Motor with multiple sections of heat dissipation flow channels

Abstract

The utility model provides a motor with multiple sections of heat dissipation flow channels, which comprises a motor shell, a first radial bearing, a stator and rotor assembly, an axial bearing and a second radial bearing, the first section is as follows: y = A1 * 2-A2x, and A1 is more than or equal to 2.18 and less than or equal to 3.93; 1.18 < = A2 < = 2.93; the second section is as follows: y is equal to B1 * 4-B2 * 3 + B3* 2-B4x, and B1 is more than or equal to 4.47 and less than or equal to 13.25; b2 is greater than or equal to 32.93 and less than or equal to 13.92; 27.91 < = B3 < = 14.94; the third section is as follows: y is equal to C1 * 2 + C2x-C3, and C1 is more than or equal to-1.38 and less than or equal to-1.29; 0.32 < = C2 < = 0.39; 0.008 < = C3 < = 0.034. According to the utility model, the problems of poor heat dissipation performance and non-uniform temperature distribution in the motor in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor with multiple sections of heat dissipation channels. Background Art

[0002] Motors generate heat during operation. Excessive heat can cause motor failures and, in more serious cases, melt internal components. Therefore, heat dissipation is often a consideration in motor design. Currently, the main heat dissipation methods include air cooling and water cooling. Air cooling has a wider range of applications, requires less motor material, and can save costs and reduce losses. However, because existing technologies lack research on the flow paths within the motor, the motor's heat dissipation performance remains poor, resulting in uneven temperature distribution and large temperature differences within the motor.

[0003] Since the motors in the prior art have poor heat dissipation performance, resulting in uneven temperature distribution inside the motor and large temperature differences, the present invention studies and designs a motor with multiple heat dissipation channels. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the motor in the prior art, such as poor heat dissipation performance, uneven temperature distribution inside the motor and large temperature difference, thereby providing a motor with multiple heat dissipation channels.

[0005] In order to solve the above problems, the present invention provides a motor with multiple heat dissipation channels, which includes:

[0006] A motor housing, a first radial bearing, a stator-rotor assembly, an axial bearing, and a second radial bearing, wherein one axial end of the motor housing has a gas inlet, and the motor housing is further provided with a gas outlet, wherein the gas outlet is provided at the other axial end of the motor housing or on a side of the motor housing close to the other axial end of the motor housing relative to the gas inlet.

[0007] The first radial bearing, the stator-rotor assembly, the axial bearing, and the second radial bearing are all disposed in the motor housing. Along the direction of airflow and along the axial direction of the motor, the first radial bearing, the stator-rotor assembly, the axial bearing, and the second radial bearing are sequentially spaced apart.

[0008] The axial end surface of the first radial bearing facing the stator-rotor assembly is a first dividing interface, and the axial end surface of the axial bearing facing the stator-rotor assembly is a second dividing interface; along the axial direction of the motor, the section between the gas inlet and the first dividing interface is a first section, the section between the first dividing interface and the second dividing interface is a second section, and the section between the second dividing interface and the radial cross section where the gas outlet is located is a third section;

[0009] In the radial section, the first section: the central axis of the motor is the x-axis, the radial section of the gas inlet is the first reference plane at x=0, and the direction from the first reference plane to the first radial bearing is the positive direction of the x-axis. The total flow area of the gas channel in the radial section at the abscissa X on the x-axis is Y, and x=X / X max , y=Y / Y max , and in the first part of the segment, x and y satisfy the curvilinear relationship: y=A1x 2 -A2x, where 2.18≤A1≤3.93; 1.18≤A2≤2.93, X max is the maximum value of X in the first segment, Y max is the maximum value of Y in the first segment;

[0010] Second section: The central axis of the motor is the x-axis, the first interface is the second reference plane at x=0, and the direction from the second reference plane to the axial bearing is the positive direction of the x-axis. The total flow area of the gas channel in the radial cross section at the abscissa X on the x-axis is Y, and x=X / X max , y=Y / Y max , and in the second part, x and y satisfy the curvilinear relationship: y=B1x 4 -B2x 3 +B3x 2 -B4x, where 4.47≤B1≤13.25; 32.93≤B2≤13.92; 27.91≤B3≤14.94; 6.50≤B4≤9.24, X max is the maximum value of X in the second segment, Y max is the maximum value of Y in the second segment;

[0011] The third section: The central axis of the motor is the x-axis, the second interface is the third reference plane at x=0, and the direction from the third reference plane to the second radial bearing is the positive direction of the x-axis. The total flow area of the gas channel in the radial cross section at the abscissa X on the x-axis is Y, and x=X / X max , y=Y / Y max , and in the third segment, x and y satisfy the curvilinear relationship: y=C1x2 +C2x-C3, where -1.38≤C1≤-1.29; 0.32≤C2≤0.39; 0.008≤C3≤0.034, X max is the maximum value of X in the third segment, Y max is the maximum Y value in the third segment.

[0012] In some embodiments,

[0013] The total axial length of the motor housing is L, and the outer radius of the motor housing is R. k The total outer surface area of the motor housing is A k ;

[0014] The flow cross-sectional area of the gas inlet is A r , and there is A r With A k The relationship between them is: 0.0045≤A r / A k ≤0.01.

[0015] In some embodiments,

[0016] The axial length between the radial section at the gas outlet and the radial section at the gas inlet is 0.94-0.98L, and the flow cross-sectional area of the gas outlet is A s , A s With A r The relationship between is: 0.03≤A s / A r ≤0.08.

