Water-cooled, air-cooled, magnetically suspended high-speed brushless motor

Abstract

The water-cooled and air-cooled magnetic levitation high-speed brushless motor includes a coil and a rotating shaft. The shaft sleeve is composed of a shaft sleeve formed on a shaft sleeve disk. The shaft sleeve has a shaft sleeve center hole. The outer ring of the bearing is fixed on the inner wall of the shaft sleeve center hole by interference fit. The outer diameter surface of the rotating shaft is inserted into the inner ring of the bearing and fixed together by interference fit. A plurality of arc blocks are formed on the outer diameter surface of the shaft sleeve. A plurality of arc blocks of the same size are distributed on the shaft sleeve in a circular array with the center of the shaft sleeve as the center. An arc block ventilation groove is formed between two adjacent arc blocks. The magnetic isolation ring is fixed on the outer diameter surface of the plurality of arc blocks by hot pressing, and the supporting magnetic cylinder is fixed on the magnetic isolation ring by hot pressing. It uses water cooling and air cooling to quickly cool down the rotating shaft, the coil and the bearing to prevent the motor from being damaged due to high temperature. The rotating shaft is subjected to the magnetic levitation force of the supporting magnetic block during rotation. The rotating shaft runs in a balanced manner, with low noise and long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly to a high-speed brushless motor. Background Art

[0002] At present, the speed of domestically produced motors is generally less than 50,000 revolutions per minute, while the high-speed motors produced abroad can reach 50,000 to 120,000 revolutions per minute. The price of foreign high-speed motors with a power of about 20 kilowatts is generally higher, and each high-speed motor costs 40,000 to 50,000 yuan.

[0003] In order to quickly fill hydrogen into hydrogen cylinders, we need to use a high-speed motor, but domestic motor manufacturers currently do not have motors that can reach more than 50,000 revolutions per minute for sale. So we need to develop a motor that can reach more than 50,000 revolutions per minute.

[0004] The difficulties in developing high-speed motors are: 1. At high speeds, the shaft and coil will generate a lot of heat, which must be removed in time, otherwise the motor will burn out due to high temperature. 2. The motor shaft generally needs to be fixed on the bearing. At high speeds, if the bearing has poor heat dissipation, it will burn out. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies of the prior art and to provide a water-cooled and air-cooled magnetic levitation high-speed brushless motor, which uses water cooling and air cooling to quickly cool down the shaft, coil and bearing to prevent the motor from being damaged by high temperature. During the rotation process, the shaft is subjected to the magnetic levitation force of the supporting magnetic block, and the shaft runs in a balanced manner, with low noise and long service life.

[0006] The technical solutions of the present invention are as follows:

[0007] The water-cooled and air-cooled magnetic suspension high-speed brushless motor comprises a coil and a rotating shaft, wherein the sleeve is formed with a sleeve on a sleeve disk, the sleeve has a sleeve center hole, the outer ring of the bearing is fixed on the inner wall of the sleeve center hole by interference fit, and the outer diameter surface of the rotating shaft is inserted into the inner ring of the bearing and fixed together by interference fit;

[0008] A plurality of arc blocks are formed on the outer diameter surface of the shaft sleeve, and a plurality of arc blocks of the same size are distributed on the shaft sleeve in a circular array with the center of the shaft sleeve as the center, and an arc block ventilation groove is formed between two adjacent arc blocks, and the magnetic isolation ring is fixed on the outer diameter surface of the plurality of arc blocks by hot pressing, and the supporting magnetic cylinder is fixed on the magnetic isolation ring by hot pressing;

[0009] A rotating shaft disk is formed at the lower end of the rotating shaft, a rotating magnetic cylinder is fixed on the inner diameter surface of the pure iron sleeve by hot pressing, a protective sleeve made of carbon fiber material is fixed on the outer diameter surface of the pure iron sleeve by hot pressing, and the lower end of the pure iron sleeve is fixed on the rotating shaft disk by hot pressing;

