CN115654016B - Magnetic suspension active bearing, motor and compressor - Google Patents
Magnetic suspension active bearing, motor and compressor Download PDFInfo
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- CN115654016B CN115654016B CN202211259974.2A CN202211259974A CN115654016B CN 115654016 B CN115654016 B CN 115654016B CN 202211259974 A CN202211259974 A CN 202211259974A CN 115654016 B CN115654016 B CN 115654016B
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- 239000000725 suspension Substances 0.000 title claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims 2
- 230000010354 integration Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 8
- 238000004804 winding Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005339 levitation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Abstract
The invention provides a magnetic suspension active bearing, a motor and a compressor, wherein the magnetic suspension active bearing comprises: the device comprises a first axial stator, a second axial stator, a radial stator, a bearing rotor and a rotating shaft, wherein the rotating shaft is sleeved in the bearing rotor; the radial stator comprises a stator yoke, 12 pole posts are arranged on the stator yoke along the radial direction of the bearing rotor, the 12 pole posts are divided into 4 groups of pole posts, the 4 groups of pole posts are symmetrically distributed on the stator yoke, the polarities of the magnetic poles of two adjacent pole posts in each group of pole posts are opposite, and the 12 pole posts are provided with radial coils, so that the defect that the integration degree of the radial bearing and the axial bearing is not high in the prior art can be overcome, the thrust disc is not required to be independently assembled on a rotating shaft, the structure is more compact, and the process is simpler.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a magnetic suspension active bearing, a motor and a compressor.
Background
The magnetic suspension bearing utilizes electromagnetic force to the rotor to suspend the rotating shaft, and the rotating shaft and the stator keep a non-contact state, so that the magnetic suspension bearing has the advantages of no abrasion, high rotating speed, high precision, long service life and the like. Magnetic bearings can be divided into three classes according to the working principle: active magnetic bearings, passive magnetic bearings, and hybrid magnetic bearings.
The magnetic suspension bearing comprises a radial bearing and an axial bearing, wherein the axial bearing can generate axial magnetic force for the bearing rotor to axially suspend the rotor, and the radial bearing can generate radial magnetic force for the bearing rotor to radially suspend the rotor.
Disclosure of Invention
Therefore, the invention provides the magnetic suspension active bearing, the motor and the compressor, which can overcome the defect of low integration degree of the radial bearing and the axial bearing in the prior art, so that a thrust disc is not required to be assembled on a rotating shaft independently, the structure is more compact, and the process is simpler.
In order to solve the above problems, the present invention provides a magnetic suspension active bearing, comprising:
The bearing rotor is sleeved on the periphery of the rotating shaft, the first axial stator and the second axial stator are positioned on the periphery of the rotating shaft, the first axial stator is positioned at one end of the bearing rotor along the axial direction of the bearing rotor, the second axial stator is positioned at the other end of the bearing rotor, and the radial stator is positioned on the periphery of the bearing rotor;
The radial stator comprises a stator yoke, 12 polar posts are arranged on the stator yoke along the radial direction of the bearing rotor, the 12 polar posts face the bearing rotor, on the radial section of the bearing rotor, the 12 polar posts are divided into 4 groups of polar posts, the 4 groups of polar posts are symmetrically distributed on the stator yoke, the magnetic poles of two adjacent polar posts in each group of polar posts are opposite in polarity, the 12 polar posts are provided with radial coils, and the radial coils can generate radial magnetic force on the bearing rotor to enable the bearing rotor to radially suspend;
The first axial stator comprises a plurality of first outer pole blocks and first inner pole blocks, the plurality of first outer pole blocks are arranged at intervals along the circumferential direction of the first axial stator, and an axial coil is arranged between the first outer pole blocks and the first inner pole blocks; the second axial stator comprises a plurality of second outer pole blocks and second inner pole blocks, an axial coil is arranged between the second outer pole blocks and the second inner pole blocks, the second outer pole blocks are arranged at intervals along the circumferential direction of the first axial stator, the axial coil can generate axial magnetic force on the bearing rotor through passing energy so as to enable the bearing rotor to axially suspend, and the first outer pole blocks and the second outer pole blocks are respectively in one-to-one correspondence with pole columns with the same polarity in 12 pole columns on the stator magnet yoke.
