Permanent magnet motor rotor with permanent magnet layered structure

Abstract

The utility model belongs to the technical field of permanent magnet motors, and particularly relates to a permanent magnet motor rotor with a permanent magnet layered structure, which comprises a motor outer shell, air holes are formed in two ends of the motor outer shell, and dust screens are arranged in the air holes; the rotor assembly is arranged in the motor outer shell; the heat dissipation mechanism is arranged on the motor outer shell and used for conducting heat dissipation on the interior of the motor; wherein the heat dissipation mechanism comprises cooling parts, the cooling parts are arranged on the outer surface of the motor outer shell in an array distribution mode, one end of each cooling part is provided with an air inlet part, and one end of each cooling part is provided with an air conveying part used for conveying air. According to the utility model, a dual-cooling heat dissipation mechanism can be formed. According to the design, heat in the motor outer shell is effectively dissipated, heat accumulation is avoided, the heat dissipation effect is remarkably improved, and the running stability of the motor is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and specifically relates to a permanent magnet motor rotor with a permanent magnet layered structure. Background Art

[0002] A motor (commonly known as a "motor") is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction.

[0003] With the continuous advancement of permanent magnet motor technology, the design standards for motor rotors have also been improved. Traditional permanent magnet motor rotors generally use permanent magnets of a single structure, which has certain limitations in terms of magnetic field stability. At the same time, when the motor rotor is running at high load or high speed for a long time, it will generate significant heat. This heat mainly comes from current loss, friction loss, and magnetic energy conversion loss inside the motor. Given the limitations of the internal space of the motor rotor and the lack of heat dissipation channels in traditional structural designs, this heat is often difficult to dissipate effectively, resulting in serious heat accumulation problems. Heat accumulation not only causes the temperature of the motor rotor to rise, but may also have a negative impact on the performance and reliability of the motor. Specifically, a high temperature environment will reduce the performance of the motor, increase the resistance of the motor winding, weaken the magnetic field strength, and may even cause insulation aging or burning, which will cause motor failure or shorten its service life. In addition, excessively high temperatures will also reduce the efficiency and power output of the motor, increase power loss, and thus affect the working efficiency of the motor. Utility Model Content

[0004] The purpose of this utility model is to provide a permanent magnet motor rotor with a permanent magnet layered structure, which can form a double cooling heat dissipation mechanism. This design effectively dissipates the heat in the motor housing, avoids the accumulation of heat, significantly improves the heat dissipation effect, and ensures the stability of the motor operation.

[0005] The technical solutions adopted in this utility are as follows:

[0006] A permanent magnet motor rotor with a permanent magnet layered structure, comprising:

[0007] The motor housing has ventilation holes at both ends and dustproof nets are arranged in the ventilation holes;

[0008] A rotor assembly, wherein the rotor assembly is disposed in a motor housing;

[0009] A heat dissipation mechanism, which is arranged on the outer shell of the motor and is used to dissipate heat inside the motor;

[0010] Among them, the heat dissipation mechanism includes a cooling part, which is arranged in an array distribution on the outer surface of the motor housing, and is used to cool and dehumidify the air entering the motor. One end of the cooling part is provided with an air intake part for filtering the inhaled air, and one end of the cooling part is provided with a gas transmission part for transporting the gas.

[0011] In a preferred embodiment, the rotor assembly includes a rotating shaft, which is rotatably arranged on the motor housing, and a cavity is formed on the rotating shaft. The right end of the output shaft of the rotating shaft is fixedly connected to a rotor fan and a turbine blade, and air outlet holes are formed in a circular arrangement on both left and right ends of the rotating shaft, and a front bearing and a rear bearing are respectively formed on the left and right ends of the rotating shaft, and the outer wall of the rotating shaft is arranged on the rotor core, and a through groove is formed in a circular arrangement on the rotor core.

