CN112182687A - High-speed magnetic suspension turnout switch control time sequence - Google Patents
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Abstract
The invention relates to a high-speed magnetic suspension turnout switch control time sequence which can solve the problems that the field time sequence debugging workload of a method for determining the switch time sequence by field test is large, the structure of a turnout part is easily damaged in the debugging process, and the proper switch time sequence of the turnout cannot be determined in a short time.
Description
Technical Field
The invention relates to a high-speed magnetic suspension turnout switch control time sequence which can solve the problems that the field time sequence debugging workload is large, the structure of a turnout part is easily damaged in the debugging process, and the proper switch time sequence of the turnout cannot be determined in a short time in a method for determining the switch time sequence through field tests, and belongs to the technical field of urban rail transit.
Background
(1) Research on the driving arrangement of high-speed turnout of Zhu Shi Wei and high-speed magnetic levitation lines [ J ] urban rail transit research 2011(5): 83. The document introduces a driving scheme of a high-speed magnetic suspension line high-speed turnout in the world, wherein the driving scheme is driven by a first auxiliary motor and is driven by a gear and a rack. By geometric nonlinear analysis, the characteristics of the high-speed turnout switching process under different driving arrangement schemes are compared, and an arrangement scheme with small deviation of the in-place position of a fulcrum, smooth change of linear and main beam stress and driving force and good economical efficiency is obtained. The 5 schemes listed in this document only simply combine the active fulcrums, do not research the core design method and principle of the active fulcrums, and do not research the driving time sequence of the active fulcrums, and the driving time sequence affects the driving power and the switching stress of the turnout beam. The literature does not relate to a method for designing the switch timing of the turnout.
(2) Zhang hongjun, the process of shifting the turnout steel beam of the high-speed magnetic suspension line and the numerical analysis thereof [ J ] urban rail transit research, 2010(7): 32. The document introduces the main structure of the turnout of the high-speed magnetic suspension line as a continuous box-section steel beam. The turnout switching scheme is numerically calculated from the structural stress angle by adopting two calculation models of end rigid connection and hinged connection and beam units and shell units, and the calculation results are compared and analyzed. During calculation, if detailed results on the cross section are not required to be obtained, the beam model can be used for calculation; if detail results on the cross section are obtained, calculation must be carried out by adopting a shell model, and corresponding data are obtained. The literature only carries out finite element calculation on one driving mode listed in the literature, mainly studies the influence of a beam element and a shell element in the calculation, and studies the difference between rigid connection and hinge connection of the end part. The literature does not relate to a method for designing the switch timing sequence of the turnout.
(3) At present, the switching time sequence of the domestic high-speed magnetic suspension turnout does not form a systematic research result, and the switching time sequence of the turnout is mainly determined by a field test method. The method for determining the switch timing sequence through the field test has the defects that the field timing sequence debugging workload is large, the structure of the turnout part is easily damaged in the debugging process, and the proper switch timing sequence of the turnout cannot be determined in a short time. The lack of a system design method not only wastes manpower and has low efficiency but also is not accurate enough.
Disclosure of Invention
The design purpose is as follows: the method can solve the problems that the field time sequence debugging workload is large, the structure of the turnout part is easily damaged in the debugging process, and the proper switching time sequence of the turnout cannot be determined in a short time.
The design scheme is as follows: the high-speed magnetic suspension turnout is divided into a high-speed turnout and a low-speed turnout, both the high-speed turnout and the low-speed turnout are flexible turnouts, and the length of a turnout beam is elastically deformed to be in a theoretical linear shape under the action of a trolley. The motion time sequence of the driving trolley has great influence on the power of the driving trolley, the service life of the turnout beam and the running track of the trolley wheel. Therefore, the switching time sequence of the high-speed magnetic suspension turnout is the core content of the turnout design stage.
The design method comprises one or more of the steps of determining the arrangement position of a key trolley, determining key elements of a switch time sequence, proposing a switch time sequence control method and determining the switch time sequence through comparison calculation and optimization.
(1) Key trolley arrangement position
As shown in fig. 1, according to the requirement of the line shape of the turnout, "straight line-easement curve-circular curve-easement curve straight line", the plane combination composed of 5 piecewise functions is used to fit the bending curve of the turnout steel beam, and the turnout steel beam needs to reach the deformation curve composed of the above three sections of curves (easement curve-circular curve-easement curve) under the drive of concentrated load.
