外文翻译带式输送机的调试及对其液压自动拉紧装置的研究.doc

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1、英文原文Commissioning of the belt conveyor and automatically tighten its hydraulic device of Hydraulic belt conveyor automatically tensioning device is based on tape and in normal operation at the start of the strain of the different needs of the tape, after reasonable analysis of tension model designed

2、 Hydraulic automatically tensioning device is the traditional way tighten the upgrading products can be widely used in coal, metallurgical, power plants, cement plants, terminals and other bulk material conveyor belt of the take-up equipment. Belt conveyor after two centuries of development. Has be

3、come from the initial prototype development with a high-speed, long distance, high-power, the capacity of modern means of transport, belt conveyor widely used in metallurgy, mining, chemical industry, ports, power plants, light industry, building materials and food And many other enterprises on the

4、field. Because of their steady and reliable work belt conveyor, the noise of small, simple structure and operation of low-cost, anywhere in feeding or unloading. Has become a major granular material transport equipment one. As the conveyor belt of the viscoelastic properties, in order to ensure belt

5、 conveyor running the necessary friction, we must provide a suitable strain of. Tension belt conveyor device is an important and indispensable component of its properties have a direct impact on the overall performance of belt conveyorsConveyor belt by the nose, tail, drive, drag roller, roller, ask

6、ed planes, belts, consisting of cleaning, etc. Conveyor belt installed in the end, officially put into use, the equipment needed to debug.1. A conveyor belt of the debugging process 1.1 belt conveyor belt conveyor belt deviation running belt deviation is the most common fault. Failure to resolve the

7、 focus of attention should be paid to such installation of dimensional accuracy and day-to-day maintenance. Deviation due to a combination, depending on the need to address the reasons for differences. Such as:1.1.1 adjustment drag roller bearing GroupThe belt-belt in the central belt of the transpo

8、rt plane deviation, they can drag roll by adjusting the group to adjust the location of deviation. Specific method is biased belt which side of the trailer roll group which side of the direction of advancement in the belt, or the other side after the shift.1.1.2 adjustment bend drum-driven drum and

9、the location of drum-driven drum and bend the adjustment deviation adjustment of the belt is an important link. Because a belt transport planes at least 2-5 drum, drum all the installation location must be perpendicular to the length of the belt transports the centerline, if skewed too much inevitab

10、le deviation.1.2 unusual noiseRunning its transport belt drive, drive pulley and bend drum roll and drag Group, is not normal in abnormal noise will be issued, according to the abnormal noise judgement of equipment failure.1.2.1 serious drag roll eccentricity when the noise. Conveying belt running t

11、ractors will happen very often roll noise and vibration mix is cyclical. In particular, is a return drag roll, because of their greater length, its own weight, and also more noise. Noise in the two main reasons: First, manufacturing tractors roll of seamless steel pipe wall thickness uneven, the gre

12、ater the centrifugal force and the other is in the processing of bearings at either end of the round hole with the heart of bias, so that was too large centrifugal force . Bearing in not allowing the noise and damage to the existence of too large. Bearing in not allowing the noise and damage to the

13、circumstances may continue to use.1.2.2 shaft coupling the two different heart when the noise. In the high-speed drive motor-reducer and asked the coupling of the band or brake coupling Department issued a round of the unusual noise, the noise and also with the same frequency of rotating motor vibra

14、tion. This should be a noise reducer in time to motor to adjust the location, in order to avoid reducer input shaft fracture. 1.2.3 bend and rolling Chien Chien-driven roller abnormal noise. Bend and drum-driven drum normal working hours noise is very small, unusual noise in general is damaged beari

15、ngs, housings Department issued Kaka beep, at this time to replace bearings1.3 belt skid.Tensioning device using a heavy hammer of the belt when the plane skid in the belt to add weight to resolve, added to the belt so far not slippery. But should not add too much, so as to keep the belt too much to

