Bearing device and exhaust turbine supercharger

• US 10,641,330 B2
• Filed: 03/01/2016
• Issued: 05/05/2020
• Est. Priority Date: 03/01/2016
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Inventors: Futae, Takaya, Nambu, Takashi, Ishizaki, Tatsuya, Yano, Seigi
• Primary Examiner(s): Pilkington, James
• Application Number:
  US16/080,953
• Publication Number:
  US 20190063496A1
• Time in Patent Office: 1,526 Days
• CPC Class Codes: F01D 25/16 Arrangement of bearings; Supporting or mounting bearings in casings bearings per se F16C
• CPC Class Codes: F01D 25/18 Lubricating arrangements of machines or engines in general F01M
• CPC Class Codes: F02B 39/00 Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
• CPC Class Codes: F02C 6/12 Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
• CPC Class Codes: F16C 17/02 for radial load only
• CPC Class Codes: F16C 17/045 with grooves in the bearing surface to generate hydrodynamic pressure, e.g. spiral groove thrust bearings
• CPC Class Codes: F16C 17/107 with at least one surface for radial load and at least one surface for axial load
• CPC Class Codes: F16C 17/18 with floating brasses or brushing, rotatable at a reduced speed F16C17/03, F16C17/06 take precedence
• CPC Class Codes: F16C 17/26 Systems consisting of a plurality of sliding-contact bearings
• CPC Class Codes: F16C 2360/24 Turbochargers in general F02C6/12
• CPC Class Codes: F16C 33/106 Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid

Abstract

Reduce bearing loss due to lubricating oil using a rotary shaft; a journal bearing that is provided to the rotary shaft and that rotatably supports the rotary shaft; a flange part having an opposing surface part that is arranged so as to oppose a side surface part of the journal bearing with a gap therebetween in the axial direction in which the rotary shaft extends; and a recess part provided in the side surface part or the opposing surface part. In the projected area of the journal bearing in the axial direction, the area of a section including the recess part and not forming the gap is larger than the area in which the side surface part and the opposing surface part form the gap.

Claims

1. A bearing device comprising:

a rotating shaft;

a journal bearing which is provided on the rotating shaft to rotatably support the rotating shaft, the journal bearing having an end face, the end face having a side surface portion and a notch, the notch being provided to be continuous in a circumferential direction and to be cut out in a triangular shape obliquely in a radial direction and an axial direction in which the rotating shaft extends, on a radially inner edge of the journal bearing; and

a disk member having a facing portion which is disposed so as to face the end face of the journal bearing so that a fixed gap is formed between the facing portion and the side surface portion in the axial direction

wherein in a projected area of the journal bearing in the axial direction, an area obtained when the notch is projected onto the facing portion of the disk member is larger than an area obtained when the side surface portion is projected onto the facing portion.

2. The bearing device according to claim 1, wherein the journal bearing further has a groove at the end face, the groove being continuously provided in the side surface portion in a circumferential direction.

3. An exhaust turbine turbocharger comprising:

a bearing device according to claim 2;

a turbine;

a compressor coaxially connected to the turbine by a rotating shaft; and

a housing in which the turbine, the compressor, the rotating shaft, the journal bearing, and the disk member are accommodated.

4. An exhaust turbine turbocharger comprising:

a bearing device according to claim 1;

a turbine;

a compressor coaxially connected to the turbine by a rotating shaft; and

a housing in which the turbine, the compressor, and the rotating shaft, the journal bearing, and the disk member are accommodated.