# US 2017/0284465 A1 · Journal bearing

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- Number: US 2017/0284465 A1
- Document ID: US20170284465A1
- Status: Published application
- Kind: A1
- Application number: 15/513,839
- Filed: 2014-12-01
- Published: 2017-10-05
- Earliest claimed: 2014-12-01
- Assignees: Mitsubishi Electric Corporation
- Applicants: Mitsubishi Electric Corporation
- Inventors: Koji KAWASHIMA; Shingo KINGETSU; Taishi HAMASAKI; Hidenori NAGAHAMA
- Web page: https://patentgrep.com/patent/US20170284465A1

## CPC

- F16C 33/1045: {Details of supply of the liquid to the bearing}
- F16C 17/022: {with a pair of essentially semicircular bearing sleeves}
- F16C 17/03: with tiltably-supported segments, e.g. Michell bearings {(hydrostatic bearings with tiltably supported bearing pads F16C32/0666; made from a plurality of rods F16C33/26; with flexible leaves F16C17/024; hydrodynamic bearings with chambers F16C33/1075)}
- F16C 33/105: {Conditioning, e.g. metering, cooling, filtering}
- F16C 33/108: {with a plurality of elements forming the bearing surfaces, e.g. bearing pads}
- F16C 33/1085: {Channels or passages to recirculate the liquid in the bearing}
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

A journal bearing, in which a lower half carrier ring is disposed on the outer peripheral side of a horizontally installed rotating shaft, and an upstream side pad and a downstream side pad are disposed on the inner side of the lower half carrier ring, includes an upstream side oil supply portion and downstream side oil supply portion which supply lubricant oil to the upstream side pad and downstream side pad, the bearing being characterized in that the supply quantity of lubricant oil supplied from downstream side oil supply nozzles of the downstream side oil supply portion is adjusted so as to be less than the supply quantity of lubricant oil supplied from upstream side oil supply nozzles of the upstream side oil supply portion.

## Claims

### Claim 1

A journal bearing comprising:
a carrier ring having an upper half carrier ring and lower half carrier ring disposed on the outer peripheral side of a horizontally installed rotating shaft;
a first pad disposed on the inner side of the lower half carrier ring and a second pad disposed on the downstream side of the first pad;
a first oil supply portion which supplies lubricant oil between the rotating shaft and the first pad and a second oil supply portion which supplies lubricant oil between the rotating shaft and the second pad, wherein
the supply quantity of lubricant oil supplied from the second oil supply portion is less than the supply quantity of lubricant oil supplied from the first oil supply portion.

### Claim 2 (depends on 1)

The journal bearing according to claim 1, wherein
the diameter of discharge holes opened in second oil supply nozzles which configure the second oil supply portion and discharge lubricant oil is smaller than the diameter of discharge holes opened in first oil supply nozzles which configure the first oil supply portion and discharge lubricant oil.

### Claim 3 (depends on 1)

The journal bearing according to claim 1, wherein
the number of discharge holes opened in second oil supply nozzles which configure the second oil supply portion and discharge lubricant oil is smaller than the number of discharge holes opened in a first oil supply nozzle which configures the first oil supply portion and discharges lubricant oil.

### Claim 4 (depends on 1)

The journal bearing according to claim 1, wherein
the number of second oil supply nozzles which configure the second oil supply portion and discharge lubricant oil is smaller than the number of first oil supply nozzles which configure the first oil supply portion and discharge lubricant oil.

### Claim 5 (depends on 1)

The journal bearing according to claim 1, wherein
first oil supply nozzles which configure the first oil supply portion and discharge lubricant oil are provided in two mutually separate places, and that
second oil supply nozzles which configure the second oil supply portion and discharge lubricant oil are provided in two mutually separate places.

### Claim 6 (depends on 1)

The journal bearing according to claim 1, wherein
first oil supply nozzles which configure the first oil supply portion and discharge lubricant oil are provided in three mutually separate places, and
second oil supply nozzles which configure the second oil supply portion and discharge lubricant oil are provided in two mutually separate places.

### Claim 7 (depends on 1)

The journal bearing according to claim 1, wherein
a first oil supply nozzle which configures the first oil supply portion and discharges lubricant oil is provided in one place, and that
a second oil supply nozzle which configures the second oil supply portion and discharges lubricant oil is provided in one place.

### Claim 8 (depends on 1)

The journal bearing according to claim 1, wherein the journal bearing is used in a rotating electric machine.