Nanometer insulation bearing high-voltage permanent magnet motor

Abstract

The invention provides a nanometer insulation bearing high-voltage permanent magnet motor, and relates to the technical field of permanent magnet motors, and the nanometer insulation bearing high-voltage permanent magnet motor comprises a motor housing, a rolling bearing, an oil injection mechanism, an elastic member, and a passive abutting mechanism. Wherein a stator is rotatably arranged in the motor shell, and one end of the stator is coaxially provided with a rotating shaft which partially extends out of the motor shell. And the rolling bearing is embedded in the bearing chamber and is sleeved with a nano insulating bearing sleeve. The oil injection mechanism comprises a nozzle, a runner pipe, a first oil pump and an oil storage tank, and the elastic piece is installed between the nozzle and the guide part and enables the nozzle to have the trend of moving into the guide part. The spray head is provided with a first spraying cavity channel and a second spraying cavity channel which are both communicated with the runner pipe, a spraying opening of the first spraying cavity channel faces the gap between the ball and the inner ring shaft, and a spraying opening of the second spraying cavity channel faces the passive abutting mechanism. The problem that damage is prone to occurring between the rotor and the rolling bearing can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motors, and in particular to a nano-insulated bearing high-voltage permanent magnet motor. Background Art

[0002] High-voltage permanent magnet motors are electric motors powered by high-voltage power supplies and are widely used in the industrial and energy fields. The main feature of this motor is that it uses permanent magnets to generate magnetic fields, thereby achieving efficient conversion of electrical energy into mechanical energy. Compared with traditional motors, high-voltage permanent magnet motors have higher power density and energy efficiency, and can usually output greater power with smaller size and weight.

[0003] The structure of a high-voltage permanent magnet motor generally includes a stator, a rotor, a rolling bearing, and a rotating shaft. The stator consists of windings that generate a rotating magnetic field when energized; the rotor contains permanent magnets and relies on the action of the stator magnetic field to achieve rotation. This type of motor can operate at higher speeds and load conditions and is suitable for applications that require high efficiency and high reliability, such as power systems, rail transportation, and large-scale mechanical equipment. The rotating shaft is coaxially connected to the rotor and passes through the motor housing through rolling bearings.

[0004] Through long-term practice, the applicant has found that after a high-voltage permanent magnet motor has been used for a long time, damage is likely to occur between the rotor and the rolling bearing of the motor. Summary of the invention

[0005] In order to solve the problem of easy damage between the rotor and the rolling bearing, the present application provides a nano-insulated bearing high-voltage permanent magnet motor.

[0006] The present application provides a nano-insulated bearing high-voltage permanent magnet motor, which adopts the following technical solution: A nano-insulated bearing high-voltage permanent magnet motor, comprising: a motor housing, a stator rotatably arranged inside the motor housing, and a rotating shaft partially extending to the outside of the motor housing is coaxially arranged at one end of the stator; a rolling bearing, comprising an inner ring shaft, an outer ring shaft and balls, the outer ring shaft is coaxially arranged on the periphery of the inner ring shaft, a plurality of balls are rotatably arranged between the inner ring shaft and the outer ring shaft, a bearing chamber is arranged on the side wall of the motor housing, the outer ring shaft is embedded in the bearing chamber, and the outer ring shaft sleeve is provided with a nano-insulated bearing sleeve, the rotating shaft passes through the inner ring shaft and is interference fit with the inner ring of the inner ring shaft; an oil injection mechanism, comprising a nozzle, A circulation pipe, a first oil pump and an oil storage tank, an oil supply cavity is axially arranged in the rotating shaft, the circulation pipe is arranged in the oil supply cavity, the oil storage tank is arranged on one side of the motor housing, the first oil pump is installed on the oil storage tank and the pump inlet end of the first oil pump is connected with the interior of the oil storage tank, one end of the circulation pipe is rotatably connected with the pump outlet end of the first oil pump, and the other end extends into the oil supply cavity, the rotating shaft is provided with a guide part, the guide part has a guide inner cavity connected with the oil supply cavity, the guide part is perpendicular to the rotating shaft and at least two groups are arranged in the circumferential direction of the rotating shaft, and the nozzle is movably installed The guide part is in communication with the other end of the flow pipe; an elastic member is installed between the nozzle and the guide part, and the elastic member makes the nozzle have a tendency to move into the guide part. When the first oil pump is started and the rotating shaft rotates, the nozzle is partially pushed out of the guide part under the dual effects of the impact force of the cooling oil entering the nozzle and the centrifugal force when the rotating shaft rotates. When the first oil pump is turned off and the rotating shaft stops rotating, the nozzle retreats into the guide part under the elastic force of the elastic member; a passive abutment mechanism, an end cover is provided in the motor housing and near the rolling bearing, and the rotating shaft passes through The end cover is rotatably matched with the end cover, the guide part is located in the end cover, the nozzle has a first injection cavity and a second injection cavity, the first injection cavity and the second injection cavity are both connected with the flow pipe, the injection port of the first injection cavity is toward the gap between the ball and the inner ring shaft after the nozzle moves out of the guide part, the injection port of the second injection cavity is toward the passive abutment mechanism after the nozzle moves out of the guide part, the passive abutment mechanism applies a thrust toward the outer ring shaft to the nano-insulating bearing sleeve under the action of the cooling oil sprayed from the second injection cavity, so that the nano-insulating bearing sleeve is tightly pressed against the outer ring shaft.

[0007] Preferably, the nozzle also has a drainage channel, the drainage channel has a first end and a second end, the first end of the drainage channel is connected to the first injection channel and the second injection channel at the same time, the second end is connected to the circulation pipe, and the inner diameter of the drainage channel gradually decreases from the first end to the second end; the injection port of the first injection channel and the injection port of the second injection channel are respectively facing opposite directions, the first injection channel and the second injection channel are both arc-shaped and bent to opposite sides, wherein the inner diameter of the first injection channel gradually increases from one end close to the drainage channel to the injection port of the first injection channel, and the inner diameter of the second injection channel gradually decreases from one end close to the drainage channel to the injection port of the second injection channel.

[0008] Preferably, the connecting point between the first injection cavity and the drainage cavity is configured as a first connecting portion, and the connecting point between the second injection cavity and the drainage cavity is configured as a second connecting portion, and the first connecting portion and the second connecting portion are both located within the projection of the cross section of the drainage cavity, wherein the inner diameter of the first connecting portion is greater than the inner diameter of the second connecting portion.