[0017] In some embodiments,

[0018] The motor housing further comprises a cover plate, wherein at least a portion of the cover plate is an annular structure, wherein an accommodating space for accommodating the first radial bearing is formed on the radial inner side of the annular structure, and the radial outer periphery of the annular structure is connected to the inner periphery of the motor housing; the cover plate further comprises a connecting portion connected to the annular structure in the axial direction, wherein the connecting portion extends radially outward to be flush with the outer periphery of the motor housing, and the outer radius of the connecting portion is R g , R g The outer radius R of the motor housing k The relationship between them is: R g =R k ;

[0019] The cover plate is provided with a first gas channel along the axial direction of the motor. The gas channel of the first section includes the first gas channel. The radial radius of the opening position of the first gas channel is 0.70-0.85R. g,

[0020] The flow area of the first gas channel is A1, and the flow cross-sectional area of the gas inlet is A r , and: 2≤A1 / A r ≤2.5.

[0021] In some embodiments,

[0022] There are a plurality of the first gas channels, which are spaced apart on the cover plate to form a ring structure, and a total flow area of the plurality of the first gas channels is A1.

[0023] In some embodiments,

[0024] The stator-rotor assembly includes a motor rotor and a stator core. A second gas channel exists between the motor rotor and the stator core. The gas channel of the second section includes the second gas channel. The outer radius of the motor housing is R k , the radius of the motor rotor is: R zz , the inner diameter of the stator core is: R dn , 0.3≤R zz / R k ≤0.35, 1.05≤R dn / R zz ≤1.15; the flow area of the second gas channel is A2, and A2 and the flow cross-sectional area A of the gas inlet r The relationship between them is: 0.1≤A2 / A r ≤0.15.

[0025] In some embodiments,

[0026] The outer periphery of the stator core is further sheathed with a motor aluminum sleeve, which is located on the inner periphery of the motor housing. A third gas channel is arranged on the motor aluminum sleeve. The gas channel of the second section also includes the third gas channel. The third gas channel runs from one axial end face of the motor aluminum sleeve to the other axial end face, so that the third gas channel and the second gas channel form a parallel flow channel. The outer periphery radius of the motor aluminum sleeve is R lt , R lt The outer radius R of the motor housing k The relationship is: 0.85≤R lt / R k ≤0.92, the radius of the center of the third gas channel in the radial section is 0.9R lt

[0027] ~0.95R ltThe flow cross-sectional area of the third gas channel is A3, and the relationship between A3 and the flow cross-sectional area A2 of the second gas channel is: 1.0≤A3 / A2≤1.3.

[0028] In some embodiments,

[0029] In the radial cross section, the second gas channel is an annular structure, and there are multiple third gas channels. The multiple third gas channels are spaced apart on the motor aluminum sleeve to form an annular structure, and the total flow cross-sectional area of the multiple third gas channels is A3.

[0030] In some embodiments,

[0031] The axial bearing includes an axial bearing stator 1, an axial bearing stator 2 and a thrust plate. In the axial direction of the motor, the thrust plate is located between the axial bearing stator 1 and the axial bearing stator 2. The axial bearing stator 2 and the axial bearing stator 1 have the same structure and are both provided with a fourth gas channel running through the axial direction. The gas channel of the third section includes the fourth gas channel. The radius of the axial bearing stator 1 and the axial bearing stator 2 are both R zd The outer peripheries of the axial bearing stator 1 and the axial bearing stator 2 are both in contact with the inner peripheral wall of the motor housing, R zd and the outer radius R of the motor housing k The relationship is: 0.7≤R zd / R k ≤0.8, the radius of the center of the fourth gas channel in the radial cross section is 0.75-0.85R zd The flow cross-sectional area of the fourth gas channel is A4, and the relationship between A4 and the flow cross-sectional area A3 of the third gas channel is: 0.65≤A4 / A3≤0.72.

[0032] In some embodiments,

[0033] The outer diameter of the thrust plate is R tl The outer diameter R of the stator with the axial bearing zd The relationship is: 0.7≤R tl / R zd ≤0.75, a fifth gas channel is arranged axially through the thrust plate, the gas channel of the third section includes the fifth gas channel, the flow cross-sectional area of the fifth gas channel is A5, and the relationship between A5 and the flow cross-sectional area A4 of the fourth gas channel is: 0.95≤A5 / A4≤1.0.

[0034] In some embodiments,

[0035] In a radial cross section, there are a plurality of the fourth gas channels, and the plurality of the fourth gas channels are spaced apart on the first axial bearing stator or the second axial bearing stator to form an annular structure, and a total flow cross-sectional area of the plurality of the fourth gas channels is A4;

[0036] In the radial cross section, there are multiple fifth gas channels, and the multiple fifth gas channels are spaced apart on the thrust disk to form an annular structure, and the total flow cross-sectional area of the multiple thrust disks is A5.

[0037] In some embodiments,

[0038] It also includes a rotating shaft and a heat dissipation impeller, at least part of the structure of the rotating shaft is arranged in the motor housing, and the first radial bearing, the stator and rotor assembly, the axial bearing and the second radial bearing are all sleeved on the outer circumference of the rotating shaft; the heat dissipation impeller is arranged at one axial end of the rotating shaft facing the gas inlet so that it can rotate integrally with the rotating shaft, and the heat dissipation impeller is located between the gas inlet and the cover plate.

[0039] In some embodiments,

[0040] The outer radius of the motor housing is R k , the total area of the outer surface of the motor housing is A k , the inner radius of the motor housing is R kn , the outer radius R of the motor housing k The inner radius R of the motor housing kn Satisfy between: 1.05≤R k / R kn ≤1.1.

