Segmented Cylindrical Roller Bearing for Wind Turbine Rotor Blade Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional cylindrical roller bearings used in wind turbines for rotor blade adjustment suffer from deformation under load, leading to uneven force distribution and increased stress in certain areas due to ovalization, requiring significant installation space and complex assembly.
Innovation Solution
A cylindrical roller bearing design with a first bearing ring divided into at least two partial rings and a second bearing ring with a groove, featuring two axial bearing rows and two radial bearing rows arranged at an axial distance, providing inward and outward radial support to prevent differential deformation and minimize radial space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional cylindrical roller bearing with one row of radial bearings is used, then the radial support is provided, but the bearing rings deform under load causing ovalization and uneven force distribution
Solution Approach 1:
The first bearing ring is divided into at least two partial rings separated by a radial gap, allowing independent deformation of each segment under load while maintaining overall structural integrity and preventing ovalization of the complete bearing ring
Solution Approach 2:
A lug protruding from one bearing ring engages with a groove in the other bearing ring, acting as an intermediary element that connects the partial rings and distributes forces evenly, preventing uncontrolled deformation while maintaining radial support capability
2Stability of the object's composition
If two opposite rows of cylindrical rollers are used to guide the nose ring in radial direction, then the rings cannot be deformed differently, but considerable installation space is required in radial direction
Solution Approach 1:
The second row of radial bearings is arranged at an axial distance from the nose in the axial direction rather than opposite each other in the radial direction, transferring the constraint mechanism from radial dimension to axial dimension and reducing radial space requirements
Solution Approach 2:
Dividing the first bearing ring into partial rings creates inherent radial guidance through the lug-groove engagement, reducing or eliminating the need for additional radial bearing rows and their associated installation space
3Stability of the object's composition
If the first bearing ring is divided into partial rings with radial gap, then uncontrolled deformation is prevented, but the assembly complexity increases
Solution Approach 1:
The partial rings are designed to be assembled in sequence through the radial gap, with each ring serving to constrain the previous one, creating a self-organizing assembly process that reduces complexity despite the divided structure
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a cylindrical roller bearing for absorbing axial and radial forces, comprising a first bearing ring (1) and a second bearing ring (2), which are arranged concentrically about an axis of rotation extending in the axial direction (x), wherein the second bearing ring (2) has a groove, which is open in a radial direction and in which a projection (4) of the first bearing ring (1) engages, wherein a first radial bearing row (5) and two axial bearing rows (7) spaced in the axial direction are arranged between the projection (4) and the groove (3), wherein the first radial bearing row (5) supports the first bearing ring (1) against the second bearing ring (2) in a first radial direction and wherein a second radial bearing row (8) is provided, which supports the first bearing ring (1) against the second bearing ring (2) in a second radial direction that is opposite to the first radial direction. According to the invention, the first bearing ring (1) is divided in the axial direction (x) into at least one first ring part (1a) having the projection (4) and one second ring part (1b), wherein the second radial bearing row (8) is arranged between the second ring part (1b) and the second bearing ring (2) at an axial distance from the projection (4).