MG400-930-AWD型交流电牵引采煤机牵引部设计
收藏
资源目录
压缩包内文档预览：
编号：127740682
类型：共享资源
大小：1.71MB
格式：ZIP
上传时间：2021-05-15
上传人：好资料QQ****51605
认证信息
个人认证
孙**（实名认证）
江苏
IP属地：江苏
45
积分
- 关 键 词：
-
MG400
930
AWD
交流电
牵引
采煤
设计
- 资源描述：
-
喜欢这套资料就充值下载吧。。。资源目录里展示的都可在线预览哦。。。下载后都有，，请放心下载，，文件全都包含在内，，【有疑问咨询QQ:414951605 或 1304139763】
- 内容简介：
-
a 英文原文Harmonic Response Analysis On Cutting Part of Shearer Physical Simulation System Paper TitleAbstractCoal-rock interface recognition system mainly meanscollecting various response signals available from multi-sensorsequipped in shearer and further analyzing and those response signals to see if it is cutting coal or rock. For this purpose, the shearer equips total five types of various distinguishing sensors to pick up these signals. Both the optimized configuration of sensors measuring points and the choices of the sensors properties are the key factors to correctly and completely collecting the manifold dynamic characteristic signals of cutting part of physicalsimulation system. Therefore, it is important and necessary to carry out the harmonic response dynamics analysis of shearer cutting part. The vibration characteristics based on frequencyresponse is analyzed. The study not only optimizes the dispositionof the vibration sensor for the maximum output amplitude signals, but also identifies the frequency range of the vibration sensor, so that it not only satisfies the condition for undistorted measurements, but also avoids that the sensors are interfered due to resonance.Keywords cutting part finite element dynamicsharmonic response coal-rock interface recognitionI. INTRODUCTIONCoal-rock interface recognition system mainly collects response signals of cutting force of shearer by multi-sensor and analyses this response signal for the recognition of cutting coal or rock. Therefore, it is basic premise to pick up signals. Generally there are two methods to pick up these signals: one is to collect data at the coal interface, which, however, brings a lot of difficulties as a result, and is limited to certain extent by many factors. Another method is, under meeting the similarity condition, to establish physical simulation system in thelaboratory, including media and the simulation ofshearer traction-cutting mechanism. This way can adjust structural parameters, mechanical and physical performance parameters of coal or rock in large range; meanwhile, this way can strictly control the test parameters, optimize test methods to obtain the accurate and reliable results. So the physical simulation system of shearer is developed on the foundation of similarity principle.With the states of cutting different materials, arm vibrationstate, pressure in the raising cylinder, torque signal of inputshaft, torsional vibration signal of drum shaft and cutting electrical current accordingly reflect changes in the state of cutting. So the five types of sensors to pick up these signals are equipped with. In recent years ,the researches of coalrock interface recognition are mostly focused on fusion research1-3, unfortunately, little concerns about the validity and correctness of the data itself is given, which involves the disposition optimization of sensors measuring points and the choice of the sensor performances. In view of this, the vibration states of arm will be analyzed and summarized up in this paper. So the cutting part of shearer physical simulation system for finite element harmonic analysis is made, the vibration response characteristics of cutting part from theperspective of frequency response is analyzed to obtain the best point of picking-up vibration of arm, optimize the disposition of the vibration sensor measuring point and determine the due working frequency range of sensor.II. PHYSICAL SIMULATION SYSTEM OF SHEARERThe testing model of shearer is based on the prototype of electric traction shearer (model: MGTY400/900-3.3D) according to the similarity theory, and is designed by the geometric ratio of one to eight. Based on the foundation of this, it is optimized and remodeled to highlight the simples of model and meet the performance, low cost, simple structure. The physical simulation system of shearer4 is shown as figure1.Shearer model is composed of drum, arm, torsional moment sensor, motor, cylinder and body. The