沥青搅拌设备振动筛用振动电机同步性能的研究

发布时间：2018-05-30 23:26

本文选题：直线振动筛 + 自同步　；参考：《长安大学》2014年硕士论文

【摘要】：随着我国工程机械的迅速发展，振动筛已被广泛地运用在筑路、煤炭、采矿、冶金、水利电力、石油化工、建筑、交通运输和铁道等各个工业部门，用来完成各种筛分作业，这对促进国民经济的发展有重要的作用。振动筛一般由振动器、隔振弹簧筛箱、筛框等部分组成。筛框在振动器的作用下，可以产生不同的运动轨迹。根据筛体运动轨迹的不同，可以将振动筛分为椭圆振动筛、圆振动筛以及直线振动筛等，其中由于双电机做振动器的直线振动筛因其结构简单、而且工作可靠被广泛应用于筛分作业中。通过对双电机直线振动筛振动的研究，得出其达到自同步的条件，以及不同步会出现的问题，这对于提高振动筛的筛分性能，提高振动筛的筛分效率和得到高质量的筛分产品都具有非常重要的现实意义。本文以双电机直线振动筛为研究对象，并对以下几个方面展开了研究工作。 1.首先对双电机振动筛的工作原理进行分析，并建立数学模型，得出当双振动电机同步运转时，振动筛在垂直于两轴连线方向近似的作直线往复振动，其次通过对双电机的运转过程进行分析得出双电机同步运转的条件，并且同步性指数越大时越容易达到同步运转。 2.在Pro/E三维建模软件中建立双电机振动筛的实体模型，经过适当的简化处理导入到仿真软件ADAMS中，通过仿真分析得出，两个完全一样的振动电机实现自同步运转，振动筛振动曲线为规律的简谐振动。当两个振动电机由于制造、安装误差导致有相位差角时，两个电机不再同步运转，导致拍振动的产生。所以应尽量选择机械特性相近的电机做振动电机。 3.通过在ANSYS中建立振动梁的柔性模型，然后导入到ADAMS中替换振动梁的刚性模型，进行仿真并将仿真结果和没替换之前进行对比得出，，振动梁在振动过程中的变形也会影响双电机的自同步。所以在振动筛工作过程中，必须保证振动梁的刚度足够，以避免其对振动筛振动的影响。
[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.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U415.522

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