BENTLY两线传感器9200-06-05-05-00,本特利两线速度传感器,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,热诚欢迎新老客户咨询购买!
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具有的抗腐蚀性,不需要额外保护。
美国BENTLY动线圈速度传感器
美国BENTLY速度传感器系统 - 9200, 74712 和 47633
美国BENTLY 9200、74712、47633 传感器是2线动线圈速度传感器,用于一般用途的速度测量。 但对于大多数应用,我们还是推荐使用我们的美国BENTLY Velomitor 压电式速度传感器。
检定规程和流量仪表标准是流量传感器可以准确进行测量的保障。在很多领域里,流量的准确测量都非常的重要,在经济领域内被广泛应用,例如:环境监测、安全防护以及贸易结算等等。
按照流量传感器的结构型式可分为叶片(翼板)式、量芯式、热线式、热膜式、卡门涡旋式等几种。
按其标准性质来分类,可以分为下面几类。方法标准:一些传感器的计算方法、 检测方法、试验方法以及性能的评定方法等等;基础标准:一些传感器的规范的基本参数、型号、命名以及在测量过程中的*术语;产品标准:此类传感器已被快易优收录,它规定传感器的技术要求、验收的规则、试验的方法以及产品的分类,除此之外,还有正确安装和使用的要求等等。有一些标准只有正确的安装和使用技术,这些就是产品标准中的产品应用性质。
1)按输入量分类:位移传感器、速度传感器、温度传感器、压力传感器等
2)按工作原理分类:应变式、电容式、电感式、压电式、热电式等
3)按物理现象分类:结构型传感器、特性型传感器
4)按能量关系分类:能量转换型传感器、能量控制传感器
5)按输出信号分类:模拟式传感器、数字式传感器
BENTLY两线传感器9200-06-05-05-00
本特利Bently速度传感器
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电涡流传感器在大型旋转机械中的应用
电涡流传感器系统广泛应用于电力、石油、化工、冶金等行业和一些科研单位。对汽轮机、水轮机、鼓风机、压缩机、空分机、齿轮箱、大型冷却泵等大型旋转机械轴的径向振动、轴向位移、键相器、轴转速、胀差、偏心、以及转子动力学研究和零件尺寸检验等进行在线测量和保护。
一、轴向位移测量
对于许多旋转机械,包括蒸汽轮机、燃汽轮机、水轮机、离心式和轴流式压缩机、离心泵等,轴向位移是一个十分重要的信号,过大的轴向位移将会引起过大的机构损坏。轴向位移的测量,可以指示旋转部件与固定部件之间的轴向间隙或相对瞬时的位移变化,用以防止机器的破坏。
轴向位移是指机器内部转子沿轴心方向,相对于止推轴承二者之间的间隙而言。有些机械故障,也可通过轴向位移的探测,进行判别:1、止推轴承的磨损与失效;2、平衡活塞的磨损与失效;3、止推法兰的松动;4、 联轴节的锁住等。
轴向位移(轴向间隙)的测量,经常与轴向振动弄混。轴向振动是指传感器探头表面与被测体,沿轴向之间距离的快速变动,这是一种轴的振动,用峰峰值表示。它与平均间隙无关。有些故障可以导致轴向振动。例如压缩机的踹振和不对中即是。
二、振动测量
测量径向振动,可以由它看到轴承的工作状态,还可以看到转子的不平衡,不对中等机械故障。可以提供对于下列关键或基础机械进行机械状态监测所需要的信息:1、工业透平,蒸汽/燃汽;2、压缩机,空气/特殊用途气体,径向/轴向;3、膨胀机;4、动力发电透平,蒸汽/燃汽/水利;5、电动马达、发电机 ;6、励磁机;7、齿轮箱;8、泵;9、风扇、风机;10、往复式机械。
振动测量同样可以用于对一般性的小型机械进行连续监测。可为如下各种机械故障的早期判别提供了重要信息:
1、轴的同步振动,油膜失稳;
2、转子摩擦,部件松动;
3、轴承套筒松动,压缩机踹振;
4、滚动部件轴承失效,径向预载,内部/外部包括不对中;
5、轴承巴氏合金磨损,轴承间隙过大,径向/轴向;
6、平衡(阻气)活塞磨损/失效 ,联轴器“锁死”;
7、轴弯曲,轴裂纹;
8、电动马达空气间隙不匀,齿轮咬合问题;
9、透平叶片通道共振,叶轮通过现象。
三、偏心测量
偏心是在低转速的情况下,电涡流传感器系统可以对轴弯曲程度的测量,这种弯曲可由下列情况引起:
1、原有的机械弯曲 ·临时温升导致的弯曲 ·在静止状态下,必然有些向下弯曲,有时也叫重力弯曲,外力造成的弯曲。
