electric machine

Abstract

The utility model relates to motor technical field, specifically disclose motor. The motor includes the casing with installation cavity and is located in the rotor module and stator module of installation cavity, and the rotor module includes rotor back iron and the main shaft of the wear interface in rotor back iron, and the rotor module can rotate around the axis of main shaft, and the stator module includes the tubular magnet, the isolation sleeve, the magnetism adjusting ring and motor stator of the sleeve connection in proper order from inside to outside, the tubular magnet includes the several N pole strip permanent magnet and several S pole strip permanent magnet of the circumferential staggered arrangement of around the axis of main shaft, and the one end of isolation sleeve is recessed with the accommodation groove, and the other end coaxially convex has Wang Lianye vein structure, and the magnetism adjusting ring includes the inner connecting bridge, a plurality of magnet conductors and a plurality of non -magnetic body, and all magnet conductors and all non -magnetic body circumferential staggered arrangement around the axis of main shaft, and every two adjacent magnet conductor is connected through the inner connecting bridge in the one end close to main shaft. The motor improves operation reliability and power density through the optimization design to structure.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to motors. Background Technology

[0002] With the increasing demands for process safety and continuous operation in industries such as petrochemicals, nuclear power, and new energy, pumps used for conveying flammable, explosive, highly toxic, or high-value liquid media are increasingly evolving towards higher pressure ratings and higher sealing reliability. In these applications, the drive motor typically needs to be completely isolated from the process media being conveyed to prevent media leakage from causing safety accidents or environmental pollution. Therefore, using an isolation sleeve to physically separate the motor rotor cavity from the stator cavity has become one of the core technical means to ensure zero media leakage.

[0003] Under high-pressure operating conditions, the isolation sleeve, as a key thin-walled component bearing the internal and external pressure difference, directly determines the pressure-bearing capacity and service life of the entire drive unit through its structural integrity and dimensional stability. During operation, the isolation sleeve must withstand high hydrostatic pressure from the process side while maintaining the geometric accuracy of the magnetic field transmission path between the rotor and stator. This places extremely stringent requirements on its material selection, wall thickness design, and support method. On the one hand, while increasing the wall thickness of the isolation sleeve can improve its pressure-bearing strength, it leads to an increase in the magnetic circuit air gap and a decrease in electromagnetic efficiency. On the other hand, if the wall thickness is reduced to pursue electromagnetic performance, the thin-walled cylindrical structure is prone to radial instability or local buckling deformation under high-pressure conditions, thereby affecting the alignment accuracy and operating clearance of the rotating components.

[0004] Furthermore, the end transition region and bottom of the isolation sleeve often become sensitive areas of stress concentration under high-pressure media. Due to the geometric discontinuity and lack of effective external radial constraints in this region, the risk of local plastic deformation or fatigue crack initiation is significantly higher than that of the main body of the sleeve. How to provide reliable rigid support for the sleeve wall and end within a limited spatial envelope, while ensuring the efficient and stable operation of the magnetic field modulation mechanism, has become a key challenge in the design of high-voltage shielded motors. Utility Model Content

[0005] The purpose of this invention is to provide a motor to improve operational reliability and power density.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An electric motor includes a housing, a mover module, and a stator module. The housing has a mounting cavity. The mover module is arranged along the working direction and is located within the mounting cavity. The mover module includes a main shaft and a rotor back iron. The mover module is rotatable about the axis of the main shaft. A portion of the main shaft extends out of the mounting cavity. The rotor back iron has a through-hole extending along the working direction, and the main shaft passes through the through-hole. The stator module is located within the mounting cavity and includes a tubular magnet, an isolation sleeve, a magnetic adjusting ring, and a motor stator, which are sequentially fitted from the inside out. The inner wall of the tubular magnet is in contact with the side wall of the rotor back iron. The tubular magnet includes several N-pole strip permanent magnets and several S-pole strip permanent magnets arranged circumferentially around the axis of the main shaft. One end of the isolation sleeve is recessed with a receiving groove, and the outer wall of the tubular magnet is in contact with the side wall of the receiving groove. The other end of the isolation sleeve is coaxially protruded with a Victoria amazonica leaf vein structure. The magnetic adjustment ring includes an inner connecting bridge, multiple magnetic conductors and multiple non-magnetic conductors. All the magnetic conductors and all the non-magnetic conductors are arranged circumferentially around the axis of the main shaft. Every two adjacent magnetic conductors are connected at the end closest to the main shaft through the inner connecting bridge, and the inner connecting bridge is in contact with the outer wall of the isolation sleeve.

