A magnetically suspended high-speed motor based on a centrifugal air-cooled structure

Abstract

The present invention discloses a magnetic levitation high-speed motor based on a centrifugal air-cooling structure, which belongs to the technical field of magnetic levitation high-speed motors, and includes a main body component, wherein the main body component includes a front cover, a motor shaft, two magnetic levitation bearings, a rotor, a stator core, a casing, a rear cover, a protective cover, a protective net, a guide fan and an exhaust hole; the rotor is installed on the outer wall of the motor shaft. When the motor shaft of the present invention rotates, it drives the guide fan to rotate at a high speed, and a negative pressure is formed at the position of the exhaust hole. At this time, the external air flows into the heat dissipation flow channel through the intake flow channel, absorbs the heat in the stator core, and then flows into the interior of the casing, and then flows in the gap between the rotor and the stator core, and finally is discharged from the exhaust hole. During the flow of air, the heat inside the stator core and the rotor can be taken away, thereby avoiding the accumulation of heat, and realizing efficient heat dissipation of the stator and the rotor.

Description

Technical Field

[0001] The invention relates to a magnetic levitation high-speed motor, in particular to a magnetic levitation high-speed motor based on a centrifugal air-cooling structure, belonging to the technical field of magnetic levitation high-speed motors. Background Art

[0002] As an advanced high-speed motor, the magnetic levitation motor uses magnetic levitation bearing technology to achieve a mechanical friction-free state of the rotor during operation, significantly improving its speed performance and eliminating the friction loss caused by traditional mechanical bearings, thereby greatly improving the overall efficiency of the motor.

[0003] However, while pursuing high performance, high-speed magnetic levitation motors also face severe heat dissipation defects. In order to ensure that the heat generated by the internal components of the motor during high-speed operation can be dissipated in time, it is usually necessary to configure corresponding heat dissipation components on the motor.

[0004] In the design of the existing magnetic levitation motor heat dissipation mechanism, cooling air is often introduced only from one end of the magnetic bearing, then passes through the magnetic bearing, flows through the narrow air gap between the stator and the rotor, and is finally discharged from the other end of the magnetic bearing. However, the heat dissipation effect of this air-cooling method is poor, and the heat inside the motor is difficult to be evenly distributed and effectively removed, especially in the internal area of ​​the stator and the mover. The problem of heat accumulation is particularly prominent, which not only affects the heat dissipation efficiency, but also makes it difficult to achieve efficient heat dissipation of the stator and the mover. For this reason, a magnetic levitation high-speed motor based on a centrifugal air-cooling structure is proposed. Summary of the invention

[0005] The object of the present invention is to provide a magnetically suspended high-speed motor based on a centrifugal air-cooling structure to solve one of the problems raised in the above background technology.

[0006] The present invention is implemented by the following technical solutions: A magnetic suspension high-speed motor based on a centrifugal air-cooling structure comprises a main body assembly, wherein the main body assembly comprises a front end cover, a motor shaft, two magnetic suspension bearings, a rotor, a stator core, a casing, a rear end cover, a protective cover and a guide fan;

[0007] The rotor is mounted on the outer side wall of the motor shaft, the motor shaft is coaxially connected to the front cover and the rear cover through two magnetic bearings, the front cover and the rear cover are symmetrically mounted on both ends of the casing, the protective cover is coaxially fixedly connected to one side of the rear cover, the stator core is mounted inside the casing, the guide fan is fixedly connected to the outer side wall of the motor shaft, and a plurality of exhaust holes are evenly opened on the rear cover;

[0008] A heat dissipation component is arranged inside the main body component;

[0009] The heat dissipation assembly includes a heat dissipation channel, an intake channel, a limiting ring, a dustproof net, a spring and a limiting groove;

[0010] The heat dissipation channel is evenly opened inside the stator core, the inlet channel is evenly opened on the outer wall of the casing, the limiting ring is fixedly connected to the outer wall of the casing, the limiting groove is opened inside the other side of the rear end cover, one side of the dustproof net is inserted into the inside of the limiting ring, and the other side of the dustproof net is slidably connected to the inner wall of the limiting groove, and the spring is located inside the limiting groove.

[0011] As a further preferred embodiment of the technical solution: a top ring is slidably connected inside the limit groove, a stator winding is wound inside the stator core, a protective net is coaxially fixedly installed on the inner wall of the protective cover, and the guide fan is located inside the protective cover.

