Speed Increaser Roller Axial Spacing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing speed increasers with three rollers face interference issues when increasing the diameter of rollers to achieve a higher speed ratio, limiting the achievable speed ratio due to potential roller interference and stability concerns.
Innovation Solution
The speed increaser design features three rollers positioned at different axial locations along the high-speed shaft's rotation axis, ensuring non-overlapping contact areas and allowing for increased roller diameters without interference, thereby enabling a higher speed ratio without structural constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the diameter of rollers is increased to achieve a higher speed ratio, then the speed ratio is improved, but roller interference occurs limiting further increase
Solution Approach 1:
The patent transitions from a conventional single-plane roller arrangement to a three-dimensional configuration where rollers are positioned at different axial locations along the high-speed shaft. This spatial distribution in the axial dimension eliminates roller interference while permitting larger roller diameters, thereby achieving a higher speed ratio without the harmful interference effects that constrain traditional designs.
Solution Approach 2:
The patent divides the roller support function into multiple discrete rollers positioned at different axial segments along the high-speed shaft. This segmentation allows each roller to operate independently without interfering with others, enabling the use of larger diameter rollers that would otherwise cause interference in a compact single-plane arrangement, thus improving the speed ratio.
2Speed
If the diameter of the high-speed shaft is reduced to increase speed ratio, then the speed ratio is improved, but the high-speed shaft becomes less stable
Solution Approach 1:
By distributing rollers along the axial dimension rather than concentrating them at a single location, the patent provides multi-point support for the high-speed shaft. This three-dimensional support configuration enhances shaft stability even when the shaft diameter is reduced, as the distributed roller contacts prevent excessive deflection and maintain rotational stability.
Solution Approach 2:
The patent applies roller support at specific axial locations where contact areas are optimized for each position. By tailoring the local support characteristics at different axial segments, the high-speed shaft receives targeted stabilization where needed, allowing for reduced overall shaft diameter while maintaining adequate stability through localized reinforcement at roller contact points.
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 configuration allows for a desirable speed ratio to be achieved without interference, enabling the high-speed shaft to rotate at a higher speed than the low-speed shaft, and provides stable support for the high-speed shaft, allowing for increased power transmission.
Implementation Method 1
three rollers disposed within the ring member and in contact with both the peripheral wall and the high-speed shaft... the rotation of the low-speed shaft is transmitted to the high-speed shaft through the oil film
Implementation Method 2
when the low-speed shaft is rotated with oil sufficiently supplied, an oil film is formed at positions where the rollers are in contact with the peripheral wall and with the high-speed shaft
Data Source
AI summary
A speed increaser includes an annular peripheral wall rotatable with a rotation of the low-speed shaft, a high-speed shaft disposed within the peripheral wall and having a rotation axis extending in the same direction as that of the peripheral wall, and three rollers disposed within the peripheral wall and in contact with both the peripheral wall and the high-speed shaft. The three rollers are disposed at different positions along the rotation axis of the high-speed shaft with rotation axes of the three rollers extending in the same direction as the rotation axis of the high-speed shaft, and the rotation axes of the three rollers are spaced in a circumferential direction of the high-speed shaft. The three rollers are disposed so that at least part of contact areas between the high-speed shaft and the rollers is free from overlapping with each other along the rotation axis of the high-speed shaft.