WO2023226404A1 - Palier magnétique et compresseur - Google Patents

Palier magnétique et compresseur Download PDF

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Publication number
WO2023226404A1
WO2023226404A1 PCT/CN2022/140855 CN2022140855W WO2023226404A1 WO 2023226404 A1 WO2023226404 A1 WO 2023226404A1 CN 2022140855 W CN2022140855 W CN 2022140855W WO 2023226404 A1 WO2023226404 A1 WO 2023226404A1
Authority
WO
WIPO (PCT)
Prior art keywords
iron core
coil
stopper
magnetic
rotor
Prior art date
Application number
PCT/CN2022/140855
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English (en)
Chinese (zh)
Inventor
陈艳霞
张立泽
吴瑞
董如昊
刘湛钦
Original Assignee
珠海格力电器股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Publication of WO2023226404A1 publication Critical patent/WO2023226404A1/fr

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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
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0459—Details of the magnetic circuit
    • F16C32/0468—Details of the magnetic circuit of moving parts of the magnetic circuit, e.g. of the rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • 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
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic 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
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0444—Details of devices to control the actuation of the electromagnets

Definitions

  • the present disclosure relates to the field of bearing technology, and specifically to a magnetic suspension bearing and a compressor.
  • Magnetic bearings use the electromagnetic force on the rotor to levitate the rotating shaft.
  • the rotating shaft and the stator maintain a non-contact state, so they have the advantages of no wear, high speed, high precision, and long life.
  • three-degree-of-freedom magnetic levitation bearings combine radial bearings and axial bearings, use permanent magnets to generate bias magnetic fields, and simultaneously realize movement of the rotating shaft in three degrees of freedom, radial and axial. It can effectively reduce the bearing volume, mass and rotor length, and increase the critical speed of the rotor.
  • the related technology of three-degree-of-freedom magnetic levitation bearing uses a symmetrical structure to distribute two axial coils on both sides of the bearing.
  • the axial coil takes up a large space. Both axial coils are plugged into the iron core.
  • the stability of the axial coil is poor.
  • the cost of designing two axial coils is higher.
  • the present disclosure provides a magnetic levitation bearing and a compressor, which can overcome the defects in the related art that two axial coils are required, the cost is high, and the axial coils occupy a large space.
  • a magnetic suspension bearing including: an outer iron core, a first iron core is set inside the outer iron core, and a permanent magnet is provided between the first iron core and the outer iron core.
  • Magnet a bearing rotor is set inside the first iron core, a first coil is provided on only one side in the axial direction of the first iron core, the first coil can generate a magnetic field when energized, and the first coil is connected with the magnet.
  • the cooperation of the permanent magnets can produce axial magnetic force on the bearing rotor, so that the bearing rotor is axially suspended.
  • a second coil is wound on the first iron core, and the second coil can generate a magnetic field when energized. The second coil cooperates with the permanent magnet to generate a radial magnetic force on the bearing rotor, so that the bearing rotor is suspended in a radial direction.
  • it also includes a skeleton, the skeleton is fixed on the first iron core through a first locking piece, and the first coil is wound around the skeleton.
  • one side of the frame is fixed on the first iron core through the first locking piece.
  • a mounting ring is further included.
  • the mounting ring is sleeved in the outer iron core.
  • a fourth iron core is sleeved in the mounting ring.
  • the first iron core is sleeved in the third iron core.
  • a gap is provided between the fourth iron core and the outer iron core, and the permanent magnet is arranged in the gap.
  • the mounting ring is located on the other axial side of the first iron core, and the first coil is located between the fourth iron core and the axially inner side of the outer iron core.
  • the permanent magnets are segmented permanent magnets, and the permanent magnets are evenly distributed between the first iron core and the outer iron core along the circumferential direction of the outer iron core.
  • a fixed frame is provided between the first iron core and the outer iron core, and the fixed frame can limit the displacement of the permanent magnet.
  • the radially outer wall of the first iron core is the first wall
  • the radially inner wall of the first iron core is the second wall
  • the first coil is located in the first iron core. on the first iron core near the first wall
  • the second coil is located on the first iron core close to the second wall.
  • the first iron core is annular, has at least 4 radial magnetic poles on the first iron core, and the second coil is wound around the radial magnetic poles.
  • Two coils are evenly distributed on the first iron core, and every two second coils are divided into one group.
  • the two second coils in each group are arranged oppositely, and the two second coils in each group are arranged oppositely.
  • the coils are connected in series.
  • the outer iron core includes a second iron core and a third iron core, both of the second iron core and the third iron core are annular, and the second iron core and the third iron core are ring-shaped.
  • the longitudinal sections of the three iron cores are all C-shaped, the free end of the second iron core located radially outside is formed as a first surface, and the free end located radially outside of the third iron core is formed as a second surface , the first surface is opposite to and connected with the second surface.
  • the magnetic suspension bearing can cooperate with the first rotor of the motor, and is characterized in that: the bearing rotor includes a first stopper, a fifth iron core and a second stopper, and the first stopper , the fifth iron core and the second blocker are both sleeved on the first rotor, and the fifth iron core is located between the first blocker and the second blocker, and the first blocker Cooperating with the second stopper, the fifth iron core can be limited.
  • a protective member is further included, and the protective member is sleeved on the rotor, and the first baffle, the fifth iron core, and the second baffle are all sleeved on the protective member.
  • a magnetic isolation member is provided between the first stopper and the fifth iron core, and between the second stopper and the fifth iron core.
  • the present disclosure also provides a compressor, including the above-mentioned magnetic suspension bearing.
