Centrifugal Spreader Throwing Vane Uniform Distribution
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Solution Overview
Problem
Centrifugal spreaders often result in uneven fertilizer distribution due to the early separation of the grit jet into two partial streams before it traverses the throwing vanes, limiting uniformity and throw distance, especially for large working widths and varied fertilizers.
Innovation Solution
The outer area of the throwing vane is angled upwards relative to the inner area, with the partition wall starting outside the jet's path, allowing the fertilizer to be distributed evenly over the vane's height and achieving uniformity by delaying the separation of the jet into two partial flows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the partition wall is arranged in the rear wall starting from the inner area, then the grit jet is separated into two partial streams, but the captured grit material does not have the opportunity to be distributed over the height of the throwing vane, resulting in uneven fertilizer distribution
Solution Approach 1:
The partition wall is positioned to begin outside the area traversed by the spreading material jet, allowing the jet to first be captured by the throwing vane and distributed over the height of the vane before the partition wall divides it into partial streams. This preliminary distribution action ensures uniform fertilizer distribution while maintaining a relatively simple partition wall arrangement.
2Productivity
If the outer area of the throwing vane is angled upwards relative to the inner area, then the jet of spreading material achieves high uniformity in fertilizer distribution and large throw distance, but the partition wall must start outside the area traversed by the jet
Solution Approach 1:
The throwing vane is designed with different geometries in different areas: the inner area has a specific angle for capturing and distributing the jet, while the outer area is angled upwards to achieve large throw distance and high uniformity. The partition wall is positioned to start outside the jet-traversed area, creating local variations in structure that optimize performance while remaining manufacturable.
3Manufacturing precision
If the partition wall is positioned to allow jet distribution over the throwing vane height, then even fertilizer distribution is achieved, but material may accumulate in the throwing shovel during centrifugal transport
Solution Approach 1:
The partition wall is positioned to begin outside the area traversed by the spreading material jet, allowing the jet to be distributed over the height of the throwing vane before being divided into partial streams. This preliminary distribution ensures even fertilizer distribution. Simultaneously, the upper and lower legs and partition wall are arranged so that the distance between them does not decrease radially outward, preventing material accumulation during centrifugal transport.
Solution Approach 2:
The geometry of the throwing vane is optimized by angling the outer area upwards relative to the inner area, and the partition wall positioning is adjusted to start outside the jet-traversed area. These parameter changes ensure that the jet is distributed over the vane height for even fertilizer distribution, while the radial distance maintenance between legs and partition wall prevents material accumulation during centrifugal transport.
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 design ensures a uniform fertilizer distribution across a large area with enhanced throw distance and adaptability for different fertilizers, preventing material accumulation and simplifying the throwing vane's production with a bead-embossed partition wall.
Implementation Method 1
a centrifugal spreader has rotating centrifugal discs below the outlet openings or metering devices of a storage container with throwing blades arranged on them
Data Source
Figure 1
Figure 2~4
Figure 5~7
AI summary
The centrifugal spreader has a storage container with an adjustable outlet opening and a vertical chute adjacent to the outlet opening. A centrifugal disk rotating around an axis is provided with a winnowing fan (9), which extends over the entire radial extent of the grit beam towards the circumference of the centrifugal disk. The outer area (16) compared to the inner area (15) of the winnowing fan is bent upwards.