22kw水泵

　　(1)22kw水泵对叶轮的需求：

　　·叶轮应有满足的强度和钢度;

　　·流道形状为契合液体流动规则的流线型，液流速度分布均匀，流道阻力尽可能小，流道外表粗糙度较小;

　　·材料应具有较好的耐磨性;

　　·叶轮应具有杰出的静平衡和动平衡;

　　·布局简略，制作技术性好。22kw水泵的叶轮通常都是铸造而成。

　　(2)22kw水泵叶轮的首要布局参数：

　　a.叶片准叶轮进、出口处的装置角；

　　b.叶片数目；

22kw水泵叶轮的维修：叶轮的损坏方式通常为磨损或打坏，其缘由如下。

　　①叶轮不平衡或装置不妥，发作冲突所造成的。

　　②因为22kw水泵轴曲折，泵轴与动力机轴不同心，轴承或填料磨损太多，使叶轮晃动，发作冲突。

　　③22kw水泵受泥沙、水流冲刷，磨损成沟槽或条痕。

　　④杂物被吸入叶轮中，打坏叶轮。

　　⑤发作汽蚀，发作蜂窝状的空泛。

　　关于磨损太多、汽蚀严峻或被打坏的叶轮，通常应换新叶轮，并消除导致磨损或打坏的各种缘由。

　　在部分损坏(如沟槽、空泛等)仍可运用的情况下，可进行焊补。

　　操作方法是：将焊件置于炭火上加热到600℃左右，在焊补处挂锡，再用气焊火焰把黄铜棒溶到沟槽或空泛中。焊完后移去炭火，用石棉板掩盖保温，使其渐渐冷却，以防发作裂纹，待冷却后再修平或锉光外表。有时，也可用环氧树脂砂浆修补叶轮，特别对泥沙较多而使叶片磨损严峻的当地，如果在整个被磨损的叶片上涂覆一层环氧树脂砂浆，可收到比较好的作用。

　　修正后的22kw水泵叶轮应进行静平衡试验。

　　Since the demand and repair suction centrifugal pump impeller

　　2012-06-20

　　(1) on the impeller demand

　　· impeller should meet the strength and rigidity;

　　· the runner shape to fit the liquid flow rules of distribution of streamline, velocity of liquid, flow resistance as small as possible, channel surface roughness smaller;

　　· material should have good wear resistance;

　　· impeller should have good static balance and dynamic balance;

　　· simple structure, good production technology. The impeller of the centrifugal pump is usually cast.

　　(2) the primary layout parameters self suction centrifugal pump impeller

　　A. blade impeller inlet, outlet quasi corner

　　B. the number of blades

　　Self suction centrifugal pump impeller repair

　　The damage mode of impeller is usually worn or broken, the reasons are as follows.

　　The impeller is not balance or device caused by improper, conflicts.

　　② because the pump shaft winding, the pump shaft and the power shaft misalignment or packing, bearing wear too much, so that the impeller sloshing, conflict.

　　③ by sediment, water erosion, wear into the grooves or striations.

　　The debris is sucked into the impeller, the impeller play bad.

　　The cavitation attack, attack the empty honeycomb.

　　On the impeller wear too much, cavitation serious or be broken, often should change new impeller, and eliminate the cause of all sorts of reasons is worn or broken.

　　In the part of the damage (such as trench, vague etc.) can still use case, for welding.

　　Method of operation is: the welding on a charcoal fire heating to 600 ℃, in welding at the hanging tin welding flame,then the brass rods dissolved into trenches or vague in. After welding to remove the charcoal, with asbestos boardcover insulation, it gradually cooling, to prevent the onset of crack, after cooling and then repair flat or smoothappearance. Sometimes, can also be used epoxy resin mortar repair impeller, especially to the blade wear sediment more severe local, if coated with a layer of epoxy resin mortar in the worn blades, can receive better effect.

　　Centrifugal pump impeller modified should be static balance test.