2、偏心的测量,对于评价旋转机械全面的机械状态,是非常重要的。特别是对于装有透平监测仪表系统(TSI)的汽轮机,在启动或停机过程中,偏心测量已成为不可少的测量项目。它使你能看到由于受热或重力所引起的轴弯曲的幅度。转子的偏心位置,也叫轴的径向位置,它经常用来指示轴承的磨损,以及加载荷的大小。如由不对中导致的那种情况,它同时也用来决定轴的方位角,方位角可以说明转子是否稳定。
四、胀差测量
对于汽轮发电机组来说,在其启动和停机时,由于金属材料的不同,热膨胀系数的不同,以及散热的不同,轴的热膨胀可能超过壳体膨胀;有可能导致透平机的旋转部件和静止部件(如机壳、喷嘴、台座等)的相互接触,导致机器的破坏。因此胀差的测量是非常重要的。
五、转速测量
对于所有旋转机械而言,都需要监测旋转机械轴的转速,转速是衡量机器正常运转的一个重要指标。而电涡流传感器测量转速的优越性是其它任何传感器测量没法比的,它既能响应零转速,也能响应高转速,抗干扰性能也非常强。
旋转测量通常有以下几种传感器可选:电涡流转速传感器、无源磁电转速传感器、有源磁电转速传感器等。具有需要选择那类传感器,则要根据转速测量的要求转速等,(转速发生装置有以下几种:用标准的渐开的线齿数(M1~M5)作转速发生信号,在转轴上开一键槽、在转轴在转轴上开孔眼、在轴转上凸键等转速发生信号装置。
六、滚动轴承、电机换向器整流片动态监测
对使用滚动轴承的机器预测性维修很重要。探头安装在轴承外壳中,以便观察轴承外环。由于滚动元件在轴承旋转时,滚动元件与轴承有缺陷的地方相碰撞时,外环会产生微小变形。监测系统可以监测到这种变形信号,当信号变形时意味着发生了故障,如滚动元件的裂纹缺陷或者轴承环的缺陷等,还可以测量轴承内环运行状态,经过运算可以测量轴承打滑度。
离心式空气压缩机的原理是由叶轮带动气体做高速旋转,使气体产生离心力,由于气体在叶轮里的扩压流动,从而使气体通过叶轮后的流速和压力得到提高,连续地生产出压缩空气。
离心空压机主要由转子和定子两大部分组成。转子包括叶轮和轴。叶轮上有叶片,此外还有平衡盘和轴封的一部分。定子的主体是机壳(气缸),定子上还安排有扩压器、弯道、回流器、迸气管、 排气管及部分轴封等。离心压缩机的工作原理为,当叶轮高速旋转时,气体随着旋转,在离心力作用下,气体被甩到后面的扩压器中去,而在叶轮处形成真空地带,这时外界的新鲜气体进入叶轮。叶轮不断旋转,气体不断地吸入并甩出,从而保持了气体的连续流动。
离心式空压机依靠动能的变化来提高气体的压力。当带叶片的转子(即工作轮)转动时,叶片带动气体转动,把功传递给气体,使气体获得动能。进入定子部分后,因定子的扩压作用速度能量压头转换成所需的压力,速度降低,压力升高,同时利用定子部分的导向作用进入下一级叶轮继续升压,后由蜗壳排出。对于每一台压缩机,为了达到设计需要压力,每台压缩机都设有不同数量的级数和段数,甚至有几个缸体组成 。
离心式空气压缩机的空气系统并不复杂,室外空气经吸风塔和空气过滤器接入空压机一段进气口,通过空压机内部高速旋转的叶轮对空气做功,使空气压力、温度、流速提高,然后流入扩压器,再使空气流速降低,压力进一步提高,并经导向装置使空气流入下一级叶轮继续压缩。由于空气经逐级压缩后的温度不断升高,而在下一级中压缩温度高的空气则需多耗功,为了降低空气温度,减少压缩功耗,在多级离心式空气压缩机的空气系统中,往往采用分段中间冷却的结构。因此在本工程中,空气经一段压缩至0.241MPa,151℃(一段可以包括几个级,也可仅有一个级),由一段排气口排出空压机本体,并引入中间冷却器与循环水进行一次换热,冷却后的压缩空气接入空压机二段进气口继续压缩至0.379MPa,99℃,由二段排气口排出空压机本体,并引入末级冷却器与循环水进行二次换热,冷却后的压缩空气经空气加热器干燥后由管道输送至各用气点。
本特利BENTLY速度传感器订货型号:
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本特利Bently主营产品:电涡流传感器系统、前置器、探头、延伸电缆、变送器、胀差传感器、速度传感器、加速度传感器、速度计、压电式速度传感器、壳体膨胀传感器系统、高温机壳体膨胀传感器系统、接口模块,框架模块,电源模块、框架接口模块、瞬态数据接口模块、键相位模块、继电器模块、前置器监测模块、速度加速度监测器模块、触摸屏、测速模块、温度显示器、温度监测模块、通信网关模块、校验仪。