[0009] Preferably, the elastic member includes a compression spring, the portion of the circulation pipe connected to the nozzle is a telescopic pipe section, and the compression spring is sleeved on the outside of the telescopic pipe section; the inner wall of the guide cavity is provided with a step surface, one end of the compression spring is connected to the step surface, and the other end is connected to the end of the nozzle.

[0010] Preferably, the passive abutment mechanism includes a pressure-bearing component, a rotating component and an abutment component, the rotating component can be movably arranged on the inner wall of the end cover, and the pressure-bearing component and the abutment component are respectively arranged at both ends of the rotating component, wherein, when the nozzle is partially pushed out of the guide part under the dual effects of the impact force of the cooling oil entering the nozzle and the centrifugal force when the rotating shaft rotates, the cooling oil sprayed from the injection port of the second injection cavity will be directly sprayed onto the pressure-bearing component and exert an impact force on the pressure-bearing component, and drive the rotating component to rotate and drive the abutment component to abut against the nano-insulating bearing sleeve, so that the nano-insulating bearing sleeve is tightly pressed against the outer ring shaft after being subjected to force.

[0011] Preferably, the pressure-bearing component comprises a first annular plate and a first spring, the first annular plate is connected to the inner side wall of the end cover through the first spring, and along the axial direction of the rotating shaft, the annular plate surface of the first annular plate is always directly opposite to the injection port of the second injection cavity moved out of the guide portion; the abutting component comprises a second annular plate and a second spring, the second annular plate is connected to the inner side wall of the end cover through the second spring, and along the axial direction of the rotating shaft, the annular plate surface of the second annular plate is always in contact with the side surface of the nano-insulated bearing sleeve; the rotating component The component includes an L-shaped rod, a first abutment ball and a second abutment ball. The bending part of the L-shaped rod is rotatably connected to the inner wall of the end cover. The first abutment ball is arranged at one end of the L-shaped rod and is used for slidingly abutting with the plate surface of the first annular plate away from the nozzle. The second abutment ball is arranged at the other end of the L-shaped rod and is used for slidingly abutting with the plate surface of the second annular plate away from the nano-insulating bearing sleeve. After the first annular plate is impacted by cooling oil, the first abutment ball is pushed to drive the L-shaped rod to rotate after being subjected to force, so that the second abutment ball pushes the second annular plate to abut against the side of the nano-insulating bearing sleeve.

[0012] Preferably, telescopic rods are provided in the inner circles of the first spring and the second spring, the telescopic directions of the two telescopic rods are parallel to the axial direction of the rotating shaft, and one end of the telescopic rod is connected to the inner wall of the end cover, and the other end is connected to the first annular plate and the second annular plate.

[0013] Preferably, an outflow pipe is provided at the lowest end of the end cover, a recovery tank is provided on one side of the motor housing, and an end of the outflow pipe away from the end cover opens toward an upper end of the recovery tank.

[0014] Preferably, a filter residue mesh plate is provided in the recovery tank, and the filter residue mesh plate divides the recovery tank into an upper storage chamber and a lower storage chamber. The metal powder in the cooling oil stays in the upper storage chamber under the blocking effect of the filter residue mesh plate; a reflux pipe is connected between the oil storage tank and the lower storage chamber, and a second oil pump is provided on the reflux pipe, and the second oil pump is used to pump the cooling oil in the lower storage chamber into the oil storage tank.

[0015] Preferably, a circular oil baffle is coaxially provided on the portion of the rotating shaft located outside the motor housing, the outer diameter of the circular oil baffle is larger than the outer diameter of the rolling bearing, and the gap between the circular oil baffle and the motor housing is located directly above the upper end opening of the recovery tank.

[0016] The present invention has the following advantages and beneficial effects: The selection of rolling bearings and their combination with nano-insulated bearing sleeves significantly improves the insulation performance of the motor. The outer ring shaft is embedded in the bearing chamber of the motor housing and is covered with a nano-insulated bearing sleeve, which effectively isolates the current and reduces the discharge caused by the current passing through the bearing. This configuration not only reduces the risk of damage to the internal components of the motor by the current, but also improves the overall efficiency of the motor by reducing friction losses. At the same time, the nano-insulating material has excellent high temperature resistance, which further ensures the stability of the motor in high temperature environments.

[0017] The design of the oil injection mechanism provides the necessary cooling solution for the motor. The oil injection mechanism includes a nozzle, a flow pipe, a first oil pump and an oil storage tank. The oil supply cavity is set to guide the cooling oil from the oil storage tank to the bearing. During the operation of the motor, the first oil pump delivers the cooling oil to the nozzle to ensure that the cooling oil can effectively cover the bearing and take away excess heat. This mechanism significantly reduces the bearing temperature, thereby avoiding the degradation of material performance and wear caused by high temperature, and enhancing the reliability of the bearing.

[0018] The nozzle is combined with the design of the elastic part, so that it can flexibly respond to the impact force of the cooling oil and the centrifugal force of the rotating shaft during operation, automatically adjust the position and spray the cooling oil. This dynamic oil spray design ensures the timely supply of cooling oil, so that the bearing is always in a good cooling environment when in operation. When the motor stops, the elastic part makes the nozzle return to the guide part, avoiding leakage and waste of cooling oil, while reducing the possibility of nozzle contamination, ensuring the effective use of resources.

[0019] In addition, the innovative design of the passive abutment mechanism enhances the function of the cooling system. An end cover is provided in the motor housing, and the rotating shaft and the end cover rotate in cooperation, so that the first injection cavity and the second injection cavity of the nozzle can effectively spray cooling oil into the gap between the ball and the inner ring shaft. This design not only directly cools the bearing, but also applies a thrust toward the outer ring shaft to the nano-insulated bearing sleeve through part of the sprayed cooling oil, ensuring that the insulating sleeve is in close contact with the outer ring shaft. In this way, the spraying of cooling oil not only plays a cooling role, but also enhances the close fit between the rolling bearing and the nano-insulated bearing sleeve through physical contact, effectively delaying the further expansion of the gap, so that the rolling bearing can maintain good insulation performance for a long time, while reducing the possibility of current passing through the bearing. Thereby solving the problem of easy damage between the rotor and the rolling bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of some embodiments of the present application; Figure 2 is a partial cross-sectional view of some embodiments of the present application; Figure 3 yes Figure 2 A magnified view of part A in FIG. Figure 4 It is a partial schematic diagram used to show the nozzle.

