Composite control hydraulic system for position and speed in rotation movement of duct piece assembly

Abstract

The invention discloses a composite control hydraulic system for a position and a speed in the rotation movement of duct piece assembly. The composite control hydraulic system is a closed return circuit formed by a motor, a speed control variable pump, a position control variable pump, an oil supplementary constant displacement pump, two two-position two-way electromagnetic reversing valves, an oil tank, two oil supplementary one-way valves, an oil supplementary overflow valve, two system one-way valves, a system safety valve, two balance valves, two implementation one-way valves, an implementation safety valve and a constant displacement motor. According to the composite control hydraulic system, the switching of a position control mode and a speed control mode can be conveniently realized, in the speed control mode, the far distance and rapid transportation of duct pieces can be realized, in the position control mode, the precise positioning of duct pieces can be realized, by the adoption of a pump control mode in the composite control hydraulic system, the valve control loss is avoided, and the composite control hydraulic system has a remarkable energy-saving effect.

Description

technical field [0001] The invention relates to a segment assembling rotary motion hydraulic system, in particular to a segment assembling rotary motion position and speed composite control hydraulic system. Background technique [0002] The segment assembly machine is one of the key subsystems of the shield equipment system. It assembles the concrete segment into a tunnel lining after the shield advances one ring, which is used to stabilize the excavated tunnel and provide a support point for the shield advance , The quality of segment assembly is directly related to the quality of tunnel construction, and also affects the adjustment of the posture during the shield tunneling process. During the process of building the annular inner wall, the segment needs to be moved from the bottom to a specific position on the inner wall of the tunnel and needs to be fine-tuned several times during the assembly process. Therefore, the segment assembly machine can generally realize non-in...

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Problems solved by technology

[0003] The slewing mechanism mainly completes the positioning of the segment in the circumferential direction. The traditional hydraulic system is generally supplied by a variable pump, and the proportional directional valve controls the slewing motor. The slewing motor drives the slewing mechanism of the segment assembly machine through the reducer. The moment of inertia of the segment is large and the rotation angle is large. The traditional large-diameter valve can realize the rapid movement of the segment, but it is difficult to realize the precise positioning of the segment. The traditional small-diameter valve can realize the precise positioning movement of the segment, but it is difficult to achieve Rapid assembly of segments, and the valve control system has the characteristics of large energy loss

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