CN112128237B - Adjustable positioning rolling-sliding radial composite bearing - Google Patents
Adjustable positioning rolling-sliding radial composite bearing Download PDFInfo
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- CN112128237B CN112128237B CN202010992342.1A CN202010992342A CN112128237B CN 112128237 B CN112128237 B CN 112128237B CN 202010992342 A CN202010992342 A CN 202010992342A CN 112128237 B CN112128237 B CN 112128237B
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- 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
- F16C21/00—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
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- 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
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- 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
- F16C33/30—Parts of ball or roller bearings
- F16C33/34—Rollers; Needles
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- 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
- F16C33/72—Sealings
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- 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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention provides a radial rolling and sliding composite bearing with adjustable positioning, which belongs to the technical field of bearings and aims to improve the rigidity of the bearing and reduce the starting friction resistance, and the positioning of a rotor is adjustable, and the radial rolling and sliding composite bearing comprises the following components: the bearing seat is characterized in that a fixed bearing bush and a plurality of tilting bearing bushes which are distributed at intervals are arranged between the inner cylindrical surface of the bearing seat and the rotor, the fixed bearing bushes are fixed with the bearing seat, a pin hole is formed in the side wall of the bearing seat corresponding to the center of the back of each tilting bearing bush, the positions between the fixed bearing bushes and the adjacent tilting bearing bushes at intervals are provided with an elastic cylindrical roller with a center hole, a bush block fulcrum adjuster is fixed at each pin hole in the outer cylindrical surface of the bearing seat, two end surfaces of the bearing seat are respectively fixed with a baffle plate, mounting holes which are rotationally symmetrical about the central axis of the baffle plate are formed in the surface where the baffle plate is combined with the end surface of the bearing seat, and a cylindrical pin is arranged between the mounting holes which are opposite to the two baffle.
Description
Technical Field
The invention belongs to the technical field of bearings, relates to a composite bearing, and particularly relates to an adjustable positioning rolling-sliding radial composite bearing which is mainly used for radial support of a rotary mechanical rotor with large bearing capacity, high stability and controllable vibration, belongs to key parts for equipment and systems in the field of mechanical engineering, and can be used for rotary mechanical equipment systems in the industries of energy power, aerospace, petrochemical industry and the like.
Background
The horizontal rotor of the rotating mechanical equipment system in the industries of energy power, aerospace, petrochemical engineering and the like needs frequent positive and negative rotation and simultaneously bears large radial force and impact load, so a bearing needing to be installed at the end part of the rotor needs large bearing capacity and impact resistance, and the horizontal rotor has the characteristics of small starting friction resistance, adjustable positioning of the rotor, simple structure, long service life and the like.
In order to improve the bearing capacity and the shock resistance of the radial bearing, the existing radial bearing generally adopts a rolling-sliding composite form, which improves the bearing capacity and the shock resistance of the bearing to a certain extent, but due to the limitation of the rolling-sliding composite form, a new problem is introduced, and the phenomena of slipping, excessive wear and clamping of the bearing between a roller and a sliding block under the action of impact load can occur, so that the bearing is overheated, the vibration of a rotor is unstable, and other bearing faults can be caused. In addition, the hydrostatic bearing can well solve the problems of large friction resistance and stable operation of the rotor in the starting process, and the complexity of the bearing structure is increased due to the introduction of additional hydraulic equipment.
For example, as the invention patent with patent number CN 102494021B entitled "oil-lubricated rolling bearing with elastic roller", a rolling composite bearing with sliding blocks and rollers distributed alternately between inner and outer rings and moving relatively with the inner and outer rings is disclosed, the structure of which is equivalent to that of the original radial rolling bearing, and part of the rollers are replaced by sliding blocks. In the rolling-sliding composite bearing, the roller and the slider of the rolling-sliding bearing move together between the inner raceway and the outer raceway, and because the sliding of the slider in the raceway always lags compared with the raceway and the roller, the roller usually slips and is extruded in situ, but not synchronously rolls along with the inner ring and the outer ring, and the slipping and extruding phenomena usually cause excessive wear and seizure of the bearing under the action of impact load, finally cause overheating of the bearing, lubrication failure and rotor vibration, cause bearing failure and influence on the service life of the bearing.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides an adjustable positioning rolling-sliding radial composite bearing, and aims to prolong the service life of the bearing by improving the running stability of a rotor system, reducing the heating of the bearing and reducing the possibility of bearing failure.
