0002] In many coal chemical industry valves and connected pipelines, liquid-solid two-phase flow is ubiquitous. Due to the throttling effect of the flow channel in the valve, as well as changes in process parameters and operational fluctuations, the fluid medium is prone to gas-liquid phase transition locally, forming a high-speed gas-liquid-solid three-phase flow, which further aggravates the erosion of the pipeline wear and tear. At the same time, a large number of cavitation bubbles generated by the phase transition will collapse in the pressure recovery zone or strong disturbance zone in the flow field. When the collapsed position of the cavity is close to the wall, cavitation will occur and the loss of wall material will be accelerated. Depositing thin films on th...

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Problems solved by technology

For example: Chinese patent CN109540721A "an experimental device and method for studying the friction and wear of drill pipe and casing", which can simulate the friction between the drilling fluid and the casing during drilling, but it can only test the drilling The friction characteristics between the drill pipe and the casing under liquid conditions, the function is relatively simple

It is difficult to measure the friction and wear performance of the inner wall of the tube under the state of gas-liquid-solid three-phase flow by using the existing friction and wear testing machine. At the same time, it is not easy to observe the friction and wear process of the inner wall of the tube in real time

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