CN211494032U - Linear electric motor drive and mixed electromagnetism subtract heavy suspension type train - Google Patents

Linear electric motor drive and mixed electromagnetism subtract heavy suspension type train Download PDF

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Publication number
CN211494032U
CN211494032U CN201922042818.0U CN201922042818U CN211494032U CN 211494032 U CN211494032 U CN 211494032U CN 201922042818 U CN201922042818 U CN 201922042818U CN 211494032 U CN211494032 U CN 211494032U
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linear motor
electromagnet
bogie
weight
reducing
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CN201922042818.0U
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皇甫贵田
李俊叶
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Shanxi Zhonghai Weiwei Rail Transit Engineering Co ltd
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Shanxi Zhonghai Weiwei Rail Transit Engineering Co ltd
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Abstract

The utility model discloses a suspension train driven by a linear motor and lightened by mixed electromagnetism, which comprises a carriage body and more than two bogies sleeved in the carriage body, wherein the two adjacent bogies are respectively connected to a connecting flat plate through rotating shafts; a linear motor secondary aluminum plate is arranged below the carriage top plate, and a linear motor primary is arranged above the connecting flat plate; a mixed weight-reducing electromagnet and a mixed weight-reducing electromagnet air gap sensor are arranged above each bogie; a wheel shaft is arranged below each bogie, and wheels are respectively sleeved at two ends of each wheel shaft; the lower part of each bogie is also respectively suspended with a vehicle body through a connecting rod; the hybrid weight-reducing electromagnet control system further comprises a hybrid weight-reducing electromagnet controller and a linear motor controller which are arranged in the bogie. The beneficial effects of the utility model reside in that, can effectively reduce the energy consumption of system, reduce the operation cost of system, effectively improve the performance of suspension type train.

