Rotating fluid machine

Abstract

A rotary valve of a rotating fluid machine includes a moving valve plate disposed on a rotor, a stationary valve plate which is disposed on a valve body engaged with a rear cover to be unable to rotate and movable in the direction of the axis of the rotor, the two plates being brought into contact with each other on sliding faces orthogonal to the axis. Three engaging pins are planted on the inner face of the rear cover so as to surround the axis in parallel to the axis. The engaging pins are slidably fitted into pin holes formed in a back face of the valve body. This configuration enables the valve body to move in the direction of the axis to bring the sliding faces into close contact with each other, and enables the valve body to oscillate around the axis, thereby enhancing the compliance of the sliding faces and preventing leakage of a working medium.

What is claimed is:  
     
         1 . A rotating fluid machine comprising: 
 a casing;    a rotor rotatably supported by the casing;    a working section disposed on the rotor; and    a rotary valve, provided between the casing and the rotor, for controlling the supply and discharge of a working medium to and from the working section,    the rotary valve being constructed by bringing, into contact on sliding faces which are orthogonal to an axis of the rotor, a moving valve plate provided on the rotor and a stationary valve plate provided on a valve body engaged with the casing to be unable to rotate and movable in the direction of the axis,    wherein a plurality of engaging pins are projectingly provided in parallel to the axis on the inner face of the casing so as to surround the axis, and the engaging pins are slidably fitted into pin holes formed in a back face of the valve body.