  • the present disclosure provides a magnetic levitation bearing and compressor.
  • the first coil is provided on only one side of the first iron core in the axial direction to provide an axial magnetic circuit, which reduces the coil manufacturing process.
  • the process is simple and saves the cost of the outer iron core. Internal space, easy installation, stable assembly, reducing the processing cost of magnetic bearings.
  • Figure 1 is a cross-sectional view of a magnetic suspension bearing according to an embodiment of the present disclosure
  • Figure 2 is a front view of the magnetic suspension bearing according to the embodiment of the present disclosure.
  • Figure 3 is a schematic structural diagram of a fixed frame in a magnetic suspension bearing according to an embodiment of the present disclosure
  • Figure 4 is a first structural schematic diagram of the bearing rotor in the magnetic suspension bearing according to the embodiment of the present disclosure
  • Figure 5 is a second structural schematic diagram of the bearing rotor in the magnetic suspension bearing according to the embodiment of the present disclosure
  • Figure 6 is a third structural schematic diagram of the bearing rotor in the magnetic suspension bearing according to the embodiment of the present disclosure.
  • Figure 7 is a fourth structural schematic diagram of the bearing rotor in the magnetic suspension bearing according to the embodiment of the present disclosure.
  • Figure 8 is a fifth structural schematic diagram of the bearing rotor in the magnetic suspension bearing according to the embodiment of the present disclosure.
  • Figure 9 is a sixth structural schematic diagram of the bearing rotor in the magnetic suspension bearing according to the embodiment of the present disclosure.
  • Figure 10 is a seventh structural schematic diagram of the bearing rotor in the magnetic suspension bearing according to the embodiment of the present disclosure.
  • a magnetic suspension bearing including: an outer iron core, and a first iron core 11 is set inside the outer iron core.
  • a permanent magnet 4 is provided between 11 and the outer core.
  • a bearing rotor 23 is set inside the first core 11.
  • a first coil 2 is provided on only one side of the first core 11 in the axial direction. The first coil 2 can generate a magnetic field when energized, and the first coil 2 can cooperate with the permanent magnet 4 to generate an axial magnetic force on the bearing rotor 23 to make the bearing rotor 23 axially suspended.
  • a second coil 7 is wound around the first iron core 11. The second coil 7 can generate a magnetic field when energized.
  • the second coil 7 can cooperate with the permanent magnet 4 to generate a radial magnetic force on the bearing rotor 23. So that the bearing rotor 23 is radially suspended.
  • the first iron core 11 is preferably a silicon steel sheet.
  • the two-sided axial coils in the related technology are replaced with one-sided axial coils, and the number of coil turns is increased, so that the first coil 2 is connected with the permanent magnet. 4.
  • the cooperation can produce axial magnetic force on the bearing rotor 23, so that the bearing rotor 23 is axially suspended, ensuring the space in the outer iron core, the structure is simpler, and the implementation method is easier, making the overall structure of the bearing More compact, it can significantly reduce the bearing size in the axial and radial directions and reduce production costs.
  • the axial magnetic circuit 13 generated by the first axial coil 2 is used to control the axial movement of the bearing rotor.
  • the first coil 2 is supplied with a positive current, and the axial magnetic circuit 13 passes through the third iron core 1, the second iron core 6,
  • the bearing rotor 23 is closed, and the permanent magnet bias magnetic circuit 14 generated by the permanent magnet 4 is divided into two paths: the left end and the right end.
  • the left end magnetic path passes through the fourth iron core 9, the first iron core 11, the fifth iron core 18, and the first gear. Part 17.
  • the third iron core 1 and the permanent magnet 4 are closed.
  • the direction of the magnetic circuit at the left end of the bearing rotor 23 is the same. The magnetic fields are superimposed and the output force at the left end increases.
  • the right end magnetic circuit passes through the fourth iron core 9, the first iron core 11 and the fifth iron.
  • the core 18, the second stopper 19, the second iron core 6, and the permanent magnet 4 are closed.
  • the direction of the magnetic circuit at the right end of the bearing rotor 23 is opposite.
  • the magnetic field weakens and the output force at the right end decreases.
  • the bearing rotor 23 receives a large force to the left, causing the first Rotor 12 moves to the left.
  • a negative current flows through the first coil 2
  • the magnetic field at the right end of the bearing rotor 23 is enhanced, and the bearing rotor 23 receives a large force to the right, causing the first rotor 12 to move to the right, thereby controlling the first rotor 12 by controlling the magnitude and sign of the current. Movement of the rotor 12 in the axial direction.
  • the second coil 7 generates a radial first radial magnetic circuit 15. Positive current flows through the coil, and the first radial magnetic circuit 15 is closed. As shown in Figure 2, the upper right circuit is closed clockwise, the lower left circuit is closed counterclockwise, and the permanent magnet The direction of the bias magnetic circuit generated by 4 points to the center of the circle, the magnetic field of the upper left magnetic pole is weakened, and the magnetic field of the lower right magnetic pole is strengthened.
  • the bearing rotor 23 receives a large force to the right and downward; the second coil 7 generates the second radial magnetic circuit 16, and the coil passes into the positive direction. current, the second radial magnetic circuit 16 is closed.
  • the magnetic field of the upper right magnetic pole is weakened and the magnetic field of the lower left magnetic pole is strengthened.
  • the bearing rotor 23 receives a large force to the left and downward, and vice versa.
  • the magnitude and positive and negative are used to control the movement of the bearing rotor 23 in the radial direction.
  • the radially outer wall surface of the first iron core 11 is the first wall surface
  • the radially inner wall surface of the first iron core 11 is the second wall surface
  • the first coil 2 is located there.
  • the first iron core 11 is located close to the first wall
  • the second coil 7 is located on the first iron core 11 close to the second wall.
  • the first coil 2 is located on the first iron core 11 close to the first wall
  • the second coil 7 is located on the first iron core 11 close to the second wall, which can form a more
  • the balanced magnetic circuit effectively improves the magnetic circuit stability of the magnetic suspension bearing and improves the working performance of the magnetic suspension bearing.
