Pulley Ring Disc Venting to Prevent Debris-Induced Wear
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Solution Overview
Problem
Agricultural machines face downtime due to debris accumulation on pulley arrangements, leading to friction, overheating, and component wear, which necessitates a solution to prevent debris accumulation and ensure proper functioning.
Innovation Solution
A pulley arrangement with a protection device featuring ring discs fastened coaxially to the pulley surfaces, incorporating air flow directing means that create an air curtain to prevent debris entry, using bolts, screws, or other fasteners, and potentially welded, casted, or forged construction to guide air from the outer to the inner pulley surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pulley arrangement operates in a debris-prone environment, then the machine can perform agricultural processes, but debris accumulates on the pulley leading to friction, overheating, and component wear
Solution Approach 1:
A protective housing is introduced as an intermediary component that encloses the pulley arrangement. The housing creates a controlled environment that prevents direct contact between debris and the pulley components, thereby protecting the pulley from wear and overheating while allowing the agricultural machine to continue operating productively
2Device complexity
If the pulley arrangement is exposed to debris, then the machine structure remains simple, but friction and overheating occur leading to component damage
Solution Approach 1:
The protective housing acts as a mediator between the pulley arrangement and the external debris environment. It adds a layer of protection that isolates the pulley from harmful factors without significantly complicating the overall device structure, maintaining simplicity while effectively preventing debris-related damage
3Ease of manufacture
If debris accumulates on the pulley, then initial manufacturing costs are low, but downtime increases due to plugging and component wear
Solution Approach 1:
The protective housing is installed in advance on the pulley arrangement, creating a preventive barrier before debris accumulation can occur. This preliminary protective measure prevents future plugging and wear issues, thereby reducing unplanned downtime and maintenance interruptions despite the additional initial manufacturing step
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 air curtain effectively prevents debris accumulation, reducing friction and wear, maintaining pulley and component health, and ensuring continuous operation by minimizing downtime.
Implementation Method 1
a plurality of air flow directing means extending from an inner diameter to an outer diameter of the ring disc
Data Source
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AI summary
A pulley arrangement (38) for a belt drive (36) comprising an input shaft (40) having first end (42) and second end (44). The first end (42) of the input shaft (40) is configured to be couplable to a gear box (46). Further, A pulley arrangement (38) comprises a pulley (48) mounted coaxially on the input shaft (40) having an inner pulley surface (50) and an outer pulley surface (52). The pulley arrangement (38) further comprising a protection device (54) having at least one ring disc (56). The at least one ring disc (56) fastened coaxially to the inner pulley surface (50) or the outer pulley surface (52), wherein a plurality of air flow directing means (68) extending from an inner diameter (64) to an outer diameter (66) of the ring disc (56), and wherein a circumferential ring disc gap (60) is provided between the at least one ring disc (56) and the input shaft (40).