CN112482210B - Large displacement telescopic device for high-speed magnetic suspension bridge - Google Patents
Large displacement telescopic device for high-speed magnetic suspension bridge Download PDFInfo
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- CN112482210B CN112482210B CN202011427015.8A CN202011427015A CN112482210B CN 112482210 B CN112482210 B CN 112482210B CN 202011427015 A CN202011427015 A CN 202011427015A CN 112482210 B CN112482210 B CN 112482210B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/30—Tracks for magnetic suspension or levitation vehicles
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/30—Tracks for magnetic suspension or levitation vehicles
- E01B25/305—Rails or supporting constructions
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/065—Joints having sliding plates
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a high-speed magnetic levitation bridge large-displacement expansion device, which is characterized in that: a unique long stator track unit module system is constructed, and comprises a beam unit and a long stator track assembly, so that the segmental structure of a stator core and the continuous scalability of a long stator coil are realized, the system can be simultaneously suitable for the suspension, guidance and traction driving of a high-speed magnetic suspension train and the running of an emergency running wheel, and a brand new longitudinal beam system, a fastener system, a longitudinal limiting system, a connecting rod system, a spring system and other subsystems are designed, so that the large-displacement stretching of the high-speed magnetic suspension traffic is realized. The method is not only suitable for a superposed beam scheme, but also suitable for a pure track beam scheme or a bridge scheme of paving track slabs on a bridge; the structure has small volume, clear stress and good durability; through the synergistic action of the connecting rod system and the spring system, the longitudinal gaps between any two long stator track unit module systems are equal in any telescopic state.
Description
Technical Field
The invention belongs to the field of high-speed magnetic levitation bridges, and particularly relates to a large-displacement telescopic device of a high-speed magnetic levitation bridge.
Background
The electrified suspension electromagnet on the suspension frame of the normally-conducting high-speed maglev train and the long stator iron core on the track are mutually attracted to provide suspension force for the train, the train is upwards attracted, and the stable suspension gap is ensured by controlling the suspension exciting current. The suspension gap between the electromagnet and the track is generally controlled to be 8mm-12 mm.
The electrified guide electromagnet on the suspension frame interacts with the guide plate on the side surface of the track to provide a guide force, so that a certain lateral distance is kept between the vehicle body and the track, and the non-contact guide in the horizontal direction is realized.
The high-speed maglev train is driven by a non-vehicle-mounted power device, namely a long stator Linear Synchronous Motor (LSM), a suspension electromagnet coil is arranged at the lower part of a vehicle suspension frame, a long stator coil is arranged on a track, and when the long stator coil arranged along the line direction provides three-phase frequency modulation and amplitude modulation power, a traveling wave magnetic field is formed and interacts with the vehicle-mounted suspension electromagnet, so that the complete non-contact traction and braking of the train in a suspension state are realized.
Patent document 1-patent application No. CN201120368867.4 "a large displacement bridge expansion device suitable for high-speed maglev traffic engineering", its technical scheme is: the large-displacement bridge expansion device comprises a track beam device, a plurality of connecting rod devices and a sliding device; the track beam device is arranged on the bridge deck of the main bridge through a sliding device; the track beam device comprises end track beams, a plurality of middle track beams and tail track beams which are sequentially arranged at intervals, wherein track beam gaps are respectively arranged between every two track beams; the connecting rod devices are respectively connected and arranged between every two adjacent track beams. The main design idea of the scheme is to disperse the expansion amount of the large-span bridge to a plurality of adjacent track beams, and ensure that the change of the gap between stator cores of the track beams is controlled within an allowable range.
However, the solution of patent document 1 has the following disadvantages:
1. the method is only suitable for a superposed beam scheme (i.e. a scheme of arranging a simply supported track beam on a bridge) and is not suitable for a pure track beam scheme or a bridge scheme of paving a track plate on the bridge;
2. the structure size is too large, the length of each hole of the track beam is at least more than 4 meters, and if the telescopic device is suitable for the telescopic amount of more than 1000mm, the length of the telescopic device can reach more than 40 meters;
3. the movable supports are numerous, the installation precision is not easy to control, and horizontal deformation with uneven gap sizes is easy to occur when a vehicle passes through.
However, the solution of patent document 2 has the following disadvantages:
1. the method is only suitable for a superposed beam scheme (i.e. a scheme of arranging a simply supported track beam on a bridge) and is not suitable for a pure track beam scheme or a bridge scheme of paving a track plate on the bridge;
2. the structure size is too large, the length of each hole of the track beam is at least more than 4 meters, and if the telescopic device is suitable for the telescopic amount of more than 1000mm, the length of the telescopic device can reach more than 40 meters;
3. the structure of the convex head and the concave head has defects, a plurality of weak points with local stress exist, and the structure is easy to crack and damage;
4. the raised head and the recessed head are prone to mutually collide under the action of vehicle braking force, and the durability of the structure is extremely poor under the long-term mutual collision action.
However, the technical solution of patent document 3 is only suitable for medium-low speed magnetic levitation traffic, and is not suitable for high-speed magnetic levitation. The principle of high-speed magnetic levitation on vehicle suspension, guidance and driving is completely different from that of medium-low speed traffic, and a large-displacement telescopic device suitable for high-speed magnetic levitation traffic is required.
The beam gap between two adjacent beam structures of the existing high-speed magnetic levitation traffic can stretch out and draw back by about +/-50 mm (the maximum beam gap distance is about 100mm), the magnetic levitation traffic crosses over barriers or rivers and needs to adopt a large-span bridge structure, the beam end gap stretching amount of the large-span bridge can reach more than 500mm to 1000mm, the existing stretching device can not meet the suspension, guidance and traction driving of the high-speed magnetic levitation traffic vehicle at the beam gap position and smoothly passes through the beam gap or has more technical defects, and the large-displacement stretching device meeting the requirements is required to be arranged at the beam gap position so as to meet the requirement of the high-speed magnetic levitation traffic for crossing over various large barriers or rivers and rivers.
Disclosure of Invention
Aiming at least one of the defects or the improvement requirements in the prior art, the invention provides a high-speed magnetic suspension bridge large-displacement telescopic device, which constructs a unique long stator track unit module system, realizes the segmentation of a stator core and the continuous scalability of a long stator coil, can simultaneously adapt to the suspension, guidance and traction driving of a high-speed magnetic suspension train and the running of an emergency running wheel, and also designs a brand new longitudinal beam system, a fastener system, a longitudinal limit system, a connecting rod system, a spring system and other subsystems, thereby realizing the large-displacement telescopic of the high-speed magnetic suspension traffic across various large obstacles or large rivers.
The high-displacement expansion device of the high-speed magnetic suspension bridge is not only suitable for a superposed beam scheme (namely a scheme of arranging a simply supported track beam on the bridge), but also suitable for a pure track beam scheme or a bridge scheme of paving a track plate on the bridge. The invention has small structure size and can realize larger longitudinal displacement expansion and contraction amount in a shorter structure length range. The invention has the advantages of clear structure stress and good durability. The invention can ensure that the longitudinal gaps between any two long stator track unit module systems are equal under any telescopic state through the synergistic action of the connecting rod system and the spring system.