  • the frame 10 is U-shaped, and the opening of the frame 10 faces the outer iron core.
  • One side of the frame 10 is fixed on the first iron core 11 through the first locking member 8 .
  • the first locking member 8 is preferably a screw, and the skeleton 10 is assembled on the first iron core 11 using locking screws.
  • the assembly is stable.
  • a control magnetic field can be provided to control the bearing rotor 23.
  • the opening of the frame 10 faces the outer iron core.
  • the opening of the frame 10 faces the outer iron core and facilitates the assembly of the frame 10.
  • the mounting ring 5 also includes a mounting ring 5.
  • the mounting ring 5 is sleeved in the outer iron core.
  • the mounting ring 5 is sleeved with a fourth iron core 9.
  • the first iron core 11 is set in the fourth iron core 9, a gap is provided between the fourth iron core 9 and the outer iron core, and the permanent magnet 4 is arranged in the gap.
  • the mounting ring 5 is located on the other axial side of the first iron core 11 , and the first coil 2 is located between the fourth iron core 9 and the axial inner side of the outer iron core.
  • the fourth iron core 9 is used to facilitate the installation of the first iron core 11 .
  • the mounting ring 5 reduces the difficulty of assembling the first iron core 11 and the fourth iron core 9.
  • the mounting ring 5 is located on the other axial side of the first iron core 11 to avoid the compact position of the mounting ring 5 and the frame 10, which may affect Skeleton 10 installed.
  • the purpose of the installation ring 5 is to facilitate the interference assembly of the first iron core 11 and to leave a gap between the fourth iron core 9 and the outer iron core to assemble the permanent magnet 4 .
  • the first coil 2 is wound around the axial frame 10, and the axial frame 10 is locked on the first iron core 11 through the first locking member 8 to fix the first coil 2 and prevent the axial coil from loosening. Take off.
  • the permanent magnets 4 are segmented permanent magnets. Along the circumferential direction of the outer iron core, the permanent magnets 4 are evenly distributed between the first iron core 11 and the outer iron core. between cores. Specifically, as shown in FIG. 3 , a fixing bracket 3 is provided between the first iron core 11 and the outer iron core. The fixing bracket 3 can limit the displacement of the permanent magnet 4 .
  • the 4N pole of the permanent magnet faces the center of the circle, so that the bias magnetic circuit points to the center of the circle.
  • the segmented permanent magnets are easy to process, simple to magnetize, and easy to install. They also provide bias magnetic circuits for both radial and axial directions, reducing the need for permanent magnets. The number of magnets is reduced, the cost is reduced, and the permanent magnets 4 are prevented from loosening through the fixing bracket 3.
  • the first iron core 11 is annular, has at least 4 radial magnetic poles on the first iron core 11, and the second coil 7 is wound around the radial magnetic poles,
  • the four second coils 7 are evenly distributed on the first iron core 11, and every two second coils 7 are divided into a group, and the two second coils 7 of each group are arranged opposite each other, and, The two second coils 7 of each group are connected in series.
  • the first iron core 11 uses four magnetic poles, and four coils are wound on it to provide a radial magnetic field to ensure radial magnetic force, and realize movement control of the bearing rotor 23 in the radial direction.
  • the outer iron core includes a second iron core 6 and a third iron core 1. Both the second iron core 6 and the third iron core 1 are annular. The second iron core 6 and the third iron core 1 are ring-shaped. The longitudinal sections of the iron core 1 are all C-shaped, the free end of the second iron core 6 located on the radially outer side is formed as a first surface, and the free end of the third iron core 1 located on the radially outer side is formed as a third surface. Two sides, the first side is opposite to and connected with the second side.
  • the outer iron core is annular, and the bearing rotor 23 is located between the C-shaped openings of the outer iron core. This makes it easier to place components in the outer iron core 2 and is more conducive to forming a complete magnetic circuit. , better magnetic performance.
  • the magnetic suspension bearing can cooperate with the first rotor 12 of the motor.
  • the bearing rotor 23 includes a first block 17, a fifth iron core 18 and a second block. 19, the first blocking member 17, the fifth iron core 18 and the second blocking member 19 are all sleeved on the first rotor 12, and the fifth iron core 18 is located on the first blocking member 17 and the second stopper 19 , the first stopper 17 and the second stopper 19 cooperate to limit the fifth iron core 18 .
  • the first stopper 17 , the fifth iron core 18 , and the second stopper 19 all have an interference fit with the first rotor 12 .
  • a protective member 20 is also included.
  • the protective member 20 is sleeved on the first rotor 12 .
  • the first stopper 17 , the fifth iron core 18 and The second blocking members 19 are sleeved on the protective member 20 .
  • the second iron core 6 and the third iron core 1 are aligned with the first stopper 17 and the second stopper 19, and the axial control magnetic circuit passes from the second iron core 6, the second stopper 19, the fifth The iron core 18, the first stopper 17 to the third iron core 1, the permanent magnet bias magnetic circuit is: from the fifth iron core 18, the second stopper 19 to the second iron core 6, and, from the fifth iron core 18.
  • a magnetic isolation member 21 is provided between the first stopper 17 and the fifth iron core 18 and between the second stopper 19 and the fifth iron core 18.
  • the second The iron core 6 and the third iron core 1 are aligned with the first stopper 17 and the second stopper 19, and the axial control magnetic circuit is from the second iron core 6, the second stopper 19, the guard 20, and the first stopper 17 to The third iron core 1,
  • the permanent magnet bias magnetic circuit is: from the fifth iron core 18, the protective member 20, the first stopper 17 to the third iron core 1, and, from the fifth iron core 18, the protective member 20,
  • the second stopper 19 reaches the second iron core 6 .
  • the first stopper 17 and the second stopper 19 are L-shaped.
  • the first stopper 17, the second stopper 19 and the fifth iron core 18 constitute the bearing rotor 23, which all adopt interference fit. ;
  • the first stopper 17 is L-shaped, and the first stopper 17, the second stopper 19 and the fifth iron core 18 constitute the bearing rotor 23, all of which adopt interference fit;
  • the present disclosure also provides a compressor, including the above-mentioned magnetic suspension bearing.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

