关于带式输送机的几种软启动装置的分析

阐述国内外带式输送机的软启动装置,调速型液力偶合器、液体粘性软起动装置、CST系统、变频调速装置及电软启动的结构、工作原理和特点。     

带式输送机变频调速节能控制系统研究

带式输送机由于其连续性强、高效等特点在进行生产的过程中被广泛应用,然而在不均衡性开采时带式传输机的稳定性也会受到一定的影响,因此对于带式输送机变频调速节能控制系统的研究也有着非常重要的意义。本文主要介绍了带式输送机变频调速节能控制系统的相关内容,以供参考。     

变频调速技术在矿用带式输送机中的应用研究

以现代化矿井带式输送机为例,详细介绍变频调速技术在矿用带式输送机的工作原理,结合工作中实际情况,对变频调速技术的优点进行分析。(摘要重新拟写,参见文末例文标准)     

带式输送机电动滚筒的实际应用改型

通过对带式输送机驱动装置和电动滚筒在实际使用维护时的困难分析,介绍针对特定条件下对其的改型过程,改造后的驱动装置和传动滚筒实现备件通用和互换,节约成本,且系统运行更加稳定可靠,维护便捷。     

煤矿带式输送机节能技术的应用

由于煤矿带式输送机消耗的能量较大,为了节约一定的能源,我们对如何降低煤矿带式输送机进行了仔细的分析和探讨,并对煤矿带入式输送机中加入变频调速技术进行重点分析。针对煤矿带式输送机的运动量来调节它的带速,不仅有效式负载率得到了提高,并且还达到了煤矿带式输送机节约能源的目的。把模糊控制以及PLC控制相结合,从而实现自动化的煤矿带式输送机。     

简述普通三相异步电动机与变频调速电动机的区别及应用

本文就变频器对普通三相异步电动机的影响;变频电动机的特点;变频调速电机的应用进行分析,简要论述了变频电动机与普通异步电动机在结构、磁路、温升、效率、绝缘强度、震动、冷却的区别,以及变频调速节能装置的节能原理,变频调速在工农业应用领域的优缺点。对变频改造系统中的电机选用有一定的参考价值。     

浅谈一种煤矿用带式输送机驱动装置

本文主要介绍了一种煤矿用带式输送机驱动装置，与我国目前常用的带式输送机驱动方式进行比较，分析了本文介绍的驱动装置的优缺点。此驱动方式的煤矿用带式输送机大大延长了输送机驱动装置的使用寿命，解决了矿井输送机持续性生产问题，提高了生产效率。     

变频技术在发电厂的应用

如今,高压交流变频调速技术真的是上世纪90年代迅速蓬勃发展起来的一种新型电力传动调速高科技术啊,它的功能是主要用于交流电动机的变频调速技能,其技术和性能可以胜过其它任何一种调速方式。变频调速技术在调速范围节能、节能,调速精度、等方面具有同其它调速技术装置无法比拟的优越性,以及可以更方便的实现同自动化控制系统（如DCS系统等）的通讯功能,使其在各领域得到广泛且方便的实际应用。     

变频调速在乙烯装置裂解炉风机中的应用

通过分析乙烯装置裂解炉风机运行中的主要问题,对低压鼠笼式异步电动机采用变频调速装置,不仅可以减小电动机的启动电流,而且风机调速可以控制裂解炉炉膛温度的稳定,达到显著的节能目的。     

石洞口第二电厂输煤系统工艺及其主要设备的技术特性(续完)

4 带式输送机主要部件的特性 4.1 驱动装置、逆止器和滚筒 4.1.1 电动机 输送机驱动功率在224kW以下时电动机采用德国Simens公司产品,224kW以上时采用美国Westinghouse electric公司产品,它们均为最新的全封闭风冷式鼠笼电动机,前者为380V低压供电,后者为6000V高压供电。     

