CN111486172B - Open type diamond tilting pad thrust bearing - Google Patents
Open type diamond tilting pad thrust bearing Download PDFInfo
- Publication number
- CN111486172B CN111486172B CN202010356738.7A CN202010356738A CN111486172B CN 111486172 B CN111486172 B CN 111486172B CN 202010356738 A CN202010356738 A CN 202010356738A CN 111486172 B CN111486172 B CN 111486172B
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- China
- Prior art keywords
- tile
- diamond
- disc
- static disc
- static
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000010432 diamond Substances 0.000 title claims abstract description 95
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 82
- 230000003068 static effect Effects 0.000 claims abstract description 88
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 238000003825 pressing Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 239000011159 matrix material Substances 0.000 abstract description 6
- 238000005553 drilling Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 9
- 230000002035 prolonged effect Effects 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/08—Sliding-contact bearings for exclusively rotary movement for axial load only for supporting the end face of a shaft or other member, e.g. footstep bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/16—Sliding surface consisting mainly of graphite
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses an open type diamond tilting pad thrust bearing, which comprises a movable disc and a static disc; the movable disc comprises an annular movable disc substrate and diamond movable disc tiles; the static disc comprises a static disc substrate, diamond static disc tiles, tile gaskets and wave springs; the static disc substrate is an annular frame body with a cavity; the diamond static disc tiles are a plurality of in number and are uniformly embedded on one side end face of the static disc substrate; the diamond static disc tile can tilt and swing along the circumferential direction of the static disc matrix, and the section of the part protruding out of the end face of the static disc matrix is horseshoe-shaped and is attached to the diamond dynamic disc tile; the tile gasket attaching pad is arranged on the bottom surface of the diamond static disc tile and is used for supporting the diamond static disc tile; the wave spring is tightly propped between the bottom surface of the cavity of the static disc base body and the tile gasket. The invention greatly prolongs the service life of the bearing, reduces the starting torque of the bearing, has high temperature resistance, is convenient for manufacturing the small-diameter bearing, and can meet the requirements of small-diameter tool equipment such as underground power drilling tools and the like.
Description
Technical Field
The invention relates to the technical field of thrust bearings, in particular to an open type diamond tilting pad thrust bearing.
Background
Currently, tilt pad thrust bearings are often used in high thrust load rotary machines. Thrust loads are transferred from the sliding part to the stationary part through hydrodynamic oil films, and the tilting pad thrust bearing consists of a series of flat surfaces sliding on fixed tilting pads. The space between the flat surface and the inclined pad is filled with lubricating oil, which is sucked due to sliding of the flat surface.
The tilting pad thrust bearing is widely applied, and particularly, the application of the tilting pad thrust bearing in small-diameter tool equipment such as underground power drills becomes an urgent need, but the existing tilting pad thrust bearing still has the defects of low structural strength, large working torque, short service life and the like.
Therefore, how to provide a tilting pad thrust bearing capable of reducing working torque and prolonging working life is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides an open diamond tilting pad thrust bearing, which aims to solve the above technical problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
An open diamond tilting pad thrust bearing comprising: a movable disk and a stationary disk;
The movable disc comprises an annular movable disc substrate and a plurality of diamond movable disc tiles uniformly fixed on one side end surface of the movable disc substrate;
The static disc comprises a static disc substrate, diamond static disc tiles, tile gaskets and wave springs;
the static disc substrate is an annular frame body with a cavity;
The diamond static disc tiles are multiple in number and are uniformly embedded on one side end face of the static disc substrate; the diamond static disc tile can tilt and swing along the circumferential direction of the static disc substrate, and the section of the part protruding out of the end face of the static disc substrate is horseshoe-shaped and is attached to the diamond dynamic disc tile;
the tile gasket attaching pad is arranged on the bottom surface of the diamond static disc tile and used for supporting the diamond static disc tile;
The wave spring is tightly propped between the bottom surface of the cavity of the static disc substrate and the tile gasket.
