Self-cooling heat-dissipation type permanent magnet torque motor

Abstract

The application relates to the motor technical field and discloses a self-cooling and heat-dissipating permanent magnet torque motor which comprises a shell, end covers arranged at two ends of the shell, a sealed cavity formed by the shell and the end covers, a main shaft rotatably arranged in the sealed cavity, a rotor fixed on the main shaft, a stator arranged on the inner wall of the sealed cavity, a heat-dissipating unit, an inner-layer heat-dissipating cavity and an outer-layer heat-dissipating cavity arranged in the shell, a plurality of groups of flow holes equidistantly arranged at two ends of the inner-layer heat-dissipating cavity in the circumferential direction, cavities formed between the two end faces of the shell and the inner walls of the corresponding end covers, an adjusting unit arranged in the cavities, and a plurality of groups of conveying holes equidistantly arranged on the inner wall of the end cover in the circumferential direction. The self-cooling and heat-dissipating permanent magnet torque motor is adjusted and controlled according to the motor working condition by arranging the heat-dissipating unit and the adjusting unit. In the low-rotating-speed and low-load working condition, the adjusting plate shields the flow guide groove, the cooling liquid only circulates in the inner-layer heat-dissipating cavity, and the energy loss caused by the overcooling phenomenon is avoided.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a self-cooling permanent magnet torque motor. Background Technology

[0002] In recent years, with the continuous development of the electric vehicle industry, the motor, as the core power component of electric vehicles, directly determines key indicators such as vehicle power output and driving range. Permanent magnet torque motors, with their significant advantages of high coupling stiffness, high linearity, and high torque-to-inertia ratio, are widely used in the drive system of electric vehicles. They can output peak torque in a short time to meet the high torque requirements of vehicle starting, acceleration, and climbing, while also being able to operate stably at low speeds or even in stalled conditions.

[0003] The liquid-cooled motor disclosed in CN115102331A includes an internal gear ring. A cover and a support are tightly fitted to the left and right sides of the internal gear ring, respectively. A housing is fixedly connected to the right side of the support, and a face shield is fixedly connected to the right side of the housing. An oil reservoir ring is fixedly connected to the left side of the cover, a sealing ring is fixedly connected to the left side of the oil reservoir ring, and a protective cover is fixedly connected to the left side of the sealing ring. A main shaft is rotatably mounted inside the internal gear ring, cover, support, housing, oil reservoir ring, and protective cover. Several driven gears mesh with the inner wall of the internal gear ring, and these driven gears mesh with a driving gear. Although the above technical solution can utilize the reduction structure of the driving and driven gears to pump oil with high torque, and simultaneously drive the fan blades to rotate at high speed through the main shaft, using airflow and heat-conducting plates to dissipate heat from the oil in the oil reservoir ring, it to a certain extent ensures the stability of the motor's output efficiency.

[0004] However, in practical applications, permanent magnet torque motors still generate a large amount of heat during operation due to factors such as the current thermal effect of the internal stator windings and the mechanical friction between the permanent magnets and the rotor. Currently, heat dissipation of permanent magnet torque motors generally relies on external cooling circulation systems, that is, by setting up cooling devices outside the motor and using coolant circulation to remove heat. However, when the motor is at low speed and low load, the motor generates less heat, while the coolant still flows through the fixed heat dissipation channel at a constant flow rate, resulting in an "overcooling" phenomenon and causing unnecessary energy loss. When the motor enters high speed and high load conditions, the heat generation of components such as the stator windings and permanent magnets increases dramatically, and the heat dissipation area and flow rate of the fixed channel cannot be dynamically expanded. Even if the coolant flow rate is increased, it is difficult to quickly remove the heat sufficiently, which cannot meet the demand for rapid dissipation of a large amount of heat under high load conditions. This causes the heat inside the motor to accumulate continuously, which can easily lead to demagnetization of the permanent magnets and aging of the insulation. Summary of the Invention

[0005] The purpose of this invention is to provide a self-cooling permanent magnet torque motor to solve the problem mentioned in the background art that existing permanent magnet torque motors suffer from "overcooling" at low speeds and the inability to expand the heat dissipation area and flow rate at high speeds, resulting in continuous heat accumulation inside the motor.

