Hydraulic control system of bidirectional antistall lifting winch

Abstract

The invention discloses a hydraulic control system of a bidirectional antistall lifting winch. The system primarily comprises a hydraulic pump, an overflow valve at a pump outlet, a one-way valve at the pump outlet, a first proportional direction valve, an oil supplementing reducing valve, a first balancing valve, a first anti-reverse towing constant tension control module, a first oil supplementing one-way valve, a first safety valve, a PLC, a first pressure sensor, a torque rotational speed meter, a winch motor, a winch coiling block and the like. The invention relates to the hydraulic control system of the lifting winch, wherein a load port is independent and the system has antistall and constant tension functions. By adopting the two proportional direction valves, the load port is independent. By adopting a technical solution of arranging pressure lead-out point between the balancing valve and the proportional direction valves, measurement on the rotating speed of the winch coilingblock and antistall control algorithm is achieved by matching with the PLC; the constant tension control module, the pressure sensor and the torque rotational speed meter are adopted; by adopting themanual overflow valves in parallel, a manual constant tension control function can be achieved; the manual overflow valves can be set for many times for trial.

Description

technical field [0001] The invention relates to the field of hydraulic control, in particular to a two-way anti-stall hoisting winch hydraulic control system. Background technique [0002] The hydraulic control system is widely used in engineering machinery, building construction, logistics transportation, marine aviation and other fields due to its large power-to-weight ratio, easy stepless speed regulation, and precise and controllable motion. One of the typical equipment. [0003] Hydraulic hoisting winches generally have working characteristics such as large loads, high movement speeds, and overrunning loads. In practical applications, problems such as slow start, large parking impact, and stalling and backtracking under overrunning loads often occur. In some special applications (such as storage of marine precision instruments, hoisting and transportation of heavy objects, etc.), the hydraulic lifting winch is often required to have a constant tension control function,...

AI Technical Summary

Problems solved by technology

This kind of constant tension control loop is prone to stalling and dragging when the tension setting is too small.

The winch control system using proportional directional valve or proportional multi-way valve also has problems such as slow start and large stop shock

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