Key Technologies and Application of Electro-hydraulic Sleeper Internal Locking Turnout Switch Machine

Abstract

Objective Current commonly used EhsD (electro-hydraulic sleeper external locking turnout switch device) exhibits problems such as complex mechanical structure, high civil engineering requirements, numerous faults, and substantial maintenance workload. To address these issues, the design of a practical, simple, stable, and reliable EhsD is proposed. ［Method］ Starting from the EhsD overall structure, its key technologies including sleeper installation, dust and water-proof technology, optimized cable path layout, action and indication mechanisms, comprehensive insulation of mechanical components, and anti-loosening technology for bolts are expounded. Trial installation and testing are conducted on the new device at No. 1 turnout of Oriental Sports Center Station on Shanghai Rail Transit Line 8. Result & Conclusion The trial installation and testing results indicate that the device meets relevant technical standards, with the turnout switch machine achieving a dust and water proof rating of IP68. According to the test results, after installing the trial electro-hydraulic sleeper internal locking turnout switching equipment, the hydraulic monitoring action pressure curve is smooth, with resistance during the locking phase significantly reduced, switching time shortened, and no loosening of bolts and fasteners is observed. The operation of new EhsD is stable and reliable, leading to a substantial reduction in operation-maintenance costs.

Keywords

• urban rail transit
• internal locking
• turnout switching equipment
• electro-hydraulic switch machine
• sleeper installation