Centrifugal pump water irrigation is not full. Centrifugal pump insufficient water causes and maintenance

cause of issue:

Pump at the end of the valve closed lax or serious water pump suction leaks.

Maintenance methods:

First of all, through seeing, hearing to determine the approximate location of the fault occurred. Then, the pump suction pipe pulled out from the water for inspection? Shu H 绻? Pry? Mei chase Ч Torr Zhanxia Xiamen should be demolished at the end of valve repair or replacement; if the pump suction pipe leakage, the application of light inspection? Shun Feng 咛 宓 Mu ┧ class? Pipe wall leaks should be taken to repair the blockage or replacement methods; suction pipe joints at the leak, it should be taken with a wrench to tighten the flange bolts or replace the contact skin Tighten the pad after the method of repair.

Insufficient water pump out:

cause of issue:

① pump head lift more than the rated lift.
② pump speed is not complete or due to belt slip caused by low speed.
③ pump suction is too high.
④ pump at the end of valve opening is not enough or check valve is blocked.
⑤ suction pump, water leakage serious pipeline.
⑥ pump pipe and impeller partial blockage or impeller defect.

Maintenance methods:

① reinstall the pump, and appropriate to reduce the installation of the pump height, so that the actual lift is less than the rated head of the pump. If you can not rule out the fault, should be based on the actual situation on the scene, through the calculation, re-election centrifugal pump.
② First of all, check whether the power unit of pump group matches with the pump (main technical parameters such as power, speed, etc.). If not, according to the technical data marked on the pump nameplate, configure the power unit rationally ), To meet the pump power, speed requirements. Second, check the power transmission pump group, if it is due to drive belt slippage caused by low pump speed, you should stop the pump to remove dirt on the drive belt, and re-lap and adjust the belt tension as required.
a. Drive belt installation requirements Pump shaft to the power machine (diesel engine) axis spacing of 1.5 to 3.0 meters is appropriate, and should ensure that both parallel to the axis, available cable method for inspection. If the pull line is equidistant from the sides of the two pulleys, the two axes are parallel; if not parallel, they should be corrected. Otherwise, the work of the belt easy to fall off, both affect the work, but also unsafe.
b. The installation of the drive belt When installing the belt, the tight edge of the belt should be below to increase the wrap angle of the belt, to achieve the purpose of improving the transmission efficiency and prolonging the service life.
③ parking after reinstall the pump, and appropriate to reduce the pump installation height.
④ After stopping the first check the pump at the end of the valve state, if the bottom valve is not open enough degree or open obstacles, you should open the end of the valve or replace the new bottom valve. Second, check the working status of check valve, in the event of blockage or damage, you should remove the removal of obstruction or replace the new check valve.
⑤ parking after the light test? Counseling? Chennai? ⒊ 鏊? 埽? 绻? Gun 鼙 诖 beta ┢ 虿 虿 fan ⌒ Yi Gou egg box? 恍 deer 艿 椒 pepper ǎ locust 绻 涌 wall Chung 诖 β ┢虿 ∮ ∮ 馐〗〗〗〗〗 寂 勇 勇 唤 唤 唤 唤 唤 唤 唤 唤 舻 舻 舻 舻 舻 br br> Things. Then remove the pump check, if the impeller is winding debris, you should remove the impeller and the winding debris removed; if the pump cavitation phenomenon, resulting in partial wear impeller defects, the impeller should be repaired or replaced.
Local damage to the impeller can be repaired either by welding or by applying a layer of epoxy resin mortar over the worn blades to give better control. In addition, the repaired impeller should generally be static equilibrium test.