摘要
自从美国通用振动公司设计的活化振动给煤机引入我国以来，其合理的设计及高效的生产率均获得了广泛好评，因此，国内众多生产厂家都在不断努力仿造该产品，但至目前为止都没有成功，究其原因，主要是国内相关研究部门没有掌握活化振动给煤机的技术原理，只能进行简单的外形模仿，由其造成了很多问题，如设备振动模式不合理，设备出料精度不能满足使用要求，堵煤严重，以及噪音超标等。因此，有必要在深入分析活化振动给煤机机理的基础上对我国国产活化振动给煤机进行改进，同时为我国活化振动给煤机的发展提供更加科学、合理的参考依据。本文详细地分析了振动给料机的发展过程，并针对当前活化振动给煤机存在的问题，通过理论分析和系统仿真对活化振动给煤机的运动学、动力学以及控制技术进行了系统的研究。
本文在建立双质体活化振动给煤机运动学和动力学模型的基础上，对该设备的工作原理进行了详细的分析，通过系统的计算，给出了物料作抛掷运动和正向滑动的起始条件以及物料作反向滑动的临界条件，同时还给出了物料作抛掷运动和正向滑动的理论平均速度，并利用MATLAB软件中的Simulink工具箱对振动模型进行了仿真，仿真结果验证了该动力学模型的合理性；本文还对振动系统中的激振橡胶弹簧和隔振橡胶弹簧的刚度与应力进行校核计算，并给出了橡胶弹簧直径的计算公式；最后，为了进一步提高系统给料的精度，为活化振动给煤机增加了一套称量系统，再加上可变力轮，就可以使系统实现在线无级调速。在实际生产中，启动时要求传送带先启动，再启动活化振动给煤机；而在停止时，应先停活化振动给煤机，再停传送带，按照这样的要求，利用电气控制技术设计了一个两台电动机顺序启动的控制电路，避免了物料在传送带上的堆积。 关键词：活化振动给煤机；运动学模型；动力学模型；橡胶弹簧；仿真
Since the Un—Coaler of the United States GK company was introduced into China and run so far, numerous domestic manufacturers keep copies of the production, but they have not make any Success. According to analysis, the main reason for its failure is that they don’t master the technological principles of the feeder．And simply imitation of the shape，which caused the inconsequence of the equipment vibration mode．
Abstract
Since the mechanism of Un-coaler was introduced to China since the rational design and efficient production rates received wide acclaim, many domestic manufacturers continue to strive to imitate the product, but until now have not been successful the reason for the domestic research department do not have the technical principle of activation of vibration coal feeder, only a simple shape to imitate by causing a lot of problems, such as equipment vibration mode unreasonable, can not meet the equipment out of the material accuracy use requirements, serious blocking coal, as well as excessive noise. Therefore, it is necessary to in-depth analysis on China domestic activated vibration coal feeder mechanism on the basis of activation of vibration to improve the coal feeder as well as the activation of vibration in China to provide more scientific and reasonable reference to the development of the coal machine This paper analyzes the development process of the vibrating feeder, and vibration problems in coal feeder for the current activation system on the activation of vibration through theoretical analysis and simulation of kinematics, dynamics and control technology to the coal machine study The mechanism of Un-coaler analysis and control
In this paper, the establishment of the double mass activation of the vibration to the coal machine kinematics and dynamics model based on the working principle of the device carried out a detailed analysis of the calculation of the system, given the materials for the throwing motion and forward sliding from initial conditions, as well as materials for the critical condition of the reverse sliding, but also gives the theoretical average speed of material to make a throwing motion and forward sliding, and using the Simulink toolbox in MATLAB software vibration model simulation, the simulation results verify thethe dynamic model of rationality; exciting rubber spring vibration system and vibration isolation rubber spring stiffness and stress check calculation, and gives the formula of the rubber spring diameter; Finally, in order to further improve the system tothe accuracy of the material for the activation of the vibration increased coal feeder a weighing system, coupled with the variable power wheel, you can make the system online step less speed regulation. In the actual production, startup requirements belt first start, and then start the activation of vibration coal feeder; stopped, you should first stop the activation of vibration to the coal machine, and then stop the conveyor belt, in accordance with such requirements, the use of electrical control technology designed a two sequential starting of the motor control circuit, to avoid the accumulation of material on the conveyor belt Keyword: Kinematic model; dynamic model; rubber spring
目录
第1章 绪论 ............................................. 1
1.1 课题研究背景 ..................................... 1 1.2 振动给料机的发展历程 ............................. 2 1.3 本文研究的目的及意义 ............................. 6 1.4 本文研究的主要内容 ............................... 7
1.4.1 主要研究内容 ............................... 7 1.4.2 本文的重点、难点及解决方案 ................. 7 1.5 本文的主体结构 ................................... 8 第2章 活化振动给煤系统性能分析 ......................... 9
2.1 活化振动给煤系统的组成及工作原理 ................. 9
2.1.1 活化振动给煤系统的一般组成 ................. 9 2.1.2 活化振动给煤机的工作原理 .................. 11 2.2 活化振动给煤系统运动学分析 ...................... 13
2.2.1 曲线面的位移、速度和加速度 ................ 13 2.2.2 物料抛掷运动的理论 ........................ 14 2.2.3 物料运动状态与运动参数的选择 .............. 21 2.2.4 实际输送速度的计算 ........................ 23 2.3 本章小结 ........................................ 25 第3章 给煤机动力学建模与分析 .......................... 26
3.1 建立力学模型 .................................... 26 3.2 诱导质量计算[45] ................................ 26 3.3 给煤机的动力学分析 .............................. 27
3.3.1 动力学的计算 .............................. 27 3.3.2 动力学的仿真 .............................. 31 3.3.3 仿真结果分析 .............................. 33 3.4 本章小结 ........................................ 34 第4章 给煤机弹性元件的选择与计算 ...................... 35
4.1 弹簧的共振 ...................................... 35 4.2 弹簧设计的要素 .................................. 35 4.3 弹簧的设计 ...................................... 35
4.3.1 橡胶弹簧材料的选择 ........................ 36 4.3.2 橡胶弹簧的寿命 ............................ 36 4.3.3 激振弹簧的计算 ............................ 36 4.3.4 支撑弹簧（隔振弹簧）的计算 ................ 41 4.4 橡胶弹簧直径的计算 .............................. 42 4.5 本章小结 ........................................ 42 第5章 控制系统的设计 .................................. 43
5.1 可变力轮的计算[51] .............................. 43
5.1.1 可变力轮激振力的计算 ...................... 43