Comparison of Rotor Pump, Centrifugal Pump and Screw Pump and Fault Analysis

Rotor pump and centrifugal pump 1, the centrifugal pump in the gas into the pump chamber, running very unstable, greatly reduced efficiency, pump vibration, cavitation serious. Rotor pump can be very good gas, liquid and solid mixed delivery. 2, centrifugal pump speed is generally high, thousands of revolutions per minute. Shear medium to a large; Rotor speed is generally 600 rpm per minute, the blade spiral streamlined design, to ensure no pulse and vibration, to achieve non-shear transfer. 3, Centrifugal pump transport medium, once the media becomes thick, the flow or pressure will have a sharp decline in the situation, the rotor pump is more suitable for high viscosity, solid content with a large medium transport. Rotor pump and single screw pump comparison 1, the rotor pump can run dry, suddenly cutting material or operating errors is particularly important to prevent damage to the pump to ensure safe operation. 2, the rotor pump is small, is one-third of the installation area of ​​a single screw pump, reducing the scope and cost of civil engineering. 3, the rotor pump in the case of not dismantling the pipeline, online maintenance can be achieved, convenient and quick, reducing downtime. 4, the rotor pump non-squeeze working principle, the shell can be adjusted design, extending the use of time, reducing the number of maintenance, saving spare parts costs. Analysis of the failure of the cam rotor pump A, the pressure can not hit go, the flow decreased, the main reason is the rotor end, two wear plates and upper and lower shell serious wear and tear, the gap is too large. Solution: Achieve the desired flow rate by increasing pump speed. Adjust to reduce the gap between the rotor and the shell and wear plate to achieve the desired pressure. If the first two methods do not meet the required requirements, only replace the new rotor, wear plate, upper and lower shell. B, mechanical seal leakage, the main reason is the friction pair wear and rotor bearing clearance is too large, by replacing the new mechanical seals and bearings to solve the problem of leakage.