A screw lifting method and device with full closed loop servo control

The screw lifting method with full closed-loop servo control solves the problems of lifting accuracy and synchronous control in the treatment of ballastless track settlement, achieving precise adjustment and improved safety, and is suitable for railway settlement treatment construction.

CN122190084APending Publication Date: 2026-06-12CHINA RAILWAY DESIGN GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA RAILWAY DESIGN GRP CO LTD
Filing Date
2026-02-07
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing technologies for ballastless track settlement remediation suffer from insufficient lifting height and multi-node synchronous control precision, making it difficult to balance track lifting operations and long-term settlement monitoring. Safety redundancy protection measures are inadequate, and the control system structure is complex and not conducive to rapid construction and maintenance.

⚗Method used

The screw lifting method adopts full closed-loop servo control. Through parameter setting and calibration, the zero position is marked, the torsion angle correction and target lifting amount are calculated, and closed-loop control is carried out in combination with displacement and stress given curves. Precise adjustment is achieved by using servo motor and ball screw drive, and settlement monitoring is carried out during non-operation periods.

🎯Benefits of technology

It achieves precise control of lifting height, ensures track smoothness and overall lifting quality, improves operational efficiency and safety, can quickly lock the position in abnormal situations, and realizes settlement monitoring and condition assessment throughout the entire life cycle.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a screw lifting method and device of full closed loop servo control, and the method comprises the following steps: obtaining the settlement of each node based on zero position; calculating the correction amount of the torsion angle of each screw; calculating the target lifting amount of each node to generate the corresponding displacement given curve or stress given curve; performing synchronous lifting and monitoring real-time displacement; judging whether an unexpected situation occurs and locking the lifting at any time; controlling the servo motor of each node in a closed loop based on real-time displacement and real-time stress; filling the joint after the lifting is completed; storing the new elevation; the device comprises a base bed surface layer, a lifting installation position is arranged in the base bed surface layer, a lifting execution mechanism is arranged in the lifting installation position, a lifting end of the lifting execution mechanism is connected with a passive lifting unit, and a filling joint is filled between the passive lifting unit and the base bed surface layer. The application realizes high-precision lifting of a track structure and cooperatively controls the stress and displacement in a closed loop.
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