Bently速度传感器9200-01-01-10-00,上海韦米机电设备有限公司主营销售产品,原厂原装,质量保障,销售热线:13524123009,传真:021-51334670;联系人:雷青。热诚欢迎新老客户咨询购买!
Bently Nevada Seismoprobe速度传感器系统测量轴承箱、机壳或结构的绝对(相对于自由空间)振动|该两线系统由传感器、电缆和可选的速度-位移转换器组成。
Seismoprobe系列速度传感器是两线结构,采用动线圈技术,提供直接正比于传感器振动速度的电压输出。与固体速度传感器(本质上是加速度计中嵌入积分电子电路)不同,动线圈传感器对冲击或脉冲励磁的敏感性降低,是更好的应用选择。此外,由于它们不要求外部电源,所以使便携式测量应用更加方便。
Seismoprobe速度传感器共有三种:
9200: 9200是两线传感器,适用于连续监测或与测试或故障诊断仪表-起应用于周期性测量中。当与整体电缆一同订购时,9200具有卓越的抗腐蚀性,不需要额外保护。
74712: 74712是9200的高温应用版本。
47633: 47633的安装方式较少,只提供整体铠装电缆。它的设计采用可替换
的夹头,当动线圈磨损后易于替换。它用于速度传感器安装方式有限且只需提供简单性能的一般用途机械。
多种联接电缆可以将9200和74712传感器与其它仪表或速度-位移转换器联接
起来。这些电缆以300毫米(1英尺递增,有或没有不锈钢铠装。
有两种类型的速度-位移转换器(VDC)可供选择:
9513:与9200和74712传感器-起使用。
46687:与47633传感器一起使用。
注意
如果箱体测量是为了对机器进行整体保护,应考虑每种测量的有用性。大多数常见的机器故障(不平衡、不对中等)在转子上产生,并引起转子振动的增加(至少发生改变)。为了使只通过任何箱体测量就可以对机器实现有效的整体保护,必须要有足够大的转子振动被如实地传递到轴承箱体或机壳上,或在更特殊的情况下,传递到传感器的安装位置。
此外,对传感器的物理安装要多加注意。不正确的安装会引起传感器幅值和相位响应的减少,并且/或导致产生不代表真实机器振动的信号。根据要求,Bently Nevada可以提供工程化服务,帮助用户对有疑问的机器选择适当的箱体测量方式,并且/或提供安装协助。
Bently速度传感器9200-01-01-10-00
本特利Bently速度传感器
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轴承箱又称绞箱,是一种起支撑和润滑轴承作用的箱体零件。同时,承受设备在工作时产生的轴向和径向力。在有旋转轴的设备中,轴一般是由轴承支撑起来旋转的,轴承则安装在轴承箱中,轴承箱中注有润滑油,在工作过程中,使用轴承得到润滑。同时,轴在工作时所受到的各种力也会传递到轴承箱上,由轴承箱承载。轴承箱的材质一般为铸铁和铸钢。多用于车轮组。
离心式鼓风机的工作原理
离心式鼓风机的工作原理与离心式通风机相似,只是空气的压缩过程通常是经过几个工作叶轮(或称几级)在离心力的作用下进行的。鼓风机有一个高速转动的转子,转子上的叶片带动空气高速运动,离心力使空气在渐开线形状的机壳内,沿着渐开线流向风机出口,高速的气流具有一定的风压。新空气由机壳的中心进入补充。
单级高速离心风机的工作原理是:原动机通过轴驱动叶轮高速旋转,气流由进口轴向进入高速旋转的叶轮后变成径向流动被加速,然后进入扩压腔,改变流动方向而减速,这种减速作用将高速旋转的气流中具有的动能转化为压能(势能),使风机出口保持稳定压力。
从理论上讲,离心鼓风机的压力-流量特性曲线是一条直线,但由于风机内部存在摩擦阻力等损失,实际的压力与流量特性曲线随流量的增大而平缓下降,对应的离心风机的功率-流量曲线随流量的增大而上升。当风机以恒速运行时,风机的工况点将沿压力-流量特性曲线移动。风机运行时的工况点,不仅取决于本身的性能,而且取决于系统的特性,当管网阻力增大时,管路性能曲线将变陡。风机调节的基本原理就是通过改变风机本身的性能曲线或外部管网特性曲线,以得到所需工况。
齿轮箱是在风力发电机组中应用很广泛的一个重要的机械部件。其主要功用是将风轮在风力作用下所产生的动力传递给发电机并使其得到相应的转速。
通常风轮的转速很低,远达不到发电机发电所要求的转速,必须通过齿轮箱齿轮副的增速作用来实现,故也将齿轮箱称之为增速箱。
齿轮箱承受来自风轮的作用力和齿轮传动时产生的反力,必须具有足够的刚性去承受力和力矩的作用,防止变形,保证传动质量。齿轮箱箱体的设计应按照风电机组动力传动的布局安排、加工和装配条件、便于检查和维护等要求来进行。随着齿轮箱行业的不断飞速发展,越来越多的行业和不同的企业都运用到了齿轮箱,也有越来越多的企业在齿轮箱行业内发展壮大。
齿轮箱用途
1.加速减速,就是常说的变速齿轮箱.
2.改变传动方向,例如我们用两个扇形齿轮可以将力垂直传递到另一个转动轴.
3.改变转动力矩.同等功率条件下,速度转的越快的齿轮,轴所受的力矩越小,反之越大.
4.离合功能: 我们可以通过分开两个原本啮合的齿轮,达到把发动机与负载分开的目的.比如刹车离合器等.
5.分配动力.例如我们可以用一台发动机,通过齿轮箱主轴带动多个从轴,从而实现一台发动机带动多个负载的功能.