CN109707736B - Magnetic-hydraulic composite tilting pad radial bearing based on Halbach array - Google Patents
Magnetic-hydraulic composite tilting pad radial bearing based on Halbach array Download PDFInfo
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- CN109707736B CN109707736B CN201910151812.9A CN201910151812A CN109707736B CN 109707736 B CN109707736 B CN 109707736B CN 201910151812 A CN201910151812 A CN 201910151812A CN 109707736 B CN109707736 B CN 109707736B
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Abstract
The invention discloses a magnetic-hydraulic composite tilting pad radial bearing based on a Halbach array, which comprises a shaft sleeve, a bearing bush, a bearing shell and a stop retaining ring, wherein a first permanent magnet inner core is arranged in the shaft sleeve, a second permanent magnet inner core is arranged in the bearing bush, the magnetizing direction of the first permanent magnet inner core in the shaft sleeve is opposite to the magnetizing direction of the second permanent magnet inner core in the bearing bush, so that permanent magnet repulsive force exists between the shaft sleeve and the bearing bush, the bearing bush comprises a plurality of fan-shaped plate strip-shaped bearing bush units which are uniformly distributed in the circumferential direction, and an arc boss is arranged on the outer side of each fan-shaped plate strip-shaped bearing bush unit and is matched with an inwards concave arc groove arranged on. The invention provides the idea that permanent magnetic force and liquid film force share bearing load and a tilting pad structure, and the permanent magnetic repulsion force generated between inner cores of permanent magnets and the liquid film force provided by a lubricating liquid film share the load in the running process of the bearing. Meanwhile, the tilting pad structure enables lubricating liquid to be wedged into a friction pair gap more easily, and the running stability of the bearing is ensured.
Description
Technical Field
The invention belongs to the technical field of sliding bearings, and particularly relates to a magnetic-hydraulic composite tilting pad radial bearing based on a Halbach array.
Background
The tail bearing is an important component of a ship propulsion shaft system and plays a role in supporting a propeller shaft and a propeller. With the increase of the tonnage of the ship, the weight of the propeller and the propeller shaft is continuously increased, and higher requirements are put forward on the bearing capacity of the tail bearing. At present, the bearing shaft sleeve and the bearing bush are mainly combined by copper-rubber, copper-sialon or phylon, copper-alloy and metal materials, and the like, and in a bearing taking water as a lubricating medium, because the dynamic viscosity of the water is low, a good bearing water film is difficult to form at a certain rotating speed, particularly at a low rotating speed, so that sufficient bearing capacity is provided, and boundary lubrication and even dry friction are generated by direct contact between two friction pairs, so that the poor operation of the bearing is caused. Therefore, the design completely depending on the hydrodynamic lubrication is difficult to satisfy the severe working condition environment of low speed and heavy load.
In 1981, a french scientist Yonnet provided a permanent magnet magnetic suspension bearing structure, and carried out related researches on the bearing capacity and the like, which is regarded as the beginning of the modern permanent magnet bearing research. The permanent magnet bearing is a non-contact bearing which separates a rotor from a bearing surface by utilizing magnetic field force, has the advantages of no friction, no abrasion, no lubrication and the like, but the permanent magnet magnetized in a single direction is easy to generate demagnetization, and the magnetic force provided by the bearing formed by the permanent magnet bearing is weak, so that a Halbach array magnetic structure is introduced into the permanent magnet bearing in recent years. The array structure is provided by doctor k.halbach in the national laboratory of lawrence berkeley, and by arranging the permanent magnets in different magnetizing directions according to a certain rule, magnetic lines of force can be converged on one side of the magnets, and the magnetic lines of force are weakened on the other side, so that an ideal unilateral magnetic field is obtained to increase the interaction force between the permanent magnets.
Based on the technical background, the invention provides the permanent magnet magnetic-hydraulic composite bearing based on the Halbach array, wherein the load is borne by the water film force and the permanent magnetic force together, and the bearing bush of the bearing is of a tilting bush structure, so that the water film forming capacity can be further improved, and the bearing bush is suitable for the low-speed heavy-load working condition.
