First, the role and structure of the shaft
        The role and power transmission shaft is driven by rotation of the pump impeller , shaft bearings for general use , one end of the coupling or pulley mounted impeller is fixed at the other end or in the middle . More slender shaft axial pump with rubber bearings and packing contact surface is plated with chrome or stainless steel sleeve lined to increase the wear resistance and corrosion resistance.

Second, the shaft overhaul
        After the pump running for some time , the shaft will be bent and worn , mainly due to the unbalanced impeller assembly , power machine shaft and chestnut shaft misalignment , pull the belt tight , bearing mounted askew, poor lubrication , so that the shaft is worn or early bent. This phenomenon , it should be timely maintenance to ensure proper operation of the pump , otherwise it will cause movement of the rotor imbalance and wear parts . After initial recognition bent shaft must be straightened or replaced.

Third, the role and structure of the impeller
        The function is to pump impeller power machine 's mechanical energy to water in the energy increases . By the impeller blades and hub components. Impeller has closed, semi-closed , open- points.

Fourth, the impeller overhaul
        Common causes impeller wear or broke the impeller imbalance or improper installation ; Because the shaft bent shaft with different power machine axis hearts were broken impeller , cavitation , resulting in a honeycomb of holes and so on. If the impeller wear too much or has broken, the general should be replaced with new impeller.

Fifth, the role and structure of pressurized water chamber
        The role of pressurized water chamber is rotating motion to eliminate the water and make it into pressure energy to the water outlet or sent to the next stage impeller. Centrifugal and mixed-flow pump pressurized water chamber is common spiral , called the volute . Usually with a single-stage volute suction , single-stage double -suction , multi-stage pumps in the open . Pressurized water from the pump volute chamber , guide vanes and other components.

Sixth, pressurized water chamber overhaul
        As the cold , too much pressure or improper installation and other reasons , it may make volute or guide vane cracking . Crack is not long , strict requirements of the site can be sealed at both ends of each drill a small hole crack , the crack is no longer expanding , as temporary solutions. Large cracks , sealing the site strict requirements should be hot and cold welding.

        In addition, the pump is running , you should pay close attention to the mouth rings , bearings, pipe, seal and other parts and equipment , found fault should be timely maintenance, to ensure the normal operation of the pump .