A magnetic isolation plate for a magnetic power generator set and a preparation method thereof

Abstract

A magnetic shielding plate for a magnetic power generator set and its preparation method belong to the field of magnetic shielding plate technology. To address the problems of existing magnetic shielding plates easily generating large eddy current losses, and the uneven force distribution caused by the horizontal plane layering of this novel magnetic shielding plate, this invention utilizes a multi-layer composite structure of a support layer, a magnetically conductive layer, and an antimagnetic layer. This not only increases the total permeability but also forms an effective impedance matching interface. The inclined surface, combined with nano-adhesive bonding, optimizes the force distribution and the bonding effect of the stacked plates. The absorbing film is made of nano-scale magnetic particles and lightweight organic polymer composites, ensuring absorption performance and significantly reducing the weight of the magnetic shielding plate to meet the lightweight requirements of electronic devices. Through the opening of magnetic flux holes, the magnetic shielding plate has a circular array of magnetic flux holes around its perimeter, with the hole area being waist-shaped and increasing from the inside out. The magnetic flux holes provide ventilation and heat dissipation while directionally guiding the magnetic field, reducing energy waste.

Description

Technical Field

[0001] This invention relates to the field of magnetic shielding plate technology, and in particular to a magnetic shielding plate for magnetic power generator sets and its preparation method. Background Technology

[0002] With the continuous development of modern technology, the requirements for magnetic field isolation in fields such as electronic equipment, motors, and transformers are becoming increasingly stringent. Magnetic shielding plates mainly use their high magnetic permeability to guide and concentrate magnetic field lines, reducing magnetic field leakage and thus achieving the effect of magnetic shielding. When a magnetic field encounters a high magnetic permeability material, the magnetic field lines tend to propagate along the interior of the material, thereby reducing electromagnetic interference to the surrounding environment. Traditional magnetic shielding materials and structures often have some limitations and cannot meet the increasingly complex and diverse application needs.

[0003] Existing magnetic shielding plates mostly use iron-based nanocrystalline alloys as magnetic shielding materials. These alloys have low resistivity and are prone to generating large eddy current losses in alternating magnetic fields, resulting in magnetic field line loss and material heating. In addition, the layers of this new magnetic shielding plate are set as horizontal planes, and the layers are only bonded together by coating nano-silica material. It is difficult to ensure that the layers are completely aligned when stacked, resulting in poor bonding effect. In actual pressing, this will cause uneven force on the inner and outer sides of the rotor, thereby increasing the noise of the motor and possibly causing the rotor laminations to warp.

[0004] To address the aforementioned problems, a magnetic shielding plate for magnetic power generator sets and its preparation method are proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a magnetic shielding plate for a magnetic power generator set and its preparation method. This invention solves the problems in the prior art where existing magnetic shielding plates mostly use iron-based nanocrystalline alloys as magnetic shielding materials. These alloys have low resistivity and are prone to generating large eddy current losses in alternating magnetic fields, resulting in magnetic line loss and material heating. In addition, the layers of this new magnetic shielding plate are set as horizontal planes, and the layers are only bonded by coating nano-silica material. This makes it difficult to ensure complete alignment between the layers during stacking, resulting in poor bonding. In actual pressing, this can lead to uneven force on the inner and outer sides of the rotor, thereby increasing the noise of the motor operation and potentially causing the rotor laminations to warp.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a magnetic shielding plate for a magnetic power generator set, comprising a support layer, a magnetic conductive layer superimposed on one side of the support layer, an antimagnetic layer superimposed on one side of the magnetic conductive layer, an insulating layer disposed on the outer side of the magnetic conductive layer and the antimagnetic layer, a nano-adhesive layer bonded between the support layer, the magnetic conductive layer and the antimagnetic layer, and a coating layer coated on the outside of the bonded support layer, the magnetic conductive layer and the antimagnetic layer, wherein the bonding surfaces of the support layer, the magnetic conductive layer and the antimagnetic layer are set as inclined surfaces.

[0007] Furthermore, the support layer includes a substrate, which is made of aluminum alloy.

[0008] Furthermore, an absorbing film is deposited on the outside of the substrate. The absorbing film is made of nanoscale magnetic particles and a lightweight organic polymer. The nanoscale magnetic particles are soft magnetic nanoparticles, and the lightweight organic polymer is polyimide resin.

[0009] Furthermore, the magnetic conductive layer is made of permalloy material with high saturation magnetic induction intensity.