输送带纵向振动对多驱动驱动力分配影响的研究

带式输送机运行过程中,输送带所受的动张力沿输送带运行方向以波的形式传播,并在传播的过程中产生纵向振动,输送带较大的纵向振动会影响多滚筒驱动力的分配。本文以Kelvin-Voigt黏弹性模型作为输送带力学模型进行分析,由输送带的本构方程建立长距离带式输送机输送带纵向振动驱动力分配方程,以天津港某条头部双滚筒驱动长距离带式输送机为例,仿真启动过程中驱动滚筒的驱动力变化曲线及输送带振动曲线,将仿真结果与试验结果相比对,得到对于头部双滚筒驱动的带式输送机系统,随着输送带弹性模量的增大输送带振动减轻,双滚筒驱动驱动力的分配更加接近理想的功率配比的结果。研究结论为输送带的合理选型提供可靠依据,并能使电机工作在设计工作点附近,避免因驱动力分配不均而烧毁驱动电机。     

带式输送机用直线电机静动态特性试验与分析

多机驱动在输送装备实现高速、长距离、大运量等方面起着至关重要的作用。直线电机因其具有不存在摩擦、无旋转传动部件、能够沿输送机长度方向任意布置和降低输送带张力等特点而成为特殊高性能带式输送机较理想的中间驱动方式。通过分析直线电机的工作原理,对直线电机与旋转电机的优缺点进行了比较;针对带式输送机用直线电机,对比确定了其次级型式,并进行了次级输送带结构设计;基于封闭式散料储运物料试验系统建立了静动态特性试验台,并运用欧拉公式及逐点张力法求得直线电机推力(输送带张力差),进而分别对电压、气隙与推力之间的比例关系进行了试验验证,并间接进行了动态试验(机械特性试验),得到了推力关于输送带速度的数学表达式;基于Belt Analyst带式输送机计算分析软件,对输送带稳定运行及启动过程的张力进行了仿真分析,并与试验张力进行了对比分析。试验结果表明:推力分别与电压平方、气隙倒数的平方成正比;电压、气隙与推力之间的理论曲线与试验值相符;直线电机的推力与输入功率的比值较大,并随着气隙的减小,比值越来越大;与旋转电机相比,此直线电机无临界转速,并显示出很软的机械特性;稳定运行时张力的仿真值与试验值基本吻合,其相对误差均小于2%,但启动过程中张力试验值与仿真值误差较大,间接表明保证启动过程气隙均匀的重要性。研究结果可适用于多机配合驱动超长距离带式输送机的改进与实际应用中。     

Failure analysis of belt conveyor damage caused by the falling material. Part II: Application of computer metrotomography

Damage of a conveyor belt by impact of sharp material is referred to as breakdown. By conveyor belt breakdown it occurs to perforation of its individual layers. Identification of this type of damage is relatively simple by the help of visual control. However in practice it often occurs due to the impact of sharp material to local anomalies that are not recognizable as a breakdown because there is not fulfilled the basic condition of perforation for all layers of conveyor belt. Based on the visual control, this conveyor belt cannot be unequivocally determined to be damaged or suitable for operating condition. The paper presents analysis of the sample of the conveyor belt with local anomaly which was formed during the experimental measurements for determination of the dependence among the weight of sharp material falling on the conveyor belt, shatter height and force conditions in the conveyor belt. This is a type of damage, which is very often encountered in real conditions. The method of computer metrotomography is applied for the analysis in combination with the software Volume Graphics VG Studio MAX 2.2. The presented results could be applied in practice as a support tool for identification of conveyor belt damage.     

Failure analysis of textile rubber conveyor belt damaged by dynamic wear

This paper presents experimental measurements of selected properties of pipe conveyor belts, which are dynamically damaged. Apart from results of experimental measurements, new experimental analysis of inner structure of conveyor belt by computer tomography is used.The aim of the paper is to show the change of physical and mechanical properties of dynamically damaged conveyor belts and analyze their inner structure–conveyor belt carcass by non-destructive method of analysis.The next goal of the paper is to clarify if dynamic wear of the conveyor belt damages the inner structure and verify the suitability of non-traditional but promising computer tomography method for conveyor belt analysis.     

