Motor device with efficient heat dissipation

Abstract

The utility model discloses an efficient heat dissipation motor device, which comprises a stator and a rotor, the stator comprises a stator iron core, each stator tooth of the stator iron core is wound with a coil, a stator sleeve is fixed in a middle shaft hole of the stator iron core, and the outer surface of one end part of the stator sleeve is provided with a stator disc; the rotor comprises a support, one end of the support is connected into the stator sleeve, the other end of the support is located outside the stator sleeve and provided with a rotor yoke part, the rotor yoke part, the stator disc and the stator sleeve are assembled to form an air space inside the motor, a plurality of magnetic steel arranged at intervals are annularly distributed on the inner side of the rotor yoke part, and heat dissipation ribs are attached to the outer disc face of the stator disc. Composite heat conduction materials are encapsulated in gaps of the magnetic steel and tooth grooves among the stator teeth wound with the coils, and the air space is filled with the composite heat conduction materials, so that heat generated by the coils is conducted to the heat dissipation ribs, and the heat is dissipated by the heat dissipation ribs. The working temperature of the coil is effectively reduced, and the operation efficiency of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic motors, in particular to a motor device with high-efficiency heat dissipation. Background Art

[0002] The efficiency of a motor depends on the various losses involved in the motor product, the largest of which is the copper loss of the motor. Under the condition that other losses are relatively fixed, the increase in temperature rise will lead to an increase in copper loss, which will directly lead to a decrease in motor efficiency. Conversely, when the efficiency of the motor is high, its temperature rise is relatively low. Assuming that other losses remain unchanged, the efficiency of the motor is negatively correlated with the temperature rise.

[0003] During the operation of motor products, all losses generated will be manifested in the form of heat. There are two main ways to control the temperature rise of the motor: reduce heat by optimizing the coil design; dissipate heat through motor heat transfer.

[0004] There are three ways of heat transfer in motors: heat conduction, heat convection and heat radiation. Heat conduction is very effective in transferring heat through cooling media (water cooling, oil cooling or hydrogen cooling, etc.), but it is large in size and high in cost, and is limited to high-power motors; heat convection is an effective way to dissipate heat through forced ventilation, but wind noise increases with the increase in speed, and its application is limited; heat radiation increases radiation heat dissipation by increasing heat dissipation ribs and increasing the contact area with the air, but this heat dissipation capacity is limited and is mostly used for heat dissipation of electronic devices.

[0005] For the traditional outer rotor motor, the space formed by the stator and the rotor is almost closed, the heat dissipation methods of heat convection and heat radiation are not very effective, and the heat conduction capacity is limited. As a result, the low heat dissipation capacity leads to a decrease in motor efficiency and a shortened motor service life. Utility Model Content

[0006] In order to solve the above technical problems existing in the prior art, the utility model proposes a motor device with high efficiency in heat dissipation, and its specific technical solution is as follows:

[0007] A motor device with high efficiency in heat dissipation comprises a stator and a rotor, wherein the stator comprises a stator core, each stator tooth of the stator core is wound with a coil, a stator sleeve is fixed in the middle shaft hole of the stator core, a stator disk is mounted on the outer surface of one end of the stator sleeve, and the rotor comprises a bracket, one end of the bracket is connected to the stator sleeve, and the other end is located outside the stator sleeve and is provided with a rotor yoke, and the rotor yoke forms an air space inside the motor after being assembled with the stator sleeve, and a plurality of magnets arranged with gaps are arranged on the inner side of the rotor yoke, and heat dissipation ribs are attached to the outer disk surface of the stator disk, and composite heat conductive materials are poured in the tooth slots between the gaps between the magnets and the stator teeth wound with the coils, and the composite heat conductive materials also fill the air space and contact with the inner surface of the stator sleeve and the outer surface of the stator sleeve, so as to conduct the heat generated by the coil to the heat dissipation ribs, which are dissipated by the heat dissipation ribs.

[0008] Furthermore, the composite thermally conductive material is thermally conductive adhesive.

[0009] Furthermore, the composite thermally conductive material comprises a thermally conductive adhesive, in which a thermally conductive metal belt is axially embedded, and the thermally conductive metal belt arranges the thermally conductive adhesive in layers to form a belt-shaped composite thermally conductive adhesive.

[0010] Furthermore, the composite thermally conductive material comprises a thermally conductive adhesive, in which thermally conductive metal wires are evenly distributed along the axial direction to form a wire-shaped composite thermally conductive adhesive.

[0011] Furthermore, the composite thermally conductive material comprises a thermally conductive adhesive, in which a thermally conductive metal mesh is distributed along an axial grid to form a mesh-shaped composite thermally conductive adhesive.

[0012] Furthermore, insulating paper is attached to the tooth groove wall.

[0013] Furthermore, a bearing group is connected between one end of the bracket and the stator sleeve.

[0014] Furthermore, the bearing group includes an inner end bearing and an outer end bearing, the outer end bearing is fixedly installed at the inner pipe opening of the other end of the stator sleeve and seals the stator sleeve with the rotor yoke, and the inner end bearing is fixedly installed in the stator sleeve and seals the stator sleeve with one end of the bracket.

