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Bearing and bearing bush

A technology of bearings and liners, which is applied in the field of bearings and bearing liners, can solve problems such as rising temperature of inclined liners, increased heat generation of lubricating oil, increased deformation of inclined liners, etc., and achieves the effects of suppressing deformation and uniform temperature Effect

Active Publication Date: 2016-06-08
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the radius of curvature of the inclined pad becomes large due to thermal deformation, the gap between the inlet and outlet sides becomes too large and the oil film cannot be maintained anymore
Therefore, the overall balance is maintained in a state where the thickness of the oil film becomes thinner, but if the thickness of the oil film becomes thinner, the heat generation of the lubricating oil will further increase
[0006] As a result, the temperature of the entire tilting pad increases, the deformation of the tilting pad increases, and eventually the rotating shaft comes into contact with the bearing (the rotating shaft cannot be loaded anymore).
Therefore, the load capacity of the bearing is reduced
[0007] In addition, when the tilt pad is deformed, it will also affect the dynamic stability of the tilt pad
That is, the attenuation coefficient decreases, and the vibration of the rotating shaft cannot be quickly absorbed

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0044] use Figure 1 ~ Figure 3 B will describe the slant pad radial bearing and the bearing pad for the radial bearing which are the first embodiment of the present invention.

[0045] [1-1. The overall structure of the inclined pad radial bearing]

[0046] Such as figure 1 As shown, the bearing 100 as the first embodiment of the present invention constitutes a radial bearing capable of rotating in the direction indicated by arrow A (hereinafter also referred to as the rotation direction) in the radial direction. Axis 1 is supported.

[0047] That is, the bearing 100 includes: a plurality of (here, two) inclined pads (bearing pads as the first embodiment of the present invention) 2 supporting the rotating shaft 1 from vertically below; a bearing housing 4 disposed on Around the rotating shaft 1 and the tilt pad 2; and the oil supply nozzle 6, which sprays lubricating oil from the discharge part 6a at the front end.

[0048] A plurality of (here, two) shaft tips 5 are atta...

no. 2 approach

[0078] use image 3 A and image 3 B will describe the bearing and the bearing pad which are the second embodiment of the present invention. In addition, the same code|symbol is attached|subjected to the same component as 1st Embodiment, and description is abbreviate|omitted.

[0079] [2-1. Slant Pad Radial Bearing and Structure of Slant Pad for Radial Bearing]

[0080] As the bearing device according to the second embodiment of the present invention, with respect to figure 1 The bearing 10 of the first embodiment shown is used instead of the tilt pad 2 image 3 A and image 3 The inclined pad (as the bearing pad according to the second embodiment of the present invention) 2A shown in B.

[0081] In the inclined pad 2 of the first embodiment, the outlet 3d of the through-flow path 3 is disposed on the back surface 2b of the pad, whereas in the inclined pad 2A of the present embodiment, the outlet 3d of the through-flow path 3A is disposed on the inclined pad 2A. The pad ...

no. 3 approach

[0088] use Figure 4 A. Figure 4 B. Figure 5 A and Figure 5 B will describe the bearing and the bearing pad which are the third embodiment of the present invention. In addition, the same code|symbol is attached|subjected to the same component as each said embodiment, and description is abbreviate|omitted.

[0089] [3-1. Whole structure of inclined pad thrust bearing]

[0090] Such as Figure 4 A and Figure 4 As shown in B, a bearing 200 as a third embodiment of the present invention is configured as a thrust bearing that axially supports a rotating shaft 21 that rotates in a direction indicated by an arrow A (hereinafter, also referred to as a rotation direction).

[0091] That is, the bearing 200 includes: an inclined pad (as a bearing pad according to the third embodiment of the present invention) 22, and a thrust ring integrally formed in a flange shape with the rotating shaft 21 so as to be rotatable in the axial direction support portion) 21a (that is, to rotat...

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Abstract

The invention provides a bearing and a bearing bush which can suppress deformation of the bearing bush in a condition that cost is not increased, A through flow path (3) is arranged in the bearing bush (2). The through flow path (3) extends from a first opening (3a) of a high-temperature area (2H) arranged at a sliding surface (2a) facing a supported surface (1a) to one side far away from the supported surface (1a) and reaches a a second opening (3d).

Description

technical field [0001] The present invention relates to a bearing that rotatably supports a rotary shaft via a bearing pad and supplies lubricating oil between the bearing pad and the rotary shaft, and its bearing pad. Background technique [0002] Slope pad bearings and thrust pad bearings, whose bearing surfaces are composed of separate bearing pads, have the characteristic of quickly absorbing the vibration of the rotating shaft. In rotating machines such as steam turbines and gas turbines, bearings of this type are widely used in view of the above characteristics. In recent years, in such rotating machines, the demand for higher output and lower loss has been further increased compared with conventional ones. Therefore, it is necessary to reduce the size of a bearing that supports a rotating shaft of a rotary machine to keep the bearing loss small. However, when the size of the bearing is reduced, although the bearing loss can be suppressed, on the contrary, since the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/04
CPCF16C33/04F16C17/03F16C37/002F16C17/06F16C33/1065F16C33/1085F16C2360/23F16C33/108F01D25/16F16C17/02F16C33/10F16C37/00F16C17/10
Inventor 佐野岳志
Owner MITSUBISHI HEAVY IND LTD
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