CN208325212U - A kind of duct type magnetic suspension train - Google Patents

A kind of duct type magnetic suspension train Download PDF

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Publication number
CN208325212U
CN208325212U CN201820959976.5U CN201820959976U CN208325212U CN 208325212 U CN208325212 U CN 208325212U CN 201820959976 U CN201820959976 U CN 201820959976U CN 208325212 U CN208325212 U CN 208325212U
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China
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magnetic
kickboard
floating
train
dynamic
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Withdrawn - After Issue
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CN201820959976.5U
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Chinese (zh)
Inventor
葛研军
杨均悦
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Dalian Jiaotong University
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Dalian Jiaotong University
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Priority to CN201820959976.5U priority Critical patent/CN208325212U/en
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Abstract

The utility model discloses a kind of duct type magnetic suspension trains, including levitation device, guiding device, driving device, running gear, current collecting equipment and plumbing installation.Levitation device is by lower dynamic magnetic floating body and lower determine magnetic kickboard and forms;Guiding device determines magnetic kickboard, right dynamic magnetic floating body and the right side by left dynamic magnetic floating body, a left side and determines magnetic kickboard and form;Driving device includes stator and rotor permanent magnet;Running gear is made of left guide wheel, left rail, right guide wheel and right guide rail;Plumbing installation is made of pipeline, left framework, right framework, top frame and wheel track support rim.The utility model uses passive type suspension technology, is formed by magnetic field repulsive force merely with lower dynamic magnetic floating body and the lower relative motion determined between magnetic kickboard and train is made to suspend, and realizes the suspension of self-stabilization formula;The utility model is not necessarily to the control system of complex and expensive, as long as the coil windings electric current in control stator;Current Control Technology in the utility model stator is mature and price also relative moderate.

Description

A kind of duct type magnetic suspension train
Technical field
The utility model relates to a kind of magnetic suspension train, especially a kind of duct type magnetic suspension train.
Background technique
Super high-speed rail is a kind of vehicles with " vacuum steel pipe transmission " for theory, has ultrahigh speed, high safety, low energy The features such as consumption, noise are small, pollution is small.
Tesla of Vehicules Electr Sas Soc D. of the U.S. and scientific & technical corporation of U.S. ET3 disclose " vacuum steel pipe transmission " meter at present It draws, tesla is named as " super high-speed rail ", and ET3 is referred to as " eating capsule " train because train is exactly like capsule in appearance.
Duct type magnetic suspension train " floating " is in the pipeline in vacuum, due to running space vacuum, without frictional force, The speed of service of train is highest possible to reach 5000 kilometers or more per hour.
Existing magnetic suspension train is generally divided into routine conductive maglev train, low-temperature superconducting magnetic suspension train and high-temperature superconductor magnetic Three kinds of aerotrain etc..
Existing magnetic suspension train, which is not suitable for the main reason for vacuum pipeline type train, the following:
(1) control system error probability is big: either often lead or levitated superconducting magnet train must have it is a set of it is complicated, Expensive suspension and guiding control unit just can guarantee the stable suspersion of system.Since control component and controlling unit are more, lead Cause error probability big, and the error of any one link, the train for being likely to result in the high-speed cruising in vacuum pipe occur Catastrophic failure;
(2) car body is from great, and payload is low: a large amount of vehicle mounted electric magnet, super-conductive magnetic suspension on routine conductive maglev train Complicated huge low-temperature circulating system on train, and be system storage or the Dewar tank of transport liquid nitrogen, lead to car body From great, payload is low, is not suitable for train high speed or ultrahigh speed operation in vacuum pipe;
(3) existing levitated superconducting magnet train is easy to cause electromagnetic pollution to compartment there are highfield;
(4) existing magnetic suspension train braking system is complex, is generally divided into service braking, emergency braking and quickly makes Dynamic equal three kinds of common types, mode of braking also there are mainly three types of: regenerative braking, eddy-current brake and solution-air switching brake;Its Middle service braking, fast braking preferentially use regenerative braking, when regenerative braking force deficiency, using air-hydraulic conversion system Dynamic to be supplemented, emergency braking is generally only with air-hydraulic conversion mode of braking;Above-mentioned mode of braking, be only applicable in, The braking of low speed magnetic suspension train, and it is not suitable for high speed or the magnetic suspension train of ultrahigh speed operation in vacuum pipe.