[0041] The utility model provides a motor with multiple heat dissipation channels, which has the following beneficial effects:

[0042] The utility model provides a structure of multiple heat dissipation channels inside the motor, especially a first section between the gas inlet and the first radial bearing that is mainly used for heat dissipation and cooling of the first radial bearing, a second section that is mainly used for heat dissipation and cooling of the stator and rotor assembly, and a third section that is mainly used for heat dissipation and cooling of the axial bearing and the second radial bearing, and sets the relationship between the axial position X and the total flow area Y of the gas channel to satisfy y=A1x 2 -A2x, where 2.18≤A1≤3.93; 1.18≤A2≤2.93, y=B1x 4 -B2x 3 +B3x 2-B4x, where 4.47≤B1≤13.25; 32.93≤B2≤13.92; 27.91≤B3≤14.94; 6.50≤B4≤9.24, and y=C1x 2 +C2x-C3, where -1.38≤C1≤-1.29; 0.32≤C2≤0.39; 0.008≤C3≤0.034, can effectively design a more reasonable gas flow channel inside the motor, forming a new type of motor, which can give full play to the cooling effect of the gas on the various components of the motor, thereby reducing the temperature difference inside the motor and making the temperature field distribution more uniform, solving the problem of poor heat dissipation performance of existing motors, resulting in uneven temperature distribution and large temperature difference inside the motor. In addition, the utility model can also reduce the effect of gas pressure loss inside the motor through the design of the above-mentioned at least three sections of internal channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a structural diagram of the motor with multiple heat dissipation channels of the utility model;

[0044] Figure 2 It is a longitudinal cross-sectional view of the motor with multiple heat dissipation channels of the utility model;

[0045] Figure 3 This is a three-dimensional structural diagram of the motor aluminum sleeve in the motor with multiple sections of heat dissipation channels of the utility model;

[0046] Figure 4 yes Figure 2 BB cross-sectional view (showing the first gas channel);

[0047] Figure 5 yes Figure 2 CC cross-sectional view (showing the second and third gas channels);

[0048] Figure 6 yes Figure 2 DD cross-sectional view (showing the fourth and fifth gas channels);

[0049] Figure 7 This is a preferred curve structure diagram of the first section of the utility model;

[0050] Figure 8 This is a preferred curve structure diagram of the second section of the utility model;

[0051] Figure 9 This is a preferred curve structure diagram of the third section of the utility model;

[0052] Figure 10 This is a temperature distribution curve diagram of the motor with multiple heat dissipation channels of the utility model (compared with the prior art).

[0053] The reference numerals indicate:

[0054] 1. Motor housing; 2. Gas inlet; 3. Gas outlet; 4. Cooling impeller; 5. Rotating shaft; 6. Cover plate; 61. Ring structure; 62. Connecting part; 100. First radial bearing; 7. First radial bearing rotor; 8. First radial bearing stator; 9. Motor aluminum sleeve; 200. Stator and rotor assembly; 10. Stator core; 11. Motor rotor; 12. Coil; 300. Axial bearing; 13. Axial bearing stator 1; 14. Thrust plate; 15. Axial bearing stator 2; 400. Second radial bearing; 16. Second radial bearing rotor; 17. Second radial bearing stator; 101. First gas channel; 201. Second gas channel; 202. Third gas channel; 301. Fourth gas channel; 302. Fifth gas channel. DETAILED DESCRIPTION

[0055] 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 embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0057] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0058] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0059] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0060] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0061] like Figure 1-10 As shown, the utility model provides a motor with multiple heat dissipation channels, which includes:

[0062] A motor housing 1, a first radial bearing 100, a stator-rotor assembly 200, an axial bearing 300, and a second radial bearing 400. The motor housing 1 has a gas inlet 2 at one axial end. The motor housing 1 is also provided with a gas outlet 3. The gas outlet 3 is provided at the other axial end of the motor housing 1 or on a side of the motor housing 1 close to the other axial end of the motor housing 1 relative to the gas inlet 2.

[0063] The first radial bearing 100, the stator-rotor assembly 200, the axial bearing 300, and the second radial bearing 400 are all disposed in the motor housing 1. Along the direction of airflow and along the axial direction of the motor, the first radial bearing 100, the stator-rotor assembly 200, the axial bearing 300, and the second radial bearing 400 are sequentially spaced apart.

[0064] The axial end surface of the first radial bearing 100 facing the stator-rotor assembly 200 is a first boundary surface, and the axial end surface of the axial bearing 300 facing the stator-rotor assembly 200 is a second boundary surface. Along the axial direction of the motor, the section between the gas inlet 2 and the first boundary surface is a first section, the section between the first boundary surface and the second boundary surface is a second section, and the section between the second boundary surface and the radial section where the gas outlet 3 is located is a third section.

[0065] In the radial section, the first section: the central axis of the motor is the x-axis, the radial section of the gas inlet 2 is the first reference plane at x=0, and the direction from the first reference plane to the first radial bearing 100 is the positive direction of the x-axis. The total flow area of the gas channel in the radial section at the abscissa X on the x-axis is Y, and x=X / X max , y=Y / Y max , and in the first part of the segment, x and y satisfy the curvilinear relationship: y=A1x 2 -A2x, where 2.18≤A1≤3.93; 1.18≤A2≤2.93, X max is the maximum value of X in the first segment, Y max is the maximum value of Y in the first segment;

[0066] Second section: The central axis of the motor is the x-axis, the first interface is the second reference plane at x=0, and the direction from the second reference plane to the axial bearing 300 is the positive direction of the x-axis. The total flow area of the gas channel in the radial cross section at the abscissa X on the x-axis is Y, and x=X / Xmax , y=Y / Y max , and in the second part, x and y satisfy the curvilinear relationship: y=B1x 4 -B2x 3 +B3x 2 -B4x, where 4.47≤B1≤13.25; 32.93≤B2≤13.92; 27.91≤B3≤14.94;

[0067] 6.50≤B4≤9.24,X max is the maximum value of X in the second segment, Y max is the maximum value of Y in the second segment;

[0068] The third section: The central axis of the motor is the x-axis, the second interface is the third reference plane at x=0, and the direction from the third reference plane to the second radial bearing 400 is the positive direction of the x-axis. The total flow area of the gas channel in the radial cross section at the abscissa X on the x-axis is Y, and x=X / X max , y=Y / Y max , and in the third segment, x and y satisfy the curvilinear relationship: y=C1x 2 +C2x-C3, where -1.38≤C1≤-1.29; 0.32≤C2≤0.39; 0.008≤C3≤0.034, X max is the maximum value of X in the third segment, Y max is the maximum Y value in the third segment.

