王德福, 江志国, 李百秋, 王国富, 蒋亦元. 稻秆与圆捆机钢辊间滑动摩擦特性试验[J]. 农业工程学报, 2017, 33(21): 44-51. DOI: 10.11975/j.issn.1002-6819.2017.21.005
    引用本文: 王德福, 江志国, 李百秋, 王国富, 蒋亦元. 稻秆与圆捆机钢辊间滑动摩擦特性试验[J]. 农业工程学报, 2017, 33(21): 44-51. DOI: 10.11975/j.issn.1002-6819.2017.21.005
    Wang Defu, Jiang Zhiguo, Li Baiqiu, Wang Guofu, Jiang Yiyuan. Experiment on sliding friction characteristics between rice straw and baler steel-roll[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2017, 33(21): 44-51. DOI: 10.11975/j.issn.1002-6819.2017.21.005
    Citation: Wang Defu, Jiang Zhiguo, Li Baiqiu, Wang Guofu, Jiang Yiyuan. Experiment on sliding friction characteristics between rice straw and baler steel-roll[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2017, 33(21): 44-51. DOI: 10.11975/j.issn.1002-6819.2017.21.005

    稻秆与圆捆机钢辊间滑动摩擦特性试验

    Experiment on sliding friction characteristics between rice straw and baler steel-roll

    • 摘要: 针对钢辊式圆捆机秸秆卷捆过程基础研究较少的情况,该文对稻秆与钢辊(由碳素钢冷轧板卷制而成)之间的滑动摩擦特性进行了研究。利用自制的钢辊滑动摩擦系数测试装置,采用L27(313)正交试验方案研究了稻秆含水率、正压应力、钢辊线速度及其之间的交互作用对稻秆与钢辊之间滑动摩擦系数的影响,并通过单因素试验分别获得稻秆含水率、正压应力和钢辊线速度对滑动摩擦系数的影响规律及回归方程。正交试验结果表明:稻秆与钢辊之间的滑动摩擦系数受稻秆含水率、正压应力影响显著,受钢辊线速度影响较显著,且影响因素主次顺序为:稻秆含水率>正压应力>钢辊线速度,而且稻秆含水率与正压应力之间的交互作用对稻秆与钢辊之间的滑动摩擦系数影响显著;单因素试验结果表明:稻秆与钢辊之间的滑动摩擦系数随稻秆含水率的增加而增加,随正压应力的增加而减小,随钢辊线速度的增加而减小;在稻秆含水率为10%~70%、正压应力为1~9 kPa和钢辊线速度为0.2~0.8 m/s时,稻秆与钢辊之间的滑动摩擦系数的变化范围为0.353~0.612。研究结果可为钢辊式圆捆机的研究与设计提供理论依据。

       

      Abstract: Abstract: Rice straw resource is abundant in China, and annual output of rice straw has been over 200 million t. In recent years, as a kind of renewable biomass resource, rice straw is being used widely in new areas. However, because of the scattered distribution, the loose structure and the large volume of rice straw resource, it is difficult for rice straw to be stored and transported, which has seriously restricted the large-scale utilization of rice straw resource. It is very important to use the round baler to harvest rice straw for the comprehensive utilization of rice straw. In view of the fact that the basic research of the steel-roll round baler is less in China, it is urgent to carry out the basic research on the sliding friction between rice straw and steel-roll. In order to provide the basis for the design of the steel-roll round baler, the experiments of the sliding friction characteristics between rice straw and steel-roll (prepared by the rolling of cold rolled plate of carbon steel) were performed in this paper. Using the self-made device for measuring steel-roll sliding friction coefficient, the effects of moisture content of rice straw, positive compressive stress, steel-roll linear speed, and the interaction between them on the sliding friction coefficient between rice straw and steel-roll were studied by L27 (313) orthogonal experiment. Three factors and 3 levels, 3 samples and a total of 18 kinds of treatments were selected and each treatment repeated 5 times, which were used to determine the significance of the impact of factors and the order of factors. Then 5 levels of moisture content of rice straw, positive compressive stress and steel-roll linear speed were respectively selected in the single factor experiment, and the influence of each factor on the experimental index was studied, obtaining the corresponding regression equations and the coefficients of determination. The results of orthogonal experiment showed that: The sliding friction coefficient between rice straw and steel-roll was significantly affected by moisture content of rice straw and positive compressive stress, while less significantly affected by steel-roll linear speed, and the influencing order of factors was moisture content of rice straw > positive compressive stress > steel-roll linear speed. In the interaction between the factors, the sliding friction coefficient between rice straw and steel-roll was significantly affected by the interaction between moisture content of rice straw and positive compressive stress. The results of single factor experiments showed that: The sliding friction coefficient between rice straw and steel-roll increased with the increasing of moisture content of rice straw, decreased with the increasing of positive compressive stress, and slowly decreased with the increasing of steel-roll linear speed. When the moisture content of rice straw was 10%-70%, the positive compressive stress was 1-9 kPa and the steel-roll linear speed was 0.2-0.8 m/s, the range of sliding friction coefficient between rice straw and steel-roll was 0.353-0.612. Regression models had a good fitting degree with experimental results, and could be used to analyze the changes of the sliding friction coefficient between rice straw and steel-roll. The results can provide theoretical basis for the research and design of key components of steel-roll round balers.

       

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