[0010] The supporting magnetic cylinder is inserted into the rotating magnetic cylinder, and the distance between the outer diameter surface of the supporting magnetic cylinder and the inner diameter of the rotating magnetic cylinder is 0.3 to 0.8 mm; the structure of the supporting magnetic cylinder is: it is formed into a cylinder by an outer cylindrical block and an inner cylindrical block, and the magnetic polarities of the outer cylindrical block and the inner cylindrical block are opposite;

[0011] The structure of the rotating magnetic cylinder is: it is composed of a front rotating magnetic cylinder and a rear rotating magnetic cylinder. The structure of the front rotating magnetic cylinder is: an outer rotating magnetic cylinder block and an inner rotating magnetic cylinder block are formed into a cylinder, the magnetic polarities of the outer rotating magnetic cylinder block and the inner rotating magnetic cylinder block are opposite, and the inner rotating magnetic cylinder block is opposite to the outer cylinder block and has the same magnetic polarity.

[0012] The structure of the rear-stage rotating magnetic cylinder is: a plurality of rotating magnetic cylinder outer arc-shaped magnetic blocks of the same size are formed into a circle in an annular array, a plurality of rotating magnetic cylinder inner arc-shaped magnetic blocks of the same size are formed into a circle in an annular array, the rotating magnetic cylinder inner arc-shaped magnetic blocks are formed together with the rotating magnetic cylinder outer arc-shaped magnetic blocks, the magnetic polarities of the two adjacent rotating magnetic cylinder outer arc-shaped magnetic blocks are opposite, the magnetic polarities of the two adjacent rotating magnetic cylinder inner arc-shaped magnetic blocks are opposite, and the magnetic polarities of the opposite rotating magnetic cylinder outer arc-shaped magnetic blocks and the rotating magnetic cylinder inner arc-shaped magnetic blocks are opposite;

[0013] The lock sleeve is fixed on the rotating shaft by hot pressing, and the lock sleeve is inserted into the center hole of the shaft sleeve and the center hole of the shaft sleeve cover; the lower end surface of the lock sleeve is pressed on the inner ring of the bearing;

[0014] The coil is fixed on the plastic cylinder, and the plastic cylinder is fixed on the outer diameter surface of the shaft sleeve by hot pressing; the shaft sleeve cover is fixed on the shaft sleeve disk by screws, and a sleeve disk water cooling channel is formed on the shaft sleeve disk, an inner O-ring and an outer O-ring are clamped between the shaft sleeve cover and the shaft sleeve disk, and the sleeve disk water cooling channel is located between the inner O-ring and the outer O-ring; a water inlet channel and a water outlet channel are formed on the shaft sleeve cover, and the water inlet channel and the water outlet channel are connected with the sleeve disk water cooling channel; an air inlet hole is formed on the rotating shaft disk, and the power supply wire of the coil passes through the ventilation groove of the arc block.

[0015] The dust cover is fixed to the shaft sleeve disk by screws, a plurality of dust cover heat dissipation holes are formed on the outer diameter surface of the dust cover, a dust cover air inlet hole is formed on the bottom plate of the dust cover, an air filter is fixed on the dust cover and covers the dust cover air inlet hole, and the power supply wire of the coil coming out of the arc block ventilation groove is led out from the preset wire hole on the dust cover and electrically connected to the coil controller.

[0016] The at least three triangular air inlet holes are distributed in a circular array on the rotating shaft disk with the center of the rotating shaft disk as the center, and at least one inner wall surface of the triangular air inlet hole is an inclined surface.

[0017] The shaft sleeve is made of alloy copper material, the magnetic isolation ring is made of pure iron material, and there are four bearings, which are silicon carbide ball bearings.

[0018] The pure iron sleeve is formed with a pure iron sleeve step surface, and the lower end of the rotating magnetic cylinder is pressed on the pure iron sleeve step surface; the rotating shaft disk is formed with a rotating shaft disk step surface, and a surface of the pure iron sleeve is pressed against the rotating shaft disk step surface.

