Permanent magnet levitation train vibration test bed

Abstract

The application provides a vibration test bed for a permanent magnet levitation train. The vibration test bed comprises a base, a vertical excitation system, a permanent magnet track simulation system, a door-shaped support frame, a suspension platform, a lateral excitation system and a longitudinal excitation system. The application adjusts the position relationship between the suspension platform, the permanent magnet track simulation system and the levitation frame of the permanent magnet levitation train through the vertical excitation system, the lateral excitation system and the longitudinal excitation system, maintains the levitation state of the permanent magnet levitation train through the permanent magnet track simulation system, and simulates various working conditions such as track irregularities through the vertical excitation system and the lateral excitation system. The application can test the dynamic performance of the permanent magnet levitation train in the free levitation state, can also test the vehicle-track coupling dynamic performance, and has a wide application range.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of magnetic levitation trains, in particular to a permanent magnetic levitation train vibration test bench. BACKGROUND

[0002] The magnetic levitation train is operated without contact with the track by the repulsive force between the permanent magnets or between the induced magnetic field, thereby overcoming the friction and wear and mechanical noise of the traditional train wheels and rails. The permanent magnetic levitation train is one of the typical representatives of the magnetic levitation train technology, which realizes the suspension of the vehicle by the repulsive force between the permanent magnetic suspension module installed on the suspension frame and the permanent magnetic track installed in the track beam, and does not need to provide electric energy in the suspension process. Compared with other magnetic levitation trains, the permanent magnetic levitation train has the advantages of strong suspension force, good economic and safety performance, environmental protection and energy saving, lower energy consumption, and relatively simple structure.

[0003] The existing permanent magnetic levitation train inevitably produces lateral deviation of the suspension module during operation, and the track irregularity of the permanent magnetic track and the inner wall of the track beam, which affects the dynamic performance of the permanent magnetic suspension system.

[0004] The existing magnetic levitation train vibration test bench is mainly designed for conventional conductive magnetic levitation vehicles and high-temperature superconducting magnetic levitation vehicles, and these cannot perform systematic vehicle-track coupled vibration simulation test on the permanent magnetic levitation vehicle. In order to efficiently and accurately study the dynamic performance of the permanent magnetic levitation track transportation, an experimental device capable of simulating the operation of the permanent magnetic levitation train and testing its dynamic performance is needed. SUMMARY

[0005] The present application provides a permanent magnetic levitation train vibration test bench to overcome the deficiencies of the prior art. The hydraulic vibrator of the present application simulates track irregularity through various working conditions, which can support permanent magnetic levitation vehicle-track coupled vibration simulation test. The present application specifically adopts the following technical solutions.

[0006] First, in order to achieve the above-mentioned purpose, a permanent magnetic levitation train vibration test bench is provided, which comprises: a base; a vertical excitation system arranged on the base for outputting vertical excitation; a permanent magnetic track simulation system connected to the bottom of the vertical excitation system and moving up and down by accepting the vertical excitation output by the vertical excitation system; a door-shaped support frame spanning the permanent magnetic track simulation system and having a cross beam fixed above the permanent magnetic track simulation system; a suspension platform fixedly connected with the cross beam of the door-shaped support frame and arranged between the cross beam and the permanent magnetic track simulation system for accommodating the suspension frame of the permanent magnetic levitation train to run in suspension inside; a lateral excitation system for outputting lateral excitation; and a longitudinal excitation system arranged on the top of the suspension platform and having a pull rod connected with the suspension platform and the suspension frame of the permanent magnetic levitation train for constraining the longitudinal displacement degree of freedom of the suspension frame of the permanent magnetic levitation train.

[0007] Optionally, the vibration test bench for the maglev train as claimed in any one of the above claims, wherein the vertical excitation system comprises a vertical hydraulic vibrator of the maglev track, the bottom of which is fixedly connected to the base; and a rotating support platform of the maglev track, which is arranged above the base and is fixedly connected to the top of the vertical hydraulic vibrator of the maglev track, and is driven by the vertical hydraulic vibrator of the maglev track to move up and down relative to the base.