[0012] In a preferred embodiment, the cooling part includes an outer shell, which is fixedly connected to the outer shell of the motor, and the front and rear sides of the middle shell are connected to water pipes in an array, and the other end of the water pipe is connected to the adjacent shell, and the front and rear ends of the shell are fixedly connected to drainage pipes, and the lower end of the drainage pipe is provided with a sealing plug, a semiconductor refrigeration plate is installed on the shell, and the inner cavity of the shell is staggeredly connected to moisture absorption plates.

[0013] In a preferred embodiment, the air intake part includes an air intake pipe, which is fixedly connected to the outer shell, and a filter cartridge is detachably connected to the air intake pipe, a movable groove is provided on the filter cartridge, a locking rod is inserted into one end of the movable groove, a compression spring is fixedly connected between the locking rod and the movable groove, a filter screen is fixedly connected to the inner wall of the filter cartridge, a sliding groove is provided on the inner wall of the air intake pipe, and a locking hole is provided at the bottom end of the sliding groove.

[0014] In a preferred embodiment, the gas transmission part includes an L-shaped tube and a hollow ring, one end of the L-shaped tube is connected to the outer shell, and the other end is connected to the hollow ring. The hollow ring is fixedly connected to the motor outer shell by a support rod, and the right end of the rotating shaft extends into the hollow ring and is rotatably connected to the hollow ring.

[0015] In a preferred embodiment, the through slot is used to install a permanent magnet, and the through slot is divided into two layers, each layer having eight sections.

[0016] The technical effects achieved by this utility model are:

[0017] The practical through slot is divided into two layers, each layer is divided into eight sections, and permanent magnets are installed inside. This layered multi-section design makes the magnetic flux density of the permanent magnet more uniform and the magnetic field more stable, thereby improving the performance of the motor;

[0018] The utility model sets a heat dissipation structure, utilizes the blowing effect of the rotor fan to speed up the circulation speed of the air in the motor housing, and then combines the semiconductor cooling sheet to cool the other part of the incoming air, and the moisture absorption plate to further dehumidify the cooling air, and the cooled air is blown into the motor, forming a double cooling heat dissipation mechanism. This design effectively dissipates the heat in the motor housing, avoids the accumulation of heat, significantly improves the heat dissipation effect, and ensures the stability of the motor operation;

[0019] The practical filter cartridge is designed as a detachable structure and is equipped with a simple locking and unlocking mechanism. Simply press the lock rod inward, rotate the filter cartridge, and gently pull it out to disassemble the filter cartridge, making it easy to clean the filter screen or replace the entire filter cartridge. This design greatly simplifies the operation process, improves maintenance efficiency, and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 For this utility model Figure 1 Right view of;

[0022] Figure 3 This is a schematic diagram of the connection between the rotor assembly and the heat dissipation mechanism of the utility model;

[0023] Figure 4 For this utility model Figure 3 A front cross-sectional view of

[0024] Figure 5 This is a disassembled schematic diagram of the air intake pipe and filter cartridge of the utility model;

[0025] Figure 6 It is a front cross-sectional view of the filter cartridge of the utility model;

[0026] Figure 7 For this utility model Figure 6 An enlarged schematic diagram of part A shown in FIG.

[0027] Figure 8 It is a structural schematic diagram of the rotor assembly of the utility model.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Motor housing; 2. Rotor assembly; 3. Heat dissipation mechanism;

[0030] 31. Cooling unit; 32. Air intake unit; 33. Air delivery unit;

[0031] 201, rotating shaft; 202, cavity; 203, rotor fan; 204, turbine blade; 205, air outlet; 206, front bearing; 207, rear bearing; 208, rotor core; 209, through slot;

[0032] 311. Shell; 312. Water pipeline; 313. Drainage pipeline; 314. Semiconductor cooling sheet; 315. Moisture absorbing board;

[0033] 321, air inlet pipe; 322, filter cartridge; 323, movable slot; 324, locking rod; 325, compression spring; 326, filter screen; 327, sliding slot; 328, locking hole;