[0012] As a further preferred embodiment of the technical solution: one end of the spring is fixedly connected to the inner wall of the limiting groove, and the other end of the spring is fixedly connected to one side of the top ring.

[0013] As a further preferred embodiment of the technical solution: the other side of the top ring presses against the side of the dustproof net away from the limiting ring, the dustproof net is annular, and the dustproof net is sleeved on the outer side wall of the casing.

[0014] As a further preferred embodiment of the present technical solution: the heat dissipation channel is communicated with the intake channel, and one end of the heat dissipation channel extends inward from one side of the stator core and passes through the outer wall of the stator core.

[0015] As a further preferred embodiment of the present technical solution: the dustproof net is arranged on the outside of the air inlet duct.

[0016] As a further preferred embodiment of the present technical solution: the heat dissipation assembly further includes a mounting groove, a conical wind shielding ring and a threaded connection sleeve;

[0017] The heat dissipation channel is opened inside the rotor, the intake channel is opened inside the motor shaft, the mounting groove is opened at one end of the motor shaft and communicates with the intake channel, the threaded connecting sleeve is fixedly connected to the dustproof net, the conical wind shielding ring is fixedly connected to the outer wall of the protective net, and the heat dissipation channel is S-shaped.

[0018] As a further preferred embodiment of the present technical solution: the heat dissipation channel is connected to the intake channel, the threaded connecting sleeve is threadedly connected to the inner wall of the mounting groove, the dustproof net is sheet-shaped, and one end of the heat dissipation channel extends inward from the inner wall of the rotor and passes through the far end of the rotor.

[0019] As a further preferred embodiment of the present technical solution: the guide fan is located between the rear end cover and the protective net.

[0020] As a further preferred embodiment of the technical solution: the rotor is located inside the stator core, and a mounting frame is fixedly connected to the lower side of the casing.

[0021] Advantages of the present invention: The present invention supplies power to the stator winding on the stator core, and the motor stator generates a magnetic field in a fixed direction, thereby driving the rotor to rotate. The rotor drives the motor shaft, and the motor shaft rotates through the magnetic suspension bearing. When the motor shaft rotates, it drives the guide fan to rotate at high speed, and a negative pressure is formed at the position of the exhaust hole. At this time, the external air flows into the heat dissipation flow channel through the intake air flow channel, absorbs the heat in the stator core and then flows into the interior of the casing, and then flows in the gap between the rotor and the stator core, and finally is discharged from the exhaust hole. During the flow of air, the heat inside the stator core and the rotor can be taken away, thereby avoiding heat accumulation and achieving efficient heat dissipation of the stator and the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a structural schematic diagram of a magnetic levitation high-speed motor based on a centrifugal air-cooling structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the casing structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the stator core structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the rear end cover structure of the present invention;

[0027] Figure 5 A schematic diagram of an air cooling channel according to a first embodiment of the present invention;

[0028] Figure 6 It is a disassembled view of the main assembly of the present invention;

[0029] Figure 7 It is a schematic diagram of the connection between the mounting frame and the housing of the present invention;

[0030] Figure 8 It is a schematic diagram of the rotor structure of the present invention;

[0031] Fig. 9 It is a schematic diagram of the connection between the dustproof net and the threaded connection sleeve of the present invention;

[0032] Fig.10 Schematic diagram of the air cooling channel of the second embodiment of the present invention.

[0033] In the figure: 101, main assembly; 11, front cover; 12, motor shaft; 13, magnetic bearing; 14, rotor; 15, stator winding; 16, stator core; 17, casing; 18, rear cover; 19, protective cover; 20, protective net; 21, guide fan; 22, exhaust hole; 23, mounting bracket; 301, heat dissipation assembly; 31, heat dissipation flow channel; 32, intake flow channel; 33, mounting groove; 34, limit ring; 35, dust net; 36, top ring; 37, spring; 38, limit groove; 39, conical wind shield ring; 40, threaded connecting sleeve. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1

[0036] In the prior art, the heat dissipation effect of the traditional air cooling method is poor. It is difficult to evenly distribute the heat inside the motor and effectively remove it. In particular, heat will accumulate in the internal area of ​​the stator, making it difficult to achieve efficient heat dissipation of the stator.