[0008] Optionally, the vibration test bench for the maglev train as claimed in any one of the above claims, wherein the maglev track simulation system comprises a rolling bearing, which is fixedly installed above the rotating support platform of the maglev track; a fixed rotating shaft, which is installed in the rolling bearing and is arranged in parallel between the crossbeam of the portal frame and the rotating support platform of the maglev track; a rotating disc of the maglev track, which is rotatably installed on the fixed rotating shaft and is arranged between the rotating support platform of the maglev track and the suspension platform; a rotating motor of the maglev track, which is in transmission connection with the fixed rotating shaft and drives the rotating disc of the maglev track to rotate; and a maglev track, which is laid around the outer periphery of the rotating disc of the maglev track and is arranged below the levitation frame of the maglev train in the suspension platform, and rotates synchronously with the rotating disc of the maglev track; the levitation frame of the maglev train is suspended above the maglev track and is kept inside the suspension platform.

[0009] Optionally, the vibration test bench for the maglev train as claimed in any one of the above claims, wherein the lateral excitation system comprises a lateral hydraulic vibrator of the maglev track, which is hingedly connected between the base and the rotating support platform of the maglev track, and is used to drive the rotating support platform of the maglev track to output lateral vibration force and displacement relative to the levitation frame of the maglev train.

[0010] Optionally, the vibration test bench for the maglev train as claimed in any one of the above claims, wherein the bottom of the suspension platform is provided with an opening, and a roller is further arranged inside the opening, the roller is arranged in parallel to the crossbeam and is arranged on both sides of the opening in the bottom of the suspension platform, the two rollers are oppositely arranged and are respectively fixed to both sides of the levitation frame of the maglev train, and are used to constrain the lateral displacement of the levitation frame of the maglev train.

[0011] Optionally, the vibration test bench for the maglev train as claimed in any one of the above claims, wherein the lateral excitation system further comprises a guide module lateral hydraulic vibrator, which is fixedly installed on the inner side wall of the suspension platform and is connected to the roller, and is used to output lateral excitation to drive the roller and adjust the lateral spacing between the roller and the levitation frame of the maglev train.

[0012] Optionally, the vibration test bench for the maglev train as claimed in any one of the above claims, wherein the top of the suspension platform is further provided with a roller rotating motor, the roller rotating motor is drivingly connected to an upper roller shaft and a lower roller shaft arranged inside the suspension platform, the upper roller shaft is drivingly connected to the rollers arranged on the upper part of the inner side wall of the suspension platform, the lower roller shaft is drivingly connected to the rollers arranged on the lower part of the inner side wall of the suspension platform, the upper roller shaft and the lower roller shaft are drivingly connected by a shaft coupling, and the roller rotating motor drives the rollers on the inner side wall of the suspension platform to rotate correspondingly through the upper roller shaft and the lower roller shaft.

[0013] Optionally, the vibration test bench for the maglev train as claimed in any one of the above claims, wherein the longitudinal excitation system comprises a suspension longitudinal constraint platform fixedly arranged inside the suspension platform and located on the top of the maglev train suspension frame, and the pull rods are arranged at the front and rear ends of the suspension longitudinal constraint platform and are hingedly connected to the front and rear ends of the maglev train suspension frame, respectively.

[0014] Optionally, the vibration test bench for the maglev train as claimed in any one of the above claims, wherein the vertical hydraulic vibrator of the permanent magnetic track, the horizontal hydraulic vibrator of the permanent magnetic track, the horizontal hydraulic vibrator of the guide module, the roller rotating motor and the permanent magnetic track rotating motor are respectively connected to the computer to adjust the driving output in response to the control instruction of the computer.

