Rotating shaft support structure and rotary machine

• US 9,945,291 B2
• Filed: 10/22/2013
• Issued: 04/17/2018
• Est. Priority Date: 03/29/2013
• Status: Active Grant

• Current Assignee: Mitsubishi Power Limited (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: mitsubishi hitachi power systems, ltd. (Mitsubishi Heavy Industries, Ltd.)
• Inventors: Tsutsumi, Eiichi, Kondo, Takahiro
• Primary Examiner(s): Pilkington, James
• Application Number:
  US14/779,039
• Publication Number:
  US 20160053687A1
• Time in Patent Office: 1,638 Days
• CPC Class Codes: F02C 3/04 having a turbine driving a compressor power transmission arrangements F02C7/36; control of working fluid flow F02C9/16
• CPC Class Codes: F02C 7/06 Arrangements of bearings bearings F16C; Lubricating of turbo machines F01D25/18; of machines or engines in general F01M
• CPC Class Codes: F16C 17/02 for radial load only
• CPC Class Codes: 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
• CPC Class Codes: F16C 2360/23 Gas turbine engines
• CPC Class Codes: F16C 33/10 Construction relative to lubrication lubrication in general F16N
• CPC Class Codes: F16C 33/1045 Details of supply of the liquid to the bearing
• CPC Class Codes: F16C 33/1085 Channels or passages to recirculate the liquid in the bearing

Abstract

A rotating shaft support structure and a rotary machine which can suppress the influence of lubricating oil on other devices. A rotating shaft support structure (journal bearing mechanism) and a rotary machine having the same includes: a bearing (journal bearing) which supports a rotating shaft, of which the surface facing the rotating shaft is supplied with lubricating oil by a direct lubrication method, and which is disposed inside a cavity holding a suction mechanism for recovering mist of the lubricating oil L leaking from the clearance between the rotating shaft and side plates; and at least one scattering prevention plate which is disposed on the side of an end surface of the bearing in the axial direction of the rotating shaft, on the vertically upper side of the rotating shaft.

Claims

1. A rotating shaft support structure comprising:

a bearing configured to support a rotating shaft extending in an axial direction along a horizontal plane and having a surface facing the rotating shaft supplied with lubricating oil by a direct lubrication method, the bearing being disposed inside a cavity holding a suction mechanism for recovering a mist of the lubricating oil from within the cavity and

at least one scattering prevention plate disposed on a side of an end surface of the bearing and extending in the axial direction, the at least one scattering prevention plate being positioned on an upper side of the rotating shaft,

wherein the scattering prevention plate has an inclined part, which is inclined in a direction extending away from the bearing in the axial direction as the inclined part extends radially inward with respect to the rotating shaft support structure.

2. The rotating shaft support structure according to claim 1, wherein the scattering prevention plate is fixed on the bearing.

3. The rotating shaft support structure according to claim 1, comprising two scattering prevention plates, wherein one scattering prevention plate is disposed on the side of one end surface of the bearing and extending in the axial direction, while the other scattering prevention plate is disposed on a side of another end surface of the bearing and extending in the axial direction.

4. The rotating shaft support structure according to claim 1, wherein the bearing is a journal bearing.

5. A rotary machine comprising the rotating shaft support structure according to claim 1.

6. A rotary machine comprising the rotating shaft support structure according to claim 3.

7. A rotary machine comprising the rotating shaft support structure according to claim 4.