Permanent magnet motor side air cooling heat dissipation structure

Abstract

The application provides a side air cooling heat dissipation structure of a permanent magnet motor, a wind tube is sleeved outside a motor body, a top end of the wind tube is fixed on an axle extension end cover of the motor body, an inner wall of the wind tube and an outer wall of the motor body are arranged at intervals to form an air duct, opposite sides of the wind tube are formed with an air inlet and an air outlet; a fan is arranged on one side of the motor body, an output end of the fan is in sealing connection with the air inlet; the axial channelizing ribs are annular, the axial channelizing ribs are fixed on the outer wall of the motor body, and the plurality of axial channelizing ribs separate the air duct into a plurality of sub channels. The application adopts a side fan to send air in a radial direction, after the air duct is separated by the axial channelizing ribs, the airflow forms more uniform turbulent flow in the sub channels, the heat exchange area with the outer wall of the motor is increased, the convection heat dissipation is strengthened, the motor temperature rise is effectively reduced, the service life of the motor body is increased, and the fan is connected with the motor body in a side manner, thereby avoiding the space occupation problem caused by the axial extension of the traditional axial flow fan.

Description

Technical Field

[0001] This application belongs to the field of permanent magnet motor technology, and more specifically, relates to a side air-cooled heat dissipation structure for a permanent magnet motor. Background Technology

[0002] A permanent magnet motor is a type of motor in which the rotor uses permanent magnets instead of windings, and the magnetic field is generated by the excitation of permanent magnets. It mainly consists of components such as a stator, a rotor, and end covers. The stator includes a stator core and stator windings, with the stator windings embedded in the stator core, generating a magnetic field when energized.

[0003] In existing technologies, motors mostly use axial fans, which deliver air axially. This results in a long airflow path and low heat dissipation efficiency. On the one hand, the coaxial design of the fan and motor increases the axial dimension, occupying a large space. On the other hand, the enclosed motor casing hinders heat dissipation, and excessive temperature rise can lead to demagnetization of the magnets or aging of the windings. Utility Model Content

[0004] The purpose of this application is to provide a side-cooled heat dissipation structure for a permanent magnet motor, which cools the motor by side-blowing air, thereby improving the service life of the motor and reducing the overall size of the motor and the heat dissipation structure.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a side-cooled heat dissipation structure for a permanent magnet motor is provided, including a duct, a fan, and multiple axial dividing ribs. The duct is cylindrical and sleeved on the outside of the motor body. The top end of the duct is fixed to the end cap of the shaft extension end of the motor body. An air duct is formed between the inner wall of the duct and the outer wall of the motor body at intervals. An air inlet and an air outlet are formed on opposite sides of the duct. The fan is located on one side of the motor body, and the output end of the fan is sealed to the air inlet. The axial dividing ribs are annular and fixed to the outer wall of the motor body. Multiple axial dividing ribs are arranged at intervals along the axial direction of the motor body. The outer wall of the axial dividing ribs abuts against the inner wall of the duct. The multiple axial dividing ribs divide the air duct into multiple sub-channels. The axial dividing rib furthest from the end cap of the shaft extension end of the motor body is located near the end of the duct.

[0006] In one possible implementation, the output end of the fan is provided with a first connecting ear, the air inlet of the air duct is provided with a second connecting ear, one end of the funnel-shaped air guide shroud is provided with a third connecting ear, and the other end of the air guide shroud is provided with a fourth connecting ear. The first connecting ear and the third connecting ear abut against each other and are fixed by bolts, and the second connecting ear and the fourth connecting ear abut against each other and are fixed by bolts.

[0007] In one possible implementation, a first sealing ring is provided between the first connecting ear and the third connecting ear, and a second sealing ring is provided between the second connecting ear and the fourth connecting ear.

[0008] In one possible implementation, a plurality of heat sinks are provided on the outer wall of the motor body, and the heat sinks are evenly arranged along the axial direction of the motor body.

