A magnetically suspended high-speed motor with air-cooling structure

Abstract

The present invention discloses a magnetic levitation high-speed motor with an air-cooling structure, and relates to the technical field of magnetic levitation high-speed motors, including a heat dissipation component, and relates to the technical field of magnetic levitation high-speed motors. The heat dissipation component includes a casing, a rotor core, two end covers, two magnetic levitation bearings, two heat dissipation seats, a heat dissipation slot, a guide vane, and an exhaust hole. When the present invention performs heat dissipation, a negative pressure is generated outside the exhaust hole. At this time, the external air flows into the air inlet slot, and then is discharged from the casing from the exhaust hole after a half-circulation in the casing. During the flow of air, heat dissipation of the motor shaft, the rotor core, the stator core, and the stator winding is achieved. Compared with the prior art, the present invention arranges air flow channels inside the motor shaft and the rotor core, so that the external air can enter the motor from both sides of the motor, and then be discharged from both sides respectively. In this process, no large pressure drop will be generated, and the heat dissipation is more sufficient, and the heat dissipation effect is better.

Description

Technical Field

[0001] The invention relates to a magnetic levitation high-speed motor, in particular to a magnetic levitation high-speed motor with an air-cooling structure, and belongs to the technical field of magnetic levitation high-speed motors. Background Art

[0002] The magnetic levitation motor is a high-speed motor that uses magnetic levitation bearings to make the rotor free of mechanical friction during operation, thereby effectively increasing the rotor speed. The magnetic levitation high-speed motor avoids the friction of traditional mechanical bearings, has low energy loss, high energy efficiency, and higher transmission efficiency than traditional motors. In order to dissipate the heat generated by its internal components in a timely manner when using a high-speed magnetic levitation motor, it is usually necessary to set corresponding heat dissipation components on the motor.

[0003] In the design of the existing magnetic levitation motor heat dissipation mechanism, cooling air is blown in from the magnetic bearing at one end, blown through the air gap between the stator and the rotor after passing through the magnetic bearing, and finally blown out through the magnetic bearing at the other end. Although this design can directly cool the magnetic bearings, rotor and stator at both ends, due to the relatively small ventilation gap of the magnetic bearing, the cooling air will encounter greater resistance when passing through, thereby generating a greater pressure drop. Moreover, since the cooling air needs to pass through the magnetic bearing twice, this further increases the pressure drop of the entire air cooling path. The increase in pressure drop will cause the flow rate of cooling air to decrease, thereby affecting the heat dissipation effect. Therefore, a magnetic levitation high-speed motor with an air cooling structure is proposed. Summary of the invention

[0004] The object of the present invention is to provide a magnetically suspended high-speed motor with an air-cooling structure to solve one of the problems raised in the above-mentioned background technology.

[0005] The present invention is implemented by the following technical scheme: a magnetic suspension high-speed motor with an air-cooling structure, comprising a heat dissipation component, wherein the heat dissipation component comprises a housing, a rotor core, two end covers, two magnetic suspension bearings, two heat dissipation seats, a heat dissipation slot, a motor shaft, an air inlet slot, an air inlet hole, a rotating frame, a guide vane and an exhaust hole;

[0006] The rotor core is installed on the outer wall of the motor shaft, and the two end covers are symmetrically installed at the two ends of the casing. The motor shaft is coaxially connected to the two end covers through two magnetic bearings. The two air inlet grooves are symmetrically opened at the two ends of the motor shaft, and the two air inlet grooves extend to the middle of the motor shaft and do not penetrate each other. The inner wall of the air inlet groove is evenly distributed with a number of air inlet holes penetrating to the outer wall of the motor shaft. The outer wall of the rotor core is evenly distributed with heat dissipation grooves connected to the air inlet holes one by one. One of the heat dissipation seats is fixedly connected to a side of an end cover away from the casing. The guide blades are evenly surrounded and fixedly connected to one side of the inner ring of the rotating frame, and the exhaust holes are evenly opened around the inner ring of the end cover.

[0007] As a further preferred embodiment of the technical solution: the rotating frame is rotatably connected to the inner wall of the heat sink, and the position of the heat sink corresponds to the position of the exhaust hole.