[0022] The markings in the figure are: 1. Motor housing; 11. Stator; 12. Rotating shaft; 121. Guide; 122. Guide inner cavity; 123. Step surface; 124. Circular oil baffle; 13. End cover; 131. Outflow pipe; 14. Recovery tank; 141. Filter residue screen; 2. Rolling bearing; 21. Inner ring shaft; 22. Outer ring shaft; 23. Ball; 3. Nano-insulated bearing sleeve; 4. Oil injection mechanism; 41. Nozzle; 411. First injection cavity; 412. Second injection cavity; 413. Drainage Cavity; 414, first connecting part; 415, second connecting part; 42, circulation pipe; 43, first oil pump; 44, oil storage tank; 441, return pipe; 442, second oil pump; 5, elastic member; 6, passive abutment mechanism; 7, pressure component; 71, first annular plate; 72, first spring; 8, rotating component; 81, L-shaped rod; 82, first abutment ball; 83, second abutment ball; 9, abutment component; 91, second annular plate; 92, second spring; 10, telescopic rod. DETAILED DESCRIPTION

[0023] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0024] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0025] In the related technology, high-voltage permanent magnet motor is a kind of electric motor widely used in the industrial and energy fields. It is favored because it can output greater power with smaller size and weight. The core technology of this type of motor is to use permanent magnets to generate a stable magnetic field, thereby efficiently converting electrical energy into mechanical energy. The structure of the high-voltage permanent magnet motor mainly includes a stator, a rotor and a permanent magnet. The stator is composed of windings, which can generate a rotating magnetic field when powered on, and the rotor is embedded with permanent magnets, which rely on the magnetic field generated by the stator to achieve rotational motion. This design enables the high-voltage permanent magnet motor to operate stably under high speed and high load conditions, and is widely used in power systems, rail transportation and large-scale mechanical equipment.

[0026] However, after long-term practice, the applicant found that after long-term operation of high-voltage permanent magnet motors, the damage problem between the rotor and the bearings has become increasingly significant. This problem is mainly due to the high shaft voltage under the working environment and working conditions. Specifically, the existence of the shaft voltage causes shaft current to be generated between the rotor and the bearing, which in turn causes discharge. This discharge not only increases friction loss, but also causes a sharp rise in temperature between the rotor and the bearing, ultimately leading to overheating and damage to the bearing.

[0027] High temperatures have many effects on bearings. First, the physical properties of bearing materials may change under long-term high temperature conditions, resulting in a decrease in their strength and wear resistance. Second, rising temperatures accelerate the deterioration of lubricating oil, reducing its lubricating effect, further increasing friction and wear. In addition, overheated bearings may also cause the lubricating oil to evaporate and leak, forming a more severe cycle and ultimately causing bearing failure.

[0028] At the same time, the applicant also observed that metal powder will be generated during the long-term operation of the bearing, and the abutment between the bearing ball and the outer ring of the bearing will gradually accumulate and form a gap. As the operation time increases, this gap gradually expands, causing metal powder to easily enter between the nano-insulated bearing sleeve and the bearing. This not only further aggravates the wear, but also significantly reduces the insulation performance of the nano-insulated bearing sleeve, making it easier for current to pass, thereby causing potential damage to the internal components of the motor.

[0029] In summary, the current background technology of high-voltage permanent magnet motors has several significant defects: Bearing damage caused by high temperature: Due to the effect of shaft voltage, bearings are prone to overheating, which affects their performance and life.

[0030] Accumulation of metal powder: The metal powder generated during long-term operation will enter between the bearing and the nano-insulating bearing sleeve, causing wear and clearance, thereby affecting the insulation performance.

[0031] Degradation of insulation performance: Due to the intrusion of metal powder and bearing damage, the insulation performance of the nano-insulated bearing sleeve may be significantly reduced, increasing the risk of motor failure.

[0032] Therefore, the current high-voltage permanent magnet motors face the dual challenges of insufficient high-temperature resistance of bearings and reduced insulation performance in design and application. It is urgent to optimize the bearing structure, materials and cooling system to improve its overall performance and reliability. The discovery of this technical problem provides a direction for subsequent improvements and lays the foundation for the design of new high-voltage permanent magnet motors. Through technical innovations targeting the above problems, it will help improve the working efficiency of the motor, extend its service life, and ensure the reliable operation of high-voltage permanent magnet motors in various applications.

[0033] Based on this, this application provides a nano-insulated bearing high-voltage permanent magnet motor. Figure 1~Figure 4 The nano-insulated bearing high-voltage permanent magnet motor includes a motor housing 1, a rolling bearing 2, an oil injection mechanism 4, an elastic member 5 and a passive abutment mechanism 6; wherein a stator 11 is rotatably provided inside the motor housing 1, and a rotating shaft 12 partially extending to the outside of the motor housing 1 is coaxially provided at one end of the stator 11.

[0034] At the same time, the rolling bearing 2 includes an inner ring shaft 21, an outer ring shaft 22 and balls 23. The outer ring shaft 22 is coaxially arranged on the periphery of the inner ring shaft 21. A plurality of balls 23 are rotatably arranged between the inner ring shaft 21 and the outer ring shaft 22. A bearing chamber is arranged on the side wall of the motor housing 1. The outer ring shaft 22 is embedded in the bearing chamber, and the outer ring shaft 22 is sleeved with a nano-insulating bearing sleeve 3. The rotating shaft 12 passes through the inner ring shaft 21 and is interference fit with the inner ring of the inner ring shaft 21.

[0035] Furthermore, the oil injection mechanism 4 includes a nozzle 41, a circulation pipe 42, a first oil pump 43 and an oil storage tank 44. An oil supply cavity is axially provided in the rotating shaft 12, the circulation pipe 42 is arranged in the oil supply cavity, the oil storage tank 44 is arranged on one side of the motor housing 1, the first oil pump 43 is installed on the oil storage tank 44 and the pump inlet end of the first oil pump 43 is connected to the inside of the oil storage tank 44, one end of the circulation pipe 42 is rotatably connected to the pump outlet end of the first oil pump 43, and the other end extends into the oil supply cavity. Exemplarily, a connecting pipe is provided at the pump outlet end of the first oil pump 43, the circulation pipe 42 is linear, and one end of the circulation pipe 42 is coaxial with the connecting pipe, and is rotatably connected to each other through a rotating joint. Furthermore, the rotating shaft 12 is provided with a guide portion 121, the guide portion 121 has a guide inner cavity 122 connected to the oil supply cavity, the guide portion 121 is perpendicular to the rotating shaft 12 and at least two groups are arranged in the circumferential direction of the rotating shaft 12, and the nozzle 41 is movably installed in the guide portion 121 and is connected to the other end of the circulation pipe 42.

