Pump shaft action and construction

The role of the pump shaft is to transmit power and drive the pump impeller to roll, the pump shaft is generally supported by bearings, one end is equipped with a coupling or pulley, the impeller is fixed in the other end or in the middle. Axial flow pump shaft is more slender, and the contact surface of rubber bearing and packing is plated with chromium or inlaid with stainless steel sleeve, in order to increase wear resistance and corrosion resistance.

Pump shaft inspection

After the pump runs for a period of time, the pump shaft will overbend and wear, the main reason is the impeller assembly imbalance, the power machine shaft and chestnut shaft different center, belt pull too tight, bearing installation skew, poor lubrication, so that the early wear or bending of the pump shaft. After this phenomenon occurs, it should be checked in time to ensure the normal operation of the pump, otherwise it will cause the imbalance of the rotor and wear of the information department. After the preliminary confirmation of the pump shaft bending, it must be straightened or replaced.

Impeller action and structure

The function of water pump impeller is to transfer the mechanical energy of the power machine to feed water and increase the energy of water. The impeller consists of a blade and a hub. Impellers are divided into three types: interlock, semi-interlock and open.

QW series non-blocking mobile submersible pump

Impeller inspection

Impeller wear or break up the general cause of impeller imbalance or improper installation; Because of the bending of the pump shaft, the pump shaft and the power machine shaft are different, the impeller was broken, anger corrosion, honeycomb floating. If the impeller wear too much or have broken, generally should be replaced with a new impeller.

The action and structure of pressurized water chamber

The role of the pressurized water chamber is to eliminate the rotating motion of the water and convert it into pressure energy to send the water to the outlet pipe or the next stage impeller. The common pressurized water chamber of centrifugal pump and mixed flow pump is spiral shape, called vortex housing. The vortex case is generally single - stage suction, single - stage double - suction, multi - stage medium - open pump. The water pump chamber is composed of a vortex housing and a guide vane body.

Chamber inspection

Cracks may occur in the vortexes or guide vanes due to heat and cold, excessive pressure or improper installation. Where the crack is not long and the sealing requirement is not strict, a small hole can be drilled at both ends of the crack to prevent the crack from expanding.

As a temporary solution. The parts with big cracks and strict sealing requirements should be repaired by cold and hot welding.

In addition, in the running process of the pump, close attention should be paid to the mouth ring, bearing, bending pipe, shaft seal and other parts and devices, failure should be detected in time to ensure the normal operation of the pump.