[0010] Furthermore, the antimagnetic layer is made of stainless steel or copper, which is dip-coated with graphene and then hot-pressed and dried.

[0011] Furthermore, the insulating layer is made of composite ceramic material.

[0012] Furthermore, the magnetic shielding plate is designed to be circular overall.

[0013] Furthermore, a fixed shaft hole is provided in the middle of the magnetic shielding plate, the fixed shaft hole including a central shaft hole located at the center, and side shaft holes are provided in a circular array on the outer side of the central shaft hole.

[0014] Furthermore, the magnetic shielding plate has magnetic flux holes arranged in a circular array around its perimeter, and the area of ​​the magnetic flux holes is waist-shaped and increases from the inside out.

[0015] Another technical solution proposed by this invention: Provides a magnetic shielding plate for a magnetic power generator set and its preparation method, comprising the following steps:

[0016] S1: Raw material pretreatment: Cut and clean the materials used for the substrate and magnetic conductive layer to remove surface oil and oxide layer to avoid affecting subsequent molding and magnetic shielding effect. At the same time, prepare the insulating layer, nano adhesive layer and coating layer and set them aside.

[0017] S2: Stamping: Stainless steel and copper are coated with graphite and then hot-pressed and dried to form an antimagnetic layer. At the same time, the substrate, magnetic layer and antimagnetic layer are stamped to form inclined surfaces.

[0018] S3: Support layer deposition composite; The microwave absorbing film is uniformly deposited on the substrate through physical vapor deposition;

[0019] S4: Heat treatment: Eliminate internal stress generated during molding, optimize the magnetic permeability of the material, and improve the magnetic shielding performance. The magnetic layer needs to be heated to 800-1100℃ in a hydrogen protective atmosphere, held at the temperature for a period of time, and then slowly cooled. The substrate and antimagnetic layer need to be sintered in an air atmosphere at a temperature of about 1200-1400℃ to ensure the stability of the crystal structure.

[0020] S5: Insulation treatment: The magnetic and antimagnetic layers are dip-coated with the raw materials of the insulating layer and then dried at low temperature.

[0021] S6: Adhesive Hot Pressing; A nano-adhesive layer is used to bond the support layer, magnetic conductive layer and antimagnetic layer together, and hot pressing is used to form an integrated molding process;

[0022] S7: Coating: A thin and uniform metal coating layer is sprayed on the outside to protect the inner layers. The coating layer can be zinc-plated or nickel-plated to prevent rusting during use and to prevent it from affecting the magnetic shielding effect.

[0023] S8: Polishing treatment: For magnetic shielding plates with uneven surfaces, grinding and polishing are performed to ensure uniform thickness and avoid magnetic field leakage due to surface defects;

[0024] S9: Performance Testing: Use a permeability tester to test the permeability of the material to ensure that it meets the magnetic shielding requirements. Verify the actual magnetic shielding effect through a magnetic field shielding test.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. This invention provides a magnetic shielding plate for a magnetic power generator set and its preparation method. Through a multi-layered composite structure of a support layer, a magnetically conductive layer, and an antimagnetic layer, different materials are combined in multiple layers. This not only increases the total permeability but also forms an effective impedance matching interface, further weakening the penetration ability of electromagnetic waves and improving the magnetic shielding effect. The support layer mainly serves as structural support, while the magnetically conductive layer attracts and guides external magnetic fields, reducing magnetic field penetration into the protected area. The core requirements are high permeability and low coercivity. Using permalloy material with high saturation magnetic induction intensity can more effectively guide and concentrate magnetic field lines, enhancing the shielding effect. Simultaneously, it reduces the coercivity of the material, making it easier to magnetize or demagnetize, and enabling rapid response to changing magnetic field environments. This solves the problem that existing magnetic shielding plates often use iron-based nanocrystalline alloys as magnetic shielding materials, which have low resistivity and are prone to large eddy current losses in alternating magnetic fields, causing magnetic field line loss and material heating.

[0027] 2. The present invention provides a magnetic shielding plate for a magnetic power generator set and its preparation method. By setting the inclined surface at an angle and bonding it with a nano-adhesive layer, the stress distribution and lamination effect are optimized. The inclination angle of the inclined surface is usually between 3° and 10°. The coating layer is a thin and uniform metal coating, which can improve the surface condition of the material and enhance its corrosion resistance and mechanical strength. It does not directly participate in magnetic shielding, but its main function is to protect the internal layers. This solves the problem that existing magnetic shielding plates have horizontal planes between the layers, and each layer is only bonded by coating nano-silica material. This makes it difficult to ensure that the layers are completely aligned when stacked, resulting in poor bonding effect. In actual pressing, it can lead to uneven stress on the inner and outer sides of the rotor, thereby increasing the noise of the motor and possibly causing the rotor laminations to warp.

