A superconducting electric-electromagnetic hybrid maglev train

Abstract

The present invention discloses a superconducting electric-electromagnetic hybrid maglev train, which includes an L-shaped suspension frame and an "I"-shaped ground track, the upper end of the suspension frame is connected to the car body through an air spring; the suspension frame is arranged on both sides of the ground track, and a gap is set between the suspension frame and the ground track; a plurality of superconducting magnets are arranged at the lower end of the suspension frame; the upper and lower ends of the ground track are respectively provided with an "8"-shaped upper suspension coil and an "8"-shaped lower suspension coil, the lower end of the suspension frame is provided with an upper power generation coil and a lower power generation coil, the upper suspension coil and the lower suspension coil are electrically connected; a propulsion coil is arranged above the upper suspension coil. The advantages of the present invention include: large operating air gap, self-stability, good suspension guidance dynamic performance, better curve passing ability, higher superconducting magnet magnetic field utilization rate and lower track construction cost.

Description

Technical Field

[0001] The invention relates to the technical field of rail transportation, and in particular to a superconducting electric-electromagnetic hybrid maglev train. Background Art

[0002] As a new type of rail transit technology, magnetic levitation relies on the electromagnetic force between the vehicle body and the track rather than mechanical contact force to balance the weight of the vehicle body, which can fundamentally eliminate contact friction and wear; the use of linear motor traction drive and power generation can avoid the adhesion traction limit and pantograph current restriction problems faced by the wheel-rail system. This makes magnetic levitation one of the main directions for the development of higher-speed rail transit technology.

[0003] Electromagnetic suspension relies on the electromagnetic attraction between the on-board electromagnet and the magnetic track to make the vehicle body float above the track, and can be suspended statically. The typical feature of this suspension technology is that it must be actively controlled to stabilize the suspension, which results in a small suspension air gap (8-10mm) and high requirements for the smoothness of the line.

[0004] Electric maglev trains rely on the onboard superconducting magnets to generate induced currents when the magnetic lines of force cut through the track coils (or induction plates) when the train is moving. The interaction between the two generates magnetic lift, which increases with speed. When the train reaches a certain speed, the magnetic lift can balance gravity and the train body floats. However, existing electric maglev trains have high requirements for the magnetic field strength of onboard superconducting magnets, are difficult to shield the magnetic field, and have weak curve passing capabilities. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a superconducting electric-electromagnetic hybrid maglev train with the advantages of large operating air gap, good self-stability, high magnetic field utilization, good dynamic performance, flexible system structure, etc., and improves the train's curve passing ability, reduces the magnetic load of the on-board superconducting magnet and reduces the difficulty of magnetic shielding of the superconducting magnet.

[0006] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0007] Provided is a superconducting electric-electromagnetic hybrid maglev train, comprising an L-shaped suspension frame and an I-shaped ground track, wherein the upper end of the suspension frame is connected to a vehicle body through an air spring; the suspension frame is arranged on both sides of the ground track, and a gap is provided between the suspension frame and the ground track; a power generation coil and a plurality of superconducting magnets are provided at the lower end of the suspension frame; an "8"-shaped upper suspension coil and an "8"-shaped lower suspension coil are respectively provided at the upper and lower ends of the ground track, and a propulsion coil is provided inside the ground track.

[0008] The beneficial effects of the present invention are:

[0009] The train has a large running air gap and excellent self-stabilization performance. The present invention adopts superconducting magnets as on-board magnets and cross-connected zero flux coils as suspension coils, so the train has the characteristics of large running air gap and good self-stabilization. In addition, the ferromagnetic shielding material and the magnetic skeleton of the propulsion coil arranged in the ground track will attract the superconducting magnet, further improving the suspension force, guiding force and propulsion force of the train, so the superconducting electric-electromagnetic hybrid maglev train of the present invention has a large running air gap and excellent self-stabilization performance.

[0010] The train has a higher utilization rate of the superconducting magnet's magnetic field. Zero-flux suspension coils are arranged on the upper and lower sides of the superconducting magnet. During the operation of the train, the magnetic fields on the upper and lower sides of the superconducting magnet generate induced currents in the suspension coils. The currents interact with the superconducting magnets to generate electromagnetic forces, providing the train with greater suspension and guiding forces.