In order to achieve the above object, according to one aspect of the present invention, there is provided a high-speed magnetic levitation bridge large displacement telescopic device, which is characterized in that: the magnetic suspension bridge is arranged in a groove on the upper edge of the beam end at two sides of a beam seam of the high-speed magnetic suspension bridge; the device comprises a longitudinal beam system, a long stator track unit module system, a fastener system, a longitudinal limiting system, a connecting rod system and a spring system;
a longitudinal beam system is longitudinally arranged on the beam joint in a spanning manner, and the support at least comprises a fixed spherical support at one end and a longitudinal movable support at the other end;
the longitudinal beam system is provided with a plurality of long stator track unit module systems at intervals along the longitudinal direction in a sliding manner through a plurality of fastener systems;
the single long stator track unit module system comprises a beam unit and a long stator track assembly;
the long stator track assembly comprises a sliding top plate, a magnetic guide plate, a whole body comprising pi-shaped steel, a stator core and a long stator coil, and is respectively fixed on the top surface, the side surface and the bottom surface of the two extending ends of the beam unit; the stator core is fixed at the lower part of the pi-shaped steel, the long stator coil is embedded in a groove of the stator core, and the long stator coil longitudinally and continuously spans gaps among the long stator track unit module systems;
a telescopic connecting rod system is arranged between two adjacent beam units to link the extension of each seam;
a longitudinally continuous spring system is arranged between two adjacent cross beam units to assist in equally dividing the expansion amount;
and a longitudinal limiting system is arranged between two adjacent beam units to carry out telescopic extreme value limiting protection on each gap.
Preferably, the longitudinal beam system comprises a longitudinal beam, a fixed spherical support, a first displacement amount longitudinal movable support and a second displacement amount longitudinal movable support;
the longitudinal movable support at the other end is a second displacement longitudinal movable support, a plurality of first displacement longitudinal movable supports are arranged between the longitudinal movable support and the fixed spherical support, and the displacement of the longitudinal movable supports is smaller than that of the second displacement longitudinal movable support.
Preferably, the beam unit of the long stator track unit module system comprises a beam top plate, a beam bottom plate and a beam web plate;
the two ends of the beam top plate are fixedly connected with the sliding top plate, the outer side end of the sliding top plate is fixedly connected with a magnetic guide plate perpendicular to the sliding top plate, a beam web transversely extends all the way to the inner side of the magnetic guide plate and is fixedly connected with the magnetic guide plate, and the two ends of the beam bottom plate are fixedly connected with the pi-shaped steel.
Preferably, the spring system comprises a longitudinal connecting spring, a spring end connection;
the two ends of the longitudinal connecting spring are fixedly connected to the two sides of the beam webs, and the longitudinal connecting spring is arranged between the beam web at the two longitudinal ends and the spring end connecting piece arranged on the beam part structure of the fixed side bridge and the beam part structure of the movable side bridge respectively to form a longitudinally continuous spring system.
Preferably, the longitudinal connecting spring has a certain pre-pressure (namely, in a pre-compression state) in a normal working state of the high-speed magnetic suspension bridge large-displacement expansion device, and the specific pre-pressure is calculated and determined according to the stress requirement of the expansion device. Preferably, the longitudinal limiting system comprises a longitudinal limiter and a longitudinal limiter end fixing piece;
the longitudinal limiter is fixed at the lower part of the beam bottom plate, is of a plate structure and comprises a T-shaped plate and a concave clamping plate which are mutually nested front and back, and the longitudinal movable distance of the T-shaped plate in the concave clamping plate is the maximum distance of two adjacent long stator track unit module systems;
the longitudinal limiting device is fixedly connected with the end fixing part of the longitudinal limiting device arranged on the fixed side bridge beam part structure and the movable side bridge beam part structure at the longitudinal two ends respectively.
Preferably, the connecting rod system comprises a connecting rod, a connecting rod central rotating shaft, a connecting rod transverse movable hinge and a connecting rod end rotating shaft;
the cross beam web plate is provided with an opening, the connecting rod center rotating shaft is fixed along the vertical center line of the opening and penetrates through a circular hole in the center of the X-shaped connecting rod, the connecting rod can freely rotate around the connecting rod center rotating shaft, and the end parts of the connecting rods connected on the adjacent long stator track unit module systems are connected through the connecting rod end rotating shaft and can rotate around the connecting rod end rotating shaft;
at the two longitudinal ends, the end parts of the connecting rods are connected with the connecting rods on the fixed side bridge beam part structure and the movable side bridge beam part structure in a transverse movable hinge mode through the rotating shafts at the end parts of the connecting rods, and the connecting rods at the positions can rotate around the rotating shafts at the end parts of the connecting rods and can horizontally move along the transverse direction.
Preferably, a single said fastener system comprises a fastener, a fastener mount, a fastener riser pad, a vibration dampening pad;
the upper portion of the fastener is an upper cover plate, the lower portions of two sides of the upper cover plate are provided with buckling plates, the upper cover plate and the buckling plates are fixed to the lower portion of the cross beam bottom plate, the upper cover plate and the buckling plates of the fastener form a clamping structure, the structure clamps and embraces a top plate of a longitudinal beam of the longitudinal beam system downwards, and therefore the long stator track unit module system can move on the longitudinal beam along the longitudinal direction.
Preferably, a fastener height-adjusting base plate is arranged between the fastener and the beam bottom plate and used for adjusting the height of the track structure during installation or operation.
Preferably, a vibration damping base plate is arranged between the fastener and a top plate of a longitudinal beam of the longitudinal beam system, and is used for adjusting the supporting rigidity of the long stator track unit module system so as to reduce vibration.
Preferably, the longitudinal length L of the single long stator track unit module system is an integer multiple of the basic length module of the stator core.
Preferably, the total length of the high-speed magnetic suspension bridge large-displacement expansion device is K, and the sum of the accumulated distance between the adjacent long stator track unit module systems and the distances between the long stator track unit module systems and the fixed side bridge beam structure and the movable side bridge beam structure is the total gap width D, wherein D is less than or equal to 10% of K.
The above-described preferred features may be combined with each other as long as they do not conflict with each other.
Compared with the patent document 1 of the applicant in the medium-low speed magnetic levitation field, the high-displacement expansion device of the high-speed magnetic levitation bridge has obvious differences in the following aspects, and is also the key point of the invention. The technical scheme of the invention has the following obvious beneficial effects:
(1) the longitudinal length of the long stator track unit module system is an integral multiple of the basic length modulus of the stator core, the segmentation of the stator core and the continuous scalability of the long stator coil are realized, and the system can be simultaneously suitable for suspension, guidance, traction driving and emergency running of a high-speed magnetic suspension train.
(2) A longitudinally continuous spring system is arranged between two adjacent long stator track unit module systems, and when the bridge longitudinally displaces and the beam joint stretches, the connecting rod system can be assisted to timely respond to the equal division of the gaps between the long stator track unit module systems.
(3) The longitudinal limiting system is arranged between the two adjacent long stator track unit module systems, so that the longitudinal gap between any two long stator track unit module systems can be ensured not to exceed a specified limit value under special conditions such as instantaneous emergency braking and the like, and the high-speed driving safety is ensured.