[0028] 3. The present invention provides a magnetic shielding plate for a magnetic power generator set and its preparation method. By setting an outer layer of the support layer with a microwave absorbing film, the microwave absorbing film is made of nanoscale magnetic particles and lightweight organic polymer composite. Through physical vapor deposition, the microwave absorbing film is uniformly deposited on the substrate, and the material thickness can be accurately controlled to reach the nanoscale or microscale, thereby realizing the ultra-thinness of the magnetic shielding plate and reducing its weight. By utilizing the small size effect of nanomaterials and the low density characteristics of lightweight polymers, the weight of the magnetic shielding plate can be significantly reduced while ensuring the microwave absorption performance, thus meeting the requirements of lightweight electronic equipment.

[0029] 4. This invention provides a magnetic shielding plate for a magnetic power generator set and its preparation method. The magnetic shielding plate has magnetic flux holes arranged in a circular array around its perimeter. The area of ​​these magnetic flux holes is waist-shaped and increases from the inside out. These holes provide ventilation and heat dissipation while directionally guiding the magnetic field, breaking down complete magnetic field blockage and enabling controllable penetration of the magnetic field in specific areas. Simultaneously, the structural integrity of the magnetic shielding plate is maintained. A fully enclosed magnetic shielding plate may cause the magnetic field to concentrate at the edges or in specific areas, resulting in localized eddy current losses or magnetic saturation. The magnetic flux holes can optimize the magnetic field distribution through current diversion, reducing energy waste. Furthermore, the waist-shaped arrangement of the magnetic flux holes is due to the rotor rotation and load fluctuations during the operation of the magnetic power generator set. The magnetic field direction may deviate slightly. The curved ends of the waist-shaped hole can accommodate this dynamic deviation, avoiding the situation where the magnetic field cannot penetrate the center of the hole due to changes in the magnetic field direction. At the same time, the middle rectangular section of the waist shape can still ensure the blocking effect on the ineffective magnetic field, balancing "dynamic adaptation" and "magnetic isolation accuracy". The magnetic flux holes on this magnetic isolation plate are distributed in a circular array, which can intermittently block the magnetic field when the magnetic isolation plate rotates to meet the needs. The magnetic flux holes are the key structure for the magnetic isolation plate to achieve precise magnetic isolation. Through shape design and layout optimization, it not only solves the problem that the effective magnetic field cannot be transmitted due to complete magnetic isolation, but also enhances the blocking effect on the ineffective magnetic field. It is the core design to balance the magnetic isolation requirements and energy conversion requirements of the magnetic generator set.

[0030] 5. The present invention provides a magnetic shielding plate for a magnetic power generator set and its preparation method. The magnetic shielding plate is prepared by separately applying nano-adhesive and a coating layer inside and outside the plate. The nano-adhesive is cured and bonded internally. The nano-adhesive is coated between the magnetic conductive layer, the antimagnetic layer, and the support layer. After hot pressing and curing, the interlayer bonds are tight, eliminating gaps. Simultaneously, the low magnetic permeability of the nano-adhesive helps to block interlayer magnetic leakage. The coating layer achieves edge sealing, covering the interlayer gaps. Since the interlayer edges of the magnetic shielding plate are prone to micro-gaps during processing, becoming channels for water vapor and salt penetration, a narrow coating layer is applied around the edges through localized coating. This coating layer completely seals the interlayer gaps, forming a three-dimensional protection with the internal nano-adhesive, preventing the internal metal layer from experiencing a decrease in magnetic permeability due to corrosion. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0033] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0034] Figure 4 This is a schematic diagram of the internal disassembly structure of the present invention;

[0035] Figure 5 This is a schematic diagram of the overall split structure of the present invention. Figure 1 ;

[0036] Figure 6 This is a schematic diagram of the overall split structure of the present invention. Figure 2 .

[0037] In the figure: 1. Support layer; 11. Substrate; 12. Absorbing film; 2. Magnetic layer; 3. Antimagnetic layer; 4. Insulating layer; 5. Nano-adhesive layer; 6. Coating layer; 7. Fixing shaft hole; 71. Central shaft hole; 72. Side shaft hole; 8. Magnetic flux hole; 9. Inclined surface. Detailed Implementation

[0038] 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.

