Cleaning device with double cross-flow fans, three air passages and double-layered vibrating screens

Abstract

The invention provides a cleaning device with double cross-flow fans, three air passages and double-layered vibrating screens. The cleaning device comprises a feeding mechanism, a screening mechanism, a winnowing mechanism and a drain delivery mechanism; materials to be cleaned are thrown onto an upper vibrating screen of the screening mechanism from the feeding mechanism to be subjected to vibration screening; long stalks and light impurities are discharged out of a machine body from the upper vibrating screen of the screening mechanism under the action of vibration of the screening mechanism and the action of high-speed airflow of the winnowing mechanism; kernels and partial short stalks penetrate the upper vibrating screen of the screening mechanism, fall onto a lower vibrating screen of the screening mechanism, and are screened secondly under the vibration action of the screening mechanism and the high-speed airflow action of the winnowing mechanism, so that the short stalks are discharged out of the machine body; and clean kernels penetrate the lower vibrating screen of the screening mechanism and enter the grain delivery mechanism. The cleaning device can effectively screen and clean to various feeding amount, is widely applicable to screening and cleaning various agricultural materials; and the cleaned kernels have high cleaning rate and small loss rate.

Description

technical field [0001] The invention relates to the technical field of agricultural crop mechanical cleaning device manufacturing, specifically a double-flow fan, three-air channel, double-layer counter-vibrating screen cleaning device, which can be widely used in agriculture such as rice, wheat, rape, barley and beans. High performance cleaning of material out of the mixture. Background technique [0002] At present, the existing agricultural material cleaning mainly adopts the airflow plus vibrating screen type cleaning device, and the main structure is a single-layer (double-layer) vibrating screen with a front centrifugal fan or a front centrifugal fan and a rear cross-flow fan. Air screen type cleaning device. The airflow speed at the air outlet of the front centrifugal fan is high on both sides and low in the middle. When the airflow reaches the screen surface, the airflow on the screen surface is severely uneven. When cleaning the mixture from large feed crops, the c...

AI Technical Summary

Problems solved by technology

The airflow speed at the air outlet of the front centrifugal fan is high on both sides and low in the middle. When the airflow reaches the screen surface, the airflow on the screen surface is severely uneven. When cleaning the mixture from large feed crops, the cleaning rate and loss The efficiency and production efficiency are difficult to meet the requirements, especially when cleaning wet crops with a large amount of feed in the south and crops with high impurities in the extract, the cleaning efficiency is low and the cleaning loss rate is high; "Centrifugal fan double Air outlet cleaning device and its application" [Journal of Jiamusi University (Natural Science Edition), 1999, 17 (1): 20-22] announced a single-layer vibrating screen with single centrifugal fan and double outlets. It can meet the requirements when the wheat with an input amount of less than 1.5kg / s is extracted from the mixture, but the cleaning effect is poor when cleaning the rice with a large moisture content; 》【Journal of Agricultural Machinery, 2010, 41 (12): 62-66】announced a wind screen cleaning device with a front single-channel centrifugal fan and a rear cross-flow fan. On the basis of the centrifugal fan, a continuous flow fan is added at the tail of the air outlet to increase the airflow velocity on the screen surface, and realize the cleaning of the rice mixture with a feed rate of 2kg / s. High and high moisture content super rice still has poor cleaning quality when it comes out of the mixture; Chinese patent CN1073317A has announced a new structure of grain cleaning device composed of a single centrifugal fan and a layer (two layers) of sieve and Chinese patent CN2216735Y Announced a kind of small combine harvester rear-blowing type double-air channel cleaning device, the cleaning effect is better when the impurity content rate is less than 25%, and the feeding amount is less than 2.7kg / s; The maximum cleaning efficiency is 3kg / s, but there are still disadvantages of low cleaning efficiency, complex structure of cleaning device, and large vibration and noise of cleaning device

With the improvement of crop varieties and the increase of output, the emergence of combine harvesters with large feeding volume (the output mixture to be cleaned is 4-10kg / s), the cleaning performance, working performance, New requirements have been put forward in terms of operating efficiency and reliability. The existing wind screen cleaning device has been difficult to meet the cleaning requirements when cleaning high-yielding rice with high moisture content and high impurity content in the south, which seriously restricts Development of Combine Harvester with Large Feeding Volume

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