共查询到19条相似文献,搜索用时 62 毫秒
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对首套国产化全高压法“三合一”机组做了经济性分析,并与引进的国外二手设备做了比较,证明其完全满足工艺要求,在应用中取得了良好的效果。 相似文献
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本文就一台工业尾气透平膨胀机试车过程中的振动故障,依据试车频谱及轴心轨迹等试车数据,以理论分析和经验判断对该故障进行了诊断与分析,从机组结构、平衡方式、装配工艺、轴承间隙等方面查找原因,并采取相应的改进措施,成功排除了振动故障。 相似文献
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为提高硝酸装置四合一压缩机组的运行稳定性,用户从机组的设计阶段开始,全面考虑提高安装运行质量的措施。从设计到安装、开车调试以及提高机组运行可控度等方面进行改进,并推动实施,其结果机组安装开车十分顺利,经专家评定,装置运行处于国内领先水平。 相似文献
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阐述了首套国产硝酸四合一机组的技术特点和总体设计特点。介绍了该机组的运行情况,并说明了在实际应用中存在的问题。指出了应用该机组的现实意义。 相似文献
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In industrial gas volume measurement, the reliable, precise and economically efficient determination of gas quantities by measurement is of utmost importance. Standby meter sections, Z-connection and permanent series connection of two gas meters of different designs are state of the art [Schmittner, D., The importance of the accuracy of measurement for industrial gas measurements. 3R International, Vol. 30, No. 6–7, 1991, pp. 338–343 (in German)]. The permanent or temporary series connection for the comparison and test section makes expenses for a second complete measuring device necessary. An alternative at present is the dismounting of the gas meter and the check test in an appropriate high-pressure test facility. A test according to requirements, using a non-interacting measuring instrument which should be transportable, if possible, and usable with other gas meters can be a bridge between these two possibilities. To prove this, measurements with an LDA system were carried out in a natural gas high-pressure pipeline upstream of a turbine gas meter. After extensive profile and single-point measurements have been made it can be said that this test by the single-point method is feasible with an uncertainty of ≤ ± 0.5%, providing defined prerequisites are met. 相似文献
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针对某化工企业用合成气汽轮机高参数、高转速、高功率等要求的问题,基于透平热力学理论,提出了一种反动式工业汽轮机设计方案。使用透平强度理论对汽轮机直叶片的应力进行了详细计算,使用有限元分析对调节级叶片、末级扭叶片的应力进行了详细研究,使用转子动力学理论对汽轮机转子4种不同振型的不平衡响应振动进行了详细分析。利用动平衡机对转子进行了高速动平衡试验,同时通过汽轮机空负荷试验,检查了转子的实际振动情况。试验结果表明,汽轮机的功率与转速均满足用户的要求,叶片的应力在许用范围之内,叶片强度满足要求,转子的临界转速具有足够的避开余量,转子的振幅不超过25μm,符合API612的要求;该设计方案可满足用户的要求,能广泛满足合成气压缩机的驱动需求。 相似文献
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随着燃气轮机的广泛运用,提高燃气轮机可靠性已经成为十分关注的问题。根据燃气轮机的基本工作原理,对其可靠性的影响因素进行了简单的分析,并就提高其可靠性措施做了简单描述。 相似文献
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《Wear》2002,252(3-4):264-268
The first-stage blades of a gas turbine had suffered a severe deterioration after around 10 500 h service. The expected service life was 40 000 h. Failure analysis (visual observations, studies by optical microscopy, scanning electron microscopy (SEM), SEM back-scattered electron (SEM-BSE), EDX, X-ray diffraction (XRD) and dimensional metrology) has been carried out. Blades, manufactured in the nickel superalloy CMSX-4, lost the protective coatings from their tips due to wear. Unprotected surfaces suffered high-temperature hot corrosion (Type-I corrosion). It is concluded that failure was mainly caused by an uneven clearance (out-of-line) between rotor and lining. 相似文献
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针对国内新型高温高压汽轮机汽封片在高温环境下长期工作时容易出现高温蠕变、腐蚀,进而产生汽封片崩裂脱落造成汽轮机效率降低甚至出现运行事故的问题,对国内新型高温高压汽轮机汽封片选用的几种不锈钢材料从金属材料学方面进行了对比分析,并结合国际上在高温高压汽轮机汽封片材料选用方面的先进研究与应用,专门探讨了多种奥氏体不锈钢和马氏体不锈钢的材料特点,研究分析了不同不锈钢材料对新型高温高压汽轮机汽封片工作环境的适用性。研究结果表明,奥氏体不锈钢06Cr18Ni11Ti较1Cr18Ni9Ti和06Cr19Ni10更适合作为新型高温高压汽轮机汽封片选用材料,如果在条件允许的情况下,选用回火索氏体不锈钢,如X20Cr Mo13或者类似化学成份的马氏体不锈钢,作为新型高温高压汽轮机汽封片是目前最优选择。 相似文献
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燃气轮机研制是一个复杂的系统工程,需要众多不同类型、不同性质和不同研制合作方式的供应商共同完成,对研制项目管理而言,如何对异质供应商绩效进行评价是一个亟待解决的问题.针对此问题,首先将供应商按照特性分为技术供应商和物料供应商,然后构建了包括质量、成本、交付、技术和合作服务在内的指标体系,并提出了基于网络分析法(Analytic Network Process,ANP)和逼近理想解排序法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)的异质供应商绩效评价方法,通过ANP确定各级指标权重,借助TOPSIS消除指标量纲差异,最后应用示例分析,验证了该方法对复杂装备研制中异质供应商绩效评价的可行性和有效性. 相似文献