[0015] Optionally, the vibration test bench for the maglev train as claimed in any one of the above claims, wherein the suspension platform is further provided with a force sensor and a vibration sensor, and the force sensor and the vibration sensor are respectively connected to the computer to collect the running data of the maglev train suspension frame. Advantages

[0016] The vibration test bench for the maglev train provided in the present application comprises a base, a vertical excitation system, a permanent magnetic track simulation system, a door-shaped support frame, a suspension platform, a horizontal excitation system and a longitudinal excitation system. The present application adjusts the positional relationship between the maglev train suspension frame and the suspension platform, the permanent magnetic track simulation system through the vertical excitation system, the horizontal excitation system and the longitudinal excitation system, respectively, maintains the suspension state of the maglev train through the permanent magnetic track simulation system, and simulates various working conditions such as track irregularities through the vertical excitation system and the horizontal excitation system. The present application can test the dynamic performance of the maglev train under free suspension, can also test the vehicle-track coupled dynamic performance, and has a wide range of applications.

[0017] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and are used to explain the present application and are not intended to limit the present application. In the drawings:

[0019] Figure 1 The whole structure schematic diagram of the permanent magnet levitation train vibration test bed provided in the present application.

[0020] Figure 2 The partial structure schematic diagram of the suspension platform in the present application.

[0021] Figure 3 The partial structure schematic diagram of the permanent magnet levitation train suspension frame in the present application.

[0022] Marked in the figure: 1 represents the base; 2 represents the permanent magnet track vertical hydraulic vibrator; 3 represents the permanent magnet track rotating support platform; 4 represents the permanent magnet track; 5 represents the door type support frame; 6 represents the permanent magnet levitation train suspension frame; 7 represents the suspension platform; 8 represents the roller rotating motor; 9 represents the permanent magnet track rotating motor; 10 represents the permanent magnet track rotating disc; 11 represents the permanent magnet track transverse hydraulic vibrator; 12 represents the guide module transverse hydraulic vibrator; 13 represents the coupling; 14 represents the roller; 15 represents the suspension longitudinal constraint platform; 16 represents the permanent magnet levitation module; 17 represents the guide module. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical scheme of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0024] Those skilled in the art can understand that, unless otherwise defined, all the terms (including technical terms and scientific terms) used herein have the same meaning as that generally understood by those skilled in the art in the field of the present application. It should also be understood that those terms such as those defined in a general dictionary should be understood as having the same meaning as that in the context of the prior art, and should not be interpreted with an idealized or overly formal meaning unless defined as such herein.

[0025] The meaning of "inner, outer" described in the present application refers to the direction of the door type support frame pointing to the inner roller of the suspension platform as inner, and vice versa as outer, relative to the permanent magnet levitation train vibration test bed itself, rather than a specific limitation of the device mechanism of the present application.

[0026] The meaning of "connection" described in the present application can be direct connection between components or indirect connection between components through other components.

[0027] The meaning of "up, down" described in the present application refers to the direction from the bottom plate to the top end of the door-type support when a user faces the permanent magnet levitation train vibration test bench, and the opposite direction is the down direction, which is not a specific limitation on the device mechanism of the present application.

[0028] Figure 1 A permanent magnet levitation train vibration test bench according to the present application comprises:

[0029] a base 1;

[0030] a vertical excitation system arranged on the base 1 and configured to output a vertical excitation; the vertical excitation system can generally comprise a permanent magnet track vertical hydraulic vibrator 2 fixedly connected to the bottom of the base 1, and a permanent magnet track rotating support platform 3 arranged above the base 1 and fixedly connected to the top of the permanent magnet track vertical hydraulic vibrator 2, wherein the permanent magnet track rotating support platform 3 is driven by the permanent magnet track vertical hydraulic vibrator 2 to move up and down relative to the base 1;