[0019] The outer diameter surface of the rotating shaft is sleeved and fixed with a rotating shaft permanent magnet cylinder by interference fit. The rotating shaft permanent magnet cylinder is composed of a rotating shaft permanent magnet magnetic shielding sleeve and a rotating shaft permanent magnet cylinder body that are hot-pressed and fixed together. The rotating shaft permanent magnet magnetic shielding sleeve is a pure iron sleeve. The rotating shaft permanent magnet cylinder body is a magnetized cylinder body, and its magnetic properties are divided into an outer rotating shaft permanent magnet cylinder body and an inner rotating shaft permanent magnet cylinder body. The magnetic properties of the outer rotating shaft permanent magnet cylinder body and the inner rotating shaft permanent magnet cylinder body are different.

[0020] A sleeve permanent magnet cylinder is inserted on the inner diameter surface of the sleeve and fixed by interference fit. The sleeve permanent magnet cylinder is composed of a sleeve permanent magnet magnetic shielding sleeve and a sleeve permanent magnet cylinder body that are hot-pressed and fixed together. The sleeve permanent magnet magnetic shielding sleeve is a pure iron sleeve, and the sleeve permanent magnet cylinder body is a magnetized cylinder body. Its magnetic properties are divided into an outer sleeve permanent magnet cylinder body and an inner sleeve permanent magnet cylinder body. The outer sleeve permanent magnet cylinder body and the inner sleeve permanent magnet cylinder body have different magnetic properties.

[0021] The inner sleeve permanent magnet cylinder has the same magnetic properties as the outer shaft permanent magnet cylinder. One end face of the shaft permanent magnet cylinder magnetic isolation sleeve is pressed on the inner ring of the bearing, and the other end face is pressed on the shaft permanent magnet cylinder. One end face of the sleeve permanent magnet cylinder magnetic isolation sleeve is pressed on the outer ring of the bearing, and the other end face is pressed on the sleeve permanent magnet cylinder. The shaft permanent magnet cylinder is inserted into the sleeve permanent magnet cylinder, and the spacing between them is 0.3 to 0.8 mm.

[0022] The beneficial effects of the present invention are:

[0023] It uses water cooling and air cooling to quickly cool down the shaft, coil and bearing to prevent the motor from being damaged by high temperature. The shaft is subjected to the magnetic levitation force of the supporting magnet during rotation, so the shaft runs balanced, with low noise and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of Example 1;

[0025] Figure 2 is a three-dimensional schematic diagram of the shaft sleeve in Example 1;

[0026] Figure 3 This is a three-dimensional schematic diagram of the shaft sleeve in Example 1 observed from a different angle;

[0027] Figure 4 This is a schematic diagram of the structure of the supporting magnetic cylinder in Example 1;

[0028] Figure 5It is a schematic diagram of the structure of the rotating magnetic cylinder in Example 1;

[0029] Figure 6 This is a schematic diagram of the structure of the front-stage rotating magnetic cylinder in Example 1;

[0030] Figure 7 This is a schematic diagram of the structure of the rear-stage rotating magnetic cylinder in Example 1;

[0031] Figure 8 It is a structural schematic diagram of the rotating shaft in Example 1;

[0032] Fig. 9 It is a structural schematic diagram of Example 2;

[0033] Fig.10 It is a structural schematic diagram of the permanent magnet cylinder of the rotating shaft;

[0034] Fig.11 It is a schematic diagram of the structure of the shaft sleeve permanent magnet cylinder.

[0035] In the figure: 1. Coil; 2. Rotating shaft; 3. Bushing; 4. Bearing; 5. Magnetic isolation ring; 6. Supporting magnetic cylinder; 7. Rotating magnetic cylinder; 8. Pure iron sleeve; 9. Protective sleeve made of carbon fiber material; 10. Plastic cylinder; 11. Bushing cover; 12. Inner O-ring; 13. Outer O-ring; 14. Dust cover; 15. Air filter; 16. Locking sleeve; 17. Rotating shaft permanent magnetic cylinder; 18. Bushing permanent magnetic cylinder; 19. Magnetic isolation sleeve of rotating shaft permanent magnetic cylinder; 20. Magnetic isolation sleeve of bushing permanent magnetic cylinder. DETAILED DESCRIPTION

