CN221263560U - Magnetic suspension motor - Google Patents

Abstract

The application discloses a magnetic suspension motor, which comprises a shell, two groups of bearing assemblies, a rotor, a stator, an air inlet, an air outlet and a guide plate, wherein the shell is arranged on the shell; the two groups of bearing assemblies are fixedly arranged in the shell, and the two groups of bearing assemblies are oppositely arranged at two ends of the shell along the axial direction of the shell; the rotor is positioned in the shell, and two ends of the rotor are rotationally connected with the two groups of bearing assemblies; the stator is positioned in the shell, sleeved on the rotor and provided with a gap with the rotor; the air inlet is arranged in the shell and communicated with the inside and the outside of the shell, the air inlet is used for allowing cooling air to enter the shell, and the air inlet is staggered with the bearing assembly along the axial direction of the shell; the air outlet is arranged on the shell, and the air outlet and the air inlet are arranged on two sides of the stator along the axial direction of the shell; the guide plate is sleeved on the rotor and fixed on the bearing assembly, and the guide plate is positioned between the bearing assembly and the air inlet along the axial direction of the shell. By adopting the magnetic suspension motor disclosed by the application, the turbulence phenomenon of cooling air in the magnetic suspension motor can be reduced, the cooling effect can be improved, and the cooling air can be prevented from directly blowing the bearing coil.

Description

Magnetic suspension motor

Technical Field

The application relates to the technical field of motor heat dissipation and cooling, in particular to a magnetic suspension motor.

Background

The magnetic suspension motor is widely applied to various fields of industrial production, and comprises a bearing and a rotor, wherein the bearing utilizes magnetic force to suspend the rotor in the air, so that no mechanical contact exists between the rotor and a stator. In order to ensure that the coil current of the bearing is uniform, the temperature of the coil needs to be strictly controlled, so that compared with the traditional motor, the magnetic suspension motor needs to be cooled timely and efficiently.

In the related art, cooling air is generally adopted to directly blow into the shell of the magnetic levitation motor, so that turbulent flow can be formed to influence the cooling effect, and the cooling air can also be directly blown onto the bearing coil to accelerate the aging of the bearing coil.

Disclosure of utility model

In order to solve the technical problems, the application provides the magnetic suspension motor which can reduce the turbulence phenomenon, prevent cooling wind from directly blowing the bearing coil and improve the cooling effect.

According to some embodiments, the present application provides a magnetic levitation motor comprising:

A housing;

The two groups of bearing assemblies are fixedly arranged in the shell, and are oppositely arranged at two ends of the shell along the axial direction of the shell;

The rotor is positioned in the shell, and two ends of the rotor are rotationally connected with the shell;

The stator is positioned in the shell, sleeved on the rotor and provided with a gap with the rotor;

The air inlet is arranged in the shell and communicated with the inside and the outside of the shell, the air inlet is used for supplying cooling air into the shell, and the air inlet is staggered with the bearing assembly along the axial direction of the shell;

The air outlet is arranged on the shell, and the air outlet and the air inlet are positioned on two sides of the stator along the axial direction of the shell;

The guide plate is sleeved on the rotor and fixed on the bearing assembly, and the guide plate is positioned between the bearing assembly and the air inlet along the axial direction of the shell.

In some embodiments of the present application, the deflector is a disk having a first mounting hole in the middle, and an outer circumference of the deflector is in close contact with an inner surface of the housing; the guide plate is sleeved on the rotor through the first mounting hole;

In some embodiments of the application, the baffle includes a baffle surface and a plurality of vents; the guide surface is arranged on one side of the guide plate, which is close to the stator; the ventilation holes penetrate through the guide plate along the axial direction of the shell, and the ventilation holes are distributed at intervals along the circumferential direction of the guide plate.

In some embodiments of the application, the guide surface is inclined relative to the axial direction of the housing, and the distance from the end of the guide surface, which is close to the rotor, to the stator is greater than the distance from the end of the guide surface, which is far away from the rotor, to the stator in the axial direction of the housing.

In some embodiments of the present application, the baffle further includes a clearance groove and a lead groove, the clearance groove is disposed on a side of the baffle facing the bearing assembly, and is used for accommodating a fixing screw in the bearing assembly; the lead groove is arranged on one side of the guide plate, which faces the bearing assembly, and is communicated with one vent hole and used for reserving a space for outgoing lines of the bearing assembly.

