News Digest:submersible sand pump, dredge pump for sale, china slurry pump parts, What are the dangers of cavitation to submersible sand pump. Submersible sand pump, also known as submersible sediment pump, submersible mud pump, submersible sand pump, submersible suc
What are the dangers of cavitation to submersible sand pump
Submersible sand pump, also known as submersible sediment pump, submersible mud pump, submersible sand pump, submersible suction pump, submersible pump, underwater dredging pump, etc., China Do Pump is a manufacturer of sand pump. dredge pump, electric submersible sand pump and hydraulic submersible dredge pump with relative dredging equipment.
During the use of submersible sand pumps, it has been found that parts have a short life due to cavitation. Many people don't understand what cavitation is, and they don't know that cavitation can damage submersible sand pumps. Let's first introduce what is cavitation. eclipse.
Cavitation is when the local pressure of the liquid (which can be water, oil, etc.) in the flow channel (which can be pumps, turbines, rivers, valves, propellers, and even human and animal blood vessels) drops to a critical pressure (generally close to the vaporization pressure) The general term for the accumulation, flow, splitting and collapse of gas bubbles in liquids.
Cavitation occurs when the suction vacuum is greater than the allowable suction vacuum. It mainly occurs at the outer edges of the impeller blades and cover plates, pump casings or impellers, and does not occur at the blade inlet. For example, when the flow is greater than the design flow, it occurs at the blade inlet near the front of the blade of the front cover. When the pressure at the inlet of the impeller drops to the saturated vapor pressure of the liquid being sent at the working temperature, the liquid will partially vaporize, and the generated bubbles will enter the high pressure area with the liquid from the low pressure area, and the bubbles will shrink and condense in the high pressure area The surrounding liquid rushes to the space occupied by the original bubble at a very high speed, generating a high-intensity shock wave, which impacts the impeller and the pump casing, and noise causes vibration.
Due to the long-term repeated impact of the impact force and the chemical corrosion of a trace of dissolved oxygen in the liquid, spots and cracks on the surface of the impeller appear even in sponge-like damage.
The hazards of cavitation caused by submersible sand pumps are mainly as follows:
1) Generate noise and vibration;
2) Flow, lift, and efficiency decrease;
3) Fatigue failure of metal, part of cavitation damage;
How to avoid cavitation in submersible sand pumps
1) When the actual flow rate of the submersible sand pump is greater than the design flow rate, cavitation is likely to occur. In this case, the submersible sand pump has a large head, but the actual use of the head is small, resulting in low head and large flow. The size of the outlet can be appropriately restricted, the pump consumes head, and the flow is reduced to avoid it.
2) If the gap between the cover plate and the pump casing and the impeller is too large, cavitation will also occur. It can be avoided by adjusting the gap during installation.
Whether it is cavitation or normal wear and tear can be determined by the location of the component damage and the specific shape, and it can be corrected and avoided in time.
China Do Pump is a manufacturer of sand pump. dredge pump, electric submersible sand pump and hydraulic submersible dredge pump with relative dredging equipment.Dredging solutions-What are the dangers of cavitation to submersible sand pump, contact Sand Pump Manufacturer China Do Pump at info@dopumpgroup.com or call us at +8615031104888.