[0031] a permanent magnet track simulation system connected to the bottom of the vertical excitation system and configured to move up and down in response to the vertical excitation output by the vertical excitation system; generally, to simulate the running state of a magnetic suspension system, the permanent magnet track simulation system can be arranged to comprise a rolling bearing fixedly installed above the permanent magnet track rotating support platform 3, a fixed rotating shaft installed in the rolling bearing and arranged in parallel between the crossbeam of a door-type support frame 5 and the permanent magnet track rotating support platform 3, a permanent magnet track rotating disc 10 rotatably installed on the fixed rotating shaft and arranged between the permanent magnet track rotating support platform 3 and a suspension platform 7, a permanent magnet track rotating motor 9 in transmission connection with the fixed rotating shaft and configured to drive the permanent magnet track rotating disc 10 to rotate, and a permanent magnet track 4 laid around the outer periphery of the permanent magnet track rotating disc 10 and arranged below the permanent magnet levitation train suspension frame 6 in the suspension platform 7, and configured to rotate synchronously with the permanent magnet track rotating disc 10;

[0032] a door-type support frame 5 arranged across the permanent magnet track simulation system and having a crossbeam fixedly arranged above the permanent magnet track simulation system;

[0033] a suspension platform 7 fixedly connected to the crossbeam of the door-type support frame 5 and arranged between the crossbeam and the permanent magnet track simulation system, and configured to accommodate the permanent magnet levitation train suspension frame 6 to run in suspension inside the suspension platform 7;

[0034] The transverse excitation system is used for outputting transverse excitation, which can be generally provided with a permanent magnetic track transverse hydraulic vibrator 11 hinged between the base 1 and the permanent magnetic track rotating support platform 3, used for driving the permanent magnetic track rotating support platform 3 to drive the permanent magnetic track rotating disc 10 and the permanent magnetic track 4 to output transverse vibration force and displacement relative to the permanent magnetic levitation train suspension frame 6.

[0035] The longitudinal excitation system is arranged on the top of the suspension platform 7, has a pull rod connected with the suspension platform 7 and the permanent magnetic levitation train suspension frame 6, and is used for restricting the longitudinal displacement degree of freedom of the permanent magnetic levitation train suspension frame 6.

[0036] In the present application, the permanent magnetic levitation train suspension frame 6 installed in the suspension platform 7 can be generally kept suspended above the permanent magnetic track 4 through the repulsion of the permanent magnetic suspension module 16 at the bottom of the permanent magnetic levitation train suspension frame 6, and kept inside the suspension platform 7 through the guidance of the guide modules at both ends. And the driving output of the permanent magnetic track vertical hydraulic vibrator 2, the permanent magnetic track transverse hydraulic vibrator 11, the guide module transverse hydraulic vibrator 12, the roller rotating motor 8 and the permanent magnetic track rotating motor 9 is adjusted through the control instruction of the computer, respectively simulating various working conditions such as track unevenness passing, suspension module transverse deviation, etc., to test the dynamic performance of the permanent magnetic levitation train under free suspension and the vehicle-track coupled dynamic performance.

[0037] In a more specific implementation, the vibration test bench of the present application can be further provided with Figure 1 , the base 1, the permanent magnetic track vertical hydraulic vibrator 2, the permanent magnetic track rotating support platform 3, the permanent magnetic track rotating disc 10, the permanent magnetic levitation train suspension frame 6, the suspension longitudinal constraint platform 15, and the suspension platform 7. The permanent magnetic track vertical hydraulic vibrator 2 is fixedly installed above the base 1 through a mounting seat. The permanent magnetic track rotating support platform 3 is arranged above the permanent magnetic track vertical hydraulic vibrator 2, and the bottom of the permanent magnetic track rotating support platform 3 is hinged with the vertical hydraulic vibrator. The permanent magnetic track rotating disc 10 is arranged above the permanent magnetic track rotating support platform 3. The permanent magnetic levitation train suspension frame 6 is arranged above the permanent magnetic track rotating disc 10. The suspension longitudinal constraint platform 15 is arranged above the permanent magnetic levitation train suspension frame 6. The suspension platform 7 is arranged above the suspension longitudinal constraint platform 15.