[0036] At the same time, the elastic member 5 is installed between the nozzle 41 and the guide portion 121. The elastic member 5 makes the nozzle 41 tend to move into the guide portion 121. When the first oil pump 43 is started and the rotating shaft 12 rotates, the nozzle 41 is partially pushed out of the guide portion 121 under the dual effects of the impact force of the cooling oil entering the nozzle 41 and the centrifugal force when the rotating shaft 12 rotates. When the first oil pump 43 is turned off and the rotating shaft 12 stops rotating, the nozzle 41 retreats into the guide portion 121 under the elastic force of the elastic member 5.

[0037] Exemplarily, an end cover 13 is provided inside the motor housing 1 and near the rolling bearing 2, the rotating shaft 12 passes through the end cover 13 and is rotatably matched with the end cover 13, the guide portion 121 is located inside the end cover 13, the nozzle 41 has a first injection channel 411 and a second injection channel 412, the first injection channel 411 and the second injection channel 412 are both connected to the flow pipe 42, the injection port of the first injection channel 411 is directed toward the gap between the ball 23 and the inner ring shaft 21 after the nozzle 41 moves out of the guide portion 121, and the injection port of the second injection channel 412 is directed toward the passive abutment mechanism 6 after the nozzle 41 moves out of the guide portion 121, and the passive abutment mechanism 6 applies a thrust toward the outer ring shaft 22 to the nano-insulating bearing sleeve 3 under the action of the cooling oil sprayed from the second injection channel 412, so that the nano-insulating bearing sleeve 3 is tightly pressed against the outer ring shaft 22. Exemplarily, the curved portion of the flow pipe 42 where it enters the guide portion 121 from the rotating shaft 12 is a smooth transition curve, which can greatly reduce the flow resistance of the cooling oil when it flows into the nozzle 41.

[0038] On this basis, firstly, the structural design of the motor includes the motor housing 1, the stator 11 and the rotating shaft 12, which ensures that the motor operates efficiently in a compact space. The coaxial design of the rotating shaft 12 enables the motor to maintain good balance and stability while outputting power. This design provides space for the subsequent cooling system and lubrication system, enabling effective thermal management, thereby reducing the bearing temperature and extending its service life.

[0039] Secondly, the selection of rolling bearing 2 and its combination with nano-insulating bearing sleeve 3 significantly improves the insulation performance of the motor. The outer ring shaft 22 is embedded in the bearing chamber of the motor housing 1 and is sleeved with a nano-insulating bearing sleeve 3, which effectively isolates the current and reduces the discharge caused by the current passing through the bearing. This configuration not only reduces the risk of damage to the internal components of the motor by the current, but also improves the overall efficiency of the motor by reducing friction losses. At the same time, the nano-insulating material has excellent high temperature resistance, which further ensures the stability of the motor in high temperature environments.

[0040] The design of the oil injection mechanism 4 provides the necessary cooling solution for the motor. The oil injection mechanism 4 includes a nozzle 41, a circulation pipe 42, a first oil pump 43 and an oil storage tank 44. The cooling oil is guided from the oil storage tank 44 to the bearing by setting an oil supply channel. During the operation of the motor, the first oil pump 43 delivers the cooling oil to the nozzle 41 to ensure that the cooling oil can effectively cover the bearing and take away excess heat. This mechanism significantly reduces the bearing temperature, thereby avoiding the degradation of material performance and wear caused by high temperature, and enhancing the reliability of the bearing.

[0041] The setting of the nozzle 41 is combined with the design of the elastic member 5, so that it can flexibly respond to the impact force of the cooling oil and the centrifugal force of the rotating shaft 12 during operation, automatically adjust the position and spray the cooling oil. This dynamic oil spraying design ensures the timely supply of cooling oil, so that the bearing is always in a good cooling environment when in operation. When the motor stops, the elastic member 5 causes the nozzle 41 to retreat to the guide portion 121, avoiding leakage and waste of cooling oil, while reducing the possibility of contamination of the nozzle 41, ensuring the effective use of resources.

[0042] In addition, the innovative design of the passive abutment mechanism 6 enhances the function of the cooling system. An end cover 13 is provided in the motor housing 1, and the rotating shaft 12 rotates with the end cover 13, so that the first injection cavity 411 and the second injection cavity 412 of the nozzle 41 can effectively spray cooling oil to the gap between the ball 23 and the inner ring shaft 21. This design not only directly cools the bearing, but also applies a thrust toward the outer ring shaft 22 to the nano insulating bearing sleeve 3 through part of the sprayed cooling oil, ensuring that the insulating sleeve is in close contact with the outer ring shaft 22. In this way, the spraying of cooling oil not only plays a cooling role, but also enhances the close fit between the rolling bearing 2 and the nano insulating bearing sleeve 3 through physical contact, effectively delaying the further expansion of the gap, so that the rolling bearing 2 can maintain good insulation performance for a long time, while reducing the possibility of current passing through the bearing.

[0043] In general, the nano-insulated bearing high-voltage permanent magnet motor proposed in the present invention solves the operation problem of high-voltage permanent magnet motors in high temperature and high load environments through the comprehensive optimization of its structure and function. The motor not only improves the overall efficiency and stability, but also extends the service life and reduces maintenance costs. Through the innovation of the cooling system, lubrication system and insulation design, the operating safety and reliability of the motor have been significantly improved, enabling it to show more excellent performance in complex industrial applications. This technological advancement not only promotes the development of the motor field, but also provides an important reference and reference for the future design of high-voltage permanent magnet motors.

[0044] In some embodiments, Figures 2~4 As shown, the nozzle 41 also has a drainage channel 413, and the drainage channel 413 has a first end and a second end. The first end of the drainage channel 413 is connected to the first injection channel 411 and the second injection channel 412 at the same time, and the second end is connected to the circulation tube 42, and the inner diameter of the drainage channel 413 gradually decreases from the first end to the second end. Exemplarily, the injection port of the first injection channel 411 and the injection port of the second injection channel 412 are respectively facing opposite directions, and the first injection channel 411 and the second injection channel 412 are both arc-shaped and bent to opposite sides. Further, the inner diameter of the first injection channel 411 gradually increases from one end close to the drainage channel 413 to the injection port of the first injection channel 411, and the inner diameter of the second injection channel 412 gradually decreases from one end close to the drainage channel 413 to the injection port of the second injection channel 412.