Utility model content
In order to solve the above problems existing in the present technology, the utility model will propose a kind of duct type magnetic suspension train, The magnetic suspension train is passive type suspension, and with control system, simple, car body greatly, does not almost have compartment from heavy and light, payload Self-stability is good when having the advantages that any electromagnetic pollution, suspending, suspends and brake integration.
In order to achieve the above objectives, the utility model adopts the following technical solution:
A kind of duct type magnetic suspension train, including levitation device, guiding device, driving device, running gear, current collecting equipment And plumbing installation.
The levitation device is by lower dynamic magnetic floating body and lower determine magnetic kickboard and forms;The lower dynamic magnetic floating body is along train operation Direction is mounted on the bottom of train cabinet;It is described lower to determine magnetic kickboard and be mounted on wheel track support rim.
The guiding device determines magnetic kickboard, right dynamic magnetic floating body and the right side by left dynamic magnetic floating body, a left side and determines magnetic kickboard and form;It is described A left side move magnetic floating body and be mounted on the upper left corner area of train cabinet along current of traffic;Determine magnetic kickboard and be mounted on pipe in the left side On left framework in road;It the left side moves magnetic floating body and left determines between magnetic kickboard that there are one layer of uniform gaps;Move magnetic in the right side Floating body is mounted on the upper right comer region of train cabinet along current of traffic;Determine the right side of magnetic kickboard installation in the duct in the right side On framework;It the right side moves magnetic floating body and right determines between magnetic kickboard that there are one layer of uniform gaps;Determine magnetic kickboard and the right side in the left side It is uniformly distributed along train operation route to determine magnetic kickboard.
It is described lower to determine magnetic kickboard, left determine magnetic kickboard to determine the material of magnetic kickboard with the right side to be nonferromagnetic conductor material.
Lower dynamic magnetic floating body, left dynamic magnetic floating body and the right material for moving magnetic floating body is permanent magnet blocks;
The permanent magnet blocks are with the installation of the pole N, S staggered pattern.
The driving device includes stator and rotor permanent magnet;The stator is by iron core and is wrapped in around iron core Coil windings composition;The stator is mounted on the top frame of pipeline;Fortune of the rotor permanent magnet along train cabinet Line direction is mounted on the top area of train cabinet with the pole N, S staggered pattern;Between the rotor permanent magnet and stator There are one layer of uniform gaps.
The running gear is made of left guide wheel, left rail, right guide wheel and right guide rail;The left guide wheel is along left rail Rolling-operation;The left rail is mounted on wheel track support rim;The right guide wheel is along right guide rail rolling-operation;Described Right guide rail is mounted on wheel track support rim.
The current collecting equipment is mounted on the top of train cabinet, is made of conductor coils.
The plumbing installation is made of pipeline, left framework, right framework, top frame and wheel track support rim;Described The cross section of pipeline is round or round and rectangular composite structure;Described left framework one end is mounted on the upper left side of pipeline On inner wall, the other end is determined magnetic kickboard with a left side and is connected firmly;Described right framework one end is mounted on the upper right side inner wall of pipeline, the other end Determine magnetic kickboard with the right side to connect firmly;Described top frame one end is mounted in pipeline top inner wall, and the other end is connected firmly with stator;It is described The bottom of wheel track support rim be mounted on the bottom of pipeline, top be equipped with it is lower determine magnetic kickboard, left end is equipped with left rail, right End is equipped with right guide rail.
Further, the permanent magnet blocks are all made of Halbach structure.
Further, it is described it is lower determine magnetic kickboard, it is left determine magnetic kickboard and replaced with the right material for determining magnetic kickboard with permanent magnet blocks, Lower dynamic magnetic floating body, left dynamic magnetic floating body and the right material for moving magnetic floating body is replaced with nonferromagnetic good conductor.