[0008] As an optional technical solution for the motor, the moving module further includes multiple Halebeck arrays. The moving module is rotatable around the axis of the main shaft. All the Halebeck arrays are evenly spaced around the axis of the main shaft. The Halebeck arrays pass through the rotor back iron and extend along the working direction. Each Halebeck array includes a first permanent magnet, two second permanent magnets, and two third permanent magnets. The first permanent magnet is located between the two second permanent magnets. The first permanent magnet and the two second permanent magnets are evenly spaced around the axis of the shaft hole. The magnetization direction of the first permanent magnet is radially away from the shaft hole, and the magnetization direction of the second permanent magnets is radially closer to the shaft hole. Each third permanent magnet is located between the first permanent magnet and one of the second permanent magnets. In the direction away from the shaft hole, the width direction of the third permanent magnet gradually approaches the first permanent magnet, and the magnetization direction of the third permanent magnet is radially closer to the first permanent magnet.

[0009] As an optional technical solution for the motor, the first permanent magnet, the second permanent magnet, and the third permanent magnet are all rectangular parallelepipeds.

[0010] As an optional technical solution for the motor, the first permanent magnet, the second permanent magnet and the third permanent magnet have rounded corners on their sides in the working direction.

[0011] As an optional technical solution for the motor, the inner connecting bridge and the sidewalls of the two adjacent magnetic conductors form an assembly through slot, and the non-magnetic conductor can be fitted into the assembly through slot.

[0012] As an optional technical solution for the motor, the end of the inner connecting bridge is fixedly connected to a magnetic adjustment flange, the non-magnetic body has a positioning hole extending along the working direction, and the magnetic adjustment ring also includes a stud, which passes through the positioning hole and is detachably connected to the magnetic adjustment flange.

[0013] As an optional technical solution for the motor, the magnetic conductor is formed by stacking silicon steel sheets.

[0014] As an optional technical solution for the motor, the isolation sleeve is made of epoxy resin.

[0015] As an optional technical solution for the motor, the housing also includes a motor end cover, a motor housing, and a plurality of first locking pins. The motor housing is recessed with a mounting groove, the groove wall of which, together with the motor end cover, forms the mounting cavity. The main shaft passes through the motor end cover, and the first locking pins pass through the motor end cover and are detachably connected to the motor housing.

[0016] As an optional technical solution for the motor, the end of the inner connecting bridge is fixedly connected to a magnetic adjustment flange, and the housing also includes a second locking pin, which passes through the motor end cover and is detachably connected to the magnetic adjustment flange.

[0017] The beneficial effects of this utility model are:

[0018] This motor modulates the traditional field-modulated motor's dual-air-gap structure (i.e., air gaps on both the inner and outer sides of the magnetic ring) to a single-air-gap structure on the inner side. This single-air-gap construction provides the isolation sleeve with continuous radial rigid support from the magnetic ring, fundamentally suppressing the central bulging deformation caused by lack of support under high-pressure conditions. The physical support provided by the inner connecting bridge significantly enhances the radial stiffness of the isolation sleeve, effectively preventing scraping failures caused by deformation. This significantly improves the motor's operational stability and overall equipment lifespan under high-pressure environments, ensuring pressure resistance and operational reliability. Furthermore, the protruding Victoria amazonica leaf vein structure at the end of the isolation sleeve is not a simple geometric change, but rather draws inspiration from the mechanical load-bearing principle of the Victoria amazonica leaf vein network distribution. This biomimetic structure is placed at the connection end between the isolation sleeve and the magnetic adjustment ring, specifically strengthening the structural strength of the bottom of the isolation sleeve and the connection transition area. This design effectively disperses the stress generated by the high-pressure fluid on the bottom of the sleeve, avoiding stress concentration and the resulting deformation concentration problems. This results in a secondary increase in the overall pressure resistance threshold of the isolation sleeve. Combined with the radial support of the inner connecting bridge, the sidewalls and ends of the isolation sleeve are comprehensively reinforced, thus constructing a highly reliable sealed isolation chamber capable of adapting to extreme working conditions such as high pressure. Simultaneously, the tubular magnet in the rotor module is composed of alternating N-pole and S-pole strip permanent magnets, and is attached to the rotor back iron sidewall. This structure, working in conjunction with the outer magnetic adjustment ring and the motor stator, forms an efficient magnetic field modulation path. Because of the gapless contact between the isolation sleeve and the inner connecting bridge, the air gap size of the magnetic circuit in this area can be precisely controlled and kept stable, reducing magnetic reluctance fluctuations caused by structural deformation. Therefore, the above structure improves mechanical pressure resistance without sacrificing the electromagnetic performance of the motor. On the contrary, through the integration and stabilization of the structure, it ensures the stability of the magnetic field modulation process and efficient power output of the motor under high-voltage conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the motor provided in an embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of the motor provided in an embodiment of this utility model;

[0021] Figure 3 This is a cross-sectional view of the motor provided in an embodiment of this utility model;

[0022] Figure 4 This is a top view of the motor provided in an embodiment of the present utility model;

[0023] Figure 5 yes Figure 4 Cross-sectional view of plane AA;

[0024] Figure 6 This is a top view of the rotor back iron provided in an embodiment of this utility model;

[0025] Figure 7 yes Figure 6 A magnified view of part B in the image;

[0026] Figure 8 This is a schematic diagram of the structure of the isolation sleeve provided in this embodiment of the utility model;

[0027] Figure 9 This is a cross-sectional view of the adjusting ring provided in an embodiment of this utility model.

[0028] In the picture:

[0029] 100. Motor end cover; 200. Motor housing; 310. N-pole strip permanent magnet; 320. S-pole strip permanent magnet; 400. Rotor back iron; 410. Shaft hole; 420. First permanent magnet; 430. Second permanent magnet; 440. Third permanent magnet; 500. Main shaft; 600. Isolation sleeve; 610. Victoria amazonica leaf vein structure; 700. Magnetic adjusting ring; 710. Inner connecting bridge; 720. Magnetic conductor; 730. Non-magnetic conductor; 731. Positioning hole; 740. Magnetic adjusting flange; 800. Motor stator;

[0030] 910. Second locking pin; 920. Bearing. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] like Figures 1 to 9As shown, this utility model provides a motor, including a housing, a mover module, and a stator module; the housing has a mounting cavity; the mover module is arranged along the working direction X and is located within the mounting cavity, the mover module includes a main shaft 500 and a rotor back iron 400, the mover module is rotatable around the axis of the main shaft 500, a portion of the main shaft 500 extends out of the mounting cavity, the rotor back iron 400 has a through-hole 410 extending along the working direction X, the main shaft 500 passes through the through-hole 410; the stator module is located within the mounting cavity, the stator module includes a tubular magnet, an isolation sleeve 600, a magnetic adjusting ring 700, and a motor stator 800 sequentially sleeved from the inside out, the inner wall of the tubular magnet is in contact with the side wall of the rotor back iron 400, the tubular magnet... The device includes several N-pole strip permanent magnets 310 and several S-pole strip permanent magnets 320 arranged circumferentially around the axis of the main shaft 500. One end of the isolation sleeve 600 is recessed with a receiving groove, and the outer wall of the tubular magnet is in contact with the side wall of the receiving groove. The other end of the isolation sleeve 600 is coaxially protruded with a Victoria amazonica leaf vein structure 610. The magnetic ring 700 includes an inner connecting bridge 710, a plurality of magnetic conductors 720 and a plurality of non-magnetic conductors 730. All the magnetic conductors 720 and all the non-magnetic conductors 730 are arranged circumferentially around the axis of the main shaft 500. Every two adjacent magnetic conductors 720 are connected by the inner connecting bridge 710 at the end near the main shaft 500. The inner connecting bridge 710 is in contact with the outer wall of the isolation sleeve 600.