[0011] The train has excellent dynamic performance. Due to the geometric symmetry of the superconducting magnets, suspension coils and propulsion coils, the electromagnetic forces generated by the superconducting magnets on the left and right sides of the train are equal in magnitude and direction under any operating conditions, so there is no risk of yaw or roll.

[0012] The train has excellent curve passing ability and flexible system structure. Since the superconducting magnet and the suspension coil are both located at the lower part of the car body, the lateral displacement constraint is released, and a larger lateral displacement can be allowed when passing through a curve; and the lateral force of the present invention is larger and the centripetal force is more sufficient. The present invention effectively reduces the lateral length of the cross section of the track system, which is convenient for the flexible design of the line structure, especially reducing the tunnel section.

[0013] Superconducting magnets have low magnetic load requirements and low magnetic shielding difficulty. Since superconducting magnets are arranged continuously along the length of the train, their size is reduced and their number is increased, which reduces the maximum magnetic field of the magnets, thereby increasing the engineering current density of the superconducting magnets, better exerting the superconductivity of the material, and reducing the difficulty of magnetic shielding of the superconducting magnets.

[0014] The installation strength requirements of the superconducting magnet and the suspension coil are low. The size of the superconducting magnet is reduced, the magnetomotive force is reduced, and the attraction between the superconducting magnets is reduced. Therefore, the installation strength requirements of the superconducting magnet in the cryogenic container of the present invention are reduced. When the train does not deviate laterally, there is no lateral force between the superconducting magnet and the suspension coil, so the installation strength requirements of the suspension coil in the ground track are reduced.

[0015] The propulsion coil has a small excitation current and a strong magnetic field. The propulsion coil skeleton adopts a silicon steel sheet structure, which can effectively enhance the magnetic field of the propulsion coil and reduce the excitation current of the propulsion coil.

[0016] The train is very suitable for elevated construction. When the train is running normally, the suspension coil and propulsion coil are only affected by the vertical electromagnetic force, so the train has low requirements on the lateral strength of the bridge.

[0017] Compared with the maglev train in the prior art, the present invention has significant advantages such as larger operating air gap, better self-stabilization performance, higher magnetic field utilization, excellent dynamic performance, flexible system structure, etc. In addition, the train also has advantages such as better curve passing ability, lower installation strength requirements and smaller magnetic shielding difficulty, etc. Therefore, the superconducting electric-electromagnetic hybrid maglev train of the present invention has a very large application prospect in future ultra-high-speed maglev rail transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional schematic diagram of a superconducting electric-electromagnetic hybrid maglev train.

[0019] Figure 2 This is a plan view of the superconducting magnet along the length of the train.

[0020] Figure 3 A side view of the propulsion coil along the length of the train.

[0021] Figure 4 This is the schematic diagram of the train running at low speed.

[0022] Figure 5 This is the schematic diagram of train suspension.

[0023] Figure 6 This is the schematic diagram of train suspension and guidance.

[0024] Among them, 1. superconducting magnet, 2. upper suspension coil, 3. cross-connecting wire, 4. lower suspension coil, 5. propulsion coil, 6. upper power generation coil, 7. lower power generation coil, 8. low temperature container, 9. heat conductive metal plate, 10. cold head, 11. auxiliary support wheel, 12. auxiliary guide wheel, 13. air spring, 14. ferromagnetic shielding material, 15. suspension frame, 16. ground track, 17. vehicle body, 18. magnetic skeleton, 2(a), left ring of upper suspension coil, 2(b), right ring of upper suspension coil, 4(a), left ring of lower suspension coil, 4(b), right ring of lower suspension coil. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0026] like Figures 1 to 3 As shown, the superconducting electric-electromagnetic hybrid maglev train of the present scheme comprises an "L"-shaped suspension frame 15 and an "I"-shaped ground track 16, the upper end of the suspension frame 15 is connected to the vehicle body 17 through an air spring 13; the suspension frame 15 is arranged on both sides of the ground track 16, and a gap is provided between the suspension frame 15 and the ground track 16; a plurality of superconducting magnets 1 are provided at the lower end of the suspension frame 15; an upper suspension coil 2 and a lower suspension coil 4 are provided at the upper and lower ends of the ground track 16, respectively, and an upper power generation coil 6 and a lower power generation coil 7 are provided on the upper and lower surfaces of the lower end of the suspension frame 15.