(4) The longitudinal beam system is designed into a multi-span continuous beam structure system, and larger expansion amount can be realized on the premise of not increasing the height of the longitudinal beam when the expansion amount is larger and the longitudinal beam span is larger.
(5) By arranging the multiple height-adjusting base plates (the fastener height-adjusting base plates are arranged between the long stator track unit module system and the fastener system, and the support height-adjusting base plates are arranged between the support and the longitudinal beam) and arranging the quadrilateral holes with the round chamfers on the fastener system, the accurate adjustment of the height and the plane position of the track can be realized during the installation period or the operation period.
(6) By adopting the connecting rod system with the center of the central rotating shaft coinciding with the center of the long stator track unit module system, the seam width equal division between the long stator track unit module systems can be more accurate.
(7) In any expansion state, the total gap width D is equal to D1+D2+D3+……+Dn-1+DnNot more than 10% of the total length K of the large displacement telescopic device.
Compared with patent documents 2 and 3, the high-displacement telescopic device for the high-speed magnetic suspension bridge has the following obvious beneficial effects:
(1) the high-displacement expansion device of the high-speed magnetic suspension bridge is not only suitable for a superposed beam scheme (namely a scheme of arranging a simply supported track beam on the bridge), but also suitable for a pure track beam scheme or a bridge scheme of paving a track plate on the bridge.
(2) The invention has small structure size and can realize larger longitudinal displacement expansion and contraction amount in a shorter structure length range.
(3) The invention has the advantages of clear structure stress and good durability.
(4) The invention can ensure that the longitudinal gaps between any two long stator track unit module systems are equal under any telescopic state through the synergistic action of the connecting rod system and the spring system.
Drawings
Fig. 1 is an elevation view of a high-speed magnetic levitation bridge large displacement telescopic device according to an embodiment of the present invention (the link system and the spring system are not shown, see also fig. 6);
FIG. 2 is a schematic cross-sectional view taken along section 1-1 of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along section 2-2 of FIG. 1;
FIG. 4 is a schematic cross-sectional view taken along section 3-3 of FIG. 1;
FIG. 5 is a schematic cross-sectional view taken along section 4-4 of FIG. 2 (the linkage system, spring system not shown, see also FIG. 6);
FIG. 6 is a schematic cross-sectional view taken along section 5-5 of FIG. 2;
FIG. 7 is a schematic cross-sectional view taken along section 6-6 of FIG. 2;
FIG. 8 is a schematic cross-sectional view taken along section 7-7 of FIG. 2;
FIG. 9 is a schematic cross-sectional view taken along section 8-8 of FIG. 2;
FIG. 10 is a schematic cross-sectional view taken along section 9-9 of FIG. 3;
FIG. 11 is a schematic cross-sectional view taken along section 10-10 of FIG. 3;
FIG. 12 is a schematic cross-sectional view taken along section 11-11 of FIG. 3;
FIG. 13 is a schematic cross-sectional view taken along section 12-12 of FIG. 3;
FIG. 14a is a diagrammatic view of the linkage system of FIG. 6;
FIG. 14b is a schematic cross-sectional view taken at section A-A of FIG. 14 a;
FIG. 14c is a schematic cross-sectional view taken at section B-B of FIG. 14 a;
FIG. 14d is a perspective view of the connecting rod central shaft;
FIG. 14e is a schematic view of the shaft at the end of the connecting rod;
FIG. 15a is a perspective view of a laterally movable hinge of the connecting rod;
FIG. 15b is a cross-sectional view of FIG. 15 a;
FIG. 16 is a perspective view of the longitudinal stop of FIG. 7;
fig. 17a is a schematic structural change diagram of an assembling step S1 of the construction and assembly method of the high-speed magnetic levitation bridge large displacement telescopic device according to the embodiment of the present invention;
fig. 17b is a schematic structural change diagram of an assembling step S2 of the construction and assembly method of the high-speed magnetic levitation bridge large displacement telescopic device according to the embodiment of the present invention;
fig. 17c is a schematic structural change diagram of an assembling step S3 of the construction and assembly method of the high-speed magnetic levitation bridge large displacement telescopic device according to the embodiment of the present invention;
fig. 17d is a schematic structural change diagram of an assembling step S4 of the construction and assembly method of the high-speed magnetic levitation bridge large displacement telescopic device according to the embodiment of the present invention;
fig. 17e is a schematic structural change diagram of an assembling step S5 of the construction and assembly method of the high-speed magnetic levitation bridge large displacement telescopic device according to the embodiment of the present invention;
fig. 17f is a schematic structural change diagram of an assembling step S6 of the construction and assembly method of the high-speed magnetic levitation bridge large displacement telescopic device according to the embodiment of the invention;
fig. 17g is a schematic structural change diagram of an assembling step S7 of the construction and assembly method of the high-speed magnetic levitation bridge large displacement telescopic device according to the embodiment of the present invention;
fig. 17h is a schematic structural change diagram of an assembling step S8 of the construction and assembly method of the high-speed magnetic levitation bridge large displacement telescopic device according to the embodiment of the present invention;
fig. 17i is a schematic structural change diagram of an assembling step S9 of the construction and assembly method of the high-speed magnetic levitation bridge large displacement telescopic device according to the embodiment of the invention;
fig. 18 is a schematic flow chart of a construction and assembly method of the high-speed magnetic levitation bridge large displacement telescopic device according to the embodiment of the invention.
In all the figures, the same reference numerals denote the same features, in particular:
1-sliding top plate, 2-crossbeam top plate, 3-crossbeam bottom plate, 4-crossbeam web plate, 5-long stator horizontal reinforcing plate, 6-magnetic guide plate, 7-long stator vertical reinforcing plate, 8-long stator inner side reinforcing plate, 9-crossbeam fulcrum reinforcing plate, 10-pi shaped steel, 11-stator iron core, 12-stator iron core anchor bolt, 13-long stator coil, 14-connecting rod, 15-connecting rod central rotating shaft, 16-longitudinal connecting spring, 16 '-longitudinal temporary fixed steel bar, 17-longitudinal beam, 17' -longitudinal beam temporary extension section, 18-fastener, 19-longitudinal limiter, 20-fixed spherical support, 21-small-displacement longitudinal movable support, 22-large-displacement longitudinal movable support, 23-fixed side bridge beam part structure, 24-movable side bridge beam part structure, 25-connecting rod transverse movable hinge, 26-spring end connecting steel plate, 27-longitudinal limiter fixing bolt, 28-fastener fixing bolt, 29-longitudinal limiter end fixing steel plate, 30-support fixing bolt, 31-heightening base plate above fastener, 32-damping base plate and 33-connecting rod end rotating shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The present invention will be described in further detail with reference to specific embodiments.
As shown in fig. 1, grooves are respectively arranged on the upper edges of the beam ends of the fixed-side bridge beam structure 23 and the movable-side bridge beam structure 24 for mounting a high-speed magnetic levitation bridge large-displacement expansion device.
