Driving centrally-mounted magnetic suspension power system, rotor wing system and aircraft thereof

Abstract

The utility model discloses a driving middle-mounted magnetic suspension power system, a rotor wing system and an aircraft thereof, relates to the technical field of rotor wing power systems, and solves the technical problems that an existing device is large in size and weight and high in control difficulty. The motor comprises a driving system, the driving system comprises a rotating assembly and at least one stator, the rotating assembly comprises a central shaft and at least one rotor, the rotor is connected to the central shaft, one side, far away from the stator, of one rotor is provided with an axial magnetic suspension bearing, and the other side of the rotor is provided with an axial magnetic suspension bearing. The rotor and the stator form a driving motor, a radial mechanical limiting bearing mechanism and a rotor wing are arranged on the central shaft, the radial mechanical limiting bearing mechanism is arranged above and / or below the driving motor, and the rotor wing mechanism has the advantages of being compact in structure, light in weight, good in controllability and the like.

Description

Technical Field

[0001] This utility model belongs to the field of rotor power system technology, specifically relating to a drive-mid-mounted magnetic levitation power system, a rotor system and its aircraft. Background Technology

[0002] Magnetic levitation technology is an advanced technology based on electromagnetic principles. It utilizes the attractive or repulsive forces generated by a magnetic field to maintain a certain distance between an object and its supporting surface, thereby achieving levitation. Magnetic levitation technology has advantages such as frictionless operation, low noise, high precision, and stable operation. As magnetic levitation technology continues to develop and mature, its application prospects in rotor power systems are becoming increasingly broad. On the one hand, the contactless and frictionless characteristics of magnetic levitation supports can significantly increase the rotational speed of the rotor rings, thereby improving the rotor's lift and flight efficiency. On the other hand, because magnetic levitation supports eliminate the friction and vibration of traditional mechanical bearings, the vibration and noise levels of the rotor are significantly reduced, improving the rotor's reliability.

[0003] The document CN118984017A discloses a magnetic levitation rotor power system driven by a disc motor and its aircraft, including a rotor, a drive system and a magnetic levitation system. The drive system includes a rotating component and at least one motor stator. The rotating component includes a rotating shaft and at least one rotor ring, with the rotor ring fixed on the rotating shaft. The magnetic levitation system includes a radial limiting component and an axial magnetic levitation support component. However, in this device, the radial limiting component is a controllable magnetic levitation component. In addition, axial levitation support components are provided on both sides of the drive system. Therefore, this structure makes the overall volume and weight of the rotor power system relatively large, and increases the difficulty of electromagnetic control.

[0004] Based on the problems existing in the aforementioned patents, it is necessary to research a magnetic levitation rotor propulsion system that is smaller and lighter, and easier to control. Utility Model Content

[0005] This invention provides a mid-drive magnetic levitation power system, a rotor system, and an aircraft thereof, aiming to solve the technical problems of existing devices being large in size and weight and difficult to control.

[0006] To solve the aforementioned technical problems, the present invention adopts the following technical solution:

[0007] A mid-mounted magnetic levitation propulsion system includes a drive system.

[0008] The drive system includes a rotating assembly and at least one stator. The rotating assembly includes a central shaft and at least one rotor. The rotor and stator constitute a drive motor. The rotor is connected to the central shaft, and one of the rotors has an axial magnetic levitation bearing on its side away from the stator.

[0009] A radial mechanical limiting bearing mechanism is provided on the central shaft, and the radial mechanical limiting bearing mechanism is located above and / or below the drive motor.

[0010] After adopting this technical solution, it should be noted that the axial magnetic levitation bearing can significantly improve the performance of the power system through non-contact magnetic force transmission, achieving efficient, low-friction, and contactless operation, thereby reducing energy consumption during high-speed operation. Furthermore, in this invention, only one axial magnetic levitation bearing is used, simplifying the structure of the power system and reducing its overall mass. Finally, in this invention, the radial mechanical limiting bearing mechanism serves as a mechanical protection mechanism. Compared to existing radial protection structures using magnetic levitation support, this significantly simplifies the structure of the power system, resulting in a more compact system. The single-sided axial magnetic levitation bearing and the radial mechanical limiting bearing mechanism work together to reduce the number of suspended components, significantly reducing the weight and axial length of the power system. Moreover, the reduced number of suspended components simplifies the control of this power system.

