Shell assembly and motor

Abstract

The utility model discloses a housing assembly and a motor, and relates to the technical field of motors, the housing assembly comprises a housing and a fan cover; the shell is provided with an air inlet and an air outlet which are communicated with an inner cavity; the fan cover covers at least part of the outer side wall of the machine shell, a first ventilation channel is defined by the fan cover and the machine shell, and the first ventilation channel communicates with the air inlet and the air outlet. According to the technical scheme provided by the utility model, the wind resistance of the wind path in the shell assembly can be reduced so as to improve the heat dissipation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a housing component and a motor. Background Art

[0002] Water-cooled motors typically have cooling channels in their casings. Heat from the stator is transferred to the casing through the diameter of the stator core, where it is then carried away by the coolant flowing through the cooling channels, effectively dissipating the heat. However, the rotor's heat cannot be directly cooled using efficient heat conduction. Instead, ventilation holes are typically provided on the stator yoke and rotor. A fan forces air to flow through the internals, forming a closed internal air path from the cavity on one end, to the rotor vents, to the cavity on the other end, and finally to the stator vents. This transfers heat from the rotor's interior to the casing and the vents on the stator core yoke via convection, where it is then carried away by the coolant flowing through the cooling channels, effectively dissipating the heat.

[0003] Since the yoke of the stator punching sheet of the motor is small in size, it is not conducive to opening large ventilation holes, and small ventilation holes will cause large wind resistance in the internal air path and poor heat dissipation effect. Utility Model Content

[0004] The main purpose of the present invention is to provide a housing assembly and a motor, aiming to reduce the wind resistance of the air path inside the housing assembly to improve the heat dissipation effect.

[0005] To achieve the above objectives, the present invention provides a housing assembly comprising:

[0006] A casing, wherein the casing is provided with an air inlet and an air outlet communicating with an inner cavity thereof;

[0007] An air hood is provided on at least a portion of the outer side wall of the casing, and the air hood and the casing are enclosed to form a first ventilation duct, and the first ventilation duct is connected to the air inlet and the air outlet.

[0008] In one embodiment, the first ventilation passage is extended along the axial direction of the housing.

[0009] In one embodiment, the air inlet and the air outlet are respectively close to two ends of the housing.

[0010] In one embodiment, heat dissipation ribs are provided in the first ventilation duct.

[0011] In one embodiment, the heat dissipation ribs are connected to the outer side wall of the housing.

[0012] In one embodiment, the heat dissipation ribs are extended along the axial direction of the housing.

[0013] In one embodiment, a plurality of heat dissipation ribs are provided in the first ventilation duct, and the plurality of heat dissipation ribs are distributed at intervals along the circumference of the housing.

[0014] In one embodiment, the outer wall of the casing is provided with at least two wind shields, and the at least two wind shields are spaced apart along the circumference of the casing.

[0015] In one embodiment, a cooling water channel is formed between the inner wall and the outer wall of the casing.

[0016] In one embodiment, the cooling water channel is provided to extend spirally along the circumference of the casing.

[0017] To achieve the above object, the present invention further provides a motor comprising:

[0018] The above-mentioned housing assembly;

[0019] a stator, the stator being fixed to the inner wall of the casing;

[0020] a rotor, the rotor being disposed in the stator, the rotor being provided with a second ventilation duct, the second ventilation duct being connected to the air inlet and the air outlet;

[0021] A rotating shaft is provided through the rotor.

[0022] In one embodiment, the motor further includes a fan, which is disposed in an inner cavity of the housing. The fan operates to form an inner circulation air path with the second ventilation duct, the air outlet, the first ventilation duct, and the air inlet.

[0023] In one embodiment, the motor further includes an air guide cover, which is located in the internal circulation air path and connected to the housing assembly of the motor, and is used to guide the internal circulation air path to flow from one end to the other end of the second ventilation duct.

[0024] The technical solution of this utility model is to provide an air inlet and an air outlet on the housing, and to form a first ventilation duct connecting the air inlet and the air outlet by enclosing the air cover and the housing. Thus, when the housing assembly is applied to the motor, the first ventilation duct can be connected to the ventilation holes on the rotor through the air inlet and the air outlet. Under the action of the fan, an internal circulation air path can be formed, which is composed of a cavity on one end, a ventilation hole on the rotor (second ventilation duct), a cavity on the other end, an air outlet, the first ventilation duct, and the air inlet.

