Magnetic suspension motor

Abstract

The utility model belongs to the technical field of magnetic suspension motors, and particularly relates to a magnetic suspension motor. The magnetic suspension motor can be in butt joint with an axial supporting device, the axial supporting device is used for axially supporting the magnetic suspension motor, the axial supporting device comprises a clamp, the magnetic suspension motor comprises a shell and a rotor, the rotor is rotatably arranged in the shell, and a part of the rotor is located in the shell. A containing space used for containing a stator winding is formed in the shell, the clamp can stretch into the shell and can be fixedly arranged outside the rotor in a sleeving mode, a gap is formed between the clamp and the shell, an air inlet cavity is formed in the shell, the air inlet cavity is located on one side of the containing space and communicated with the gap, and the air inlet cavity is provided with an air inlet. And the air inlet is used for introducing cooling air. Cooling gas can be introduced into the gap through the gas inlet, so that heat in the gap is taken away, the problem that the temperature in the gap between the clamp and the shell is high can be solved, and parts near the clamp are prevented from being damaged.

Description

Technical Field

[0001] The present application belongs to the technical field of magnetic levitation motors, and specifically relates to a magnetic levitation motor. Background Art

[0002] The magnetic levitation motor is a special motor in which the stator and rotor operate without contact. It uses magnetic force to make the rotor levitate and rotate. There is no contact and friction between the rotor and the stator. Compared with traditional motors, it has the advantages of energy saving and environmental protection because it has no mechanical contact.

[0003] When using a magnetic levitation motor, an axial support device is usually required to axially support the rotor. The axial support device includes a clamp that can extend into the magnetic levitation motor and can be fixedly sleeved outside the rotor, and the clamp can rotate with the rotor. Although the axial support device can stably support the rotor through the clamp, the inventor found that during the operation of the magnetic levitation motor, components near the clamp are easily damaged. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a magnetic levitation motor that can solve the problem that components near the clamp are easily damaged during the operation of the magnetic levitation motor.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] The embodiment of the present application provides a magnetic levitation motor, which can be docked with an axial support device, the axial support device is used to axially support the magnetic levitation motor, the axial support device includes a clamp, the magnetic levitation motor includes a housing and a rotor, the rotor is rotatably arranged in the housing, and a part of the rotor is located in the housing, and a receiving space for receiving a stator winding is formed in the housing.

[0007] The clamp can be extended into the shell and can be fixedly mounted on the outside of the rotor. There is a gap between the clamp and the shell. An air inlet cavity is formed on the shell. The air inlet cavity is located on one side of the accommodating space and is connected to the gap. The air inlet cavity has an air inlet port, which is used to introduce cooling gas.

[0008] In an embodiment of the present application, a accommodating space for accommodating a stator winding is formed in the shell. When the clamp of the axial support device extends into the shell and is fixedly mounted on the outside of the rotor, a gap is formed between the clamp and the shell, and an air intake cavity connected to the gap is formed on the shell. The air intake cavity is located on one side of the accommodating space. That is to say, the air intake cavity and the accommodating space are two different chambers, and the air intake cavity has an air inlet for introducing cooling gas. Since the air intake cavity is connected to the gap, the cooling gas entering the air intake cavity through the air inlet can enter the gap, thereby taking away the heat in the gap. This can solve the problem of high temperature in the gap between the clamp and the shell, thereby preventing components near the clamp from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram of the structure of the magnetic levitation motor disclosed in the embodiment of the present application;

[0010] Figure 2 An exploded schematic diagram of a magnetic levitation motor disclosed in an embodiment of the present application;

[0011] Figure 3 A cross-sectional view of the magnetic levitation motor disclosed in an embodiment of the present application;

[0012] Figure 4 This is a schematic diagram of the structure of the end plate disclosed in the embodiment of the present application.