[0034] 331. Hollow ring; 332. L-shaped tube. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention, so the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present utility. The phrase "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0038] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the present embodiment in detail, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0039] Please refer to the attached Figure 1-Figure 8 As shown, the present invention provides a permanent magnet motor rotor with a permanent magnet layered structure, comprising:

[0040] The motor housing 1 has ventilation holes at both ends, and dustproof nets are arranged in the ventilation holes;

[0041] A rotor assembly 2, wherein the rotor assembly 2 is arranged in the motor housing 1;

[0042] The heat dissipation mechanism 3 is arranged on the motor housing 1 and is used to dissipate heat inside the motor;

[0043] Among them, the heat dissipation mechanism 3 includes a cooling part 31, which is arranged in an array distribution on the outer surface of the motor housing 1, and is used to cool and dehumidify the air entering the motor. One end of the cooling part 31 is provided with an air intake part 32 for filtering the inhaled air, and one end of the cooling part 31 is provided with a gas transmission part 33 for transporting the gas.

[0044] In this embodiment, the rotor assembly 2 operates stably in the motor outer shell 1, and the generated heat is effectively controlled by the heat dissipation mechanism 3, thereby ensuring that the motor operates efficiently for a long time.

[0045] The air inlet 32 ​​is located at one end of the cooling part 31, which can effectively prevent dust and particles from entering the motor and protect the internal components of the motor from pollution. The cooling part 31 is the core part of the heat dissipation mechanism 3, which can cool the inhaled air and remove moisture from the air.

[0046] The design of the air delivery part 33 enables the cooled and dehumidified air to be evenly delivered to the inside of the motor, thereby improving the heat dissipation efficiency.

[0047] The air hole design on the motor housing 1 not only ensures the ventilation and heat dissipation of the motor, but also the existence of the dustproof net effectively blocks the entry of external dust and impurities, maintaining a clean environment for the motor. This design not only increases the service life of the motor, but also ensures the stability and reliability of the motor operation.

[0048] In a preferred embodiment, please refer to Figure 4 and Figure 8 The rotor assembly 2 includes a rotating shaft 201, which is rotatably arranged on the motor housing 1. A cavity 202 is opened on the rotating shaft 201. The right end of the output shaft of the rotating shaft 201 is fixedly connected to a rotor fan 203 and a turbine blade 204. The left and right ends of the rotating shaft 201 are both provided with air outlet holes 205 in a circular distribution. The left and right ends of the rotating shaft 201 are respectively provided with a front bearing 206 and a rear bearing 207. The outer wall of the rotating shaft 201 is set on the rotor core 208. The rotor core 208 is provided with through grooves 209 in a circular distribution.

[0049] In this embodiment, during the operation of the motor, the rotating shaft 201 drives the rotor fan 203 to rotate synchronously with the turbine blades 204. The rotor fan 203 blows air into the motor housing 1 through its rotation, and the airflow formed enters from the right end of the motor housing 1, passes through the interior and is discharged from the left end. This process effectively speeds up the circulation speed of the air inside the motor housing 1 and significantly improves the heat dissipation effect.

[0050] Next, please refer to Figure 2-Figure 4 The cooling part 31 includes an outer shell 311, which is fixedly connected to the motor outer shell 1. The front and rear sides of the middle outer shell 311 are connected to water pipes 312 in an array, and the other end of the water pipe 312 is connected to the adjacent outer shell 311. The outer shells 311 at the front and rear ends are fixedly connected to drainage pipes 313, and the lower end of the drainage pipe 313 is provided with a sealing plug. A semiconductor refrigeration plate 314 is installed on the outer shell 311, and the inner cavity of the outer shell 311 is staggeredly connected to moisture absorption plates 315.

