Compressor Having Counterweight

Abstract

A compressor may include a compression mechanism, a motor, and a counterweight assembly. The motor assembly is drivingly engaged to the compression mechanism and includes a rotor driving a driveshaft. The rotor drives the driveshaft. The counterweight assembly is mounted axially onto the driveshaft of the motor assembly and has a first laminated stack of plates that includes a plurality of first plates and a plurality of second plates. Each first plate defines a first polygonal-shaped aperture that has a plurality of sides. Each second plate defines a second polygonal-shaped aperture that has a plurality of second sides. The first sides of the first polygonal-shaped apertures are rotationally misaligned with the second sides of the second polygonal-shaped apertures.

What is claimed is: 
     
         1 . A compressor comprising:
 a compression mechanism;   a motor assembly drivingly engaged to the compression mechanism, the motor assembly including a rotor and a driveshaft, the rotor driving the driveshaft; and   a counterweight assembly mounted axially onto the driveshaft of the motor assembly, the counterweight assembly having a first laminated stack of plates including a plurality of first plates and a plurality of second plates, each first plate defining a first polygonal-shaped aperture having a plurality of first sides, each second plate defining a second polygonal-shaped aperture having a plurality of second sides,   wherein the first sides of the first polygonal-shaped apertures are rotationally misaligned with the second sides of the second polygonal-shaped apertures.   
     
     
         2 . The compressor of  claim 1 , wherein the plurality of first and second plates are attached to each other by fasteners. 
     
     
         3 . The compressor of  claim 1 , wherein each of the first plates is disposed directly adjacent to at least one of the second plates. 
     
     
         4 . The compressor of  claim 1 , wherein the counterweight assembly includes a unitary counterweight attached to the first laminated stack of plates. 
     
     
         5 . The compressor of  claim 4 , wherein the unitary counterweight is formed from a different material than the plurality of first and second plates. 
     
     
         6 . The compressor of  claim 1 , wherein the counterweight assembly includes a second laminated stack of plates mounted axially onto the driveshaft and attached to the first laminated stack of plates, and wherein a U-shaped recess is formed in the second laminated stack of plates. 
     
     
         7 . The compressor of  claim 6 , wherein a solid body is contained in the U-shaped recess formed in the second laminated stack of plates. 
     
     
         8 . The compressor of  claim 7 , wherein the solid body is made up of a different material than the plurality of first and second plates. 
     
     
         9 . The compressor of  claim 1 , wherein the counterweight assembly includes a second U-shaped laminated stack of plates attached to the first laminated stack of plates. 
     
     
         10 . The compressor of  claim 9 , wherein a recess is formed in the second U-shaped laminated stack of plates. 
     
     
         11 . The compressor of  claim 1 , wherein the first laminated stack of plates are attached to the rotor. 
     
     
         12 . The compressor of  claim 1 , wherein the counterweight assembly includes a laminated stack of rings attached to the first laminated stack of plates. 
     
     
         13 . A compressor comprising:
 a compression mechanism;   a motor assembly drivingly engaged to the compression mechanism, the motor assembly including a rotor and a driveshaft, the rotor driving the driveshaft; and   first and second counterweight assemblies mounted axially onto the driveshaft with the rotor disposed therebetween, each of the first and second counterweight assemblies having a first laminated stack of plates including a plurality of first plates and a plurality of second plates, each first plate defining a first polygonal-shaped aperture having a plurality of first sides, each second plate defining a second polygonal-shaped aperture having a plurality of second sides,   wherein the first sides of the first polygonal-shaped apertures are rotationally misaligned with the second sides of the second polygonal-shaped apertures.   
     
     
         14 . The compressor of  claim 13 , wherein edges of the first plates are misaligned with edges of the second plates. 
     
     
         15 . The compressor of  claim 13 , wherein edges of the first plates are aligned with edges of the second plates. 
     
     
         16 . The compressor of  claim 13 , wherein each of the first plates is disposed directly adjacent to at least one of the second plates. 
     
     
         17 . The compressor of  claim 13 , wherein the first counterweight assembly includes a unitary counterweight attached to the first laminated stack of plates. 
     
     
         18 . The compressor of  claim 13 , wherein the first counterweight assembly includes a second laminated stack of plates mounted axially onto the driveshaft and attached to the first laminated stack of plates, and wherein a U-shaped recess is formed in the second laminated stack of plates. 
     
     
         19 . The compressor of  claim 18 , wherein a solid body is contained in the U-shaped recess formed in the second laminated stack of plates, and wherein the solid body is made up of a different material than the plurality of first and second plates. 
     
     
         20 . The compressor of  claim 13 , wherein the first counterweight assembly includes a second U-shaped laminated stack of plates attached to the first laminated stack of plates, and wherein a U-shaped recess is formed in the second U-shaped laminated stack of plates. 
     
     
         21 . The compressor of  claim 13 , wherein the first counterweight assembly and the second counterweight assembly are attached to the rotor. 
     
     
         22 . The compressor of  claim 13 , wherein the first counterweight assembly includes a laminated stack of rings attached to the first laminated stack of plates.