Deep-sea winch wave compensation hydraulic driving system with load adaptability

Abstract

The invention discloses a deep-sea winch wave compensation hydraulic driving system with load adaptability. The deep-sea winch wave compensation hydraulic driving system with the load adaptability comprises a main lifting loop, a brake loop and a constant tension control loop. A three-position four-way solenoid valve is adopted in the main lifting loop to select a work overflow valve, switchover of system backpressure values under different working conditions is achieved, and system power consumption is lowered effectively. An overflow valve is adopted to control the backpressure of the constant tension control loop, the inlet of a fourth overflow valve is connected with a pilot operated check valve, the pilot operated check valve is controlled through a two-position three-way solenoid valve, effective separation of the constant tension control loop and the main lifting loop when the constant tension control loop does not work can be achieved, and meanwhile, the rapidity for the constant tension control loop to be put into work is guaranteed. The driving mode of a variable displacement motor and a variable pump set is adopted, the output torque of a variable hydraulic motor is changed by changing the travel of the variable displacement mechanism of the variable hydraulic motor, namely, by changing the displacement of the variable hydraulic motor, the output power of the variable pump set is changed correspondingly according to the hydraulic power needs of the variable hydraulic motor, and the stepless regulation of the output capacity of the hydraulic winch is achieved.

Description

technical field [0001] The invention relates to a hydraulic drive system of a deep water winch, in particular to a wave compensation hydraulic drive system of a deep water winch with load adaptability. Background technique [0002] With the development of my country's marine engineering industry, the development of marine resources has moved from shallow seas to deep seas, even ultra-deep seas, and the difficulty of deep sea construction has also increased. During deep-sea construction, ships or offshore platforms will sway and heave irregularly with wind, waves and ocean currents, so that the load of the deep-water winch is always in a changing state during lowering and installation operations. In addition, when the deep-water winch is lowered for installation, as the depth of the load changes, the buoyancy of the load will change, and the weight of the cable for hoisting the load will also change. Then, if the output capacity of the winch remains unchanged, the tension in ...

AI Technical Summary

Problems solved by technology

For the solution of hydraulic cylinder plus accumulator, the pressure of the accumulator has a certain corresponding relationship with the set value of constant tension. To change the set value of constant tension, the gas pressure of the accumulator must be changed. In actual engineering The gas pressure in the accumulator is generally set in advance, and it is difficult to quickly adjust it online

For the scheme of hydraulic motor plus relief valve, hydraulic motor plus common relief valve is more widely used. The opening pressure of the relief valve can only be manually adjusted by the staff, and it is difficult to quickly adjust online; Chinese patent CN102153027A published A hydraulic winch stepless adjustment constant tension device, which uses a pilot-controlled proportional relief valve to adjust the pressure on the side of the rope, so as to achieve the purpose of quickly adjusting the constant tension setting value online, but when the load is small, the proportional relief valve overflows The flow is large, which can easily cause the system to heat up and cause power waste

Images