La présente divulgation concerne un palier magnétique et un compresseur. Le palier magnétique comprend un noyau de fer externe ; un premier noyau de fer est emmanché dans le noyau de fer externe ; un aimant permanent est disposé entre le premier noyau de fer et le noyau de fer externe ; un rotor de palier est emmanché dans le premier noyau de fer ; une première bobine est disposée sur un seul côté du premier noyau de fer dans la direction axiale ; la première bobine peut générer un champ magnétique lorsqu'elle est excitée ; la première bobine peut fonctionner conjointement avec l'aimant permanent pour générer une force magnétique axiale appliquée au rotor de palier, de sorte que le rotor de palier soit suspendu axialement ; une seconde bobine est enroulée sur le premier noyau de fer ; la seconde bobine peut générer un champ magnétique lorsqu'elle est excitée ; et la seconde bobine peut fonctionner conjointement avec l'aimant permanent pour générer une force magnétique radiale appliquée au rotor de palier, de sorte que le rotor de palier soit suspendu radialement. La présente divulgation permet de surmonter les défauts de la technique associée selon lesquels deux bobines axiales sont nécessaires, le coût est élevé, et les bobines axiales sont encombrantes.
PCT/CN2022/140855 2022-05-26 2022-12-22 Palier magnétique et compresseur WO2023226404A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210582906.3 2022-05-26
CN202210582906.3A CN115013435A (zh) 2022-05-26 2022-05-26 一种磁悬浮轴承、压缩机

