A permanent magnet motor for a swimming pool pump

Abstract

The application discloses a kind of for swimming pool pump permanent magnet motor, it is related to permanent magnet motor technical field, including motor shell, the inner cavity of motor shell is successively sleeved with stator core unit, rotor core unit and rotating shaft from outside to inside, the rotor core unit is formed by the lamination of several layers of silicon steel sheet, the inner wall of the silicon steel sheet is fixedly connected with six groups of equal-angle distribution permanent magnet block, adjacent two groups of the permanent magnet block between is equipped with reciprocating sliding magnetic separation combination block, the magnetic separation combination block is sequentially aligned with adjacent permanent magnet block when reciprocating sliding, with the magnetic induction line coupling strength between dynamic rotor core unit and stator core unit, by three-section magnetic separation combination block reciprocating sliding, reach permanent magnet and the magnetic coupling strength dynamic adjustment between stator, without frequency converter adjustment, reduce power consumption, according to day and night mode switch operating state, prevent impurity deposition in low energy consumption state, shorten daytime high energy consumption operation length, overall more energy-saving.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet motor technology, specifically a permanent magnet motor for swimming pool pumps. Background Technology

[0002] With the increasing demands for energy conservation and environmental protection, and the rapid development of motor control technology, permanent magnet synchronous motors are being used more and more widely in various household and industrial equipment. In the field of pool circulation pumps, traditional induction motors are gradually being replaced by high-efficiency and energy-saving permanent magnet motors. As the core power equipment of the pool water treatment system, the pool circulation pump needs to run continuously for a long time to ensure the circulation, filtration, disinfection and oxygenation of the pool water. Its operating energy consumption accounts for a high proportion of the overall operating energy consumption of the pool. With its technical advantages of high power density, high efficiency, wide speed range, low vibration and low noise, the permanent magnet synchronous motor perfectly meets the working conditions of the pool circulation pump and has become the optimal solution to replace the traditional induction motor. Currently, swimming pool water environments are rich in impurities such as algae, microorganisms, and calcium and magnesium ions. Under long-term operation, biofilms or scale can easily form on the inner walls of pipes, filters, and impeller surfaces. Fixed speed cannot effectively remove these impurities. When traditional permanent magnet motors are connected to swimming pool pumps, they mainly provide driving force through the fixed magnetic circuit design between the rotor and stator. Their magnetic field coupling strength is constant, and the output torque is the same. To generate water flow interference, the speed can only be adjusted by repeatedly changing the speed of the frequency converter, thereby generating pulse-like impacts on the water in the pool to achieve the purpose of removing impurities. However, such frequent frequency converter speed regulation operations not only increase the complexity and energy consumption of the motor control system, but also the electromagnetic harmonics generated during the frequency conversion process will aggravate the electrical corrosion of the motor winding insulation layer, affecting the long-term stable operation of the equipment as a whole. Therefore, in order to address the above problems, this invention proposes a permanent magnet motor for pool pumps that can dynamically adjust the magnetic field coupling strength between the rotor core unit and the stator core unit, so as to change the output torque without relying on frequency converter speed regulation, and can also simultaneously achieve enhanced heat dissipation of the stator winding during the regulation process. Summary of the Invention

[0003] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. Specifically, the purpose of the present invention is to provide a permanent magnet motor for swimming pool pumps, thereby solving the problem that most permanent magnet motors used in the background technology rely on frequency converters for speed regulation.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a permanent magnet motor for a swimming pool pump, comprising a motor housing, wherein a stator core unit, a rotor core unit, and a rotating shaft are sequentially fitted into the inner cavity of the motor housing from the outside to the inside; the rotor core unit is formed by stacking several layers of silicon steel sheets; six sets of equidistantly distributed permanent magnet blocks are fixedly connected to the inner wall of the silicon steel sheets; a reciprocatingly sliding magnetic isolation block is provided between two adjacent sets of permanent magnet blocks; when the magnetic isolation block reciprocates, different sections of the block will sequentially align with adjacent permanent magnet blocks to dynamically increase the magnetic field coupling strength between the rotor core unit and the stator core unit; The inner wall of the stator core unit is provided with several grooves. The inner wall of the grooves is sequentially fitted with insulating paper and stator windings. Two heat dissipation pipes are attached to both sides of the outer wall of the insulating paper. The heat dissipation pipes are filled with hydraulic oil. The stator windings are cooled by the flow of the hydraulic oil from top to bottom.

