Hybrid Torque Transfer System for Rotorcraft
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing torque transfer systems in rotorcrafts often fail to provide constant velocity torque transfer when the yoke is tilted with respect to the shaft, and configurations using multiple universal joints complicate inspection and replacement of joint parts.
Innovation Solution
A hybrid dual-path torque transfer system utilizing a torque splitter to split torque into two portions, with a universal joint and a trunnion-driven path that cooperate as a constant velocity joint, allowing for easy inspection and replacement of drive links and bearings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single universal joint is used to transfer torque from the shaft to the rotating component, then the structure is simple, but constant velocity torque transfer cannot be achieved when the yoke is tilted with respect to the shaft
Solution Approach 1:
The torque transfer system is segmented into two separate rotational joints: a first universal joint and a second rotational joint with drive links. The torque splitter divides the torque from the shaft into two portions, each transferred through a different rotational joint type. This segmentation allows each joint to be optimized for its specific function while collectively achieving constant velocity torque transfer.
Solution Approach 2:
The patent combines two different types of rotational joints (universal joint and trunnion-driven joint with drive links) into a hybrid torque transfer system. By merging these different joint mechanisms and coordinating them through a torque splitter, the system achieves constant velocity torque transfer that neither joint type could accomplish alone.
2Reliability
If multiple universal joints are used to achieve constant velocity torque transfer, then constant velocity transfer is achieved, but inspection and replacement of joint parts becomes complicated
Solution Approach 1:
The second rotational joint is segmented into separate drive links that can be individually accessed, inspected, and replaced. Each drive link is a discrete component connected to the trunnion, allowing maintenance personnel to service specific components without disassembling the entire joint assembly.
Solution Approach 2:
The drive links are extracted as separate, removable components from the rotational joint assembly. This extraction allows the drive links to be easily removed, inspected, and replaced independently from the trunnion and other joint components, significantly simplifying maintenance operations.
3Reliability
If a hybrid dual-path torque transfer system with torque splitter is used, then constant velocity torque transfer is achieved and maintenance is simplified, but the device complexity increases
Solution Approach 1:
The torque splitter serves multiple functions: it divides torque into two portions, distributes torque to two different rotational joint configurations, and enables both constant velocity transfer and simplified maintenance. This multi-functionality justifies the added component by consolidating several requirements into a single element.
Data Source
AI summary
One example of a torque transfer system for a rotorcraft includes a first rotational joint connected to a rotorcraft rotary shaft. The first rotational joint receives a portion of a torque generated by rotation of the rotorcraft rotary shaft and transfers the portion of the torque to a rotorcraft rotating component. The torque transfer system also includes a second rotational joint of a different type connected to the rotorcraft rotary shaft. The second rotational joint receives a remainder of the torque generated by the rotation of the rotorcraft rotary shaft and transfers the remainder of the torque to the rotorcraft rotating component.