[0036] Example 1: See Figures 1 to 8 As shown, the water-cooled and air-cooled magnetic suspension high-speed brushless motor comprises a coil 1 and a rotating shaft 2, a sleeve 3 is formed by a sleeve disc 31 on which a sleeve 32 is formed, the sleeve 3 has a sleeve center hole 33, the outer ring of the bearing 4 is fixed on the inner wall of the sleeve center hole 33 by interference fit, and the outer diameter surface of the rotating shaft 2 is inserted into the inner ring of the bearing 4 and fixed together by interference fit;

[0037] A plurality of arc blocks 34 are formed on the outer diameter surface of the shaft sleeve 32. The arc blocks 34 of the same size are distributed on the shaft sleeve 32 in a circular array with the center of the shaft sleeve 32 as the center. An arc block ventilation groove 35 is formed between two adjacent arc blocks 34. The magnetic isolation ring 5 is fixed on the outer diameter surface of the plurality of arc blocks 34 by heat pressing, and the supporting magnetic cylinder 6 is fixed on the magnetic isolation ring 5 by heat pressing.

[0038] The lower end of the rotating shaft 2 is formed with a rotating shaft disk 2a, the rotating magnetic cylinder 7 is hot-pressed and fixed on the inner diameter surface of the pure iron sleeve 8, the protective sleeve 9 made of carbon fiber material is hot-pressed and fixed on the outer diameter surface of the pure iron sleeve 8, and the lower end of the pure iron sleeve 8 is hot-pressed and fixed on the rotating shaft disk 2a;

[0039] The support magnetic cylinder 6 is inserted into the rotating magnetic cylinder 7, and the distance between the outer diameter surface of the support magnetic cylinder 6 and the inner diameter of the rotating magnetic cylinder 7 is 0.3 to 0.8 mm; the structure of the support magnetic cylinder 6 is: it is formed into a cylinder by an outer cylindrical block 61 and an inner cylindrical block 62, and the magnetic polarities of the outer cylindrical block 61 and the inner cylindrical block 62 are opposite;

[0040] The structure of the rotating magnetic cylinder 7 is: it is composed of a front rotating magnetic cylinder 7a and a rear rotating magnetic cylinder 7b. The structure of the front rotating magnetic cylinder 7a is: an outer rotating magnetic cylinder block 73 and an inner rotating magnetic cylinder block 74 are formed into a cylinder, the magnetic polarities of the outer rotating magnetic cylinder block 73 and the inner rotating magnetic cylinder block 74 are opposite, and the inner rotating magnetic cylinder block 74 is opposite to the outer cylinder block 61 and has the same magnetic polarity;

[0041] The structure of the rear section rotating magnetic cylinder 7b is as follows: a plurality of rotating magnetic cylinder outer arc-shaped magnetic blocks 71 of the same size are formed into a circle in an annular array, a plurality of rotating magnetic cylinder inner arc-shaped magnetic blocks 72 of the same size are formed into a circle in an annular array, the rotating magnetic cylinder inner arc-shaped magnetic blocks 72 are formed together with the rotating magnetic cylinder outer arc-shaped magnetic blocks 71, the magnetic polarities of two adjacent rotating magnetic cylinder outer arc-shaped magnetic blocks 71 are opposite, the magnetic polarities of two adjacent rotating magnetic cylinder inner arc-shaped magnetic blocks 72 are opposite, and the magnetic polarities of the relative rotating magnetic cylinder outer arc-shaped magnetic blocks 71 and the rotating magnetic cylinder inner arc-shaped magnetic blocks 72 are opposite;

[0042] The lock sleeve 16 is fixed on the rotating shaft 2 by hot pressing, and the lock sleeve 16 is inserted into the center hole 33 of the shaft sleeve and the center hole of the shaft sleeve cover 11; the lower end surface of the lock sleeve 16 is pressed on the inner ring of the bearing 4;