[0005] Preferably, six magnetic isolation grooves are respectively formed on the silicon steel sheet at the positions corresponding to the six magnetic isolation combination blocks, and the six magnetic isolation grooves are spaced apart between the six sets of permanent magnet blocks; The permanent magnet block is composed of two permanent magnet strips, and two magnetic conductive blocks are embedded in the inner wall of the magnetic isolation groove corresponding to the positions of the permanent magnet blocks on both sides.

[0006] Preferably, the magnetic shielding assembly is composed of an antimagnetic section, a gradient magnetic permeability section, and a high magnetic permeability section. One end of the magnetic shielding assembly is slidably connected to a guide rod, and one end of the guide rod is fixedly connected to the inner wall of the magnetic shielding groove.

[0007] Preferably, the inner cavity of the silicon steel sheet is rotatably connected to a rotating ring, and six inclined grooves are opened on the rotating ring corresponding to the positions of the six magnetic isolation blocks. A slider is slidably connected to the inner wall of the inclined groove, and the top of the slider is fixedly connected to the bottom of the high magnetic permeability section.

[0008] Preferably, a push plate is slidably connected to the front end of one of the magnetic isolation slots. The push plate passes through the entire rotor core unit and is fixedly connected to the magnetic isolation assembly block in the corresponding magnetic isolation slot.

[0009] Preferably, a hydraulic cylinder is fixedly connected to the top outer wall of the motor housing, and an oil supply pipe and an oil return pipe are respectively inserted into both sides of the hydraulic cylinder. A sealing plug is slidably connected inside the hydraulic cylinder, and a linear electric push rod is installed on the upper surface of the sealing plug. Preferably, a hydraulic telescopic rod is installed at each of the upper and lower ends of the push plate. Two annular sealing sleeves are fixedly connected to the inner cavity of the motor housing corresponding to the positions of the two hydraulic telescopic rods. The two annular sealing sleeves are symmetrically distributed vertically. A sealing ring is rotatably connected to the annular sealing sleeve. The piston rod of the hydraulic telescopic rod is fixedly connected to the push plate. The pipe part of the hydraulic telescopic rod is fixedly connected to the sealing ring through a conduit.

[0010] Preferably, the annular sealing sleeve located at the top of the inner cavity of the motor housing is connected to the oil supply pipe, and the annular sealing sleeve located at the bottom of the inner cavity of the motor housing is connected to the oil return pipe. The two annular sealing sleeves are connected by a heat dissipation pipe.

[0011] Preferably, a one-way drain valve is installed at the end of the oil supply pipe near the oil cylinder, a solenoid valve is installed at the end of the oil return pipe near the oil cylinder, and a controller is fixedly installed on the outside of the motor housing.

[0012] Compared with the prior art, the beneficial effects of the present invention are: By reciprocating the sliding of the magnetic isolation block, different sections are aligned with the air gap between adjacent permanent magnet blocks, thereby dynamically changing the magnetic field coupling strength between the permanent magnet block and the stator core unit. Switching between strong and weak coupling modes breaks through the limitations of the fixed magnetic flux of traditional permanent magnet motors, and then periodically changes the rotation speed of the shaft. When the rotation speed of the shaft changes periodically, the output flow of the water pump also fluctuates periodically, thus forming an alternating pulsed water flow. The pulsed water flow helps to remove dirt, algae and microorganisms attached to the pool wall and the inner wall of the pipe. It can achieve variable frequency speed regulation without relying on the frequency converter, fundamentally avoiding the power loss, component aging and electromagnetic harmonic problems caused by repeated speed regulation of the frequency converter, thereby reducing maintenance costs and power consumption, and the energy saving effect is more significant. Furthermore, by differentiating and switching the three-section magnetic isolation blocks, adaptive adjustment of daytime and nighttime operating conditions can be achieved. During daytime operation, the magnetic isolation blocks use an alternating combination of antimagnetic and gradient magnetic sections to connect adjacent permanent magnet blocks. This maintains a large circulation flow and water pressure, and by periodically reducing them, it can further reduce the frictional heat loss of the rotating shaft. During nighttime operation, the magnetic isolation blocks use an alternating combination of antimagnetic, gradient magnetic, and high magnetic sections to connect adjacent permanent magnet blocks. At night, the water flow is static. The alternating switching of the three sections disturbs the static water flow. Under low speed and low energy consumption conditions, the equipment can also dynamically adjust the speed to form a pulsed water flow, effectively preventing impurities from accumulating at the bottom of the pool and in the pipes, reducing the daytime cleaning burden, thereby shortening the daytime high-energy consumption operation time and making the entire system more energy-efficient.

