FRICTION AND WEAR TEST DEVICE OF LINEAR ULTRASONIC MOTOR AND EXPERIMENTAL STUDIES
Linear ultrasonic motors are known for their various advantages such as direct actuating, stepping and servo working, as well as excellent controllable performance. Hence, linear ultrasonic motors are becoming increasingly important in the studying field of ultrasonic motors around the world. As the output characteristics of ultrasonic motors are directly influenced by the friction characteristic and wear of the interface between stator and promoter, tribological research between stator and promoter of the linear ultrasonic motor is of great significance. This paper introduced the improvements of the friction and wear test device for linear ultrasonic motors - realization of temperature and humidity control. Through this device, the relationship between the wearing rate of stator driving foot and temperature, humidity was studied. Furthermore, wearing capacity of friction pair was tested by electronic analytical balance and wear rate was calculated; Using a force transducer and DAQ Card to collect the preloadand the output force, friction coefficient between stator and promoter was obtained. The driving foot of stator and promoter used in the test were made of 45 steel and alumina ceramic respectively. Test results show that friction coefficient increases (decrease) with temperature (humidity) rise. With the temperature (humidity) rise, the wear rate of the stator decreases first and increases later. The wear mechanisms of the ceramic are brittle flaking off and fatigue wear. When the temperature and humidity is low, abrasive wear is the major reason of stator wearing.
Linear ultrasonic motor Friction and wear apparatus Temperature Humidity Friction coefficient Wear rate
Wen-tao ZHAO Zhi-yuan YAO Xiao-nan WANG Zhao-feng GE Sheng-li Zhou
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 250016, China
国际会议
深圳
英文
68-72
2011-12-09（万方平台首次上网日期，不代表论文的发表时间）