Bearing Rollers With Variable Skewing Angles For Heat Dissipation
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Solution Overview
Problem
In bearing systems, particularly roller thrust bearings, the increased power density requirements lead to issues like sliding and skidding due to uneven rotational stresses, which result in increased friction and heat dissipation disparities among rollers, limiting their performance in high-power applications.
Innovation Solution
The design incorporates a base with slots configured to retain rollers at varying skewing angles, optimizing heat dissipation by adjusting skewing angles based on the friction radius of each roller, and utilizing a retainer with integrated cooling channels and additive manufacturing techniques for improved manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If additional rollers are added to each stage to meet increased power density requirements, then the power transmission capability is improved, but the space constraint within the retention cage limits the total number of rollers that can be accommodated
Solution Approach 1:
The patent applies local quality by varying the skewing angle of rollers based on their specific radial position within the retention cage. Rollers at different radial locations are assigned different skewing angles optimized for their local conditions, allowing each roller to operate more efficiently within the constrained space while collectively handling higher power loads
2Quantity of substance
If rollers are disposed at larger skewing angles to accommodate more rollers in limited space, then the space utilization is improved, but skidding and friction effects increase
Solution Approach 1:
The patent implements local quality by assigning different skewing angles to rollers based on their radial position. Inner rollers receive different skewing angle treatment compared to outer rollers, optimizing each position to minimize skidding and friction while maximizing the number of rollers that can be effectively packed into the retention cage
Solution Approach 2:
The patent applies dynamics by making the skewing angle a variable parameter rather than a fixed value. The skewing angle is dynamically adjusted based on the roller's radial position and operating conditions, allowing the system to adapt to varying load and speed conditions while minimizing energy loss from friction and skidding
3Speed
If rollers at outer radial positions rotate greater amounts relative to inner rollers, then the rotational flexibility is improved, but sliding and skidding occur due to uneven rotational stresses
Solution Approach 1:
The patent addresses rotational stability by applying local quality through position-dependent skewing angles. Each roller's skewing angle is specifically tailored to its radial position, compensating for the differential rotational speeds and preventing sliding and skidding that would otherwise occur due to uneven rotational stresses across the roller array
Data Source
AI summary
A bearing including a base, a plurality of slots, and a plurality of rollers disposed in the plurality of slots. At least one of the plurality of slots may be configured to retain a first roller and a second roller of the plurality of rollers at different skewing angles. Methods for manufacturing bearings are also described. In an embodiment, a method of manufacturing a bearing includes providing a first plurality of base layers. The first plurality of base layers may include portions of a plurality of slots and portions of a plurality of cooling channels. The method may include inserting a roller in at least one of the portions of the plurality of slots and providing a second plurality of base layers.