Hermetic compressor

Abstract

A hermetic compressor includes: a hermetic container having an oil sump defined in a bottom thereof; a frame arranged in the hermetic container and including a hollow portion; a rotating shaft rotatably inserted in the frame to penetrate through the hollow portion, the rotating shaft having an oil channel array to guide oil upward from the oil sump; and a thrust bearing inserted in a bearing installation groove, which is formed around an upper end of the hollow portion of the frame. The thrust bearing is configured to come into rolling contact with the rotating shaft to support an axial load of the rotating shaft, and the oil channel array is configured to supply at least a portion of the oil to the thrust bearing.

1 . A hermetic compressor, comprising: 
 a hermetic container having an oil sump defined in a bottom thereof;    a frame arranged in the hermetic container and including a hollow portion;    a rotating shaft rotatably inserted in the frame to penetrate through the hollow portion, the rotating shaft having an oil channel array configured to guide oil upward from the oil sump; and    a thrust bearing inserted in a bearing installation groove, which is formed around an upper end of the hollow portion, the thrust bearing coming into rolling contact with the rotating shaft to support an axial load of the rotating shaft,    wherein the oil channel array is configured to supply at least a portion of the oil to the thrust bearing.    
   
   
       2 . The hermetic compressor according to  claim 1 , wherein: 
 the rotating shaft includes, 
 a main shaft section penetrating through the hollow portion to protrude downward from the hollow portion,  
 an eccentric shaft section formed above the main shaft section and aligned eccentric to the main shaft section, and  
 a weight balance section interposed between the eccentric shaft section and the main shaft section to compensate for an unbalanced rotating motion of the rotating shaft due to the eccentric shaft section, both the eccentric shaft section and the weight balance section forming an eccentric part of the rotating shaft, and the oil channel array includes,  
 a first oil channel formed in a lower end portion of the main shaft section around a lower end of the hollow portion,  
 a second oil channel formed at an outer circumferential surface of the main shaft section facing the hollow portion beneath the thrust bearing to communicate with the first oil channel,  
 a third oil channel extending in an upper end portion of the main shaft section and the eccentric part at a location adjacent to the thrust bearing, and  
 a branch channel radially extending from the third oil channel to the outer circumferential surface of the main shaft section to deliver at least a first quantity of the at least a first portion of the oil passing through the third oil channel to the thrust bearing.  
   
   
   
       3 . The hermetic compressor according to  claim 2 , wherein: 
 the branch channel has a linear hole shape,    the third oil channel is eccentric to a center axis of the main shaft section, and    the branch channel extends in a direction intersecting with a line that connects a center axis of the main shaft section and the third oil channel to each other.    
   
   
       4 . The hermetic compressor according to  claim 3 , wherein the branch channel is inclined so that an entrance of the branch channel located at the third oil channel is lower than an exit of the branch channel located at the outer circumferential surface of the main shaft section.  
   
   
       5 . The hermetic compressor according to  claim 3 , wherein the branch channel is tapered so that a diameter of the branch channel decreases from an entrance of the branch channel located at the third oil channel to an exit of the branch channel located at the outer circumferential surface of the main shaft section.  
   
   
       6 . The hermetic compressor according to  claim 2 , wherein: 
 the branch channel has a linear hole shape,    the third oil channel is eccentric to a center axis of the main shaft section, and    the branch channel is formed from the outer circumferential surface of the main shaft section via a punching process.    
   
   
       7 . A hermetic compressor, comprising: 
 a hermetic container in which an oil sump is located;    a frame arranged at the hermetic container, the frame including a hollow portion;    a rotating shaft configured to be inserted into the frame;    at least one oil channel configured to guide oil from the oil sump;    a thrust bearing configured to contact the rotating shaft to support a load of the rotating shaft,    wherein the at least one oil channel is configured to supply at least a portion of the oil to the thrust bearing.    
   
   
       8 . The hermetic compressor according to  claim 7 , wherein the rotating shaft is configured to penetrate through at least a part of the hollow portion.  
   
   
       9 . The hermetic compressor according to  claim 7 , wherein the at least one oil channel includes a plurality of oil channels which form an oil channel array.  
   
   
       10 . The hermetic compressor according to  claim 7 , wherein the rotating shaft includes: 
 a main shaft section configured to penetrate through at least a part of the hollow portion;    an eccentric shaft section configured to be positioned above the main shaft section in an eccentric alignment with the main shaft section; and    a weight balance section configured to compensate for an unbalanced rotating motion of the rotating shaft.