High-temperature superconducting magnetic suspension power rotor system

Abstract

The utility model discloses a high-temperature superconducting magnetic suspension power rotor system, and belongs to the technical field of rotor aircrafts. The rotor system solves the problems that in the prior art, a rotor system is compact in structure, and internal heat cannot be dissipated. The impeller comprises a stator ring and a rotor ring, wherein a plurality of paddles are arranged on the rotor ring; a gap is formed between the stator ring and the rotor ring and forms a cooling duct; a high-temperature superconducting magnetic levitation module and a driving module are arranged between the stator ring and the rotor ring; the high-temperature superconducting magnetic suspension module is used for maintaining axial and radial gaps between the stator ring and the rotor ring; the driving module is used for driving the rotor ring to rotate relative to the stator ring. According to the utility model, the high-temperature superconducting magnetic suspension module and the driving module maintain the axial gap together, and meanwhile, the high-temperature superconducting strong pinning effect is utilized to control the radial gap, so that a radial suspension mechanism is omitted, the structure between the stator ring and the rotor ring is simple, enough space is provided for air flow, and the heat dissipation effect is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotorcraft, and specifically to a high-temperature superconducting magnetic levitation powered rotor system. Background Art

[0002] Magnetic levitation relies on electromagnetic force between objects rather than mechanical contact force to balance gravity and achieve contactless coupling between objects, fundamentally eliminating various mechanical wear and mechanical friction resistance. In recent years, with the continuous development of magnetic levitation technology, applying magnetic levitation technology to rotorcraft has become a new design idea for rotorcraft.

[0003] The prior art provides a shaftless electromagnetic rotor with an outer edge support, comprising a circular lower rotor cover and an upper rotor cover; a cavity for placing a rotor ring is reserved between the lower rotor cover and the upper rotor cover; the upper rotor cover and the lower rotor cover are detachably connected as a whole; the rotor ring is made of metal, a plurality of propeller blades are installed on the inner side of the rotor ring, the outer side of the rotor ring is grooved and two permanent magnets are installed in the grooves, and the two permanent magnets are arranged on both sides of the rotor ring opposite to each other; a plurality of armature windings are provided. The circular array is arranged around the rotor ring and installed in the lower rotor cover. The armature winding is connected to an external DC power supply, and the coil of the armature winding faces the center of the circular ring. A vertical base adjustment magnetic induction coil is provided directly below the rotor ring, and the vertical base adjustment magnetic induction coil is installed in the lower rotor cover. A vertical base magnetic induction coil is provided directly above the rotor ring, and the vertical base magnetic induction coil is installed in the upper rotor cover. The vertical base adjustment magnetic induction coil and the vertical base magnetic induction coil are used to provide magnetic levitation force for the rotating rotor ring. However, the device is an encapsulated design in which the outer orbital ring is nested in the rotor ring, and the structure is compact. In addition, the device is driven to rotate by an internal electromagnet, and the heat generated inside cannot be dissipated in time, resulting in demagnetization of the permanent magnet and reducing the working efficiency of the disc motor. Utility Model Content

[0004] Aiming at the problem that the rotor system in the prior art has a compact structure and the internal heat cannot be dissipated, the utility model provides a high-temperature superconducting magnetic levitation power rotor system.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A high-temperature superconducting magnetic suspension power rotor system comprises a stator ring and a rotor ring, wherein the rotor ring is provided with a plurality of blades;

[0007] A gap is provided between the stator ring and the rotor ring, and the gap forms a cooling duct;

[0008] A high-temperature superconducting magnetic suspension module and a driving module are arranged between the stator ring and the rotor ring; the high-temperature superconducting magnetic suspension module is used to maintain the axial and radial gaps between the stator ring and the rotor ring; the driving module is used to drive the rotor ring to rotate relative to the stator ring.

[0009] After adopting this technical solution, the axial gap is maintained by the high-temperature superconducting magnetic levitation module and the driving module, and the radial gap is controlled by the strong pinning effect of the high-temperature superconductor. The radial suspension mechanism is omitted, making the structure between the stator ring and the rotor ring simple, ensuring that the size of the cooling duct between the stator ring and the rotor ring is large enough, providing sufficient space for air flow, and effectively improving the heat dissipation effect.

[0010] Preferably, the stator ring is provided with an annular groove, and the rotor ring is arranged in the annular groove.

[0011] After adopting this technical solution, a ring groove is provided on the stator ring, and the rotor ring is arranged inside the stator ring to form a stator-rotor structure.

