Sigma Cage Thrust Bearing Layout for Even Roller Load Distribution
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Solution Overview
Problem
Existing roller thrust bearings with single-piece metal cages face challenges in efficiently supporting axial loads due to limitations in roller pocket configuration and distribution, which can lead to uneven load distribution and reduced bearing performance.
Innovation Solution
A thrust bearing assembly featuring a cage with an annular portion that includes multiple rows of roller pockets, where the first plurality of roller pockets are defined in all concentric valleys and hills, and the second plurality of roller pockets are defined in specific valleys and hills, allowing for even distribution and alignment of roller elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-piece metal cage with traditional roller pocket configuration is used, then the cage provides structural support and roller retention, but the load distribution becomes uneven and bearing performance is reduced
Solution Approach 1:
The cage is divided into multiple functional zones with different roller pocket configurations. The first zone has roller pockets arranged to handle radial loads, while the second zone has roller pockets arranged to handle axial loads. This segmentation allows each zone to optimize load distribution for its specific load direction, resolving the contradiction between structural support and uneven load distribution.
Solution Approach 2:
Different regions of the cage are given different local qualities through varied roller pocket configurations. The first zone features roller pockets with specific orientations for radial load handling, while the second zone has differently oriented roller pockets for axial load handling. This local differentiation enables even load distribution across the entire bearing assembly.
2Device complexity
If roller pockets are evenly spaced in a traditional configuration, then the cage structure is simple, but the alignment and spacing of roller elements cannot be optimized for multi-directional loads
Solution Approach 1:
The cage design transitions from a single-plane roller pocket arrangement to a multi-dimensional configuration with two distinct zones. The first zone arranges roller pockets for radial load alignment, while the second zone arranges roller pockets for axial load alignment. This dimensional expansion allows optimized roller element alignment for multiple load directions without excessive complexity.
Data Source
AI summary
A thrust bearing assembly comprises a cage including an annular portion. A first flange extends axially from an inner peripheral edge of the annular portion, and a second flange extends axially from an outer peripheral edge of the annular portion. A first plurality of roller pockets are defined by the annular portion, the first roller pockets of the first plurality of roller pockets being spaced evenly about the annular portion. A second plurality of roller pockets are defined by the annular portion, the second roller pockets of the second plurality of roller pockets being evenly spaced about the annular portion so that each second roller pocket is disposed between adjacent first roller pockets.