Compressor having a lower frame and a method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9429157-B2
Application number	US-201313949350-A
Country	US
Kind code	B2
Filing date	Jul 24, 2013
Priority date	Mar 18, 2013
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

A compressor having a lower frame and a method of manufacturing the same are disclosed. The compressor may include a cylindrical shell, a rotational shaft rotatably mounted in the cylindrical shell, a rotor and a stator that rotates the rotational shaft, a compression device driven by the rotational shaft, a lower bearing configured to rotatably support one side of the rotational shaft, a lower frame configured to support the lower bearing, the lower frame being configured to be press-fitted into a lower end portion of the cylindrical shell, and a base configured to seal the lower end portion of the cylindrical shell. The lower frame may include a main body configured to be press-fitted onto an inner circumferential surface of the cylindrical shell and a flange that extends from the main body, the flange being configured to limit a press-fit depth by contacting the lower end portion of the cylindrical shell.

First claim

What is claimed is:

1. A compressor, comprising:
a cylindrical shell;
a rotational shaft rotatably mounted in the cylindrical shell;
a rotor and stator configured to rotate the rotational shaft;
a compression device driven by the rotational shaft;
a lower bearing configured to rotatably support one side of the rotational shaft;
a lower frame configured to support the lower bearing, the lower frame being configured to be press-fitted into a lower end portion of the cylindrical shell; and
a base configured to seal the lower end portion of the cylindrical shell, wherein the lower frame includes:
a main body configured to be press-fitted onto an inner circumferential surface of the cylindrical shell; and
a flange that extends from the main body, the flange being configured to limit a press-fit depth by contacting the lower end portion of the cylindrical shell, wherein a mounting portion is formed on the base to mount the flange, wherein the mounting portion includes a mounting surface that contacts a lower surface of the flange and an annular wall that face an outer circumferential surface of the flange, and wherein a welding is formed at a portion defined by the outer circumferential surface of the flange, an outer circumferential surface of the shell and an inner circumferential surface of the annular wall.

2. The compressor of claim 1 , wherein the flange extends from an outer circumferential portion of the main body.

3. The compressor of claim 2 , wherein the flange extends from the outer circumferential portion of the main body at a lower end portion thereof.

4. The compressor of claim 2 , wherein an outer end portion of the flange extends substantially between an outer circumferential surface and an inner circumferential surface of the cylindrical shell.

5. The compressor of claim 1 , wherein the mounting portion corresponds in shape to a shape of the lower frame.

6. The compressor of claim 1 , wherein an upper outer circumferential surface of the flange is spaced apart from an upper inner circumferential surface of the annular wall, and a lower outer circumferential surface of the flange contacts a lower inner circumferential surface of the annular wall, and wherein the welding is formed at a portion defined by the upper outer circumferential surface of the flange, a lower outer circumferential surface of the, shell, and the upper inner circumferential surface of the annular wall.

7. The compressor of claim 1 , wherein the lower bearing includes an inner circumferential surface that rotatably supports an outer circumferential surface of the rotational shaft, and wherein the inner circumferential surface and the flange of the lower frame are concentric with each other.

8. The compressor of claim 1 , wherein an upper surface of the flange is configured to extend substantially perpendicular to the rotational shaft.

9. A compressor, comprising:
a cylindrical shell;
a rotational shaft rotatably mounted in the cylindrical shell;
a rotor and stator configured to rotate the rotational shaft;
a compression device driven by the rotational shaft;
a lower bearing rotatably supporting one side of the rotational shaft;
a lower frame supporting the lower bearing, the lower frame press-fitted into a lower end portion of the cylindrical shell; wherein the lower frame includes:
a main body press-fitted onto an inner circumferential surface of the cylindrical shell; and
a flange that extends from the main body, the flange limiting a press-fit depth by contacting the lower end portion of the cylindrical shell, and a base sealing the lower end portion of the cylindrical shell, wherein a mounting portion is formed on the base to mount the flange, wherein the mounting portion includes a mounting surface that contacts a lower surface of the flange and an annular wall, wherein an entire outer circumferential surface of the flange is spaced apart from an inner circumferential surface of the annular wall, and an outer circumferential surface of the shell, which is placed on the flange, is spaced apart from the inner circumferential surface of the annular wall, and wherein the welding is formed at a portion defined by the outer circumferential surface of the flange, the outer circumferential surface of the shell, and the inner circumferential surface of the annular wall facing the outer circumferential surface of the flange and the outer circumferential surface of the shell.

Assignees

• Lee Kiuk
• Kim Suchul
• Han Nara
• Lg Electronics Inc

Inventors

• Lee Kiuk
• Kim Suchul
• Han Nara

Classifications

• F04C2240/30

  Casings or housings · CPC title

• F04C18/00 Primary

  Rotary-piston pumps specially adapted for elastic fluids (with fluid ring or the like F04C19/00; rotary-piston pumps in which the working-fluid is exclusively displaced by one or more reciprocating pistons F04B) · CPC title

• F04C2230/603

  Centering; Aligning · CPC title

• Y10T29/4924

  Scroll or peristaltic type · CPC title

• F04C23/008

  Hermetic pumps · CPC title