A motor

Abstract

The present invention provides a motor, comprising a magnetic part for mounting a magnetic component and two supporting parts distributed at both ends of the magnetic part. The interior of the magnetic part is hollow and the magnetic part is provided with a plurality of vents at both ends of the magnetic component. The plurality of vents are connected to the interior of the magnetic part. The rotor of the present invention is applied to the motor. By applying pressure, the airflow can enter the interior of the magnetic part through the vent at one end of the magnetic part and flow out from the vent at the other end of the magnetic part. When the air passes through the interior of the magnetic part, the heat inside the magnetic part can be dissipated, and then the heat of the entire magnetic part can be dissipated. This makes it possible for the airflow to dissipate heat to the rotor without passing through the air gap between the stator and the rotor. Further, the air gap between the stator and the rotor can be extremely small. While ensuring the heat dissipation effect, the resistance to the rotation of the rotor is also reduced. A smaller air gap also enables the magnetic field generated by the stator to reach the rotor better, thereby avoiding waste of the magnetic field.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic levitation motors, and in particular to a motor. Background Art

[0002] The magnetic levitation motor uses magnetic bearings to suspend the rotor. There is no need for traditional bearings to support the rotor. This reduces the friction of the traditional bearings themselves, making the motor's performance even better. In addition to stator excitation, the magnetic bearings are also equipped with excitation coils, which causes the magnetic levitation motor to generate more heat. The cooling system of traditional motors cannot meet the heat dissipation requirements of magnetic levitation motors very well. There is an air gap between the stator and rotor of the magnetic levitation motor, which allows the stator and rotor to rotate smoothly relative to each other. The air gap between the stator and the rotor can also form a channel for the airflow, allowing the circulating airflow to dissipate heat from the rotor.

[0003] However, the speed of the magnetic levitation motor is very high, which causes the rotor to rub against the airflow in the air gap during rotation, thereby generating a large amount of heat. The smaller the air gap between the two, the more difficult it is for the air to circulate, making it difficult for the motor to dissipate heat. In addition, the larger the air gap between the stator and the rotor, the more air there is, which reduces the efficiency of the motor. It can be seen that a small air gap is beneficial to improving the efficiency of the motor, but is not conducive to the heat dissipation of the motor. Therefore, it is necessary to improve the structure of the magnetic levitation motor, so as to improve its heat dissipation effect while ensuring that the motor has a small rotation resistance. Summary of the invention

[0004] The object of the present invention is to provide a motor which can form an air duct inside a rotor to dissipate heat from the rotor.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A motor rotor comprises a magnetic part for mounting a magnetic component and two supporting parts distributed at both ends of the magnetic part; the magnetic part is hollow inside and is provided with a plurality of vents at both ends of the magnetic component; the plurality of vents are connected to the interior of the magnetic part.

[0007] Furthermore, both ends of the magnetic part and the support part are provided with connecting flanges, so that the two support parts are connected to the two ends of the magnetic part through the connecting flanges.

[0008] Furthermore, the magnetic part is tubular; the end surface of the support part has a plurality of grooves radially distributed around its center, so that when the support part is attached to the end surface of the magnetic part, the grooves are connected to the interior of the magnetic part.

[0009] Furthermore, the end surfaces of the two support parts are respectively provided with a positioning rod and a positioning tube, so that when the two support parts are connected to the two ends of the magnetic part, the positioning rod is inserted into the inside of the positioning tube.

[0010] Furthermore, the end faces of the support part are protrudingly provided with positioning rings; both ends of the magnetic part are provided with positioning grooves cooperating with the positioning rings, so that when the support part is connected to the magnetic part, the positioning rings are inserted into the positioning grooves.

[0011] A motor comprises a motor body and the above-mentioned rotor; the interior of the positioning rod is hollow; the support part is provided with a plurality of reflow holes on its surface facing inward, so that the reflow holes are connected to the interior of the positioning tube or the interior of the positioning rod; the outer wall of the support part is provided with a plurality of blades along its circumference; and the plurality of blades are located between the vent holes and the reflow holes.

[0012] Furthermore, a separation ring is protruding from the inner wall of the motor housing; the separation ring is located between the blades and the return hole; and the housing is provided with air nozzles on both sides of the separation ring.

[0013] Furthermore, the blade is provided with a rotating shaft and is rotatably connected to the support portion via the rotating shaft; the rotating shaft is eccentrically arranged on one side of the blade so that the distances between the rotating shaft and two sides of the blade are unequal.