In some embodiments of the application, each set of the bearing assemblies comprises:

The bearing seat is arranged in the shell and is provided with a bearing hole;

The outer ring of the bearing is arranged in the bearing hole, the outer ring of the bearing is fixed relative to the bearing hole, and the inner ring of the bearing is sleeved on the rotor;

And the bearing coil is arranged on the inner ring of the bearing, and the bearing coil is not contacted with the outer surface of the rotor.

In some embodiments of the present application, the baffle further includes a plurality of second mounting holes, the second mounting holes penetrate through the baffle along an axial direction of the housing, and the plurality of second mounting holes are arranged at intervals along a circumferential direction of the first mounting holes.

In some embodiments of the present application, the deflector is fixedly connected to the bearing housing by a bolt, and the second mounting hole is used for mounting the bolt.

In some embodiments of the application, the magnetic levitation motor further comprises an outlet disposed on the housing and communicating between the inside and the outside of the housing, the outlet being configured to direct wires inside the housing to the outside of the housing.

In some embodiments of the application, the magnetic levitation motor further comprises a blocking plate positioned at one end of the housing along an axial direction of the housing.

The magnetic levitation motor provided by the application can realize the following beneficial technical effects:

In the magnetic suspension motor provided by the application, the flow guide plate is arranged in the shell along the axial direction of the shell and between the air inlet and the bearing assembly, so that the occurrence of the turbulence phenomenon in the shell can be reduced, and the cooling effect is improved; in addition, cooling air is prevented from being directly blown onto the bearing coil, so that ageing of the bearing coil is accelerated, the replacement frequency of the bearing coil is reduced, and the cost is saved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application. In the drawings, like reference numerals are used to identify like elements. The drawings, which are included in the description, illustrate some, but not all embodiments of the application. Other figures can be derived from these figures by one of ordinary skill in the art without undue effort.

Fig. 1 is a top view of a magnetic levitation motor according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view at A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view at B-B in FIG. 1

FIG. 4 is a schematic view of a baffle according to an embodiment of the present application;

FIG. 5 is an enlarged view of region C of FIG. 2;

FIG. 6 is a front view of the baffle of FIG. 4;

FIG. 7 is a schematic cross-sectional view of the baffle of FIG. 5;

Fig. 8 is a cooling air path shown in an embodiment of the present application.

Reference numerals:

11. A first cooling air region; 12. a second cooling air region; 13. a third cooling air region;

100. A housing; 110. a housing; 120. a base; 130. a first end cap; 140. a second end cap;

200. A bearing assembly; 210. a bearing seat; 220. a bearing; 230. a bearing coil;

300. a rotor;

400. A stator;

500. an air inlet;

600. An air outlet;

700. A deflector; 710. a first mounting hole; 720. a flow guiding surface; 730. a vent hole; 740. a clearance groove; 750. a wire slot; 760. a second mounting hole;

800. a wire outlet;

900. and a closure plate.

Detailed Description

In order to solve the problem that cooling air is scattered and directly blown onto the bearing coil and the ageing of the bearing coil is accelerated, the embodiment of the application provides the magnetic suspension motor, and the guide plate is arranged in the shell along the axial direction of the shell and between the air inlet and the bearing assembly, so that the scattered phenomenon can be reduced, the cooling effect is improved, and the cooling air is prevented from directly blowing onto the bearing coil.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.

The magnetic suspension motor provided by the embodiment of the application is used for reducing the turbulence phenomenon formed by cooling air in the shell, and can also avoid the direct blowing of the cooling air to the bearing coil. As shown in fig. 1 and 2, the axial direction of the housing 100 is the x-axis direction in fig. 1 and 2, and the magnetic levitation motor provided by the embodiment of the application includes the housing 100, two sets of bearing assemblies 200, a rotor 300, a stator 400, an air inlet 500, an air outlet 600 and a deflector 700, wherein the housing 100 is used for accommodating the two sets of bearing assemblies 200, the rotor 300, the stator 400 and the deflector 700, and the air inlet 500 and the air outlet 600 are disposed on the housing 100.

The case 100 includes a housing 110 and a base 120 for supporting the housing 110, and both ends of the housing 110 in an axial direction of the case 100 include a first end cap 130 and a second end cap 140.

The two groups of bearing assemblies 200 are fixedly arranged in the shell 100, and the two groups of bearing assemblies 200 are oppositely arranged at two ends of the shell 100 along the axial direction of the shell 100; the rotor 300 is installed along the axial direction of the housing 100, and both ends of the rotor 300 are rotatably connected with the first and second end caps 130 and 140, respectively; the stator 400 is located in the housing 100, and the stator 400 is sleeved on the rotor 300 and has a gap with the rotor 300.

