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Active heave compensation system and method

A heave-compensated, active technology used in shipping and packaging, ship auxiliary drives, equipment to reduce ship motion, etc., can solve problems such as leakage, expensive systems, and complexity

Active Publication Date: 2013-10-30
ITREC BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although hydraulic / pneumatic active heave compensation has been widely used in many configurations, its disadvantages are that the mechanism results in a complex system and involves the risk of hydraulic fluid leakage, resulting in a relatively complex and expensive system on the one hand. , while on the other hand requires regular and safe maintenance to avoid the risk of leakage and the resulting environmental pollution

Method used

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  • Active heave compensation system and method
  • Active heave compensation system and method
  • Active heave compensation system and method

Examples

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Embodiment Construction

[0055]figure 1 Shows a schematic height view of a partially submerged load L supported by a lifting device LI (such as a crane) located on a floating platform FP (such as a ship). The undulations will cause a vertical force, providing a periodic vertical movement of the load L and the floating platform FP. Consequently, a force will be periodically exerted on the cable CA of the lifting device LI. The purpose of the heave compensation is to compensate the cyclical movement of the heave motion, thereby avoiding possible damage to the load, overloading of the cables CA of the lifting device LI, etc. Although in figure 1 In , the example is shown where both the load and the platform supporting the lifting device LI are partially submerged, but it is also possible that one of the load and the lifting device is onshore or mounted to a solid reference, as an example, The lifting device may be mounted on the quay, or the lifting device may be mounted on the floating platform while ...

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Abstract

An active heave compensation system comprises a motor generator to interact with a load so as to drive the load in a first part of a heave motion cycle and to regenerate at least part of energy with which the load has been driven in a second part of the heave motion cycle, and an electrical storage element for storing the regenerated energy. The active heave compensation system further comprises a power supply electrically connected to the motor generator and the electrical storage element for providing electrical power to at least the motor generator, and a control unit configured to control the power supply substantially in synchronism with the heave motion.

Description

technical field [0001] The invention relates to an active heave compensation system, a ship comprising the active heave compensation system and an active heave compensation method. Background technique [0002] Heave compensation is a technique that has been known for many years. Many solutions have been provided, some of which are discussed below. In general, heave compensation provides compensation for heave motion on the load due to heave motion due to undulation. Loads can be submerged or partially submerged and thus subject to fluctuations. At the same time, or against it, it may be the case that the load is carried by a floating platform, such as a ship, which is subject to waves. Furthermore, there can be conceivably many other situations that could require a heave movement, such as the case where a load is removed from or placed on the floating platform, where the floating platform is subject to fluctuations. Heave compensation can be provided for any type of loa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B39/00B63B39/02
CPCB63B39/00B63B39/02B63B2039/105B63B2017/0072B63B27/30B63J3/04B60R16/033
Inventor J·勒登伯格C·J·艾克拉阿
Owner ITREC BV