【正文】 3)整個(gè)振動(dòng)篩的運(yùn)動(dòng)軌跡通過計(jì)算機(jī)模擬獲得。一般來說，式（ 6）表示橢圓面在直 角坐標(biāo)系的方程。 橢圓 軌跡 振動(dòng) 篩 結(jié)合 了圓軌跡振動(dòng)篩和直線振動(dòng)篩兩者的 基本優(yōu)勢(shì) [9– 10]。振動(dòng)篩 的 入料 端有一個(gè)較大的拋擲指數(shù)和 較高 的材料 傳遞 速度 ， 這使得大部分材料迅速滲透 ,導(dǎo)致快速分層 。 增強(qiáng) 拋擲指數(shù) 來改善 激振電機(jī) 在 工作 中的較低的 處理 能力 。Processing Equipment,1998(1):42– 46. [3]Hao F Preparation Manual:Technology and :China Coal Industry Publishing House,1993. [4]Yan :China Coal Industry Publishing House,1995. [5]Liu C S,Zhao Y on nonlinear characteristics of single particle on screening amp。 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 指導(dǎo)教師： 張東晨 教授 2021 年 05 月 27 日 指導(dǎo)教師評(píng)語： 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。Processing Equipment,1999(1):45– 48 [6]Tao Y J,Luo Z F,Zhao Y research on desulfurization of fine coal using an enhanced centri fugal gravity of China University of Miningamp。 在本文中， 我們 就 一個(gè) 基于等厚篩分理論的 新的可變的 運(yùn)動(dòng)軌跡 振動(dòng)篩的設(shè)計(jì) 做報(bào)告 [3– 4]。 材料 的快速分層 增加細(xì)粒度的材料通過 篩網(wǎng) 的概率 。確切地說，橢圓軌跡的長軸決定材料的運(yùn)送速度，短軸影響材料的松散程度。 XOY 坐標(biāo)系以γ角速度逆時(shí)針旋轉(zhuǎn)從而給定一個(gè)新的坐標(biāo)系 39。篩分技術(shù)參數(shù)包括振幅， 速度和拋擲指數(shù)，由沿振動(dòng)篩表面的五個(gè)特定點(diǎn)計(jì)算。由此獲得直線、圓形或橢圓形軌跡的振動(dòng)篩的運(yùn)動(dòng)學(xué)參數(shù)線性。當(dāng) E=S， C=HS 時(shí)， D 點(diǎn)的軌跡是圓。振動(dòng)篩的大小為 m m ， 進(jìn)料粒度是 0 到 50 毫米和分類粒度是 6毫米 。常見的篩分特性如圖 1. 12 振動(dòng)篩 表面的理想 運(yùn)動(dòng) 和 實(shí)施方案 振動(dòng)篩 表面的理想運(yùn)動(dòng)描述如下 ， 根據(jù)篩選過程的 等厚篩分原則。運(yùn)動(dòng)在 振動(dòng)篩 上到處都遵循相同的路徑 ,所以 振動(dòng)篩有恒定 的運(yùn)輸速度和拋擲指數(shù) ，從而 導(dǎo)致 低的篩分效率 。 and,βthe included angle between the l and x directions. The damping force is rather small and can be neglected. Then Eq. (1) can be simplified to Eq.(2). 4 Motion and screening effect analysis of a vibrating screen with variable elliptical trace Analysis of the motion parameters Multiple degreeoffreedom vibration theory was used to find a stable solution for the forced vibration [13],as follows: 6 When E 2 S 2 +C 2 H 2 +2 ESCH=0, the trace of point D is a line. When E =Sand C =H, the trace of point D is a circle. In general. (6) expresses the equation of an xoy coordinate was rotated γ degrees anticlockwise to give a new set of x ′ oy′coordinates. A standard elliptical equation was then obtained after eliminating D D x y in Eq.(7). 7 From this we know that some points on the screen move in a line or a circle while others move in an ellipse .As long as the relative position of the rotating ce