Description

Linear electric motor drive and mixed electromagnetism subtract heavy suspension type train
Technical Field
The utility model relates to a track traffic technical field, in particular to linear electric motor drive and mixed electromagnetism subtract heavy suspension type train.
Background
The suspension type suspension weight-reducing train is a new-type rail vehicle, is a good supplement to the existing urban traffic system as an urban rail traffic, has low construction cost and small construction using area, and can be used after being constructed in a short time. Based on the advantages, in urban traffic, most of the existing three-dimensional traffic is overhead vertical traffic, and the suspension type suspension train has a remarkable effect on the three-dimensional traffic. The suspended train mode meets the requirement, and can be well served in urban traffic.
At present, because a suspension type train belongs to urban traffic ranks and can reduce noise, a rubber wheel advancing mode is mostly adopted. In actual operation, the only contact between the wheels and the track can bear the whole bearing of the train, the traction force is carried out in a mode of rubbing the ground by the wheel periphery, the larger the gravity is, the larger the friction force of the wheels is, the more serious the abrasion of the wheels is, and the maintenance and operation cost is increased. The traction mode adopts an electric transmission traction mode. The traditional traction method is to provide traction by friction between the wheel and the rail, with maximum adhesion limits.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a linear electric motor drives and mixed electromagnetism subtracts heavy suspension type train.
Realize the utility model discloses the technical scheme of purpose does:
a suspension type train driven by a linear motor and realizing weight reduction by mixed electromagnetism comprises a carriage body and more than two bogies sleeved in the carriage body, wherein the two adjacent bogies are respectively connected to a connecting flat plate through rotating shafts; a linear motor secondary aluminum plate is arranged below the carriage top plate, and a linear motor primary is arranged above the connecting flat plate; a mixed weight-reducing electromagnet and a mixed weight-reducing electromagnet air gap sensor are arranged above each bogie; a wheel shaft is arranged below each bogie, and wheels are respectively sleeved at two ends of each wheel shaft; the lower part of each bogie is also respectively suspended with a vehicle body through a connecting rod; the hybrid weight-reducing electromagnet control system further comprises a hybrid weight-reducing electromagnet controller and a linear motor controller which are arranged in the bogie.
Furthermore, the left side and the right side of the bogie or the connecting flat plate are respectively provided with a guiding electromagnet and a guiding electromagnet gap sensor, and the device also comprises a guiding electromagnet controller arranged inside the bogie.
The beneficial effects of the utility model reside in that, can effectively reduce the energy consumption of system, reduce the operation cost of system, effectively improve the performance of suspension type train.
Drawings
Fig. 1 is a side view of the overall structure of the system.
Fig. 2 is a front view of the overall structure of the system.
Fig. 3 is a schematic cross-sectional view of a hybrid weight-reducing electromagnet.
Fig. 4 is a schematic view of a bogie attachment.
Fig. 5 is a schematic view of a linear motor.
Fig. 6 is a schematic view of a pilot electromagnet.
Labeled as: the hybrid weight-reducing electromagnet comprises a hybrid weight-reducing electromagnet 100, a hybrid weight-reducing electromagnet controller 101, a hybrid weight-reducing electromagnet air gap sensor 102, a hybrid weight-reducing electromagnet permanent magnet 103, a hybrid weight-reducing electromagnet magnetic pole 104, a hybrid weight-reducing electromagnet enameled wire package 105, a linear motor primary 200, a linear motor secondary aluminum plate 201, a linear motor controller 202, a linear motor primary winding 203, a linear motor primary iron core 204, a guide electromagnet 300, a guide electromagnet controller 301, a guide electromagnet gap sensor 302, a guide electromagnet magnetic pole 303, a guide electromagnet enameled wire package 304, a rail surface 3, a carriage body 4, a bogie 5, wheels 6, a vehicle body 7, a rotating shaft 8 and a connecting flat plate 9.
Detailed Description
In magnetic suspension traffic, zero contact between a train and a track is realized in a magnetic suspension mode. The invention uses magnetic suspension for reference, reduces the positive pressure between the rubber wheel and the track by a suspension weight reduction mode, realizes the reduction of mechanical impact and frictional resistance borne by the rubber wheel, achieves the purpose of prolonging the service life of the rubber wheel, and is suitable for low-speed traffic. The invention also adopts a linear motor driving mode.
Specific examples are as follows:
as shown in fig. 1, the system includes a hybrid weight-loss electromagnet 100, a hybrid weight-loss electromagnet air gap sensor 102, and a hybrid weight-loss electromagnet controller 101. The hybrid weight-reducing electromagnet 100 is fixed on the upper part of a bogie 5 of the suspension train, has a certain gap with the top and the side of the carriage body 4, and the distance between the side is selected to be a proper distance to prevent the magnetic leakage of the side, and the magnetic attraction is acted on the top of the carriage body 4 as much as possible to offset the gravity. The hybrid weight-reduction electromagnet air gap sensor 102 is arranged at a position flush with the magnetic pole of the electromagnet so as to detect the distance between the magnetic pole and the upper part of the carriage body. The linear motor primary 200 is arranged on the upper part of the connecting flat plate 9 between the two bogies 5, and the linear motor secondary aluminum plate 201 is arranged on the carriage body and is positioned right above the primary. The guiding electromagnet 300 is located on the side of the bogie 5 or the connection plate 9, and the guiding electromagnet gap sensor 302 is also located there. The hybrid weight loss solenoid controller 101, the linear motor controller 202, and the guidance solenoid controller 301 are in the controller compartment.
Above the primary 200 of the linear motor is a secondary aluminum plate 201 of the linear motor, and the width of the secondary aluminum plate should be larger than that of the primary. The linear motor and the hybrid weight-reducing electromagnets 100 are distributed at intervals, and the length of the stator is longer as far as possible under the condition of meeting the weight reduction, so that the side end effect of the motor is reduced. The guiding electromagnet 300 is installed at a side of the bogie 5 or the connection plate 9 and functions when the bogie 5 touches the car body 4. Meanwhile, in order to avoid collision between the hybrid weight-reducing electromagnet and the carriage body 4, a hybrid weight-reducing electromagnet air gap sensor 102 is installed at a position flush with the magnetic pole of the hybrid weight-reducing electromagnet 100.
The front view of the train is shown in fig. 2, and the hybrid weight-reducing electromagnets 100 and the linear motors are positioned in the same direction and distributed at intervals.
The composition of the hybrid weight-reducing electromagnet 100 is shown in fig. 3. The hybrid weight-reducing electromagnet 100 is composed of three parts, including a permanent magnet, a magnetic pole, and a coil composed of enameled copper wires. The magnetic poles are in a shape of Chinese character 'shan', the permanent magnet is positioned at the center of the Chinese character 'shan', and the magnetic pole at the center of the Chinese character 'shan' is shorter than the magnetic poles at two ends because of the influence of the secondary aluminum plate 201 of the linear motor. The permanent magnet can provide permanent attraction force and reduce electromagnetic attraction force. But the volume of the permanent magnet is calculated according to the weight of the vehicle body.
