GRAIN COMBINE Russian patent published in 1996 - IPC

FIELD: agricultural engineering. SUBSTANCE: grain combine has hot gas generating and supplying device and grain drying device. Hot gas generating device is formed as combustion chamber 12, with hopper 14 and feeder positioned sequentially below chamber 12. Branch pipe 16 with truncated body is concentrically mounted within combustion chamber. Smaller end of branch pipe 16 is connected to feeder and larger end is coupled with baffling disk 18. Branch pipe 22 mounted in the middle portion of combustion chamber bottom is provided with adjusting flap 23 positioned in its lower part. Upper part of branch pipe 22 is made conical, with larger end oriented toward baffling disk 18. Plate 19 with perforations 20 is mounted on larger end of branch pipe 22. Perforations 20 are formed as arched recesses with convex surface oriented upward with tangentially directed axes extending along concentric circles. Plate 19 is spaced from baffling disk a distance at least equal to 1/4 of average diameter of conical branch pipe 16. Combustion process control windows 28 are made in combustion chamber casing above plate 19. Flue gas discharge branch pipe 29 tangentially positioned in upper part of combustion chamber casing is adapted to discharge flue gas in direction coinciding with direction of recess axes. Combustion chamber bottom is made inclined. Ash discharge branch pipe 31 is connected to lower part of combustion chamber bottom. Ash and straw baffle 24 is disposed below hot gas discharge pipe 29 concentrically with respect to conical branch pipe 16 formed as truncated cone with downward oriented smaller end. Baffle sides have arched recesses 25 with downward oriented convex surfaces and tangentially extending axes. Tapes 26 are fixed to combustion chamber casing below baffle 24 so that they extend along helical path at an angle of 45 deg to horizontal plane. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 17 dwg