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通过确定设备总体结构方素,分别对硅油脱气脱水系统、法兰夹具系统、电气控制系统、定量控制系统及硅油充灌流程等分系统进行了设计和实施,完成充灌设备装配、试运行和效果验证. 相似文献
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注射充模过程可视化实验装置的研制 总被引:5,自引:0,他引:5
介绍了可视化技术在注射充模过程研究中的应用。在国外注射充模过程可视化模具基础上,通过对模具中玻璃形状的改进并采用插件形式的视窗,改善可视化模具的观察环境,降低了整套模具的加工难度与成本,设计制造出一套经济实用的可视化模具。为注射充模过程的可视化实验研究奠定了基础。 相似文献
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注射充模过程的动态研究 总被引:1,自引:0,他引:1
作者设计了一种先进的动态分析测试系统,它实现了采样、分析,记录,绘图自动化。与现有测试方法相比它具有明显的优越性.利用该测试系统能定量分析整个充模过程。 相似文献
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橡胶行业原材料价格不断上涨,至使企业的经济效益下降,在保证质量前提下,设计性能与成本具有最佳比价的配方,降低成本,提高企业的经济效益,是配方设计人员的研究课题。 相似文献
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国内第一套设计加工能力达3.5 Mt/a 的大型重油催化裂化装置,采用美国 UOP 工艺技术设计.介绍了该装置开工过程操作要点及参数控制,以及运用开工汽油和分馏塔充瓦斯技术,减少蒸汽用量、催化剂跑损和富气不放火炬,同时也实现无不合格产品出装置. 相似文献
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1概论《气瓶安全监察规程》的表1、表2以及第7条规定:气瓶主全材料,必须采用镇静钢,高压气瓶必须采用合金钢或优质碳素钢。气瓶主体材料的碳、硫、磷、铜的含量及伸长率,冲击韧性,不能低于表2的要求,同时,还必须符合相应技术标准的各项规定。摘其表1中有关部分:注:(1)te—临界温度℃;Pr—饱和蒸汽压(kg/cm2)(2)设计压力为10kg/cm2的气瓶,除考虑强度设计外,必要时还应对刚度进行校核。上述规定对于仅仅压缩、冷凝液化之气体是适用的,但对于SF6这类液化气体,就不适合,因为SF6这类液化气体,不仅仅是液化充入气瓶,它… 相似文献
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Recently, Park et al. [(2007). Development and performance test of a unipolar diffusion charger for real-time measurements of submicron aerosol particles having a log-normal size distribution. Journal of Aerosol Science, 38, 420–430] have introduced a methodology for performing simple and fast measurements of submicron aerosol particles having a log-normal size distribution, using a unipolar diffusion charger, an electrometer, and a condensation particle counter (CPC). The methodology can be applied to particles of 30–700 nm and requires an assumption of their geometric standard deviation in size. In this paper we propose a much cheaper but faster method which involves substituting a unipolar field charger and another electrometer for the CPC. With the data obtained using this dual-charger system, we developed a data inversion algorithm and estimated the particle size distribution by minimizing the differences between the measured aerosol currents and the calculated values. To compare the size distribution with the data measured using a scanning mobility particle sizer (SMPS), sodium chloride (NaCl) particles smaller than in diameter, and dioctyl sebacate (DOS) particles with a diameter of 0.1–, were used. The estimated results for the NaCl and DOS particles were within 10% of the data measured with the SMPS, while a 33% deviation from the SMPS results was obtained in Park et al. [(2007). Development and performance test of a unipolar diffusion charger for real-time measurements of submicron aerosol particles having a log-normal size distribution. Journal of Aerosol Science, 38, 420–430]. Furthermore, the detection time obtained with the use of our dual-charger system was faster () than the 5 s obtained by Park et al. [(2007). Development and performance test of a unipolar diffusion charger for real-time measurements of submicron aerosol particles having a log-normal size distribution. Journal of Aerosol Science, 38, 420–430]. 相似文献
