【摘要】 随着航天装备向高速、重载、高精度、高可靠性方面发展，要求航天装备用丝杠传动机构的性能也越来越高。以某航天装置用丝杠支撑轴承为研究对象，在轴承力学分析的基础上，采用局部法，建立轴承摩擦功耗计算模型，基于传热学理论，对优化后丝杠支撑轴承进行传热分析，建立轴承温升仿真分析模型，分析载荷、转速以及环境温度对轴承温升的影响规律，并设计温升试验进行验证。结果表明：仿真结果与试验结果的最大误差为10.1%,轴承温升最高点位于钢球与内沟道接触位置，轴承温升随着载荷、转速的增大而增大，随着环境温度的升高而增大，优化后轴承外圈温度比优化前降低7℃左右。该研究结果对丝杠支撑轴承的设计、使用具有一定参考价值。更多还原

【Abstract】 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.更多还原