In some embodiments, each set of poles includes a first pole, a second pole, and a third pole, the second pole being located between the first pole and the third pole, and the first pole being symmetrical with the third pole, the first pole being opposite in polarity to the second pole, and the third pole.
In some embodiments, the first pole is the same width as the third pole, and the second pole has a width greater than the width of the third pole.
In some embodiments, the number of the first outer pole blocks is at least 4, and two adjacent first pole posts and two adjacent third pole posts respectively correspond to one first outer pole block; the number of the second external pole blocks is at least 4, and two adjacent first pole columns and two adjacent third pole columns respectively correspond to one second external pole block.
In some embodiments, the number of the first outer pole blocks is at least 4, and the second pole corresponds to one first outer pole block;
the number of the second external pole blocks is at least 4, and the second pole corresponds to one second external pole block.
In some embodiments, an axially inner working gap is provided between the first inner pole piece and an end face of the bearing rotor, an axially outer working gap is provided between the first outer pole piece and the radial stator circumferential wall, and the first outer pole piece is located radially inward of the radial coil.
In some embodiments, an axial magnetic circuit is formed among the first axial stator, the bearing rotor and the radial stator, and the axial magnetic circuit passes through the first outer pole block, the axial outer working gap, the pole post, the bearing rotor, the axial inner working gap and the first inner pole block and returns to the first axial stator to be closed.
In some embodiments, an axially inner working gap is provided between the second inner pole piece and an end face of the bearing rotor, an axially outer working gap is provided between the second outer pole piece and the radial stator circumferential wall, and the second outer pole piece is located radially inward of the radial coil.
In some embodiments, an axial magnetic circuit is formed between the second axial stator, the bearing rotor, and the radial stator, the axial magnetic circuit passing through the second outer pole piece-the axially outer working gap-the pole post-the bearing rotor-the axially inner working gap-the second inner pole piece back to the second axial stator.
The invention also provides a motor, which comprises the magnetic suspension active bearing.
The invention also provides a compressor comprising the motor.
According to the magnetic suspension active bearing, the motor and the compressor provided by the invention, the radial stator magnetic circuit, the first axial stator magnetic circuit and the second axial stator magnetic circuit are conducted through the bearing rotor, a thrust disc is not required to be designed on the rotating shaft, the integration degree of the bearing is further improved, the integral structure and the processing and manufacturing process of the bearing are simplified, the assembly is convenient, the integration degree is higher, the structure is more compact, the volume of the bearing is effectively reduced, the length of the rotating shaft is shortened, the critical rotating speed of the rotor is improved, and the running stability of a magnetic suspension system is improved; 4 groups of polar posts are NSN or SNS distributed, the magnetic poles of two adjacent polar posts in each group of polar posts are opposite in polarity, electromagnetic force generated by the two adjacent polar posts is always located in the middle of each polar post, the radial position of a rotating shaft can be guaranteed, a plurality of first outer polar blocks are arranged at intervals, the first outer polar blocks are opposite to 12 polar posts, and the magnetic leakage phenomenon of a radial magnetic circuit on the adjacent radial polar posts on an axial stator outer circle is avoided.
Drawings
FIG. 1 is a cross-sectional view of a magnetically levitated active bearing according to an embodiment of the invention;
FIG. 2 is a front view of a magnetically levitated active bearing according to an embodiment of the invention;
FIG. 3 is a top view of a magnetic levitation active bearing axial stator according to an embodiment of the present invention;
FIG. 4 is a front view of a radial stator in a magnetically levitated active bearing according to an embodiment of the invention;
fig. 5 is a front view of a radial stator in a magnetically levitated active bearing according to another embodiment of the invention.
The reference numerals are expressed as:
1. a first axial stator; 2. a second axial stator; 3. an axial coil; 4. a first pole; 5. a radial coil; 6. a radial stator; 7. a bearing rotor; 8. a rotating shaft; 9. a first outer pole piece; 10. a second outer pole block; 11. a second post; 12. a third pole; 13. a first inner pole piece; 14. a second inner pole piece; 15. radial working gap; 16. an axially inner working gap; 17. a stator yoke; 001. an axial magnetic circuit; 002. a radial magnetic circuit.
