Agricultural Combine Air Filter with Scoop and Stationary Filters
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Solution Overview
Problem
The existing rotary screen installations in agricultural combines, particularly those mounted in rectangular panels, restrict airflow to the cooling package, leading to limited airflow and inefficient cleaning.
Innovation Solution
The proposed air filter arrangement includes a rotary filter mounted on a rectangular panel with a scoop that directs airflow only through an upper inlet, and additional stationary filters positioned above the rotary filter and at the corners of the radiator to enhance airflow, ensuring effective cleaning and increased airflow to the radiator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a rotary filter is mounted in a rectangular panel to filter cooling air, then the filter can be self-cleaning and structurally integrated, but the airflow to the cooling package is restricted and insufficient
Solution Approach 1:
The filtering system is segmented into multiple independent filters (rotary filter and stationary filters) positioned at different locations. The rotary filter handles central airflow while stationary filters address corner regions, collectively providing sufficient airflow without compromising self-cleaning capability
Solution Approach 2:
The airflow path is extended vertically by positioning the scoop inlet at the upper edge and directing airflow downward through the stationary filters located at different heights and positions, utilizing the vertical dimension to increase effective airflow area
2Extent of automation
If a rotary filter is used to filter cooling air, then continuous cleaning is achieved, but foreign matter can still enter through uncovered areas
Solution Approach 1:
Multiple filtering mechanisms are merged into a unified system: the rotary filter provides continuous cleaning for central airflow while stationary filters cover peripheral and corner areas, creating comprehensive protection against foreign matter entry
Solution Approach 2:
Stationary filters act as intermediary elements that supplement the rotary filter's coverage, specifically addressing gaps in the rotational filtering path and providing additional layers of protection against foreign matter
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
This configuration ensures sufficient airflow to the radiator, effectively cleaning both the rotary and stationary filters, thereby improving the cooling efficiency and reducing the amount of foreign matter entering the engine.
Implementation Method 1
The rotary filter may be generally planar and self-cleaning
Implementation Method 2
A flow of air through said rotary filter is sufficient to clean said stationary filter. The flow of air is downward across the surface of the stationary filter.
Data Source
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AI summary
An air filter (34) arrangement for an agricultural combine located on a panel (54) at a side wall of the agricultural combine. The air filter arrangement includes a rotary filter (42) mounted for rotation at a first aperture, a scoop enclosing the rotary filter and blocking substantially all air flow to the rotary filter except at a scoop inlet (38) disposed along an upper edge of the scoop (36) above the rotary filter (42), and at least one stationary filter disposed to filter air passing through a second aperture in the panel, the stationary filter being located between an upper portion of the rotary filter (42) and the scoop inlet (38).