[0013] Furthermore, the process of generating pulsed water flow also ensures efficient heat dissipation. The heat dissipation pipe is attached to the outer wall of the insulating paper and filled with hydraulic oil, which is precisely applied to the stator winding. Through the directional flow of hydraulic oil from top to bottom, the heat generated by the stator winding during operation can be directly and orderly discharged. When the hydraulic oil flows in the heat dissipation pipe, it can fully exchange heat with the winding surface, effectively reducing the operating temperature of the stator winding. This heat dissipation method is highly targeted and avoids the problems of long heat transfer paths and low efficiency in traditional heat dissipation methods. It ensures that the motor can maintain a stable temperature during long-term operation, thereby extending the service life of the motor and improving operational reliability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0016] Figure 3 This is a cross-sectional view of the stator core unit and a schematic diagram of the connection structure of the stator core unit according to the present invention.

[0017] Figure 4 This is a schematic diagram of the rotor core unit structure of the present invention.

[0018] Figure 5 This is a top-view cross-sectional structural diagram of the silicon steel sheet of the present invention.

[0019] Figure 6 This is a bottom view of the silicon steel sheet structure of the present invention.

[0020] Figure 7 This is a schematic diagram of the connection structure between the rotating ring and the magnetic shielding block of the present invention.

[0021] Figure 8 This is a cross-sectional view of the hydraulic cylinder of the present invention.

[0022] In the diagram: 1. Motor housing; 2. Stator core unit; 201. Wire groove; 202. Insulating paper; 203. Stator winding; 204. Heat sink; 3. Rotor core unit; 4. Silicon steel sheet; 401. Magnetic isolation groove; 402. Rotary ring; 403. Inclined groove; 404. Slider; 5. Permanent magnet block; 6. Magnetic isolation assembly block; 601. Antimagnetic section; 602. Gradient magnetic guiding section; 603. High magnetic permeability section; 604. Guide rod; 7. Rotating shaft; 8. Hydraulic cylinder; 9. Sealing plug; 10. Linear electric push rod; 11. Oil supply pipe; 12. Oil return pipe; 13. Hydraulic telescopic rod; 14. Annular sealing sleeve; 15. Sealing ring; 16. Push plate; 17. Magnetic guiding block. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1 to 8 The present invention provides a technical solution: a permanent magnet motor for a swimming pool pump, including a motor housing 1. The inner cavity of the motor housing 1 is fitted with a stator core unit 2, a rotor core unit 3 and a rotating shaft 7 from the outside to the inside. The rotor core unit 3 is made of several layers of silicon steel sheets 4 stacked together. Six sets of permanent magnet blocks 5 are fixedly connected to the inner wall of the silicon steel sheets 4 at equal angles. A magnetic isolation block 6 that can slide back and forth is provided between two adjacent sets of permanent magnet blocks 5. When the magnetic isolation block 6 slides back and forth, different sections of it will be aligned with the adjacent permanent magnet blocks 5 in turn to dynamically adjust the magnetic field coupling strength between the rotor core unit 3 and the stator core unit 2. The inner wall of the stator core unit 2 is provided with several wire grooves 201. The inner wall of the wire grooves 201 is sequentially fitted with insulating paper 202 and stator winding 203. Two heat dissipation pipes 204 are attached to the outer sides of the insulating paper 202 respectively. The heat dissipation pipes 204 are filled with hydraulic oil. The stator winding 203 is dissipated by the flow of hydraulic oil from top to bottom. By reciprocating the sliding of the magnetic isolation block 6, different sections of it are aligned with the air gap between adjacent permanent magnet blocks 5, thereby dynamically changing the magnetic field coupling strength between the permanent magnet block 5 and the stator core unit 2. It switches between strong coupling and weak coupling modes, breaking through the limitations of the fixed magnetic flux of traditional permanent magnet motors. This periodically changes the rotation speed of the shaft 7. When the rotation speed of the shaft 7 changes periodically, the output flow of the water pump also fluctuates periodically, thus forming an alternating pulsed water flow. The pulsed water flow helps to remove dirt, algae and microorganisms attached to the pool wall and the inner wall of the pipe. It can achieve variable frequency speed regulation without relying on the frequency converter, fundamentally avoiding the power loss, component aging and electromagnetic harmonic problems caused by repeated speed regulation of the frequency converter, thereby reducing maintenance costs and power consumption, and the overall energy saving effect is more significant. Furthermore, while forming a pulsed water flow, efficient heat dissipation can also be achieved. The heat dissipation pipe 204 is attached to the outer wall of the insulating paper 202 and filled with hydraulic oil, which is precisely applied to the stator winding 203. Through the directional flow of hydraulic oil from top to bottom, the heat generated by the stator winding 203 during operation can be directly and orderly discharged. When the hydraulic oil flows in the heat dissipation pipe 204, it can fully exchange heat with the winding surface, effectively reducing the operating temperature of the stator winding 203. This heat dissipation method is highly targeted and avoids the problems of long heat transfer paths and low efficiency in traditional heat dissipation methods. It ensures that the motor can maintain a stable temperature during long-term operation, thereby extending the service life of the motor and improving operational reliability.

