Superconducting assisted starting structure

Abstract

The present invention discloses a superconducting auxiliary starting structure, including: a disc-type wheel hub motor; the wheel hub motor is integrated into the wheel and provides the wheel running rotational force through the rotation of its rotor; it also includes a superconducting motor, the stator of the wheel hub motor is linked with the rotor shaft of the superconducting motor to obtain the driving force for auxiliary starting; the rotor of the wheel hub motor is fixedly connected to the wheel hub, and the shaft hole of the wheel hub and the stator shaft of the wheel hub motor are assembled through a bearing; the stator of the superconducting motor is fixed to the vehicle body, and the rotor shaft of the superconducting motor is meshed with the stator shaft of the wheel hub motor through a gear assembly. The structural layout is reasonable, through the combination of the wheel hub motor and the superconducting motor, the wheel hub motor provides driving force for the wheel, and the superconducting motor is connected to the wheel hub motor to provide auxiliary acceleration or auxiliary deceleration. Moreover, the transmission is simple and stable, and the power of the superconducting motor can be transmitted to each wheel hub motor through the cooperation of the clutch and the helical gear box.

Description

Technical Field

[0001] The invention relates to the field of superconducting technology, in particular to a superconducting auxiliary starting structure. Background Art

[0002] A superconducting electric machine is a motor whose excitation winding is made of superconducting materials and can carry high-density current in a strong magnetic field. By taking advantage of the characteristic that the resistance of superconducting materials becomes zero in a low-temperature environment, a strong current can pass through a not very thick wire to generate a strong magnetic field, that is, to form a superconducting magnet. Since there is no power loss in the excitation winding, the motor size is significantly reduced, the power density is high, and the efficiency is high.

[0003] With the popularization of superconducting motors, they are gradually being widely used in various fields. For example, superconducting motors are used in auxiliary power of vehicles, especially for high-speed vehicles with large mass such as trains and EMUs, which often start slowly and have poor braking. Therefore, a power transmission structure that can assist in starting and braking is designed. Summary of the invention

[0004] The purpose of the present invention is to provide a superconducting auxiliary starting structure, especially a superconducting auxiliary starting structure for rail transportation. Since rail transportation uses the centripetal force provided by the track inclination to complete the steering, it does not need to provide a speed difference through a differential to ensure the steering like a car, so the application in rail transportation can greatly reduce the control difficulty of the step-by-step drive disc hub motor.

[0005] The technical solution of the present invention is: a superconducting auxiliary starting structure, based on the power structure of the hub motor, adds a superconducting motor in the power transmission, and provides short-term high torque through the high current carrying capacity of the superconducting material to provide auxiliary power for starting and reverse power for braking.

[0006] Specifically, the superconducting assisted starting structure includes: a hub motor and a superconducting motor.

[0007] The wheel hub motor includes a wheel hub motor rotor and a wheel hub motor stator. The wheel hub motor stator includes a stator shaft, and the stator shaft is assembled with the housing of the wheel hub motor through a bearing. The wheel hub motor rotor is connected to the housing through bolts, and the wheel hub motor rotor can directly transmit the rotational force to the housing, thereby driving the wheel to rotate. The wheel hub motor is a disc motor, and the two opposite motors are in a mirror relationship. The rotor is composed of a surface-mounted neodymium iron boron material and a magnetic rotor back iron. The two opposite motor rotors are coaxially connected, which can be regarded as a single-rotor double-stator disc motor with a very long axial length. The two rotors connected coaxially in a mirror image can balance the unilateral magnetic pull. At the same time, this layout is also conducive to cooling the high-energy-density disc motor and reducing the temperature rise problem caused by the disc motor being too compact.

[0008] The wheel hub motor provides driving force for the wheels, but since the initial speed of the vehicle is small when it starts, the momentum is also small, the vehicle body running speed is not obvious, and the acceleration is slow. Therefore, inputting a positive power (rotational force in the same direction as the wheel hub motor rotor) to the stator shaft of the wheel hub motor can provide rotational inertia for the stator shaft of the wheel hub motor. On the basis of the stator rotating, the rotor of the wheel hub motor rotates at the same time to increase the overall rotation speed of the wheel hub motor.

