he impeller of the feed pump of the filter press is divided into primary impeller, secondary impeller and auxiliary impeller, among which the primary and secondary impeller play the role of guiding and conveying liquid, and the auxiliary impeller plays the role of sealing. The wear of primary and secondary impellers is caused by long-term use, which affects the efficiency of the pump. It is necessary to change new parts. The wear of secondary impellers is less and the service life is long, which usually does not need to change.
Filter press feed pump impeller
Under one of the following conditions, a new impeller shall be replaced:
1、 Impeller cracks or cracks on the surface.
2、 There are many holes on the impeller surface due to corrosion, erosion or cavitation.
3、 Impeller's mouth ring hub has serious eccentric wear phenomenon, which has no repair value.
4、 The thickness of impeller cover plate and blade affects the mechanical strength.
After the new impeller is bought, first check the appearance of the impeller, whether it is flat, whether there are sand holes, cracks, etc., to ensure that the new impeller has no quality problems. Secondly, the dynamic balance experiment should be stopped to ensure that the impeller will not show deflection after changing and the pump will not show serious vibration. Since the customers are not equipped with professional experimental equipment, the impeller parts have done equilibrium experiments before leaving the factory to ensure the normal operation of the customers after installation.
To change the impeller, first remove the pump and remove the damaged old impeller. It should be noted that the reverse thread used to fix the filter press pump impeller on the pump shaft is opposite to the rotation direction of the water pump. The benefit is that the rotation is more and more tight. When disassembling and installing the impeller, it must be operated in the correct direction