The utility model has following obvious prominent substantive distinguishing features and shows compared with existing magnetic suspension train Write advantage:
1, the utility model control system is simple, the control system without complex and expensive needed for existing magnetic suspension train. The utility model uses passive type suspension technology, merely with lower dynamic magnetic floating body and lower determine the relative motion between magnetic kickboard and is formed Magnetic field repulsive force and so that train is suspended, and the speed of service of train is faster, lower dynamic magnetic floating body and lower determines between magnetic kickboard Slippage it is bigger, it is also bigger to be formed by suspension repulsion after interaction, therefore the utility model is that self-stabilization formula suspends;Only Wanting train running speed to reach its critical floating speed (generally 20km/h) can produce suspension, and when being lower than the speed, column Box body is supported by left support wheel and right support wheel, is run in a manner of roll-sliding, therefore the utility model is not necessarily to complex and expensive Control system, as long as control stator in coil windings electric current;When coil windings electric current increases, the drive of train acquisition Power increases, and the speed of service is accelerated, and lower dynamic magnetic floating body and the lower slippage determined between magnetic kickboard increase, the reprimand of suspension suffered by train Power also increases therewith, and hoverheight increases;Vice versa.
2, the utility model can combine suspension function and braking function together.The mode of braking and suspension of the utility model Mechanism is identical, also utilizes lower dynamic magnetic floating body with lower and determines generated vortex of inducting when magnetic kickboard interacts, when in stator When coil windings electric current reduces, the driving force of train is also reduced, the speed of service of train reduces, lower dynamic magnetic floating body with it is lower fixed Slippage between magnetic kickboard will reduce, this determines the levitation gap of magnetic kickboard and lower dynamic magnetic floating body at present and lower determine magnetic kickboard and generated Suspension repulsion will reduce, this active force determined between magnetic kickboard and lower dynamic magnetic floating body at present is mainly eddy resistance, this shape The lower method of operation determined between magnetic kickboard and lower dynamic magnetic floating body and the mechanism of action under state is identical as existing eddy-current brake principle.
3, when to sum up, the suspension of the utility model and braking mechanism are utilized dynamic magnetic floating body and determine the interaction of magnetic kickboard Intrinsic essential characteristics.Compared with existing magnetic suspension train, the utility model has electromechanical structure simple, control system Structure is unitary formula control (only controlling the driving current in stator), eliminates existing magnetic suspension train technical difficulty most Greatly, cost is also with respect to control system the most expensive;And the Current Control Technology in stator is identical as existing linear motor, skill Art is mature and price also relative moderate.
Detailed description of the invention
Fig. 1 is the horizontal cross-section structure diagram of the utility model.
Fig. 2 is the A-A the schematic diagram of the section structure of Fig. 1.
In figure: 1, magnetic kickboard, 2, right dynamic magnetic floating body, 3, stator, 4, rotor permanent magnet, 5, left dynamic magnetic floating body, 6, a left side are determined in the right side Determine magnetic kickboard, 7, left guide wheel, 8, left rail, 9, wheel track support rim, 10, it is lower determine magnetic kickboard, 11, right guide wheel, 12, right guide rail, 13, lower dynamic magnetic floating body, 14, train cabinet, 15, pipeline, 16, right framework, 17, top frame, 18, left framework, 19, conductor lines Circle.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.As shown in Figs. 1-2, a kind of duct type magnetic suspension column Vehicle, including levitation device, guiding device, driving device, running gear, current collecting equipment and plumbing installation.
The levitation device is by lower dynamic magnetic floating body 13 and lower determine magnetic kickboard 10 and forms;Described lower dynamic magnetic floating body 13 is along column Vehicle traffic direction is mounted on the bottom of train cabinet 14;It is described lower to determine magnetic kickboard 10 and be mounted on wheel track support rim 9.
The guiding device determines magnetic kickboard 6, right dynamic magnetic floating body 2 and the right side by left dynamic magnetic floating body 5, a left side and determines magnetic kickboard 1 and form; Move the upper left corner area that magnetic floating body 5 is mounted on train cabinet 14 along current of traffic in the left side;Determine magnetic kickboard 6 in the left side It is mounted on the left framework 18 in pipeline 15;The left side move magnetic floating body 5 and it is left determine between magnetic kickboard 6 there are one layer it is uniform between Gap;Move the upper right comer region that magnetic floating body 2 is mounted on train cabinet 14 along current of traffic in the right side;It is floating that magnetic is determined on the right side Plate 1 is mounted on the right framework 16 in pipeline 15;The dynamic magnetic floating body 2 in the right side and the right side are determined uniform there are one layer between magnetic kickboard 1 Gap;Magnetic kickboard 6 is determined on the left side and the right side is determined magnetic kickboard 1 and is evenly distributed with along train operation route.
