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Thermal Analysis of Traction Contact Area Using a Thin-film Temperature Sensor
Abstract:
The purpose of this paper is to construct the thermal analysis model by measuring and estimating the temperature at the traction contact area. For measurement of temperature, we have used a thin-film temperature sensor. For estimation of temperature, we have composed the thermal analysis model.
The thin-film temperature sensor was formed on the contact surface using a spattering device. The sensor is constituted of three layers (sensor layer, insulation layer and intermediate layer). Dimensions of the sensor were sufficiently smaller than the traction contact area. The sensor featured high specific pressure capacity and high speed responsiveness.
The thermal analysis model was mainly composed of three equations: Carslaw & Jaeger equation, Rashid & Seireg equation and heat transfer equation of shear heating in oil film. The heat transfer equation involved two models (local shear heating model at middle plane, homogeneous shear heating model).
The accuracy of the thermal analysis model was verified by two methods. First, we measured the temperature individually by using several different shapes of the sensor. Second, we measured the temperature individually by using several different insulation layers' properties (thickness and thermal conductivity). As a result, the measured and estimated temperatures agreed closely.