[0038] The permanent magnetic track vertical hydraulic vibrator 2 therein can provide vertical excitation force, and the permanent magnetic track vertical hydraulic vibrator 2 is used to simulate various working conditions such as permanent magnetic track track unevenness passing. The permanent magnetic track rotating support platform 3 is flush with the ground, and the base 1 is below the ground, so that the height of the permanent magnetic levitation vibration test bench above the ground can be reduced. The rotation of the permanent magnetic track rotating disc 10 can drive the upper permanent magnetic track to rotate, so that the driving speed of the permanent magnetic levitation train can be simulated.

[0039] The base 1 is also provided with a permanent magnetic track transverse hydraulic vibrator 11, the two ends of which are respectively hinged to the base 1 and the permanent magnetic track rotating support platform 3.

[0040] The permanent magnetic track transverse hydraulic vibrator 11 can provide a transverse exciting force, and through the permanent magnetic track transverse hydraulic vibrator 11, various working conditions such as lateral deviation of the suspension module can be simulated.

[0041] The permanent magnetic track rotating support platform 3 is also provided with a permanent magnetic track rotating motor. The permanent magnetic track rotating motor 9 can provide power to the permanent magnetic track rotating disc 10, so that the permanent magnetic track 4 can be rotated. The permanent magnetic track rotating disc 10 is installed on a fixed rotating shaft, the fixed rotating shaft is installed on the permanent magnetic track rotating support platform 3 through a rolling bearing, and one end of the shaft is connected with the permanent magnetic track rotating motor 9. The rotating disc is provided with a permanent magnetic track.

[0042] Reference Figure 3 As shown, the bottom of the permanent magnetic suspension train suspension frame 6 is provided with a permanent magnetic suspension module 16, and the top is provided with a guide module 17. The permanent magnetic suspension train suspension frame 6 can run in the suspension platform 7 shown in the figure through the constraint of the permanent magnetic suspension module 16 and the guide module 17. Figure 2 The bottom of the suspension platform 7 is provided with an opening, and the inside is also provided with a roller 14, which is parallel to the cross beam and is arranged on both sides of the opening at the bottom of the suspension platform 7. The two rollers 14 are oppositely arranged and respectively fixed to the two sides of the permanent magnetic suspension train suspension frame 6, and are used to constrain the lateral displacement of the permanent magnetic suspension train suspension frame 6.

[0043] The inside of the suspension platform 7 can be provided with a transverse excitation system, which is connected with the roller 14 through a guide module transverse hydraulic vibrator 12 fixedly installed on the inner wall of the suspension platform 7, and outputs a transverse excitation drive to the roller 14 to adjust the transverse spacing between the roller 14 and the permanent magnetic suspension train suspension frame 6.

[0044] Each roller 14 can also be driven to rotate by a roller rotating motor 8 arranged at the top of the suspension platform 7. The roller rotating motor 8 is drivingly connected with an upper roller shaft and a lower roller shaft arranged in the inside of the suspension platform 7. The upper roller shaft is drivingly connected with the roller 14 arranged on the upper part of the inner wall of the suspension platform 7, and the lower roller shaft is drivingly connected with the roller 14 arranged on the lower part of the inner wall of the suspension platform 7. The upper roller shaft and the lower roller shaft are drivingly connected by a shaft coupling 13. The roller rotating motor 8 drives the corresponding rotation of the roller 14 on the inner wall of the suspension platform 7 through the upper roller shaft and the lower roller shaft.

