A stator fixing structure and a permanent magnet motor

Abstract

This invention discloses a stator fixing structure and a permanent magnet motor, relating to the field of submersible motor technology. It includes a fixing ring and a limiting ring distributed at both ends of the motor stator, surrounded by an insulating liquid. An adaptive repair mechanism is provided on one side of the limiting ring. The insulating liquid forms a circulation section based on the motor stator and the motor housing. The insulating liquid also forms a detection section based on the adaptive repair mechanism and the motor housing. The adaptive repair mechanism collects the resistance value of the detection section and determines the pressure value of the circulation section based on the resistance value of the detection section and the external water pressure of the motor housing. This eliminates the need to stop and maintain the permanent magnet motor. Furthermore, since there is no water leakage in the circulation section, replacing the insulating liquid only requires replacing the insulating liquid in the detection section, eliminating the need to clean the entire equipment inside the motor housing, significantly reducing maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of submersible motor technology, specifically to a stator fixing structure and a permanent magnet motor. Background Technology

[0002] Submersible motors are motors specifically designed for underwater operation. Oil-filled submersible motors have an oil-filled sealed structure with an inner cavity filled with insulating lubricating oil, which can both cool and prevent water from entering. However, since submersible motors must use mechanical seals, when the mechanical seal malfunctions during operation, external water can enter the submersible motor through the mechanical seal, contaminating the insulating lubricating oil and causing the submersible motor to malfunction.

[0003] Existing submersible motors, such as the submersible pump power motor disclosed in Chinese Patent Publication No. CN118713378A, can remedy leaks through a temporary leak-sealing mechanism, but cannot repair the entire internal structure of the submersible motor. The remedy is only a temporary strategy, and the submersible motor still needs to be shut down and inspected in a timely manner, which affects the working efficiency of the submersible motor. Summary of the Invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of this invention is to provide a stator fixing structure and a permanent magnet motor to solve the problem that in the prior art, when a mechanical seal malfunctions and leaks, the temporary leak cannot repair the entire internal structure of the submersible motor, and the submersible motor still needs to be shut down and inspected immediately, which leads to the problem that the submersible motor needs to be inspected as soon as a leak occurs.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] Specifically, the first aspect is to provide a stator fixing structure, including a motor stator, fixing rings and limiting rings distributed at both ends of the motor stator, which are surrounded by insulating liquid. An adaptive repair mechanism is provided on one side of the limiting ring. The insulating liquid forms a circulation part based on the motor stator and the motor housing, and the insulating liquid forms a detection part based on the adaptive repair mechanism and the motor housing. The adaptive repair mechanism collects the resistance value of the detection part and determines the pressure value of the circulation part based on the resistance value of the detection part and the external water pressure of the motor housing.

[0007] As a further aspect of the present invention: the adaptive repair mechanism includes a sealing sleeve, which is fixed on the inner wall of the motor housing. A mechanical seal is provided on one side of the sealing sleeve, and a pressure regulating mechanism is inserted into the surface of the sealing sleeve. A self-draining mechanism is provided on one side of the pressure regulating mechanism, and a linkage mechanism is provided between the mechanical seal and the pressure regulating mechanism.

[0008] As a further aspect of the present invention: a resistance detection cavity is provided inside the sealing sleeve, and the resistance value of the insulating liquid in the resistance detection cavity is used as the resistance value of the detection part.

[0009] As a further aspect of the present invention: the pressure regulating mechanism includes an regulating cylinder, one end of which has an oil cavity, a threaded rod inserted inside the regulating cylinder, a hydraulic rod inserted at the end of the threaded rod near the oil cavity, a sealing piston that fits into the oil cavity fixedly connected to the end of the hydraulic rod, a ball nut seat installed inside the regulating cylinder near the side of the threaded rod, and a compression ring rotatably connected to the end of the threaded rod away from the hydraulic rod.

[0010] As a further aspect of the present invention: the inside of the adjusting cylinder is connected to an anti-disengagement locking tongue by a spring, and the side of the hydraulic rod near the anti-disengagement locking tongue has a reverse tooth groove that matches the anti-disengagement locking tongue.

[0011] As a further aspect of the present invention: the self-discharging mechanism includes a rubber block, a self-discharging cylinder is provided on one side of the rubber block, and an extrusion plate is provided at one end of the rubber block, with one end surface of the extrusion plate abutting against the end face of the extrusion ring.