[0036] Specifically, a positioning key is embedded on the main shaft 500, and the rotor back iron 400 is fixedly connected to the main shaft 500 through the positioning key; a sealing gasket is provided between the isolation sleeve 600 and the magnetic adjusting ring 700, and the setting of the sealing gasket ensures the overall sealing of the isolation sleeve 600.

[0037] This motor, by configuring the stator module as a series of tubular magnets, an isolation sleeve 600, a magnetic adjusting ring 700, and a motor stator 800 nested from the inside out, and by limiting the inner connecting bridge 710 of the magnetic adjusting ring 700 to contact the outer wall of the isolation sleeve 600, transforms the traditional double-air-gap structure of the magnetic field modulation motor (i.e., both the inner and outer sides of the magnetic adjusting ring 700 are air gaps) into a single-air-gap structure on the inner side. This single-air-gap construction provides the isolation sleeve 600 with continuous radial rigid support from the magnetic adjusting ring 700, fundamentally suppressing the central bulging deformation of the isolation sleeve 600 under high-pressure conditions due to lack of support. The physical support provided by the inner connecting bridge 710 greatly enhances the radial stiffness of the isolation sleeve 600, effectively preventing scraping failure caused by deformation, significantly improving the motor's operational stability and overall equipment lifespan under high-pressure environments, and ensuring pressure resistance and operational reliability. Moreover, the Victoria amazonica leaf vein structure 610 protruding from the end of the isolation sleeve 600 is not a simple geometric change, but rather draws on the mechanical load-bearing principle of the Victoria amazonica leaf vein network distribution. This biomimetic structure is placed at the connection end between the isolation sleeve 600 and the magnetic adjustment ring 700, specifically strengthening the structural strength of the bottom of the isolation sleeve 600 and the connection transition area. This design effectively disperses the stress generated by the high-pressure fluid on the bottom of the sleeve, avoiding stress concentration and the resulting deformation concentration problems. This results in a secondary improvement in the overall pressure resistance threshold of the isolation sleeve 600. Combined with the radial support of the inner connecting bridge 710, the sidewalls and ends of the isolation sleeve 600 are comprehensively reinforced, thus constructing a highly reliable sealed isolation chamber capable of adapting to extreme working conditions such as high pressure. Meanwhile, the tubular magnet in the rotor module is composed of alternating N-pole strip permanent magnets 310 and S-pole strip permanent magnets 320, and is attached to the sidewall of the rotor back iron 400. This structure, working in conjunction with the outer magnetic adjustment ring 700 and the motor stator 800, forms a highly efficient magnetic field modulation path. Due to the gapless contact between the isolation sleeve 600 and the inner connecting bridge 710, the air gap size of the magnetic circuit in this area can be precisely controlled and kept stable, reducing magnetic reluctance fluctuations caused by structural deformation. Therefore, while improving mechanical pressure resistance, the above structure does not sacrifice the motor's electromagnetic performance. Instead, through structural integration and stabilization, it ensures the stability of the motor's magnetic field modulation process and efficient power output under high-voltage conditions.

