High-efficiency and energy-saving TBM (tunnel boring machine) horizontal posture adjustment hydraulic system

Abstract

The invention discloses a high-efficiency and energy-saving TBM (tunnel boring machine) horizontal posture adjustment hydraulic system. The system comprises an oil source system I, a tight propping system II, a propelling system III and an oil tank, wherein the oil source system I is connected with the oil tank through a hydraulic pump oil suction pipeline and an overflow valve oil drain pipeline;the tight propping system II and the propelling system III are connected with the oil source system I through a high-pressure pipeline and connected with the oil tank through an oil return pipeline;and the tight propping system II and the propelling system III are not connected. According to the system, while high-accuracy propelling and horizontal posture adjustment of a TBM are guaranteed, rapid return of a propelling hydraulic cylinder and rapid output and rapid return of a tight propping hydraulic cylinder are realized; and an energy accumulator is adopted to maintain pressure of high-pressure tight propping condition of the propping hydraulic cylinder, and by means of a check valve, the tight propping hydraulic cylinder keeps pressure needed by tight propping all the time in the high-accuracy posture adjustment condition process and energy is saved as well. While forming quality of a tunnel is guaranteed, construction progress is accelerated, and energy is saved,

Description

technical field [0001] The invention relates to a hydraulic system for adjusting the horizontal posture of a TBM, in particular to a high-efficiency and energy-saving TBM supporting hydraulic system. [0002] technical background [0003] The goal of the TBM attitude adjustment system is to make the TBM excavate along the tunnel design axis, and the accuracy of the attitude control of the TBM fuselage is directly related to the quality of the excavated tunnel. In the process of tunnel excavation by TBM, while satisfying the quality of excavation, high efficiency and energy saving are also the indicators of TBM excavation. [0004] The actuators of the TBM horizontal attitude adjustment hydraulic system are composed of four propulsion hydraulic cylinders and a pair of horizontal tension hydraulic cylinders arranged symmetrically, which are responsible for the high pressure propulsion of the propulsion hydraulic cylinders, low pressure fast return and low pressure fast forward ...

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Problems solved by technology

[0005] In order to overcome the excessive overflow loss of the existing high-precision TBM horizontal attitude adjustment hydraulic system under high pressure and small flow conditions, and the low hydraulic cylinder speed under low pressure and large flow conditions, the purpose of the present invention is to provide a high-efficiency and energy-saving TBM horizontal attitude Adjust the hydraulic system, and use a high-pressure small-flow quantitative hydraulic pump and a proportional pressure reducing valve (or a proportional speed regulating valve plus a proportional overflow valve) to achieve high-precision pressure and flow control during the high-pressure propulsion process of the propulsion hydraulic cylinder; In the fast return process, a low-pressure large-flow quantitative hydraulic pump and a throttle valve are used to realize the high-speed return of the propulsion hydraulic cylinder; The dynamic connection realizes the high-speed movement of the tensioning hydraulic cylinder; during the high-pressure tensioning process of the tensioning hydraulic cylinder, a high-pressure small-flow quantitative hydraulic pump and a throttle valve are used to realize the high-pressure tensioning of the tensioning hydraulic cylinder, and an accumulator is used to maintain pressure ; In the process of adjusting the attitude of the horizontal floating adjustment of the hydraulic cylinder, the high-pressure small-flow quantitative hydraulic pump and the proportional reversing valve are used to achieve high-precision position control; the electromagnetic overflow valve is used to realize the unloading of each hydraulic pump in the process of TBM suspending excavation. charge

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