cutting part of model needs to complete two actions: the motor as power input mechanism drives the drum to finish cutting; and the height of arm is adjusted successively by the cylinder from thetop position(angle is =48.96) to the bottom position (angle is=26.69) . The position is shown as figure 2.III. HARMONIC RESPONSE AT LEVEL POSITIONHarmonic response analysis is a method used to determine the steady-state response of a linear structure to loads that varysinusoidally (harmonically) with time. The input is the harmonic load for the known size and frequency. The idea is to calculate the structures response at several frequencies and obtain a curve graph of some response quantity versus frequency5.A. Establishment of three-dimensional modelWhen we ensure the original structure size, the quality of structure, simplify these parts what are not the focus of the study, A model of cutting part is established by threedimensional modeling software Pro/E. The main parts sizes are drum diameter 225 mm, arm length 490 mm, height 150mm, width 154 mm, width 735 mm and so on.B. Definition of element type and material propertiesAfter completion in three-dimensional modeling, model is imported ANSYS11.0 finite element analysis software. Based on the structure of shearer, the type of solid element solid92 is selected. This element type is suitable for meshing of the irregular grid of model established by a variety of CAD / CAM. Element is defined by 10 nodes, and is the quadratictetrahedron element of pure displacement shape function. Second , the laboratory model of shearer is steel material, so material property is defined isotropic materials, elastic modulus is 206 Gpa, Poissons ratio is 0.3,density is 7800 kg / m 3 .As tetrahedron element types is selected, mesh is a free meshing. Meshes density meet the requirements of optimization of sensor location. the meshed model as shown in Figure 3 ,from top to bottom for the Y direction ,and up is positive; The horizontal direction for the X direction , the right is positive; forward and afterward for the Z direction ,forward is positive .the local distribution of nodes shown in Figure 4.C. Boundary conditions and Apply loadsBecause the stand plate of laboratory shearer hinges onthe fuselage, while the model is built to remove the fuselage the displacement constraints of all degrees of freedom are imposed on the hinged earrings. In working process of shearer cutting one coal level, the rocker arm position is fixed by the cylinder, it is equivalent to the all degrees of freedom constraints imposed hinged earrings for a cutting height ofshearer.In the harmonic response analysis, loads applied is harmonic load as F= Focoswt. There are two ways to apply load: one is real-imaginary part, the other is amplitude-phase6, in this paper, real-imaginary part is selected. The peak of load excitation force is Fo=300N, and its frequency range is generally 0 to 500 Hz, this is selected based on the testing datafrom the laboratory. The points of applying load are selected in the front face parallel to drum axis, five points are applied load in downward direction, as shown in figure 3.D. Results of harmonic analysisThe purpose which the cutting part for harmonic analysis is made is to obtain its frequency response state, to test the transmission characteristic of mechanism for excitation force, to study vibration displacement in each frequency, and to acquire natural frequency and band in distortion measuring condition.Nodes 1157，20060，20044，3388，583 are selected to be investigated. The frequency-displacement curve of vibration in Y direction is shown in figure 5, it is drawn from the figure that the largest vibration displacement is of node 1157, the vibration form of the other nodes is similar to the node 1157. The resonant frequency of node 1157 appears inthe 38Hz, 278Hz, and 324Hz. The distorted frequency range is nearly 38Hz to 278Hz. By analyzing the displacement of each frequency corresponding to the three nodes, the displacement of node 1157 is generally larger than other two nodes. It shows that the region of nodes 1157 possesses excellentamplification for the excitation signal, and maintains good transmission characteristics of the excitation force. It is drawn from the figure 6 that the