Multi-Bearing Cage Assembly for High-Speed Alignment and Lubrication
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Solution Overview
Problem
High-speed rolling bearings in assemblies like planetary mills and gearboxes face misalignment and seizure due to unequal friction forces and lack of lubrication, leading to overheating and increased wear, especially under high centrifugal loads.
Innovation Solution
A bearing assembly with a toothed cage extending beyond the bearings and a fixed supporting centering sleeve with oil supply channels, along with a two-part cylindrical cage design to accommodate different slippage velocities, addresses misalignment and wear by ensuring proper lubrication and reducing friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single rolling bearing with a cage is used, then the structure is simple, but misalignment and seizure occur due to unequal friction forces at different cage contact locations
Solution Approach 1:
The invention divides the bearing system into multiple independent rolling bearings (at least two) with separate cages, each bearing-cage assembly operating independently. This segmentation allows each bearing to be properly aligned and lubricated separately, eliminating the misalignment and seizure problems that occur in single-bearing designs where unequal friction forces act on a shared cage.
2Productivity
If high rotational speed is achieved, then productivity increases, but inertial forces cause slippage of rolling elements and increased wear
Solution Approach 1:
By segmenting the bearing assembly into multiple independent bearing-cage units, each rolling element set operates with its own cage, reducing the cumulative inertial forces and slippage that occur in single-bearing designs at high speeds.
Solution Approach 2:
The invention introduces a lubrication system with channels that deliver lubricant to the bearing assemblies. This hydraulic lubrication reduces friction and wear between rolling elements and raceways, enabling high-speed operation without the excessive wear that would otherwise occur due to inertial slippage.
3Force
If high centrifugal loads are applied, then the bearing can handle heavy loads, but friction forces cause overheating and seizure
Solution Approach 1:
Dividing the bearing system into multiple independent bearing-cage assemblies distributes the centrifugal loads across separate units, preventing the concentration of friction heat that leads to overheating and seizure in single-bearing designs.
Solution Approach 2:
The lubrication channels deliver lubricant to each bearing assembly, providing continuous cooling and friction reduction. This hydraulic lubrication system removes heat generated by friction under high centrifugal loads, preventing overheating and seizure while maintaining load-carrying capacity.
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 solution enhances the reliability, wear-resistance, and durability of the bearing assembly by eliminating misalignment, reducing friction, and managing slippage differences at high rotational speeds, thereby extending the service life under extreme centrifugal forces.
Implementation Method 1
the channels for oil supply into the clearance between the cylindrical part of the cage and the fixed supporting centering sleeve enabled reduction in the friction
Implementation Method 2
where the bearings are subject to significant centrifugal loads exceeding the gravity acceleration by hundred times
Data Source
AI summary
The rolling bearing design incorporates at least two antifriction bearings, a fixed supporting centering sleeve and a toothed cage with an extended cylindrical part, extending outside the dimensions of the bearings, and sockets in the form of a crown on both sides of the cylindrical part of the cage. The fixed supporting centering sleeve of the cage incorporates channels for oil supply to the cage. The extended cylindrical part of the cage between the adjacent bearings in the assembly can be made up of two parts with the possibility to slip relative to each other. The invention enables improvement in the reliability, wear-resistance and durability of the bearing assemblies incorporating at least two bearings, including those of different types and sizes, which operate at high speeds and are subject to significant centrifugal loads exceeding the gravity acceleration by hundred times.