Compressor Bearing

Abstract

A compressor may include a shell assembly, a first scroll, a second scroll, a driveshaft, and a bearing. The first scroll includes a first end plate and a first spiral wrap extending from the first end plate. The second scroll includes a second end plate and a second spiral wrap extending from the second end plate. The spiral wraps engage each other to form fluid pockets. The driveshaft may engage one of the scrolls. The bearing supports the driveshaft for rotation relative to the shell assembly. The bearing includes first and second axial ends and an aperture extending through the first and second axial ends. The driveshaft extends through the aperture. The aperture is defined by an inner diametrical surface of the bearing. The inner diametrical surface may include a tapered portion that extends radially outward as the tapered portion extends axially toward the first axial end of the bearing.

1 . A compressor comprising:
 a shell assembly;   a first scroll disposed within the shell assembly and including a first end plate and a first spiral wrap extending from the first end plate;   a second scroll including a second end plate and a second spiral wrap extending from the second end plate, wherein the first and second spiral wraps meshing engage each other to form moving fluid pockets therebetween;   a driveshaft drivingly engaging one of the first and second scrolls; and   a bearing supporting the driveshaft for rotation relative to the shell assembly,   wherein:
 the bearing includes a first axial end, a second axial end, and an aperture extending through the first and second axial ends, 
 the driveshaft extends through the aperture, 
 the aperture is defined by an inner diametrical surface of the bearing, 
 the inner diametrical surface including a tapered portion that extends radially outward as the tapered portion extends axially toward the first axial end of the bearing, and 
 the inner diametrical surface includes a straight portion disposed axially between the tapered portion and the second axial end of the bearing, wherein the tapered portion is angled relative to the straight portion. 
   
     
     
         2 . The compressor of  claim 1 , wherein the first axial end of the bearing is disposed axially between the second scroll and the second axial end of the bearing. 
     
     
         3 . (canceled) 
     
     
         4 . The compressor of  claim 2 , wherein the bearing is a bi-metal bearing. 
     
     
         5 . The compressor of  claim 4 , wherein the bearing includes an aluminum cladding. 
     
     
         6 . The compressor of  claim 1 , wherein the driveshaft includes a concentric portion and an eccentric crank pin extending from an axial end of the concentric portion. 
     
     
         7 . The compressor of  claim 6 , wherein the bearing supports the concentric portion, and wherein the eccentric crank pin is disposed axially between the bearing and the second end plate. 
     
     
         8 . The compressor of  claim 7 , further comprising another bearing supporting the concentric portion of the driveshaft. 
     
     
         9 . The compressor of  claim 1 , further comprising a motor assembly disposed within the shell assembly and drivingly engaging the driveshaft. 
     
     
         10 . The compressor of  claim 1 , further comprising a bearing housing fixed to the shell assembly, wherein the bearing is disposed within the bearing housing. 
     
     
         11 . A compressor comprising:
 a first scroll including a first end plate and a first spiral wrap extending from the first end plate;   a second scroll including a second end plate and a second spiral wrap extending from the second end plate, wherein the first and second spiral wraps meshing engage each other to form moving fluid pockets therebetween;   a driveshaft drivingly engaging the second scroll; and   a bearing housing assembly supporting the driveshaft for rotation, the bearing housing assembly including a fixed bearing housing and a bearing disposed within the bearing housing,   wherein:
 the bearing housing supports the second scroll, 
 the bearing includes a first axial end, a second axial end, and an aperture extending through the first and second axial ends, 
 the driveshaft extends through the aperture, 
 the aperture is defined by an inner diametrical surface of the bearing, and 
 the inner diametrical surface including a tapered portion that extends radially outward as the tapered portion extends axially toward the first axial end of the bearing. 
   
     
     
         12 . The compressor of  claim 11 , wherein the first axial end of the bearing is disposed axially between the second scroll and the second axial end of the bearing. 
     
     
         13 . The compressor of  claim 12 , wherein the inner diametrical surface includes a straight portion disposed axially between the tapered portion and the second axial end of the bearing, wherein the tapered portion is angled relative to the straight portion. 
     
     
         14 . The compressor of  claim 13 , wherein the driveshaft includes a concentric portion and an eccentric crank pin extending from an axial end of the concentric portion. 
     
     
         15 . The compressor of  claim 14 , wherein the bearing supports the concentric portion, and wherein the eccentric crank pin is disposed axially between the bearing and the second end plate. 
     
     
         16 . The compressor of  claim 15 , further comprising another bearing supporting the concentric portion of the driveshaft. 
     
     
         17 . The compressor of  claim 16 , wherein the bearing is a bi-metal bearing. 
     
     
         18 . The compressor of  claim 17 , wherein the bearing includes an aluminum cladding. 
     
     
         19 . The compressor of  claim 11 , further comprising a motor assembly drivingly engaging the driveshaft.