A new energy intelligent drive motor cooling system

Abstract

The present invention discloses a new energy intelligent drive motor cooling system, which includes a water-cooled end cover and a high thermal conductivity stator assembly. The high thermal conductivity stator assembly is fixed inside the water-cooled end cover. The high thermal conductivity stator assembly includes a stator core, a winding coil, and a sealing and heat conduction mechanism. A number of stator core tooth parts are arranged in an array along the circumferential direction on the surface of the stator core. The winding coil is installed on the stator core tooth parts. The sealing and heat conduction mechanism is arranged between the water-cooled end cover and the stator core. A cooling circuit is arranged inside the water-cooled end cover, and a strong heat exchange area is arranged at the position corresponding to the back of each winding coil in the cooling circuit. Through the design of the strong heat exchange area, each group of winding coils can correspond to a strong heat exchange area, so that each group of winding coils can be key-cooled, thereby enhancing the overall heat dissipation effect of the disc motor.

Description

Technical Field

[0001] The present invention relates to a motor cooling system, and in particular to a new energy intelligent drive motor cooling system. Background Art

[0002] Different from the radial magnetic field of traditional cylindrical motors, the air gap of a disc motor is planar, and the air gap magnetic field is axial. It has the characteristics of short axial dimension, light weight, simple structure, and flexible control. At the same time, it also has advantages such as a high power / volume ratio, a high power factor, and a small required inverter capacity. It is a widely used motor. During operation, the disc motor will inevitably generate heat. Usually, a cooling flow channel is provided in the disc motor housing, and the motor is cooled by introducing circulating coolant into it. However, in the existing disc motor during use, the stator assembly is the main heat-generating component of the disc motor. The stator assembly is mainly composed of a stator core and winding coils. The winding coils are the main heat-generating bodies. Therefore, the temperature near the winding coils is usually the highest. Therefore, it is necessary to focus on cooling the position of the winding coils. However, the existing cooling flow channels located in the water-cooled end cover do not consider this point, resulting in the inability to cool the temperature around the winding coils well during the process of the cooling water flowing through the cooling flow channel, resulting in a poor overall heat dissipation effect of the disc motor. At the same time, during the heat generation process of the winding coils, the part near the inner circle of the stator core is usually denser, and the temperature is generally higher than that of the part of the winding coils located on the outer circle of the stator core. Therefore, it is also necessary to consider the characteristics of the lower temperature of the outer circle and the higher temperature of the inner circle of the stator assembly. Therefore, a new energy intelligent drive motor cooling system needs to be proposed. Summary of the Invention

[0003] The purpose of the present invention is to solve the existing problems and provide a new energy intelligent drive motor cooling system.

[0004] A new energy intelligent drive motor cooling system includes a water-cooled end cover and a high thermal conductivity stator assembly. The high thermal conductivity stator assembly is fixed in the water-cooled end cover. The high thermal conductivity stator assembly includes a stator core, winding coils, and a sealed heat conduction mechanism. A number of stator core tooth parts are arranged in an array along the circumferential direction on the surface of the stator core. The winding coils are installed on the stator core tooth parts. The sealed heat conduction mechanism is arranged between the water-cooled end cover and the stator core. A cooling circuit is provided inside the water-cooled end cover. A strong heat exchange area is provided at the position corresponding to the back of each winding coil in the cooling circuit. A coolant connection box is arranged outside the water-cooled end cover. A coolant inlet and a coolant outlet are arranged in the coolant connection box. The cooling circuit is connected to the coolant connection box.

[0005] The cooling circuit includes an annular main heat dissipation channel and a shunt heat dissipation ring. The head and tail ends of the annular main heat dissipation channel are respectively connected to the coolant inlet and the coolant outlet of the coolant connection box; the shunt heat dissipation ring corresponds to the back side positions of the winding coils one by one to form the strong heat exchange area, and the winding coils are mainly cooled through the shunt heat dissipation ring, thereby improving the overall heat dissipation effect.

[0006] The shunt heat dissipation ring includes a shunt island platform in the middle, an outer heat exchange flow channel and an inner heat exchange flow channel on both sides of the shunt island platform. It can make full use of the arrangement of the winding coils on the stator core. The winding coils near the inner circle of the stator core are arranged more densely, so the heat generated is greater than that of the winding coils located on the outer circle of the stator core. The strong heat exchange area is set, separated by the shunt island platform, and then the cooling water is mixed in the main heat dissipation channel, and then redistributed in the next shunt heat dissipation ring, so that the heat generated in the cooling water is redistributed, making full use of the advantage that the temperature of the outer circle is lower than that of the inner circle, comprehensively considering the temperature of the cooling water, ensuring that the outer circle of the winding coil can dissipate heat while the inner circle can dissipate heat sufficiently, and at the same time making reasonable use of the cooling water, which is more energy-saving and environmentally friendly.

