Press-fit bearing housing with non-cylindrical diameter

Patent metadata

Field	Value
Publication number	US-11092157-B2
Application number	US-201615238397-A
Country	US
Kind code	B2
Filing date	Aug 16, 2016
Priority date	Mar 23, 2012
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

A scroll compressor that includes a housing and scroll compressor bodies disposed in the housing. A motor is disposed within the housing and operably connected to a drive shaft for driving one of the scroll compressor bodies. The drive shaft is rotationally supported at one end by a crankcase which includes a bearing housing and a bearing. The crankcase includes a plurality of openings or gas passages passing through the crankcase, as well as a plurality of generally cylindrical sections positioned respectively between adjacent openings. The cylindrical sections define contact regions which can engage an inner periphery of the housing when the crankcase is mounted therein.

First claim

What is claimed is:

1. A method of providing for a scroll compressor, comprising:
compressing fluid with a pair of scroll compressor bodies;
driving the scroll compressor bodies relative to each other with an electrical motor, the electrical motor having a stator and a rotor providing rotational output on a drive shaft, the drive shaft adapted to act on one of the scroll compressor bodies;
press fitting a bearing member into a housing, the bearing member having at least two cylinder sections being angularly spaced apart, and separated by at least two corresponding gaps such that the bearing member has intermittent contact with the housing;
rotationally supporting the drive shaft with the bearing member for rotation about an axis;
wherein the press fitting of the bearing member into the housing comprises press fitting the bearing member such that each cylinder section comprises a contact region including a first section with a first radius of curvature, a second section extending from the first section, the second section being flat, and a third section extending from the second section and having a second radius of curvature, and wherein, during the press fitting, the third section is the first section into the housing such that the housing deforms around the third section; and
wherein the housing remains in contact with the entire second and third sections after the press fitting.

2. The method of claim 1 , wherein any two adjacent cylinder sections are separated by one of the at least two gaps; and
wherein an inner radius of the housing is smaller, at each of the at least two gaps, than the inner radius at each of the at least two cylinder sections after the press fitting.

3. The method of claim 1 , wherein each of the at least two cylinder sections spans an angle that is greater than 50 degrees and less than 150 degrees.

4. The method of claim 1 , wherein each cylinder section comprises an outer cylindrical surface spanning an angle greater than 50 degrees and less than 150 degrees, and at least one lubrication drainage channel is formed in each cylinder section and extends vertically over the cylindrical surface from top to bottom so as to facilitate drainage.

5. The method of claim 1 , wherein the first radius of curvature of the first section is between 88 and 99 millimeters.

6. The method of claim 1 , wherein the second radius of curvature of the third section is between 1561 and 2268 millimeters.

7. The method of claim 1 , wherein the bearing member comprises two cylinder sections on opposite sides of a bearing member hub, and two gaps on opposite sides of the bearing member hub, the two gaps each extending between the two cylinder sections.

8. The method of claim 1 , further comprising connecting a pilot ring to the bearing member with one or more mechanical fasteners, such that the pilot ring is in sliding contact with one of the scroll compressor bodies.

9. The method of claim 1 , wherein the bearing member is an upper bearing member situated above the electrical motor, the upper bearing member comprising a plurality of posts projecting upwardly for supporting directly or indirectly one of the scroll compressor bodies, wherein each cylinder section connects at least two adjacent posts with each gap separating two adjacent posts.

10. The method of claim 1 , wherein piloting one of the scroll compressor bodies with a pilot ring comprises, piloting one of the scroll compressor bodies with a pilot ring that surrounds at least one of the scroll compressor bodies, and has a cylindrical pilot interface therebetween.

11. The method of claim 1 , wherein the press fitting of the bearing member into the housing causes the housing to also deform around the second section of the bearing member.

12. The method of claim 11 , wherein the press fitting of the bearing member into the housing causes the housing to also deform around the first section of the bearing member.

13. The method of claim 1 , wherein the press fitting of the bearing member into the housing comprises press fitting the bearing member with the third section having an axial length greater than the axial length of the first section and greater than the axial length of the second section.

14. The method of claim 1 , wherein the press fitting of the bearing member into the housing comprises press fitting the bearing member where the second radius of curvature is more than seventeen and less than twenty-six times greater than the first radius of curvature.

15. The method of claim 1 , wherein the first radius of curvature is different from the second radius of curvature.

16. The method of claim 1 , wherein the radius of curvature of the third section is such that a first portion of the third section deforms the housing more than a second portion of the third section.

17. The method of claim 1 , wherein the housing remains in contact with a portion of the first section after press fitting.

Assignees

• Duppert Ronald J
• Wang Xianghong
• Bitzer Kuehlmaschinenbau Gmbh

Inventors

• Duppert Ronald J
• Wang Xianghong

Classifications

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C2230/603

  Centering; Aligning · CPC title

• F04C29/0085

  Prime movers · CPC title

• F04C2240/40

  Electric motor · CPC title

• F04C2240/805

  Fastening means, e.g. bolts · CPC title