Permanent magnet motor liquid cooling structure and permanent magnet motor

Abstract

The application discloses a kind of permanent magnet motor liquid cooling structure and permanent magnet motor, belong to permanent magnet motor field.A kind of permanent magnet motor liquid cooling structure, comprising: shell, further comprising: serpentine radiating pipe, set on the shell, multiple bending parts are provided on the serpentine radiating pipe;The application is absorbed by setting heat-absorbing block to the heat rapidly promoted in short time, to effectively prevent the overheat phenomenon of permanent magnet motor, while the liquid cooling heat exchange mechanism can be reasonably used, without setting the liquid cooling heat exchange mechanism of power excessively large in suitable range, reduce use cost and equipment occupied volume, while effectively improve the heat dissipation efficiency and heat dissipation effect of permanent magnet motor.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet motor technology, and in particular to a liquid cooling structure for a permanent magnet motor and a permanent magnet motor. Background Technology

[0002] Permanent magnet motors are widely used in many fields, such as electric vehicles and industrial automation equipment. However, permanent magnet motors generate a lot of heat during operation, especially components such as stator windings, iron cores and permanent magnets. If heat dissipation is not timely and effective, it will lead to decreased motor efficiency, shortened lifespan or even damage. Traditional air cooling methods have limited heat dissipation effect on high power density permanent magnet motors. Therefore, liquid cooling structure has become one of the key technologies to solve the heat dissipation problem of permanent magnet motors. Liquid cooling technology mainly uses the circulation of coolant to absorb heat and then dissipates the heat through a liquid cooling heat exchange mechanism.

[0003] Currently, liquid cooling of permanent magnet motors mainly uses liquid cooling heat exchange mechanisms to dissipate heat. The power of the liquid cooling heat exchange mechanism mainly affects the cooling effect on the permanent magnet motor. At the same time, the larger the power of the liquid cooling heat exchange mechanism, the larger its size. In order to ensure its balance, the corresponding liquid cooling heat exchange mechanism is generally set according to the specific application scenario of the permanent magnet motor. For example, in the conveying industry, due to the excessive weight of some goods, the permanent magnet motor may experience a short-term overload. At this time, the permanent magnet motor heats up quickly. If it cannot be dissipated in time, it may damage the permanent magnet motor. However, the maximum heat dissipation capacity of the liquid cooling heat exchange mechanism is fixed, which may affect the heat dissipation of the permanent magnet motor. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a liquid cooling structure for a permanent magnet motor and a permanent magnet motor that can overcome or at least partially solve the above problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A liquid cooling structure for a permanent magnet motor includes: a housing; a serpentine heat sink disposed on the housing, the serpentine heat sink having multiple bends; transfer boxes symmetrically fixedly connected to the housing, the liquid inlet end of the serpentine heat sink communicating with one of the transfer boxes, the liquid outlet end of the serpentine heat sink communicating with another transfer box, the transfer box connected to the liquid inlet end of the serpentine heat sink having an inlet pipe, the other transfer box having an outlet pipe; multiple energy storage boxes arranged circumferentially on the outside of the housing; a heat absorption block fixedly disposed within the energy storage box; a return pipe symmetrically disposed between the energy storage box and the bends; a first temperature sensor disposed within the energy storage box; a second temperature sensor disposed on the housing; a first solenoid valve disposed within the bends; a second solenoid valve disposed within the return pipe; and a controller fixedly disposed on one of the transfer boxes.

[0007] Preferably, a first fixing plate is provided on one side of the housing, a second fixing plate is provided on the side of the housing away from the first fixing plate, an arc-shaped connecting plate is fixedly connected between two adjacent energy storage boxes, a plurality of heat dissipation grooves are provided on the arc-shaped connecting plate, a heat dissipation cavity is provided between the arc-shaped connecting plate and the housing, and a plurality of air inlet grooves are provided on the second fixing plate in a circular pattern.

[0008] To better meet different heat dissipation needs, a fan-cooled module is detachably connected to the second fixed plate. Multiple connecting screws are provided between the fan-cooled module and the second fixed plate. A cooling motor is fixedly connected inside the fan-cooled module, and a fan blade is fixedly connected to the output end of the cooling motor.

[0009] To ensure consistent coolant flow, a partition is provided inside the energy storage box, and two heat-absorbing blocks are provided, one on each side of the partition. A round hole is provided on the side of the partition away from the return pipe.

[0010] Preferably, a plurality of annular heat dissipation fins are fixedly connected at equal intervals on the housing, and a plurality of through holes are formed on the annular heat dissipation fins.

