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柴油机防汛排涝泵

混流泵的工作原理
 
由于混流泵的叶轮外形介于离心泵叶轮和轴流泵叶轮之间，因此，混流泵的工作原理既有向心力又有升力，靠两者的综协作用，水则以与轴组成一定角度流出叶轮，经过蜗壳室和管路把水提向高处。
 
离心泵型号、品种规格及其变型产品在农用泵中是最多的。根据水流入叶轮的方式、叶轮几、泵本身能否自吸以及配套动力大小和动力品种等，离心泵有单级单吸离心泵、单级双吸离心泵、多级离心泵、自吸离心泵、电动机泵和柴油机泵等。
 
结构型式 轻小型离心泵为轴向吸入单级单吸悬架式离心泵，泵体后开门，出口位于中心向上，后盖为压嵌式，轴承体与泵体直接结合，泵脚位于泵体下方，轴承用黄油润滑，轴封分为软填料、机械密封、橡胶油封三种。叶轮均为闭式，传动分为联轴器传动和皮带传动两种。泵叶轮转向：从泵进口方向看，叶轮转向为顺时针，当泵与柴油机直联传动时，为逆时针。泵出口可装置手动泵，可去掉底阀，减少水力损失，并能使泵自吸。


The working principle of mixed flow pump
Because the impeller shape of the mixed flow pump is between the impeller of centrifugal pump and the impeller of axial flow pump, the working principle of the mixed flow pump has both centripetal force and lifting force. The combined action of the two forces makes water flow out of the impeller at a certain angle with the shaft, and the water is lifted to the high place through the volute chamber and pipeline.
The model, variety and specification of centrifugal pump and its variant products are the most popular in agricultural pumps. According to the way of water flowing into impeller, impeller number, whether the pump itself can self-priming and matching power size and power variety, the centrifugal pump includes single stage single suction centrifugal pump, single stage double suction centrifugal pump, multi-stage centrifugal pump, self-priming centrifugal pump, motor pump and diesel engine pump.
The structure type light and small centrifugal pump is axial suction single stage single suction suspension centrifugal pump. The pump body is open behind the door, the outlet is located in the center up, the rear cover is pressure embedded type, the bearing body and the pump body are directly combined, the pump foot is located under the pump body, the bearing is lubricated with butter, and the shaft seal is divided into three types: soft packing, mechanical seal and rubber oil seal. The impeller is closed type, and the transmission is divided into coupling drive and belt drive. Pump impeller turning: from the pump inlet direction, the impeller turning is clockwise, when the pump and diesel engine are directly connected, it is counterclockwise. The pump outlet can be equipped with manual pump, which can remove the bottom valve, reduce the hydraulic loss and make the pump self-priming.

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