阅读说明：本技术 大刚度高速磁浮道岔支撑点布置结构及布置方法 (Large-rigidity high-speed magnetic suspension turnout supporting point arrangement structure and arrangement method ) 是由 李利军 牛均宽 余锋 吉敏廷 张宁 于 2020-04-25 设计创作，主要内容包括：本发明涉及一种既解决了道岔梁刚度低、易共振等相关问题,又能满足时速600Km高速磁浮系统的大刚度高速磁浮道岔支撑点布置结构及布置方法,由直线、缓和曲线、圆曲线、缓和曲线和直线构成不间断高速磁浮道岔,且直线、缓和曲线、圆曲线、缓和曲线和直线之间的连接点为线形转换点,该线形转换点即为驱动台车支撑点。优点：发明提出了大刚度高速磁浮道岔支撑点布置,并通过有限元法对道岔竖向刚度和横向刚度进行计算分析和优化,满足大刚度的使用要求。该布置方法大幅度提高了道岔梁刚度,并且将提高了道岔转辙后线形的精度,改善了道岔因刚度低而引起共振的问题。(The invention relates to a high-rigidity high-speed magnetic suspension turnout supporting point arrangement structure and an arrangement method which not only solve the problems of low rigidity, easy resonance and the like of a turnout beam, but also meet the requirement of a high-speed magnetic suspension system with the speed per hour of 600 Km. The advantages are that: the invention provides arrangement of high-rigidity high-speed magnetic suspension turnout supporting points, and the vertical rigidity and the transverse rigidity of the turnout are calculated, analyzed and optimized by a finite element method, so that the use requirement of high rigidity is met. The arrangement method greatly improves the rigidity of the turnout beam, improves the linear precision of the turnout after switching, and solves the problem of resonance of the turnout caused by low rigidity.)

1. The utility model provides a high-speed magnetic levitation switch strong point of big rigidity arranges which characterized by: the uninterrupted high-speed magnetic suspension turnout is formed by a straight line, a easement curve, a circular curve, a easement curve and a straight line, and the connecting point of the straight line, the easement curve, the circular curve, the easement curve and the straight line is a linear switching point which is a driving trolley supporting point.

2. The arrangement of the supporting points of the high-rigidity high-speed magnetic suspension turnout according to claim 1, which is characterized in that: the continuous connection point between the easement curve and the circular curve is a No. 2 driving trolley, the continuous connection point between the circular curve turnout and the easement curve turnout is a No. 6 driving trolley, and the continuous connection point between the easement curve turnout and the straight turnout is a No. 8 driving trolley.

3. The arrangement of the high-rigidity high-speed magnetic suspension turnout supporting points according to claim 2, which is characterized in that: one or more supporting trolleys are arranged between adjacent trolleys No. 2#, No. 6# and No. 8 composed of straight lines, easement curves, circular curves, easement curves and straight lines.

4. A high-rigidity high-speed magnetic levitation turnout supporting point arrangement as claimed in claim 3, wherein: the supporting trolley is connected with the turnout beam through the supporting seat, the web plate of the turnout beam is connected with the upper end of the supporting seat, the lower end of the supporting seat is connected with the supporting trolley frame, and the supporting trolley consists of the trolley frame, the walking wheels and the locking device.

5. The arrangement of the supporting points of the high-rigidity high-speed magnetic suspension turnout according to claim 1, which is characterized in that: the driving trolley is connected with the turnout beam through the supporting seat, the upper end of the supporting seat is connected with a web plate of the turnout beam, the lower end of the supporting seat is connected with the supporting trolley frame, and the driving trolley consists of the trolley frame, the walking wheels, the locking device and the driving device.

6. The arrangement of the supporting points of the high-rigidity high-speed magnetic suspension turnout according to claim 1, which is characterized in that: the EE type stator and the EA type stator are arranged in the turnout beam and are arranged on the F rail.

7. A method for arranging supporting points of a high-rigidity high-speed magnetic suspension turnout is characterized by comprising the following steps: the arrangement position of the key trolley is as follows: according to the linear requirements of a straight line, a transition curve, a circular curve and a transition curve, fitting the bending curve of a turnout steel beam by a plane combination consisting of 5 piecewise functions, wherein the turnout steel beam needs to reach a deformation curve consisting of three sections of curves of the transition curve, the circular curve and the transition curve under the drive of concentrated loads; four trolley supporting points are set, wherein 0#, 2#, 6#, and 8# trolleys are arranged on the linear conversion points to ensure that the linearity of the turnout beam meets the curve requirement after the four supporting points are in place; the supporting trolley is arranged: the stator needs to be considered to the position of arranging of support platform truck, the position of function piece, the mode that the stator arranged in the switch roof beam adopts the straight line to arrange under the circumstances of considering the side traffic, consider the crooked change volume between the function piece in the middle part of the switch roof beam, the roof beam is made, the concatenation precision, the manufacturing length influence of switch roof beam, the switch chooses stator iron for use to be EE type stator, two kinds of EA type stator, according to rigidity calculation result, combine the requirement of arranging of stator and function piece, can arrange the support platform truck of a certain amount between 0#, 2#, 6#, 8# adjacent platform truck and improve switch roof beam rigidity.