It is described lower to determine magnetic kickboard 10, left determine magnetic kickboard 6 to determine the material of magnetic kickboard 1 with the right side to be nonferromagnetic conductor material Material.
Lower dynamic magnetic floating body 13, left dynamic magnetic floating body 5 and the right material for moving magnetic floating body 2 is permanent magnet blocks;
The permanent magnet blocks are with the installation of the pole N, S staggered pattern.
The driving device includes stator 3 and rotor permanent magnet 4;The stator 3 is by iron core and is wrapped in iron core week The coil windings composition enclosed;The stator 3 is mounted on the top frame 17 of pipeline 15;The rotor permanent magnet 4 is along column The traffic direction of box body 14 is mounted on the top area of train cabinet 14 with the pole N, S staggered pattern;The mover is forever There are one layer of uniform gaps between magnet 4 and stator 3.
The running gear is made of left guide wheel 7, left rail 8, right guide wheel 11 and right guide rail 12;The left guide wheel 7 Along 8 rolling-operation of left rail;The left rail 8 is mounted on wheel track support rim 9;The right guide wheel 11 is along right guide rail 12 Rolling-operation;The right guide rail 12 is mounted on wheel track support rim 9.
The current collecting equipment is mounted on the top of train cabinet 14, is made of conductor coils 19.
The plumbing installation is by pipeline 15, left framework 18, right framework 16, top frame 17 and 9 groups of wheel track support rim At;The cross section of the pipeline 15 is round or round and rectangular composite structure;18 one end of left framework installation On the upper left side inner wall of pipeline 15, the other end is determined magnetic kickboard 6 with a left side and is connected firmly;Described 16 one end of right framework is mounted on pipeline 15 Upper right side inner wall on, the other end is determined magnetic kickboard 1 and is connected firmly with the right side;Described 17 one end of top frame is mounted in 15 top of pipeline On wall, the other end is connected firmly with stator 3;The bottom of the wheel track support rim 9 is mounted on the bottom of pipeline 15, and top is equipped with Magnetic kickboard 10 is determined down, and left end is equipped with left rail 8, and right end is equipped with right guide rail 12.
Further, the permanent magnet blocks are all made of Halbach structure.
Further, described lower to determine magnetic kickboard 10, the left material permanent magnet blocks determine magnetic kickboard 6 and determine magnetic kickboard 1 with the right side Instead of the material of the lower dynamic magnetic floating body 13, left dynamic magnetic floating body 5 and right dynamic magnetic floating body 2 is replaced with nonferromagnetic good conductor.
The working principle of the utility model is as follows:
Coil windings in stator 3 in driving device are powered, and driving is mounted on the mover permanent magnetism at 14 top of train cabinet Body 4 runs along left rail 8 and right guide rail 12 by left guide wheel 7 and right guide wheel 11, lower dynamic magnetic floating body 13 is made to determine magnetic kickboard 10 with lower Between generate slippage, and determine to generate vortex of inducting in magnetic kickboard 10 lower;The vortex of inducting is determined in magnetic kickboard 10 lower in three-dimensional Distribution increases wherein the vortex being distributed in the lower cross section for determining magnetic kickboard 10 plays drag effect to the operating status of train The running resistance and energy loss of train, the resistance are electromagnetic resistance;And opposite with lower dynamic magnetic floating body 13 lower determine magnetic kickboard The vortex of inducting of 10 surfaces distribution then generates repulsion to lower dynamic magnetic floating body 13, which is suspending power;The size of suspending power with The being positively correlated property of the speed of service of train, i.e. train running speed is higher, and generated suspending power is bigger;Conversely, then smaller.