[0051] In this embodiment, the air entering the housing 311 contacts the cold end fins of the semiconductor refrigeration sheet 314, and the semiconductor refrigeration sheet 314 is used to cool the air. When the temperature of the humid air is reduced to the dew point temperature corresponding to its relative humidity, the gaseous water vapor therein will gradually turn into a liquid state, forming small droplets attached to the surface of the fins. As the droplets grow larger, when the gravity they are subjected to exceeds the adhesion of the fins, the water droplets will drip from the surface of the fins and be collected at the bottom of the housing 311. This process effectively reduces the moisture content in the air and reduces the potential erosion of moisture on the equipment. At the same time, it has the advantages of simple operation, low power consumption, resource conservation, and no pollution.

[0052] The condensed water collected at the bottom of the housing 311 will enter the housing 311 at the front and rear ends along the water delivery pipe 312, and finally be discharged into the drainage pipe 313. When drainage is required, the user only needs to unplug the sealing plug at the bottom of the drainage pipe 313 to drain the collected water.

[0053] The cooled air continues to move to the right and is further processed by the moisture absorbing plates 315 to absorb the remaining moisture in the air. The staggered distribution of the moisture absorbing plates 315 prolongs the path of air flow and increases the contact time between the air and the moisture absorbing plates 315, thereby ensuring an excellent moisture absorption effect.

[0054] Secondly, please also refer to Figure 3-Figure 7 The air intake part 32 includes an air intake pipe 321, which is fixedly connected to the housing 311. A filter cartridge 322 is detachably connected to the air intake pipe 321. The filter cartridge 322 is provided with a movable groove 323. A locking rod 324 is inserted at one end of the movable groove 323. A compression spring 325 is fixedly connected between the locking rod 324 and the movable groove 323. A filter screen 326 is fixedly connected to the inner wall of the filter cartridge 322. The inner wall of the air intake pipe 321 is provided with a filter screen 326. There is a sliding groove 327, and a lock hole 328 is provided at the bottom end of the sliding groove 327; wherein, the gas transmission part 33 includes an L-shaped tube 332 and a hollow ring 331, one end of the L-shaped tube 332 is connected to the outer shell 311, and the other end is connected to the hollow ring 331, the hollow ring 331 is fixedly connected to the motor outer shell 1 by a support rod, and the right end of the rotating shaft 201 extends into the hollow ring 331 and is rotatably connected to the hollow ring 331.

[0055] In this embodiment, the rotation of the turbine blades 204 will generate negative pressure inside the hollow ring 331, thereby inhaling outside air. The specific process is: the air is first filtered through the filter screen 326 on the filter cartridge 322, and then flows into the interior of the housing 311 along the air inlet pipe 321. Subsequently, the air that has been cooled and dehumidified will enter the hollow ring 331 along the L-shaped tube 332, further enter the cavity 202 on the rotating shaft 201, and finally be discharged through the air outlet 205 that is distributed in an annular shape and obliquely opened on the rotating shaft 201, so as to perform targeted cooling on the rotor assembly 2. This design ensures that the cold air can be blown directly to the rotor assembly 2, further improving the cooling effect. Through the double cooling heat dissipation mechanism, the heat in the motor housing 1 can be effectively dissipated, avoiding heat accumulation, thereby ensuring the stability of the motor operation.

[0056] The filter cartridge 322 is designed as a detachable structure and is installed on the air inlet pipe 321, which is convenient for cleaning the filter screen 326 or replacing the entire filter cartridge 322. When disassembling, just press the lock rod 324 inward to disengage it from the lock hole 328, and rotate the filter cartridge 322 counterclockwise 90 degrees, and then pull it out. When installing, also press the lock rod 324 inward to align it with the upper end of the sliding groove 327, then press the filter cartridge 322 downward to the bottom, and then rotate it clockwise 90 degrees. At this time, the lock rod 324 will lose its resistance, and the compression spring 325 will generate a reset force to push the lock rod 324 out of the movable groove 323 and insert it into the lock hole 328, thereby completing the fixation of the filter cartridge 322.

