Pressure flow rate composite synchronization control energy-saving type shield propelling system

Abstract

The invention discloses a pressure flow rate composite synchronization control energy-saving type shield propelling system, which comprises an oil source system, wherein the oil source system is formed by connecting a motor with a constant rate pump through a shaft coupler, the oil source simultaneously supplies oil to a pipe sheet split part, the propelling system adopts zone control and is divided into four zones, a control part and a pressure synchronization and flow rate synchronization switching unit are arranged in each zone, the control part consists of a proportional flow rate valve and a proportional overflowing valve, and the pressure synchronization and flow rate synchronization switching unit consists of a flow division valve, a two-position three-way valve and grouped hydraulic cylinders. A main path of the invention adopts an open type control system controlled by a constant rate pump valve, can realize the propelling mode selection in the propelling process, and can realize the composite control on the pressure synchronization and the flow rate synchronization, at the same time, the pipe sheet split system and the propelling system share one set of oil source, and the installation power can be reduced. On one hand, because of the arrangement of an energy accumulator, the vibration and the impact can be absorbed, and on the other hand, the energy accumulator can also be used as an auxiliary energy source when the propelling cylinder retreats back or meets impact load. Thereby, the installation power of the system is further reduced.

Description

technical field [0001] The invention relates to a fluid pressure actuator, in particular to an energy-saving shield tunneling propulsion system adopting compound synchronous control of pressure and flow. Background technique [0002] The shield boring machine is a technology-intensive major engineering equipment dedicated to the excavation of underground tunnels. It has the advantages of fast excavation speed, high quality, low labor intensity, high safety, and small impact on surface settlement and environment. With the development of science and technology and social progress, shield tunneling will gradually replace traditional methods. [0003] The propulsion system together with the cutter head system, screw conveyor and segment assembly system constitute a complete shield machine shield system. The propulsion system is one of the key systems of the shield machine. It is mainly responsible for the jacking task of the entire shield machine, and it is required to complet...

AI Technical Summary

Problems solved by technology

In the traditional shield tunneling machine, the segment assembly part and the propulsion part are separately supplied with oil, which inevitably increases the installed power of the system, and the system is cumbersome; the hydraulic cylinders in the area are directly connected in parallel. When the propulsion load changes, the propulsion direction changes, and the synchronous The performance is poor, which increases the pressure of the deviation correction system to a certain extent

In order to improve work efficiency, the traditional propulsion process is divided into propulsion and fast retreat parts. By using the high and low pressure pump interconnection to supply oil to the propulsion and fast retreat respectively, the cost and power loss of the system will be increased. At the same time, the segment assembly part has a part The potential energy is not fully utilized, so it will increase the installed power and energy loss of the system. Therefore, how to realize the energy-saving control of the hydraulic system and the synchronization of propulsion while ensuring that the shield tunneling system completes the tunneling task correctly and efficiently is a key issue in shield tunneling. a key technical issue

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