Magnetic suspension rotary propelling device suitable for moon-based casting

Abstract

The invention relates to the technical field of magnetic suspension and electromagnetic propulsion, and discloses a magnetic suspension rotary propulsion device suitable for moon-based casting. The device comprises a base, a suspension rotor, a propulsion motor, a cantilever, a bearing, a plurality of suspension modules, an inter-segment electrical switching assembly and a supporting mechanism, the supporting mechanism is of an annular structure, the base is arranged in the annular structure, and the plurality of suspension modules are arranged on the supporting mechanism. The suspension modules are connected through the inter-segment electrical switching assembly, the cantilever is connected with the bearing to achieve rotation, the suspension rotor is arranged at one end or two ends of the cantilever, the propulsion motor comprises a motor rotor and a motor stator, the motor rotor is arranged at two ends of the cantilever, and the motor stator is arranged at one end or two ends of the cantilever. The motor stator is arranged on the base, and the return device mounting mechanism is arranged at one end of the cantilever. Therefore, the lunar surface return device can be accelerated to the speed not lower than 2500m / s, and the casting requirement of the return device is met.

Description

Technical Field

[0001] The present invention relates to the field of magnetic levitation technology and electromagnetic propulsion technology, and in particular to a magnetic levitation rotary propulsion device suitable for moon-based ejection. Background Art

[0002] The International Lunar Research Station is one of the first international large-scale scientific programs and large-scale scientific engineering cultivation projects in my country, among which the development and utilization of lunar resources is one of the main research directions of the International Lunar Research Station. In order to transport lunar development resources back to Earth in a repeatable, low-cost and high-frequency manner, it is necessary to design a corresponding ejection plan in combination with the typical characteristics of the lunar surface environmental conditions (high vacuum, high and low temperature, and low gravity). The magnetic levitation rotary propulsion device mainly uses a rotating motor device and an electric suspension device to provide ultra-high-speed propulsion and stable suspension functions for the return of lunar resources. In this environment, the magnetic levitation rotary propulsion device using magnetic levitation and electromagnetic propulsion technology has natural advantages such as no air resistance, small scale of propulsion device vacuum and refrigeration equipment, and low escape velocity. In addition, in order to release technical risks as much as possible, the magnetic levitation rotary propulsion device for lunar-based ejection can be adaptively modified on the surface of the earth, and a ground principle demonstration and verification device can be developed and tested.

[0003] The prior art proposes a rotary projectile solution based on a conventional rotary motor, in which a return device is accelerated by a conventional rotary motor, and the projectile action is completed after the return device reaches a specified speed.

[0004] However, the main disadvantage of the existing rotary projectile scheme is that the rotary projectile based on the conventional rotary motor is essentially an indirect drive, that is, the electromagnetic torque of the motor is transmitted to the swing arm through the bearing and then to the return device. When the return device reaches the projection speed, the stress concentration of the mechanical interface between the bearing and the swing arm can easily cause serious structural deformation or even damage, resulting in projectile failure. Summary of the invention

[0005] The present invention provides a magnetic suspension rotary propulsion device suitable for moon-based ejection, which can solve the technical problems in the prior art.

[0006] The present invention provides a magnetic levitation rotary propulsion device suitable for lunar-based ejection, wherein the device comprises a base, a suspension mover, a propulsion motor, a cantilever, a bearing, a suspension module, an inter-segment electrical adapter assembly and a support mechanism, wherein the support mechanism is an annular structure, the base is arranged in the annular structure, a plurality of the suspension modules are arranged on the support mechanism, a plurality of the suspension modules are connected through the inter-segment electrical adapter assembly, the cantilever is connected to the bearing to realize rotation, the suspension mover is arranged at one end or both ends of the cantilever, the propulsion motor comprises a motor mover and a motor stator, the motor mover is arranged at both ends of the cantilever, the motor stator is arranged on the base, and a return device mounting mechanism is arranged at one end of the cantilever.

[0007] Preferably, the propulsion motor is a superconducting synchronous motor or a conventional synchronous motor.

[0008] Preferably, the motor stator comprises a multi-phase winding, and the shape of the motor stator is a segmented circular arc shape or a continuous circular arc shape.

[0009] Preferably, the motor mover comprises a magnetic steel array.

