Analysis and Experimental Study on Temperature Rise of Screw Support Bearing
With the development of aerospace equipment towards high-speed,heavy-duty,high-precision and high reliability,the performance of screw transmission mechanisms used in aerospace equipment is also becoming increasingly high.This article takes the screw support bearing used in a certain aerospace device as the research object.Based on the mechanical analysis of the bearing,a local method is used to establish a bearing friction power consumption calculation model.Based on heat transfer theory,the optimized screw support bearing is analyzed for heat transfer,and a bearing temperature rise simulation analysis model is established to analyze the influence of load,speed and environmental temperature on the bearing temperature rise.A temperature rise test is designed for verification.The results show that the maximum error between the simulation results and the experimental results is 10.1％.The highest point of temperature rise in the bearing system is located at the contact position between the steel ball and the inner channel.The temperature rise of the bearing increases with the increase of load and speed,and also increases with the increase of environmental temperature.After optimization,the temperature of the outer ring of the bearing decreases by about 7 ℃ compared to before optimization.The research results of this article have certain reference value for the design and use of screw support bearings.
lead screw support bearingfriction power consumptionbearing parameter optimizationtemperature rise model
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