CN218971641U - Tilting pad with double static pressure chambers - Google Patents
Tilting pad with double static pressure chambers Download PDFInfo
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- CN218971641U CN218971641U CN202222990208.5U CN202222990208U CN218971641U CN 218971641 U CN218971641 U CN 218971641U CN 202222990208 U CN202222990208 U CN 202222990208U CN 218971641 U CN218971641 U CN 218971641U
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- hydrostatic
- tilting pad
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- oil inlet
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Abstract
The utility model discloses a double-hydrostatic-cavity tilting pad, wherein two hydrostatic cavities are formed in the outer surface of the tilting pad, and a countersunk hole is formed in the position, close to the symmetry plane, of the central axis of the double-hydrostatic-cavity tilting pad, of each hydrostatic cavity; the inner end of the countersunk hole is opened on the inner surface of the double-hydrostatic-cavity tilting pad; oil inlet holes are formed at the two ends of the outer surface of the double-static-pressure cavity tilting pad; the two hydrostatic cavities are symmetrically arranged on a symmetry plane where the central axes of the double hydrostatic cavities are located, the two countersunk holes are also symmetrically arranged on the symmetry plane, and the oil inlet holes at the two ends are also symmetrically arranged on the symmetry plane. The double static pressure chambers with inclined bottom surfaces and the double oil inlet grooves ensure that the rotor has good static pressure supporting effect and bearing capacity when rotating positively and negatively, and solve the technical problems of large vibration and insufficient bearing capacity of high-speed equipment such as high-speed motors, compressors, high-speed turbines and the like.
Description
Technical Field
The utility model belongs to the technical field of tilting pad bearings, and particularly relates to a double hydrostatic cavity bearing bush suitable for a tilting pad bearing.
Background
The tilting pad bearing is mainly applied to high-speed and light-load occasions. However, as the rotational speed designs of high-speed motors, turbines, nuclear power feed pumps and the like are higher and higher, the problem of vibration brings serious challenges to the tilting pad bearings. In the traditional tilting pad bearing, a top shaft oil cavity is formed in the inner surface of the tilting pad, a rotor is jacked up mainly for starting and stopping, but the top shaft oil cavity damages part of the dynamic pressure oil cavity, moreover, the back of the traditional tilting pad and the shell are rigidly supported, and the back of the traditional tilting pad and the shell can be mutually influenced when the rotor or the shell is vibrated by whirling, so that the integral vibration of the tilting pad bearing can be aggravated.
Disclosure of Invention
The utility model provides a double static pressure cavity tilting pad aiming at the defects of the prior art.
The technical scheme adopted by the utility model is as follows:
the utility model relates to a double-hydrostatic-cavity tilting pad, two hydrostatic cavities are arranged on the outer surface of the tilting pad, and a countersunk hole is arranged at the position of each hydrostatic cavity, which is close to the symmetrical plane where the central axis of the double-hydrostatic-cavity tilting pad is positioned; the inner end of the countersunk hole is opened on the inner surface of the double-static-pressure cavity tilting pad; oil inlet holes are formed in the two ends of the outer surface of the double-hydrostatic-cavity tilting pad; the two hydrostatic cavities are symmetrically arranged on a symmetry plane where the central axes of the double hydrostatic cavities are located, the two countersunk holes are also symmetrically arranged on the symmetry plane, and the oil inlet holes at the two ends are also symmetrically arranged on the symmetry plane.
Preferably, the bottom surfaces of the two hydrostatic cavities are inclined and are arranged opposite to the symmetry plane where the central axes of the tilting pads of the double hydrostatic cavities are located.
Preferably, two ends of the inner surface of the double-static-pressure cavity tilting pad are respectively provided with oil inlet grooves communicated with oil inlet holes at the same end, and the two oil inlet grooves are symmetrically arranged about a symmetry plane where the central axis of the double-static-pressure cavity tilting pad is located.
More preferably, the bottom surfaces of the two oil inlet grooves are inclined and are arranged opposite to the symmetry plane where the central axis of the double hydrostatic cavity tilting pad is located.
Preferably, each end of the double hydrostatic cavity tilting pad is provided with two oil inlet holes which are arranged along the axial distance.
Preferably, one end of the oil inlet hole formed in the outer surface of the double-hydrostatic-cavity tilting pad is also provided with an anti-rotation pin hole, and the anti-rotation pin hole is in clearance fit with the pin.
The utility model has the following beneficial effects:
the utility model leads the lubricating oil to be directly led into the oil inlet groove from the oil inlet holes at the two ends to reach the working surface (inner surface), thereby improving the bearing capacity of the utility model on the rotor. Furthermore, the bottom surfaces of the two oil inlet grooves are inclined and are opposite to the symmetry plane where the central axis of the double-hydrostatic-cavity tilting pad is located, so that the rotor is guaranteed to have better bearing capacity on the rotor no matter forward rotation or reverse rotation. Furthermore, the high-pressure oil on the working surface is led into the two static pressure cavities through the two countersunk holes to form a static pressure damping oil film, so that the vibration resistance is improved. Therefore, the utility model solves the technical problems of large vibration and insufficient bearing capacity of high-speed equipment such as a high-speed motor, a compressor, a high-speed turbine and the like.
Drawings
FIG. 1 is a schematic view of the outer surface structure of the present utility model.