The air inlet 500 is arranged on the shell 100 and is communicated with the inside and the outside of the shell 100, the air inlet 500 protrudes towards the direction away from the shell 100, threads are arranged on the outer surface of the air inlet 500, the air inlet 500 is used for being connected with an external fan for generating cooling air, the cooling air enters the shell 100 through the air inlet 500, and the air inlet 500 is staggered with the bearing assembly 200 along the axial direction of the shell 100.

The air outlet 600 is arranged on the shell 100, the air outlet 600 and the air inlet 500 are positioned at two sides of the stator 400 along the axial direction of the shell 100, and cooling air leaves the shell 100 through the air outlet 600; the number of the air outlets 600 may be one or more, and as an example, as shown in fig. 2, the number of the air outlets 600 is six.

The baffle 700 is sleeved on the rotor 300, the baffle 700 is fixed on the bearing assembly 200, and the baffle 700 is located between the bearing assembly 200 and the air inlet 500 along the axial direction of the housing 100.

As shown in fig. 8, the cooling air path of the magnetic levitation motor forms a first cooling air region 11 between the deflector 700 and the stator 400, a second cooling air region 12 is formed by a gap between the rotor 300 and the stator 400, and a third cooling air region 13 is formed between the rotor 300, the stator 400, and the air outlet 600. Cooling air is blown into the housing 100 of the magnetic levitation motor from the air inlet 500, passes through the second cooling air region 12 from the first cooling air region 11 under the flow guide of the flow guide plate 700, and is blown out from the air outlet 600 through the third cooling air region 13.

In the magnetic levitation motor provided by the embodiment of the application, the guide plate 700 is arranged in the shell 100 along the axial direction of the shell 100 and between the air inlet 500 and the bearing assembly 200, and the guide plate 700 has the advantages of guiding effect, reducing the occurrence of cooling air turbulence phenomenon in the shell 100, avoiding the direct blowing of cooling air onto the bearing assembly 200, accelerating the aging of the bearing assembly 200, improving the cooling effect, reducing the replacement frequency of the bearing assembly 200 and saving the cost.

In some embodiments, as shown in fig. 2 and 6, the baffle 700 is disc-shaped, the middle part of the baffle 700 has a first mounting hole 710, the baffle 700 is sleeved on the rotor 300 through the first mounting hole 710, and a gap exists between the baffle 700 and the rotor 300; the outer circumference of the baffle 700 is in close contact with the inner surface of the housing 100.

In some embodiments, as shown in fig. 4 and 6, the baffle 700 includes a baffle surface 720 and a plurality of ventilation holes 730, the baffle surface 720 being disposed on a side of the baffle 700 adjacent to the stator 400; the plurality of vent holes 730 penetrate the baffle plate 700 in the axial direction of the housing 100, and the plurality of vent holes 730 are arranged at intervals in the circumferential direction of the baffle plate 700. As an example, as shown in fig. 6, the number of the vent holes 730 is 20 and are uniformly and alternately arranged in the circumferential direction of the baffle 700.

In some embodiments, the magnetic levitation motor further includes an air-cooled impeller mounted on a side close to the second end cover 140, and when the magnetic levitation motor works, the air-cooled impeller is driven to generate cooling air entering the housing 100, and the ventilation hole 730 can be used as a cooling air channel for passing the cooling air generated by the air-cooled impeller, so that the cooling air is blown to the rotor 300 and the stator 400, and heat dissipation is achieved.

In some embodiments, as shown in fig. 2 and 7, the guide surface 720 is inclined with respect to the axial direction of the housing 100, and the distance from the end of the guide surface 720 near the rotor 300 to the stator 400 is greater than the distance from the end of the guide surface 720 far from the rotor 300 to the stator 400 in the axial direction of the housing 100.

By setting the flow guide surface 720 of the flow guide plate 700 to be an inclined surface, the occupation of the flow guide plate 700 to the internal space of the magnetic suspension motor is reduced, the space for accommodating cooling air is further increased, and the cooling effect is improved; in addition, the inclined plane shape is more convenient to process compared with an arc shape, and the cost is saved.