[0069] The utility model provides a structure of multiple heat dissipation channels inside the motor, especially a first section between the gas inlet and the first radial bearing that is mainly used for heat dissipation and cooling of the first radial bearing, a second section that is mainly used for heat dissipation and cooling of the stator and rotor assembly, and a third section that is mainly used for heat dissipation and cooling of the axial bearing and the second radial bearing, and sets the relationship between the axial position X and the total flow area Y of the gas channel to satisfy y=A1x 2 -A2x, where 2.18≤A1≤3.93; 1.18≤A2≤2.93, y=B1x 4 -B2x 3 +B3x 2 -B4x, where 4.47≤B1≤13.25; 32.93≤B2≤13.92; 27.91≤B3≤14.94; 6.50≤B4≤9.24, and y=C1x 2+C2x-C3, where -1.38≤C1≤-1.29; 0.32≤C2≤0.39; 0.008≤C3≤0.034, can effectively design a more reasonable gas flow channel inside the motor, forming a new type of motor, which can give full play to the cooling effect of the gas on the various components of the motor, thereby reducing the temperature difference inside the motor and making the temperature field distribution more uniform, solving the problem of poor heat dissipation performance of existing motors, resulting in uneven temperature distribution and large temperature difference inside the motor. In addition, the utility model can also reduce the effect of gas pressure loss inside the motor through the design of the above-mentioned at least three sections of internal channels.

[0070] The present invention provides a high heat dissipation performance motor with parallel heat dissipation channels. The internal structure of the motor is complex, and only the main components are provided here. It is a relatively simplified motor, which mainly includes a motor housing and a heat dissipation impeller. The motor housing is provided with heat dissipation gas outlets. The interior of the motor mainly includes an aluminum sleeve, a stator core, a rotating shaft, a motor rotor, a thrust plate, a coil, a front / rear rotor, a front / rear stator, and axial bearing stators one and two, and adopts parallel heat dissipation gas channels. The present invention normalizes the area and corresponding position of each part to obtain the following relationship: The first part satisfies the curve relationship: y = A1x 2 -A2x (2.18≤A1≤3.93; 1.18≤A2≤2.93), the gas channel area decreases first and then increases as the position changes. The decreasing part accelerates the heat dissipation gas, and the increasing part allows the gas to pass smoothly and reach the second part; the second part satisfies the curve relationship: y=B1x 4 -B2x 3 +B3x 2 -B4x (4.47≤B1≤13.25; 32.93≤B2≤13.92; 27.91≤B3≤14.94; 6.50≤B4≤9.24), the gas channel area decreases as the position changes. At this time, the heat dissipation gas reaches the position of the motor aluminum sleeve 9, and the gas cools and dissipates the stator core 10, the motor rotor 11 and other components; the third part satisfies the curve relationship: y=C1x 2 +C2x-C3 (-1.38≤C1≤-1.29; 0.32≤C2≤0.39; 0.008≤C3≤0.034), with the gas channel area decreasing with position. At this point, the cooling gas reaches the axial bearing stator 13, where it cools and dissipates heat from components such as the thrust plate 14 before ultimately being discharged from the motor's heat dissipation outlet 3. This fully utilizes the cooling gas's heat dissipation function, reducing the internal temperature gradient of the motor and achieving a more uniform temperature distribution. This lowers the temperature of high-temperature components within the motor, improves motor operation safety, and offers improved performance and application value.

[0071] In some embodiments,

[0072] The total axial length of the motor housing 1 is L, and the outer radius of the motor housing 1 is R. k The total outer surface area of the motor housing 1 is A k ;

[0073] The flow cross-sectional area of the gas inlet 2 is A r , and there is A r With A k The relationship between them is: 0.0045≤A r / A k ≤0.01.

[0074] The utility model sets the heat dissipation gas inlet at the top of the motor (i.e. the axial end of the rotating shaft), and the heat dissipation gas inlet area A r With A k The relationship between them is: 0.0045≤A r / A k ≤0.01, which can not only increase the heat exchange air flow rate, but also avoid causing large losses. It can prevent the impeller from not functioning due to the heat dissipation gas inlet area being too small, resulting in too small a gas flow entering the motor. At the same time, it can prevent the gas flow rate from slowing down and causing large losses when the heat dissipation gas inlet area is too large.

[0075] In some embodiments,

[0076] The axial length between the radial section at the gas outlet 3 and the radial section at the gas inlet 2 is 0.94-0.98L, and the flow cross-sectional area of the gas outlet 3 is A s , A s With A r The relationship between is: 0.03≤A s / A r ≤0.08.

[0077] The heat dissipation outlet of the motor of the present invention is preferably located at 0.94-0.98L (e.g. Figure 2 , the leftmost side of the motor housing is 0L, and the rightmost side is 1L). After passing through the forward stator (the second radial bearing stator), the area of the heat dissipation outlet is A s , A s With A r The relationship between is: 0.03≤A s / A r ≤0.08, which can not only reduce the residual gas inside the motor and the internal pressure loss, but also improve the heat dissipation and cooling effect; that is, it can effectively avoid the situation where the heat dissipation gas outlet area is too small, which will cause excess gas inside the motor and cause excessive internal pressure loss; it can also prevent the heat dissipation gas outlet area from being too large, which will cause the heat dissipation gas to escape without fully exerting its cooling effect.