[0012] As a further aspect of the present invention: the linkage mechanism includes an electromagnetic component, a planetary gear is provided at the bottom of the electromagnetic component, a transmission gear is meshed on one side of the planetary gear, and the transmission gear meshes with the side of the ball nut on the ball nut seat.

[0013] As a further aspect of the present invention: the electromagnetic component includes an electromagnetic actuator, and a movable toothed ring is provided on the bottom surface of the electromagnetic actuator.

[0014] As a further aspect of the present invention: the planetary gear includes a first gear ring, a planetary gear meshing on the side of the first gear ring, a second gear ring meshing on the outer side of the planetary gear, and the top surface of the first gear ring meshing with the bottom surface of the movable gear ring when in contact.

[0015] The second aspect is to provide a permanent magnet motor, including a motor housing, a bottom end cover, a sealing ring, an external power supply, and a motor rotor. The motor housing has the aforementioned stator fixing structure inside, which is used to limit the position of the motor stator.

[0016] The beneficial effects of this invention are:

[0017] In this invention, the insulating liquid in the motor housing is divided into a circulation section and a detection section. Even if water leakage occurs in the motor housing, the self-adaptive repair mechanism can repair and limit the insulating liquid outside the motor stator, ensuring that the motor stator operates in a normal working environment without the need to shut down or repair the permanent magnet motor. Furthermore, since there is no water leakage in the circulation section, when replacing the insulating liquid, only the insulating liquid in the detection section needs to be replaced, without the need to clean the entire equipment in the motor housing, which greatly reduces maintenance costs. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of a stator fixing structure according to the present invention;

[0020] Figure 2 This is a schematic diagram of the limiting ring in a stator fixing structure according to the present invention;

[0021] Figure 3 This is a schematic diagram of the adaptive repair mechanism in a stator fixing structure according to the present invention;

[0022] Figure 4 This is a schematic diagram of the adaptive repair mechanism in a permanent magnet motor according to the present invention;

[0023] Figure 5 This is a schematic diagram of the pressure regulating mechanism and linkage mechanism in a permanent magnet motor according to the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the pressure regulating mechanism in a permanent magnet electric mechanism according to the present invention;

[0025] Figure 7 yes Figure 6 A magnified view of a section at point B in the middle;

[0026] Figure 8 This is a schematic diagram of the pressure regulating mechanism in a permanent magnet motor according to the present invention;

[0027] Figure 9 This is a schematic diagram of the self-discharging mechanism in a permanent magnet motor according to the present invention;

[0028] Figure 10 This is a schematic diagram of the linkage mechanism in a permanent magnet motor according to the present invention;

[0029] Figure 11 This is a schematic diagram of the planetary gear structure in a permanent magnet motor according to the present invention;

[0030] Figure 12 This is a schematic diagram of the structure of the electromagnetic component in a permanent magnet motor according to the present invention;

[0031] Figure 13 This is a schematic diagram of the structure of a permanent magnet motor according to the present invention;

[0032] Figure 14 This is a schematic diagram of the internal structure of a permanent magnet motor according to the present invention;

[0033] Figure 15 This is a partial cross-sectional view of the cooperation between the sealing sleeve and the rotating shaft of a permanent magnet motor according to the present invention;

[0034] Figure 16 This is a schematic diagram of the structure of the motor rotor in a permanent magnet motor according to the present invention;

[0035] Figure 17 yes Figure 1 A magnified view of a portion of point A in the middle.

[0036] Explanation of reference numerals in the attached drawings: 1. Motor housing; 11. Retaining ring; 12. Guide ring; 13. Circulation channel; 14. Motor stator; 2. Bottom end cover; 21. Sealing end cover; 22. Sealing rubber; 23. Pressure balancing component; 24. Pressure hole; 25. Balance spring; 3. Housing storage section; 4. Sealing ring; 5. External power supply; 6. Motor rotor; 61. Rotating shaft; 62. Rotor body; 63. Connecting gear; 64. Concave-convex rotating body; 65. Impeller; 7. Self-adaptive repair mechanism; 71. Sealing sleeve; 72. Mechanical seal; 73. Pressure regulating mechanism; 731. Regulating cylinder; 732. Oil chamber; 7 33. Threaded rod; 734. Hydraulic rod; 735. Sealing piston; 736. Ball bearing nut seat; 737. Extrusion ring; 738. External channel; 739. Anti-loosening locking tongue; 74. Self-discharging mechanism; 741. Rubber block; 742. Self-discharging cylinder; 743. Extrusion plate; 744. Return spring; 745. Limiting rod; 75. Linkage mechanism; 751. Electromagnetic assembly; 7511. Electromagnetic actuator; 7512. Moving gear ring; 752. Planetary gear; 7521. First gear ring; 7522. Planetary gear; 7523. Second gear ring; 753. Transmission gear; 8. Limiting ring; 81. Support column. Detailed Implementation