[0009] In one possible implementation, the heat sink is annular, sleeved on the motor body, and welded to the side wall of the motor body. The outer diameter of the heat sink is smaller than the outer diameter of the axial dividing rib.

[0010] In one possible implementation, the fan is a centrifugal fan.

[0011] In one possible implementation, the sidewall of the motor body is provided with radial dividing ribs that extend radially along the motor body and are arranged parallel to the air inlet direction. The outer side of the radial dividing ribs abuts against the air guide shroud to divide the air inlet into a left inlet and a right inlet.

[0012] In one possible implementation, the radial ribs are welded and fixed to the side wall of the motor body.

[0013] In one possible implementation, the end cover of the shaft extension of the motor body is provided with a plurality of heat dissipation fins, which are evenly arranged along the circumference of the end cover.

[0014] In one possible implementation, the heat dissipation fins are welded and fixed to the end cap of the shaft extension.

[0015] The beneficial effects of the side-mounted air-cooled heat dissipation structure for permanent magnet motors provided in this application are as follows: Compared with the prior art, this application uses a side-mounted fan to deliver air radially. The airflow cuts into the air inlet of the fan duct and passes laterally through the outer wall of the motor via a secondary channel. After the air duct is divided by axial ribs, the airflow forms more uniform turbulence within the secondary channel, increasing the heat exchange area with the outer wall of the motor, enhancing convective heat dissipation, and effectively reducing the motor temperature rise. The fan is side-mounted and connected to the motor body, rather than being coaxially designed, avoiding the space occupation problem caused by the axial extension of traditional axial fans, making it suitable for compact equipment installation. The axial ribs are arranged at intervals along the motor axis, with the farthest rib close to the end of the fan duct, ensuring that the airflow covers the entire length of the motor, avoiding heat dissipation blind spots, further improving heat dissipation efficiency, and increasing the service life of the motor body. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the permanent magnet motor side air-cooled heat dissipation structure provided in an embodiment of this application from one angle; Figure 2 A schematic diagram of the air-cooled heat dissipation structure on the side of the permanent magnet motor provided in an embodiment of this application from another angle; Figure 3 A front view schematic diagram of the air-cooled heat dissipation structure on the side of the permanent magnet motor provided in an embodiment of this application; Figure 4 for Figure 3 Enlarged view of part A; Figure 5 A radial cross-sectional view of the air-cooled heat dissipation structure on the side of the permanent magnet motor provided in the embodiments of this application; Figure 6 An axial cross-sectional view of the air-cooled heat dissipation structure on the side of the permanent magnet motor provided in the embodiments of this application; Figure 7 This is a schematic diagram of the airflow direction within the air-cooled heat dissipation structure on the side of the permanent magnet motor provided in an embodiment of this application.

[0018] The labels for the attached figures are as follows: 1. Air duct; 2. Fan; 3. Axial dividing ribs; 4. Air guide shroud; 101. Air inlet; 102. Air outlet; 103. Air duct; 104. Second connecting lug; 105. Heat sink; 106. Radial ribs; 107. Shaft extension end cap; 108. Heat sink fins; 201. First connecting ear; 401. Third connecting ear; 402. Fourth connecting ear. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be further noted that the accompanying drawings and embodiments of this application mainly describe the concept of this application. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this application, they can implement the above-mentioned specific forms and arrangements in a well-known manner.

[0021] When a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] The terms “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0024] The air-cooled heat dissipation structure of the permanent magnet motor side provided in this application will now be described.