[0025] In this embodiment, as Figure 3 and Figure 4 As shown, six magnetic isolation grooves 401 are respectively opened on the silicon steel sheet 4 at the positions corresponding to the six magnetic isolation combination blocks 6, and the six magnetic isolation grooves 401 are spaced apart between the six sets of permanent magnet blocks 5. The permanent magnet block 5 is composed of two permanent magnet strips, and two magnetic conductive blocks 17 are embedded in the inner wall of the magnetic isolation groove 401 corresponding to the positions of the two permanent magnet blocks 5 on both sides. It should be noted that each set of permanent magnet blocks 5 is composed of two permanent magnet strips working together, and the magnetic poles of the two permanent magnet strips are alternately distributed to ensure that the magnetic poles of adjacent permanent magnet strips can be connected, so that the six sets of permanent magnet blocks 5 form a uniform and continuous alternating magnetic pole arrangement on the inner wall of the silicon steel sheet 4, providing a stable rotating magnetic field foundation for the motor. In addition, the magnetic isolation groove 401 is arranged in an intermittent manner, precisely corresponding to the positions of two adjacent sets of permanent magnet blocks 5, matching the positions of permanent magnet blocks 5 and magnetic isolation combination blocks 6. The inner wall of the magnetic isolation groove 401 is coated with a magnetic isolation coating to further enhance the magnetic isolation effect, which can effectively block the magnetic field lines between two adjacent sets of permanent magnet blocks 5 and completely avoid short circuits in the magnetic field lines of adjacent permanent magnet blocks 5. Meanwhile, two magnetic guide blocks 17 are opened on the inner wall of the magnetic isolation groove 401 at the positions of the permanent magnet blocks 5 on both sides. The magnetic isolation combination block 6 is embedded in the magnetic isolation groove 401. Through the slider 404 of the magnetic isolation combination block 6, its different sections will be aligned with the magnetic guide blocks 17 in sequence, thereby dynamically changing the path and strength of the magnetic connection between the two adjacent permanent magnet blocks 5, and thus dynamically adjusting the magnetic field line coupling strength between the permanent magnet block 5 and the external stator core unit 2.