A simple calculation diagram of the transverse bending of the turnout beam under the action of the concentrated load known by statics is shown in figure 2, the shearing force and the bending moment at any position of the turnout beam are calculated by an internal force analysis cross section method, and the internal bending moment of the cross section is X when the distance from a point 2# between 2# and 6# is assumed to be the cross section at any position with the X distance from the point 2#, namely
Which isMiddle L1 is the distance between 0# -2 #. And the relation formula of the beam axis bending moment and the curvature under the bending state is as follows:
for the interval between 2# and 6# is a circular curve, namely the curvature radius
At a constant value, bending rigidity
A constant with respect to the switch beam, so there are:
thus, P0= P2, and similarly, P6= P8
According to material mechanics analysis, the shearing force on the cross section of the turnout beam between the points 1# to 4# is zero, the bending moment is constant, the section is pure bending, the cross section only has positive stress without shearing stress, and the bending curve is a pure circular curve.
According to the analysis, the key driving trolley is required to be positioned on a linear conversion point when being arranged, so that the turnout beam can be ensured to reach a deformation curve formed by the three sections of curves (a transition curve-a circular curve-a transition curve) under the drive of concentrated load, and the comfort and the safety of the train passing through the turnout are ensured.
(2) Determining key control elements of switch timing
Through theoretical research and design checking calculation of the high-speed magnetic suspension turnout beam, the stress of the turnout beam body, trolley driving power and trolley running track are greatly influenced by different switching sequences under a given driving trolley arrangement scheme.
The maximum stress of the turnout beam body continuously changes along with the switching process, different switching time sequences generate different maximum stress values, the service life of the turnout is directly influenced, and the set time sequence must meet the fatigue stress amplitude of the turnout.
The driving power of the trolley is determined by the maximum counter force of the trolley in the switching process, the maximum counter force values of the trolley are different due to different time sequences in the switching process of the turnout, the switching time sequence with the smaller counter force value of the trolley is selected as far as possible, and the driving power is convenient to reduce.
The moving track of the trolley deviates from a circular curve as much as possible, and the production and the manufacture are convenient.
(3) Method for controlling switch timing sequence
As shown in fig. 3, a 2# -5# -8# trolley driving scheme is determined by comparison and calculation according to the key elements of the switching time sequence, the turnout is fixed at a 0# fulcrum, the driving trolleys at the positions of the branches 1#, 2#, 5#, and 8# exert lateral force on the turnout to force the steel beam of the turnout to elastically deform, so that the 1#, 2#, 5#, and 8# fulcrums of the turnout reach the required preset positions, and meanwhile, the 3#, 4#, 6#, and 7# points reach the allowable deviation range of the locking device to meet the requirement of next locking.
And determining key data such as a turnout deformation process, a driving force requirement, beam stress and the like according to key control elements of the switch timing sequence. When the turnout is switched, the fulcrums 1#, 2#, 5#, and 8# provide driving force through the driving motor, the 0# fulcrum is fixed, and the rest fulcrums are driven, wherein the 6# point is provided with a stop so as to better meet the linear shape of the turnout when the turnout is driven in place. Because the design line shape of the turnout is only useful when a vehicle is communicated, the switching process of the turnout can have various forms, and the switching time sequence is set as follows:
time averaging method-each driving point starts, advances at uniform speed, and arrives synchronously in unit time.
Distributed start averaging method-under the condition of meeting the requirement of total conversion time, starting step by step, advancing at constant speed and arriving synchronously;
point potential difference compensation method-the process of forming according to line shape, compensating middle key points, requiring that all key points are in place at the same time;
the active following method, namely, the position of the 8# trolley is used as a main drive, and the rest points follow the motion and are driven to be in place at the last 1#, 2#, and 5 #;
in the method, the point difference compensation method is not enough to embody the advantages of the driving system due to the large difficulty in software compilation of the driving system and the short running time of the motor; the active following method is not considered in the final driving.
The optimization aims at ensuring that the driving power in the turnout movement process, the internal stress of the beam does not exceed the design value and the running track of the trolley is basically kept in a circular shape so as to facilitate the design of a track part.
(4) Calculating and optimizing determination of switch timing and lock pin locking timing
And analyzing according to the four switch sequence control methods, and determining a time averaging method and a distributed starting averaging method as calculation optimization objects by considering the driving force and the software programming problem of a driving system.
Time averaging method: and (3) the fulcrums 1#, 2#, 5#, and 8# reach the set positions at the same time, and the maximum stress of the turnout, the trolley driving force and the trolley running wheel track in the process are calculated.