Disclosure of Invention
The invention aims to solve the technical problem of providing a magnetic-hydraulic composite tilting pad radial bearing based on a Halbach array, which can improve the capability of forming a water film and adapt to the low-speed heavy-load working condition, aiming at the defects in the prior art.
The technical scheme adopted by the invention is as follows: the utility model provides a compound tilting pad radial bearing of magnetic fluid based on Halbach array, includes axle sleeve, axle bush, bearing housing and locking retaining ring, its characterized in that: the bearing comprises a shaft sleeve, and is characterized in that a first permanent magnet inner core is arranged in the shaft sleeve, the first permanent magnet inner core is magnetized in the radial direction and the axial direction respectively and is arranged according to a Halbach linear array, a second permanent magnet inner core is arranged in the bearing bush, the second permanent magnet inner core is magnetized in the radial direction and the axial direction respectively and is arranged according to the Halbach linear array, the magnetizing direction of the first permanent magnet inner core in the shaft sleeve is opposite to the magnetizing direction of the second permanent magnet inner core in the bearing bush, so that permanent magnetic repulsion force exists between the shaft sleeve and the bearing bush, the bearing bush comprises a plurality of fan-shaped plate strip-shaped bearing bush units which are uniformly distributed in the circumferential direction, an arc boss is arranged on the outer side of each fan-shaped strip.
According to the technical scheme, a pin hole is formed in the end face of the fan-shaped strip bearing bush unit in the direction of the central line of the arc boss, the stop check ring is provided with the pin hole, the bearing shell and the stop check ring are fixed through a fixing piece, and the fan-shaped strip bearing bush unit and the stop check ring are limited through a bolt, so that the fan-shaped strip bearing bush unit can swing around the arc boss.
According to the technical scheme, the radius of the concave arc groove in the bearing shell is r2The fillet is α, and the radius of the circular arc boss of the fan-shaped lath-shaped bearing bush unit is r1The rounded corner is β, wherein r1＜r2,α＜β。
According to the technical scheme, the angle theta between the center of the circular arc boss and the boundary of the tile1The ratio of the total area to the tile wrap angle theta is about 0.6 to 0.7.
According to the technical scheme, the shaft sleeve comprises a cylindrical copper shell, the first permanent magnet inner core is of a circular ring structure, and the plurality of first permanent magnets are axially arranged in an annular cavity of the copper shell.
According to the technical scheme, the annular first permanent magnet inner core is formed by splicing a plurality of radial magnetizing fan-shaped blocks.
According to the technical scheme, each fan-shaped plate strip bearing bush unit comprises a bush surface layer and a fan-shaped second permanent magnet inner core, when the bush surface layer is made of rubber materials or babbit metal, a fan-shaped plate strip bearing bush base body is further arranged, the bush surface layer and the second permanent magnet inner core are vulcanized into a whole or directly electroplated and coated on the periphery of the permanent magnet inner core, the inner side of the bush base body is tightly connected with the bush surface layer, and an arc boss is arranged on the outer side of the bush base body and matched with an inner concave arc groove arranged on a bearing shell to form a tilting bush structure.
According to the technical scheme, each fan-shaped plate strip-shaped bearing bush unit comprises a fan-shaped bearing bush surface layer and a fan-shaped second permanent magnet inner core, when the bearing bush surface layer is made of a Sailong or Feilong high polymer material, the fan-shaped second permanent magnet inner core is fixedly arranged in a fan-shaped stainless steel shell, the inner side of the stainless steel shell is bonded with the fan-shaped bearing bush surface layer, and an arc boss is arranged on the outer side of the stainless steel shell and matched with an inner concave arc groove arranged on a bearing shell to form a tilting bush structure.