[0007] Preferably, the width A of the outer heat exchange flow channel is smaller than the width B of the inner heat exchange flow channel, which can make full use of the characteristics of low temperature in the outer circle and high temperature in the inner circle to set the strong heat exchange area, so that the cooling water passing through the inner circle is greater than the cooling water passing through the outer circle, expanding the heat dissipation area of the inner circle, and being able to dissipate heat from the inner circle sufficiently, strengthening the overall heat dissipation effect.

[0008] Preferably, the shunt island platform is spindle-shaped, and the two pointed ends of the spindle are in the direction of the inlet and outlet of the annular main heat dissipation channel. Since the two ends of the spindle are relatively pointed, it is beneficial to the flow of water, reduces the flow resistance, and improves the heat dissipation effect.

[0009] Preferably, the sealing and heat conduction mechanism includes a heat conduction plate, a sealing plate, and heat dissipation columns. The heat conduction plate and the heat dissipation columns are made of heat-conducting materials, such as metal materials. The cooling circuit is a stepped groove type, and the stepped groove type is provided with a first step and a second step. The sealing plate is embedded in the first step of the stepped groove. The outer dimension of the sealing plate matches the track of the cooling circuit. The heat conduction plate is fixed on the other side of the sealing plate. The heat dissipation columns pass through the sealing plate and are fixedly connected to the heat conduction plate and are closely attached to the sealing plate. The sealing plate can be made of rubber material, which can wrap the heat dissipation columns to prevent the cooling water from overflowing.

[0010] Preferably, a clamping groove is opened on the first step of the stepped groove, and the clamping groove is along the track direction of the cooling circuit. The sealing plate is provided with a sealing strip that matches the clamping groove to prevent the water flow from overflowing from both sides of the cooling circuit and strengthen the sealing effect.

[0011] Preferably, a snap ring is provided on the second step, and a sealing ring that cooperates with the snap ring is fixedly connected to the heat conducting plate, preventing insufficient sealing between the sealing plate and the heat dissipating column, resulting in water flowing out from the gap between the heat dissipating column and the sealing plate, ensuring the sealing effect of the cooling circuit, preventing water seepage, and causing potential safety hazards.

[0012] Preferably, the heat dissipating column is spindle-shaped, and the two pointed ends of the spindle are in the directions of the inlet and outlet of the cooling circuit. Since the two ends of the spindle are relatively pointed, it is beneficial to the flow of water, reduces flow resistance, and improves the heat dissipation effect.

[0013] Preferably, the sealing and heat conducting mechanism is fixedly connected to the end cover by screws passing through the heat conducting plate, preventing problems such as loosening and displacement of the sealing and heat conducting mechanism.

[0014] The heat conducting plate is circular ring-shaped, and sealing rings are provided on both the inner ring and the outer ring of the heat conducting plate, capable of enclosing the cooling circuit between the inner ring and the outer ring of the heat conducting plate.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. Through the design of the strong heat exchange area in the present invention, each winding coil can correspond to a strong heat exchange area, so that key heat dissipation can be carried out for each group of winding coils, thereby enhancing the overall heat dissipation effect of the disc motor.

[0017] 2. Through the shunt island platform and the outer heat exchange flow channel and the inner heat exchange flow channel on both sides of the shunt island platform, after separation by the shunt island platform, the cooling water is mixed in the main heat dissipation channel and then redistributed in the next shunt heat dissipation ring, enabling the heat generated in the cooling water to be redistributed, making full use of the advantage that the temperature of the outer ring is lower than that of the inner ring, synthesizing the temperature of the cooling water, ensuring heat dissipation of the outer ring of the winding coil while enabling sufficient heat dissipation of the inner ring, and at the same time making reasonable use of the cooling water, being more energy-saving and environmentally friendly.

[0018] 3. In the present invention, the sealing plate of the sealing and heat conducting mechanism is embedded on the first step of the cooling circuit to enclose the cooling circuit, preventing water from overflowing. At the same time, the heat generated by the winding coil can be first conducted to the heat conducting plate through the heat conducting plate and then to the cooling circuit through the heat dissipating column, ensuring the sealing effect while preventing water from overflowing.