[0027] The superconducting magnet 1 is arranged between the upper power generation coil 6 and the lower power generation coil 7, and the upper power generation coil 6 and the upper suspension coil 2, and the lower power generation coil 7 and the lower suspension coil 4 are relatively distributed, the upper suspension coil 2 and the lower suspension coil 4 are electrically connected, and a propulsion coil 5 is arranged above the upper suspension coil 2.

[0028] The upper power generation coil 6 and the lower power generation coil 7 of this scheme have the same size, and the left-right symmetry plane of the upper power generation coil 6 and the lower power generation coil 7 coincides with the left-right symmetry plane of the superconducting magnet 1. The upper suspension coil 2 is composed of a left ring 2 (a) and a right ring 2 (b) connected in series, and the lower suspension coil 4 is composed of a left ring 4 (a) and a right ring 4 (b) connected in series. The upper suspension coil 2 and the lower suspension coil 4 are both in the shape of "8". The upper suspension coil 2 and the lower suspension coil 4 have the same number of turns. The upper suspension coil 2 and the lower suspension coil 4 are electrically connected through a cross-connection line 3. The left-right symmetry plane of the upper suspension coil 2 and the lower suspension coil 4 coincides with the left-right symmetry plane of the superconducting magnet 1. Several superconducting magnets 1 are arranged continuously along the length direction of the train. The left-right symmetry plane of the propulsion coil 5 coincides with the left-right symmetry plane of the superconducting magnet 1. The upper and lower symmetric planes of the superconducting magnet 1 are offset downward by a certain distance relative to the upper and lower symmetric planes of the upper suspension coil 2 and the lower suspension coil 4, so that the mutual inductance between the superconducting magnet 1 and the upper suspension coil 2 is equal to the mutual inductance between the superconducting magnet 1 and the lower suspension coil 4.

[0029] The superconducting magnet 1 is placed in a low-temperature container 8, which is arranged continuously along the length of the train. Each low-temperature container 8 contains four superconducting magnets 1. The superconducting magnet 1 is cooled by conduction cooling using a refrigerator. Metal plates 9 with good thermal conductivity and high mechanical strength are arranged on the upper and lower surfaces of the superconducting magnet 1. The cold head 10 of the refrigerator is connected to both ends of the metal plate 9, and the cold energy of the refrigerator is conducted from both ends of the metal plate 9 to the middle.

[0030] The propulsion coil 5 is wound on the magnetic frame 18, and the magnetic frame 18 adopts a silicon steel sheet structure. The silicon steel sheet has the function of enhancing the magnetic field of the propulsion coil, and also attracts the superconducting magnet 1, thereby improving the suspension and guiding ability of the train, and can play a role in shielding the magnetic field.

[0031] The left and right rings of the generating coils 6 and 7 have the same size. During the operation of the train, the magnetic field generated by the suspension coils 2 and 4 and the propulsion coil 5 acts on the generating coils 6 and 7, and an alternating current is induced in the generating coils 6 and 7. The current is supplied to the on-board equipment after rectification.

[0032] The ferromagnetic shielding material 14 adopts a structure of stacking multiple layers of silicon steel sheets, and the places where the magnetic field is weak inside the silicon steel sheets are hollowed out to reduce the amount of shielding material. The ferromagnetic shielding material 14 shields the magnetic field of the superconducting magnet 1, the suspension coils 2 and 4, and the propulsion coil 5. At the same time, the ferromagnetic shielding material 14 attracts the superconducting magnet 1 to improve the suspension and guidance capabilities of the train. The suspension frame 15 is made of high-strength, light-weight, non-magnetic aluminum alloy material.

[0033] The train has a large running air gap and excellent self-stabilization performance. The zero-flux suspension coils 2 and 4 are cross-connected by a cross-connection line 3, so the train has the characteristics of a large running air gap and good self-stabilization. In addition, the ferromagnetic shielding material 14 provided in the ground track 16 and the magnetic skeleton 18 of the propulsion coil 5 will attract the superconducting magnet 1, further enhancing the suspension force, guiding force and propulsion force of the train, so the train has a large running air gap and excellent self-stabilization performance.

