【摘要】：本課題來(lái)源于企業(yè)，是國(guó)家重點(diǎn)新產(chǎn)品試制計(jì)劃項(xiàng)目的子項(xiàng)目，項(xiàng)目編號(hào)為2008GRC10163，項(xiàng)目目的是對(duì)一種新型的弧形振動(dòng)篩進(jìn)行研究，研究弧形振動(dòng)篩的主要參數(shù)對(duì)篩體運(yùn)動(dòng)狀態(tài)的影響，確定弧形振動(dòng)篩的主要參數(shù)組合，并對(duì)弧形振動(dòng)篩的結(jié)構(gòu)進(jìn)行動(dòng)態(tài)分析，以優(yōu)化弧形振動(dòng)篩結(jié)構(gòu)，提高產(chǎn)品性能，提高篩分效率。 本文的主要研究?jī)?nèi)容及結(jié)論體現(xiàn)在以下幾方面： 首先，分析了物料在弧形篩面上的受力狀態(tài)，建立了物料在篩面上動(dòng)力學(xué)方程；分析弧形振動(dòng)篩篩分系統(tǒng)的性能指標(biāo)：拋擲指數(shù)和跳躍指數(shù)，及其相互關(guān)系；分析弧形篩面的形狀結(jié)構(gòu)對(duì)透篩效率的影響，設(shè)計(jì)了弧形振動(dòng)篩的篩面布置圖。其次，分析了弧形振動(dòng)篩的動(dòng)力學(xué)模型，從理論上建立了弧形振動(dòng)篩的動(dòng)力學(xué)方程， 為弧形振動(dòng)篩的理論研究提供依據(jù)；運(yùn)用軟件仿真研究了弧形振動(dòng)篩的激振力大小、激振力方向、支撐彈簧剛度和支撐彈簧夾角四個(gè)主要參數(shù)對(duì)弧形振動(dòng)篩運(yùn)動(dòng)狀態(tài)的影響。得出結(jié)論：激振力越大，物料透篩力越大；激振力的方向變化影響弧形振動(dòng)篩質(zhì)心速度和加速度的大�。恢螐椈蓜偠群椭螐椈蓨A角影響弧形振動(dòng)篩質(zhì)心的速度和加速度的大小，并且影響其運(yùn)動(dòng)周期，合理選擇支撐彈簧剛度和支撐彈簧夾角，能有效提高弧形振動(dòng)篩的篩分效率。然后，運(yùn)用實(shí)體有限元仿真技術(shù)，通過(guò)正交實(shí)驗(yàn)法設(shè)計(jì)仿真計(jì)算方案，通過(guò)觀察弧形振動(dòng)篩篩體質(zhì)心的運(yùn)動(dòng)軌跡，，得到當(dāng)激振力為38kN，激振力與水平面夾角成20度角， 支撐彈簧剛度為18.67kg/mm，支撐彈簧夾角成60度，此時(shí)，弧形振動(dòng)篩的工作效率最好，可以更充分地利用激振力的功率，使振動(dòng)篩的篩分效果更優(yōu)。振動(dòng)篩的四個(gè)主要參數(shù)的變化，均影響振動(dòng)篩的運(yùn)動(dòng)狀態(tài)，進(jìn)一步研究單個(gè)參數(shù)對(duì)篩分效率的影響，為確定弧形振動(dòng)篩的主要參數(shù)提供可靠依據(jù)。采用優(yōu)化后的參數(shù)組合對(duì)實(shí)際振動(dòng)篩進(jìn)行改進(jìn)，振動(dòng)篩的處理能力提高了21%。最后，根據(jù)實(shí)際的弧形振動(dòng)篩結(jié)構(gòu)，運(yùn)用有限元分析計(jì)算了弧形振動(dòng)篩的篩體及其零部件的各階固有頻率和振型，分析其振動(dòng)特性，并且對(duì)弧形振動(dòng)篩的結(jié)構(gòu)進(jìn)行了動(dòng)態(tài) 設(shè)計(jì)。
[Abstract]:This subject originates from the enterprise and is a sub-project of the national key new product trial plan. The project number is 2008 GRC10163. The purpose of the project is to study a new type of arc vibrating screen, study the influence of the main parameters of the arc vibrating screen on the motion state of the screen, determine the main parameters combination of the arc vibrating screen, and study the arc vibrating screen. The structure of the sieve is dynamically analyzed to optimize the structure of the arc vibrating screen, improve the product performance and improve the screening efficiency.
The main contents and conclusions of this paper are as follows:
Firstly, the force state of the material on the curved screen surface is analyzed, and the dynamic equation of the material on the screen surface is established; the performance indexes of the screening system of the curved vibrating screen, such as throwing index and jumping index, and their relationship are analyzed; the influence of the shape and structure of the curved screen surface on the screening efficiency is analyzed; and the screen layout of the curved vibrating screen is designed. Secondly, the dynamic model of the arc vibrating screen is analyzed, and the dynamic equation of the arc vibrating screen is established theoretically.
It provides the basis for the theoretical research of the arc vibrating screen, and studies the influence of four main parameters of the arc vibrating screen: the magnitude of the exciting force, the direction of the exciting force, the stiffness of the supporting spring and the angle between the supporting spring. The centroid velocity and acceleration of the arc vibrating screen are influenced by the stiffness of the supporting spring and the angle between the supporting spring, which affect the centroid velocity and acceleration of the arc vibrating screen, and affect its movement period. Rational selection of the stiffness of the supporting spring and the angle between the supporting spring can effectively improve the screening efficiency of the arc vibrating screen. Body finite element simulation technology, through the orthogonal experimental design of simulation calculation program, by observing the body center of the arc shaker trajectory, get when the exciting force is 38 kN, the exciting force and the horizontal plane angle is 20 degrees.
The stiffness of the supporting spring is 18.67 kg/mm and the angle between the supporting springs is 60 degrees. At this time, the working efficiency of the arc-shaped vibrating screen is the best, and the power of the exciting force can be fully utilized, so that the screening effect of the vibrating screen is better. Finally, according to the actual structure of the arc vibrating screen, the natural frequencies of the screen body and its components are calculated by finite element analysis. The vibration characteristics of the vibrating screen are analyzed, and the structure of the vibrating screen is dynamically analyzed.
Design.
【學(xué)位授予單位】：江南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH237.6

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本文編號(hào)：2201317