Crushing Plant Pre-Screening Vibration Control
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Solution Overview
Problem
Crushing plants face inefficiency due to high fines content in filling materials, which are not completely screened out and strain the crushing unit, reducing its efficiency.
Innovation Solution
A processing plant design with an additional screen driven by a vibration exciter positioned before the screening unit, along with a control device to manage the vibration drive and exciter separately, increasing the total screen area and dwell time of material, and allowing for different excitations to optimize screening based on filling materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If material with high fines content is fed to the crushing unit, then the processing plant can handle a wide variety of filling materials, but the crushing unit becomes burdened and its efficiency is reduced
Solution Approach 1:
An additional screen is positioned before the screening unit to perform preliminary screening of fines from the filling material. This preliminary action removes problematic fines before the material reaches the crushing unit, allowing the plant to handle diverse materials while protecting the crushing unit from excessive fines that would reduce its efficiency.
Solution Approach 2:
The screening process is segmented into multiple stages: an additional screen for preliminary fines removal, followed by the main screening unit. This segmentation allows different parts of the system to handle different aspects of material processing, with the additional screen specifically targeting fines to protect the crushing unit.
2Manufacturing precision
If the screening area is increased by adding another screen, then the screening effectiveness is improved, but the device complexity increases
Solution Approach 1:
The additional screen is integrated with the existing screening unit structure and can be driven by the same vibration drive. This merging approach increases the total screening area and effectiveness while avoiding the need for completely separate, independently driven screening systems, thus limiting the increase in device complexity.
3Adaptability or versatility
If different excitation levels are applied to the pre-screen and screening unit, then the screening process is optimized for various materials, but the control complexity increases
Solution Approach 1:
The system is designed to allow dynamic adjustment of excitation levels for the additional screen and screening unit independently. This enables optimization of screening performance for different filling materials by adjusting vibration parameters, while the control complexity is managed through coordinated control of the two vibration drives.
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 significantly enhances the screening process, reducing the load on downstream units by increasing the screening effectiveness and allowing for optimal adaptation to various filling materials, thereby improving the overall efficiency of the crushing process.
Implementation Method 1
a further sieve (24) which can be set into oscillating motion by means of a vibration exciter (25)
Implementation Method 2
the pre-screen (32) can be set into oscillating motion by means of a vibration drive (38)
Data Source
Figure 1
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AI summary
The invention relates to a processing plant, in particular a crushing plant, with a filling unit (20) which can be filled with material to be crushed, wherein a screening unit (30) with a pre-screen (32) is arranged behind or in the filling unit (20) in the conveying direction, wherein the pre-screen (32) can be set into oscillating motion by means of a vibration drive (38), and wherein a part of the supplied material is conveyed via the screening unit (30) to a subsequent process unit, in particular a crushing unit, and a further part is screened out in the screening unit (30).To reduce the load on the process unit, it is provided according to the invention that a further sieve (24) is arranged in the conveying direction upstream of the sieve unit (30), which is driven by a vibration exciter (25), and that a control device is provided by means of which the vibration drive (38) and the vibration exciter (25) are controlled separately from each other.