[0043] The coil 1 is fixed on the plastic cylinder 10, and the plastic cylinder 10 is hot-pressed and fixed on the outer diameter surface of the shaft sleeve 32; the shaft sleeve cover 11 is fixed on the shaft sleeve disk 31 by screws, and a sleeve disk water cooling channel 311 is formed on the shaft sleeve disk 31, and an inner O-ring 12 and an outer O-ring 13 are clamped between the shaft sleeve cover 11 and the shaft sleeve disk 31, and the sleeve disk water cooling channel 311 is located between the inner O-ring 12 and the outer O-ring 13; a water inlet channel 111 and a water outlet channel 112 are formed on the shaft sleeve cover 11, and the water inlet channel 111 and the water outlet channel 112 are connected to the sleeve disk water cooling channel 311; an air inlet hole 2a1 is formed on the rotating shaft disk 2a, and the power supply wire 1a of the coil 1 passes through the arc block ventilation groove 35.

[0044] The dust cover 14 is fixed to the shaft sleeve disc 31 by screws, and a plurality of dust cover heat dissipation holes 141 are formed on the outer diameter surface of the dust cover 14, and a dust cover air inlet hole 142 is formed on the bottom plate of the dust cover 14. The air filter 15 is fixed to the dust cover 14 and covers the dust cover air inlet hole 142. The power supply wire 1a of the coil 1 coming out of the arc block ventilation groove 35 is led out from the preset wire hole on the dust cover 14 and electrically connected to the coil controller.

[0045] The at least three triangular air inlet holes 2a1 are distributed in a circular array on the rotating shaft disk 2a with the center of the rotating shaft disk 2a as the center. At least one inner wall surface 2a2 of the triangular air inlet holes 2a1 is an inclined surface.

[0046] The shaft sleeve 3 is made of alloy copper material, the magnetic isolation ring 5 is made of pure iron material, and there are four bearings 4, which are silicon carbide ball bearings.

[0047] The pure iron sleeve 8 is formed with a pure iron sleeve step surface 81, and the lower end of the rotating magnetic cylinder 7 is pressed on the pure iron sleeve step surface 81; the rotating shaft disk 2a is formed with a rotating shaft disk step surface 2a3, and a surface of the pure iron sleeve 8 is pressed against the rotating shaft disk step surface 2a3.

[0048] Example 2, see Figures 9 to 11 As shown, a shaft permanent magnet cylinder 17 is inserted and fixed with an interference fit on the outer diameter surface of the shaft 2, and the shaft permanent magnet cylinder 17 is composed of a shaft permanent magnet magnetic shielding sleeve 171 and a shaft permanent magnet cylinder body 172 that are hot-pressed and fixed together. The shaft permanent magnet magnetic shielding sleeve 171 is a pure iron sleeve, and the shaft permanent magnet cylinder body 172 is a magnetized cylinder body, and its magnetic properties are divided into an outer shaft permanent magnet cylinder body 1721 and an inner shaft permanent magnet cylinder body 1722, and the outer shaft permanent magnet cylinder body 1721 and the inner shaft permanent magnet cylinder body 1722 have different magnetic properties;

[0049] A sleeve permanent magnet cylinder 18 is inserted and fixed on the inner diameter surface of the sleeve 3 by interference fit. The sleeve permanent magnet cylinder 18 is composed of a sleeve permanent magnet magnetic shielding sleeve 181 and a sleeve permanent magnet cylinder body 182 that are hot-pressed and fixed together. The sleeve permanent magnet magnetic shielding sleeve 181 is a pure iron sleeve, and the sleeve permanent magnet cylinder body 182 is a magnetized cylinder body. Its magnetic properties are divided into an outer sleeve permanent magnet cylinder body 1821 and an inner sleeve permanent magnet cylinder body 1822. The outer sleeve permanent magnet cylinder body 1821 and the inner sleeve permanent magnet cylinder body 1822 have different magnetic properties.

