泵液压问题的解决办法.ppt

1、Hydraulic Problem Solutions液压问题的解决办法,Steven_Tianjin,Hydraulic Problem Solutions液压问题的解决办法,You may be able to increase or reduce the impeller diameter to get close to the pump B.E.P., but if this is not practical your best bet is to reduce the L3/D4 by going to a solid shaft or upgrading the power end

2、 to a larger shaft diameter. In some instances you can install a support bushing in the bottom of the packing stuffing box and install a mechanical seal closer to the bearings. Split seals are ideal for this conversion. In a few instances, changing the shaft speed will solve the problem. A closed lo

3、op system with a high system head is an ideal candidate for a variable speed pump 你可能能够增加或减小叶轮直径来得到接近泵的B.E.P,但如果这不是实际的,你最好的赌注是通过一个实心轴或提升功率端到一个更大的轴径来减小L3/D4.在一些情况下,你能够在填料箱的底部安装一个支撑套筒,和安装一个靠近轴承的机械密封.分离密封对于这个变换是理想的.在一些情况下,改变轴速将解决问题.有一个高系统压头的闭环系统对于变速泵是一个理想的侯选,Hydraulic Problem Solutions液压问题的解决办法,Insure

4、that you have enough NPSH for your application. If there is not enough an inducer or booster pump might solve the problem. Another section in this series explains Cavitation in great detail, and offers many solutions to the problem. 确保对你的应用有足够的NPSH.如果这里不足够,一个感应器或调压器泵可能解决问题.这个系列的另外一部分非常详细的解释了 “气穴现象”,

5、并且为这个问题提供了许多解决方法 An impeller, running too close to the pump cutwater will cause vibration and damage. An impeller tip to cutwater clearance of 4% (of the impeller diameter) in the smaller impeller sizes (to 14 inch/355 mm) and 6% in the larger sizes will solve this problem. This becomes a problem wi

6、th most self priming pumps and the only solution is to contact your pump supplier for his recommendation, if he has one. Repaired impellers sometimes experience this problem. 一个叶轮运行离泵的分水角太近将引起振动和损坏.叶轮尖到分水角的间隙为叶轮直径的4%,在小叶轮尺寸中(到14英寸/355毫米)和在更大尺寸中6%将解决这个问题.这变成大多数自吸泵有的一个问题,和仅有的解决方法是联系你泵的供应商询问他的建议,如果他有一个

7、的话.维修过的叶轮一些时候能经历这个问题,Hydraulic Problem Solutions液压问题的解决办法,Internal recirculation problems can be solved by either adjusting the open impeller or replacing the closed impeller with an alternative design. This problem was discussed in another volume of this technical series 内部在循环问题能够通过调整敞开叶轮或更换有选择设计的闭

8、式叶轮来解决.这个问题将在本系列的另外一卷中讨论 Air can get into a system through valves above the water line or flanges, but the easiest way for air to enter a system is through the stuffing box of a packed pump. The simplest solution is to replace the pump packing with a balanced O-Ring seal. If vortexing is the problem

9、, consult the Hydraulic Institute Manual for information on vortex breakers and proper piping layouts to prevent turbulence in the lines, and at the pump suction. 空气能够通过高出水线的阀或法兰进入系统,当最容易的空气进入系统方法是通过填料泵的填料箱.最简单的解决方法是用一个平衡的O圈密封代替泵的填料.如果涡流是一个问题,参考液压协会手册关于涡流断路器和恰当的管线布置来预防管线中紊乱的信息,和在泵的吸入侧,Hydraulic Prob

10、lem Solutions液压问题的解决办法,Water hammer is not very well understood by our industry, but we know how important it is to keep air out of the piping system. 水锤没有被我们的工业好好的理解,但我们知道它对于保持空气在系统以外是怎样的重要 It is good practice to use one size larger suction pipe and then use a reducer to connect the piping to the pump. Do not use concentric re