[0015] Furthermore, a bearing isolation sleeve is sleeved between one end of the bracket and the stator sleeve, and the bearing isolation sleeve is located between the inner end bearing and the outer end bearing.

[0016] Furthermore, a spring buckle is provided at the connection between one end of the bracket and the inner end bearing.

[0017] The beneficial effects of the utility model are as follows: the utility model conducts the heat of the coil by arranging heat-conducting materials and heat-dissipating materials, thereby reducing the working temperature of the coil, improving the operating efficiency of the motor, extending the service life of the motor, and at the same time reducing the noise, vibration and unevenness of the motor, which is a new technical route to improve the comprehensive energy efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a conventional motor device in the prior art;

[0019] Figure 2 This is a schematic diagram of a motor device with high efficiency in heat dissipation and its stator structure according to an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of a motor device with high efficiency in heat dissipation and a rotor structure thereof according to an embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of the contact between the composite heat conductive material and the stator of the embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the composite thermally conductive material of the embodiment of the utility model being a thermally conductive adhesive;

[0023] Figure 6 It is a structural schematic diagram of the composite thermal conductive material of the embodiment of the utility model being a strip-shaped composite thermal conductive adhesive;

[0024] Figure 7 It is a schematic structural diagram of the composite thermal conductive material of the embodiment of the utility model being a wire-shaped composite thermal conductive adhesive;

[0025] Figure 8 It is a structural schematic diagram of the composite thermal conductive material of the embodiment of the utility model being a mesh-shaped composite thermal conductive adhesive;

[0026] In the figure, 1 is a composite thermal conductive material between coils; 2 is a coil; 3 is a stator core; 4 is an insulating paper; 5 is a bracket; 6 is a spring buckle; 7 is a bearing assembly; 8 is a stator sleeve; 9 is a bearing isolation sleeve; 10 is a magnet; 11 is a stator disk; 12 is a heat dissipation rib; 13 is a composite thermal conductive material between magnets; 14 is an air space; 51 is a back yoke; 81 is an outer surface of a stator sleeve; 101 is a thermal conductive adhesive; 102 is a thermal conductive metal belt; 103 is a thermal conductive metal wire; 104 is a thermal conductive metal mesh; 111 is an inner surface of a stator disk. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and technical effect of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments of the specification.

[0028] like Figure 1 As shown, in the operation of the existing traditional outer rotor motor, the heat generated by the coil 2 is enclosed in the air space 14 formed between the stator and the rotor, and is only conducted to the stator sleeve 8 and the stator disk 11 through the stator core 3 for radiation heat dissipation. The heat dissipation through the air contact surface with the stator and the rotor is also very limited. Therefore, the operating temperature rise increases, resulting in an increase in the copper loss of the motor, thereby reducing the efficiency of the motor.

[0029] like Figure 2~Figure 4 As shown, an electric motor device with high efficiency in heat dissipation according to an embodiment of the utility model comprises a stator and a rotor.

[0030] The stator includes a stator core 3, each stator tooth of the stator core 3 is wound with a coil 2, and an insulating paper 4 is attached to the tooth slot wall between each stator tooth. A stator sleeve 8 is fixed in the middle shaft hole of the stator core 3, and a stator disk 11 is installed on the outer surface of one end of the stator sleeve 8. The tooth slots between each stator tooth wound with the coil 2 are filled with a composite thermal conductive material 1 between the coils, and the composite thermal conductive material 1 between the coils is in contact with the inner surface 111 of the stator disk 11 and the outer surface 81 of the stator sleeve to increase the heat transfer efficiency. In addition, a heat dissipation rib 12 is attached to the outer disk surface of the stator disk 11.

[0031] The rotor includes a bracket 5, one end of which extends into the stator sleeve 8 and is connected to the stator sleeve 8 through a bearing group 7, and the other end is located outside the stator sleeve 8 and is provided with a rotor yoke. The rotor yoke, the stator disk 11, and the stator sleeve 8 are assembled to form an air space 14 inside the motor. A plurality of magnets 10 with gaps are arranged on the inner side of the back yoke 51 of the rotor yoke, and a composite heat-conducting material 13 between magnets is filled in the gaps between the magnets 10. The composite heat-conducting material 13 between magnets and the composite heat-conducting material 1 between coils fill the air space 14 together, and the heat generated by the coil 2 is conducted to the heat dissipation ribs 12, which are dissipated by the heat dissipation ribs 12. Among them, the composite heat-conducting material fills the air space 14, so that the air space 14 in the motor is greatly reduced, thereby having the effect of reducing noise, vibration, and roughness.