[0057] Next, please refer to Figure 8 The through slot 209 is used to install the permanent magnet, and the through slot 209 is divided into two layers, each layer has eight sections.

[0058] In this embodiment, the through slot 209 is designed in a layered multi-segment form, each layer is divided into eight segments, and each segment is equipped with a permanent magnet. This structural layout ensures that the magnetic flux density of the permanent magnet is more evenly distributed and the magnetic field is more stable, thereby significantly improving the overall performance of the motor.

[0059] The working principle of this utility is:

[0060] The through slot 209 is designed in a layered multi-segment form, with each layer divided into eight segments, each of which is equipped with a permanent magnet. This structural layout ensures that the magnetic flux density of the permanent magnet is more evenly distributed and the magnetic field is more stable, thereby significantly improving the overall performance of the motor.

[0061] During the operation of the motor, the rotating shaft 201 drives the rotor fan 203 to rotate synchronously with the turbine blades 204. The rotor fan 203 blows air into the motor housing 1 through its rotation, and the airflow formed enters from the right end of the motor housing 1, passes through the interior, and is discharged from the left end. This process effectively speeds up the circulation speed of the air inside the motor housing 1 and significantly improves the heat dissipation effect.

[0062] The rotation of the turbine blades 204 will generate negative pressure inside the hollow ring 331, thereby sucking in external air. The specific process is: the air is first filtered through the filter screen 326 on the filter cartridge 322, and then flows into the interior of the housing 311 along the air inlet pipe 321. The air entering the housing 311 contacts the cold end fins of the semiconductor refrigeration sheet 314, and the air is cooled by the semiconductor refrigeration sheet 314. When the temperature of the humid air is reduced to the dew point temperature corresponding to its relative humidity, the gaseous water vapor therein will gradually turn into a liquid state, forming small droplets attached to the surface of the fins. As the droplets grow larger, when the gravity they are subjected to exceeds the adhesion of the fins, the water droplets will drip from the surface of the fins and be collected at the bottom of the housing 311. This process effectively reduces the moisture content in the air and reduces the potential erosion of moisture on the equipment. At the same time, it has the advantages of simple operation, low power consumption, resource conservation, and no pollution.

[0063] The condensed water collected at the bottom of the housing 311 will enter the housing 311 at the front and rear ends along the water delivery pipe 312, and finally be discharged into the drainage pipe 313. When drainage is required, the user only needs to unplug the sealing plug at the bottom of the drainage pipe 313 to drain the collected water.

[0064] The cooled air continues to move to the right and is further processed by the moisture absorption plate 315 to absorb the residual moisture in the air. The staggered distribution of the moisture absorption plate 315 extends the air flow path and increases the contact time between the air and the moisture absorption plate 315, thereby ensuring an excellent moisture absorption effect. Subsequently, the air that has been cooled and dehumidified will enter the hollow ring 331 along the L-shaped tube 332, further enter the cavity 202 on the rotating shaft 201, and finally be discharged through the air outlet 205 that is distributed in an annular shape and obliquely opened on the rotating shaft 201, so as to perform targeted cooling on the rotor assembly 2. This design ensures that the cold air can be blown directly to the rotor assembly 2, further improving the cooling effect. Through the double cooling heat dissipation mechanism, the heat in the motor housing 1 can be effectively dissipated, avoiding heat accumulation, thereby ensuring the stability of the motor operation.

[0065] The filter cartridge 322 is designed as a detachable structure and is installed on the air inlet pipe 321, which is convenient for cleaning the filter screen 326 or replacing the entire filter cartridge 322. When disassembling, just press the lock rod 324 inward to disengage it from the lock hole 328, and rotate the filter cartridge 322 counterclockwise 90 degrees, and then pull it out. When installing, also press the lock rod 324 inward to align it with the upper end of the sliding groove 327, then press the filter cartridge 322 downward to the bottom, and then rotate it clockwise 90 degrees. At this time, the lock rod 324 will lose its resistance, and the compression spring 325 will generate a reset force to push the lock rod 324 out of the movable groove 323 and insert it into the lock hole 328, thereby completing the fixation of the filter cartridge 322.