[0011] Preferably, the radial mechanical limiting bearing mechanism includes a radial mechanical bearing and a sliding assembly.

[0012] The sliding assembly includes a guide rail and a bearing support. The guide rail and the bearing support are slidably engaged. The guide rail is disposed on the side of the central shaft, and the radial mechanical bearing is connected to the bearing support.

[0013] After adopting this technical solution, it should be noted that two guide rails are symmetrically arranged on the side of the central shaft, and a bearing support is slidably arranged on each guide rail. The bearing support is provided with a slot, which is used to fix the inner ring of the radial mechanical bearing. When the central shaft rotates, the guide rail, the bearing support and the inner ring of the radial mechanical bearing will rotate accordingly.

[0014] Furthermore, in this invention, the central shaft can move axially within 3mm above and below the equilibrium position compared to the radial mechanical bearing, ensuring that the radial mechanical bearing always limits the central shaft in the radial direction, thereby improving the stability of the drive motor during high-speed rotation.

[0015] Preferably, an axial protection component is provided above and / or below the drive motor. The axial protection component provided above the drive motor is an upper axial protection component, and the axial protection component provided below the drive motor is a lower axial protection component. The upper and lower axial protection components help to withstand axial forces in various stages of flight and under extreme conditions, thereby protecting the drive motor.

[0016] Preferably, when the radial mechanical limiting bearing mechanism and the axial magnetic levitation bearing are located on the same side of the drive motor, the radial mechanical limiting bearing mechanism is located between the axial magnetic levitation bearing and the central shaft.

[0017] After adopting this technical solution, it should be noted that in this application, the radial mechanical limiting bearing mechanism is set inside the axial magnetic levitation bearing, that is, the radial mechanical limiting bearing mechanism is located between the axial magnetic levitation bearing and the central shaft. This setting further reduces the axial length of the power system, making the power system more compact.

[0018] Furthermore, the drive motor, radial mechanical limit bearing mechanism, and axial magnetic levitation bearing are all housed within the housing and are fixed and limited by the housing, with both ends of the central shaft penetrating through the housing.

[0019] After adopting this technical solution, it should be noted that the inner wall of the outer shell is provided with limiting grooves corresponding to each component, and the limiting grooves are used to limit the movement of each component of the power system.

[0020] Preferably, based on the position of the drive motor, when the radial mechanical limiting bearing mechanism and the axial magnetic levitation bearing are located on opposite sides of the drive motor, a limiting plate is provided inside the housing, the radial mechanical limiting bearing mechanism is connected to the limiting plate, and a mounting plate is provided above or below the limiting plate.

[0021] After adopting this technical solution, it should be noted that the limiting plate has two functions. First, it connects with the outer ring of the corresponding radial mechanical bearing to limit the corresponding mechanical bearing. Second, the limiting plate creates two cavities inside the outer shell on both sides of the limiting plate. These cavities provide heat dissipation space, which is beneficial for the heat dissipation of the drive motor. Sensors can also be installed in the cavities to monitor the operation of the drive motor. Finally, the cavities also help to reduce the weight of the device.

[0022] Preferably, when the axial magnetic levitation bearing and the mounting plate are located below and above the drive motor, respectively, the upper axial protection component is located between the drive motor and the mounting plate, and the lower axial protection component is located between the drive motor and the axial magnetic levitation bearing.

[0023] When the axial magnetic bearing and the mounting plate are located above and below the drive motor, respectively, the upper axial protection component is located between the drive motor and the axial magnetic bearing, and the lower axial protection component is located between the drive motor and the mounting plate.

[0024] After adopting this technical solution, it should be noted that the purpose of setting the mounting plate is to install the axial protection component. Specifically, when the mounting plate is above the drive motor, the upper axial protection component is installed on the lower end face of the mounting plate; when the mounting plate is below the drive motor, the lower axial protection component is located on the upper end face of the mounting plate.

[0025] Preferably, the upper axial protection component or the lower axial protection component is circumferentially distributed on the lower or upper end face of the mounting plate. This arrangement improves the axial load-bearing capacity of the axial protection component and extends its service life. On the other hand, the circumferentially distributed axial protection components help to evenly distribute axial force, provide more stable support, and improve the reliability of the power system.

[0026] Preferably, the axial magnetic levitation bearing includes an iron core and a coil, the coil being embedded in the iron core, and the upper axial protection component or the lower axial protection component being disposed on the end face of the iron core near the drive motor.