Through the technical scheme, the diamond tile is adopted, so that the service life of the bearing is greatly prolonged; the wave spring is adopted, so that axial thrust can be uniformly transmitted, each tile can be ensured to uniformly bear the axial thrust, each static disc tile can be independently inclined and can work in a linkage way under the action of the wave spring, and the integrity and reliability of the bearing are greatly improved; meanwhile, the wave spring can absorb axial vibration, so that impact force is reduced, and the service life of the bearing is prolonged; the adopted static disc tile is U-shaped, so that the contact area of the dynamic disc and the static disc of the bearing is greatly reduced, the starting torque of the bearing is reduced, and meanwhile, the heat dissipation performance is good; the whole bearing adopts an open lubrication structure, has no rubber component, has simple structure and high temperature resistance, is convenient to manufacture into a small-diameter bearing, and can meet the requirements of small-diameter tool equipment such as underground power drilling tools and the like.
The wave spring has the function of supporting all the diamond static disc tiles through the tile gasket, so that the axial thrust can be uniformly transmitted, and each diamond static disc tile can be ensured to uniformly bear the axial thrust; under the elastic support of the wave spring, each diamond static disc tile can be inclined independently and can work in a linkage way under the action of the wave spring, so that the integrity and reliability of the bearing are greatly improved; meanwhile, the wave spring can absorb axial vibration, so that impact force is reduced, and service life of the bearing is prolonged.
Preferably, in the open diamond tilting pad thrust bearing, the stationary disc substrate comprises a bearing frame, an upper pressing ring and a lower pressing ring; the end face of one side of the bearing frame is provided with a square tile mounting hole for embedding the diamond static disc tile, and the end face of the other side of the bearing frame is of an opening structure and forms an annular groove with the side wall of the bearing frame for mounting the tile washer and the wave spring; the upper pressing ring is fixed on the end face of the bearing frame, provided with the square tile mounting hole in a matching manner, and is provided with a round hole corresponding to the square tile mounting hole; the lower pressure ring is fixed at the opening end of the annular groove in a sealing way. The static disc matrix formed by the bearing frame, the upper pressing ring and the lower pressing ring is convenient for the installation and the disassembly of the diamond static disc tile, the tile gasket and the wave spring.
Preferably, in the open diamond tilting pad thrust bearing, the diamond static disc tile comprises a tile base body and a horseshoe tile fixed on the tile base body; the tile substrate is of a cuboid structure and is embedded in the square tile mounting hole; the horseshoe-shaped tile passes through the round hole on the upper pressing ring. The tile base member is used for inlaying and establishes in square tile mounting hole, and the horseshoe-shaped tile is used for with diamond movable plate tile frictional contact.
Preferably, in the open diamond tilting pad thrust bearing, the tile base body is tightly matched with the inner wall of the square tile mounting hole along the radial direction of the bearing frame, and a movable gap exists along the circumferential direction. The diamond static disc tile can swing along the circumferential direction, fluid can enter the gaps between the diamond dynamic disc tile and the diamond static disc tile to form an oil film, the advantages of the tilting pad bearing are brought into play, the diamond static disc tile can swing obliquely along the circumferential direction, and when the wave spring fails, the rigid axial thrust can be born, the normal operation of the bearing is ensured, and therefore the service life and reliability of the bearing set are improved.
Preferably, in the open diamond tilting pad thrust bearing, a semicircular chamfer is formed at a notch of the top surface of the horseshoe-shaped tile. The diamond movable disc tile and the diamond static disc tile contact surfaces form wedge-shaped gaps, the movable disc drives lubricating fluid to form fluid accumulation at semicircular chamfer angles during high-speed rotation, a semi-closed high-pressure area is formed by the fluid accumulation, the lubricating fluid is more favorable for entering the diamond movable disc tile and the diamond static disc tile contact surfaces under the pressure action of the semi-closed high-pressure area, and therefore a liquid film is formed, friction resistance is reduced, and service life is prolonged.