[0025] Therefore, the ventilation holes on the yoke of the stator punching sheet can be replaced by the first ventilation duct and the air inlet and outlet on the casing. The sizes of the air inlet and outlet opened on the shell, as well as the size of the first ventilation duct formed by the wind cover and the casing are much larger than the ventilation holes on the yoke of the stator punching sheet, and the wind resistance generated is also much smaller, which can effectively reduce the wind resistance of the air path inside the shell assembly and effectively improve the heat dissipation effect.

[0026] At the same time, by forming the first ventilation duct on the outer wall of the casing, the air flow can be directed to the outer wall of the casing, so that the heat of the stator and the rotor can be absorbed from both sides of the casing at the same time, thereby improving the heat dissipation effect.

[0027] In addition, since the ventilation holes in the yoke of the stator punching sheet are eliminated, the ventilation holes no longer occupy the space of the yoke of the punching sheet, which reduces the magnetic field density of the yoke of the stator punching sheet and reduces the heat generation of the yoke of the stator punching sheet. At the same time, the thermal resistance of the heat conduction path is reduced, which is more conducive to the heat dissipation of the entire stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 A schematic structural diagram of an embodiment of a housing assembly provided by the present utility model;

[0030] Figure 2 A front cross-sectional view of an embodiment of a motor provided by the present utility model;

[0031] Figure 3 A front view of an embodiment of a motor provided by the utility model;

[0032] Figure 4 A side view of an embodiment of a motor provided by the present utility model;

[0033] Figure 5 A side sectional view of an embodiment of a motor provided by the utility model;

[0034] Figure 6 A three-dimensional cross-sectional view of an embodiment of a motor provided by the utility model;

[0035] Figure 7 This is a front view of an embodiment of the motor provided by the present utility model with the wind shield removed;

[0036] Figure 8This is a front view of a motor provided in an embodiment of the present invention with a portion of the housing shown in perspective.

[0037] Description of Figure Numbers:

[0038] Label name Label name 100 motor 13 heat dissipation ribs 10 Housing assembly 20 stator 11 chassis 30 rotor 11a air inlet 31 Second ventilation duct 11b air outlet 40 shaft 11c cooling water channel 50 fan 12 Wind shield a Internal circulation air path 12a First ventilation duct 60 Air guide cover

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] 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 part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] Water-cooled motors typically have cooling channels in their casings. Heat from the stator is transferred to the casing through the diameter of the stator core, where it is then carried away by the coolant flowing through the cooling channels, effectively dissipating the heat. However, the rotor's heat cannot be directly cooled using efficient heat conduction. Instead, ventilation holes are typically provided on the stator yoke and rotor. A fan forces air to flow through the internals, forming a closed internal air path from the cavity on one end, to the rotor vents, to the cavity on the other end, and finally to the stator vents. This transfers heat from the rotor's interior to the casing and the vents on the stator core yoke via convection, where it is then carried away by the coolant flowing through the cooling channels, effectively dissipating the heat.

[0044] The small size of the stator lamination yoke makes it difficult to create large ventilation holes. Small ventilation holes, however, result in significant internal airflow resistance and poor heat dissipation. Furthermore, having too many ventilation holes in the stator lamination yoke increases the overall magnetic field density and iron loss, leading to severe heating and sometimes localized high temperatures. This increases the thermal resistance of the heat conduction path, impacting heat dissipation throughout the stator.

[0045] In view of the above problems, the present invention proposes a housing assembly 10 , which aims to reduce the wind resistance of the air path inside the housing assembly 10 to improve the heat dissipation effect.

[0046] See also Figures 1 to 7 In one embodiment of the present invention, the housing assembly 10 includes a casing 11 and a hood 12; the casing 11 is provided with an air inlet 11a and an air outlet 11b communicating with its inner cavity; the hood 12 is provided on at least a portion of the outer wall of the casing 11, and the hood 12 and the casing 11 are enclosed to form a first ventilation duct 12a, which communicates with the air inlet 11a and the air outlet 11b.

[0047] The technical solution of the present invention is to provide an air inlet 11a and an air outlet 11b on the housing 11, and to form a first ventilation duct 12a connecting the air inlet 11a and the air outlet 11b by enclosing the air cover 12 and the housing 11. Thus, when the housing assembly 10 is applied to the motor 100, the first ventilation duct 12a can be connected to the ventilation holes on the rotor 30 through the air inlet 11a and the air outlet 11b. Under the action of the fan 50, an internal circulation air path a is formed, which is composed of a cavity on one end, a ventilation hole on the rotor 30 (the second ventilation duct 31), a cavity on the other end, the air outlet 11b, the first ventilation duct 12a, and the air inlet 11a.

