Thrust-load-simulation hydraulic system of tunnel boring machine

Abstract

The invention discloses a thrust-load-simulation hydraulic system of a tunnel boring machine. A rodless cavity of a thrust oil cylinder is communicated with an oil opening of a thrust oil path, a rod cavity of the thrust oil cylinder is communicated with another oil opening of the thrust oil path, and the thrust oil cylinder is connected with a piston rod of a thrust-load oil cylinder; an oil inlet of a reset one-way valve is communicated with a large cavity of the thrust-load oil cylinder and an oil tank; one path of an oil outlet of the reset one-way valve is communicated with the rod cavity of the thrust-load oil cylinder, and the other path of the oil outlet of the reset one-way valve is connected with the oil tank after passing through a slender hole electromagnetic proportional throttle valve, a thin cutting edge electromagnetic proportional throttle valve and an electromagnetic proportional overflow valve; an oil inlet and an oil outlet of an oil and liquid air-cooling valve group are communicated with the oil tank. According to the thrust-load-simulation hydraulic system of the tunnel boring machine disclosed by the invention, the electromagnetic proportional throttle valve and the electromagnetic proportional overflow valve with different opening forms are connected in series and are subjected to uniform parameter adjustment, so that the setting of the thrust-load, the setting of rock-soil static pressure and the advance speed are considered in an unified manner to realize high-fidelity simulation of the thrust-load of the tunnel boring machine. The thrust-load-simulation hydraulic system is also suitable for other dynamic simulation occasions of linear thrust-load.

Description

technical field [0001] The invention relates to a load simulation hydraulic system, in particular to a tunnel boring machine thrust load simulation hydraulic system. Background technique [0002] The tunnel boring machine is a new type of tunnel construction machine. It cuts the rock and soil through the cutter head driven by the electric motor or hydraulic motor, and pushes forward under the action of the propulsion system. The conveyor belt transports the cut rock and soil, and the supporting system The excavated tunnel is supported, so that the entire section of the tunnel can be excavated at one time. The tunnel boring machine construction method integrates electromechanical and hydraulic control, and has the characteristics of fast, high-quality, safe, and environmentally friendly construction. It is the best choice for tunnel construction. [0003] The tunnel boring machine has a huge structure, complex system, high cost, and poor adaptability to different geological ...

AI Technical Summary

Problems solved by technology

[0004] The tunnel construction environment restricts the accuracy of construction data collection, and the existing theoretical calculations cannot take into account the complex construction environment. Therefore, physical simulation tests are the main feasible solution

Some of the existing thrust load simulation schemes use buried soil boxes or placed rock blocks as load simulation. Although it has the advantage of being more accurate, it is not easy to replace buried soil and rock blocks, data acquisition is difficult, and the replacement cost is high; the hydraulic system has power density. Large, and has a mature linear load element hydraulic cylinder and supporting sensors, so the use of hydraulic systems for thrust load simulation has advantages that other solutions cannot replace

[0005] Existing hydraulic thrust load simulation system, such as patent CN201010613390.1, the velocity load and pressure load are in parallel relationship, and can only simulate the idealized thrust load separately; patent CN201110395900.7 can only realize the simulation of pressure load, and cannot Simulate dynamic loads during tunneling

Therefore, there is currently no hydraulic system suitable for tunnel boring machine thrust load simulation

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