Levitation bogie and medium-low speed maglev train

Abstract

A levitation bogie, comprising a bogie frame (103), support arms (105), electromagnet box beams (106), and traction motor stators (104), wherein top ends of the support arms (105) are fixed to end portions of the bogie frame (103), and the support arms (105) are located below the bogie frame (103); and the electromagnet box beams (106) are mounted at bottom ends of the support arms (105) and each are assembled with a levitation electromagnet, and each traction motor stator (104) is embedded in the corresponding levitation electromagnet. Also disclosed is a medium-low speed maglev train. In the levitation bogie, the traction motor stators (104) are embedded in the levitation electromagnets, making the direction of the normal force of a traction motor be the same as that of the electromagnetic force of the levitation electromagnets. The normal force of the traction motor is used to assist levitation of the train, and the electromagnetic force of the levitation electromagnets is reduced, thereby effectively reducing energy consumption for the levitation of the train.

Description

Suspension frame and medium and low speed maglev trains

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 12, 2023, with application number 202311707907.7 and invention name “Suspension Frame and Medium and Low Speed ​​Maglev Train”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of magnetic levitation transportation, and more particularly to a suspension frame and a medium- and low-speed magnetic levitation train. Background Art

[0003] Low- and medium-speed maglev transportation offers advantages such as low noise, low vibration, low radiation, low cost, strong gradeability, and a small turning radius. The suspension frame and F-shaped track of low- and medium-speed maglev trains utilize a vehicle-on-track structure. The suspension frame is equipped with a linear motor and levitation electromagnets, with the linear motor located above the F-shaped track and the levitation electromagnets located below. When energized, the levitation electromagnets generate an electromagnetic force that attracts the F-shaped track, levitating the entire low- and medium-speed maglev train.

[0004] However, the existing medium and low speed maglev trains have high suspension energy consumption, so how to reduce the suspension energy consumption of medium and low speed maglev trains is a problem that needs to be solved urgently by those skilled in the art.

[0005] Summary of the Invention

[0006] In light of this, the present invention provides a suspension frame in which the traction motor stator is embedded within the suspension electromagnet. This ensures that the normal force of the traction motor aligns with the electromagnetic force of the suspension electromagnet. This normal force of the traction motor assists in levitation of the train, reducing the electromagnetic force of the suspension electromagnet, thereby effectively reducing the train's levitation energy consumption. The present invention also provides a medium- and low-speed maglev train utilizing this suspension frame, which can reduce the levitation energy consumption of medium- and low-speed maglev trains.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A suspension frame, comprising:

[0009] framework;

[0010] A supporting arm, the top end of which is fixed to the end of the frame, and the supporting arm is located below the frame;

[0011] An electromagnetic box beam, the electromagnetic box beam being mounted on the bottom end of the support arm; the electromagnetic box beam being equipped with a suspension electromagnet;

[0012] A traction motor stator is embedded in the suspension electromagnet.

[0013] Optionally, in the above suspension frame, the traction motor stator includes:

[0014] an electromagnet core, the electromagnet core comprising a first end portion, a middle portion, and a second end portion connected in sequence, wherein the first end portion, the middle portion, and the second end portion form a groove; the traction motor stator is assembled in the groove;

[0015] The electromagnet winding is wound around the end of the electromagnet core.

[0016] Optionally, the suspension frame further includes a water cooling plate, which is fixedly connected to the traction motor stator and / or the suspension electromagnet and fits with the traction motor stator and / or the suspension electromagnet.

[0017] Optionally, in the above suspension frame, the water-cooling plate is sandwiched between the middle part and the traction motor stator.

[0018] Optionally, in the above-mentioned suspension frame, the upper surface of the traction motor stator is coplanar with the upper surface of the electromagnet core; the upper surface of the electromagnet core includes an end surface of the first end facing away from the end of the middle part, and an end surface of the second end facing away from the end of the middle part.

[0019] Optionally, in the above-mentioned suspension frame, a skid is fixed to the frame, and the frame is also provided with emergency rescue wheels that can be raised and lowered.

[0020] Optionally, in the above-mentioned suspension frame, the emergency rescue wheel is installed on the frame through a hydraulic device.

[0021] Optionally, in the above-mentioned suspension frame, the emergency rescue wheels and the slide are arranged along a preset direction; the preset direction is perpendicular to the direction from one end to the other end of the supporting arm.

[0022] Optionally, in the above-mentioned suspension frame, the frame connected to the support arm and the electromagnet box beam are both located on the same side of the support arm.