[0006] The present invention provides a self-cooling permanent magnet torque motor, which adopts the following technical solution:

[0007] A self-cooling permanent magnet torque motor includes a housing and end caps at both ends of the housing. The housing and end caps form a sealed cavity. A main shaft is rotatably mounted inside the sealed cavity, and a rotor is fixed on the main shaft. A stator is provided on the inner wall of the sealed cavity. The motor also includes a heat dissipation unit, which includes an inner heat dissipation cavity and an outer heat dissipation cavity formed inside the housing. Multiple sets of flow holes are equally spaced at both ends of the inner heat dissipation cavity along the circumferential direction. A cavity is formed between each end face of the housing and the inner wall of the corresponding end cap. An adjustment unit is provided in the cavity. Multiple sets of conveying holes are equally spaced at both ends of the inner wall of the end cap along the circumferential direction. A connecting hole corresponding to each conveying hole is provided at both ends of the outer heat dissipation cavity, and the connecting hole communicates with the conveying hole.

[0008] Furthermore, the adjustment unit includes fixed disks symmetrically fixed on the main shaft. The outer edge of the fixed disks is rotatably connected to the inner wall of the housing. A sealing layer is provided on the contact surface between the fixed disks and the housing. Connecting disks are fixed on opposite sides of the two sets of fixed disks. The connecting disks are rotatably engaged with the inner wall of the end cover through a rotating sealing ring. The fixed disks, connecting disks, and housing cooperate with each other to seal the cavity. A guide disk is fixed on the connecting disk. The guide disk is rotatably connected to the cavity and divides it into an inner cavity and an outer cavity. Multiple sets of guide grooves are evenly opened on the guide disk. An adjustment plate is rotatably provided at each set of guide grooves.

[0009] When the regulating plate is stationary, it blocks the flow channel; when the regulating plate is deflected, it opens the flow channel.

[0010] Furthermore, the outer edge of the connecting plate is fixed with a base at equal intervals, and the adjusting plate is rotatably connected to the base through a rotating shaft. A torsion spring is provided on the rotating shaft. When the main shaft rotates, it controls the fixed plate, the connecting plate and the guide plate to rotate synchronously. The adjusting plate deflects to open the guide groove, so that the inner heat dissipation cavity and the outer heat dissipation cavity are interconnected.

[0011] A reset mechanism is provided between the guide plate and the regulating plate, which is used to slow down the reset speed of the regulating plate.

[0012] Furthermore, the reset mechanism includes a sleeve hinged to the guide plate. The sleeve has an interconnected oil storage chamber, a narrow channel, and a movable chamber. A piston disc is slidably connected in the movable chamber. A plug rod extending through the sleeve is fixed on the piston disc. A bracket is hinged to the end of the plug rod. The bracket is fixed to the adjustment plate. The oil storage chamber is filled with hydraulic oil.

[0013] Furthermore, the guide plate is fixed with a first stop and a second stop, wherein the first stop is used to limit the adjusting plate to be in a stationary state, and the second stop is used to limit the adjusting plate to be in a deflection state.

[0014] Furthermore, the housing is provided with a circulation channel, which includes an inlet pipe, a first outlet pipe and a second outlet pipe disposed on the housing. The inlet pipe extends directly into the inner heat dissipation cavity, the first outlet pipe is connected to the inner heat dissipation cavity, and the second outlet pipe is connected to the outer heat dissipation cavity.

[0015] Furthermore, the inner heat dissipation cavity and the outer heat dissipation cavity are provided with liquid guiding units. The liquid guiding units include spiral baffles symmetrically arranged in the inner heat dissipation cavity and flow guiding parts and spiral baffles arranged in the outer heat dissipation cavity.

[0016] Furthermore, the starting end of the spiral baffle corresponds to the inlet pipe, and the ending end corresponds to the first outlet pipe.

[0017] Furthermore, the flow guide is composed of an outer baffle and an inner baffle, which form a serpentine channel, and the liquid inlet of the serpentine channel is connected to the connecting hole.

[0018] Furthermore, the spiral baffles are symmetrically fixed inside the outer heat dissipation cavity, with the two sets of spiral baffles located on both sides of the second liquid outlet pipe.

