Sealed Self-Aligning Soil Roller Bearing for Contamination Control
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Solution Overview
Problem
The existing bearing arrangements in agricultural machines, particularly those with rotating elements like ground rollers, are vulnerable to external contaminants and lubricant leakage, which can lead to reduced service life and environmental pollution.
Innovation Solution
A sealing arrangement that seals the circumferential gap between the bearing journal and housing, combined with a pendulum bearing design and oil bath lubrication, prevents contamination and lubricant leakage while allowing for angular misalignment compensation and easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bearing unit is left open for easy access and mounting, then ease of operation is improved, but contamination from external influences increases
Solution Approach 1:
A sealing ring is introduced to seal the bearing housing, creating a protective barrier that prevents contamination from dirt, dust, and plant debris while maintaining easy access for mounting and maintenance. The sealing ring forms a flexible yet effective shield that does not compromise the ease of operation.
2Reliability
If the bearing housing is sealed to prevent contamination, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The bearing housing is designed as a segmented structure with a removable cover or access point. The sealing ring is integrated into this segmented design, allowing the housing to be opened for maintenance while maintaining the seal during operation. This segmentation enables easy maintenance access without compromising the protective sealing function.
3Ease of operation
If lubricant is used to reduce friction, then ease of operation is improved, but harmful factors increase due to leakage and pollution
Solution Approach 1:
The sealing ring creates a closed system around the lubricant, preventing leakage while allowing the lubricant to perform its friction-reducing function. The seal maintains the lubricant containment necessary for smooth operation while preventing environmental pollution from leaking lubricant.
4Strength
If the bearing components are made robust to withstand external influences, then strength is improved, but device complexity increases
Solution Approach 1:
Rather than making the entire bearing structure more robust and complex, a relatively simple sealing ring is introduced. This sealing component provides effective protection against external influences without significantly increasing the overall device complexity, maintaining a clean and straightforward design.
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 extends the service life of the bearing unit by protecting it from external influences and ensuring continuous lubrication, reducing maintenance needs and environmental impact.
Implementation Method 1
the sealing arrangement is configured to seal a circumferential gap between the bearing journal and the bearing housing, preferably at least approximately in a liquid-tight and/or dust-tight manner
Implementation Method 2
The rolling bearing is designed as a self-aligning bearing with preferably barrel-shaped or spherical rolling elements, and the bearing unit is configured by means of the self-aligning bearing to compensate for angular misalignment
Implementation Method 3
combined with a pendulum bearing design and oil bath lubrication
Data Source
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AI summary
Agricultural machine with a soil roller (7) and a support frame (8) associated with the soil roller (7), wherein the soil roller (7) is rotatably connected to the support frame (8) via at least one bearing journal (2) and via at least one bearing unit (1) comprising a bearing housing (3), wherein the bearing unit (1) is arranged on the soil roller (7) or on the support frame (8) by means of the bearing housing (3) and the bearing journal (2) is arranged accordingly on the support frame (8) or on the soil roller (7), and the bearing unit (1) is designed to compensate for an angular misalignment (a) between the longitudinal axes of the bearing housing (3) and the bearing journal (2).In order to create a bearing arrangement which has improved protection against external influences and environmental stresses, it is provided that the bearing unit (1) includes a sealing arrangement (16) that the sealing arrangement (16) is designed to seal a circumferential gap between bearing journal (2) and bearing housing (3), preferably at least approximately liquid-tight and/or dust-tight.