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WO2023226404A1 true WO2023226404A1 (fr) 2023-11-30

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WO (1) WO2023226404A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115013435A (zh) * 2022-05-26 2022-09-06 珠海格力电器股份有限公司 一种磁悬浮轴承、压缩机

Citations (10)

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Publication number Priority date Publication date Assignee Title
JPH07208470A (ja) * 1994-01-21 1995-08-11 Yaskawa Electric Corp 磁気軸受を用いた同期回転電機とその制御装置及び方法
JP2003339136A (ja) * 2002-05-20 2003-11-28 Kumamoto Technology & Industry Foundation 環状モータ
CN108087321A (zh) * 2017-12-21 2018-05-29 珠海格力节能环保制冷技术研究中心有限公司 一种磁悬浮轴承、磁悬浮转子支承组件和压缩机
CN108591259A (zh) * 2018-06-07 2018-09-28 珠海格力电器股份有限公司 磁悬浮轴承
CN108644230A (zh) * 2018-06-27 2018-10-12 珠海格力电器股份有限公司 混合式轴向轴承
CN110469584A (zh) * 2019-09-09 2019-11-19 珠海格力电器股份有限公司 磁悬浮轴承转子结构、磁悬浮轴承、压缩机和空调器
CN110848253A (zh) * 2019-11-11 2020-02-28 北京航空航天大学 一种三自由度径向-轴向一体化混合磁轴承
CN112727924A (zh) * 2021-01-25 2021-04-30 珠海格力电器股份有限公司 磁悬浮轴承、磁悬浮电机、压缩机
CN115013435A (zh) * 2022-05-26 2022-09-06 珠海格力电器股份有限公司 一种磁悬浮轴承、压缩机
CN217440578U (zh) * 2022-05-26 2022-09-16 珠海格力电器股份有限公司 一种磁悬浮轴承、压缩机

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07208470A (ja) * 1994-01-21 1995-08-11 Yaskawa Electric Corp 磁気軸受を用いた同期回転電機とその制御装置及び方法
JP2003339136A (ja) * 2002-05-20 2003-11-28 Kumamoto Technology & Industry Foundation 環状モータ
CN108087321A (zh) * 2017-12-21 2018-05-29 珠海格力节能环保制冷技术研究中心有限公司 一种磁悬浮轴承、磁悬浮转子支承组件和压缩机
CN108591259A (zh) * 2018-06-07 2018-09-28 珠海格力电器股份有限公司 磁悬浮轴承
CN108644230A (zh) * 2018-06-27 2018-10-12 珠海格力电器股份有限公司 混合式轴向轴承
CN110469584A (zh) * 2019-09-09 2019-11-19 珠海格力电器股份有限公司 磁悬浮轴承转子结构、磁悬浮轴承、压缩机和空调器
CN110848253A (zh) * 2019-11-11 2020-02-28 北京航空航天大学 一种三自由度径向-轴向一体化混合磁轴承
CN112727924A (zh) * 2021-01-25 2021-04-30 珠海格力电器股份有限公司 磁悬浮轴承、磁悬浮电机、压缩机
CN115013435A (zh) * 2022-05-26 2022-09-06 珠海格力电器股份有限公司 一种磁悬浮轴承、压缩机
CN217440578U (zh) * 2022-05-26 2022-09-16 珠海格力电器股份有限公司 一种磁悬浮轴承、压缩机

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