[0027] Preferably, the upper axial protection component or the lower axial protection component is evenly distributed along the iron core in an axial direction.

[0028] After adopting this technical solution, it should be noted that the iron core is an E-type iron core, and the coil is inserted into the groove of the E-type iron core in a ring shape. The axial protection component includes a support body and rolling elements. The rolling elements can be bearings or rollers, etc. The rolling elements are rolled and embedded in the support body. The support body is connected to the outer ring surface of the iron core by bolts. The axial protection component is evenly distributed circumferentially on the iron core. Its function is the same as that of the distribution method of the axial protection component on the mounting plate, and will not be described again here.

[0029] Preferably, the drive motor is provided with radial mechanical limiting bearing mechanisms on both its upper and lower sides. The radial mechanical limiting bearing mechanisms are a first radial mechanical limiting bearing mechanism and a second radial mechanical limiting bearing mechanism, wherein the second radial mechanical limiting bearing mechanism and the axial magnetic levitation bearing are located on the same side of the drive motor, and the first radial mechanical limiting bearing mechanism and the axial magnetic levitation bearing are located on opposite sides of the drive motor.

[0030] After adopting this technical solution, it should be noted that the outer ring of the radial mechanical bearing of the first radial mechanical limiting bearing mechanism is connected to the limiting plate for limiting, while the outer ring of the radial mechanical bearing of the second radial mechanical limiting bearing mechanism is connected to the interior of the axial magnetic levitation bearing. When the central shaft moves axially, the guide rail and the central shaft move relative to the corresponding bearing support and radial mechanical bearing. By setting the second radial mechanical limiting bearing mechanism inside the axial magnetic levitation bearing, the axial length of the power system is further reduced, making the power system more compact.

[0031] Furthermore, it should be noted that the first radial mechanical limiting bearing mechanism and the second radial mechanical limiting bearing mechanism have the same structure, both including radial mechanical bearings and sliding parts. The connection relationship between the sliding parts and the central shaft, as well as the connection relationship between the radial mechanical bearings and the sliding parts, has been explained and will not be repeated here. Therefore, in this utility model, the final structure that constitutes a single-sided axial magnetic levitation bearing, a double-sided axial protection component, and a double-sided radial mechanical limiting bearing mechanism reduces weight and length. Combined with the second radial mechanical limiting bearing mechanism located inside the space between the axial magnetic levitation bearing and the central shaft, the axial length of the power system is further reduced.

[0032] Preferably, the drive motor includes N stators and N+1 rotors, where N≥1 and N is a natural number;

[0033] When N=1, the drive motor includes one stator and two rotors, namely an upper rotor and a lower rotor, which are located on the upper and lower sides of the stator, respectively.

[0034] When N≥2, taking the central axis as the reference, the rotor ring at the uppermost end of the central axis is the upper rotor, the rotor at the lowermost end of the central axis is the lower rotor, and the rotor between the upper and lower rotors is the middle rotor.

[0035] After adopting this technical solution, it should be noted that, in order to improve the efficiency of the power system and the compactness of the structure, a double-sided motor is set up. That is, a motor stator and two rotors at the top and bottom form a drive unit. The double-sided motor can increase the power density of the motor, so that higher power output can be obtained in a limited space, providing a basis for the high-speed rotation of the drive center shaft. In addition, the compact structure of the double-sided motor reduces the complexity of the transmission mechanism and improves space utilization and power transmission efficiency. In order to further improve the lift, multiple double-sided motors can be set up, and axial magnetic levitation bearings can be set at the top or bottom of the rotor of the drive motor. High-efficiency, stable and reliable operation can be achieved by controlling the levitation force of the axial magnetic levitation bearings at different positions at the top and bottom.

[0036] A rotor system includes the aforementioned drive-centrally mounted magnetic levitation power system, wherein a rotor is provided at the upper end and / or lower end of the central shaft, thereby constituting a rotor power system. The rotor can be configured as a single-layer rotor or a double-layer rotor to adapt to different working scenarios.

[0037] Preferably, the outer casing is provided with multiple heat dissipation fins, which are arranged along the four sides of the outer casing. The heat dissipation fins increase the heat dissipation area and make the heat dissipation efficiency higher.