According to the technical scheme, each fan-shaped plate strip-shaped bearing bush unit comprises a fan-shaped bearing bush surface layer and a fan-shaped second permanent magnet inner core, when the bearing bush surface layer is made of metal materials which are not magnetic-conductive, such as copper and stainless steel, the bearing bush surface layer supports a fan-shaped block shell structure, the second permanent magnet inner core is embedded into the bearing bush surface shell and sealed by a cover plate, and an arc boss is arranged on the outer side of the bearing bush surface layer and matched with an inner concave arc groove arranged on a bearing shell to form a tilting bush structure.
The beneficial effects obtained by the invention are as follows:
1. the bearing has simple structure and convenient maintenance
The whole bearing only comprises components such as a shaft sleeve, a bearing bush, a bush base body, a stop ring and a bearing shell, and the structure is simple. The circular arc boss at the bottom of the tile base body is in contact fit with the semi-arc groove of the bearing shell, the taper pin and the stop check ring are combined to fix the lath in the axial direction and the circumferential direction, the taper pin can be pulled out by the pin puller if a certain lath is damaged in the using process of the bearing, the stop check ring is disassembled to pull out the lath for replacement, and the whole bearing is not required to be disassembled in maintenance.
2. The bearing has high operation reliability
The tiltable tile structure can rotate along the rotating shaft to generate certain tilting in the operation process, so that lubricating liquid is more easily wedged into a small gap on the surface of the friction pair, and the formation of dynamic pressure lubrication is ensured. Compared with tilting pad structures with point support and spherical support, the tilting pad structure with the circular arc boss matched with the groove has larger radial rigidity at the position of the pivot point, and therefore structural guarantee is provided for stable operation of the bearing under the working conditions of large load and low rotating speed. Meanwhile, the inner cores of the permanent magnets are arranged in a Halbach array, and one side of each permanent magnet is enabled to gather magnetic lines of force, and the other side of each permanent magnet is weakened with the magnetic lines of force, so that the self-generated shielding effect is achieved, and poor operation caused by magnetization of related components is prevented.
3. The bearing has better lubricating property and larger bearing capacity
The bearing bush adopts the mounting mode of laths, and a gap exists between two adjacent bush surfaces, so that lubricating liquid can enter the surface of the friction pair to generate good dynamic pressure lubrication for bearing, and meanwhile, the gaps can accumulate impurities in water and are brought out by the lubricating liquid in the running process of the bearing to ensure the normal lubrication of the bearing. The Halbach array-based permanent magnets exist in the shaft sleeve and the bearing bush, large magnetic force is generated between the bearing bush and the shaft sleeve under small clearance, the magnetic force and liquid film force jointly bear load, and bearing capacity is improved under the condition that the size of the bearing is not changed.
Drawings
Fig. 1 is a schematic view of a bearing assembly according to a first embodiment of the present invention.
Fig. 2a and 2b are schematic structural views of a shaft sleeve according to a first embodiment of the invention.
Fig. 3 is a cross-sectional view of a bearing insert according to an embodiment of the present invention.
Fig. 4 and 5 are schematic structural diagrams of a tile substrate according to an embodiment of the present invention.
FIG. 6 is a schematic view of the shoe base and bearing housing in accordance with one embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a bearing housing according to an embodiment of the present invention.
Fig. 8 is a schematic structural view of a stop collar according to a first embodiment of the present invention.
Fig. 9a and 9b are schematic structural diagrams of a second embodiment of the present invention.
Fig. 10a and 10b are schematic structural diagrams of a second embodiment of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
The first embodiment is as follows:
as shown in fig. 1, the embodiment provides a magnetic-hydraulic composite tilting pad radial bearing based on a Halbach array, which includes a shaft sleeve 1, a bearing bush 2, a bearing housing 3 and a stop collar 4, wherein the shaft sleeve 1 is fixed on a rotating shaft to form a pair of friction pairs with the bearing bush, and the bearing bush 2 is used for bearing a bearing load.