largest vibrationdisplacement is of node 1157 when it vibrates in Z direction. The resonant frequency of node 1157 appears in the 38Hz, 98Hz, 202Hz, 250Hz, 276Hz, and 324Hz. By the analysis above, the distorted frequency range is nearly 96Hz to 202Hz. In these three nodes, by analyzing the displacement of eachfrequency, node 1157 also possesses larger displacement than other two nodes, excellent amplification for the excitation signal, and maintains good transmission characteristics of the excitation force.IV. HARMONIC RESPONSE ANALYSIS AT TOP POSITIONA. Preprocess model and solution The cutting part at top position for harmonic analysis is done when load is changed but other conditions. Loads are decomposed into X and Y axis respectively, it is equivalent to vertical downward load imposed on drum at top position. The equivalent load force is 300N, and is decomposed into Y axis as 196.96N, the downward of Y direction is negative based on model coordinate system, into X axis as 226.29N, the right of X direction is positive based on model coordinate system. Load is applied on model shown in figure 7.B. Results of harmonic response and analysis Nodes 1157 ， 20060 ，20044 are still selected to be investigated, the frequency-displacement curve of vibration in Y direction as shown in figure 8, it is drawn from the figure that the largest vibration displacement is of node 1157, the vibration form of the other nodes is similar to the node 1157. The resonant frequency of nodes 1157 ，20060 ， 20044 appears in the 38Hz, 278Hz, and 324Hz. The distorted frequency range is nearly 38Hz to 278Hz. It is shown in figure 8 that the cutting part of shearer at top position only appears third-order resonance, and the displacement of low-frequency resonance is the largest. So the cutting part of shearer mainly avoids noises signals of low-frequency, particularly in the three resonant frequencies. By analyzing the displacement of each frequency corresponding to the three nodes, it is shown that the region of nodes 1157 possesses excellent amplification for the excitation signal, and maintains good transmission characteristics of the excitation force as the level position. It is drawn from the figure 9 that the largest vibration displacement is of node 583 when it vibrates in Z direction at top position. The resonant frequency of node 1157 appears in the 38Hz, 98Hz, 202Hz, 250Hz, 278Hz, 324Hz and 424Hz. By the analysis above, the distorted frequency range is nearly 98Hz to 202Hz. For vibration in Z direction at top position,node 1157 possesses larger displacement than other two nodes except individual frequency. So with regard to vibration in Z direction at top position, node 1157 can still be selected to be the picking-up point for good transmission characteristics.V. HARMONIC RESPONSE ANALYSIS AT BOTTOM POSITIONA .Preprocess model and solutionThe cutting part at bottom position for harmonic analysis is still done when load is changed but other conditions. Loads are also decomposed into X and Y axis respectively, it is equivalent to vertical downward load imposed on drum at top position. The equivalent load force is 300N, and is decomposed into Y axis as -148.59N, the downward of Y direction is negative based on model coordinate system, into X axis as -260.62N, the left of X direction is negative based on model coordinate system. Load is applied on model shown in figure 10.B. Results of harmonic response and analysisNodes 1157 , 20060 ,20044 are still selected to be investigated, the frequency-displacement curve of vibration in Y direction as shown in figure 11, it is drawn from the figure that the largest vibration displacement is of node 1157, the displacement value is 1.11cm, the vibration form of the other nodes is similar to the node 1157. The resonant frequency of nodes 1157,20060,20044 appears in the 38Hz, 278Hz, and324Hz. The distorted frequency range is nearly 38Hz to 278Hz. It is shown in figure 11 that the cutting part of shearer imposed sinusoidal excitation force at bottom position only appears third-order resonance, and the displacement of lowfrequency resonance is the largest. So the cutting part of shearer mainly avoids noises signals of low-frequency,particularly in the three resonant frequencies. It is drawn from the figure 