[0034] The train has a higher utilization rate of the superconducting magnet magnetic field. Zero flux suspension coils 2 and 4 are arranged on the upper and lower sides of the superconducting magnet 1. During the operation of the train, the magnetic fields on the upper and lower sides of the superconducting magnet 1 generate induced currents in the suspension coils 2 and 4. The currents interact with the superconducting magnet 1 to generate electromagnetic force, providing the train with greater suspension and guiding force.

[0035] The train has excellent dynamic performance. Due to the geometric symmetry of the superconducting magnet 1, the suspension coils 2 and 4, and the propulsion coil 5, the electromagnetic forces generated by the superconducting magnets 1 on the left and right sides of the train are equal in magnitude and direction under any operating conditions, so there is no risk of yaw and roll of the train.

[0036] The train has excellent curve passing ability and flexible system structure. Since the superconducting magnet 1 and the suspension coils 2 and 4 are all located at the bottom of the car body, the lateral displacement constraint is released, and a larger lateral displacement can be allowed when passing through a curve; and the train has a larger lateral force and a stronger centripetal force, which effectively reduces the lateral length of the cross section of the track system, facilitating the flexible design of the line structure, especially reducing the tunnel section.

[0037] The superconducting magnet 1 has low magnetic load requirements and low magnetic shielding difficulty. Since the superconducting magnets 1 are arranged continuously along the length of the train, their size is reduced and their number is increased, which reduces the maximum value of the magnetic field of the magnet, thereby increasing the engineering current density of the superconducting magnet 1, better exerting the superconductivity of the material, and reducing the difficulty of magnetic shielding of the superconducting magnet 1.

[0038] The installation strength requirements of the superconducting magnet 1 and the suspension coils 2 and 4 are low. As the size of the superconducting magnet 1 decreases, the magnetomotive force decreases, and the attraction between the superconducting magnets 1 decreases, so the installation strength requirements of the superconducting magnet 1 in the cryogenic container 8 are reduced. When the train does not deviate laterally, there is no lateral force between the superconducting magnet 1 and the suspension coils 2 and 4, so the installation strength requirements of the suspension coils 2 and 4 in the ground track 16 are reduced.

[0039] The excitation current of the propulsion coil 5 is small and the magnetic field is strong. The magnetic frame 18 of the propulsion coil 5 adopts a silicon steel sheet structure, which can effectively enhance the magnetic field of the propulsion coil and reduce the excitation current of the propulsion coil.

[0040] The train is very suitable for elevated construction. When the train is running normally, the suspension coils 2 and 4 and the propulsion coil 5 are only subjected to the electromagnetic force in the vertical direction, so the train has low requirements on the lateral strength of the bridge.

[0041] Figures 4 to 6 Explain the suspension and guidance principle of the train. At this time, the magnetic pole direction of the superconducting magnet 1 on the left side of the train is vertically upward, and the magnetic pole direction of the superconducting magnet 1 on the right side of the train is vertically downward. When the train is stationary or running at a low speed, the train is supported by the auxiliary support wheel 11 and guided by the auxiliary guide wheel 12, and no induced current is generated in the suspension coils 2 and 4; after reaching the levitation speed, the train retracts the auxiliary wheels 11 and 12, and the suspension frame 15 shifts downward, and a current is induced in the suspension coils 2 and 4. This current interacts with the magnetic field of the superconducting magnet 1 to generate a suspension force to balance the weight of the train. When the train deviates laterally, a larger current is induced in the suspension coils 2 and 4. This current interacts with the magnetic field of the superconducting magnet 1 to generate a suspension force and a guiding force to balance the weight of the train and restore the train to a balanced position.