[0045] In this way, the drainage channel 413 allows the cooling oil to be fully guided and flowed before being ejected, ensuring that the cooling oil enters the first injection channel 411 and the second injection channel 412 at an appropriate flow rate and pressure. The design of the gradually decreasing inner diameter of the drainage channel 413 helps to form a certain acceleration effect when the cooling oil flows through, thereby increasing the kinetic energy during injection and enhancing the effect of the nozzle 41 injecting the cooling oil.

[0046] In addition, the arc-shaped design of the first injection cavity 411 and the second injection cavity 412 makes the cooling oil more uniform during the injection process, reduces the problem of uneven cooling caused by local injection, and ensures that most of the cooling oil can reach the high-temperature core area, that is, the gap between the ball 23 and the inner ring shaft 21, so that it can be cooled in time, reducing material fatigue and damage caused by overheating.

[0047] It is worth noting that the inner diameter of the first injection channel 411 gradually increases from one end close to the drainage channel 413 to the injection port. This design helps to appropriately reduce the flow rate of the cooling oil before injection and increase the flow rate, thereby increasing the coverage area of ​​the cooling oil at the gap between the ball 23 and the inner ring shaft 21 and improving the cooling effect. The inner diameter of the second injection channel 412 gradually decreases to form a convergence effect of the injection port. This combination of structures enables the cooling oil to be injected onto the passive abutment mechanism 6 at a higher speed and pressure. In this way, the injected cooling oil can generate a greater impact force, thereby enhancing the close fit between the outer ring shaft 22 of the rolling bearing 2 and the nano insulating bearing sleeve 3 through physical contact, effectively preventing the gap from further expanding. In addition, this structure has the advantage that the flow rate of the first injection channel 411 can be controlled to be larger and the flow rate to be smaller, so as to prevent the impact force of the cooling oil from being too large to damage the gap between the ball 23 and the inner ring shaft 21. The purpose of increasing the flow rate of the second injection cavity 412 is to provide a sufficiently large impact force to allow the passive abutment mechanism 6 to move under force without considering damage. Therefore, the flow rate requirements of the two cooling oils are achieved on the same nozzle 41, which is more conducive to space layout and suitable for the smaller space inside the permanent magnet motor.

[0048] In some embodiments, Figures 2~4 As shown, the connection between the first injection channel 411 and the drainage channel 413 is configured as a first connection portion 414, and the connection between the second injection channel 412 and the drainage channel 413 is configured as a second connection portion 415, and the first connection portion 414 and the second connection portion 415 are both located within the projection of the cross section of the drainage channel 413. Exemplarily, the inner diameter of the first connection portion 414 is greater than the inner diameter of the second connection portion 415.

[0049] On this basis, first, the inner diameter of the first connecting portion 414 is larger than the inner diameter of the second connecting portion 415. This design allows the cooling oil to appropriately reduce the flow rate and increase the flow rate when flowing into the first injection cavity 411, thereby effectively expanding the coverage area of ​​the cooling oil at the gap between the ball 23 and the inner ring shaft 21. This improvement enhances the cooling effect, ensures that the bearing part can obtain sufficient cooling, and reduces the risk of wear caused by overheating. On the other hand, the inner diameter of the second connecting portion is smaller, forming a convergence effect of the injection port, so that the cooling oil can be injected into the passive abutment mechanism 6 at a higher speed and pressure after entering the second injection cavity 412. This impact force not only improves the injection efficiency of the cooling oil, but also enhances the close fit between the outer ring shaft 22 of the rolling bearing 2 and the nano insulating bearing sleeve 3 through physical contact, effectively preventing the gap from further expanding. This design combination enables the entire cooling system to play a more efficient cooling and insulation role in the high-voltage permanent magnet motor, thereby improving the reliability and service life of the motor.

[0050] In some embodiments, Figures 2~4 As shown, the elastic member 5 includes a compression spring, the portion of the flow tube 42 connected to the nozzle 41 is a telescopic tube section, and the compression spring is sleeved on the outside of the telescopic tube section. Exemplarily, the inner wall of the guide cavity 122 is provided with a step surface 123, one end of the compression spring is connected to the step surface 123, and the other end is connected to the end of the nozzle 41.

[0051] On this basis, the setting of the compression spring enables the nozzle 41 to maintain a stable pressure and position during the cooling oil injection process. When the first oil pump 43 is started and the rotating shaft 12 rotates, the dual effects of the flow of cooling oil and centrifugal force partially push out the nozzle 41. This process is regulated by the compression spring to ensure that the nozzle 41 can smoothly and accurately aim at the target area during the injection process. At the same time, by setting a telescopic pipe section on the circulation pipe 42, the movement range of the nozzle 41 is expanded, so that it can flexibly adapt to the dynamic changes of the rotating shaft 12 during the injection process, and adaptively extend in the guide part 121 while maintaining communication with the circulation pipe 42. This design not only improves the flexibility and coverage of the injection, but also ensures that the cooling oil can be evenly sprayed on various key parts of the rolling bearing 2, effectively improving the cooling effect.

[0052] In addition, the connection design between the step surface 123 of the guiding inner cavity 122 and the compression spring further enhances the stability of the system. When the nozzle 41 moves under the action of the elastic member 5, the setting of the step surface 123 can effectively limit the movement range of the nozzle 41, prevent it from excessively deviating from the preset position, and ensure the injection accuracy and consistency. This structural optimization enables the cooling oil to form a relatively stable flow state during the injection process.

[0053] Exemplarily, an anti-slip flange (not shown in the figure) is provided on the opening edge of the guide portion 121 located in the guide inner cavity 122, and an anti-slip convex edge (not shown in the figure) which is in conflict with the anti-slip flange is axially provided on the outer wall of the nozzle 41, thereby preventing the nozzle 41 from completely detaching from the guide portion 121, thereby improving the connection stability between the two.

[0054] In some embodiments, reference Figures 2~4 The passive abutment mechanism 6 includes a pressure-bearing component 7, a rotating component 8 and an abutment component 9. The rotating component 8 can be movably arranged on the inner wall of the end cover 13. The pressure-bearing component 7 and the abutment component 9 are respectively arranged at both ends of the rotating component 8. When the nozzle 41 is partially pushed out from the guide part 121 under the dual effects of the impact force of the cooling oil entering the nozzle 41 and the centrifugal force when the rotating shaft 12 rotates, the cooling oil sprayed from the injection port of the second injection cavity 412 will be directly sprayed onto the pressure-bearing component 7 and exert an impact force on the pressure-bearing component 7, and drive the rotating component 8 to rotate and drive the abutment component 9 to abut against the nano-insulating bearing sleeve 3, so that the nano-insulating bearing sleeve 3 is tightly pressed against the outer ring shaft 22 after being subjected to force.