[0038] Preferably, the central shaft includes a spline shaft and a spline sleeve, the upper rotor and / or the lower rotor are respectively connected to the upper part and / or the lower part of the spline shaft, both ends of the spline shaft are connected to the spline sleeve, the side of the spline sleeve is provided with the guide rail, the ends of the spline sleeve away from the stator are equipped with the rotor and the rotor is limited by the pressure cap.

[0039] Preferably, the outer shell is further provided with a connecting part for fixing the rotor system to other bodies.

[0040] The working principle of this utility model:

[0041] The central shaft is driven to rotate by a disc-type central motor structure, which in turn drives the rotors at both ends of the central shaft to rotate, thereby increasing lift. During the operation of the motor, the axial magnetic levitation bearing transmits thrust through non-contact, achieving efficient, low-friction, and contactless operation. This reduces energy consumption and heat generation in the rotor system during high-speed operation. The radial mechanical limit bearing mechanism ensures the radial stability of the central shaft, and the rotor has 3mm of axial movement above and below the equilibrium position. The guide rail slider mechanism ensures smooth axial movement of the rotor.

[0042] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0043] 1. This utility model simplifies the structure of the power system and reduces the total mass and size of the system by setting a single-sided axial magnetic levitation bearing. By setting the radial bearing protection mechanism as a mechanical protection mechanism, the structure of the power system is simplified and the control difficulty is reduced compared with the existing radial protection structure using magnetic levitation support.

[0044] 2. By setting up a double-sided radial mechanical limit and a single-sided axial magnetic levitation bearing, and cooperating with the second radial mechanical limit bearing mechanism located in the space between the axial magnetic levitation bearing and the central shaft, the length of the rotor power system in the axial direction is further reduced. While ensuring the stability and reliability of the system, the weight is reduced and the axial dimension is decreased.

[0045] 3. By setting the guide rail and bearing support to slide on the guide rail, the rotating component can generate an axial movement of 3mm above and below the equilibrium position relative to the radial mechanical limit bearing mechanism, ensuring smooth axial movement of the rotor part.

[0046] 4. This utility model improves axial load capacity and extends service life by using circumferentially distributed axial protection components. On the other hand, the circumferentially distributed axial protection components help to evenly distribute axial force, provide more stable support, and improve the reliability of the rotor power system.

[0047] 5. This utility model increases the heat dissipation area and makes the heat dissipation efficiency higher by setting heat dissipation fins on the outer shell. Attached Figure Description

[0048] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0049] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0050] Figure 2 This utility model Figure 1 Sectional view;

[0051] Figure 3 This is a schematic diagram of the structure of the part of this utility model without the outer shell;

[0052] Figure 4 This utility model Figure 3 Enlarged schematic diagram at point I;

[0053] Figure 5 This is a schematic diagram of part of the structure of this utility model;

[0054] Figure 6 This is a top view of the axial magnetic levitation bearing of this utility model;

[0055] Figure 7 This utility model Figure 1 Sectional view along line AA;

[0056] Figure 8 This is a cross-sectional view of Embodiment 1 of the present invention;

[0057] Figure 9 This is a cross-sectional view of another embodiment 1 of the present invention.

[0058] Figure label:

[0059] 1-Drive motor, 101-Stator, 102-Upper rotor, 103-Lower rotor, 2-Central shaft, 3-Rotor, 4-Axial magnetic levitation bearing, 401-Iron core, 402-Coil, 5-First radial mechanical limit bearing mechanism, 501-Radial mechanical bearing, 502-Guide rail,

[0060] 503-Bearing support, 6-Second radial mechanical limit bearing mechanism, 7-Limiting plate, 8-Mounting plate, 9-Upper axial protection assembly,

[0061] 10 - Lower axial protection component, 11 - Housing, 1101 - Heat dissipation fins, 1102 - Connecting part. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0063] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0064] The following is combined with Figure 1-9 The figures provide a detailed description of this utility model.

[0065] Example 1

[0066] A mid-mounted magnetic levitation propulsion system includes a drive system.

[0067] The drive system includes a rotating assembly and at least one stator 101. The rotating assembly includes a central shaft 2 and at least one rotor. The rotor and stator 101 constitute a drive motor 1. The rotor is connected to the central shaft 2. One of the rotors is provided with an axial magnetic levitation bearing 4 on the side away from the stator 101.

[0068] A radial mechanical limiting bearing mechanism is slidably mounted on the central shaft 2. The radial mechanical limiting bearing mechanism is located above and / or below the drive motor 1 to ensure the radial stability of the central shaft 2 during rotation.

