Energy-saving type shield hydraulic pressure control system using hydraulic pressure transformer

Abstract

The invention discloses an energy-saving shield machine hydraulic pressure control system, adopting hydraulic transformer, which comprises a hydraulic transformer, a motor, a constant pressure variable displacement pump, a two-position three-way reversing valve, a proportional overflow valve, a safety valve, an accumulator, a hydraulic cylinder, a three-position four-way reversing valve, a hydraulic motor, a reducing valve and a two-position two-way reversing valve; wherein, the shield machine driving, the cutter head drive and the spiral transportation system are integrated in a loop; the constant pressure network comprising the constant pressure variable displacement pump and the accumulator provides the system with power energy; the propulsion system adopts group control and comprises a plurality of groups; the discharge capacity of variable displacement pump/motor inside the hydraulic transformer is adjusted in real-time to control the speed and the propulsive force of the propulsion hydraulic cylinder and the rotational speed and the output torque of the hydraulic motor. The energy-saving shield machine hydraulic pressure control system has the advantages of adopting hydraulic transformer and other energy-saving elements and control methods, lossless transfer of energy, guarding against energy loss in the throttling speed regulation system, and good performance of energy-saving.

Description

technical field [0001] The invention relates to a fluid pressure actuator, in particular to a shield energy-saving hydraulic system using a hydraulic transformer. Background technique [0002] Shield boring machine is a modern high-tech tunneling equipment specially used for underground tunnel construction. Compared with traditional construction methods, the shield method has many advantages such as safe and fast construction, high engineering quality, less ground disturbance, and low labor intensity. Due to the adoption of advanced excavation face stabilization technology, shield excavation has shown unique advantages especially in the construction of tunnel projects with complex and changeable geological conditions and harsh construction environments. In addition, shield tunneling also plays an irreplaceable role in satisfying complex route excavation. With the development of science and technology and social progress, shield tunneling will gradually replace traditional ...

AI Technical Summary

Problems solved by technology

Most of the traditional shield tunneling machines adopt the valve control method, especially in the propulsion hydraulic system, group valve control will cause a lot of energy loss, and ultimately reduce the overall efficiency of the system

The low efficiency of the system not only wastes energy and affects the life of the equipment, but also deteriorates the construction environment and brings many unfavorable factors

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