Distribution start-up averaging method: in order to reduce the total starting power of the whole motor, distributed starting is carried out on the driving trolleys, and according to the switch characteristics of the turnout, sequential arrangement, calculation and comparison are carried out according to the following sequence;
1) 1, 2, 5 and 8 fulcrums start to start step by step, wherein the 5 fulcrum is delayed than the 8 fulcrum, and the 1 and 2 fulcrums are delayed than the 5 fulcrum (the 5# fulcrum follows the turnout beam before starting);
2) 1, 2, 5 and 8 fulcrums start to start the 1, 2 and 5 fulcrums synchronously step by step, and are all delayed than the 8 fulcrums (the 5# fulcrum follows the turnout beam before starting);
3) the three fulcrums of 1, 2, 5 and 8 start to start step by step, wherein the fulcrums of 1 and 2 are delayed than the fulcrums of 8, and the fulcrum of 5 is delayed than the fulcrums of 1 and 2 (the fulcrum of 5# follows the turnout beam before starting).
A turnout beam model is built by adopting finite element software, grids are divided, load step control is set, displacement load is applied according to a set scheme, and the maximum stress of the turnout, the trolley driving force and the trolley traveling wheel track in the process are calculated. And comparing and optimizing the calculation results of the scheme, and determining the switch timing sequence and the locking pin locking timing sequence of the turnout according to the key of the switch timing sequence.
The technical scheme is as follows: a high-speed magnetic levitation turnout switch control time sequence is characterized in that: (1) determining the arrangement position of a key trolley, and ensuring the consistency of the actual linear shape and the theoretical linear shape of the turnout beam after the turnout beam is turned in place under the action of a driving trolley;
(2) carrying out linear fitting calculation through finite elements, and comparing the X coordinate values and the Y coordinate values of the actual linear points and the theoretical linear points of the driving trolleys arranged by the method after the points are switched in place, so as to ensure the accuracy of the switch linear shape of the turnout;
(3) according to the structural characteristics of the high-speed magnetic suspension turnout, the key elements of the switching time sequence are provided: the driving power, the beam stress and the trolley running track reduce the driving power of the turnout and prolong the service life of the turnout;
(4) according to the switching characteristics of the high-speed magnetic suspension turnout, the switching time sequence control method comprises the following steps of: under the condition of meeting the requirement of total conversion time, starting step by step, advancing at a constant speed, synchronously arriving, performing a point potential difference compensation method, namely, performing a linear forming process by the point potential difference compensation method, performing difference compensation on middle key points, requiring that all the key points are in place simultaneously, and performing an active following method, namely, taking the No. 8 trolley part as a main drive, and driving the rest points to move in place finally, so that the design of a timing sequence scheme of various flexible turnouts is solved.
(5) The turnout beam body is modeled through finite element software, a turnout timing sequence method which is proposed according to turnout switching characteristics in the early stage is compared, calculated and optimized, a turnout timing sequence is determined according to key elements of the turnout timing sequence, the field timing sequence debugging workload is reduced, and the product damage risk in the debugging process is reduced.
Compared with the background technology, the invention solves the problems that the field time sequence debugging workload is large, the structure of the turnout part is easy to damage in the debugging process, and the proper switch time sequence of the turnout cannot be determined in a short time in the method for determining the switch time sequence by field test, and is specifically embodied in that: the method comprises the steps of determining the arrangement position of a key trolley, determining key elements of a switch time sequence, proposing a switch time sequence control method and determining the switch time sequence through one or more of the steps of comparison calculation and optimization; secondly, the theory and the method of the arrangement position of the key trolley of the turnout are provided, and the comfort and the safety of the train passing the turnout are ensured; thirdly, key elements of the switch timing sequence are provided, and an optimized control target is provided for the switch timing sequence design of the turnout beam; fourthly, a switch timing sequence control method is provided, the whole service life of the turnout beam is prolonged, and the driving power of the trolley is reduced; fifthly, the determination of the switch time sequence in the switch design stage is realized, the workload of field debugging is greatly reduced, the field debugging efficiency of the switch is improved, and the safety risk in the debugging process is reduced; sixthly, the invention has the characteristics of high design efficiency, strong flexibility, energy conservation, consumption reduction and accurate result; the invention can be expanded to be applied to the switch timing design of various flexible turnouts (the fields of medium-low speed magnetic levitation, straddle type monorail, suspension type monorail, tour and sightseeing light rail and the like).
