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Closed energy-saving shield screw conveyor hydraulic system

A screw conveyor and hydraulic system technology, applied in mechanical equipment, fluid pressure actuating devices, mining equipment, etc., can solve problems such as low energy utilization rate, small reversing impact, and small speed regulation range, so as to improve energy utilization The effect of high efficiency, small commutation impact, and avoiding valve control loss

Inactive Publication Date: 2014-11-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of low energy utilization rate, small speed regulation range and large volume of the existing shield screw conveyor hydraulic system, the purpose of the present invention is to provide a closed energy-saving shield screw conveyor hydraulic system, which adopts variable The pump-controlled variable motor closed hydraulic system realizes high energy efficiency and wide-range speed regulation, and has the advantages of simple pipeline, small installation space and small commutation impact

Method used

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] Such as figure 1 As shown, the present invention includes: a motor 1, a variable variable pump 2, a fuel tank 3, an oil replenishment constant pressure pump 4, an A side oil replenishment check valve 5, a B side oil replenishment check valve 6, an oil replenishment safety valve 7, A Side system check valve 8, B side system check valve 9, system safety valve 10, discharge outlet control hydraulic system branch, A side hydraulic control check valve 11, B side hydraulic control check valve 12, A side execution Check valve 13, executive check valve 14 on side B, executive safety valve 15, conveyor variable motor 16; electric motor 1, variable pump 2, and charge oil constant pressure pump 4 are cascaded, 2A oil port of variable pump 2, side A The oil outlet of the replenishment check valve 5, the oil inlet of the A-side system check valve 8, the oil ...

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Abstract

The invention discloses a closed energy-saving shield screw conveyor hydraulic system, which comprises a motor, a variable displacement pump, an oil tank, an oil replenishing constant pressure pump, two oil replenishing one-way valves, an oil replenishing safety valve, two system one-way valves, a system one-way valve, two hydraulic control one-way valves, two execution one-way valves, an execution safety valve, a conveyor variable displacement motor, a proportional reversing valve, a rodless chamber side hydraulic control one-way valve, a rod chamber side hydraulic side hydraulic control one-way valve and a dumping port hydraulic cylinder. In the shield thrust process, the rotating speed and the torque of a screw conveyor are adjusted by adjusting the displacement of the variable displacement pump and the variable displacement motor, so that the valve control loss of the proportional reversing valve is avoided, and the high energy efficiency is realized; the system adopts a closed loop, and has the advantages of simple pipeline, small installation space and small reversing shock; and the oil replenishing pump adopts a constant pressure pump, so that the energy utilization rate is further improved.

Description

technical field [0001] The invention relates to a shield screw conveyor hydraulic system, in particular to a closed energy-saving shield screw conveyor hydraulic system based on volumetric speed regulation. Background technique [0002] The hydraulic system of the shield screw conveyor is one of the key subsystems of the shield tunneling equipment. It transports the soil cut by the cutter head out of the shield tunnel during the shield tunneling process, and maintains the amount of soil in the capsule and The dynamic balance of soil displacement keeps the pressure of the airtight chamber at a stable level. The stable pressure of the airtight chamber can be balanced with the water and soil pressure of the excavation surface to ensure the stability of the excavation surface, thereby reducing the settlement of the ground surface. The traditional hydraulic system is generally supplied by the variable pump, the proportional directional valve controls the quantitative motor, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/093F15B11/17
Inventor 龚国芳杨旭王林涛杨华勇侯典清廖湘平
Owner ZHEJIANG UNIV
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