[0037] 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.

[0038] As one embodiment of the present invention, such as Figures 1-16As shown, a stator fixing structure is disclosed, including fixing rings 11 and limiting rings 8 distributed at both ends of a motor stator 14, surrounded by insulating liquid. An adaptive repair mechanism 7 is provided on one side of the limiting rings 8. The insulating liquid forms a circulation section based on the motor stator 14 and the motor housing 1, and a detection section based on the adaptive repair mechanism 7 and the motor housing 1. The adaptive repair mechanism 7 collects the resistance value of the detection section and determines the pressure value of the circulation section based on the resistance value of the detection section and the external water pressure of the motor housing 1. It should be noted that the stator fixing structure is used to install in a submersible motor and to fix the motor stator 14 in the submersible motor. Since the stator fixing structure operates underwater, when leakage occurs, water will enter the motor housing 1. Internally, this can contaminate the insulating fluid (insulating lubricating oil used to cool the motor stator 14 and lubricate the motor rotor 6; the insulating lubricating oil is selected by those skilled in the art based on the usage environment of the stator fixing structure), affecting the insulating performance of the insulating fluid and causing the motor stator 14 to short-circuit and burn out, thus damaging the entire motor. Therefore, in the event of a leak, the adaptive repair mechanism 7 can promptly repair the internal environment of the motor housing 1, preventing water contamination of the insulating fluid and ensuring that the motor stator 14 and motor rotor 6 can still self-repair and operate normally even in the event of a leak. Specifically, during the operation of the motor stator 14 and motor rotor 6, the adaptive repair mechanism 7 collects the resistance value of the insulating fluid in the detection section. The resistivity of the insulating fluid is typically within a certain range. Therefore, a high-voltage source and a weak current detection circuit are built into the adaptive repair mechanism 7 to calculate the resistance value of the insulating liquid according to Ohm's law.

[0039] When a leak occurs, external water will enter the insulating liquid, causing the resistance value of the insulating liquid to drop significantly. Therefore, the change in the resistance value of the insulating liquid is used to monitor whether water outside the motor housing 1 has entered the interior of the motor housing 1 through a leak, resulting in contamination of the insulating liquid.

[0040] The adaptive repair mechanism 7 monitors the resistance value of the insulating fluid in the detection section through a detection circuit. A pressure sensor is installed outside the motor housing 1 to collect the external water pressure of the motor housing 1. A resistance threshold for the detection section is preset (the resistance threshold is adaptively selected according to the type of insulating fluid and the external environment of the motor housing 1). When the real-time collected resistance value of the detection section is less than the resistance threshold, the adaptive repair mechanism 7 is activated. Specifically, the adaptive repair mechanism 7 increases the pressure value of the insulating fluid inside the motor housing 1 (the pressure value of the insulating fluid in the circulation section). It should be noted that those skilled in the art can preset the pressure difference for automatic leakage of the insulating fluid according to the adaptive repair mechanism 7. This is because a pressure-bearing pressure is set on the side of the motor housing 1 near the adaptive repair mechanism 7. A rubber block 741 acts along the axial direction of the motor rotor 6. A through hole is opened on the rubber block 741 (the opening direction of the through hole is along the radial direction of the motor rotor 6). Due to the extrusion force on the rubber block 741, the through hole on the rubber block 741 is also extruded. When the motor stator 14 and the motor rotor 6 are working normally, the through hole will not connect the internal and external environments of the motor housing 1. When the pressure of the internal environment of the motor housing 1 is greater than the pressure of the external environment of the motor housing 1, and the pressure difference reaches a threshold, the insulating liquid in the internal environment of the motor housing 1 will be automatically discharged into the external environment of the motor housing 1 through the through hole. The pressure difference threshold is obtained by adaptively determining by those skilled in the art based on the size of the rubber block 741 and the through hole.