[0045] The top of the levitation longitudinal restraint platform 15 can be connected with the suspension platform 7 to form a longitudinal excitation system. In the longitudinal excitation system, the levitation longitudinal restraint platform 15 is provided with a longitudinal pull rod hinged with the levitation frame 6 of the magnetic levitation train on the front and back of the longitudinal direction, respectively. The longitudinal pull rods extend forward and backward from the levitation longitudinal restraint platform 15, and the bottom ends of the longitudinal pull rods are hinged with the front and back ends of the levitation frame 6 of the magnetic levitation train, respectively.

[0046] When the vibration test is performed, the levitation frame of the magnetic levitation train can be restrained on the levitation longitudinal restraint platform 15. When the vibration test of the magnetic levitation train is performed, the longitudinal displacement of the levitation frame is restrained by the longitudinal pull rod of the levitation frame installed on the levitation longitudinal restraint platform 15. Because an object has six degrees of freedom, i.e., translation along three coordinate axes and rotation around three coordinate axes; the direction of gravity is the vertical direction, the forward direction is the longitudinal direction, and the horizontal plane perpendicular to the forward direction is the transverse direction. The levitation force provided by the levitation module and the guiding force provided by the guiding module 17 are determined along the vertical direction and the transverse direction, respectively, so that the magnetic levitation train can be restrained in the vertical direction and the transverse direction. The magnetic levitation train generates no force in the longitudinal direction, so the longitudinal displacement degree of the levitation frame needs to be restrained by the longitudinal pull rod to limit the longitudinal displacement of the levitation frame.

[0047] Meanwhile, the inside of the suspension platform 7 is hinged with the guiding module transverse hydraulic vibrator 12. The guiding module transverse hydraulic vibrator 12 is connected with the bottom of the U-shaped frame. The U-shaped frame supports the upper and lower roller shafts through bearings, respectively. The upper roller shaft is connected with the lower roller shaft through the coupling 13, and the other end of the upper roller 14 is connected with the roller rotating motor 8 through the bevel gear. The rollers 14 are installed on the upper and lower roller shafts, respectively. The top of the suspension platform 7 is connected with the door-shaped support frame 5.

[0048] The force sensor and the vibration sensor arranged on the suspension platform 7 can collect the running state data of the train correspondingly; the guiding module transverse hydraulic vibrator 12 can provide a transverse excitation force, and the guiding module transverse hydraulic vibrator 12 is used to simulate various working conditions such as track irregularities on the inner wall of the track beam.

[0049] Therefore, the transmission route of the vertical excitation received by the tested vehicle can be set as follows: the permanent magnetic track vertical hydraulic vibrator 2 acts under the control of the computer control system to generate an excitation force and displacement, and transmits the excitation to the permanent magnetic track rotating support platform 3 on the hydraulic excitation system. The permanent magnetic track rotating support platform 3 transmits the vertical excitation to the rotating disc, and the rotating disc transmits the vertical excitation to the permanent magnetic track arranged on the outer periphery of the rotating disc. Finally, the vertical excitation is transmitted to the permanent magnetic levitation module 16 and the levitation frame 6 of the magnetic levitation train through the change of the magnetic field of the permanent magnetic track, and finally transmitted to the tested vehicle connected with the levitation frame 6 of the magnetic levitation train.

[0050] The transmission route of the lateral excitation suffered by the tested vehicle can be set as: the lateral hydraulic vibrator 12 of the guide module acts under the control of the computer control system to generate excitation force and displacement, which is transmitted to the U-shaped frame of the hydraulic excitation system, then to the roller shaft, then to the roller 14, and then to the guide module 17 through the roller, and then to the permanent magnet suspension train suspension frame 6 through the guide module 17, and finally to the tested vehicle connected to the permanent magnet suspension train suspension frame. In addition, the permanent magnet track lateral hydraulic vibrator 11 arranged on the base also generates excitation force and displacement in response to the control of the computer control system, which is transmitted to the permanent magnet track rotating support platform 3 on the hydraulic excitation system, and then to the permanent magnet track rotating disc 10 through the permanent magnet track rotating support platform 3, and then to the permanent magnet track 4, and finally to the permanent magnet suspension module 16 through the magnetic force of the permanent magnet track 4. The lateral excitation of the permanent magnet track lateral hydraulic vibrator 11 is transmitted to the permanent magnet suspension train suspension frame 6 through the change of the magnetic force suffered by the permanent magnet suspension module 16, and finally to the tested vehicle connected to the permanent magnet suspension train suspension frame 6.

