Energy recovery device in shield duct piece assembling driving system

Abstract

The invention discloses an energy recovery device in a shield duct piece assembling driving system, comprising an electric motor, a pump, a one-way valve, a hydraulic motor / pump, a relief valve, an energy accumulator, a three position four-way directional control valve, a hydraulic pressure transformer and a hydraulic cylinder. The system adopts the motor / pump, the energy accumulator and the hydraulic pressure transformer as energy conversion and recovery elements, converts part of the mechanical energy in the circumferential rotation and vertical lifting movement shield duct piece assembling machine into hydraulic energy, and stores the hydraulic energy to be used for assembly. The actuator element motor / pump of the hydraulic system drives the assembling machine to rotate when working at the state of motor, and feeds the load energy back to the energy accumulator when working at the state of pump. By switching the working states of the hydraulic transformer, the lifting of a lifting hydraulic cylinder and the recovery of gravity loading energy are realized. As no throttling element is arranged in the system, the energy transmission efficiency is high, energy loss in a throttle governing system is avoided, and the system has obvious energy conservation effect.

Description

technical field [0001] The invention relates to a fluid pressure actuator, in particular to an energy recovery device in a shield segment assembly drive system. Background technique [0002] Segment assembly is a key step in tunneling and forming. As a major part of the shield tunneling machine, the segment assembly system undertakes the task of assembling the prefabricated segments along the tunnel excavated by the shield. During the segment assembly process, the assembly machine usually needs to have a sufficient number of degrees of freedom to reach any position in the annular tunnel for assembly operations. The freedom of position and attitude is achieved by the action of each actuator in the assembled drive hydraulic system. Among the many actions of segment assembly, the two actions of circumferential rotation and vertical lifting are completed in the vertical plane, so the system bears typical gravity loads. The segment assembly mechanism itself often weighs severa...

AI Technical Summary

Problems solved by technology

In the traditional segment assembly hydraulic system, the control of these two actions is realized by means of throttling elements. In the case of acting on gravity and acting on gravity, the system has throttling loss, and all the gravity load energy is wasted.

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