[0041] The pressure difference between the insulating liquid and the external water pressure must reach a preset pressure difference threshold. This will allow the insulating liquid in the circulation section to enter the detection section, preventing the contaminated insulating liquid in the detection section from flowing back into the circulation section and contaminating the insulating liquid in the circulation section.

[0042] As the insulating liquid in the circulation section continuously enters the detection section, it will continuously repair the insulating liquid in the detection section. When the resistance value of the insulating liquid in the detection section is collected by the detection circuit and restored to the resistance threshold or above, it means that the contaminated insulating liquid in the detection section has been completely repaired, ensuring that the motor stator 14 and motor rotor 6 can still be automatically repaired even in the event of water leakage, and then continue to work in a normal environment.

[0043] It should be noted that the circulation section and detection section of the insulating liquid are adapted to the space inside the motor housing 1 by those skilled in the art. However, it is ensured that the volume of the insulating liquid in the detection section is much smaller than the volume of the insulating liquid in the circulation section. Specifically, the volume of the insulating liquid in the detection section can be reduced by setting a protrusion on the side wall of the motor housing 1, so that the volume of the insulating liquid in the detection section is at least less than or equal to one percent of the volume of the insulating liquid in the circulation section. When it is necessary to repair the insulating liquid in the detection section, it is only necessary to reduce the volume of the insulating liquid in the circulation section by one percent to replace the insulating liquid in the detection section. A storage cavity for storing insulating liquid can be pre-arranged inside the motor housing 1. The volume of the storage cavity can be N times the volume of the insulating liquid in the detection section. The insulating liquid in the storage cavity is pushed by a hydraulic push rod to enter the circulation section to replenish the insulating liquid in the circulation section.

[0044] The positions of the storage chamber and the hydraulic storage chamber rod can be arbitrarily selected by those skilled in the art based on the space inside the motor housing 1, as long as it does not affect the operation of the motor stator 14 and the motor rotor 6.

[0045] like Figures 1-4As shown, the adaptive repair mechanism 7 includes a sealing sleeve 71, which is fixed to the inner wall of the motor housing 1. A mechanical seal 72 is provided on one side of the sealing sleeve 71, and a pressure regulating mechanism 73 is inserted into the surface of the sealing sleeve 71. A self-draining mechanism 74 is provided on one side of the pressure regulating mechanism 73. A linkage mechanism 75 is provided between the mechanical seal 72 and the pressure regulating mechanism 73. It should be noted that the sealing sleeve 71 is sealed and fixedly connected to the inner wall of the motor housing 1. The sealing sleeve 71 restricts the position of one end of the motor stator 14 by a limiting ring 8, while the fixing ring 11 restricts the other end of the motor stator 14, thereby fixing the motor stator 14 to the motor housing 1. Inside, the mechanical seal 72 isolates the internal environment of the motor housing 1 from the external environment of the motor housing 1. Specifically, it isolates the insulating liquid inside the motor housing 1 from the water outside the motor housing 1, preventing water from entering the motor housing 1 and contaminating the insulating liquid. The type of mechanical seal 72 is selected by those skilled in the art based on the motor housing 1 and the motor rotor 6. The pressure regulating mechanism 73 is fixed to the sealing sleeve 71. The pressure regulating mechanism 73 is used to regulate the pressure value of the insulating liquid in the circulation section. Specifically, additional insulating liquid is stored inside the pressure regulating mechanism 73. When the resistance value of the insulating liquid in the detection section is less than the electrical resistance value, the pressure regulating mechanism 73 will adjust the pressure of the insulating liquid in the circulation section. When the resistance threshold is reached, external water from the motor housing 1 enters the detection section through the mechanical seal 72. At this time, the pressure regulating mechanism 73 can be activated. The pressure regulating mechanism 73 can pressurize the additional insulating liquid stored inside into the circulation section, thereby increasing the pressure value of the insulating liquid in the circulation section. When the pressure difference between the insulating liquid in the circulation section and the external water pressure of the motor housing 1 is greater than the pressure difference threshold, the insulating liquid in the circulation section will slowly enter the detection section. On the one hand, this prevents the contaminated insulating liquid in the detection section from flowing back into the circulation section, and on the other hand, it can repair the contaminated insulating liquid in the detection section. This is because the self-draining mechanism 74 is designed... When the pressure difference between the insulating liquid in the circulation section and the external water pressure of the motor housing 1 exceeds the pressure difference threshold, the insulating liquid in the detection section will slowly leak through the self-draining mechanism 74. In this way, the contaminated insulating liquid in the detection section will slowly decrease through the self-draining mechanism 74, and the insulating liquid in the circulation section will slowly enter the detection section to repair the contaminated insulating liquid in the detection section. The pressure regulating mechanism 73 is powered by the linkage mechanism 75. Specifically, the motor rotor 6 transmits power to the pressure regulating mechanism 73 through the linkage mechanism 75, thereby driving the pressure regulating mechanism 73 to regulate the pressure of the insulating liquid in the circulation section.

