API螺纹啮合后存在的螺旋性间隙是导致螺纹接头泄漏的根本原因。
It is the helical clearance area in API connections after making up that contributes to leaking.
在手指旋转使螺纹啮合无间隙后，再用带式扳手旋转不要超过一至两圈。
Apply strap wrench make-up of no more than one to two turns beyond finger tight thread engagement.
研究结果表明：接触应力、上扣扭矩、螺纹啮合时的几何约束，是齿面粘扣的力学要点。
The research result states that the contacting stress, thread torque and thread joggle geometry restriction are mechanical points of the sticky thread.
由于每根螺杆两端螺纹的旋向相反，螺杆转动时，由螺杆啮合线形成的泵工作腔。
Because each thread rotate to the opposite on both ends of the screw, the screw rotates, formed by the screw meshing line pump working chamber.
螺纹杆与齿轮相啮合；改变轴旋转运动的方向。
利用A NSYS有限元分析软件对啮合同向双螺杆挤出机的螺纹元件流场进行了三维等温非牛顿模拟分析。
Three-dimensional flow simulations of the flight element in an intermeshing co-rotating twin screw extruder are performed by solving the Navier Stokes equations with a finite element package, ANSYS.
实验结果还表明：采用非啮合多过程元件螺杆组合得到的试样的力学性能均比采用常规螺纹元件螺杆组合得到的试样的力学性能好。
These experiment results also showed that mechanical properties of samples extruded by the combined configuration with NI-MPE were higher than those extruded by the common screw configuration.
双螺杆磨浆机是一种同向旋转、啮合型磨浆专用的双螺杆挤出机。根据相对运动原理得到的双螺杆磨浆机的螺纹曲线比较复杂，不利于加工制造。
Twin screw refining extruder works at high consistency and is an energy and water saving refining machine, it is a co-rotating and intermeshing twin screw extruder which is special for pulp refining.
借助于装有玻璃视窗的可视化啮合同向双螺杆挤出机，对高密度聚乙烯(HDPE)颗粒在螺纹元件组合中的熔融过程进行了研究。
Extrusion of HDPE pellets in flight elements combination is studied by visualized co rotating twin screw extruder. Results show that pellets have little deformation in flight elements combination.
将啮合块上、下游加入螺纹元件一同参与计算，可适当的解决出、入口边界条件失真的问题。
When simulating an individual kneading block, simplified entry and exit boundary conditions caused deviations between the simulation and the actual extrusion at some extent.
将啮合块上、下游加入螺纹元件一同参与计算，可适当的解决出、入口边界条件失真的问题。
When simulating an individual kneading block, simplified entry and exit boundary conditions caused deviations between the simulation and the actual extrusion at some extent.
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