Novel heave compensation system and method for offshore crane

Abstract

The invention discloses a novel heave compensation system and method for an offshore crane. The novel heave compensation system comprises a lifting device, a heave compensation execution device, a controller and a ship heave motion simulation system, wherein the heave compensation execution device is hung on the lifting device, the ship heave motion simulation system is installed below the heave compensation execution device, and the lifting device, the heave compensation execution device and the ship heave motion simulation system are controlled by the controller to achieve matching between the heave compensation execution device and the ship heave motion simulation system. The novel active heave compensation device installed between a lifting hook and cargoes is convenient to disassemble or assemble, wide in application range and high in transferability.

Description

technical field [0001] The invention discloses a novel offshore crane heave compensation system and compensation method. Background technique [0002] The existing heave compensation device generally controls the up and down movement displacement of the load end of the wire rope by installing a hydraulic system and a pulley block on an ordinary crane. When the hull sinks, the piston rod drives the pulley block to extend out. The pulley block retracts to eliminate the heave effect of waves on the load. [0003] The heave compensation device is divided into active type and passive type according to the control force execution mode. The quilt heave compensation system relies on the rising and falling of the ship to compress and release the compressed air in the accumulator. The accumulator can be used as an air spring to absorb the impact force, thereby reducing the tension of the wire rope. The active heave compensation system usually uses MRU (motionreference unit) to measu...

AI Technical Summary

Problems solved by technology

[0004] Insufficient passive heave compensation system: Since the parameters cannot be selected and adjusted, the compensation performance of the system will be limited when the lifting cargo and working conditions change, and the compensation accuracy is low

In addition, the passive heave compensation system also has the disadvantage of relatively large lag, which is easy to cause accidents

[0005] Insufficient active heave compensation system: the active compensation system requires the system's own power energy to work

The traditional hydraulic system uses a hydraulic pump as power, which consumes a lot of power and is only suitable for small and medium power occasions

Compared with passive compensation of traditional hydraulic compensation system, the compensation accuracy and compensation elements are improved, but there is still a lot of room for improvement

In addition, due to the hydraulic system also has the disadvantages of large volume, heavy weight, troublesome replacement of hydraulic oil and maintenance

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