The bearing comprises a shaft sleeve and is characterized in that a first permanent magnet inner core is arranged in the shaft sleeve, the first permanent magnet inner core is magnetized in the radial direction and the axial direction respectively and is arranged according to a Halbach linear array, a second permanent magnet inner core is arranged in the bearing bush, the second permanent magnet inner core is magnetized in the radial direction and the axial direction respectively and is arranged according to the Halbach linear array, the magnetizing direction of the first permanent magnet inner core in the shaft sleeve is opposite to the magnetizing direction of the second permanent magnet inner core in the bearing bush, permanent magnetic repulsion force exists between the shaft sleeve and the bearing bush, and the generated permanent magnetic repulsion force and water film force generated by dynamic pressure lubrication share bearing load together. The bearing bush comprises a plurality of fan-shaped plate strip-shaped bearing bush units which are uniformly distributed in the circumferential direction, an arc boss 204 which is arranged in the axial direction is arranged on the outer side of each fan-shaped plate strip-shaped bearing bush unit, a pin hole 205 is formed in the end face of each fan-shaped plate strip-shaped bearing bush unit in the direction of the central line of the arc boss, the pin is inserted into the pin hole 205 to realize the axial, circumferential and radial positioning of the fan-shaped plate strip-shaped bearing bush units, and the arc boss 204 is matched with an inner concave arc groove 301 which is formed in the bearing.
In this embodiment, the bushing structure is as shown in fig. 2a, and is composed of three parts, namely a copper housing 101, a first permanent magnet core 102 and a cover plate 103. The first permanent magnet inner core 102 is embedded in the copper shell 101 and fixed by a cover plate 103 through screws, so as to achieve the purpose of isolating lubricating water. The first permanent magnet inner core 102 inside the shaft sleeve is formed by bonding a plurality of permanent magnet rings, each ring is pressed by rare earth materials and is magnetized in the radial direction and the axial direction, and finally the rings are arranged according to a linear Halbach array, wherein the arrow direction in figure 2a is the magnetizing direction of the permanent magnet blocks. For the permanent magnet inner core in the large-diameter shaft sleeve, the radial magnetization of the permanent magnet ring blocks forming the permanent magnet inner core is difficult, a ring combination mode is shown in fig. 2b, the permanent magnet inner core is formed by splicing a plurality of radial magnetized fan-shaped blocks, all the fan-shaped blocks are bonded by strong glue, and the arrow direction in the figure is the magnetization direction of a single radial permanent magnet block.
As shown in fig. 5, the radius of the concave arc groove 301 of the bearing housing is r2The fillet is α, and the radius of the circular arc boss 204 of the fan-shaped lath-shaped bearing bush unit is r1The rounded corner is β, wherein r1＜r2α < β DEG Angle theta of the center of the arc boss from the tile boundary1The ratio of the total area to the tile wrap angle theta is about 0.6 to 0.7.
As shown in fig. 3, each sector-shaped strip bearing shell unit includes a sector-shaped strip bearing shell layer 201 and a sector-shaped strip second permanent magnet inner core 202. The tile surface layer can be made of high polymer materials such as rubber, sialon, phylon and the like, and can also be made of metal materials such as babbitt metal, copper, stainless steel and the like. When the tile surface layer is made of high polymer materials, the bearing is suitable for the field of water lubrication; when the tile surface layer is made of metal materials, the bearing is suitable for the field of oil lubrication.
In this embodiment, the tile surface layer 201 is made of rubber or babbitt metal for illustration, and when the tile surface layer 201 is made of rubber or babbitt metal, a sector-shaped strip tile base 203 is further provided, as shown in fig. 4/5, the tile base in this embodiment is a sector structure cast by non-magnetic metal, the tile surface layer 201 and the second permanent magnet inner core are vulcanized into a whole or the tile surface layer is directly electroplated and coated on the periphery of the permanent magnet inner core, the inner side of the tile base 203 and the tile surface layer are bonded by strong glue, and the outer side is provided with an arc boss to cooperate with an inner concave arc groove provided on the bearing housing to form a tilting tile structure. The distance between the permanent magnet inner core and the shaft sleeve is determined according to the size of the bearing, the operation condition and the like.