[0013] Description of reference numerals:

[0014] 100, shell; 101, air inlet cavity; 110, shell body; 111, accommodating space; 120, air inlet ring; 121, second groove; 122, annular protrusion; 123, air inlet hole; 124, connecting hole; 1241, fixing section; 1242, ventilation section; 130, end plate; 131, first groove; 200, rotor; 210, permanent magnet; 300, fixture; 410, gap; 420, suspension space; 500, stator winding. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0016] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0017] The magnetic levitation motor provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0018] The inventors have found that when the clamp is inserted into the magnetic levitation motor and fixedly mounted outside the rotor, a gap will be formed between the clamp and the shell of the magnetic levitation motor. The gap is connected to the storage space in the shell for accommodating the stator winding. The stator winding will generate a lot of heat during operation. This part of the heat will enter the gap through the storage space, thereby increasing the temperature in the gap. In addition, the clamp will disturb the airflow in the gap as it rotates with the rotor, which will also generate heat in the gap and cause the temperature in the gap to rise. It can be seen that during the operation of the magnetic levitation motor, a lot of heat will accumulate in the above-mentioned gap, which will obviously cause the components near the clamp to be in a high temperature environment for a long time, which can easily cause damage to the components near the clamp.

[0019] like Figures 1 to 4 As shown, the embodiment of the present application discloses a magnetic levitation motor, which can be docked with an axial support device, the axial support device is used to axially support the magnetic levitation motor, the axial support device includes a clamp 300, and the magnetic levitation motor includes a housing 100 and a rotor 200, the rotor 200 is rotatably arranged in the housing 100, and a part of the rotor 200 is located in the housing 100, and a receiving space 111 for receiving the stator winding 500 is formed in the housing 100. Optionally, the magnetic levitation motor of the present application can be a magnetic levitation motor applied to a tool, in which case the rotor 200 can be connected to a tool such as a milling cutter.

[0020] The clamp 300 can extend into the housing 100 and can be fixedly mounted on the outside of the rotor 200. There is a gap 410 between the clamp 300 and the housing 100. An air inlet cavity 101 is formed on the housing 100. The air inlet cavity 101 is located on one side of the accommodating space 111 and is connected to the gap 410. The air inlet cavity 101 has an air inlet for introducing cooling gas. Specifically, after the clamp 300 is fixedly mounted on the outside of the rotor 200, it can rotate with the rotor 200. Since the axial support device and the clamp 300 thereof are both prior art, this application will not elaborate on the specific structure of the axial support device and the fixing structure between the clamp 300 and the rotor 200.

[0021] In the embodiment of the present application, a accommodating space 111 for accommodating the stator winding 500 is formed in the shell 100. When the clamp 300 of the axial support device extends into the shell 100 and is fixedly mounted on the outside of the rotor 200, a gap 410 is formed between the clamp 300 and the shell 100, and an air inlet cavity 101 connected to the gap 410 is formed on the shell 100. The air inlet cavity 101 is located on one side of the accommodating space 111. That is, the air inlet cavity 101 and the accommodating space 111 are two different chambers, and the air inlet cavity 101 has an air inlet for introducing cooling gas. Since the air inlet cavity 101 is connected to the gap 410, the cooling gas entering the air inlet cavity 101 through the air inlet can enter the gap 410, thereby taking away the heat in the gap 410. This can solve the problem of high temperature in the gap 410 between the clamp 300 and the shell 100, thereby preventing components near the clamp 300 from being damaged.

[0022] In an optional embodiment, the housing 100 includes a housing body 110, an intake ring 120 and an end plate 130, the end plate 130 can be connected to the axial support device, a housing space 111 is formed in the housing body 110, the intake ring 120 is detachably connected to one end of the housing body 110, the end plate 130 is detachably connected to one end of the intake ring 120 away from the housing body 110, the clamp 300 can pass through the end plate 130 and extend into the intake ring 120, that is, both the end plate 130 and the intake ring 120 have inner holes, the clamp 300 can pass through the inner hole of the end plate 130 and extend into the inner hole of the intake ring 120, the intake ring 120 and the end plate 130 cooperate to form an intake cavity 101, and a gap 410 is provided between the intake ring 120 and the clamp 300. Specifically, the end plate 130 can be connected to the axial support device by means of clamping, bolting, etc.

