Hydraulic propulsion system of shield tunneling machine and shield tunneling machine

CN224550467UActive Publication Date: 2026-07-24CHINA RAILWAY CONSTR HEAVY IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA RAILWAY CONSTR HEAVY IND
Filing Date
2025-06-24
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing shield machine hydraulic control systems are complex in structure, costly, and have a high failure rate. Especially in large-diameter slurry balance shield machines, traditional hydraulic propulsion systems require multiple proportional speed control valves and hydraulic pump sets, which increases design difficulty and reduces aesthetic coordination.

Method used

The design employs an active control oil circuit and a follower control oil circuit. The active control oil circuit controls the first oil cylinder through a proportional speed control valve and a proportional pressure reducing valve, while the follower control oil circuit adjusts the propulsion speed and pressure of the second oil cylinder through a pilot pressure reducing valve to keep it consistent with the first oil cylinder, thereby reducing the number of proportional speed control valves and proportional pressure reducing valves used.

Benefits of technology

The hydraulic control system structure has been simplified, reducing costs and failure rates, improving the coordination and adaptability of the propulsion cylinders, and meeting different propulsion needs while reducing reliance on proportional speed control valves and proportional pressure reducing valves.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of shield machine hydraulic propulsion system and shield machine, wherein, the shield machine hydraulic propulsion system includes for being connected with the initiative control oil circuit of first oil cylinder and for being connected with the following control oil circuit of second oil cylinder;Initiative control oil circuit includes for being set between the first propulsion oil circuit of hydraulic pump and the rodless chamber of first oil cylinder, first propulsion oil circuit includes proportioning speed regulating valve, proportioning pressure reducing valve and first ball valve arranged in sequence;Following control oil circuit includes for being set between the second propulsion oil circuit of hydraulic pump and the rodless chamber of second oil cylinder, second propulsion oil circuit includes second ball valve and pilot pressure reducing valve arranged in sequence, the control end of pilot pressure reducing valve is connected with the output end of proportioning pressure reducing valve, to make the propulsion pressure and propulsion speed of second propulsion oil circuit all keep consistent relative to first propulsion oil route.The shield machine hydraulic propulsion system provided by the utility model can reduce the use quantity of proportioning speed regulating valve and proportioning pressure reducing valve, simple structure and low in cost.
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Citation Information

Patent Citations

  • Heading machine propulsion control system and heading machine

    CN114857491A