共查询到20条相似文献,搜索用时 62 毫秒
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对潜水排污泵的运行工况进行了分析,并推导了泵轴功率曲线有极值的必要条件,同时提出了无过载双流道叶轮设计的几个经验公式,对于获得平坦的无过载轴功率曲线具有参考价值。 相似文献
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低比转速离心泵都采用圆柱形叶片,本文从微商(导数)dr/(rdθ)是叶片安放角β的正切函数出发,推导出叶片型线的数学表达式,可供圆柱形叶片设计和模具制造中参考。 相似文献
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研究了兆瓦级风力发电机叶片翼型建模的方法,应用UG、Matlab建立叶片实体模型,提高了建模效率,为后续结构强度、叶片的力学特性计算等进一步分析奠定了基础。 相似文献
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Research on the cathode design and experiments of electrochemical machining a closed impeller internal flow channel 总被引:2,自引:0,他引:2
L. Tang Q. L. Zhu J. S. Zhao Z. J. Fan 《The International Journal of Advanced Manufacturing Technology》2017,88(9-12):2517-2525
In order to improve the electrochemical machining (ECM) precision and efficiency of a closed impeller internal flow channel, the internal flow channel cathode shape and structure were optimized by gap flow field simulation. Firstly, the theoretical model and three-dimensional gap flow field simulation geometric model were set up. Next, the inter-electrode gap flow field simulation results were draw from the streamline, velocity, and pressure cloud picture. Secondly, the cathode and the frock clamp were designed according to the simulation results. Finally, the verification experiment was carried out to evaluate the cathode structure and the ECM process parameters, and the experimental results were consistent with the simulation results. The whole process is stable and no short-circuit phenomenon with the forward flow field machining pattern. The results show that the method of gap flow field simulation-assisted ECM cathode design is useful and economical for machining closed impeller internal flow channel. 相似文献
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详细介绍了数控车床对于二次函数非圆曲线椭圆零件的三种加工程序编制方法的数学模型与原理。通过四个实例具体阐述了编程计算的步骤过程,并编写了加工程序,对此类零件的加工具有参考作用。 相似文献
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基于Pro/E关系式的凸轮轮廓曲线精确设计 总被引:1,自引:0,他引:1
凸轮机构实现推杆预期运动规律依赖于凸轮轮廓曲线,凸轮机构设计的主要任务是凸轮轮廓曲线的精确设计.在高速精密自动机械中凸轮机构凸轮轮廓曲线异常复杂,给凸轮三维精确建模造成了困难,且精度较低的凸轮轮廓曲线不能满足凸轮后续CAM和CAE的要求.凸轮轮廓曲线的设计原理是根据工作所要求的推杆运动规律,导出凸轮转角与推杆位移之间的关系式,用函数关系式捕捉设计意图.根据关系式计算出凸轮轮廓曲线上各点的坐标值,保证生成凸轮轮廓曲线的精确性.按照该理论,提出了2种应用Pro/E三维造型软件精确设计凸轮轮廓曲线的方法. 相似文献
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以双摆线钢球减速器设计中的核心部分--摆线槽齿廓曲线的参数方程为主线,对这一新型减速器齿廓曲线的主要设计参数进行了分析,得出了各参数在这种减速器设计中的选择原则. 相似文献
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运用空气动力学原理,分析割草机悬浮工作原理,理论计算关键零件参数,并运用UG软件设计割草机的核心部件--叶轮. 相似文献
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A nondestructive technique for evaluating the strength of hull elements of submersibles is described. The technique is based on the micromechanical model of temporal dependences of the parameters of acoustic emission that is registered under an original novel technique of loading of a cylindrical hull section. The technique is also suitable for assessing the information value of resource-related acoustic-emission diagnostic indicators. 相似文献
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