Defects and Rectification of the Electrical and Industrial Interface of the No.9 Turnout with Short Sleeper in Urban Rail Transit
In order to solve the common problems of the industrial and electrical interface of the No.9 short sleeper turnout in urban rail transit,research was conducted on the structure and size that affect the industrial and electrical interface.Firstly,a theoretical analysis model was established using FORTRAN programming language,and the parameters that affected the transition and deformation of the pointed rail were analyzed.Secondly,on-site research and summary were conducted on typical industrial and electrical interface diseases of turnouts,and corresponding measures and suggestions were provided.Research shows that:(1)as the range of the second traction point decreases,both the pulling force and the minimum wheel flange groove significantly decrease.As the active section of the pointed rail increases,the pulling force significantly decreases.As the close-fitting length of the pointed rail decreases,the maximum horizontal displacement of the pointed rail at the second traction point increases.Encrypting the irons of the pointed rail is effective in reducing the horizontal displacement of the pointed rail.(2)The defects of industrial and electrical interface for the switch,such as the size of the switch frame and the straightness of the basic rail and switch rail close fitting section exceeding the tolerance,the gap between the switch rail bottom and the sliding bed,and the deviation of the short sleeper,can be solved by improving the accuracy of switch laying.(3)Reducing the range of the second traction point of the pointed rail from the original design 84 mm to 75 mm,and the pulling force of the pointed rail from 5 173 N to 3 429 N are suggested.Adding irons at the center of the short sleeper after the second traction of the pointed rail to reduce the deformation of the pointed rail under load is suggested.It is recommended to use truss type turnout sleepers in the design of turnout structures to improve the accuracy of turnout laying.
urban rail transitturnoutsshort sleeperindustrial and electrical interface
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