Self-Aligning Bearing Assembly for Solar Tracker Terrain Adaptation
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Solution Overview
Problem
Conventional bearing assemblies for tracker systems, such as those used in solar trackers, face challenges in efficiently accommodating ground undulations and maintaining low maintenance and cost-effective installation, particularly in renewable energy applications.
Innovation Solution
The proposed bearing assembly features an adapter and housing with a low friction material interface, allowing for self-aligning adjustments of the adapter and rail relative to the support beam, enabling compensation for axial misalignments and improved resistance to corrosion and stick-slip issues, while using materials like polyether ether ketone (PEEK) and fluoropolymers for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bearing assemblies are used in tracker systems, then the structure provides basic rotational support, but it fails to effectively accommodate ground undulations and is prone to corrosion and stick-slip issues
Solution Approach 1:
The patent changes the material parameter from conventional metals to fluoropolymer composites, which fundamentally alters the friction and corrosion resistance properties. This material parameter change enables the bearing assembly to resist corrosion and stick-slip issues while accommodating terrain variations through the low-friction surface properties of the fluoropolymer
Solution Approach 2:
The patent employs composite materials consisting of fluoropolymer matrices reinforced with fibers or fillers. This composite structure combines the corrosion resistance and low friction of fluoropolymers with the mechanical strength of reinforcement materials, simultaneously achieving reliability against corrosion and adaptability to ground undulations
2Reliability
If ground preparation is performed to accommodate surface undulations, then tracking assembly stability improves, but installation cost and complexity increase
Solution Approach 1:
The bearing assembly is designed to self-accommodate ground undulations through its low-friction fluoropolymer surfaces and structural flexibility, eliminating the need for external ground preparation services. The system serves itself by absorbing terrain variations through the bearing's inherent design properties rather than requiring pre-installation ground work
Solution Approach 2:
The bearing assembly incorporates dynamic elements that allow it to adapt to varying ground conditions during operation. The low-friction surfaces and structural design enable the bearing to self-adjust and accommodate terrain undulations dynamically, providing stability without requiring static ground preparation
3Productivity
If low friction materials like PEEK and fluoropolymers are used in the bearing assembly, then operational efficiency and resistance to stick-slip issues improve, but material cost increases
Solution Approach 1:
The patent applies expensive fluoropolymer materials specifically at the friction interface and critical contact surfaces of the bearing assembly, rather than throughout the entire structure. This local application concentrates the high-performance material where it is most needed for operational efficiency, while minimizing overall material cost by using conventional materials for non-critical components
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 the operational efficiency, reduces maintenance, and lowers installation costs, thereby increasing the deployment potential of tracker assemblies and renewable energy structures by improving resistance to corrosion and stick-slip issues and accommodating terrain undulations.
Implementation Method 1
a low friction material is present at an interface between an exterior surface of adaptor and an interior surface of the adjustable housing portion
Data Source
AI summary
A bearing assembly of a power generation structure including, a rail; and a housing adapted to support the rail; where the housing includes a fixed housing portion attached to a support beam, and an adjustable housing portion attached to rail, where a low friction material is present at an interface between an exterior surface of rail and an interior surface of the adjustable housing portion, where the adjustable housing portion is capable of self-aligning adjustment of at least a portion of the rail out of alignment with a central axis of the support beam.