一种精密水压试压装置的设计和应用

介绍了一种精密水压试压装置.压力试验所用的压力釜能够自动快速开闭,密封采用自紧式密封结构.精密水压试压系统向压力釜打压时,通过稳压、缓冲、减振的作用,使升压平稳,保压精确,压力釜内的被试件不会因为压力波动太大而失稳.该装置能够完成对试压工艺曲线有严格要求的产品外压试压.     

液压支架立柱与千斤顶试压系统研制

为缩短液压支架立柱与千斤顶的试压充液时间,提高试压效率和安全性,研制了液压支架立柱与千斤顶试压系统。该试压系统流量大,充液、增压快,换向快捷省力,性能稳定,试压效率高,密封性和保压性好,操作简单、便于维护。     

提高KQ65/105型井口试压一次合格率

以濮城油田KQ65/105型井口在试压过程中经常在底法兰和试压接头连接处出现压降超标为例,介绍了一种新的检测方法,给出了试压接头试压前的密封处理方法和应用效果。     

基于MCGS的井控装置试压监控系统的设计

井控装置在使用一段时间后需要进行检修和耐压检测(试压),以保证其安全性.以往的人工试压方式安全性差,精度低,无法得到具有说服力的结论,可信度不高.针对这种情况,采用USB7325A为主要硬件设备,MCGS组态软件为开发平台,设计了一套井控装置试压监控系统,实现了压力的采集与显示,泵的控制,数据的保存,报表的打印等功能....     

输气管道严密性水试压稳压时间研究

建立了考虑管道弹性变形和含有一定量气体时输气管道严密性水试压稳压时间计算的数学模型。利用该模型对某一段西气东输管线进行了计算。结果表明:对于相同压降,管内含气量越多,管容越大,所需稳压时间越长;当管内含气量较少时,所需稳压时间随试压压力的增加而增加,当含气量较多时,试压压力在4~10 MPa时,管道压力对所需稳压时间影响不大。研究成果为管道严密性水试压稳压时间的确定,以及强度试压和严密性试压不能合并提供了理论依据。     

安全清洁生产作业配套技术推广应用

针对日常油水井试压过程中,"水泥车+罐车"试压工艺安全系数低等诸多缺点,研制应用了新型试压车。使用该装置可消除环境污染,具有简单实用、高效准确的试压功能。     

全自动上扣式油管水试压系统

针对采油生产要求和条件,在国内首次采用三套试压装置对随机进入试压厂房的三种油管进行水压试验。本文介绍了试压装置的结构原理及整套系统的方案设计。     

基于SolidWorks的油管试压机造型设计

简介了所设计的油(套)管试压机的功能原理、整体结构以及相关参数,并结合试压机的结构特点,详细论述了利用SolidWorks软件对其进行参数化设计的过程,包括零部件和装配体的三维造型设计以及二维工程图的生成.     

采煤机液压制动器试压失效分析及压力校核

煤机液压制动器在装入整机前都要进行打压试验,某公司现用摩擦式液压制动器在试压过程中经常出现试压失效的情况。通过对采煤机液压制动器试压失效原因分析、试压压力校核计算,最后得出结论。综合考虑各种因素,同时参考计算结果,从而修正了某公司自制液压制动器试压压力。     

单列向心球轴承尼龙保持架收缩率

我们试压了306等六个单列向心球轴承塑料保持架,试压材料为:尼龙1010.对其外径、内径、球兜孔及中心径等的收缩率进行了测量,其结果如下,供同志们进一步设计、试制时参考.     

Formation of a flange from a flat blank with a hole

A model of axisymmetric formation of a flange from a flat blank with a hole by expanding by a hard punch with a fixed flat flange is given, taking into consideration contact friction, change of wall thickness, strengthening of material, and the tool bending radius. Elastic, elastic-plastic and hard-plastic process stages are studied.     

装载机新型工作装置设计理论的研究

推出了一种装载机工作装置的新型机构 ,克服了传统工作装置由于设计误差而产生的“干涉”现象 ,实现了无铲斗平移引导油缸工作装置 ,使其结构大为简化 ,设计极为简单。此外 ,还分析研究了这种新机构的设计计算方法。为今后进一步改进现有装载机工作装置提供参考     

Estimation of a Bottom Echo-Signal Level Reflected from a Plane Surface of a Cylindrical Article Using a Normal Probe Operating in a Pulsed Mode

The influence of the pulsed operating mode on a bottom echo-signal level reflected from a plane surface of a cylindrical article is studied during variations in the article's radius. It is shown that the pulsed character of a signal smoothens this function significantly as compared to that in the previously computed continuous mode. Numerical estimates of the bottom echo signal have been made for the ultrasonic inspection of wheel-pair axles of railway vehicles.     

Buckling of a thin spherical shell inside a spherical cavity of a contracting massive body

The problem of buckling of a thin elastic spherical shell inside a spherical cavity of uniformly contracting massive body is considered. This problem arises, for example, when designing pressure vessels made of composite materials with a thin metal cap layer. It is assumed that at the beginning of the compression the shell fits tightly against the wall of the cavity (to the rigid frame). An algorithm for searching the equilibrium state of the shell in the supercritical state is described. As a result of solving the problem, among other things, critical values of compressive strain and shell configuration in the supercritical state were obtained.     

Operation of a tight joint under a torque

A tight joint subjected to a torque is considered, in the case of pliability of the joint components and tangential pliability of the contact layer. On that basis, the torque distribution over the joint length may be determined more precisely, and fretting wear may be predicted.     

The Formation of a Packet of Radicals with a Short Rise Time of Their Concentration in a Gas over a Solid Surface

The formation technique of a modulated flow of radicals in ground electronic and oscillatory states with the rise time of the radical concentration in the gas over a solid body t = 10 ms is offered.     

Operation of a Dilution Refrigerator in a Micromode

Two design versions of a ³He-in-⁴He dilution refrigerator with ³He pumping out through its condensation on a cold wall are described: a classical refrigerator with a heat exchanger and a refrigerator with a collector that allows for operation in a quasi-single mode. The refrigerator operated stably in both cases when a power of 30 W was fed to the still, i.e., at a circulation rate of ³He of a few micromoles per second. In this case, the mixing chamber was cooled down to a temperature below 0.05 K.