[0051] Therefore, the permanent magnet suspension train track coupling vibration simulation test route can be designed as follows: the tested permanent magnet suspension train is suspended on the Halbach permanent magnet track installed on the rotating disc through the permanent magnet suspension module 16 on the permanent magnet suspension train suspension frame 6, the guide module 17 on the permanent magnet suspension train suspension frame 6 is in contact with the roller 14, and the suspension longitudinal restraint platform 15 mechanically limits the longitudinal direction of the permanent magnet suspension train suspension frame 6 through the pull rod. When the longitudinal direction of the permanent magnet suspension train suspension frame 6 is limited, the computer controls the permanent magnet track vertical hydraulic vibrator 2, the permanent magnet track lateral hydraulic vibrator 11 and the guide module lateral hydraulic vibrator 12 to act, generates excitation and transmits it to the tested vehicle through the test platform, and then uses the force sensor and vibration sensor arranged on the vehicle and other test equipment to test the suspension capability of the suspension system and the vibration characteristics of the whole vehicle and other response parameters. The rotation speed of the permanent magnet track is obtained by using the rotation speed of the computer-controlled permanent magnet track rotating motor 9 to simulate the driving speed of the permanent magnet suspension train, and the response parameters of the simulated track beam are tested by using the force sensor and vibration sensor arranged on the suspension platform 7 and other test equipment.

[0052] The above is only an embodiment of the present application, which is described in detail, but it cannot be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of protection of the present application.

Claims

1. A vibration test rig for a maglev train, characterized in that, It comprises: a base (1); a vertical excitation system arranged on the base (1) for outputting vertical excitation; a permanent magnetic track simulation system having its bottom connected to the vertical excitation system and moving up and down by accepting the vertical excitation outputted by the vertical excitation system; a door-shaped support frame (5) spanning the permanent magnetic track simulation system and having a crossbeam fixed above the permanent magnetic track simulation system; a suspension platform (7) fixedly connected with the crossbeam of the door-shaped support frame (5) and arranged between the crossbeam and the permanent magnetic track simulation system for accommodating the permanent magnetic levitation train suspension frame (6) to levitate and run inside it; a lateral excitation system for outputting lateral excitation; a longitudinal excitation system arranged on the top of the suspension platform (7) and having a pull rod connected with the suspension platform (7) and the permanent magnetic levitation train suspension frame (6) for restricting the longitudinal displacement degree of freedom of the permanent magnetic levitation train suspension frame (6). The vertical excitation system comprises: a permanent magnetic track vertical hydraulic vibrator (2) having its bottom fixedly connected with the base (1); a permanent magnetic track rotary support platform (3) arranged above the base (1) and fixedly connected with the top of the permanent magnetic track vertical hydraulic vibrator (2), the permanent magnetic track rotary support platform (3) being driven by the permanent magnetic track vertical hydraulic vibrator (2) to move up and down relative to the base (1). The permanent magnetic track simulation system comprises: a rolling bearing fixedly installed above the permanent magnetic track rotary support platform (3); a fixed rotary shaft installed in the rolling bearing and arranged in parallel between the crossbeam of the door-shaped support frame (5) and the permanent magnetic track rotary support platform (3); a permanent magnetic track rotary disc (10) rotatably installed on the fixed rotary shaft and arranged between the permanent magnetic track rotary support platform (3) and the suspension platform (7); a permanent magnetic track rotary motor (9) in transmission connection with the fixed rotary shaft and driving the permanent magnetic track rotary disc (10) to rotate; a permanent magnetic track (4) laid on the outer periphery of the permanent magnetic track rotary disc (10) and arranged below the permanent magnetic levitation train suspension frame (6) in the suspension platform (7), rotating synchronously with the permanent magnetic track rotary disc (10). The permanent magnetic levitation train suspension frame (6) levitates above the permanent magnetic track (4) and is kept inside the suspension platform (7).