[0025] Please refer to the following: Figures 1 to 7The permanent magnet motor side air-cooled heat dissipation structure includes a duct 1, a fan 2, and multiple axial dividing ribs 3. The duct 1 is cylindrical and is sleeved on the outside of the motor body. The top of the duct 1 is fixed to the end cap 107 of the motor body's shaft extension. An air duct 103 is formed between the inner wall of the duct 1 and the outer wall of the motor body. An air inlet 101 and an air outlet 102 are formed on opposite sides of the duct 1. The fan 2 is located on one side of the motor body, and the output end of the fan 2 is sealed to the air inlet 101. The axial dividing ribs 3 are annular and are fixed to the outer wall of the motor body. Multiple axial dividing ribs 3 are arranged at intervals along the axial direction of the motor body. The outer wall of the axial dividing ribs 3 abuts against the inner wall of the duct 1. The multiple axial dividing ribs 3 divide the air duct 103 into multiple sub-ducts. The axial dividing rib 3 furthest from the end cap 107 of the motor body is located near the end of the duct 1.

[0026] The beneficial effects of the side-mounted air-cooled heat dissipation structure for permanent magnet motors provided in this embodiment are as follows: Compared with the prior art, the side-mounted air-cooled heat dissipation structure for permanent magnet motors provided in this embodiment uses a side-mounted fan 2 to deliver air radially. The airflow cuts into the air inlet 101 of the air duct 1 and passes laterally through the outer wall of the motor via a sub-channel. After the air duct 103 is separated by the axial dividing ribs 3, the airflow forms a more uniform turbulence within the sub-channel, increasing the heat exchange area with the outer wall of the motor, enhancing convective heat dissipation, and effectively reducing the motor temperature rise. The fan 2 is side-mounted and connected to the motor body, rather than being coaxially designed, avoiding the space occupation problem caused by the axial extension of traditional axial fans, making it suitable for compact equipment installation. The axial dividing ribs 3 are arranged at intervals along the motor axis, with the farthest dividing rib close to the end of the air duct 1, ensuring that the airflow covers the entire length of the motor, avoiding heat dissipation blind spots, further improving heat dissipation efficiency, and increasing the service life of the motor body.

[0027] Combination Figure 3 and Figure 4 As shown, the output end of the fan 2 is provided with a first connecting ear 201, the air inlet 101 of the air duct 1 is provided with a second connecting ear 104, one end of the funnel-shaped air guide shroud 4 is provided with a third connecting ear 401, and the other end of the air guide shroud 4 is provided with a fourth connecting ear 402. The first connecting ear 201 and the third connecting ear 401 abut against each other and are fixed by bolts, and the second connecting ear 104 and the fourth connecting ear 402 abut against each other and are fixed by bolts.

[0028] The funnel-shaped air guide shroud 4 concentrates the airflow output from the fan 2 and directs it towards the air inlet 101, reducing airflow diffusion loss, lowering air pressure loss, and ensuring stable airflow velocity within the duct 103. The bolted connection allows for quick disassembly of the fan 2, air guide shroud 4, and shroud without disassembling the motor body, minimizing maintenance time and making it suitable for scenarios requiring frequent cleaning of the duct 103. Furthermore, different specifications of the fan 2 and air guide shroud 4 can be replaced with different power motors, offering high versatility and reducing production costs.

[0029] As a preferred technical solution, a first sealing ring is provided between the first connecting ear 201 and the third connecting ear 401, and a second sealing ring is provided between the second connecting ear 104 and the fourth connecting ear 402.

[0030] The sealing ring is made of heat-resistant rubber to prevent airflow leakage at the connection point, avoiding a decrease in heat dissipation efficiency due to airflow loss. The sealed design creates a semi-enclosed structure for the airflow system, reducing dust and moisture entering the motor and extending the winding insulation life. It is suitable for harsh working conditions such as humidity and dust.

[0031] like Figure 2 and Figure 6 As shown, multiple heat sinks 105 are provided on the outer wall of the motor body, and the heat sinks 105 are evenly arranged along the axial direction of the motor body.

[0032] The annular heat sink 105 is evenly arranged along the axial direction, which increases the heat dissipation area of ​​the motor's outer wall, thereby improving heat conduction efficiency and facilitating heat dissipation of the motor body. The heat sink 105 is welded and fixed to the motor body, avoiding the contact thermal resistance of traditional bolted connections and ensuring that heat is quickly conducted to the airflow in the air duct 103.