It is lower to determine suspending power caused by magnetic kickboard 10 and be not enough to support column box body 14 when train running speed is lower, Train cabinet 14 is supported by left support wheel 7 and right support wheel 11 at this time, is run in a manner of roll-sliding, this determines magnetic kickboard 10 at present Generated vortex of inducting is mainly that resistance, the form of expression and the mode of action are identical as existing train eddy-current brake principle; When train gradually accelerates the speed of service, lower dynamic magnetic floating body 13 and the lower slippage determined between magnetic kickboard 10 are gradually increased, lower to determine magnetic The kelvin effect of kickboard 10 gradually increases, and the lower vortex of inducting determined in magnetic kickboard 10 gradually tends to be opposite with lower dynamic magnetic floating body 13 Surface, the form of expression is suspending power increase, and electromagnetic resistance reduces;Train running speed is faster, lower dynamic magnetic floating body 13 with it is lower fixed Slippage between magnetic kickboard 10 is bigger, and kelvin effect is stronger, lower to determine magnetic kickboard 10 to suspending power caused by lower dynamic magnetic floating body 13 Also bigger, levitation gap is also bigger, and electromagnetic resistance suffered by lower dynamic magnetic floating body 13 is smaller, and therefore, the utility model is applicable in high speed Or superfast duct type train.
When train needs to turn, for turning right, dynamic magnetic floating body 2 right at this time is increased with the right gap for determining magnetic kickboard 1, Lead to the right suspension repulsion reduction determined 1 pair of right side of magnetic kickboard and move magnetic floating body 2;And the gap that left dynamic magnetic floating body 5 determines magnetic kickboard 6 with a left side subtracts It is small, lead to the left suspension repulsion increasing determined 6 pairs of left sides of magnetic kickboard and move magnetic floating body 5;Train is forced to bend to right operation;Conversely, to the left Turning.
When train needs to brake, the coil windings electric current that can be gradually reduced in stator 3, make driving force suffered by train by Decrescence small, the speed of service of train gradually becomes smaller at this time, and lower dynamic magnetic floating body 13 and the lower slippage determined between magnetic kickboard 10 are also gradually Reduce, the lower kelvin effect for determining magnetic kickboard 10 gradually dies down, and electromagnetic resistance suffered by train is gradually increased at this time;It is repeated Operation is stated, electromagnetic resistance suffered by train can be made increasing, until suspension of service.
When train needs emergency stop, control for brake, while train cabinet 14 can be carried out to the coil windings electric current in stator 3 Coil windings in 4 cutting stator 3 of rotor permanent magnet at top, make the coil windings in stator 3 be in generating state, and lower fixed Magnetic kickboard 10, a left side determine magnetic kickboard 6 and the right side is determined magnetic kickboard 1 and located with lower dynamic magnetic floating body 13, left dynamic magnetic floating body 5 and the right magnetic floating body 2 that moves In eddy-current brake state, under this collective effect, train can be made to stop quickly in a short time.
Train in the process of moving, due to the construction error of left rail 8, right guide rail 12, and determines magnetic kickboard 10 under installing When existing seam between each other, therefore train especially reaches its critical floating speed in the speed of service of train during operation When spending, train cabinet 14 can generate more strong vibration, and it is floating that a left side is determined between magnetic kickboard 6 and left dynamic magnetic floating body 5 at this time, magnetic is determined on the right side Between plate 1 and right dynamic magnetic floating body 2, it is lower determine that vortex of inducting will be interacted and generated between magnetic kickboard 10 and lower dynamic magnetic floating body 13, The vibrational energy of train cabinet 14 can be converted to joule loss by the vortex of inducting, and be consumed vibrational energy in the form of thermal energy Fall, i.e., the utility model can integrally carry out vibration suppression to train.
The current collecting equipment for being mounted on 14 top of train cabinet is made of conductor coils 19.When train operation in current collecting equipment The magnetic line of force caused by coil windings in 19 cutting stator 3 of conductor coils, and induced current is generated in conductor coils 19, with This gives train power supply;When train stops, stator 3 can be by the working method of high frequency transformer to train power supply.Above-mentioned institute Having energy transmission is non-contact type linear transformer induction type power supplying.
The utility model is not limited to the present embodiment, any equivalent concepts in the technical scope that the utility model discloses Or change, it is classified as the protection scope of the utility model.