[0037] To do this, see Figure 1-Figure 6 The present invention provides a technical solution: a magnetic suspension high-speed motor based on a centrifugal air-cooling structure, comprising a main body component 101, the main body component 101 comprising a front cover 11, a motor shaft 12, two magnetic suspension bearings 13, a rotor 14, a stator core 16, a housing 17, a rear cover 18, a protective cover 19, a protective net 20, a guide fan 21 and an exhaust hole 22;

[0038] The rotor 14 is mounted on the outer side wall of the motor shaft 12. The motor shaft 12 is coaxially rotatably connected to the front cover 11 and the rear cover 18 through two magnetic bearings 13. The front cover 11 and the rear cover 18 are symmetrically mounted at both ends of the casing 17. The protective cover 19 is coaxially fixedly connected to one side of the rear cover 18. The stator core 16 is mounted inside the casing 17. The guide fan 21 is fixedly connected to the outer side wall of the motor shaft 12. A plurality of exhaust holes 22 are evenly opened on the rear cover 18. The stator core 16 is wound with a stator winding 15. A protective net 20 is coaxially fixedly mounted on the inner side wall of the protective cover 19. The guide fan 21 is located inside the protective cover 19.

[0039] The guide fan 21 is located between the rear end cover 18 and the protection net 20;

[0040] When the magnetic suspension high-speed motor is working, the stator winding 15 on the stator core 16 is powered, and the motor stator generates a magnetic field in a fixed direction, thereby driving the rotor 14 to rotate. The rotor 14 drives the motor shaft 12, and the motor shaft 12 rotates through the magnetic suspension bearing 13. The magnetic suspension bearing 13 can prevent the motor shaft 12 from generating mechanical friction when rotating, thereby effectively increasing the speed of the motor.

[0041] A heat dissipation component 301 is disposed inside the main component 101 .

[0042] In the first embodiment, specifically: the heat dissipation assembly 301 includes a heat dissipation channel 31, an inlet channel 32, a limiting ring 34, a dustproof net 35, a spring 37 and a limiting groove 38;

[0043] The heat dissipation channel 31 is evenly opened inside the stator core 16, the intake channel 32 is evenly opened on the outer wall of the housing 17, the limiting ring 34 is fixedly connected to the outer wall of the housing 17, the limiting groove 38 is opened inside the other side of the rear cover 18, one side of the dustproof net 35 is inserted into the inside of the limiting ring 34, and the other side of the dustproof net 35 is slidably connected to the inner wall of the limiting groove 38, the spring 37 is located inside the limiting groove 38, and the inside of the limiting groove 38 is slidably connected with a top ring 36;

[0044] The heat dissipation assembly 301 is used to realize air cooling of the motor stator. When the magnetic suspension motor is working, the motor shaft 12 drives the guide fan 21 to rotate at a high speed. Since the guide fan 21 is located between the rear cover 18 and the protective net 20, a negative pressure is formed at the position of the exhaust hole 22.

[0045] At this time, the external air flows into the heat dissipation channel 31 through the inlet flow channel 32, absorbs the heat in the stator core 16, and then flows into the interior of the casing 17, then flows from the gap between the rotor 14 and the stator core 16, and finally is discharged from the exhaust hole 22. During the flow process, the air can take away the heat inside the stator core 16, avoid heat accumulation, and achieve efficient heat dissipation of the stator.

[0046] In the first embodiment, specifically: one end of the spring 37 is fixedly connected to the inner side wall of the limiting groove 38, the other end of the spring 37 is fixedly connected to one side of the top ring 36, the other side of the top ring 36 supports the side of the dustproof net 35 away from the limiting ring 34, the dustproof net 35 is annular, and the dustproof net 35 is sleeved on the outer side wall of the housing 17;

[0047] The air entering the stator core 16 can be filtered through the dustproof net 35 to prevent dust from entering the housing 17;

[0048] The dustproof net 35 is sleeved on the outside of the inlet air duct 32;

[0049] When the dust screen 35 needs to be cleaned, the rear end cover 18 is removed to release the limit of the dust screen 35 so as to clean the dust screen 35;

[0050] The dustproof net 35 is installed in a snap-on manner, which makes it easy to disassemble and clean it.

[0051] In the first embodiment, specifically: the heat dissipation channel 31 is connected to the intake channel 32, one end of the heat dissipation channel 31 extends inward from one side of the stator core 16 and penetrates from the outer wall of the stator core 16, and the dustproof net 35 is sleeved on the outside of the intake channel 32. When the motor is working, the external air flows into the heat dissipation channel 31 from the intake channel 32, circulates in the casing 17, and is discharged from the exhaust hole 22, thereby realizing air cooling of the motor.