[0033] Specifically, the heat sink 105 is annular and is fitted onto the motor body. The heat sink 105 is welded and fixed to the side wall of the motor body. The outer diameter of the heat sink 105 is smaller than the outer diameter of the axial dividing rib 3.

[0034] The outer diameter of the heat sink 105 is smaller than that of the axial channel rib 3, so that the airflow has to pass through the gap of the heat sink 105 when passing through the channel, forming a secondary disturbance and further enhancing the convective heat transfer.

[0035] In this embodiment, the fan 2 is a centrifugal fan. The radial air pressure generated by the centrifugal fan 2 can reach 2-3 times that of an axial fan, and it has a stronger ability to overcome the resistance of the air duct 103, ensuring that the airflow penetrates the gap of the heat sink 105 and covers the entire surface of the motor.

[0036] Centrifugal fans are less affected by duct resistance and can still maintain effective airflow even when dust accumulates or the duct 103 is partially blocked. Their heat dissipation stability is better than that of axial fans.

[0037] Centrifugal fan 2 is radially mounted, which shortens its axial length. Combined with its side-mounted design, this reduces the overall size of the motor body and cooling system. Furthermore, centrifugal fan 2 produces lower airflow noise than axial fans, meeting industrial noise reduction standards.

[0038] like Figure 5 and Figure 7As shown, a radial dividing rib 106 is provided on the side wall of the motor body. The radial dividing rib 106 extends radially along the motor body. The radial dividing rib 106 is arranged parallel to the air inlet direction, and the outer side of the radial dividing rib 106 abuts against the air guide shroud 4 to divide the air inlet 101 into a left inlet and a right inlet.

[0039] The dividing ribs divide the air inlet 101 into symmetrical double inlets, so that the airflow flows evenly to both sides of the motor, avoiding insufficient local airflow caused by single-sided air intake, which is especially suitable for motors with a large length-to-diameter ratio.

[0040] The radial dividing rib 106 abuts against the inner wall of the air guide shroud 4, guiding the airflow in a "U" shape through the air duct 103, increasing the residence time of the airflow on the outer wall of the motor, and making heat exchange more efficient.

[0041] Specifically, the radial guide ribs 106 are welded and fixed to the side wall of the motor body. The welded and fixed radial guide ribs 106 can help support the wind shroud, prevent the wind guide shroud 4 from deforming under high wind speeds, and improve the reliability of the system.

[0042] Combination Figure 1 and Figure 2 As shown, the end cover 107 of the shaft extension end of the motor body is provided with multiple heat dissipation fins 108, which are evenly arranged along the circumference of the end cover 107. The end cover 107 is the area where the heat of the motor is concentrated. The heat dissipation fins 108 can increase the heat dissipation area of ​​the end cover, avoid the end cover from overheating and causing the bearing grease to fail, and at the same time prevent the magnets near the end cover from demagnetizing.

[0043] Finally, the heat dissipation fins 108 are welded and fixed to the end cover 107 of the shaft extension. The fins are evenly arranged circumferentially, forming a three-dimensional heat dissipation network with the heat dissipation fins 105 on the outer wall of the motor, making the temperature field distribution of the whole machine more uniform and meeting the requirements for improving the energy efficiency level of the motor. The welding and fixing method facilitates the installation of the heat dissipation fins 108 and makes the installation more stable.

[0044] In this embodiment, the junction box of the motor body extends through the air outlet 102 of the air duct 1, which facilitates connection with the outside.

[0045] This utility model's side-cooled heat dissipation structure for permanent magnet motors systematically solves the problems of low heat dissipation efficiency, large size, and high temperature rise of traditional permanent magnet motors through a design of "103-partitioned air duct + side air supply + multi-dimensional heat dissipation enhancement". Compared with existing technologies, it has higher overall heat dissipation efficiency, smaller axial dimensions, and lower risk of magnet demagnetization. It also features convenient installation and maintenance, adaptability to harsh working conditions, and can be widely used in scenarios with high requirements for motor size and reliability.