[0014] Furthermore, the side of the blade with a longer distance from the rotating shaft is arranged close to the vent hole; the support portion is cooperated with the blade to set a limiting portion so that the angle between the swing limit position of the blade on both sides and the length direction of the rotor is 60 degrees.

[0015] Furthermore, the air nozzle is provided with a filter element.

[0016] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0017] The rotor of the present invention is applied to a motor. By applying pressure, the air flow can enter the interior of the magnetic part through the vent hole at one end of the magnetic part, and flow out from the vent hole at the other end of the magnetic part. When the air passes through the interior of the magnetic part, the heat inside the magnetic part can be dissipated, and then the heat of the entire magnetic part can be dissipated. This makes it possible for the air flow to dissipate heat from the rotor without passing through the air gap between the stator and the rotor. Further, the air gap between the stator and the rotor can be extremely small. While ensuring the heat dissipation effect, the resistance to the rotation of the rotor is also reduced. A smaller air gap also allows the magnetic field generated by the stator to better reach the rotor, thereby avoiding waste of the magnetic field. In addition, the blades can deflect under wind resistance, so that the angle of the blades always corresponds to the rotation direction of the rotor, so that the wind direction generated by the blades is fixed, thereby better dissipating heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a cross-sectional view of the rotor along the flange hole;

[0020] Figure 2 is a cross-sectional view of the rotor along the vent hole;

[0021] Figure 3 is a schematic diagram of the motor;

[0022] Figure 4 for Figure 3 Enlarged view of point a in the middle.

[0023] Icons: 1-magnetic part, 2-magnetic part, 3-support part, 4-vent, 5-connecting flange, 6-positioning rod, 7-positioning tube, 8-positioning ring, 9-return hole, 10-blade, 11-separation ring, 12-air nozzle, 13-rotating shaft, 14-housing, 15-magnetic bearing, 16-stator. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Example:

[0026] like Figure 1-4 As shown, the present invention provides a rotor, including a magnetic part 2 for mounting a magnetic part 1 and two supporting parts 3 distributed at both ends of the magnetic part 2. The magnetic part 1 is a silicon steel sheet. It is wrapped around the outside of the magnetic part 2, and a permanent magnet can be formed by magnetizing it. In other words, the magnetic part 2 is used to mount a permanent magnet. The inside of the magnetic part 2 is hollow, and the magnetic part 2 is provided with a plurality of air vents 4 at both ends of the magnetic part 1. The plurality of air vents 4 are connected to the inside of the magnetic part 2. The number of connecting holes can be set as needed. The plurality of connecting holes are evenly distributed radially around the magnetic part 2. The supporting parts 3 at both ends of the magnetic part 2 can be connected to the bearings, thereby supporting the entire rotor and ensuring the stable operation of the rotor.

[0027] The rotor of the present invention is applied to a motor. The motor may be a conventional motor or a magnetic levitation motor. By applying pressure, the airflow can enter the interior of the magnetic part 2 through the vent 4 at one end of the magnetic part 2, and flow out from the vent 4 at the other end of the magnetic part 2. When the air passes through the interior of the magnetic part 2, the heat inside the magnetic part 2 can be dissipated, and then the heat of the entire magnetic part 2 can be dissipated. This makes it possible for the airflow to dissipate heat from the rotor without passing through the air gap between the stator 16 and the rotor. Further, the air gap between the stator 16 and the rotor can be extremely small. While ensuring the heat dissipation effect, the resistance to the rotation of the rotor is also reduced. A smaller air gap also allows the magnetic field generated by the stator 16 to reach the rotor better, thereby avoiding waste of the magnetic field.

[0028] In this embodiment, both ends of the magnetic part 2 and the support part 3 are provided with connecting flanges 5, so that the two support parts 3 are connected to the two ends of the magnetic part 2 through the connecting flanges 5. Specifically, the magnetic part 2 is tubular. This arrangement allows the entire rotor to be divided into a magnetic part 2 and two support parts 3. The entire rotor is divided and processed separately, and finally combined to form a rotor. This makes the processing of the rotor more convenient.

[0029] In this embodiment, the end surface of the support part 3 connected to the magnetic part 2 has a plurality of grooves radially distributed around its center, so that when the support part 3 is attached to the end surface of the magnetic part 2, the grooves are connected to the inside of the magnetic part 2. That is to say, when the support part 3 is connected to the magnetic part 2, the grooves of the support part 3 and the end surface of the magnetic part 2 can form the vent 4. This structure makes the structure of the entire support part 3 simpler and more convenient to process.