[0078] In some embodiments,

[0079] The motor housing 1 further includes a cover plate 6, at least part of which is an annular structure 61. A receiving space for accommodating the first radial bearing 100 is formed on the radial inner side of the annular structure 61. The radial outer periphery of the annular structure 61 is connected to the inner periphery of the motor housing 1. The cover plate 6 also includes a connecting portion 62 axially connected to the annular structure 61. The connecting portion 62 extends radially outward to be flush with the outer periphery of the motor housing 1. The outer radius of the connecting portion 62 is R g , R g The outer radius R of the motor housing 1 k The relationship between them is: R g =R k ;

[0080] The cover plate 6 is provided with a first gas channel 101 along the axial direction of the motor. The gas channel of the first section includes the first gas channel 101. The radial radius of the opening position of the first gas channel 101 is 0.70-0.85R. g ,

[0081] The flow area of the first gas channel 101 is A1, and the flow cross-sectional area of the gas inlet 2 is A r , and: 2≤A1 / A r ≤2.5.

[0082] The utility model is to adjust the outer radius R of the cover plate g Set to the motor housing radius R k The relationship between them is: R g =R k , the first gas channel is located at 0.70-0.85R g The area of the first gas channel is A1, and the area of A1 and the area of the heat dissipation gas inlet are A r The relationship between them is: 2≤A1 / A r ≤2.5, which can enable the gas to smoothly reach the rear rotor and rear stator of the motor from the impeller part, and can also effectively avoid the pressure loss caused by the first gas channel being too small.

[0083] In some embodiments,

[0084] There are multiple first gas channels 101, which are spaced apart on the cover plate 6 to form a ring structure, and the total flow area of the multiple first gas channels 101 is A1. The first gas channels of the present invention are preferably evenly distributed circular hole gas channels, with the number of circular holes being 18-28.

[0085] In some embodiments,

[0086] The stator-rotor assembly includes a motor rotor 11 and a stator core 10. A second gas channel 201 exists between the motor rotor 11 and the stator core 10. The gas channel of the second section includes the second gas channel 201. The outer radius of the motor housing 1 is R k , the radius of the motor rotor 11 is: R zz , the inner diameter of the stator core 10 is: R dn , 0.3≤R zz / R k ≤0.35, 1.05≤R dn / R zz ≤1.15; the flow area of the second gas channel 201 is A2, and A2 and the flow cross-sectional area A of the gas inlet 2 r The relationship between them is: 0.1≤A2 / A r ≤0.15.

[0087] The utility model R zz and the motor housing radius R k The relationship is: 0.3≤R zz / R k ≤0.35. Furthermore, R dn With R zz The relationship between them is: 1.05≤R dn / R zz ≤1.15, the area of the second gas channel is A2. A2 and the area of the gas inlet 2 A r The relationship between them is: 0.1≤A2 / A r ≤0.15, which can dissipate heat for the motor rotor and stator core. The reason for selecting this ratio in this patent is that when the heat dissipation gas passes through the first gas channel with minimal loss and reaches the second gas channel, the gas channel needs to be narrowed, and the heat dissipation gas circulates there to dissipate heat for the motor components. This size range enables the heat dissipation gas to perform heat dissipation better, in order to prevent excessive pressure loss and local uneven heat dissipation caused by a single heat dissipation gas channel.

[0088] In some embodiments,

[0089] The outer periphery of the stator core 10 is further provided with a motor aluminum sleeve 9, which is located on the inner periphery of the motor housing 1. A third gas channel 202 is arranged on the motor aluminum sleeve 9. The gas channel of the second section also includes the third gas channel 202. The third gas channel 202 runs from one axial end face of the motor aluminum sleeve 9 to the other axial end face, so that the third gas channel 202 and the second gas channel 201 form a parallel flow channel. The outer periphery radius of the motor aluminum sleeve 9 is Rlt , R lt The outer radius R of the motor housing k The relationship is: 0.85≤R lt / R k ≤0.92, the radius of the center of the third gas channel 202 in the radial cross section is 0.9R lt ~0.95R lt The flow cross-sectional area of the third gas channel 202 is A3, and the relationship between A3 and the flow cross-sectional area A2 of the second gas channel 201 is:

[0090] 1.0≤A3 / A2≤1.3.

[0091] The motor aluminum sleeve 9 of the present invention is preferably matched with the motor housing 1. A third gas channel for evenly distributing heat is provided on the motor aluminum sleeve 9. The outer radius of the motor aluminum sleeve 9 is R lt , R lt and the motor housing radius R k The relationship is: 0.85≤R lt / R k ≤0.92, the third gas channel is located at 0.9-0.95R lt The total area of the third gas channel is A3, and the relationship between A3 and the area of the second gas channel A2 is: 1.0≤A3 / A2≤1.3. The second gas channel and the third gas channel form a parallel gas flow channel. Part of the gas flows through the second gas channel to dissipate heat and cool the motor rotor and stator core, while the other part of the gas flows through the third gas channel to the axial bearing stator on the rear side of the stator core, which can divert the heat dissipation gas. Part of the heat dissipation gas passes through the third gas channel to dissipate heat on the outside of the stator core, and works together with the heat dissipation gas in the second gas channel to achieve heat dissipation. In addition, the parallel flow channel can reduce pressure loss, dissipate heat more evenly, and circulate the heat dissipation gas.

[0092] In some embodiments,

[0093] In the radial cross section, the second gas channel 201 is an annular structure, and there are multiple third gas channels 202. The multiple third gas channels 202 are spaced apart on the motor aluminum sleeve 9 to form an annular structure, and the total flow cross-sectional area of the multiple third gas channels 202 is A3.