[0046] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A side-cooled heat dissipation structure for a permanent magnet motor, characterized in that, include: The air duct (1) is cylindrical and is sleeved on the outside of the motor body. The top end of the air duct (1) is fixed on the end cap (107) of the shaft extension of the motor body. The inner wall of the air duct (1) and the outer wall of the motor body are arranged at intervals to form an air duct (103). An air inlet (101) and an air outlet (102) are formed on opposite sides of the air duct (1). A fan (2) is located on one side of the motor body, and the output end of the fan (2) is sealed to the air inlet (101); Multiple axial dividing ribs (3) are arranged in a ring shape. The axial dividing ribs (3) are fixed on the outer wall of the motor body and the multiple axial dividing ribs (3) are arranged at intervals along the axial direction of the motor body. The outer wall of the axial dividing ribs (3) abuts against the inner wall of the air duct (1). The multiple axial dividing ribs (3) divide the air duct (103) into multiple sub-ducts. The axial dividing rib (3) furthest from the shaft extension end cap (107) of the motor body is located near the end of the air duct (1).

2. The air-cooled heat dissipation structure for the permanent magnet motor side as described in claim 1, characterized in that: The output end of the fan (2) is provided with a first connecting ear (201), the air inlet (101) of the air duct (1) is provided with a second connecting ear (104), one end of the funnel-shaped air guide shroud (4) is provided with a third connecting ear (401), and the other end of the air guide shroud (4) is provided with a fourth connecting ear (402). The first connecting ear (201) and the third connecting ear (401) abut against each other and are fixed by bolts. The second connecting ear (104) and the fourth connecting ear (402) abut against each other and are fixed by bolts.

3. The air-cooled heat dissipation structure for the permanent magnet motor side as described in claim 2, characterized in that: A first sealing ring is provided between the first connecting ear (201) and the third connecting ear (401), and a second sealing ring is provided between the second connecting ear (104) and the fourth connecting ear (402).

4. The air-cooled heat dissipation structure for the permanent magnet motor side as described in claim 1, characterized in that: The outer wall of the motor body is provided with a plurality of heat sinks (105), which are evenly arranged along the axial direction of the motor body.

5. The air-cooled heat dissipation structure for the permanent magnet motor side as described in claim 4, characterized in that: The heat sink (105) is annular and is sleeved on the motor body. The heat sink (105) is welded and fixed to the side wall of the motor body. The outer diameter of the heat sink (105) is smaller than the outer diameter of the axial dividing rib (3).

6. The air-cooled heat dissipation structure for the permanent magnet motor side as described in claim 1, characterized in that: The fan (2) is a centrifugal fan.

7. The air-cooled heat dissipation structure for the permanent magnet motor side as described in claim 1, characterized in that: The motor body has a radial dividing rib (106) on its side wall. The radial dividing rib (106) extends radially along the motor body. The radial dividing rib (106) is arranged parallel to the air inlet direction and divides the air inlet (101) into a left inlet and a right inlet.

8. The air-cooled heat dissipation structure for the permanent magnet motor side as described in claim 7, characterized in that: The radial dividing rib (106) is welded and fixed to the side wall of the motor body.

9. The air-cooled heat dissipation structure for the permanent magnet motor side as described in claim 1, characterized in that: The motor body has a plurality of heat dissipation fins (108) on the shaft extension end cover (107), and the heat dissipation fins (108) are evenly arranged along the circumference of the shaft extension end cover (107).

10. The air-cooled heat dissipation structure for the permanent magnet motor side as described in claim 9, characterized in that: The heat dissipation fins (108) are welded and fixed to the end cap (107) of the shaft extension.

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