Dust generating device based on ball screw

The invention discloses a dust generating device based on a ball screw, which is used for calibrating a particulate matter monitor, and comprises a frame module, a dust dispersing chamber module, a mixing cavity module, a screw transmission module and an air inlet adjusting related module. The specific process is as follows: a material sample is loaded into a cylindrical storage container and conveyed to a rotary brush head through a piston, the rotary brush head accurately conveys a certain amount of sample to a diffusion head, at the diffusion head, airflow is accelerated to a high speed of 180m/s through acceleration of a rectifying device, and the high-speed airflow provides necessary turbulent flow and shearing force for sufficient dispersion of powder, so that the powder is uniformly dispersed. The agglomerated particles are finally dispersed and output, and the output aerosol is in polydisperse distribution. And finally, the method is used for factory or midway calibration of the particulate matter mon