Polycrystalline Diamond Radial Bearing Under Speed and Pressure Limits
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Solution Overview
Problem
Polycrystalline diamond radial bearings fail when used with diamond reactive materials due to chemical interaction, leading to rapid wear and failure, especially at high loads and temperatures, and the precise shaping and alignment requirements are costly and prone to errors.
Innovation Solution
A radial bearing assembly with polycrystalline diamond elements in sliding engagement with diamond reactive materials, where the sliding speed is limited below 10.5 m/s and the maximum contact pressure is calculated and adjusted to ensure it remains below a preset allowable pressure, allowing for the deployment of a minimum number of polycrystalline diamond elements to prevent edge clashing and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polycrystalline diamond elements are used with diamond reactive materials, then wear resistance is improved, but chemical interaction causes rapid wear and failure
Solution Approach 1:
The patent changes critical parameters including limiting sliding speed to below 10.5 m/s and controlling contact pressure to remain below preset allowable pressure. These parameter modifications prevent the chemical interaction that causes diamond graphitization and wear, thereby resolving the contradiction between wear resistance and service life when using polycrystalline diamond with diamond reactive materials
Solution Approach 2:
The patent applies preliminary anti-action by pre-establishing design constraints that prevent harmful chemical interactions before they occur. By calculating and limiting contact pressure and sliding speed in the design phase, the patent prevents the conditions necessary for diamond-catalyst chemical reactions, thus preventing wear and failure before they can occur
2Manufacturing precision
If precise shaping and alignment of polycrystalline diamond elements is performed, then bearing performance is improved, but manufacturing cost and error risk increase
Solution Approach 1:
The patent applies partial action by requiring precise shaping and alignment only at the engagement surfaces of polycrystalline diamond elements, rather than entire elements. This selective precision approach maintains bearing performance while significantly reducing manufacturing complexity and cost compared to requiring precision throughout the entire component
Solution Approach 2:
The patent applies local quality by concentrating manufacturing precision requirements specifically at the engagement surfaces where contact occurs, while allowing less precision in non-critical areas. This localized precision approach ensures proper bearing function at contact points while reducing overall manufacturing difficulty and cost
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
The solution enables the effective use of polycrystalline diamond elements with diamond reactive materials by reducing wear and friction, allowing for stable operation at typical bearing loads and speeds, while minimizing processing costs and errors, and enhancing the service life of the bearings.
Implementation Method 1
The solution enables the effective use of polycrystalline diamond elements with diamond reactive materials by reducing wear and friction
Data Source
AI summary
A radial bearing assembly is provided. The radial bearing assembly includes polycrystalline diamond elements, each having an engagement surface in sliding engagement with an opposing engagement surface. The opposing engagement surface includes a diamond reactive material. The radial bearing assembly may be deployed in a variety of components and applications, including in rotor and stator assemblies. Also provided are methods of use of the radial bearing assembly, as well as methods of designing the radial bearing assembly.