[0009] Similarly, when braking is required, a reverse force (rotational force in the opposite direction to the rotor of the hub motor) is input to the stator shaft of the hub motor to provide relative reverse rotation for the stator shaft of the hub motor. At this time, the rotor of the hub motor receives a reverse pulling force to reduce speed, thereby reducing the overall rotation speed of the hub motor.

[0010] Specifically, the rotor of the wheel hub motor is fixedly connected to the wheel hub, and the shaft hole of the wheel hub and the stator shaft of the wheel hub motor are assembled through a bearing.

[0011] The stator of the superconducting motor is fixed on the vehicle body, and the rotor shaft of the superconducting motor is meshed and driven with the stator shaft of the hub motor through a gear assembly.

[0012] Preferably, the rotation axis of the hub motor is perpendicular to the rotation axis of the superconducting motor, and the rotor shaft of the superconducting motor is linked to the stator shaft of the hub motor through a helical gear box.

[0013] Both ends of the rotor shaft of the superconducting motor are transmitted to the corresponding hub motor through the helical gearbox on the corresponding side.

[0014] The best structural method is that every four wheel hub motors and one superconducting motor form a power group. The two wheel hub motors located in a coaxial relationship are driven by the superconducting motor through the same helical gearbox. The helical gearbox is used to ensure that the starting energy of the auxiliary starting superconducting motor is smoothly input to the four wheels.

[0015] The superconducting motor is connected to the gearbox, and a clutch is set between the output end of the superconducting motor and the input end of the helical gearbox. The purpose of setting the clutch is: when the predetermined starting speed is reached, the superconducting motor is disconnected from the power generation system and no large current is input into the superconducting winding. The overall system saves energy and reserves energy for the next braking. During this process, if the superconducting rotor is still rotating, the corresponding magnetic field will be induced in the superconducting stator to "stop" the rotor from rotating, and the superconducting motor will generate electricity at this time. The purpose of the clutch is to prevent the resistance generated by this operating state and separate the superconducting motor from the overall power chain in advance.

[0016] The advantages of the present invention are:

[0017] 1. The structural layout is reasonable. Through the combination of the wheel hub motor and the superconducting motor, the wheel hub motor provides driving force for the wheel, and the superconducting motor is connected to the wheel hub motor to provide auxiliary acceleration or auxiliary deceleration.

[0018] 2. The transmission is simple and stable. Through the cooperation of the clutch and the helical gearbox, the power of the superconducting motor can be transmitted to each wheel hub motor. Moreover, the coupling control can combine the power at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 This is a three-dimensional diagram of the superconducting assisted starting structure;

[0021] Figure 2 It is a transverse cross-sectional view of the superconducting assisted starting structure;

[0022] Figure 3 It is a longitudinal cross-sectional view of the superconducting assisted starting structure;

[0023] Among them: 1. hub motor; 11. hub motor rotor; 12. hub motor stator; 13. stator shaft; 14. housing; 2. superconducting motor; 21. superconducting motor rotor; 22. superconducting motor stator; 23. rotor shaft; 3. clutch; 4. helical gearbox; 5. transmission shaft. DETAILED DESCRIPTION

[0024] Preferred embodiment 1 of the present invention:

[0025] The superconducting auxiliary starting structure includes: a hub motor 1 and a superconducting motor 2.

[0026] The wheel hub motor includes a wheel hub motor rotor 11 and a wheel hub motor stator 12. The wheel hub motor stator includes a stator shaft 13, and the stator shaft 13 is assembled with the housing 14 of the wheel hub motor through a bearing. The wheel hub motor rotor 11 is connected to the housing 14 through bolts, and the wheel hub motor rotor 11 can directly transmit the rotational force to the housing 14, thereby driving the wheel to rotate.

[0027] The wheel hub motor 1 provides driving force for the wheels, but since the initial speed of the vehicle is small when it starts, the momentum is also small, the vehicle body running speed is not obvious, and the acceleration is slow. Therefore, a positive power (rotational force in the same direction as the wheel hub motor rotor) is input to the stator shaft 13 of the wheel hub motor 1, which can provide rotational inertia for the stator shaft 13 of the wheel hub motor 1. On the basis of the rotation of the wheel hub motor stator 12, the wheel hub motor rotor 11 rotates at the same time to increase the overall rotation speed of the wheel hub motor 1.

