查询词典 screw pitch

And expounds the screw pitch error compensation of specific methods.

阐述了丝杆螺距误差补偿的具体方法。

Requirements: Calculate dimensions and parameters like screw pitch, diameter of gear pitch circle etc.

实验要求：根据给定的轴、齿轮、螺纹进行测绘，运用已学过的基本知识，计算出有关尺寸，如螺距、齿轮的有关参数等。

Calculate dimensions and parameters like screw pitch , diameter of gear pitch circle etc. by given casting parts.

根据给定的铸造零件进行测绘，运用已学过的基本知识，计算出有关尺寸，如螺距、孔中心距等的有关参数等。

At first, the kind of high-speed craft and its current situation are introduced in this paper. Through analyze and compare the characteristics of their performance, three kinds of high-speed craft are selected to be optimized. They are hydrofoil-gliding craft, wave-piercing catamaran and frigate, which power equipment of propulsion system are the common screw, pitch-adjustable screw and water-jet propeller.

本文首先介绍了高速船种类及其推进器的发展现状，通过分析比较各种船型的性能特点，选取了三种典型的高速船(翼滑艇、穿浪艇和护卫舰)并分别以普通螺旋桨、可调距螺旋桨和喷水推进器作为三种船型等动力装置。

For the first time, a screw pile and pile driver system for preventing flood and rushing to deal with an emergency was manufactured. The screw piles of the system is different from screw drills used to sap, and it doesn't push soils out. Analyses, including the screw pile's structural strength analysis and the screw blade's welding analysis, were done by ANSYS, which showed that the screw pile's structural strength is enough and that the distort of the screw blade is small. Testing on the screw pile and pile driver system showed that the system performed stably and could meet the need of preventing flood and rushing to deal with an emergency. A mechanics model of interaction of a screw pile and soil was built, and expressions of torque of screw pile's cylindrical part on the condition of screw pile's crew part being driven into soil fully were gained, then the relation of the torque with screw pitch and out diameter of cylinder, which shows the torque decreases with the screw pitch increasing, and that the torque increases with the out diameter of cylinder increasing, which was according with the experiments of the screw pile's being driven into soils, and thus a screw pile with the best structure was chosen. Experiments of bionic surface showed that, on the condition of certain pressure on the surface, the protruding bionic surface can not reduce adhesion and resistance and that the corrugated bionic surface can reduce adhesion and resistance. An orthogonal experiment of the corrugated bionic surface was done with the factors including the width of protrusion, the space between two protrusions, the trolley's velocity and the vertical surface pressure and with the surface frictional coefficient as the experimental target, and some inclusions were drawn that the best combination of the factors was acquired and that the width of protrusion affected the surface frictional coefficient remarkably.

研制了防汛抢险螺旋桩机系统，提高了沉桩作业效率；利用ANSYS对桩体进行整体结构强度分析以及螺旋叶片的焊接分析，表明桩体结构强度足够，焊接过程中，螺旋叶片的变形小；对整个螺旋桩机系统进行试验，表明该系统性能可靠，工作稳定，作业效率高，能够满足防汛抢险沉桩作业基本需要；建立了螺旋桩桩土作用力学模型，得出螺旋桩沉桩过程中螺旋桩螺旋部分完全进入土体时螺旋桩圆柱部分所受扭矩以及扭矩与防汛抢险螺旋桩的螺旋导程和圆柱外径的关系曲线，表明螺旋桩螺旋部分完全进入土体时螺旋桩圆柱部分所受扭矩随着螺旋导程的增大而减小，随着圆柱外径的增大而增大，这与螺旋桩沉桩试验结论相符合，据此优选出最佳结构的螺旋桩；仿生曲面试验表明，尺寸较小的球冠突起型仿生曲面在一定压力作用下未能起到减粘降阻的作用，而尺寸较大的波纹型仿生曲面相对平板具有一定的减粘降阻作用；以波纹型仿生曲面突起宽度、波纹型仿生曲面两突起之间间距、台车的牵引速度以及叶片表面垂直载荷为因素，以曲面摩擦系数试验指标进行正交试验，寻求出在一定试验条件下最佳因素水平组合；波纹型仿生曲面突起宽度在本试验条件下对曲面摩擦系数影响显著，而其它几个因素对曲面摩擦系数影响均不显著；通过波纹型仿生曲面突起宽度和台车牵引速度的单因素试验，表明曲面摩擦系数随着仿生曲面突起宽度的增大而减小，而随着台车牵引速度的变化基本保持不变，和正交试验结果保持一致。

In order to real-timely and accurately measure thread parameters such as thread angle(tooth-type half-angle),screw-pitch,lead,thread height,major diameter,minor diameter,pitch diameter,helix angle etc,and enhance the measuring accuracy,a non-contact thread parameter measuring system based on an array CCD was designed and achieved.

为实时准确地对螺纹的牙型角、螺距、导程、螺纹高度、大径、小径、中径、螺纹升角等参数进行测量，并提高测量精度，设计并实现了基于面阵CCD的螺纹参数非接触测量系统。

Computational formulae of screw diameter D, screw-pitch and eccentricity e were deduced.

推导出泵螺杆直径D、导程T和偏心距e的计算公式。

By means of ANSYS software, three-dimensional stress analysis screw-pitch, thus gained each node's stress and distortion, which provided foundation for further study on screw optimization and stimulation of extruding experiments.

为此，利用ANSYS软件，通过对复杂结构的不等径变螺距锥形螺杆进行三维应力分析，得到了各点的应力值和变形值，为进一步对螺杆的优化研究以及挤压膨化的模拟试验奠定了基础。

Main characters of the feede are described,including diameter of screw axes,screw-pitch,axes rotate speed and power selection etc.Then vane structure models are introduced.

对螺旋给料机设计过程中的几个主要参数进行了阐述，包括螺旋轴的直径、螺距、轴的转速以及功率等，最后还对螺旋给料机的类型进行了阐述。

Preheating system of the die set of swaying tray is heated by adopting Cr20Ni80 resistance wire, as diameter d is 1.5mm, node-pitch D is 36mm, screw-pitch h is 4mm, spiral column L' is 0.91m, 220V single-phase contacting is adopted.

摇盘模具预热系统采用Cr20Ni80 镍铬合金材料电阻丝加热，直径d 为1.5mm，节经D 选用36mm，螺距h 选用4mm，螺旋柱长度L'为0.91m，采用220V 单相接法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。