Analysis On Dynamic Characteristics And Dynamic Balance Of Latex Centrifuge High-speed Rotor

Latex centrifuge belonged to disc separator is a typical application of high-speed vertical rotor. Latex centrifuge is one of the most used centrifuge in latex industry because of the advantages such as compact structure, small volume, high separation efficiency, high productivity and few accessory equipment. Vertical distribution structure of rotor is overhung and outboard, cooperation between barrate set and vertical shaft is on conical surface and fabrication has high accuracy. After a long time operation of latex centrifuge,barrate may be made imbalanced and vibration be brought out. Dynamic balance emendation will be made before machine leaves the factory. Barrate set balance may be disturbed and abnormal vibration failure be made after using good–balanced centrifuge for period of time because of the distortion, damage of spare part or improper machine operation. In order to prevent significant financial losses, it is necessary for centrifuge to make dynamic balance emendation regularly. The severe wear will be caused after long-term vibration and multiple regular dynamic balance emendation be required of high-speed rotating machinery. In order to achieve low-cost machine effect, we should provide a basis for dynamic balancing technology widely used and applied to manufacture of machine by analyzing dynamics and researching dynamic balance.This paper firstly gives an introduction to the rotor dynamic characteristics as well as the current research status of rotor dynamic balance. Secondly, it offers a brief overview about development history and operating principle of latex centrifuge. Then, finite element method solid model of latex centrifuge be made by presenting traditional rotor simplified modeling principles and the idea of mathematical modeling in the finite element method.Lastly, this paper gives a brief introduction to rotor critical speed solution method and the influence on critical speed made by gyroscopic effecting. Upon the modal analysis of rotor system with ANSYS software, critical speed and vibration mode of the rotor system was obtained. This paper analyzed and obtained the influence tendency on critical speed caused by structural parameters of the principal axis system, which can provide a basis for mechanism optimal design. and preliminarily analyzed the influence on rotor systemcaused by the acting force between wheel gear. The outcomes is close to the data of solid model which is reached by building up shell and beam elements centrifuge model. This paper solved the unbalance response characteristics of the unbalance influence coefficient to up and down emendation plane caused by rotor, the result of which showed that the up emendation plane,deflection is bigger than the down emendation plane. At the same time, 3types of unbalanced rotor system was simulated(static unbalance, couple unbalance,dynamic unbalance) in an unbalanced force loading form which is compiled by using APDL of ANSYS parametric design language. Certain effects are achieved by combining dynamic balance method and simulating the process of rotor system dynamic balance.After combining dynamic balance method and simulating the process of rotor system dynamic balance, the vibration caused by unbalance fell down obviously and it is feasible to some extent to using finite element software to simulate dynamic balance. Having the field balancing test, after high and low speed balance, the dynamic balance of failed machine is successful.