2. The permanent magnetic levitation train vibration test bench according to claim 1, wherein, The lateral excitation system comprises: a permanent magnetic track lateral hydraulic vibrator (11) hinged between the base (1) and the permanent magnetic track rotary support platform (3) for driving the permanent magnetic track rotary support platform (3) to drive the permanent magnetic track rotary disc (10) and the permanent magnetic track (4) to output lateral vibration force and displacement relative to the permanent magnetic levitation train suspension frame (6).

3. The permanent magnetic levitation train vibration test bench according to claim 2, characterized in that, The bottom of the suspension platform (7) is provided with an opening, and a roller (14) is further arranged inside the suspension platform (7), the roller (14) being arranged in parallel with the crossbeam and on both sides of the opening in the bottom of the suspension platform (7), the rollers (14) on both sides being oppositely arranged and fixedly connected with the permanent magnetic levitation train suspension frame (6) on both sides, respectively, for restricting the lateral displacement of the permanent magnetic levitation train suspension frame (6).

4. The permanent magnetic levitation train vibration test bench according to claim 3, characterized in that, The lateral excitation system further comprises: A guide module transverse hydraulic vibrator (12) is fixedly installed on the inner side wall of the suspension platform (7) and is connected with the rollers (14) to output transverse excitation to drive the rollers (14) and adjust the transverse distance between the rollers (14) and the levitation frame (6) of the permanent magnetic levitation train.

5. The permanent magnetic levitation train vibration test bed of claim 4, wherein, The top of the suspension platform (7) is further provided with a roller rotating motor (8) which is drivingly connected with an upper roller shaft and a lower roller shaft arranged inside the suspension platform (7), the upper roller shaft is drivingly connected with the rollers (14) arranged on the upper part of the inner side wall of the suspension platform (7), the lower roller shaft is drivingly connected with the rollers (14) arranged on the lower part of the inner side wall of the suspension platform (7), the upper roller shaft and the lower roller shaft are drivingly connected by a shaft coupling (13), and the roller rotating motor (8) drives the corresponding rotation of the rollers (14) on the inner side wall of the suspension platform (7) through the upper roller shaft and the lower roller shaft.

6. The permanent magnetic levitation train vibration test bed of claim 5, wherein, The longitudinal excitation system comprises: A suspension longitudinal restraint platform (15) is fixedly arranged inside the suspension platform (7) and located on the top of the levitation frame (6) of the permanent magnetic levitation train, and the pull rods are arranged at the front and rear ends of the suspension longitudinal restraint platform (15) and are hingedly connected with the front and rear ends of the levitation frame (6) of the permanent magnetic levitation train.

7. The permanent magnetic levitation train vibration test bed of claim 6, wherein, The permanent magnetic track vertical hydraulic vibrator (2), the permanent magnetic track transverse hydraulic vibrator (11), the guide module transverse hydraulic vibrator (12), the roller rotating motor (8) and the permanent magnetic track rotating motor (9) are respectively connected with the computer to adjust the driving output in response to the control instructions of the computer.

8. The permanent magnetic levitation train vibration test bed of claim 7, wherein, The suspension platform (7) is further provided with a force sensor and a vibration sensor which are respectively connected with the computer to collect the operation data of the levitation frame (6) of the permanent magnetic levitation train. The suspension platform (7) is further provided with a force sensor and a vibration sensor which are respectively connected with the computer to collect the operation data of the levitation frame (6) of the permanent magnetic levitation train.

Images