Causes of impeller damage in multistage pumps

There are many reasons that can cause damage to the impeller of multistage pumps, users should stop the pump in time, according to the specific manifestations of the fault to narrow down the scope of the fault, through technical maintenance to solve and do the corresponding preventive measures, in the pump industry on a few common reasons and related handling measures to sort out, in order to improve the actual experience of customers with the pump, see below.

The reasons for damage to the impeller of multi-stage pumps are as follows.

1, impeller or mouth ring wear: common cause is multi-stage pump transport cavitation caused by a long time in the inhalation of solid impurities after the internal impeller and mouth ring by serious wear, mouth ring repair possibilities are not high, the need to replace the impeller in a timely manner. For the impeller with a slight degree of wear, can be repaired.

2, shaft seal device failure: usually caused by improper use, it is recommended that users in the maintenance of multi-stage pump also filler for replacement, while cleaning other parts. For the shaft sleeve that has been filled with filler feel out the groove, in addition to replacement, can also try to use welding repair after turning. In addition, when installing the packing ring must be aligned with the water seal hole, so as not to be blocked by the packing, so that the water seal lost.

3, multi-stage pump pump shaft problems: multi-stage pump shaft as long as it does not produce cracks and serious surface wear or bending, can be repaired and used. The bending amount of the shaft should not exceed 0.06mm, and should be straightened when the value is greater than that, preferably with a spiral press without heating.

4、Balance disk and balance ring due to excessive wear: the groove between the balance disk and balance ring due to wear needs to be ground flat, and shims should be added behind the balance ring to compensate for the reduced thickness. The shims must be even and flat, and should be replaced when there is too much wear.

5, multi-stage pump bearing body damage: bearing body has excellent mechanical strength, usually will not be damaged, but in the case of improper fit or poor device will be shaft hole grinding large, first boring machine will bearing hole boring large (to ensure concentricity), and then set set, set the outer diameter of the bearing hole with the bearing, inner diameter and bearing outer diameter with.

Above, the introduction of multi-stage pump impeller damage causes, the user can be targeted according to the corresponding failure to deal with the pump, the strict implementation of maintenance standards, do a good job of regular inspection, there are in advance to avoid a variety of failures. If you are interested in knowing more about other types of pumps such as screw pumps, pipe pumps, etc., you can continue to pay attention to zhaoquan pump industry.