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本文采用质量代换法对陶瓷隔膜泵设计中曲柄连杆机构部分进行了动态力分析,对以曲柄连杆作为传动部分的机械,其振动与平衡以及曲柄连杆处的轴承寿命计算提供了一定的计算方法。 相似文献
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本文采用质量代换法对陶瓷隔膜设计中曲柄连杆机构部分进行了动态分析,对以曲柄连杆作为传动部分的机构,其振动与平衡以及曲柄连杆处的轴承寿命计算提出了一定的计算方法。 相似文献
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机立窑转速较慢,立轴下部3003156轴承不易损坏 ,不过一旦损坏,其后果与主轴上部轴承损坏一样 ,造成立窑停产。采用常规的更换方法至少需20d ,在水泥生产销售旺季立窑停产 ,经济损失十分惨重。对此 ,我们采用轴瓦代替原轴承 ,此法不仅成本低、简单易行 ,而且大大缩短了更换时间。1用轴瓦代替下部轴承的可行性分析3003156轴承结构装配图如图1所示。1)因3003156轴承为双列向心球面滚子轴承 ,可承受一定的轴向力 ,但实际工作中其所受的径向力远远大于轴向力。图1立轴下部轴承装配结构图2)3003156轴承被… 相似文献
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我厂在新的生料系统选用了三台φ2.4×13m中心传动湿法原料磨,其主轴承采用动静压轴承,自投入使用几年来,效果令人满意,现谈谈我们的认识和感受。 滑动主轴承根据形成润滑油膜的方式可分为动压主轴承和动静压主轴承两大类。我国目前的磨机主轴承大部分是采用动压润滑的轴承,近期来动静压主轴承的应用也越来越多,特别是大中型磨机更是得到较广泛的应用。 相似文献
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<正>1概述矿渣立磨是矿粉系统的主要设备,主磨辊是矿渣立磨的核心研磨部件。我公司生产的矿渣立磨主磨辊主要组成,见图1(不含辊套),该主磨辊采用双列圆锥滚子轴承和单列圆柱滚子轴承组合配置方式。由于主磨辊倾斜安装,双列圆锥滚子轴承承受 相似文献
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1主风机轴承润滑冷却系统改造我公司主风机结构示意见图1(不包含虚线部分),其中#1、#2轴承润滑冷却采用了得力士46的润滑油。出于对设备安全考虑,我们设定轴承报警温度80℃,到95℃主风机自动跳停以保护设备。生产中春秋冬三季运行正常,但一到每年的夏季,随着气温升高,主风机轴承温度不断升高,经常达到95℃而导致主风机跳停,严重影响生产。 相似文献
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阐述了一种用于过程强化的专利技术及其装置;介绍了该专利技术的特色;分析了该专利技术中曲柄连杆机构的运动规律。 相似文献
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本文借助于CAD技术、利用计算机对杠杆式抽油机的连杆机构进行了仿真模拟,精确计算出了其悬点加速度与扭矩因数。应用实测地面功图与现场测量的曲柄平衡参数、经计算得到了"抽油机井的实际扭矩曲线",填补了油田此项技术的空白。通过对"抽油机井实际扭矩曲线"的分析与研究,揭示了机采举升能耗合理匹配的基础理论,总结出了应用"实际扭矩曲线"来调整抽油机井平衡的基本方法,夯实了"地面功图与电机能耗"相互转换的理论基础。为进一步提升油田机采举升管理水平与实现数字化油田建设目标提供了有力的技术支持。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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The miscibility of various amorphous polybutadienes with mixed microstructures of 1,4 addition units (cis, 1,4 and trans 1,4) and 1,2 addition units have been investigated. The studies here involved optical transparency, differential scanning calorimetry, and small angle light scattering. It was found that a 90 percent (cis) 1, 4 addition polybutadiene was immiscible with high (91 percent) 1,2 addition polybutadiene. Reduction of the 1,2 content to 71 percent induced an upper critical solution temperature (UCST) with the cis 1,4 polymer. Polybutadienes with 50 percent and 10 percent 1,2 contents were miscible above the crystalline melting temperature of the cis 1,4 polybutadiene. Immiscibility of the 91 percent 1,2 addition polymer was also found with a 10 percent 1,2 polybutadiene. The latter polymer also exhibits an UCST with the 71 percent 1,2 polymer. The results are used to interpret the characteristics of blends of polybutadienes of varying microstructure. 相似文献
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以F类粉煤灰为例,详细介绍了测定粉煤灰中烧失量的步骤、计算数学模型、影响测量不确定度的因素以及各项测量不确定度分量评定,人员、设备、材料、方法、环境都是影响测量不确定的因素。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献