稻谷异常喂料状态对砻谷机胶辊接触力学特性的影响

程敏^1*，周时豪²，潘勇³，孟昊聪¹，王星闯¹，曹宪周¹

(1. 河南工业大学机电工程学院，郑州450001，中国；

2. 奇瑞商用车（安徽）有限公司 河南分公司，开封475008，河南，中国；

3. 河南机电职业学院智能工程学院，郑州451191，中国）

摘要：针对砻谷机胶辊不均匀磨损问题，该研究通过构建稻谷颗粒与胶辊相互作用的非线性有限元模型，系统揭示了稻谷料流异常状态对胶辊接触力学特性的影响机制。

结果表明：稻谷取向角为0°～15°时，胶辊磨损风险最低；取向角为30°时，接触压力骤升至12.63 MPa；取向角为45°时，以剪切载荷为主，米塞斯应力峰值达2.70 MPa，胶辊磨损与脱壳效果均不理想；取向角为60°～90°时，胶辊磨损较轻。

稻谷稀疏排布时，3粒稻谷会引发胶辊中部的剪切疲劳；5粒稻谷对应的接触压力为7.09 MPa，易导致胶层局部脱落；6粒稻谷虽磨损风险在稀疏工况中最低，但动态稳定性较差。与之相反，12粒稻谷的密集分布状态下，接触压力为6.92 MPa，作用时差仅0.2 ms，应力分布更均匀、动态同步性更优。

稻谷堆叠会产生极高的接触压力与米塞斯应力（最高分别可达13.85 MPa和5.44 MPa），是诱发胶辊裂纹萌生与局部剥落的主要原因。稻谷堆叠料流的力学性能远劣于分散料流，必然导致胶辊的不均匀磨损。该研究可为减轻砻谷机胶辊不均匀磨损、提升稻谷加工效率提供理论支撑。

关键词：胶辊砻谷机；不均匀磨损；稻谷料流异常；非线性有限元；接触压力；米塞斯应力

DOI: 10.25165/j.ijabe.20261901.10272

引用信息: Cheng M, Zhou S H, Pan Y, Meng H C, Wang X C, Cao X Z. Effects of abnormal paddy feeding states on the contact mechanical properties of rubber rollers in rice hullers. Int J Agric & Biol Eng, 2026; 19(1): 251–262.

阅读全文链接：Effects of abnormal paddy feeding states on the contact mechanical properties of rubber rollers in rice hullers

Effects of abnormal paddy feeding states on the contact mechanical properties of rubber rollers in rice hullers

Min Cheng^1*, Shihao Zhou², Yong Pan³, Haocong Meng¹, Xingchuang Wang¹, Xianzhou Cao¹

(1. School of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou 450001, China; 

2. Chery Commercial Vehicle (Anhui) Co., LTD. Henan branch, Kaifeng 475008, Henan, China; 

3. School of Intelligent Engineering, Henan Mechanical and Electrical Vocational College, Zhengzhou 451191, China)

Abstract: Aiming at the problem of uneven wear of rubber rollers in rice hullers, this work systematically revealed the influence mechanism of abnormal paddy flow states on the contact mechanical properties of rubber rollers based on a nonlinear finite element model of the interaction between paddy grains and rubber rollers. The results show that the wear risk of rubber rollers is minimized when the paddy orientation angle ranges from 0° to 15°. At 30°, the contact pressure reaches 12.63 MPa with a sharp increase. At 45°, shear-dominated loading results in a peak von Mises stress of 2.70 MPa, with unsatisfactory rubber roller wear and hulling rate. Paddy orientation angles from 60° to 90° lead to slight rubber roller wear. With a sparse paddy distribution, 3 paddy grains induce shear fatigue in the middle of the rubber roller, whereas 5 grains result in a contact pressure of 7.09 MPa, which can cause local rubber layer detachment. Although 6 paddy grains exhibit the lowest wear risk among sparse distribution conditions, their dynamic stability is poor. Conversely, a dense distribution of 12 paddy grains results in a contact pressure of 6.92 MPa with a time difference of 0.2 ms, featuring a more uniform stress distribution and superior dynamic synchrony. Paddy stacking causes high contact pressure and von Mises stress (up to 13.85 MPa and 5.44 MPa, respectively), which is the primary cause of crack initiation and local spalling on rubber rollers. The mechanical performance of stacked paddy flow is far inferior to that of sparsely and densely distributed paddy flows, which will inevitably cause uneven wear of the rubber rollers. This study provides theoretical support for reducing uneven wear of rubber rollers and improving paddy processing efficiency.

Keywords:  wrubber roll huller, uneven wear, abnormal paddy flow, nonlinear finite element, contact pressure, von Mises stress

DOI: 10.25165/j.ijabe.20261901.10272

Citation: Cheng M, Zhou S H, Pan Y, Meng H C, Wang X C, Cao X Z. Effects of abnormal paddy feeding states on the contact mechanical properties of rubber rollers in rice hullers. Int J Agric & Biol Eng, 2026; 19(1): 251–262.

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