[0046] The sealing sleeve 71 has a resistance detection chamber inside, and the resistance value of the insulating liquid in the resistance detection chamber is used as the resistance value of the detection unit. Specifically, a resistance detection circuit is preset in the resistance detection chamber, which is used to collect the resistance value of the insulating liquid in the resistance detection chamber in real time.

[0047] The pressure regulating mechanism 73 includes an regulating cylinder 731. A support column 81 is fixedly connected to a limiting ring 8. The limiting ring 8 is fixedly connected to the end face of the regulating cylinder 731 via the support column 81. One end of the regulating cylinder 731 has an oil cavity 732. A threaded rod 733 is inserted inside the regulating cylinder 731. A hydraulic rod 734 is inserted at the end of the threaded rod 733 near the oil cavity 732. A sealing piston 735 that matches the oil cavity 732 is fixedly connected to the end of the hydraulic rod 734. A ball nut seat 736 is installed on the side of the regulating cylinder 731 near the threaded rod 733. A compression ring 737 is rotatably connected to the end of the threaded rod 733 away from the hydraulic rod 734. Figure 6 As shown, the ball nut seat 736 is fixed to the inner middle position of the adjusting cylinder 731 by bolts. A ball nut is rotatably connected to the inner side of the ball nut seat 736. The ball nut is nested on the outer side of the threaded rod 733. When the ball nut rotates, the engagement between the ball nut and the threaded rod 733 drives the threaded rod 733, causing it to move along the axial direction. Since a hydraulic rod 734 and a sealing piston 735 are provided at one end of the threaded rod 733, when the threaded rod 733 moves downward along the adjusting cylinder 731 under the drive of the ball nut (with... Figure 6 (Based on the placement position of the adjusting cylinder 731), the threaded rod 733 drives the sealing piston 735 through the hydraulic rod 734, causing the sealing piston 735 to squeeze the insulating liquid in the oil chamber 732 and force the insulating liquid in the oil chamber 732 into the circulation section, increasing the pressure of the insulating liquid (insulating lubricating oil) in the circulation section, so that the insulating liquid in the circulation section can slowly enter the detection section, preventing the contaminated insulating liquid in the detection section from entering the circulation section and affecting the operation of the motor stator 14 and the motor rotor 6;

[0048] It should be noted that the connection between the circulation section and the detection section is located on the side surface of the motor rotor 6, and the average thickness of the connection is set to 30 micrometers to 80 micrometers. Based on the thickness of the connection and the flow rate and viscosity of the insulating liquid, the flow of the insulating liquid between the circulation section and the detection section is laminar rather than turbulent. Therefore, when the circulation section slowly supplies the insulating liquid to the detection section, it can be ensured that the contaminated insulating liquid in the detection section will not flow back into the circulation section.

[0049] like Figure 7As shown, the inside of the adjusting cylinder 731 is connected to an anti-disengagement tongue 739 via a spring. A countersunk groove matching the anti-disengagement tongue 739 is provided on the side of the hydraulic rod 734 near the anti-disengagement tongue 739. Under the spring force, the anti-disengagement tongue 739 abuts against the side of the hydraulic rod 734. Since the countersunk groove on the side of the hydraulic rod 734 near the anti-disengagement tongue 739 allows the anti-disengagement tongue 739 to embed itself in the countersunk groove, the engagement of the anti-disengagement tongue 739 and the countersunk groove prevents the sealing piston 735 from moving upwards (to...). Figure 6 The position of the adjusting cylinder 731 is taken as the reference. In this way, even if the threaded rod 733 stops applying force to the hydraulic rod 734, the hydraulic rod 734 can still stabilize the position of the sealing piston 735 through the cooperation of the anti-disengagement tongue 739 and the reverse tooth groove, preventing the insulating liquid in the circulation part from entering the oil chamber 732, which would reduce the insulating liquid in the circulation part. An external channel 738 is opened on the side of the adjusting cylinder 731.