[0028] Similarly, when braking is required, a reverse power (rotational force in the opposite direction to the wheel hub motor rotor) is inputted to the stator shaft 13 of the wheel hub motor 1, which can provide relative reverse rotation for the stator shaft 13 of the wheel hub motor 1. At this time, the wheel hub motor rotor 11 obtains a reverse pulling force to reduce the speed, thereby reducing the overall rotation speed of the wheel hub motor 1.

[0029] Therefore, a superconducting motor 2 is arranged, and the superconducting motor includes a superconducting motor rotor 21 and a superconducting motor stator 22. The superconducting motor rotor includes a rotor shaft 23, and the superconducting motor stator 22 is fixed on the vehicle body. The superconducting motor rotor 21 transmits power to the stator shaft 13 of the wheel hub motor 1. In order to achieve transmission separation, the rotor shaft 23 of the superconducting motor 2 is powered by the clutch 3.

[0030] The clutch assists in starting through the large torque of the superconducting motor during the starting phase; it disengages after reaching a set speed, avoiding the superconducting motor from generating electricity after power failure and adding unnecessary resistance.

[0031] In this embodiment, the structure of the superconducting motor 2 may be a stator superconducting superconducting motor, a rotor superconducting superconducting motor, or a stator and rotor full superconducting superconducting motor.

[0032] Preferred embodiment 2 of the present invention:

[0033] The combination of the superconducting motor 2 and the hub motor 1 can be one-to-one, that is, one superconducting motor 2 corresponds to one hub motor 1. Obviously, such a structure is costly and difficult to arrange. Although it is not reasonable, it is feasible.

[0034] It is also possible to combine one superconducting motor 2 with every two wheel hub motors 1. This structure is more reasonable than the above structure, but it is obviously not the best. The best combination is that every four wheel hub motors 1 and one superconducting motor 2 form a power group for power assistance.

[0035] Specifically, Figure 1 As shown, the superconducting assisted starting structure includes: four wheel hub motors 1, a superconducting motor 2, two clutches 3, and two helical gear boxes 4.

[0036] The two front wheel hub motors 1 share a helical gearbox 4, and the two rear wheel hub motors 1 share a helical gearbox 4. A superconducting motor 2 is arranged between the four wheel hub motors 1, and the two output ends of the superconducting motor 2 are respectively connected to the transmission shaft 5 through the clutch 3, and the two transmission shafts 5 are correspondingly assembled in the corresponding helical gearbox 4.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A superconducting assisted starting structure, comprising: Hub motor; The wheel hub motor is integrated into the wheel and provides the wheel with rotational force through the rotation of its rotor; it is characterized in that: it also includes a superconducting motor, the stator of the wheel hub motor is linked with the rotor shaft of the superconducting motor to obtain the driving force for auxiliary starting; The rotor of the wheel hub motor is fixedly connected to the wheel hub, and the shaft hole of the wheel hub and the stator shaft of the wheel hub motor are assembled through a bearing member; The stator of the superconducting motor is fixed on the vehicle body, and the rotor shaft of the superconducting motor is meshed and driven with the stator shaft of the hub motor through a gear assembly; comprising a clutch, the clutch being arranged between the rotor shaft of the superconducting motor and the corresponding helical gearbox to ensure that the superconducting rotor does not increase resistance in a power generation state after the superconducting motor is powered off; The rotation axis of the wheel hub motor is perpendicular to the rotation axis of the superconducting motor, and the rotor shaft of the superconducting motor is linked with the stator shaft of the wheel hub motor through a helical gear box; Both ends of the rotor shaft of the superconducting motor are transmitted to the corresponding hub motor through the helical gearbox on the corresponding side; Every four wheel hub motors and a superconducting motor form a power group; The two hub motors located in a coaxial relationship are driven by the superconducting motor through the same helical gear box.

2. A superconducting assisted starting structure according to claim 1, characterized in that: The superconducting modes of the superconducting motor include: stator superconducting, rotor superconducting, and full superconducting.

Images