【 Weak current College 】 pump not causation analysis---Power By 【 China power house network 】

A fles and there is air in the pump

1. water pump starts before irrigation water to meet enough, sometimes looks irrigation water from louver overflow, but did not turn the pump to drain the air completely, resulting in some air in pipes or pump.

2, and water pump contact fles level section of the application against the flow direction of the slope above the decline, connect one end of the pump inlet to the highest level, not completely. If tilted upwards, into the tube will ever left the air, reducing water and vacuum pumps, water-absorbing effect.

3. pump packing for long-term use has been worn or packing pressing too loose, causing a lot of water from the filler and the gaps in the shaft bushing out, the result is an external air from these internal clearance to enter the water pump, affecting water pumping.

4, the potential for long-term pipes, pipe wall underwater corrosion occurs after the hole, the water pump is declining, as these holes re-appear, air holes into the water from the DPP.

5 fles elbow crack, fles and pump connections appear tiny gaps are likely to make the air enters into the water.

2 pump speed is too low

1, human factors. Some users due to integral motor damage, randomly matched with another motor driven, resulting in traffic to small, lift low or no water.

2, mechanical failure of the pump itself. Impeller and pump shaft fastening nut loose or shaft bending deformation, causing many to move directly to the impeller and the pump body friction, or bearing damage, which may reduce the speed of the pump.

3, power machine maintenance problems. Motor burned by winding, excitation, maintenance winding turns, wire diameter, wiring methods change, or repair the fault does not completely exclude factors also makes the pump speed change.

Three suction is too large

Some water is relatively dark, some water surface relatively flat, while neglecting the permissible suction pump, thus producing less absorbent or non-existent on the water absorption is not. Want to know the suction port Department can build vacuum is limited, the absolute vacuum suction of approximately 10 m water column, while the pump is not possible to establish absolute vacuum. And spend big, easy vacuum pump water gasification, water pumps work. So each pump has its maximum allowable suction, generally between 3-8.5 m. Installation of pumps is not only convenient and simple graphs.

Four water inlet and outlet of resistance loss too large

Some users after a measurement, while water cistern or water tower to the surface of the vertical distance is slightly smaller than the pump lift, but mention water small or no water. The reason for this is often a pipe is too long, bend pipes, water flow pressure loss in piping is too large. The reason for this is often a pipe is too long, bend pipes, water flow pressure loss in piping is too large. General degree bends ratio of bending resistance, once bent pipe head loss about m per meter piping resistance makes the lift loss about m. In addition, some users are free to pump inlet/outlet pipe diameter, which is also on the head.

Five other factors

Bottom valve does not open. Is usually due to the pump on hold for too long, the bottom valve gaskets glued to death, no washers of bottom valve may rust.

Bottom valve clogged filter network; or bottom valve potential water sludge layer causing filter clogging.

Impeller wear. Impeller blades with long-term use, wear, affecting water pump performance.

Gate valve may be faulty or plug valves will cause traffic decrease or even tied on the water.

Export pipeline leakage may also affect water extraction.