What is cavitation? Why does cavitation occur in pneumatic conveying equipment? What is the process? A small compilation of these issues for everyone to understand.
Cavitation, also known as empty talk, is a phenomenon in pneumatic conveying equipment machinery. When cavitation occurs, it will produce noise and vibration, accompanied by a reduction in flow, head, and efficiency, and sometimes cannot be copied. Cavitation usually occurs at the inlet of the impeller of the pump during its operation. The reason for the occurrence of cavitation can be seen in principle, that is, the lower the pressure at the inlet of the impeller, the greater the suction capacity, but if the pressure decreases to a certain value At that time, cavitation will occur.
The following editors specifically describe the process of cavitation formation:
In its impeller, after the small bubbles generated re-condensed and collapsed, it seemed to form a cavity. At this time, the surrounding liquid rushes towards this cavity at a high speed, and the liquid particles collide with each other to form a local hydraulic impact, so that the local pressure can reach hundreds of atmospheres. The larger the bubble, the greater the local impact pressure caused by its condensation collapse. If these bubbles are stained near the surface of the impeller of the pneumatic conveying equipment
, the liquid particles, like many small bullets, continuously hit the metal surface. This impact speed is fast, and the metal surface will soon be eroded due to fatigue. If the generated bubbles are also mixed with some kind of active wave gas such as oxygen, they can use the heat released when the bubbles condense to make the local temperature rise up to 200-300 degrees Celsius, which will cause electrochemical corrosion of the metal and accelerate the metal. Destructive effect. The combined phenomenon of gasification, condensation, impact, and metal erosion of this liquid becomes "cavitation".