As shown in fig. 1-16, the high-speed magnetic suspension bridge large displacement expansion device is composed of a longitudinal beam system, a long stator track unit module system, a fastener system, a longitudinal spacing system, a connecting rod system, a spring system and other subsystems, wherein the subsystems are as follows:
1. longitudinal beam system
The longitudinal beam system comprises a longitudinal beam 17, a fixed spherical support 20, a first displacement longitudinal movable support such as a small displacement longitudinal movable support 21, a second displacement longitudinal movable support (such as a large displacement longitudinal movable support 22) and a support fixing member (such as a support fixing bolt 30).
2. Long stator track unit module system
The single long stator track unit module system comprises a beam unit, a long stator track assembly and a reinforcing piece;
the beam unit comprises a beam top plate 2, a beam bottom plate 3 and a beam web plate 4;
the long stator track assembly comprises a sliding top plate 1, a magnetic guide plate 6, a whole body comprising pi-shaped steel 10, a stator core 11 and a long stator coil 13, and a stator core anchoring bolt 12;
the reinforcing part comprises a long stator horizontal reinforcing plate 5, a long stator vertical reinforcing plate 7, a long stator inner side reinforcing plate 8 and a cross beam fulcrum reinforcing plate 9.
3. Fastener system
The single fastener system includes a fastener 18, a fastener securing member (e.g., fastener securing bolt 28), a fastener raising pad 31, and a damping pad 32.
4. Longitudinal limiting system
The longitudinal restraint system includes a longitudinal restraint 19, a longitudinal restraint mount (longitudinal restraint mount bolt 27), and a longitudinal restraint end mount (e.g., longitudinal restraint end mount steel plate 29).
5. Connecting rod system
The connecting rod system comprises a connecting rod 14, a connecting rod central rotating shaft 15, a connecting rod transverse movable hinge 25 and a connecting rod end rotating shaft 33.
6. Spring system
The spring system includes a longitudinally connected spring 16, a spring end connector (e.g., spring end connector plate 26).
As shown in fig. 1-3, the longitudinal beam 17 is arranged along the longitudinal direction of the bridge and spans the beam gap between the fixed-side bridge beam structure 23 and the movable-side bridge beam structure 24, the longitudinal beam 17 is bolted with the fixed spherical support 20, the small-displacement longitudinal movable support 21 and the large-displacement longitudinal movable support 22 through the support fixing bolt 30, the fixed spherical support 20 and the small-displacement longitudinal movable support 21 are anchored at the bottom of the groove formed in the fixed-side bridge beam structure 23 through the support fixing bolt 30, and the large-displacement longitudinal movable support 22 is anchored at the bottom of the groove formed in the movable-side bridge beam structure 24 through the support fixing bolt 30. The longitudinal beam 17 is provided with a fixed spherical support 20 at the left end, a large-displacement longitudinal movable support 22 at the right end, according to the structural stress and deformation requirements, a plurality of small-displacement longitudinal movable supports 21 and a large-displacement longitudinal movable support 22 are arranged between the fixed spherical support 20 and the large-displacement longitudinal movable support 22 along the longitudinal beam direction, wherein a plurality of small-displacement longitudinal movable supports 21 are arranged on a fixed side bridge beam structure 23, a plurality of large-displacement longitudinal movable supports 22 are arranged on a movable side bridge beam structure 24, and the longitudinal beam system is a multi-span continuous beam structure system. The longitudinal beam 17 section can adopt a steel structure box section, an H-shaped section, an I-shaped section or other special-shaped sections. The total length of the longitudinal beam 17 is determined by comprehensive calculation according to the total length, the total width of the expansion joint and the total expansion amount of all the long stator track unit module systems and a certain margin. The movable side bridge beam part structure 24 corresponding to the right end part of the longitudinal beam 17 is partially provided with a hole for longitudinal movement of the longitudinal beam during expansion and contraction.
As shown in fig. 1 and 9, the longitudinal horizontal distance between any two of the fixed ball-type support 20, the small-displacement longitudinal movable support 21 and the large-displacement longitudinal movable support 22 is preferably 1.0m to 3.0 m.
Preferably, the longitudinal beam 17 section is a steel structure box section, and a box top plate of the steel structure box section extends to the outer side of the web plate to form a longitudinal sliding surface of the fastener system.
As shown in fig. 8, preferably, two longitudinal beams 17 are arranged in the transverse direction, and a transverse connecting rod can be arranged between the two longitudinal beams 17 according to the requirement of stress.
Preferably, height adjusting base plates are arranged between the top plates of the fixed spherical support 20, the small-displacement longitudinal movable support 21 and the large-displacement longitudinal movable support 22 and the bottom plate of the longitudinal beam 17, and can be used for adjusting the elevation of the structure during installation and operation and maintenance.
Specially, when the large displacement expansion device of the high-speed magnetic levitation bridge has smaller expansion amount, the length of the longitudinal beam 17 is shorter, at this time, the middle small displacement longitudinal movable support 21 and the middle large displacement longitudinal movable support 22 can be cancelled, only one fixed spherical support 20 at the leftmost end on the fixed side bridge beam structure 23 and one large displacement longitudinal movable support 22 at the rightmost end on the movable side bridge beam structure 24 are reserved, and the longitudinal beam system at this time is a single-span simple support structure system.
And sequentially and continuously arranging a plurality of long stator track unit module systems on the longitudinal beam system according to the total expansion amount.
As shown in fig. 3-4 and 10-13, a beam top plate 2, a beam bottom plate 3 and a beam web plate 4 form an i-shaped cross beam, two ends of the beam top plate 2 are welded with a sliding top plate 1, the outer side end of the sliding top plate 1 is welded with a magnetic guide plate 6 perpendicular to the sliding top plate 1, the beam web plate 4 transversely extends to the inner side of the magnetic guide plate 6 and is welded with the magnetic guide plate 6, two ends of the beam bottom plate 3 are welded with pi-shaped steel 10, the pi-shaped steel 10 is simultaneously welded with the lower edge of the beam web plate 4, a long stator vertical reinforcing plate 7 is welded between the pi-shaped steel 10 and the beam top plate 2, the outer side of the pi-shaped steel 10 is directly welded with the magnetic guide plate 6 with a long stator horizontal reinforcing plate 5, a stator core 11 is fixed at the lower part of the pi-shaped steel 10 through a stator core anchoring bolt 12, a long stator coil 13 is embedded in a groove of the stator core 11, the long stator coils 13 are longitudinally continuous across the gap between each long stator track unit module system. And a long stator inner side reinforcing plate 8 is vertically welded on the vertical sliding top plate 1 near the welding line of the cross beam top plate 2 and the sliding top plate 1. And a beam fulcrum reinforcing plate 9 is welded between the beam top plate 2 and the beam bottom plate 3 at the position of the longitudinal beam supporting beam.
As shown in fig. 6 and 13, the longitudinal connecting spring 16 is welded to the beam web 4 between the long stator inner side reinforcing plate 8 and the beam fulcrum reinforcing plate 9, both ends of the longitudinal connecting spring 16 are welded to the beam web 4, and the leftmost side and the rightmost side are respectively welded to the spring end connecting steel plates 26 embedded in the fixed side beam structure 23 and the movable side beam structure 24.
Preferably, the longitudinal connecting spring 16 should have a certain pre-pressure (i.e. be in a pre-compression state) in a normal working state of the high-speed magnetic suspension bridge large displacement expansion device, and the specific pre-pressure is calculated and determined according to the stress requirement of the expansion device.