Drawings
Figure 1 is a line schematic diagram of a high-speed magnetic levitation turnout.
Fig. 2 is a force-bearing diagram of a high-speed magnetic suspension turnout.
Fig. 3 is a layout of high-speed magnetic suspension turnout switch driving trolley.
Fig. 4 is a track curve of the traveling wheel of the high-speed magnetic suspension turnout trolley.
Fig. 5 is a time-averaged method-driving force variation diagram.
Fig. 6 is a time-averaged method-beam length direction stress distribution diagram.
Fig. 7 is a graph of distribution start-up averaging 1-driving force variation.
FIG. 8 is a distributed Start-Up averaging 1-Beam Length stress Profile.
Fig. 9 is a graph of the distribution start-up averaging method 2-driving force variation.
FIG. 10 is a distributed Start-Up averaging 2-Beam Length stress Profile.
Fig. 11 is a graph of distribution start-up averaging 3-driving force variation.
FIG. 12 is a distributed Start-Up averaging 3-Beam Length stress Profile.
Detailed Description
Example 1: reference is made to fig. 1-12. A high-speed magnetic suspension turnout switch control time sequence, in particular to a high-speed magnetic suspension turnout switch control time sequence. The method is formed by one or more combinations of determining the arrangement position of a key trolley, determining key elements of the switch time sequence, proposing a switch time sequence control method and determining the switch time sequence through comparison calculation and optimization.
(1) Key trolley arrangement position
As shown in fig. 2, the curve of the turnout steel beam is fitted according to the turnout line shape requirement of 'straight line-gentle curve-round curve-gentle curve-straight line', and the plane combination consisting of 5 piecewise functions. Through material mechanics analysis, the shearing force on the cross section of the turnout beam between points 2# to 6# is zero, the bending moment is constant, the section is pure bending, the cross section only has positive stress without shearing stress, and the bending curve is a pure circular curve. From the analysis, it is known that the critical trolley must be located at the linear transition point when it is deployed.
As shown in fig. 3, key trolleys must be arranged at the positions 0#, 2#, 6#, and 8#, wherein the point 0# is a rotary trolley. In order to ensure that the vertical static stiffness of the turnout beam meets the use requirement of no more than 1/15000 and the transverse static stiffness meets the use requirement of no more than 1/15000, 1 set of trolleys are added between 1# -2#, 2 sets of trolleys are added between 2# -6#, 1 set of trolleys are added between 6# -8# respectively to provide vertical and transverse support, and the stiffness value of the turnout beam is calculated to meet the requirement. . It should be noted that the transverse displacement of the 2# trolley is small, and the trolley is driven by the stepped pin, so that the trolley added between 0# and 2# cannot realize a follow-up design, and needs to be driven synchronously with the 2# trolley.
And after the trolleys are added, finite element calculation is carried out on three driving modes of 2# -4# -8# trolley driving, 2# -5# -8# trolley driving and 2# -6# -8# trolley driving. The calculation finds that in the former two working conditions, the coordinate of the 6# trolley exceeds the theoretical position, so the position of the 6# trolley needs to be limited in the former two working conditions, namely the 6# trolley can be limited to continue moving after being in place, and the setting method can greatly improve the linear accuracy of the turnout after being driven in place and the stress condition of the locking pin.
And (3) calculating the three driving modes (beam stress, driving force and trolley traveling wheel track), comparing the beam stress and the trolley driving force after the turnout beam is switched in place, and shifting the 6# driving point to the 5# position. Therefore, the turning trolley is arranged at the No. 0 position, the No. 2 and the No. 4 position are driven trolleys, the driving trolleys are arranged at the No. 1, No. 2, No. 5 and No. 8 positions to provide lateral force for the turnout beam and force the turnout steel beam to generate elastic deformation, so that each fulcrum of the turnout reaches a preset position required by a system, and the curve shape of the whole turnout meets the requirement of the system.
(2) Computing and optimizing determination of switching timing
As shown in fig. 3, the four switch timing control methods are analyzed, and a time averaging method and a distributed starting averaging method are determined as calculation optimization objects in consideration of the switching characteristics of the high-speed magnetic suspension turnout.
Time averaging method: and (3) the fulcrums 1#, 2#, 5#, and 8# reach the set positions at the same time, and the maximum stress of the turnout, the trolley driving force and the trolley running wheel track in the process are calculated.