[0008] As a further preferred embodiment of the technical solution: a stator core is installed on the inner wall of the casing, a stator winding is wound inside the stator core, and the rotor core is located inside the stator core.

[0009] As a further preferred embodiment of the technical solution: the heat dissipation assembly further includes a mounting frame, a mounting seat, a friction plate, a friction ring, a sliding rod and a spring;

[0010] The mounting frame is fixedly connected to a side of the rotating frame away from the guide vane, the friction ring is fixedly connected to the inside of the mounting frame, the slide rod is slidably connected to the inner side of the mounting seat, the friction plate is located on the outer side of the mounting seat and fixedly connected to one end of the slide rod, and the spring is sleeved on the outer side wall of the slide rod.

[0011] As a further preferred embodiment of the technical solution: the mounting seat is fixedly connected to the outer side wall of the motor shaft, and the position of the friction plate corresponds to the position of the friction ring.

[0012] As a further preferred embodiment of the technical solution: one end of the spring presses against the end of the slide bar away from the friction plate, and the other end of the spring presses against the inner side of the mounting seat.

[0013] As a further preferred embodiment of the technical solution: a guide rod is slidably connected to the inner side of the mounting seat, and one end of the guide rod passes through the mounting seat and is fixedly connected to the friction plate.

[0014] As a further preferred embodiment of the technical solution: the mounting seat is located inside the heat sink, and a protective net is fixedly connected to a side of the heat sink away from the end cover.

[0015] As a further preferred embodiment of the technical solution: the interior of the air inlet groove is slidably connected to a limit socket, and one side of the limit socket is fixedly connected to a mounting plate.

[0016] As a further preferred embodiment of the technical solution: a dustproof net is installed in the middle of the mounting plate, and the mounting plate is fixedly connected to the motor shaft.

[0017] Advantages of the present invention:

[0018] 1. When the present invention performs heat dissipation, the guide blades rotate at high speed, thereby generating negative pressure outside the exhaust hole. At this time, the external air flows into the air inlet slot, then flows into the heat dissipation slot from the air inlet, flows into the casing from the heat dissipation slot, and finally is discharged from the casing from the exhaust hole after a half-circulation in the casing. During the flow of air, the heat dissipation of the motor shaft, the rotor core, the stator core and the stator winding is achieved. Compared with the prior art, the present invention arranges air flow channels inside the motor shaft and the rotor core, so that the external air can enter the motor from both sides of the motor and then be discharged from both sides respectively. In this process, no large pressure drop will be generated, and the heat dissipation is more sufficient and the heat dissipation effect is better;

[0019] 2. The present invention supplies power to the stator winding on the stator core, thereby driving the motor rotor to rotate. The motor shaft rotates at high speed through the magnetic bearing. The motor shaft drives the mounting seat, and the mounting seat drives the friction plate to rotate at high speed. Under the action of centrifugal force, the friction plate moves away from the motor shaft and fits with the friction ring. After the friction plate contacts the friction ring, it drives the friction ring to rotate. The friction ring drives the mounting frame, the mounting frame drives the rotating frame, and the rotating frame drives the guide vanes, thereby making the guide vanes rotate at high speed. The air-cooling heat dissipation of the present invention can be adjusted according to the actual operating state of the motor, avoiding the heat dissipation problem caused by improper human operation or negligence, and improving the stability and reliability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 This is a structural schematic diagram of a magnetic levitation high-speed motor with an air-cooling structure according to the present invention;

[0022] Figure 2 It is a schematic diagram of the structural decomposition of the present invention;

[0023] Figure 3 It is a schematic diagram of the rotor core structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the motor shaft structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the limit socket of the present invention;

[0026] Figure 6 It is a schematic diagram of the disassembly of the heat dissipation assembly of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the mounting seat of the present invention;

[0028] Figure 8 Schematic diagram of the air flow path of the present invention.

[0029] In the figure: 101, heat dissipation assembly; 11, casing; 12, stator core; 13, stator winding; 14, rotor core; 15, end cover; 16, magnetic bearing; 17, heat sink; 18, heat sink; 19, motor shaft; 20, air inlet slot; 21, air inlet hole; 22, mounting bracket; 23, rotating bracket; 24, guide vane; 25, mounting bracket; 26, protective net; 27, friction plate; 28, friction ring; 29, slide bar; 30, spring; 31, guide rod; 32, dust net; 33, limit socket; 34, exhaust hole; 35, mounting plate. DETAILED DESCRIPTION

[0030] 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.