[0011] To facilitate heat dissipation from the annular heat sink fins, multiple transverse heat sink fins are fixedly connected between the annular heat sink fins, and the transverse heat sink fins are matched with the air inlet slots.

[0012] To facilitate better heat exchange of the coolant, the serpentine heat dissipation tube is further provided with multiple spiral grooves.

[0013] Furthermore, multiple turbulence plates are fixedly connected inside the serpentine heat dissipation pipe, and the turbulence plates are inclined and spirally arranged.

[0014] To further improve the turbulence of the coolant inside the serpentine heat pipes, an electric telescopic rod is fixedly connected inside the transfer box.

[0015] A permanent magnet motor includes a liquid cooling structure for the permanent magnet motor and a stator disposed within the housing. A rotor is disposed within the stator, and a rotating shaft is fixedly connected to one end of the rotor.

[0016] Compared with the prior art, the present invention provides a liquid cooling structure for a permanent magnet motor, which has the following beneficial effects:

[0017] 1. The liquid cooling structure of this permanent magnet motor effectively prevents overheating by absorbing the heat generated rapidly in a short time through the setting of heat absorption blocks. At the same time, it can make reasonable use of liquid cooling heat exchange mechanism, and within a suitable range, there is no need to set up a liquid cooling heat exchange mechanism with excessive power, thereby reducing the operating cost and equipment volume.

[0018] 2. The liquid cooling structure of the permanent magnet motor can be equipped with an air-cooling module on the rear side of the housing, depending on the specific application scenario and actual heat dissipation requirements. The heat dissipation motor in the air-cooling module drives the fan blades to blow air into the heat dissipation cavity, which quickly blows the heat out of the heat dissipation cavity, thereby effectively improving its heat dissipation effect and reducing the heat dissipation pressure of the liquid cooling heat exchange module.

[0019] 3. The liquid cooling structure of this permanent magnet motor can absorb more heat in a short time by making the coolant turbulent through the turbulent plate when the permanent magnet motor is under overload. Then the heat is transferred to the heat absorption block, thereby effectively preventing the permanent magnet motor from overheating.

[0020] All parts of the device not described herein are the same as or can be implemented using existing technologies. This invention effectively prevents the permanent magnet motor from overheating by absorbing heat rapidly generated in a short time through the setting of heat-absorbing blocks. At the same time, it can make reasonable use of liquid cooling heat exchange mechanism. Within a suitable range, there is no need to set up a liquid cooling heat exchange mechanism with excessive power, thereby reducing the cost of use and the volume occupied by the equipment. It also effectively improves the heat dissipation efficiency and heat dissipation effect of the permanent magnet motor. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 ;

[0024] Figure 4This is a cross-sectional view of the present invention. Figure 1 ;

[0025] Figure 5 This is a cross-sectional view of the present invention. Figure 2 ;

[0026] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0027] Figure 7 This is a cross-sectional view of the present invention. Figure 3 ;

[0028] Figure 8 This is a schematic diagram of the serpentine heat pipe and turbulence plate in this invention;

[0029] Figure 9 This is a cross-sectional schematic diagram of the serpentine heat pipe and turbulence plate in this invention.

[0030] In the diagram: 1. Shell; 101. Annular heat dissipation fins; 102. Through hole; 103. Horizontal heat dissipation fins; 104. First fixing plate; 105. Second fixing plate; 106. Air inlet slot; 107. Air-cooled module; 108. Cooling motor; 109. Fan blades; 110. Connecting screws; 111. Heat dissipation cavity; 2. Energy storage box; 201. Partition plate; 202. Heat absorption block; 203. Circular hole; 204. Arc-shaped connecting plate; 205. 1. Heat dissipation tank; 206. First temperature sensor; 3. Serpentine heat dissipation pipe; 301. Bending section; 302. Return pipe; 303. First solenoid valve; 304. Second solenoid valve; 305. Spiral groove; 306. Turbulence plate; 4. Transfer box; 401. Inlet pipe; 402. Outlet pipe; 403. Electric telescopic rod; 404. Controller; 405. Second temperature sensor; 5. Stator; 501. Rotor; 502. Shaft. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Example 1: Refer to Figures 1-9A liquid cooling structure for a permanent magnet motor includes: a housing 1; a serpentine heat sink 3 disposed on the housing 1, the serpentine heat sink 3 having multiple bends 301; and transfer boxes 4 symmetrically fixedly connected to the housing 1. The liquid inlet end of the serpentine heat sink 3 is connected to one of the transfer boxes 4, and the liquid outlet end of the serpentine heat sink 3 is connected to the other transfer box 4. The transfer box 4 connected to the liquid inlet end of the serpentine heat sink 3 is provided with a liquid inlet pipe 401, and the other transfer box 4 is provided with a liquid outlet pipe 401. 2; Multiple energy storage boxes 2 are arranged in a circular pattern on the outside of the housing 1; a heat absorption block 202 is fixedly installed inside the energy storage box 2; a return pipe 302 is symmetrically arranged between the energy storage box 2 and the bend 301; a first temperature sensor 206 is installed inside the energy storage box 2; a second temperature sensor 405 is installed on the housing 1; a first solenoid valve 303 is installed inside the bend 301; a second solenoid valve 304 is installed inside the return pipe 302; and a controller 404 is fixedly installed on one of the transfer boxes 4.

