Method of making a motor/generator cooling jacket

• US 20050268464A1
• Filed: 06/04/2004
• Published: 12/08/2005
• Est. Priority Date: 06/04/2004
• Status: Active Grant

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Burjes, Roger Wayne, Brown, Daryl Travis
• Granted Patent: US 7,322,103 B2
• Time in Patent Office: Days
• US Class Current: 29/890.35
• CPC Class Codes: F28F 3/12 Elements constructed in the shape of a hollow panel, e.g. with channels F28D1/02, F28D1/03 take precedence
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets
• CPC Class Codes: Y10T 29/4935 Heat exchanger or boiler making
• CPC Class Codes: Y10T 29/49359 Cooling apparatus making, e.g., air conditioner, refrigerator

Abstract

A cooling jacket assembly is made for an electric motor or generator. A hollow cylindrical housing is cast with an outer peripheral surface and an annular axially facing end surface, a plurality of grooves formed in the outer peripheral surface and a radial lip at one end. The outer peripheral surface is machined into a smooth surface having a uniform diameter. Inlet and outlet ports are drilled through the end surface to communicate with the grooves. A pair of sealing recesses are formed in the outer peripheral surface on opposite sides of the grooves, and an O-ring seal is placed in each recess. A cylindrical sleeve is slid over the outer peripheral surface of the housing until it engages the lip and so that the sleeve slidably engages the outer peripheral surface and sealing engages the seals.

Claims

1. A method of making a cooling jacket assembly for an electric machine, comprising the following steps:

forming a hollow cylindrical housing having an outer peripheral surface and an annular axially facing end surface, and having a plurality of grooves formed in the outer peripheral surface;

forming an inlet port in the housing, said inlet port extending through the end face and communicating with a first portion of the grooves;

forming an outlet port in the housing, said outlet port extending through the end face and communicating with a second portion of the grooves;

forming a pair of sealing recesses in the outer peripheral surface, said recesses being spaced apart on opposite sides of the grooves;

placing a seal in each of the sealing recesses; and

sliding a cylindrical sleeve over the outer peripheral surface of the housing so that the sleeve slidably engages the outer peripheral surface and sealing engages the seals.

2. The method of claim 1, further comprising:

machining the outer peripheral surface into a smooth surface having a uniform diameter.

3. The method of claim 1, further comprising:

forming the housing with an axially extending wall separating the first and second groove portions from each other.

4. The method of claim 1, further comprising:

forming the housing with an axially extending wall separating the inlet and outlet ports from each other.

5. The method of claim 1, wherein:

forming the housing with a plurality of annular grooves separated by annular ribs, with an inlet chamber communicated with one end of the grooves, with an outlet chamber communicated with a second end of the grooves, and with an axially extending wall separating the inlet and outlet chambers from each other.

6. The method of claim 1, further comprising:

forming the housing with a lip projecting radially from one end thereof; and

sliding the sleeve over the housing until it engages the lip.

7. A method of making a cooling jacket assembly for an electric machine, comprising the following steps:

forming a hollow cylindrical housing having an outer peripheral surface, an annular axially facing end surface, a lip projecting radially from one end thereof, and having a plurality of grooves formed in the outer peripheral surface;

forming an inlet port in the housing, said inlet port extending through the end face and communicating with a first portion of the grooves;

forming an outlet port in the housing, said outlet port extending through the end face and communicating with a second portion of the grooves;

forming a pair of sealing recesses in the outer peripheral surface, said recesses being spaced apart on opposite sides of the grooves;

machining the outer peripheral surface into a smooth surface having a uniform diameter;

placing a seal in each of the sealing recesses; and

sliding a cylindrical sleeve over the outer peripheral surface of the housing so that the sleeve slidably engages the outer peripheral surface, sealingly engages the seals and engages the lip.

8. The method of claim 7, further comprising:

forming the housing with a wall separating the first and second groove portions from each other.

9. The method of claim 8, further comprising:

forming the housing with a wall separating the inlet and outlet ports from each other.

10. The method of claim 8, further comprising:

forming the housing with a plurality of annular grooves separated by annular ribs, with an inlet chamber communicated with one end of the grooves, with an outlet chamber communicated with a second end of the grooves, and with an axially extending wall separating the inlet and outlet chambers from each other.

11. A method of making a cooling jacket assembly for an electric machine, comprising the following steps:

forming a hollow cylindrical housing having an outer peripheral surface and having a plurality of grooves formed in the outer peripheral surface;

forming an inlet port in the housing, said inlet port communicating with a first portion of the grooves;

forming an outlet port in the housing, said outlet port communicating with a second portion of the grooves; and

sliding a cylindrical sleeve over the outer peripheral surface of the housing so that the sleeve slidably engages the outer peripheral surface and sealing engages the seals.

12. The method of claim 11, further comprising:

machining the outer peripheral surface into a smooth surface having a uniform diameter.

13. The method of claim 11, further comprising:

forming a pair of sealing recesses in the outer peripheral surface, said recesses being spaced apart on opposite sides of the grooves; and

placing a seal in each of the sealing recesses before sliding the sleeve over the outer peripheral surface.