9-DOF Wave Compensation Platform With Deadweight Counterbalance
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Solution Overview
Problem
Existing offshore platform boarding bridges with wave compensation functions suffer from equipment deadweight loads that increase energy consumption and risk damage due to complex ship movements during offshore wind turbine installation, necessitating improved motion compensation.
Innovation Solution
A 9-DOF wave compensation platform combining a 6-DOF parallel stabilization platform and a 3-DOF tandem boarding bridge, utilizing motion branch chains, balancing cylinders, and active control to counterbalance equipment deadweight and stabilize ship motion across various frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wave compensation control mechanism is added to the boarding bridge, then wave compensation function is improved, but equipment deadweight increases causing higher load on driving components
Solution Approach 1:
The patent introduces a counterweight mechanism that uses a balance beam and counterweight block to offset the equipment deadweight on the boarding bridge. The counterweight block is connected through a cable and pulley system to create an opposing force that balances the weight of the compensation mechanism components, thereby reducing the net load on driving components while maintaining the wave compensation function
2Stability of the object's composition
If complex motion compensation is implemented, then ship motion stability is improved, but energy consumption increases
Solution Approach 1:
The counterweight mechanism reduces energy consumption by passively balancing the equipment deadweight through gravitational force. The balance beam and counterweight block system automatically compensates for weight variations during motion, eliminating the need for continuous active energy input to maintain stability, thus reducing overall energy consumption while improving motion stability
3Device complexity
If equipment deadweight is not counterbalanced, then device complexity is reduced, but driving components are at risk of damage due to excessive load
Solution Approach 1:
The counterweight mechanism provides a simple yet effective solution to protect driving components from excessive load. By using a balance beam, counterweight block, and cable-pulley system, the patent creates a passive mechanical structure that automatically offsets the equipment deadweight, thereby reducing the load on driving components and preventing damage without significantly increasing device complexity
Solution Approach 2:
The patent introduces intermediary elements (balance beam, counterweight block, cable, and pulley) that mediate between the equipment deadweight and the driving components. These intermediaries transfer and balance the forces, protecting the driving components from direct exposure to excessive loads while maintaining system functionality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces driving load and energy consumption while achieving stable contact and full compensation of ship motion, ensuring safe and efficient offshore operations.
Implementation Method 1
a gas bladder in the accumulator expands outward under air pressure, pressing hydraulic oil in the accumulator toward the oil cylinder through the oil delivery pipe, so that the oil cylinder lifts the piston rod to counterbalance the equipment deadweight
Implementation Method 2
an oil cylinder and an accumulator; and the piston rod is fixedly mounted on the slider, and an oil delivery pipe of the accumulator is connected to the oil cylinder
Data Source
AI summary
The present application provides a 9-DOF wave compensation platform and operation method in marine engineering technology, comprising a 6-DOF parallel stabilization platform and a 3-DOF tandem boarding bridge. The 6-DOF parallel stabilization platform comprises a mounting base and a movable platform. Motion branch chains are arranged between the mounting base and the movable platform. The motion branch chain moves actively driven by a driving element, and a balancing cylinder system is further connected to the motion branch chain to offset the deadweight of the equipment. The 3-DOF tandem boarding bridge is installed on the movable platform. Through the balancing cylinder system, the driving load generated by component weight in the 9-DOF wave compensation platform is counterbalanced in advance, so that the driving load of the compensation platform during operation is significantly reduced, with lower total energy consumption of the system, and wider range of selectable driving elements.