12 that the largest vibration displacement is of node 583 when it vibrates in Z direction at bottom position. The resonant frequency of node 1157 appears in the 40Hz, 98Hz, 202Hz, 250Hz, 276Hz, 324Hz and 424Hz.By the analysis above, the distorted frequency range is nearly98Hz to 202Hz, the displacement unit is meter.VI. CONCLUSIONThe cutting part of shearer for harmonic response analysis at level, top, and bottom position is done to acquire the vibration displacement law corresponding to frequency. It concluded:(1) With the vibration in Y direction, node 1157 retains excellent amplification for the excitation signal, and maintains good transmission characteristics of the excitation force. So the region of node 1157 is suitable picking-up point monitoring the vibration in Y direction.(2) The sensors installed for vibration in Y direction should possess good transmission characteristics of the excitation force in the frequency range of 0 to 265Hz, for vibration in Z direction, the frequency range should be 0 to 200Hz.(3) It is shown that output signals for harmonic response analysis zoom out unlimitedly in the resonant frequencies, yet the signals of other frequencies retain good amplification; meanwhile, the signals of resonant frequencies should be filtered to avoid zooming out unlimitedly and interfering the normal output signals of coal-rock state.It is drawn that the picking-up point of the largest amplitude is obtained, and the placement point of accelerometer sensor is optimized; meanwhile. Frequency band of sensors is studied, the sensor also possesses the filtering effect. The reliability of physical experiment is wellverified in the simulation testing.b.中文翻译截割部谐波响应分析的物理仿真系统文摘-煤-主要是岩石界面识别系统收集各种响应信号可以从多传感器并进一步分析的装备和反应信号,来看看它是否在切割煤岩体。为了达到这个目的,这些装备总共五种类型的各种识别传感器获取这些信号。两个传感器的优化配置问题测量分和选择的传感器性能的关键因素能正确、全面收集在静听着的松林之间动态信号特征的截割部的物理仿真系统。因此,这是重要而且必不可少的进行谐响应动力学分析的剪切截割部。基于频率的振动特性响应进行了分析。本研究不仅优化配置振动传感器的最大的输出振幅信号,但也会辨识出语句的振动的频率范围传感器,因此它不仅满足条件如实的测量的工具,而且也避免了,由于传感器干扰对共振。关键词-截割部 有限元动力学 谐响应 煤和岩石的识别1. 介绍煤和岩石的识别系统主要是多传感器收集的希勒切削力的响应信号和对这些信号的分析。因此,它是获取信号号的基本前提。通常有两种方法：一种是在煤的界面收集数据，但却带来很多困难的结果，而且许多因素在某个程度上来说是有限的。另一种方法是在相似条件下在实验室建立物理仿真系统，包括媒体与模拟的工具牵引-切割机制,这种方式可以在很大的范围内调整煤岩体机械物理性能结构参数。同时，这种方法能严格控制试验参数，优化试验方法获得准确、可靠的结果。所以物理模拟系统开发的剪毛的的基础上相似原则。在切割不同材料时，摇臂的状态、升降气缸的压力、输入轴的扭矩信号、滚筒轴的扭转振动信号和切割电流的变化反应出切割状态的不同。所以要配备这五种类型的传感器来获取这些信号。最近几年，大家都把对煤和岩石的识别的研究工作的注意力放在融合研究上。不幸的是，很少关注到有效性数据本身的正确性提供的参考依据。这牵涉到传感器测量分的配置优化传感器测量分传感器性能的选择。鉴于此,本文将是对摇臂振动状态的分析和总结。所以截割部机进行物理模拟系统是由有限元谐波分析振动响应的特点,从截割部频率响应分析的角度来取得手臂振动的最佳契合点，优化振动传感器测量点，决定传感器的最终工作频率范围。2. 物理仿真系统的工具测试模型是根据相似理论基于原型电牵引采煤机(模型:MGTY400/900-3.3D)，并且是以1:8的比例设计的。在这基础上,这是重新进行了优化,并突出的简便性模型和达到要求的性能、低成本、简单的结构。的物理仿真系统以数字4表示：1.采煤机模型是由滚筒、摇臂、扭转力矩传感器、电机、液压缸和机身组成。截割部需要完成两种运动：以电机作为动力驱动滚筒完成切割;由液压缸来调整摇臂从上顶板到下地板的高度。3.水平位置上的谐波响应谐响应分析是一种用来确定稳态响应线性结构的负荷随着时间不断变化的方法。输入是谐波负载为已知的大小和频率。这个想法是计算了结构的反应在几个不同频率和获得一个曲线图的数量与一些反应频率。a. 建立三维模型当我们确保原结构的尺寸时，结构的质量，简化了的非重点研究的部件，一个用三维切削部分建模软件Pro / E建立的模型。他主要零件滚筒的直径是225毫米，长490毫米,高150毫米，宽154毫米或者宽735毫米等等。 b. 元素类型和材料性能的定义完成三维建模后，用ANSYS11.0软件对模型进行有限元分析。基于滚筒的结构，solid92固体元素的类型是选定的。这个元素类型适用于啮合由多种CAD /CAM建立的不规则网格模型。元素节点所定义的是十二次四面体元素的纯位移形函数。第二,采煤机的实验模型材料是钢，所以材料的性能是由各向同性材料决定的，弹性模量是206 Gpa, 泊松比0.3,密度是7800 kg / m 3。作为四面体单元类型被选中，网格是一个自由的啮合。网格密度能够满足传感器位置的优化的需求。如左图所示的网状模型图3, 从上到下为Y方向,是正方向; 水平方向X轴方向,向右是正方向；前后的Z方向，向前是正方向。节点分布如图4。c. 边界条件和适用的负载 因为采煤机的滑靴取决于机身，而建立模型,可以有效的去除所有强加在铰链上的位移约束的自由度。采煤机在工作过程中切割一煤水平, 摇臂杆位置是由气缸固定的,它通过铰接点限制所有自由度来使采煤机截割部达到一定高度。在谐响应分析,荷载应用作为F= Focoswt谐波负载。有两种方法可以适用负荷: 一种是虚构部分，另一种是相。本文，选择了虚构部分。负荷的峰值是F= 300N激振力，它的频率范围一般0到500赫兹，这是从实验室基于实验数据的选择。应用载荷点的被选择在滚筒前面的平行线上。应用负荷在向下方向的五点如图3所示。D谐波分析的结果截割部分的谐波分析的目的获得它的频率响应状态，测试传输特性的机理，研究在每个频率振动位移,并获得固有频率和乐队在变形的测量条件。选择节点1157、20060、20044、3388、583用于调查。振动的频率位移曲线在Y轴方向是显示在图5中, 这是来自保持的最大的振动位移的节点1157，它振动形式的其他节点是相似的节点1157。谐振频率的节点1157出现在38Hz,278Hz的,324Hz。扭曲的频率范围接近于278Hz到38Hz。通过分析相应于这三节点的位移值的频率, 位移节点的1157总体上大于其
- 温馨提示:
1: 本站所有资源如无特殊说明，都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
2: 本站的文档不包含任何第三方提供的附件图纸等，如果需要附件，请联系上传者。文件的所有权益归上传用户所有。
3.本站RAR压缩包中若带图纸，网页内容里面会有图纸预览，若没有图纸预览就没有图纸。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 人人文库网仅提供信息存储空间，仅对用户上传内容的表现方式做保护处理，对用户上传分享的文档内容本身不做任何修改或编辑，并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容，请与我们联系，我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
人人文库网所有资源均是用户自行上传分享，仅供网友学习交流，未经上传用户书面授权，请勿作他用。
川公网安备: 51019002004831号