Preferably, in the open diamond tilting pad thrust bearing, the size of the circular hole is smaller than the size of the square tile mounting hole. Preventing the diamond static plate tile from falling out.
Preferably, in the open diamond tilting pad thrust bearing, the diamond movable disc tile is a circular diamond compact, and the diamond stationary disc tile is a diamond compact. The integrity is good, and the reliability is strong.
Preferably, in the open diamond tilting pad thrust bearing, the diameters of the movable disc substrate and the static disc substrate are the same. The structural integrity is strong.
Compared with the prior art, the open type diamond tilting pad thrust bearing has the following beneficial effects:
1. and the service life of the bearing is greatly prolonged by adopting the diamond tilting tile.
2. By adopting the wave spring, the axial thrust is uniformly transmitted, each diamond static disc tile can be independently inclined and also can work in a linkage way under the action of the wave spring, and the integrity and the reliability of the bearing are greatly improved.
3. The diamond static disc tile is U-shaped, so that the contact area of the dynamic disc and the static disc is reduced, and the starting and working torque is reduced; the tile substrate is cuboid, the tile substrate and the square tile mounting holes are tightly mounted and matched along the radial direction, gaps are reserved along the circumferential direction, and the diamond static disc tile can tilt and swing along the circumferential direction, so that an oil film is formed more easily, and the advantages of the tilting pad bearing are exerted;
4. the diamond static disc tile is provided with a semicircular chamfer, and when the bearing rotates at a high speed, a semi-closed high-pressure area is formed at the semicircular chamfer, so that a liquid film is formed, the working torque is reduced, and the working life is prolonged;
5. The whole bearing adopts an open lubrication structure, has no rubber component, has simple structure and high temperature resistance, is convenient to manufacture into a small-diameter bearing, and can meet the requirements of small-diameter tool equipment such as underground power drilling tools and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure provided by the present invention;
FIG. 2 is a schematic diagram of a structure of a movable disk provided by the invention;
FIG. 3 is a schematic structural view of a static disc provided by the invention;
FIG. 4 is a schematic diagram of a semi-sectional structure of a static disc provided by the invention;
FIG. 5 is a schematic view of a diamond static disc tile according to the present invention;
FIG. 6 is a schematic view of the structure of the upper press ring provided by the invention;
fig. 7 is a schematic structural view of a bearing frame according to the present invention.
Wherein:
1-a movable disc;
11-a movable disk substrate;
12-diamond movable disc tiles;
2-static plate;
21-a static disc substrate;
211-bearing brackets;
2111-square tile mounting holes;
2112-annular groove;
212-pressing ring;
2121-round holes;
213-pressing ring;
22-diamond static disc tile;
221-tile substrate;
222-horseshoe tile;
2221-semi-circular chamfer;
23-tile washers;
24-wave spring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 7, an embodiment of the present invention discloses an open diamond tilting pad thrust bearing, comprising: a movable disk 1 and a static disk 2;
The movable disc 1 comprises an annular movable disc base body 11 and a plurality of diamond movable disc tiles 12 uniformly fixed on one side end surface of the movable disc base body 11;
The static disc 2 comprises a static disc base 21, diamond static disc tiles 22, tile washers 23 and wave springs 24;
The static disc base 21 is an annular frame body with a cavity;
The diamond static disc tiles 22 are a plurality of and are uniformly embedded on one side end surface of the static disc matrix 21; the diamond static disc tile 22 can tilt and swing along the circumferential direction of the static disc matrix 21, and the section of the end face part protruding out of the static disc matrix 21 is horseshoe-shaped and is attached to the diamond dynamic disc tile 12;
the tile gasket 23 is attached to the bottom surface of the diamond static disc tile 22 and is used for supporting the diamond static disc tile 22;
The wave spring 24 is pressed against the bottom surface of the cavity of the static disc base 21 and the tile washer 23.