[0094] In this embodiment, the third gas channel is a uniformly distributed circular hole gas channel, and the number of circular holes is preferably 8-12, which can ensure the reasonable flow of heat dissipation gas inside the motor and prevent excessive pressure inside the motor. The parallel flow channels formed allow part of the heat dissipation gas to smoothly enter the rear components of the motor for cooling, thereby reducing the internal temperature of the motor.

[0095] In some embodiments,

[0096] The axial bearing 300 includes an axial bearing stator 13, an axial bearing stator 2 15 and a thrust plate 14. In the axial direction of the motor, the thrust plate 14 is located between the axial bearing stator 13 and the axial bearing stator 2 15. The axial bearing stator 13 and the axial bearing stator 2 15 have the same structure and are both provided with a fourth gas channel 301 running through them along the axial direction. The gas channel of the third section includes the fourth gas channel 301. The radius of the axial bearing stator 13 and the axial bearing stator 2 15 are both R zd The outer peripheries of the axial bearing stator 13 and the axial bearing stator 2 15 are both in contact with the inner peripheral wall of the motor housing 1, R zd and the outer radius R of the motor housing k The relationship is: 0.7≤R zd / R k ≤0.8, the radius of the center of the fourth gas channel 301 in the radial cross section is 0.75-0.85R zd The flow cross-sectional area of the fourth gas channel 301 is A4, and the relationship between A4 and the flow cross-sectional area A3 of the third gas channel 202 is: 0.65≤A4 / A3≤0.72.

[0097] The outer diameter of the first or second axial bearing stator of the utility model is R zd , axial bearing stator one or two cooperates with the motor housing, R zd and the motor housing radius R k The relationship is: 0.7≤R zd / R k ≤0.8, a fourth gas channel is arranged on the axial bearing stator, and the fourth gas channel is located at 0.75-0.85R zd The total area of the fourth gas channel is A4, and the relationship between A4 and the area A3 of the third gas channel is: 0.65≤A4 / A3≤0.72.

[0098] In some embodiments,

[0099] The outer diameter of the thrust plate 14 is R tl The outer diameter R of the axial bearing stator 13 zd The relationship is: 0.7≤R tl / R zd≤0.75, a fifth gas channel 302 is axially arranged on the thrust plate 14, the gas channel of the third section includes the fifth gas channel 302, the flow cross-sectional area of the fifth gas channel 302 is A5, and the relationship between A5 and the flow cross-sectional area A4 of the fourth gas channel 301 is: 0.95≤A5 / A4≤1.0.

[0100] The thrust plate 14 of the present invention is positioned between the first and second axial bearing stators. A fifth gas channel is disposed on the thrust plate. The total area of the fifth gas channel is A5, and the relationship between A5 and the area of the fourth gas channel, A4, is 0.95 ≤ A5 / A4 ≤ 1.0. This allows the cooling gas to flow through the forward stator (second radial bearing stator) and forward rotor (second radial bearing rotor) for cooling and dissipation before exiting through the gas heat dissipation outlet. The fourth gas channel and the fifth gas channel together divert the flow of the fluid, forming parallel channels to achieve heat dissipation at different component locations. To ensure effective heat dissipation and prevent localized overheating and pressure loss within the motor, the area ratio is 0.95 ≤ A5 / A4 ≤ 1.0, and should not be too large or too small.

[0101] In some embodiments,

[0102] In the radial cross section, there are multiple fourth gas channels 301, and the multiple fourth gas channels 301 are spaced apart on the axial bearing stator 13 or the axial bearing stator 2 15 to form a ring structure, and the total flow cross-sectional area of the multiple fourth gas channels 301 is A4;

[0103] In the radial cross section, there are multiple fifth gas channels 302 , which are spaced apart on the thrust disk 14 to form an annular structure. The total flow cross-sectional area of the multiple thrust disks 14 is A5 .

[0104] The fourth gas channel of the present invention is a gas channel with evenly distributed circular holes, and the number of the circular holes is 8-16.

[0105] The gas outlets of the present invention are symmetrically distributed on both sides of the motor housing and are circular hole-shaped fifth gas channels. The number of the circular holes is preferably 8-16.

[0106] In some embodiments,

[0107] It also includes a rotating shaft 5 and a heat dissipation impeller 4. At least part of the structure of the rotating shaft 5 is arranged in the motor housing 1, and the first radial bearing 100, the stator and rotor assembly 200, the axial bearing 300 and the second radial bearing 400 are all sleeved on the outer periphery of the rotating shaft 5; the heat dissipation impeller 4 is arranged at one axial end of the rotating shaft 5 facing the gas inlet 2 so that it can rotate integrally with the rotating shaft 5. The heat dissipation impeller 4 is located between the gas inlet 2 and the cover plate 6.

[0108] The top of the rotating shaft 5 of the present invention is preferably equipped with a heat dissipation impeller 4. The heat dissipation air generated by the heat dissipation impeller cools the internal components of the motor. The heat dissipation air first passes through the first air channel defined in the cover plate 6 and reaches the rear rotor (first radial bearing rotor 7) and the rear stator (first radial bearing stator 8). The rear rotor and rear stator cooperate, leaving a gap between them for the cooling air to cool. The heat dissipation air then passes through the second air channel formed by the gap between the motor rotor and the stator core, and the third air channel defined in the motor aluminum sleeve, dissipating heat and cooling the motor rotor and stator core. The heat dissipation air then reaches the vicinity of the axial bearing stator and the thrust plate, and then passes through the fourth air channel defined in the axial bearing stator and the fifth air channel defined in the thrust plate, reaching the forward rotor (second radial bearing rotor 16) and the forward stator (second radial bearing stator 17). The forward rotor and forward stator cooperate, leaving a gap between them for the cooling air to pass through and cool. The heat dissipation air is finally discharged through the heat dissipation air outlet defined in the motor housing.