[0010] Preferably, the magnetic steel array is a Halbach array or an array with alternating N poles and S poles.

[0011] Preferably, the magnetic steel array comprises magnetic steel, a magnetic steel mounting substrate and a cover plate, the magnetic steel is arranged on the magnetic steel mounting substrate, the cover plate is arranged on the magnetic steel, and the magnetic steel array is fixed to the cantilever by a bolt assembly.

[0012] Preferably, the suspension module comprises a suspension module substrate and a suspension module non-magnetic metal plate, and the suspension module non-magnetic metal plate is arranged on the suspension module substrate.

[0013] Preferably, the inter-segment electrical adapter assembly comprises an adapter assembly non-magnetic metal plate and an adapter assembly substrate, the adapter assembly non-magnetic metal plate is arranged on the adapter assembly substrate, and the suspension module is fixed to the inter-segment electrical adapter assembly by mounting bolts.

[0014] Preferably, the motor stator further includes an outer Dewar side plate, an outer Dewar cover plate and a motor mounting base.

[0015] Through the above technical solution, using magnetic levitation technology and electromagnetic propulsion technology, the lunar return device can be accelerated to a speed of no less than 2500m / s, meeting the ejection requirements of the return device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a magnetic suspension rotary propulsion device suitable for moon-based ejection according to an embodiment of the present invention is shown;

[0018] Figure 2 A schematic diagram of the installation of a motor mover / suspension mover and a swing arm according to an embodiment of the present invention is shown;

[0019] Figure 3 A schematic diagram of the installation of a suspension module and a switching assembly according to an embodiment of the present invention is shown;

[0020] Figure 4 A schematic diagram of the structure of a motor stator coil according to an embodiment of the present invention is shown;

[0021] Figure 5 A schematic structural diagram of a stator coil winding machine mold according to an embodiment of the present invention is shown;

[0022] Figure 6 A schematic diagram of a motor stator including a sealed external dewar according to an embodiment of the present invention is shown.

[0023] Description of Reference Numerals

[0024] 1. Return device installation mechanism, 2. Suspension mover, 3. Motor mover, 4. Motor stator, 5. Swing arm, 6. Bearing, 7. Suspension module, 8. Inter-segment electrical transfer assembly, 9. Support mechanism, 22. Magnet, 23. Magnet mounting base, 24. Bolt assembly, 31. Suspension module base, 32. Suspension module non-magnetic metal plate, 33. Transfer assembly non-magnetic metal plate, 34. Transfer assembly base, 35. Mounting bolts, 41. Stator coil, 42. Electrical connecting wire between coils, 410. Coil body, 412, Coil mold, 51. External Dewar side plate, 52. External Dewar cover plate, 53. Motor mounting base. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0028] Figure 1 A schematic structural diagram of a magnetic levitation rotary propulsion device suitable for lunar-based ejection according to an embodiment of the present invention is shown.

[0029] like Figure 1As shown, an embodiment of the present invention provides a magnetic levitation rotary propulsion device suitable for lunar-based ejection, wherein the device includes a base, a suspension mover 2, a propulsion motor, a cantilever 5, a bearing 6, a suspension module 7, an inter-segment electrical adapter assembly 8 and a support mechanism 9, wherein the support mechanism 9 is an annular structure, the base is arranged in the annular structure, a plurality of the suspension modules 7 are arranged on the support mechanism 9, a plurality of the suspension modules 7 are connected through the inter-segment electrical adapter assembly 8, the cantilever 6 is connected to the bearing 7 to realize rotation, the suspension mover 2 is arranged at one end or both ends of the cantilever 6, the propulsion motor includes a motor mover 3 and a motor stator 4, the motor mover 3 is arranged at both ends of the cantilever 6, the motor stator 4 is arranged on the base, and the return device mounting mechanism 1 is arranged at one end of the cantilever 6.

[0030] Among them, the device mounting mechanism 1 is used to install the return device, the suspension mover 2 and the suspension module 7 are used to provide suspension function for the return device, the motor mover 3 and the motor stator 4 are used to provide propulsion function, the cantilever 6 is used to provide a mounting interface for the motor mover and the suspension mover 2 and for ejecting the return device, and the bearing is used to provide rotational motion constraint for the swing arm.

