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电涡流传感器的特点
电涡流传感器通过电涡流效应原理，准确测量被测体与探头端面的相对位置，其特点是长期工作可靠性好、灵敏度高、抗干扰能力强、非接触测量、响应速度快、不受油水等介质的影响，常被用于对大型旋转机械的轴位移、轴振动、轴转速等参数进行长期实时监测，可以分析出设备的工作状况和故障原因，有效地对设备进行保护及预维修。
1、电涡流位移传感器能测量被测体(必须是金属导体)与探头端面的相对位置。
2、电涡流位移传感器长期工作可靠性好、灵敏度高、抗干扰能力强、非接触测量、响应速度快、不受油水等介质的影响，常被用于对大型旋转机械的轴位移、轴振动、轴转速等参数进行长期实时监测，可以分析出设备的工作状况和故障原因，有效地对设备进行保护及进行预测性维修。
3、从转子动力学、轴承学的理论上分析，大型旋转机械的运行状态主要取决于其核心——转轴，而电涡流位移传感器能直接测量转轴的状态，测量结果可靠、可信。


电涡流传感器的分类
按照电涡流在导体内的贯穿情况,此传感器可分为高频反射式和低频透射式两类,但从基本工作原理上来说仍是相似的。
高频反射式电涡流传感器
高频(>lMHz)激励电流，产生的高频磁场作用于金属板的表面，由于集肤效应，在金属板表面将形成涡电流。与此同时，该涡流产生的交变磁场又反作用于线圈，引起线圈自感L或阻抗ZL的变化，其变化与距离、金属板的电阻率ρ、磁导率μ、激励电流i，及角频率ω等有关，若只改变距离δ而保持其他系数不变，则可将位移的变化转换为线圈自感的变化，通过测量电路转换为电压输出。高频反射式涡流传感器多用于位移测量。

传感器经常作为自动化产品的一部分，在我们日常生产生活中扮演着重要角色。它是现代科技的前沿技术，其水平高低也是衡量一个国家科技发展水平的重要标志之一。市面上的传感器多种多样，玲琅满目，可供我们选择的有很多。电感涡流传感器等众多高性能传感器，被大量应用在各行各业。特别是机床行业，以及汽车制造等行业更是应用广泛，是国内外公认的具有发展前途的高技术产业。


在高速旋转机械和往复式运动机械的状态分析，振动研究、分析测量中，对非接触的高精度振动、位移信号，能连续准确地采集到转子振动状态的多种参数。如轴的径向振动、振幅以及轴向位置。从转子动力学、轴承学的理论上分析，大型旋转机械的运动状态，主要取决于其核心—转轴，而电涡流传感器，能直接非接触测量转轴的状态，对诸如转子的不平衡、不对中、轴承磨损、轴裂纹及发生摩擦等机械问题的早期判定，可提供关键的信息。电涡流传感器以其长期工作可靠性好、测量范围宽、灵敏度高、分辨率高、响应速度快、抗干扰力强、不受油污等介质的影响、结构简单等优点，在大型旋转机械状态的在线监测与故障诊断中得到广泛应用 。
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990振动传感器主要用于离心式空气压缩机或小型泵、电机或风扇的原始设备制造商（原始设备制造商），这些制造商喜欢提供简单的4至20 mA比例振动信号作为其机械控制系统的输入。该变送器是一个2线环供电设备，可接受3300 NSV*近贴探头及其匹配的延长电缆的输入（5 m和7 m系统长度选项中提供）。发送器将信号调节为适当的峰间振幅工程单位，并将该值作为比例4至20 mA的工业标准信号提供给控制系统，在控制系统中发生机械保护报警逻辑。​

本特利振动探头330905-00-10-10-02-00，美国BENTLY探头，本特利探头；​

本特利Bently探头，NSV探头，公制，振动探头
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本特利Bently探头，NSV探头，公制，位移探头
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本特利Bently探头，NSV探头，公制，振动探头
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本特利Bently延伸电缆，NSV延长电缆
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本特利Bently变送器，NSV系列
991-01-XX-01-CN MOD:284318-01
991-01-XX-01-00 MOD:288865-01
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​冷却塔是用水作为循环冷却剂，从一系统中吸收热量排放至大气中，以降低水温的装置；其冷是利用水与空气流动接触后进行冷热交换产生蒸汽，蒸汽挥发带走热量达到蒸发散热、对流传热和辐射传热等原理来散去工业上或制冷空调中产生的余热来降低水温的蒸发散热装置，以保证系统的正常运行，装置一般为桶状，故名为冷却塔。


冷却塔是集空气动力学、热力学、流体学、化学、生物化学、材料学、静、动态结构力学，加工技术等多种学科为一体的综合产物。水质为多变量的函数，冷却更是多因素，多变量与多效应综合的过程 


