Combustion Synthesis of SiO2 on the Aluminum Plate

IntnductionThere are a number of teChniques Presently available for the synthesis of nanopwhcles of oxides and nonokides, includingDndcrowave plasma synthesis['1, plasmaarc synthesisly, and pyrolysis and condensation ofchemical Precursors in the flame at ambient pressureal].The aPProach of uhlizing combushon synthesis toproduce oalde POwders, such as SiO2, A12O3 and TiO2, isalso a quite modem technology['"]. The synthesizedpndcles can be edictly deposited to form a thin film onthe surfac…     

Dropwise condensation heat transfer of steam on a polytethefluoroethylene film

bouctionThe higher heat tranSfer phae due todroPwise condensation as cOmPared with filIncondensation had bo inveshgated extensively by manyresearchers durin the past sixty years["n. Grea PrOgI'esshad been Inade in understanding the IneCanisms fordroPwise condensation pessP'q, However unscondensation mode had not been widely aPPlied toPIaedcal heat exchanger devices due tO the crucialProblem of han an effeChve method formanhaurin the bopwise condensation sbos.ReCetly, the successful aP…     

Effects of blade geometry on performance of wells turbine for wave power conversion

IntroductionThe fossil fuel energy with the problem of airpollution might run out by the middle of the 21stcentury. So many researchers have studied forscores of years on alternative, renewable energysources11] such as tidal, wave, salinity gradient,current, wind and solar energy.The energy density level of waves is higherthan the other energy sources stated above. Thereare various techniques for extraction of energyfrom waves[2]. Several of the wave energydevices using the principle of an os…     

Coupled aeroelastic oscillations of a turbine blade row in 3D transonic flow

heodctionThe trend of imPrved gas ndine engine designwith higher Hntalc blade loadin and sInallerPhysical size attraCtS much Mon to the aeroelasticbehayour of blades not Ouly in comPI'essors, bu also intuIbines. Flow-induced triine and comPressor bladesoscillations can lead to fatigUe failures of a constrUctionand so rePrsent imPorIant Problems of reliability, safety,and operatin cost.The hahonal aPProach in flutter calculations ofblW disks is based on twency doInain analysis"ro,in whi…     

一种小型手握式喷嘴驱动器的设计与制作

本文设计制作了一种体积小、结构紧凑的手握式喷嘴驱动器,可用于检测电控汽油喷射喷嘴的工作状况。     

摩托车发动机润滑油劣化的分析

本文分析了摩托车发动机润滑油在使用过程中劣化的原因、过程、产物以及理化指标随里程的变化规律。     

全自动缸盖气道检测试验台的研制

气道是影响柴油机燃烧规律的重要因素,气道的检测对于产品的影响至关重要,本文结合自动缸盖气道检测试验台的开发与研制过程,对气道的检测、数据采集处理、结果分析等进行了对比和研究。     

城市道路中机动车尾气排放分析

机动车的排气污染对人体的危害是巨大的,在城市空气污染中机动车的排气污染占很大的份额。随着国家经济的高速发展,机动车的数量也正飞速半长,机动车排气污染问题己相当严重。为了对机动车在城市道路上排放的实际情况有一定了解,文中给出了城市道路中不同类型的机动车车流量的实测值。并选取不同的排放因子对实测结果进行处理分析,计算得出不同类型的机动车在道路上的实时排放量。这将对城市的空气污染治理提供一定的参考。     

曲轴断裂原因分析及解决方法

曲轴是柴油机的重要零件,本文针对R180柴油机曲轴的断裂失效现象进行分析,提出相应的解决方法。     

利用普通车床加工偏心工件的简易胎具

在曲轴的生产过程中 ,对于多数批量生产的曲轴 ,均使用专用机床和专用夹具加工曲轴的连杆轴颈 ,但是 ,对于小批量的试制曲轴产品 ,若使用专用机床和专用夹具加工连杆轴颈 ,则存在着专用工装夹具的设计和加工周期长、成本高等问题。为此 ,我们在普通车床上 ,通过将四爪和三爪卡盘巧妙的联接 ,以及对尾座回转顶尖进行改造 ,解决了该问题 ,收到了良好的效果。现介绍如下 :图 1图 1为四爪卡盘和三爪盘的联接示意图 ,联接件 2的方体 (□ )装夹在车床的四爪卡盘上 ,凸台ｄ配接三爪卡盘的内止口后 ,再用螺丝将该联接件和三爪卡盘联接为一体。通过四…