[0023] In the present embodiment, the shell 100 includes a shell body 110, an intake ring 120 and an end plate 130 which are separately arranged, and the shell body 110 and the intake ring 120 are detachably connected, and the end plate 130 and the intake ring 120 are detachably connected, and the intake cavity 101 is formed by the intake ring 120 and the end plate 130. Compared with the embodiment in which the intake cavity 101 is arranged in the shell 100 which is integrally formed, the intake cavity 101 is designed as two components, the intake ring 120 and the end plate 130, in the present embodiment, the intake cavity 101 is designed as two components, the intake ring 120 and the end plate 130, which can make the manufacturing process of the intake ring 120 and the end plate 130 simpler, thereby simplifying the manufacturing difficulty of the shell 100; in addition, if the intake structure of one of the intake ring 120 and the end plate 130 is damaged, it is only necessary to replace one of the intake ring 120 and the end plate 130 in a targeted manner, without replacing the shell 100 as a whole, thereby reducing the maintenance cost.

[0024] Optionally, the shell body 110 and the air intake ring 120 , and the air intake ring 120 and the end plate 130 may be detachably connected by means of snap connection or bolt connection, and the present application does not impose any restrictions on this.

[0025] In an optional embodiment, one of the intake ring 120 and the end plate 130 is provided with a first groove 131, and the first groove 131 is arranged around the inner hole of the intake ring 120 or the inner hole of the end plate 130, that is, the first groove 131 is arranged around the inner hole of the intake ring 120 and the end plate 130 provided with the first groove 131, and the first groove 131 extends to the inner hole of the intake ring 120 or the inner hole of the end plate 130, the intake cavity 101 includes the first groove 131, and the intake cavity 101 is connected with the gap 410 through the first groove 131. In this embodiment, one of the intake ring 120 and the end plate 130 is provided with a first groove 131, and the intake cavity 101 includes the first groove 131, and the first groove 131 extends to the inner hole of the intake ring 120 or the end plate 130, and the clamp 300 is penetrated in the inner hole of the intake ring 120 and the inner hole of the end plate 130, so that the cooling gas entering the intake cavity 101 can be guided to the periphery of the clamp 300 through the first groove 131, and then enter the gap 41 located at the periphery of the clamp 300. 0; and, the first groove 131 is arranged around the inner hole of the intake ring 120 or the end plate 130, that is, the first groove 131 is arranged around the fixture 300, so that the cooling gas guided to the periphery of the fixture 300 through the first groove 131 will surround all circumferential areas of the fixture 300, so that the cooling gas can enter the gap 410 from any area of ​​the gap 410 on its own circumference, so as to ensure the uniformity of the intake, and thus better take away the heat in the gap 410.

[0026] Of course, the first groove 131 may not extend to the inner hole of the intake ring 120 or the inner hole of the end plate 130. In this case, a gas channel may be provided on one of the intake ring 120 and the end plate 130 where the first groove 131 is provided, with one end of the gas channel extending to the inner wall of the first groove 131, and the other end of the gas channel extending to the inner hole of one of the intake ring 120 and the end plate 130 where the first groove 131 is provided.

[0027] In an optional embodiment, the end surface of the end plate 130 facing the intake ring 120 is provided with a first groove 131, the end surface of the intake ring 120 facing the end plate 130 is provided with a second groove 121, the second groove 121 is arranged around the inner hole of the intake ring 120, and the intake cavity 101 also includes the second groove 121. In this embodiment, the end surface of the intake ring 120 facing the end plate 130 is provided with a second groove 121, and the intake cavity 101 includes the first groove 131 and the second groove 121. Compared with the embodiment in which the intake cavity 101 only includes the first groove 131, this embodiment can increase the volume of the intake cavity 101, thereby reducing the pressure fluctuation of the gas in the intake cavity 101, so as to maintain a stable intake pressure, which can better take away the heat in the gap 410.