[0038] In this embodiment, the motor is applied to the high-voltage magnetic pump. The above-mentioned structural improvement ensures the stable and efficient power output of the magnetic pump under high-voltage conditions, thus making it suitable for fields with high-voltage transmission requirements such as petrochemicals, nuclear power, and new energy.

[0039] For example, the specific structure and working principle of the vein structure 610 of Victoria amazonica leaves are common knowledge in the field and are well known to those skilled in the art. They are not the focus of this embodiment and will not be described in detail here.

[0040] In this embodiment, the moving submodule further includes multiple Hellbeck arrays. The moving submodule is rotatable about the axis of the main shaft 500. All the Hellbeck arrays are evenly spaced about the axis of the main shaft 500. The Hellbeck arrays pass through the rotor back iron 400 and extend along the working direction X. The Hellbeck array includes a first permanent magnet 420, two second permanent magnets 430, and two third permanent magnets 440. The first permanent magnet 420 is located between the two second permanent magnets 430. The first permanent magnet 420 and the two second permanent magnets 430 are about the axis of the shaft hole 410. The magnets are evenly spaced, with the magnetization direction of the first permanent magnet 420 being radially away from the pivot hole 410, and the magnetization direction of the second permanent magnet 430 being radially closer to the pivot hole 410. Each third permanent magnet 440 is disposed between the first permanent magnet 420 and a second permanent magnet 430. In the direction away from the pivot hole 410, the width direction of the third permanent magnet 440 gradually approaches the first permanent magnet 420, and the magnetization direction of the third permanent magnet 440 is along the thickness direction of the third permanent magnet 440 and approaches the first permanent magnet 420.

[0041] By precisely controlling the magnetization vector of each permanent magnet, efficient convergence and directional guidance of magnetic field lines are achieved. Compared to traditional radial or parallel magnetized surface-mount structures, this array significantly suppresses magnetic leakage on the back iron side of the magnetic circuit and concentrates most of the magnetic flux into the working air gap. This magnetic concentration effect is directly reflected in a significant increase in air gap magnetic flux density, enabling the motor to output higher torque under the same volume and current excitation, i.e., improving the motor's torque density. For applications requiring high-voltage transmission, this translates to a more powerful and compact power configuration. Simultaneously, the special layout of the third permanent magnet 440 and its tangential magnetization not only converge magnetic field lines but also help optimize the sinusoidal nature of the air gap magnetic field waveform. A magnetic field waveform closer to a sinusoidal distribution effectively reduces torque pulsation and cogging torque during motor operation, resulting in smoother power output, lower vibration and noise, and improved torque output quality. This is of great significance for precision fluid transport and applications with stringent requirements for operational stability.

[0042] Furthermore, the first permanent magnet 420, the second permanent magnet 430, and the third permanent magnet 440 are all rectangular parallelepipeds.

[0043] By constructing a complex Hellbeck array using cuboid permanent magnets, an excellent balance is achieved between realizing complex magnetic field modulation effects and reducing manufacturing process difficulty and controlling costs. Compared to specific arc-shaped or irregularly shaped permanent magnets, the processing, magnetization, and assembly processes of cuboids are more mature, simpler, and easier to ensure precision. This solution approximates the magnetic focusing effect of an arc-shaped array by tilting the third permanent magnet 440, thereby significantly reducing the manufacturing cost and assembly complexity of permanent magnets while ensuring improved torque density performance, thus improving the manufacturability and economy of the motor.

[0044] Furthermore, the first permanent magnet 420, the second permanent magnet 430, and the third permanent magnet 440 have rounded corners on their sides in the working direction X.