[0050] like Figure 8 and Figure 9 As shown, the self-discharging mechanism 74 includes a rubber block 741, a self-discharging cylinder 742 on one side of the rubber block 741, and a compression plate 743 at one end of the rubber block 741. One end surface of the compression plate 743 abuts against the end face of the compression ring 737. A limit rod 745 is inserted through the inner side of the return spring 744 to limit its movement, ensuring that the return spring 744 moves along the axis of the limit rod 745. It should be noted that... Figure 9 The size of the return spring 744 is exaggerated. The specific size of the return spring 744 is adaptively selected by those skilled in the art based on the required elastic force of the extrusion plate 743. When the threaded rod 733 moves downward, it will drive the extrusion ring 737 to move downward synchronously, and the extrusion ring 737 will act on the top surface of the extrusion plate 743 (within...). Figure 9Using the spatial position of the extrusion plate 743 as a reference, the extrusion plate 743 is pressed downwards. As the extrusion plate 743 moves downwards, it releases its pressure on the rubber block 741, relieving the pressure on the self-draining cylinder 742 on the rubber block 741. It is important to note that a circular hole penetrates the self-draining cylinder 742, and the direction of the circular hole is serrated. When the pressure of the insulating liquid in the detection unit increases, the insulating liquid in the detection unit will enter the circular hole in the self-draining cylinder 742 and be discharged into the outer casing for storage through the circular hole. Part 3, the housing 3 includes a housing and an oil bladder disposed inside the housing. The insulating liquid discharged by the detection unit is collected by the oil bladder. The discharge time of the insulating liquid in the circular hole is determined based on the volume of the oil cavity 732, the diameter of the circular hole, and the insulating liquid pressure of the detection unit. This discharge time can be adapted to the maintenance cycle time of the permanent magnet motor. For example, during normal operation of the permanent magnet motor, its maintenance cycle time is t, that is, the permanent magnet motor needs to be maintained once after continuous operation for t time to ensure the normal operation of the permanent magnet motor.

[0051] When the permanent magnet motor reaches its maintenance cycle, it can be removed from underwater. During this process, since the insulating liquid in the circulation section is continuously supplied to the detection section, the insulating liquid in the circulation section does not need to be replaced. Only the contaminated insulating liquid in the detection section and oil bladder needs to be replaced. Furthermore, since the insulating liquid in the circulation section is not contaminated, the motor stator 14 and motor rotor 6, where the circulation section is located, are also under normal operating conditions, which greatly enhances the protection effect on the permanent magnet motor.

[0052] like Figure 10 , Figure 11 and Figure 12 As shown, the linkage mechanism 75 includes an electromagnetic component 751. A planetary gear 752 is provided at the bottom of the electromagnetic component 751. A transmission gear 753 meshes with one side of the planetary gear 752. The transmission gear 753 meshes with the side of the ball nut on the ball nut seat 736. When the electromagnetic component 751 is opened, the electromagnetic component 751 can connect the motor rotor 6 to the planetary gear 752. In this way, the rotating motor rotor 6 can transmit power to the planetary gear 752, and the planetary gear 752 can then transmit power to the transmission gear 753. Since the transmission gear 753 meshes with the side of the ball nut on the ball nut seat 736, the rotating transmission gear 753 can drive the ball nut to rotate. The rotating ball nut can cooperate with the threaded rod 733 to move the threaded rod 733 along the axial direction of the threaded rod 733. The transmission gear 753 is installed in the external channel 738.

[0053] The electromagnetic component 751 includes an electromagnetic actuator 7511, and a movable toothed ring 7512 is provided on the bottom surface of the electromagnetic actuator 7511. It should be noted that the electromagnetic actuator 7511 is fixed to the end face of the mechanical seal 72. Since the electromagnetic actuator 7511 includes a rotating part and a fixed part, the electromagnetic actuator 7511 can be fixed to the fixed part of the mechanical seal 72. The fixed part is fixedly connected to the motor housing 1 by bolts, while the rotating part is directly fixedly connected to the side of the motor rotor 6. In this way, when the motor rotor 6 rotates, the motor housing 1 is sealed by the friction fluid film formed between the rotating part and the fixed part.