[0023] A medium- and low-speed maglev train comprises a car body and a suspension frame installed below the car body, wherein the suspension frame is the suspension frame described in any one of the above technical solutions.

[0024] The present invention provides a suspension frame, comprising a frame, a supporting arm, an electromagnet box beam and a traction motor stator; the top end of the supporting arm is fixed to the end of the frame, and the supporting arm is located below the frame; the electromagnet box beam is installed at the bottom end of the supporting arm; the electromagnet box beam is equipped with a suspension electromagnet; and the traction motor stator is embedded in the suspension electromagnet.

[0025] In the above-mentioned suspension frame, the stator of the traction motor is embedded in the suspension electromagnet, so that the normal force of the traction motor is in the same direction as the electromagnetic force of the suspension electromagnet. The normal force of the traction motor is used to assist the train suspension, reduce the electromagnetic force of the suspension electromagnet, and thus effectively reduce the train suspension energy consumption.

[0026] The present invention also provides a medium- and low-speed maglev train using the suspension frame, which can reduce the suspension energy consumption of the medium- and low-speed maglev train. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] FIG1 is a schematic diagram of the assembly of a suspension frame and a track provided in an embodiment of the present invention;

[0029] FIG2 is a schematic diagram of the force applied to a medium- and low-speed maglev train in a straight-line running state according to an embodiment of the present invention;

[0030] FIG3 is a schematic diagram of the force applied to a medium- and low-speed maglev train when traveling on a curve, according to an embodiment of the present invention;

[0031] FIG4 is a schematic diagram of the assembly of the suspension frame and the track at another angle according to an embodiment of the present invention;

[0032] Among them, in Figures 1 to 4:

[0033] Sled 101; emergency rescue wheel 102; frame 103; traction motor stator 104; support arm 105; electromagnet box beam 106; water cooling plate 107; electromagnet core 108; electromagnet winding 109; mechanical brake device 110; M-shaped track 111; track steel pad 112; reaction plate bracket 113; track 114. DETAILED DESCRIPTION

[0034] Embodiments of the present invention disclose a suspension frame in which the stator of a traction motor is embedded within a suspension electromagnet. This ensures that the normal force of the traction motor aligns with the electromagnetic force of the suspension electromagnet. This normal force of the traction motor assists in levitation of the train, reducing the electromagnetic force of the suspension electromagnet, thereby effectively reducing the train's levitation energy consumption. Embodiments of the present invention also provide a medium- and low-speed maglev train employing this suspension frame, which can reduce the levitation energy consumption of medium- and low-speed maglev trains.

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] 1 to 4 , an embodiment of the present invention provides a suspension frame, comprising a frame 103, a support arm 105, an electromagnet box beam 106, and a traction motor stator 104; the top end of the support arm 105 is fixed to the end of the frame 103, and the support arm 105 is located below the frame 103; the electromagnet box beam 106 is installed at the bottom end of the support arm 105; the electromagnet box beam 106 is equipped with a suspension electromagnet; and the traction motor stator 104 is embedded in the suspension electromagnet.

[0037] In the above suspension frame, the traction motor stator 104 is embedded in the suspension electromagnet, so that the normal force of the traction motor is in the same direction as the electromagnetic force of the suspension electromagnet. The normal force of the traction motor is used to assist the train suspension, reduce the electromagnetic force of the suspension electromagnet, and thus effectively reduce the train suspension energy consumption.

[0038] In the above-mentioned suspension frame, there are multiple supporting arms 105, which are distributed on both sides of the frame 103; the frame 103 and the electromagnetic box beam 106 connected to the same supporting arm 105 are located on the same side of the supporting arm 105; the frame 103, the supporting arm 105 and the electromagnetic box beam 106 form a semi-enclosed structure, which is used to surround the outer periphery of the track to form a "car-holding-track" structural form.

[0039] The traction motor stator 104 includes an electromagnet core 108 and electromagnet windings 109. The electromagnet core 108 includes a first end, a middle portion, and a second end connected in sequence, which form a groove. The traction motor stator 104 is mounted within the groove formed by the first, middle, and second ends. The electromagnet windings 109 are wound around the ends of the electromagnet core 108, with the first and second ends respectively wound with electromagnet windings 109. The middle portion of the electromagnet core 108 is fixed above the electromagnet box beam 106, with the first and second ends located above the middle portion, as shown in Figure 1.

