Roller Wiper Drum Cleaning Device for Asphalt Compactors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Asphalt compactor drum wipers made of flexible materials like polyurethane wear out quickly due to sliding friction, requiring frequent replacements and leading to inconsistent cleaning performance.
Innovation Solution
A drum surface cleaning device with a roller wiper system supported by pivotable arms and elastic members, such as torsion springs, which maintains constant contact force through adjustable tension, reducing wear and extending lifespan by distributing friction uniformly across the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flexible material wiper is used to clean the drum surface, then the wiper can conform to the drum surface and provide cleaning, but the wiper wears out quickly due to sliding friction
Solution Approach 1:
The invention inverts the cleaning mechanism from sliding friction to rolling friction. Instead of a flat wiper blade sliding across the drum surface, a cylindrical roller wiper is used that rotates as it contacts the drum, converting the harmful sliding friction into beneficial rolling friction. This dramatically reduces wear on the wiper material while maintaining effective cleaning contact with the drum surface.
Solution Approach 2:
The invention applies curvature by using a cylindrical roller wiper instead of a flat blade. The curved surface of the roller wiper matches the curvature of the drum surface, allowing for uniform contact and distribution of cleaning force. The cylindrical shape enables the wiper to conform to the drum's curvature while rotating, which reduces stress concentration and wear at any single point.
2Reliability
If a spring-loaded wiper is used to maintain contact with the drum surface, then cleaning coverage is maintained, but the wiper performance becomes inconsistent as it wears
Solution Approach 1:
The invention inverts the cleaning mechanism from sliding friction to rolling friction. Instead of a flat wiper blade sliding across the drum surface, a cylindrical roller wiper is used that rotates as it contacts the drum, converting the harmful sliding friction into beneficial rolling friction. This dramatically reduces wear on the wiper material while maintaining effective cleaning contact with the drum surface.
Solution Approach 2:
The invention makes the wiper system dynamic by allowing the roller to rotate and the supporting arms to pivot. The roller rotates at a speed related to the drum rotation, creating a dynamic cleaning action that adapts to drum surface variations. The pivotable supporting arms with elastic members allow the roller position to adjust dynamically, maintaining optimal contact pressure throughout the wiper's service life even as wear occurs.
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 roller wiper system significantly increases lifespan by evenly distributing friction and maintaining constant contact force, ensuring effective cleaning throughout its use, reducing the need for frequent replacements and improving job site finish quality.
Implementation Method 1
a first elastic member engaged between said first bracket and said first supporting arm and elastically pressing said roller wiper against the surface of said drum
Implementation Method 2
the roller wiper is worn at a much lower rate from rolling friction, which substantially increases its lifespan
Data Source
AI summary
A device for cleaning a drum surface of an asphalt compactor. The device has a first and a second brackets fixed to a body of the compactor, a first supporting arm pivotably connected to the first bracket, a second supporting arm pivotably connected to the second bracket, a roller shaft supported by the supporting arms and is parallel to the rotation axis of the drum, a roller wiper mounted to the roller shaft and is extending along the width of the drum, contacting the surface of the drum. The device further has elastic members engaged between the brackets and the supporting arms. These elastic members are pressing the roller wiper against the surface of the drum. The roller wiper of the device has an enhanced lifespan.