Device and method for measuring friction coefficient under high temperature environment

Abstract

The invention provides a device and method for measuring a friction coefficient under a high temperature environment. Before the experiment, a material to be measured is firstly manufactured into a test piece I and a test piece II, the test piece I is fixed at one end of a transmission shaft, the test piece II is fixed at the upper end of a knockout pin, the test piece I and the test piece II are mutually extruded and are both put in a high temperature box; during the experiment, a power supply of the high temperature box is switched on, the temperature in the box rises gradually, the test piece I rotates at a constant speed under the driving of the transmission shaft; the transmission shaft is connected with a torque sensor and a speed regulating electric motor via a shaft coupler; the torque which is applied to the test piece I by the transmission shaft is read by the torque sensor, and in accordance with torque balance, the frictional force applied to the test piece I by the test piece II can be measured; and a jack and a pressure sensor are sequentially arranged at the lower end of the knockout pin, the positive pressure of the test piece II to the test piece I can be calculated according to the reading of the pressure sensor, so the friction coefficient mu can be calculated in accordance with the formula of frictional force mu=f / N. Through the method provided by the invention, the problem of measuring the friction coefficient under a high temperature environment is solved.

Description

technical field [0001] The invention relates to a friction coefficient measuring device and a measuring method in a high-temperature environment, belonging to the technical field of mechanics and measurement. Background technique [0002] In the fields of aerospace, energy and power, it is necessary to develop different new materials to adapt to various harsh environments, especially in high-temperature environments. The friction coefficient between layers is related to temperature, and its parameters are very important for thermal stress calculations. The coefficient measuring instrument is of great significance for testing the high temperature performance of products. At present, most of the instruments used in China to measure the friction coefficient can only be measured below 300°C, and cannot measure the friction coefficient at higher temperatures. Contents of the invention [0003] The object of the present invention is to propose a measuring device and a measuring...

AI Technical Summary

Problems solved by technology

At present, most of the instruments used to measure the friction coefficient in China can only be measured below 300°C, and cannot measure the friction coefficient at higher temperatures.

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