As shown in fig. 14a-15b, the central position of the beam web 4 is perforated, and a connecting rod central rotating shaft 15 is welded along the vertical symmetrical center line position of the center line beam, the connecting rod central rotating shaft 15 passes through a circular hole in the center of the connecting rod 14, the connecting rod 14 can freely rotate around the connecting rod central rotating shaft 15, the ends of the connecting rods 14 connected on the adjacent long stator track unit module systems are connected through a connecting rod end rotating shaft 33, and can rotate around the connecting rod end rotating shaft 33. At the leftmost end and the rightmost end of the large displacement telescopic device, the end part of the connecting rod 14 is connected with a connecting rod transverse movable hinge 25 pre-embedded on the fixed side bridge beam structure 23 and the movable side bridge beam structure 24 through a connecting rod end part rotating shaft 33, and the connecting rod 14 at the position can rotate around the connecting rod end part rotating shaft 33 and can horizontally move along the transverse direction.
Through the synergistic action of the connecting rod system and the spring system, the longitudinal gaps between any two long stator track unit module systems are equal in any telescopic state.
As shown in fig. 1 and 5, the longitudinal length of a single long stator track unit module system is L, the total length of the high-speed magnetic levitation bridge large displacement telescopic device is K, and the distance between adjacent long stator track unit module systems and the distance between the adjacent long stator track unit module systems and the fixed side bridge beam structure 23 and the movable side bridge beam structure 24 are D from left to right in sequence1、D2、D3、……Dn-1、Dn。
In the non-vehicle state, when the initial installation of the large displacement telescopic device is completed at the annual average temperature, the distance between the adjacent long stator track unit module systems and the distance D between the adjacent long stator track unit module systems and the fixed-side bridge beam structure 23 and the movable-side bridge beam structure 24 are ensured1、D2、D3、……Dn-1、DnEqual and can be extended and retracted the same distance.
Preferably, the longitudinal length L of the single long stator track unit module system should be an integer multiple of the fundamental length module of the stator core 11. It is further preferred that the longitudinal length L of the single long stator track unit module system should be an integer multiple of the fundamental length module 0.516m of the stator core 11.
Preferably, in any expansion state, the total gap width D ═ D1+D2+D3+……+Dn-1+DnAnd should not be more than 10% of the total length K of the large displacement telescopic device.
Preferably, the distance between adjacent long stator track unit module systems and its beam structure 23, the movable side bridge, with the fixed sideDistance D between side bridge beam structures 241、D2、D3、……Dn-1、DnAnd is 0mm to 100 mm.
As shown in fig. 2-4, the fastener system is disposed between the longitudinal beam system and the long stator track unit module system, the upper portion of the fastener 18 is an upper cover plate, the lower portions of both sides of the upper cover plate are provided with fastening plates, the upper cover plate and the fastening plates are both provided with bolt holes, and are anchored on the lower portion of the cross beam bottom plate 3 through fastener fixing bolts 28, the upper cover plate of the fastener 18 and the fastening plates form a clasping structure, and the clasping structure clasps the top plate of the longitudinal beam 17 downwards, so that the long stator track unit module system can move on the longitudinal beam 17 along the longitudinal direction.
As shown in fig. 12-13, a fastener elevation pad 31 is preferably provided between the fastener 18 and the beam floor 3, and may be used to adjust the elevation of the track structure during installation or operation.
Preferably, the bolt holes in the fasteners 18 are chamfered quadrilateral holes that can be used to adjust the horizontal position of the rail structure during installation or operation.
As shown in fig. 12 to 13, a vibration damping shim plate 32 is preferably arranged between the fastening member 18 and the top plate of the longitudinal beam 17, and is used for adjusting the supporting rigidity of the long stator track unit module system, so as to play a role of vibration damping.
As shown in fig. 2-4, 7 and 16, the longitudinal stopper 19 is fixed at the lower part of the center of the beam bottom plate 3 by a longitudinal stopper fixing bolt 27, the longitudinal stopper 19 is of a plate type structure and is formed by a T-shaped plate and a concave clamping plate which are nested with each other, and the longitudinal movable distance of the T-shaped plate in the concave clamping plate is the maximum distance of two adjacent long stator track unit module systems. The longitudinal stopper 19 is welded and connected to the longitudinal stopper end fixing steel plates 29 embedded in the fixed-side bridge beam portion structure 23 and the movable-side bridge beam portion structure 24 at the leftmost side and the rightmost side, respectively.
Preferably, when the total length K of the large displacement telescopic device is less than 3m, the longitudinal movable distance of the T-shaped plate of the longitudinal stopper 19 in the concave clamping plate is not more than the maximum allowable elongation of the long stator coil 13; further preferably, when the total length K of the large displacement telescopic device is less than 3m, the longitudinal movable distance of the T-shaped plate of the longitudinal stopper 19 in the concave catch plate is not more than 100 mm.
Preferably, when the total length K of the large displacement telescopic device is greater than 3m, the longitudinal movable distance of the T-shaped plate of the longitudinal stopper 19 in the concave catch plate is not more than 50 mm.
The action process of the high-speed magnetic suspension bridge large-displacement expansion device is as follows:
when the movable side bridge beam part structure 24 is displaced longitudinally, on one hand, the large-displacement longitudinal movable support 22 fixed on the movable side bridge beam part structure is driven to slide longitudinally, and on the other hand, the embedded spring end connecting steel plate 26, the connecting rod transverse movable hinge 25 and the longitudinal stopper end fixing steel plate 29 on the movable side bridge beam part structure 24 all move longitudinally together. The longitudinal movement of the connecting rod transverse movable hinge 25 and the spring end connecting steel plate 26 drives the connecting rod system and the spring system to move longitudinally integrally and enables the longitudinal gaps between any two long stator track unit module systems to be equal. The longitudinal limiting system can ensure that the longitudinal gap between any two long stator track unit module systems does not exceed a specified limit value under special conditions such as instant emergency braking and the like.