[0039] In order to solve existing technical problems, such as Figures 1-6 As shown, the following preferred technical solutions are provided:

[0040] A magnetic shielding plate for a magnetic power generator set includes a support layer 1, a magnetically conductive layer 2 superimposed on one side of the support layer 1, an antimagnetic layer 3 superimposed on one side of the magnetically conductive layer 2, an insulating layer 4 disposed on the outer side of the magnetically conductive layer 2 and the antimagnetic layer 3, a nano-adhesive layer 5 bonded between the support layer 1, the magnetically conductive layer 2 and the antimagnetic layer 3, and a coating layer 6 coated on the outside of the bonded support layer 1, the magnetically conductive layer 2 and the antimagnetic layer 3, and the bonding surface of the support layer 1, the magnetically conductive layer 2 and the antimagnetic layer 3 is set as an inclined surface 9.

[0041] Specifically, this magnetic shielding plate adopts a multi-layer composite structure consisting of a support layer 1, a magnetically conductive layer 2, and an antimagnetic layer 3. Combining different materials in multiple layers not only increases the total permeability but also forms an effective impedance matching interface, further weakening the penetration ability of electromagnetic waves and improving the magnetic shielding effect. The support layer 1 mainly serves as structural support, while the magnetically conductive layer 2 attracts and diverts external magnetic fields, reducing magnetic field penetration into the protected area. The core requirements are high permeability and low coercivity. Permalloy material with high saturation magnetic induction intensity is used, which can more effectively guide and concentrate magnetic field lines, enhancing the shielding effect. Simultaneously, it reduces the coercivity of the material, making it easier to magnetize or demagnetize, and enabling rapid response to changing magnetic field environments. The magnetically conductive layer 2 uses permalloy material with high saturation magnetic induction intensity. Permalloy material has a permeability far exceeding that of silicon steel sheets under weak magnetic fields, making it suitable for precision instruments. The antimagnetic layer 3 is made of stainless steel and copper, coated with graphene and then hot-pressed and dried. The antimagnetic layer 3 blocks magnetic field penetration through its own low magnetic permeability, which is equivalent to a magnetic field barrier. It is often used in strong magnetic field or high-frequency magnetic field scenarios. The inclined surface 9 is set at an angle, which, together with the adhesion of the nano adhesive layer 5, optimizes the stress distribution and the bonding effect of the stacked sheets. The inclination angle of the inclined surface 9 is usually between 3° and 10°. The coating layer 6 is a thin and uniform metal coating that can improve the surface condition of the material and improve its corrosion resistance and mechanical strength. It does not directly participate in the magnetic shielding. Its main function is to protect the internal layers. The nano adhesive layer 5 is the core functional layer in the magnetic shielding plate to achieve stable bonding and performance synergy of the multi-layer structure. Its function is not limited to "adhesion". It also improves the overall magnetic shielding efficiency, mechanical stability and environmental adaptability of the magnetic shielding plate through nanoscale material properties and interface control.

[0042] Tiny gaps between the layers of the magnetic shielding plate can become weak points for magnetic field leakage. The molecular chain diameter of nano-adhesive layer 5 is only 10-50 nm, allowing it to penetrate into the micropores of each layer of the magnetic shielding plate, forming a mechanical anchoring effect. Compared to traditional adhesives, its contact area increases by 30%-50%, and the interlayer peel strength is increased to ≥8 MPa. This allows it to withstand the vibration and thermal shock during the operation of the magnetic generator set, preventing magnetic field leakage caused by interlayer separation. Furthermore, through the introduction of amino groups into its molecular design, nano-adhesive layer 5 can form chemical bonds with both polar and non-polar materials, solving the compatibility problem of traditional adhesives being "stronger on metals but weaker on polymers." This ensures uniform bonding strength across all layers. The nano-adhesive itself uses a low magnetic permeability formula, which forms a continuous low magnetic permeability interface with the antimagnetic layer 3 after curing. When a magnetic field attempts to pass through the interlayer gap, it will be repelled by the low magnetic permeability of the nano-adhesive, thus enhancing the magnetic shielding effect in synergy with the antimagnetic layer 3 and reducing the interlayer leakage magnetic rate by 40%-60%. In high-temperature and humid environments with unit operating temperatures of 80-120℃, the three-dimensional cross-linked network of the nano-adhesive layer 5 forms physical cross-linking points through nanofillers, which can maintain structural stability, prevent softening and sagging. At the same time, its dense molecular structure can block water vapor and salt from penetrating into the magnetic conductive layer 2 and the antimagnetic layer 3, forming a double anti-corrosion barrier with the coating layer 6, thereby improving the salt spray resistance of the magnetic shielding plate from 500 hours to more than 1000 hours.

