Cavitation leads to the deterioration of pump performance, unstable operation of equipment, fatigue corrosion of metal surface materials, increased noise and vibration and other adverse consequences.
When the effective cavitation allowance of the water pump device is less than the necessary cavitation allowance of the water pump, and the local pressure in the pump is reduced to the saturated vaporization pressure at the liquid temperature, impurities in the liquid, tiny solid particles or gas nuclei existing in the gap of the liquid interface (liquid-solid interface) quickly grow into cavitation bubbles, which reach the high pressure area with the water flow and collapse rapidly due to the compression of the surrounding liquid. In the cavity collapse area, the metal surface is subjected to water hammer force, the frequency of which can reach tens of thousands of times per second, acting on a small area, so its stress can reach thousands of atmospheres. The frequent application of this large stress causes the plastic deformation and hardening of the metal surface layer, leading to local fatigue and microcracks, which promotes the development of cavitation. Metal parts are broken and peeled off. Cavitation may occur on the back and front of impeller blades, or between the outer edge of impeller and the wall of impeller chamber. Usually, pump cavitation reduces the flow, lift, power and efficiency of the pump, causes vibration and noise of the unit, shortens the service life of the equipment and affects the engineering safety. The situation is even more serious for pumps that take water from water with high sediment concentration.
Radisson imported water pump volute is heavy-duty 30-grade gray iron, durable and wear-resistant, with rubber grip. Heavy oil-filled 2-stage motor, 2900 rpm. Patented V-shaped cutting technology, with 365,438+03,200 cuts per minute, can grind impurities in household garbage such as towels and women's products into fine slurry with a diameter less than 5 mm, and the cutter head and cutter head are made of 440 stainless steel with hardness of 58HRC. The service life of permanently lubricated bearings exceeds 70,000 hours. Excellent material will avoid many unnecessary problems.