In order to further optimize the technical solution, the stationary disc base 21 comprises a bearing bracket 211, an upper pressing ring 212 and a lower pressing ring 213; a square tile mounting hole 2111 for embedding the diamond static disc tile 22 is formed in one side end surface of the bearing frame 211, the other side end surface is of an opening structure, and an annular groove 2112 for mounting the tile washer 23 and the wave spring 24 is formed with the side wall of the square tile mounting hole; the upper press ring 212 is fixed on the end surface of the bearing frame 211 with the square tile mounting hole 2111 in a matching way, and a round hole 2121 corresponding to the square tile mounting hole 2111 is formed; the lower pressure ring 213 is sealingly secured to the open end of the annular groove 2112.
To further optimize the solution described above, diamond electrostatic disc tile 22 comprises a tile base 221, and horseshoe-shaped tiles 222 secured to tile base 221; the tile base 221 has a cuboid structure and is embedded in the square tile mounting hole 2111; the horseshoe-shaped tile 222 passes through a circular aperture 2121 in the upper press ring 212.
To further optimize the solution described above, the tile base 221 is tightly fitted with the inner wall of the square tile mounting hole 2111 in the radial direction of the bearing frame 211, with a clearance in the circumferential direction.
To further optimize the solution described above, a semi-circular chamfer 2221 is formed at the notch in the top surface of the horseshoe-shaped tile 222.
To further optimize the solution described above, the contact surfaces of diamond rotor tile 12 and horseshoe tile 222 form a wedge gap.
To further optimize the solution described above, the size of the circular hole 2121 is smaller than the size of the square tile mounting hole 2111.
To further optimize the solution described above, the diamond rotor tile 12 is a circular diamond compact.
To further optimize the solution described above, the diamond conditioner tile 22 is a diamond compact.
In order to further optimize the above technical solution, the diameters of the movable disk base 11 and the stationary disk base 21 are the same.
The working principle of the invention is as follows:
When in operation, the movable disc 1 is in parallel contact with the static disc 2, and the contact surfaces are the surfaces of horseshoe-shaped tiles 222 in the diamond movable disc tile 12 and the diamond static disc tile 22 respectively; the dynamic disc 1 rotates at a high speed to drive lubricating fluid to form fluid accumulation at the semicircular chamfer 2221, the fluid accumulation forms a semi-closed high-pressure area, and under the pressure action of the semi-closed high-pressure area, the fluid enters the contact surface through the semicircular chamfer 2221 to form a liquid film, so that friction resistance is reduced, and bearing life is prolonged; the diamond static disc tile 22 can incline under the action of the axial thrust and the wave spring 24, and transmits the axial thrust to the wave spring 24; the wave spring 24 uniformly transmits the axial thrust to the diamond static disc tile 22, and the linkage effect of all the diamond static disc tiles 22 is improved.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. An open diamond tilting pad thrust bearing, comprising: a movable disc (1) and a static disc (2);
The movable disc (1) comprises an annular movable disc base body (11) and a plurality of diamond movable disc tiles (12) uniformly fixed on one side end surface of the movable disc base body (11);
The static disc (2) comprises a static disc base body (21), diamond static disc tiles (22), tile gaskets (23) and wave springs (24);
the static disc base body (21) is an annular frame body with a cavity;
The number of the diamond static disc tiles (22) is multiple, and the diamond static disc tiles are uniformly embedded on one side end face of the static disc substrate (21); the diamond static disc tile (22) can tilt and swing along the circumferential direction of the static disc substrate (21), and the section of the part protruding out of the end face of the static disc substrate (21) is horseshoe-shaped and is attached to the diamond dynamic disc tile (12);
the tile gasket (23) is attached to the bottom surface of the diamond static disc tile (22) and used for supporting the diamond static disc tile (22);
the wave spring (24) is tightly propped between the bottom surface of the cavity of the static disc base body (21) and the tile gasket (23);