[0054] The specifications of the mechanical seal 72 are adapted by those skilled in the art based on the internal space of the motor housing 1. The electromagnetic actuator 7511 is powered by an external power supply 5. When the external power supply 5 provides electrical energy to the electromagnetic actuator 7511, the electromagnetic actuator 7511 converts electrical energy into magnetic force, which drives the movable gear ring 7512. The movable gear ring 7512 is nested on the side of the motor rotor 6, and a limit key is provided between it and the motor rotor 6. The limit key is used to limit the radial position between the movable gear ring 7512 and the motor rotor 6. In this way, when the motor rotor 6 rotates, the movable gear ring 7512 can be driven to rotate synchronously through the limit key.

[0055] The planetary gear 752 includes a first gear ring 7521, with a planetary gear 7522 meshing on the side of the first gear ring 7521 and a second gear ring 7523 meshing on the outer side of the planetary gear 7522. The top surface of the first gear ring 7521 meshes with the bottom surface of the movable gear ring 7512 when they are in contact. When the electromagnetic actuator 7511 pushes the movable gear ring 7512 with magnetic force, the movable gear ring 7512 will mesh with the first gear ring 7521. The rotating movable gear ring 7512 will drive the first gear ring 7521 to rotate. Since the planetary gear 7522 is meshed on the side of the first gear ring 7521, the rotating first gear ring 7521 can drive the planetary gear 7522, and the planetary gear 7522 will drive the second gear ring 7523. The second gear ring 7523 will drive the ball nut to rotate through the transmission gear 753.

[0056] It should be noted that when the electromagnetic actuator 7511 is shut down, the magnetic force applied by the electromagnetic actuator 7511 to the moving gear ring 7512 will disappear, and the transmission effect between the motor rotor 6 and the planetary gear 752 will disappear.

[0057] Under the action of the return spring 744, the extrusion plate 743 will extrude the rubber block 741 again, causing the round hole on the rubber block 741 to close.

[0058] As one embodiment of the present invention, such as Figures 1-16As shown, a permanent magnet motor is disclosed, including a motor housing 1, a bottom end cover 2, a housing storage part 3, a sealing ring 4, an external power supply 5, a motor stator 14, and a motor rotor 6. The motor housing 1 has the aforementioned stator fixing structure inside, used to limit the position of the motor stator 14. It should be noted that the motor rotor 6 includes a rotating shaft 61, with a rotor body 62 nested on the side of the rotating shaft 61. One end of the rotating shaft 61 is fixedly connected to a mating gear 63, and the other end of the rotating shaft 61 is nested with an impeller 65. A concave-convex rotating body 64 is nested on the side of the rotating shaft 61 near the sealing sleeve 71. The sealing sleeve 71 and the concave-convex rotating body 64 fit together, and there is a gap of 20 to 50 micrometers between the sealing sleeve 71 and the concave-convex rotating body 64. A circulation channel 13 is provided inside the motor housing 1. A guide ring 12 is provided in the inner cavity of the motor housing 1 corresponding to the bottom of the impeller 65. The guide ring 12 can play a guiding role to ensure that the insulating liquid can be forced into the circulation channel 13 when the impeller 65 rotates. When the rotating shaft 61 rotates... When rotating, the rotating shaft 61 will drive the impeller 65 to rotate synchronously. The rotating impeller 65 can press the insulating liquid into the circulation channel 13, so that the insulating liquid circulates between the circulation channel 13, the motor stator 14 and the rotor body 62. The bottom end cover 2 includes a sealing end cover 21. A sealing rubber 22 is provided on the inner side of the sealing end cover 21. A pressure balancing component 23 is provided on the inner side of the sealing end cover 21 corresponding to the side of the sealing rubber 22. The pressure balancing component 23 is used to support the outer side of the sealing rubber 22 (equivalent to the internal and external space of the motor housing 1). A balance spring 25 is also nested on the outer side of the pressure balancing component 23. A pressure hole 24 is passed through the inner side of the pressure balancing component 23. The external water pressure can be applied to the outer side of the sealing rubber 22 through the pressure hole 24 to achieve the effect of squeezing the insulating liquid in the circulation part. The balance spring 25 acts on the sealing rubber 22 through the pressure balancing component 23, so that the sealing rubber 22 further squeezes the insulating liquid in the circulation part, so that the pressure of the insulating liquid in the circulation part is slightly higher than the water pressure outside the motor housing 1.

