Vibrating Screen Dynamic Load Optimization
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Solution Overview
Problem
Vibrating screens face issues with excessive screen surface dynamic load, leading to accelerated corrosion, reduced service life, and decreased screening efficiency due to inadequate consideration of dynamic load in optimization processes.
Innovation Solution
An optimization method for screen surface dynamic load involves selecting design variables, establishing an experimental matrix, performing response surface experiments, and using double-objective optimization models to reduce dynamic load while maintaining high screening efficiency, employing techniques like NSGA-II for Pareto solution sets and calculating optimization spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If screen surface dynamic load is reduced through optimization, then service life of screen surface is prolonged, but screening efficiency may be compromised
Solution Approach 1:
The patent applies parameter changes by systematically varying excitation parameters (amplitude, frequency, vibration direction angle) and structural parameters (screen surface inclination angle, screen mesh shape) to find optimal combinations that simultaneously reduce screen surface dynamic load and maintain high screening efficiency. This is achieved through response surface methodology and multi-objective optimization to determine the best parameter settings.
Solution Approach 2:
The patent employs dynamics by introducing a dynamic load reduction factor that accounts for the dynamic characteristics of the screen surface under operating conditions. The optimization model dynamically adjusts parameters to minimize the dynamic load on the screen surface while maintaining screening performance, rather than using static design approaches.
2Strength
If auxiliary beam is added to improve structural performance, then stress and strain concentration on screen surface is alleviated, but impact corrosion on screen surface and forces on screen box and vibration isolation system cannot be reduced
Solution Approach 1:
The patent extracts the problematic auxiliary beam structure from the design and instead focuses on optimizing the excitation parameters and screen surface characteristics. By removing the auxiliary beam and adjusting operational parameters, the patent achieves stress reduction without the negative side effects of increased impact corrosion and forces on supporting structures.
Solution Approach 2:
The patent replaces the mechanical reinforcement approach (adding auxiliary beams) with a parametric optimization approach. Instead of adding structural elements, the patent substitutes mechanical design with optimization of operational parameters (amplitude, frequency, inclination angle) to achieve the same stress reduction effect without the harmful side effects.
3Productivity
If conventional optimization methods are used to improve screening efficiency, then screening efficiency is improved, but screen surface dynamic load is not reduced and may even be increased
Solution Approach 1:
The patent introduces dynamic load as a key consideration in the optimization process by incorporating the dynamic load reduction factor. This transforms the optimization from a static efficiency-focused approach to a dynamic multi-objective approach that simultaneously considers screening efficiency and dynamic load reduction, preventing the increase of dynamic load that occurs in conventional methods.
Solution Approach 2:
The patent implements feedback by using response surface methodology to establish relationships between excitation parameters and both screening efficiency and dynamic load. The optimization process uses this feedback information to iteratively adjust parameters, ensuring that efficiency improvements do not come at the cost of increased dynamic load.
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 method reduces screen surface dynamic load, prolongs the service life of vibrating screens, and enhances the effective screening area by configuring process parameters for high efficiency and low dynamic load.
Implementation Method 1
An upper rotating heavy hammer of a vibrator causes a screen surface to generate a plane whirling vibration, while a lower rotating heavy hammer causes the screen surface to generate a conical surface whirling vibration
Implementation Method 2
A vibrating screen works by using a reciprocating rotary vibration generated by vibrator excitation
Data Source
AI summary
The present invention discloses an optimization method for a screen surface dynamic load of a vibrating screen. The method includes the following steps: step 1. selecting design variables, and establishing an experimental matrix; step 2. performing a response curved surface experiment; step 3. establishing two double-objective optimization models and solving the same to obtain two groups of Pareto solution sets, wherein the solution sets respectively represent screening efficiency optimization paths of the vibrating screen under the conditions of a high screen surface dynamic load and a low screen surface dynamic load; and step 4. calculating an optimization space for a screen surface dynamic load under a high screening efficiency. According to the method of the present invention, the screen surface dynamic load can be directly reduced, and the service life of the screen surface and the whole vibrating screen is prolonged.