[0045] The primary benefit of rounding the edges of permanent magnets is structural mechanics optimization. In environments with high-speed rotor rotation and vibrations potentially caused by high-pressure fluid pulsation, sharp edges are high-risk areas for stress concentration, easily leading to microcracks or even breakage of the permanent magnet material. Rounding effectively disperses and alleviates mechanical stress in these areas, improving the overall structural reliability and fatigue resistance of the permanent magnet and rotor. Furthermore, the magnetic field distribution at sharp edges undergoes severe distortion, forming localized demagnetization concentration points. Under harsh conditions such as overload or high temperature, these areas are most prone to irreversible demagnetization. Rounding smooths the magnetic field gradient at the edges of the permanent magnet, reducing the peak intensity of localized demagnetization, thereby improving the permanent magnet's resistance to demagnetization, suppressing the risk of localized demagnetization, and ensuring the stability and durability of the motor's performance throughout its entire lifespan—achieving electromagnetic optimization.

[0046] In this embodiment, the inner connecting bridge 710 and the sidewalls of two adjacent magnetic conductors 720 form an assembly through slot, and the non-magnetic conductor 730 can be fitted into the assembly through slot.

[0047] The structure of the inner connecting bridge 710 and the assembly slot provides a precise and stable circumferential positioning reference for the magnetic material 720 and the non-magnetic material 730. The non-magnetic material 730 is embedded in the assembly slot, ensuring that the magnetic material 720 and the non-magnetic material 730 are evenly and precisely spaced along the circumference. This not only guarantees the symmetry and accuracy of the magnetic field modulation but also makes the entire adjusting ring 700 structure seamless, with a more compact radial dimension and high space utilization. Simultaneously, the magnetic material 720 is connected by the inner connecting bridge 710, and the non-magnetic material 730 is filled in between through an embedded design. These three elements mutually constrain each other, forming a mechanically mutually supportive and synergistically stressed overall ring structure. Compared to simple bonding or interference fit, this embedded structure significantly improves the overall rigidity and torsional deformation resistance of the adjusting ring 700, enabling it to better withstand the torque and vibration generated during motor operation.

[0048] For example, the end of the inner connecting bridge 710 is fixedly connected to a magnetic adjustment flange 740, the non-magnetic body 730 has a positioning hole 731 extending along the working direction X, and the magnetic adjustment ring 700 also includes a stud, which passes through the positioning hole 731 and is detachably connected to the magnetic adjustment flange 740.

[0049] The method of connecting the non-magnetic component 730 to the magnetic adjustment flange 740 via studs passing through the positioning holes 731 on the non-magnetic component 730 provides a reliable and detachable axial fastening solution. Compared to simple bonding or welding, this mechanical connection method offers higher connection strength and effectively prevents the non-magnetic component 730 from axially shifting or loosening under long-term vibration and thermal expansion and contraction, ensuring the long-term stability of the magnetic adjustment ring 700 structure and achieving a robust and maintainable connection. Furthermore, the aforementioned structural design incorporates the non-magnetic component 730 as a modular component with through holes, assembled via studs. This not only simplifies the manufacturing and assembly process and improves production efficiency but also allows for individual disassembly, inspection, or replacement of individual non-magnetic components 730 when problems arise, without scrapping the entire magnetic adjustment ring 700, significantly improving product maintainability and life-cycle economics.

[0050] In this embodiment, the magnetic conductor 720 is formed by stacking silicon steel sheets.

[0051] As a core component for magnetic field modulation, the 700 magnetic ring experiences drastic changes in its internal magnetic field. Using a solid magnetic material would induce strong eddy currents internally, causing severe heat generation and energy loss. By employing laminated silicon steel sheets and utilizing inter-sheet insulation layers, the eddy currents are confined to tiny paths within the cross-sections of each sheet. This significantly increases the resistance of the eddy current path, thereby suppressing eddy current losses to an extremely low level. This directly improves the motor's operating efficiency, reduces temperature rise, and makes the motor more suitable for long-term continuous operation in high-pressure, enclosed environments.

[0052] For example, the isolation sleeve 600 is made of epoxy resin.