As shown in fig. 17a to 17i and fig. 18, the method for constructing and assembling the high-speed magnetic levitation bridge large displacement expansion device of the invention comprises the following steps:
and (3) assembling in a factory:
s1, mounting temporary lengthened sections 17' of the longitudinal beams with the same cross section at the ends of longitudinal movable supports of the longitudinal beams 17 of the longitudinal beam system, and fixing support supports on a temporary mounting platform of a factory;
s2, assembling the long stator track unit module system except the long stator coil 13, and assembling the link system;
s3, fixing the long stator track unit module systems except the long stator coil 13 on the longitudinal beam 17 one by adopting a fastener system, and connecting rod systems between all adjacent long stator track unit module systems;
finely adjusting the installation elevation and the transverse position of each long stator track unit module system;
rotating the connecting rod system to enable the longitudinal distance between the adjacent long stator track unit module systems to be in the maximum state, and expanding the part exceeding the longitudinal beam 17 onto the temporary extension section 17' of the longitudinal beam;
s4, installing longitudinal connecting springs 16 of a spring system on two sides of the beam unit;
a longitudinal temporary fixing piece is adopted to be inserted from one end to the other end along the central axis of the longitudinal connecting spring 16, and both ends are provided with adjustable pressing devices;
s5, fixing one end of the longitudinal temporary fixing piece, adjusting the adjustable pressing device at the other end to enable the longitudinal connecting spring 16 to be gradually pressed, simultaneously driving the long stator track unit module system to move and the connecting rod system to simultaneously rotate, stopping adjustment until the positions of the spring system, the connecting rod system and the long stator track unit module system move to the designed installation position, and cutting off redundant longitudinal temporary fixing pieces;
cutting off the temporary extension section of the longitudinal beam, and finishing the right side end part of the longitudinal beam;
s6, mounting a longitudinal limiting system at the lower part of the beam unit;
the mounting work in the factory assembly stage is finished, the support and the temporary mounting platform in the factory are fixed, and the temporary mounting platform is assembled on site;
and (3) field assembly stage:
s7, reserving grooves on the upper edges of beam ends at two sides of a beam seam of the high-speed magnetic levitation bridge, and not constructing the bridge structure above the opening at the position corresponding to the bridge at the movable support side of the longitudinal beam 17;
aligning the positions of the supporting support and the embedded part in the groove, and after finely adjusting the elevation and the plane position, fastening and connecting;
s8, constructing a bridge structure above the opening of the movable support side of the longitudinal beam 17 corresponding to the position of the bridge;
s9, fixing the longitudinal ends of the spring system, the longitudinal limiting system and the connecting rod system on the side wall of the groove respectively;
cutting off the longitudinal temporary fixing piece in the longitudinal connecting spring 16;
wherein the long stator coil 13 of the long stator track unit module system is installed before the factory shipment in step S6 or on site in step S9.
The detailed embodiment is as follows.
And (3) assembling in a factory:
step S1:
the longitudinal beam system is installed, a longitudinal beam temporary extension section 17 'is arranged at one end of the rightmost end part of the longitudinal beam 17, the longitudinal beam temporary extension section 17' can also be manufactured together with the longitudinal beam 17, and the cross section of the longitudinal beam temporary extension section is the same as that of the longitudinal beam 17. The upper edges of the fixed spherical support 20, the small-displacement longitudinal movable support 21 and the large-displacement longitudinal movable support 22 are respectively fixedly connected with the lower edge of the longitudinal beam 17 through bolts, and the lower edges of the fixed spherical support 20, the small-displacement longitudinal movable support 21 and the large-displacement longitudinal movable support 22 are temporarily fixed on a temporary mounting platform of a factory through bolts.
Step S2:
1. the long stator track unit module system is assembled except for the long stator coil 13. Specifically, firstly, an I-shaped cross section formed by a beam top plate 2, a beam bottom plate 3 and a beam web plate 4 is welded, on the basis, a sliding top plate 1, a magnetic guide plate 6, a long stator vertical reinforcing plate 7, a long stator horizontal reinforcing plate 5, pi-shaped steel 10, a long stator inner side reinforcing plate 8 and a beam fulcrum reinforcing plate 9 are welded in sequence, and then a stator core 11 is fixed on the lower portion of the pi-shaped steel 10 through a stator core anchoring bolt 12. And assembling each long stator track unit module system except the long stator coil 13 one by one according to the method.
2. And (5) assembling a connecting rod system. Specifically, the method comprises the following steps: two connecting rods 14 are crossed at the center position, a connecting rod center rotating shaft 15 is inserted into a round hole at the crossing position of the connecting rods 14, the center of the connecting rod center rotating shaft 15 is overlapped with the center of the connecting rods 14, and annular plates are sleeved at two ends of the connecting rod center rotating shaft 15 respectively to be attached to the outer surfaces of the connecting rods 14 and welded on the connecting rod center rotating shaft 15.
3. The connecting rod central rotating shaft 15 is overlapped with the center of the long stator track unit module system and welded on the long stator track unit module system.
Step S3:
1. the long stator track unit module systems except the long stator coil 13 are fixed on the longitudinal beam 17 one by a fastener system, two connecting rods 14 between the adjacent long stator track unit module systems are rotated to align the end round holes, and a connecting rod end rotating shaft 33 penetrates through the aligned round holes and is fixed. And repeating the method, and connecting the connecting rods 14 between all the adjacent long stator track unit module systems.
2. The thickness of the fastener heightening base plate 31 is adjusted so that the installation height of each long stator track unit module system meets the specified installation accuracy requirement, and the transverse position of the fastener 18 makes the transverse position of each long stator track unit module system meet the specified installation accuracy.
3. And rotating the connecting rod system to enable the longitudinal distance between two adjacent long stator track unit module systems to be in the maximum state.
Step S4:
1. between two adjacent long stator track unit module systems, two ends of the longitudinal connecting spring 16 are respectively welded with the beam web 4, one end of the longitudinal connecting spring 16 at the outermost side is welded with the beam web 4, and the other end is welded with the spring end connecting steel plate 26. The above method is repeated to complete the installation of all the longitudinal connecting springs 16.
2. A longitudinal temporary fixing piece, such as a longitudinal temporary fixing steel bar 16 ', is adopted to penetrate from the left end to the right end along the central axis of the longitudinal connecting spring 16, and local round holes are formed in the positions, corresponding to the steel plates, through which the longitudinal temporary fixing steel bar 16' passes. The two ends of the longitudinal temporary fixing steel bar 16' are provided with screw threads at the two ends of the temporary fastening steel bar of the nut at the outer side of the spring end connecting steel plate 26. The above process is repeated to install additional spring-centered longitudinal temporary fixation rods 16'.
Step S5:
1. fixing the left end of a longitudinal temporary fixed steel bar 16 ', simultaneously screwing nuts at the right ends of all the longitudinal temporary fixed steel bars 16 ' to gradually compress a longitudinal connecting spring 16, simultaneously driving a long stator track unit module system to simultaneously rotate towards a left side moving connecting rod system, gradually moving left together with the long stator track unit module system, stopping screwing the bolts until the positions of the spring system, the connecting rod system and the long stator track unit module system move to designed installation positions, and cutting off redundant longitudinal temporary fixed steel bars 16 ' on the right side.
2. And cutting off the temporary lengthened section 17' of the longitudinal beam, trimming the right side end part of the longitudinal beam, and welding an end sealing plate of the end part.
Step S6:
1. the longitudinal stopper 19 is mounted on the lower portion of the beam bottom plate 3 with a longitudinal stopper fixing bolt 27. The above method is repeated to complete the installation of all the longitudinal stoppers 19. At the leftmost and rightmost ends, the longitudinal stopper 19 is welded to the longitudinal stopper end fixing steel plate 29.
2. After the steps are completed, the installation work in the assembling stage of the factory is completed, the temporary fixing bolts of the fixed spherical support 20, the small-displacement longitudinal movable support 21 and the large-displacement longitudinal movable support 22 on the installation platform are released, and the installed high-speed magnetic suspension bridge large-displacement telescopic device product and related spare and accessory parts are sent to the field for assembly.
