环模秸秆压块机环模孔型优选与试验
|
摘要
环模孔应力集中是影响环模秸秆压块机模孔寿命和压块成型品质的重要因素。为此,对锥面孔型进行改进,提出了凸曲面和凹曲面两种新型环模孔。同时,运用ANSYS软件对3种模孔成型过程进行分析,研究不同孔型对等效应力及摩擦应力的影响。结果表明:成型阶段锥面模孔、凹曲面模孔及凸曲面模孔最大等效应力分别为20.5、22.3、19.4MPa,最大摩擦应力分别为3.62、3.60、2.15MPa;整个成型过程中凸曲面模孔相比锥面和凹曲面模孔摩擦应力较小且随位移变化较为平稳,成型腔与保型腔连接处应力集中现象基本不存在。试验验证表明:凸曲面模孔出模后的秸秆压块耐久性和成型品质都较优,成型密度为1.029kg/m3,松弛比为1.099,为合理设计模孔从而提高压块品质和模孔寿命提供一定参考。
Stress concentration of ring die hole is the important factor for effect the life for die hole of circular mold briquetting machine and the quality of briquetting,this paper propose two kinds of ring die holes with convex surface and concave surface to improved the cone pass. Use ANSYS software to analyze the forming process for three kinds of mold holes,study on the influence of the equivalent stress and friction stress of different passes. The result indicate that the forming stage of conical die hole and concave die hole and the convex surface die hole maximum equivalent stress are respectively 20. 5MPa,22. 3MPa,19. 4MPa,the maximum friction stress are respectively 3. 62 MPa,3. 60 MPa,2. 15 MPa,the friction stress of concave die hole than convex surface and conical die hole is smaller and displacement relatively stable in the forming process,the stress concentration phenomenon of the forming cavity and the retaining cavity is almost non-existent. the test verificate that the durability and quality of straw briquetting with forming from the die hole of convex surface are optimum,the molding density is 1. 029 kg. m-3,the relax ratio is 1. 099,in order to provide reference for the reasonable design of die hole and improve the quality of briquetting and the life of the die.
Stress concentration of ring die hole is the important factor for effect the life for die hole of circular mold briquetting machine and the quality of briquetting,this paper propose two kinds of ring die holes with convex surface and concave surface to improved the cone pass. Use ANSYS software to analyze the forming process for three kinds of mold holes,study on the influence of the equivalent stress and friction stress of different passes. The result indicate that the forming stage of conical die hole and concave die hole and the convex surface die hole maximum equivalent stress are respectively 20. 5MPa,22. 3MPa,19. 4MPa,the maximum friction stress are respectively 3. 62 MPa,3. 60 MPa,2. 15 MPa,the friction stress of concave die hole than convex surface and conical die hole is smaller and displacement relatively stable in the forming process,the stress concentration phenomenon of the forming cavity and the retaining cavity is almost non-existent. the test verificate that the durability and quality of straw briquetting with forming from the die hole of convex surface are optimum,the molding density is 1. 029 kg. m-3,the relax ratio is 1. 099,in order to provide reference for the reasonable design of die hole and improve the quality of briquetting and the life of the die.
引文
[1]崔明,赵立欣,田宜水,等.中国主要农作物秸秆资源能源化利用分析评价[J].农业工程学报,2008,24(12):291-296.
[2]张晓文,赵改宾,杨仁全,等.农作物秸秆在循环经济中的综合利用[J].农业工程学报,2006,22(S1):107-109.
[3]张炜,吴劲锋.环模制粒机中环模结构型孔的有限元分析[J].中国农机化,2009(2):83-85.
[4]李海英,赵荣煊,腾军华,等.秸秆环模式压块机模具优化研究[J].农机化研究,2016,38(5):65-71.
[5]周亮,孙宇,武凯,等.环模式秸秆压块机模具有限元分析及锥角优化[J].农机化研究,2014,36(6):224-232.
[6]袁晓明,徐静云,韩秀荣,等.ANSYS的生物质成型机环模结构分析[J].农机化研究,2015,37(6):239-242.