[0026] In this embodiment, as Figures 5 to 7 As shown, the magnetic shielding assembly 6 is composed of an antimagnetic section 601, a gradient magnetic guiding section 602, and a high magnetic permeability section 603. One end of the magnetic shielding assembly 6 is slidably connected to a guide rod 604, and one end of the guide rod 604 is fixedly connected to the inner wall of the magnetic shielding groove 401. It should be noted that the three-section magnetic isolation block 6 is composed of a diamagnetic section 601, a gradient magnetic permeability section 602, and a high magnetic permeability section 603. When the magnetic isolation block 6 slides, the sections with different magnetic permeability properties will be aligned with the air gap between the adjacent permanent magnet blocks 5 in sequence, thereby realizing the step-wise adjustment of the magnetic field line coupling strength. Specifically, the antimagnetic section 601 uses a material with high resistance and low permeability. When the two magnetic blocks 17 are aligned in this section, it can significantly block the passage of magnetic field lines, making the magnetic connection strength between the two adjacent permanent magnet blocks 5 the lowest, ensuring that most of the magnetic field lines can pass through the air gap between the rotor core unit 3 and the stator core unit 2, realizing efficient magnetic coupling between the stator and rotor, greatly improving the magnetic energy utilization rate, and the rotating shaft 7 has the highest speed. The gradient magnetic field section 602 uses a composite material with gradually changing magnetic permeability to achieve a linear transition of the magnetic field. When the two magnetic blocks 17 are aligned in this section, the internal magnetic circuit begins to gradually open up, the amount of magnetic field lines passing between adjacent permanent magnet blocks 5 gradually increases, some internal short circuits occur, the amount of internal magnetic field lines passing through gradually increases, the magnetic coupling strength between rotor core unit 3 and stator core unit 2 gradually decreases, the output torque gradually decreases, and the rotational speed of shaft 7 gradually decreases. The high-permeability section 603 uses a high-permeability material and forms a magnetic performance gradient connection with the gradient-permeability section 602. When this section aligns with the two magnetic blocks 17, the magnetic circuit between the adjacent permanent magnet blocks 5 is completely opened, the amount of internal magnetic lines of force begins to increase significantly, the magnetic coupling strength between the rotor core unit 3 and the stator core unit 2 drops to the minimum, the output torque decreases again, and the rotational speed of the shaft 7 is low. During daytime operation of the pool, the magnetic isolation block 6 uses an alternating combination of antimagnetic section 601 and gradient magnetic guiding section 602 to connect adjacent permanent magnet blocks 5. This not only maintains a large circulation flow and water pressure to meet the high operating conditions during the day, but also allows the rotating shaft 7 to form a certain frequency of speed fluctuation by periodically changing the rotation speed of the shaft 7 without frequent adjustment of the frequency converter. Its small-amplitude pulse characteristics can also enhance the flushing effect on the sediment at the bottom of the pool, improve the cleanliness of the pool, and further reduce the frictional heat loss of the rotating shaft 7 by periodically reducing it, thus extending the service life of key components such as bearings and improving the service life of parts. When operating at night, the magnetic isolation block 6 uses a combination of antimagnetic section 601, gradient magnetic section 602, and high magnetic permeability section 603 to alternately connect adjacent permanent magnet blocks 5. At night, the water flow is static, and the rotating shaft 7 is in a low-speed state. The three sections alternately switch to disturb the static water flow. Even in the low-speed state, the speed can be dynamically adjusted to form a pulsed water flow, which prevents impurities from depositing at the bottom of the pool and in the pipes. At the same time, it promotes slight convection of the water, increases the dissolved oxygen content of the water, further ensures the water quality at night, and reduces the cleaning pressure during the day. Without relying on an external frequency converter, the device can achieve adaptive adjustment of daytime and nighttime operating conditions through the differentiated combination switching of the three-section magnetic isolation combination block 6. This avoids problems such as electronic component aging, electromagnetic harmonics, and additional energy consumption caused by frequency converter speed regulation. In low-speed and low-energy-consumption conditions, the equipment can also form a pulsed water flow by dynamically adjusting the speed, effectively preventing impurities from accumulating at the bottom of the pool and in the pipes, reducing the daytime cleaning burden, thereby shortening the daytime high-energy-consumption operation time, resulting in lower power consumption, extended maintenance cycle, and significantly improved energy-saving effect of the equipment.