In order to achieve the purpose, the invention adopts the technical scheme that:
a radial rolling and sliding composite bearing with adjustable positioning comprises a cylindrical bearing seat 1, wherein fixed bearing bushes 3 and N tilting bearing bushes 4 which are distributed at intervals are arranged between an inner cylindrical surface of the bearing seat 1 and a rotor, N belongs to {2,3,4}, the fixed bearing bushes 3 are fixed with the bearing seat 1, pin holes are formed in the side wall of the bearing seat 1 corresponding to the center of the back of each tilting bearing bush 4, and elastic cylindrical rollers 5 with center holes are respectively arranged at the intervals of the fixed bearing bushes 3 and the adjacent tilting bearing bushes 4 and at the intervals of the adjacent tilting bearing bushes 4;
a pad fulcrum adjuster 7 is fixed at each pin hole on the outer cylindrical surface of the bearing seat 1, and each pad fulcrum adjuster 7 comprises a supporting frame 71, an elastic moving plate 72, an elastic scissor frame 73 and a pad fulcrum 74; the supporting frame 71 is of a U-shaped structure, sliding grooves are formed in the inner sides of the bottom end of the supporting frame and the inner sides of the two arms close to the opening end of the supporting frame, and adjusting bolts are installed at the positions, close to the bottom end, of the two arms of the supporting frame 71; a sliding groove is formed in one side surface of the elastic moving plate 72; the elastic scissor frame 73 adopts two elastic support rod structures which are mutually crossed and hinged; the tile supporting point 74 adopts a columnar structure with a rectangular cross section; two ends of the elastic moving plate 72 are placed in sliding grooves which are arranged at the positions, close to the opening ends, of the inner sides of two arms of the U-shaped structure of the supporting frame 71, one ends of two elastic supporting rods of the elastic scissor frame 73 are placed in the sliding grooves at one side of the elastic moving plate 72, the other ends of the two elastic supporting rods are placed in the sliding grooves which are arranged at the inner side of the bottom end of the U-shaped structure of the supporting frame 71, one ends of the shoe fulcrums 74 are in contact with the elastic moving plate 72, and the other ends of the shoe fulcrums penetrate through pin;
the two end faces of the bearing seat 1 are respectively fixed with an annular baffle 2, the surface of the baffle 2 combined with the end face of the bearing seat 1 is provided with N +1 mounting holes which are rotationally symmetrical about the central axis of the baffle 2, and cylindrical pins 6 are mounted in the mounting holes opposite to the two baffles 2 and used for realizing the rolling of the elastic cylindrical rollers 5 nested on the baffles and the rotor.
In the radial rolling-sliding composite bearing with adjustable positioning, the curvature radius of the fixed bearing bush 3 is the same as that of the tilting bearing bush 4.
In the radial rolling and sliding composite bearing with adjustable positioning, the tilting pad 4 is provided with a limiting sink pit at the contact position of the pad back and the end face of the pad pivot 74, and a pad back support block 75 is arranged between the tilting pad 4 and the upper end face of the pad pivot 74.
In the radial rolling and sliding composite bearing with adjustable positioning, the baffle 2 is provided with the sealing ring at the joint part with the rotor.
In the above adjustable positioning radial rolling-sliding composite bearing, the geometric structure of the elastic cylindrical roller 5 is a cylinder, a drum-shaped cylinder or an ellipsoid.
Compared with the prior art, the invention has the following advantages:
1. the elastic cylindrical roller is nested on the cylindrical pin, the cylindrical pin is arranged in the mounting holes corresponding to the two baffles, the fixed bearing bush is fixed with the bearing seat, and the tilting bearing bush is supported and positioned through the bush block fulcrum adjuster, so that the elastic cylindrical roller, the fixed bearing bush and the tilting bearing bush are strictly separated, the phenomena of excessive abrasion and seizure of the bearing caused by the sliding and extrusion of the roller under the action of impact load are avoided, the running stability of a rotor system and the reliability of the bearing are improved, the possibility of bearing failure is reduced, and compared with the prior art, the service life of the bearing is effectively prolonged.