[0033] Among them, the energy storage box 2 can be made of a material with a certain heat insulation capacity.

[0034] When the permanent magnet motor is in use, it is connected to the inlet pipe 401 and outlet pipe 402 through an external liquid cooling heat exchange mechanism to ensure the cooling of the coolant in the serpentine heat dissipation pipe 3. The coolant in the serpentine heat dissipation pipe 3 cools the housing 1. The housing 1 is used to conduct the heat generated by the permanent magnet motor. When the permanent magnet motor is overloaded for a short period of time, the permanent magnet motor heats up faster. At this time, the second temperature sensor 405 detects that the temperature of the housing 1 is higher than the set value. The controller 404 controls the first solenoid valve 303 to close and controls the two second solenoid valves 304 to open. The controller 404 also controls the external liquid cooling heat exchange mechanism to be in a high-power working state. The coolant that has just absorbed a large amount of heat from the housing 1 enters the energy storage box 2 for circulation. The heat absorption block 202 in the energy storage box 2 absorbs some of the heat, keeping the heat of the coolant within the heat dissipation capacity range of the liquid cooling heat exchange mechanism. Then, the heat is dissipated through the liquid cooling heat exchange mechanism, thereby effectively preventing the permanent magnet motor from overheating and being damaged due to insufficient heat dissipation capacity of the liquid cooling heat exchange mechanism.

[0035] When the permanent magnet motor is not under overload, the heating rate of the permanent magnet motor returns to the normal range. The controller 404 acquires data from the first temperature sensor 206 and the second temperature sensor 405 in real time, and the controller 404 always controls the liquid cooling heat exchange mechanism to be in a high-power state. When the temperature in the energy storage box 2 reaches the set value 2, the controller 404 controls the liquid cooling heat exchange mechanism to return to normal working state, closes the second solenoid valve 304, and opens the first solenoid valve 303, so that the coolant flows only from the serpentine heat dissipation pipe 3.

[0036] By setting up heat absorption blocks 202 to absorb the heat that rises rapidly in a short time, the overheating of the permanent magnet motor can be effectively prevented. At the same time, liquid cooling heat exchange mechanism can be used reasonably. Within a suitable range, there is no need to set up a liquid cooling heat exchange mechanism with excessive power, thereby reducing the operating cost and the size of the equipment.

[0037] Example 2: Refer to Figures 1-9 A liquid cooling structure for a permanent magnet motor is basically the same as in Embodiment 1. Further, a first fixing plate 104 is provided on one side of the housing 1, and a second fixing plate 105 is provided on the side of the housing 1 away from the first fixing plate 104. An arc-shaped connecting plate 204 is fixedly connected between two adjacent energy storage boxes 2. Multiple heat dissipation grooves 205 are provided on the arc-shaped connecting plate 204. A heat dissipation cavity 111 is provided between the arc-shaped connecting plate 204 and the housing 1. Multiple air inlet grooves 106 are provided in a circular pattern on the second fixing plate 105.

[0038] A cooling module 107 is detachably connected to the second fixing plate 105. Multiple connecting screws 110 are provided between the cooling module 107 and the second fixing plate 105. A cooling motor 108 is fixedly connected inside the cooling module 107. A fan blade 109 is fixedly connected to the output end of the cooling motor 108.

[0039] In practical implementation, depending on the specific usage scenario and actual heat dissipation requirements, an air-cooling module 107 can be set on the rear side of the housing 1. The heat dissipation motor 108 in the air-cooling module 107 drives the fan blades 109 to blow air into the heat dissipation cavity 111, which quickly blows the heat in the heat dissipation cavity 111 outward, thereby effectively improving its heat dissipation effect and reducing the heat dissipation pressure of the liquid cooling heat exchange module.

