关键词: 低摩擦气缸, 单向阀, 换向, 气浮轴承

Abstract: Abstract： In order to study the working condition of the bearing in the commutation process of the air bearing based lowfriction cylinder, the mathematical model of the commutation was established based on the theory of charging, releasing process of fixedvolume chamber and the leakage model of the air bearing. The characteristic values, the commutation time and the pressure fluctuation ratio were proposed in theoretical analysis and simulated base on Matlab. The simulation result shows that the inner chamber of the piston has a pressure keeping effect in the commutation process, and as the commutation process quickens, the pressure fluctuation ratio decreases. A test bench was set up to further study of the commutation characteristics. The experimental results confirmed the simulation result, and proved that with this design the cylinder could achieve a smooth commutation. The experiment data with different additional chamber can also provide reference for the best commutating time.

Key words: Key words： lowfriction cylinder, check valve, commutation, air bearing