Claims (3)

1. a kind of duct type magnetic suspension train, it is characterised in that: including levitation device, guiding device, driving device, operation dress It sets, current collecting equipment and plumbing installation;
The levitation device is by lower dynamic magnetic floating body (13) and lower determine magnetic kickboard (10) and forms;Lower dynamic magnetic floating body (13) edge Current of traffic is mounted on the bottom of train cabinet (14);It is described lower to determine magnetic kickboard (10) and be mounted on wheel track support rim (9) on;
The guiding device determines magnetic kickboard (6), right dynamic magnetic floating body (2) and the right side by left dynamic magnetic floating body (5), a left side and determines magnetic kickboard (1) Composition;Move the upper left corner area that magnetic floating body (5) are mounted on train cabinet (14) along current of traffic in the left side;The left side Determine on the left framework (18) that magnetic kickboard (6) is mounted in pipeline (15);Magnetic floating body (5) are moved on the left side and magnetic kickboard (6) are determined on a left side Between there are one layer of uniform gaps;Move the right side that magnetic floating body (2) are mounted on train cabinet (14) along current of traffic in the right side Upper angular zone;Determine on the right framework (16) that magnetic kickboard (1) is mounted in pipeline (15) on the right side;Move magnetic floating body in the right side (2) and right determine between magnetic kickboard (1) that there are one layer of uniform gaps;Magnetic kickboard (6) are determined on the left side and magnetic kickboard (1) is determined along column in the right side Vehicle working line is uniformly distributed;
It is described lower to determine magnetic kickboard (10), left determine magnetic kickboard (6) to determine the material of magnetic kickboard (1) with the right side to be nonferromagnetic conductor material Material;
The lower dynamic magnetic floating body (13), left dynamic magnetic floating body (5) and the right material for moving magnetic floating body (2) are permanent magnet blocks;
The permanent magnet blocks are with the installation of the pole N, S staggered pattern;
The driving device includes stator (3) and rotor permanent magnet (4);The stator (3) by iron core and is wrapped in iron core The coil windings composition of surrounding;The stator (3) is mounted on the top frame (17) of pipeline (15);The mover permanent magnetism Body (4) is mounted on the pole N, S staggered pattern the top area of train cabinet (14) along the traffic direction of train cabinet (14); There are one layer of uniform gaps between the rotor permanent magnet (4) and stator (3);
The running gear is made of left guide wheel (7), left rail (8), right guide wheel (11) and right guide rail (12);It leads on the left side (7) are taken turns along left rail (8) rolling-operation;The left rail (8) is mounted on wheel track support rim (9);The right guide wheel (11) along right guide rail (12) rolling-operation;The right guide rail (12) is mounted on wheel track support rim (9);
The current collecting equipment is mounted on the top of train cabinet (14), is made of conductor coils (19);
The plumbing installation is by pipeline (15), left framework (18), right framework (16), top frame (17) and wheel track support rim (9) it forms;The cross section of the pipeline (15) is round or round and rectangular composite structure;The left framework (18) One end is mounted on the upper left side inner wall of pipeline (15), and the other end is determined magnetic kickboard (6) with a left side and connected firmly;The right framework (16) one End is mounted on the upper right side inner wall of pipeline (15), and the other end is determined magnetic kickboard (1) with the right side and connected firmly;The top frame (17) one End is mounted in pipeline (15) top inner wall, and the other end is connected firmly with stator (3);Pacify the bottom of the wheel track support rim (9) Mounted in the bottom of pipeline (15), top be equipped with it is lower determine magnetic kickboard (10), left end is equipped with left rail (8), and right end is equipped with the right side Guide rail (12).
2. a kind of duct type magnetic suspension train according to claim 1, it is characterised in that: the permanent magnet blocks are all made of Halbach structure.
3. a kind of duct type magnetic suspension train according to claim 1 or 2, it is characterised in that: described lower to determine magnetic kickboard (10), the material that a left side determines that magnetic kickboard (6) determines magnetic kickboard (1) with the right side is replaced with permanent magnet blocks, the lower dynamic magnetic floating body (13), a left side The material of dynamic magnetic floating body (5) and right dynamic magnetic floating body (2) is replaced with nonferromagnetic good conductor.
CN201820959976.5U 2018-06-21 2018-06-21 A kind of duct type magnetic suspension train Withdrawn - After Issue CN208325212U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108706013A (en) * 2018-06-21 2018-10-26 大连交通大学 A kind of duct type magnetic suspension train

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108706013A (en) * 2018-06-21 2018-10-26 大连交通大学 A kind of duct type magnetic suspension train

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