Claims
- 1. An oil-retaining bearing structure for a rotary machine comprising:
- an oil-retaining bearing secured in a bearing housing;
- a rotating shaft rotatably supported on said oil-retaining bearing;
- wherein said bearing housing includes
- a small hole formed in said bearing housing, through which said rotating shaft is mounted;
- at least one axial groove provided in the inner surface of said bearing housing; and
- at least one radial groove provided in the inner surface of said bearing housing, communicating with said axial groove and said small hole.
- 2. The oil-retaining bearing structure for a rotary machine according to claim 1, wherein said rotary machine is an axial-flow fan.
- 3. The oil-retaining bearing structure for a rotary machine according to claim 1, wherein said oil-retaining bearing is a sintered oil-retaining bearing.
- 4. The oil-retaining bearing structure for a rotary machine according to claim 1, wherein a shallow step is provided adjacently to said small hole in said bearing housing; said radial groove communicating with said step section.
- 5. The oil-retaining bearing structure for a rotary machine according to claim 1, wherein said axial grooves are arranged in four positions, nearly equally spaced, in a circumferential direction.
Priority Claims (2)
Number |
Date |
Country |
Kind |
8-237395 |
Aug 1996 |
JPX |
|
9-162107 |
Jun 1997 |
JPX |
|
Parent Case Info
This application is a divisional of application Ser. No. 08/912,672, filed on Aug. 18, 1997 now U.S. Pat. No. 5,833,370, the entire contents of which are hereby incorporated by reference.
US Referenced Citations (3)
Divisions (1)
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Number |
Date |
Country |
Parent |
912672 |
Aug 1997 |
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