The NURBS curve is used for fitting the screw profile when cloud datas pretreatment is already done such as eliminated noise data and data reduction, the fitting error is also analyzed. 通过对测量数据的噪声点过滤,数据精简等预处理,采用NURBS曲线拟合螺杆型线并分析了其拟合误差。
The two cones of the sealing sleeve are respectively pressed and sealed with the pipe fitting body and the inclined plane of the screw nut. 封套的两锥形分别与管件体和螺帽的斜面压紧密封。
Master cylinder outlet fitting gasket "Cross recessed pan head screw, single coil spring lock washer and plain washer assemblies" 主缸出油接头垫密片“GB/T9074.4-1988十字槽盘头螺钉,弹簧垫圈和平垫圈组合件”
Based on fitting of measured borehole trajectory data and analysis of force and deformation of rod string of surface-driven screw pump, a model for hollow sucker rod system is established. 在对实测井眼曲线进行三次样条拟合和对地面驱动螺杆泵杆柱在定向井中受力与变形进行分析的基础上,建立了空心抽油杆系统的优化设计模型。
Choosing the fitting fasteners and controling the preload is the key to ensure the reliability of screw joint structure. 保证螺纹连接结构可靠性的关键是选用合适的紧固件并控制其预紧力。