Scroll-type volume displacement apparatus with an orbiting thrust bearing

Abstract

A scroll-type volume displacement apparatus with an orbiting thrust bearing. A scroll element of the first end plate in a fixed scroll engages with a scroll element of the second end plate in an orbiting scroll, the fixed scroll and the orbiting scroll are set in the main housing respectively. The purpose of the apparatus is to set the thrust ball bearing between the orbiting scroll and the base shell, which can orbit along the orbiting scroll, so as to balance the potential shake generated in the orbiting movement along the orbiting scroll through the multi-group thrust ball bearings. And, by the sealed contact between the orbiting scroll and the thrust ball bearing, the axial deviating force of the orbiting scroll can seal the pressure chamber to keep the slight contact of the front and behind face of the two scrolls which engages with each other.

What claimed is: 
     
         1 . A scroll-type volume displacement apparatus with an orbiting thrust bearing, comprises a main housing ( 20 ), a base shell ( 70 ), a fixed scroll ( 50 ) and an orbiting scroll ( 60 );
 wherein also comprises an orbiting trust bearing ( 172 ), said orbiting thrust bearing ( 172 ) is connected with a bearing block end plate ( 93 ) of said orbiting scroll by pins ( 95   a,    95   b ), said orbiting thrust bearing ( 172 ) orbits in a similar way to the orbiting scroll ( 60 ).   
     
     
         2 . A scroll-type volume displacement apparatus with an orbiting thrust bearing as claimed in  claim 1 , wherein said orbiting thrust bearing ( 172 ) sliding fits with said pins ( 95   a,    95   b ), said orbiting scroll ( 60 ) drives said orbiting thrust bearing ( 172 ) orbit by said pins ( 95   a,    95   b ). 
     
     
         3 . A scroll-type volume displacement apparatus with an orbiting thrust bearing as claimed in  claim 1 , wherein said orbiting scroll ( 60 ) contains a second end plate ( 61 ), a pressure chamber ( 83 ) forms between said orbiting thrust bearing ( 172 ) and said second end plate ( 61 ) of said orbiting scroll ( 60 ), the pressure of said pressure chamber ( 83 ) roles in said second end plate ( 61 ), and makes said orbiting scroll ( 60 ) orbit relatively to said fixed scroll ( 50 ). 
     
     
         4 . A scroll-type volume displacement apparatus with an orbiting thrust bearing as claimed in  claim 1 , wherein there is fixed thrust bearing between said second end plate ( 61 ) of said orbiting scroll ( 60 ) and said base shell ( 70 ), said fixed thrust bearing connects to said orbiting thrust bearing ( 172 ), which makes said fixed thrust bearing bear the axial thrust who bore by said orbiting thrust bearing ( 172 ) 
     
     
         5 . A scroll-type volume displacement apparatus with an orbiting thrust bearing as claimed in  claim 4 , wherein said fixed thrust bearing comprises fixed thrust ball bearing ( 104 ) and orbiting thrust ball bearing ( 102 ), said fixed thrust ball bearing ( 104 ) mounts on said base shell ( 70 ), said orbiting thrust ball bearing ( 102 ) roles in said fixed thrust ball bearing ( 104 ), at the same time, said orbiting thrust ball bearing ( 102 ) orbits in a similar way relatively to said fixed thrust ball bearing ( 104 ). 
     
     
         6 . A scroll-type volume displacement apparatus with an orbiting thrust bearing as claimed in  claim 5 , wherein said fixed thrust ball bearing ( 104 ) and said orbiting thrust ball bearing ( 102 ) bear the axial thrust of said orbiting thrust ball bearing ( 172 ).