冷却塔主要应用于空调冷却系统、冷冻系列、注塑、制革、发泡、发电、汽轮机、铝型材加工、空压机、工业水冷却等领域，应用多的为空调冷却、冷冻、塑胶化工行业。


汽轮机也称蒸汽透平发动机，是一种旋转式蒸汽动力装置，高温高压蒸汽穿过固定喷嘴成为加速的气流后喷射到叶片上，使装有叶片排的转子旋转，同时对外做功。汽轮机是现代火力发电厂的主要设备，也用于冶金工业、化学工业、舰船动力装置中。


汽轮机是能将蒸汽热能转化为机械功的外燃回转式机械。来自锅炉的蒸汽进入汽轮机后，依次经过一 系列环形配置的喷嘴和动叶，将蒸汽的热能转化为汽轮机转子旋转的机械能。蒸汽在汽轮机中，以不同方式进行能量转换，便构成了不同工作原理的汽轮机。


汽轮机种类很多，根据结构、工作原理、热力性能、用途、气缸数目的不同有多种分类方法。
按结构
有单级汽轮机和多级汽轮机；各级装在一个汽缸内的单缸汽轮机，和各级分装在几个汽缸内的多缸汽轮机；各级装在一根轴上的单轴汽轮机，和各级装在两根平行轴上的双轴汽轮机等。
按工作原理
有蒸汽主要在各级喷嘴（或静叶）中膨胀的冲动式汽轮机；蒸汽在静叶和动叶中都膨胀的反动式汽轮机；以及蒸汽在喷嘴中膨胀后的动能在几列动叶上加以利用的速度级汽轮机。
按热力特性
有凝汽式、供热式、背压式、抽汽式和饱和蒸汽汽轮机等类型。凝汽式汽轮机排出的蒸汽流入凝汽器，排汽压力低于大气压力，因此具有良好的热力性能，是为常用的一种汽轮机；供热式汽轮机既提供动力驱动发电机或其他机械，又提供生产或生活用热，具有较高的热能利用率；背压式汽轮机的排汽压力大于大气压力的汽轮机；抽汽式汽轮机是能从中间级抽出蒸汽供热的汽轮机；饱和蒸汽轮机是以饱和状态的蒸汽作为新蒸汽的汽轮机。
按用途
可分为为电站汽轮机、工业汽轮机、船用汽轮机等。
按汽缸数目
可分为单缸汽轮机、双缸汽轮机和多缸汽轮机。
其他
另外还可按照蒸汽初压（低压、中压、高压、超高压、亚临界、超临界、超超临界）、排列方式（单轴、双轴）等进行分类。


汽轮机通常在高温高压及高转速的条件下工作，是一种较为精密的重型机械，一般须与锅炉（或其他蒸汽发生器）、发电机（或其他被驱动机械）以及凝汽器、加热器、泵等组成成套设备，一起协调配合工作。


由转动部分和静止部分两个方面组成。转子包括主轴、叶轮、动叶片和联轴器等。静子包括进汽部分、汽缸、隔板和静叶栅、汽封及轴承等。
汽缸
汽缸是汽轮机的外壳，其作用是将汽轮机的通流部分与大气隔开，形成封闭的汽室，保证蒸汽在汽轮机内部完成能量的转换过程，汽缸内安装着喷嘴室、隔板、隔板套等零部件；汽缸外连接着进汽、排汽、抽汽等管道。
汽缸的高、中压段一般采用合金钢或碳钢铸造结构，低压段可根据容量和结构要求，采用铸造结构或由简单铸件、型钢及钢板焊接的焊接结构。
高压缸有单层缸和双层缸两种形式。单层缸多用于中低参数的汽轮机。双层缸适用于参数相对较高的汽轮机。分为高压内缸和高压外缸。高压内缸由水平中分面分开，形成上、下缸，内缸支承在外缸的水平中分面上。高压外缸由前后共四个猫爪支撑在前轴承箱上。猫爪由下缸一起铸出，位于下缸的上部，这样使支承点保持在水平中心线上。
中压缸由中压内缸和中压外缸组成。中压内缸在水平中分面上分开，形成上下汽缸，内缸支承在外缸的水平中分面上，采用在外缸上加工出来的一外凸台和在内缸上的一个环形槽相互配合，保持内缸在轴向的位置。中压外缸由水平中分面分开，形成上下汽缸。中压外缸也以前后两对猫爪分别支撑在中轴承箱和1号低压缸的前轴承箱上。
低压缸为反向分流式，每个低压缸由一个外缸和两个内缸组成，全部由板件焊接而成。汽缸的上半和下半均在垂直方向被分为三个部分，但在安装时，上缸垂直结合面已用螺栓连成一体，因此汽缸上半可作为一个零件起吊。低压外缸由裙式台板支承，此台板与汽缸下半制成一体，并沿汽缸下半向两端延伸。低压内缸支承在外缸上。每块裙式台板分别安装在被灌浆固定在基础上的基础台板上。低压缸的位置由裙式台板和基础台板之间的滑销固定。
转子
转子是由合金钢锻件整体加工出来的。在高压转子调速器端用刚性联轴器与一根长轴连接，此节上轴上装有主油泵和超速跳闸结构。
所有转子都被精加工，并且在装配上所有的叶片后，进行全速转动试验和动平衡。
套装转子：叶轮、轴封套、联轴节等部件都是分别加工后，热套在阶梯型主轴上的。各部件与主轴之间采用过盈配合，以防止叶轮等因离心力及温差作用引起松动，并用键传递力矩。中低压汽轮机的转子和高压汽轮机的低压转子常采用套装结构。套装转子在高温下，叶轮与主轴易发生松动。所以不宜作为高温汽轮机的高压转子。
整锻转子：叶轮、轴封套、联轴节等部件与主轴是由一整锻件削而成，无热套部分，这解决了高温下叶轮与轴连接容易松动的问题。这种转子常用于大型汽轮机的高、中压转子。结构紧凑，对启动和变工况适应性强，宜于高温下运行，转子刚性好，但是锻件大，加工工艺要求高，加工周期长，大锻件质量难以保证。
焊接转子：汽轮机低压转子质量大，承受的离心力大，采用套装转子时叶轮内孔在运行时将发生较大的弹性形变，因而需要设计较大的装配过盈量，但这会引起很大的装配应力，若采用整锻转子，质量难以保证，所以采用分段锻造、焊接组合的焊接转子。它主要由若干个叶轮与端轴拼合焊接而成。焊接转子质量轻，锻件小，结构紧凑，承载能力高，与尺寸相同、有中心孔的整锻转子相比，焊接转子强度高、刚性好，质量轻，但对焊接性能要求高，这种转子的应用受焊接工艺及检验方法和材料种类的限制。
组合转子：由整锻结构套装结构组合而成，兼有两种转子的优点。
联轴器
联轴器用来连接汽轮机各个转子以及发电机转子，并将汽轮机的扭矩传给发电机。现代汽轮机常用的联轴器常用三种形式：刚性联轴器，半挠性联轴器和挠性联轴器。