[0031] Example

[0032] See also Figure 1-Figure 8 The present invention provides a technical solution: a magnetic suspension high-speed motor with an air-cooling structure, comprising a heat dissipation component 101, the heat dissipation component 101 comprising a housing 11, a rotor core 14, two end covers 15, two magnetic suspension bearings 16, two heat dissipation seats 17, a heat dissipation slot 18, a motor shaft 19, an air inlet slot 20, an air inlet hole 21, a rotating frame 23, a guide vane 24 and an exhaust hole 34;

[0033] The rotor core 14 is mounted on the outer side wall of the motor shaft 19, and two end covers 15 are symmetrically mounted on both ends of the housing 11. The motor shaft 19 is coaxially rotatably connected to the two end covers 15 through two magnetic bearings 16. The stator core 12 is mounted on the inner side wall of the housing 11, and the stator winding 13 is wound inside the stator core 12. The rotor core 14 is located inside the stator core 12.

[0034] When the magnetic suspension high-speed motor is working, the stator winding 13 on the stator core 12 is powered, the motor stator generates a magnetic field in a fixed direction, and then drives the motor rotor to rotate, the rotor core 14 drives the motor shaft 19, and the motor shaft 19 rotates through the magnetic suspension bearing 16. The magnetic suspension bearing 16 can prevent the motor shaft 19 from generating mechanical friction when rotating, thereby effectively increasing the speed of the motor shaft 19. Since the magnetic suspension high-speed motor avoids the friction of traditional mechanical bearings, the efficiency is greatly improved;

[0035] Two air inlet grooves 20 are symmetrically arranged at both ends of the motor shaft 19, and the two air inlet grooves 20 extend toward the middle of the motor shaft 19 and do not penetrate each other. The inner wall of the air inlet groove 20 is evenly distributed with a plurality of air inlet holes 21 penetrating to the outer wall of the motor shaft 19, and the outer wall of the rotor core 14 is evenly distributed with heat dissipation grooves 18 connected one by one with the air inlet holes 21. A heat dissipation seat 17 is fixedly connected to a side of an end cover 15 away from the housing 11, and the guide vanes 24 are evenly surrounded and fixedly connected to one side of the inner ring of the rotating frame 23, and the exhaust holes 34 are evenly arranged around the inner ring of the end cover 15;

[0036] The heat dissipation component 101 is used to achieve heat dissipation of the magnetic suspension high-speed motor, including heat dissipation of the motor shaft 19, the rotor core 14, the stator core 12 and the stator winding 13;

[0037] When performing heat dissipation operation, the guide vane 24 rotates at high speed, thereby generating negative pressure outside the exhaust hole 34. At this time, external air flows into the air inlet groove 20, then flows into the heat dissipation groove 18 from the air inlet hole 21, flows into the casing 11 from the heat dissipation groove 18, and finally is discharged from the casing 11 from the exhaust hole 34 after half a cycle in the casing 11. During the flow of air, heat is dissipated for the motor shaft 19, the rotor core 14, the stator core 12 and the stator winding 13. Compared with the prior art, the present invention arranges air flow channels inside the motor shaft 19 and the rotor core 14, so that external air can enter the motor from both sides of the motor and then be discharged from both sides respectively. In this process, no large pressure drop will be generated, and the heat dissipation is more sufficient and the heat dissipation effect is better.

[0038] In the present embodiment, specifically: the rotating frame 23 is rotatably connected to the inner wall of the heat sink 17, the position of the heat sink 17 corresponds to the position of the exhaust hole 34, and the exhaust hole 34 is located inside the heat sink 17. When the rotating frame 23 drives the guide blade 24 to work, the interior of the heat sink 17 is under negative pressure, and the air in the casing 11 flows out to the outside. Combined with the air inlet groove 20, the air inlet hole 21 and the heat sink 18, the air can be circulated to achieve air cooling and heat dissipation of the motor.

