Hydraulic system of horizontal screw-discharging filter centrifuge and control method of hydraulic system

Abstract

The invention relates to a hydraulic system of a horizontal screw-discharging filter centrifuge. The hydraulic system comprises a drum hydraulic system and a screw hydraulic system, wherein the drum hydraulic system comprises a drum pump and a drum motor which constitute a closed loop; the screw hydraulic system comprises a load-sensitive pump, a load-sensitive control valve and a screw motor which constitute an open load-sensitive system, and both the drum pump and the load-sensitive pump are driven by the motor. The drum can be driven and controlled by the closed system, rotation speed of the drum can be accurately controlled by controlling displacement of the drum pump, a screw conveyor can be driven and controlled by the open load-sensitive system, and rotation speed of the screw conveyor can be accurately controlled, so that differential of the drum and the screw conveyor can be accurately controlled, and small differential is realized. Besides, the load-sensitive system provides flows according to needs, so that the system is very energy saving.

Description

technical field [0001] The patent of the present invention relates to a hydraulic system and control method of a horizontal spiral unloading filter centrifuge, in particular to a fully hydraulically driven horizontal screw unloading filter centrifuge hydraulic system and its control method, which belongs to the solid-liquid separation equipment technology field. Background technique [0002] Horizontal screw discharge filter centrifuge (hereinafter referred to as horizontal screw filter centrifuge) is a solid-liquid separation equipment with low energy consumption, stable performance and good separation effect. In the separation process, the processes of feeding, dehydration, washing, and unloading are completed continuously, and it is a model with high production efficiency. Its working principle is that the screw conveyor is set in the drum, and the drum and the screw rotate at a high speed in the same direction at a certain differential speed. After the material enters, ...

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Problems solved by technology

It has multiple control functions, high integration, and small size for automatic control; it solves the problem of large differential speed between the drum and the screw pusher in the decanter filter centrifuge, small output torque, and hydraulic joints that are prone to hydraulic oil penetration and differential speed. Technical problems such as precise control and non-energy saving

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