16、 bear unnecessary tension and reduce belt life.2. tensioning device research2.1 tensioning device featuresIn the course of running belt conveyors, should be able to solve the start-up, parking at the tape skid, and the impact of the loss of tension and other issues, with the use of the belt conveyor

17、 continuous expansion and the constant development of science and technology, and rational design tensioning device It is particularly important. Tensioning device functions in the following points:2.1.1 ensure that the tape drive from the point of roller Ben sufficient tension, thus ensuring drive

18、must rely on the friction drive transmission friction traction, driven conveyor to the normal operation , The conveyor system to prevent skidding.2.1.2 ensure that the smallest branch of carrying the tension point must be tension, restrictions on the conveyor belt in the roller asked the sag, and en

19、sure normal operation of belt conveyors, not because of the conveyor system down through the vertical jump impact caused the coal roller Losses caused by the electrical energy and the materials, such as flesh littered the phenomenon. 2.1.3 compensation tape and plastic deformation transition conditi

20、on elongation qualitative change. As load will cause changes in the length of the conveyor system changes, creep phenomenon may cause conveyor belt extension, the tension there is a change in the trend of small, to absorb the need tensioning device by the creep of the SIN, to maintain normal operati

21、on of the conveyor The minimum required tension, thus ensuring the normal operation of belt conveyors.2.1.4 for the conveyor belt to make the necessary joint trip preparations. Each has a number of joint belt conveyor, when asked in a possible joint will have problems, we must first cut redo, tensio

22、ning device for belt conveyor prepared a load other than the transport belt, this can be through joint failure Relaxation of tension joints to solve the re-installation. 2.2 PrincipleHydraulic-tensioning device is the automatic use of the conveyor belt sensors Rally Rally, and given after the rally

23、to compare. Tightly control the hydraulic cylinder movement. Prior to the commencement of the belt conveyor, hydraulic tensioning device first launched by hydraulic cylinder moves to tighten T1 value of the conveyor system to activate Rally value (the value of the normal operation of about 1.5 times

24、). Conveyor and then start the motor, so that the T2 =: e remain constant this relationship, so as to achieve the objective to prevent slipping. After the launch, after the conveyor belt to the rated speed, T2 are automatically converted to the stable functioning of value. In the stable operation of

25、 state, the conveyor belt Rally almost unchanged, tensioning device fixed. When the load changes or because of other causes Rally distribution changes, so that larger value of T2, hydraulic cylinders will be automatically moves, so that the elastic deformation of the conveyor system in order to redu

26、ce the T2 lower. When the 112 hours of change, sensing vigorous rally will send a signal to promote the hydraulic cylinder hydraulic pump oil supply tension. T2 to achieve this ratio to a constant value.3. Main features and functions. Belt conveyor hydraulic winch dynamic tensioning device with the

27、characteristics of the following areas:3.1 Taking into account current in direct response to load on the conveyor belt of change, drum-driven motor current use as a feedback signal, and then under the conveyor belt, load on the direct regulation of changes in the conveyor belt tension, This will fun

28、damentally overcome the traditional design of the problems so that the conveyor belt at the turn of tension and relaxation of the state, to extend the life of a conveyor belt to meet the conveyor belt on the slippery, Droop of the conditions is not overrun, belt conveyor to maintain normal operation

29、 of the required minimum take-up of dynamic tension, you can achieve the best effect of dynamic tension, the tensioning device can also is studying the conveyor The dynamic design of the match, conveyor to the current situation of the potential.3.2 According to the conveyor belt on the condition and

30、 the tension.Different requirements, simply modify procedures in the corresponding SCM conditions of parameters, you can make the conveyor belt tensioning devices adapt to the needs of all kinds, can be arbitrary regulation conveyor start and stable operation of the tension, to meet the full commenc

31、ement of Tension over the stable operation of the tension on the 1.4 to 1.5 times the request.3.3 system response speed, high stability.Commencement of belt conveyors, hydraulic station can immediately move to the electromagnetic valve brake-by reducing the fuel tank pressure to increase metres from

