Composite Bearing Separator for High-Temperature Sterile Use
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Solution Overview
Problem
Cages and separators for rolling element bearings made of polymeric materials like PEEK are expensive and unsuitable for high-temperature applications, posing challenges in sterile environments such as semiconductor manufacturing and food processing.
Innovation Solution
A composite material comprising a mixture of a polymer base, reinforcing fibers, and a lubricant is used to form separators, which are machined and cut to create a central pocket for rolling elements, providing a cost-effective solution suitable for high-temperature environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separators are made of PEEK or similar polymeric materials, then they provide sterile environment suitability and dimensional stability, but manufacturing cost increases significantly
Solution Approach 1:
The patent applies composite materials by combining polymer base material with reinforcing fibers (such as glass, carbon, or aramid fibers) and lubricant additives. This composite structure provides the necessary mechanical strength, dimensional stability, and sterile environment suitability while using more cost-effective materials compared to pure PEEK, thereby resolving the contradiction between reliability and manufacturing cost.
2Stability of the object's composition
If separators are made of PEEK or similar polymeric materials, then they maintain dimensional stability, but they are unsuitable for high-temperature applications
Solution Approach 1:
The patent incorporates reinforcing fibers (glass, carbon, or aramid) into the polymer matrix to create a composite material that maintains dimensional stability at high temperatures. The fibers provide thermal stability and structural integrity, allowing the separator to withstand temperatures up to 200°C or higher while maintaining its shape and mechanical properties, thus resolving the contradiction between dimensional stability and temperature tolerance.
Solution Approach 2:
The patent modifies the material parameters by changing the polymer base composition and adding specific fiber reinforcements designed to withstand high temperatures. This parameter change transforms the material properties to achieve both dimensional stability and high-temperature suitability, overcoming the limitations of standard polymeric materials like PEEK.
3Temperature
If separators are made of composite material with reinforcing fibers, then temperature tolerance improves, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple functions into the composite material itself: the polymer base provides structural framework, reinforcing fibers provide thermal stability and strength, and lubricant additives reduce friction. This consolidation of multiple material functions into a single composite material simplifies the overall manufacturing process compared to assembling separate components, thereby resolving the contradiction between temperature tolerance and manufacturing complexity.
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 composite separators offer reduced manufacturing costs and improved temperature tolerance up to 200°C, maintaining dimensional stability and reducing friction, making them suitable for sterile environments.
Implementation Method 1
The composite material includes a mixture of a polymer base, reinforcing fibers and a lubricant
Data Source
AI summary
A separator for rolling elements of a bearing includes a body formed of a composite material and having a central pocket sized to receive one of a plurality of rolling elements, a first contact end to contact one adjacent rolling element and an opposing, second contact end to contact another adjacent rolling element. The composite material includes a mixture of a polymer base, reinforcing fibers and a lubricant, preferably, polyetherimide, short strand carbon fibers and molybdenum disulfide. The separator body is sized such that a first distance between a pocket centerline and the first contact end establishes a desired spacing distance between the rolling element within the pocket and the one adjacent one rolling element and a second distance between the centerline and the second contact end establishes a desired spacing distance between the rolling element within the pocket and the other adjacent rolling element.