Track Roller Collar Oil Void for Face Seal Lubrication
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Solution Overview
Problem
Existing track roller sealing strategies face performance degradation and failure due to high speeds of rotating face seal components, and existing designs can complicate engineering and design of other parts, particularly in heavy-duty off-highway machinery.
Innovation Solution
A track roller design featuring a collar with an oil void arranged axially between its center body ends, fluidly connected to a clearance around the roller shaft, which includes a seal carrier and face seal assembly, providing additional lubrication and heat dissipation through an oil groove and oil-deflection protrusions to enhance seal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If face seals are used to provide a rotating but fluidly sealed interface between track rollers and roller shaft, then sealing performance is improved, but the high speeds of rotating face seal components lead to performance degradation and failure
Solution Approach 1:
The patent applies local quality by creating a specific lubrication zone (oil void) at the critical sealing interface. The oil void is positioned locally between the face seal assembly and collar to provide enhanced lubrication exactly where the high-speed rotation causes wear, without requiring changes to the entire seal system or reducing operational speed.
Solution Approach 2:
The patent uses hydraulic principles by introducing oil into a void space to create fluid pressure that provides lubrication and cooling at the face seal interface. The oil void acts as a hydraulic cushion that reduces friction and heat generation during high-speed rotation, extending seal life without compromising sealing effectiveness.
2Reliability
If existing sealing strategies are implemented, then sealing function is achieved, but the engineering and design of other parts becomes complicated
Solution Approach 1:
The patent merges the sealing function with the existing collar structure by integrating the oil void directly into the collar design. This combination eliminates the need for separate, complex sealing assemblies and their associated mounting hardware, simplifying the overall engineering while maintaining effective sealing through the lubricated face seal interface.
Solution Approach 2:
The collar is designed with multi-functionality by incorporating both the structural support function and the lubrication delivery function through the integrated oil void. This universal design approach allows the same component to perform multiple functions (structural support, oil containment, and lubrication delivery) without requiring additional specialized parts, thereby reducing design complexity.
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 design improves seal performance by providing additional lubrication and heat dissipation, reducing the risk of seal failure and extending the service life of track rollers in harsh off-highway environments.
Implementation Method 1
providing additional lubrication and heat dissipation
Implementation Method 2
providing additional lubrication and heat dissipation
Data Source
AI summary
A track roller includes a roller shell, a roller shaft extending through the roller shell, and a collar. The collar includes a center body interference-fitted upon the roller shaft, and a seal carrier. A clearance extends radially between a center body outer surface and a face seal assembly held in axial compression between the seal carrier and the roller shell. An oil void is formed in the center body and fluidly connected to the clearance to provide an increased oil volume for lubrication and heat-dissipation.