[0031] Through the above technical solution, using magnetic levitation technology and electromagnetic propulsion technology, the lunar return device can be accelerated to a speed of no less than 2500m / s, meeting the ejection requirements of the return device.

[0032] In the present invention, the order in which the electronic movers and the suspension movers are arranged in the radial direction of the cantilever can be determined according to actual needs, and the present invention is not limited to this.

[0033] For example, the bearing may be a magnetic bearing or a mechanical bearing. In the present invention, the rotating shaft only serves as a constraint device for the rotational motion, rather than a force transmission device for the electromagnetic torque.

[0034] According to an embodiment of the present invention, the propulsion motor is a superconducting synchronous motor or a conventional synchronous motor.

[0035] According to an embodiment of the present invention, the motor stator 4 includes a multi-phase winding, and the shape of the motor stator is a segmented circular arc shape or a continuous circular arc shape.

[0036] For example, the multi-phase winding may be a multi-phase winding formed by a stator coil.

[0037] According to an embodiment of the present invention, the motor mover 3 includes a magnetic steel array.

[0038] According to an embodiment of the present invention, the magnetic steel array is a Halbach array or an array with alternating N poles and S poles.

[0039] According to an embodiment of the present invention, Figure 2 As shown, the magnetic steel array includes a magnetic steel 22, a magnetic steel mounting substrate 23 and a cover plate, the magnetic steel 22 is arranged on the magnetic steel mounting substrate 23, the cover plate is arranged on the magnetic steel 22, and the magnetic steel array is fixed to the cantilever 6 by a bolt assembly 24.

[0040] According to an embodiment of the present invention, Figure 3 As shown, the suspension module 7 includes a suspension module substrate 31 and a suspension module non-magnetic metal plate 32 , and the suspension module non-magnetic metal plate 32 is arranged on the suspension module substrate 31 .

[0041] According to an embodiment of the present invention, Figure 3 As shown, the inter-segment electrical adapter assembly 8 includes an adapter assembly non-magnetic metal plate 33 and an adapter assembly substrate 34 , the adapter assembly non-magnetic metal plate 33 is arranged on the adapter assembly substrate 34 , and the suspension module 7 is fixed to the inter-segment electrical adapter assembly 8 by installing bolts 35 .

[0042] According to an embodiment of the present invention, Figure 6 As shown, the motor stator 4 may further include an outer Dewar side plate 51 , an outer Dewar cover plate 52 and a motor mounting base 53 .

[0043] That is, in order to apply the propulsion device described in the present invention to a ground environment, the motor stator may further include an external dewar, through which a low vacuum environment is provided for the stator coil.

[0044] In other words, when the motor uses a superconducting motor, there is no need to use an external cryostat to create a vacuum environment in the lunar environment, but an external cryostat (with the lowest possible conductivity) is required to create a low vacuum environment in the ground environment, such as Figure 6 shown.

[0045] The following describes a magnetic levitation rotary propulsion device suitable for lunar-based ejection according to the present invention with reference to examples.

[0046] The motor rotor and the motor stator constitute the propulsion motor of the entire magnetic levitation rotary propulsion device. In order to suppress thrust fluctuations and improve thrust quality, the motor type is preferably a superconducting / normally conductive synchronous motor. The motor stator can be composed of a stator coil 41 (such as Figure 4 The stator coils 41 are connected by inter-coil electrical connecting wires 42. Each stator coil may be composed of a coil body 410 and a coil mold 412, as shown in FIG. Figure 5The motor mover can be packaged by a magnetic steel array and peripheral structural parts. The magnetic steel array can be designed as a Halbach array or a conventional N-pole and S-pole staggered form according to performance requirements. The motor mover / suspension mover and the swing arm installation diagram is shown in Figure 2 shown.

[0047] The suspension mechanism of the whole device is composed of the suspension mover, suspension module and inter-segment electrical adapter assembly. The composition of the suspension mover is similar to that of the motor mover. The suspension module can be composed of non-magnetic metal plates and structural parts. Considering the processing restrictions and space layout, the suspension module can be composed of multiple arc segments, and in order to ensure the stability of the suspension force, inter-segment electrical adapter assemblies can be used between different arc segments. The inter-segment electrical adapter assembly can maintain the smallest possible contact resistance with the non-magnetic metal plate of the adjacent suspension module through the crimping process, plating process and grinding process. The installation of the suspension module and the adapter assembly is as follows: Figure 3 shown.

