绥中36-1油田注入井欠注原因及治理建议

绥中36-1油田欠注井占总注入井井数的23%,主要是注入压力高导致欠注。对该油田储层特征、注水水质、注聚井堵塞物等因素进行分析,剖析注入压力高的原因。研究表明:储层胶结疏松、泥质含量高、微粒易运移、水敏性强是储层欠注内在因素。外因主要是注水水质超标、管壁腐蚀结垢严重、聚合物吸附堵塞。通过加强腐蚀研究工作、水质分级控制、除铁杀菌以及优化加药系统等措施可有效控制注水水质。注水井酸化体系中强化对Fe、O、S等元素化合物的溶蚀,注聚系统通过加多重滤网过滤并运用复合型化学解堵剂进行解堵可有效解除注入井堵塞,达到增注的目的。     

基于Auto CAD的注射机液压系统图形库的开发与应用

液压系统是注塑机的主要部件,其性能好坏直接影响整机的运行和注射质量,应用Auto CAD的"型"建立塑料注射机液压系统CAD图形库及用参数化技术自动生成液压系统原理图的方法,较好地保证了注射机液压系统的设计质量.     

压电喷油器喷油规律影响因素的研究

基于压电陶瓷的逆压电效应,设计了一种直接作用常闭式压电喷油器结构,并建立了压电喷油器的数学模型,验证了模型的准确性.利用仿真模型分析了喷油器关键结构参数对针阀升程、喷油率等特性的影响.研究结果表明：进、出油孔孔径选择应合适,以便产生理想的先缓后急的喷油规律;控制腔容积应取较小值,以提高喷油器的响应速度;针阀弹簧预紧力的大小应和喷油器的响应时间相匹配.     

共轨喷油器总成衔铁行程的测试

共轨喷油器衔铁的行程直接影响到喷油器多项性能指标,然而,影响喷油器衔铁行程的因素很多,在试验的基础上,提出了采用行程-电感法来测控喷油器衔铁行程,对该方法的工作原理、测量装置做了详细的介绍,对试验结果进行的分析表明,用电感法测控衔铁行程其准确率可达98％以上.     

电控喷油器响应特性仿真分析

本文以德尔福(DELPHI)共轨电控喷油器为研究对象,以系统轨压在160MPa下的喷油规律试验研究为基础,以HYDSIM为仿真平台,建立了电控喷油器仿真模型。通过试验,验证了系统模型;运用模型,研究了对喷油器响应特性的影响因素,并以提高电控喷油器响应特性为出发点,探讨了各关键结构参数的设计原则。通过分析计算,为电控喷油器结构参数的合理选择和设计提供了理论依据。     

节流孔板对电控喷油器性能影响的试验研究

使用EFS喷射试验台,测量电控喷油器在匹配不同参数的节流孔板后所表现小的喷油特性,并加以分析.结果表明:节流孔板是电控共轨喷油器的重要构成部分,既控制着喷油嘴针阀的开启速度,又控制着喷油率的形状.因此,合理优化节流孔板参数,对改进喷油器的喷射性能、改善发动机燃烧状况、降低排放等具有重大意义.     

某型柴油机喷油器结构设计改进的研究

介绍了为解决某型柴油机冒黑烟和性能指标恶化等问题,对喷油器设计结构进行的改进。测试结果表明,喷油器针阀体结构对喷油器喷雾特性、流量和发动机性能起着重要的作用,改进结构后,喷油器的配机效果得到了显著提高。     

一种新型气力式给煤粉装置的研制与实验

在分析总结几种气力式给粉装置的基础上,针对煤粉低尘燃烧技术工程开发中遇到的给粉量不均匀、不稳定等问题,设计了一种直立螺旋-气固喷射器小型给粉装置,该给粉装置巧妙地组合了螺杆与喷射器两个部件,结构简单,控制方便。实测数据结果表明,该装置满足小型煤粉燃烧器供煤量的要求,研制的产品达到了实用化水平。     

Break-up characteristics of gelled propellant simulants with various gelling agent contents

Gel propulsion systems have many advantages with respect to high performance, the energy management of liquid propulsion systems, storability, high density impulse, and low leakage of liquid propellants. The atomization process provides sufficient contact surface area between the gelled fuel and oxidizer jets. It is important to study how injection characteristics of gelled propellants are related with break-up and spray distribution. The break-up and mixing processes are very important in achieving maximum efficiency and necessitate the careful study of combustion instability. Gelled propellants are non-Newtonian fluids in which the viscosity is a function of the shear rate, and they have a high dynamic shear viscosity which depends on the amount of gelling agent contents. The present study has focused on the break-up process, wave development of ligament and liquid sheets formed by impinging jets with various gelling agent contents. Especially, the break-up processes of the impinging jets at the initial conditions are studied. The break-up process of like-on-like doublet impinging jets are experimentally characterized using non-Newtonian liquids which are mixed by ionized water 98.5 wt%, Carbopol 941 0.5wt% or 1.0wt%, and NaOH（concentration 10%） 1.0wt%. For the like-on-like doublet injector, the generation of a liquid sheet at the impinging point of two jets was observed. The spray shape with elliptical pattern is distributed in a perpendicular direction to the momentum vectors of the jets. Gelled propellant simulants with high viscosity jets are more stable and produce less pronounced surface waves than low viscosity jets. Generally, the break-up length decreased due to the increasing Reynolds number. However, surface waves and atomized droplets increased. Gelled propellant simulants from like-on-like doublet impinging jets have the spray shape of closed rim patterns at low pressure. Also, the rim patterns of spray have no disturbances on the spray sheet. As the injection pressure increased, rimless patterns which were composed of ligament sheets and small droplets emerged due to the effect of the aerodynamic action. Periodic wave-like structures observed from the near impingement point and atomized droplets were observed at a location further downstream.     

利用文丘里引射装置回收利用高压天然气压力能

介绍引射器的基本工作原理及其特性,并对该项技术中的关键设备超音速引射器进行设计研究。工程应用表明,采用文丘里引射装置是以高压天然气引射低压人工煤气,不仅拓宽了天然气的应用领域,而且通过回收天然气管网压力能,可大幅度节省电耗,降低生产运营成本,提高城市燃气管网运行的可靠性。