[0042] The suspension guidance principle of the train is described in detail as follows, taking the suspension frame on the left side of the train as an example:

[0043] When the train is stationary or running at a low speed, the train is supported by the auxiliary support wheels 11 and guided by the auxiliary guide wheels 12. The mutual inductance between the superconducting magnet 1 and the upper suspension coil 2 and the lower suspension coil 4 is equal. At this time, there are the following four situations:

[0044] (1) The magnetic fluxes generated by the superconducting magnet 1 in the left ring 2 (a) and the right ring 2 (b) of the suspension coil 2 are equal in magnitude and opposite in direction, so the net magnetic flux of the suspension coil 2 is zero;

[0045] (2) The magnetic fluxes generated by the superconducting magnet 1 in the left ring 4 (a) and the right ring 4 (b) of the suspension coil 4 are equal in magnitude and opposite in direction, so the net magnetic flux of the suspension coil 4 is zero;

[0046] (3) The magnetic fluxes generated by the superconducting magnet 1 in the left ring 2(a) of the suspension coil 2 and the left ring 4(a) of the suspension coil 4 are equal in magnitude and opposite in direction, so the net magnetic fluxes of the left ring 2(a) of the suspension coil 2 and the left ring 4(a) of the suspension coil 4 are zero;

[0047] (4) The magnetic fluxes generated by the superconducting magnet 1 in the right loop 2(b) of the suspension coil 2 and the right loop 4(b) of the suspension coil 4 are equal in magnitude and opposite in direction, so the net magnetic fluxes of the right loop 2(b) of the suspension coil 2 and the right loop 4(b) of the suspension coil 4 are zero.

[0048] In summary, no induced current is generated in the suspension coils 2 and 4, so there is no force between the superconducting magnet 1 and the suspension coils 2 and 4. There is a constant vertical upward attraction between the superconducting magnet 1 and the magnetic frame 18 and the ferromagnetic shielding material 14. Therefore, the vehicle body 17 is subjected to a constant suspension force provided by the suspension frame 15.

[0049] After the train reaches the levitation speed, the train deviates downward, the mutual inductance between the superconducting magnet 1 and the upper suspension coil 2 and the lower suspension coil 4 is not equal, and the mutual inductance between the superconducting magnet 1 and the upper suspension coil 2 is smaller than the mutual inductance between the superconducting magnet 1 and the lower suspension coil 4. At this time, there are the following four situations:

[0050] (1) The magnetic fluxes generated by the superconducting magnet 1 in the left ring 2 (a) and the right ring 2 (b) of the suspension coil 2 are equal in magnitude and opposite in direction, so the net magnetic flux of the suspension coil 2 is zero;

[0051] (2) The magnetic fluxes generated by the superconducting magnet 1 in the left ring 4 (a) and the right ring 4 (b) of the suspension coil 4 are equal in magnitude and opposite in direction, so the net magnetic flux of the suspension coil 4 is zero;

[0052] (3) The magnetic flux generated by the superconducting magnet 1 in the left ring 2(a) of the suspension coil 2 is smaller than the magnetic flux generated in the left ring 4(a) of the suspension coil 4. Therefore, the net magnetic flux of the left ring 2(a) and the left ring 4(a) is not zero, and an induced current is generated in the left ring 2(a) and the left ring 4(a), so that the magnetic pole of the left ring 2(a) is directed upward and the magnetic pole of the left ring 4(a) is directed downward.

[0053] (4) The magnetic flux generated by the superconducting magnet 1 in the right ring 2(b) of the suspension coil 2 is smaller than the magnetic flux generated in the right ring 4(b) of the suspension coil 4. Therefore, the net magnetic flux of the right ring 2(b) and the right ring 4(b) is not zero. Induced current is generated in the right ring 2(b) and the right ring 4(b), so that the magnetic pole of the right ring 2(b) is directed upward and the magnetic pole of the right ring 4(b) is directed downward.

[0054] In summary, after the train deviates downward, the left ring 2(a) and the right ring 2(b) of the suspension coil 2 both attract the superconducting magnet 1 obliquely upward, so under the action of the suspension coil 2, the superconducting magnet 1 is subjected to an upward attractive force, and the lateral force is zero; the left ring 4(a) and the right ring 4(b) of the suspension coil 4 both repel the superconducting magnet 1 obliquely upward, so under the action of the suspension coil 4, the superconducting magnet 1 is subjected to an upward repulsive force, and the lateral force is zero. Therefore, under the joint action of the suspension coils 2 and 4, the superconducting magnet 1 is subjected to an upward suspension force, and the lateral force is zero. In addition, there is a vertical upward attraction between the superconducting magnet 1 and the magnetic skeleton 18 and the ferromagnetic shielding material 14. Therefore, the car body 17 is subjected to the suspension force provided by the suspension frame 15 to balance the weight of the train.