[0039] In this embodiment, specifically: the heat dissipation assembly 101 further includes a mounting frame 22, a mounting seat 25, a friction plate 27, a friction ring 28, a slide bar 29 and a spring 30;

[0040] The mounting frame 22 is fixedly connected to a side of the rotating frame 23 away from the guide vane 24, the friction ring 28 is fixedly connected to the inside of the mounting frame 22, the slide bar 29 is slidably connected to the inner side of the mounting seat 25, the friction plate 27 is located on the outer side of the mounting seat 25 and fixedly connected to one end of the slide bar 29, and the spring 30 is sleeved on the outer side wall of the slide bar 29;

[0041] When the motor shaft 19 rotates, it drives the mounting seat 25, and the mounting seat 25 drives the friction plate 27. After the friction plate 27 contacts the friction ring 28, it drives the friction ring 28 to rotate. The friction ring 28 drives the mounting frame 22, the mounting frame 22 drives the rotating frame 23, and the rotating frame 23 drives the guide vane 24, thereby realizing the air cooling and heat dissipation action of the motor.

[0042] In this embodiment, specifically: the mounting seat 25 is fixedly connected to the outer wall of the motor shaft 19, the position of the friction plate 27 corresponds to the position of the friction ring 28, and the shape of the friction plate 27 is adapted to the shape of the friction ring 28;

[0043] The friction plate 27 is annular in shape, and the outer wall of the friction plate 27 can be completely fitted with the inner wall of the friction ring 28, thereby increasing the friction force and enhancing the stability of the rotating frame 23 during operation.

[0044] In this embodiment, specifically: one end of the spring 30 presses against the end of the slide bar 29 away from the friction plate 27, and the other end of the spring 30 presses against the inner side of the mounting seat 25;

[0045] When the magnetic suspension high-speed motor is in a low-speed state, the slide bar 29 is pushed by the spring 30, and the slide bar 29 drives the friction plate 27, so that the friction plate 27 can be kept away from the friction ring 28;

[0046] When the motor runs at a low speed, the heat generated is relatively small. If the air cooling structure is turned on, it will not only waste energy, but also cause adverse effects on the motor due to overcooling.

[0047] When the magnetic levitation high-speed motor is in high-speed state, the mounting seat 25 drives the friction plate 27 to rotate at high speed. Under the action of centrifugal force, the friction plate 27 moves away from the motor shaft 19 and fits with the friction ring 28, so that air cooling of the magnetic levitation high-speed motor can be achieved.

[0048] In this embodiment, specifically: a guide rod 31 is slidably connected to the inner side of the mounting seat 25, one end of the guide rod 31 passes through the mounting seat 25 and is fixedly connected to the friction plate 27, and the position of the friction plate 27 can be limited by the guide rod 31 so that the position of the friction plate 27 corresponds to the position of the friction ring 28.

[0049] In this embodiment, specifically: the mounting seat 25 is located inside the heat sink 17, and a protective net 26 is fixedly connected to the side of the heat sink 17 away from the end cover 15. The protective net 26 can play a protective role to avoid accidentally touching the high-speed rotating guide blades 24.

[0050] In the present embodiment, specifically: the air inlet groove 20 is internally slidably connected to a limit socket 33, a mounting plate 35 is fixedly connected to one side of the limit socket 33, a dustproof net 32 ​​is installed in the middle of the mounting plate 35, the mounting plate 35 is fixedly connected to the motor shaft 19, the air entering the casing 11 can be filtered through the dustproof net 32, and by disassembling the mounting plate 35, the dustproof net 32 ​​can be removed so as to clean the dustproof net 32.

[0051] Working principle or structural principle, when in use, the stator winding 13 on the stator core 12 is powered, the motor stator generates a magnetic field in a fixed direction, and then drives the motor rotor to rotate, the rotor core 14 drives the motor shaft 19, the motor shaft 19 rotates at high speed through the magnetic suspension bearing 16, the motor shaft 19 drives the mounting seat 25, the mounting seat 25 drives the friction plate 27 to rotate at high speed, the friction plate 27 moves away from the motor shaft 19 under the action of centrifugal force and fits with the friction ring 28, the friction plate 27 drives the friction ring 28 to rotate, and the friction ring 28 drives the mounting frame 22, the mounting frame 22 drives the rotating frame 23, the rotating frame 23 drives the guide blades 24, the guide blades 24 rotate at a high speed, and the interior of the heat sink 17 is under negative pressure. At this time, the external air flows into the air inlet groove 20, and then flows into the heat sink 18 from the air inlet hole 21, and flows into the housing 11 from the heat sink 18, and finally is discharged from the housing 11 from the exhaust hole 34 after a half-circulation in the housing 11. During the flow of air, the heat dissipation of the motor shaft 19, the rotor core 14, the stator core 12 and the stator winding 13 is achieved.