[0028] In a further embodiment, an annular protrusion 122 is formed between the second groove 121 and the inner hole of the intake ring 120, that is, the second groove 121 does not extend to the inner hole of the intake ring 120, and an intake hole 123 is provided on the intake ring 120, one end of the intake hole 123 extends to the second groove 121, and the other end of the intake hole 123 extends to the accommodating space 111.

[0029] In this embodiment, an air intake hole 123 is provided on the air intake ring 120, and the two ends of the air intake hole 123 are respectively connected with the second groove 121 and the accommodating space 111. Therefore, the cooling gas entering the air intake cavity 101 can enter the accommodating space 111 through the air intake hole 123, thereby taking away the heat in the accommodating space 111, thereby preventing the temperature in the accommodating space 111 from rising too high, thereby preventing the components in the accommodating space 111 from being damaged; in addition, one end of the air intake hole 123 extends to the second groove 121, and since an annular protrusion 122 is formed between the second groove 121 and the inner hole of the air intake ring 120, the annular protrusion 122 can block the cooling gas in the second groove 121 from flowing radially into the gap 410, so as to ensure the flow rate of the cooling gas entering the air intake hole 123 through the second groove 121, thereby ensuring the cooling effect of the cooling gas on the accommodating space 111. Furthermore, this embodiment can pass cooling gas into the accommodating space 111, thereby increasing the pressure in the accommodating space 111, so that the pressure in the accommodating space 111 is greater than the atmospheric pressure, thereby preventing foreign matter such as dust in the atmospheric environment from entering the accommodating space 111. It should be noted that this embodiment can be implemented independently from the previous embodiment. Of course, the second groove 121 can also extend to the inner hole of the intake ring 120, and this application is not limited to this.

[0030] In an optional embodiment, the air intake ring 120 is provided with an air intake hole 123, and the two ends of the air intake hole 123 are respectively connected to the accommodation space 111 and the air intake cavity 101. In this embodiment, the air intake ring 120 is provided with an air intake hole 123, and the two ends of the air intake hole 123 are respectively connected to the second groove 121 and the accommodation space 111, so that the cooling gas entering the air intake cavity 101 can enter the accommodation space 111 through the air intake hole 123, thereby taking away the heat in the accommodation space 111, thereby preventing the temperature in the accommodation space 111 from rising too high, thereby preventing partial damage in the accommodation space 111; in addition, this embodiment can pass the cooling gas into the accommodation space 111, thereby increasing the pressure in the accommodation space 111, so that the pressure in the accommodation space 111 is greater than the atmospheric pressure, thereby preventing foreign matter such as dust in the atmospheric environment from entering the accommodation space 111.

[0031] In an optional embodiment, a stator winding 500 is provided in the accommodating space 111, a permanent magnet 210 is provided on the rotor 200, the permanent magnet 210 is arranged corresponding to the stator winding 500, a suspension space 420 is provided between the stator winding 500 and the permanent magnet 210, and the air inlet hole 123 faces the suspension space 420 at one end away from the air inlet cavity 101. In a magnetic levitation motor, an alternating magnetic field is generated after current is passed through the stator winding 500. This magnetic field interacts with the fixed magnetic field generated by the permanent magnet 210 on the rotor 200, thereby making the magnetic levitation motor run. The change and interaction of the magnetic field will generate heat. Therefore, in this embodiment, the end of the air inlet 123 away from the air inlet cavity 101 is directed toward the suspension space 420 between the stator winding 500 and the permanent magnet 210, so that the cooling gas ejected from the air inlet 123 can flow to the suspension space 420, thereby dissipating heat for the permanent magnet 210 and the stator winding 500 at the same time, so as to prevent the permanent magnet 210 from demagnetizing in a high temperature environment, and to prevent the stator winding 500 from aging and damage in a high temperature environment. Of course, the end of the air inlet 123 away from the air inlet cavity 101 can also be directed toward the stator winding 500 or the permanent magnet 210, and this application is not limited to this.