[0055] After the train deviates downward, it deviates to the left laterally. The mutual inductance between the superconducting magnet 1 and the upper suspension coil 2 and the lower suspension coil 4 is not equal, and the mutual inductance between the superconducting magnet 1 and the upper suspension coil 2 is smaller than the mutual inductance between the superconducting magnet 1 and the lower suspension coil 4. At this time, there are the following four situations:

[0056] (1) The magnetic flux generated by the superconducting magnet 1 in the left ring 2(a) of the suspension coil 2 is greater than the magnetic flux generated in the right ring 2(b) of the suspension coil 2. Therefore, the net magnetic flux of the left ring 2(a) and the right ring 2(b) is not zero. Induction currents are generated in the left ring 2(a) and the right ring 2(b), so that the magnetic pole of the left ring 2(a) points downward and the magnetic pole of the right ring 2(b) points upward.

[0057] (2) The magnetic flux generated by the superconducting magnet 1 in the left ring 4(a) of the suspension coil 4 is greater than the magnetic flux generated in the right ring 4(b) of the suspension coil 4. Therefore, the net magnetic flux of the left ring 4(a) and the right ring 4(b) is not zero. Induction currents are generated in the left ring 4(a) and the right ring 4(b), so that the magnetic pole of the left ring 4(a) points downward and the magnetic pole of the right ring 4(b) points upward.

[0058] (3) The magnetic flux generated by the superconducting magnet 1 in the left ring 2(a) of the suspension coil 2 is smaller than the magnetic flux generated in the left ring 4(a) of the suspension coil 4. Therefore, the net magnetic flux of the left ring 2(a) and the left ring 4(a) is not zero. Induction currents are generated in the left ring 2(a) and the left ring 4(a), so that the magnetic pole of the left ring 2(a) points upward and the magnetic pole of the left ring 4(a) points downward.

[0059] (4) The magnetic flux generated by the superconducting magnet 1 in the right ring 2(b) of the suspension coil 2 is smaller than the magnetic flux generated in the right ring 4(b) of the suspension coil 4. Therefore, the net magnetic flux of the right ring 2(b) and the right ring 4(b) is not zero. Induced current is generated in the right ring 2(b) and the right ring 4(b), so that the magnetic pole of the right ring 2(b) is directed upward and the magnetic pole of the right ring 4(b) is directed downward.

[0060] According to the principle of superposition of magnetic fields, the magnetic fields of the right ring 2(b) and the left ring 4(a) are enhanced, while the magnetic fields of the left ring 2(a) and the right ring 4(b) are weakened. Finally, the magnetic pole of the left ring 2(a) is facing downward, the magnetic pole of the right ring 2(b) is facing upward, the magnetic pole of the left ring 4(a) is facing downward, and the magnetic pole of the right ring 4(b) is facing upward.

[0061] In summary, the left ring 2(a) of the suspension coil 2 repels the superconducting magnet 1 obliquely downward, and the right ring 2(b) of the suspension coil 2 attracts the superconducting magnet 1 obliquely upward, and the force of the right ring 2(b) attracting the superconducting magnet 1 obliquely upward is greater than the force of the left ring 2(a) repelling the superconducting magnet 1 obliquely downward, so under the action of the suspension coil 2, the superconducting magnet 1 is subjected to two components of force, namely, rightward and upward; the left ring 4(a) of the suspension coil 4 repels the superconducting magnet 1 obliquely upward, and the right ring 4(b) of the suspension coil 4 attracts the superconducting magnet 1 obliquely downward, and the force of the left ring 4(a) repelling the superconducting magnet 1 obliquely upward is greater than the force of the right ring 4(b) attracting the superconducting magnet 1 obliquely downward; so under the action of the suspension coil 4, the superconducting magnet 1 is subjected to two components of force, namely, rightward and upward. Therefore, under the joint action of the suspension coils 2 and 4, the superconducting magnet 1 is subjected to a rightward guiding force and an upward suspension force. In addition, there is an oblique upward attraction between the superconducting magnet 1 and the magnetic skeleton 18 and the ferromagnetic shielding material 14, and the attraction can be decomposed into two components, namely, the rightward and upward forces. Therefore, the car body 17 is subjected to the suspension force provided by the suspension frame 15 to balance the weight of the train, and at the same time, the train is subjected to the guiding force provided by the suspension frame 15 to restore the train to its equilibrium position.