[0052] 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 with an air-cooling structure, characterized in that: The heat dissipation assembly (101) comprises a housing (11), a rotor core (14), two end covers (15), two magnetic suspension bearings (16), two heat dissipation seats (17), a heat dissipation slot (18), a motor shaft (19), an air inlet slot (20), an air inlet hole (21), a rotating frame (23), a guide vane (24) and an exhaust hole (34); The rotor core (14) is mounted on the outer side wall of the motor shaft (19); the two end covers (15) are symmetrically mounted on the two ends of the housing (11); the motor shaft (19) is coaxially rotatably connected to the two end covers (15) via two magnetic bearings (16); the two air inlet grooves (20) are symmetrically arranged at the two ends of the motor shaft (19); the two air inlet grooves (20) extend toward the middle of the motor shaft (19) and do not interpenetrate each other; The outer wall of the motor shaft (19) is evenly distributed with a plurality of air inlet holes (21) extending through the outer wall of the motor shaft (19); the outer wall of the rotor core (14) is evenly distributed with heat dissipation slots (18) connected one by one with the air inlet holes (21); a heat dissipation seat (17) is fixedly connected to a side of an end cover (15) away from the housing (11); the guide vanes (24) are evenly arranged around and fixedly connected to one side of the inner ring of the rotating frame (23); and the exhaust holes (34) are evenly arranged around the inner ring of the end cover (15); The heat dissipation assembly (101) further comprises a mounting frame (22), a mounting seat (25), a friction plate (27), a friction ring (28), a sliding rod (29) and a spring (30); The mounting frame (22) is fixedly connected to a side of the rotating frame (23) away from the guide vane (24), the friction ring (28) is fixedly connected to the inside of the mounting frame (22), the slide bar (29) is slidably connected to the inner side of the mounting seat (25), the friction plate (27) is located on the outer side of the mounting seat (25) and is fixedly connected to one end of the slide bar (29), and the spring (30) is sleeved on the outer side wall of the slide bar (29); The mounting seat (25) is fixedly connected to the outer wall of the motor shaft (19), and the position of the friction plate (27) corresponds to the position of the friction ring (28); one end of the spring (30) presses against the end of the slide rod (29) away from the friction plate (27), and the other end of the spring (30) presses against the inner side of the mounting seat (25); the inner side of the mounting seat (25) is slidably connected to a guide rod (31), and one end of the guide rod (31) passes through the mounting seat (25) and is fixedly connected to the friction plate (27); the mounting seat (25) is located inside the heat sink (17), and a protective net (26) is fixedly connected to the side of the heat sink (17) away from the end cover (15).

2. The magnetic levitation high-speed motor with an air-cooling structure according to claim 1 is characterized in that: The rotating frame (23) is rotatably connected to the inner wall of the heat dissipation seat (17), and the position of the heat dissipation seat (17) corresponds to the position of the exhaust hole (34).

3. The magnetic levitation high-speed motor with an air-cooling structure according to claim 1 is characterized in that: A stator core (12) is installed on the inner side wall of the casing (11), a stator winding (13) is wound inside the stator core (12), and the rotor core (14) is located inside the stator core (12).

4. The magnetic levitation high-speed motor with an air-cooling structure according to claim 1 is characterized in that: The air inlet groove (20) is internally slidably connected to a limit socket (33), and a mounting plate (35) is fixedly connected to one side of the limit socket (33).

5. The magnetic levitation high-speed motor with an air-cooling structure according to claim 4 is characterized in that: A dustproof net (32) is installed in the middle of the mounting plate (35), and the mounting plate (35) is fixedly connected to the motor shaft (19).

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