[0032] In an optional embodiment, in the air intake direction of the air intake hole 123, the flow area of ​​the air intake hole 123 gradually decreases. Specifically, the air intake direction here is: the direction extending from the end of the air intake hole 123 close to the air intake cavity 101 to the end of the air intake hole 123 close to the accommodating space 111. In this embodiment, in the air intake direction of the air intake hole 123, the flow area of ​​the air intake hole 123 gradually decreases, that is, the closer the air intake hole 123 is to the accommodating space 111, the smaller the flow area is, which can increase the flow rate of the cooling gas when entering the accommodating space 111, and the high-speed airflow helps to take away more heat, thereby enhancing the cooling effect of the cooling gas on the accommodating space 111.

[0033] In order to improve the uniformity of the cooling gas entering the accommodating space 111, in an optional embodiment, there are multiple air inlet holes 123, and the multiple air inlet holes 123 are arranged at circumferential intervals along the air inlet ring 120. Therefore, the cooling gas in the air inlet cavity 101 can enter the accommodating space 111 through the multiple air inlet holes 123, which can improve the uniformity of the cooling gas entering the accommodating space 111.

[0034] In an optional embodiment, a connecting hole 124 is further provided on the intake ring 120 , one end of the connecting hole 124 extends to the outer peripheral surface of the intake ring 120 to form an intake port, and the other end of the connecting hole 124 extends to the inner wall of one of the intake holes 123 . In this embodiment, a connecting hole 124 is provided on the air intake ring 120, and the connecting hole 124 has the above-mentioned air inlet port. The connecting hole 124 is connected to one of the air intake holes 123, so the cooling gas entering from the connecting hole 124 can immediately enter the air intake hole 123. Compared with the embodiment in which the connecting hole 124 extends to the inner wall of the air intake cavity 101, the present embodiment enables the cooling gas to quickly enter the air intake hole 123 connected to the connecting hole 124, thereby timely cooling the accommodating space 111; and, since the air intake hole 123 is also connected to the air intake cavity 101, the cooling gas entering the air intake hole 123 from the connecting hole 124 will also flow into the air intake cavity 101, thereby entering the above-mentioned gap 410 and the remaining air intake holes 123.

[0035] In an optional embodiment, the connecting hole 124 includes a fixed section 1241 and a vent section 1242, the vent section 1242 is located between the fixed section 1241 and the connecting hole 124, and the inner circumference of the fixed section 1241 is provided with an internal thread for connecting a gas pipe (not shown in the figure) that can pass cooling gas. In this embodiment, the connecting hole 124 includes a fixed section 1241 and a vent section 1242, and the inner circumference of the fixed section 1241 is provided with an internal thread, so that after the gas pipe is docked with the fixed section 1241, the fixed section 1241 can be connected to the gas pipe by rotating the gas pipe, so that it is more convenient to fix the gas pipe. Furthermore, the cross-sectional area of ​​the fixed section 1241 is larger than the cross-sectional area of ​​the vent section 1242, so that a larger gas pipe can be inserted into the fixed section 1241 to increase the flow of cooling gas entering the air inlet cavity 101.

[0036] The above embodiments of the present application focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here. The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present application, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present application and the claims, all of which are within the protection of the present application.