[0019] 4. The heat dissipating column of the present invention is spindle-shaped, and the two pointed ends of the spindle are in the directions of the inlet and outlet of the cooling circuit. Since the two ends of the spindle are relatively pointed, it is beneficial to the flow of water, reduces flow resistance, and improves the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the present invention disassembled;

[0021] Figure 2 Schematic diagram of the sealing and heat-conducting mechanism of the present invention;

[0022] Figure 3 Schematic diagram of the heat dissipation block of the sealing and heat-conducting mechanism of the present invention being oval;

[0023] Figure 4 Cross-sectional schematic diagram of the connection between the cooling circuit and the sealing and heat-conducting mechanism of the present invention;

[0024] Figure 5 Schematic diagram of the water flow direction of the cooling water of the present invention;

[0025] Figure 6 Cross-sectional schematic diagram of the disc motor of the present invention; Specific implementation manners

[0026] The following specific embodiments are only explanations of the present invention, and they are not limitations of the present invention. Those skilled in the art can make modifications without creative contributions to this embodiment as needed after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0027] The present invention will be described in detail below with reference to the accompanying drawings by way of examples.

[0028] Example 1:

[0029] As Figures 1-6As shown in the figure, a new energy intelligent drive motor cooling system includes a water-cooled end cover 1 and a high thermal conductivity stator assembly 2. The high thermal conductivity stator assembly 2 is fixed inside the water-cooled end cover 1. The high thermal conductivity stator assembly 2 includes a stator core 21, a winding coil 22, and a sealing and heat conduction mechanism 5. A number of stator core teeth 211 are arranged in a circumferential array on the surface of the stator core 21. The winding coil 22 is installed on the stator core teeth 211. The sealing and heat conduction mechanism 5 is arranged between the water-cooled end cover 1 and the stator core 21. A cooling circuit 4 is provided inside the water-cooled end cover 1; at the back position of each winding coil 22, the cooling circuit 4 is provided with a strong heat exchange area 43. A coolant connection box 7 is arranged outside the water-cooled end cover 1. A coolant inlet 71 and a coolant outlet 72 are arranged inside the coolant connection box 7; the cooling circuit 4 is connected to the coolant connection box 7; the cooling circuit 4 includes an annular main heat dissipation channel 48 and a shunt heat dissipation ring 49. The head and tail ends of the annular main heat dissipation channel 48 are respectively connected to the coolant inlet 71 and the coolant outlet 72 of the coolant connection box 7; the shunt heat dissipation ring 49 corresponds to the back side position of the winding coil 22 one by one to form the strong heat exchange area 43. The shunt heat dissipation ring 49 includes a shunt island platform 491 in the middle, an outer heat exchange flow channel 492 and an inner heat exchange flow channel 493 on both sides of the shunt island platform 491. The width A of the outer heat exchange flow channel 492 is smaller than the width B of the inner heat exchange flow channel 493. The shunt island platform 491 is spindle-shaped, and the two ends of the spindle tip are in the water inlet and outlet directions of the annular main heat dissipation channel 48.

[0030] As Figures 2-4 shown in the figure, the sealing and heat conduction mechanism 5 includes a heat conduction plate 51, a sealing plate 52, and a heat dissipation column 53. The cooling circuit 4 is of a stepped groove type. The cooling circuit 4 is provided with a first step and a second step. The sealing plate 52 is embedded on the first step. The heat conduction plate 51 is fixed on the other side of the sealing plate 52. The heat dissipation column 53 passes through the sealing plate 52 and is fixedly connected to the heat conduction plate 51 and the heat dissipation column is in close fit with the sealing plate 52. A card slot 401 is opened on the first step. A sealing strip 521 that cooperates with the card slot 401 is provided on the sealing plate 52. A snap ring 402 is opened on the second step. A sealing ring 522 that cooperates with the snap ring 402 is fixedly connected to the heat conduction plate 51. The heat dissipation column 53 is spindle-shaped.

[0031] The working principle of the structure of the present invention is: According to Figures 1-6As shown, the sealing plate 52 of the sealed heat conduction mechanism 5 is embedded on the first step 401. At the same time, the sealing strip 521 is snapped into the card slot 401, and the sealing ring 522 on the heat conduction plate 51 is snapped into the snap ring 62. Screws are used to fixedly connect the heat conduction plate 51 and the water-cooled end cover 1 in a sealed manner, thus completing the connection between the sealed heat conduction mechanism 5 and the water-cooled end cover 1. Then, the winding coil 22 is wound around the stator core 21, and the stator core 21 with the winding coil 22 wound thereon and the rotor assembly are installed between the two water-cooled end covers 1. The two water-cooled end covers 1 are connected by screws, thus completing the installation of the motor. Then, cooling water is input into the cooling circuit 4 through the inlet cooling channel 41. Under the sealing action of the sealing plate 52, the card slot 61 and the sealing strip 521, as well as the snap ring 62 and the sealing ring 522, the cooling water cannot flow out of the sealed heat conduction mechanism 5, ensuring the normal operation of the motor. At the same time, through the heat conduction effect of the sealed heat conduction mechanism 5, the heat can be quickly transferred to the cooling circuit 4 for rapid heat dissipation, ensuring the heat dissipation effect of the motor.

