Rotary compressor with vane slot disposed at predetermined tilting angle

Patent metadata

Field	Value
Publication number	US-11225970-B2
Application number	US-202016838227-A
Country	US
Kind code	B2
Filing date	Apr 2, 2020
Priority date	May 24, 2019
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A rotary compressor may include a rotary shaft; a plurality of plates that supports the rotary shaft; a cylinder provided between the plurality of plates to define a compression space, and provided with a vane slot; a roller slidably coupled to the rotary shaft inside of the cylinder, and having a hinge groove on an outer circumferential surface of the roller; and a vane, a first end of which is slidably coupled to the vane slot of the cylinder, and a second end of which is rotatably coupled to the hinge groove of the roller. When an imaginary line passing through an axial center of the rotary shaft and a hinge center of the vane is a first center line, and a radial center line of the vane slot passing through the hinge center of the vane is a second center line, the vane slot is disposed such that the second center line is intersected by a predetermined tilting angle with respect to the first center line. With this structure, a roller reaction force is canceled to suppress an increase in side pressure or side wear between a vane and a vane slot into which the vane is inserted.

First claim

What is claimed is:

1. A rotary compressor, comprising:
a rotary shaft;
a plurality of plates that supports the rotary shaft;
a cylinder provided between the plurality of plates to define a compression space, and provided with a vane slot;
a roller slidably coupled to the rotary shaft inside of the cylinder, and disposed with a hinge groove on an outer circumferential surface of the roller; and
a vane, a first end of which is slidably coupled to the vane slot of the cylinder, and a second end of which is rotatably coupled to the hinge groove of the roller, wherein when an imaginary line passing through an axial center of the rotary shaft and a hinge center of the vane is a first center line, and a radial center line of the vane slot passing through the hinge center of the vane is a second center line, the vane slot is disposed such that the second center line is intersected by a predetermined tilting angle with respect to the first center line, wherein a wear avoiding portion or a dimple having a predetermined depth is disposed on at least one end surface of end surfaces of the roller facing the plurality of plates, and wherein the wear avoiding portion is defined by chamfering an outer circumferential edge of the roller adjacent the hinge groove, and the dimple is disposed between an inner circumferential edge and an outer circumferential edge of the roller adjacent the hinge groove.

2. The rotary compressor of claim 1 , wherein the vane slot is disposed such that the second center line has an angle of ±30° with respect to a maximum roller reaction force direction transmitted to the vane.

3. The rotary compressor of claim 2 , wherein the vane slot is disposed such that the second center line corresponds to the maximum roller reaction force direction transmitted to the vane.

4. The rotary compressor of claim 1 , wherein the compression space is divided into a suction side and a discharge side with the vane interposed therebetween, and wherein an inner end of the vane slot faces the discharge side, and an outer end of the vane slot is tilted with respect to the first center line to face the suction side.

5. The rotary compressor of claim 4 , wherein the vane and the hinge groove are symmetrical with respect to the second center line.

6. The rotary compressor of claim 4 , wherein at least one of the vane or the hinge groove is asymmetrical with respect to the second center line.

7. The rotary compressor of claim 6 , wherein a first inner circumferential surface of the hinge groove is located on the suction side and a second inner circumferential surface of the hinge groove is located on the discharge side with respect to the second center line, and wherein an arc length of the first inner circumferential surface is smaller than an arc length of the second inner circumferential surface.

8. The rotary compressor of claim 7 , wherein a first extension surface that extends in a direction away from the vane is disposed at an end of the first inner circumferential surface.

9. The rotary compressor of claim 7 , wherein a first extension surface that extends in a direction away from the vane is disposed at an end of the first inner circumferential surface, and a second extension surface that extends in an opposite direction to the first extension surface is disposed at an end of the second inner circumferential surface, and wherein a length of the first extension surface is larger than a length of the second extension surface.

10. The rotary compressor of claim 6 , wherein the vane comprises:
a vane body slidably provided in the vane slot;
a hinge protrusion rotatably coupled to the hinge groove; and
an interference avoiding surface that extends between the vane body and the hinge protrusion and is recessed, and wherein sides of the interference avoiding surface are asymmetrical with respect to the second center line.

11. The rotary compressor of claim 10 , wherein when a first interference avoiding surface is on the suction side and a second interference avoiding surface is on the discharge side with respect to the second center line, a depth of the first interference avoiding surface is larger than a depth of the second interference avoiding surface.

12. A rotary compressor, comprising:
a rotary shaft;
a plurality of plates that supports the rotary shaft;
a cylinder provided between the plurality of plates to define a compression space, and provided with a vane slot;
a roller coupled to the rotary shaft; and
a vane, a first end of which is slidably coupled to the vane slot of the cylinder, and a second end of which is coupled to the roller, wherein a first circumferential side of the vane defines a space having a suction pressure, and a second circumferential side of the vane defines a space having a discharge pressure, wherein the vane is disposed such that a radial center line of the vane passes through a position spaced apart from an axial center of the rotary shaft, wherein a first inner circumferential surface of the hinge groove is located on a suction side and a second inner circumferential surface of the hinge groove is located on a discharge side with respect to the radial center line of the vane, wherein an arc length of the first inner circumferential surface is smaller than an arc length of the second inner circumferential surface, wherein a first extension surface that extends in a direction away from the vane is disposed at an end of the first inner circumferential surface, and a second extension surface that extends in an opposite direction to the first extension surface is disposed at an end of the second inner circumferential surface, and wherein a length of the first extension surface is larger than a length of the second extension surface.

13. The rotary compressor of claim 12 , wherein when an imaginary line passing through the axial center of the rotary shaft and a hinge center of the vane is a first center line, and the radial center line of the vane passing through the hinge center of the vane is a second center line, the vane is disposed such that a maximum roller reaction force direction transmitted to the vane and the second center line correspond to each other.

14. The rotary compressor of claim 13 , wherein the vane is symmetrical with respect to the second center line.

15. A rotary compressor, comprising:
a rotary shaft;
a plurality of plates that supports the rotary shaft;
a cylinder provided between the plurality of plates to define a compression space, and provided with a vane slot;
a roller slidably coupled to the rotary shaft inside of the cylinder, and disposed with a hinge groove on an outer circumferential surface of the roller; and
a vane slidably coupled to the vane slot of the cylinder and rotatably coupled to the hinge groove of the roller, wherein a radial center line of the vane slot is tilted with respect to an imaginary line passing through an axial center of the rotary shaft and a hinge center of the vane, wherein a first inner circumferential surface of the hinge groove is located on a suction side and a second inner circumferential surface of the hinge groove is located on a discharge side with respect to the radial center line of the vane slot, wherein an arc length of the first inner circumferential surface is smaller than an arc length of the second inner circumferential surface, wherein the vane comprises:
a vane body slidably provided in the vane slot;
a hinge protrusion rotatably coupled to the hinge groove; and
an interference avoiding surface that extends between the vane body and the hinge protrusion and is recessed, and wherein sides of the interference avo

Assignees

• Lg Electronics Inc

Inventors

• Lee Jingyu
• Kim Shin
• Han Kyuchul

Classifications

• F01C21/102

  Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure · CPC title

• F04C2240/60

  Shafts · CPC title

• F04C2270/16

  Wear · CPC title

• F04C2210/26

  Refrigerants with particular properties, e.g. HFC-134a · CPC title

• F04C2240/80

  Other components · CPC title