As shown in fig. 4 and 5, the outer side of the tile base 203 is machined to have a radius r1The arc boss. The upper part of the boss is provided with a pin hole 205 along the central line of the bearing, and the angle theta between the center of the boss and the boundary of the tile1The ratio of the total area to the tile wrap angle theta is about 0.6 to 0.7. A boss at the bottom of the tile base body is matched with the inner circle groove of the bearing shell, and the tile base body is axially, radially and circumferentially positioned by using a stop check ring and a pin, so that the tile base body can swing around the boss in the working process to form an inclinable tile structure; the bearing base is mounted in a direction related to the direction of rotation of the shaft, wherein the angle of the center of the boss at the inlet of the lubricating liquid from the boundary of the bearing is theta1The arc boss at the lower part of the tile base 203 is embedded into the arc groove of the bearing shell, wherein the fillet of the arc boss at the lower part of the tile base is β, the fillet of the arc groove in the inner circle of the bearing shell is α, the eccentricity between the arc boss at the lower part of the tile base and the arc center of the arc groove of the bearing shell is e, and the connecting line of the two circle centers passes through the center of the bearing.
FIG. 7 shows the bearing housing structure, which is a hollow cylinder structure cast from carbon steel and having a radius r uniformly arranged in the inner circle2An arc-shaped groove 301 for positioning the bush base body and transmitting the radial force applied to the bush is processed along the central line of the bearing at the lower part of the grooveThere is a threaded hole 302 for securing a retaining collar.
As shown in fig. 8, the stop collar structure is machined from a stainless steel metal material. Countersunk through holes 402 and pin holes 402, which are through holes, are uniformly formed on the surface of the stop collar. A screw penetrates through the countersunk head through hole 402 and is screwed into a threaded hole of the bearing shell to axially fix the fan-shaped plate strip-shaped bearing bush unit; the taper pin is inserted into the stop check ring and the pin hole 205 of the fan-shaped strip bearing unit to limit the fan-shaped strip bearing unit in the radial direction and the axial direction, so that the fan-shaped strip bearing unit can swing around the arc boss 204 to form the tilting pad structure.
The invention provides a Halbach array-based quick-change tilting pad magnetic-liquid composite radial bearing, which comprises the following working processes:
the whole bearing is immersed in water, the shaft sleeve rotates anticlockwise along with the rotating shaft, a small gap exists between the surfaces of the two friction pairs due to the action of permanent magnetic force between the shaft sleeve and the bearing bush at the initial working stage of the bearing, and water is brought into a wedge-shaped gap formed by the lath and the shaft sleeve by the shaft sleeve to play roles of lubrication and bearing; when the bearing works stably, the water film force and the permanent magnet repulsion force are coordinated to bear load together. In the running process of the bearing, the tile surface layer is acted by fluid dynamic pressure, the lath generates certain inclination around the arc boss, so that a wedge-shaped angle is generated between the tile surface layer and the shaft sleeve, and the lubricating liquid can enter between the two friction pairs to generate a fluid dynamic pressure lubricating effect; when the rotating speed and the radial axial load of the tail shaft are changed, the liquid film force borne by the tile surface material layer is changed, and the inclined angle of the lath is changed along with the change of the liquid film force, so that the optimal wedge-shaped angle is generated between the tile surface material layer and the working surface of the shaft sleeve, and good hydrodynamic lubrication performance is generated.
Example two:
as shown in fig. 9, the second embodiment is substantially the same as the first embodiment, except that: the bearing bush structure, the bearing bush layer surface 201 of this embodiment is the material such as sialon dragon or graphite, and this bearing is mainly applicable to the oil lubrication field, and axle bush permanent magnet inner core sector piece Halbach array arrangement order is opposite with axle sleeve ring piece arrangement order, exists permanent magnetism repulsion between axle sleeve and the axle bush promptly, and the water film power that produces of permanent magnetism repulsion and dynamic pressure lubrication bears the bearing load jointly. The tile layer 201 is made into a fan-shaped block shell structure, and the second permanent magnet inner core 202 is embedded in a stainless steel shell 206 and fixedly sealed by a cover plate 207 through screws. The lath cancels a tile base structure, an arc boss is directly processed on the lower surface of the stainless steel shell 206, and the circular boss is matched with the inner circle semi-arc groove of the bearing shell to form an inclinable tile structure. The distance between the permanent magnet inner core and the shaft sleeve is determined according to the size of the bearing, the operation condition and the like.
