Basic conceptual scheme of the threshing and separating device of the flax fiber combing machine

Abstract

Harvesting of flax for fiber and seed production is carried out depending on the specific conditions by different technologies: direct, separate and factory. A technical and technological study of separate harvesting of flax fiber by improving the basic conceptual scheme of the picker-combing machine is presented. The traditional technologies of harvesting flax fiber and technical means that ensure the implementation of technological operations related to the separate technology of harvesting are considered. Disadvantages of the technical means used in the separate harvesting technology of flax fiber are revealed. They consist in varying degrees of impact of threshing and separating combing bodies of harvesting machines of both rake and rotor type on the stems, which causes uneven curing along their length and leads to the deterioration of fiber quality, reduction of the number of extra valuable long fiber and losses of the seed part of the crop. A conceptual scheme of the basic threshing and separating device of a roll-fulling type for separate technology of flax fiber harvesting by improving the picker- combing machine is proposed. The proposed device variant provides simultaneous threshing of flax fiber strips and creates favorable conditions for quality curing of straw to the state of flax straw simultaneously along the entire stalk length by its uniform conditioning in the gaps between the rubberized rollers. The combing header equipped with a threshing and separating device of the roll-fulling type allows to separate the seeds from the uncombed flax strip regardless of the location of the seed part relative to the movement direction of the harvesting machine. Versatility, simplicity and wide range of application of the threshing and separating device of the roll-fulling type are reasonable to use when designing machines for harvesting flax fiber for direct, separate and factory harvesting technologies.