Redundant hydraulic control circuit for emergency braking of large winch

Abstract

The invention discloses a large winch emergency braking redundancy hydraulic control loop. A D single damper brake set hydraulic control loop, an F single damper brake set hydraulic control loop, a Gsingle damper brake set hydraulic control loop, an H single damper brake set hydraulic control loop and a damper brake set redundancy hydraulic control loop are included. According to the large winchemergency braking redundancy hydraulic control loop, damper brake pressure adjusting valves are reasonably allocated to reduce the control containing cavity volume, the single damper brake pressure adjusting valves are used for controlling the single set damper brake pressure, the dynamic response characteristic of the pressure is improved, and the control accuracy and the stability are improved;and solenoid directional valves are adopted for communicating all sets of damper brakes, and the system safety redundancy is improved. The large winch emergency braking redundancy hydraulic control loop has the beneficial effects of being high in pressure control accuracy, good in response characteristic and system stability, capable of achieving safe redundancy and the like.

Description

technical field [0001] The invention belongs to the technical field of lifting equipment, and in particular relates to a redundant hydraulic control circuit for emergency braking of a large winch. Background technique [0002] Large-scale winches are widely used in oil drilling, road construction, lifting and mine lifting, etc., and are responsible for important tasks such as lifting and lowering personnel and materials. The emergency braking system of large winches is directly related to production efficiency, production safety and personnel safety. The hydraulic braking system has the advantages of good safety performance, adjustable braking torque, high sensitivity, and compact structure, and is widely used in the winch emergency braking system. At present, hydraulic braking systems mostly use proportional relief valves or proportional flow valves to control the braking pressure of the brake brakes, and use one or two electro-hydraulic valves (proportional relief valves ...

AI Technical Summary

Problems solved by technology

At present, hydraulic braking systems mostly use proportional relief valves or proportional flow valves to control the braking pressure of the brake brakes, and use one or two electro-hydraulic valves (proportional relief valves or proportional flow valves) to centrally control multiple brake brakes. On the one hand, this structure reduces the reliability of the system, on the other hand, it increases the volume of the control cavity between the electro-hydraulic valve (proportional relief valve or proportional flow valve) and the brake, and then affects Dynamic response to brake pressure

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