查询词典 screw coupling

The taper of the pipe screws has notable influence on the loading distribution along screws, so it is possible to improve load-bearing capacity of the screw coupling by selecting a suitable taper.

文中采用虚拟接触载荷法和位移法研究了螺纹管连接中螺纹齿根部带半椭圆表面裂纹时应力强度因子的计算，在此基础上，提出了螺纹连接简化计算模型。

A numerical method for contact mechanics and fracture analysis for oil drill pipe screw coupling have been systemically studied in a deepgoing way in this thesis.

本文就接触力学的数值计算方法，石油钻杆接头螺纹齿的断裂计算作了深入、细致、系统的研究，主要工作包括以下几方面。

The series SMC connectors with screw –coupling mechanism ,have character of small size light weight ,reliable connect and vibration-proof ,for the connect RF coaxial-cable in electronic equipment and instruments ,and can be interchangeable with the same –type connectors of abroad.

该系列产品具有体积小、重量轻、连接可靠、抗振性能好等特点，供无线电设备和仪器中连接射频同轴电缆用。

The series TNC connectors with screw – coupling mechanism , have characteristic of reliable connect and vibration-proof , for the connect RF coaxial – cables in electronic equipments and instruments and can be interchangeable with the same-type connectors of abroad.

该产品具有连接可靠、抗震性能好等特点，供无线电设备和仪器中连接射频同轴电缆用。

The thread form and helical angle of screw are key factors that influence the screw-in ability of a bolt and reliability of screw coupling. There exist significant correlation between them, therefore the contour of thread portion can be used to judge the acceptability of a bolt.

牙形和升角是影响紧固螺纹通过性和接触可靠性的重要因素，它们之间存在良好的相关性，通过检测紧固件螺纹部分的轮廓线的形状和位置可以判断其通过性和接触可靠性。

These connectors are a kind of low to medium power connectors, with screw coupling mechanism, are widely used connect of the RF coaxial-cable in electronic equipment and instruments, and can be interchangeable with the same-type connectors of abroad.

该系列产品广泛应用于中小功率的无线电设备和仪器中。能与国外同类产品互配。

The type L29 connectors with screw – coupling mechanism, connect dimensions M29x1.5 Characteristic impedance 50

L29（7/16）系列连接器具有螺纹连接机构，外导体内径为6.5mm （0.256in ）、特性阻抗为50Ω。

It is shown that the contact interaction enables bottom drillstring to whirl backward, and then an alternate bending stress with higher frequency is produced. So the drillstring fatigue failure could be accelerated. At the same time, a quite strong wallop force of high frequency is produced on the contacting point, and the contacting zone is next to the screw coupling of drill collars. It will easily result in the failure of screw couplings. The research results provide theoretical basis for the prevention of drillstring failure.

研究表明，下部钻柱与井壁的碰摩作用使下部钻柱反向涡动，产生高频的交变弯曲应力，会加速下部钻柱疲劳破坏；下部钻柱与井壁接触点处存在较大的高频冲击力，并且接触区域靠近钻铤螺纹联结处，更容易诱发螺纹联结处失效，该研究成果可为预防钻柱失效提供理论依据。

The VCL method and the displacement method are used to calculate the Stress Intensity Factors of semi-elliptical surface crack at the root of pipe screws, on the basis of which a simplified calculating model for screws contact is put forward so as to analyse the fracture intensity for oil drill pipe screw coupling. For the semi-elliptical surface crack with different shape and deep ratio at the root of female and male screws and the corner of male flange, the SIF has been studied systemically under inter-pressure, tension, bend and torsion loads and the approximate formulas encluding the structure parameters of oil drill pipe screw coupling, deep ratio and the shape parameters of surface crack are developed.

对工程实际中的多种石油钻杆接头螺纹连接件，就公螺纹齿根、母螺纹齿根、公螺纹台阶转角处存在的不同形状、不同厚度比的半椭圆表面裂纹，在拉伸、内压、弯曲、扭转多种载荷作用下的应力强度因子作了系统研究，在大量有限元计算基础上，建立了包含接头结构参数、裂纹形状、厚度比在内的近似计算公式。

AMP - HYDRAULIKA s.r.o.- the society holds further information ready for all inquiries within the ranges Manufacture, Screw, Coupling as well as for Filters and repairs by Mail.

是一家现代化的、可靠的专门产品供应商，这家供应商从事旋紧螺栓，手机，压缩机，轮胎成型、服装批量生产，机车，产出输出，卖、出售的制造、销售。

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。