负载图改进

Utilizing a Cranemaster® shock absorber enables rig cranes to maintain high lifting capacity despite increasing wave heights. Up to 95% of the dynamic forces will be absorbed by the shock absorber, protecting both crane and load and giving a smooth operator experience. We can recalculate your load chart taking the dynamic load reduction into account. The new and improved load chart can further be verified by 3rd party.

Operational Challenges

  • Reduced lifting capacity at increasing wave heights.

  • Potential damage to rig crane and load due to dynamic forces at high sea states.

Cranemaster Benefits

  • Increased weather window for your lifting operations.

  • Lifting capacity maintained despite increasing wave heights.

  • Increased rig utilization through improved operability.

  • Protection of crane, rigging and load at lift-off.

  • Easy mounting and handling.

  • Smooth and efficient crane operator experience.

Cranemaster will help you reduce the dynamic load at lift-off, and thus improve your weather window

Ready for lift-off.

The Cranemaster® unit with shackles in both ends can be hung in the existing crane hook.

Impacts from load absorbed before transferred to the crane.

Protection of both crane and load.

Significant improvements in lift-off situations with Cranemaster®

The dynamic amplification factor (DAF) resulting from wave induced movements may be very high even for small wave heights. A Cranemaster® shock absorber mounted between the hook and the load will reduce the dynamic load at lift-off, and thus the DAF. The DAF is typically reduced to 1.3 or below for sea states up to Hs = 2.0-2.5 m.

We can recalculate your load chart taking the dynamic load reduction into account, and will thus increase the acceptable load as function of sea states. The new and improved load chart can further be verified by 3rd party. In order to do the recalculation, we need to have specific information about your crane.

The simulation shows a Cranemaster® shock absorber in operation during a lift-off from a supply vessel. Mounted between the hook and the load, the unit will reduce the dynamic load in the crane, and thus the DAF.

crane tension lift-off supply vessel rig shock absorber cranemaster DAF

The graph shows the reduction in dynamic load at lift-off with and without the use of Cranemaster®. The reduction in maximum dynamic load (and DAF) enables the improvement in load chart capacity.

Increased crane capability at high sea states

Utilizing Cranemaster®, an offshore crane may typically be able to maintain close to full onboard capacity up to a wave height (Hs) of around 2.0 – 2.5 meters.

Cranemaster® has controlled dampening and spring functionality, providing a fine tuned spring-damper system. This system will efficiently absorb energy created due to the relative motion between crane and load in a lifting operation. Since the energy is absorbed by the Cranemaster® unit, both crane and load will be protected. This makes it possible to conduct the operation in challenging sea states while limiting dynamic load acting on crane and load.

Load chart improvement using cranemaster

Example for a specific radius as function of the significant wave height.
= Original crane capacity = With Cranemaster.

Cranemaster® shock absorber in action during lift-off from supply vessel.

Featured References – 负载图改进

2018-10-10T08:26:00+01:00

Greater Gabbard 的过渡件安装

客户挑战: 从浮船上安装 过渡件 会有很大挑战性。  在英国海岸的 Greater Gabbard 海上风电场项目中,Jumbo Offshore 在安装过渡件时使用了 Cranemaster®。 Cranemaster 解决方案: 我们为此项目设计了两个新 Cranemaster® 装置,SWL 为 400公吨,伸缩量为 2.5 米。 为了限制在船甲板上方的提升高度,还加入了“锁定和释放”功能。 详情: Cranemaster® 装置主要用于降低吊绳张紧力,以及确保过渡件安全地放置到海上的桩体上。

2018-10-10T08:28:28+01:00

STL 浮标系统定制减震器

客户挑战: 将装载浮标提升到船舶停靠舱时,起重装置会因船舶运动产生峰值负载。 Cranemaster 解决方案: 为缓解和避免 过量负载,Cranemaster 设计了一个特殊装置,可作为过载保护装置永久性地安装在装载浮标的顶部。 负载超过预设压力时,Cranemaster® 减震器会随之伸缩。 这保证了装载浮标实现平稳且安全的停靠。 详情: 这些装置 现已经运行多年,执行了认证机构要求的检查和检修。 Cranemaster® 减震器 安装在 Vincent 和 Reliance 油田的 APL 装载浮标上。

More references

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