Epicyclic Gear Torque Reduction Using Ring Gear Linkage Arms
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Solution Overview
Problem
Conventional single main rotor helicopters and other machines with epicyclic gearing systems face significant challenges in managing high torque forces, which require robust and heavy components to withstand the stress, leading to potential catastrophic failures and safety issues, especially in cases of mechanical failures.
Innovation Solution
A torque reduction system utilizing a planetary gear set with a sun gear, planetary gears, a ring gear, and linkage arms connected to a housing, where the ring gear is restrained from motion and bearings are used to reduce the transmission of rotational forces, allowing for the design of components to handle higher stresses without excessive torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If components are designed to withstand high torque forces, then reliability is improved, but weight increases
Solution Approach 1:
The patent extracts the torque counteraction function from the main engine components and relocates it to the tail rotor system. By taking out the torque management function from the primary power transmission path, the main engine and transmission components can be designed without excessive strength requirements, reducing their weight while maintaining reliability through the dedicated torque reduction mechanism at the tail rotor.
Solution Approach 2:
The patent introduces an intermediary torque reduction mechanism in the tail rotor drive system that acts as a mediator between the engine power and the tail rotor. This intermediary system handles the torque counteraction function, allowing the main engine components to operate without direct exposure to full torque forces, thus reducing their weight requirements while maintaining system reliability.
2Reliability
If elaborate systems are incorporated to reduce torque, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the torque reduction mechanism with the existing tail rotor drive system rather than adding a separate elaborate system. By combining the torque management function with the tail rotor transmission path, the invention achieves reliable torque counteraction without increasing overall device complexity, as the mechanism utilizes existing system components and pathways.
Solution Approach 2:
The tail rotor system serves dual purposes: it performs its primary function of anti-torque control while simultaneously acting as the torque reduction mechanism. The system is self-sufficient, using its own drive path and components to manage torque forces, eliminating the need for separate elaborate torque reduction systems and thereby maintaining simplicity while improving reliability.
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
This solution effectively reduces the rotational forces applied to critical engine components, enhancing safety by allowing for lighter and less strenuous design, improving flight safety in helicopters and enabling the potential reduction of the tail rotor size and relocation, while maintaining control during autorotation.
Implementation Method 1
an epicyclic gearing is able to convert this power into rotation of the rotors
Implementation Method 2
Epicyclic gearing torque reduction mechanism
Implementation Method 3
at least one set of bearings, wherein the bearings are in contact with the ring gear and a housing element
Data Source
AI summary
A torque reduction system for an epicyclic gearing system, comprising: a power source; a sun gear connected to the power source; planetary gears in communication with the sun gear; a ring gear in communication with the planetary gears; and at least one linkage arm connected to the ring gear and a housing.