J1140型压铸机增压蓄能器设计

根据J1140型压铸机压射系统的设计要求,分析压铸机压射系统增压液压原理,对增压蓄能器的容积进行计算;结合实践应用,介绍蓄能器的选择及应用方法。     

单列引风机、增压风机运行与控制

针对电厂辅机单列系统配置及引风机与增压风机串联运行方式,统筹考虑余热回收装置投运等因素,分析研究串联风机启／停顺序,给出增压风机投运／切除最佳工况（负荷）点,并设置增压风机RB控制回路,以达到安全、节能降耗目的。     

The effect of a novel booster (bisulfate adduct of polyisocyanate) on fluorocarbon chain re-orientation and substrate properties: Synthesis and finishing

This paper describes the fluorocarbon treatment of cotton fabric as a cellulosic substrate co-applied by a novel booster (bisulfate adduct of polyisocyanate) to improve its performance and repellent properties on the fabrics. The booster was synthesized from isocyanate groups blocked with sodium bisulfite and characterized by Fourier-transformed infrared analysis (FT-IR). The repellent properties of the cotton fabrics treated with fluorocarbon or fluorocarbon-booster were compared by FT-IR spectroscopy, water contact angle and 3M water repellency test before and after washing. The results indicated that bisulfate adduct of diisocyanate could be considered as a novel booster to create correct surface interface to maintain fluorocarbon performance without heat treatment and change the fabric properties from water repellency to water and oil repellency due to the decrease of the surface tension from 33 to 28.7 mN/m.     

基于LabVIEW的助力器下壳体测试台设计

汽车助力器下壳体包括了助力器的全部功能部件, 在测试过程中, 首先, 将模拟助力器上壳体零件和助力器下壳体压装在一起, 然后, 开始测试助力器的多项性能数据, 最后, 分离模拟助力器上壳体零件和助力器下壳体, 将合格的助力器下壳体送达下一工序。助力器下壳体测试台主要用于测试助力器的性能指标, 测试过程快速, 可靠, 保证了助力器的出厂质量。测试台由气动单元, 真空单元, 加力单元和控制单元组成, 融合了液压与气动, 传感器与检测等多项技术。     

电动机驱动管道增压压缩机采用先进的无级变速机械装置的优越性

论述电动机驱动管道增压压缩机比燃气轮机驱动具有环保和经济两方面优势，是一种发展趋势；介绍了一种先进的无级变速机械装置一变速行星齿轮的原理；对变频电动机驱动和用变速行星齿轮电动机驱动两种装置的经济和各项指标进行比较；介绍变速行星齿轮在中国的业绩和在美国天然气管道增压站的使用业绩；指出采用变速行星齿轮的优越性以及众多工程公司和压缩机制造厂选用变速行星齿轮的成功经验，展望变速行星齿轮在天然气管道输送方面较大的发展潜力。     

Factors associated with the premature graduation of children into seatbelts

This study investigated the factors associated with the premature graduation into seatbelts for Australian children aged 4-11 years. From 699 child restraint use questionnaires, 195 children were identified as meeting the booster seat height-weight criteria (height: 100-145 cm and weight: 14-26 kg). Of these children, 44% were correctly traveling in a booster seat, while 56% had been moved prematurely into a seatbelt. A multivariable logistic regression model showed that there were a number of key predictors associated with the premature graduation to seatbelts. For example, children who were moved prematurely into a seatbelt were more likely to be older, have other children travelling in the vehicle and have younger parents compared to children appropriately restrained in a booster seat. In addition, there was a significant interaction between vehicle type and parent's household income. Based on the findings of this study, a number of recommendations are made for strategies to enhance appropriate restraint use for this age group, as well as for future research.     

HNS—IV为基的传爆药配方设计及性能研究

选择氟聚物BF作为粘结剂，开展了HNS—IV为基的传爆药配方设计研究，测试了配方的热安定性、内相容性和热感度。依据G／B2178—1994对该配亨进行了安全性鉴定试验。结果表明：该配方有着优异的热安定性和安全性，可用于直列式传爆序列装药。     

液压制动真空助力系统的匹配设计

分析液压制动真空助力系统研究的必要性。分别对液压制动真空助力系统的各个部件(包含真空助力器、真空筒、真空泵)进行性能匹配计算,阐述制动真空泵的匹配性能要求。以依维柯Z35车型为例,给出完整的计算流程。整车初步试验表明,所匹配的液压制动真空助力系统的匹配计算能够满足依维柯的相关标准要求,其系统匹配参数合理。     

太阳能充电90W移动电源

目前,市场流行的小功率移动电源已无法满足,如笔记本等大功率数码产品的供电需求,同时单一的充电方式使得移动电源的续航能力得不到保障。根据市场需求分析,提出一款可以使用适配器、太阳电池、车载电池充电的充电方式以及输出功率多样化,且性能安全可靠的移动电源。其主要包括太阳能充电、20 V输出、12 V输出、5 V输出、电量显示电路以及保护等电路模块。     

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高压射流辅助钻井破岩一直是石油天然气钻井界研究的重要课题。章对产生高压射流的增压方法进行了分类，介绍了井下增压的两种方法及原理，即井下机械增压方法和井下水力增压方法。重点阐述了提出的井下水力增压的原理、方法及初步探索的阶段性成果，为井下水力增压器的研究奠定理论基础。