| 摘要 |
FIELD: agricultural engineering, in particular, technique used in grain harvesting machines. ^ SUBSTANCE: cleaner has tossing board with screen extension piece, air-permeable tilt sheet, upper and lower screens, and fan with working wheels. Fan casing is made in the form of shell and walls joined thereto for defining of main and additional branch pipes. Upper strip of additional branch pipe is disposed under end of toss board. Radial partition is located within fan casing, with upper end of partition being arranged in zone of leading portion of tilt sheet and lower end - above shell in spaced apart relation thereto. Lower wall of fan casing is positioned in spaced apart relation with respect to air-permeable tilt sheet so that opening is defined therebetween, and leading end of lower screen is offset toward air-permeable tilt sheet relative to leading end of upper screen. ^ EFFECT: improved separation quality and reduced grain losses due to improved air distribution in working zone of cleaner. ^ 1 dwg |