[0027] In this embodiment, as Figure 3 , Figure 7 and Figure 8 As shown, a rotating ring 402 is rotatably connected to the inner cavity of the silicon steel sheet 4. Six inclined grooves 403 are opened on the rotating ring 402 corresponding to the positions of the six magnetic isolation blocks 6. A slider 404 is slidably connected to the inner wall of the inclined groove 403. The top of the slider 404 is fixedly connected to the bottom of the high magnetic permeability section 603. One of the magnetic isolation slots 401 has a push plate 16 slidably connected to its front end. The push plate 16 passes through the entire rotor core unit 3 and is fixedly connected to the magnetic isolation assembly block 6 in the corresponding magnetic isolation slot 401. A hydraulic cylinder 8 is fixedly connected to the top outer wall of the motor housing 1. An oil supply pipe 11 and an oil return pipe 12 are respectively inserted into the two sides of the hydraulic cylinder 8. A sealing plug 9 is slidably connected inside the hydraulic cylinder 8. A linear electric push rod 10 is installed on the upper surface of the sealing plug 9. A hydraulic telescopic rod 13 is installed at the upper and lower ends of the push plate 16. Two annular sealing sleeves 14 are fixedly connected to the inner cavity of the motor housing 1 at the positions of the two hydraulic telescopic rods 13. The two annular sealing sleeves 14 are symmetrically distributed vertically. A sealing ring 15 is rotatably connected to the annular sealing sleeve 14. The piston rod of the hydraulic telescopic rod 13 is fixedly connected to the push plate 16. The pipe part of the hydraulic telescopic rod 13 is fixedly connected to the sealing ring 15 through the conduit. The annular sealing sleeve 14 located at the top of the inner cavity of the motor housing 1 is connected to the oil supply pipe 11, and the annular sealing sleeve 14 located at the bottom of the inner cavity of the motor housing 1 is connected to the oil return pipe 12. The two annular sealing sleeves 14 are connected by a heat dissipation pipe 204. A one-way drain valve is installed at one end of the oil supply pipe 11 near the oil cylinder 8, a solenoid valve is installed at one end of the return oil pipe 12 near the oil cylinder 8, and a controller is fixedly installed on the outside of the motor housing 1. It should be noted that the push plate 16 passes through the entire rotor core unit 3 and is fixedly connected to the magnetic shielding assembly block 6 in the corresponding magnetic shielding groove 401. By using the piston rod of the hydraulic telescopic rod 13 to push the push plate 16, the magnetic shielding assembly block 6 can be driven to slide in the magnetic shielding groove 401. Since the rotating ring 402 is rotatably connected to the inner cavity of the silicon steel sheet 4, and the six inclined grooves 403 on the rotating ring 402 are respectively slidably connected to the sliders 404 at the bottom of the six magnetic shielding assembly blocks 6, when one of the magnetic shielding assembly blocks 6 slides under the action of the push plate 16, its bottom slider 404 will be in the corresponding inclined groove. The sliding within 403 forces the rotating ring 402 to rotate. The rotation of the rotating ring 402, in turn, drives the sliders 404 at the bottom of the other five magnetic isolation blocks 6 to slide synchronously through the other five inclined slots 403. This enables the six magnetic isolation blocks 6 to slide synchronously back and forth within their respective magnetic isolation slots 401, ensuring that the position of all magnetic isolation blocks 6 remains consistent. This achieves uniform and synchronous adjustment of the magnetic field coupling strength between the permanent magnet block 5 and the stator core unit 2, avoiding magnetic field imbalance caused by asynchronous adjustment of a single magnetic isolation block 6, and ensuring the smooth operation of the motor. In addition, the oil pressure inside the hydraulic telescopic rod 13 comes from the hydraulic oil in the annular sealing sleeve 14. By embedding a sealing ring 15 on the annular sealing sleeve 14, dynamic sealing is achieved in the rotating state. When the rotor core unit 3 drives the hydraulic telescopic rod 13 to rotate synchronously, the sealing ring 15 can rotate together with the pipeline part of the hydraulic telescopic rod 13, while the annular sealing sleeve 14 is fixedly connected to the inner wall of the motor housing 1 and remains stationary. The two form a dynamic sealing interface through wear-resistant sealing material, which effectively prevents the hydraulic oil from leaking during rotation and ensures the pressure stability of the hydraulic system. The sealing scheme is based on the bearing sealing design and belongs to the prior art. In addition, for example Figure 1 and Figure 2 As shown, a controller is installed on the outside of the motor housing 1 to control the linear electric push rod 10 and the solenoid valve. A hydraulic cylinder 8 is fixed on the top of the motor housing 1. Oil supply pipe 11 and oil return pipe 12 are respectively inserted on both sides of the hydraulic cylinder 8. A sealing plug 9 is slidably connected inside the hydraulic cylinder 8. In the initial state, the two annular sealing sleeves 14, the oil supply pipe 11, the oil return pipe 12 and several heat dissipation pipes 204 are all filled with hydraulic oil. When the extension and retraction of the linear electric push rod 10 causes the sealing plug 9 to move down, hydraulic oil will be injected into the annular sealing sleeve 14 to realize the extension and retraction of the hydraulic telescopic rod 13. Specifically, when the linear electric actuator 10 extends, the controller closes the solenoid valve, the sealing plug 9 moves downward, compressing the hydraulic oil in the cylinder 8. At this time, the one-way drain valve on the oil supply pipe 11 opens, and the hydraulic oil is pumped through the oil supply pipe 11 into the annular sealing sleeve 14 located at the top of the inner cavity