Screw conveyor driven two-speed motor system and control method thereof

Abstract

The invention discloses a screw conveyor driven two-speed motor system and a control method thereof. The screw conveyor driven two-speed motor system comprises a high-pressure oil source, a hydraulicoil drain system, a hydraulic oil return system and a single oil return box oil drain system; an oil outlet of the high-pressure oil source is connected with oil inlets of a positive and negative rotation loop, a high-speed low-torque speed regulation loop and a two-stage pressure regulation loop through pipelines; an oil outlet of the positive and negative rotation loop is connected with oil inlets of an oil return back pressure loop and a hydraulic motor through pipelines; an oil outlet of the high-speed low-torque speed regulation loop is connected with an X opening of the hydraulic motor through a pipeline; the two-stage pressure regulation loop, the high-speed low-torque speed regulation loop and the oil return back pressure loop are connected with the hydraulic oil drain system through pipelines; the hydraulic motor is connected with the hydraulic oil return system through a pipeline; and a Y opening of the hydraulic motor is connected with the single oil return box oil drain system through a pipeline. The screw conveyor driven two-speed motor system and the control method have the beneficial effects of improving the working efficiency of a shield tunneling machine and reducing more time cost.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to a screw machine driving two-speed motor system and a control method thereof. Background technique [0002] The screw machine is an important part of the shield machine. Its function is to transport the soil to the outside when the shield machine cutterhead is excavating. According to different working conditions, the screw machine motor on the shield machine sometimes needs low-speed and high-torque output. , Sometimes high-speed and low-torque output is required, but the ordinary shield machine screw machine motor hydraulic system cannot fully meet the requirements, especially the high-speed and low-torque requirements. [0003] Traditional single-displacement motors are generally selected according to the maximum torque output. When the displacement of the power pump is determined and the power and speed of the motor are determined, when the hydraulic motor of the shiel...

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Problems solved by technology

[0004] In view of the above problems, the present invention proposes a screw machine driving two-speed motor system and its control method, which mainly solves the problem of slow excavation caused by the use of a single displacement hydraulic motor system for the shield machine screw machine

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