Example three:
the structure of this embodiment is basically the same as that of the first embodiment, except that: the bearing bush is mainly suitable for the field of oil lubrication, the Halbach array arrangement sequence of the bearing bush permanent magnet inner core fan-shaped blocks is opposite to the arrangement sequence of the shaft sleeve circular ring blocks, namely, permanent magnet repulsion exists between the shaft sleeve and the bearing bush, and the generated permanent magnet repulsion and water film force generated by dynamic pressure lubrication share the bearing load. The tile surface layer 201 is made into a fan-shaped block shell structure, and the second permanent magnet inner core 202 is embedded into the tile surface shell 201 and is fixedly sealed through screws by the cover plate 207. The lath cancels a tile base structure, an arc boss is directly processed on the lower surface of the tile surface shell 201, and the arc boss is matched with an arc groove in the bearing shell to form a tilting tile structure. The distance between the permanent magnet inner core and the shaft sleeve is determined according to the size of the bearing, the operation condition and the like.
Claims (9)
1. The utility model provides a compound tilting pad radial bearing of magnetic fluid based on Halbach array, includes axle sleeve, axle bush, bearing housing and locking retaining ring, its characterized in that: the bearing comprises a shaft sleeve, and is characterized in that a first permanent magnet inner core is arranged in the shaft sleeve, the first permanent magnet inner core is magnetized in the radial direction and the axial direction respectively and is arranged according to a Halbach linear array, a second permanent magnet inner core is arranged in the bearing bush, the second permanent magnet inner core is magnetized in the radial direction and the axial direction respectively and is arranged according to the Halbach linear array, the magnetizing direction of the first permanent magnet inner core in the shaft sleeve is opposite to the magnetizing direction of the second permanent magnet inner core in the bearing bush, so that permanent magnetic repulsion force exists between the shaft sleeve and the bearing bush, the bearing bush comprises a plurality of fan-shaped plate strip-shaped bearing bush units which are uniformly distributed in the circumferential direction, an arc boss is arranged on the outer side of each fan-shaped strip.
2. A tilting pad radial bearing according to claim 1, wherein: the end face of the fan-shaped lathy bearing bush unit is provided with a pin hole in the direction of the central line of the arc boss, the stop check ring is provided with a pin hole, the bearing shell and the stop check ring are fixed through a fixing piece, and the fan-shaped lathy bearing bush unit and the stop check ring are limited through a bolt, so that the fan-shaped lathy bearing bush unit can swing around the arc boss.
3. A tilting pad radial bearing according to claim 2, wherein: the radius of the concave arc groove of the bearing shell is r2The fillet is α, and the radius of the circular arc boss of the fan-shaped lath-shaped bearing bush unit is r1The rounded corner is β, wherein r1＜r2,α＜β。
4. A tilting pad radial bearing according to claim 3, wherein: the angle theta between the center of the circular arc boss and the boundary of the tile1The ratio of the angle of wrap to the tile angle theta is 0.6-0.7.
5. A tilting pad radial bearing according to claim 1 or 2, wherein: the shaft sleeve comprises a cylindrical copper shell, the first permanent magnet inner core is of a circular ring structure, and the plurality of first permanent magnets are axially arranged in an annular cavity of the copper shell.
6. A tilting pad radial bearing according to claim 5, wherein: the annular first permanent magnet inner core is formed by splicing a plurality of radial magnetizing fan-shaped blocks.
7. A tilting pad radial bearing according to claim 1 or 2, wherein: each fan-shaped plate strip-shaped bearing bush unit comprises a bush surface layer and a fan-shaped second permanent magnet inner core, when the bush surface layer is made of rubber materials or babbit alloy, a fan-shaped plate strip-shaped bush base body is further arranged, the bush surface layer and the second permanent magnet inner core are vulcanized into a whole or directly electroplated and coated on the periphery of the permanent magnet inner core, the inner side of the bush base body is tightly connected with the bush surface layer, and an arc boss is arranged on the outer side of the bush base body and matched with an inner concave arc groove arranged on the bearing shell to form a tilting bush structure.