Detailed Description
Referring to fig. 1 to 4 in combination, there is provided a magnetic levitation active bearing comprising: the bearing rotor 7 is sleeved on the periphery of the rotating shaft 8, the first axial stator 1 and the second axial stator 2 are positioned on the periphery of the rotating shaft 8, the first axial stator 1 is positioned at one end of the bearing rotor 7 along the axial direction of the bearing rotor 7, the second axial stator 2 is positioned at the other end of the bearing rotor 7, and the radial stator 6 is positioned on the periphery of the bearing rotor 7; the radial stator 6 comprises a stator yoke 17, 12 poles are arranged on the stator yoke 17 along the radial direction of the bearing rotor 7, the 12 poles face the bearing rotor 7, the 12 poles are divided into 4 groups of poles on the radial section of the bearing rotor 7, the 4 groups of poles are symmetrically distributed on the stator yoke 17, the magnetic poles of two adjacent poles in each group of poles are opposite in polarity, the 12 poles are provided with radial coils 5, and the radial coils 5 can generate radial magnetic force on the bearing rotor 7 by energizing so as to radially suspend the bearing rotor 7; The first axial stator 1 comprises a plurality of first outer pole blocks 9 and first inner pole blocks 13, the plurality of first outer pole blocks 9 are arranged at intervals along the circumferential direction of the first axial stator 1, and an axial coil 3 is arranged between the first outer pole blocks 9 and the first inner pole blocks 13; the second axial stator 2 comprises a plurality of second outer pole blocks 10 and second inner pole blocks 14, an axial coil 3 is arranged between the second outer pole blocks 10 and the second inner pole blocks 14, the plurality of second outer pole blocks 10 are arranged at intervals along the circumferential direction of the first axial stator 1, and the axial coil 3 can generate axial magnetic force on the bearing rotor 7 through energizing so as to axially suspend the bearing rotor 7. the first outer pole blocks and the second outer pole blocks are respectively arranged in a one-to-one correspondence to poles with the same polarity as the poles on the 12 poles on the stator yoke 17. In the technical scheme, the magnetic circuits of the radial stator 6, the magnetic circuits of the first axial stator 1 and the magnetic circuits of the second axial stator 2 are conducted through the bearing rotor 7, a thrust disc is not required to be designed on the rotating shaft 8, the integration degree of the bearing is further improved, the integral structure and the processing and manufacturing process of the bearing are simplified, the assembly is convenient, the integration degree is higher, the structure is more compact, the volume of the bearing is effectively reduced, the length of the rotating shaft is shortened, the critical rotating speed of the rotor is improved, and the running stability of a magnetic suspension system is improved; the 4 sets of polar posts are E-shaped structures and are distributed in NSN or SNS, the polarities of the magnetic poles of two adjacent polar posts in each set of polar posts are opposite, electromagnetic force generated by the two adjacent polar posts is always located in the middle of each polar post, the position of the rotating shaft 8 in the radial direction can be ensured, a plurality of first outer polar blocks 9 are arranged at intervals, the first outer polar blocks 9 are opposite to 12 polar posts, and the magnetic leakage phenomenon of a radial magnetic circuit on each adjacent radial polar post on the outer circle of the axial stator is avoided. Referring to fig. 2, the radial coils 5 of any group of poles, wherein one of the protruding ends of the middle pole is S-pole, the protruding end of one pole is N-pole, the other pole is N-pole, the radial magnetic circuit 002 in one pole and the adjacent middle pole has the same flow direction as the axial magnetic circuit 001, so that the magnetic flux between the two poles and the bearing rotor 7 is increased, the radial force is increased, but the effect of the axial magnetic flux on the radial magnetic flux in one quadrant is only increased, and the enhancement of the axial magnetic flux on the radial magnetic flux in the four quadrants are mutually offset, namely, the radial magnetic circuit and the axial magnetic circuit of the integrated magnetic bearing flow through the bearing rotor 7, However, even if the axial magnetic circuit changes, the axial magnetic circuit and the radial magnetic circuit cannot be influenced on the whole radial magnetic circuit, so that the axial magnetic circuit and the radial magnetic circuit respectively play respective roles, and the control of the magnetic bearing is simplified. The invention integrates the radial bearing and the axial bearing, has no thrust disc, compact structure, reduced bearing size, shortened rotor