Distribution start-up averaging method: in order to reduce the total starting power of the whole motor, distributed starting is carried out on the driving trolley, according to the switch characteristics of the turnout and the analysis, the movement displacement of the fulcrums 1#, 2#, 5#, and 8# is sequentially increased, the three fulcrums 1, 2, 5, and 8 start to be started step by step, setting is carried out according to the actual running time 12s of the turnout, and the following three schemes are determined;
1) 1, 2, 5 and 8 fulcrums start to start step by step, wherein the 5 fulcrum is delayed by 2s than the 8 fulcrum, and the 1 and 2 fulcrums are delayed by 2s than the 5 fulcrum (the 5# fulcrum follows the turnout beam before starting);
2) 1, 2, 5 and 8 fulcrums start to start the 1, 2 and 5 fulcrums synchronously step by step, and the three fulcrums are delayed by 4s compared with the 8 fulcrums (follow the turnout beam before the 5# fulcrum starts);
3) the three fulcrums of 1, 2, 5 and 8 start to start step by step, wherein the fulcrums of 1 and 2 are delayed by 1s than the fulcrums of 8, and the fulcrums of 5 are delayed by 1s than the fulcrums of 1 and 2 (the fulcrums of 5# follow the turnout beam before starting).
And (3) establishing a turnout beam model by using finite element software, setting a point 0# as a hinged support constraint, setting a point 6# as an in-place limit, and switching a point 5# as a follow-up drive. And respectively carrying out simulation calculation on a time averaging method and a distributed start averaging method, loading by adopting load stepping in the whole process, and outputting the turnout beam stress, the trolley counterforce and the trolley travelling wheel track as targets.
As can be seen from finite element simulation calculation results (figures 5-12), under the scheme that three fulcrums of 1, 2, 5 and 8 start step by step, the fulcrums of 1 and 2 are delayed by 1s compared with the fulcrums of 8, and the fulcrums of 5 are delayed by 1s compared with the fulcrums of 1 and 2 (the fulcrums of 5# are delayed by 1s before starting and follow the turnout beam), the trolley driving force of the turnout beam is minimum, the beam stress meets the requirement, and the track (figure 5) of the trolley wheel is derived through finite element software, so that the rack processing requirement is met. Outputting the coordinates of the trolleys at No. 1# to No. 8# points after the switch is in place, wherein the coordinates need to be within the moving range of the locking pin. When locking, because 6# department is spacing, so lock 6# platform truck earlier, other platform trucks can lock in step, lock to switch beam right-hand member rail face end lock after the locking is accomplished, release platform truck drive power after the locking is accomplished.
The design method can also be used for driving the trolleys to move cooperatively, the switching speed and the position of the driving trolleys are adjusted at any time according to the power of the driving motor in the switching process of the turnout, the turnout driving trolleys move cooperatively, the turnout beam is kept to be in a constant bending moment at the circular curve section L2, and the peak stress of the turnout beam in the switching process is eliminated.
It is to be understood that: although the above embodiments have described the design idea of the present invention in more detail, these descriptions are only simple descriptions of the design idea of the present invention, and are not limitations of the design idea of the present invention, and any combination, addition, or modification without departing from the design idea of the present invention falls within the scope of the present invention.
Claims (2)
1. A high-speed magnetic levitation turnout switch control time sequence is characterized in that: (1) determining the arrangement position of a key trolley, and ensuring the consistency of the actual linear shape and the theoretical linear shape of the turnout beam after the turnout beam is turned in place under the action of a driving trolley;
(2) carrying out linear fitting calculation through finite elements, and comparing the X coordinate values and the Y coordinate values of the actual linear points and the theoretical linear points of the driving trolleys arranged by the method after the points are switched in place, so as to ensure the accuracy of the switch linear shape of the turnout;
(3) according to the structural characteristics of the high-speed magnetic suspension turnout, the key elements of the switching time sequence are provided: the driving power, the beam stress and the trolley running track reduce the driving power of the turnout and prolong the service life of the turnout;
(4) according to the switching characteristics of the high-speed magnetic suspension turnout, the switching time sequence control method comprises the following steps of: under the condition of meeting the requirement of total conversion time, starting step by step, advancing at a constant speed, synchronously arriving, performing a point potential difference compensation method, namely, performing a process of forming a line shape by the point potential difference compensation method, performing difference compensation on middle key points, requiring that all the key points are in place simultaneously, performing an active following method, namely, taking a No. 8 trolley part as a main drive, performing follow motion on the rest points, and finally performing drive in place, thereby solving the design of various flexible turnout switch timing sequence schemes;
(5) the turnout beam body is modeled through finite element software, a turnout timing sequence method which is proposed according to turnout switching characteristics in the early stage is compared, calculated and optimized, a turnout timing sequence is determined according to key elements of the turnout timing sequence, the field timing sequence debugging workload is reduced, and the product damage risk in the debugging process is reduced.