[0019] The beneficial effects of this invention are:

[0020] 1. By setting up a heat dissipation unit and an adjustment unit, and adjusting according to the motor's operating conditions, the adjustment plate blocks the guide groove at low speed and low load conditions, so that the coolant circulates only in the inner heat dissipation cavity, avoiding the energy loss caused by "overcooling"; when entering the high speed and high load conditions, the adjustment plate deflects under the action of centrifugal force, so that the inner heat dissipation cavity and the outer heat dissipation cavity are interconnected, expanding the heat dissipation area and coolant flow, and quickly carrying away the increased heat, thereby effectively preventing the continuous accumulation of heat inside the motor, which can cause permanent magnet demagnetization and insulation aging.

[0021] 2. By setting a reset mechanism and utilizing the flow damping of hydraulic oil in narrow channels, the reset speed of the regulating plate can be slowed down. This provides a buffer transition when the motor operating conditions change abruptly, avoiding sudden changes in coolant circulation flow caused by rapid reset of the regulating plate. It further improves the timeliness of opening the heat dissipation channel under high load conditions and the smoothness of shutting down the heat dissipation system under low load conditions, maintains the dynamic balance of the heat dissipation system, and extends the service life of the motor. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic cross-sectional view of the three-dimensional structure of the present invention;

[0024] Figure 3 This is a side view cross-sectional diagram of the housing, end cap, main shaft, and heat dissipation unit of the present invention.

[0025] Figure 4 This is a side view cross-sectional diagram of the end cap, main shaft, and adjustment unit of the present invention.

[0026] Figure 5 This is a three-dimensional structural diagram of the end cap, fixing plate, flow guide plate, flow guide groove, adjusting plate and reset mechanism of the present invention;

[0027] Figure 6 This is a three-dimensional structural diagram of the adjustment unit and reset mechanism of the present invention;

[0028] Figure 7 This is a three-dimensional structural diagram of the adjusting plate, rotating shaft, and reset mechanism of the present invention;

[0029] Figure 8 This is a three-dimensional cross-sectional view of the housing of the present invention;

[0030] Figure 9 This is a schematic diagram showing the three-dimensional structure of the spiral partition of the present invention;

[0031] Figure 10 This is a schematic diagram showing the three-dimensional structure of the flow guide and spiral baffle of the present invention.

[0032] Figure 11 This is a three-dimensional structural diagram of the flow guide section of the present invention.

[0033] In the picture:

[0034] 100. Housing; 200. End cap; 300. Main shaft; 400. Rotor; 500. Stator; 600. Heat dissipation unit; 601. Inner heat dissipation cavity; 602. Outer heat dissipation cavity; 603. Flow hole; 604. Cavity; 6041. Inner cavity; 6042. Outer cavity; 605. Conveying hole; 606. Connecting hole; 607. Liquid inlet pipe; 608. First liquid outlet pipe; 609. Second liquid outlet pipe; 700. Adjustment unit; 701. Fixed plate; 702. Connecting plate; 703. Guide plate; 7031, Block 1; 7032, Block 2; 704, Guide channel; 705, Adjusting plate; 706, Base; 707, Rotating shaft; 708, Torsion spring; 800, Reset mechanism; 801, Sleeve; 802, Oil storage chamber; 803, Narrow channel; 804, Movable chamber; 805, Piston disc; 806, Connecting rod; 807, Support; 900, Liquid guiding unit; 901, Spiral baffle; 902, Guide section; 9021, Outer baffle; 9022, Inner baffle; 903, Spiral baffle. Detailed Implementation

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Reference Figures 1-2 This application provides a self-cooling permanent magnet torque motor, including a housing 100 and end caps 200 disposed at both ends of the housing 100. The housing 100 and the end caps 200 are fixed by high-strength bolts, and multi-layer fluororubber sealing rings are provided on the mating surfaces. The housing 100 and the end caps 200 enclose a sealed cavity, and a main shaft 300 is rotatably disposed inside the sealed cavity. A rotor 400 is fixed on the main shaft 300, and a stator 500 is disposed on the inner wall of the sealed cavity.

