Vibrator Suspension for Pressure Filter Stability
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Solution Overview
Problem
Existing vibration fine screens in the paper industry face issues with critical speeds, non-symmetric force application, and uncontrolled secondary oscillations due to imbalanced mass distribution and compressibility of liquids, leading to equipment destruction and variable operating behavior.
Innovation Solution
The suspension of the cylindrical vibrator is modified to allow both horizontal and vertical mobility using cylindrical rubber buffers or rubber-buffered Cardan-type members, enabling effective compensation of non-symmetric loads and improving force transmission through a tangential liquid flow and spiral path design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the vibrator is suspended using rigid bar-shaped spring members or Cardan joints to maintain horizontal circular motion, then the guiding precision is improved, but the mass distribution imbalance causes non-symmetric force application and critical speed problems
Solution Approach 1:
The suspension system is transformed from rigid (bars, Cardan joints) to flexible (rubber buffers), allowing dynamic adaptation to mass distribution imbalances and non-symmetric forces while maintaining guiding function
Solution Approach 2:
The suspension characteristics are changed by using rubber buffers with specific viscoelastic properties, modifying the stiffness and damping parameters to absorb non-symmetric loads and prevent critical speed oscillations
2Productivity
If the vibrator operates at high speeds to improve productivity, then the separation efficiency is improved, but non-symmetric forces and compressibility effects cause uncontrolled secondary oscillations and equipment destruction
Solution Approach 1:
Rubber buffers are installed in advance in the suspension system to cushion and absorb non-symmetric forces and compressibility effects before they can cause uncontrolled oscillations or equipment damage during high-speed operation
Solution Approach 2:
The rubber buffers act as intermediary elements between the vibrator and housing, mediating the transmission of forces and preventing direct transmission of harmful non-symmetric loads and oscillations to the equipment structure
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 reduces lateral forces and enhances the stability and control of the fine screen, preventing equipment destruction and ensuring consistent operation by absorbing non-symmetric loads and maintaining symmetric force application, even at high speeds.
Implementation Method 1
cylindrical rubber buffers or rubber-buffered Cardan-type members
Implementation Method 2
absorbing non-symmetric loads
Implementation Method 3
the liquid to be treated is subjected to a continuously changing, i.e. oscillating, positive or negative-pressure by a rotor in a housing
Implementation Method 4
the oscillating, positive or negative-pressure by a rotor
Implementation Method 5
cylindrical rubber buffers or rubber-buffered Cardan-type members
Data Source
AI summary
The device according to the invention serves for classifying or concentrating liquids laden with fibers or solids by means of screening or filtration. For this purpose, a cylindrical fine screen is arranged in a vertical position in a housing comprising an axially cylindrical vibrator being somewhat smaller than the fine screen so as to produce an annular gap between the screen and the vibrator. In the vibrator, there is a vibration motor with imbalances, which generates circular horizontal oscillations. The liquid to be treated is introduced into the annular gap, primarily from above, and the concentrated liquid is removed at the bottom. The cleaned liquid is discharged between the screen and the wall of the housing. The feature of the invention is that the vibrator is mounted on at least three rubber elements which primarily allow the vibrator to perform a circular horizontal movement. However, by allowing the vibrator to move away vertically, these rubber elements also compensate for occurring vertical forces caused by unsymmetrical loads on the screen.