[0048] Therefore, the ventilation holes on the yoke of the stator punching sheet can be replaced by the first ventilation duct 12a and the air inlet 11a and the air outlet 11b on the casing 11. The sizes of the air inlet 11a and the air outlet 11b opened on the shell, as well as the size of the first ventilation duct 12a formed by the wind cover 12 and the casing 11 are much larger than the ventilation holes on the yoke of the stator punching sheet, and the wind resistance generated is also much smaller, which can effectively reduce the wind resistance of the air path inside the shell assembly 10 and effectively improve the heat dissipation effect.

[0049] At the same time, by forming the first ventilation channel 12a on the outer wall of the casing 11, the air flow can be directed to the outer wall of the casing 11, so that the heat of the stator 20 and the rotor 30 can be absorbed from both sides of the casing 11 at the same time, thereby improving the heat dissipation effect.

[0050] In addition, since the ventilation holes in the yoke of the stator punching sheet are eliminated, the ventilation holes no longer occupy the space of the yoke of the punching sheet, which reduces the magnetic field density of the yoke of the stator punching sheet and reduces the heat generation of the yoke of the stator punching sheet. At the same time, the thermal resistance of the heat conduction path is also reduced, which is more conducive to the heat dissipation of the entire stator 20.

[0051] Furthermore, conventional water-cooled motors 100 forcibly enlarge the ventilation holes on the stator 20 to reduce wind resistance, which also results in an unnecessary increase in the stator punchings, increasing the size of the motor 100 and increasing costs. However, the housing assembly 10 proposed in this solution does not require the enlargement of the ventilation holes on the stator 20 to reduce wind resistance, thus avoiding an increase in the size of the motor 100.

[0052] In this embodiment, when the housing assembly 10 is applied to the motor 100, the stator 20 is disposed in the inner cavity of the housing 11 and fixed to the inner wall of the housing 11. The rotor 30 is disposed within the stator 20, and a rotating shaft 40 is passed through the rotor 30. A side end cavity is formed between one end of the stator 20 and the rotor 30 and an inner side wall of the housing 11. The air inlet 11a and the ventilation hole (second ventilation duct 31) on the rotor 30 are connected through this side end cavity. Another side end cavity is formed between the other end of the stator 20 and the rotor 30 and the other inner side wall of the housing 11. The ventilation hole (second ventilation duct 31) on the rotor 30 and the air outlet 11b are connected through this side end cavity.

[0053] In actual application, the air cover 12 may cover the entire outer wall of the casing 11 , or may only cover a portion of the outer wall of the casing 11 .

[0054] Moreover, the first ventilation duct 12a formed between the air hood 12 and the casing 11 can extend along the axial direction of the casing 11, or along the circumferential direction of the casing 11, or can extend spirally along the circumferential direction of the casing 11, as long as the first ventilation duct 12a can be connected with the inner cavity of the casing 11 through the air inlet 11a and the air outlet 11b.

[0055] Furthermore, the air inlet 11 a and the air outlet 11 b may be respectively disposed near two ends of the housing 11 , or both disposed near one end of the housing 11 .

[0056] See also Figure 1 、 Figure 2 、 Figure 7 In one embodiment of the present invention, the first ventilation passage 12 a is extended along the axial direction of the housing 11 .

[0057] With such a setting, the length of the first ventilation duct 12a can be longer, and the air flow path flowing through the first ventilation duct 12a can be longer, which can extend the heat exchange area and duration between the air flow flowing through the first ventilation duct 12a and the cooling water channel 11c on the casing 11, and can improve the heat dissipation effect of the rotor 30.

[0058] See also Figure 1 、 Figure 2 、 Figure 7 In one embodiment of the present invention, the air inlet 11a and the air outlet 11b are respectively close to two ends of the housing 11.

[0059] Such a configuration can make the airflow path through the first ventilation channel 12a longer, and can further extend the heat exchange area and duration between the airflow through the first ventilation channel 12a and the cooling water channel 11c on the casing 11, thereby improving the heat dissipation effect on the rotor 30.

[0060] In actual application, the first ventilation duct 12a can be connected to the ventilation holes (second ventilation duct 31) on the rotor 30 through one or at least two air inlets 11a and one or at least two air outlets 11b.

[0061] See also Figure 1 、 Figure 2 、 Figure 5 、 Figure 7 In one embodiment of the present invention, a heat dissipation rib 13 is provided in the first ventilation duct 12a.