[0030] In this embodiment, the end faces of the two support parts 3 are respectively provided with a positioning rod 6 and a positioning tube 7. The inner diameter of the positioning tube 7 is equivalent to the outer diameter of the positioning rod 6, so that the positioning rod 6 can be easily inserted into the positioning tube 7, and the positioning tube 7 and the positioning rod 6 cannot shake too much relative to each other. We can also set the cooperation between the positioning tube 7 and the positioning rod 6 to an interference fit. When the two support parts 3 are connected to the two ends of the magnetic part 2, the positioning rod 6 is inserted into the inside of the positioning tube 7.

[0031] The cooperation of the positioning tube 7 and the positioning rod 6 makes the two support parts 3 become a whole, rather than just connecting the two as a whole through the magnetic part 2. This makes the connection between the two support parts 3 more stable and reliable, and the stability of the entire rotor more reliable. If the connection is only made through the connecting flange 5 between the support part 3 and the magnetic part 2, due to the gap between the connecting bolts and the hole wall of the flange hole, the support part 3 and the magnetic part 2 may have a slight shake along the radial direction of the rotor during the rotation of the rotor. By the cooperation of the positioning rod 6 and the positioning tube 7, radial shaking can be avoided. At the same time, by the cooperation of the positioning tube 7 and the positioning rod 6, the two support parts 3 can also be positioned so that the concentricity of the entire rotor is better. In order to better ensure the stability of the rotor, the axis center lines of the positioning tube 7 and the positioning rod 6 are both in line with the axis center line of the rotor.

[0032] In this embodiment, the end faces of the support portion 3 are protrudingly provided with positioning rings 8. Both ends of the magnetic portion 2 are provided with positioning grooves in cooperation with the positioning rings 8, so that when the support portion 3 is connected to the magnetic portion 2, the positioning rings 8 are inserted into the positioning grooves. The centers of the positioning rings 8 and the positioning grooves are concentric with the circle of the magnetic portion 2. The relative position of the support portion 3 and the magnetic portion can be better guaranteed by positioning the positioning rings 8 and the positioning grooves, thereby better ensuring the assembly quality of the rotor.

[0033] The present invention also provides a motor, including a motor body and the above-mentioned rotor. In this embodiment, a magnetic levitation motor is taken as an example, and the motor body includes a housing 14, a stator 16 and a magnetic levitation bearing 15. The interior of the positioning rod 6 is hollow, so that when the positioning rod 6 is inserted into the positioning tube 7, the interior of the two is combined into a channel. The support part 3 is provided with a plurality of reflux holes 9 on its surface, so that the reflux holes 9 are connected to the interior of the positioning tube 7 or the interior of the positioning rod 6. Figure 3 As shown, the return hole 9 cooperates with the support rod and the inside of the support rod to form another airflow channel. The outer wall of the support portion 3 is provided with a plurality of blades 10 along its circumference. The plurality of blades 10 are located between the vent hole 4 and the return hole 9. When the rotor rotates, the blades 10 rotate with the rotor, thereby forming an air pressure difference. The airflow then flows inside the magnetic portion 2 and inside the positioning tube 7, thereby forming an air circulation path, which makes the heat dissipation effect better. When the motor rotates forward or reverse, the airflow direction is different.

[0034] In this embodiment, a separator ring 11 is protruding from the inner wall of the housing 14 of the motor. The separator ring 11 extends from the inner wall of the housing 14 to the outer wall of the rotor, and a gap is left between the separator ring 11 and the outer wall of the rotor. This allows the separator ring 11 to be divided into two chambers on both sides. The separator ring 11 is located between the blade 10 and the return hole 9. The housing 14 is provided with air nozzles 12 on both sides of the separator ring 11.

[0035] When the rotor rotates, the blades 10 rotate with it and form an air pressure difference. The airflow enters the housing 14 through one of the air nozzles 12, flows along the inside of the magnetic part 2 and the inside of the positioning tube 7, and finally flows out through the other air nozzle 12. Thus, the airflow can flow normally between the inside and outside of the motor. Thus, the heat dissipation effect is effectively guaranteed. In order to prevent impurities in the air from entering the inside of the motor, the air nozzle 12 is provided with a filter element.

