HYDRAULIC CONTROL VALVE FOR ROTARY SERVO-MECHANISM

摘要

A hydraulic control valve for rotary servo-actuating mechanism which is constructed with an annular casing, an input shaft provided in the annular casing and having individual oil passages respectively connected to an oil feeding source and a discharge oil vessel, and an output shaft integrally formed with a rotor, wherein the inner surface of of the annular casing and the outer surface of the rotor are shaped to define a plurality of oil chambers in conjunction with partition walls provided on the annular casing and the rotor. Oil passages are provided in the rotor communicating with the inner surface thereof toward the input shaft. A sleeve is provided between the shafts. Long grooves are provided on the outer surface of the input shaft or in the sleeve oblique relative to the center axis of the shaft, and ports are provided in the sleeve or the shaft, respectively. Relative sliding motion between the sleeve and inner shaft or relative rotational movement therebetween act to control the flow of fluid.