[0069] In this embodiment, as Figure 8 As shown, there is one rotor and one stator 101, and the rotor is located above or below the stator 101.

[0070] In this embodiment, only one axial magnetic levitation bearing 4 is used, simplifying the structure of the power system and reducing its overall mass. Finally, the radial bearing protection mechanism is a mechanical protection mechanism, which significantly simplifies the power system structure compared to existing radial protection structures using magnetic levitation support, resulting in a more compact power system. The single-sided axial magnetic levitation bearing 4 and the radial mechanical limiting bearing mechanism work together to reduce the number of suspended components, thereby significantly reducing the weight and axial length of the power system. Furthermore, the reduced number of suspended components correspondingly reduces the difficulty of controlling this power system.

[0071] In this embodiment, as Figure 9 As shown, rotors can be provided above and below the stator 101, namely the upper rotor 102 and the lower rotor 103.

[0072] Example 2

[0073] The difference between this embodiment and Embodiment 1 is that, as Figures 2-5 , Figure 8 , Figure 9 As shown, the radial mechanical limiting bearing mechanism includes a radial mechanical bearing 501 and a sliding assembly.

[0074] The sliding assembly includes a guide rail 502 and a bearing support 503. The guide rail 502 and the bearing support 503 are slidably engaged. The guide rail 502 is disposed on the side of the central shaft 2. The radial mechanical bearing 501 is connected to the bearing support 503.

[0075] In this embodiment, two guide rails 502 are symmetrically arranged on the side of the central shaft 2. Each guide rail 502 is slidably provided with a bearing support 503. The bearing support 503 is provided with a slot, which is used to fix the inner ring of the radial mechanical bearing 501. When the central shaft 2 rotates, the guide rails 502, the bearing support 503 and the inner ring of the radial mechanical bearing 501 will rotate accordingly. In addition, the radial mechanical bearing 501 can move axially within 3mm above and below the equilibrium position relative to the central shaft 2, which can ensure smooth axial movement of the rotor.

[0076] Example 3

[0077] The difference between this embodiment and Embodiment 2 is that, as Figure 2 , Figure 8 and Figure 9 As shown, axial protection components are provided above and below the drive motor 1. The axial protection component provided above the drive motor 1 is the upper axial protection component 9, and the axial protection component provided below the drive motor 1 is the lower axial protection component 10. The upper and lower axial protection components help to protect the drive motor 1 at various stages of rotation and under extreme conditions.

[0078] In this embodiment, the axial protection component includes a support body and rolling elements. The rolling elements are bearings or rollers, and the rolling elements are rolled and embedded in the support body. The support body is fixed by bolts.

[0079] Example 4

[0080] The difference between this embodiment and embodiment 3 is that, as Figure 2 , Figure 8 and Figure 9 As shown, when the radial mechanical limiting bearing mechanism and the axial magnetic levitation bearing 4 are located on the same side of the drive motor 1, the radial mechanical limiting bearing mechanism is located between the axial magnetic levitation bearing 4 and the central shaft 2.

[0081] In this embodiment, the radial mechanical limiting bearing mechanism is disposed inside the axial magnetic levitation bearing 4, that is, the radial mechanical limiting bearing mechanism is located between the axial magnetic levitation bearing 4 and the central shaft 2. This arrangement further reduces the axial length of the power system, making the power system more compact.

[0082] Example 5

[0083] The difference between this embodiment and embodiment 4 is that, as Figure 2 , Figure 8 and Figure 9 As shown, the drive motor 1, the radial mechanical limit bearing mechanism, and the axial magnetic levitation bearing 4 are all located inside the housing 11 and are fixed and limited by the housing 11. The two ends of the central shaft 2 pass through the housing 11.

[0084] Taking the position of the drive motor 1 as a reference, when the radial mechanical limiting bearing mechanism and the axial magnetic levitation bearing 4 are located on the opposite side of the drive motor 1, a limiting plate 7 is provided inside the housing 11, the radial mechanical limiting bearing mechanism is connected to the limiting plate 7, and an mounting plate 8 is provided above or below the limiting plate 7.

[0085] In this embodiment, as Figure 7 As shown, the outer shell 11 is provided with a plurality of heat dissipation fins 1101. The heat dissipation fins 1101 are arranged along the four sides of the outer shell 11. The heat dissipation fins 1101 increase the heat dissipation area and make the heat dissipation efficiency higher.