32、 the clutch asked, tensioning device released tape, timely compensation tape elongation , Reducing the tape-edge-to-bear-impact, not only stable and reliable transmission is activated, it is better to protect the tape, broken belt can reduce accidents. Hydraulic belt conveyor dynamic tensioning devi

33、ce can automatically achieve dynamic tension, and fundamentally resolve the tension regulating the issue of lack of coordination, fast response, the take-up better-performing, have a good economic value, has a broad Application, to conveyor current trend of development.中文译文带式输送机的调试及对其液压自动拉紧装置的研究带式输送

34、机液压自动拉紧装置是根据胶带在起动和正常运转时对拉紧力的不同需要，经合理的胶带张力模型分析研究而设计的。液压自动拉紧装置是传统拉紧方式的更新换代产品，可广泛应用于煤矿、冶金、电厂、水泥厂、码头等各种散物料带式输送设备的张紧。带式输送机经过两个世纪的发展。已成从最初的雏形发展成为高带速、长运距、大功率、大运量的现代化运输工具，带式输送机广泛应用于冶金、矿山、化工、港口、电站、轻工、建材和粮食等许多上企业领域。带式输送机因其工作平稳可靠、噪声小，结构简单，运行费用低，可在任意位置加料或卸料。已成为主要的散体物料运输设备之一。由于输送带的粘弹性的特性，在带式输送机运行时为了保证必要的摩擦力，必须提供

35、合适的拉紧力。张紧装置是带式输送机不可缺少的重要组成部分，它的性能好坏直接影响带式输送机整体的性能。皮带输送机是由机头、机尾、驱动装置、拖辊、滚筒、中问架、皮带、清扫器等组成的。在皮带输送机安装结束，正式投入使用前，需对设备进行调试。1.皮带输送机的调试过程1.1皮带输送机皮带跑偏皮带输送机运行时皮带跑偏是最常见的故障。为解决这类故障重点要注意安装尺寸精度与日常的维护保养。跑偏的原因有多种，需根据不同的原因区别处理。如：1.1.1调整承载拖辊组皮带机的皮带在整个皮带运输机的中部跑偏时，可通过调整拖辊组的位置来调整跑偏。具体方法是皮带偏向哪一侧，拖辊组的哪一侧朝皮带前进方向前移，或另外一侧后移。

36、1.1.2调整驱动滚筒与改向滚筒的位置驱动滚筒与改向滚筒的调整是皮带跑偏调整的重要环节。因为一条皮带运输机至少有2到5个滚筒，所有滚筒的安装位置必须垂直于皮带运输机长度方向的中心线，若偏斜过大必然发生跑偏。1.2异常噪音皮带运输机运行时其驱动装置、驱动滚筒和改向滚筒以及拖辊组，在不正常时会发出异常的噪音，根据异常噪音判断设备的故障。1.2.1拖辊严重偏心时的噪音。皮带运输机运行时拖辊常会发生异常噪音，并拌有周期性的振动。尤其是回程拖辊，因其长度较大，自身重量大，噪音也比较大。发生噪音的原因主要有两个：一是制造拖辊的无缝钢管壁厚不均匀，产生的离心力较大；二是在加工时两端轴承孔与外圆圆心偏差较大，

37、使离心力过大。在轴承不损坏并允许噪音存在的情况过大。在轴承不损坏并允许噪音存在的情况下可以继续使用。1.2.2联轴器两轴不同心时的噪音。 在驱动装置的高速端电机与减速机之问的联轴器或带制动轮的联轴器处发出的异常噪音，这种噪音也伴有与电动机转动频率相同的振动。发生这种噪音时应及时对电机减速机的位置进行调整，以避免减速机输人轴的断裂。1.2.3改向滚简与驱动滚简的异常噪音。改向滚筒与驱动滚筒正常工作时噪音很小，发生异常噪音时一般是轴承损坏，轴承座处发出咯咯响声，此时要更换轴承。1.3皮带打滑使用重锤张紧装置的皮带运输机在皮带打滑时可添加配重来解决，添加到皮带不打滑为止。但不应添加过多，以免使皮带承

