Novel through-flow type cereal cleaning device

Abstract

The invention relates to a novel through-flow type cereal cleaning device. The technical problem to be solved is that the provided cereal cleaning device is required to provide a relatively stable transverse wind source and a feed system with adjustable separation distances and angles so as to achieve a better cleaning effect, and is also required to have the characteristics of simple structure, easy operation and low cost. The technical scheme is that the novel through-flow type cereal cleaning device comprises a frame, a feed mechanism arranged on the top of the frame, and a wind source device arranged on a side surface of the frame, and is characterized in that the frame is provided with a cleaning chamber and a material receiving chamber below the cleaning chamber, a baffle plate is arranged on each of the front side and the back side of the cleaning chamber, an air inlet connected with the wind source device is arranged on the left side of the cleaning chamber, an impurity outlet is arranged on the right side of the cleaning chamber, the left side of the top of the cleaning chamber is communicated with a feed port of the feed mechanism, the bottom of the cleaning chamber is communicated with the material receiving chamber, and at least one collecting hopper with an upward opening is arranged in the material receiving chamber.

Description

technical field [0001] The invention relates to a grain cleaning device of a combine harvester, in particular to a novel through-flow grain cleaning device. Background technique [0002] Wheat, rice and rapeseed are the most important food crops in my country. With the continuous improvement of the degree of mechanization of agricultural production in our country, the harvest of these main food crops has realized the operation of combine harvesters. The cleaning device is an important part of the combine harvester, which affects the working performance of the whole machine. The impurity content rate and cleaning loss rate of the cleaning performance are one of the main indicators to measure the product quality of the combine harvester. [0003] Commonly used materials cleaning methods in agriculture include winnowing and screening, among which winnowing is the most important grain cleaning method. When cleaning grains, the difference in aerodynamic properties such as suspen...

AI Technical Summary

Problems solved by technology

The traditional winnowing device uses a centrifugal fan as the wind source, which has problems such as air flow disorder and uneven axial wind speed. When entering a large-volume cleaning chamber, a sudden change in pipe diameter will easily lead to the generation of a large number of eddy currents

Therefore, the pressure distribution of the air flow field in the cleaning chamber of the traditional grain winnowing device is irregular, causing the actual trajectory of the grain to completely deviate from the theoretical trajectory, resulting in a large cleaning loss and an increase in the impurity rate, which is not suitable for cleaning with relatively high requirements. High work occasions

With the continuous expansion of the operating area, the grain combine harvester continues to develop towards high efficiency and large size, resulting in an increase in the width of the cleaning parts of the combine harvester, and it is difficult for the centrifugal fan to obtain a large and stable wind source, which restricts the use of the combine harvester. develop

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