2. The bearing seat is characterized in that a bearing block pivot adjuster for adjusting the radial position of a tilting bearing bush is fixed on the outer surface of the bearing seat, the radial position of a rotor and a gap between the rotor and the bearing bush can be finely adjusted, the precise positioning of the rotor and the reliable oil film thickness between the rotor and the bearing bush are ensured, the dynamic pressure lubrication is effectively realized, the rotation precision of the rotor and the wear reduction and wear resistance of the bearing bush are improved, and compared with the prior art, the bearing seat further prolongs the service life of a bearing.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a radial cross-sectional view of FIG. 1;
fig. 3 is a schematic structural view of the pad pivot adjuster of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
referring to fig. 1 and 2, the present invention includes a cylindrical bearing housing 1, wherein fixed bearing pads 3 and N tilting bearing pads 4 are disposed between an inner cylindrical surface and a rotor, the fixed bearing pads 3 are fixed to the bearing housing 1, a pin hole is disposed at a position on a side wall of the bearing housing 1 corresponding to a pad back center of each tilting bearing pad 4, and elastic cylindrical rollers 5 having central holes are disposed at alternate positions of the fixed bearing pads 3 and adjacent tilting bearing pads 4 and alternate positions of the adjacent tilting bearing pads 4, respectively. And a pad fulcrum adjuster 7 is fixed at each pin hole on the outer cylindrical surface of the bearing seat 1 and used for positioning and adjusting the radial position of the tilting bearing pad 4. The curvature radius of the fixed bearing bush 3 is the same as that of the tilting bearing bush 4. The tilting pad 4 is provided with a limiting sinking pit at the contact position of the pad back and the end face of the pad pivot 74, the sinking pit is located at the midpoint of the pad back of the tilting pad 4, and a pad back supporting block 75 is arranged between the tilting pad 4 and the upper end face of the pad pivot 74.
The two end faces of the bearing seat 1 are respectively fixed with an annular baffle 2, a sealing ring for preventing lubricating oil from leaking is arranged at the joint part of the annular baffle 2 and the rotor, N +1 mounting holes which are rotationally symmetrical about the central axis of the baffle 2 are arranged on the surface of the baffle 2 combined with the end face of the bearing seat 1, and cylindrical pins 6 are arranged in the mounting holes corresponding to the two baffle 2 and used for realizing the rolling of the elastic cylindrical rollers 5 nested on the baffle and the rotor.
According to the difference of the diameter of the rotor and the stress condition of the bearing, the central angle occupied by the fixed bearing bush 3 is selected within the range of 120-180 degrees, the central angle occupied by the tilting bearing bush 4 is selected within the range of 60-90 degrees, and the number of the tilting bearing bushes 4 is N, wherein N belongs to {2,3,4 }. The number of the elastic cylindrical rollers 5 is N +1, and the structure can be a drum-shaped cylinder, a cylinder or an ellipsoid. In the present embodiment, the central angle of the fixed pad 3 is 160 °, the central angle of the tilting pad 4 is 75 °, and N is 2.
As shown in fig. 2, 2 tilting pads 4 are respectively mounted on the inner cylindrical surface of the bearing housing 1 along the x and y directions, and the mounting position of the fixed pad 3 is opposite to the position of the 2 tilting pads 4 and fixed by bolts, so as to realize sliding with the rotor.
In the starting process of the rotor, the surface of the rotor is attached to the cylindrical surface formed by the 3 elastic cylindrical rollers 5 and the fixed bearing bush 3, the rotor is started in a running mode with both rolling friction and sliding friction, the starting process is stable, and the friction force is small. When the rotor is subjected to large radial force, the elastic cylindrical roller 5 is compressed to generate elastic deformation, and the rotor runs on a cylindrical surface consisting of the fixed bearing bush 3 and the 2 tilting pad bearing bushes 4 in a sliding mode, so that the bearing capacity of the bearing is improved. Because the fixed bearing bush 3 is fixed on the inner cylindrical surface of the bearing seat 1, the tilting bearing bush 4 is supported and positioned through the bush block fulcrum adjuster 7, and the elastic cylindrical roller 5 is nested on the cylindrical pin 6, the fixed bearing bush 3, the radial tilting bearing bush 4 and the elastic cylindrical roller 5 are strictly separated, the phenomena of mutual extrusion, slipping and clamping between the roller and the sliding block are avoided, the failure rate of support is reduced, and the service life of the bearing is prolonged.