[0032] During the cooling process, the cooling water exchanges heat through the external heat exchange flow channel 492 and the internal heat exchange flow channel 493 for the heat generated by the winding coil 22 near the outer ring of the stator core 21 and the heat generated by the winding coil 22 near the inner ring of the stator core 21. The heat is exchanged through the heat conduction plate 51 and the heat dissipation column 53, thereby focusing on dissipating the heat generated near the winding coil 22, improving the heat dissipation effect near the winding coil 22, and thus improving the overall heat dissipation effect of the motor. After being separated by the flow dividing island platform 491, the cooling water is mixed in the annular main heat dissipation channel 48 and then redistributed in the next flow dividing heat dissipation ring 49, so that the heat generated in the cooling water is redistributed, making full use of the advantage that the temperature of the outer ring is lower than that of the inner ring, synthesizing the temperature of the cooling water, ensuring heat dissipation of the outer ring of the winding coil while enabling sufficient heat dissipation of the inner ring, and at the same time reasonably using the cooling water, which is more energy-saving and environmentally friendly.

[0033] Embodiment 2:

[0034] As Figure 4 , the difference from the above Embodiment 1 is that the heat dissipation block 53 is elliptical, and the long axis direction of the ellipse is consistent with the flow direction of the cooling water.

Claims

1. A new energy intelligent drive motor cooling system, characterized in that: It includes a water-cooled end cover (1) and a high thermal conductivity stator assembly (2). The high thermal conductivity stator assembly (2) is fixed inside the water-cooled end cover (1). The high thermal conductivity stator assembly (2) includes a stator core (21), a winding coil (22), and a sealing and heat conduction mechanism (5). A number of stator core tooth parts (211) are arranged in an array along the circumferential direction on the surface of the stator core (21). The winding coil (22) is installed on the stator core tooth parts (211). The sealing and heat conduction mechanism (5) is arranged between the water-cooled end cover (1) and the stator core (21). A cooling circuit (4) is arranged inside the water-cooled end cover (1). A strong heat exchange area (43) is arranged at the back position of each winding coil (22) corresponding to the cooling circuit (4). A coolant connection box (7) is arranged outside the water-cooled end cover (1). A coolant inlet (71) and a coolant outlet (72) are arranged inside the coolant connection box (7); the cooling circuit (4) is connected to the coolant connection box (7); The cooling circuit (4) includes an annular main heat dissipation channel (48) and a shunt heat dissipation ring (49). The head and tail ends of the annular main heat dissipation channel (48) are respectively connected to the coolant inlet (71) and the coolant outlet (72) of the coolant connection box (7); the shunt heat dissipation ring (49) corresponds to the back side position of the winding coil (22) one by one to form the strong heat exchange area (43); The shunt heat dissipation ring (49) includes a shunt island platform (491) in the middle, an outer heat exchange flow channel (492) and an inner heat exchange flow channel (493) on both sides of the shunt island platform (491); The sealing and heat conduction mechanism (5) includes a heat conduction plate (51), a sealing plate (52), and a heat dissipation column (53). The cooling circuit (4) is of a stepped groove type. The cooling circuit (4) is provided with a first step (401) and a second step (402). The sealing plate (52) is embedded on the first step (401). The heat conduction plate (51) is fixed on the other side of the sealing plate (52). The heat dissipation column (53) passes through the sealing plate (52) and is fixedly connected to the heat conduction plate (51) and the heat dissipation column is in close fit with the sealing plate (52).

2. The new energy intelligent drive motor cooling system according to claim 1, characterized in that, The width A of the outer heat exchange flow channel (492) is less than the width B of the inner heat exchange flow channel (493).

3. The new energy intelligent drive motor cooling system according to claim 1, characterized in that, The shunt island platform (491) is spindle-shaped, and the two pointed ends of the spindle are in the water inlet and outlet directions of the annular main heat dissipation channel (48).

4. The new energy intelligent drive motor cooling system according to claim 1, characterized in that, A clamping groove (403) is opened on the first step (401), and a sealing strip (521) matching the clamping groove (403) is arranged on the sealing plate (52).

5. A new energy intelligent drive motor cooling system according to claim 1, characterized in that, a snap ring (404) is provided on the second step (402), and a sealing ring (522) that cooperates with the snap ring (404) is fixedly connected to the heat conducting plate (51).

6. A new energy intelligent drive motor cooling system according to claim 1, characterized in that, the heat dissipation column (53) is spindle-shaped.

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