And (3) field assembly stage:
step S7:
1. the mounting grooves of the high-speed magnetic levitation bridge large displacement telescopic device are reserved on the fixed side bridge beam structure 23 and the movable side bridge beam structure 24, wherein for convenience of mounting operation, the bridge structural steel or concrete above the opening of the right side of the longitudinal beam 17 corresponding to the bridge position is not constructed.
2. Aligning all bolt holes of the fixed spherical support 20, the small-displacement longitudinal movable support 21 and the large-displacement longitudinal movable support 22 with the positions of anchoring sleeves reserved on the fixed side bridge beam structure 23 and the movable side bridge beam structure 24, finely adjusting the elevation and the plane positions of the anchor sleeves through temporary cushion blocks and the like below the supports, and then screwing all support fixing bolts 30.
Step S8:
and the right side of the construction longitudinal beam 17 corresponds to bridge structural steel or concrete above the opening of the bridge position.
Step S9:
1. and the spring end connecting steel plate 26, the longitudinal stopper end fixing steel plate 29 and the connecting rod transverse movable hinge 25 are respectively connected with the fixed-side bridge beam structure 23 and the movable-side bridge beam structure 24 by adopting a welding or bolt connection mode. The connecting rod transverse movable hinge 25 is connected with the connecting rod 14 through a connecting rod end rotating shaft 33.
2. The longitudinal temporary fixing steel bar 16' in the longitudinal connecting spring 16 is cut off.
Among them, the following two methods of mounting the long stator coil of the long stator track unit module system are possible.
The method comprises the following steps: the installation is completed at the end of step S6, i.e., before the product is shipped. In this case, the long stator coil is independent, and a connecting joint is required to be arranged between the long stator coil and the long stator of the bridge at two sides.
The method 2 comprises the following steps: and finally installed at step S9. At the moment, the long stator coils of the bridges on the two sides can be installed together without joints; can also be independently installed and provided with a joint.
The long stator coils 13 of the long stator track unit module system are installed before the factory shipment in step S6 or on site in step S9.
The construction and assembly method of the high-speed magnetic suspension bridge large-displacement expansion device solves the problem of pre-pressure installation of a spring system through temporary construction measures such as a longitudinal beam temporary extension section, a longitudinal temporary fixing steel bar in a longitudinal connecting spring and the like.
The construction and assembly method of the high-speed magnetic suspension bridge large-displacement expansion device solves the problem of quick and effective installation of the longitudinal limiting system, the connecting rod system and the spring system in a limited installation operation space.
The construction and assembly method of the high-speed magnetic suspension bridge large-displacement expansion device solves the problem that the longitudinal beam of the large-displacement expansion device stretches into the opening position of the right bridge and is inconvenient to install by arranging the rear construction section on the right side.
The construction and assembly method of the high-speed magnetic suspension bridge large-displacement expansion device solves the problem of accurate adjustment of the rail elevation and the plane position during installation by the aid of multiple height-adjusting base plates (a fastener height-adjusting base plate is arranged between a long stator rail unit module system and a fastener system, a support height-adjusting base plate is arranged between a support and a longitudinal beam), the fastener system is provided with a quadrilateral hole with a round chamfer, and the like.
In summary, compared with the prior art, the scheme of the invention has the following significant advantages:
compared with the patent document 3 of the applicant in the medium-low speed magnetic levitation field, the high-displacement expansion device of the high-speed magnetic levitation bridge has obvious differences in the following aspects, and is also the core point of the invention. The technical scheme of the invention has the following obvious beneficial effects:
(1) the longitudinal length of the long stator track unit module system is an integral multiple of the basic length modulus of the stator core, the segmentation of the stator core and the continuous scalability of the long stator coil are realized, and the system can be simultaneously suitable for suspension, guidance, traction driving and emergency running of a high-speed magnetic suspension train.
(2) A longitudinally continuous spring system is arranged between two adjacent long stator track unit module systems, and when the bridge longitudinally displaces and the beam joint stretches, the connecting rod system can be assisted to timely respond to the equal division of the gaps between the long stator track unit module systems.
(3) The longitudinal limiting system is arranged between the two adjacent long stator track unit module systems, so that the longitudinal gap between any two long stator track unit module systems can be ensured not to exceed a specified limit value under special conditions such as instantaneous emergency braking and the like, and the high-speed driving safety is ensured.
(4) The longitudinal beam system is designed into a multi-span continuous beam structure system, and larger expansion amount can be realized on the premise of not increasing the height of the longitudinal beam when the expansion amount is larger and the longitudinal beam span is larger.
(5) By arranging the multiple height-adjusting base plates (the fastener height-adjusting base plates are arranged between the long stator track unit module system and the fastener system, and the support height-adjusting base plates are arranged between the support and the longitudinal beam) and arranging the quadrilateral holes with the round chamfers on the fastener system, the accurate adjustment of the height and the plane position of the track can be realized during the installation period or the operation period.
(6) By adopting the connecting rod system with the center of the central rotating shaft coinciding with the center of the long stator track unit module system, the seam width equal division between the long stator track unit module systems can be more accurate.
(7) In any expansion state, the total gap width D is equal to D1+D2+D3+……+Dn-1+DnNot more than 10% of the total length K of the large displacement telescopic device.
Compared with patent documents 1 and 2, the high-displacement telescopic device for the high-speed magnetic suspension bridge has the following obvious beneficial effects:
(1) the high-displacement expansion device of the high-speed magnetic suspension bridge is not only suitable for a superposed beam scheme (namely a scheme of arranging a simply supported track beam on the bridge), but also suitable for a pure track beam scheme or a bridge scheme of paving a track plate on the bridge.
(2) The invention has small structure size and can realize larger longitudinal displacement expansion and contraction amount in a shorter structure length range.
(3) The invention has the advantages of clear structure stress and good durability.
(4) The invention can ensure that the longitudinal gaps between any two long stator track unit module systems are equal under any telescopic state through the synergistic action of the connecting rod system and the spring system.
It will be appreciated that the embodiments of the system described above are merely illustrative, in that elements illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over different network elements. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
In addition, it should be understood by those skilled in the art that in the specification of the embodiments of the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the embodiments of the invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects.
However, the disclosed method should not be interpreted as reflecting an intention that: that is, the claimed embodiments of the invention require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of an embodiment of this invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. High-speed maglev bridge large displacement telescoping device, its characterized in that: the magnetic suspension bridge is arranged in a groove on the upper edge of the beam end at two sides of a beam seam of the high-speed magnetic suspension bridge;
a longitudinal beam system is longitudinally arranged on the beam joint in a spanning manner, and the support at least comprises a fixed spherical support (20) at one end and a longitudinal movable support at the other end;
the longitudinal beam system is provided with a plurality of long stator track unit module systems at intervals along the longitudinal direction in a sliding manner through a plurality of fastener systems;
the single long stator track unit module system comprises a beam unit and a long stator track assembly;
the long stator track assembly comprises a whole body consisting of pi-shaped steel (10), a stator core (11) and a long stator coil (13), the whole body is fixed on the bottom surfaces of the two extending ends of the beam unit, the long stator track assembly further comprises a sliding top plate (1) and a magnetic guide plate (6), the sliding top plate (1) is fixed on the top surfaces of the two extending ends of the beam unit, and the magnetic guide plate (6) is fixed on the side surfaces of the two extending ends of the beam unit; the stator iron core (11) is fixed at the lower part of the pi-shaped steel (10), the long stator coil (13) is embedded in a groove of the stator iron core (11), and the long stator coil (13) longitudinally and continuously spans gaps among the long stator track unit module systems;
a telescopic connecting rod system is arranged between two adjacent beam units to link the extension of each seam;
a longitudinally continuous spring system is arranged between two adjacent cross beam units to assist in equally dividing the expansion amount;
and a longitudinal limiting system is arranged between two adjacent beam units to carry out telescopic extreme value limiting protection on each gap.