[7]刘超,董玉平,吴云玉.基于ANSYS的生物质液压成型模具锥角优化[J].农业机械学报,2009,40(12):125-129.
[8]刘超.基于ANSYS的生物质成型流变规律及进料螺杆模态特性研究[D].济南:山东大学,2010.
[9]姚宗路,赵立欣,田宜水,等.立式环模生物质成型机设计与试验[J].农业机械学报,2013,44(11):139-143.
[10]贾剑,陆萍,董玉平,等.基于ANSYS带衬套生物质成型有限元分析[J].农机化研究,2010,32(6):45-48.
[11]陈树人,段建.一种双环模生物质颗粒成型机:中国,CN103861527A[P].2013-12-23.
[12]徐微.新型液压活塞式秸秆成型机改进研究[D].长春:吉林大学,2012.
[13]刘鸿文.材料力学[M].北京:中国建筑工业出版社,2003.
[14]陈海涛,黄振华,房欣,等.含水率对水稻秸秆流动力学特性的影响[J].东北农业大学学报,2013,44(11):90-94.
[15]霍丽丽,孟海波,田宜水,等.粉碎秸秆类生物质原料物理特性试验[J].农业工程学报,2012,28(11):189-195.
[16]王建祥,蔡红珍.生物质压缩成型燃料的物理品质及成型技术[J].农机化研究,2008,30(1):203-205.
[17]盛奎川,吴杰.生物质成型燃料的物理品质和成型机理的研究进展[J].农业工程学报,2004,20(2):242-245.
[18]陈树人,段建,姚勇,等.环模式成型机压缩水稻秆成型工艺参数优化[J].农业工程学报,2013,29(22):32-41.
[2]张晓文,赵改宾,杨仁全,等.农作物秸秆在循环经济中的综合利用[J].农业工程学报,2006,22(S1):107-109.
[3]张炜,吴劲锋.环模制粒机中环模结构型孔的有限元分析[J].中国农机化,2009(2):83-85.
[4]李海英,赵荣煊,腾军华,等.秸秆环模式压块机模具优化研究[J].农机化研究,2016,38(5):65-71.
[5]周亮,孙宇,武凯,等.环模式秸秆压块机模具有限元分析及锥角优化[J].农机化研究,2014,36(6):224-232.
[6]袁晓明,徐静云,韩秀荣,等.ANSYS的生物质成型机环模结构分析[J].农机化研究,2015,37(6):239-242.
[7]刘超,董玉平,吴云玉.基于ANSYS的生物质液压成型模具锥角优化[J].农业机械学报,2009,40(12):125-129.
[8]刘超.基于ANSYS的生物质成型流变规律及进料螺杆模态特性研究[D].济南:山东大学,2010.
[9]姚宗路,赵立欣,田宜水,等.立式环模生物质成型机设计与试验[J].农业机械学报,2013,44(11):139-143.
[10]贾剑,陆萍,董玉平,等.基于ANSYS带衬套生物质成型有限元分析[J].农机化研究,2010,32(6):45-48.
[11]陈树人,段建.一种双环模生物质颗粒成型机:中国,CN103861527A[P].2013-12-23.
[12]徐微.新型液压活塞式秸秆成型机改进研究[D].长春:吉林大学,2012.
[13]刘鸿文.材料力学[M].北京:中国建筑工业出版社,2003.
[14]陈海涛,黄振华,房欣,等.含水率对水稻秸秆流动力学特性的影响[J].东北农业大学学报,2013,44(11):90-94.
[15]霍丽丽,孟海波,田宜水,等.粉碎秸秆类生物质原料物理特性试验[J].农业工程学报,2012,28(11):189-195.
[16]王建祥,蔡红珍.生物质压缩成型燃料的物理品质及成型技术[J].农机化研究,2008,30(1):203-205.
[17]盛奎川,吴杰.生物质成型燃料的物理品质和成型机理的研究进展[J].农业工程学报,2004,20(2):242-245.
[18]陈树人,段建,姚勇,等.环模式成型机压缩水稻秆成型工艺参数优化[J].农业工程学报,2013,29(22):32-41.