8. A tilting pad radial bearing according to claim 1 or 2, wherein: each fan-shaped plate strip-shaped bearing bush unit comprises a fan-shaped bearing bush surface layer and a fan-shaped second permanent magnet inner core, when the bearing bush surface layer is made of a sialon or phylon high polymer material, the fan-shaped second permanent magnet inner core is fixedly arranged in a fan-shaped stainless steel shell, the inner side of the stainless steel shell is bonded with the fan-shaped bearing bush surface layer, and an arc boss is arranged on the outer side of the stainless steel shell and matched with an inwards concave arc groove arranged on a bearing shell to form an inclinable bearing bush structure.
9. A tilting pad radial bearing according to claim 1 or 2, wherein: each fan-shaped plate strip-shaped bearing bush unit comprises a fan-shaped bearing bush surface layer and a fan-shaped second permanent magnet inner core, when the bearing bush surface layer is made of metal materials which are not magnetic-conductive, such as copper and stainless steel, the bearing bush surface layer supports a fan-shaped block shell structure, the second permanent magnet inner core is embedded into the bearing bush surface shell and sealed by a cover plate, and an arc boss is arranged on the outer side of the bearing bush surface layer and matched with an inner concave arc groove arranged on a bearing shell to form a tilting bush structure.
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| CN201910151812.9A CN109707736B (en) | 2019-02-28 | 2019-02-28 | Magnetic-hydraulic composite tilting pad radial bearing based on Halbach array |
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| CN201910151812.9A CN109707736B (en) | 2019-02-28 | 2019-02-28 | Magnetic-hydraulic composite tilting pad radial bearing based on Halbach array |
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| CN110242669B (en) * | 2019-06-20 | 2024-01-26 | 迈格钠磁动力股份有限公司 | Permanent magnet auxiliary support type water lubrication bearing and marine transportation equipment |
| CN110195741A (en) * | 2019-07-08 | 2019-09-03 | 恒力石化（大连）有限公司 | Off-gas expander tilting thrust bearing |
| CN110261803B (en) * | 2019-07-18 | 2024-04-02 | 宁波尼兰德磁业股份有限公司 | Halbach assembly |
| CN110993387B (en) * | 2019-11-26 | 2021-10-26 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Repulsion mechanism for ultra-fast circuit breaker |
| CN111853049B (en) * | 2020-06-15 | 2022-06-21 | 江苏大学 | Multi-angle adjustment and dead many connecting rods connecting device of lock |
| CN113323960B (en) * | 2021-05-08 | 2022-10-25 | 武汉理工大学 | Elastic support tilting pad magnetic liquid double-floating thrust bearing |
| CN114263678A (en) * | 2021-12-29 | 2022-04-01 | 北京金风科创风电设备有限公司 | Sliding bearing and wind generating set |
| CN114400125A (en) * | 2021-12-31 | 2022-04-26 | 昆山圆运升传动科技有限公司 | Solid column type magnet array and preparation method thereof |
| CN116753235B (en) * | 2023-08-22 | 2023-12-26 | 泉州海关综合技术服务中心 | Regulation and control device with tea garden pest behavior monitoring device |
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| JP3785096B2 (en) * | 2002-01-22 | 2006-06-14 | 三菱重工業株式会社 | Superconducting magnetic bearing |
| KR100792792B1 (en) * | 2006-10-26 | 2008-01-14 | 한국기계연구원 | Magnetic bearing with double damper |
| WO2011044428A2 (en) * | 2009-10-09 | 2011-04-14 | Dresser-Rand Company | Auxiliary bearing system for magnetically supported rotor system |
| CN108953377B (en) * | 2018-08-22 | 2019-11-08 | 合肥工业大学 | A kind of liquid magnetic composite bearing towards reusable rocket turbine pump |
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