礦物加工外文翻譯(已修改)
2024-12-22 03:29 本頁(yè)面
【正文】 規(guī)定閱讀的 外文資料原文及譯文 學(xué)院（部） ： 材料科學(xué)與工程學(xué)院 專業(yè)班級(jí)： 礦物加工工程 112 班 學(xué) 號(hào)： 2021303004 學(xué)生姓名： 王澤陽(yáng) 指導(dǎo)教師： 張東晨 教授 2021 年 05 月 27 日 指導(dǎo)教師評(píng)語(yǔ)： 評(píng)閱人： 日 期： 1 Dynamics and screening characteristics of a vibrating screen with variable elliptical trace HE Xiaomei,LIU Chusheng Abstract: the ideal motion characteristics for the vibrating screen was presented , vibrating screen with variable elliptical trace was proposed. An accurate mechanical model was constructed according to the required structural motion multidegreeoffreedom vibration theory,characteristics of the vibrating screen was parameters of the vibrating screen which motion traces were linear,circular or elliptical were stable solutions of the dynamic equations gave the motions of the vibrating screen by means of puter parameters,including amplitude,movement velocity and throwing index,of five specific points along the screen surface were gained by theoretical calculation .The results show that the traces of the new designed vibrating screen follow the ideal screening motion .The screening efficiency and processing capacity may thus be effectively improved. Keywords:variable elliptical trace。screening process with constant bed thickness。 dynamic model。motion characteristic。screening characteristics 1 Introduction Screening operations are an important part of coal processing. The vibrating screen is one of the most extensively used screening tools. Vibrating screens, such as linear vibrating screen, circular vibrating screen or elliptical vibrating screen, have a simple translational motion. The motion follows the same path everywhere on the screen and so the screen has constant transport velocity and throwing index, which leads to low screening efficiency. Augmenting the throwing index to improve breaks the exciting motors processing capacity lowers the working. In this paper , we report on the design of a new vibrating screen with variable motion traces that is based on the principle of screening process with constant bed thickness [3– 4].Different parts of the vibrating screen traverse different elliptical traces and the resulting motion agrees well with the ideal motion .Thus the screen processing School of Mechanical and Electrical Engineering,China University of Mining amp。 Technology,Xuzhou,Jiangsu 221116,China 2 capacity and efficiency can both be improved. 2 Ideal motion for a screen surface and the proposal of a vibrating screen with variable elliptical trace Screening characteristics of mon vibrating screens Vibrating screens monly work at a fixed vibration intensity .Material on the screen surface moves by throwing, rolling or sliding motions .For mon screeners ,material granularity is widely distributed at the feed end .The energy imparted to the material particles from the vibrating screen is severely dissipated .Consequently ,a large number of particles bee laminated only a short distance from the feed end .The material perates the screen within the first 1/4 to 1/2 of the screen ,which affects screening and lowers processing capacity [5].The decrease of finegrained material causes the ratio of particles close in size to ,or larger than ,the mesh to
研究報(bào)告相關(guān)推薦
鄂ICP備17016276號(hào)-1