本文選題：直線振動(dòng)篩 + 自同步　； 參考：《長(zhǎng)安大學(xué)》2014年碩士論文

【摘要】：隨著我國(guó)工程機(jī)械的迅速發(fā)展，振動(dòng)篩已被廣泛地運(yùn)用在筑路、煤炭、采礦、冶金、水利電力、石油化工、建筑、交通運(yùn)輸和鐵道等各個(gè)工業(yè)部門，用來完成各種篩分作業(yè)，這對(duì)促進(jìn)國(guó)民經(jīng)濟(jì)的發(fā)展有重要的作用。振動(dòng)篩一般由振動(dòng)器、隔振彈簧篩箱、篩框等部分組成。篩框在振動(dòng)器的作用下，可以產(chǎn)生不同的運(yùn)動(dòng)軌跡。根據(jù)篩體運(yùn)動(dòng)軌跡的不同，可以將振動(dòng)篩分為橢圓振動(dòng)篩、圓振動(dòng)篩以及直線振動(dòng)篩等，其中由于雙電機(jī)做振動(dòng)器的直線振動(dòng)篩因其結(jié)構(gòu)簡(jiǎn)單、而且工作可靠被廣泛應(yīng)用于篩分作業(yè)中。通過對(duì)雙電機(jī)直線振動(dòng)篩振動(dòng)的研究，得出其達(dá)到自同步的條件，以及不同步會(huì)出現(xiàn)的問題，這對(duì)于提高振動(dòng)篩的篩分性能，提高振動(dòng)篩的篩分效率和得到高質(zhì)量的篩分產(chǎn)品都具有非常重要的現(xiàn)實(shí)意義。 本文以雙電機(jī)直線振動(dòng)篩為研究對(duì)象，并對(duì)以下幾個(gè)方面展開了研究工作。 1.首先對(duì)雙電機(jī)振動(dòng)篩的工作原理進(jìn)行分析，并建立數(shù)學(xué)模型，得出當(dāng)雙振動(dòng)電機(jī)同步運(yùn)轉(zhuǎn)時(shí)，振動(dòng)篩在垂直于兩軸連線方向近似的作直線往復(fù)振動(dòng)，其次通過對(duì)雙電機(jī)的運(yùn)轉(zhuǎn)過程進(jìn)行分析得出雙電機(jī)同步運(yùn)轉(zhuǎn)的條件，并且同步性指數(shù)越大時(shí)越容易達(dá)到同步運(yùn)轉(zhuǎn)。 2.在Pro/E三維建模軟件中建立雙電機(jī)振動(dòng)篩的實(shí)體模型，經(jīng)過適當(dāng)?shù)暮?jiǎn)化處理導(dǎo)入到仿真軟件ADAMS中，通過仿真分析得出，兩個(gè)完全一樣的振動(dòng)電機(jī)實(shí)現(xiàn)自同步運(yùn)轉(zhuǎn)，振動(dòng)篩振動(dòng)曲線為規(guī)律的簡(jiǎn)諧振動(dòng)。當(dāng)兩個(gè)振動(dòng)電機(jī)由于制造、安裝誤差導(dǎo)致有相位差角時(shí)，兩個(gè)電機(jī)不再同步運(yùn)轉(zhuǎn)，導(dǎo)致拍振動(dòng)的產(chǎn)生。所以應(yīng)盡量選擇機(jī)械特性相近的電機(jī)做振動(dòng)電機(jī)。 3.通過在ANSYS中建立振動(dòng)梁的柔性模型，然后導(dǎo)入到ADAMS中替換振動(dòng)梁的剛性模型，進(jìn)行仿真并將仿真結(jié)果和沒替換之前進(jìn)行對(duì)比得出，，振動(dòng)梁在振動(dòng)過程中的變形也會(huì)影響雙電機(jī)的自同步。所以在振動(dòng)篩工作過程中，必須保證振動(dòng)梁的剛度足夠，以避免其對(duì)振動(dòng)篩振動(dòng)的影響。
[Abstract]:With the rapid development of construction machinery in China, vibrating screens have been widely used in road construction, coal, mining, metallurgy, water conservancy, electric power, petrochemical, construction, transportation, railway and other industrial sectors to complete various screening operations. This plays an important role in promoting the development of the national economy. Vibrating screen is generally made up of vibrator, vibration isolation spring screen box, screen frame and so on. Under the action of the vibrator, the sieve frame can produce different motion trajectories. According to the different motion trajectory of the screen body, the vibrating screen can be divided into elliptical vibrating screen, circular vibrating screen and linear vibrating screen, etc. And reliable work is widely used in screening operations. Through the study of the vibration of the double motor linear vibrating screen, the conditions for its self-synchronization and the problems arising from the non-synchronization will be obtained, which can improve the screening performance of the vibrating screen. It is of great practical significance to improve the screening efficiency of vibrating screen and to obtain high quality screening products. In this paper, the double-motor linear vibrating screen as the research object, and the following aspects of the research work. 1. Firstly, the working principle of the double motor vibrating screen is analyzed, and the mathematical model is established. When the double vibrating motor is in synchronous operation, the vibrating screen is approximately linear reciprocating in the direction perpendicular to the two axes. Secondly, through the analysis of the operation process of the double motor, the condition of the synchronous operation of the double motor is obtained, and the more synchronous index is, the easier it is to achieve the synchronous operation. 2. The solid model of double motor vibrating screen is established in Pro/E 3D modeling software, and it is introduced into the simulation software ADAMS after proper simplification. Through simulation analysis, it is concluded that two identical vibration motors realize self-synchronous operation. The vibration curve of vibrating screen is simple harmonic vibration. When the two vibrating motors have phase difference angle due to the manufacture and installation error, the two motors will no longer operate synchronously, resulting in the generation of the beat vibration. Therefore, we should try to select the mechanical characteristics of the motor similar to the vibration motor. 3. By establishing the flexible model of the vibration beam in ANSYS, then introducing it into the rigid model of replacing the vibration beam in ADAMS, the simulation results are compared with those before the replacement. The deformation of vibration beam during vibration will also affect the self-synchronization of double motors. In order to avoid the influence on vibration, the stiffness of vibrating beam must be enough in the working process of vibrating screen.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U415.522

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