Auxiliary heat dissipation device applied to new energy driving motor and driving motor thereof

Abstract

The utility model discloses an auxiliary heat dissipation device applied to a new energy drive motor and a drive motor thereof, the auxiliary heat dissipation device comprises a motor body, the motor body comprises a stator and a rotor, auxiliary heat dissipation mechanisms are distributed at two ends of the rotor, and the auxiliary heat dissipation mechanisms comprise fans; the air guide plate assembly is provided with an air duct, an air outlet of the air guide plate assembly is right opposite to the end part of the stator winding, and the rotor moves to drive the auxiliary heat dissipation mechanism to rotate, so that air in the air duct is circularly blown out and blown in due to centrifugal force and internal and external pressure difference, and the air in the inner cavity of the motor body is driven to circulate; and the limiting and fixing assembly is matched with the rotating shaft, so that the auxiliary heat dissipation mechanism is circumferentially fixed and axially limited relative to the rotor. Symmetrical auxiliary heat dissipation mechanisms are additionally arranged on the basis of a current new energy electric drive rotor structure, centrifugal force and internal and external pressure difference are utilized to circularly drive air in an inner cavity of a motor to circulate in a reciprocating mode, and the heat exchange rate of a stator, a rotor and an outer shell is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary heat dissipation of drive motors, and in particular to an auxiliary heat dissipation device applied to new energy drive motors and the drive motor thereof. Background Art

[0002] Motor temperature rise has always been the primary factor limiting the improvement of electric drive power density.

[0003] Currently, most new energy drive motors use air cooling or water cooling to cool the stator and rotor. That is, the high heat generated during motor operation is transferred to the outer shell through metal components or internal air, where it exchanges heat with the external cold air or external water channels to achieve the purpose of heat dissipation. Although traditional air cooling or water cooling can solve the heat dissipation problem of motors to a certain extent, it has some limitations, such as:

[0004] On the one hand, air cooling systems use air as the cooling medium, which has a low specific heat capacity and limited heat dissipation capabilities. On the other hand, water cooling systems use coolant as the cooling medium. Although it has a higher specific heat capacity and better heat dissipation, the circulation of the coolant is also affected by factors such as water pump performance and pipe resistance.

[0005] On the other hand, the speed at which heat is conducted through metal components or the air within a cavity is limited by the thermal conductivity of the material and the heat transfer area. If the thermal conductivity is low or the heat transfer area is insufficient, the heat conduction rate will slow down. In other words, the heat conduction rate of this method is limited by the efficiency of heat exchange, resulting in less than ideal heat dissipation.

[0006] It can be seen that further improving the heat exchange efficiency based on the traditional new energy motor rotor is still a problem worth studying. Utility Model Content

[0007] The technical problem to be solved by the present invention is how to further improve the heat exchange efficiency on the basis of the traditional new energy motor rotor.

[0008] In order to solve the above technical problems, the present invention provides an auxiliary heat dissipation device for a new energy drive motor, comprising a motor body, wherein the motor body comprises a stator and a rotor, and auxiliary heat dissipation mechanisms are distributed at both ends of the rotor, wherein the auxiliary heat dissipation mechanisms comprise:

[0009] a fan, which is rotated by the motion of the rotor;

[0010] An air guide plate assembly is formed with an air duct, wherein the air outlet of the air guide plate assembly is directly opposite to the stator winding end, and the movement of the rotor drives the auxiliary heat dissipation mechanism to rotate, so that the air in the air duct is cyclically blown out and in due to centrifugal force and the internal and external pressure difference, thereby driving the air circulation in the inner cavity of the motor body; and

[0011] A limiting and fixing assembly cooperates with the rotating shaft to fix the auxiliary heat dissipation mechanism circumferentially and limit its position axially relative to the rotor.

[0012] Furthermore, the auxiliary heat dissipation mechanism is a trumpet-shaped structure and is coaxially arranged with the rotating shaft.

[0013] Furthermore, the air guide plate assembly includes a first air guide plate and a second air guide plate, and the edges of the first air guide plate and the second air guide plate are connected to each other through a plurality of ribs arranged at intervals.

[0014] Furthermore, an air inlet is provided on a side of the first air guide plate facing the end of the rotor.

[0015] Furthermore, the first air guide plate and the second air guide plate are arranged to form the air duct, the air duct is an outward-expanding trumpet-shaped path, and the air outlet of the air duct is directly opposite to the stator winding end.

[0016] Furthermore, the auxiliary heat dissipation mechanism also includes an inner sleeve in contact with the rotating shaft.

[0017] Furthermore, the limiting and fixing assembly includes a rectangular key and a positioning groove that cooperate with each other, wherein the rectangular key is arranged on the rotating shaft, and the positioning groove is arranged on the inner edge of the inner sleeve; the rectangular key and the positioning groove cooperate with each other so that the auxiliary heat dissipation mechanism can be circumferentially fixed relative to the rotor.

