Bearing Seal Assembly With Vibrating Ring for Debris Removal
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Solution Overview
Problem
Existing seal assemblies for bearing configurations, particularly in agricultural applications, face challenges in effectively preventing the ingress of dirt and debris due to the prevalence of contaminants, which can lead to improper functioning of the bearing components.
Innovation Solution
A seal assembly featuring a ring and cap configuration with a spring washer that applies a preload force, promoting vibration to dislodge contaminants, and a friction-reducing coating on the ring for enhanced protection. The ring is rotationally fixed to the bearing rings through profiled portions and contact elements, generating vibrational forces to remove debris.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal assembly with rubber sealing lips is used to protect bearings from debris, then sealing protection is improved, but additional sealing protection is still needed in harsh agricultural applications with prevalent dirt and debris
Solution Approach 1:
The seal assembly is divided into multiple functional components: a ring with contact elements, a cap with retention features, and a spring washer. This segmentation allows each component to perform its specific function - the ring provides sealing contact, the cap provides structural support and debris retention, and the spring washer provides continuous contact force - collectively achieving superior protection against debris ingress in harsh agricultural environments
Solution Approach 2:
The spring washer is configured to apply a preload force to the ring, causing the seal assembly to vibrate during operation. This vibration promotes the removal of contamination or debris that may stick to the outer face of the seal assembly, thereby maintaining effective sealing protection even in environments with prevalent dirt and debris
2Reliability
If the ring is rotationally fixed to bearing rings through profiled portions and contact elements, then sealing effectiveness is improved, but vibrational forces needed to remove debris are generated
Solution Approach 1:
The first contact element on the ring engages with the second contact element on the bearing ring, and during rotation, these contact elements generate vibrational forces that are applied to the seal assembly. This vibration discharges debris from the seal assembly, preventing debris accumulation while maintaining sealing effectiveness
Solution Approach 2:
The seal assembly uses the rotational motion of the bearing rings themselves to generate the vibrational forces needed for debris removal. The contact elements between the ring and bearing rings convert the rotational motion into vibrations that automatically clean the seal assembly, eliminating the need for external cleaning mechanisms
3Productivity
If a spring washer is used to apply preload force and promote vibration, then debris removal is improved, but the spring washer is exposed to contaminants
Solution Approach 1:
The cap includes a second end extending axially inwards that partially defines a retention space for the spring washer. This retention space provides protective space for the spring washer and protects it from contaminants before they can reach and damage the spring washer, thereby maintaining its ability to generate vibrational forces for debris removal
Solution Approach 2:
The spring washer is nested within the retention space defined by the cap's second end. This nesting arrangement places the spring washer inside a protective cavity, shielding it from external contaminants while allowing it to maintain contact with the ring and generate the necessary preload force and vibrations for effective debris removal
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 seal assembly effectively prevents contamination by ensuring continuous engagement with the bearing rings, promoting the removal of debris through vibrational forces, thereby ensuring the proper functioning of the bearing components even in harsh environments.
Implementation Method 1
A spring washer can be arranged between the ring and the cap, and the spring washer can be configured to apply a preload force to the ring
Implementation Method 2
The ring can also be coated with a friction reducing coating, such as graphite or polytetrafluoroethylene (PTFE)
Data Source
AI summary
An improved seal assembly that includes an outer cap, a ring, and a spring washer. The ring is configured to repeatedly engage with a contact element defined on a bearing ring during rotation such that the ring vibrates.