Rotary Piston Type Actuator with Hydraulic Supply

摘要

A rotary actuator includes a housing defining a first arcuate chamber comprising a cavity, a fluid port in fluid communication with the cavity, and an open end. A rotor assembly in the housing includes an output shaft and a rotor arm extending radially outward from the output shaft. An arcuate-shaped piston is disposed in the housing for movement in the arcuate chamber. The rotary actuator includes a fluid line is coupled to the fluid port, a high pressure fluid line, a low pressure fluid line, and a central pressure source coupled to the high pressure fluid line. A servo valve is positioned between the central pressure source and the hydraulic actuator and is controllable to selectively connect the fluid line to the high pressure fluid line and the low pressure fluid line to control movement of the hydraulic actuator.

主权项

1. A rotary actuator system comprising:
a first housing defining a first arcuate chamber comprising a first cavity, a first fluid port in fluid communication with the first cavity, and an open end; a rotor assembly rotatably journaled in said first housing and comprising a rotary output shaft and a first rotor arm extending radially outward from the rotary output shaft; an arcuate-shaped first piston disposed in said first housing for reciprocal movement in the first arcuate chamber through the open end, wherein a first seal, the first cavity, and the first piston define a first pressure chamber, and a first portion of the first piston contacts the first rotor arm; a first fluid line coupled to the first fluid port; a high pressure fluid line; a low pressure fluid line; a central pressure source coupled to the high pressure fluid line; and a servo valve positioned between the central pressure source and the hydraulic actuator and being controllable to selectively connect the first fluid line to the high pressure fluid line and the low pressure fluid line to control movement of the hydraulic actuator.