38、受不必要的过大张力而降低皮带的使用寿命。2.拉紧装置的研究2.1张紧装置的功能在带式输送机运行过程中，应能解决起动、停车时胶带打滑、张力损失及冲击力等问题，随着带式输送机用途的不断扩大和科学技术的不断发展，合理设计张紧装置就显得尤为重要。张紧装置的功能主要有以下几点：2.1.1保证胶带任驱动滚筒奔离点的足够张力，从而保证驱动装置依靠摩擦传动所必须传递的摩擦牵引力，以带动输送机的正常运转，防止输送带打滑。2.1.2保证承载分支最小张力点的必须张力，限制输送带在托辊之问的垂度，保证带式输送机正常运行，不致因输送带下垂度过大导致煤炭垂直跳动冲击托辊而造成电机损失能量大和物料洒落等现象。2.1.3补偿

39、胶带塑性变形与过渡，工况下伸长质的变化。由于负载变化会引起输送带发生长度变化，蠕变现象也会造成输送带伸长，张紧力有变小趋势，需要张紧装置来吸收由蠕变产生的仲长，维持输送机正常运行所需的最小张紧力，从而保证带式输送机的正常运行。2.1.4为输送带重新接头做必要的行程准备。每部带式输送机都有若干个接头，可能在某一时问接头会出现问题，必须截头重做，张紧装置为带式输送机准备了负荷以外的运输带，这样接头故障就可以通过放松张紧装置重新接头来解决。2.2工作原理液压自动式拉紧装置是利用拉力传感器反映输送带的拉力，与给定拉力进行比较后控制拉紧液压缸的运动。在带式输送机启动前，液压拉紧装置先启动，通过液压缸的动

40、作，拉紧输送带使T1值达到启动拉力值(约为正常运转值的15倍)。然后启动输送机的电动机，这样就使T2=：e这一关系保持恒定，以达到防止打滑的目的。启动完毕后，输送带达到额定速度以后，T2自动转换为稳定运转值。在稳定运行状态下，输送带拉力几乎不变，拉紧装置不动。当负荷变化或因其他原因引起拉力分布变化，使T2值变大时，液压缸将自动动作，使输送带的弹性变形减小以便T2降低。当112值变小时，拉力传感搽将发出信号，使液压泵供油推动液压缸拉紧使T2这一比值重新达到恒定值。3.主要特点及功能带式输送机液压绞车动态张紧装置具有以下几方面的特点：3.1考虑到电流的变化可以直接反应输送带上载荷量的变化，利用驱动

41、滚筒电机电流作为反馈信号，然后根据输送带，上载荷量的变化直接调节输送带所需的张紧力，这样可以从根本上克服传统设计中出现的问题，使输送带处于张紧和松弛的交替状态中，延长了输送带的使用寿命，满足输送带小打滑、下垂度不超限的条件，保持带式输送机正常运行所需的最小张紧力，实现动态张紧，可以达到最佳的动态张紧效果，此张紧装置还可以与正在研究的输送机的动力学设计相匹配，适应输送机目前的发形势势。 3.2根据输送机的工况及对胶带张紧力的 不同要求，只需修改单片机程序中对应条件的参数，就可以使张紧装置适应各种输送带的需要，可以任意调节输送机启动和稳定运行时的张紧力，完全可以满足启动时的张紧力比稳定运行时的张紧力大上1415倍的要求。3.3系统响应速度快，稳定性高。带式输送机启动时，液压站能立刻动作，电磁换向阀到制动位，通过减小油缸压力来米增大离合器问距，拉紧装置放出胶带，及时补偿胶带的伸长量，减小了胶带松边对紧边的冲击，不但使输送机启动平稳可靠，而且是较好地保护了胶带，可减少断带事故的发生。液压带式输送机动态张紧装置可以自动实现动态张紧，从根本上解决张紧力调节不协调出现的问题，响应速度快，张紧效果较好，有很好的经济价值，具有广泛的应用前景，适应输送机目前的发展趋势。