[0050] The inner sleeve permanent magnet cylinder 1822 has the same magnetic properties as the outer shaft permanent magnet cylinder 1721. One end face of the shaft permanent magnet cylinder magnetic isolation sleeve 19 is pressed on the inner ring of the bearing 4, and the other end face is pressed on the shaft permanent magnet cylinder 17. One end face of the sleeve permanent magnet cylinder magnetic isolation sleeve 20 is pressed on the outer ring of the bearing 4, and the other end face is pressed on the sleeve permanent magnet cylinder 18. The shaft permanent magnet cylinder 17 is inserted into the sleeve permanent magnet cylinder 18, and the spacing is 0.3 to 0.8 mm. The rest is the same as in Example 1.

[0051] Working principle: The coil controller controls the current on the coil 1 to change continuously, so that the magnetic field of the coil 1 changes continuously, causing the rotating magnetic cylinder 7 to rotate. This is the same as the principle of the coil driving the shaft of the brushless motor. The coil controller can use the existing brushless motor coil controller.

[0052] The supporting magnetic cylinder 6 and the rotating magnetic cylinder 7 are magnetic cylinders custom-made by the manufacturer, and are both one-time hot-pressed products.

[0053] When the rotating magnetic cylinder 7 rotates, the rotating shaft 2 is driven to rotate, and the rotating shaft 2 outputs power outward. When the rotating shaft 2 rotates, the air inlet hole 2a1 supplies air into the rotating magnetic cylinder 7, blowing air to the coil 1, the rotating shaft 2 and the sleeve 3. In this way, the coil 1 and the rotating shaft 2 are air-cooled, and the bearing 4 is also air-cooled. The wind entering the rotating magnetic cylinder 7 through the air inlet hole 2a1 is mainly blown out from the arc block ventilation groove 35 and the dust cover heat dissipation holes 141, and a small part is blown out from the center hole 33 of the sleeve.

[0054] The cooling water enters the sleeve water cooling channel 311 from the water inlet channel 111 and flows out of the sleeve water cooling channel 311 from the water outlet channel 112. The sleeve 3 is cooled by water while being air-cooled. The heat energy on the coil 1, the rotating shaft 2 and the sleeve 3 can also be taken away by water cooling.

[0055] Initially, we did not add the supporting magnetic cylinder 6 to the present invention, and the rotating shaft 2 made a lot of noise when it was running. The supporting magnetic cylinder 6 of the present invention is opposite to the rotating magnetic cylinder 7, and has a certain magnetic levitation effect on the rotating magnetic cylinder 7. Before the supporting magnetic cylinder 6, the rotation speed of the present invention can generally only reach 40,000 to 50,000 revolutions per minute. After the supporting magnetic cylinder 6 is added, the rotation speed of the present invention can reach 68,900 revolutions per minute.

[0056] The triangular air inlet 2a1 has at least one inner wall 2a2 that is an inclined surface. In this way, when the rotating shaft disk 2a rotates, air can be blown into the rotating magnetic cylinder 7 from the air inlet 2a1. Initially, we designed the air inlet 2a1 as a straight circular hole or a triangular hole, which had a poor air intake effect. The current design allows a large amount of air to be taken in, allowing the interior of the present invention to be fully air-cooled.

[0057] Working principle of Example 2: The shaft permanent magnet tube magnetic isolation sleeve 19 and the shaft sleeve permanent magnet tube magnetic isolation sleeve 20 are made of aluminum alloy material. In this embodiment, the magnetic levitation force is mainly generated between the shaft 2 and the shaft sleeve 3 through the shaft permanent magnet tube 17 and the shaft sleeve permanent magnet tube 18, so that the service life of the bearing 4 will be longer.