of the motor housing 1. The annular sealing sleeve 14 is connected to the upper hydraulic telescopic rod 13. The oil in the cylinder 8 is injected into the annular sealing sleeve 14, the oil pressure increases, and the hydraulic oil then enters the pipeline of the upper hydraulic telescopic rod 13 through the conduit. Inside, the piston rod is pushed out, which in turn drives the push plate 16 to slide inward. The hydraulic telescopic rod 13 is equipped with a spring. When the piston rod of the hydraulic telescopic rod 13 extends, the spring is compressed, the push plate 16 slides inward, and the magnetic shielding block 6 slides inward. The guide rod 604 is used to control the magnetic shielding block 6 to slide stably and not to disengage from the magnetic shielding groove 401. The front end of the hydraulic telescopic rod 13 is also fixedly connected to the silicon steel sheet 4 through a fixing plate, which cooperates with the conduit behind to ensure the stability of the piston rod of the hydraulic telescopic rod 13 during operation. At the same time, the hydraulic oil in the upper annular sealing sleeve 14 will also flow into the lower annular sealing sleeve 14 through the heat dissipation pipe 204. The lower annular sealing sleeve 14 is connected to the lower hydraulic telescopic rod 13. At this time, the hydraulic oil in the lower hydraulic telescopic rod 13 pipe is squeezed in, which also pushes its piston rod to extend. The upper and lower hydraulic telescopic rods 13 act synchronously on the push plate 16 to ensure that the push plate 16 is evenly stressed and slides smoothly. Conversely, when the magnetic isolation block 6 needs to be reset outward, the controller controls the linear electric push rod 10 to shorten and simultaneously opens the solenoid valve. Under the action of the one-way drain valve, the oil can only be recovered from the return oil pipe 12. During the recovery process, the oil pressure decreases, the spring inside the hydraulic telescopic rod 13 resets, and the piston rod resets. The extension and reset of the hydraulic telescopic rod 13 is existing technology. The piston rod reset pulls the push plate 16 to slide outward, all magnetic isolation blocks 6 reset, and the oil flows back to the oil cylinder 8 through the lower annular sealing sleeve 14 and the return oil pipe 12, completing the circulation of hydraulic oil. The oil in the cooling pipe 204 is sequentially... The hydraulic oil flows from the upper annular sealing sleeve 14 to the lower annular sealing sleeve 14. During this directional flow process, the hydraulic oil will continuously exchange heat with the heat generated by the stator winding 203. Since the heat dissipation pipe 204 is tightly attached to the outer wall of the insulating paper 202, and the insulating paper 202 wraps the stator winding 203, the large amount of heat generated by the stator winding 203 when it is running at high speed can be quickly transferred to the outer wall of the heat dissipation pipe 204 that is in direct contact with it, and then be efficiently absorbed by the hydraulic oil flowing in the pipe, forming heat exchange and realizing the integrated liquid cooling heat dissipation effect of one oil for two uses. In this embodiment, the return oil pipe 12 is located outside the motor. The hydraulic oil facilitates heat exchange between the inside and outside of the motor. When the hydraulic oil that has absorbed heat flows through the return oil pipe 12, it can directly dissipate the heat to the external environment of the motor, avoiding the accumulation of internal heat and completing the heat dissipation cycle. In other embodiments, for large swimming pools where the motor is under high operating conditions for a long time, additional heat dissipation fins or forced air cooling devices can be added to the outside of the cylinder 8 to further enhance the heat dissipation efficiency of the recovered hydraulic oil. In addition, in this embodiment, the stroke of the hydraulic telescopic rod 13 controls the sliding formation of the push plate 16 under daytime and nighttime operating conditions, thereby achieving precise control over the alignment state of different sections of the magnetic isolation block 6 with the magnetic guide block 17. Furthermore, the sliding cycle of the magnetic isolation block 6 is also determined by the extension and retraction cycle of the hydraulic telescopic rod 13. Both the extension and retraction stroke and the extension and retraction cycle of the hydraulic telescopic rod 13 can be realized by the controller, which is existing technology and will not be elaborated further.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A permanent magnet motor for a swimming pool pump, comprising a motor housing (1), wherein a stator core unit (2), a rotor core unit (3), and a rotating shaft (7) are sequentially fitted into the inner cavity of the motor housing (1) from the outside to the inside, characterized in that: The rotor core unit (3) is made of several layers of silicon steel sheets (4) stacked together. The inner wall of the silicon steel sheets (4) is fixedly connected with six sets of permanent magnet blocks (5) distributed at equal angles. A magnetic isolation block (6) that can slide back and forth is provided between two adjacent sets of permanent magnet blocks (5). When the magnetic isolation block (6) slides back and forth, its different sections will be aligned with the adjacent permanent magnet blocks (5) in turn to dynamically adjust the magnetic field line coupling strength between the rotor core unit (3) and the stator core unit (2). The inner wall of the stator core unit (2) is provided with several wire grooves (201). The inner wall of the wire grooves (201) is sequentially fitted with insulating paper (202) and stator winding (203). Two heat dissipation pipes (204) are attached to the outer sides of the insulating paper (202). The heat dissipation pipes (204) are filled with hydraulic oil. The hydraulic oil flows from top to bottom to dissipate heat from the stator winding (203).