[0012] Preferably, a ring groove is provided on one side of the rotor ring, blades are provided on the other side, and the stator ring is arranged in the ring groove.

[0013] After adopting this technical solution, a ring groove is provided on the rotor ring, and the stator ring is arranged inside the rotor ring to form a rotor-stator structure.

[0014] Preferably, the high-temperature superconducting magnetic levitation module is arranged at the lower part of the rotor ring, and the driving module is arranged at the upper part of the rotor ring.

[0015] After adopting this technical solution, by setting the high-temperature superconducting magnetic levitation module at the lower part of the rotor ring and the driving permanent magnet at the upper part of the rotor ring, the magnetic levitation rotorcraft can achieve frictionless starting, which means that the rotorcraft does not require physical contact between the rotor and the fuselage during takeoff and landing, reducing wear and energy loss.

[0016] Preferably, the high-temperature superconducting magnetic levitation module includes a dewar or a suspended permanent magnet arranged on the stator ring, the rotor ring is provided with a suspended permanent magnet cooperating with the dewar or a dewar cooperating with the suspended permanent magnet, a superconducting magnet is arranged in the dewar, and the dewar is also connected to a low-temperature liquid nitrogen container, the driving module includes a driving permanent magnet or a driving coil arranged on the stator ring, and the rotor ring is provided with a driving coil cooperating with the driving permanent magnet or a driving permanent magnet cooperating with the driving coil.

[0017] Preferably, a plurality of anti-collision balls are evenly distributed in an annular direction on the upper top wall and the lower bottom wall of the annular groove.

[0018] After adopting this technical solution, high-temperature superconductors are used to achieve axial suspension. The strong pinning effect of high-temperature superconductors can be used to avoid radial displacement of the rotor ring. Therefore, radial anti-collision balls can be eliminated and the weight of the rotor can be reduced.

[0019] Preferably, there is no central axis structure between the plurality of blades.

[0020] After adopting this technical solution, the lift received by the blades when rotating is distributed in an "inward-concave" shape, and the blade support point is the outer edge. Therefore, although the lift provided by the middle part of the blade is less, the load on the outer edge support position is greater due to its distance from the outer edge support position and the larger lever arm. Setting a hollow blade structure can greatly improve the rotor support strength at the expense of extremely limited lift. At the same time, since there is no need to consider the design of the blade center connector, it is beneficial to reduce weight. The outer edge of the blade allows the blade to be designed with larger geometric dimensions, further increasing the lift.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0022] 1. The utility model maintains the axial gap by the high-temperature superconducting magnetic suspension module and the driving module, and controls the radial gap by the strong pinning effect of the high-temperature superconductor, omitting the radial suspension mechanism, making the structure between the stator ring and the rotor ring simple, ensuring that the size of the cooling duct between the stator ring and the rotor ring is large enough, providing sufficient space for air flow, and effectively improving the heat dissipation effect.

[0023] 2. The lift received by the blades of the utility model when rotating is distributed in an "inwardly concave" shape, and the blade support point is the outer edge. Therefore, although the lift provided by the middle part of the blade is less, the load on the outer edge support position is greater due to the distance from the outer edge support position and the larger force arm. Setting a hollow blade structure can greatly improve the rotor support strength at the expense of extremely limited lift. At the same time, since there is no need to consider the design of the blade center connector, it is beneficial to reduce weight. The outer edge of the blade allows the blade to be designed with larger geometric dimensions, further increasing the lift.

[0024] 3. The utility model arranges the high-temperature superconducting magnetic levitation module at the lower part of the rotor ring and the driving permanent magnet at the upper part of the rotor ring so that the magnetic levitation rotorcraft can achieve frictionless starting, which means that the rotorcraft does not need physical contact between the rotor and the body during takeoff and landing, reducing wear and energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0026] Figure 1 This is a schematic diagram of the structure of the stator enclosing the rotor in the present utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the stator enclosing the rotor in the present utility model;

[0028] Figure 3It is a structural schematic diagram of the blade in the utility model;

[0029] Among them: 1-rotor ring, 2-driving coil, 3-driving permanent magnet, 4-anti-collision ball, 5-suspended permanent magnet, 6-Dewar, 7-cooling duct, 8-blade, 9-stator ring. DETAILED DESCRIPTION

[0030] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0031] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] Combine the following Figure 1-Figure 3 The utility model is described in detail.

