AIR DIFFUSER FOR VACUUM FAN OF PLANTERS

摘要

A diffuser for the vacuum fan used with agricultural equipment. The diffuser has a rectangular outlet fixed to the outlet of the fan and a diverging rectangular cross-section outlet for increasing the cross-sectional flow area. A primary flow path between the inlet and the outlet is no less in area than the inlet to the diffuser and a series of rectangular side chambers with perforated walls covered by sound deadening material have predetermined dimensions to decrease the outlet air velocity attenuate selected noise frequencies.

主权项

1. A diffuser for the outlet of a vacuum fan, said diffuser comprising:
a housing having an inlet connected to the outlet of said vacuum fan, an outlet having diverging walls to increase the cross-sectional flow area, and a flow path between said inlet and outlet that is no less than the cross-sectional flow area of said inlet; said housing having a primary flow path between said inlet and outlet with side chambers extending from said primary flow path, said side chambers having predetermined dimensions for attenuating specific noise frequencies.