[0037] Reference Figures 2-4 and Figure 8The system also includes a heat dissipation unit 600, which comprises an inner heat dissipation cavity 601 and an outer heat dissipation cavity 602 formed within the housing 100. Both the inner and outer heat dissipation cavities 601 and 602 are formed through the inner wall of the housing 100 along its axial direction, with a rectangular cross-section. The outer heat dissipation cavity 602 is located outside the inner heat dissipation cavity 601. Multiple sets of flow holes 603 are equally spaced at both ends of the inner heat dissipation cavity 601 along the circumferential direction. Cavities 604 are formed between the two end faces of the housing 100 and the inner walls of the corresponding end caps 200, respectively. An adjustment unit 700 is installed within the cavity 604. Multiple sets of conveying holes 605 are equally spaced at both ends of the inner wall of the end caps 200 along the circumferential direction. Connecting holes 606, corresponding one-to-one with the conveying holes 605, are formed at both ends of the outer heat dissipation cavity 602. 5. A circulation channel is provided on the housing 100. The circulation channel includes an inlet pipe 607, a first outlet pipe 608, and a second outlet pipe 609 provided on the housing 100. The inlet pipe 607 is located at the center of the outer surface of the housing 100 and extends radially to the inner heat dissipation cavity 601. The first outlet pipe 608 is symmetrically arranged at the front and rear positions of the outer surface of the housing 100 and also connects to the inner heat dissipation cavity 601. The second outlet pipe 609 is located at the center of the outer surface of the housing 100 and extends to the outer heat dissipation cavity 602. The inlet pipe 607 and the second outlet pipe 609 are in the same central area but are not coaxially nested. The two axes form an angle of 15° to 30°. Solenoid valves are provided on the inlet pipe 607, the first outlet pipe 608, and the second outlet pipe 609.

[0038] Specifically, refer to Figures 3-6 The adjustment unit 700 includes fixed disks 701 symmetrically fixed to the main shaft 300. The outer edge of the fixed disks 701 is rotatably connected to the inner wall of the housing 100. A sealing layer is provided on the contact surface between the fixed disks 701 and the housing 100 to prevent coolant leakage. Connecting disks 702 are fixed on opposite sides of the two sets of fixed disks 701 respectively. The connecting disks 702 and the inner wall of the end cover 200 are rotatably engaged by a rotating sealing ring. The fixed disks 701, connecting disks 702 and the housing 100 cooperate to seal the cavity 604. A guide disk 703 is fixed on the connecting disk 702. The guide disk 703 rotates... The dynamic connection is located within the cavity 604, dividing it into an inner cavity 6041 and an outer cavity 6042. Multiple sets of guide grooves 704 are evenly opened on the guide plate 703. An adjustment plate 705 is rotatably installed at each set of guide grooves 704. When the adjustment plate 705 is stationary, it blocks the guide groove 704. When the motor is in a low-speed, low-load condition, the motor generates less heat. At this time, the adjustment plate 705 is stationary, and the coolant circulates only in the inner heat dissipation cavity 601, avoiding unnecessary energy loss. When the adjustment plate 705 is deflected, it is used to open the guide grooves 704.

[0039] The connecting plate 702 has a base 706 fixed at equal intervals on its outer edge. The adjusting plate 705 is rotatably connected to the base 706 via a rotating shaft 707. A torsion spring 708 is provided on the rotating shaft 707. When the main shaft 300 rotates, it controls the fixed plate 701, the connecting plate 702, and the guide plate 703 to rotate synchronously. As the speed of the main shaft 300 increases, the adjusting plate 705 will be subjected to centrifugal force. When the centrifugal force is greater than the elastic force of the torsion spring 708, the adjusting plate 705 will deflect, causing the guide groove 704 to open, allowing the inner heat dissipation cavity 601 and the outer heat dissipation cavity 602 to communicate with each other. The coolant can enter the outer heat dissipation cavity 602 from the inner heat dissipation cavity 601 through the guide groove 704, increasing the circulation path and heat dissipation area of ​​the coolant, thereby improving the heat dissipation efficiency. When the motor speed decreases, the centrifugal force decreases, and the elastic force of the torsion spring 708 will cause the adjusting plate 705 to return to a stationary state, re-blocking the guide groove 704, and the coolant will only circulate in the inner heat dissipation cavity 601.

[0040] Specifically, under low-speed and low-load conditions, coolant is preferentially injected into the inner heat dissipation cavity 601 through the inlet pipe 607. At this time, the guide plate 703 is in its initial position, and the adjusting plate 705 blocks the guide groove 704. The coolant mainly circulates within the inner heat dissipation cavity 601, achieving basic heat dissipation through the heat conduction of the housing 100, while reducing pumping power consumption. Under high-speed and high-load conditions, when the spindle speed 300 increases, the fixed plate 701 and the guide plate 703 move with the spindle speed 300. 0. Under the action of centrifugal force, the adjusting plate 705 deflects outward against the resistance of the torsion spring 708, and the open area of ​​the guide channel 704 gradually increases. After the coolant enters the inner cavity 6041 through the flow hole 603, it is diverted to the outer cavity 6042 through the guide channel 704, and then enters the outer heat dissipation cavity 602 through the conveying hole 605 and the connecting hole 606 in sequence. The expansion cross section of the outer heat dissipation cavity 602 is larger than that of the inner heat dissipation cavity 601, so it can accommodate more coolant and improve the heat dissipation efficiency.