[0040] Example 3: Reference Figures 1-9 A liquid cooling structure for a permanent magnet motor is basically the same as that in Embodiment 1. Furthermore, a partition 201 is provided inside the energy storage box 2, and two heat absorption blocks 202 are provided. The two heat absorption blocks 202 are respectively provided on both sides of the partition 201, and a round hole 203 is provided on the side of the partition 201 away from the return pipe 302.

[0041] By setting a partition 201 inside the energy storage box 2, the energy storage box 2 is configured into two cavities, and the coolant circulates inside the energy storage box 2 and then flows out again from the same direction before entering the serpentine heat dissipation pipe 3, thereby ensuring that the flow direction of the serpentine heat dissipation pipe 3 is consistent and improving the heat dissipation effect on the permanent magnet motor.

[0042] Example 4: Refer to Figures 1-9 A liquid cooling structure for a permanent magnet motor is basically the same as that in Embodiment 1. Furthermore, multiple annular heat dissipation fins 101 are fixedly connected at equal intervals on the housing 1, and multiple through holes 102 are opened on the annular heat dissipation fins 101.

[0043] The heat transfer effect on the housing 1 is achieved by multiple annular heat dissipation fins 101, and then the heat is conducted to the coolant in the serpentine heat dissipation pipe 3 through the multiple annular heat dissipation fins 101. At the same time, the multiple annular heat dissipation fins 101 have a certain self-heating capacity, which can improve the heat dissipation effect on the permanent magnet motor.

[0044] Multiple annular heat dissipation fins 101 are fixedly connected to multiple transverse heat dissipation fins 103, and the transverse heat dissipation fins 103 are matched with the air inlet slots 106.

[0045] A horizontal heat dissipation fin 103 is provided on the annular heat dissipation fin 101. When the air-cooling module 107 is used, the air blown out by the air-cooling module 107 blows over the two adjacent horizontal heat dissipation fins 103 with a certain directionality, so as to carry away the heat of the horizontal heat dissipation fins 103. The hot air in the heat dissipation cavity 111 is ejected from the heat dissipation slot 205.

[0046] Example 5: Refer to Figures 1-9 A liquid cooling structure for a permanent magnet motor is basically the same as that in Embodiment 1, but further, the serpentine heat pipe 3 is provided with multiple spiral grooves 305.

[0047] The coolant inside the serpentine heat pipe 3 has a certain swirling effect under the action of the spiral groove 305, which can generate turbulence in the coolant inside the serpentine heat pipe 3, improve the heat exchange efficiency of the coolant, and thus effectively improve the heat dissipation effect on the permanent magnet motor.

[0048] Multiple turbulence plates 306 are fixedly connected inside the serpentine heat pipe 3, and the turbulence plates 306 are inclined and spirally arranged.

[0049] The coolant flowing inside the serpentine heat pipe 3 is blocked and generates turbulence after contacting the turbulence plate 306, which effectively improves the heat exchange efficiency between the coolant and the serpentine heat pipe 3, thereby effectively improving the cooling efficiency and cooling effect of the permanent magnet motor.

[0050] Reference Figure 9 The coolant flows from right to left, and the turbulence plate 306 tilts to the right.

[0051] When the permanent magnet motor is under overload, the turbulent flow plate 306 allows the coolant to absorb more heat in a short time by making it turbulent. Then, the heat is transferred to the heat absorption block 202, thereby effectively preventing the permanent magnet motor from overheating.

[0052] Example 6: Refer to Figures 1-9 A liquid cooling structure for a permanent magnet motor is basically the same as that in Embodiment 1, but further, an electric telescopic rod 403 is fixedly connected inside the transfer box 4.

[0053] In practical implementation, when the coolant in the serpentine heat exchange tube 3 is circulated and cooled by the liquid cooling heat exchange mechanism, the electric telescopic rod 403 is intermittently started by the controller 404. The controller 404 controls the electric telescopic rod 403 near the inlet pipe 401 to extend quickly, and at the same time controls the electric telescopic rod 403 near the outlet pipe 402 to retract quickly. The extension and retraction speeds of the two electric telescopic rods 403 are the same, so that the coolant in the serpentine heat exchange tube 3 will have a certain acceleration flow in a short time. The fast flow of coolant causes the turbulence plate 306 to fluctuate, thereby effectively improving the turbulence effect of the coolant in the serpentine heat exchange tube 3, and thus effectively improving the cooling effect and cooling efficiency of the permanent magnet motor.

[0054] After the electric telescopic rod 403 near the outlet pipe 402 completes one extension, the controller 404 controls the electric telescopic rod 403 near the inlet pipe 401 to slowly retract, and at the same time controls the electric telescopic rod 403 near the outlet pipe 402 to slowly extend, and so on in a cycle.

