Rotating Shield Seal for Degradation Assembly Wear Distribution
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Solution Overview
Problem
Degradation assemblies used in processes like pavement milling experience uneven wear due to continuous engagement of a single side, leading to reduced service life, as they are subjected to high impact, heat, and abrasion.
Innovation Solution
A degradation assembly design featuring a rotating shield with a recess connected to a shank via a spring clip, incorporating a pressurized rigid element and seal to distribute wear evenly, with a lubricant chamber and protective ring to maintain lubrication and prevent debris entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-side engagement design is used, then the structure is simple, but wear is concentrated on one side reducing service life
Solution Approach 1:
The shield is designed to rotate relative to the shank, transforming a static single-side engagement into a dynamic multi-side engagement system. This rotation allows different portions of the shield to contact the formation sequentially, distributing wear across the entire shield surface and extending service life without significantly increasing structural complexity
2Device complexity
If no seal is used, then the assembly is simple, but lubricant leaks and debris enters reducing reliability
Solution Approach 1:
A seal element is introduced as an intermediary component between the stationary holder and rotating shield. This seal creates a barrier that prevents lubricant leakage and blocks debris from entering the assembly, thereby improving reliability while adding only a single intermediate component to the otherwise simple assembly structure
3Reliability
If a rotating shield with seal is used, then lubrication is maintained and debris is blocked, but the assembly complexity increases
Solution Approach 1:
The seal is implemented as a flexible ring element that can deform to accommodate the rotating shield while maintaining the sealing barrier. This flexible film approach provides effective lubricant retention and debris protection with minimal structural complexity, avoiding the need for complex mechanical sealing systems
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 extends the service life of degradation assemblies by evenly distributing wear across the assembly, reducing wear on a single side and enhancing durability through lubrication and debris protection.
Implementation Method 1
The spring clip may be formed from an elastic material and resiliently attach the shield to the shank
Implementation Method 2
The seal element may energize the rigid element against one of the components to form a slidable seal
Data Source
AI summary
In one aspect of the present invention, a degradation assembly comprises a pressing seal element and a pressurized rigid element disposed intermediate a rotating component and a stationary component. The rotating component comprising an impact tip bonded to an end opposing the stationary component. The seal element may energize the rigid element against one of the components to form a slidable seal capable of holding lubricant within the assembly and keeping debris out while still rotating.