In some embodiments, as shown in fig. 4, the baffle 700 further includes a clearance groove 740 and a lead groove 750, the clearance groove 740 is disposed on a side of the baffle 700 facing the bearing assembly 200, and in this embodiment, the clearance groove 740 is an annular groove disposed along a circumferential direction of the first mounting hole 710; the lead groove 750 is provided at a side of the deflector 700 facing the bearing assembly 200, the lead groove 750 communicates with one of the vent holes 730, and the lead groove 750 also communicates with the space avoiding groove 740.

As shown in fig. 5 and 7, the clearance groove 740 is for receiving a set screw in the bearing assembly 200; since the bearing assembly 200 of the magnetic levitation motor needs to be energized, the guide plate 700 provides the lead groove 750 to reserve a space for the outgoing line of the bearing assembly 200, so that the electric line is led to the outside of the housing 100 through the lead groove 750 and through the vent hole 730 communicating with the lead groove 750.

In some embodiments, referring to fig. 2, the bearing assembly 200 includes a bearing housing 210, a bearing 220, and a bearing coil 230, the bearing housing 210 is fixedly installed in the housing 100, the bearing housing 210 is provided with a bearing hole, and an outer ring of the bearing 220 is installed in and fixed with respect to the bearing hole, and an inner ring of the bearing 200 is sleeved on the rotor 300; the bearing coil 230 is provided at an inner ring of the bearing 220, and the bearing coil 230 is not in contact with an outer surface of the rotor 300.

When cooling air is blown into the housing 100 of the magnetic levitation motor from the air inlet 500, the air guide plate 700 is closer to the air inlet 500 than the bearing coil 230 in the axial direction of the housing 100, so that the cooling air is not directly blown onto the surface of the bearing coil 230, but is blown from the air outlet 600 from the first cooling air region 11 through the second cooling air region 12 and then through the third cooling air region 13, thus, the cooling air is prevented from being directly blown onto the bearing coil 230 to accelerate the aging of the bearing coil 230, the frequency of replacing the bearing coil 230 is reduced, and the cost is saved.

In some embodiments, as shown in fig. 6, the baffle 700 further includes a plurality of second mounting holes 760, the second mounting holes 760 penetrating the baffle 700 in the axial direction of the housing 100, and the plurality of second mounting holes 760 being spaced apart in the circumferential direction of the first mounting holes 710; the baffle 700 is fixedly mounted to the bearing housing 210 by bolts, and the second mounting holes 760 are used for mounting the bolts.

In some embodiments, as shown in fig. 2, the magnetic levitation motor further includes a wire outlet 800, the wire outlet 800 being disposed at the housing 100 and communicating between the inside and the outside of the housing 100, the wire outlet 800 being used to guide wires inside the housing 100 to the outside of the housing 100. For example, the bearing assembly 200 requires power to be supplied, and the electrical wires of the bearing assembly 200 are routed through the lead slot 750, through the vent hole 730 communicating with the lead slot 750, and then from the outlet 800 to the outside of the housing 100. For example, the wires of the sensor are led to the outside of the housing 100 via the wire outlet 800.

In some embodiments, as shown in fig. 2, the magnetic levitation motor further includes a blocking plate 900, the blocking plate 900 is located at one end of the housing 100 along the axial direction of the housing 100, the blocking plate 900 is mounted on the second end cover 140, and the blocking plate 900 is made of aluminum or stainless steel, so that dust, sundries and the like are prevented from entering the housing 100 through the arrangement of the blocking plate 900, and normal operation of the magnetic levitation motor is ensured.

As shown in fig. 8, the cooling air path of the magnetic levitation motor forms a first cooling air region 11 between the deflector 700 and the stator 400, a second cooling air region 12 is formed by a gap between the rotor 300 and the stator 400, and a third cooling air region 13 is formed between the rotor 300, the stator 400, and the air outlet 600. Cooling air is blown into the housing 100 of the magnetic levitation motor from the air inlet 500, and is not directly blown onto the surface of the bearing coil 230 under the action of the air guide surface 720, but is blown out from the air outlet 600 from the first cooling air region 11 through the second cooling air region 12 and then through the third cooling air region 13.

By installing the guide plate 700 in the shell 100 along the axial direction of the shell 100 and between the air inlet 500 and the bearing assembly 200, the occurrence of cooling air turbulence in the magnetic levitation motor is reduced, and the cooling effect is improved; the cooling wind is prevented from directly blowing the bearing coil 230, the replacement frequency of the bearing coil 230 is reduced, and the cost is saved; in addition, the flow guide plate 700 disclosed by the application is simple and convenient in processing mode, and meanwhile, the occupation of the internal space of the magnetic suspension motor is reduced.