The static disc base body (21) comprises a bearing bracket (211), an upper pressing ring (212) and a lower pressing ring (213); a square tile mounting hole (2111) for embedding the diamond static disc tile (22) is formed in the end face of one side of the bearing frame (211), the end face of the other side is of an opening structure, and an annular groove (2112) for mounting the tile washer (23) and the wave spring (24) is formed between the end face of the other side and the side wall of the bearing frame; the upper pressing ring (212) is fixed on the end face of the bearing frame (211) with the square tile mounting hole (2111) in a matching mode, and a round hole (2121) corresponding to the square tile mounting hole (2111) is formed; the lower pressing ring (213) is fixed at the opening end of the annular groove (2112) in a sealing way;
The diamond static disc tile (22) comprises a tile base (221) and a horseshoe-shaped tile (222) fixed on the tile base (221); the tile substrate (221) is of a cuboid structure and is embedded in the square tile mounting hole (2111); the horseshoe-shaped tile (222) passes through the round hole (2121) on the upper pressing ring (212);
The tile base body (221) is tightly matched with the inner wall of the square tile mounting hole (2111) along the radial direction of the bearing frame (211), and a movable gap exists along the circumferential direction;
A semicircular chamfer (2221) is formed at the notch of the top surface of the horseshoe-shaped tile (222);
The contact surfaces of the diamond movable disc tile (12) and the horseshoe-shaped tile (222) form a wedge-shaped gap;
The size of the round hole (2121) is smaller than the size of the square tile mounting hole (2111);
the diamond movable plate tile (12) is a round diamond composite sheet.
2. An open diamond tilting pad thrust bearing according to claim 1 wherein the diamond stationary disc tile (22) is a diamond compact.
3. An open diamond tilting pad thrust bearing according to claim 1, characterized in that the diameters of the movable disc substrate (11) and the stationary disc substrate (21) are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356738.7A CN111486172B (en) | 2020-04-29 | 2020-04-29 | Open type diamond tilting pad thrust bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356738.7A CN111486172B (en) | 2020-04-29 | 2020-04-29 | Open type diamond tilting pad thrust bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111486172A CN111486172A (en) | 2020-08-04 |
| CN111486172B true CN111486172B (en) | 2024-04-30 |
Family
ID=71813155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010356738.7A Active CN111486172B (en) | 2020-04-29 | 2020-04-29 | Open type diamond tilting pad thrust bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111486172B (en) |
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| CN203285836U (en) * | 2013-06-17 | 2013-11-13 | 北京探矿工程研究所 | Bidirectional load sliding thrust bearing of hole bottom power drilling tool |
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| CN106351945A (en) * | 2016-10-27 | 2017-01-25 | 中国人民解放军海军工程大学 | Sectional rubber tilting-pad thrust bearing |
| CN109253159A (en) * | 2018-09-28 | 2019-01-22 | 中国船舶重工集团公司第七0三研究所 | Gas Turbine Power turbine reversely supports central bearing point tilting bush slide thrust bearing |
| CN110195741A (en) * | 2019-07-08 | 2019-09-03 | 恒力石化（大连）有限公司 | Off-gas expander tilting thrust bearing |
| CN212615889U (en) * | 2020-04-29 | 2021-02-26 | 北京探矿工程研究所 | Open type long-life tilting pad thrust bearing |
Family Cites Families (3)
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| US8646981B2 (en) * | 2011-04-19 | 2014-02-11 | Us Synthetic Corporation | Bearing elements, bearing assemblies, and related methods |
| US8545103B1 (en) * | 2011-04-19 | 2013-10-01 | Us Synthetic Corporation | Tilting pad bearing assemblies and apparatuses, and motor assemblies using the same |
| KR101819270B1 (en) * | 2014-12-24 | 2018-01-16 | 두산중공업 주식회사 | Tiliting pad thrust bearing and tiliting pad thrust bearing assembly |
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2020
- 2020-04-29 CN CN202010356738.7A patent/CN111486172B/en active Active
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| CN203285836U (en) * | 2013-06-17 | 2013-11-13 | 北京探矿工程研究所 | Bidirectional load sliding thrust bearing of hole bottom power drilling tool |
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| CN111486172A (en) | 2020-08-04 |
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