[0109] In some embodiments,

[0110] The outer radius of the motor housing 1 is R k The total area of the outer surface of the motor housing 1 is A k , the inner radius of the motor housing 1 is R kn During implementation, the inner radius of the motor housing varies in different motor parts. To ensure the overall strength of the motor, the outer radius R of the motor housing 1 is k The inner radius R of the motor housing 1 kn Satisfy between: 1.05≤R k / R kn ≤1.1.

[0111] The motor housing of the present invention has a certain thickness, and the housing of this thickness can protect the internal components of the motor. The thickness of the motor housing varies along the axial direction of the motor. The thickness here is the ratio of the inner and outer diameters of the thinnest part of the motor housing, which can improve the strength of the motor. Too thin a thickness may cause insufficient strength of the motor in some parts.

[0112] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical principles of the present invention, several improvements and variations, as well as combinations between the embodiments, can be made. These improvements and variations should also be considered as the scope of protection of the present invention.

Claims

1. A motor with multiple heat dissipation channels, characterized in that: include: A motor housing (1), a first radial bearing (100), a stator-rotor assembly (200), an axial bearing (300), and a second radial bearing (400); the motor housing (1) has a gas inlet (2) at one axial end; the motor housing (1) is further provided with a gas outlet (3); the gas outlet (3) is provided at the other axial end of the motor housing (1) or on a side of the motor housing (1) close to the other axial end of the motor housing (1) relative to the gas inlet (2); The first radial bearing (100), the stator-rotor assembly (200), the axial bearing (300), and the second radial bearing (400) are all arranged in the motor housing (1). Along the direction of airflow and along the axial direction of the motor, the first radial bearing (100), the stator-rotor assembly (200), the axial bearing (300), and the second radial bearing (400) are sequentially spaced apart. The axial end surface of the first radial bearing (100) facing the stator-rotor assembly (200) is a first interface, and the axial end surface of the axial bearing (300) facing the stator-rotor assembly (200) is a second interface; along the axial direction of the motor, the section between the gas inlet (2) and the first interface is a first section, the section between the first interface and the second interface is a second section, and the section between the second interface and the radial section where the gas outlet (3) is located is a third section; In the radial section, the first section: the central axis of the motor is the x-axis, the radial section of the gas inlet (2) is the first reference plane at x=0, and the direction from the first reference plane to the first radial bearing (100) is the positive direction of the x-axis, the total flow area of the gas channel in the radial section at the abscissa X on the x-axis is Y, and x=X / X max , y=Y / Y max , and in the first part of the segment, x and y satisfy the curvilinear relationship: y=A1x 2 -A2x, where 2.18≤A1≤3.93; 1.18≤A2≤2.93, X max is the maximum value of X in the first segment, Y max is the maximum value of Y in the first segment; Second section: The central axis of the motor is the x-axis, the first interface is the second reference plane at x=0, and the direction from the second reference plane to the axial bearing (300) is the positive direction of the x-axis. The total flow area of the gas channel in the radial cross section at the horizontal coordinate X on the x-axis is Y, and x=X / X max , y=Y / Y max , and in the second part, x and y satisfy the curvilinear relationship: y=B1x 4 -B2x 3 +B3x 2 -B4x, where 4.47≤B1≤13.25; 32.93≤B2≤13.92; 27.91≤B3≤14.94; 6.50≤B4≤9.24,X max is the maximum value of X in the second segment, Y max is the maximum value of Y in the second segment; The third section: the central axis of the motor is the x-axis, the second interface is the third reference plane at x=0, and the direction from the third reference plane to the second radial bearing (400) is the positive direction of the x-axis, the total flow area of the gas channel in the radial cross section at the abscissa X on the x-axis is Y, x=X / X max , y=Y / Y max , and in the third segment, x and y satisfy the curvilinear relationship: y=C1x 2 +C2x-C3, where -1.38≤C1≤-1.29; 0.32≤C2≤0.39; 0.008≤C3≤0.034, X max is the maximum value of X in the third segment, Y max is the maximum Y value in the third segment.

2. The motor with multiple heat dissipation channels according to claim 1, characterized in that: The total axial length of the motor housing (1) is L, and the outer radius of the motor housing (1) is R. k The total outer surface area of the motor housing (1) is A k ; The flow cross-sectional area of the gas inlet (2) is A r , and there is A r With A k The relationship between is: 0.0045≤A r / A k ≤0.

01.

3. The motor with multiple heat dissipation channels according to claim 2, characterized in that: The axial length between the radial cross section at the gas outlet (3) and the radial cross section at the gas inlet (2) is 0.94-0.98L, and the flow cross-sectional area of the gas outlet (3) is A s , A s With A r The relationship between is: 0.03≤A s / A r ≤0.

08.

4. The motor with multiple heat dissipation channels according to claim 1, characterized in that: The motor housing (1) further comprises a cover plate (6), wherein at least a portion of the structure of the cover plate (6) is an annular structure (61), and an accommodating space for accommodating the first radial bearing (100) is formed on the radial inner side of the annular structure (61), and the radial outer periphery of the annular structure (61) is connected to the inner periphery of the motor housing (1); the cover plate (6) further comprises a connecting portion (62) connected to the annular structure (61) in the axial direction, and the connecting portion (62) extends radially outward to be flush with the outer periphery of the motor housing (1), and the outer radius of the connecting portion (62) is R g , R g The outer radius R of the motor housing (1) k The relationship between them is: R g =R k ; A first gas channel (101) is provided on the cover plate (6) along the axial direction of the motor, the gas channel of the first section includes the first gas channel (101), and the radial radius of the opening position of the first gas channel (101) is 0.70-0.85R g , The flow area of the first gas channel (101) is A1, and the flow cross-sectional area of the gas inlet (2) is A r , and: 2≤A1 / A r ≤2.

