Abstract:A centrifugal atomization equipment of spray rotation with high pressure fluid as actuating medium was designed. Because high pressure fluid on one hand forms fluid kinetic pressure lubrication at rotary pair, on the other hand drives rotary plate rotate at high speed when spraying at high speed from the ends of hollow leaves of leaf-type rotary plate, the rotary speed of the plate is up to 30 000r/min, not only increases the fine powder ratio of equipment, but also the equipment possesses the characteristics of low noise, pollution free, easy starting, stepless speed regulation, convenient controlling and so on. The fine powder ratio is higher when combining centrifugal atomization technique of spray rotation with gas atomization spray. The average diameter of Al-20Si alloy powder prepared is 7～8μm.

Key words: spray rotation centrifugal atomization rotary speed fluid lubrication