Asymmetric Material Feeding Device for Crushing Mill Wear Reduction
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Solution Overview
Problem
Existing crushing mills experience abnormal wear on hammers and internal lining due to central material introduction, leading to reduced productivity, increased energy consumption, and inefficient material crushing.
Innovation Solution
A device with mobile deviation means that can modify the cross-section of the outlet aperture to selectively direct the material towards different zones of the crushing chamber, optimizing material distribution and reducing wear on hammers and lining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If material is introduced centrally with respect to the axis of rotation of the rotor, then the material can be fed uniformly to the crushing chamber, but this causes abnormal early and unpredictable wear of the hammers and shaped elements
Solution Approach 1:
The outlet aperture of the tubular conveyor is positioned asymmetrically with respect to the axis of rotation of the rotor, specifically downstream of the axis. This asymmetric positioning ensures that material is introduced at a point that does not coincide with the rotor axis, preventing direct impact on the upper portion of the hammers and eliminating the wear problem associated with central introduction
2Device complexity
If material is introduced centrally into the crushing chamber, then the introduction aperture can be centered with respect to the rotor axis, but this causes excessive material introduction that increases energy demand
Solution Approach 1:
The inlet aperture is positioned asymmetrically downstream of the rotor axis rather than centered on it. This asymmetric positioning reduces the volume of material that enters the crushing chamber simultaneously, thereby reducing the energy required to rotate the rotor while maintaining effective crushing operation
3Use of energy by stationary object
If excessive material is introduced into the crushing chamber, then the material flow is continuous, but this hinders the correct functioning of the hammers which cannot throw all material against the walls
Solution Approach 1:
By positioning the inlet aperture asymmetrically downstream of the rotor axis, the material flow is controlled to enter the crushing chamber at an optimized rate and location. This allows the hammers to effectively throw material against the chamber walls without being overwhelmed by excessive material volume, maintaining both continuous flow and high crushing efficiency
4Device complexity
If material is introduced centrally, then the feed structure can be simplified, but this results in non-uniform and unpredictable productivity over time
Solution Approach 1:
The asymmetric positioning of the inlet aperture downstream of the rotor axis creates a more consistent material distribution pattern throughout the crushing chamber. This eliminates the productivity variations and unpredictability associated with central material introduction, resulting in steady and reliable crushing performance over time
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 solution reduces wear on hammers and internal lining, increases the hourly productivity of the crushing mill, and decreases the energy required for operation, resulting in more consistent and efficient material processing.
Implementation Method 1
deviation means mobile with respect to the external body, associated with the latter and configured to selectively modify the cross-section of the outlet aperture
Data Source
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AI summary
Device (10) for introducing incoherent material into a machine for processing incoherent material comprising an external body (11) which is configured to be passed through by an incoherent material (M) and which defines inside it a passage channel (15) having an inlet aperture (13) and an outlet aperture (14). The device (10) also comprises mobile deviation means (19) pivoted to the external body (11) and configured to selectively modify the cross-section (S) of the outlet aperture (14).