叶冠涂层材料接触刚度和微动磨损实验

Experiments of contact stiffness and fretting wear on coating material of blade shroud

采用能够测量由接触表面微动所导致迟滞现象的实验装置,对带有涂层材料的不同接触方式的实验件进行了接触刚度和微动磨损测试.通过接触刚度测试,研究了激振力幅值、激振频率和接触正压力对接触刚度的影响;通过微动磨损分析,研究接触方式和载荷条件接触表面形态的改变,以及工作时间对接触刚度的影响.通过分析和总结实验结果,阐述了干摩擦阻尼结构微动磨损的防护措施,为提高航空发动机结构部件的可靠性提供一定的理论依据和技术支持.

The experimental facilities, which could be used to measure the hysteresis curve caused by fretting during contact surface, were adopted in order to test the contact stiffness and fretting wear of the test pieces with the coating material under different contact styles. The contact stiffness test results indicate the im- pact of vibration force amplitude and frequency as well as contact pressure on the contact stiffness; the fretting wear test results manifest the influence on the contact stiffness when contact styles and loading conditions on the contact surface vary under different working hours. After analyzing the test results, the protective measures against fretting wear of dry friction damping structures were proposed, contributing to enhance the aero-engine reliability and offer the theoretical basis and technical support.