Design and Testing of a Directional Clamping and Reverse Breaking Device for Corn Straw

Abstract

Realizing high-quality and increased production of fresh corn and promoting diversified development of the corn industry structure not only can effectively promote the development of agricultural economy, but also can enrich people’s dietary culture. However, existing fresh corn machinery has a high rate of ear damage during the harvesting process, and the overall harvesting efficiency is not ideal. To reduce damage during the harvesting of fresh corn, a device for breaking ears of fresh corn was designed based on the directional clamping of corn straw reverse breaking method. Based on the physico-mechanical characteristics parameters of fresh corn ears, the main structural parameters of the directional clamping and conveying mechanism and the ear-breaking mechanism were determined. The overall inclination angle of the device is 15°, and the effective conveying length of the directional clamping mechanism is 550 mm; the ear-snapping mechanism comprises a snapping roll composed of a pair of six radial distribution function fingers, with an effective operating radius of 320 mm. By simulating and analyzing the reverse breaking movement of directional clamping corn straw, the key motion parameter ranges of the directional clamping conveying mechanism and breaking mechanism were obtained. The results of the bench test showed that under the optimal conditions of a directional clamping feeding speed of 1.67 m/s, a breaking wheel speed of 80 rpm, and a travel speed of 1.06 m/s, the lowest ear damage rate was 0.57%, and the lowest impurity rate was 1.87%. In addition, it was observed that flexible harvesting can improve harvest efficiency and quality. The study also found that actively applying force to the device can effectively avoid the problem of machine blockage and reduce the damage rate of ears (the following text uses ears instead of fresh corn ears).

Design and Parameter Optimization of Conveying and Baling Devices for Ramie Cutting and Baling Machine

“…The function of the chain is to clamp and convey the stalk laterally to the left side of the baling device. At present, crop clamping and conveying devices mainly include three forms: the chain type, double-belt type and three-belt type [22][23][24]. The main principle of the belt clamping conveyor is to forcefully clamp the stalk by friction, which is mainly used for fragile and easily damaged varieties of crops [25].…”