[0018] Furthermore, an elastic retaining ring is provided between the contact surface of the inner sleeve and the first air guide plate, so that the auxiliary heat dissipation mechanism can be axially limited relative to the rotor.

[0019] A drive motor comprises the auxiliary heat dissipation device applied to the new energy drive motor.

[0020] Furthermore, the auxiliary heat dissipation mechanism is symmetrically distributed at both ends of the rotor.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The utility model adds a symmetrical auxiliary heat dissipation mechanism on the basis of the current new energy electric drive rotor structure, utilizes centrifugal force and the internal and external pressure difference to cyclically drive the air circulation in the motor cavity, thereby improving the heat exchange rate between the stator, rotor and outer shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the overall structure disclosed in an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the rotor structure disclosed in an embodiment of the present utility model;

[0025] Figure 3 This is a cross-sectional view of the auxiliary heat dissipation mechanism disclosed in an embodiment of the present utility model, showing a schematic structural diagram of the air guide plate assembly;

[0026] Figure 4 This is a cross-sectional view of the auxiliary heat dissipation mechanism disclosed in an embodiment of the present utility model, showing a schematic structural diagram of the air duct;

[0027] Figure 5 This is a side view of the auxiliary heat dissipation mechanism disclosed in an embodiment of the present utility model, showing a structural schematic diagram of the inner sleeve.

[0028] In the picture:

[0029] 100, motor body; 111, stator; 112, rotor; 112a, rectangular key; 113, front cover; 114, rear cover; 115, housing;

[0030] 200. Auxiliary heat dissipation mechanism;

[0031] 211. First air guide plate; 212. Second air guide plate; 213. Rib plate;

[0032] 221, inner sleeve; 221a, positioning groove; 222, retaining ring. DETAILED DESCRIPTION

[0033] In order to make the technical solution and technical effect of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments.

[0034] The utility model aims to provide an auxiliary heat dissipation device for new energy drive motors, which further improves the heat exchange rate among the stator, rotor and outer shell based on the current new energy electric drive rotor structure.

[0035] refer to Figure 1-2 , mainly includes a motor body 100, which includes a stator 111, a rotor 112, a front cover 113, a rear cover 114 and a housing 115. This is a conventional structure of a drive motor and will not be described in detail here.

[0036] Auxiliary heat dissipation mechanisms 200 are symmetrically distributed at both ends of the rotor 112. The auxiliary heat dissipation mechanism 200 has a trumpet-shaped structure and is coaxially arranged with the rotating shaft. The auxiliary heat dissipation mechanism 200 includes a fan driven by the movement of the rotor 112, an air guide plate assembly forming an air duct, and a limit fixing assembly. Specifically:

[0037] refer to Figure 3-4The air outlet of the air guide plate assembly is facing the end of the stator winding. The rotation of the rotor 112 drives the auxiliary heat dissipation mechanism 200 to rotate, so that the air in the air duct is blown out and blown in cyclically due to centrifugal force and the internal and external pressure difference, thereby driving the air circulation in the inner cavity of the motor body 100.

[0038] Furthermore, the air deflector assembly includes a first air deflector 211 and a second air deflector 212. The edges of the first air deflector 211 and the second air deflector 212 are interconnected by a plurality of spaced ribs 213. Preferably, in this embodiment, the first air deflector 211 and the second air deflector 212 are interconnected by 11 evenly spaced ribs.

[0039] Furthermore, the first air guide plate 211 and the second air guide plate 212 are arranged to form an air duct, preferably in the shape of a trumpet that expands outward. An air inlet is provided on the side of the first air guide plate 211 facing the end of the rotor 112; the air outlet of the air duct faces the end of the stator winding, maximizing cooling and heat dissipation of the stator 111.

[0040] When the motor is working, the auxiliary heat dissipation mechanism 200 is driven by the rotor 112, and the air at the air inlet of the auxiliary heat dissipation mechanism 200 will be pressed by centrifugal force and thrown out along the air duct formed by the first air guide plate 211 and the second air guide plate 212 and blown toward the stator end winding; after the air in the air duct is thrown out, a low-pressure area will be formed, and the hot air at the air inlet will be sucked into the air duct under the action of the internal and external pressure difference; this cycle is repeated, so that the air circulation in the motor cavity can be accelerated under the drive of the fan, thereby improving the heat exchange rate between the stator 111, the rotor 112 and the shell 115.

[0041] Taking into account the high speed of the new energy drive motor, the fan adopts a two-layer wind guide plate design in structure, which can not only form an effective air path to accurately cool the stator winding end, but also increase the overall strength of the fan. In view of this, the fixation between the auxiliary heat dissipation mechanism 200 and the rotor 112 is also crucial.

[0042] Preferably, the auxiliary heat dissipation mechanism 200 and the rotating shaft of the rotor 112 are mated with a keyway.

