Research On The Nail Tooth Roller Differential Type Corn Threshing Device

Corn harvest work is the most important part of the corn production process, and the key links of corn grain threshing is harvest work. At home and abroad at present, corn thresher threshing efficiency of machines and generally high threshing rate, damage rate index requirements, this stage of the technical indicators data for specific is:corn grain moisture content is 18%, the threshing rate, to keep the level of 98% 99% damage rate between 1% and 2%. In view of this, this article developed a new corn threshing device, the key problems is by optimizing threshing process principle, improve the structure component, to improve the threshing corn threshing device rate and reduce the damage rate of.Involved in the design and manufacture of agricultural machinery, to the deep understanding of the mechanics and dynamics in the process of farming is indispensable. In order to study the performance good corn threshing device, design a practical new type thresher, the main research content of this paper and will have the following conclusion:(1) Analysis and research of maize grain and the grain morphology characteristic of physiology, ranges of grain appearance size of the Angle measuring and data sampling, as the study of the lower breakage of threshing technologies and devices, in theoretical analysis and validation link source provides the basis.(2) The research of corn grain, corn cob and corn grain and the mechanical properties of links between corn cobs, to understanding the process of the corn grain fell off the corfn cob, corn seed fruit stalk rupture process, especially the strong blow from the rigid parts damaged grain and the bonding force between the spindle. In core rod mechanical characteristics analysis, mainly through the model is established in this paper, theoretical analysis, thus power works best when working in corn grain threshing parts and loading direction and related conclusions.(3) According to the study results of new type thresher (nail tooth double roller differential type corn threshing device) design, on the premise of threshing way to determine, for key components (threshing room, into the mouth) to carry on the design selection, especially to reduce the working parts of corn grain of the extrusion, impact and collision caused by rigid mechanical damage, highlight the new threshing space area to improve thinking and analysis, analysis of key components threshing device operation mechanism, and by calculating the useful parameters selected areas each threshing device structure.(4) According to the preliminary design of threshing device, the necessary test, the use of single variable method, it is concluded that statistical data, thus to obtain the evaluation index of corn thresher performance is based on. Analysis of test results and give a reasonable explanation:corn ear inputs increase, threshing machine cavity grain number, grain, grain and machine components between the contact between the frequency increases, the threshing rate of natural increase; Rods at the same time, the threshing device working cavity cod increases, grain, grain, grain, and between machine between extrusion, friction and collision between the element interaction frequency increased, the grain breakage to rise, but roll pole tooth is in accordance with the spiral on the layout, can promote the corn grain along the roller axial movement to the row of core, shorten the time of the grain on the threshing chamber, ensure that frequency is limited by a certain degree of corn ear shock.(5) Threshing device normal operations when the corn grain into the threshing chamber movement direction roughly parallel to the roller axis, can ensure grain in accordance with the expected design work location, loading direction to effectively combat. At the same time, the threshing chamber on the roller tooth nail for corn grain threshing components such as force is small, is helpful to reduce the grain broken rate.(6) For traditional corn thresher operations caused by grain threshing large loss rate, broken rate is high, the key work parts-nail tooth double roller threshing device is optimized to improve, the combination of differential type double rollers and into the mouth of the improvements, developed the nail tooth double roller differential type corn thresher, the threshing rate, grain crushing rate, basic can conform to improve high pure, low broken threshing operation requirements.