[0052] During operation, the stator winding 15 on the stator core 16 is powered, and the motor stator generates a magnetic field in a fixed direction, thereby driving the rotor 14 to rotate. The rotor 14 drives the motor shaft 12, and the motor shaft 12 rotates through the magnetic bearing 13. When the motor shaft 12 rotates, it drives the guide fan 21 to rotate at high speed. Since the guide fan 21 is located between the rear end cover 18 and the protective net 20, there is a negative pressure at the position of the exhaust hole 22. At this time, the external air flows into the heat dissipation channel 31 through the intake air channel 32, absorbs the heat in the stator core 16, and then flows into the interior of the casing 17, and then flows from the gap between the rotor 14 and the stator core 16, and finally is discharged from the exhaust hole 22. During the flow process, the air can take away the heat inside the stator core 16, avoid heat accumulation, and achieve efficient heat dissipation of the stator.

[0053] Embodiment 2

[0054] In the prior art, the heat dissipation effect of the traditional air cooling method is poor. It is difficult to evenly distribute the heat inside the motor and effectively remove it. In particular, heat will accumulate in the inner area of ​​the rotor, making it difficult to achieve efficient heat dissipation of the rotor.

[0055] To do this, see Figure 6-Figure 10 , the heat dissipation assembly 301 also includes a mounting groove 33, a conical wind shielding ring 39 and a threaded connection sleeve 40;

[0056] The heat dissipation channel 31 is opened inside the rotor 14, the intake channel 32 is opened inside the motor shaft 12, the mounting groove 33 is opened at one end of the motor shaft 12 and communicates with the intake channel 32, the threaded connection sleeve 40 is fixedly connected to the dustproof net 35, the conical wind shielding ring 39 is fixedly connected to the outer wall of the protective net 20, and the heat dissipation channel 31 is S-shaped;

[0057] The heat dissipation assembly 301 is used to realize air cooling of the rotor 14. When the magnetic suspension motor is working, the motor shaft 12 drives the guide fan 21 to rotate at a high speed. Since the guide fan 21 is located between the rear end cover 18 and the protective net 20, a negative pressure is formed at the position of the exhaust hole 22.

[0058] At this time, the external air flows into the motor shaft 12 through the intake duct 32, and then flows into the heat dissipation channel 31 from the motor shaft 12. Since the heat dissipation channel 31 is S-shaped, the air can fully absorb the heat in the rotor 14. Then the air flows into the interior of the casing 17, flows from the gap between the rotor 14 and the stator core 16, and is discharged from the exhaust hole 22. During the flow, the air can take away the heat inside the rotor 14, thereby achieving efficient heat dissipation of the rotor 14.

[0059] In the second embodiment, specifically: the heat dissipation channel 31 is connected to the intake channel 32, the threaded connection sleeve 40 is threadedly connected to the inner wall of the mounting groove 33, the dust screen 35 is in the form of a sheet, one end of the heat dissipation channel 31 extends inward from the inner wall of the rotor 14 and penetrates from the far end of the rotor 14, and the air entering the heat dissipation channel 31 can be filtered through the dust screen 35 to prevent dust from entering the interior of the motor;

[0060] The dustproof net 35 is installed inside the installation groove 33 in a threaded connection manner. When the dustproof net 35 needs to be cleaned, the threaded connection sleeve 40 can be rotated to remove the dustproof net 35 so as to clean the dustproof net 35.

[0061] In the second embodiment, specifically: the rotor 14 is located inside the stator core 16 , and a mounting bracket 23 is fixedly connected to the lower side of the housing 17 , so that the motor can be easily installed through the mounting bracket 23 .