The hybrid weight-reducing electromagnet has the significance of reducing the pressure of a train body and the whole train structure on a track surface, and is particularly divided into two modes, wherein one mode is a fixed weight-reducing mode, and the permanent magnet structure can provide a part of fixed suction force due to the adoption of the hybrid weight-reducing mode. In the same way, a fixed current is passed through the electromagnetic structure, which generates a fixed attraction force. The advantages are that the control mode is simple and stable, and is not influenced by external factors such as speed. Specifically, under a fixed current, the hybrid weight-reduction electromagnet generates a fixed electromagnetic attraction force, the fixed electromagnetic attraction force is coupled with the carriage body to generate a pulling force of the carriage body on the hybrid weight-reduction electromagnet, the carriage body is connected with the ground through a mechanical structure, the electromagnet is positioned on a bogie of the train, and the bogie is connected with the train. Thereby reducing the pressure of the vehicle body on the track surface. And secondly, a controller of the hybrid electromagnet incorporates a speed factor, and different currents are supplied at different speeds to provide electromagnetic attraction through simulation with a traction curve.
Conventional electric traction methods, which generate traction by friction between the wheel rim and the ground, are limited by adhesion. The driving mode of the linear motor can get rid of the limitation, and the driving mode is simpler. Specifically, the structure of the invention adopts a short stator induction type linear motor, and the motion mode of the induction linear motor is a mode of changing the rotary motion of the traditional asynchronous motor into linear motion. In order to reduce the influence of the end effect of the linear motor, the stator structure of the linear motor is adopted as long as possible, the stator of the linear motor is positioned on the connecting flat plate between the bogies, and the length of the stator is equivalent to that of the connecting flat plate. The linear motor secondary is fixedly installed at a position above the carriage body and parallel to the linear motor primary, the fixing device of the linear motor adopts a mechanical decoupling mode, the specific implementation mode is shown in figure 4, the connecting flat plate 9 is located between the bogies 5 and is connected with the two bogies, and the rotating shaft 8 realizes mechanical decoupling, so that the steering of the train is facilitated. Namely, when the path is met with a certain curvature, the linear motor cannot be deformed due to the structure of the linear motor, and mechanical decoupling is realized through a mechanical structure between the bogies. The traditional electric traction train has a complex traction structure, and the structure of the linear motor is beneficial to simplifying the traction structure.
The space structure of the primary linear motor and the hybrid electromagnet in the running direction of the train adopts a mode of being distributed at intervals, namely the space length of the stator is kept as much as possible after the weight reduction requirement of the train is met. After the hybrid electromagnet is subjected to weight reduction, the positive pressure of the train on the rail surface is reduced, and the friction resistance is reduced. When the linear motor is driven, the work done by overcoming the resistance is reduced.
The invention has the characteristics that the rubber wheel load can be effectively reduced, the service life of the rubber wheel is prolonged, the maintenance workload is reduced, the driving mode is improved, the traditional electric transmission traction mode is changed into a linear motor driving mode, the limitation of the adhesive force of the traditional electric traction is avoided, and the operation is more convenient.
Having set forth the various system components of the present invention and the spatial locations in which they are disposed, the manner in which the system operates is described in detail below. Firstly, the hybrid weight-reducing electromagnet 100 outputs a fixed current in the starting stage, and the current is determined according to the weight-reducing electromagnet air gap sensor 102 and the weight-reducing mass, namely the weight-reducing mass determined by adding feed-forward control to the control, and secondly, the real-time air gap feedback is added according to the result of mechanical installation to keep the stress point of the train or the track surface. The two are combined into one, and the weight-reducing electromagnet controller 101 completes the work. When the weight of the system is reduced, the driving system of the train is changed into the linear motor primary 200 and the linear motor secondary 201, and the linear motor current is completed by the linear motor controller 202 according to the required speed. When the train is turned, the train is turned by a turning electromagnet 300 system, a turning electromagnet air gap sensor 302 detects the distance between the train and the side wall of the carriage body to control the turning of the train, and meanwhile, due to the special condition of the installation of the linear motor of the structure, the mechanical decoupling can be carried out when the train is turned.
Referring to fig. 3, the hybrid weight-reducing electromagnet has a length of 650mm and a width of 200, and has 50mm on both sides and 100mm in the middle permanent magnet. The length of the magnetic poles on the two sides is 200mm, the cross section size of the copper wire filled in the electromagnet coil is 100mm x 100mm, and the filling rate of the copper wire in the electromagnet is selected to be 60%. The air gap was 8mm and the currents per square millimeter were chosen to be 0A, 0.4A,0.6A,0.8A,1A,1.2A,1.4A, respectively. The parameters of the linear motor comprise that the width of an asynchronous short stator linear motor iron core is 220mm, the pole distance is 216mm, the number of poles of the motor is 8, the length of the motor is 11604mm, the number of slots of each phase of each pole is 3, the total number of slots is 80, the air gap flux density is 0.18T, an equivalent air gap is 19.28mm, a winding material is copper, and the iron core is made of silicon steel sheets. The cross-sectional dimension of the guide electromagnet is 150mm x 150mm, the plate thickness is 15mm, the length is 600mm, the material is Q235, the coil material is copper, the filling rate is 0.6, and the working air gap is 6 mm. The electromagnetic attraction between the weight-reducing electromagnet and the weight-reducing rail under the condition of the weight-reducing currents is obtained through finite element simulation analysis, and the electromagnetic attraction is shown in the table.
If the linear motor parameters and the guiding electromagnetic parameters are assumed, the finite element simulation result is as follows:
asynchronous short stator linear motor 30825N thrust.
The pilot electromagnet pilot force 15344N pilot force.
As can be seen from the parameters in the table above, the permanent magnet can provide 1029.49Kg of force, the hybrid electromagnet can reasonably save energy, the current can be fixed for the electromagnet, the fixed force can be obtained, and the linear motor can be used as a drive in operation.
In conclusion, the invention can effectively reduce the energy consumption of the system, reduce the operation cost of the system and effectively improve the performance of the suspension train.

