A Hydraulic Cylinder Type Passive Heave Compensation System Based on Hydraulic Transformer

Abstract

The invention discloses a hydraulic cylinder type passive heave compensation system based on a hydraulic transformer. The hydraulic cylinder type passive heave compensation system based on the hydraulic transformer comprises a winch, a pulley, a compensating cylinder, a safety control valve with a rod cavity, a safety control valve without a rod cavity, a hydraulic motor safety valve, a fuel tank,the hydraulic transformer, an energy accumulator, an energy accumulator safety valve, an overflow valve, an oil outlet oil filter, an oil supplementary pump, a motor, an oil supplementary one-way valve, a pressure sensor without a rod cavity, an energy accumulator pressure sensor, a primary motor swash plate tilt sensor, a secondary motor swash plate tilt sensor, a mother ship acceleration sensorand a controller. The hydraulic transformer is installed between the compensating cylinder and the energy accumulator. According to the hydraulic cylinder type passive heave compensation system basedon the hydraulic transformer, the heave compensation is achieved by controlling the tilt angles of variable motors of the hydraulic transformer so as to keep the pressure of the compensating cylinderwithout a rod cavity constant. Compared with a traditional passive heave compensation system, the hydraulic cylinder type passive heave compensation system based on the hydraulic transformer has theadvantages of high compensation accuracy, low installed power, good adaptability and high reliability, and is applicable to working conditions of large depth, large load and changing sea conditions.

Description

technical field [0001] The invention relates to the marine technical field of an underwater towing system, in particular to a hydraulic cylinder type passive heave compensation system based on a hydraulic transformer. Background technique [0002] Disturbed by waves, ocean currents, and sea winds, surface ships will move in six degrees of freedom in the ocean. Among them, the movement in the vertical direction, that is, the heave movement, makes the depth of the towed body and the tension of the towed cable of the underwater towed system drastically change. If the heave motion of the towing body is not compensated, the working efficiency of the towing body will be reduced, and even the towing cable will be broken or the equipment will be damaged, resulting in serious economic losses and safety accidents. Therefore, it is necessary to adopt heave compensation technology to ensure the safe and reliable operation of the underwater towing system. [0003] The heave compensatio...

AI Technical Summary

Problems solved by technology

However, when the actual system performs heave compensation, the volume change of the rodless cavity causes the pressure to change, resulting in poor ability of the system to reduce load heave motion and low compensation accuracy

CN105275414A proposes a method for increasing the gas volume of the accumulator to reduce the method for compensating the pressure change in the rodless cavity of the oil cylinder, but this method increases the volume of the entire system at the same time, and the deck area of ​​the mother ship where the system is installed is limited

In addition, when the sea state changes, the passive heave compensation system cannot achieve the optimal compensation performance

Therefore, the current passive heave compensation system has the problems of low compensation accuracy and poor adaptability

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