[0062] During operation, the motor shaft 12 drives the guide fan 21 to rotate at high speed, and the external air flows into the heat dissipation channel 31 through the inlet flow channel 32. Since the heat dissipation channel 31 is S-shaped, the air can fully absorb the heat in the rotor 14, and then the air flows into the interior of the casing 17, flows from the gap between the rotor 14 and the stator core 16, and is discharged from the exhaust hole 22. During the flow process, the air can take away the heat inside the rotor 14, thereby realizing efficient heat dissipation of the rotor 14.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetically suspended high-speed motor based on a centrifugal air-cooling structure, characterized in that: The main body assembly (101) comprises a front end cover (11), a motor shaft (12), two magnetic bearings (13), a rotor (14), a stator core (16), a housing (17), a rear end cover (18), a protective cover (19), and a guide fan (21); The rotor (14) is mounted on the outer wall of the motor shaft (12); the motor shaft (12) is coaxially rotatably connected to the front cover (11) and the rear cover (18) through two magnetic suspension bearings (13); the front cover (11) and the rear cover (18) are symmetrically mounted on two ends of the casing (17); the protective cover (19) is coaxially fixedly connected to one side of the rear cover (18); the stator core (16) is mounted inside the casing (17); the guide fan (21) is fixedly connected to the outer wall of the motor shaft (12); and a plurality of exhaust holes (22) are evenly provided on the rear cover (18); A heat dissipation component (301) is arranged inside the main body component (101); The heat dissipation assembly (301) comprises a heat dissipation channel (31), an intake channel (32), a limiting ring (34), a dustproof net (35), a spring (37) and a limiting groove (38); The heat dissipation channel (31) is evenly opened inside the stator core (16), the intake channel (32) is evenly opened on the outer wall of the housing (17), the limiting ring (34) is fixedly connected to the outer wall of the housing (17), the limiting groove (38) is opened inside the other side of the rear end cover (18), one side of the dustproof net (35) is inserted into the inside of the limiting ring (34), and the other side of the dustproof net (35) is slidably connected to the inner wall of the limiting groove (38), and the spring (37) is located inside the limiting groove (38).

2. According to claim 1, a magnetic levitation high-speed motor based on a centrifugal air-cooling structure is characterized in that: A top ring (36) is slidably connected inside the limiting groove (38), a stator winding (15) is wound inside the stator core (16), a protective net (20) is coaxially fixedly mounted on the inner wall of the protective cover (19), and the guide fan (21) is located inside the protective cover (19).

3. The magnetic levitation high-speed motor based on a centrifugal air-cooling structure according to claim 2 is characterized in that: One end of the spring (37) is fixedly connected to the inner wall of the limiting groove (38), and the other end of the spring (37) is fixedly connected to one side of the top ring (36).

4. The magnetic levitation high-speed motor based on a centrifugal air-cooling structure according to claim 3 is characterized in that: The other side of the top ring (36) presses against the side of the dustproof net (35) away from the limiting ring (34); the dustproof net (35) is annular and sleeved on the outer side wall of the housing (17).

5. The magnetic levitation high-speed motor based on a centrifugal air-cooling structure according to claim 3 is characterized in that: The heat dissipation channel (31) is in communication with the intake channel (32), and one end of the heat dissipation channel (31) extends inward from one side of the stator core (16) and penetrates through the outer wall of the stator core (16).

6. The magnetic levitation high-speed motor based on a centrifugal air-cooling structure according to claim 4 is characterized in that: The dustproof net (35) is sleeved on the outside of the inlet air duct (32).

7. The magnetic levitation high-speed motor based on a centrifugal air-cooling structure according to claim 1 is characterized in that: The heat dissipation assembly (301) further comprises a mounting groove (33), a conical wind shielding ring (39) and a threaded connection sleeve (40); The heat dissipation channel (31) is opened inside the rotor (14), the intake channel (32) is opened inside the motor shaft (12), the mounting groove (33) is opened at one end of the motor shaft (12) and communicates with the intake channel (32), the threaded connection sleeve (40) is fixedly connected to the dustproof net (35), the conical wind shielding ring (39) is fixedly connected to the outer wall of the protective net (20), and the heat dissipation channel (31) is S-shaped.

8. The magnetic levitation high-speed motor based on a centrifugal air-cooling structure according to claim 7 is characterized in that: The heat dissipation channel (31) is in communication with the intake channel (32), the threaded connection sleeve (40) is threadedly connected to the inner wall of the mounting groove (33), the dust screen (35) is sheet-shaped, and one end of the heat dissipation channel (31) extends inward from the inner wall of the rotor (14) and penetrates from the far end of the rotor (14).

9. The magnetic levitation high-speed motor based on a centrifugal air-cooling structure according to claim 1 is characterized in that: The guide fan (21) is located between the rear end cover (18) and the protection net (20).

10. The magnetic levitation high-speed motor based on a centrifugal air-cooling structure according to claim 1, characterized in that: The rotor (14) is located inside the stator core (16), and a mounting frame (23) is fixedly connected to the lower side of the casing (17).

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