ISO 8909-1:2021 pdf download – Equipment for harvesting — Forage harvesters — Part 1: Vocabulary.
4.2.2.3 flail? cutter device using multiple, radially attached blades that are mounted to pivot on a horizontal rotor Note 1 to entry: Each blade has a transversely cutting edge to cut off crop by impact. Note 2 to entry: The rotor is positioned transverse to the direction of travel. 4.2.3 rotary disc disc on the head row unit used to shear off the crop Note 1 to entry: There are two systems: the one-disc rotary knife system requires a stationary knife against which to shear the crop, and the two-disc rotary knife system requires either a stationary knife or discs that are overlapped and rotated in opposite directions such that the crop is sheared off at the forward intersection of the two disc peripheries. 4.2.4 oscillating scissor knife device consisting of one pivoting knife with two stationary knives per row crop head row unit Note 1 to entry: The knife reciprocates in a semi-circular arc and cuts the crop off against one of two stationary knives. 4.2.5 unidirectional cutterbar device for cutting off stalks comprising a horizontally arranged chain or belt carrying protrusions which guide and shear the stalks against spaced stationary supports 4.3 feedroll one or more cylindrical rolls, generally with protrusions or flutes, used to gather, compress and advance the crop into the cutterhead (4.4) 4.4 cutterhead cutting rotor devices intended to cut the crop into short lengths with reasonable consistency within a range of optional settings 4.4.1 cylinder cutterhead knives on cylindrical mountings such that the cutting edges of the knives are essentially parallel to the axis of rotation 4.4.2 flywheel? cutterhead knives mounted essentially radially with the cutting edges describing a plane perpendicular to the axis of rotation 4.5 stationary knife shear bar fixed plate providing a stationary edge against which the cutterhead knives shear the crop 4.6 recutter screen semi-cylindrical band or plate with holes mounted concentric to a cylinder cutterhead (4.4.1), which starts downstream of the stationary knife (4.5) and continues around the discharge opening Note 1 to entry: The chopped crop is recut by the cutterhead knives as it passes through the screen holes.
Note 2 to entry: The recutter screen is used primarily to reduce particle lengths that are substantially beyond the theoretical length of cut. 4.7 smasher impact attachments protrusions attached either to the cutterhead knives or blower paddles, and/or to the cutterhead or blower housing band used primarily to break whole grains or maize (corn) kernels into smaller pieces either by impact or by shearing 4.8 crop processor driven pair of opposing, counter-rotating rolls or discs placed in the chopped crop stream flow to crush whole grains or kernels into smaller pieces 4.9 inertial chamber chamber with special bottom mounted in the lower part of the cutterhead housing, into which chopped material (maize) is directed and then inertially reversed to the cutterhead housing for re-chopping 4.10 random‐cut? flail? chopping? rotor <cutterhead> multiple flails with transverse cutting edges at their tips, pivotably attached to a rotor positioned transversely to the direction of travel and parallel to the ground
ISO 8909-1:2021 pdf download – Equipment for harvesting — Forage harvesters — Part 1: Vocabulary
