Reciprocating compressor

Abstract

A reciprocating compressor comprising a cylinder block ( 3 ) having formed therein a plurality of cylinders ( 11 ), a shaft rotatably passing through the cylinder block and pistons engaged in reciprocating movement inside the cylinders ( 11 ) as the shaft rotates, which is installed by fastening mounting leg parts ( 31 ) disposed at the cylinder block ( 3 ) at mounting positions, is characterized in that the mounting leg parts are each constituted with a connecting portion ( 31 a ) extending from the cylinder block 3 and a projected portion ( 31 b ) formed continuously to the connecting portion to project on one side or both sides of the connecting portion along the tightening direction and that the projected portion ( 31 b ) has a lower level of rigidity compared to the connecting portion ( 31 a ). The reciprocating compressor eliminates the need for rigorous management of the piston clearance by assuring firm installation via the mounting leg parts and also assuring smooth movement of the pistons with the extent of cylinder deformation kept within the allowable range.

1 . A reciprocating compressor comprising: 
 a cylinder block having formed therein a plurality of cylinders, a shaft rotatably passing through said cylinder block and pistons engaged in reciprocating movement inside said cylinders as said shaft rotates, which is installed by fastening mounting leg parts disposed at said cylinder block at mounting positions,    wherein said mounting leg parts are each constituted with a connecting portion extending from said cylinder block and a projected portion formed continuously to said connecting portion to project on one side or both sides of said connecting portion along the tightening direction; and    wherein said projected portion has a lower level of rigidity compared to said connecting portion so as to concentrate deformation occurring during installation into said projected portion.    
   
   
       2 . A reciprocating compressor comprising: 
 a cylinder block having formed therein a plurality of cylinders, a shaft rotatably passing through said cylinder block and pistons engaged in reciprocating movement inside said cylinders as said shaft rotates, which is installed by fastening mounting leg parts disposed at said cylinder block at mounting positions,    wherein said mounting leg parts are each constituted with a connecting portion extending from said cylinder block and a projected portion formed continuously to said connecting portion to project on one side or both sides of said connecting portion along the tightening direction; and    wherein the sectional area of said projected portion is set smaller than the sectional area of said connecting portion so as to concentrate deformation occurring during installation into said projected portion.    
   
   
       3 . A reciprocating compressor according to  claim 1 , wherein a bolt insertion hole at which a mounting bolt is inserted is formed at the center of each projected portion and the wall thickness of said connecting portion is not thinned out along a direction running perpendicular to said bolt insertion hole.  
   
   
       4 . (canceled)  
   
   
       5 . (canceled)  
   
   
       6 . A reciprocating compressor according to  claim 2 , wherein a bolt insertion hole at which a mounting bolt is inserted is formed at the center of each projected portion and the wall thickness of said connecting portion is not thinned out along a direction running perpendicular to said bolt insertion hole.  
   
   
       7 . A reciprocating compressor according to  claim 1 , wherein the external shape of said projected portion is cylindrical.  
   
   
       8 . A reciprocating compressor according to  claim 2 , wherein the external shape of said projected portion is cylindrical.  
   
   
       9 . A reciprocating compressor according to  claim 3 , wherein the external shape of said projected portion is cylindrical.  
   
   
       10 . A reciprocating compressor according to  claim 1 , wherein a bolt insertion hole at which a mounting bolt is inserted is formed at the center of each projected portion, with at least one projected portion disposed on one side or both sides of said connecting portion having a length along the axial direction set approximately equal to or greater than the internal diameter of said bolt insertion hole.  
   
   
       11 . A reciprocating compressor according to  claim 2 , wherein a bolt insertion hole at which a mounting bolt is inserted is formed at the center of each projected portion, with at least one projected portion disposed on one side or both sides of said connecting portion having a length along the axial direction set approximately equal to or greater than the internal diameter of said bolt insertion hole.  
   
   
       12 . A reciprocating compressor according to  claim 3 , wherein a bolt insertion hole at which a mounting bolt is inserted is formed at the center of each projected portion, with at least one projected portion disposed on one side or both sides of said connecting portion having a length along the axial direction set approximately equal to or greater than the internal diameter of said bolt insertion hole.  
   
   
       13 . A reciprocating compressor according to  claim 4 , wherein a bolt insertion hole at which a mounting bolt is inserted is formed at the center of each projected portion, with at least one projected portion disposed on one side or both sides of said connecting portion having a length along the axial direction set approximately equal to or greater than the internal diameter of said bolt insertion hole.