device for the production of series of pressure pulse and method of production of the series of movements and rotational lineaires

摘要

Linear or rotary vibrations are produced by hydraulic forces in servo-motors, by feeding to the hydraulic servo-motors a series of hydraulic pressure in pulses. This is done by connecting rapidly and alternately a pipe leading to the servo-motor to the hydraulic pressure and return pipes. Where th servo-motor is double-acting, the pressure impulses can be applied to the opposite sides of the motor in antiphase. At each changeover, a quantity of oil under pressure can be fed to the servo-motor slightly large than that discharged to the return pipe. The actual pressure can be varied during an impulse, so that the amplitude of the vibrations can be controlled.