2. The large displacement telescopic device of the high-speed magnetic suspension bridge, according to claim 1, is characterized in that:
the longitudinal beam system comprises a longitudinal beam (17), a fixed spherical support (20), a first displacement amount longitudinal movable support and a second displacement amount longitudinal movable support;
the longitudinal movable support at the other end is a second displacement longitudinal movable support, a plurality of first displacement longitudinal movable supports are arranged between the fixed spherical support (20), and the displacement of the first displacement longitudinal movable supports is smaller than that of the second displacement longitudinal movable supports.
3. The large displacement telescopic device of the high-speed magnetic suspension bridge, according to claim 1, is characterized in that:
the beam unit of the long stator track unit module system comprises a beam top plate (2), a beam bottom plate (3) and a beam web plate (4);
the two ends of the beam top plate (2) are fixedly connected with the sliding top plate (1), the outer side end of the sliding top plate (1) is perpendicular to the sliding top plate (1) and is fixedly connected with the magnetic guide plate (6), the beam web plate (4) transversely extends to the inner side of the magnetic guide plate (6) and is fixedly connected with the magnetic guide plate (6), and the two ends of the beam bottom plate (3) are fixedly connected with the pi-shaped steel (10).
4. The large displacement telescopic device of the high-speed magnetic suspension bridge, according to claim 3, is characterized in that:
the spring system comprises a longitudinal connecting spring (16), a spring end connection;
the two ends of the longitudinal connecting spring (16) are fixedly connected to the beam webs (4) on the two sides, and the longitudinal connecting spring (16) is also arranged between the beam web (4) at the two longitudinal ends and spring end connecting pieces arranged on the fixed side beam part structure (23) and the movable side beam part structure (24) respectively to form a longitudinally continuous spring system.
5. The large displacement telescopic device of the high-speed magnetic suspension bridge, according to claim 3, is characterized in that:
the longitudinal limiting system comprises a longitudinal limiter (19) and a longitudinal limiter end fixing piece;
the longitudinal limiter (19) is fixed at the lower part of the beam bottom plate (3), the longitudinal limiter (19) is of a plate structure and comprises a T-shaped plate and a concave clamping plate which are mutually nested front and back, and the longitudinal movable distance of the T-shaped plate in the concave clamping plate is the maximum distance of the two adjacent long stator track unit module systems;
the longitudinal limiting device (19) is fixedly connected with the end fixing parts of the longitudinal limiting device arranged on the fixed side bridge beam part structure (23) and the movable side bridge beam part structure (24) at the two longitudinal ends respectively.
6. The large displacement telescopic device of the high-speed magnetic suspension bridge, according to claim 3, is characterized in that:
the connecting rod system comprises a connecting rod (14), a connecting rod central rotating shaft (15), a connecting rod transverse movable hinge (25) and a connecting rod end rotating shaft (33);
the cross beam web plate (4) is provided with an opening, a connecting rod center rotating shaft (15) is fixed along the vertical center line of the opening, the connecting rod center rotating shaft (15) penetrates through a circular hole in the center of an X-shaped connecting rod (14), the connecting rod (14) can freely rotate around the connecting rod center rotating shaft (15), and the end parts of the connecting rods (14) connected to adjacent long stator track unit module systems are connected through a connecting rod end rotating shaft (33) and can rotate around the connecting rod end rotating shaft (33);
at the two longitudinal ends, the ends of the connecting rods (14) are connected with connecting rod transverse movable hinges (25) arranged on the fixed side bridge beam part structure (23) and the movable side bridge beam part structure (24) through connecting rod end rotating shafts (33), and the connecting rods (14) at the connecting rod transverse movable hinges (25) can rotate around the connecting rod end rotating shafts (33) and can horizontally move along the transverse direction.
7. The large displacement telescopic device of the high-speed magnetic suspension bridge, according to claim 3, is characterized in that:
the single fastener system comprises a fastener (18), a fastener fixing piece, a fastener heightening base plate (31) and a damping base plate (32);
the upper portion of the fastener (18) is an upper cover plate, buckling plates are arranged on the lower portions of two sides of the upper cover plate, the upper cover plate and the buckling plates are fixed to the lower portion of the beam bottom plate (3), the upper cover plate and the buckling plates of the fastener (18) form a clamping and clasping type structure, the structure clamps and clasps a top plate of a longitudinal beam (17) of the longitudinal beam system downwards, and therefore the long stator track unit module system can move on the longitudinal beam (17) along the longitudinal direction.
8. The large displacement telescopic device of the high-speed magnetic suspension bridge, according to claim 7, is characterized in that:
and a fastener heightening base plate (31) is arranged between the fastener (18) and the beam bottom plate (3) and is used for adjusting the elevation of the track structure during installation or operation.
9. The large displacement telescopic device of the high-speed magnetic suspension bridge, according to claim 1, is characterized in that:
the longitudinal length L of the single long stator track unit module system is integral multiple of the basic length module of the stator iron core (11).
10. The large displacement telescopic device of the high-speed magnetic suspension bridge, according to claim 1, is characterized in that:
the total length of the high-speed magnetic suspension bridge large-displacement expansion device is K, the sum of the accumulated distance between the adjacent long stator track unit module systems and the distances between the long stator track unit module systems and the fixed side bridge beam structure (23) and the movable side bridge beam structure (24) is the total gap width D, wherein D is less than or equal to 10% of K.
11. The large displacement telescopic device of the high-speed magnetic suspension bridge, according to claim 7, is characterized in that:
and a vibration reduction base plate (32) is arranged between the fastener (18) and a top plate of a longitudinal beam (17) of the longitudinal beam system and is used for adjusting the supporting rigidity of the long stator track unit module system so as to reduce vibration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011427015.8A CN112482210B (en) | 2020-12-09 | 2020-12-09 | Large displacement telescopic device for high-speed magnetic suspension bridge |
| PCT/CN2021/111031 WO2022121340A1 (en) | 2020-12-09 | 2021-08-05 | High-speed maglev bridge large-displacement extension and retraction device |
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| CN202011427015.8A CN112482210B (en) | 2020-12-09 | 2020-12-09 | Large displacement telescopic device for high-speed magnetic suspension bridge |
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| CN112482210B (en) * | 2020-12-09 | 2021-12-31 | 中铁磁浮交通投资建设有限公司 | Large displacement telescopic device for high-speed magnetic suspension bridge |
| CN112731898B (en) * | 2021-03-30 | 2021-06-04 | 西南交通大学 | Indoor full-size test bed for evaluating active suspension control performance of bogie |
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| CN112482210A (en) | 2021-03-12 |
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