Test principle and measuring method of friction coefficient of drilling fluid lubrication tester

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Wang, Xiaojing^1

School of Mechanical Engineering, Anyang Institute of Technology, Anyang

455000, China^1

关键词: Armature currents;    Excitation currents;    Fluid lubrication;    Friction coefficients;    Measurement methods;    Motor armature currents;    Physical quantities;    Servo control systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/2/022039/pdf
DOI  :  10.1088/1755-1315/300/2/022039

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This paper introduces the test principle of the friction coefficient, and then introduces its measurement method, which provides a theoretical basis for the overall design of the tester. We propose the following scheme: design a set of DC pulse width modulation (PWM) servo control system with microprocessor as the control core. The whole system needs to detect four physical quantities: motor speed, motor armature current, excitation current and pressure. The current transformer is used to detect the armature current and excitation current of the motor, and the friction coefficient and film strength are converted by microprocessor to keep the excitation current constant. The speed sensor is used to detect the speed of the motor, the pressure sensor is used to detect the applied pressure, and the microprocessor is used to realize the automatic control of the speed.