What should I do if the diesel engine pump unit fails to start, heats up, or lacks flow?
Anyone who has used a diesel engine pump must have encountered some minor problems. If the pump is not used in accordance with its operation method during the use process, there may be a variety of fault problems. At this time, you must first check it clearly before you know what kind of problem, different problem treatment methods It is also different.
1. The diesel pump can not start
First, check the power supply: whether the connection of the connector is firm; whether the switch is tightly connected; whether the fuse is blown; whether the three-phase power supply is missing. If there is an open circuit, poor contact, blown fuse, or phase loss, the cause should be identified and repaired in a timely manner. Second, check whether it is a mechanical failure of the pump itself,
Common reasons are: the packing is too tight or the impeller and the pump body are jammed and blocked by debris; the pump shaft, bearing, and leakage reduction ring are rusted; the pump shaft is severely bent. Remedy: loosen the packing and dredge the water trough; disassemble the pump body to remove debris and rust; remove the pump shaft calibration or replace the new pump shaft.
2. The pump of the diesel engine pump heats up
Cause: The bearing is damaged; the clearance of the rolling bearing or the bracket cover is too small; the pump shaft is bent or the two shafts are not concentric; the tape is too tight; the oil is lacking or the oil quality is not good; the balance hole on the impeller is blocked, the impeller is out of balance, increasing the direction Thrust on one side.
Remedy: replace the bearing; remove the rear cover, install a gasket between the bracket and the bearing housing; investigate the pump shaft or adjust the concentricity of the two shafts; properly loosen the tightness of the tape; add clean butter, butter accounts for the bearing About 60% of the inner gap; remove the blockage in the balance hole.
3. The pump flow of the diesel pump set is insufficient
This is because: the power speed is not matched or the belt slips, which makes the speed low; the installation angle of the axial flow pump blade is too small; the head is insufficient, the pipeline is too long or the pipeline has a right angle bend; the suction stroke is too high; And the impeller is partially blocked or impeller is defective; the water leakage of the outlet pipe is serious.
Remedy: restore the rated speed of the diesel engine water pump, remove the belt grease, and adjust the belt tightness; adjust the blade angle, reduce the installation position of the water pump, shorten the pipeline or change the curvature of the pipeline; seal the air leakage of the pump and compact the packing; Remove the blockage and replace the impeller; replace the leak reduction ring to block the leak.