[0032] The bearing group 7 includes an inner end bearing and an outer end bearing, the outer end bearing is fixedly mounted at the inner pipe opening of the other end of the stator sleeve 8 and seals the stator sleeve 8 with the rotor yoke, the inner end bearing is fixedly mounted inside the stator sleeve 8 and seals the stator sleeve 8 with one end of the bracket 5, and a spring buckle 6 is provided at the connection between the stator sleeve 8 and one end of the bracket 5. A bearing isolation sleeve 9 is also provided between the inner end bearing and the outer end bearing, and the bearing isolation sleeve 9 is sleeved outside the bracket 5, that is, between the stator sleeve 8 and one end of the bracket 5.

[0033] like Figure 5 As shown, the composite thermal conductive material 13 between magnetic steels and the composite thermal conductive material 1 between coils may be pure thermal conductive adhesive 101 .

[0034] The composite heat-conducting material between the magnetic steels and the composite heat-conducting material between the coils may also be a composite material composed of the heat-conducting adhesive 101 and a metal material, for example:

[0035] like Figure 6 As shown, a heat-conducting metal belt 102 is inserted axially into the heat-conducting adhesive 101, and the heat-conducting metal belt 102 arranges the heat-conducting adhesive 101 in layers to form a belt-shaped composite material heat-conducting adhesive.

[0036] like Figure 7 As shown, heat-conducting metal wires 103 are evenly distributed in the axial direction in the heat-conducting adhesive 101 to form a wire-shaped composite material heat-conducting adhesive.

[0037] like Figure 8 As shown, a heat-conducting metal mesh 104 is distributed in the heat-conducting adhesive 101 along an axial grid to form a mesh-shaped composite material heat-conducting adhesive.

[0038] When the composite thermal conductive material 13 between magnetic steels and the composite thermal conductive material 1 between coils are in organic contact with motor components, the contact between the metal material part and the motor components can further accelerate the heat conduction of the composite thermal conductive material inside the motor, so that the heat can be more quickly conducted to the heat dissipation ribs 12 and dissipated to the outside.

[0039] The above is only a preferred implementation case of the utility model, and does not limit the utility model in any form. Although the implementation process of the utility model is described in detail above, for those familiar with the art, they can still modify the technical solutions recorded in the above examples, or replace some of the technical features therein with equivalents. All modifications and equivalent replacements made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An efficient heat dissipation motor device, comprising a stator and a rotor, The stator comprises a stator core, each stator tooth of the stator core is wound with a coil (2), a stator sleeve (8) is fixed in the middle shaft hole of the stator core (3), and a stator disc (11) is mounted on the outer surface of one end of the stator sleeve (8). The rotor comprises a bracket (5), one end of which is connected to the inside of a stator sleeve (8), and the other end of which is located outside the stator sleeve (8) and is provided with a rotor yoke, wherein the rotor yoke, the stator disk (11) and the stator sleeve (8) are assembled to form an air space (14) inside the motor, and a plurality of magnetic steels (10) are arranged in a gap arrangement on the inner side of the rotor yoke, and the characteristics are as follows: Heat dissipation ribs (12) are attached to the outer surface of the stator disk (11). Composite heat-conducting materials are filled in the gaps between the magnetic steel (10) and in the tooth slots between the stator teeth around which the coils (2) are wound. Furthermore, the composite heat-conducting material fills the air space (14) and contacts the inner surface (111) of the stator disk and the outer surface (81) of the stator sleeve.

2. The motor device according to claim 1, characterized in that: The composite heat-conducting material is a heat-conducting adhesive (101).

3. The motor device according to claim 1, characterized in that: The composite heat-conducting material comprises a heat-conducting adhesive (101), in which a heat-conducting metal belt (102) is axially inserted, and the heat-conducting metal belt (102) arranges the heat-conducting adhesive (101) in layers.

4. The motor device according to claim 1, characterized in that: The composite heat-conducting material comprises a heat-conducting adhesive (101), in which heat-conducting metal wires (103) are evenly distributed along the axial direction.

5. The motor device according to claim 1, characterized in that: The composite heat-conducting material comprises a heat-conducting adhesive (101), wherein a heat-conducting metal mesh (104) is distributed in an axial grid in the heat-conducting adhesive (101).

6. The motor device according to claim 1, characterized in that: Insulating paper (4) is attached to the tooth groove wall.

7. The motor device according to claim 1, characterized in that: A bearing group (7) is connected between one end of the bracket (5) and the stator sleeve (8).

8. The motor device according to claim 7, characterized in that: The bearing group (7) comprises an inner end bearing and an outer end bearing, the outer end bearing being fixedly mounted at the inner pipe opening of the other end of the stator sleeve (8) and sealingly connecting the stator sleeve (8) to the rotor yoke, and the inner end bearing being fixedly mounted in the stator sleeve (8) and sealingly connecting the stator sleeve (8) to one end of the bracket (5).

9. The motor device according to claim 8, characterized in that: A bearing isolation sleeve (9) is also sleeved between one end of the bracket (5) and the stator sleeve (8), and the bearing isolation sleeve (9) is located between the inner end bearing and the outer end bearing.

10. The motor device according to claim 8, characterized in that: A spring buckle (6) is provided at the connection between one end of the bracket (5) and the inner end bearing.

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