2. The high-speed magnetic levitation turnout switch control sequence of claim 1, comprising turnout beams between points 0#, 2#, 6#, and 8#, characterized in that:
(1) the arrangement position of the key trolley is as follows: according to the linear requirements of a straight line, a moderate curve, a round curve, a moderate curve and a straight turnout, a plane combination consisting of five piecewise functions is used for fitting the bending curve of the turnout steel beam, a rotary trolley is arranged at No. 0, a driving point of No. 6 is shifted to the No. 5 position, the No. 2 and No. 4 positions are driven trolleys, the driving trolleys are arranged at the No. 1, No. 2, No. 5 and No. 8 positions to provide lateral force for the turnout beam and force the turnout steel beam to elastically deform, so that each pivot of the turnout reaches a preset position required by a system, and the curve shape of the whole turnout meets the requirements of the system;
(2) determining a switching time sequence by adopting a distributed start average method: distributed starting is carried out on the driving trolleys, movement displacements of fulcrums 1#, 2#, 5#, and 8# are sequentially increased according to the switch characteristics of the turnout, starting is started step by three fulcrums 1, 2, 5, and 8, setting is carried out according to the actual running time 12s of the turnout, and the following three schemes are determined;
1) 1, 2, 5 and 8 fulcrums start to start step by step, wherein the 5 fulcrum is delayed by 2s than the 8 fulcrum, and the 1 and 2 fulcrums are delayed by 2s than the 5 fulcrum (the 5# fulcrum follows the turnout beam before starting); or
2) 1, 2, 5 and 8 fulcrums start to start the 1, 2 and 5 fulcrums synchronously step by step, and the three fulcrums are delayed by 4s compared with the 8 fulcrums (follow the turnout beam before the 5# fulcrum starts); or
3) 1, 2, 5, 8 three fulcrums begin to start step by step, 1, 2 fulcrums delay 1s than 8 fulcrums, 5 fulcrums delay 1s than 1, 2 fulcrums (follow switch beam follow-up before 5# fulcrum starts), during the locking, because 6# department is spacing, so lock 6# platform truck earlier, but all the other platform trucks are the synchronous locking, lock switch beam right-hand member rail face end lock after the locking is accomplished, release platform truck drive power after the locking is accomplished.
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| CN202010336065.9A Pending CN112182687A (en) | 2020-04-25 | 2020-04-25 | High-speed magnetic suspension turnout switch control time sequence |
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| JP2006327525A (en) * | 2005-05-30 | 2006-12-07 | East Japan Railway Co | Wheel flange oiling device and its control method |
| CN103132404A (en) * | 2013-02-07 | 2013-06-05 | 中铁宝桥集团有限公司 | Turnout line shape of joint flexible type turnout bending device |
| CN106467121A (en) * | 2015-08-19 | 2017-03-01 | 重庆齿轮箱有限责任公司 | Cross-saddle single-track traffic joint type five clears the way trouble |
| WO2019001058A1 (en) * | 2017-06-30 | 2019-01-03 | 比亚迪股份有限公司 | Switch and straddle-type rail system |
| CN213182750U (en) * | 2020-04-25 | 2021-05-11 | 中铁宝桥集团有限公司 | High-speed magnetic suspension turnout switch control time sequence arrangement structure |
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| JP2006327525A (en) * | 2005-05-30 | 2006-12-07 | East Japan Railway Co | Wheel flange oiling device and its control method |
| CN103132404A (en) * | 2013-02-07 | 2013-06-05 | 中铁宝桥集团有限公司 | Turnout line shape of joint flexible type turnout bending device |
| CN106467121A (en) * | 2015-08-19 | 2017-03-01 | 重庆齿轮箱有限责任公司 | Cross-saddle single-track traffic joint type five clears the way trouble |
| WO2019001058A1 (en) * | 2017-06-30 | 2019-01-03 | 比亚迪股份有限公司 | Switch and straddle-type rail system |
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