Journal bearing

Patent metadata

Field	Value
Publication number	US-10274010-B2
Application number	US-201415513839-A
Country	US
Kind code	B2
Filing date	Dec 1, 2014
Priority date	Dec 1, 2014
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

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.

First claim

The invention claimed is:

1. A journal bearing comprising:
a carrier ring having an upper half carrier ring and lower half carrier ring disposed on an outer peripheral side of a horizontally installed rotatable shaft;
a first pad disposed on an inner side of the lower half carrier ring and a second pad disposed on a downstream side of the first pad;
a first oil supply portion including at least one first oil supply nozzle which supplies lubricant oil between the rotatable shaft and the first pad and a second oil supply portion including at least one second oil supply nozzle which supplies lubricant oil between the rotatable shaft and the second pad, wherein
a diameter of discharge holes opened in the at least one second oil supply nozzle is smaller than a diameter of discharge holes opened in the at least one first oil supply nozzle so that a supply quantity of lubricant oil supplied from the second oil supply portion is less than a supply quantity of lubricant oil supplied from the first oil supply portion.

2. The journal bearing according to claim 1 , wherein
the at least one first oil supply nozzle is two first oil supply nozzles that are provided in two mutually separate places, and
the at least one second oil supply nozzle is two second oil supply nozzles that are provided in two mutually separate places.

3. The journal bearing according to claim 1 , wherein
the at least one first oil supply nozzle is one first oil supply nozzle that is provided in one place, and
the at least one second oil supply nozzle is one second oil supply nozzle that is provided in one place.

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

5. A journal bearing comprising:
a carrier ring having an upper half carrier ring and lower half carrier ring disposed on an outer peripheral side of a horizontally installed rotatable shaft;
a first pad disposed on an inner side of the lower half carrier ring and a second pad disposed on a downstream side of the first pad;
a first oil supply portion including at least one first oil supply nozzle which supplies lubricant oil between the rotatable shaft and the first pad and a second oil supply portion including at least one second oil supply nozzle which supplies lubricant oil between the rotatable shaft and the second pad, wherein
a number of discharge holes opened in the at least one second oil supply nozzle is smaller than a number of discharge holes opened in the at least one first oil supply nozzle so that a supply quantity of lubricant oil supplied from the second oil supply portion is less than a supply quantity of lubricant oil supplied from the first oil supply portion.

6. The journal bearing according to claim 5 , wherein
the at least one first oil supply nozzle is one first oil supply nozzle that is provided in one place, and
the at least one second oil supply nozzle is one second oil supply nozzle that is provided in one place.

7. A journal bearing according to claim 5 , wherein
the at least one first oil supply nozzle is two first oil supply nozzles that are provided in two mutually separate places, and
the at least one second oil supply nozzle is two second oil supply nozzles that are provided in two mutually separate places.

8. A journal bearing comprising:
a carrier ring having an upper half carrier ring and lower half carrier ring disposed on an outer peripheral side of a horizontally installed rotatable shaft;
a first pad disposed on an inner side of the lower half carrier ring and a second pad disposed on a downstream side of the first pad;
a first oil supply portion including at least two first oil supply nozzles which supplies lubricant oil between the rotatable shaft and the first pad and a second oil supply portion including at least one second oil supply nozzle which supplies lubricant oil between the rotatable shaft and the second pad, wherein
a number of the at least one second oil supply nozzle is smaller than a number of the at least two first oil supply nozzles so that a supply quantity of lubricant oil supplied from the second oil supply portion is less than a supply quantity of lubricant oil supplied from the first oil supply portion.

9. The journal bearing according to claim 8 , wherein
the at least one first oil supply nozzle is three first oil supply nozzles that are provided in three mutually separate places, and
the at least one second oil supply nozzle is two second oil supply nozzles that are provided in two mutually separate places.

Assignees

• Mitsubishi Electric Corp

Inventors

• Kawashima Koji
• Kingetsu Shingo
• HAMASAKI Taishi
• Nagahama Hidenori

Classifications

• F16C33/1045 Primary

  Details of supply of the liquid to the bearing · CPC title

• F16C17/022

  with a pair of essentially semicircular bearing sleeves · CPC title

• F16C17/03 Primary

  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)} · CPC title

• F16C33/1085

  Channels or passages to recirculate the liquid in the bearing · CPC title

• F16C33/108

  with a plurality of elements forming the bearing surfaces, e.g. bearing pads · CPC title