An electro-hydraulic proportional multi-hydraulic winch control system and its control strategy

Abstract

The invention discloses an electro-hydraulic proportional multi-hydraulic winch control system and a control strategy thereof. The system comprises three hydraulic winches, a load sensing pump (1), acontrol pump (2), an electric proportional overflow valve (3) and a system operational module. The three hydraulic winches are each provided with an electro-hydraulic proportional integrated controller. Each electro-hydraulic proportional integrated controller comprises two-way cartridge valves V1, V2, V3 and V4, an operational amplification module MK, a two-way working hydraulic motor MT, two-position four-way electromagnetic directional valves V5, V8, V11 and V14, three-position four-way electromagnetic proportional directional valves V6, V9, V10 and V13, an overflow valve V7, an overflow valve V12, a hydraulic pump pux and a hydraulic pump puy. The control strategy comprises three working conditions including rising, median stop and falling of the hydraulic winches. According to the electro-hydraulic proportional multi-hydraulic winch control system and the control strategy thereof, central pumping station multi-winch hydraulic control energy consumption is further reduced, and multi-winch high-precision collaborative operation is further achieved.

Description

technical field [0001] The invention relates to a control system, more specifically to an electro-hydraulic proportional multi-hydraulic drawworks control system and its control strategy, belonging to the technical field of hydraulic control valves. Background technique [0002] Due to its large power-to-mass ratio and strong load overload capacity, hydraulic winches are favored by users; therefore, hydraulic winches are widely used in marine engineering, ships, coal mines, wharfs, mines, roads and bridges and other fields. [0003] At present, in order to save energy, the hydraulic system of the existing hydraulic winch usually adopts a centralized pumping station type (also called one-to-many) load sensing system. However, in actual use, especially in the load-sensing system of the centralized pumping station type multi-hydraulic winch, there are the following problems: 1. In the multi-hydraulic winch system, when it is in the lowering working condition, due to the system ...

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Problems solved by technology

However, in actual use, especially in the load-sensing system of the centralized pumping station type multi-hydraulic winch, there are the following problems: 1. In the multi-hydraulic winch system, when it is in the lowering working condition, due to the system setting There is a balance valve to increase the overall pressure of the system; in the case of lowering the working condition, the actual demand only needs to ensure that the motor does not suck air, which results in useless consumption of part of the energy

2. In the multi-hydraulic winch system, the hydraulic winch is usually controlled by a multi-way valve, and the multi-way valve usually controls the winch one-to-one, that is, one multi-way valve controls one winch, and the multi-way valve is usually controlled by manual Control, or hydraulic or electric control handle control, so precise coordination between multiple winches is very difficult

3. In the load-sensitive system of the existing centralized pump station type multi-hydraulic winch, due to the large number of pipelines such as multi-way valves and balance valves, in actual construction, the piping system of the hydraulic system is complicated, the space requirement is large, and the construction is difficult and high cost

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