[0040] In some embodiments, the suspension frame further includes a water cooling plate 107 , which is fixedly connected to the traction motor stator 104 and / or the suspension electromagnet and fits closely to the traction motor stator 104 and / or the suspension electromagnet.

[0041] The suspension frame provided in this embodiment changes the existing medium and low speed maglev train from a single air cooling method to a shared air cooling and water cooling method, reducing the heat of the traction motor stator 104 and / or the electromagnet winding 109 of the suspension electromagnet, and extending the service life of the traction motor stator 104 and / or the suspension electromagnet.

[0042] The water cooling plate 107 is sandwiched between the middle portion of the traction motor stator 104 and the electromagnet core 108, and can dissipate heat for the traction motor stator 104 and the suspension electromagnet. The electromagnet box beam 106 is made of lightweight aluminum profiles.

[0043] In some embodiments, the upper surface of the traction motor stator 104 is coplanar with the upper surface of the electromagnet core 108; the upper surface of the electromagnet core 108 includes an end surface of the first end facing away from the middle part, and an end surface of the second end facing away from the middle part.

[0044] To prevent the traction motor stator from colliding with the track, a certain gap must be reserved in the prior art. In the non-suspended state, the gap between the coils of the traction motor stator installed on medium- and low-speed maglev trains and the reaction plate installed on the track is generally 5 mm. In the suspended state, because the traction motor stator and the suspension electromagnets are distributed on the upper and lower sides of the F-shaped track, the suspension electromagnets and the track interact to achieve levitation of the medium- and low-speed maglev train. This increases the gap between the traction motor stator and the reaction plate installed on the track (i.e., the motor air gap). The suspension gap is generally controlled at 8 mm to 10 mm, allowing the motor air gap to reach 13 mm to 15 mm. This reduces the traction motor efficiency to only 60% to 70%, resulting in energy waste.

[0045] In the suspension frame provided in this embodiment, the traction motor stator 104 is embedded in the electromagnet core 108. In the non-suspended state, the upper surface of the traction motor stator 104 is coplanar with the upper surface of the electromagnet core 108, and no additional safety gap is required. At the same time, by improving the control accuracy of the train suspension system, the suspension gap can be reduced from 8mm-10mm to 7mm, and the air gap of the traction motor can be reduced from 13mm-15mm to 7mm, which can reduce the suspension energy consumption by more than 30% and improve the efficiency of the traction motor by more than 10%.

[0046] A skid 101 is fixed to the lower side of the frame 103 , and an emergency rescue wheel 102 that can be raised and lowered is also provided on the lower side of the frame 103 .

[0047] When a medium- and low-speed maglev train needs to stop or experience an emergency power outage, the skid 101 can provide support for the train, preventing other components on the suspension frame from colliding with the track and ensuring the train's safety. If a medium- and low-speed maglev train's traction system fails and it becomes unable to move, the emergency rescue wheels 102 can be lowered to support the train, allowing a rescue vehicle or other normally operating vehicle to tow the train back to the depot at low speed.

[0048] Emergency wheels 102 are mounted on frame 103 via hydraulics, and are raised and lowered using these hydraulics. Emergency wheels 102 and sled 101 are arranged along a predetermined direction; this predetermined direction is perpendicular to the direction from one end of support arm 105 to the other, meaning it is parallel to the direction of travel of the medium- and low-speed maglev train.

[0049] The support arm 105 is made of cast aluminum material. The upper end of the support arm 105 is connected to the frame 103 of the suspension frame, and the lower end is installed with an electromagnet box beam 106 through a spring. A mechanical brake device 110 is installed on the side of the middle of the support arm 105 facing the track 114, which plays the role of transmitting traction, braking and suspension force, and also has the function of reducing vibration and improving comfort.

[0050] The suspension frame provided in this embodiment cooperates with the track to form a vehicle-holding-track structure, which can retain the technical advantages of existing medium and low-speed maglev vehicles such as low noise, low vibration, low radiation, low cost, strong climbing ability, and small turning radius. The suspension frame solves the problem of the existing embedded maglev train having no controllable mechanical brakes and no emergency rescue support by adding a mechanical brake device 110 and an emergency rescue wheel 102, and meets the relevant standards and requirements of urban rail transit. At the same time, the suspension frame provided in this embodiment adopts a horizontal frame 103 with a support arm 105 structure, and adopts a vehicle-holding-track operation mode, which can ensure the safety of train operation and the convenience of maintenance; and the suspension frame avoids the use of F-shaped tracks, can reduce the train gauge, and is conducive to the miniaturization and lightweighting of medium and low-speed maglev trains, reducing the cost of train manufacturing, and meeting the small-volume passenger transportation needs of urban rail transit terminals and tourist attractions.

