水泵不出水的启事(国外英文资料).doc

水泵不出水的原因(国外英文资料)Analysis of the cause of the water pumpThe suction hose and the pump have air(1) before starting the pump not satisfied enough, water sometimes look of irrigation water from vent overflow, turn the pump shaft to hand in the air but not fully discharge, caused a few remaining in the air inlet pipe or the pump body.(2) contact with the water pump inlet pipe under horizontal flow direction of the application of more than 0.5% of the down slope, connect one end of the water pump imported as the highest, dont completely level. If up, the air will remain in the water pipe, reducing the vacuum in the water pipes and pumps and affecting the absorption of water.(3) pump packing for long-term use have wear or too loose, causing a lot of water spewing from the clearance between the pump shaft sleeve and packing, as a result, the external air from entry to the interior of the pump, the clearance affects the water.(4) the inlet pipe because of long-term potential, underwater pipe wall corrosion holes, water pump the water falling after work, when the hole above the water, the air enters from the hole pipe within the DPP.(5) a crack in the inlet pipe, a small gap between the inlet and pump connection, and the possibility of bringing air into the intake.Low water pump speed(1) human factors. Some users were randomly paired with an electric motor for damage to the original motor, resulting in low volume, low lift, and no water.(2) mechanical failure of the pump itself. Impeller and the pump shaft fastening nut loose or pump shaft bending deformation, move more, cause impeller directly with the pump body friction, or bearing damage, are likely to reduce the speed of the pump.The engine will not be repaired. Motor winding burned, loss, and maintenance of winding turns, wire diameter, the change of the wiring method, or maintenance of the fault is not completely ruled out factors also can make water pump speed change.The pump suction is too bigSome water deep, some of