[0043] Permalloy contains approximately 80% nickel and 20% iron. The preparation process requires mixing and batching the raw materials before smelting in a furnace. After smelting, the molten alloy is poured into a mold for casting to form an alloy billet. The alloy billet then undergoes heat treatment and refining to eliminate impurities and non-metallic inclusions, thereby improving the purity and performance of the alloy.

[0044] The support layer 1 includes a substrate 11, which is made of aluminum alloy, is lightweight, high-strength, and corrosion-resistant. The substrate 11 is located at the bottom, which facilitates the corresponding adhesion of the magnetic conductive layer 2 and the antimagnetic layer 3. An absorbing film 12 is deposited on the outside of the substrate 11. The absorbing film 12 is uniformly deposited on the substrate 11 through physical vapor deposition, which can accurately control the material thickness to achieve the nanometer or micrometer level, thereby realizing the ultra-thinness of the magnetic shielding plate and reducing its weight. The absorbing film 12 is made of nanoscale magnetic particles and lightweight organic polymer composite. By utilizing the small size effect of nanomaterials and the low density characteristics of lightweight polymers, the weight of the magnetic shielding plate can be significantly reduced while ensuring the absorbing performance, thus meeting the requirements of lightweight electronic equipment.

[0045] The preparation of the microwave absorbing film 12 needs to consider three core objectives: "uniform dispersion of magnetic particles," "targeted microwave absorption performance," and "mechanical stability of the film." For nanoscale magnetic particles, soft magnetic nanoparticles with an average particle size of 50-150 nm are selected, such as Fe3O4, Ni-Zn ferrite, and nano-Fe-Si alloy. Among them, Fe3O4 particles have high saturation magnetization (approximately 80 emu / g) and strong magnetic loss capacity in the low-frequency magnetic field of a magnetic generator (50Hz-10kHz), making them a preferred core absorbing phase. The surface modification of the nanomagnetic particles uses titanate coupling agents to reduce particle agglomeration. For the lightweight organic polymer, polyimide resin is selected. Its high temperature resistance and high mechanical strength make it suitable as the matrix, with a density ≤1.4 g / cm³ to meet the lightweight requirement. The mass ratio of modified soft magnetic nanoparticles to polyimide resin is 1:4. Excessive particle proportion can easily lead to agglomeration. If the temperature is too low, the microwave absorption performance will be insufficient. The particles are slowly added to the polymer solution, and a preliminary dispersion slurry is formed by mechanical stirring to avoid the destruction of the particle structure caused by direct high-speed stirring. The preliminary slurry is then transferred to a high-shear emulsifier to break up the micron-sized agglomerates through mechanical shearing force. Cooling water is introduced during the shearing process to keep the slurry temperature ≤40℃ to prevent solvent evaporation or premature resin curing. The sheared slurry is then transferred to an ultrasonic cell disruptor to further disperse the nano-sized agglomerates using high-frequency vibration. The dispersion uniformity is ensured by detection using a dynamic light scattering instrument. Finally, 1% of the total mass of plasticizer dioctyl phthalate and 0.5% of antioxidant are added to the slurry to improve aging resistance. The mixture is stirred at low speed until uniform, and then transferred to a vacuum defoaming tank and treated at a vacuum degree of 0.095MPa for 20 minutes to remove air bubbles introduced by stirring and avoid pinhole defects after molding.

[0046] The slurry needs to be pre-cured at low temperature after being cast into a film: the wet film after orientation treatment is placed in an oven and kept at 60°C for 2 hours to slowly evaporate the solvent and allow the film to initially set. Then it is fully cured at high temperature: the temperature is raised to 120°C and kept for 3 hours to allow the resin to fully cross-link and form a three-dimensional network structure, which firmly locks the magnetic particles. After curing, it is allowed to cool naturally to room temperature in the oven to avoid warping caused by excessive temperature difference.

[0047] The insulating layer 4 is made of composite ceramic material. The prepared magnetic conductive layer 2 and antimagnetic layer 3 are dip-coated and then dried at low temperature to form the insulating layer 4.

