US 12,123,462 B2
Journal bearing and rotary appliance using a journal bearing
Naokatsu Takara, Tokyo (JP); Yosuke Uchida, Tokyo (JP); and Saya Okano, Tokyo (JP)
Assigned to Mitsubishi Generator Co., Ltd., Hyogo (JP)
Appl. No. 17/911,432
Filed by Mitsubishi Generator Co., Ltd., Hyogo (JP)
PCT Filed Apr. 7, 2020, PCT No. PCT/JP2020/015600
§ 371(c)(1), (2) Date Sep. 14, 2022,
PCT Pub. No. WO2021/205523, PCT Pub. Date Oct. 14, 2021.
Prior Publication US 2023/0115499 A1, Apr. 13, 2023
Int. Cl. F16C 33/10 (2006.01); F16C 17/03 (2006.01)
CPC F16C 33/106 (2013.01) [F16C 33/1045 (2013.01); F16C 33/108 (2013.01); F16C 17/03 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A journal bearing which supports a rotation shaft of a rotary appliance, the journal bearing, comprising;
an oil supply nozzle which has an oil distribution part, extending in an axial direction of the rotation shaft and supplying lubricating oil, and
a pad which is provided at a rear side of the oil supply nozzle, in a rotational direction of the rotation shaft, and supports the rotation shaft rotatably,
wherein an inner periphery face of the pad, which opposes an outer periphery face of the rotation shaft, has an opening side face, in which a radial direction spacing between the inner periphery face and the outer periphery face of the rotation shaft becomes smaller, from a front end face of the pad, located at a front side in the rotational direction of the rotation shaft, toward the rear side in the rotational direction,
the opening side face of the pad has a plurality of slopes or curved surfaces, and
between the oil distribution part and the pad, the journal bearing has a bubble discharge path which discharges air bubbles mixed in the lubricating oil.
 
9. A journal bearing which supports a rotation shaft of a rotary appliance, the journal bearing, comprising;
an oil supply nozzle which has an oil distribution part, extending in an axial direction of the rotation shaft and supplying lubricating oil, and
a pad which is provided at a rear side of the oil supply nozzle, in a rotational direction of the rotation shaft, and supports the rotation shaft rotatably,
wherein an inner periphery face of the pad, which opposes an outer periphery face of the rotation shaft, has an opening side face, in which a radial direction spacing between the inner periphery face of the pad and the outer periphery face of the rotation shaft becomes smaller, from a front end face of the pad, located at a front side in the rotational direction of the rotation shaft, toward the rear side in the rotational direction,
between the oil distribution part and the pad, the journal bearing has a bubble discharge path which discharges air bubbles mixed in the lubricating oil,
wherein a circumferential direction size of the opening side face extends in a range of 6 to 16% of the entire circumferential direction size of the inner periphery face of the pad.
 
14. A rotary appliance using a journal bearing, where a rotation shaft of the rotary appliance is supported by the journal bearing, comprising;
an oil supply nozzle which has an oil distribution part, extending in an axial direction of the rotation shaft and supplying lubricating oil, and
a pad which is provided at a rear side of the oil supply nozzle, in a rotational direction of the rotation shaft, and supports the rotation shaft rotatably,
wherein an inner periphery face of the pad, which opposes an outer periphery face of the rotation shaft, has an opening side face, in which a radial direction spacing between the inner periphery face and the outer periphery face of the rotation shaft becomes smaller, from a front end face of the pad, located at a front side in the rotational direction of the rotation shaft, toward the rear side in the rotational direction,
the opening side face of the pad has a plurality of slopes or curved surfaces, and
between the oil distribution part and the pad, the journal bearing has a bubble discharge path which discharges air bubbles mixed in the lubricating oil.