[0059] When the permanent magnet motor is working, if external water enters the detection section through the mechanical seal 72 (this is because the entire exterior of the motor housing 1 is only accessible through the gap in the mechanical seal 72), the resistance of the insulating liquid in the detection section will change drastically. This can be identified and processed by setting a detection circuit in the detection section. Then, the adaptive repair mechanism 7 repairs and restricts the insulating liquid in the detection section. If the resistance of the insulating liquid in the detection section returns to the normal value, it means that the water in the insulating liquid in the detection section has been completely drained, and the repair of the detection section has been completed. If the resistance of the detection section remains abnormal, the adaptive repair mechanism 7 can restrict the insulating liquid in the detection section until the permanent magnet motor reaches the next maintenance cycle, ensuring that the motor stator 14 and motor rotor 6 in the permanent magnet motor are always in a normal working environment.

[0060] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A stator fixing structure, characterized in that, include: Motor stator; The fixed rings and limiting rings distributed at both ends of the motor stator are surrounded by insulating liquid; An adaptive repair mechanism is located on one side of the limiting ring; The insulating liquid forms a circulation section based on the motor stator and the motor housing, and the insulating liquid forms a detection section based on the adaptive repair mechanism and the motor housing; The adaptive repair mechanism collects the resistance value of the detection unit and determines the pressure value of the circulation unit based on the resistance value of the detection unit and the external water pressure of the motor housing. The adaptive repair mechanism includes a sealing sleeve, which is fixed to the inner wall of the motor housing. A mechanical seal is provided on one side of the sealing sleeve. A pressure regulating mechanism is inserted into the surface of the sealing sleeve. A self-draining mechanism is provided on one side of the pressure regulating mechanism. A linkage mechanism is provided between the mechanical seal and the pressure regulating mechanism. The sealing sleeve has a resistance detection cavity inside, and the resistance value of the insulating liquid in the resistance detection cavity is used as the resistance value of the detection part. The pressure regulating mechanism includes an regulating cylinder with an oil chamber at one end. A threaded rod is inserted inside the regulating cylinder, and a hydraulic rod is inserted at the end of the threaded rod near the oil chamber. A sealing piston that fits into the oil chamber is fixedly connected to the end of the hydraulic rod. A ball nut seat is installed inside the regulating cylinder near the side of the threaded rod, and a compression ring is rotatably connected to the end of the threaded rod away from the hydraulic rod. The inside of the regulating cylinder is connected to an anti-disengagement locking tongue by a spring, and the side of the hydraulic rod near the anti-disengagement locking tongue has a reverse tooth groove that matches the anti-disengagement locking tongue. The self-discharging mechanism includes a rubber block, a self-discharging cylinder is provided on one side of the rubber block, and an extrusion plate is provided at one end of the rubber block, with one end surface of the extrusion plate abutting against the end face of the extrusion ring.

2. The stator fixing structure according to claim 1, characterized in that, The linkage mechanism includes an electromagnetic component, a planetary gear is provided at the bottom of the electromagnetic component, a transmission gear is meshed on one side of the planetary gear, and the transmission gear meshes with the side of the ball nut on the ball nut seat.

3. The stator fixing structure according to claim 2, characterized in that, The electromagnetic component includes an electromagnetic actuator, and a movable toothed ring is provided on the bottom surface of the electromagnetic actuator.

4. The stator fixing structure according to claim 3, characterized in that, The planetary gear includes a first gear ring, a planetary gear meshing on the side of the first gear ring, a second gear ring meshing on the outer side of the planetary gear, and the top surface of the first gear ring meshing with the bottom surface of the movable gear ring when in contact.

5. A permanent magnet motor, comprising a motor housing, a bottom end cover, a sealing ring, an external power supply, and a motor rotor, characterized in that, The motor housing is provided with a stator fixing structure as described in any one of claims 1-4, for limiting the position of the motor stator.

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