Sealed compressor

Abstract

A sealed compressor according to the present invention includes: an electric component ( 110 ) including a stator ( 114 ) and a rotor ( 116 ); a compression component ( 112 ); and a sealed container ( 102 ) configured to accommodate the electric component ( 110 ) and the compression component ( 112 ) and store lubricating oil ( 104 ). The compression component ( 112 ) includes: a shaft ( 118 ) including a main shaft section ( 120 ) and an eccentric shaft section ( 122 ); a cylinder block ( 124 ); a main bearing ( 126 ) provided at the cylinder block ( 124 ) and supporting the main shaft section ( 120 ); and a thrust rolling bearing ( 176 ) provided at a thrust surface ( 160 ) of the main bearing ( 126 ). The thrust rolling bearing ( 176 ) includes: a plurality of rolling elements ( 166 ) held by the cage ( 168 ); an upper race ( 164 ); and a lower race ( 170 ). A ring-shaped, flat, thin plate ( 180 ) is provided between the lower race ( 170 ) and the thrust surface ( 160 ) of the main bearing ( 16 ).

1 . A sealed compressor comprising:
 an electric component including a stator and a rotor;   a compression component driven by the electric component; and   a sealed container configured to accommodate the electric component and the compression component and store lubricating oil lubricating the compression component, wherein:   the compression component includes a shaft including a main shaft section and an eccentric shaft section, the rotor being fixed to the main shaft section,
 a cylinder block including a compression chamber, 
 a piston configured to perform a reciprocating movement in the compression chamber, 
 a coupling section coupling the piston and the eccentric shaft section, 
 a main bearing provided at the cylinder block and supporting the main shaft section, and 
 a thrust rolling bearing provided at a thrust surface of the main bearing; 
   the thrust rolling bearing includes an upper race, a lower race, a cage provided between the upper race and the lower race, and a plurality of rolling elements held by the cage;   a raceway groove constituted by ring-shaped grooves is provided at opposing main surfaces of the upper and lower races;   the rolling elements are arranged at the raceway groove of the upper and lower races; and   a ring-shaped, flat, thin plate is provided between the lower race and the thrust surface of the main bearing.   
     
     
         2 . The sealed compressor according to  claim 1 , wherein the thin plate is one of a plurality of thin plates provided between the lower race and the thrust surface of the main bearing. 
     
     
         3 . The sealed compressor according to  claim 1 , wherein the thin plate contains at least one metal selected from the group consisting of iron, copper, and aluminum. 
     
     
         4 . The sealed compressor according to  claim 1 , wherein a thickness of the thin plate is not more than one fifth of a thickness of the lower race. 
     
     
         5 . The sealed compressor according to  claim 1 , wherein a thickness of the thin plate is not less than 0.1 mm and not more than 0.2 mm. 
     
     
         6 . The sealed compressor according to  claim 1 , wherein flatness of a main surface, contacting the thrust surface, of the thin plate is lower than flatness of the thrust surface. 
     
     
         7 . The sealed compressor according to  claim 1 , wherein:
 a flange surface is provided at the shaft so as to be opposed to the other main surface of the upper race; and   the thin plate is provided between the flange surface of the shaft and the other main surface of the upper race.