基于分布式光纤测温的离合器摩擦表面温度场测量

An increase in the surface temperature of a clutch during engaging has a direct effect on the clutch-transmitted torque. Hence, studying the rise in clutch temperature is of great significance for improving clutch control and optimizing clutch design. However, the contacting surface of a friction lining is generally closed and the surface temperature is often difficult to measure accurately. To understand the high accuracy measurement of the clutch temperature, the latest internationally developed distributed optical fiber sensing technology was utilized to perform measurement tests on a dry clutch friction characteristic test rig that is designed in this study. The experimental results confirmed that compared with a traditional thermocouple measurement, the distributed optical fiber temperature measurement can obtain the temperature distribution along the radial direction of the frictional contact surface of the clutch and provide data for temperature field analysis of the clutch surface. Furthermore, an optical fiber measurement measures the temperature of various components within the clutch system. The measurement results of temperature changes for different radii, working conditions, and components confirm that the temperature distribution of the frictional contact surface of the clutch increases with an increase in the radius. Moreover, during a single engagement separation, the temperature rise of the two friction contact surfaces of the clutch friction plate differs, and the rate of temperature change of the side near the flywheel is higher than that of the pressure plate.