Pumps often see troubleshooting tips, and more importantly the failure to grasp pump troubleshooting tips, you must know the pump works, structural configuration of the pump, and the necessary skills and mechanical maintenance of common sense, with this knowledge, you can not pump according to Under normal circumstances and can quickly determine the fault location. Pump troubleshooting and handling techniques specifically:
Pump stuck. Approach: Hand drive coupling inspection, disintegration inspection, if necessary, to eliminate static and dynamic part of the fault.
2. The pump is not drained, insufficient pump (or the gas in the pump is not exhausted). Approach: re-irrigation pump;
Pump turned wrong. Approach: check the direction of rotation;
Pump speed is too low. Approach: check speed, increase speed;
Clogged filter, the bottom valve is not working. Approach: Check the filter to eliminate debris;
Suction height is too high, or suction sump vacuum. Approach: reduce the suction height; check the suction tank pressure.
3. The pump is drained and interrupted. Cause: The suction line leaks. Approach: Check the suction side of the pipe connections and stuffing box seal situation;
Suction side of the pump gas is not discharged finish. Approach: Requires re-irrigation pump;
Suction side suddenly blocked by foreign bodies. Approach: Stop pumping foreign matter;
Inhale a lot of gas. Approach: Check whether the whirlpool inlet, submerged depth is too shallow.
4 lack of traffic. Reason: System static head increased. Approach: check the liquid height and system pressure;
Resistance loss increases. Approach: Check the pipeline and check valve and other obstacles;
Housing and impeller wear ring wear too much. Treatment: replacement or repair wear rings and impeller;
Other parts of leakage. Approach: check the seal and other parts;
Pump impeller clogged, worn, corroded. Treatment: cleaning, inspection, exchange.
5. Lift enough. Reason: Impeller mounted anti (double suction wheel). Approach: check the impeller;
Liquid density, viscosity and design conditions do not match. Approach: Check the physical properties of liquids;
Operation flow too much. Approach: reduce traffic.
6. Pump vibration or abnormal sound. Reason: The vibration frequency is 0 ~ 40% working speed. Too large bearing clearance, loose bearings, impurities in the oil, bad oil (viscosity, temperature), blistering due to air or process fluid, poor lubrication, bearing damage. Treatment: check, take appropriate measures, such as adjusting the bearing clearance, remove impurities in the oil, replace the new oil;
Vibration frequency of 60% -100% of the working speed, or seal gap is too large, loosening ring, seal wear. Approach: check, adjust or replace the seal;
Vibration frequency of 2 times the working speed, misalignment, loose coupling, seal friction, shell deformation, bearing damage, bearing resonance, thrust bearing damage, shaft bending, poor cooperation. Approach: check, take appropriate measures to repair, adjust or replace;
Vibration frequency of n times the working speed. Pressure pulsations, misalignment, shell deformation, seal friction, pedestal or foundation resonance, piping, machine resonance; reinforcement of foundation or piping; very high vibration frequency. Shaft friction, seals, bearings, imprecise, bearing jitter, poor shrink fit and so on.
7. Bearing fever. Reason: Scraping of bearing pads does not meet the requirements. Remedy: Repair bearing pads or replace.
Bearing clearance is too small. Approach: re-adjust the bearing clearance or scratch research;
Lack of oil, poor oil quality. Approach: increase the amount of oil or replace the oil;
Poor bearing assembly. Approach: Check the bearing assembly as required to eliminate unmet requirements;
Cooling water circuit. Approach: check, repair;
Bearing worn or loose. Approach: repair bearing or scrapped.
If the pine association, compound the relevant bolts; pump shaft bending. Treatment methods: correction of pump shaft;
Oil ring deformation, oil ring can not be rotated, with no oil. Approach: update rejection oil ring;
Poor coupling or axial clearance is too small. Approach: Check the alignment and adjust the axial clearance.
8 shaft seal fever. Cause: The packing is too tight or rubbed. Approach: relax packing, check water seal tube;
Water ring seal and water pipe misplaced. Approach: re-check alignment;
Rinse, poor cooling. Processing method: check flushing cooling circulation tube;
Mechanical seal is faulty. Approach: Check the mechanical seal.
9. Large rotor movement. Reason: Improper operation, operating conditions away from the pump design conditions. Approach: Strict operation, the pump is always running near the design conditions;
The balance is not smooth. Approach: clear balance pipe;
Balance plate and balance plate material substandard. Approach: Replace the material to meet the requirements of the balance plate and balance plate seat.
