Longitudinal axial flow threshing and cleaning testing device

Abstract

The invention discloses a longitudinal axial flow threshing and cleaning testing device, comprising: a material conveying device, a material feeding device, a longitudinal axial flow threshing and separating device, a cleaning device and a detection and control device. The back part of the material conveying device is connected to the front part of the feeding auger of the feeding device; the back part of the feeding auger is connected to a tangential flow threshing and separating device through a conveying groove; the tangential flow threshing and separating device is connected to an auxiliary feeding device; the back part of the auxiliary feeding device is connected to the longitudinal axial flow threshing and separating device; the cleaning device is arranged below the longitudinal axial flow threshing and separating device; and the detection and control device controls the motion parameters of all the devices, and detects and stores the corresponding parameters. The device not only can imitate longitudinal axial flow threshing and cleaning tests in the fields, but also has the advantages of low cost, safe use, comprehensive monitoring, simple and convenient operation, easy regulation and easy measurement; besides, the device can imitate the working conditions in the fields, and reproduce the conveying, threshing and cleaning processes in the mechanical harvest process.

Description

technical field [0001] The invention relates to a vertical axial flow threshing and cleaning test device. Background technique [0002] At present, the rice combine harvesters produced in China basically adopt horizontally arranged axial-flow drum threshing and separating devices. This arrangement has a compact structure and good operating performance when the feeding amount is small. However, due to the horizontal arrangement of the threshing cylinder, the threshing cylinder cannot be too long due to the limitation of the space position. Therefore, this type of harvester generally has the following problems: First, due to the short threshing cylinder, the threshing and separation capabilities are limited. When the entrainment loss is large, the entrainment loss will increase; the second is that the adaptability to wet crops and some difficult-to-remove crops is poor; the third is that the material distribution on the cleaning screen surface is uneven, and the cleaning effec...

AI Technical Summary

Problems solved by technology

However, due to the horizontal arrangement of the threshing cylinder, the threshing cylinder cannot be too long due to the limitation of the space position. Therefore, this type of harvester generally has the following problems: First, due to the short threshing cylinder, the threshing and separation capabilities are limited. When the entrainment loss is large, the entrainment loss will increase; the second is that the adaptability to wet crops and some difficult-to-remove crops is poor; the third is that the material distribution on the cleaning screen surface is uneven, and the cleaning effect is poor when the feeding amount is large, and the speed is slightly higher. There will also be a phenomenon of "running food" when it is fast

[0005] 1. It is difficult to change the speed of the threshing drum, and it is difficult to obtain the threshing separation effect at different speeds

[0006] 2. The torque of the threshing drum is not easy to measure, and it is difficult to obtain the power consumed by the threshing device

[0007] 3. The replacement of the threshing drum and the threshing elements are very troublesome, so it is difficult to compare the threshing effects of different drum forms and different threshing elements

[0008] 4. It is difficult to adjust various parameters in the cleaning mechanism, including wind speed, fan inclination angle, fan torque, vibration frequency and amplitude of the sieve, etc.

[0009] 5. It is difficult to accurately measure the threshing loss rate and cleaning loss rate

It is not enough to rely solely on field tests to optimize and improve the design of various components in the combine harvester. It must rely on a reliable indoor bench test device to conduct a large number of tests. No related patents have been retrieved yet.

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