Based on the requirements for acoustic agglomeration test of aerosol

a special screw type micro-feeder

which can feed fine powder material

has been designed

and on the basis of preliminary calculation

three feeding screw rods with identical diameter and different pitch of screws for said feeder

as well as a distinctive agitating facility being designed and fabricated.Through calibration in test

the relationship among the feeding velocity rate

the screw pitch

the revolution speed of screw rod

and the agitation rate has been analysed

and the existence of a critical agitation rate being discovered.Results of test show that the designed screw type micro-feeder can stably and uniformly perfom micro-feeding work

satisfying requirments of acousitic agglomeration of aerosol.