[0033] Example 1

[0034] like Figure 1 As shown, a high-temperature superconducting magnetic levitation power rotor system includes a stator ring 9, wherein a ring groove is arranged inside the stator ring 9, a rotor ring 1 is arranged inside the ring groove, an opening is arranged on the ring groove, and the rotor ring 1 is connected to a plurality of blades 8 arranged outside the ring groove through the opening;

[0035] A gap is provided between the stator ring 9 and the rotor ring 1, and the gap forms a cooling duct 7. In this embodiment, the width of the cooling duct 7 is 10 mm.

[0036] A high-temperature superconducting magnetic suspension module and a driving module are respectively arranged between the top of the rotor ring 1 and the annular groove wall and between the bottom of the rotor ring 1 and the annular groove wall; the high-temperature superconducting magnetic suspension module is used to maintain the axial and radial gaps between the stator ring 9 and the rotor ring 1; the driving module is used to drive the rotor ring 1 to rotate relative to the stator ring 9;

[0037] In this embodiment, Figure 3 As shown, the blades 8 are all hollow structures, and six blades 8 are connected to the rotor ring 1. The centers of the six blades 8 are not connected, which reduces the weight of the rotor ring 1, provides more space for the blades 8, and increases the lift generated by the rotor ring 1. During operation, the rotor ring 1 is attracted by the electromagnetic force of the driving coil 2, driving the blades 8 fixed thereon to rotate and generate lift. The rotor ring 1 is made of non-ferromagnetic materials with good thermal conductivity to solve the heat dissipation problem and avoid interfering with the electromagnetic magnetic field.

[0038] In this embodiment, the high-temperature superconducting magnetic suspension module includes a dewar 6 arranged at the bottom of the ring groove, a superconducting magnet is arranged in the dewar 6, and the dewar 6 is also connected to a cryogenic liquid nitrogen container. The rotor ring 1 is provided with a suspended permanent magnet 5 that cooperates with the dewar 6. The cryogenic liquid nitrogen container can transport a cooling medium, such as liquid nitrogen, into the dewar 6 to make the superconducting magnet reach the required operating temperature. The cooling medium is transported between the cryogenic liquid nitrogen container and the dewar 6 through a transport system. The cryogenic liquid nitrogen container can be arranged on the stator ring 9 or on the frame around the rotor. In this embodiment, it is arranged on the stator ring 9.

[0039] In this embodiment, the suspended permanent magnet 5 is arranged according to the Halbach arrangement. There are 100 suspended permanent magnets 5. They are evenly distributed along the circumferential direction, and ferromagnetic materials are used to achieve magnetic isolation between permanent magnets, so that the magnetic field distribution meets the actual application requirements. There are 12 dewars 6, which are evenly distributed at intervals of 30° along the circumferential direction. Through the pinning effect between the superconducting magnet and the suspended permanent magnet 5, the autonomous control of the axial suspension and radial limit of the rotor is realized, and it has high self-stability. The radial width of the superconducting magnet is 30mm larger than that of the suspended permanent magnet 5 to ensure the stability of the lateral restoring force. The superconducting magnet is placed at a certain height below the suspended permanent magnet 5, which is defined as the field cooling position. The superconducting magnet is in a normal state, and the magnetic field generated by the suspended permanent magnet 5 can be freely penetrated and penetrated, and there will be no force performance. The superconducting magnet is cooled at the field cooling position until it enters the superconducting state, and the magnetic field passing through the inside of the superconducting magnet will be captured by the pinning center. The superconducting magnet will be displaced due to gravity, which will change the magnetic flux inside the superconducting magnet, thereby inducing current. Under the interaction of current and magnetic field, electromagnetic force will be generated, which will support the rotor ring 1 without contact, form a frictionless start, and reduce the heat generation between the systems. When the superconducting magnet is displaced axially, the magnetic flux will change inside the superconducting magnet. Due to Lenz's law, its movement will be hindered, so that it will return to the field-cooled position to ensure its stable suspension. When the rotor ring 1 is displaced radially, the transverse magnetic flux in the superconducting magnet changes. According to Lenz's law, an induced current is generated on the surface of the superconducting magnet. This induced current interacts with the magnetic field to generate a transverse Lorentz magnetic force, which is manifested as the transverse restoring force of the superconducting magnet.

[0040] In this embodiment, the driving module includes a driving permanent magnet 3 arranged on the upper surface of the rotor ring 1, and the ring groove is provided with a driving coil 2 that cooperates with the driving permanent magnet 3. The driving coil 2 is fixedly connected to the stator ring 9 to form the outer frame of the magnetic suspension rotor, which plays a role in structural support and protection of the rotor ring 1.

