Cooling structure of bearing housing for turbocharger

Patent metadata

Field	Value
Publication number	US-9546568-B2
Application number	US-201214117795-A
Country	US
Kind code	B2
Filing date	Jun 22, 2012
Priority date	Jun 30, 2011
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

A cooling structure for a bearing housing for a turbocharger is provided. The cooling structure is configured so that the cooling structure has improved productivity, the occurrence of heat soak-back is reduced, and the cooling structure has improved cooling performance. The cooling structure cools both a bearing housing 13 and a bearing 52 by cooling water flowing through an annular cooling water path 13 f formed in the bearing housing 13 , and is provided with: a water path inlet 13 h for supplying the cooling water and a water path outlet 13 j for discharging the cooling water, which are provided in the bearing housing 13 to communicate with the annular cooling water path 13 f ; and a partial partition 14 a in the bearing housing 13 to partially close a water path which forms the shortest route between the water path inlet 13 h and the water path outlet 13 j.

First claim

The invention claimed is:

1. A cooling structure for a bearing housing for a turbocharger in which a turbine housing for housing a turbine rotor is attached to a compressor housing for housing a compressor rotor via the bearing housing, the turbine rotor and the compressor is connected by a shaft and the shaft is rotatably supported via the bearing in the bearing housing, the cooling structure comprising:
an annular cooling water path formed in the bearing housing and surrounding the shaft and the bearing so as to cool the bearing housing and the bearing with cooling water flowing in the annular cooling water path;
a water path inlet provided in the bearing housing to communicate with the annular cooling water path, the cooling water being supplied to the annular cooling water path from the water path inlet;
a water path outlet provided in the bearing housing to communicate with the annular cooling water path, the cooling water being discharged from the water path outlet;
a side water path arranged to be offset in an axial direction of the shaft with respect to the annular cooling water path, in the side water path, the water path inlet and the water path outlet being provided, and the side water path communicating the water path inlet and the water path outlet so as to form a shortest path along a circumferential direction of the shaft inside the side water path; and
a partial partition for partially closing a water path disposed between the water path inlet and the water path outlet,
wherein the partial partition is arranged in the shortest path of the water path between the water path inlet and the water path outlet; and
wherein the partial partition is arranged at a height in the flow path formed by the annular cooling water path and the side water path, the height being 20 to 80% of an axial height of the flow path along the axial direction of the flow path.

2. The cooling structure for the bearing housing for the turbocharger according to claim 1 ,
wherein the partial partition is configured to almost completely close the side water path at said axial height.

3. The cooling structure for the bearing housing for the turbocharger according to claim 1 ,
wherein the partial partition has an inclined face inclining relative to the axial direction of the shaft so as to facilitate a flow of the cooling water to the annular cooling water path from the water path inlet or to the water path outlet from the annular cooling path.

4. A cooling structure for the bearing housing for the turbocharger in which a turbine housing for housing a turbine rotor is attached to a compressor housing for housing a compressor rotor via the bearing housing, the turbine rotor and the compressor is connected by a shaft and the shall is rotatably supported via the bearing in the bearing housing, the cooling structure comprising:
an annular cooling water path formed in the bearing housing and surrounding the shaft and the bearing so as to cool the bearing housing and the bearing with cooling water flowing in the annular cooling water path;
a water path inlet provided in the bearing housing to communicate with the annular cooling water path, the cooling water being supplied to the annular cooling water path from the water path inlet;
a water path outlet provided in the bearing housing to communicate with the annular cooling water path, the cooling water being discharged from the water path outlet; and
a partial partition for partially closing a water path disposed between the water path inlet and the water path outlet,
wherein plural sets of the water path inlet and the water path outlet are provided, and the partial partition is provided in each of the plural sets of the water path inlet and the water path outlet.

5. A cooling structure for the bearing housing for the turbocharger in which a turbine housing for housing a turbine rotor is attached to a compressor housing for housing a compressor rotor via the bearing housing, the turbine rotor and the compressor is connected by a shaft and the shaft is rotatably supported via the bearing in the bearing housing, the cooling structure comprising:
an annular cooling water path formed in the bearing housing and surrounding the shaft and the bearing so as to cool the bearing housing and the bearing with cooling water flowing in the annular cooling water path;
a water path inlet provided in the bearing housing to communicate with the annular cooling water path, the cooling water being supplied to the annular cooling water path from the water path inlet;
a water path outlet provided in the bearing housing to communicate with the annular cooling water path, the cooling water being discharged from the water path outlet; and
a partial partition for partially closing a water path disposed between the water path inlet and the water path outlet,
wherein the partial partition is arranged in the shortest path of the water path between the water path inlet and the water path outlet, and
wherein the partial partition is divided into a plurality of sections.

Assignees

• Kanzaka Tadashi
• Iwakiri Kenichiro
• Ogita Hiroshi
• Mitsubishi Heavy Ind Ltd

Inventors

• Kanzaka Tadashi
• Iwakiri Kenichiro
• Ogita Hiroshi

Classifications

• F02B39/005

  Cooling of pump drives · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F05D2260/232

  characterized by the cooling medium · CPC title

• F01D25/14

  Casings modified therefor (double casings F01D25/26) · CPC title

• F01D25/125 Primary

  of bearings · CPC title