[0053] Epoxy resin is a non-magnetic and non-conductive material. Using it in the isolation sleeve 600 between the inner rotor and stator means it does not shield or interfere with the working magnetic circuit, achieving zero-obstacle penetration of the magnetic field in the radial path. This is a fundamental prerequisite for ensuring the electromagnetic performance of the motor, enabling the integration of electromagnetic transparency and structural function. Moreover, compared to metallic materials, epoxy resin has superior chemical corrosion resistance and high specific strength. In petrochemical, nuclear power, and other fields, it can effectively resist the erosion of the transported media. Simultaneously, its lightweight and high-strength characteristics, combined with the aforementioned biomimetic structure, result in less additional strain generated under pressure. Furthermore, epoxy resin has a low coefficient of thermal expansion and good thermal insulation properties, helping to reduce dimensional instability caused by temperature changes, maintaining a good fit with the magnetic adjusting ring 700, and preserving the effectiveness of structural sealing and radial support.

[0054] In this embodiment, the housing also includes a motor end cover 100, a motor housing 200, and a plurality of first locking pins. The motor housing 200 is recessed with a mounting groove, the groove wall of which, together with the motor end cover 100, forms a mounting cavity. The main shaft 500 passes through the motor end cover 100, and the first locking pins pass through the motor end cover 100 and are detachably connected to the motor housing 200.

[0055] The motor end cover 100 and the motor housing 200 are connected by a first locking pin to form an installation cavity. This cavity provides a closed structure with high structural rigidity and a unified positioning reference for the internal mover and stator modules. This split assembly structure facilitates the installation and debugging of internal components and provides a stable and reliable overall frame. Moreover, the use of the first locking pin for fastening provides a controllable and uniform axial clamping force, ensuring precise alignment and tight fit between the motor end cover 100 and the motor housing 200. This is crucial for maintaining the relative positional accuracy of the components within the installation cavity and creates favorable conditions for achieving a reliable overall seal at the end cover mating surface, preventing external environmental corrosion of the internal precision components.

[0056] Furthermore, the end of the inner connecting bridge 710 is fixedly connected to the magnetic adjustment flange 740, and the housing also includes a second locking pin 910, which passes through the motor end cover 100 and is detachably connected to the magnetic adjustment flange 740.

[0057] The magnetic adjusting ring 700 is directly connected to the motor end cover 100 via the magnetic adjusting flange 740 at its end using the second locking pin 910. This provides robust axial and torsional positioning for the entire stator module, ensuring that the stator module does not rotate or axially displace relative to the housing during motor operation. This guarantees the stability of the magnetic field modulation relationship, which is crucial for ensuring motor output performance and operational safety. Furthermore, this connection method utilizes the motor end cover 100 as the final fixing reference, resulting in a short structural path and direct force transmission. During assembly, the internal assembly of the rotor and stator modules can be completed first, then the entire assembly can be placed into the motor housing 200, and finally secured externally using the second locking pin 910. This assembly process is efficient, facilitating modular production and final assembly of the entire machine.

[0058] In this embodiment, two bearings 920 are also provided in the mounting cavity. The main shaft 500 passes through the inner ring of the bearing 920, and the outer ring of the bearing 920 is tightly fitted with the inner wall of the tubular magnet.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electric motor, characterized in that, include: The housing has a mounting cavity; A moving submodule is arranged along the working direction (X) and is located in the mounting cavity. The moving submodule includes a main shaft (500) and a rotor back iron (400). The moving submodule is rotatable about the axis of the main shaft (500). The main shaft (500) extends out of the mounting cavity. The rotor back iron (400) has a through shaft hole (410) extending along the working direction (X). The main shaft (500) passes through the shaft hole (410). A stator module, located within the mounting cavity, comprises a tubular magnet, an isolation sleeve (600), a magnetic adjusting ring (700), and a motor stator (800) sequentially fitted from the inside out. The inner wall of the tubular magnet is in contact with the side wall of the rotor back iron (400). The tubular magnet includes several N-pole strip permanent magnets (310) and several S-pole strip permanent magnets (320) arranged circumferentially around the axis of the main shaft (500). One end of the isolation sleeve (600) is recessed with a receiving groove, and the outer wall of the tubular magnet is in contact with the side wall of the receiving groove. The other end of the sleeve (600) is coaxially provided with a Victoria amazonica leaf vein structure (610). The magnetic ring (700) includes an inner connecting bridge (710), a plurality of magnetic conductors (720) and a plurality of non-magnetic conductors (730). All the magnetic conductors (720) and all the non-magnetic conductors (730) are arranged circumferentially around the axis of the main shaft (500). Every two adjacent magnetic conductors (720) are connected at the end near the main shaft (500) through the inner connecting bridge (710). The inner connecting bridge (710) is in contact with the outer wall of the isolation sleeve (600).

