Scroll compressor

Patent metadata

Field	Value
Publication number	US-10495088-B2
Application number	US-201615246650-A
Country	US
Kind code	B2
Filing date	Aug 25, 2016
Priority date	Sep 7, 2015
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A scroll compressor is provided that may include a casing having a sealed inner space; a drive motor provided in the inner space of the casing to generate a rotational force; a rotational shaft rotatably coupled to the drive motor; an orbiting scroll formed of an aluminum material, and coupled to the rotational shaft to perform an orbiting movement; a fixed scroll coupled to the orbiting scroll to form a compression space; and an Oldham ring coupled to the orbiting scroll, and formed of a sintered metal. With this structure, it may be possible to prevent the Oldham ring from being worn out due to contact with the orbiting scroll. Further, a weight loss portion or wear-resistant coating layer may be formed on a portion of the Oldham ring, thereby suppressing or preventing vibration noise of the scroll compressor from being increased due to a weight increase of the Oldham ring.

First claim

What is claimed is:

1. A scroll compressor, comprising:
a casing having a sealed inner space;
a drive motor provided in the inner space of the casing to generate a rotational force;
a rotational shaft rotatably coupled to the drive motor;
an orbiting scroll formed of an aluminum material, and coupled to the rotational shaft to perform an orbiting movement;
a fixed scroll coupled to the orbiting scroll to form a compression space; and
an Oldham ring coupled to the orbiting scroll, and formed of a sintered metal, wherein the Oldham ring includes:
a ring; and
a plurality of keys formed of a same material and as a single body with the ring, the plurality of keys formed in a protruding manner on at least one of axial-direction lateral surfaces of the ring to allow the Oldham ring to be slidably coupled in a radial direction to key grooves of the orbiting scroll, wherein the ring includes:
a plurality of thrust surfaces formed on an opposite surface to a surface having the plurality of keys, and the plurality of thrust surfaces continuously formed at both side surfaces of the plurality of keys in a circumferential direction and protruding by a predetermined height, wherein the plurality of thrust surfaces is supported by a member corresponding to the Oldham ring;
a plurality of stepped surfaces that extends in a stepped manner from both side surfaces of the respective plurality of thrust surfaces in the circumferential direction; and
a weight reducing portion that extends between the plurality of stepped surfaces as to connect the plurality of stepped surfaces to each other, wherein a circumferential length of the weight reducing portion is longer than a circumferential length of the plurality of thrust surfaces, and an axial height of the weight reducing portions is lower than an axial length of the plurality of thrust surfaces.

2. The scroll compressor of claim 1 , wherein the casing is provided with a frame fixed to the casing and slidably coupled to the Oldham ring, and the Oldham ring is formed with the plurality of keys inserted into key grooves of the frame to be slidably coupled thereto in the radial direction.

3. The scroll compressor of claim 1 , wherein the ring includes a plurality of holes or grooves having a predetermined cross sectional area.

4. The scroll compressor of claim 3 , wherein the plurality of holes or grooves is provided in the weight reducing portion of the ring.

5. A scroll compressor, comprising:
a casing having a sealed inner space;
a drive motor provided in the inner space of the casing to generate a rotational force;
a rotational shaft rotatably coupled to the drive motor;
an orbiting scroll coupled to the rotational shaft to perform an orbiting movement;
a fixed scroll coupled to the orbiting scroll to form a compression space; and
an Oldham ring coupled to the orbiting scroll, at least a portion of which is formed of a different material from a material of the orbiting scroll, wherein the Oldham ring includes:
a ring; and
a plurality of keys formed in a protruding manner on at least one of axial-direction lateral surfaces of the ring to allow the Oldham ring to be slidably coupled in a radial direction to key grooves of the orbiting scroll, wherein the ring and the plurality of keys are formed of different materials, wherein either one of the ring or the plurality of keys is formed with a protrusion, and the other one thereof is formed with a groove or hole into which the protrusion is inserted, wherein the groove or hole is formed in a shape that fully surrounds the protrusion to support the protrusion in the radial direction, and wherein the protrusion is formed as a single body on the ring or the key.

6. The scroll compressor of claim 5 , wherein the Oldham ring is formed of a material having a higher hardness than a hardness of the orbiting scroll.

7. The scroll compressor of claim 6 , wherein the ring is formed with a stepped surface on at least one of the axial-direction lateral surfaces.

8. The scroll compressor of claim 6 , wherein the ring is formed with the hole or groove having a predetermined volume.

9. The scroll compressor of claim 5 , wherein the orbiting scroll is formed of an aluminum material, wherein the ring is formed of an aluminium material, and wherein the plurality of keys is formed of a material having a higher hardness than a hardness of the orbiting scroll.

10. The scroll compressor of claim 5 , wherein the casing is provided with a frame fixed to the casing and slidably coupled to the Oldham ring, wherein the Oldham ring is formed with the plurality of keys inserted into key grooves of the frame to be slidably coupled thereto in a radial direction, and wherein the plurality of keys is formed of the same material as a material of the frame.

11. The scroll compressor of claim 5 , wherein the protrusion is pressed to the groove or hole.

12. The scroll compressor of claim 5 , wherein the protrusion is configured to be inserted into the groove or hole and then welded to the groove or hole.

13. The scroll compressor of claim 5 , wherein the protrusion is configured to be inserted into the groove or hole and then adhered to the groove or hole by an adhesive.

14. The scroll compressor of claim 5 , wherein the protrusion or the groove or hole has a cross-section in a rectangular or an angular shape.

Assignees

• Lg Electronics Inc

Inventors

• Oh Junchul
• Lee Jaeha
• Choi Seheon
• Lee Byeongchul

Classifications

• F05C2203/04

  Phosphor · CPC title

• F05C2201/0466

  Nickel · CPC title

• F05C2201/0454

  Case-hardened steel · CPC title

• F04C2270/16

  Wear · CPC title

• F04C2230/41

  Hardening; Annealing · CPC title