In the water supply system, the pump is in regular operation, often due to various faults so that the pump can not work properly. Centrifugal pump common fault, the causes and solutions:
The pump is not on the water
(1) When the suction pipe of the water pump causes the air in the pipe to exist due to the downhill slope and the gas plug has formed, the water pump can not continuously absorb water and cause the water pump to not discharge water. When there is downhill, should adjust the slope, and timely discharge of the pump body and suction pipe air.
(2) Suction valve at the end of lax or damaged, so that the water pipe dissatisfied with water, or at the end of the valve and suction port blocked by debris, so that the end of the valve is not strict. When you confirm the above-mentioned failure should promptly clean up dirt, overhaul bottom valve, damaged should be replaced.
(3) at the end of the submerged depth of the valve will not cause water pump, should increase the depth of immersion in the water pipe.
(4) tank (tank) in the water level is too low will not pump the water, this time should check the influent water system, the water pressure is not enough; float valve, liquid level control valve, etc. Failure Should be timely adjustment of replenishment time (such as the use of low water at night when the replenishment), repair or replacement of the malfunction of the inlet valve.
2. Water pump to reduce the amount of In addition to check the depth of the submerged suction pipe, suction pipe downhill gas storage and other reasons, but also check the pump impeller seal ring is damaged, and promptly replaced.
3 pump bearing overheating When the pump is running, the bearing temperature should not exceed 60 ℃, when the bearing is short of oil or the pump and the motor shaft is not the same heart, the bearing clearance is too small, the packing pressed too tight, can cause bearing overheating. At this point, should be adjusted concentricity, fuel, adjust the packing gland tightness.
4. Pump running vibration and noise is too large.
Pump concentricity deviation is too large will have a greater vibration, and secondly should check the anchor bolts, the base bolts are tightened without loosening. On the requirements of the control of noise and vibration more stringent buildings should be added damping or vibration isolation device.
When the suction pipe depth is too large, the suction tank water level is too low, but also make the pump produce cavitation phenomenon and increase the pump noise.