Rack-and-pinion gear assembly for unidirectional wave energy conversion
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Solution Overview
Problem
Current ocean wave energy conversion technologies face efficiency and reliability challenges, particularly due to high-pressure hydraulic fluid issues in float systems, which can lead to reliability problems and early system shutdowns.
Innovation Solution
A device that harnesses mechanical vibration power by using a buoy connected to a rack and gear assembly, which drives a generator in a unidirectional rotation, converting both upward and downward movements into electrical energy, thereby addressing the inefficiencies and reliability concerns of existing methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a float system with hydraulic pumps is used to convert wave energy, then energy conversion efficiency is improved, but reliability deteriorates due to high-pressure hydraulic fluid leaks
Solution Approach 1:
The patent removes the hydraulic fluid system entirely from the wave energy conversion mechanism. Instead of using hydraulic pumps and high-pressure fluid transmission, the invention directly couples the buoy's vertical motion to a rack-and-pinion gear system that drives the generator mechanically, eliminating the source of leaks and reliability problems while maintaining efficient energy transfer
Solution Approach 2:
The patent replaces the hydraulic mechanical system with a direct mechanical transmission system. The buoy connects to a rack that engages with pinion gears, providing direct mechanical coupling between the oscillating motion source and the generator, thereby eliminating hydraulic fluid and associated reliability issues
2Device complexity
If a bi-directional airflow turbine is used for wave energy conversion, then system simplicity is improved, but energy conversion efficiency deteriorates
Solution Approach 1:
The patent employs asymmetric gear design where the pinion gears are positioned and configured to optimize unidirectional power transmission during both upward and downward buoy movements. The rack-and-pinion arrangement with strategic gear placement creates asymmetric mechanical advantage that maximizes energy capture while maintaining system simplicity
Solution Approach 2:
The patent uses dynamic gear engagement where the pinion gears are positioned to engage the rack at optimal points during the buoy's oscillation cycle. The system dynamically adapts the mechanical transmission ratio to maximize power generation during both upward and downward movements, improving efficiency without adding complex control systems
3Power
If a channel structure with hydro turbines is used, then energy concentration is improved, but device complexity and installation difficulty worsen
Solution Approach 1:
The patent extracts the energy concentration function from complex channel structures and implements it through a simple floating buoy design. The buoy naturally concentrates and captures wave energy through its floating position and oscillation, eliminating the need for elaborate channel structures and hydro turbine installations while maintaining effective power generation
Solution Approach 2:
The patent creates a multi-functional device where the buoy serves multiple purposes: it captures wave energy, converts it to mechanical motion through the rack-and-pinion system, and directly drives the generator. This universal design eliminates the need for separate channel structures and hydro turbines, reducing overall system complexity
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
The solution provides a reliable and efficient means of generating electrical energy from ocean waves by converting mechanical vibration into unidirectional rotation, enhancing the overall efficiency and longevity of wave energy harvesting systems.
Implementation Method 1
the generator engaged with the gear assembly for receiving the rotational movement output from the gear assembly and outputting a direct current according to the rotational input from the gear assembly
Data Source
AI summary
An energy generating device utilizing mechanical vibration power is provided. The energy generating device includes a first body for reciprocating according to vibration motions; an anchored second body; a rack coupled to one of the first body and the anchored second body; a gear assembly engaged with the rack and coupled to the other one of the first body and the anchored second body such that the gear assembly drives a generator via a rotational movement in a single direction according to each of upward and downward movement of the rack relative to the gear assembly; and the generator engaged with the gear assembly for receiving the rotational movement output from the gear assembly and outputting a direct current according to the rotational input from the gear assembly.