Rotor pump in the use of the process, must have an understanding of the basic situation of the lobe pump, the following is Ace lobe pump for you to sort out the causes of common failures of the lobe pump, I hope it will help you!
Exc essive current in lobe pumps can be caused by the following: high outlet pressure. The outlet pipeline should be checked for blockage and suitable outlet valve opening; excessive melt viscosity; poor shaft seal assembly; shaft or bearing wear; and motor failure.
The rot or pump has no flow, which may be caused by the following reasons: the rotor rotates in the opposite direction. The direction of rotation of the rotor is very important for lobe pumps, the direction of rotation is reversed the inlet of the pump becomes the outlet, the outlet becomes the inlet, then the outlet will naturally not have media outflow. Check the direction of rotation and correct the wrong direction according to the sign on the pump; close the pipeline valve on the suction or discharge side. Check whether the suction or discharge side pipeline valve is closed, if closed, open the valve; no media or low pressure at the inlet. Although the lobe pump has a strong self-priming function, but there are certain limits, too low liquid level, but also the lobe pump can not suck liquid resulting in no flow of the pump; safety valve is not closed tight; viscosity is too high, the pump can not bite material.
Sudden stoppage of the lobe pump may be caused by: power failure; motor overload protection; coupling damage; high outlet pressure and interlock reaction; abnormal bite into the pump; shaft and bearing sticking together and jamming.
Insufficient pump flow in lobe pumps can be caused by: low inlet pressure. Check the inlet pipeline to bring the pressure up to the specified requirements, otherwise cavitation may occur; blocked inlet pipeline; serious rotor wear and leakage; safety valve problems. The safety valve should be checked for poor sealing; the speed is too low; the viscosity is too low. The working range of the pump needs to be checked and the pump should be reselected if necessary.
lobe pumps with abnormal vibration noise may be caused by: large eccentric coupling or poor lubrication; gas in the pump; motor failure; abnormal reducer; poor installation at the shaft seal; shaft deformation or wear.