length, improved critical rotation speed of the rotor, and improved stability and applicability of the magnetic suspension system. Compared with the magnetic poles on the axial direction which are positioned beside the magnetic yoke of the radial stator, the magnetic leakage of the radial magnetic circuit in the axial direction is reduced, the situation of non-uniform axial force and circumferential direction is avoided, 12 pole columns are adopted, the processing and manufacturing process is simple, the radial magnetic circuit is convenient to control, no permanent magnet exists, the cost is low, the assembly is convenient, the bearing capacity is large, the high-power operation can be realized, a plurality of second outer pole blocks 10 are arranged at intervals along the circumferential direction of the first axial stator 1, a plurality of first outer pole blocks 9 are arranged at intervals along the circumferential direction of the first axial stator 1, the magnetic poles on the axial stator adopt a block structure, the magnetic leakage phenomenon of the radial magnetic circuit on the adjacent radial pole columns on the outer circle of the axial stator is avoided, only the air gap magnetic field on the radial magnetic poles is enhanced, The radial and axial integration is high, a thrust disk is not provided, the cost is reduced, the structure is compact, the process is simple, the critical rotation speed is high, and the performance is stable. The axial coil 3 adopts a single coil mode, is arranged in the first axial stator 1 and the second axial stator 2, is positioned at two ends of a pole post of the radial stator 6, provides an axial magnetic circuit, controls the axial movement of the bearing rotor 7, adopts 12 stages of radial magnetic poles, is of four E-shaped structures which are symmetrically distributed, two ends of the radial magnetic poles are small teeth, the middle magnetic pole is large teeth, the axial magnetic circuit provided in the radial direction enhances a radial air gap magnetic field, the axial magnetic flux influences the radial magnetic flux positively, controls the movement of the radial direction of the rotating shaft, simultaneously realizes the movement in three degrees of freedom in the radial and the axial direction of the rotating shaft, effectively reduces the volume of the bearing and the length of the rotor, and improves the running stability of the rotor.
In some embodiments, each group of poles includes a first pole 4, a second pole 11 and a third pole 12, the second pole 11 is located between the first pole 4 and the third pole 12, and the first pole 4 is symmetrical to the third pole 12, and the polarities of the poles of the first pole 4, the second pole 11 and the third pole 12 are opposite. In this technical scheme, make produce first utmost point post 4-second utmost point post 11, third utmost point post 12-second utmost point post 11 two kinds of magnetic circuits have guaranteed radial magnetic force's intensity. The first pole 4 and the third pole 12 at two ends are small teeth, the second pole 11 in the middle is a big tooth, radial windings on the small teeth at two ends are connected in series, each E-shaped structure magnetic pole is distributed in NSN (or SNS) in space, as shown in figure 2, a radial magnetic circuit 002 returns to the first pole 4 to be closed through a first pole 4-radial working gap 15-bearing rotor 7-radial working gap 15-second pole 11-stator yoke 17 on the E-shaped structure; the second radial magnetic circuit returns to the third pole 12 to be closed through the third pole 12, the radial working gap 15, the bearing rotor 7, the radial working gap 15, the second pole 11 and the stator yoke 17; referring to fig. 3, the magnetic pole on the axial stator adopts a block structure, a single coil is wound in an inner groove, and when the magnetic pole is assembled, the axial magnetic circuit 001 points to the circle center (or points to the circumference) completely corresponding to the small tooth structure of the radial stator, so that the air gap magnetic field of small teeth at two ends of the E-shaped structure is enhanced. When the bearing rotor 7 is required to be controlled to move to the upper left, the upper left radial winding is electrified to provide radial force for the bearing rotor to the upper left; when the bearing rotor is required to be controlled to move upwards, the left radial winding and the right radial winding are electrified to provide radial force for the bearing rotor upwards, and the control of the radial direction movement direction is wide and flexible. The three-degree-of-freedom magnetic bearing structure integrates the radial bearing and the axial bearing, has no thrust disc, compact structure and simple process, effectively reduces the volume of the bearing, shortens the length of the rotor, improves the critical rotating speed of the rotor and improves the running stability of the system.
