Thrust receiving mechanism

Abstract

Disclosed is a thrust receiving mechanism that makes it difficult for a fluid in a high-pressure space to leak to a low-pressure space side. A thrust receiving mechanism is provided on a back surface of a movable scroll that slides relative to a fixed scroll while rotating eccentrically, and is configured for generating a dynamic pressure on the back surface of the movable scroll, and the thrust receiving mechanism includes a dynamic pressure generation portion including a first groove communicating with a low-pressure side, and a second groove communicating with a buffer space between a radial inner end and a radial outer end of the thrust receiving mechanism.

1 . A thrust receiving mechanism provided on a back surface of a movable scroll that is configured to slide relative to a fixed scroll while rotating eccentrically, and configured for generating a dynamic pressure on the back surface of the movable scroll, comprising:
 a dynamic pressure generation portion including a first groove communicating with a low-pressure side, and a second groove communicating with a buffer space between a radial inner end and a radial outer end of the thrust receiving mechanism.   
     
     
         2 . The thrust receiving mechanism according to  claim 1 ,
 wherein the buffer space is a depression.   
     
     
         3 . The thrust receiving mechanism according to  claim 2 ,
 wherein the depression communicates with the low-pressure side.   
     
     
         4 . The thrust receiving mechanism according to  claim 1 ,
 wherein each of the dynamic pressure generation portions has a diameter smaller than a diameter of the thrust receiving mechanism, and the dynamic pressure generation portions are disposed at equal spacings in a circumferential direction of the thrust receiving mechanism.   
     
     
         5 . The thrust receiving mechanism according to  claim 2 ,
 wherein each of the dynamic pressure generation portions has a diameter smaller than a diameter of the thrust receiving mechanism, and the dynamic pressure generation portions are disposed at equal spacings in a circumferential direction of the thrust receiving mechanism.   
     
     
         6 . The thrust receiving mechanism according to  claim 3 ,
 wherein each of the dynamic pressure generation portions has a diameter smaller than a diameter of the thrust receiving mechanism, and the dynamic pressure generation portions are disposed at equal spacings in a circumferential direction of the thrust receiving mechanism.