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《分离科学与技术》2012,47(13):3476-3493
Abstract A unipolar charger containing multiple discharging wires in a tube (inner diameter: 50 mm) was developed and tested in order to increase the aerosol flow rate and the charging efficiency of nanoparticles. Four gold wires of 25 µm in diameter and 15 mm in length were used as the discharging electrodes to generate positive ions (Ni) from 2.72 × 108 ions/cc to 3.87 × 109 ions/cc in concentration at the discharging voltage of + 4.0 ~ + 10 KV. Monodisperse NaCl particles of 10 ~ 50 nm in diameter were used to test the charging efficiency and the particle loss of charged particles with different aerosol flow rates, corona voltages and sheath flow rates. The sheath air near the tube wall was found to increase the extrinsic charging efficiency, and the highest efficiency was obtained at + 6.0 KV discharging voltage, 10 L/min aerosol flow rate and 9 L/min sheath flow rate. The extrinsic charging efficiency increased from 10.6% to 74.2% when the particle diameter was increased from 10 to 50 nm. The TDMA (tandem differential mobility analyzer) method was used to determine the charge distribution and the mean charge per particle and it was found that the Fuchs charging theory corrected for the extrinsic charging efficiency matched with the experimental data very well. 相似文献
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根据手机充电器外壳结构和工艺分析,为提高塑料件成型的成品率、成型效率及表面质量,模具设计采用了点浇口注射系统。为降低模具工作难度,在模具设计过程中,合理优化了斜滑块的设计,解决了卡位孔对脱模的干涉。为简化模具结构,选择了合理的分型面,且采用了一模二腔结构,进而有利于批量化与自动化生产;为提高模具寿命,在模具的易磨损且复杂的地方,采用了高性能的模具钢材料且采用镶嵌式结构,同时也降低了模具加工难度。 相似文献
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以聚碳酸酯(PC)和ABS为基体树脂,添加增容剂、阻燃剂及其它助剂,经双螺杆挤出机熔融共混挤出造粒,制得PC/ABS手机充电器专用料:考察了原料配方和生产工艺对该专用料性能的影响。结果表明,生产的PC/ABS手机充电器专用料的各项性能达到了指标要求。 相似文献
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综述了用于医疗领域的塑料的特点、要求、应用现状和发展趋势 ,并根据人体的九大系统即循环、呼吸、消化、泌尿、运动、生殖、内分泌、神经和感觉系统 ,以及护理专科中使用的塑料类医疗器械等情况分类介绍 相似文献
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离子膜烧碱装置中的复杂控制系统 总被引:3,自引:0,他引:3
离子膜烧碱装置的控制系统比较多,比较复杂,本文介绍了其中的程序控制系统,再生用纯水流量控制系统,进电槽盐水流量控制系统,进电槽纯水流量控制系统,氯气-氢气压力控制系统几个复杂控制系统及其仪表选型。 相似文献
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羧基丁腈橡胶的硫化性能 总被引:4,自引:0,他引:4
用无硫硫化体系、低硫高促进剂硫化体系、普通硫黄硫化体系、过氧化物硫化体系、金属氧化物硫化体系和硫黄/金属氧化物硫化体系对羧基丁腈橡胶(XNBR)进行了硫化,研究了XNBR的硫化性能、物理机械性能、耐老化性能、压缩永久变形和耐油性能。结果表明,采用普通硫黄硫化体系、硫黄/金属氧化物硫化体系所得到的XNBR硫化胶的综合物理机械性能较好;用无硫硫化体系、低硫高促进剂硫化体系和硫黄/金属氧化物硫化体系所得到的XNBR硫化胶的耐老化性能较好;用硫黄/金属氧化物硫化体系所得到的XNBR硫化胶的耐磨性、压缩永久变形较好;用普通硫黄硫化体系和硫黄/金属氧化物硫化体系所得到的XNBR硫化胶的耐油性能较好。 相似文献