TBM dual-mode switching pushing hydraulic system

Abstract

The invention discloses a TBM dual-mode switching pushing hydraulic system. The system comprises an oil source, two pushing modules and a two-position four-way solenoid directional valve, wherein the two pushing models are identical in structure, and the two-position four-way solenoid directional valve achieves mode switching. The mode that four pushing cylinders are controlled together in dual modes is adopted, so that control is easy under the working condition of linear tunnel excavation, and the problem of complexity of grouping control for a long time is solved, output forces of the four oil cylinders are equal, it is strictly guaranteed that the joint force is in the direction of a main beam, and errors, caused by independent control, of deviation from preset trails are eliminated. The left and right module grouping control mode in the dual modes is adopted for substantially reducing internal force at the tunnel turning positions of a TBM and in the process of direction adjusting, the joint force is in the direction of the main beam, and the problems that components and hydraulic elements of the TBM are damaged due to unbalanced pushing force of the oil cylinders, and a tunnel deviates from a preset curve are solved.

Description

technical field [0001] The invention relates to a TBM propulsion hydraulic system, in particular to a dual-mode switching TBM propulsion hydraulic system which realizes common control and group control of four hydraulic cylinders. Background technique [0002] Hard rock tunnel boring machine (Tunnel Boring Machine, referred to as TBM). TBM adopts mechanical rock breaking, and the cutter head is pressed against the rock through the propulsion system. The cutter head is driven by a frequency conversion motor or hydraulic motor to rotate, and the rock is crushed under the extrusion of the cutter on the cutter head, so that the tunnel is formed at one time. TBM is a large-scale machine that integrates tunnel construction excavation, muck removal, ventilation and dust removal, tunnel track laying, and wind, water and electricity extension. It has construction characteristics of fast, high quality, safety, and environmental protection. equipment. [0003] Open TBMs are widely us...

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Problems solved by technology

[0005] In order to overcome the existing TBM construction process, especially during the excavation of curved tunnels, the tunnel deviates from the predetermined curve, and the mechanical components of the TBM are easily damaged, and the hydraulic components in the propulsion system are easily damaged. At the same time, four hydraulic cylinders are connected in parallel, and the control Simple, and the advantages of higher precision in the straight line tunnel excavation process, the purpose of the present invention is to provide a dual-mode switching TBM propulsion hydraulic system

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