Abstract:

In this paper, a new type of hydraulic executor, ball spire hydraulic rotary oscillating actuator is presented, and the dynamic optimal design theory and analysis method for the servo system of this new actuator are also built.In order to ensure good load performance, high efficiency, stationary transmission, and large torque output, a special structure consisting of the ball spire pair of multiple thread of large ascension angle, the ball spline pair, the ball discharge pair, the piston hydraulic cylinder, etc.is used.This actuator can be used in hydraulic systems of low, intermediate or heavy pressure.The calculating formula of the optimal design parameter for actuators is introduced, and the relationship between the optimal parameter, system efficiency and frequency band is analyzed.The system will consume least energy, and own highest efficiency and widest frequency, if its actuators is designed according to the above design theory.

Key words: ball ro tary-o scillat ing actuato r, hydraulic servo system, op t imal design