Segmented Plain Bearing Pads for Radial and Axial Wind Loads
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Solution Overview
Problem
Conventional sliding bearings for wind turbines face challenges in effectively absorbing both radial and axial forces, and in maintenance, as they often require complex assembly and disassembly processes.
Innovation Solution
A sliding bearing design featuring an inner and outer ring element with spherical cap-shaped sliding bearing pads that absorb radial and axial forces, allowing for easy maintenance by removable bearing block covers and anti-rotation mechanisms, along with a connecting element for securing pads, and a hydrodynamic design for reduced friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional sliding bearings are designed to absorb both radial and axial forces, then the force absorption capability is improved, but the structural complexity and maintenance difficulty increase
Solution Approach 1:
The sliding bearing is divided into multiple sliding bearing pads (first, second, third, and fourth pads) arranged around the inner ring element. Each pad can independently absorb forces in specific directions, allowing the bearing to handle both radial and axial forces through the collective action of segmented pads rather than a single complex structure
Solution Approach 2:
Each sliding bearing pad is designed with a spherical cap bearing surface that can simultaneously contribute to both radial and axial force absorption. The pads serve multiple functions: supporting radial loads through their curved surfaces and accommodating axial loads through their arrangement and movement capability, eliminating the need for separate radial and axial bearing components
2Ease of repair
If sliding bearing pads are made removable for maintenance, then the ease of repair is improved, but the reliability and stability of the bearing structure may worsen
Solution Approach 1:
The bearing is segmented into removable sliding bearing pads that can be individually accessed and replaced. The bearing block cover can be removed to provide access to the pads, allowing maintenance without disassembling the entire bearing structure. This segmentation enables easy repair while maintaining structural integrity during operation
Solution Approach 2:
The sliding bearing pads are pre-equipped with attachment mechanisms (such as fastening elements or retention features) that secure them to the inner ring element during operation. These preliminary securing measures ensure reliable attachment during normal use while allowing for intentional removal during maintenance, balancing stability with serviceability
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 design enhances force absorption efficiency, simplifies maintenance, and reduces friction, leading to improved performance and longevity of the sliding bearing.
Implementation Method 1
the individual sliding bearing pads each have a bearing surface, which has the basic shape of a spherical cap
Implementation Method 2
a hydrodynamic design for reduced friction
Data Source
AI summary
A sliding bearing includes an inner ring element; an outer ring element; and at least one sliding bearing element, which is arranged between the inner ring element and the outer ring element, wherein the sliding bearing element includes at least two sliding bearing pads, wherein the individual sliding bearing pads each have a bearing surface, which has the basic shape of a spherical cap.