In some embodiments, the first pole 4 is the same width as the third pole 12, and the second pole 11 has a width greater than the third pole 12. In this technical solution, the second pole 11 is used as a flux of the magnetic force between the first pole 4 and the third pole 12, and the width of the second pole 11 is greater than the width of the third pole 12, so that the magnetic circuits on both sides are optimized.
Referring to fig. 3, in some embodiments, the number of the first outer pole blocks 9 is at least 4, and two adjacent first pole posts 4 and two adjacent third pole posts 12 respectively correspond to one first outer pole block 9; at least 4 second external pole blocks 10 are provided, and two adjacent first pole columns 4 and two adjacent third pole columns 12 respectively correspond to one second external pole block 10. In the technical scheme, the magnetic leakage phenomenon of the radial magnetic circuit on the adjacent radial polar column on the outer circle of the axial stator is avoided, and only the air gap magnetic field on the radial polar column is enhanced. The first outer pole pieces 9 are arranged at intervals so as not to be close to the radial magnetic poles, the axial magnetic circuit cannot pass through the radial magnetic poles (the second pole 11 and the third pole 12) at the positions, so that the radial magnetic circuit in the opposite direction cannot be influenced, only the radial magnetic poles (the first pole 4 and the third pole 12) which are adjacent to the protrusions can pass through the positions consistent with the radial magnetic circuit direction, the influence on the radial magnetic poles cannot be caused, and magnetic leakage can be prevented, for example, the first pole 4 and the second pole 11 of the two-pole radial magnetic circuit are the first pole 4 and the second pole 11, and partial radial magnetic circuit can pass through the upper magnetic pole due to the fact that the magnetic poles are round in the axial direction, so that the radial magnetic leakage exists. The axial magnetic circuit has only an enhancement (positive effect) to the radial magnetic circuit, with an enhancement of the air-gap field of the radial small teeth in a single quadrant.
Referring to fig. 4, in some embodiments, the number of the first outer pole blocks 9 is at least 4, and the second pole 11 corresponds to one first outer pole block 9; at least 4 second external pole blocks 10 are provided, and one second external pole block 10 corresponds to the second pole 11. In the technical scheme, different assembly structures are provided, the magnetic leakage phenomenon of a radial magnetic circuit on an adjacent radial pole on the outer circle of the axial stator is avoided, and only the air gap magnetic field on the radial pole is enhanced. When the stator is installed, the first outer pole block 9 (the second outer pole block 10) of the axial stator and the pole column of the radial stator 6 can be tightly adhered in the axial direction, and small clearance fit can also be adopted. The first outer pole block 9 (the second outer pole block 10) on the axial stator adopts a block structure, a single coil is wound in an inner groove, the second pole 11 and the first pole 4 corresponding to the E-shaped structure are all pointed to the circumference (or all pointed to the circle center) during assembly, and the air gap magnetic fields of the second pole 11 and the first pole 4 of the E-shaped structure are enhanced.
In some embodiments, as shown in fig. 1, an axially inner working gap 16 is provided between the first inner pole piece 13 and the end face of the bearing rotor 7, an axially outer working gap is provided between the first outer pole piece 9 and the circumferential wall of the radial stator 6, and the first outer pole piece 9 is located radially inward of the radial coil 5. A radial working gap 15 is provided between the radial stator 6 and the outer circumferential wall of the bearing rotor 7. Specifically, an axial magnetic circuit 001 is formed among the first axial stator 1, the bearing rotor 7 and the radial stator 6, and the axial magnetic circuit 001 passes through the first outer pole block 9, the axial outer working gap, the pole post, the radial working gap 15, the bearing rotor 7, the axial inner working gap 16 and the first inner pole block 13 to be closed back to the first axial stator 1. In this technical scheme, first outer pole piece 9 is located radial inboard of radial coil 5, and not correspond the setting with the stator yoke 17 of radial stator 6, can reduce the magnetic leakage of radial magnetic circuit 002 in the axial direction, stop the inhomogeneous condition in axial output circumference.
