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Impellers Wear-resistant High-performance Anti-corrosion High
Jul 14, 2017

Impellers cutting refers to the diameter of the processing Impellers to reduce the energy transferred to the system fluid. Impellers cutting is a very useful improvement measure for overly conservative designs or changes in pump capacity due to changes in system load. The Impellers cutting reduces the end speed of the Impellers and thereby directly reduces the energy delivered to the system fluid medium and reduces the flow and pressure generated by the pump. The centrifugal pump similarity law provides a theoretical relationship between the Impellers size and the pump output under constant pump speed conditions. The same time as the above-

In practical applications, these relationships are not very precise due to the non-linearity of flow; however, the basic role of Impellers cutting on flow, indenter and power is still valid. For example, a 2% reduction in Impellers diameter would result in a decrease in flow rate of about 2%, a 4% pressure drop and a 6% power drop. For relatively small changes, the law of similarity can be used as a rough judgment, and the final result of the Impellers cutting depends on the variation of the system curve and pump performance.

The main benefit of reducing the Impellers size is to reduce operating and maintenance costs. The energy wasted by bypass lines and throttle valves, and the energy diffused through system noise and vibration are less. The energy saving of the Impellers cutting is essentially proportional to the reduced cube of the diameter. Because the motor and the pump there is an efficiency problem, so the actual power consumption of the motor will be higher than the fluid power.

In addition to energy saving, Impellers cutting can also reduce the piping system, valves and piping system wear. Fluid flow generated by the pipeline system vibration will lead to pipeline welding parts and mechanical joints of fatigue. With the use of time, welds and joints will be cracked and loose, resulting in leakage of the system and then had to shut down maintenance. From the design point of view, too much fluid energy is not desirable. The spacing and selection of the pipe supports are normally carried out according to the static load of the pipes and fluids they can withstand, the pressure load from the inside of the system, and the thermal expansion (in thermal power applications) caused by temperature changes. Excessive fluid energy generated by the vibration load design is not taken into account, it will lead to system leakage, downtime and additional maintenance.

If the motor is still in the original state, the motor is in light load state, the motor efficiency is low, we according to the actual needs of the flow head, cutting the pump Impellers diameter, the motor shaft power in accordance with the Impellers three times down, so that supporting The motor is in an efficient area. We will be the original motor rated power remanufacturing down power designed to meet the load characteristics of the efficient operation of high efficiency motor. Motor re-manufacturing, is the inefficient motor through the redesign, replacement parts and other methods, and then create a high-efficiency motor or for a specific load and operating conditions of the system energy-saving motor.

The same time as the above-

For the original pump matching motor we effectively use the original stator and rotor, the original core down power designed to cut the matching power after the efficient motor, redesigned winding to reduce the stator copper consumption, re-dipping, improve the original motor life, switch to efficient Fans and new bearings. Use the original base, end cover to ensure that the size of the same.

Impellers blade corrosion causes and anti-corrosion strategy First of all from the media PH, temperature, flow rate, salt concentration, microbial content, dissimilar metal combination and medium wear angle, etc., the impact of Impellers blade corrosion of various factors, combined with modern anti- In a reasonable choice of materials, manufacturing processes and ZS anti-corrosion coating brushing and other factors comprehensive analysis of corrosion resistance.

 There are two kinds of wear and corrosion caused by the common action of the Impellers blade friction, the transmission medium and the relative motion of the Impellers blade surface. The shear stress of the moving medium on the blade surface and the high-speed flow wear friction make the metal loss of the Impellers blade, Here is recommended two kinds of anti-corrosion coating, a leaf blade in the liquid slurry friction corrosion, the choice is ZS-911 wear waterproof coating; one is in the dust smoke friction corrosion, the choice is ZS-1041 flue gas corrosion coating, Two high-performance heavy-duty high hardness coating.