[0055] Exemplarily, the pressure component 7 includes a first annular plate 71 and a first spring 72, the first annular plate 71 is connected to the inner side wall of the end cover 13 through the first spring 72, and along the axial direction of the rotating shaft 12, the annular plate surface of the first annular plate 71 is always directly opposite to the injection port of the second injection channel 412 of the removal guide 121. At the same time, the abutment component 9 includes a second annular plate 91 and a second spring 92, the second annular plate 91 is connected to the inner side wall of the end cover 13 through the second spring 92, and along the axial direction of the rotating shaft 12, the annular plate surface of the second annular plate 91 is always in contact with the side surface of the nano insulating bearing sleeve 3.

[0056] Further, the rotating assembly 8 includes an L-shaped rod 81, a first abutting ball 82 and a second abutting ball 83, the bending part of the L-shaped rod 81 is rotatably connected to the inner side wall of the end cover 13, the first abutting ball 82 is arranged at one end of the L-shaped rod 81 and is used to slide and abut with the plate surface of the first annular plate 71 away from the nozzle 41, and the second abutting ball 83 is arranged at the other end of the L-shaped rod 81 and is used to slide and abut with the plate surface of the second annular plate 91 away from the nano insulating bearing sleeve 3, wherein, after the first annular plate 71 is impacted by the cooling oil, the first abutting ball 82 is pushed, and the L-shaped rod 81 is driven to rotate after being subjected to force, so that the second abutting ball 83 pushes the second annular plate 91 to abut against the side of the nano insulating bearing sleeve 3. Exemplarily, the L-shaped rod can also be configured to be formed into a V shape, and the specific shape setting can be determined according to the on-site installation situation. It is worth noting that the nozzle 41 is configured as a high-pressure nozzle 41, so that the impact force of the cooling oil sprayed from the second cavity is greater than the centrifugal force, so that the cooling oil sprayed from the second cavity is not easily affected by the centrifugal force and caused to deviate.

[0057] On this basis, first, the pressure component 7 is composed of the first annular plate 71 and the first spring 72, and is connected to the inner wall of the end cover 13 through the first spring 72 to form a flexible support structure. The annular surface of the first annular plate 71 always maintains a positive relationship with the injection port of the second injection channel 412. This design ensures that each time the cooling oil of the second injection channel 412 is ejected, the ejected cooling oil can effectively and directly impact the first annular plate 71, thereby transmitting the impact force to the pressure component 7.

[0058] When the cooling oil is sprayed out through the second injection cavity 412, its impact force and the centrifugal force of the rotating shaft 12 work together to push the pressure component 7 to move. After being impacted by the cooling oil, the first annular plate 71 will push the first abutment ball 82 to rotate the L-shaped rod 81 in the rotating component 8. The movement of the L-shaped rod 81 will further drive the second abutment ball 83, and then apply force to the second annular plate 91. The second annular plate 91 is connected to the inner wall of the end cover 13 through the second spring 92, and is always in contact with the side of the nano-insulating bearing sleeve 3. This movement mechanism ensures that the nano-insulating bearing sleeve 3 can be tightly abutted against the outer ring shaft 22 after being subjected to force, reducing the risk of reduced insulation performance due to gaps.

[0059] Through this design, the cooling oil not only plays a cooling role, but also enhances the activity and reliability of the rotating component 8 through direct physical contact. The impact force generated by the injection of cooling oil enables each component to respond quickly, thereby realizing instant adjustment and tightening of the nano-insulated bearing sleeve 3. This dynamic adjustment mechanism can effectively prevent the gap between the rolling bearing 2 and the nano-insulated bearing sleeve 3 from expanding due to thermal expansion and long-term operation in the actual application of high-voltage permanent magnet motors, especially under high load and high speed conditions.

[0060] Furthermore, the L-shaped rod 81 structural design of the rotating assembly 8 makes the force transmission between the pressure assembly 7 and the abutment assembly 9 more efficient, reducing energy loss. In addition, the design can adapt to the small movements that may occur in the bearing during operation, thereby maintaining close contact between the nano-insulated bearing sleeve 3 and the outer ring shaft 22 to ensure that the insulation performance is not damaged. This combination not only improves the operating efficiency of the motor, but also enhances its stability and reliability under complex working conditions.

[0061] In some embodiments, reference Figure 3~4, the inner circles of the first spring 72 and the second spring 92 are both provided with telescopic rods 10, the telescopic directions of the two telescopic rods 10 are parallel to the axial direction of the rotating shaft 12, and one end of the telescopic rod 10 is connected to the inner side wall of the end cover 13, and the other end is connected to the first annular plate 71 and the second annular plate 91. In this way, by providing the telescopic rods 10 in the inner circles of the first spring 72 and the second spring 92, the running stability of the first annular plate 71 and the second annular plate 91 in the axial direction of the rotating shaft 12 is significantly improved. The design of the telescopic rod 10 makes its telescopic direction parallel to the axial direction of the rotating shaft 12, which can effectively prevent the first annular plate 71 and the second annular plate 91 from radially offsetting, so that the first annular plate 71 can remain aligned with the injection port of the second injection cavity 412, and the second annular plate 91 can remain in contact with the side of the nano-insulated bearing sleeve 3.

[0062] In some embodiments, Figure 1 , 2 As shown, an outflow pipe 131 is provided at the lowest end of the end cover 13, and a recovery tank 14 is provided on one side of the motor housing 1, and the outflow pipe 131 opens at one end away from the end cover 13 and opens at the upper end of the recovery tank 14. This arrangement allows the cooling oil after injection to quickly flow out to the recovery tank 14 through the outflow pipe 131, thereby avoiding the retention and possible contamination of the cooling oil inside the motor housing 1. This design not only effectively prevents the accumulation of cooling oil, but also reduces the risk of failure caused by the accumulation of oil stains, thereby ensuring the reliability of the motor during long-term operation. In addition, the outflow pipe 131 opens at one end away from the end cover 13 and opens at the upper end of the recovery tank 14, thereby forming an effective reflux system and promoting the recycling of cooling oil. Through such a design, the cooling oil forms a closed loop during the injection, recovery and reuse process, which helps to reduce energy consumption and reduce the waste of cooling oil.