Claims

1. A water-cooled and air-cooled magnetic suspension high-speed brushless motor, comprising a coil (1) and a rotating shaft (2), characterized in that: The shaft sleeve (3) is composed of a shaft sleeve disk (31) on which a shaft sleeve (32) is formed. The shaft sleeve (3) has a shaft sleeve center hole (33). The outer ring of the bearing (4) is fixed on the inner wall of the shaft sleeve center hole (33) by interference fit. The outer diameter surface of the rotating shaft (2) is inserted into the inner ring of the bearing (4) and is fixed together by interference fit. A plurality of arc blocks (34) are formed on the outer diameter surface of the shaft sleeve (32); the plurality of arc blocks (34) of the same size are distributed on the shaft sleeve (32) in a circular array with the center of the shaft sleeve (32) as the center; an arc block ventilation groove (35) is formed between two adjacent arc blocks (34); a magnetic isolation ring (5) is fixed on the outer diameter surfaces of the plurality of arc blocks (34) by heat pressing; and a supporting magnetic cylinder (6) is fixed on the magnetic isolation ring (5) by heat pressing; The lower end of the rotating shaft (2) is formed with a rotating shaft disk (2a), the rotating magnetic cylinder (7) is fixed on the inner diameter surface of the pure iron sleeve (8) by hot pressing, the protective sleeve (9) made of carbon fiber material is fixed on the outer diameter surface of the pure iron sleeve (8) by hot pressing, and the lower end of the pure iron sleeve (8) is fixed on the rotating shaft disk (2a) by hot pressing; The supporting magnetic cylinder (6) is inserted into the rotating magnetic cylinder (7), and the distance between the outer diameter surface of the supporting magnetic cylinder (6) and the inner diameter of the rotating magnetic cylinder (7) is 0.3 to 0.8 mm. The structure of the supporting magnetic cylinder (6) is that it is formed into a cylinder by an outer cylindrical block (61) and an inner cylindrical block (62), and the magnetic polarities of the outer cylindrical block (61) and the inner cylindrical block (62) are opposite. The structure of the rotating magnetic cylinder (7) is as follows: it is composed of a front rotating magnetic cylinder (7a) and a rear rotating magnetic cylinder (7b); the structure of the front rotating magnetic cylinder (7a) is as follows: an outer rotating magnetic cylinder block (73) and an inner rotating magnetic cylinder block (74) are formed into a cylinder; the magnetic polarities of the outer rotating magnetic cylinder block (73) and the inner rotating magnetic cylinder block (74) are opposite; the inner rotating magnetic cylinder block (74) is opposite to the outer cylinder block (61) and has the same magnetic polarity; The structure of the rear section rotating magnetic cylinder (7b) is as follows: a plurality of rotating magnetic cylinder outer arc-shaped magnetic blocks (71) of the same size are formed together in a circular array into a circle, a plurality of rotating magnetic cylinder inner arc-shaped magnetic blocks (72) of the same size are formed together in a circular array into a circle, the rotating magnetic cylinder inner arc-shaped magnetic blocks (72) are formed together with the rotating magnetic cylinder outer arc-shaped magnetic blocks (71), the magnetic polarities of two adjacent rotating magnetic cylinder outer arc-shaped magnetic blocks (71) are opposite, the magnetic polarities of two adjacent rotating magnetic cylinder inner arc-shaped magnetic blocks (72) are opposite, and the magnetic polarities of the rotating magnetic cylinder outer arc-shaped magnetic blocks (71) and the rotating magnetic cylinder inner arc-shaped magnetic blocks (72) that are opposite to each other are opposite; The locking sleeve (16) is fixed on the rotating shaft (2) by hot pressing, and the locking sleeve (16) is inserted into the central hole of the shaft sleeve (33) and the central hole of the shaft sleeve cover (11); the lower end surface of the locking sleeve (16) is pressed on the inner ring of the bearing (4); The coil (1) is fixed on the plastic cylinder (10), and the plastic cylinder (10) is fixed on the outer diameter surface of the shaft sleeve (32) by hot pressing; the shaft sleeve cover (11) is fixed on the shaft sleeve disc (31) by screws, and the shaft sleeve disc (31) is formed with a sleeve disc water cooling channel (311), and an inner O-type sealing ring (12) and an outer O-type sealing ring (13) are clamped between the shaft sleeve cover (11) and the shaft sleeve disc (31), and the sleeve disc water cooling channel (311) Located between the inner O-ring (12) and the outer O-ring (13); a water inlet channel (111) and a water outlet channel (112) are formed on the shaft sleeve cover (11), and the water inlet channel (111) and the water outlet channel (112) are connected to the sleeve disk water cooling channel (311); an air inlet hole (2a1) is formed on the rotating shaft disk (2a), and the power supply wire (1a) of the coil (1) passes through the arc block ventilation groove (35).

