Studies on the Effect of Abrasion of Fan Blower of Knapsack Type Mist-Duster on Its Faculty

Abstract

The influences of the abrasion of fan blower on its performance were investigated for 50 hours by dusting polishing powder instead of agricultural chemicals with knapsack mist-duster (Arimitsu-EDM)
(1) The abrasion of fan-case is more severe than that of fan-blade.
The amount of abrasion of fan-blade seemed to increase with time, while that of fan-case was distinguished between 10 to 30 hours.
(2) The feature of abrasion of fan blade was observed every 10 hours.
(3) Both the discharge(air flow)and the driving horse power of fan blade decreased with its abrasion.
This tendency is especially remarkable in the former after 30 hours, driving at the revolution higher than 5000r. p. m. Fuel consumption (grips-h) increased with time.
(4) The efficiency of fan blower declined for the first 10 hours, while it increased thereafter with driving time.
On the influence of abrasion of fan blower on the performance, the decline of discharge should be taken care rather than its efficiency.