 |
|
Electric winnower |
|
| Description |
Make a seed cleaner that uses air flow to separate seeds from chaff |
| Primarily For
|
Agriculture |
| Other Purposes
|
Agriculture, Economic Development |
| Climate |
Dry/Arid, Temperate, Tropical |
| Emphasis |
Communities, Individuals, Industries |
| Effort to Implement
|
Advanced |
| Maximum Cost |
$
0 |
| Why |
By Allen Dong, I-Tech, PO Box 413, Veneta, OR 97487
Public domain, no copyright -a gift to humanity
This electric winnower removes chaffs from small grains (barley, clover, quinoa, wheat), large grains (vetch, pea, bean) and dried roots. Airflow is regulated using two baffles, one at the blower exhaust and one at the chute exhaust. The blower is a 1/3 horsepower 1025 rpm AC motor with a 10-inch diameter wheel (Figure 1). The winnower chute is 14 inches wide because 30-gauge galvanized sheet metal flashing (roofing material) comes in 14-inch wide rolls (Figures 2 and 3).
The winnower separates grains from chaff by density difference; the greater the differences in density, the more complete the separation. Materials to be winnowed are placed in the grain tray, and then pushed into the chute through the grain entrance near the top of the chute (Figure 1). The blower forces air upwards from the bottom of the chute. The airflow causes the lighter chaff to follow the air up and out the top of the chute, while allowing the heavier grain to drop down the chute. The winnower cannot separate materials with similar densities (beans from dirt clods; beans from fresh nightshade berries; or wheat from vetch). |
| URL(s) |
http://www.efn.org/~itech/Winnower/Farm-scale%20winnower.html
|
| Availability Limits |
|
| Resources |
Complete instructions on listed url |
| Email |
Withheld |
