Differential cylinder screen for rape combine harvester cleaning

Abstract

The invention discloses a differential cylinder screen for rape combine harvester cleaning. The differential cylinder comprises a hollow lower shell, an upper shell cover, a cylinder screen body, a center shaft, a hydraulic motor and a feeding auger shell with a feeding opening; the cylinder screen body comprises a cylinder screen support welded into a cavity of the lower shell, a cylinder screen mesh, a first ring guide rail welded to one end of the cylinder screen mesh, a second ring guide rail welded to the other end of the cylinder screen mesh and a ring-shaped transmission gear welded to the end face of the second ring guide rail, the rotation directions of the center shaft and the cylinder screen mesh are opposite, and the transmission ratio of the center shaft to the cylinder screen mesh is (1.5-2):1. By means of the mode that the exterior supports the interior without limitation of the support, sport barriers of materials in the cylinder screen body are reduced, the cylinder screen body and the center shaft do circumferential differential motion, the rotation speed of the cylinder screen body is increased, the centrifugal force is increased, impurities can be removed in time under high-speed rotation of the cylinder screen body, the screening efficiency is improved, threshed materials of rape are screened preliminarily, and the burden of the subsequent cleaning process is reduced.

Description

technical field [0001] The invention belongs to the field of supporting devices of rapeseed combine harvesters in agricultural machinery, and in particular relates to a differential-speed cylindrical sieve used for cleaning rapeseed combine harvesters. Background technique [0002] In the combined rapeseed harvesting operation, rapeseed cleaning is one of the key processes. The operation object is the rapeseed after threshing and separation, mainly including rapeseeds, short stems, pod shells and light residues. The cleaning device of the traditional rapeseed combine harvester is a fan plus a vibrating screen, which has a large vibration and needs to complete the separation of all impurities at one time, which is a heavy burden. The reason for the large vibration of the reciprocating vibrating screen is that its motion direction and speed change periodically. Changing the rotational speed to a stable circular motion can effectively reduce vibration. The common device is a cy...

AI Technical Summary

Problems solved by technology

The traditional cylindrical screen mainly relies on centrifugal force to achieve screening. If the rotating speed is too high, it will be difficult to discharge the impurities close to the screen surface. Therefore, the rotating speed required for the cylindrical screen to realize the function is low, and the utilization rate of the screen surface is not high, resulting in low screening efficiency. , which limits the development and application of traditional cylinder sieves in combined rapeseed harvesting and cleaning devices

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