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Failure Analysis of Centrifugal Pump Not Watering
Centrifugal pump with its simple structure, easy maintenance, high efficiency and become the most widely used in agriculture, a pump, but also because sometimes mention the water and make you feel annoyed. Now on the water to mention the reasons for the failure to be analyzed. Inlet pipe and pump body air (1) Some users did not fill enough water before the pump started; sometimes it seems that the irrigation water has overflowed from the bleed hole, but did not turn the pump shaft air completely discharged, resulting in a little air still residue In the inlet pipe or pump body. (2) The horizontal section of the water inlet pipe in contact with the pump applies a descending gradient of 0.5% or more to the direction of the water flow, and the end connected to the pump inlet should be at the highest level, not the full level. If you tilt up, there will be trapped air inlet pipe, reducing the vacuum hose and pump, affecting water absorption. MechNet | For more information, please visit the website of China Machinery Experts. (3) The pump packing has worn or the packing pressure is too loose due to the long-term use, resulting in a large amount of water being ejected from the gap between the packing and the pump shaft sleeve. As a result, external air enters the interior of the pump from these gaps, affecting the lift. (4) Inlet pipe Due to long-term potential underwater, pipe wall corrosion holes, water pump work continues to decline, when these holes exposed water, the air from the hole into the water pipe. (5) cracks in the inlet pipe cracks, inlet pipe and pump connections appear tiny gaps, are likely to make the air into the inlet pipe. Pump speed is too low (1) Artificial factors. A considerable part of the user due to the original motor damage, it is coupled with another motor-driven, resulting in less traffic, low lift or even pumping the consequences of the water. (2) belt wear. There are many large pump away from the belt, because of long-term use, the belt wear and loose, there slippage, thereby reducing the pump speed. (3) improper installation. Two pulley center distance is too small or two axes are not parallel, tight belt mounted to the top, resulting in the wrapping angle is too small, the two pulley diameter calculation error and coupling shaft pump two eccentric eccentricity will result in Pump speed changes. (4) the pump itself mechanical failure. Loosening of the impeller and the shaft of the pump shaft or the deformation and bending of the shaft of the pump cause the impeller to move more, directly friction with the pump body, or bearing damage, which may reduce the speed of the pump. (5) Power engine maintenance does not record. Motor due to the winding burned, and loss of magnetism, the maintenance of the winding turns, diameter, connection method changes, or maintenance failure is not completely ruled out factors also make the pump speed change.