[0086] In this embodiment, the outer casing 11 is also provided with a connecting part 1102 for fixing the power system to other bodies.

[0087] The inner wall of the outer casing 11 is provided with limiting grooves corresponding to each component. The limiting grooves limit the movement of each component of the power system. The limiting plate 7 has two functions: first, it connects to the outer ring of the corresponding radial mechanical bearing 501 to limit the movement of the corresponding mechanical bearing; second, the limiting plate 7 creates two cavities, upper and lower, inside the outer casing 11 located on both sides of the limiting plate 7.

[0088] In addition, the limiting plate 7 has through holes to connect the upper and lower cavities. These cavities provide heat dissipation space, which is beneficial for the heat dissipation of the drive motor 1. Sensors can be installed in the cavity to monitor the operation of the drive motor 1. Finally, the cavity also helps to reduce the weight of the device.

[0089] Example 6

[0090] The difference between this embodiment and embodiment 5 is that, as Figure 2 , Figure 8 and Figure 9 As shown, the axial magnetic levitation bearing 4 and the mounting plate 8 are located below and above the drive motor 1, respectively. The upper axial protection component 9 is located between the drive motor 1 and the mounting plate 8, and the lower axial protection component 10 is located between the drive motor 1 and the axial magnetic levitation bearing 4.

[0091] In this embodiment, as Figure 6 As shown, the axial magnetic levitation bearing 4 includes an iron core 401 and a coil 402. The iron core 401 is an E-type iron core 401, and the coil 402 is embedded in the groove of the E-type iron core 401 in a ring shape.

[0092] In this embodiment, the rotor is made of ferromagnetic material or a magnet is provided on the lower end face of the rotor to generate magnetic force in conjunction with the energized coil 402.

[0093] In this embodiment, the upper axial protection component 9 is installed at the lower end of the mounting plate 8. In this embodiment, the upper axial protection component 9 is evenly distributed circumferentially at the lower end of the mounting plate 8. This arrangement improves the axial load-bearing capacity of the axial protection component and extends its service life. On the other hand, the evenly distributed axial protection component helps to evenly distribute the axial force, provides more stable support, and improves the reliability of the power system. In addition, the lower axial protection component 10 is also evenly distributed on the outer ring end face of the iron core 401. Its function is the same as that of the upper axial protection component 9 evenly distributed circumferentially at the lower end of the mounting plate 8, and will not be described again here.

[0094] Example 7

[0095] The difference between this embodiment and embodiment 6 is that, as Figure 2 , Figure 5 , Figure 8 and Figure 9As shown, the drive motor 1 is provided with radial mechanical limiting bearing mechanisms on both the upper and lower sides. The radial mechanical limiting bearing mechanisms are a first radial mechanical limiting bearing mechanism 5 and a second radial mechanical limiting bearing mechanism 6, wherein the second radial mechanical limiting bearing mechanism 6 and the axial magnetic levitation bearing 4 are located on the same side of the drive motor 1, and the first radial mechanical limiting bearing mechanism 5 and the axial magnetic levitation bearing 4 are located on opposite sides of the drive motor 1.

[0096] In this embodiment, as Figure 2 , 8 As shown in Figure 9, the second radial mechanical limiting bearing mechanism 6 is located between the axial magnetic levitation bearing 4 and the central shaft 2. The outer ring of the radial mechanical bearing 501 of this radial mechanical limiting bearing mechanism is connected to the interior of the axial magnetic levitation bearing 4. When the central shaft 2 moves axially, the guide rail 502 and the central shaft 2 move relative to the bearing support 503 and the radial mechanical bearing 501. By setting the radial mechanical limiting bearing mechanism in the interior space of the axial magnetic levitation bearing 4, the axial length of the power system is further reduced, making the power system more compact.

[0097] Furthermore, the first radial mechanical limiting bearing mechanism 5 and the second radial mechanical limiting bearing mechanism 6 have the same structure, both including a radial mechanical bearing 501 and a sliding assembly. The connection relationship between the sliding assembly and the central shaft 2, as well as the connection relationship between the radial mechanical bearing 501 and the sliding component, have been explained and will not be repeated here. In addition, the first radial mechanical limiting bearing mechanism 5 is located on the upper side of the upper rotor 102. Therefore, in this utility model, the final structure consists of a single-sided axial magnetic levitation bearing 4, a double-sided axial protection assembly, and a double-sided radial mechanical limiting bearing mechanism, which reduces weight and length. Combined with the second radial mechanical limiting bearing mechanism 6 located inside the space between the axial magnetic levitation bearing 4 and the central shaft 2, the axial length of the rotor 3 power system is further reduced.