[0036] In this embodiment, the blade 10 is provided with a rotating shaft 13 and is rotatably connected to the support part 3 through the rotating shaft 13. The rotating shaft 13 is eccentrically arranged on one side of the blade 10 so that the distance between the rotating shaft 13 and the two sides of the blade 10 is unequal. When the blade 10 rotates, the thrust of the airflow on the blade 10 and the two sides of the rotating shaft 13 is unequal, so that the blade 10 deflects under the action of the airflow. When the motor rotates, the blade 10 deflects under the action of inertia. Then the blade 10 rotates and contacts with the air, so that the air pushes the blade 10 and keeps the blade 10 in a state inclined to the axial direction of the rotor. When the motor rotates in the other direction, the blade 10 will immediately deflect in the other direction under the action of inertia, and also keep the inclined state under the action of the air. This allows the angle of the blade 10 to change with the rotation direction of the motor. The inclination of the blade 10 makes the rotation of the blade 10 push the airflow in one direction. As long as we ensure that the pushing direction of the airflow is the same as the required airflow flow direction.

[0037] This setting can ensure that the direction of the airflow is always the required direction when the motor is rotating forward or reverse.

[0038] like Figure 4 As shown, the side of the blade 10 with a longer distance from the rotating shaft 13 is arranged close to the vent 4. Combined with the above analysis of the rotation of the blade 10, it can be known that the direction of the airflow pushed by the blade 10 when the blade 10 rotates with the rotor is always directed to the vent 4. The support portion 3 is provided with a limit portion in cooperation with the blade 10 so that the angle between the swing limit position of the blade 10 on both sides and the length direction of the rotor is 60 degrees. In other words, the blade 10 will not be able to continue to deflect after deflecting 60 degrees, which means that after the rotor rotation speed reaches a certain level, the rotor rotation speed continues to accelerate and the blade 10 always remains in a state of extreme inclination of 60 degrees. This prevents the blade 10 from swinging to a direction perpendicular to the length of the rotor and losing its driving effect on the airflow.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A motor, characterized in that: The invention comprises a motor body and a rotor; the rotor comprises a magnetic part (2) on which a magnetic part (1) is mounted and two supporting parts (3) distributed at both ends of the magnetic part (2); the magnetic part (2) is hollow inside and the magnetic part (2) is provided with a plurality of vent holes (4) at both ends of the magnetic part (1); the plurality of vent holes (4) are connected to the inside of the magnetic part (2); The outer wall of the support portion (3) is provided with a plurality of blades (10) along its circumference; the blade (10) is provided with a rotating shaft (13) and is rotatably connected to the support portion (3) via the rotating shaft (13); the rotating shaft (13) is eccentrically arranged on one side of the blade (10) so that the distances between the rotating shaft (13) and the two sides of the blade (10) are unequal; the side of the blade (10) with a longer distance from the rotating shaft (13) is arranged close to the vent hole (4); the support portion (3) is provided with a limiting portion in cooperation with the blade (10) so that the angle between the swing limit position of the blade (10) to both sides and the length direction of the rotor is 60 degrees; Both ends of the magnetic part (2) and the support part (3) are provided with connecting flanges (5), so that the two support parts (3) are connected to the two ends of the magnetic part (2) through the connecting flanges (5); The end surfaces of the two support parts (3) are respectively provided with positioning rods (6) and positioning tubes (7), so that when the two support parts (3) are connected to the two ends of the magnetic part (2), the positioning rods (6) are inserted into the positioning tubes (7).

2. The motor according to claim 1, characterized in that: The magnetic part (2) is tubular; the end surface of the support part (3) is provided with a plurality of grooves radially distributed around its center, so that when the support part (3) is attached to the end surface of the magnetic part (2), the grooves are connected to the interior of the magnetic part (2).

3. The motor according to claim 2, characterized in that: The end faces of the support portion (3) are both protrudingly provided with positioning rings (8); both ends of the magnetic portion (2) are both provided with positioning grooves that cooperate with the positioning rings (8), so that when the support portion (3) is connected to the magnetic portion (2), the positioning rings (8) are inserted into the positioning grooves.

4. The motor according to claim 3, characterized in that: The interior of the positioning rod (6) is hollow; the support portion (3) is provided with a plurality of reflow holes (9) on its surface facing inward, so that the reflow holes (9) are connected to the interior of the positioning tube (7) or the interior of the positioning rod (6); and the plurality of blades (10) are located between the ventilation hole (4) and the reflow hole (9).

5. The motor according to claim 4, characterized in that: A separation ring (11) is protruding from the inner wall of the motor housing (14); the separation ring (11) is located between the blade (10) and the return hole (9); and the housing (14) is provided with air nozzles (12) on both sides of the separation ring (11).

6. The motor according to claim 5, characterized in that: The air nozzle (12) is provided with a filter element.

Images