Pump heating:
Reason: damaged bearings; rolling bearings or bracket cover gap too small; pump shaft winding or two axis misalignment; tape is too tight; lack of oil or oily bad; impeller balance hole plug, the impeller out of balance, increasing the to the side of the thrust.
Cleaning method: replacement of bearings; removal of the rear cover, in between the bracket and the bearing seat installed gasket; investigation of pump shaft or adjust the two axes concentricity, appropriate adjustable loose belt tightness; add clean butter, butter accounted for about 60% of the bearings gap; scavenging balance hole blockage.
Insufficient flow:
This is because: dynamic speed does not support or the belt slipping, so that low speed; axial flow pump blade installation angle is too small; head is insufficient, the line is too long or pipeline with right angle bend; suction side; at the end of valve, pipe and impeller partial blockage or impeller incomplete; outlet pipe leakage grim.
Cleaning method: restore rated speed, remove grease belt, adjust belt tightness; tuned blade angle, reduce pump installation location, relationship of pipeline or to change the line of tortuosity; sealing water pump leak, tighten the packing; plug removal, replacement of the impeller; replacement of reducing leakage ring, blocking leaks.
Suction without water:
Reason is the pump body with air or gas into the water pipes, or closing valves lax irrigation water dissatisfaction, vacuum packing a serious leak, valve or shoot doors closed lax.
Cleaning method: first water pressure up, then pump filled with water, and then boot. Check the check valve is not tight, pipes, joints have no leakage phenomenon, such as the discovery of leakage, after removal of the joint at the joint lubricant or blending paint, and tighten the screws. View the pump shaft of the oil seal ring, such as severe wear should be replaced with new pieces. Pipeline leakage or leakage. May be installed when the nut is screwed too tight. If the leakage is not serious, can be in the place of leakage or leakage of cement, or coated with asphalt mixture of cement slurry. Temporary patch can be coated with some wet mud or soft soap. If the joints leak, tighten the nut wrench can be used, such as leakage serious, need to disassembly, replacement of a crack in the pipe; reduce the head, pump nozzle pressed into the underwater 0.5m.
Convulsion:
There are mainly the following reasons: the electric rotor imbalance; coupling poor contact; bearing wear and tear; rotating parts of the parts loosening, rupture; pipeline stent is not strong, and so on. Don't go to adjust, repair, reinforcement, straightening, replacing approach.