2. A permanent magnet motor for a swimming pool pump according to claim 1, characterized in that: The silicon steel sheet (4) has six magnetic isolation grooves (401) respectively at the positions of the six magnetic isolation combination blocks (6), and the six magnetic isolation grooves (401) are arranged at intervals between the six sets of permanent magnet blocks (5); The permanent magnet block (5) is composed of two permanent magnet strips, and two magnetic conductive blocks (17) are embedded in the inner wall of the magnetic isolation groove (401) corresponding to the positions of the two permanent magnet blocks (5).

3. A permanent magnet motor for a swimming pool pump according to claim 2, characterized in that: The magnetic isolation block (6) is composed of an antimagnetic section (601), a gradient magnetic section (602), and a high magnetic permeability section (603). One end of the magnetic isolation block (6) is slidably connected to a guide rod (604), and one end of the guide rod (604) is fixedly connected to the inner wall of the magnetic isolation groove (401).

4. A permanent magnet motor for a swimming pool pump according to claim 3, characterized in that: The inner cavity of the silicon steel sheet (4) is rotatably connected to a rotating ring (402). Six inclined grooves (403) are opened on the rotating ring (402) corresponding to the positions of the six magnetic isolation blocks (6). A slider (404) is slidably connected to the inner wall of the inclined groove (403). The top of the slider (404) is fixedly connected to the bottom of the high magnetic permeability section (603).

5. A permanent magnet motor for a swimming pool pump according to claim 2, characterized in that: One of the magnetic isolation slots (401) has a push plate (16) slidably connected to its front end. The push plate (16) runs through the entire rotor core unit (3) and is fixedly connected to the magnetic isolation assembly block (6) in the corresponding magnetic isolation slot (401).

6. A permanent magnet motor for a swimming pool pump according to claim 1, characterized in that: A hydraulic cylinder (8) is fixedly connected to the top outer wall of the motor housing (1). An oil supply pipe (11) and an oil return pipe (12) are respectively inserted into the two sides of the hydraulic cylinder (8). A sealing plug (9) is slidably connected inside the hydraulic cylinder (8). A linear electric push rod (10) is installed on the upper surface of the sealing plug (9).

7. A permanent magnet motor for a swimming pool pump according to claim 5, characterized in that: A hydraulic telescopic rod (13) is installed at the upper and lower ends of the push plate (16). Two annular sealing sleeves (14) are fixedly connected to the inner cavity of the motor housing (1) corresponding to the positions of the two hydraulic telescopic rods (13). The two annular sealing sleeves (14) are symmetrically distributed vertically. A sealing ring (15) is rotatably connected to the annular sealing sleeve (14). The piston rod of the hydraulic telescopic rod (13) is fixedly connected to the push plate (16). The pipe part of the hydraulic telescopic rod (13) is fixedly connected to the sealing ring (15) through a conduit.

8. A permanent magnet motor for a swimming pool pump according to claim 1, characterized in that: The annular sealing sleeve (14) located at the top of the inner cavity of the motor housing (1) is connected to the oil supply pipe (11), and the annular sealing sleeve (14) located at the bottom of the inner cavity of the motor housing (1) is connected to the return oil pipe (12). The two annular sealing sleeves (14) are connected by a heat dissipation pipe (204).

9. A permanent magnet motor for a swimming pool pump according to claim 6, characterized in that: A one-way drain valve is installed at one end of the oil supply pipe (11) near the oil cylinder (8), a solenoid valve is installed at one end of the return oil pipe (12) near the oil cylinder (8), and a controller is fixedly installed on the outside of the motor housing (1).

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