[0062] In this way, the heat dissipation ribs 13 can increase the heat convection heat dissipation area of ​​the internal circulation air path a. When the air flow flows through the first ventilation duct 12a, the heat of the air flow can be further conducted to the cooling water channel 11c on the casing 11 through the heat dissipation ribs 13, effectively improving the heat dissipation effect.

[0063] In practical application, the heat dissipation ribs 13 can be connected to the housing 11 or to the fan cover 12. Furthermore, the heat dissipation ribs 13 can extend along the axial direction of the housing 11, along the circumferential direction of the housing 11, or along the circumferential direction of the housing 11 in a spiral manner.

[0064] See also Figure 2 In one embodiment of the present invention, the heat dissipation ribs 13 are connected to the outer wall of the housing 11 .

[0065] In this arrangement, since the casing 11 has a cooling water channel 11c that can take away heat, and by connecting the heat dissipation ribs 13 to the outer wall of the casing 11, the heat dissipation ribs 13 can be closer to the cooling water channel 11c on the casing 11, so that the surface temperature of the heat dissipation ribs 13 is closer to the water temperature in the cooling water channel 11c, so that the temperature difference between the heat dissipation ribs 13 and the air flow flowing through the first ventilation channel 12a is larger, which is more conducive to taking away the heat of the air flow, thereby achieving a better heat dissipation effect.

[0066] In practical applications, the heat dissipation ribs 13 can be integrally formed with the housing 11 , or the heat dissipation ribs 13 can be fixedly connected to the outer wall of the housing 11 by welding, bonding, or the like.

[0067] See also Figure 1 、 Figure 2 In one embodiment of the present invention, the heat dissipation ribs 13 are extended along the axial direction of the housing 11 .

[0068] With such an arrangement, the heat dissipation ribs 13 can simultaneously play a role of guiding the airflow passing through the first ventilation channel 12a, and at the same time can reduce the obstruction of the heat dissipation ribs 13 to the airflow, thereby reducing wind resistance.

[0069] See also Figure 1 In one embodiment of the present invention, a plurality of heat dissipation ribs 13 are provided in the first ventilation duct 12 a , and the plurality of heat dissipation ribs 13 are distributed at intervals along the circumference of the housing 11 .

[0070] In this way, by arranging multiple heat dissipation ribs 13 in the first ventilation duct 12a, the heat convection heat dissipation area of ​​the internal circulation air path a can be further increased. When the air flow flows through the first ventilation duct 12a, the heat of the air flow can be further conducted to the cooling water channel 11c on the casing 11 through the multiple heat dissipation ribs 13, thereby further improving the heat dissipation effect.

[0071] See also Figure 4 、 Figure 5 In one embodiment of the present invention, the outer wall of the casing 11 is provided with at least two wind shields 12 , and the at least two wind shields 12 are distributed at intervals along the circumference of the casing 11 .

[0072] This arrangement, by distributing multiple hoods 12 at intervals around the circumference of the housing 11, allows airflow to be diverted to at least two first ventilation ducts 12a, thereby increasing the heat convection and heat dissipation area of ​​the internal circulation air path a. Furthermore, compared to using a single cylindrical hood 12 mounted on the housing 11, this solution not only ensures the inherent strength of the small hood 12, but also avoids problems such as resonance and abnormal noise that may be caused by a large hood 12.

[0073] See also Figure 1 、 Figure 2 、 Figure 8 In one embodiment of the present invention, a cooling water channel 11 c is formed between the inner wall and the outer wall of the casing 11 .

[0074] With this arrangement, the heat of the stator 20 is conducted to the housing 11 through the diameter of the stator core, and then the flowing coolant in the cooling water channel 11c on the housing 11 takes away the heat to achieve a heat dissipation effect. At the same time, during the flow of the internal circulation air path a, the heat of the rotor 30 can also be conducted to the housing 11, and then the flowing coolant in the cooling water channel 11c on the housing 11 takes away the heat to achieve a heat dissipation effect.

[0075] In actual application, the cooling water channel 11 c can extend along the axial direction of the casing 11 , can extend along the circumferential direction of the casing 11 , or can extend spirally along the circumferential direction of the casing 11 , as long as it can remove the heat conducted to the casing 11 .

[0076] See also Figure 1 、 Figure 8 In one embodiment of the present invention, the cooling water channel 11 c is spirally extended along the circumference of the casing 11 .

[0077] With this arrangement, the cooling water channel 11c extending in a circumferential spiral along the housing 11 is longer, which can make the flow path of the coolant in the cooling water channel 11c longer, and can better remove the heat conducted to the housing 11, thereby improving the heat dissipation effect.

