| 摘要 |
FIELD: agriculture. ^ SUBSTANCE: double aspiration system of multipurpose grain cleaning machine includes pneumatic separation channels of first and second aspiration, two settling chambers connected to pneumatic separation channels, transverse fan with air outlet channel, and devices feeding grain heap to pneumatic separation channels and discharging settled components from settling chambers. Flow dividing valve in the form of vane rotating around a joint is installed at the border of air intake zone of transverse fan from settling chambers. Transverse fan can change rotor rotation frequency by frequency converter, and top part of internal wall of pneumatic separation channel conjugated with settling chamber can rotate around a joint mounted in conjugation point of pneumatic separation channel with settling chamber. ^ EFFECT: enhanced efficiency of grain heap separation, reduced power cost of transverse fan rotor. ^ 1 dwg |
