Split Inner Ring Bearing With Continuous Preload Control
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Solution Overview
Problem
Existing double-row rolling bearings primarily rely on external forces for preload during installation, limiting the inner ring's mobility and resulting in non-continuous preload under varying operating conditions, affecting running characteristics and service life.
Innovation Solution
The inner ring is split into two parts and preloaded against each other using a central preloading element, such as a spring, allowing continuous preload and variable bearing clearance, enhancing running characteristics and service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner ring is pressed or shrunk onto the shaft during mounting, then the bearing is fixed in position, but the inner ring becomes immobile and cannot maintain continuous preload under varying operating conditions
Solution Approach 1:
The inner ring is divided into two separable inner ring parts that can move relative to each other axially. This segmentation allows the inner ring assembly to maintain mobility while fixed to the shaft, enabling continuous preload adjustment under varying operating conditions without compromising the fixed position requirement.
Solution Approach 2:
The preloading means is designed to dynamically adjust the axial position of the inner ring parts relative to each other in response to changing operating conditions such as temperature variations and load fluctuations. This dynamic adjustment capability ensures continuous optimal preload while maintaining the bearing's fixed position on the shaft.
2Reliability
If external force is used for preload during installation, then the bearing is preloaded, but the preload is not continuous under varying operating conditions
Solution Approach 1:
The preloading means is designed to automatically adjust and maintain optimal preload under varying operating conditions without requiring external intervention or complex control systems. The inner ring parts self-adjust their relative axial position in response to temperature and load changes, ensuring continuous preload while keeping the mechanism relatively simple.
3Reliability
If the inner ring is fixed after mounting, then the bearing position is stable, but the running characteristics and service life are reduced due to non-continuous preload
Solution Approach 1:
Dividing the inner ring into two parts that can move relative to each other allows the bearing to maintain a stable overall configuration while enabling internal adjustment. This segmentation permits continuous preload maintenance that improves service life without compromising the bearing's fixed position and structural stability.
Solution Approach 2:
The ability to change the axial distance between inner ring parts allows the bearing to adapt to varying operating conditions such as temperature changes and load variations. This parameter adjustment capability extends service life by maintaining optimal running characteristics while the bearing remains stably positioned in the housing.
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 split inner ring design with a central preloading element ensures a constant preload, improving bearing performance under temperature variations and load fluctuations, and compensates for short-term high loads.
Implementation Method 1
The preloading element applies a preload F (axial) of between 0.0001 and 0.15*basic static load rating C0r of the rolling bearing
Data Source
AI summary
A double-row rolling bearing, having a split inner ring, an outer ring, rolling elements, and at least one cage. The split inner ring having at least on inner ring race, and the outer ring (4) having at least one outer ring race. The rolling elements being arranged such that they are mutually spaced in the cage and roll between the inner ring and the outer ring, and the rolling elements being designed as rolling element rollers, and the bearing being designed in an X arrangement. The split inner ring is split into two annular inner ring parts, and the two inner ring parts are preloaded with a preloading means arranged therebetween.