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Bearings and Bearing Pads

A technology of bearings and gaskets, applied in the field of bearings and bearing gaskets, which can solve the problems of rising temperature of inclined gaskets, increased heat generation of lubricating oil, and inability to quickly absorb vibration of rotating shafts, etc., to achieve deformation suppression and temperature uniformity Effect

Active Publication Date: 2018-02-13
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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  • Bearings and Bearing Pads
  • Bearings and Bearing Pads
  • Bearings and Bearing Pads

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0043] use Figure 1 ~ Figure 3 B describes the diagonal pad radial bearing and the bearing pad for the radial bearing as the first embodiment of the present invention.

[0044] [1-1. Overall structure of inclined pad radial bearing]

[0045] Such as figure 1 As shown, the bearing 100 as the first embodiment of the present invention constitutes the following radial bearing, which can rotate in the radial direction in the direction indicated by arrow A (hereinafter, also referred to as the rotation direction) in a rotatable manner Axis 1 is supported.

[0046] That is, the bearing 100 includes a plurality of (here, two) tilt pads (bearing pads according to the first embodiment of the present invention) 2 to support the rotating shaft 1 from vertically below; the bearing housing 4 is arranged in The circumference of the rotating shaft 1 and the inclined gasket 2; and the oil supply nozzle 6, which sprays lubricating oil from the spray portion 6a at the tip.

[0047] A plurality of (he...

no. 2 approach

[0077] use image 3 A and image 3 B describes the bearing and the bearing pad as the second embodiment of the present invention. In addition, the same reference numerals are given to the same constituent elements as those of the first embodiment, and the description thereof is omitted.

[0078] [2-1. Tilt Pad Radial Bearing and Tilt Pad Structure for Radial Bearing]

[0079] As the bearing device of the second embodiment of the present invention, with respect to figure 1 The bearing 100 of the first embodiment shown is used instead of the tilt pad 2 image 3 A and image 3 The inclined pad shown in B (as the bearing pad of the second embodiment of the present invention) 2A.

[0080] In the inclined gasket 2 of the first embodiment, the outlet 3d through the flow path 3 is arranged on the back surface 2b of the gasket. In contrast, in the inclined gasket 2A of the present embodiment, the outlet 3d through the flow path 3A is arranged on the inclined The front surface of the pad 2A f...

no. 3 approach

[0087] use Figure 4 A. Figure 4 B. Figure 5 A and Figure 5 B describes the bearing and the bearing pad as the third embodiment of the present invention. In addition, the same reference numerals are given to the same constituent elements as in the above-mentioned respective embodiments, and the description thereof is omitted.

[0088] [3-1. Overall structure of tilt pad thrust bearing]

[0089] Such as Figure 4 A and Figure 4 As indicated by B, the bearing 200 as the third embodiment of the present invention is configured as a thrust bearing that supports the rotating shaft 21 rotating in the direction indicated by the arrow A (hereinafter, also referred to as the rotation direction) from the axial direction.

[0090] That is, the bearing 200 includes a tilt pad (bearing pad according to the third embodiment of the present invention) 22 for rotatably in the axial direction against a thrust ring integrated with the rotating shaft 21 in a flange shape (by The support portion) 21a...

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Abstract

The present invention provides a bearing and a bearing pad capable of suppressing deformation of the bearing pad without increasing the cost. A through flow path (3) is provided in the bearing pad (2), and the through flow path (3) extends from the first The opening (3a) extends to the side away from the supported surface (1a) and reaches the second opening (3d).

Description

Technical field [0001] The present invention relates to a bearing that rotatably supports a rotating shaft via a bearing pad and supplies lubricating oil between the bearing pad and the rotating shaft, and a bearing pad thereof. Background technique [0002] Incline pad bearings and thrust pad bearings, which consist of multiple independent bearing pads on the bearing surface, have the characteristic of quickly absorbing the vibration of the rotating shaft. In rotating machinery such as steam turbines and gas turbines, such bearings are widely used in view of the above-mentioned characteristics. In recent years, in such rotating machines, the demand for higher output and lower loss has been further increased compared to the past. Therefore, it is necessary to reduce the size of the bearing that supports the rotating shaft of the rotating machine to keep the bearing loss small. However, when the size of the bearing is reduced, the bearing loss can be suppressed, but on the contr...

Claims

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Application Information

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Patent Type & Authority Patents(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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