[0041] The operation process is:

[0042] like Figure 1 , 3As shown, during the startup phase, the superconducting magnet in the dewar 6 enters the superconducting state at the field-cooling position, interacts with the suspension permanent magnet 5, and generates a suspension force to support the rotor ring 1 to suspend. Then the drive coil 2 of the disc motor is energized to generate an electromagnetic field, which interacts with the drive permanent magnet 3 fixed to the upper surface of the rotor ring 1 to drive the rotor blades 8 to rotate at high speed. Through the pinning effect between the superconducting magnet and the suspension permanent magnet 5, the lateral movement of the rotor ring 1 is restricted, which plays a lateral limiting role. The entire system structure is simple and compact, and the system mass is reduced. The magnetic levitation rotor structure adopts the method of wrapping the rotor with the stator, which reduces the volume of the stator ring 9, and the magnet arrangement on the stator ring 9 is more compact, which can effectively reduce the mass of large magnetic levitation rotor aircraft.

[0043] Example 2

[0044] This embodiment is basically the same as the embodiment 1, except that: in this embodiment, a plurality of anti-collision balls 4 are evenly arranged in the annular direction on the upper top wall and the lower bottom wall of the annular groove. The upper and lower anti-collision balls 4 are evenly distributed along the circular ring of the driving coil 2 at a spacing of 30°. The anti-collision balls 4 are not completely embedded in the stator ring 9, and a 2mm exposure is retained. The anti-collision balls 4 can rotate freely in the stator ring 9, playing a contact support role.

[0045] Example 3

[0046] This embodiment is basically the same as embodiment 1 or 2, except that: Figure 2 As shown, a ring groove is provided on one side of the rotor ring 1, and a blade 8 is provided on the other side. The stator ring 9 is provided in the ring groove. By providing the ring groove on the rotor ring 1 and arranging the stator ring 9 in the rotor ring 1, a rotor-stator structure is formed. The dewar 6 is still provided on the stator ring 9.

[0047] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A high temperature superconducting magnetic levitation powered rotor system, characterized in that: It comprises a stator ring (9) and a rotor ring (1), wherein the rotor ring (1) is provided with a plurality of blades (8); A gap is provided between the stator ring (9) and the rotor ring (1), and the gap forms a cooling duct (7); A high-temperature superconducting magnetic suspension module and a driving module are arranged between the stator ring (9) and the rotor ring (1); the high-temperature superconducting magnetic suspension module is used to maintain the axial and radial gaps between the stator ring (9) and the rotor ring (1); and the driving module is used to drive the rotor ring (1) to rotate relative to the stator ring (9).

2. The high temperature superconducting magnetic levitation power rotor system according to claim 1, characterized in that: The stator ring (9) is provided with an annular groove, and the rotor ring (1) is arranged in the annular groove.

3. The high temperature superconducting magnetic levitation power rotor system according to claim 2, characterized in that: A ring groove is arranged on one side of the rotor ring (1), and blades (8) are arranged on the other side, and the stator ring (9) is arranged in the ring groove.

4. The high temperature superconducting magnetic levitation powered rotor system according to any one of claims 1 to 3, characterized in that: The high-temperature superconducting magnetic suspension module is arranged at the lower part of the rotor ring (1), and the driving module is arranged at the upper part of the rotor ring (1).

5. A high temperature superconducting magnetic levitation power rotor system according to claim 4, characterized in that: The high-temperature superconducting magnetic suspension module comprises a dewar (6) or a suspension permanent magnet (5) arranged on a stator ring (9); the rotor ring (1) is provided with a suspension permanent magnet (5) matched with the dewar (6) or a dewar (6) matched with the suspension permanent magnet (5); a superconducting magnet is arranged in the dewar (6); the dewar (6) is also connected to a low-temperature liquid nitrogen container; the drive module comprises a drive permanent magnet (3) or a drive coil (2) arranged on the stator ring (9); the rotor ring (1) is provided with a drive coil (2) matched with the drive permanent magnet (3) or a drive permanent magnet (3) matched with the drive coil (2).

6. The high temperature superconducting magnetic levitation power rotor system according to any one of claims 2-3, characterized in that: A plurality of anti-collision balls (4) are evenly distributed in an annular direction on the upper top wall and the lower bottom wall of the annular groove.

7. The high temperature superconducting magnetic levitation powered rotor system according to any one of claims 1 to 3, characterized in that: There is no central axis structure between the plurality of blades (8).

Images