Fig. 2 is a cross-sectional view of the internal surface structure of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
As shown in fig. 1 and 2, the outer surface of the double-hydrostatic-cavity tilting pad is provided with two hydrostatic cavities 1, and a countersunk hole 2 is formed at the position of each hydrostatic cavity close to the symmetry plane where the central axis of the double-hydrostatic-cavity tilting pad is positioned; the inner end of the countersunk hole is opened on the inner surface of the double-hydrostatic-cavity tilting pad; oil inlet holes 3 are formed in the two ends of the outer surface of the double-hydrostatic-cavity tilting pad, and the inner ends of the oil inlet holes are opened on the inner surface of the double-hydrostatic-cavity tilting pad and used for introducing lubricating oil; the two hydrostatic cavities are symmetrically arranged on a symmetry plane where the central axes of the double hydrostatic cavities are located, the two countersunk holes are also symmetrically arranged on the symmetry plane, and the oil inlet holes at the two ends are also symmetrically arranged on the symmetry plane.
As a preferred embodiment, the bottom surfaces of the two static pressure cavities are inclined and are opposite to the symmetry plane where the central axis of the double static pressure cavity tilting pad is located, so that the double static pressure cavity tilting pad can meet the better static pressure supporting effect regardless of forward rotation or reverse rotation of the rotor.
As a preferred embodiment, two ends of the inner surface of the double-hydrostatic-cavity tilting pad are respectively provided with oil inlet grooves 4 communicated with oil inlet holes at the same end, and the two oil inlet grooves are symmetrically arranged about a symmetry plane where the central axis of the double-hydrostatic-cavity tilting pad is located.
More preferably, the bottoms of the two oil inlet grooves are inclined and are opposite to the symmetry plane where the central axis of the double-hydrostatic-cavity tilting pad is located, so that the double-hydrostatic-cavity tilting pad can have better bearing capacity on the rotor regardless of forward rotation or reverse rotation of the rotor.
As a preferred embodiment, each end of the double hydrostatic chamber tilting pad is provided with two oil inlet holes which are arranged along the axial spacing.
As a preferred embodiment, the outer surface of the double-hydrostatic-cavity tilting pad is provided with an oil inlet hole, one end of the oil inlet hole is also provided with an anti-rotation pin hole 5, the anti-rotation pin hole is in clearance fit with a pin, and the pin is fixed with the shell of the tilting pad bearing so as to prevent the tilting pad of the double-hydrostatic-cavity tilting pad from rotating.
When the double-hydrostatic-cavity tilting pad is used, three pins (of course, the number can be changed according to specific design requirements) are generally uniformly distributed in the housing of the tilting pad bearing along the circumferential direction, and the pins of each double-hydrostatic-cavity tilting pad are fixed with the housing of the tilting pad bearing. In the working state, lubricating oil entering the shell is directly led into the oil inlet groove from the oil inlet holes at the two ends to reach the working surface (inner surface) to bear the rotor; and the two countersunk holes guide high-pressure oil of the working surface into the two hydrostatic cavities to form a hydrostatic damping oil film. The utility model is provided with two static pressure cavities, the bottom surfaces of the two static pressure cavities are inclined and are opposite to the symmetry plane where the central axis of the double static pressure cavity tilting pad is positioned, so that the rotor can be guaranteed to rotate positively or negatively. The double-static-pressure-cavity tilting pad is provided with the two oil inlet grooves, the bottom surfaces of the two oil inlet grooves are inclined and are opposite to the symmetry plane where the central axis of the double-static-pressure-cavity tilting pad is located, so that the rotor can have better bearing capacity on the rotor regardless of forward rotation or reverse rotation.
Claims (6)
1. Double static pressure chamber tilting pad, its characterized in that: the outer surface is provided with two hydrostatic cavities, and a countersunk hole is formed in the position, close to the symmetrical plane where the central axis of the double hydrostatic cavity tilting pad is located, of each hydrostatic cavity; the inner end of the countersunk hole is opened on the inner surface of the double-static-pressure cavity tilting pad; oil inlet holes are formed in the two ends of the outer surface of the double-hydrostatic-cavity tilting pad; the two hydrostatic cavities are symmetrically arranged on a symmetry plane where the central axes of the double hydrostatic cavities are located, the two countersunk holes are also symmetrically arranged on the symmetry plane, and the oil inlet holes at the two ends are also symmetrically arranged on the symmetry plane.
2. The dual hydrostatic chamber tilting pad of claim 1, wherein: the bottom surfaces of the two static pressure cavities are inclined and are opposite to the symmetry plane where the central axes of the double static pressure cavities are located.
3. The dual hydrostatic chamber tilting pad of claim 1, wherein: and two ends of the inner surface of the double-static-pressure-cavity tilting pad are respectively provided with oil inlet grooves communicated with oil inlet holes at the same end, and the two oil inlet grooves are symmetrically arranged about the symmetry plane of the central axis of the double-static-pressure-cavity tilting pad.
4. A dual hydrostatic chamber tilting pad according to claim 3 and wherein: the bottom surfaces of the two oil inlet grooves are inclined and are opposite to the symmetry plane where the central axis of the double static pressure cavity tilting pad is located.
5. The dual hydrostatic chamber tilting pad of claim 1, wherein: two oil inlet holes which are arranged along the axial distance are formed in each end of the double-hydrostatic-cavity tilting pad.
6. The dual hydrostatic chamber tilting pad of claim 1, wherein: the outer surface of the double-hydrostatic-cavity tilting pad is provided with an oil inlet, one end of the oil inlet is provided with an anti-rotation pin hole, and the anti-rotation pin hole is in clearance fit with the pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222990208.5U CN218971641U (en) | 2022-11-10 | 2022-11-10 | Tilting pad with double static pressure chambers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222990208.5U CN218971641U (en) | 2022-11-10 | 2022-11-10 | Tilting pad with double static pressure chambers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218971641U true CN218971641U (en) | 2023-05-05 |
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ID=86167553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222990208.5U Active CN218971641U (en) | 2022-11-10 | 2022-11-10 | Tilting pad with double static pressure chambers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218971641U (en) |
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2022
- 2022-11-10 CN CN202222990208.5U patent/CN218971641U/en active Active
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