2. The motor according to claim 1, characterized in that, The moving submodule also includes multiple Hellbeck arrays. The moving submodule is rotatable about the axis of the main shaft (500). All the Hellbeck arrays are evenly spaced about the axis of the main shaft (500). The Hellbeck arrays pass through the rotor back iron (400) and extend along the working direction (X). Each Hellbeck array includes a first permanent magnet (420), two second permanent magnets (430), and two third permanent magnets (440). The first permanent magnet (420) is located between the two second permanent magnets (430). The first permanent magnet (420) and the two second permanent magnets (430) are evenly spaced about the axis of the rotating shaft hole (410). The magnetization direction of a permanent magnet (420) is radially away from the pivot hole (410), and the magnetization direction of a second permanent magnet (430) is radially closer to the pivot hole (410). Each third permanent magnet (440) is disposed between the first permanent magnet (420) and a second permanent magnet (430). In the direction away from the pivot hole (410), the width direction of the third permanent magnet (440) gradually approaches the first permanent magnet (420), and the magnetization direction of the third permanent magnet (440) is close to the first permanent magnet (420) along the thickness direction of the third permanent magnet (440).

3. The motor according to claim 2, characterized in that, The first permanent magnet (420), the second permanent magnet (430) and the third permanent magnet (440) are all rectangular parallelepipeds.

4. The motor according to claim 3, characterized in that, The first permanent magnet (420), the second permanent magnet (430) and the third permanent magnet (440) have rounded edges on their sides in the working direction (X).

5. The motor according to claim 1, characterized in that, The inner connecting bridge (710) and the sidewalls of the two adjacent magnetic conductors (720) form an assembly channel, and the non-magnetic conductor (730) can be fitted into the assembly channel.

6. The motor according to claim 1, characterized in that, The end of the inner connecting bridge (710) is fixed with a magnetic adjustment flange (740), the non-magnetic body (730) has a positioning hole (731) extending along the working direction (X), and the magnetic adjustment ring (700) also includes a stud, which passes through the positioning hole (731) and is detachably connected to the magnetic adjustment flange (740).

7. The motor according to claim 1, characterized in that, The magnetic conductor (720) is formed by stacking silicon steel sheets.

8. The motor according to claim 1, characterized in that, The isolation sleeve (600) is made of epoxy resin.

9. The motor according to any one of claims 1-8, characterized in that, The housing also includes a motor end cover (100), a motor housing (200), and a plurality of first locking pins. The motor housing (200) has a recessed mounting groove. The groove wall of the mounting groove and the motor end cover (100) form the mounting cavity. The main shaft (500) passes through the motor end cover (100). The first locking pins pass through the motor end cover (100) and are detachably connected to the motor housing (200).

10. The motor according to claim 9, characterized in that, The end of the inner connecting bridge (710) is fixedly connected to the magnetic adjustment flange (740), and the housing also includes a second locking pin (910), which passes through the motor end cover (100) and is detachably connected to the magnetic adjustment flange (740).

Images