Movable type active heave compensator and working method thereof

Abstract

The invention relates to a movable type active heave compensator and a working method thereof, which are mainly applied to the marine operation fields of ship supply, deep sea fishing, seabed installation and the like. The movable type active heave compensator mainly comprises an equidifferent hydraulic cylinder, a bidirectional quantitative pump, a servo motor, a controller and a power source, wherein the controller is connected with the servo motor to receive an outside signal and control the starting, stopping and rotation speed of the servo motor; the servo motor is connected with the bidirectional quantitative pump to control the pumping of the bidirectional quantitative pump; the equidifferent hydraulic cylinder comprises two containing cavities, one containing cavity is connected with a piston rod, and both ends of the bidirectional quantitative pump are connected with the two containing cavities through oil lines; the power source is used for supplying power for the device. Themovable type active heave compensator has the advantages that the movable type active heave compensator can be installed between a steel wire rope and a load rope of a crane to automatically and quickly compensate for the heave movement of the load in the ascending and descending process, the safety in lifting operation is improved, the compensation precision is high, the response speed is quick,the structure is simple, the cost is low, the energy consumption is low, the flexibility and convenience in use are realized, and the movable type active heave compensator can be instantly installedonce being installed.

Description

technical field [0001] The present invention relates to a mobile active heave compensator and its working method, in particular to a mobile active heave compensator applied in the field of marine work such as ship replenishment, deep sea salvage, seabed installation, etc., belonging to marine engineering equipment technology field. Background technique [0002] With the continuous improvement of my country's marine development technology, there are more and more types and quantities of offshore operations in my country. However, due to the impact of various harsh environments such as wind, waves, currents, and tides on offshore operations, the Pitch, roll, yaw, surge, sway, heave and their coupled motions will inevitably occur, among which the heave direction motion has the most significant impact on marine safety operations. Therefore, heave compensators are needed to compensate the heave direction of marine engineering equipment, which are mainly used in deep sea mining op...

AI Technical Summary

Problems solved by technology

In this invention, two parallel pulley blocks are installed at one end of the piston rod protruding part, and the passive compensation method is adopted. The rod chamber of the passive compensation cylinder is connected with the rodless chamber of the compensation cylinder through the oil pipe, and the rodless chamber of the passive compensation cylinder is connected with the gas cylinder. The bottle is connected to the air pressurization system to compensate most of the heave displacement; the active compensation method is adopted, and a tension sensor is placed at the position where the cable passes, and the analog signal of the cable tension change is transmitted to the controller. By controlling the electro-hydraulic ratio The spool of the reversing valve controls the movement of the piston rod of the active compensation cylinder, but there are still throttling losses and energy losses, and the structure is complex and costly

[0008] To sum up, the passive compensator has low compensation accuracy, unstable compensation performance, and relatively large lag; the active compensator still has high energy consumption, which is only suitable for low-power occasions, and the scope of use is small; the semi-active heave is still not mature enough , and the structure is complex and the cost is high

[0009] At present, most of the existing offshore engineering equipment has a certain compensation ability. If the current fixed compensation device scheme is redesigned to improve the compensation ability, it will face problems such as high cost and long cycle time.

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