[0051] Furthermore, the suspension frame provided in this embodiment avoids the use of F-shaped tracks and will not be affected by the track section during repair and maintenance. There is no need to set up a dedicated maintenance platform and move the suspension frame out using dedicated tooling, which avoids the difficulty and long working hours required for repair and maintenance work, and is conducive to ensuring the availability and maintainability indicators of the train.

[0052] The embodiment of the present invention further provides a medium-low speed maglev train, comprising a car body and a suspension frame installed below the car body, the suspension frame being the suspension frame provided in the above embodiment.

[0053] The track 114 used with the low- and medium-speed maglev trains includes a top crossbeam; an M-shaped track 111 is installed on its lower surface. The M-shaped track 111 is fitted with a reaction plate bracket 113; and steel track pads 112 are installed on the top crossbeam and on the side facing the support arm 105. During operation, the low- and medium-speed maglev trains achieve controllable mechanical braking through friction between the mechanical brake device 110 and the steel pads 112 on the sides of the track 114.

[0054] In operation, when electromagnet winding 109 is energized, a magnetic field is generated on electromagnet core 108, which aligns with the M-shaped track 111 on track 114, generating a levitation force that enables the train to levitate. When the train negotiates a curve, the misalignment between electromagnet core 108 and M-shaped track 111 creates a component of the levitation force, guiding the vehicle. The specific force distribution is shown in Figure 3. The force distribution when the train traverses a straight line is shown in Figure 2.

[0055] When traction motor stator 104 is energized, it interacts with the aluminum induction plate on track 114, driving the medium- and low-speed maglev train forward. An insulating layer is provided between the aluminum induction plate on track 114 and the reaction plate bracket 113 of the M-shaped track 111 to prevent the suspension magnetic channel and the traction magnetic channel from interfering with each other.

[0056] The medium- and low-speed maglev train provided by the embodiment of the present invention uses the suspension frame provided by the above embodiment to reduce the suspension energy consumption of the medium- and low-speed maglev train. Of course, the medium- and low-speed maglev train provided by this embodiment also has other effects related to the suspension frame provided by the above embodiment, which will not be repeated here.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0058] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A suspension frame, characterized in that: include: Framework; A support arm, the top end of which is fixed to the end of the frame, and the support arm is located below the frame; An electromagnet box beam, the electromagnet box beam being mounted on the bottom end of the support arm; the electromagnet box beam being equipped with a suspension electromagnet; A traction motor stator is embedded in the suspension electromagnet.

2. The suspension frame according to claim 1, characterized in that: The traction motor stator comprises: An electromagnet core, the electromagnet core comprising a first end, a middle portion, and a second end connected in sequence, the first end, the middle portion, and the second end forming a groove; the traction motor stator is assembled in the groove; The electromagnet winding is wound around the end of the electromagnet core.

3. The suspension frame according to claim 2, characterized in that: It also includes a water cooling plate, which is fixedly connected to the traction motor stator and / or the suspension electromagnet and fits with the traction motor stator and / or the suspension electromagnet.

4. The suspension frame according to claim 3, characterized in that: The water cooling plate is sandwiched between the middle portion and the traction motor stator.

5. The suspension frame according to claim 1, characterized in that: The upper surface of the traction motor stator is coplanar with the upper surface of the electromagnet core; the upper surface of the electromagnet core includes an end surface of the first end facing away from the middle part, and an end surface of the second end facing away from the middle part.

6. The suspension frame according to claim 1, characterized in that: A skid is fixed to the frame, and the frame is also provided with emergency rescue wheels that can be raised and lowered.

7. The suspension frame according to claim 6, characterized in that: The emergency rescue wheel is mounted on the frame via a hydraulic device.

8. The suspension frame according to claim 6, characterized in that: The emergency rescue wheels and the slide are arranged along a preset direction; the preset direction is perpendicular to the direction from one end to the other end of the supporting arm.

9. The suspension frame according to claim 1, characterized in that: The frame connected to the support arm and the electromagnet box beam are both located on the same side of the support arm.

10. A medium-low speed maglev train, comprising a car body and a suspension frame installed under the car body, characterized in that: The suspension frame is the suspension frame described in any one of claims 1 to 9.

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