The above description may be implemented alone or in various combinations and these modifications are within the scope of the present application.

It should be noted that, in the description of the present application, the azimuth or positional relationship indicated by the terms "upper", "lower", "front", "rear", "axial", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A magnetic levitation motor, the magnetic levitation motor comprising:

A housing (100);

The two groups of bearing assemblies (200), the two groups of bearing assemblies (200) are fixedly arranged in the shell (100), and the two groups of bearing assemblies (200) are oppositely arranged at two ends of the shell (100) along the axial direction of the shell (100);

a rotor (300), wherein the rotor (300) is positioned in the shell (100), and two ends of the rotor (300) are rotationally connected with the shell (100);

The stator (400) is positioned in the shell (100), and the stator (400) is sleeved on the rotor (300) and has a gap with the rotor (300);

The air inlet (500) is formed in the shell (100) and is communicated with the inside and the outside of the shell (100), the air inlet (500) is used for allowing cooling air to enter the shell (100), and the air inlet (500) is staggered with the bearing assembly (200) along the axial direction of the shell (100);

The air outlet (600), the air outlet (600) is arranged on the shell (100), and the air outlet (600) and the air inlet (500) are positioned at two sides of the stator (400) along the axial direction of the shell (100);

The guide plate (700), guide plate (700) cover is located rotor (300), just guide plate (700) are fixed in on bearing assembly (200), guide plate (700) are located along the axial of casing (100) between bearing assembly (200) and air intake (500).

2. A magnetic levitation motor according to claim 1, wherein the deflector (700) is a disk having a first mounting hole (710) in the middle, and an outer circumference of the deflector (700) is in close contact with an inner surface of the housing (100); the guide plate (700) is sleeved on the rotor (300) through the first mounting hole (710).

3. The magnetic levitation motor of claim 2, wherein the deflector (700) comprises a deflector surface (720) and a plurality of vent holes (730);

The guide surface (720) is arranged on one side of the guide plate (700) close to the stator (400);

The plurality of ventilation holes (730) penetrate through the guide plate (700) along the axial direction of the shell (100), and the plurality of ventilation holes (730) are distributed at intervals along the circumferential direction of the guide plate (700).

4. A magnetic levitation motor according to claim 3, wherein the guide surface (720) is inclined with respect to the axial direction of the housing (100), and the guide surface (720) is located closer to the end of the rotor (300) than to the stator (400) along the axial direction of the housing (100), and is located farther from the end of the guide surface (720) away from the rotor (300).

5. A magnetic levitation motor according to claim 3, wherein the deflector (700) further comprises a clearance groove (740) and a lead groove (750), the clearance groove (740) being provided at a side of the deflector (700) facing the bearing assembly (200) for accommodating a fixing screw in the bearing assembly (200);

The lead groove (750) is arranged on one side of the guide plate (700) facing the bearing assembly (200), and the lead groove (750) is communicated with one vent hole (730) and is used for reserving a space for outgoing lines of the bearing assembly (200).

6. A magnetic levitation motor according to claim 1, wherein each group of the bearing assemblies (200) comprises:

A bearing housing (210), the bearing housing (210) being mounted within the housing (100), the bearing housing (210) being provided with a bearing bore;

The outer ring of the bearing (220) is arranged in the bearing hole, the outer ring of the bearing (220) is fixed relative to the bearing hole, and the inner ring of the bearing (220) is sleeved on the rotor (300);

And a bearing coil (230), wherein the bearing coil (230) is arranged on the inner ring of the bearing (220), and the bearing coil (230) is not contacted with the outer surface of the rotor (300).

7. The magnetic levitation motor of claim 2, wherein the deflector (700) further comprises a plurality of second mounting holes (760), the second mounting holes (760) penetrate the deflector (700) in an axial direction of the housing (100), and the plurality of second mounting holes (760) are arranged at intervals in a circumferential direction of the first mounting holes (710).

8. The magnetic levitation motor of claim 7, wherein the deflector (700) is fixedly coupled with the bearing housing (210) by a bolt, and the second mounting hole (760) is for mounting the bolt.

9. The magnetic levitation motor according to claim 1, further comprising a wire outlet (800), the wire outlet (800) being disposed in the housing (100) and communicating between the inside and the outside of the housing (100), the wire outlet (800) being configured to guide wires inside the housing (100) to the outside of the housing (100).

10. The magnetic levitation motor of claim 1, further comprising a closure plate (900), the closure plate (900) being located at one end of the housing (100) in an axial direction of the housing (100).