[0063] In some embodiments, in combination Figure 1 , 2 , a filter residue mesh plate 141 is provided in the recovery tank 14, and the filter residue mesh plate 141 divides the recovery tank 14 into an upper storage chamber and a lower storage chamber, and the metal powder in the cooling oil stays in the upper storage chamber under the blocking effect of the filter residue mesh plate 141. Exemplarily, a return pipe 441 is connected between the oil storage tank 44 and the lower storage chamber, and a second oil pump 442 is provided on the return pipe 441, and the second oil pump 442 is used to pump the cooling oil in the lower storage chamber into the oil storage tank 44. On this basis, the setting of the filter residue mesh plate 141 enables the cooling oil to effectively block and collect the metal powder and impurities therein during the recovery process. This design not only prevents the metal powder from circulating in the cooling oil and avoids further wear of the internal components of the motor, but also ensures the purity of the cooling oil, thereby improving the cooling effect and the service life of the rolling bearing 2.

[0064] The design of the upper storage chamber allows the collected metal powder to be deposited here, preventing it from re-entering the cooling system and reducing the risk of failure caused by impurities. At the same time, the design of the return pipe 441 between the lower storage chamber and the oil storage tank 44, plus the use of the second oil pump 442, allows the cooling oil in the lower storage chamber to be quickly extracted and pumped back to the oil storage tank 44, achieving efficient circulation of the cooling oil. This closed-loop system not only improves the efficiency of cooling oil use, but also reduces cooling oil consumption, thereby reducing operating costs.

[0065] Through this multi-level cooling oil management system, the motor can maintain stable temperature control and efficient heat dissipation during long-term operation, ensuring the safety and reliability of the motor. In addition, the system also facilitates motor maintenance, allowing operators to easily monitor and manage the status of the cooling oil, thereby further improving the overall performance and service life of the equipment.

[0066] In some embodiments, reference Figure 1 , 2 , the part of the rotating shaft 12 outside the motor housing 1 is coaxially provided with a circular oil baffle 124, the outer diameter of the circular oil baffle 124 is larger than the outer diameter of the rolling bearing 2, and the gap between the circular oil baffle 124 and the motor housing 1 is located directly above the upper end opening of the recovery tank 14. In this way, during the working process, after the cooling oil is sprayed into the gap between the ball 23 and the inner ring shaft 21 through the injection port of the first injection cavity 411, it is very likely to leak out from one side outside the motor housing 1, and the existence of the circular oil baffle 124 can guide the unused cooling oil back to the recovery tank 14 to avoid its waste. This design effectively reduces the loss of cooling oil, improves the operating efficiency of the motor, and creates conditions for the recycling of cooling oil. At the same time, the circular oil baffle 124 also plays a role of physical isolation, protecting other components of the motor from the impact of cooling oil splashing, thereby reducing the potential risk of failure. In general, this design not only optimizes the performance of the cooling system, but also improves the reliability and safety of the motor, ensuring its stable operation under high pressure and high load working conditions.

[0067] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A nano-insulated bearing high-voltage permanent magnet motor, characterized in that: include: A motor housing (1), wherein a stator (11) is rotatably disposed inside the motor housing (1), and a rotating shaft (12) partially extending to the outside of the motor housing (1) is coaxially disposed at one end of the stator (11); A rolling bearing (2), comprising an inner ring shaft (21), an outer ring shaft (22) and balls (23), wherein the outer ring shaft (22) is coaxially arranged on the periphery of the inner ring shaft (21), a plurality of balls (23) are rotatably arranged between the inner ring shaft (21) and the outer ring shaft (22), a bearing chamber is arranged on the side wall of the motor housing (1), the outer ring shaft (22) is embedded in the bearing chamber, and a nano-insulated bearing sleeve (3) is sleeved on the outer ring shaft (22), and the rotating shaft (12) passes through the inner ring shaft (21) and is interference fit with the inner ring of the inner ring shaft (21); The oil injection mechanism (4) comprises a nozzle (41), a circulation pipe (42), a first oil pump (43) and an oil storage tank (44); an oil supply cavity is axially arranged in the rotating shaft (12); the circulation pipe (42) is arranged in the oil supply cavity; the oil storage tank (44) is arranged on one side of the motor housing (1); the first oil pump (43) is mounted on the oil storage tank (44) and the pump inlet end of the first oil pump (43) is connected to the interior of the oil storage tank (44); one end of the circulation pipe (42) The rotating shaft (12) is rotatably connected to the pump outlet end of the first oil pump (43), and the other end extends into the oil supply cavity. The rotating shaft (12) is provided with a guide portion (121), and the guide portion (121) has a guide inner cavity (122) connected to the oil supply cavity. The guide portion (121) is perpendicular to the rotating shaft (12) and at least two groups are arranged in the circumferential direction of the rotating shaft (12). The nozzle (41) is movably installed in the guide portion (121) and is connected to the other end of the flow pipe (42); an elastic member (5) installed between the spray head (41) and the guide portion (121); the elastic member (5) causes the spray head (41) to have a tendency to move into the guide portion (121); when the first oil pump (43) is started and the rotating shaft (12) rotates, the spray head (41) is partially pushed out of the guide portion (121) under the dual effects of the impact force of the cooling oil entering the spray head (41) and the centrifugal force when the rotating shaft (12) rotates; when the first oil pump (43) is turned off and the rotating shaft (12) stops rotating, the spray head (41) retreats into the guide portion (121) under the elastic force of the elastic member (5); A passive abutment mechanism (6), an end cover (13) is provided in the motor housing (1) and near the rolling bearing (2), the rotating shaft (12) passes through the end cover (13) and is rotatably matched with the end cover (13), the guide portion (121) is located in the end cover (13), the nozzle (41) has a first injection cavity (411) and a second injection cavity (412), the first injection cavity (411) and the second injection cavity (412) are both connected to the flow pipe (42), the injection port of the first injection cavity (411) is located in the nozzle After the nozzle head (41) moves out of the guide portion (121), it faces the gap between the ball (23) and the inner ring shaft (21). After the nozzle head (41) moves out of the guide portion (121), the injection port of the second injection cavity (412) faces the passive abutment mechanism (6). Under the action of the cooling oil sprayed from the second injection cavity (412), the passive abutment mechanism (6) applies a thrust toward the outer ring shaft (22) to the nano-insulating bearing sleeve (3), so that the nano-insulating bearing sleeve (3) is tightly pressed against the outer ring shaft (22).