空气压缩机是一种用以压缩气体的设备。空气压缩机与水泵构造类似。大多数空气压缩机是往复活塞式，旋转叶片或旋转螺杆。离心式压缩机是非常大的应用程序。


空气压缩机（空压机）的种类很多。
1、按工作原理可分为三类：容积型、动力型（速度型或透平型）、热力型压缩机。
2、按润滑方式可分为无油空压机和机油润滑空压机。
3、按性能可分为：低噪音、可变频、防爆等空压机。
4、按用途可分为：冰箱压缩机、空调压缩机、制冷压缩机、油田用压缩机、天然气加气站用、凿岩机用、风动工具、车辆制动用、门窗启闭用、纺织机械用、轮胎充气用、塑料机械用压缩机、矿用压缩机、船用压缩机、喷砂喷漆用。
5、按型式可分为：固定式、移动式、封闭式。


容积式压缩机——直接依靠改变气体容积来提高气体压力的压缩机。
活塞式压缩机——是容积式压缩机，其压缩元件是一个活塞，在气缸内做往复运动。
回转式压缩机——是容积式压缩机，压缩是由旋转元件的强制运动实现的。
滑片式压缩机——是回转式变容压缩机，其轴向滑片在同圆柱缸体偏心的转子上作径向滑动。截留于滑片之间的空气被压缩后排出。
液体-活塞式压缩机——是回转容积式压缩机，在其中水或其它液体当作活塞来压缩气体，然后将气体排出。
罗茨双转子式压缩机——属回转容积式压缩机，在其中两个罗茨转子互相啮合从而将气体截住，并将其从进气口送到排气口。没有内部压缩。
螺杆压缩机——是回转容积式压缩机，在其中两个带有螺旋型齿轮的转子相互啮合，使两个转子啮合处体积由大变小，从而将气体压缩并排出。螺杆式空气压缩机中的螺杆压缩组件，采用新型数控磨床内部制造， 并配合在线激光技术，确保制造公差无比 。其可靠性和性能可确保 压缩机的运转费用在使用期内一直极低。调整压缩机、一体式压缩机和干燥剂系列都是L/LS系列压缩机中的新产品。
速度型压缩机——是回转式连续气流压缩机，在其中高速旋转的叶片使通过它的气体加速，从而将速度能转化为压力。这种转化部分发生在旋转叶片上，部分发生在固定的扩压器或回流器挡板上。
离心式压缩机——属速度型压缩机，在其中有一个或多个旋转叶轮（叶片通常在侧面）使气体加速。主气流是径向的。
轴流式压缩机——属速度型压缩机，在其中气体由装有叶片的转子加速。主气流是轴向的。
混合流式压缩机——也属速度型压缩机。其转子的形状结合了离心式和轴流式两者的一些特点。
喷射式压缩机——利用高速气体或蒸汽喷射流带走吸入的气体，然后在扩压器上将混合气体的速度转化为压力。