2. The water-cooled and air-cooled magnetic suspension high-speed brushless motor according to claim 1 is characterized in that: The dust cover (14) is fixed to the shaft sleeve disk (31) by screws, a plurality of dust cover heat dissipation holes (141) are formed on the outer diameter surface of the dust cover (14), a dust cover air inlet hole (142) is formed on the bottom plate of the dust cover (14), an air filter (15) is fixed to the dust cover (14) and covers the dust cover air inlet hole (142), and a power supply wire (1a) of the coil (1) coming out of the arc block ventilation groove (35) is led out from a preset wire hole on the dust cover (14) and electrically connected to the coil controller.

3. The water-cooled and air-cooled magnetic suspension high-speed brushless motor according to claim 1 is characterized in that: No less than three triangular air inlet holes (2a1) are distributed on the rotating shaft disk (2a) in a circular array with the center of the rotating shaft disk (2a) as the center, and at least one inner wall surface (2a2) of the triangular air inlet holes (2a1) is an inclined surface.

4. The water-cooled and air-cooled magnetic suspension high-speed brushless motor according to claim 1 is characterized in that: The shaft sleeve (3) is made of alloy copper material, the magnetic isolation ring (5) is made of pure iron material, and there are four bearings (4), which are silicon carbide ball bearings.

5. The water-cooled and air-cooled magnetic suspension high-speed brushless motor according to claim 1 is characterized in that: A pure iron sleeve step surface (81) is formed on the pure iron sleeve (8), and the lower end of the rotating magnetic cylinder (7) is pressed on the pure iron sleeve step surface (81); a rotating shaft disc step surface (2a3) is formed on the rotating shaft disc (2a), and a surface on the pure iron sleeve (8) is pressed against the rotating shaft disc step surface (2a3).

6. The water-cooled and air-cooled magnetic suspension high-speed brushless motor according to claim 1 is characterized in that: A rotating shaft permanent magnet cylinder (17) is inserted and fixed on the outer diameter surface of the rotating shaft (2) with an interference fit. The rotating shaft permanent magnet cylinder (17) is composed of a rotating shaft permanent magnet magnetic shielding sleeve (171) and a rotating shaft permanent magnet cylinder body (172) fixed together by hot pressing. The rotating shaft permanent magnet magnetic shielding sleeve (171) is a pure iron sleeve, and the rotating shaft permanent magnet cylinder body (172) is a magnetized cylinder body. The magnetic properties of the rotating shaft permanent magnet cylinder body (1721) and the inner rotating shaft permanent magnet cylinder body (1722) are different. A shaft sleeve permanent magnet cylinder (18) is inserted and fixed on the inner diameter surface of the shaft sleeve (3) with an interference fit. The shaft sleeve permanent magnet cylinder (18) is composed of a shaft sleeve permanent magnet magnetic shielding sleeve (181) and a shaft sleeve permanent magnet cylinder body (182) fixed together by hot pressing. The shaft sleeve permanent magnet magnetic shielding sleeve (181) is a pure iron sleeve, and the shaft sleeve permanent magnet cylinder body (182) is a magnetized cylinder body. The magnetism of the shaft sleeve permanent magnet cylinder body (1821) and the inner shaft sleeve permanent magnet cylinder body (1822) are different. The inner layer shaft sleeve permanent magnet cylinder (1822) has the same magnetic properties as the outer layer shaft permanent magnet cylinder (1721); one end face of the shaft permanent magnet cylinder magnetic isolation sleeve (19) is pressed on the inner ring of the bearing (4), and the other end face is pressed on the shaft permanent magnet cylinder (17); one end face of the shaft sleeve permanent magnet cylinder magnetic isolation sleeve (20) is pressed on the outer ring of the bearing (4), and the other end face is pressed on the shaft sleeve permanent magnet cylinder (18); the shaft permanent magnet cylinder (17) is inserted into the shaft sleeve permanent magnet cylinder (18), and the spacing between them is 0.3 to 0.8 mm.

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