摘要
卧螺过滤离心机在设计初期多采用均布橡胶减振器的减振措施。该方法往往因各减振器所受动载荷相异较大,而产生整机的二次振动。为了避免这一现象,在Ansys中采用瞬态动力学分析对减振器结构布局进行了优选,设计了一种非对称式,减振效果更佳的减振器分布方案。此外,转鼓旋转中心的高度,主轴安装轴承的间距,转鼓悬臂长度,以及转鼓壁厚是影响整机动态特性的主要参数。在Ansys中的Design opt模块下,分别采用一阶寻优法与零阶寻优法对以上设计参数进行优化,比较获得了整机动态特性最佳时的结构参数。研究结果表明,该优化可以有效改善卧螺过滤离心机工作时的动态特性以及应力分布。这对于降低动载荷危害,减少安全事故发生具有重要意义。
Horizontal worm screen centrifuge usually take vibration reduction measure of using uniformly distributed rubber damper in early design process. This method often produces secondary vibration which caused by great different dynamic load of each shock absorber. To avoid this phenomenon, the structural distribution of shock absorbers was optimally selected in Ansys by taking transient dynamic method. And an asymmetric optimized distribution scheme with better damping effect was proposed. In addition, the height of drum rotation center, the pitch of the spindle mounting bearings, the cantilever length of drum, and the thickness of drum were all the main parameters affecting the dynamic characteristic of the whole machine. In the design opt module of Ansys, respectively used first order optimization method and Approximation Method to do structure and parameter optimization of horizontal worm screen centrifuge, and obtained the best parameters of the whole machine＇ s dynamic characteristic from comparing results. The research result shows that this optimization can effectively improve the dynamic characteristic and stress distribution of horizontal worm screen centrifuge during its working condition. It has an important significance for lowering hazards of dynamic load and reducing safety incidents.
出处
《机械强度》
CAS
CSCD
北大核心
2014年第3期419-424,共6页
Journal of Mechanical Strength
基金
国家自然科学基金项目(61105071)
江苏省科技支撑计划项目(BE2012080)的资助~~
关键词
卧式螺旋过滤离心机
减振
动态特性
Ansys优化
Horizontal worm screen centrifuge
Vibration reduction
Dynamic characteristic
Ansys
Optimization
