Sealing structure and scroll air compressor having same

Patent metadata

Field	Value
Publication number	US-11725657-B2
Application number	US-201817277290-A
Country	US
Kind code	B2
Filing date	Dec 5, 2018
Priority date	Nov 1, 2018
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

Disclosed are a sealing structure and a scroll air compressor having the same. The sealing structure includes an orbiting scroll including an orbiting scroll spiral tooth, the orbiting scroll spiral tooth being provided with an orbiting scroll spiral tooth groove, an orbiting scroll wear-resistant sealing strip being provided in the orbiting scroll spiral tooth groove, a stationary scroll including a stationary scroll spiral tooth matched with the orbiting scroll spiral tooth, the stationary scroll spiral tooth being provided with a stationary scroll spiral tooth groove, a stationary scroll wear-resistant sealing strip is provided in the stationary scroll spiral tooth groove, the wear-resistant sealing strip is divided into sections including a high-temperature and high-pressure section and a medium-temperature and medium-pressure section.

First claim

What is claimed is:

1. A sealing structure, comprising:
an orbiting scroll comprising an orbiting scroll spiral tooth, wherein the orbiting scroll spiral tooth is provided with an orbiting scroll spiral tooth groove, an orbiting scroll wear-resistant sealing strip is provided in the orbiting scroll spiral tooth groove, the orbiting scroll wear-resistant sealing strip comprises a first orbiting scroll wear-resistant sealing strip portion in a high-temperature and high-pressure section and a second orbiting scroll wear-resistant sealing strip portion in a medium-temperature and medium-pressure section, a thickness of the orbiting scroll wear-resistant sealing strip is greater than a depth of the orbiting scroll spiral tooth groove;
a stationary scroll comprising a stationary scroll spiral tooth matched with the orbiting scroll spiral tooth, wherein the stationary scroll spiral tooth is provided with a stationary scroll spiral tooth groove, a stationary scroll wear-resistant sealing strip is provided in the stationary scroll spiral tooth groove, the stationary scroll wear-resistant sealing strip comprises a first stationary scroll wear-resistant sealing strip portion in the high-temperature and high-pressure section and a second stationary scroll wear-resistant sealing strip portion in the medium-temperature and medium-pressure section, a thickness of the stationary scroll wear-resistant sealing strip is greater than a depth of the stationary scroll spiral tooth groove;
wherein the stationary scroll is provided with a damping sealing groove, an elastic damping component is provided in the damping sealing groove, and a damping wear-resistant sealing strip is provided on the orbiting scroll, the damping wear-resistant sealing strip abuts against the elastic damping component, an abutting portion of the damping wear-resistant sealing strip and the elastic damping component is lower than an upper end surface of the damping sealing groove; or,
the orbiting scroll is provided with the damping sealing groove, the elastic damping component is provided in the damping sealing groove, the damping wear-resistant sealing strip is provided on the stationary scroll, the damping wear-resistant sealing strip abuts against the elastic damping component, the abutting portion is lower than the upper end surface of the damping sealing groove;
wherein a cross section of the elastic damping component is in a shape of a circle or a circular tube, and an outer diameter of the circle or the circular tube is between one half and three fifths of a depth of the damping sealing groove, and less than a width of the damping groove.

2. The sealing structure according to claim 1 , wherein,
the thickness of the orbiting scroll wear-resistant sealing strip in the high-temperature and high-pressure section is greater than the thickness of the orbiting scroll wear-resistant sealing strip in the medium-temperature and medium-pressure section, the orbiting scroll spiral tooth groove accordingly comprises the orbiting scroll spiral tooth groove in the high-temperature and high-pressure section and the orbiting scroll spiral tooth groove in the medium-temperature and medium-pressure section, the depth of the orbiting scroll spiral tooth groove in the high-temperature and high-pressure section is greater than the depth of the orbiting scroll spiral tooth groove in the medium-temperature and medium-pressure section; or,
the thickness of the stationary scroll wear-resistant sealing strip in the high-temperature and high-pressure section is greater than the thickness of the stationary scroll wear-resistant sealing strip in the medium-temperature and medium-pressure section, the stationary scroll spiral tooth groove accordingly comprises the stationary scroll spiral tooth groove in the high-temperature and high-pressure section and the stationary scroll spiral tooth groove in the medium-temperature and medium-pressure section, the depth of the stationary scroll spiral tooth groove in the high-temperature and high-pressure section is greater than the depth of the stationary scroll spiral tooth groove in the medium-temperature and medium-pressure section.

