Constant-tension winch hydraulic system

Abstract

The invention discloses a constant-tension winch hydraulic system. An oil outlet of the power pump set is communicated with an oil inlet of the pressure reducing valve, an oil outlet of the pressure reducing valve is communicated with a first oil port of the main control valve, a second oil port of the main control valve is communicated with a forward oil inlet of the hydraulic motor through a forward oil way, and a forward oil outlet of the hydraulic motor is communicated with a third oil port of the main control valve through a reverse oil way. A fourth oil port of the main control valve is communicated with the oil tank, an oil inlet of the main overflow valve is located on one side of the oil outlet side of the first one-way passage and communicated with the forward rotation oil way, and an oil outlet of the main overflow valve is communicated with the reverse rotation oil way through a second oil way. The oil inlet of theoverflow valve is regulated to be connected with one end of a reversing valve. The other end of the reversing valve is communicated with an oil outlet of the first overflow valve and an oil outlet of the second overflow valve, an oil inlet of the first overflow valve is communicated with a control port of the pressure reducing valve, and an oil inlet of the second overflow valve is communicated with a control port of the main overflow valve. The set value of the second overflow valve is a fixed pressure value higher than the set value of the first overflow valve, so that overflow loss can be reduced.

Description

technical field [0001] The invention relates to the technical field of hydraulic systems, in particular to a constant tension winch hydraulic system. Background technique [0002] As one of the most common ship deck supporting equipment, the hydraulic winch can be used as a hoisting winch to cooperate with the A-frame to complete the deployment and recovery of underwater operation equipment. It can also be used as a mooring winch to fix the ship near the dock. It can also be used as a The towing winch completes the towing of the tugboat to the barge, etc. Marine hydraulic winches generally need to have the constant tension control function of the cable. For example, the hoisting winch is easily affected by wind and waves during operation, and the cable will be loose and over-tensioned. Therefore, the constant tension function is needed to improve the stability and stability of the hoisting process. Safety; the mooring winch needs a constant tension function to control the t...

AI Technical Summary

Problems solved by technology

The continuous opening of the relief valve will generate a lot of heat, which will not only cause energy loss in the system, but also cause the temperature rise of the hydraulic system to reduce the viscosity of the hydraulic oil, reduce the efficiency, and reduce the life of the pipe joints and valves, etc.

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