Claims

1. A magnetic levitation motor capable of docking with an axial support device, the axial support device being used to axially support the magnetic levitation motor, the axial support device comprising a clamp (300), characterized in that: The magnetic levitation motor comprises a housing (100) and a rotor (200); the rotor (200) is rotatably disposed in the housing (100), a portion of the rotor (200) is located in the housing (100), and an accommodation space (111) for accommodating a stator winding (500) is formed in the housing (100). The clamp (300) can extend into the housing (100) and can be fixedly sleeved on the outside of the rotor (200); a gap (410) is provided between the clamp (300) and the housing (100); an air inlet cavity (101) is formed on the housing (100); the air inlet cavity (101) is located on one side of the accommodating space (111) and is in communication with the gap (410); and the air inlet cavity (101) has an air inlet port, which is used to allow cooling gas to pass through.

2. The magnetic levitation motor according to claim 1, characterized in that: The shell (100) comprises a shell body (110), an air intake ring (120) and an end plate (130); the end plate (130) can be connected to the axial support device; the housing space (111) is formed in the shell body (110); the air intake ring (120) is detachably connected to one end of the shell body (110); the end plate (130) is detachably connected to one end of the air intake ring (120) facing away from the shell body (110); the clamp (300) can pass through the end plate (130) and extend into the air intake ring (120); the air intake ring (120) and the end plate (130) cooperate to form the air intake cavity (101); and the gap (410) is provided between the air intake ring (120) and the clamp (300).

3. The magnetic levitation motor according to claim 2, characterized in that: One of the intake ring (120) and the end plate (130) is provided with a first groove (131), the first groove (131) being arranged around an inner hole of the intake ring (120) or an inner hole of the end plate (130), and the first groove (131) extending to the inner hole of the intake ring (120) or the inner hole of the end plate (130), The air intake cavity (101) comprises the first groove (131), and the air intake cavity (101) is connected to the gap (410) via the first groove (131).

4. The magnetic levitation motor according to claim 3, characterized in that: The end surface of the end plate (130) facing the air intake ring (120) is provided with the first groove (131), the end surface of the air intake ring (120) facing the end plate (130) is provided with a second groove (121), the second groove (121) is arranged around the inner hole of the air intake ring (120), and the air intake cavity (101) further comprises the second groove (121); An annular convex portion (122) is formed between the second groove (121) and the inner hole of the intake ring (120), and an intake hole (123) is provided on the intake ring (120), one end of the intake hole (123) extends to the second groove (121), and the other end of the intake hole (123) extends to the accommodating space (111).

5. The magnetic levitation motor according to any one of claims 2 to 4, characterized in that: The air intake ring (120) is provided with an air intake hole (123), and two ends of the air intake hole (123) are respectively connected to the accommodating space (111) and the air intake cavity (101).

6. The magnetic levitation motor according to claim 5, characterized in that: A stator winding (500) is arranged in the accommodating space (111), a permanent magnet (210) is arranged on the rotor (200), the permanent magnet (210) is arranged corresponding to the stator winding (500), a suspension space (420) is provided between the stator winding (500) and the permanent magnet (210), and an end of the air inlet hole (123) facing away from the air inlet cavity (101) faces the suspension space (420).

7. The magnetic levitation motor according to claim 5, characterized in that: In the air intake direction of the air intake hole (123), the flow area of ​​the air intake hole (123) gradually decreases.

8. The magnetic levitation motor according to claim 5, characterized in that: There are a plurality of air intake holes (123), and the plurality of air intake holes (123) are arranged at intervals along the circumference of the air intake ring (120).

9. The magnetic levitation motor according to claim 8, characterized in that: The air intake ring (120) is also provided with a connecting hole (124), one end of the connecting hole (124) extends to the outer peripheral surface of the air intake ring (120) to form the air intake port, and the other end of the connecting hole (124) extends to the inner wall of one of the air intake holes (123).

10. The magnetic levitation motor according to claim 9, characterized in that: The communication hole (124) comprises a fixed section (1241) and a vent section (1242); the vent section (1242) is located between the fixed section (1241) and the communication hole (124); an inner circumferential surface of the fixed section (1241) is provided with an internal thread for connecting a gas pipe capable of passing the cooling gas.

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