Ｄ、限位器D, limiting device限位器为一个底部带限位板和流通通道的短节，接在定子的尾部，其作用是施工作业时给转子限位以防止下入过头而失去作用和杆柱脱落时防止杆柱掉入井底。The limiting device is a short section with bottom limit plate and distribution channel, which is
莫诺螺杆泵配件
Ｄ、限位器D, limiting device限位器为一个底部带限位板和流通通道的短节，接在定子的尾部，其作用是施工作业时给转子限位以防止下入过头而失去作用和杆柱脱落时防止杆柱掉入井底。The limiting device is a short section with bottom limit plate and distribution channel, which is connected to the tail of the stator. Its function is to limit the rotor to the rotor during ctruction1, so as to prevent it from falling into the overhead and lose its function and prevent the rod from falling into the bottom when the rod string falls off.
Ｅ、抽油杆扶正器E, sucker rod centralizer抽油杆扶正器由心轴和扶正筒组成，它接在两根抽油杆之间，被卡在两个抽油杆接箍之间。心轴也就是一要极短的抽油杆短节。扶正筒是一个内孔比心轴大１ＭＭ左右的空心塑料筒，外部有四个略比油管内径小的扶正翼，采取浇注成型。扶正筒可以围绕心轴转动，防止抽油杆旋转时与内壁接触而磨蚀油管，又可以让流体通过。The sucker rod centralizer is comed of the heart shaft and the upright cylinder, which is connected between the two sucker rods and is stuck between the two sucker rod hoops. The axis of the heart is also an extremely short rod short section. The centering cylinder is a hollow plastic tube inner hole Bixin shaft around 1MM, external four slightly smaller than the diameter of the tubing centralizer wing, adopt casting. The centralizer can revolve around the axis to prevent the sucker rod from touching the inner wall when it rotates, and it can also let the fluid pass through.
污泥输送泵多用于排放粘度较高的输送机械。利用叶轮的水利设计减少堵塞现象;轴和油室的密封紧密;安装方便减少了操作的繁琐，并且使用方便;易于维护。
污泥输送泵不仅在生活中使用方便，使用寿命也长。在规定条件下，故障运行时间不小于10000h，整机使用寿命不小于20年。
污泥输送泵的发展是因为其自身的技术特点及结构的合理，给我们带来很大程度的方便。
单螺杆泵类别： 泵从大类分为两种：容积泵和流量泵。 容积泵：通过泵的传动部件形成的空腔转运流体，传动部件的转动移出流体分为往复式和旋转式两大类 流量泵：带给流体动能，流体转运和循环；不允许干运行，液面以下运转单螺杆泵特点： 1、在低转速工况下压力稳定 2、低必须气蚀余量 3、可输送含大颗粒的介质 4、可输送含磨蚀性的介质 5、压力可至48B 6、流量稳定、可用于计量加药 7、流量对介质的粘度高低影响不大 8、只有一处轴封、便于检修
（作者： 来源：）
