Ceramic Roller Bearing for Hot-Dip Guide Roll Wear
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Solution Overview
Problem
Existing guide roller pivot bearings in molten metal baths experience high wear and tear, leading to frequent replacements and associated high costs, and have complex disassembly issues.
Innovation Solution
A guide roller pivot bearing design featuring a ceramic bushing with axially displaced cylindrical rollers, a central ring with a convex surface, and a concave outer ring, which provides high wear resistance and easy replacement of worn parts, while compensating for alignment errors and axial displacements with a high radial load-bearing capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sliding bearing device is used in the molten metal bath, then the guide roller can be mounted and operated, but high wear and tear occurs leading to frequent replacements and high costs
Solution Approach 1:
The patent employs ceramic materials (such as silicon nitride or silicon oxide) for the bearing components instead of traditional metallic sliding bearings. These ceramic materials exhibit superior wear resistance and chemical inertness in molten metal environments, dramatically reducing wear and tear while maintaining operational reliability over extended periods.
Solution Approach 2:
The invention transitions from a sliding bearing mechanism to a roller bearing mechanism with cylindrical rollers arranged in a cage. This mechanical substitution reduces friction and wear by replacing sliding contact with rolling contact, thereby extending service life and reducing replacement frequency in the harsh molten metal bath environment.
2Reliability
If a center ring connected to pivot arm by hinge-like extensions is used, then the bearing structure is formed, but disassembly becomes complicated
Solution Approach 1:
The bearing device is divided into separable modular components including the outer ring fixed to the pivot arm, the center ring with cylindrical rollers, and the cage holding the rollers. This segmentation allows individual components to be independently replaced or maintained without disassembling the entire bearing structure, significantly simplifying repair operations while maintaining structural stability during operation.
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 significantly reduces wear and tear, allowing for quick and easy replacement of bearing parts and enhances torsional strength, maintaining operational efficiency in high-temperature molten metal environments.
Implementation Method 1
cylindrical rollers which can be displaced axially in both directions are arranged as rolling elements on the socket
Implementation Method 2
The bush, the cylindrical rollers, the middle ring and the outer ring are made of ceramic material
Data Source
Figure 1
Figure 2
AI summary
The Guide roller-pivot bearing comprises a shaft rotatably arranged in the molten metal in bearing device, and middle ring (14), whose surface guided towards outside is implemented in longitudinal section in convex manner. The bearing devices are arranged on shank arms. The shaft end (6) comprises a bush (8) that forms the interior ring of the bearing device. Cylinder rollers (11) are arranged as roller body on the bush. The bush, the cylinder rollers and the middle ring consist of ceramic materials. The cylinder rollers movable in both axial directions are arranged on the bush. The Guide roller-pivot bearing comprises a shaft rotatably arranged in the molten metal in bearing device, and middle ring (14), whose surface guided towards outside is implemented in longitudinal section in convex manner. The bearing devices are arranged on shaft arms. The shaft end (6) comprises a bush (8) that forms the interior ring of the bearing device. Cylinder rollers (11) are arranged as roller body on the bush. The bush, the cylinder rollers and the middle ring consist of ceramic materials. The cylinder rollers movable in both axial directions are arranged on the bush and are fixed in the middle ring through two board elements (12, 13). The surface of the middle ring directed towards outside lies at an internal surface of an external ring that is tightly arranged over a bearing housing on the shaft arms. The external ring consists of ceramic material.