DEVICE FOR SPREADING STRAW TO GRAIN HARVESTER Russian patent published in 2012 - IPC A01D41/12 

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural machinery and can be used when harvesting agricultural crops with uniform spreading straw on the field surface. The device comprises a chute board-spreader with a shield mounted behind the straw separator. The chute board is made in the form of a wedged separator - divider, facing upwards with its top, having side edges, mounted on the axis of symmetry of the harvester. Under the separator there is a pipe communicated with a source of excessive pressure, having nozzles facing in opposite directions relative to the longitudinal axis of the harvester. The slope angle of the side edges of the separator to the horizon is not greater than the angle of friction of straw on the edges material. Mounting of the wedged separator enables to divide the flow of straw coming out of the straw separator into two parts. Airflows coming out of the nozzles evenly spread the straw on the soil surface. The width of the scattered zone of the straw is adjusted by changing the air pressure in the system and the nozzles position.

EFFECT: invention provides uniform spreading of straw when harvesting agricultural crops.

2 cl, 2 dwg