[0078] See also Figures 2 to 8 The present invention also proposes a motor 100, which includes a stator 20, a rotor 30, a rotating shaft 40 and a housing assembly 10. The specific structure of the housing assembly 10 refers to the above embodiment. Since the motor 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0079] The stator 20 is fixed to the inner wall of the housing 11 ; the rotor 30 is disposed in the stator 20 , and the rotor 30 is provided with a second ventilation duct 31 , which communicates with the air inlet 11 a and the air outlet 11 b ; the rotating shaft 40 passes through the rotor 30 .

[0080] It can be understood that the first ventilation duct 12a is connected to the second ventilation duct 31 through the air inlet 11a and the air outlet 11b, and an internal circulation air path a can be formed consisting of the end cavity on one side - the second ventilation duct 31 - the end cavity on the other side - the air outlet 11b - the first ventilation duct 12a - the air inlet 11a.

[0081] See also Figure 2 In one embodiment of the present invention, the motor 100 further includes a fan 50, which is disposed in the inner cavity of the housing 11. The fan 50 operates to form an inner circulation air path a through the second ventilation duct 31, the air outlet 11b, the first ventilation duct 12a and the air inlet 11a.

[0082] With such an arrangement, the flow velocity of the air flow in the inner circulation air path a can be accelerated under the action of the fan 50, thereby improving the heat dissipation efficiency.

[0083] In one embodiment, the fan 50 may be directly connected to the rotating shaft 40 so that the fan 50 is driven to rotate when the rotating shaft 40 rotates.

[0084] See also Figure 6 In one embodiment of the present invention, the motor 100 further includes an air guide cover 60, which is located in the inner circulation air path a and is connected to a housing component of the motor 100, such as an end cover, for guiding the inner circulation air path a to flow from one end of the second ventilation duct 31 to the other end.

[0085] In this arrangement, since the fan 50 is arranged in the inner cavity on one side of the casing 11 and is arranged close to one end of the second ventilation duct 31, the design of the air guide cover 60 can guide the internal circulation air path a generated by the fan 50 when working to flow from one end of the second ventilation duct 31 to the other end, so as to form a left-right circulation effect, avoiding the internal circulation air path a from forming self-circulation in the inner cavity on one side of the casing 11, so that the heat dissipation effect can be improved.

[0086] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A housing assembly, characterized in that: include: A casing, wherein the casing is provided with an air inlet and an air outlet communicating with an inner cavity thereof; An air hood is provided on at least a portion of the outer side wall of the casing, and the air hood and the casing are enclosed to form a first ventilation duct, and the first ventilation duct is connected to the air inlet and the air outlet.

2. The housing assembly according to claim 1, wherein: The first ventilation duct is extended along the axial direction of the casing.

3. The housing assembly according to claim 2, wherein: The air inlet and the air outlet are respectively close to two ends of the casing.

4. The housing assembly according to any one of claims 1 to 3, wherein: Heat dissipation ribs are provided in the first ventilation duct.

5. The housing assembly according to claim 4, wherein: The heat dissipation ribs are connected to the outer side wall of the housing; And / or, the heat dissipation ribs are arranged to extend along the axial direction of the housing; And / or, a plurality of heat dissipation ribs are provided in the first ventilation duct, and the plurality of heat dissipation ribs are distributed at intervals along the circumference of the housing.

6. The housing assembly according to any one of claims 1 to 3, wherein: The outer wall cover of the casing is provided with at least two wind shields, and the at least two wind shields are distributed at intervals along the circumference of the casing.

7. The housing assembly according to any one of claims 1 to 3, wherein: A cooling water channel is formed between the inner wall and the outer wall of the casing.

8. The housing assembly according to claim 7, wherein: The cooling water channel is spirally extended along the circumference of the casing.

9. A motor, characterized in that: include: The housing assembly according to any one of claims 1 to 8; a stator, the stator being fixed to the inner wall of the casing; a rotor, the rotor being disposed in the stator, the rotor being provided with a second ventilation duct, the second ventilation duct being connected to the air inlet and the air outlet; A rotating shaft is provided through the rotor.

10. The motor according to claim 9, wherein The motor further includes a fan, which is disposed in an inner cavity of the housing. The fan operates to form an inner circulation air path among the second ventilation duct, the air outlet, the first ventilation duct, and the air inlet.

11. The motor according to claim 10, wherein The motor further includes an air guide cover, which is located in the inner circulation air path and connected to the housing assembly of the motor, and is used to guide the inner circulation air path to flow from one end to the other end of the second ventilation duct.

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