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通过对汽轮机转子的加工制造图纸及实际工况研究,设计了用于加工汽轮机转子轮槽的支撑和分度用数控汽轮机转子轮槽中心支架,使汽轮机转子转槽中心支架的加工精度及效率大大提高。 相似文献
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现阶段,电机被广泛应用于烟机设备中,成为烟机的核心部件。与常用工具相比,特殊设备在对电机转子轴承拆卸方面节约了大量的人力物力,所以为解决烟机维修作业中遇到的电机转子轴承拆卸问题,需要研制一种针对毕节厂一车间现有烟机设备上,7.5 kW以下电机转子轴承的拆卸工装,并阐述该工装的结构特点和工作原理。实际应用表明,该工装可有效降低对轴承的损伤,同时具有操作简单、作业效率高、省时省力及劳动强度低的优点。 相似文献
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该文主要介绍了汽轮机整锻转子平衡孔的加工,通过对产品结构及现有工艺方法的分析、改进,设计了新的加工工装,在达到图纸要求的情况下,增强了加工工装的通用性,大大降低了工装成本。 相似文献
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1 引言 转子是汽轮机关键部件之一,其加工质量直接关系到汽轮机性能.而转子加工中最为关键、最为困难的是轮槽的加工,保证了轮槽的加工质量,就从根本上保证了转子的加工质量. 相似文献
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郑淑华 《现代制造技术与装备》2019,(7)
汽轮机作为一种特殊蒸汽动力装置,是火力发电厂的重要设备,其运行状态直接影响着火力发电整体效率与质量。因此,火力发电厂运行中,要密切关注汽轮机运行状态,避免出现运行故障。在汽轮机运行中,转子弯曲是较为普遍的问题,该故障会造成严重危害,加大汽轮机运行安全威胁,提高了设备检修与维护成本。基于此,从转子弯曲原理出发,分析了某汽轮机机组运行情况,并得出了相关预控措施,旨在提高机组运行可靠性与安全性。 相似文献
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如果机械设备工作受到各种因素影响,可使运行状态发生变化,导致故障。为杜绝事故发生,需要在事故发生之前对机械设备进行故障诊断。转子是旋转机械的核心部件,整个旋转机械能否正常运行,取决于转子的运动状态。采用vibroM et 500型激光多普勒测振仪对DM1007仪用加工中心进行振动测试,通过QLV型虚拟式信号分析仪库得到并分析转子径向振动的频谱图。 相似文献
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Micro-gas turbine engine(MTE) rotor is an important indicator of its property, therefore, the manufacturing technology of the microminiature rotor has become a hot area of research at home and abroad. At present, the main manufacturing technologies of the MTE rotor are directed forming fabrication technologies. However, these technologies have a series of problems, such as complex processing technology high manufacturing cost, and low processing efficiency, and so on. This paper takes advantage of micro electric discharge machining(micro-EDM) in the field of microminiature molds manufacturing, organizes many processing technologies of micro-EDM reasonably to improve processing accuracy, presents an integrated micro-EDM technology and its process flow to fabricate MTE rotor die, and conducts a series of experiments to verify efficiency of this integrated micro-EDM. The experiments results show that the MTE rotor die has sharp outline and ensure the good consistency of MTE rotor blades. Meanwhile, the MTE rotor die is applied to micro extrusion equipment, and technologies of micro-EDM and micro forming machining are combined based on the idea of the molds manufacturing, so the MTE rotor with higher aspect ratio and better consistency of blades can be manufactured efficiently. This research presents an integrated micro-EDM technology and its process flow, which promotes the practical process of MTE effectively. 相似文献
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针对某F级重型燃气轮机,根据机组的实际运行监测数据,提取得到该机组在冷态启动、热态启动两种工况下各测点温度随时间的变化曲线,分析得到转子各处的换热边界条件,采用有限元方法计算该燃气轮机转子在不同启动工况下的整机瞬态温度场及应力场,并基于该瞬态热应力分析结果对转子的低周疲劳寿命损耗进行评估。计算结果表明:最大热弹性应力值一般都出现在透平第一级轮盘的出气侧底部圆角处及压气机后三级轮盘的中间部位的圆角区域;气流参数变化的快慢对转子应力分布影响极大;冷态启动一次的寿命损耗最高达0.02%,大于热态启动的对应值。研究结果为轮盘结构设计与机组运行规程的优化提供了重要参考。 相似文献
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为了提高汽轮机转子故障诊断的准确率和识别效率,提出了一种基于混沌的生物地理学优化算法(biogeography-based optimization with chaos,简称CS-BBO)和支持向量机(support vector machine,简称SVM)相结合的故障诊断方法。首先,将混沌理论引入到生物地理学优化算法(biogeography-based optimization,简称BBO)中,得到CS-BBO算法;其次,通过CS-BBO算法优化SVM得到诊断模型的最优参数,增强SVM的学习能力和泛化能力;最后,通过ZT-3转子试验台模拟汽轮机转子故障,利用得到的4种状态下的试验数据验证优化模型的有效性。结果表明:CS-BBO算法优化SVM的模型可以准确、高效地对汽轮机转子进行故障诊断;与BBO算法优化SVM模型相比,该方法的故障诊断准确率和识别效率更高。 相似文献
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汽轮发电机的不平衡负载将使转子感应出两倍工频(100 Hz)的涡流,引起转子铁芯及其阻尼电路的发热,从而限制了发电机的负序能力。利用复数表面阻抗的概念给出了转子负序涡流场的分析方法。在此基础上,以转子极面加阻尼系统的300 MW汽轮发电机为例,计算了发电机稳态负序运行时转子上的涡流分布和损耗分布。根据计算结果,讨论了转子极面加阻尼系统对提高发电机负序能力所起的作用。 相似文献
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Soo-Yong Cho Tae-Hwan Cho Sang-Kyu Choi 《Journal of Mechanical Science and Technology》2005,19(7):1478-1487
A small mixed-type turbine with a diameter of 19.9 mm has been substituted for a rotational part of pencil-type air tool.
Usually, a vane-type rotor is applied to the rotational part of the air tool. However, the vane-type rotor has some problems,
such as friction, abrasion, and necessity of accurate assembly etc.,. These problems make the life time of the vane-type air
tool short, but air tools operated by mixed-type turbines are free of friction and abrasion because the turbine rotor dose
not contact with the casing. Moreover, it is assembled easily because of no axis offset. These characteristics are merits
for using air tools, but loss of power is inevitable on a non-contacting type rotor due to flow loss, tip clearance loss,
and profile loss etc.,. In this study, four different rotors are tested, and their characteristics are investigated by measuring
the specific output power. Additionally, optimum nozzle location against the rotor is studied. Output powers are obtained
through measured pressure, temperature, torque, rotational speed, and flow rate. The experimental results obtained with four
different rotors show that the rotor blade shape greatly influences to the performance, and the optimum nozzlc location exists
near the mid span of the rotor. 相似文献