Piston compressor and refrigeration system having the same

Patent metadata

Field	Value
Publication number	US-10309384-B2
Application number	US-201515503538-A
Country	US
Kind code	B2
Filing date	Jul 22, 2015
Priority date	Jul 17, 2015
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

A compressor and a refrigeration system having the same are provided. The compressor includes a crankcase, a thrust bearing and a crankshaft. The crankcase is formed with a crankshaft hole therein and provided with a mounting protrusion at an upper end thereof. The crankshaft hole runs upward through the mounting protrusion. The thrust bearing is fitted over the mounting protrusion. The crankshaft is rotatably disposed within the crankshaft hole, has a thrust part, and is formed with an oil supply passage therein. A lower end face of the thrust part is abutted against an upper end face of the thrust bearing. A cavity is defined by the mounting protrusion, the thrust bearing and the thrust part. A through hole is formed in a peripheral wall of the crankshaft for communicating the oil supply passage with the cavity.

First claim

What is claimed is:

1. A piston compressor, comprising:
a crankcase formed with a crankshaft hole therein and provided with a mounting protrusion at an upper end thereof, wherein the crankshaft hole runs upward through the mounting protrusion;
a thrust bearing fitted over the mounting protrusion;
a crankshaft rotatably disposed within the crankshaft hole, having a thrust part, and formed with an oil supply passage therein, wherein a lower end face of the thrust part is abutted against an upper end face of the thrust bearing,
wherein a cavity is defined by the mounting protrusion, the thrust bearing, and the thrust part, and a through hole is formed in a peripheral wall of the crankshaft for communicating the oil supply passage with the cavity.

2. The piston compressor according to claim 1 , wherein an upper end face of the mounting protrusion is higher than the upper end face of the thrust bearing in an axial direction of the crankshaft.

3. The piston compressor according to claim 2 , wherein the thrust part is formed with a groove in a lower surface thereof, and the groove is concaved upward and configured to overlie the mounting protrusion to form at least a part of the cavity.

4. The piston compressor according to claim 3 , wherein a top wall of the groove is higher than the upper end face of the mounting protrusion in the axial direction of the crankshaft.

5. The piston compressor according to claim 3 , wherein a horizontal projection of the groove has a shape of an annulus, in which a center of the annulus coincides with an axis of the crankshaft hole.

6. The piston compressor according to claim 3 , wherein a longitudinal projection of the groove has a shape of a taper, in which an opening of the taper faces toward the thrust bearing.

7. The piston compressor according to claim 1 , wherein the mounting protrusion is in clearance fit with the thrust bearing.

8. The piston compressor according to claim 1 , wherein the oil supply passage comprises an inclined segment, the inclined segment is formed within the crankshaft and inclined from an axis of the crankshaft toward the peripheral wall of the crankshaft, and the through hole is communicated with the inclined segment.

9. The piston compressor according to claim 8 , wherein the inclined segment is spirally inclined.

10. A refrigeration system, comprising a piston compressor, the piston compressor comprising:
a crankcase formed with a crankshaft hole therein and provided with a mounting protrusion at an upper end thereof, wherein the crankshaft hole runs upward through the mounting protrusion;
a thrust bearing fitted over the mounting protrusion;
a crankshaft rotatably disposed within the crankshaft hole, having a thrust part, and formed with an oil supply passage therein, wherein a lower end face of the thrust part is abutted against an upper end face of the thrust bearing,
wherein a cavity is defined by the mounting protrusion, the thrust bearing, and the thrust part, and a through hole is formed in a peripheral wall of the crankshaft for communicating the oil supply passage with the cavity.

11. The refrigeration system according to claim 10 , wherein an upper end face of the mounting protrusion is higher than the upper end face of the thrust bearing in an axial direction of the crankshaft.

12. The refrigeration system according to claim 11 , wherein the thrust part is formed with a groove in a lower surface thereof, and the groove is concaved upward and configured to overlie the mounting protrusion to form at least a part of the cavity.

13. The refrigeration system according to claim 12 , wherein a top wall of the groove is higher than the upper end face of the mounting protrusion in the axial direction of the crankshaft.

14. The refrigeration system according to claim 12 , wherein a horizontal projection of the groove has a shape of an annulus, in which a center of the annulus coincides with an axis of the crankshaft hole.

15. The refrigeration system according to claim 12 , wherein a longitudinal projection of the groove has a shape of a taper, in which an opening of the taper faces toward the thrust bearing.

16. The refrigeration system according to claim 10 , wherein the mounting protrusion is in clearance fit with the thrust bearing.

17. The refrigeration system according to claim 10 , wherein the oil supply passage comprises an inclined segment, the inclined segment is formed within the crankshaft and inclined from an axis of the crankshaft toward the peripheral wall of the crankshaft, and the through hole is communicated with the inclined segment.

18. The refrigeration system according to claim 17 , wherein the inclined segment is spirally inclined.

19. A piston compressor, comprising:
a crankcase formed with a crankshaft hole therein and provided with a mounting protrusion at an upper end thereof, wherein the crankshaft hole runs upward through the mounting protrusion;
a thrust bearing fitted over the mounting protrusion;
a crankshaft rotatably disposed within the crankshaft hole, having a thrust part integrally formed with the crankshaft, and formed with an oil supply passage therein, wherein a lower end face of the thrust part is abutted against an upper end face of the thrust bearing,
wherein a cavity is defined by the mounting protrusion, the thrust bearing, and the thrust part, and a through hole is formed in a peripheral wall of the crankshaft for communicating the oil supply passage with the cavity.

20. The piston compressor according to claim 19 , wherein the thrust part is formed with a groove in a lower surface thereof, and the groove is concaved upward and covers the mounting protrusion to form at least a part of the cavity.

Assignees

• Anhui meizhi compressor co ltd
• Midea Group Co Ltd

Inventors

• Yan Zhiqi
• Huang Gang

Classifications

• F04B39/0094

  crankshaft · CPC title

• F16C9/02

  Crankshaft bearings · CPC title

• F04B39/0284

  Constructional details, e.g. reservoirs in the casing (swash-plate compressors F04B27/0878, F04B27/109) · CPC title

• F16C2360/42

  Pumps with cylinders or pistons · CPC title

• F04B39/02

  Lubrication (of machines or engines in general F01M) · CPC title