[0041] Furthermore, refer to Figures 5-7A reset mechanism 800 is provided between the guide plate 703 and the adjusting plate 705. The reset mechanism 800 is used to delay the reset speed of the adjusting plate 705. The reset mechanism 800 includes a sleeve 801 hinged to the guide plate 703. The sleeve 801 has an interconnected oil storage chamber 802, a narrow channel 803, and a movable chamber 804. A piston plate 805 is slidably connected in the movable chamber 804. A plug rod 806 extending through the sleeve 801 is fixed on the piston plate 805. A bracket 807 is hinged to the end of the plug rod 806 and fixed to the adjusting plate 705. The oil storage chamber 802 is filled with hydraulic oil. When the motor enters a high-speed, high-load condition, the adjusting plate 705 deflects under the action of centrifugal force, overcoming the initial preload of the torsion spring 708. The bracket 807 pulls the plug rod 806 outward, causing the piston plate 805 to move away from the oil storage chamber in the movable chamber 804. As the oil reservoir 802 slides in the direction of the oil reservoir 802, the hydraulic oil in the reservoir 802 flows into the movable cavity 804 through the narrow channel 803 under the pressure difference. When the motor speed decreases and the operating condition switches to a low load state, the centrifugal force decreases accordingly, and the elastic potential energy stored in the torsion spring 708 begins to be released, driving the adjusting plate 705 to reset to the initial position. The adjusting plate 705 pushes the plug rod 806 to move in the opposite direction through the bracket 807, driving the piston disc 805 to slide towards the reservoir 802, squeezing the hydraulic oil in the movable cavity 804. At this time, the hydraulic oil needs to flow back to the reservoir 802 through the narrow channel 803. Due to the flow restriction effect of the inner diameter of the narrow channel 803, the hydraulic oil cannot be discharged quickly, forming a damping effect similar to that of a damper, thereby avoiding the sudden interruption of the flow in the outer heat dissipation cavity 602 due to the reset being too fast, so that the coolant circulation flow rate can gradually decrease with the actual heat generation demand of the motor, maintaining the dynamic balance of the heat dissipation system.

[0042] The reset mechanism 800 utilizes the flow damping of hydraulic oil in the narrow channel 803 to delay the reset of the regulating plate 705, thereby providing a buffer transition when the motor operating conditions change abruptly. This effectively improves the heat dissipation stability and energy utilization efficiency of the permanent magnet torque motor under complex operating conditions, maintains the dynamic balance of the heat dissipation system, and extends the service life of the motor.

[0043] Reference Figure 5 The guide plate 703 is fixed with a first stop 7031 and a second stop 7032. The first stop 7031 is used to limit the adjusting plate 705 to be in a stationary state, and the second stop 7032 is used to limit the adjusting plate 705 to be in a deflection state. The first stop 7031 and the second stop 7032 effectively prevent abnormal situations from occurring due to excessive deflection or failure to reset the adjusting plate 705.

[0044] Furthermore, refer to Figures 8-11The inner heat dissipation cavity 601 and the outer heat dissipation cavity 602 are equipped with liquid guiding units 900. The liquid guiding unit 900 includes spiral baffles 901 symmetrically arranged in the inner heat dissipation cavity 601 and flow guiding parts 902 and spiral baffles 903 arranged in the outer heat dissipation cavity 602. Specifically, the starting end of the spiral baffle 901 corresponds to the liquid inlet pipe 607 and the ending end corresponds to the first liquid outlet pipe 608. The symmetrical spiral baffles 901 form two symmetrically arranged spiral channels, so that after flowing in from the liquid inlet pipe 607, it can be evenly distributed into the two symmetrical spiral channels and fully contact the heat-generating components, thereby significantly increasing the heat exchange area between the coolant and the heat, improving the heat exchange efficiency, and more effectively removing the heat generated inside the motor.