Technical Field

The invention relates to a high-rigidity high-speed magnetic suspension turnout supporting point arrangement structure and an arrangement method, which not only solve the problems of low rigidity, easy resonance and the like of a turnout beam, but also meet the requirement of a high-speed magnetic suspension system with the speed of 600Km per hour, and belongs to the technical field of urban rail transit.

Background

At present, the rigidity design value of the high-speed maglev turnout on the Shanghai line refers to the German high-speed maglev standard for value taking, the vertical rigidity design value is L/4800 and the transverse rigidity value is L/15000 under the action of train load, but the requirements of a high-speed maglev train with the speed of 600km per hour on the rigidity value and the transverse rigidity value cannot be met.

CN 101007538B, name "switching device of magnetic levitation train", which comprises: a beam which can be bent transversely to the direction of travel and is provided with a roadway element or a piece of equipment; a track arranged transversely to the direction of travel; a rack arranged transversely to the direction of travel and a carrier supporting the beam, which carrier is supported on the rail by means of a roller and has a drive mechanism, which comprises a gear wheel engaging in the rack and a motor for driving the gear wheel. According to the invention, the beam, the carrier and the drive form a combined part which is fixedly connected to one another and is arranged so as to be displaceable in the direction of travel as a whole relative to the rail and the toothed rack, wherein the rollers are displaceable on the rail and the toothed rack parallel to the direction of travel. This document describes and illustrates the structure of the switch device, but does not relate to the study of the influence of the arrangement of the trolley on the rigidity of the rigid beam, and does not relate to the arrangement and the arrangement method of the trolley.

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 literature introduces a driving scheme of a high-speed magnetic levitation line high-speed turnout in the world under the drive of a first auxiliary motor and the transmission of 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 existing trolley layout scheme is subjected to active fulcrum combination, characteristics of switching processes with different fulcrums as driving points are compared, and the influence of trolley layout on rigidity of a rigidity beam is not researched, and the trolley layout method are not involved.

Disclosure of Invention

The design purpose is as follows: the defects in the background technology are avoided, and the arrangement structure and the arrangement method of the high-rigidity high-speed magnetic suspension turnout supporting points are designed, so that the problems of low rigidity, easiness in resonance and the like of a turnout beam are solved, and the requirement of a high-speed magnetic suspension system with the speed of 600Km per hour can be met.

The design scheme is as follows: the invention takes a high-speed maglev train with the speed per hour of 600km as a design object, designs the rigidity of a turnout beam, and improves the rigidity of the turnout beam by two methods: firstly, the bending modulus of the section is increased; secondly, the arrangement of supporting points is designed. However, increasing section modulus stiffness increases the drive power of the switch beam. Therefore, under the action of a large load, the design requirement of turnout rigidity is improved by researching the linearity and driving of the turnout and arranging trolley supporting points.

By designing the arrangement of the high-rigidity high-speed magnetic suspension turnout supporting points, the problems of low rigidity, easy resonance and the like of a turnout beam are solved, and the design requirement of a high-speed magnetic suspension system with the speed of 600Km per hour is met.

The invention provides a theoretical method for arranging turnout trolleys by researching the alignment of turnouts, and provides a set of trolley arrangement schemes of 8-span high-rigidity high-speed magnetic suspension turnouts by calculating the rigidity of turnout beams under the action of vertical load and transverse load of a train and combining the arrangement principle of the turnout trolleys.

The invention is mainly technically characterized in that: comprehensively determining according to the line shape of the turnout, the stator arrangement and the beam rigidity, and arranging a key trolley at the position of a line shape conversion point to ensure the accuracy of the line shape; the stator discharge conforms to the law; and determining the supporting position of the non-key trolley by combining with rigidity calculation to form the arrangement of the large-rigidity high-speed magnetic suspension turnout supporting points.

(1) The arrangement position of the key trolley is as follows: as shown in fig. 1, according to the requirement of the line shape of the turnout, "straight line-easement curve-round curve-easement curve-straight line", the combination of planes consisting 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 consisting of the above three sections of curves (easement curve-round curve-easement curve) under the drive of concentrated load.

