Offset Rotor Involute Curves for Load Transfer
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Solution Overview
Problem
Existing energy conversion devices and timing gears face inefficiencies in load transfer and backlash management due to collinear rotor axes and conventional gear designs, which limit their performance in energy conversion and precision motion applications.
Innovation Solution
The use of spherical involute curves on offset rotors for intermeshing lobes, with teardrop or oval shapes and spiral transformations, to enhance rolling contact and load transfer, and the implementation of bevel gear pairs with spiral teeth for minimal backlash and improved torque transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If collinear rotor axes are used in energy conversion devices, then the device structure is simpler, but load transfer efficiency is reduced and machine noise increases
Solution Approach 1:
The patent applies asymmetry by configuring the rotor axes to be offset rather than collinear, creating an asymmetric spatial relationship between the first and second rotors. This asymmetric offset configuration enables improved load transfer efficiency and reduced machine noise by optimizing the interaction between the lobes during rotation, directly resolving the technical contradiction between structural simplicity and performance.
2Ease of manufacture
If conventional gear designs are used, then manufacturing is easier, but backlash management is insufficient and precision is reduced
Solution Approach 1:
The patent employs spherical involute curves to define the lobe surfaces of the rotors, replacing conventional straight or simple curved gear tooth profiles. This spherical curvature enables precise backlash management and improved contact ratios while maintaining manufacturability through standardized spherical surface generation techniques, resolving the contradiction between ease of manufacture and precision.
Solution Approach 2:
The patent utilizes spiral transformations and varying curvature parameters in the spherical involute curves to optimize the gear tooth geometry. By adjusting these geometric parameters, the design achieves minimal backlash and enhanced precision while remaining manufacturable, directly addressing the technical contradiction between manufacturing ease and precision.
3Strength
If spherical involute curves with offset rotors are used, then load transfer efficiency and contact ratio improve, but device complexity increases
Solution Approach 1:
The spherical involute curve geometry serves multiple functions simultaneously: it enables improved load transfer efficiency, reduces machine noise, achieves minimal backlash, and provides enhanced contact ratios. This multi-functionality of the spherical surface geometry allows the patent to strengthen load transfer capabilities while managing device complexity through a unified geometric approach.
Data Source
AI summary
The present disclosure describes the use of involute curves for use in energy conversion devices, as well as timing or indexing gears. Several different embodiments are shown using rotors of several examples of lobe numbers and shapes.