Angular Contact Roller Bearing With Factory-Set Preload
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Solution Overview
Problem
The setting of optimal bearing play or preload in large multi-row tapered roller bearings is labor-intensive and prone to errors, requiring precise adjustments of fit tolerances, contact pressure, and screw preload, which increases manufacturing and maintenance costs and risks in applications like wind energy plants.
Innovation Solution
A tapered roller bearing design featuring an undivided inner ring and outer ring with inclined raceways for rolling elements, eliminating the need for individual adjustments by setting the bearing play or preload at the factory, allowing direct assembly without adjustments, and incorporating spacers or cage segments for maintaining rolling element distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If bearing clearance or preload is adjusted individually during assembly using angle rings and bolts, then optimal bearing performance can be achieved, but the assembly process becomes labor-intensive and time-consuming with high risk of error
Solution Approach 1:
The bearing clearance or preload is pre-adjusted during manufacturing by positioning the inner ring or outer ring at a specific axial location relative to the bearing raceway. This preliminary action eliminates the need for individual adjustment during assembly, reducing assembly time and potential errors while maintaining optimal bearing performance
Solution Approach 2:
The bearing design incorporates features such as shouldered rings or integrated positioning structures that automatically maintain the pre-set clearance or preload during assembly. The structure itself serves the function of clearance control without requiring additional adjustment mechanisms or operations
2Adaptability or versatility
If the inner ring or outer ring is divided into multiple segments for clearance adjustment, then bearing clearance can be modified, but the structural complexity and number of components increase
Solution Approach 1:
The adjustment function is extracted from the bearing structure itself and performed during manufacturing. The inner ring or outer ring is positioned at a specific axial location relative to the bearing raceway to establish the desired clearance or preload, eliminating the need for segmented structures or additional adjustment components
3Manufacturing precision
If fit tolerances and angle ring dimensions are precisely controlled to ensure optimal bearing clearance, then bearing performance improves, but manufacturing costs increase
Solution Approach 1:
The precise positioning for optimal clearance is established during manufacturing by placing the inner ring or outer ring at a specific axial location. This preliminary action ensures consistent bearing performance while allowing for standard fit tolerances in mass production, reducing manufacturing costs compared to individual adjustment requirements
Data Source
Figure 1
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AI summary
The invention relates to an angular contact roller bearing having an inner ring and an outer ring, between which two or more raceways for a plurality of rolling elements are formed, the rolling elements being designed to roll in their respective raceways in the circumferential direction of the angular contact roller bearing, and the raceways and the rolling elements having cross-sections corresponding to one another at least approximately. A cross-section of a rolling element containing the central longitudinal axis has an at least approximately rectangular design and an imaginary diagonal through the cross-section of the rolling element which for all rolling elements on a raceway of the angular contact roller bearing is arranged on an imaginary surface at least approximately in the form of a cylindrical casing. The ratio of a transverse dimension of the rolling element to its length is characteristic of an angle at which the raceway of the rolling element is inclined relative to the central longitudinal axis of the angular contact roller bearing.