[0098] Example 8

[0099] The difference between this embodiment and embodiment 7 is that the drive motor 1 includes N+1 rotors and N stators 101, where N is a natural number ≥1. The N+1 rotors and N stators 101 constitute N double-sided motors. Taking the axis of the central shaft 2 as a reference, the rotor ring located at the uppermost end of the axis of the central shaft 2 is the upper rotor 102, the rotor located at the lowermost end of the axis of the central shaft 2 is the lower rotor 103, and the rotor located between the upper rotor 102 and the lower rotor 103 is the intermediate rotor (if it is a single double-sided motor, there is no intermediate rotor). The side of the lower rotor 103 away from the stator 101 is provided with an axial magnetic suspension bearing.

[0100] like Figure 2 and Figure 9As shown, when N equals 1, the drive system includes a stator 101, and the rotating assembly includes two rotors, namely an upper rotor 102 and a lower rotor 103, which are located on the upper and lower sides of the stator 101, respectively.

[0101] When N≥2, taking the axis of the central axis 2 as the reference, the rotor ring at the uppermost end of the axis of the central axis 2 is the upper rotor 102, the rotor at the lowermost end of the axis of the central axis is the lower rotor 103, and the rotor between the upper rotor 102 and the lower rotor 103 is the intermediate rotor.

[0102] In this embodiment, to improve motor efficiency and structural compactness, a double-sided motor is provided, that is, one motor stator 101 is matched with two rotors. The double-sided motor can increase the power density of the motor, so that higher power output can be obtained in a limited space, providing a basis for high-speed rotation of the drive center shaft. In addition, the compact structure of the double-sided motor reduces the complexity of the transmission mechanism and improves space utilization and power transmission efficiency. To further improve lift, multiple double-sided motors can be provided, and axial magnetic levitation bearings 4 are provided in conjunction with the rotors at the top or bottom of the drive motor 1. High-efficiency, stable and reliable operation can be achieved by controlling the levitation force of the axial magnetic levitation bearings 4 at different positions.

[0103] Example 9

[0104] A rotor system, including the mid-drive magnetic levitation propulsion system described in any one of embodiments 1-8, such as... Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 7 As shown, the upper and / or lower ends of the central shaft 2 are provided with rotors 3, thereby forming a rotor system. In this embodiment, a single-layer rotor or a double-layer rotor can be provided to adapt to different working scenarios.

[0105] In this embodiment, the central shaft 2 includes a spline shaft and a spline sleeve. The upper rotor 102 and / or the lower rotor 103 are respectively connected to the upper part and / or the lower part of the spline shaft. The spline sleeve is connected to both ends of the spline shaft. The guide rail 502 is provided on the side of the spline sleeve. The rotor 3 is installed at the two ends of the spline sleeve away from the stator 101 and the rotor 3 is limited by the pressure cap.

[0106] The working principle of this utility model:

[0107] The centrally located disc motor drives the central shaft 2 to rotate, thereby driving the rotors 3 at both ends of the central shaft 2 to rotate and increase lift. During the operation of the motor, the axial magnetic levitation bearing 4 transmits thrust through non-contact, achieving efficient, low-friction, and contactless operation. This reduces energy consumption and heat generation in the rotor 3 power system during high-speed operation. The radial mechanical limit bearing mechanism ensures the radial stability of the central shaft 2, and the rotor can move axially within 3mm above and below the balance position. The guide rail slider mechanism ensures smooth axial movement of the rotor.

[0108] Example 10

[0109] A rotorcraft comprising the rotor system described in Example 9.

[0110] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mid-mounted magnetic levitation propulsion system, characterized in that, Including the drive system, The drive system includes a rotating assembly and at least one stator (101). The rotating assembly includes a central shaft (2) and at least one rotor. The rotor and the stator (101) constitute a drive motor (1). The rotor is connected to the central shaft (2), and one of the rotors is provided with an axial magnetic levitation bearing (4) on the side away from the stator (101). A radial mechanical limiting bearing mechanism is provided on the central shaft (2), and the radial mechanical limiting bearing mechanism is located above and / or below the drive motor (1).