[0062] Due to the geometric symmetry of the left and right suspension frames of the train, under any operating conditions, the force exerted on the right suspension frame of the train is equal in magnitude and direction to the force exerted on the left suspension frame. Therefore, there is no risk of yaw and roll of the train, and the train has excellent dynamic performance.

Claims

1. A superconducting electric-electromagnetic hybrid maglev train, characterized in that: The invention comprises an L-shaped suspension frame (15) and an "I"-shaped ground track (16); the upper end of the suspension frame (15) is connected to a vehicle body (17) via an air spring (13); the suspension frame (15) is arranged on both sides of the ground track (16), and a gap is provided between the suspension frame (15) and the ground track (16); a power generation coil and a plurality of superconducting magnets (1) are provided at the lower end of the suspension frame (15); an "8"-shaped upper suspension coil (2) and an "8"-shaped lower suspension coil (4) are respectively provided at the upper and lower ends of the ground track (16); a propulsion coil (5) is provided inside the ground track (16); The power generation coil comprises an upper power generation coil (6) and a lower power generation coil (7); the superconducting magnet (1) is arranged between the upper power generation coil (6) and the lower power generation coil (7), and the upper power generation coil (6) and the upper suspension coil (2) are relatively distributed, and the lower power generation coil (7) and the lower suspension coil (4) are relatively distributed, and the upper suspension coil (2) and the lower suspension coil (4) are electrically connected via a cross connection line (3); The upper power generation coil (6) and the lower power generation coil (7) are both composed of two left and right rings of the same size, and the left and right symmetric planes of the upper power generation coil (6) and the lower power generation coil (7) coincide with the left and right symmetric planes of the superconducting magnet (1); The upper suspension coil (2) and the lower suspension coil (4) are both in close contact with the surface of the ground track (16), and the upper power generation coil (6) and the lower power generation coil (7) are both in close contact with the surface of the lower end of the suspension frame (15).

2. The superconducting electric-electromagnetic hybrid maglev train according to claim 1, characterized in that: The propulsion coil (5) is arranged above the upper suspension coil (2), and the propulsion coil (5) is wound on a magnetic frame (18) composed of silicon steel sheets.

3. The superconducting electric-electromagnetic hybrid maglev train according to claim 1, characterized in that: The propulsion coil (5) is arranged below the lower suspension coil (4), and the propulsion coil (5) is wound on a non-magnetic frame.

4. The superconducting electric-electromagnetic hybrid maglev train according to claim 1, characterized in that: The upper and lower ends of the superconducting magnet (1) are both provided with heat-conducting metal plates (9), the heat-conducting metal plates (9) and the superconducting magnet (1) are arranged in a low-temperature container (8), and the heat-conducting metal plates (9) are connected to a cold head (10) of a refrigerator.

5. The superconducting electric-electromagnetic hybrid maglev train according to claim 1, characterized in that: A ferromagnetic shielding material (14) is arranged inside the ground track (16), and the ferromagnetic shielding material (14) is composed of a plurality of stacked layers of silicon steel sheets.

6. The superconducting electric-electromagnetic hybrid maglev train according to claim 1, characterized in that: The suspension frame (15) is provided with an auxiliary guide wheel (12) and an auxiliary support wheel (11), wherein the auxiliary guide wheel (12) is arranged opposite to the side surface of the ground track (16), and the auxiliary support wheel (11) is arranged opposite to the upper surface of the lower end of the ground track (16).

7. The superconducting electric-electromagnetic hybrid maglev train system according to claim 1 is characterized in that: The upper and lower symmetric planes of the superconducting magnet (1) are offset downward by a certain distance relative to the upper and lower symmetric planes of the upper suspension coil (2) and the lower suspension coil (4), so that the mutual inductance between the superconducting magnet (1) and the upper suspension coil (2) is equal to the mutual inductance between the superconducting magnet (1) and the lower suspension coil (4).

Images