3. The sealing structure according to claim 1 , wherein cross sections of the orbiting scroll wear-resistant sealing strip, the stationary scroll wear-resistant sealing strip, and the damping wear-resistant sealing strip are in a shape of a square.

4. The sealing structure according to claim 1 , wherein a thickness of the damping wear-resistant sealing strip is between one half and three fifths of the depth of the damping sealing groove.

5. The sealing structure according to claim 1 , wherein a temperature resistance of the orbiting scroll wear-resistant sealing strip in the high-temperature and high-pressure section, a temperature resistance of the orbiting scroll wear-resistant sealing strip in the medium-temperature and medium-pressure section, and a temperature resistance of the damping wear-resistant sealing strip decrease in sequence.

6. The sealing structure according to claim 1 , wherein a width of the orbiting scroll wear-resistant sealing strip is the same as that of the stationary scroll wear-resistant sealing strip.

7. The sealing structure according to claim 1 , wherein surfaces of the orbiting scroll wear-resistant sealing strip, the stationary scroll wear-resistant sealing strip, and the damping wear-resistant sealing strip are smooth and flat.

8. The sealing structure according to claim 1 , wherein,
the orbiting scroll wear-resistant sealing strip in the high-temperature and high-pressure section and/or the stationary scroll wear-resistant sealing strip in the high-temperature and high-pressure section are made of a PTFE composite material comprising copper powder, molybdenum disulfide, carbon fiber or glass fiber, and a temperature resistance range thereof is −240° C. to 280° C.;
the orbiting scroll wear-resistant sealing strip in the medium-temperature and medium-pressure section and/or the stationary scroll wear-resistant sealing strip in the medium-temperature and medium-pressure section are made of the PTFE composite material comprising LCP, molybdenum disulfide, carbon fiber or glass fiber, and a temperature resistance range thereof is −240° C. to 280° C.;
the damping wear-resistant sealing strip is made of the PTFE composite material comprising PI, molybdenum disulfide, carbon fiber or glass fiber, and the temperature resistance range of the damping wear-resistant sealing strip is −220° C. to −250° C.;
a material of the elastic damping component is any one of silica gel, latex, or polyethylene, or any one of composite materials with silica gel, latex, or polyethylene as a matrix.

9. The sealing structure according to claim 1 , wherein a heat dissipation groove is provided on the stationary scroll, the damping sealing groove is provided between the stationary scroll spiral tooth and the heat dissipation groove; or, the heat dissipation groove is provided on the orbiting scroll, and the damping sealing groove is provided between the orbiting scroll spiral tooth and the heat dissipation groove.

10. The sealing structure according to claim 1 , wherein elasticity and plasticity of the elastic damping component is greater than that of the damping wear-resistant sealing strip.

11. The sealing structure according to claim 1 , wherein,
a base material of one of the orbiting scroll and the stationary scroll is a cast aluminum alloy or a forged aluminum alloy, and a base material of the other is powder metallurgy or a cast iron; or,
the base materials of the orbiting scroll and the stationary scroll are both the cast aluminum alloy or the forged aluminum alloy, and one or both of the base

Assignees

• Gree Green Refrigeration Tech Ct Co Ltd Zhuhai

Inventors

• Wei Huijun
• Li Yelin
• Shi Zhengliang
• Guo Xiaoqing
• Chen Xiaoxiao

Classifications

• F04C18/0284 Primary

  Details of the wrap tips · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C27/005

  Axial sealings for working fluid · CPC title

• F01C19/005

  Structure and composition of sealing elements such as sealing strips, sealing rings and the like; Coating of these elements (vane construction F01C21/0809; piston rings and ring sealings of similar construction in general F16J9/00) · CPC title

• F01C19/08

  Axially-movable sealings for working fluids · CPC title