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Abstract: In the light of the problems of the air balance system of Model LCJ1250 chain drive pumping unit, it is proposed to change the air balance with counterweight balance, and three criteria for the modification is put forward:(1) ensuring the reliab
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文摘:针对LCJ1250气平衡式链条抽油机存在气平衡故障率高和现场维修困难等问题，提出将气平衡改造成工作可靠的重力平衡的方案，并确定了改造的三个原则：一是保证整机的可靠性，使抽油机运转平稳，振动噪音小，寿命长；二是力求降低生产成本，减少零部件制造，尽可能选用原来的通用件，舍去平衡缸和空气包等气平衡附件，在原往返架主体上悬挂一个配重箱；三是力求不改变冲程、冲次及最大悬点载荷等主要技术参数。 |
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Abstract: In the light of using coal characteristic of Neiyang steampowerstation,on the basis of inquiring into the dust-cleaning method,and meeting the concrete demand for running and repairing,the paper put for-ward the overall design of draft-dust in t
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文摘:针对耒阳电厂用煤特点，在探讨除尘方法的基础上，结合现场对运行和检修的具体要求，提出了翻车机室通风除尘系统的总体设计方案。 |
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Abstract: In the modern society of globalist characteristics, the idea of design art has been greatly changed by the means of high technology, and the whole level of design has also been raised, so that setting up a new thought of design art becomes a sub
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摘要:在这个具有全球化特征的现代社会，设计艺术的观念在高科技手段的驱动下发生着深刻的变化，设计的整体水平已被提高到一个新的高度，开创设计艺术思路已成为时代的课题。 |
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Abstract: In the operation beginning of the tandem rolling mill reduction gears being overhauled,the magnitude of the vibration is t oo large.This paper introduces a method of the vibration diagnosis of the reduct ion gears and explains the fault cause.It
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文摘:针对连轧机组减速机在检修后开始工作中，产生较大振动这一异常现象进行了诊断与分析，从而找出了产生这一故障的原因，更换故障件后得到证实，诊断是正确的. |
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Abstract: In the paper a kind of new idea based on electric field theory is advanced,which is used in research of forming law of electrochmeical perforation with fixed cathode.According to it,the changing law of electric intensity,current density,velocity
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文摘:根据电场理论，提出了一种研究固定阴极电化学射孔成形规律的新的处理方法，分析了该加工方式下阴极表面电荷密度及加工区的电场强度、电流密度、加工速度等在加工过程中的变化规律，为这种简易加工方式的合理应用提供了严密的理论依据。 |
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Abstract: In the paper the deterrent content and the concentration of diphenylamine dibuty l phthalate and centralite Ⅱ in finished product manufactured by two different methods were analyzed by high performance liquid chromatography, which can provi dere
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文摘:利用高效液相色谱仪分别测定了发射药在两种制备工艺中的钝感剂邻苯二甲酸二丁酯和二号中定剂的含量及邻苯二甲酸二丁酸在其中的浓度梯度分布，为调整发射药制备工艺提供了参考。 |
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Abstract: In the paper, bifurcation phenomena of one kind of reaction-diffusion equations are investigated. Used singularity theory based on the method of L-S(Liapunov-Schmidt), satisfactory results are obtained.
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文摘:文章讨论了一类反应扩散方程的分歧(分岔)现象.运用所谓基于L-S(李雅普诺夫-施密特)约化的奇异理论方法,得到了满意的结果. |
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Abstract: In the paper, the hot crack for the forging die made by methodsof squeeze casting is analyzed, how to reduce the hot crack is also given out.
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文摘:从生产实际出发，分析了锻模液态模锻成形过程中热裂纹形成的主要原因，提出了降低锻模热裂纹的几点措施。 |
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Abstract: In the paper,technical modification of the heating furnace attached to the Broad and Thick Plate Plant in Jigang is presented,which includes the analysis of existing problems of the furnace before modification,and modification measures and using
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文摘:介绍了济钢宽厚板加热炉的技术改造情况，内容包括改造前炉子存在问题的分析，炉顶及滑轨等部位的改造措施和使用效果等。 |
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Abstract: In the paper,the concept of respirable dust and elemental demend of experimental respirable dust were introduced,the production method of respirable dust was studied,and the efficiency was tested and analysed.
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文摘:介绍了呼吸性粉尘的概念，试验粉尘的基本要求，研究了试验呼吸性粉尘的制备方法，并对研制的滤料阻尘效果进行了测试分析。 |
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Abstract: In the paper,the types,characteristics,planning and evolution of wetland ecosystem in Yellow River Delta have been analyzed,and its protection has been discussed.
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文摘:本文对黄河三角洲湿地生态系统的类型、特征、演替、演化进行了分析，并探讨了有关保护对策。 |