[0055] When the permanent magnet motor is under overload, the controller 404 controls the electric telescopic rod 403 to increase its extension frequency, thereby improving its turbulence capacity and thus improving the heat exchange efficiency of the permanent magnet motor. By adjusting the extension frequency of the electric telescopic rod 403 under appropriate working conditions, its energy consumption can be reduced.

[0056] Example 7: Refer to Figure 1 and Figure 4 A permanent magnet motor includes a liquid cooling structure for the permanent magnet motor and a stator 5 disposed in a housing 1. A rotor 501 is disposed in the stator 5, and a rotating shaft 502 is fixedly connected to one end of the rotor 501.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A liquid cooling structure for a permanent magnet motor, comprising: The housing (1) is characterized in that it further comprises: A serpentine heat sink (3) is provided on the housing (1), and the serpentine heat sink (3) is provided with multiple bends (301). The transfer box (4) is symmetrically fixedly connected to the shell (1). The liquid inlet end of the serpentine heat dissipation pipe (3) is connected to one of the transfer boxes (4), and the liquid outlet end of the serpentine heat dissipation pipe (3) is connected to the other transfer box (4). The transfer box (4) connected to the liquid inlet end of the serpentine heat dissipation pipe (3) is provided with a liquid inlet pipe (401), and the other transfer box (4) is provided with a liquid outlet pipe (402). Multiple energy storage boxes (2) are arranged in a circular pattern on the outside of the housing (1); A heat-absorbing block (202) is fixedly installed inside the energy storage box (2); The return pipe (302) is symmetrically arranged between the energy storage box (2) and the bend (301); A first temperature sensor (206) is disposed inside the energy storage box (2); A second temperature sensor (405) is disposed on the housing (1); A first solenoid valve (303) is disposed within the bent portion (301); The second solenoid valve (304) is disposed inside the return pipe (302); The controller (404) is fixedly mounted on one of the transfer boxes (4); The energy storage box (2) is provided with a partition (201), and there are two heat absorption blocks (202). The two heat absorption blocks (202) are respectively provided on both sides of the partition (201). A round hole (203) is provided on the side of the partition (201) away from the return pipe (302). The serpentine heat pipe (3) is provided with multiple spiral grooves (305).

2. The liquid cooling structure for a permanent magnet motor according to claim 1, characterized in that, A first fixing plate (104) is provided on one side of the housing (1), and a second fixing plate (105) is provided on the side of the housing (1) away from the first fixing plate (104). An arc-shaped connecting plate (204) is fixedly connected between two adjacent energy storage boxes (2). Multiple heat dissipation slots (205) are provided on the arc-shaped connecting plate (204). A heat dissipation cavity (111) is provided between the arc-shaped connecting plate (204) and the housing (1). Multiple air inlet slots (106) are provided in a circular pattern on the second fixing plate (105).

3. The liquid cooling structure for a permanent magnet motor according to claim 2, characterized in that, A cooling module (107) is detachably connected to the second fixing plate (105). A plurality of connecting screws (110) are provided between the cooling module (107) and the second fixing plate (105). A heat dissipation motor (108) is fixedly connected inside the cooling module (107). A fan blade (109) is fixedly connected to the output end of the heat dissipation motor (108).

4. The liquid cooling structure for a permanent magnet motor according to claim 2, characterized in that, The housing (1) has multiple annular heat dissipation fins (101) fixedly connected at equal intervals, and the annular heat dissipation fins (101) have multiple through holes (102).

5. The liquid cooling structure for a permanent magnet motor according to claim 4, characterized in that, Multiple transverse heat dissipation fins (103) are fixedly connected between the multiple annular heat dissipation fins (101), and the transverse heat dissipation fins (103) are matched with the air inlet groove (106).

6. The liquid cooling structure for a permanent magnet motor according to claim 1, characterized in that, The serpentine heat pipe (3) is fixedly connected with multiple turbulence plates (306), and the turbulence plates (306) are inclined and spirally arranged.

7. The liquid cooling structure for a permanent magnet motor according to claim 6, characterized in that, An electric telescopic rod (403) is fixedly connected inside the transfer box (4).

8. A permanent magnet motor, comprising the liquid cooling structure for a permanent magnet motor as described in any one of claims 1-7, characterized in that, It also includes a stator (5) disposed in the housing (1), a rotor (501) disposed in the stator (5), and a rotating shaft (502) fixedly connected to one end of the rotor (501).

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