According to material mechanics analysis, the shearing force on the cross section of the turnout beam between points 2# and 6# is zero, the bending moment is constant, the section is pure bending, the cross section only has positive stress but no shearing stress, and the bending curve is a pure circular curve.

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 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.

As shown in fig. 2, four supporting points (trolleys) are set up, wherein 0#, 2#, 6#, 8# trolleys are arranged on the linear conversion points to ensure that the linearity of the turnout beam meets the curve requirement after the four supporting points are in place.

(2) The supporting trolley is arranged: the arrangement position of the supporting trolley needs to consider the positions of the stator and the functional part, the stator in the turnout beam is arranged in a linear arrangement mode under the condition of considering the lateral line traffic, namely, the stator is arranged linearly along the axis of the web plate of the functional part, and the lower bottom surface of the stator on the same functional part is kept in the same plane. The function of the functional piece is to provide the installation base of the stator iron, the support of the vehicle skid surface and the side guiding capability, so the structural size of the part is designed according to the form and size of the vehicle and the stator; the material should be selected in consideration of the hysteresis performance of the material itself in addition to the mechanical performance.

The theoretical length of the functional part is integral multiple of the length of the stator iron in combination with the design condition of the previous step, and the gap between the stators of the adjacent functional parts meets the requirement of shortening of the bending state of the turnout, so that the theoretical length of the functional part at the middle arc part is one of the specifications of 2064mm and 1032 mm; the standard of 2064mm is adopted for uniform arrangement. The gap variation between the stators is small at the two ends of the turnout beam, and the turnout beam simultaneously contains the straight line segment of the turnout, so that the two ends are designed according to the length of a standard functional part of 3096 mm.

In conclusion, the straight line section of the turnout is designed according to the length of a standard functional part of 3096 mm; the circular curve section of the turnout is designed according to the length 2064mm of the functional part; the gentle curve section of the turnout is designed according to the length of the functional part of 1032 mm;

according to the rigidity calculation result, a certain number of supporting trolleys can be arranged among adjacent trolleys of 0#, 2#, 6#, and 8# to improve the rigidity of the turnout beam by combining the arrangement requirements of the stator and the functional part.

The technical scheme 1: the support point arrangement for high-speed magnetic suspension turnout with high rigidity is characterized by that it is formed from straight line, relaxation curve, circular curve, relaxation curve and straight line, and the connecting points between the straight line, relaxation curve, circular curve, relaxation curve and straight line are linear conversion points, and said linear conversion points are the support points of driving trolley.

The technical scheme 2 is as follows: a method for arranging supporting points of a high-rigidity high-speed magnetic suspension turnout comprises the following steps: according to the linear requirements of a straight line, a transition curve, a circular curve and a transition curve, fitting the bending curve of a turnout steel beam by a plane combination consisting of 5 piecewise functions, wherein the turnout steel beam needs to reach a deformation curve consisting of three sections of curves of the transition curve, the circular curve and the transition curve under the drive of concentrated loads; four trolley supporting points are set, wherein 0#, 2#, 6#, and 8# trolleys are arranged on the linear conversion points to ensure that the linearity of the turnout beam meets the curve requirement after the four supporting points are in place; the supporting trolley is arranged: the stator needs to be considered to the position of arranging of support platform truck, the position of function piece, the mode that the stator arranged in the switch roof beam adopts the straight line to arrange under the circumstances of considering the side traffic, consider the crooked change volume between the function piece in the middle part of the switch roof beam, the roof beam is made, the concatenation precision, the manufacturing length influence of switch roof beam, the switch chooses stator iron for use to be EE type stator, two kinds of EA type stator, according to rigidity calculation result, combine the requirement of arranging of stator and function piece, can arrange the support platform truck of a certain amount between 0#, 2#, 6#, 8# adjacent platform truck and improve switch roof beam rigidity.

Compared with the background technology, the invention provides the arrangement of the high-rigidity high-speed magnetic suspension turnout supporting points, the arrangement method greatly improves the rigidity and the natural vibration frequency of the turnout beam, improves the linear precision of the turnout after switching, and improves the resonance problem of the turnout caused by low rigidity. The concrete expression is as follows: firstly, the turnout design with large rigidity requirement on the turnout beam is met; secondly, the comfort and the safety of the train passing through the turnout are improved; thirdly, the rigidity of the turnout is greatly increased while the switching power of the turnout is not increased; fourthly, improving the natural vibration frequency of the turnout; fifthly, the line shape is more accurate after the turnout is switched in place; sixthly, the method has the characteristics of high design efficiency and strong flexibility; the invention can be expanded to be applied to the layout design of various large-rigidity 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 layout of high-speed magnetic suspension turnout switch driving trolley.

Detailed Description