Frictional Characteristics of a Small Aerostatic Linear Bearing

Lubricants

Ryosuke Araki²  Akihiro Takita²  Prin Nachaisit³  Dong-Wei Shu⁴  Yusaku Fujii²  Romeo P. Glovnea¹ 

[1] School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan;;School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan; E-Mails:;Faculty of Engineering, Rajamangala University of Technology Isan, No. 744 Suranarai Road, Muang, Nakhon Ratchasima 30000, Thailand; E-Mail:;School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; E-Mail:

关键词: air bearing;    aerostatic bearing;    pneumatic bearing;    inertial force;    inertia mass;    optical interferometer;   

DOI  :  10.3390/lubricants3020132

来源: mdpi

【 摘 要 】

Frictional characteristics of a small aerostatic linear bearing are accurately evaluated by means of a method, in which the force acting on the moving part of the bearing is measured as the inertial force. An optical interferometer is newly developed to measure the Doppler shift frequency of the laser light reflected on the small moving part. From the measured time-varying Doppler shift frequency, the velocity, the position, the acceleration and the inertial force of the moving part are numerically calculated. It is confirmed that the dynamic frictional force acting inside the bearing is almost proportional to the velocity of the moving part and is similar to the theoretical value calculated under the assumption that the flow inside the bearing is the Couette flow.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.