[0048] The magnetic shielding plate is circular in shape. The thickness of the support layer 1 is 1mm-3mm, the thickness of the magnetic conductive layer 2 is 3mm-5mm, and the thickness of the antimagnetic layer 3 is 3mm-5mm. The overall thickness of the magnetic shielding plate is about 7-13mm. This design effectively blocks axial magnetic leakage without excessively increasing the overall weight of the rotor, thus affecting the rotor's start-up and stopping time. The circular shape allows for better installation on the shaft and synchronous movement with it. The thinner support layer 1 mainly serves a supporting function, while the thicker magnetic conductive layer 2 and antimagnetic layer 3 ensure the magnetic shielding effect. The entire magnetic shielding plate is manufactured using a hot-press molding process to ensure the shape accuracy and flatness of the magnetic shielding plate, avoiding local magnetic field leakage due to deformation, which would affect the magnetic shielding performance.

[0049] The magnetic shielding plate has a fixed shaft hole 7 in the middle. The fixed shaft hole 7 includes a central shaft hole 71 located in the center. Side shaft holes 72 are arranged in a circular array on the outer side of the central shaft hole 71. The central shaft hole 71 is sleeved on the rotating shaft to ensure that the magnetic shielding plate and the rotating shaft are collinear. The side shaft holes 72 have a built-in positioning rotating shaft to ensure that the connection between the magnetic shielding plate and the rotating shaft is firm and that no relative rotation will occur during the operation of the motor.

[0050] The magnetic shielding plate has magnetic flux holes 8 arranged in a circular array around its perimeter. The area of ​​each magnetic flux hole 8 is waist-shaped and increases from the inside out. These holes provide ventilation while simultaneously guiding the magnetic field in a specific direction, breaking down complete magnetic field blockage and enabling controllable penetration of the magnetic field in a specific area. This also ensures the structural integrity of the magnetic shielding plate. A fully enclosed magnetic shielding plate might cause the magnetic field to concentrate at the edges or in specific areas, resulting in localized eddy current losses or magnetic saturation. The magnetic flux holes 8 can optimize the magnetic field distribution through current diversion, reducing energy waste. The core function of the magnetic flux holes 8 is to block ineffective magnetic fields while providing a precise channel for effective magnetic fields in specific directions, such as the magnetic field required for energy conversion within the unit, preventing excessive magnetic field attenuation from affecting the normal operation of the unit. The waist-shaped arrangement of the magnetic flux holes 8 is due to the fact that during the operation of the magnetic generator unit, the magnetic field is... Due to rotor rotation and load fluctuations, the magnetic field direction may experience slight shifts. The curved ends of the waist-shaped hole can accommodate this dynamic shift, preventing the magnetic field from failing to penetrate the center of the hole due to changes in the magnetic field direction. At the same time, the rectangular section in the middle of the waist shape can still ensure the blocking effect against ineffective magnetic fields, balancing "dynamic adaptation" and "magnetic isolation precision". The magnetic flux holes 8 on this magnetic isolation plate are arranged in a circular array, which can intermittently block the magnetic field when the magnetic isolation plate rotates to meet the needs. The magnetic flux holes 8 are the key structure for the magnetic isolation plate to achieve precise magnetic isolation. Through shape design and layout optimization, it not only solves the problem of "complete magnetic isolation causing the effective magnetic field to be unable to be transmitted", but also strengthens the blocking effect against ineffective magnetic fields. It is the core design that balances the "magnetic isolation requirements" and "energy conversion requirements" of the magnetic generator set.

[0051] To further explain the above embodiments, the present invention also provides an implementation method: a method for preparing a magnetic shielding plate for a magnetic power generator set, comprising the following steps:

[0052] Step 1: Raw material pretreatment: Cut and clean the materials used for the substrate 11 and magnetic conductive layer 2 to remove surface oil and oxide layer to avoid affecting subsequent molding and magnetic shielding effect. At the same time, prepare the insulating layer 4, nano adhesive layer 5 and coating layer 6 and set them aside.

[0053] Step 2: Stamping: Stainless steel and copper are coated with graphene and then hot-pressed and dried to form antimagnetic layer 3. At the same time, the substrate 11, magnetic layer 2 and antimagnetic layer 3 are stamped to form inclined surfaces 9. The antimagnetic layer 3 utilizes the low magnetic permeability of graphene to enhance the antimagnetic effect. The hot pressing process can improve the material density and reduce magnetic leakage channels. The angle accuracy and surface flatness of the inclined surface 9 need to be checked to prevent poor adhesion of the inclined surface 9 from causing interlayer gaps.

