(1)22kw水泵對葉輪的需求：

　　·葉輪應有滿足的強度和鋼度;

　　·流道形狀為契合液體流動規則的流線型，液流速度分布均勻，流道阻力盡可能小，流道外表粗糙度較小;

　　·材料應具有較好的耐磨性;

　　·葉輪應具有杰出的靜平衡和動平衡;

　　·布局簡略，制作技術性好。22kw水泵的葉輪通常都是鑄造而成。

　　(2)22kw水泵葉輪的首要布局參數：

　　a.葉片準葉輪進、出口處的裝置角；

　　b.葉片數目；

　　22kw水泵葉輪的維修：葉輪的損壞方式通常為磨損或打壞，其緣由如下。

　　①葉輪不平衡或裝置不妥，發作沖突所造成的。

　　②因為22kw水泵軸曲折，泵軸與動力機軸不同心，軸承或填料磨損太多，使葉輪晃動，發作沖突。

　　③22kw水泵受泥沙、水流沖刷，磨損成溝槽或條痕。

　　④雜物被吸入葉輪中，打壞葉輪。

　　⑤發作汽蝕，發作蜂窩狀的空泛。

　　關于磨損太多、汽蝕嚴峻或被打壞的葉輪，通常應換新葉輪，并消除導致磨損或打壞的各種緣由。

　　在部分損壞(如溝槽、空泛等)仍可運用的情況下，可進行焊補。

　　操作方法是：將焊件置于炭火上加熱到600℃左右，在焊補處掛錫，再用氣焊火焰把黃銅棒溶到溝槽或空泛中。焊完后移去炭火，用石棉板掩蓋保溫，使其漸漸冷卻，以防發作裂紋，待冷卻后再修平或銼光外表。有時，也可用環氧樹脂砂漿修補葉輪，特別對泥沙較多而使葉片磨損嚴峻的當地，如果在整個被磨損的葉片上涂覆一層環氧樹脂砂漿，可收到比較好的作用。

　　修正后的22kw水泵葉輪應進行靜平衡試驗。

　　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.