2. A nano-insulated bearing high-voltage permanent magnet motor according to claim 1, characterized in that: The nozzle (41) further comprises a drainage cavity (413), wherein the drainage cavity (413) comprises a first end and a second end, wherein the first end of the drainage cavity (413) is connected to both the first injection cavity (411) and the second injection cavity (412), and the second end is connected to the flow pipe (42), and the inner diameter of the drainage cavity (413) gradually decreases from the first end to the second end; The injection port of the first injection channel (411) and the injection port of the second injection channel (412) face opposite directions respectively, and the first injection channel (411) and the second injection channel (412) are both arc-shaped and bend toward opposite sides, wherein: The inner diameter of the first injection channel (411) gradually increases from one end close to the drainage channel (413) to the injection port of the first injection channel (411), and the inner diameter of the second injection channel (412) gradually decreases from one end close to the drainage channel (413) to the injection port of the second injection channel (412).

3. A nano-insulated bearing high-voltage permanent magnet motor according to claim 2, characterized in that: The connection between the first injection cavity (411) and the drainage cavity (413) is configured as a first connection portion (414), and the connection between the second injection cavity (412) and the drainage cavity (413) is configured as a second connection portion (415), and the first connection portion (414) and the second connection portion (415) are both located within the projection of the cross section of the drainage cavity (413), wherein: The inner diameter of the first communication portion (414) is greater than the inner diameter of the second communication portion (415).

4. The nano-insulated bearing high-voltage permanent magnet motor according to claim 1, characterized in that: The elastic member (5) comprises a compression spring, the portion of the flow pipe (42) connected to the nozzle (41) is a telescopic pipe section, and the compression spring is sleeved on the outside of the telescopic pipe section; The inner side wall of the guide inner cavity (122) is provided with a step surface (123); one end of the compression spring is connected to the step surface (123), and the other end is connected to the end of the nozzle (41).

5. The nano-insulated bearing high-voltage permanent magnet motor according to claim 2, characterized in that: The passive abutment mechanism (6) comprises a pressure-bearing component (7), a rotating component (8) and an abutment component (9), wherein the rotating component (8) is movably arranged on the inner wall of the end cover (13), and the pressure-bearing component (7) and the abutment component (9) are respectively arranged at two ends of the rotating component (8), wherein: When the nozzle (41) is partially pushed out of the guide portion (121) under the dual effects of the impact force of the cooling oil entering the nozzle (41) and the centrifugal force when the rotating shaft (12) rotates, the cooling oil sprayed from the injection port of the second injection cavity (412) will be directly sprayed onto the pressure-bearing component (7) and exert an impact force on the pressure-bearing component (7), and drive the rotating component (8) to rotate and drive the abutment component (9) to abut against the nano-insulating bearing sleeve (3), so that the nano-insulating bearing sleeve (3) is tightly pressed against the outer ring shaft (22) after being subjected to force.

6. The nano-insulated bearing high-voltage permanent magnet motor according to claim 5, characterized in that: The pressure-bearing component (7) comprises a first annular plate (71) and a first spring (72); the first annular plate (71) is connected to the inner side wall of the end cover (13) via the first spring (72); along the axial direction of the rotating shaft (12), the annular plate surface of the first annular plate (71) is always directly opposite to the injection port of the second injection channel (412) moved out of the guide portion (121); The abutment assembly (9) comprises a second annular plate (91) and a second spring (92); the second annular plate (91) is connected to the inner side wall of the end cover (13) via the second spring (92); along the axial direction of the rotating shaft (12), the annular plate surface of the second annular plate (91) is always in contact with the side surface of the nano insulating bearing sleeve (3); The rotating assembly (8) comprises an L-shaped rod (81), a first abutment ball (82) and a second abutment ball (83); the bending part of the L-shaped rod (81) is rotatably connected to the inner side wall of the end cover (13); the first abutment ball (82) is arranged at one end of the L-shaped rod (81) and is used for slidingly abutting against the plate surface of the first annular plate (71) away from the nozzle (41); the second abutment ball (83) is arranged at the other end of the L-shaped rod (81) and is used for slidingly abutting against the plate surface of the second annular plate (91) away from the nano insulating bearing sleeve (3), wherein: After the first annular plate (71) is impacted by cooling oil, it pushes the first abutting ball (82), driving the L-shaped rod (81) to rotate after being subjected to force, so that the second abutting ball (83) pushes the second annular plate (91) to abut against the side surface of the nano insulating bearing sleeve (3).

7. The nano-insulated bearing high-voltage permanent magnet motor according to claim 6, characterized in that: A telescopic rod (10) is provided in the inner circle of the first spring (72) and the second spring (92), the telescopic direction of the two telescopic rods (10) is parallel to the axial direction of the rotating shaft (12), and one end of the telescopic rod (10) is connected to the inner side wall of the end cover (13), and the other end is connected to the first annular plate (71) and the second annular plate (91).

8. A nano-insulated bearing high-voltage permanent magnet motor according to any one of claims 1 to 7, characterized in that: An outflow pipe (131) is provided at the lowest end of the end cover (13), a recovery tank (14) is provided on one side of the motor housing (1), and an end of the outflow pipe (131) away from the end cover (13) opens toward an upper end of the recovery tank (14).

9. The nano-insulated bearing high-voltage permanent magnet motor according to claim 8, characterized in that: A filter residue mesh plate (141) is provided in the recovery tank (14), and the filter residue mesh plate (141) divides the recovery tank (14) into an upper storage chamber and a lower storage chamber, and the metal powder in the cooling oil stays in the upper storage chamber under the blocking effect of the filter residue mesh plate (141); A return pipe (441) is connected between the oil storage tank (44) and the lower storage chamber. A second oil pump (442) is provided on the return pipe (441). The second oil pump (442) is used to pump the cooling oil in the lower storage chamber into the oil storage tank (44).

10. The nano-insulated bearing high-voltage permanent magnet motor according to claim 1, characterized in that: A circular oil baffle plate (124) is coaxially provided on the portion of the rotating shaft (12) located outside the motor housing (1); the outer diameter of the circular oil baffle plate (124) is larger than the outer diameter of the rolling bearing (2); and a gap between the circular oil baffle plate (124) and the motor housing (1) is located directly above the upper end opening of the recovery tank (14).

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