5.

5. The motor with multiple heat dissipation channels according to claim 4, characterized in that: There are a plurality of first gas channels (101), and the plurality of first gas channels (101) are spaced apart on the cover plate (6) to form a ring-shaped structure, and the total flow area of the plurality of first gas channels (101) is A1.

6. The motor with multiple heat dissipation channels according to claim 1, characterized in that: The stator-rotor assembly comprises a motor rotor (11) and a stator core (10), a second gas channel (201) exists between the motor rotor (11) and the stator core (10), the gas channel of the second section comprises the second gas channel (201), and the outer radius of the motor housing (1) is R k , the radius of the motor rotor (11) is: R zz , the inner diameter of the stator core (10) is: R dn , 0.3≤R zz / R k ≤0.35, 1.05≤R dn / R zz ≤1.15; the flow area of the second gas channel (201) is A2, and the flow cross-sectional area A of A2 and the gas inlet (2) is r The relationship between them is: 0.1≤A2 / A r ≤0.

15.

7. The motor with multiple heat dissipation channels according to claim 6, characterized in that: The outer periphery of the stator core (10) is further provided with a motor aluminum sleeve (9), the motor aluminum sleeve (9) is located on the inner periphery of the motor housing (1), a third gas channel (202) is arranged on the motor aluminum sleeve (9), the gas channel of the second section also includes the third gas channel (202), the third gas channel (202) passes through from one axial end face to the other axial end face of the motor aluminum sleeve (9), so that the third gas channel (202) and the second gas channel (201) form a parallel flow channel, and the outer periphery radius of the motor aluminum sleeve (9) is R lt , R lt The outer radius R of the motor housing k The relationship is: 0.85≤R lt / R k ≤0.92, the radius of the center of the third gas channel (202) in the radial cross section is 0.9R lt ~0.95R lt The flow cross-sectional area of the third gas channel (202) is A3, and the relationship between A3 and the flow cross-sectional area A2 of the second gas channel (201) is: 1.0≤A3 / A2≤1.

3.

8. The motor with multiple heat dissipation channels according to claim 7, characterized in that: In a radial cross section, the second gas channel (201) is an annular structure, and the third gas channel (202) is multiple, and the multiple third gas channels (202) are spaced apart on the motor aluminum sleeve (9) to form an annular structure, and the total flow cross-sectional area of the multiple third gas channels (202) is A3.

9. The motor with multiple heat dissipation channels according to claim 7, characterized in that: The axial bearing (300) includes an axial bearing stator 1 (13), an axial bearing stator 2 (15) and a thrust plate (14). In the axial direction of the motor, the thrust plate (14) is located between the axial bearing stator 1 (13) and the axial bearing stator 2 (15). The axial bearing stator 1 (13) and the axial bearing stator 2 (15) have the same structure and are both provided with a fourth gas channel (301) extending through the axial direction. The gas channel of the third section includes the fourth gas channel (301). The radii of the axial bearing stator 1 (13) and the axial bearing stator 2 (15) are both R zd The outer peripheries of the axial bearing stator 1 (13) and the axial bearing stator 2 (15) are both in contact with the inner peripheral wall of the motor housing (1), R zd and the outer radius R of the motor housing k The relationship is: 0.7≤R zd / R k ≤0.8, the radius of the center of the fourth gas channel (301) in the radial cross section is 0.75-0.85R zd The flow cross-sectional area of the fourth gas channel (301) is A4, and the relationship between A4 and the flow cross-sectional area A3 of the third gas channel (202) is: 0.65≤A4 / A3≤0.

72.

10. The motor with multiple heat dissipation channels according to claim 9, characterized in that: The outer diameter of the thrust plate (14) is R tl The outer diameter R of the axial bearing stator (13) zd The relationship is: 0.7≤R tl / R zd ≤0.75, a fifth gas channel (302) is arranged axially through the thrust plate (14), the gas channel of the third section includes the fifth gas channel (302), the flow cross-sectional area of the fifth gas channel (302) is A5, and the relationship between A5 and the flow cross-sectional area A4 of the fourth gas channel (301) is: 0.95≤A5 / A4≤1.

0.

11. The motor with multiple heat dissipation channels according to claim 10, characterized in that: In a radial cross section, the fourth gas channels (301) are multiple, and the multiple fourth gas channels (301) are spaced apart on the axial bearing stator 1 (13) or the axial bearing stator 2 (15) to form an annular structure, and the total flow cross-sectional area of the multiple fourth gas channels (301) is A4; In the radial cross section, there are multiple fifth gas channels (302), and the multiple fifth gas channels (302) are spaced apart on the thrust disk (14) to form an annular structure, and the total flow cross-sectional area of the multiple thrust disks (14) is A5.

12. The motor with multiple heat dissipation channels according to claim 4, characterized in that: The motor further comprises a rotating shaft (5) and a heat dissipation impeller (4), wherein at least a portion of the structure of the rotating shaft (5) is arranged in the motor housing (1), and the first radial bearing (100), the stator-rotor assembly (200), the axial bearing (300) and the second radial bearing (400) are all sleeved on the outer periphery of the rotating shaft (5); the heat dissipation impeller (4) is arranged at one axial end of the rotating shaft (5) facing the gas inlet (2) so as to be able to rotate integrally with the rotating shaft (5), and the heat dissipation impeller (4) is located between the gas inlet (2) and the cover plate (6).

13. The motor with multiple heat dissipation channels according to claim 1, characterized in that: The outer radius of the motor housing (1) is R k The total area of the outer surface of the motor housing (1) is A k The inner radius of the motor housing (1) is R kn , the outer radius R of the motor housing (1) k and the inner radius R of the motor housing (1) kn Satisfy between: 1.05≤R k / R kn ≤1.1.

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