In some embodiments, an axially inner working gap 16 is provided between the second inner pole piece 14 and the end face of the bearing rotor 7, an axially outer working gap is provided between the second outer pole piece 10 and the circumferential wall of the radial stator 6, and the second outer pole piece 10 is located radially inward of the radial coil 5. Specifically, an axial magnetic circuit 001 is formed among the second axial stator 2, the bearing rotor 7 and the radial stator 6, and the axial magnetic circuit 001 passes through the second outer pole block 10, the axial outer working gap, the pole post, the radial working gap 15, the bearing rotor 7, the axial inner working gap 16 and the second inner pole block 14 to be closed back to the second axial stator 2. In this technical scheme, the second outer pole piece 10 is located radial inboard of radial coil 5, and does not set up with the stator yoke 17 of radial stator 6 correspondingly, can reduce the magnetic leakage of radial magnetic circuit 002 in the axial direction, stops the inhomogeneous condition in axial output circumference. When the bearing rotor 7 is required to be controlled to move to one side, the winding current in the first axial stator 1 is increased, the bearing rotor 7 receives a large force to one side, otherwise, when the bearing rotor is required to be controlled to move to the other side, the winding current of the second axial stator 2 is increased, and the bearing rotor 7 receives a large force to the other side, so that the axial movement of the bearing rotor 7 is controlled by controlling the winding currents of the first axial stator 1 and the second axial stator 2.
The invention also provides a motor comprising the magnetic suspension active bearing.
The invention also provides a compressor comprising the motor.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (9)
1. The utility model provides a magnetic suspension initiative bearing which characterized in that: comprising the following steps: the bearing rotor (7) is sleeved on the periphery of the rotating shaft (8), the first axial stator (1) and the second axial stator (2) are positioned on the periphery of the rotating shaft (8), the first axial stator (1) is positioned at one end of the bearing rotor (7) along the axial direction of the bearing rotor (7), the second axial stator (2) is positioned at the other end of the bearing rotor (7), and the radial stator (6) is positioned on the periphery of the bearing rotor (7);
The radial stator (6) comprises a stator yoke (17), 12 polar posts are arranged on the stator yoke (17) along the radial direction of the bearing rotor (7), the 12 polar posts face the bearing rotor (7), the 12 polar posts are divided into 4 groups of polar posts on the radial section of the bearing rotor (7), the 4 groups of polar posts are symmetrically distributed on the stator yoke (17), the magnetic poles of two adjacent polar posts in each group of polar posts are opposite in polarity, radial coils (5) are arranged on the 12 polar posts, and the radial coils (5) can generate radial magnetic force on the bearing rotor (7) through power so as to enable the bearing rotor (7) to radially suspend; each group of the poles comprises a first pole (4), a second pole (11) and a third pole (12), wherein the second pole (11) is positioned between the first pole (4) and the third pole (12), the first pole (4) is symmetrical to the third pole (12), and the polarities of the magnetic poles of the first pole (4) and the second pole (11) and the polarities of the magnetic poles of the second pole (11) and the magnetic poles of the third pole (12) are opposite;
the width of the first pole (4) is the same as that of the third pole (12), and the width of the second pole (11) is larger than that of the third pole (12);
The first axial stator (1) comprises a plurality of first outer pole blocks (9) and first inner pole blocks (13), the plurality of first outer pole blocks (9) are arranged at intervals along the circumferential direction of the first axial stator (1), and an axial coil (3) is arranged between the first outer pole blocks (9) and the first inner pole blocks (13); the second axial stator (2) comprises a plurality of second outer pole blocks (10) and second inner pole blocks (14), an axial coil (3) is arranged between the second outer pole blocks (10) and the second inner pole blocks (14), the second outer pole blocks (10) are arranged at intervals along the circumferential direction of the first axial stator (1), the axial coil (3) can generate axial magnetic force for the bearing rotor (7) so as to enable the bearing rotor (7) to axially suspend, and the first outer pole blocks and the second outer pole blocks are respectively in one-to-one correspondence with pole columns with the same polarity in 12 pole columns on the stator magnet yoke (17).