平面转弯带式输送机启动过程计算机仿真

针对大型平面转弯带式输送机动态设计问题,通过平面转弯带式输送机转弯部分的导向力和阻力分析,得出转弯段输送带运行的阻力计算方法,采用离散模型建立了系统的动力学方程。开发了平面转弯带式输送机动态分析软件,通过对实际系统的仿真,得出输送机启动过程各单元的位移、速度、加速度和张力等数值结果,绘制出相应的曲线,证明了其正确性。通过对直线运行输送机和转弯运行输送机仿真结果的比较,得出了转弯运行对带式输送机的影响。     

Failure analysis of conveyor belt in terms of impact loading by means of the damping coefficient

Detailed examination of conveyor belts in practice indicates a strong impact of the wear and damage, caused by the dynamic impact loading, on the conveyor belt service life. To examine the effects of the impact process, the theoretical, experimental, and numerical analyses were carried out, including the determination of the degree of damage to conveyor belt cover layers and chassis. The impact process analysis is based on the hypothesis that the movement of an object falling onto the conveyor belt and then bouncing on it is similar to the damped harmonic motion. The hypothesis is confirmed by the verification study of model (calculated) damping coefficient values, whereas the damping coefficient values were obtained from the experiment at various values of input parameters for the impact process, such as the drop height, weight of the falling object, and presence or absence of idlers.The numerical modelling of the impact process was carried out applying the basis statistical methods and the multiple regression analysis. The output thereof represents the created regression models of the damping coefficient. The results of the process of conveyor belt wear and damage, in terms of dynamic impact loading, provide a new approach to the determination of the conveyor belt impact resistance based on the damping coefficient.     

多节伸缩装车机相关计算理论研究

目的 对多节伸缩装车机的输送运动和伸缩运动进行相关计算理论的研究,方便进行关键部件的选型,保证选型的正确性。方法 以伸缩装车机的结构为基础,结合现有的相关研究理论,分析多节伸缩装车机输送带驱动辊筒圆周力的组成部分,得出输送带驱动辊筒圆周力的计算方法;以机架伸缩运动原理为基础,对伸缩装车机各级伸缩部分进行受力分析,得出伸缩驱动力的计算方法;以某伸缩装车机产品为例,结合SolidWorks motion模块仿真结果,对计算方法进行验证。结果 验证结果表明,通过输送带驱动辊筒圆周力和伸缩驱动力计算所得的驱动电机功率与产品一致。结论 伸缩装车机输送运动和伸缩运动相关参数计算方法可行,结果正确,在伸缩装车机的研究中有一定的参考价值。     

高速电主轴驱动控制技术研究综述

高速电主轴是高速数控机床核心功能部件,主轴单元融合了高速电机、精密轴承、驱动控制等关键技术。高速主轴电机的驱动控制技术是决定主轴动静态性能的关键因素之一。因此,有必要对现有的主轴电机驱动控制技术进行系统分析和深入总结。根据主轴电机驱动控制技术的发展历史:从V/f控制、矢量变频控制、直接转矩控制到混合驱动控制以及智能控制等关键控制技术进行逐一分析和评述。在此基础上总结各控制技术客观存在的问题并进行对比分析,最后对高速电主轴驱动控制技术的发展趋势进行了预测和展望。     

缓冲托辊和缓冲床在选煤厂中的应用及比较

缓冲托辊和缓冲床是带式输送机上常用的组件,其作用均为带式输送机受料部位支撑缓冲作用,本文通过缓冲托辊和缓冲床的结构原理的比较,分析其各自优缺点,并结合多年选煤厂设计和使用经验着重介绍缓冲床结构和正确选购。     

Design and Application of Leather Replacement Tool for Belt Conveyor Seal

In order to solve the problem which may be generated in the case of manual replacement of the belt conveyor sealing leather,such as the operation space is small,the work efficiency is low and the finger is easy to be scratched,Using the principle of simulated bionics,through theoretical analysis and experimental verification,a tool was designed to replace the belt conveyor sealing leather. The tool includes a limit device,feeding device,U-shaped handle three parts,suitable for the replacement of various types and sizes of belt conveyor sealing leather. Use this tool to replace the belt conveyor sealing leather,the results show that: 1) The effect of replace belt conveyor sealing leather is good,belt conveyor sealing leather flat and solid. 2) The replacement process averaged 1.77 min,shorter than the original method of more than 8 min. 3) Direct contact of the fingers and the metal baffle edge was avoided,so as to reduce the chances of a finger injury.