[0045] Specifically, refer to Figures 10-11 The flow guide 902 consists of an outer baffle 9021 and an inner baffle 9022, which form a serpentine channel. The inlet of the serpentine channel is connected to the connecting hole 606. When the coolant flows into the outer heat dissipation cavity 602 from the connecting hole 606, after passing through the serpentine channel, compared with the straight channel, the contact time between the coolant and the inner wall of the outer heat dissipation cavity 602 and the surrounding heat-generating components is greatly extended, so that the coolant can fully absorb the large amount of heat generated by the motor under high load conditions and effectively reduce the motor temperature.

[0046] Specifically, refer to Figure 10 Spiral baffles 903 are symmetrically fixed inside the outer heat dissipation cavity 602. The two sets of spiral baffles 903 are located on both sides of the second liquid outlet pipe 609. After the coolant completes the flow of the serpentine channel, the symmetrically arranged spiral baffles 903 can guide the coolant to flow evenly to the second liquid outlet pipe 609.

[0047] This application provides a self-cooling permanent magnet torque motor with the following working principle: When the motor is in a low-speed, low-load condition, the solenoid valve on the inlet pipe 607 is opened, and the coolant flows into the inner heat dissipation cavity 601 from the center of the outer surface of the housing 100 through the inlet pipe 607. Since the main shaft 300 rotates at a low speed at this time, the adjusting plate 705 in the adjusting unit 700 remains stationary under the action of the torsion spring 708, blocking the guide groove 704 on the guide plate 703. The coolant can only circulate in the inner heat dissipation cavity 601. The spiral baffles 901 symmetrically arranged in the inner heat dissipation cavity 601 evenly distribute the coolant to two spiral channels, extending the coolant flow path and allowing it to fully contact the heat-generating components. Basic heat dissipation is achieved through the heat conduction of the housing 100. After heat exchange, the coolant flows out through the first outlet pipe 608 located at the front and rear positions of the outer surface of the housing 100.

[0048] When the motor enters a high-speed, high-load operating condition, the spindle 300 speed increases, and the fixed disk 701, connecting disk 702, and guide disk 703 rotate synchronously with the spindle 300. Under the action of centrifugal force, the adjusting plate 705 overcomes the elastic force of the torsion spring 708 and deflects, opening the guide groove 704. The higher the spindle 300 speed, the larger the open area of ​​the guide groove 704. The inner heat dissipation cavity 601 is connected to the outer heat dissipation cavity 602, and the liquid inlet pipe 607 continuously injects coolant into the inner heat dissipation cavity 601. Some of the coolant flows through the flow holes 603 at both ends of the inner heat dissipation cavity 601. The coolant enters the inner cavity 6041 separated by the guide plate 703, and then flows to the outer cavity 6042 through the guide groove 704. Subsequently, it enters the outer heat dissipation cavity 602 through the conveying hole 605 on the inner wall of the end cover 200 and the connecting hole 606 at both ends of the outer heat dissipation cavity 602. Once inside the outer heat dissipation cavity 602, the coolant first flows through the serpentine channel formed by the outer baffle 9021 and the inner baffle 9022, and then enters the spiral channel guided by the symmetrical spiral baffle 903, which causes the coolant to flow evenly to the second outlet pipe 609 located at the center of the outer surface of the housing 100 for discharge.