[0048] Under the action of positioning and control signals, the converter passes symmetrical multi-phase (the number of phases can be designed according to actual needs) current into the motor stator. The motor rotor generates electromagnetic force and generates electromagnetic torque under the constraints of the swing arm and bearing, thereby driving the return device to produce rotational motion.

[0049] When the swing arm rotates, the suspension rotor and the suspension module generate induced eddy currents, thereby generating a passive suspension force that does not require active control, resisting the vertical deformation of the swing arm and the corresponding device above it under the action of gravity, and providing a stable horizontal plane for the ejection of the return mechanism, providing a good foundation for the accurate control of the ejection time and position and the accurate prediction of the landing point from the source.

[0050] It can be seen from the above embodiments that the magnetic suspension rotary propulsion device suitable for lunar-based ejection according to the present invention has at least the following advantages:

[0051] (1) Under the electromagnetic force of the motor rotor, the swing arm generates a low-fluctuation, high-quality electromagnetic torque that is directly used for ejection of the return device, and the electromagnetic torque does not need to be transmitted through the swing arm.

[0052] (2) When the operating speed reaches the design value of the levitation speed, the return device generates a levitation force and overcomes the deformation of the swing arm, levitation rotor and motor rotor under the action of gravity to ensure the horizontality during the ejection process.

[0053] (3) When the suspended rotor passes through the inter-segment electrical transfer device, the suspension force fluctuates slightly, and has little impact on the ejection and control of the return device.

[0054] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0055] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0056] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetically suspended rotary propulsion device suitable for lunar-based ejection, characterized in that: The device comprises a base, a suspension rotor (2), a propulsion motor, a cantilever (5), a bearing (6), a suspension module (7), an inter-segment electrical adapter assembly (8) and a support mechanism (9), wherein the support mechanism (9) is an annular structure, the base is arranged in the annular structure, a plurality of the suspension modules (7) are arranged on the support mechanism (9), the plurality of the suspension modules (7) are connected via the inter-segment electrical adapter assembly (8), the cantilever (6) is connected to the bearing (7) to achieve rotation, the suspension rotor (2) is arranged at one end or both ends of the cantilever (6), the propulsion motor comprises a motor rotor (3) and a motor stator (4), the motor rotor (3) is arranged at both ends of the cantilever (6), the motor stator (4) is arranged on the base, and a return device mounting mechanism (1) is arranged at one end of the cantilever (6).

2. The device according to claim 1, characterized in that The propulsion motor is a superconducting synchronous motor or a conventional synchronous motor.

3. The device according to claim 1, characterized in that The motor stator (4) comprises a multi-phase winding, and the shape of the motor stator is a segmented circular arc shape or a continuous circular arc shape.

4. The device according to claim 3, characterized in that The motor mover (3) comprises a magnetic steel array.

5. The device according to claim 4, characterized in that The magnetic steel array is a Halbach array or an array with alternating N poles and S poles.

6. The device according to claim 5, characterized in that The magnetic steel array comprises a magnetic steel (22), a magnetic steel mounting substrate (23) and a cover plate, wherein the magnetic steel (22) is arranged on the magnetic steel mounting substrate (23), the cover plate is arranged on the magnetic steel (22), and the magnetic steel array is fixed to the cantilever (6) via a bolt assembly (24).

7. The device according to claim 6, characterized in that The suspension module (7) comprises a suspension module substrate (31) and a suspension module non-magnetic metal plate (32), wherein the suspension module non-magnetic metal plate (32) is arranged on the suspension module substrate (31).

8. The device according to claim 7, characterized in that The inter-segment electrical adapter assembly (8) comprises an adapter assembly non-magnetic metal plate (33) and an adapter assembly substrate (34); the adapter assembly non-magnetic metal plate (33) is arranged on the adapter assembly substrate (34); and the suspension module (7) is fixed to the inter-segment electrical adapter assembly (8) by means of mounting bolts (35).

9. The device according to claim 8, characterized in that The motor stator (4) further comprises an outer Dewar side plate (51), an outer Dewar cover plate (52) and a motor mounting base (53).

Images