Centrifugal Spreader Dosing Device Sliding Bearing
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Solution Overview
Problem
The existing centrifugal spreader designs face jamming issues due to fertilizer particles getting between the rotating dosing plates and the base plate, leading to operational inefficiencies.
Innovation Solution
The implementation of a sliding bearing system with enlarged punctiform, flattened hemispherical contact surfaces on the bearing elements attached to the lower part of the storage container, reducing the contact area and minimizing the risk of jamming by using a circular ring design with few bearing surface elements made of materials with good sliding properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slots are arranged in the dosing plate to allow fertilizer escape, then the risk of jamming is reduced, but the areas between slots remain relatively large creating continued jamming risk
Solution Approach 1:
The bearing surface is segmented into multiple small punctiform contact areas instead of large continuous surfaces. The dosing plate has multiple small bearing surfaces distributed across its bottom, replacing the conventional large flat bearing surface. This segmentation minimizes the area where fertilizer particles can accumulate while maintaining structural integrity and load-bearing capacity.
Solution Approach 2:
The bearing surfaces are designed with locally optimized properties - small punctiform contact areas with specific geometric characteristics (curved or flat bottoms) that prevent fertilizer accumulation. Each local bearing area is specifically designed to minimize jamming risk while providing adequate support, rather than using a uniform large surface throughout.
2Strength
If clamp-like guide pieces are used to hold the metering plate, then the dosing device is securely attached, but fertilizer gets between the plates causing jamming
Solution Approach 1:
Some bearing surfaces are designed with curved or hemispherical bottoms that protrude from the dosing plate. These curved surfaces create a geometry that prevents fertilizer particles from getting trapped between the dosing plate and base plate, while still providing secure attachment and load-bearing capability.
3Adaptability or versatility
If the dosing device is rotatably arranged on the reservoir, then dosing can be adjusted, but movement smoothness is reduced due to jamming
Solution Approach 1:
The bearing system is segmented into multiple small independent contact points rather than a single large contact area. This segmentation allows the dosing plate to rotate smoothly with minimal friction and no fertilizer accumulation, maintaining ease of operation while preserving dosing adjustment capability.
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 smooth movement and rotation of the dosing device, preventing fertilizer accumulation and significantly reducing the risk of jamming, thereby enhancing the operational reliability of the centrifugal spreader.
Implementation Method 1
the bearing surface elements are made of a material that has good sliding properties
Data Source
Figure 1
Figure 2~5
AI summary
The spreader has a storage container (2) including a lower part (4) tapering to form a hopper. The lower part is connected with a dosing device (5), which is arranged at the lower part in a rotatable manner around a perpendicular axis by a friction bearing. The friction bearing includes a bearing surface element that is fastened to the lower part, where the surface element downwardly carries the dosing device and arranged on a circle. The surface element is provided with a flattened, hemispherical support surface. A frictional bearing surface is arranged on the surface element.