[0049] When the motor switches from high speed to low speed, the centrifugal force decreases, and the torsion spring 708 drives the adjusting plate 705 to reset. At this time, the piston disc 805 slides in the opposite direction in the movable chamber 804. Due to the flow restriction effect of the narrow channel 803 on the hydraulic oil, the reset speed of the adjusting plate 705 is slowed down.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A self-cooling permanent magnet torque motor, comprising a housing (100) and end caps (200) disposed at both ends of the housing (100), wherein the housing (100) and the end caps (200) enclose a sealed cavity, a main shaft (300) is rotatably disposed within the sealed cavity, a rotor (400) is fixed on the main shaft (300), and a stator (500) is disposed on the inner wall of the sealed cavity, characterized in that: It also includes a heat dissipation unit (600), which includes an inner heat dissipation cavity (601) and an outer heat dissipation cavity (602) opened in the housing (100). The inner heat dissipation cavity (601) has multiple sets of flow holes (603) evenly spaced along the circumferential direction at both ends. The two end faces of the housing (100) and the inner walls of the corresponding end caps (200) respectively form cavities (604). An adjustment unit (700) is provided in the cavity (604). The inner wall of the end caps (200) has multiple sets of conveying holes (605) evenly spaced along the circumferential direction. The two ends of the outer heat dissipation cavity (602) are provided with connecting holes (606) corresponding to the conveying holes (605), and the connecting holes (606) are connected to the conveying holes (605). The adjustment unit (700) includes a fixed disk (701) symmetrically fixed on the main shaft (300). The outer edge of the fixed disk (701) is rotatably connected to the inner wall of the housing (100). Two sets of fixed disks (701) are respectively fixed with connecting disks (702) on opposite sides. The connecting disks (702) are rotatably engaged with the inner wall of the end cover (200). The fixed disks (701), connecting disks (702) and housing (100) cooperate with each other to seal the cavity (604). A guide disk (703) is fixed on the connecting disk (702). The guide disk (703) is rotatably connected in the cavity (604) and divides it into an inner cavity (6041) and an outer cavity (6042). Multiple sets of guide grooves (704) are evenly opened on the guide disk (703). An adjustment plate (705) is rotatably provided at each set of guide grooves (704). When the adjusting plate (705) is stationary, it blocks the flow channel (704); when the adjusting plate (705) is deflected, it opens the flow channel (704). The outer edge of the connecting plate (702) is fixed with a base (706) at equal intervals. The adjusting plate (705) is rotatably connected to the base (706) through a rotating shaft (707). A torsion spring (708) is provided on the rotating shaft (707). The rotation of the main shaft (300) controls the synchronous rotation of the fixed plate (701), the connecting plate (702) and the guide plate (703). The adjustment plate (705) deflects to open the guide groove (704), so that the inner heat dissipation cavity (601) and the outer heat dissipation cavity (602) are interconnected. A reset mechanism (800) is provided between the guide plate (703) and the regulating plate (705). The reset mechanism (800) is used to delay the reset speed of the regulating plate (705). The reset mechanism (800) includes a sleeve (801) hinged to a guide plate (703). The sleeve (801) has an oil storage chamber (802), a narrow channel (803) and a movable chamber (804) that are connected to each other in sequence. A piston plate (805) is slidably connected in the movable chamber (804). A plug rod (806) that extends through the sleeve (801) is fixed on the piston plate (805). A bracket (807) is hinged to the end of the plug rod (806). The bracket (807) is fixed on the adjusting plate (705). The oil storage chamber (802) is filled with hydraulic oil.

2. The self-cooling permanent magnet torque motor according to claim 1, characterized in that: The guide plate (703) is fixed with a first stop (7031) and a second stop (7032), wherein the first stop (7031) is used to limit the adjustment plate (705) to be in a stationary state, and the second stop (7032) is used to limit the adjustment plate (705) to be in a deflection state.

3. The self-cooling permanent magnet torque motor according to claim 1, characterized in that: The housing (100) is provided with a circulation channel, which includes an inlet pipe (607), a first outlet pipe (608) and a second outlet pipe (609) provided on the housing (100). The inlet pipe (607) extends directly to the inner heat dissipation cavity (601), the first outlet pipe (608) is connected to the inner heat dissipation cavity (601), and the second outlet pipe (609) is connected to the outer heat dissipation cavity (602).

4. The self-cooling permanent magnet torque motor according to claim 1, characterized in that: The inner heat dissipation cavity (601) and the outer heat dissipation cavity (602) are provided with liquid guiding units (900). The liquid guiding unit (900) includes a spiral baffle (901) symmetrically arranged in the inner heat dissipation cavity (601), and a flow guiding part (902) and a spiral baffle (903) arranged in the outer heat dissipation cavity (602).

5. The self-cooling permanent magnet torque motor according to claim 4, characterized in that: The starting end of the spiral baffle (901) corresponds to the inlet pipe (607), and the ending end corresponds to the first outlet pipe (608).

6. The self-cooling permanent magnet torque motor according to claim 4, characterized in that: The flow guide (902) consists of an outer baffle (9021) and an inner baffle (9022), which form a serpentine channel. The liquid inlet of the serpentine channel is connected to the connecting hole (606).

7. The self-cooling permanent magnet torque motor according to claim 4, characterized in that: The spiral baffles (903) are symmetrically fixed inside the outer heat dissipation cavity (602), and the two sets of spiral baffles (903) are located on both sides of the second liquid outlet pipe (609).

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