[0054] Step 3: Deposition and composite of support layer 1; The microwave absorbing film 12 is uniformly deposited on the substrate 11 by physical vapor deposition. Physical vapor deposition is in the form of evaporation deposition. In a vacuum environment, the microwave absorbing film 12 is evaporated and deposited on the surface of the substrate 11 to form support layer 1.

[0055] Step 4: Heat Treatment: Eliminate internal stress generated during molding, optimize the magnetic permeability of the material, and improve magnetic shielding performance. The magnetic layer 2 needs to be heated to 800-1100℃ in a hydrogen protective atmosphere, held for 2-4 hours, and then slowly cooled. The substrate 11 and the antimagnetic layer 3 need to be sintered in an air atmosphere at a temperature of about 1200-1400℃, held for 3-5 hours, and the slow cooling rate is controlled at 5-10℃ / min to avoid material cracking due to insufficient holding or excessive cooling, and to ensure the stability of the crystal structure. The heat treatment process is designed with different atmospheres and temperatures for different materials: the magnetic layer 2 is protected by hydrogen to prevent oxidation, and the substrate 11 is sintered in air to stabilize the structure. This not only optimizes the magnetic properties of the magnetic layer 2, but also avoids material damage caused by a single process. For example, high-temperature oxidation of the magnetic layer 2 will reduce the magnetic permeability. This step requires the use of a portable tester to randomly check the magnetic permeability of the magnetic layer 2 to avoid batch magnetic performance failure due to deviations in heat treatment parameters.

[0056] Step 5: Insulation treatment: The magnetic conductive layer 2 and the antimagnetic layer 3 are dip-coated with the raw material of the insulating layer 4, and then dried at low temperature. The insulation treatment also prevents interlayer leakage.

[0057] Step Six: Adhesive Hot Pressing; The support layer 1, magnetic conductive layer 2, and antimagnetic layer 3 are bonded together using nano-adhesive layer 5 and integrally formed by hot pressing. The hot pressing temperature is 80-120℃, matching the curing temperature of nano-adhesive layer 5, the pressure is 0.5-1MPa, and the holding pressure is 10-20 minutes to ensure that the multi-layer structure is tightly bonded and free of air bubbles. Nano-adhesive layer 5 ensures tight bonding of multiple layers and reduces magnetic leakage between gaps. The interlayer bonding strength is tested through a peel test to prevent the bonding failure of nano-adhesive layer 5.

[0058] Step 7: Coating: Spray a thin and uniform metal coating layer 6 on the outside of the magnetic shielding plate to protect the internal layers. The coating layer 6 can be zinc-plated or nickel-plated to prevent rusting during use and affecting the magnetic shielding effect. The thickness of the coating layer 6 should be controlled between 5-10μm to avoid insufficient thickness leading to corrosion failure or excessive thickness affecting the overall size of the magnetic shielding plate. If there is any omission in the coating layer 6, the existing coating can be removed by acid pickling and re-spraying to reduce material waste.

[0059] Step 8: Polishing: For magnetic shielding plates with uneven surfaces, grind and polish them to ensure uniform thickness and avoid magnetic field leakage due to surface defects. If the magnetic shielding plate is too thin after polishing, a thin magnetic conductive layer 2 can be re-bonded before polishing.

[0060] Step Nine: Performance Testing: Use a permeability tester to test the permeability of the material to ensure it meets the magnetic shielding requirements. Verify the actual magnetic shielding effect through a magnetic field shielding test. This step ensures magnetic shielding performance and durability throughout the entire process, from "insulation treatment to prevent interlayer leakage" and "nano-adhesive layer 5 to ensure tight adhesion of multiple layers," to coating layer 6 for corrosion protection and polishing to ensure uniform thickness. Each step is designed to improve the magnetic shielding effect and extend the service life, forming a complete performance assurance chain. The final "permeability test and magnetic field shielding test" can directly verify whether the finished product meets the standards, preventing unqualified products from flowing downstream.