2. The driving middle-mounted magnetic levitation power system according to claim 1, characterized in that: The radial mechanical limiting bearing mechanism includes a radial mechanical bearing (501) and a sliding assembly. The sliding assembly includes a guide rail (502) and a bearing support (503). The guide rail (502) and the bearing support (503) are slidably engaged. The guide rail (502) is disposed on the side of the central shaft (2). The radial mechanical bearing (501) is connected to the bearing support (503).

3. The driving middle-mounted magnetic levitation power system according to claim 1 or 2, characterized in that: An axial protection component is provided above and / or below the drive motor (1). The axial protection component provided above the drive motor (1) is an upper axial protection component (9), and the axial protection component provided below the drive motor (1) is a lower axial protection component (10).

4. The driving middle-mounted magnetic levitation power system according to claim 1 or 2, characterized in that: When the radial mechanical limiting bearing mechanism and the axial magnetic levitation bearing (4) are located on the same side of the drive motor (1), the radial mechanical limiting bearing mechanism is located between the axial magnetic levitation bearing (4) and the central shaft (2).

5. The drive middle-mounted magnetic levitation power system according to claim 3, characterized in that: The drive motor (1), radial mechanical limit bearing mechanism, and axial magnetic levitation bearing (4) are all located inside the housing (11) and are fixed and limited by the housing (11). The two ends of the central shaft (2) pass through the housing (11).

6. A drive central magnetically levitated power system according to claim 5, characterized in that: Based on the position of the drive motor (1), when the radial mechanical limit bearing mechanism and the axial magnetic levitation bearing (4) are located on the opposite side of the drive motor (1), a limit plate (7) is provided inside the outer shell (11), the radial mechanical limit bearing mechanism is connected to the limit plate (7), and an mounting plate (8) is provided above or below the limit plate (7).

7. A drive central magnetically suspended power system according to claim 6, characterized in that: When the axial magnetic levitation bearing (4) and the mounting plate (8) are located below and above the drive motor (1) respectively, the upper axial protection component (9) is located between the drive motor (1) and the mounting plate (8), and the lower axial protection component (10) is located between the drive motor (1) and the axial magnetic levitation bearing (4). When the axial magnetic bearing (4) and the mounting plate (8) are located above and below the drive motor (1) respectively, the upper axial protection component (9) is located between the drive motor (1) and the axial magnetic bearing (4), and the lower axial protection component (10) is located between the drive motor (1) and the mounting plate (8).

8. The drive-mid-mounted magnetic levitation power system according to claim 3, characterized in that: The axial magnetic levitation bearing (4) includes an iron core (401) and a coil (402). The coil (402) is embedded in the iron core (401). The iron core (401) is provided with the upper axial protection component (9) or the lower axial protection component (10) on the end face near the drive motor (1).

9. The driving middle-mounted magnetic levitation power system according to claim 1 or 2, characterized in that: The drive motor (1) is provided with radial mechanical limiting bearing mechanisms above and below it. The radial mechanical limiting bearing mechanisms are a first radial mechanical limiting bearing mechanism (5) and a second radial mechanical limiting bearing mechanism (6). The second radial mechanical limiting bearing mechanism (6) and the axial magnetic levitation bearing (4) are located on the same side of the drive motor (1), and the first radial mechanical limiting bearing mechanism (5) and the axial magnetic levitation bearing (4) are located on opposite sides of the drive motor (1).

10. The drive middle-mounted magnetic levitation power system according to claim 1 or 2, characterized in that: The drive motor (1) includes N stators (101) and N+1 rotors, where N≥1 and N is a natural number; When N=1, the drive motor (1) includes a stator (101) and two rotors, namely an upper rotor (102) and a lower rotor (103), which are located on the upper and lower sides of the stator (101), respectively. When N≥2, taking the axis of the central axis (2) as the reference, the rotor ring at the uppermost end of the axis of the central axis (2) is the upper rotor (102), the rotor at the lowermost end of the axis of the central axis (2) is the lower rotor (103), and the rotor between the upper rotor (102) and the lower rotor (103) is the middle rotor.

11. A rotor system characterized by: The drive-center magnetic levitation power system according to any one of claims 1-10 is provided with a rotor (3) at the upper end and / or lower end of the central shaft (2).

12. A rotary wing aircraft characterized by, Including the rotor system as described in claim 11.

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