[0043] refer to Figure 5 The limiting and fixing assembly cooperates with the rotating shaft so that the auxiliary heat dissipation mechanism 200 is circumferentially fixed and axially limited relative to the rotor 112.

[0044] Furthermore, the auxiliary heat dissipation mechanism 200 further includes an inner sleeve 221 in contact with the rotating shaft.

[0045] Furthermore, the limiting and fixing assembly includes a rectangular key 112a and a positioning groove 221a that cooperate with each other, wherein the rectangular key 112a is arranged on the rotating shaft of the rotor 112; the positioning groove 221a is arranged on the inner edge of the inner sleeve 221; the rectangular key 112a and the positioning groove 221a cooperate with each other, so that the auxiliary heat dissipation mechanism 200 can be circumferentially fixed relative to the rotor 112.

[0046] Furthermore, an elastic retaining ring 222 is provided between the contact surface of the inner sleeve 221 and the first air guide plate 211 , so that the auxiliary heat dissipation mechanism 200 can be axially limited relative to the rotor 112 .

[0047] It should be noted that a drive motor including the above-mentioned auxiliary heat dissipation device applied to the new energy drive motor also falls within the protection scope of the present utility model.

[0048] Preferably, the auxiliary heat dissipation mechanisms 200 are symmetrically distributed at both ends of the rotor 112. This makes the heat exchange rate between the motor stator 111, the rotor 112 and the housing 115 more efficient, thereby minimizing the temperature rise of the new energy motor stator 111 and the rotor 112, thereby improving the power density of the electric drive.

[0049] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary heat dissipation device for a new energy drive motor, comprising a motor body (100), wherein the motor body (100) comprises a stator (111) and a rotor (112), and is characterized in that: Auxiliary heat dissipation mechanisms (200) are distributed at both ends of the rotor (112), and the auxiliary heat dissipation mechanism (200) includes: a fan, which is driven to rotate by the movement of the rotor (112); An air guide plate assembly is formed with an air duct, the air outlet of the air guide plate assembly is directly opposite to the stator winding end, the rotation of the rotating shaft of the rotor (112) drives the auxiliary heat dissipation mechanism (200) to rotate, so that the air in the air duct is blown out and blown in cyclically due to centrifugal force and the internal and external pressure difference, thereby driving the air circulation in the inner cavity of the motor body (100); and A limiting and fixing assembly cooperates with the rotating shaft to enable the auxiliary heat dissipation mechanism (200) to be circumferentially fixed and axially limited relative to the rotor (112).

2. The auxiliary heat dissipation device for a new energy drive motor according to claim 1, characterized in that: The auxiliary heat dissipation mechanism (200) has a trumpet-shaped structure and is coaxially arranged with the rotating shaft.

3. The auxiliary heat dissipation device for a new energy drive motor according to claim 1, characterized in that: The wind deflector assembly comprises a first wind deflector (211) and a second wind deflector (212), wherein the edges of the first wind deflector (211) and the second wind deflector (212) are connected to each other via a plurality of ribs (213) arranged at intervals.

4. The auxiliary heat dissipation device for a new energy drive motor according to claim 3, characterized in that: An air inlet is provided on a side of the first air guide plate (211) facing the end of the rotor (112).

5. The auxiliary heat dissipation device for a new energy drive motor according to claim 3, characterized in that: The first air guide plate (211) and the second air guide plate (212) are arranged to form the air duct, the air duct is an outwardly expanding trumpet-shaped path, and the air outlet of the air duct is directly opposite to the stator winding end.

6. The auxiliary heat dissipation device for a new energy drive motor according to claim 3, characterized in that: The auxiliary heat dissipation mechanism (200) further includes an inner sleeve (221) in contact with the rotating shaft.

7. The auxiliary heat dissipation device for a new energy drive motor according to claim 6, characterized in that: The position-limiting and fixing assembly comprises a rectangular key (112a) and a positioning groove (221a) that cooperate with each other, wherein the rectangular key (112a) is arranged on the rotating shaft, and the positioning groove (221a) is arranged on the inner edge of the inner sleeve (221); the rectangular key (112a) and the positioning groove (221a) cooperate with each other, so that the auxiliary heat dissipation mechanism (200) can be circumferentially fixed relative to the rotor (112).

8. The auxiliary heat dissipation device for a new energy drive motor according to claim 6, characterized in that: An elastic retaining ring (222) is provided between the contact surface of the inner sleeve (221) and the first air guide plate (211), so that the auxiliary heat dissipation mechanism (200) can be axially limited relative to the rotor (112).

9. A driving motor, characterized in that: An auxiliary heat dissipation device for a new energy drive motor comprising the auxiliary heat dissipation device according to any one of claims 1 to 8.

10. The driving motor according to claim 9, characterized in that: The auxiliary heat dissipation mechanism (200) is symmetrically distributed at both ends of the rotor (112).

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