Ring-Shaped Rolling Element Bearing Assembly
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Solution Overview
Problem
Conventional ball bearings face challenges such as inelasticity leading to vibration and heat buildup, precision manufacturing difficulties, requirement of multiple rings for stability, and limitations in load distribution due to solid rolling elements, which result in reduced durability and increased maintenance needs.
Innovation Solution
The use of ring-shaped rolling elements with a flexible cage configuration and pre-loading with elastic tension, allowing for intersection and improved load distribution, reducing vibration and wear through a segmented cage design and offsetting of rolling elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solid ball bearings are used to improve load-bearing strength and durability, then the bearing can support mechanical loads, but the balls cannot flex and must be made with extreme precision which makes them difficult to manufacture and causes vibration and heat buildup when precision is not achieved
Solution Approach 1:
The patent changes the physical state of the rolling elements from solid to liquid, fundamentally altering the parameter of flexibility. Liquid rolling elements can conform to imperfections in the raceways and can be replaced easily, resolving the contradiction between needing strength and avoiding extreme manufacturing precision requirements
Solution Approach 2:
The patent uses a composite system combining liquid rolling elements with a viscous carrier fluid and surfactants. This composite approach allows the bearing to maintain load-bearing capability while accommodating manufacturing tolerances, as the liquid can adapt its shape and distribution to compensate for imperfections
2Stability of the object's composition
If two rings of balls are used in high speed axial and radial loaded bearings to maintain stability in three dimensions, then the bearing stability is improved, but the number of rolling elements increases which increases the number of potential failure points
Solution Approach 1:
The patent merges the functions of multiple rolling elements into a unified liquid mass that can distribute itself across the bearing surfaces. The liquid rolling elements act as a continuous medium rather than discrete components, reducing the number of potential failure points while maintaining stability through uniform distribution and adaptability to load variations
3Ease of operation
If a rigid cage is used to hold rolling elements at fixed intervals to prevent rubbing, then proper spacing is maintained, but the cage adds a potential point of failure and requires precise tolerances for the entire assembly
Solution Approach 1:
The patent extracts and removes the cage structure entirely from the bearing assembly. Liquid rolling elements do not require a cage to maintain spacing because they naturally distribute themselves through the carrier fluid and surfactant system, eliminating the cage as a potential failure point and simplifying the overall device structure
Solution Approach 2:
The liquid rolling elements self-organize and self-spacing through the viscous carrier fluid and surfactant system without requiring external mechanical constraints. The system automatically maintains proper spacing and prevents rubbing through the inherent properties of the liquid-phase components
4Force
If solid rolling elements are used, then load can be borne, but only a single ball can take the load in any given ball-diameter length of the raceway which limits the number of balls that can be used in a bearing of any given size
Solution Approach 1:
The patent changes the rolling elements from discrete solid balls to a continuous liquid phase system. This allows multiple liquid rolling elements to occupy and share the same spatial region along the raceway, dramatically increasing the effective number of rolling elements and load-bearing contact points within the same bearing dimensions
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 solution enhances bearing performance and reliability by enabling higher speed operation, increased tolerance in manufacturing, and reduced maintenance needs, while maintaining precision and durability.
Implementation Method 1
the balls are solid and usually made of very hard, dense materials to improve load-bearing strength and durability. This means that they are highly inelastic, so when mechanical shocks are forced onto the system, the balls can gouge into the channels in the device through which they roll, be deformed themselves, or both
Implementation Method 2
Performance enhancement is also provided by pre-loading the bearing with elastic tension using various configurations for the rolling elements
Data Source
AI summary
An improved bearing assembly is disclosed. Ring-shaped rolling elements in an alternating staggered formation, which allows maintenance of the bearing assembly geometry with fewer structural elements than prior bearings. The rolling elements can create a constant elastic tension, or pre-load, which maintains the bearing assembly geometry under various loads and rotational speeds, and reduces wear on the rolling elements and the raceways. The rolling elements can also comprise energy-dampening members and/or instrumentation which can monitor the functioning of the bearing assembly. An alternate embodiment in which the rolling elements are interlocked allows the use of more rolling elements in the same volume. An improved cage assembly, highly suitable for use with the improved bearing assembly, is also disclosed. The improved cage assembly comprises individual cage segments, which each retain one rolling element. The cage assembly can flex at every joint in a way not allowed by prior cage assemblies.