And a pad pivot adjuster 7 is fixed at each pin hole on the outer cylindrical surface of the bearing seat 1, namely, along the x and y directions of the bearing seat 1, and is used for positioning and adjusting the radial position of the tilting bearing bush 4, adjusting the radial position of the rotor and ensuring the reliable oil film thickness between the bearing bush and the rotor.
The pad fulcrum adjuster 7 is structurally shown in fig. 3, and includes a support frame 71, an elastic moving plate 72, an elastic scissor frame 73 and a pad fulcrum 74; the supporting frame 71 is of a U-shaped structure, sliding grooves are formed in the inner sides of the bottom end of the supporting frame and the inner sides of the two arms close to the opening end of the supporting frame, and adjusting bolts are installed at the positions, close to the bottom end, of the two arms of the supporting frame 71; a sliding groove is formed in one side surface of the elastic moving plate 72; the elastic scissor frame 73 adopts two elastic support rod structures which are mutually crossed and hinged; the tile supporting point 74 adopts a columnar structure with a rectangular cross section; the two ends of the elastic moving plate 72 are placed in the sliding grooves arranged at the positions close to the opening ends on the inner sides of the two arms of the U-shaped structure of the supporting frame 71, one end of each of the two elastic supporting rods of the elastic scissor frame 73 is placed in the sliding groove on one side of the elastic moving plate 72, the other end of each of the two elastic supporting rods is placed in the sliding groove arranged on the inner side of the bottom end of the U-shaped structure of the supporting frame 71, one end of the pad fulcrum 74 is in contact with the elastic moving plate 72, and the other end of the pad fulcrum 74 penetrates through the pin.
Wherein, the process that the pad pivot adjuster 7 adjusts the radial position of the tilting bearing pad 4 is as follows: the opening and closing angle of the shearing edge of the elastic shearing frame 73 is adjusted through two adjusting bolts arranged at the bottom end of the U-shaped frame of the supporting frame 71, the two ends of the elastic shearing frame 73 can push the elastic moving plate 72 to move in sliding grooves which are arranged at the positions close to the opening ends on the inner sides of two arms of the U-shaped structure of the supporting frame 71, so that the distance between the bottom end of the U-shaped frame of the supporting frame 71 and the elastic moving plate 72 is changed, and the elastic moving plate 72 pushes the radial pad supporting point 74 to change the radial position of the tilting.
The shape structure of the pad fulcrum 74 is similar to the columnar structure of a common flat key, and the contact surfaces of the pad fulcrum 74 and the elastic moving plate 72 and the pad back supporting block 75 are all arc surface contacts. The elastic moving plate 72 and the elastic shear frame 71 are elastic elements, and can buffer the impact load from the rotor borne by the tilting pads 4. The rigidity of the tile fulcrum regulator 7 and the oil film rigidity are in a series relation, so that the nonlinearity of the oil film rigidity is reduced, and the stability of the rotor operation is improved. In addition, the bolt adjustment is stepless adjustment, and the adjustment of any height of the tilting bearing bush 4 can be realized.
The lubricating mode of the bearing adopts an oil lubricating mode.