[0061] Magnetic generator sets contain multiple magnetic fields, including the permanent magnet rotor magnetic field, stator armature magnetic field, and auxiliary component leakage magnetic field. Magnetic shielding plates physically block magnetic field crosstalk paths, preventing interference between different components. Furthermore, magnetic field leakage and eddy current losses are major sources of energy loss in magnetic generator sets. Magnetic shielding plates optimize magnetic field paths, reducing ineffective energy consumption. The magnetically conductive layer 2 uses permalloy with high saturation magnetic induction intensity. Permalloy is a paramagnetic material with minimal impact on the magnetic field. The antimagnetic layer 3 is made of stainless steel, copper, and graphene, which are impregnated and then hot-pressed and dried. Stainless steel, copper, and graphene are antimagnetic materials that repel magnetic fields, making it more difficult for them to penetrate the material. Inside the material, the low magnetic permeability of the antimagnetic material makes the antimagnetic layer 3 a magnetic field barrier. When an external magnetic field attempts to pass through the antimagnetic layer 3, an induced magnetic moment opposite to the direction of the external magnetic field is generated inside the material, forming a reverse magnetic field that cancels out part of the external magnetic field. This causes the magnetic field strength that eventually penetrates the antimagnetic layer 3 to decrease significantly. Unlike permanent magnet materials, antimagnetic materials do not retain residual magnetism, nor do they retain magnetism after the magnetic field disappears, like soft magnetic materials. Their repulsive effect on the magnetic field only occurs when the external magnetic field is present, and the properties are immediately restored after the magnetic field disappears. This characteristic ensures that the antimagnetic layer 3 will not fail due to long-term exposure to a magnetic field environment, making it particularly suitable for dynamically changing magnetic field scenarios in magnetic generator sets.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A magnetic dynamic power generator set with a magnetic isolation plate, comprising a support layer (1), characterized in that: A magnetically conductive layer (2) is superimposed on one side of the support layer (1), and an antimagnetic layer (3) is superimposed on one side of the magnetically conductive layer (2). An insulating layer (4) is provided on the outside of the magnetically conductive layer (2) and the antimagnetic layer (3). A nano-adhesive layer (5) is bonded between the support layer (1), the magnetically conductive layer (2) and the antimagnetic layer (3). A coating layer (6) is applied to the outside of the bonded support layer (1), the magnetically conductive layer (2) and the antimagnetic layer (3). The bonding surfaces of the support layer (1), the magnetic conductive layer (2) and the antimagnetic layer (3) are set as inclined surfaces (9).

2. The magnetic isolation plate for a magnetic power generator set according to claim 1, characterized in that: The support layer (1) includes a substrate (11), which is made of aluminum alloy.

3. The magnetic shielding plate for a magnetic power generator set as described in claim 2, characterized in that: The substrate (11) has a microwave absorbing film (12) deposited on its exterior. The microwave absorbing film (12) is made of nanoscale magnetic particles and lightweight organic polymer. The nanoscale magnetic particles are soft magnetic nanoparticles, and the lightweight organic polymer is polyimide resin.

4. The magnetic shielding plate for a magnetic power generator set as described in claim 3, characterized in that: The magnetic conductive layer (2) is made of permalloy material with high saturation magnetic induction intensity.

5. The magnetic shielding plate for a magnetic power generator set as described in claim 4, characterized in that: The antimagnetic layer (3) is made of stainless steel and copper, which are coated with graphene and then hot-pressed and dried.

6. The magnetic shielding plate for a magnetic power generator set as described in claim 5, characterized in that: The insulating layer (4) is made of composite ceramic material.

7. The magnetic shielding plate for a magnetic power generator set as described in claim 6, characterized in that: The magnetic shielding plate is circular in shape.

8. The magnetic shielding plate for a magnetic power generator set as described in claim 7, characterized in that: The magnetic shielding plate has a fixed shaft hole (7) in the middle, the fixed shaft hole (7) includes a central shaft hole (71) located in the center, and side shaft holes (72) are arranged in a circular array on the outer side of the central shaft hole (71).

9. The magnetic shielding plate for a magnetic power generator set as described in claim 8, characterized in that: The magnetic shielding plate has magnetic flux holes (8) arranged in a circular array around its perimeter. The area of ​​each magnetic flux hole (8) is waist-shaped and increases from the inside out.

10. A method for preparing a magnetic shielding plate for a magnetic power generator set as described in claim 9, characterized in that, Includes the following steps: S1: Raw material pretreatment; S2: Stamping; S3: Support layer (1) deposition composite; by physical vapor deposition, the microwave absorbing film (12) is uniformly deposited on the substrate (11); S4: Heat treatment; S5: Insulation treatment; S6: Adhesive hot pressing; The support layer (1), magnetic conductive layer (2) and antimagnetic layer (3) are bonded together using a nano adhesive layer (5) and integrally formed by hot pressing; S7: Coating: A thin and uniform metal coating layer (6) is sprayed on the outside to protect the inner layers; S8: Polishing treatment; S9: Performance testing.

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