Radially compliant scroll compressor

Patent metadata

Field	Value
Publication number	US-9377022-B2
Application number	US-201314072920-A
Country	US
Kind code	B2
Filing date	Nov 6, 2013
Priority date	Jan 8, 2013
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A compressor may include a compression mechanism, a driveshaft, and a lever. The compression mechanism may include orbiting and non-orbiting scroll members meshingly engaging each other. The driveshaft may include an eccentric crank pin engaging the orbiting scroll member such that rotation of the driveshaft about a first axis causes orbital motion of the orbiting scroll relative to the non-orbiting scroll. The lever may be mounted for rotation with the driveshaft about the first axis and may be rotatable relative to the driveshaft about a second axis.

First claim

What is claimed is:

1. A compressor comprising:
a compression mechanism including orbiting and non-orbiting scroll members meshingly engaging each other;
a driveshaft having an eccentric crank pin engaging said orbiting scroll member such that rotation of said driveshaft about a first axis causes orbital motion of said orbiting scroll relative to said non-orbiting scroll; and
a lever mounted to said driveshaft for rotation with said driveshaft about said first axis, said lever rotatable coupled to said driveshaft by a pin that extends through an aperture in said lever such that said lever is rotatable about said pin relative to said driveshaft about a second axis that extends through said pin and is perpendicular to said first axis.

2. The compressor of claim 1 , wherein at least a portion of said lever is disposed between an unloader bushing and said eccentric crank pin in a radial direction.

3. The compressor of claim 2 , wherein said eccentric crank pin moves in a radial direction relative to said unloader bushing in response to rotation of said lever about said second axis.

4. The compressor of claim 1 , wherein said second axis extends through the eccentric crank pin.

5. The compressor of claim 1 , wherein a center of gravity of said lever is radially offset relative to said second axis.

6. The compressor of claim 1 , further comprising:
a first counterweight mounted for movement with said orbiting scroll member and producing a first counterforce that acts against an inertial force of said orbiting scroll member; and
a second counterweight mounted for movement with said orbiting scroll member and producing a second counterforce that acts against said inertial force of said orbiting scroll member,
wherein said lever is mounted between said first and second counterweights, and wherein movement of said lever transfers a first lever force onto said orbiting scroll, said first lever force acting substantially against said inertial force.

7. The compressor of claim 6 , wherein said second counterweight moves relative to said first counterweight and in an operating direction radially opposite to a direction of said inertial force of said orbiting scroll member during orbital motion of said orbiting scroll member.

8. The compressor of claim 6 , wherein said lever defines a first portion, a second portion and an intermediate portion, said intermediate portion being offset from a line passing through said first and second portions, wherein said lever is pivotally coupled to said second counterweight at said first portion.

9. The compressor of claim 8 , wherein movement of said second counterweight in an operating direction causes said second portion of said lever to impart a second lever force onto said eccentric drive pin, said second lever force acting substantially in said direction of said inertial force.

10. The compressor of claim 1 , further comprising a counterweight component mounted for radial movement relative to said orbiting scroll member and producing a counterforce that acts against said inertial force of said orbiting scroll member, wherein said lever is pivotally coupled to said counterweight and rotates upon radial movement of said counterweight to transfer a first lever force against said inertial force.

11. The compressor of claim 1 , wherein at least a portion of said lever is disposed between a hub of said orbiting scroll and said eccentric pin in a radial direction.

12. The compressor of claim 1 , wherein at least a portion of said lever is disposed within a groove formed in said driveshaft.

13. The compressor of claim 12 , wherein the groove is formed in the eccentric crank pin.

14. The compressor of claim 13 , wherein the groove extends into a concentric portion of the driveshaft.

15. The compressor of claim 14 , wherein said lever includes a generally vertically extending portion and a generally horizontally extending portion, wherein said horizontally extending portion extends radially out of said groove, and wherein said vertically extending portion is disposed radially between said driveshaft and a bearing supporting the driveshaft for rotation about said first axis.

16. A compressor comprising:
a compression mechanism including orbiting and non-orbiting scroll members meshingly engaging each other;
a driveshaft having an eccentric crank pin engaging said orbiting scroll member such that rotation of said driveshaft about a first axis causes orbital motion of said orbiting scroll relative to said non-orbiting scroll; and
a lever mounted for rotation with said driveshaft about said first axis and rotatable relative to said driveshaft about a second axis,
wherein at least a portion of said lever is disposed between a hub of said orbiting scroll and said eccentric pin in a radial direction.

17. The compressor of claim 16 , wherein at least a portion of said lever is disposed between an unloader bushing and said eccentric crank pin in a radial direction.

18. The compressor of claim 17 , wherein said eccentric crank pin moves in a radial direction relative to said unloader bushing in response to rotation of said lever about said second axis.

19. The compressor of claim 16 , wherein at least a portion of said lever is disposed within a groove formed in said driveshaft.

20. The compressor of claim 19 , wherein the groove is formed in the eccentric crank pin.

21. The compressor of claim 20 , wherein the groove extends into a concentric portion of the driveshaft.

22. The compressor of claim 21 , wherein said lever includes a generally vertically extending portion and a generally horizontally extending portion, and wherein said horizontally extending portion extends radially out of said groove.

23. The compressor of claim 22 , wherein said vertically extending portion is disposed radially between said driveshaft and a bearing supporting the driveshaft for rotation about said first axis.

24. The compressor of claim 16 , wherein said second axis extends through the eccentric crank pin.

25. The compressor of claim 16 , wherein a center of gravity of said lever is radially offset relative to said second axis.

26. A compressor comprising:
a compression mechanism including orbiting and non-orbiting scroll members meshingly engaging each other;
a driveshaft having an eccentric crank pin engaging said orbiting scroll member such that rotation of said driveshaft about a first axis causes orbital motion of said orbiting scroll relative to said non-orbiting scroll; and
a lever mounted for rotation with said driveshaft about said first axis and rotatable relative to said driveshaft about a second axis,
wherein at least a portion of said lever is disposed within a groove formed in said driveshaft.

27. The compressor of claim 26 , wherein the groove is formed in the eccentric crank pin.

28. The compressor of claim 27 , wherein the groove extends into a concentric portion of the driveshaft.

29. The compressor of claim 28 , wherein said lever includes a generally vertically extending portion and a generally horizontally extending portion, and wherein said horizontally extending portion extends radially out of said groove.

30. The compressor of claim 29 , wherein said vertically extending portion is disposed radially between said driveshaft and a bearing supporting the driveshaft for rotation about said first ax

Assignees

• Emerson Climate Technologies

Inventors

• Ignatiev Kirill M
• Xiaogeng Su
• Qingfeng Sun
• Tao Ye

Classifications

• F04C29/0021

  Systems for the equilibration of forces acting on the pump (interstice adjustment other than by fluid pressure F01C21/102) · CPC title

• F01C1/0215

  where only one member is moving · CPC title

• F04C2240/60

  Shafts · CPC title

• F04C29/0057 Primary

  for eccentric movement · CPC title

• F04C2240/807

  Balance weight, counterweight · CPC title