Claims (5)
1. The adjustable-positioning radial rolling-sliding composite bearing is characterized by comprising a cylindrical bearing seat (1), wherein fixed bearing bushes (3) and N tilting bearing bushes (4) are arranged between an inner cylindrical surface and a rotor, and N belongs to {2,3 and 4}, wherein the fixed bearing bushes (3) are fixed with the bearing seat (1), N pin holes are formed in the side wall of the bearing seat (1), each pin hole corresponds to the center of a bush back of each tilting bearing bush (4), and elastic cylindrical rollers (5) with center holes are respectively arranged at the alternate positions of the fixed bearing bushes (3) and the adjacent tilting bearing bushes (4) and the alternate positions of the adjacent tilting bearing bushes (4);
a pad fulcrum adjuster (7) is fixed at each pin hole on the outer cylindrical surface of the bearing seat (1), and each pad fulcrum adjuster (7) comprises a supporting frame (71), an elastic moving plate (72), an elastic scissor frame (73) and a pad fulcrum (74); the supporting frame (71) is of a U-shaped structure, sliding grooves are formed in the inner sides of the bottom end of the supporting frame and the inner sides of the two arms close to the opening end of the supporting frame, and adjusting bolts are installed at the positions, close to the bottom end, of the two arms of the supporting frame (71); a sliding groove is formed in one side face of the elastic moving plate (72); the elastic scissor frame (73) adopts two elastic supporting rod structures which are mutually crossed and hinged; the tile supporting point (74) adopts a columnar structure with a rectangular cross section; the two ends of the elastic moving plate (72) are placed in sliding grooves which are arranged at the positions, close to the opening ends, of the inner sides of two arms of a U-shaped structure of the supporting frame (71), one ends of two elastic supporting rods of the elastic scissor frame (73) are placed in the sliding grooves at one side of the elastic moving plate (72), the other ends of the two elastic supporting rods are placed in the sliding grooves which are arranged at the inner sides of the bottom end of the U-shaped structure of the supporting frame (71), one ends of the tile fulcrums (74) are in contact with the elastic moving plate (72), and the other ends of the tile fulcrums penetrate through pin holes which are formed in the side;
the bearing seat is characterized in that two end faces of the bearing seat (1) are respectively fixed with a circular ring-shaped baffle (2), N +1 mounting holes which are rotationally symmetrical about the central axis of the baffle (2) are formed in the surface where the baffle (2) is combined with the end face of the bearing seat (1), and cylindrical pins (6) are mounted in the mounting holes, opposite to the two baffles (2), and are used for realizing rolling of elastic cylindrical rollers (5) and rotors which are nested on the baffle.
2. An adjustable positioning radial roller-slide compound bearing according to claim 1, characterized in that the fixed bearing shell (3) and the tilting bearing shell (4) have the same radius of curvature.
3. The adjustable radial rolling and sliding composite bearing according to claim 1, wherein the tilting pad (4) is provided with a limiting sink at the contact position of the pad back and the end face of the pad pivot (74), and a pad back support block (75) is arranged between the tilting pad (4) and the upper end face of the pad pivot (74).
4. An adjustable positioning radial rolling-sliding composite bearing according to claim 1, characterized in that the baffle (2) is provided with a sealing ring at the joint with the rotor.
5. An adjustable positioning radial rolling-sliding composite bearing according to claim 1, characterized in that the geometry of the resilient cylindrical rollers (5) is cylindrical, drum-shaped cylindrical or ellipsoidal.
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CN202010992342.1A CN112128237B (en) | 2020-09-21 | 2020-09-21 | Adjustable positioning rolling-sliding radial composite bearing |
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CN202010992342.1A CN112128237B (en) | 2020-09-21 | 2020-09-21 | Adjustable positioning rolling-sliding radial composite bearing |
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CN112128237B true CN112128237B (en) | 2021-06-25 |
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Families Citing this family (2)
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CN114198400B (en) * | 2021-11-26 | 2023-12-26 | 哈尔滨电气动力装备有限公司 | Radial bearing structure of shielding motor |
CN115182927B (en) * | 2022-08-03 | 2023-07-07 | 郑州机械研究所有限公司 | Self-adaptive working condition sliding bearing, gearbox and selection method |
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JP2012105432A (en) * | 2010-11-09 | 2012-05-31 | Minebea Co Ltd | Spherical motor |
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CN203892370U (en) * | 2014-05-21 | 2014-10-22 | 无锡杰尔压缩机有限公司 | Radial-direction-adjustable tilting pad bearing |
CN106015314A (en) * | 2016-07-28 | 2016-10-12 | 西安交通大学 | Rigidity adjustable radial sliding bearing with spring of tile block supporting point |
CN207364099U (en) * | 2017-08-31 | 2018-05-15 | 宜兴市环宇轴瓦制造有限公司 | A kind of novel high speed bearing shell |
CN211059196U (en) * | 2019-12-13 | 2020-07-21 | 诸暨市暨阳滑动轴承有限公司 | Novel double-arc self-adjusting tilting pad |
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