Claims (2)

1. A suspension type train driven by a linear motor and reduced in weight by mixed electromagnetism is characterized by comprising a carriage body (4) and more than two bogies (5) sleeved in the carriage body (4), wherein the two adjacent bogies (5) are respectively connected to a connecting flat plate (9) through rotating shafts (8); a linear motor secondary aluminum plate (201) is arranged below a top plate of the carriage body (4), and a linear motor primary (200) is arranged above the connecting flat plate (9); a mixed weight-reducing electromagnet (100) and a mixed weight-reducing electromagnet air gap sensor (102) are arranged above each bogie (5); a wheel shaft is arranged below each bogie (5), and wheels (6) are respectively sleeved at two ends of the wheel shaft; the lower part of each bogie (5) is also respectively suspended with a vehicle body (7) through a connecting rod; the hybrid weight-reducing electromagnet control system further comprises a hybrid weight-reducing electromagnet controller (101) and a linear motor controller (202) which are arranged inside the bogie (5).
2. A suspended train with linear motor drive and hybrid electromagnetic weight reduction as claimed in claim 1, wherein the left and right sides of the bogie (5) or the connection plate (9) are further provided with a guidance electromagnet (300) and a guidance electromagnet gap sensor (302), respectively, and further comprising a guidance electromagnet controller (301) disposed inside the bogie (5).
CN201922042818.0U 2019-11-24 2019-11-24 Linear electric motor drive and mixed electromagnetism subtract heavy suspension type train Active CN211494032U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922042818.0U CN211494032U (en) 2019-11-24 2019-11-24 Linear electric motor drive and mixed electromagnetism subtract heavy suspension type train

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Application Number Priority Date Filing Date Title
CN201922042818.0U CN211494032U (en) 2019-11-24 2019-11-24 Linear electric motor drive and mixed electromagnetism subtract heavy suspension type train

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112277975A (en) * 2020-11-02 2021-01-29 西南交通大学 Suspension type train driven by bilateral linear motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112277975A (en) * 2020-11-02 2021-01-29 西南交通大学 Suspension type train driven by bilateral linear motor

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