[0066] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A permanent magnet motor rotor with a permanent magnet layered structure, characterized in that: include: A motor outer shell (1), wherein both ends of the motor outer shell (1) are provided with air holes, and dustproof nets are arranged in the air holes; A rotor assembly (2), wherein the rotor assembly (2) is arranged in the motor outer shell (1); A heat dissipation mechanism (3), the heat dissipation mechanism (3) being arranged on the motor outer shell (1) and being used for dissipating heat inside the motor; The heat dissipation mechanism (3) comprises a cooling part (31), which is arranged in an array distribution on the outer surface of the motor housing (1) and is used to cool and dehumidify the air entering the motor. One end of the cooling part (31) is provided with an air intake part (32) for filtering the inhaled air, and one end of the cooling part (31) is provided with a gas delivery part (33) for delivering gas.

2. The permanent magnet motor rotor with a permanent magnet layered structure according to claim 1, characterized in that: The rotor assembly (2) comprises a rotating shaft (201), the rotating shaft (201) is rotatably arranged on the motor housing (1), a cavity (202) is provided on the rotating shaft (201), a rotor fan (203) and a turbine blade (204) are fixedly connected to the right end of the output shaft of the rotating shaft (201), air outlet holes (205) are provided in annular distribution at both left and right ends of the rotating shaft (201), a front bearing (206) and a rear bearing (207) are provided at both left and right ends of the rotating shaft (201), an outer wall of the rotating shaft (201) is arranged on a rotor core (208), and through grooves (209) are provided in annular distribution on the rotor core (208).

3. The permanent magnet motor rotor with a permanent magnet layered structure according to claim 1, characterized in that: The cooling part (31) comprises an outer shell (311), the outer shell (311) is fixedly connected to the motor outer shell (1), the front and rear sides of the middle outer shell (311) are connected to water pipes (312) in an array, and the other end of the water pipe (312) is connected to the adjacent outer shell (311), the outer shells (311) at the front and rear ends are fixedly connected to drainage pipes (313), and the lower end of the drainage pipe (313) is provided with a sealing plug, the outer shell (311) is installed with a semiconductor cooling plate (314), and the inner cavity of the outer shell (311) is connected to moisture absorption plates (315) in a staggered manner.

4. The permanent magnet motor rotor with a permanent magnet layered structure according to claim 3, characterized in that: The air intake portion (32) comprises an air intake pipe (321), the air intake pipe (321) is fixedly connected to the outer shell (311), a filter cartridge (322) is detachably connected to the air intake pipe (321), a movable groove (323) is provided on the filter cartridge (322), a locking rod (324) is inserted into one end of the movable groove (323), a compression spring (325) is fixedly connected between the locking rod (324) and the movable groove (323), a filter screen (326) is fixedly connected to the inner wall of the filter cartridge (322), a sliding groove (327) is provided on the inner wall of the air intake pipe (321), and a locking hole (328) is provided at the bottom end of the sliding groove (327).

5. The permanent magnet motor rotor with a permanent magnet layered structure according to claim 3, characterized in that: The gas delivery portion (33) comprises an L-shaped tube (332) and a hollow circular ring (331); one end of the L-shaped tube (332) is in communication with the outer shell (311), and the other end is in communication with the hollow circular ring (331); the hollow circular ring (331) is fixedly connected to the outer shell (1) of the motor by means of a support rod, and the right end of the rotating shaft (201) extends into the hollow circular ring (331) and is rotatably connected to the hollow circular ring (331).

6. The permanent magnet motor rotor with a permanent magnet layered structure according to claim 2, characterized in that: The through slot (209) is used to install a permanent magnet, and the through slot (209) is divided into two layers, each layer having eight sections.

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