Volume 22 Issue 2
Apr.  2022
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WANG Pu, ZENG Rui-dong, WANG Shu-guo. Control method for insufficient displacement of switch rail in high-speed railway turnout[J]. Journal of Traffic and Transportation Engineering, 2022, 22(2): 87-98. doi: 10.19818/j.cnki.1671-1637.2022.02.006
Citation: WANG Pu, ZENG Rui-dong, WANG Shu-guo. Control method for insufficient displacement of switch rail in high-speed railway turnout[J]. Journal of Traffic and Transportation Engineering, 2022, 22(2): 87-98. doi: 10.19818/j.cnki.1671-1637.2022.02.006
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Control method for insufficient displacement of switch rail in high-speed railway turnout

doi: 10.19818/j.cnki.1671-1637.2022.02.006
  • 1.

    Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China

  • 2.

    Hangzhou Railway Design Institute Corporation Limited, Hangzhou 310000, Zhejiang, China

Funds:

National Natural Science Foundation of China 51878661

National Natural Science Foundation of China 51808557

More Information
  • Author Bio:

    WANG Pu(1988-), male, associate professor, PhD, wpwp2012@yeah.net

  • Received Date: 2021-10-20
  • Publish Date: 2022-04-25
    Abstract
  • To simulate the switching process of high-speed railway turnout switch under operating conditions, according to the switching characteristics of high-speed railway turnout switch, an experimental platform of the switching prototype of passenger dedicated railway No.18 turnout switch was established in a production workshop of turnout. The shaft pin type load cell was used to measure the switching force of the switch, and the difference between the actual and theoretical offset distances of straight and curved switch rails was taken as the insufficient displacement of switch rails. Switching experiments were carried out to explore the influence mechanism and characteristics of switch rail pre-bending, movable section length of switch rail, offset distance of fasteners at the fixed end of switch rail, friction coefficient of slide plate, and height of roller on the insufficient displacement of switch rail. Experimental results show that the designed switch rail pre-bending can reduce the insufficient displacement of switch rail by more than 30%, and the shortening of the movable section length of switch rail can reduce the insufficient displacement of switch rail, but decrease the minimum wheel flangeway width of the switch and increase the switching force at the third traction point. The minimum wheel flangeway width of swith rail and the switching force at the last traction point are the control factors for shortening the movable section length of switch rail. After the adjustment of the offset distances of all fasteners at the fixed end in a small range, the change of insufficient displacement of switch rail is small. When only reducing the offset distance of the first group of fasteners at the fixed end, the insufficient displacement of switch rail decreases slightly within the range of 1.2 m close to the fixed end, and the insufficient displacements at other sections change slightly. The measures of reducing the friction coefficient between the switch rail and the slide plate, such as the roller installation and lubricant coating on the slide plate, can effectively reduce the switching force and insufficient displacement of switch rail. After the implementation of these antifriction measures, the switching force decreases by about 30%, and the insufficient displacement decreases by more than 20%. The influence of changing the height of roller on the insufficient displacement of switch rail is not obvious, but the height of roller should not be too low, in order to avoid a surge in the switching force and insufficient displacement caused by the failure of roller in the switching process. The research results can provide important references for the structure optimization of high-speed railway turnout switch and the development of a new generation of 400 km·h-1 high-speed railway turnout. 7 tabs, 20 figs, 31 refs.

     

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    • References(31)
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