2. The magnetically levitated active bearing of claim 1, wherein: at least 4 first outer pole blocks (9) are arranged between two adjacent groups of pole posts, and each two adjacent pole posts corresponds to one first outer pole block (9);
The number of the second external pole blocks (10) is at least 4, and two adjacent groups of pole columns are arranged between the two adjacent groups of pole columns, and each two adjacent pole columns corresponds to one second external pole block (10).
3. The magnetically levitated active bearing of claim 1, wherein: at least 4 first outer pole blocks (9) are arranged, and the second pole (11) corresponds to one first outer pole block (9);
at least 4 second external pole blocks (10) are arranged, and one second external pole block (10) corresponds to the second pole (11).
4. The magnetically levitated active bearing of claim 1, wherein: an axial inner working gap (16) is formed between the first inner pole block (13) and the end face of the bearing rotor (7), an axial outer working gap is formed between the first outer pole block (9) and the peripheral wall of the radial stator (6), and the first outer pole block (9) is located on the radial inner side of the radial coil (5).
5. The magnetically levitated active bearing of claim 4, wherein: an axial magnetic circuit (001) is formed between the first axial stator (1), the bearing rotor (7) and the radial stator (6), and the axial magnetic circuit (001) passes through the first outer pole block (9) -the axial outer working gap-the pole column-the bearing rotor (7) -the axial inner working gap (16) -the first inner pole block (13) is closed back to the first axial stator (1).
6. The magnetically levitated active bearing of claim 1, wherein: an axial inner working gap (16) is formed between the second inner pole block (14) and the end face of the bearing rotor (7), an axial outer working gap is formed between the second outer pole block (10) and the peripheral wall of the radial stator (6), and the second outer pole block (10) is located on the radial inner side of the radial coil (5).
7. The magnetically levitated active bearing of claim 6, wherein: an axial magnetic circuit (001) is formed among the second axial stator (2), the bearing rotor (7) and the radial stator (6), and the axial magnetic circuit (001) passes through the second outer pole block (10) -the axial outer working gap-the pole column-the bearing rotor (7) -the axial inner working gap (16) -the second inner pole block (14) is closed back to the second axial stator (2).
8. An electric machine comprising a magnetically levitated active bearing according to any one of claims 1 to 7.
9. A compressor comprising the motor of claim 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211259974.2A CN115654016B (en) | 2022-10-14 | 2022-10-14 | Magnetic suspension active bearing, motor and compressor |
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| CN202211259974.2A CN115654016B (en) | 2022-10-14 | 2022-10-14 | Magnetic suspension active bearing, motor and compressor |
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| CN115654016A CN115654016A (en) | 2023-01-31 |
| CN115654016B true CN115654016B (en) | 2024-07-02 |
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| CN117588493B (en) * | 2024-01-19 | 2024-04-16 | 山东天瑞重工有限公司 | Radial-axial integrated magnetic suspension bearing and magnetic suspension motor for air compressor |
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| CN115654015A (en) * | 2022-10-14 | 2023-01-31 | 珠海格力电器股份有限公司 | Magnetic suspension active bearing, motor and compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131313A (en) * | 2019-05-23 | 2019-08-16 | 南京邮电大学 | a magnetic bearing |
| CN115654015A (en) * | 2022-10-14 | 2023-01-31 | 珠海格力电器股份有限公司 | Magnetic suspension active bearing, motor and compressor |
| CN115654019A (en) * | 2022-10-14 | 2023-01-31 | 珠海格力电器股份有限公司 | Magnetic suspension active three-degree-of-freedom bearing, motor and compressor |
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| Publication number | Publication date |
|---|---|
| CN115654016A (en) | 2023-01-31 |
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