Angular Contact Roller Bearing With Preset Clearance Assembly
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Solution Overview
Problem
Large-size angular contact roller bearings used in energy plants face high costs and risks in setting optimal bearing clearance and preload, due to uncertainties in fit tolerances and screw preload, which complicates mounting and maintenance.
Innovation Solution
The angular contact roller bearing design eliminates the need for individual setting of bearing clearance or preload by using a non-split inner and outer ring with raceways and rolling elements adapted to roll in the peripheral direction, where the rolling elements' cross-sections correspond to the raceways, allowing for complete contact and reduced pitting, and the rings can be mounted without adjustment work.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If bearing clearance or preload is adjusted by means of an angle ring screwed on at the side, then the bearing clearance can be set, but the setting process is costly in terms of personnel and time and involves a high risk of error
Solution Approach 1:
The optimal bearing clearance is predetermined and built into the bearing design during manufacturing, eliminating the need for time-consuming field adjustments. The angle ring and screw connection are designed with fixed geometric relationships that automatically provide the correct clearance without requiring personnel to perform adjustment operations on-site.
2Ease of operation
If the inner ring or outer ring is split for clearance setting, then the bearing clearance can be adjusted, but the structural complexity increases and mounting becomes more difficult
Solution Approach 1:
The bearing is segmented into modular components (inner ring, outer ring, angle ring, rolling elements) that can be independently manufactured and assembled. The angle ring acts as a separate adjustment component that interfaces with the screw connection, allowing clearance adjustment without splitting the main bearing rings. This modular segmentation simplifies mounting while maintaining adjustability.
3Reliability
If fit tolerances and screw preload are used for clearance setting, then the bearing can be assembled, but uncertainties about actual size lead to errors
Solution Approach 1:
The bearing design uses self-compensating geometric relationships where the angle ring and screw connection work together to automatically establish the correct bearing clearance. The system self-adjusts for variations in fit tolerances and screw preload through its inherent mechanical geometry, eliminating the need for high-precision manufacturing tolerances and reducing uncertainty about actual clearance values.
Data Source
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.