空压机电机电刷过热跳火故障原因分析及预防

分析了空压机同步电机集电环、电刷过热和跳火的原因,并提出了一系列处理方法和预防措施,以保证空压机安全、稳定运行。     

机械松动故障的诊断

本文论述了机械松动造成机组振动的故障原因和故障特征,通过对一台空压机机组的驱动电机松动故障的成功诊断实例介绍,论证了根据故障特征判断机械松动故障方法的有效性。该方法的使用能准确地得出诊断结论,对指导现场维修具有积极的作用     

RIKT112-4型空压机同步电机基础安全隐患的消除

针对马钢40000 m3/h空分设备配套RIKT112-4型空压机同步电机的基础振动大、电机轴承座漏油严重的问题,利用空压机大修机会,分析原因,制定整改措施,消除了影响空压机组稳定运行的隐患,提升机组运行可靠性。详细介绍整改措施、实施方案和效果。     

提高同步电机抗电网电压波动能力的成功实践

60000 m3/h空分设备空压机因同步电机抗电网电压波动能力差而跳车,影响氧、氮、氩产品的安全生产和稳定供应。将常用励磁电源改为UPS稳压电源后,大大提高了同步电机抗电网电压波动的能力。介绍供电电源优化改造前同步电机的运行状况,阐述优化改造的理论依据和具体改造方案。     

空压机叶轮结垢原因及处理措施

通过对新空分装置空压机近年来运行和故障的分析,得出造成空压机叶轮结垢的主要原因是机组进口过滤器的过滤效果差、空压机级间管道和冷却器内壁锈蚀。分析引起故障的原因,并采取相应的措施,实现空压机长周期稳定运行。     

多台螺杆式空压机并联运行的节能

文章通过实测数据资料对比，论述了变速驱动螺杆式空压机的节能效果，叙述了多台普通空压机和1台变速驱动空压机并联运行并由变速驱动为主的控制方法，提出实际应用的方法。     

空压机二级振动异常的原因分析与处理

介绍一起空压机二级振动异常的故障,分析了故障原因,通过安装空压机叶轮在线清洗系统解决了叶轮结垢问题,保证空压机安全运行。     

空压机ZR750低压机头LP转子驱动齿轮断裂分析

通过对空压机ZR750低压机头LP转子驱动齿轮断裂部位进行理化检测和分析,推断其失效原因为在机器发生故障后仍反复强行运转,致使承受很大的冲击和弯曲应力,导致在应力集中的齿轮齿根部位产生了断裂。     

60000m~3/h空分设备空压机停车故障分析与处理

由于60000 m3/h空分设备配套的VK200-3型空压机导叶开度偏差控制故障和一级导叶无规律窜动,导致空压机因一级轴振动超标而停车。通过改造空压机导叶控制和将二、三级导叶开度固定在100%而彻底排除了故障,确保了空分设备安全、稳定运行。简介VK200-3型空压机结构,详细介绍停车故障的分析和处理过程。     

制约空压机长周期运行的因素及处理措施

通过对引进C150MX3型空压机近几年来的运行和故障情况的分析,得出制约空压机长周期运行的3个因素:冷却器结垢、扩压器腐蚀和二级振动值高。分析了引起故障的原因,并采取了相应措施,实现空压机长周期稳定运行。     

浅析高压蒸汽管道吹扫注意事项

随着空分装置朝着大型化方向的发展,压缩机组对于原动电机的制造要求越来越高;加之地球能源的不断枯竭,节能降耗也越来越被人们所重视。利用一次能源的工业汽轮机代替大型电机做压缩机组的原动机已经逐渐成为一种发展趋势。汽轮机进口高压蒸汽管线的吹扫工作成为压缩机组试车前一项重要工作。     

变频空调用无稀土磁阻电机的退磁仿真及验证

在以往的变频空调中,压缩机电机常采用高效节能的稀土永磁同步电机,但稀土价格的上涨使其在空调中的继续应用受到限制。无稀土磁材的永磁辅助式同步磁阻电机（无稀土磁阻电机）成本低廉,性能可与稀土永磁同步电机相媲美,在空调上具有很好的应用前景,但因无稀土磁材磁性能较弱,电机抗退磁能力较差而难以系列化生产。本文借助Ansoft软件对无稀土磁阻电机的退磁情况进行仿真,并与等效磁路法计算结果及实测结果进行对比。结果表明,采用三维瞬态场的动态退磁仿真结果与实测值很接近,该仿真方法能够很好地反映电机实际的抗退磁能力,在缩短开发周期、降低开发成本方面效果显著。     

空压机控制回路的改进

对莱钢4套22000m3/h空分设备配套空压机电动机控制回路中存在的问题进行分析,提出了相应的改进措施,确保机组稳定运行。     

美的电冰箱厂空压站空气冷冻干燥机故障维修与改进

针对空压干燥机组开机时总开关跳闸的故障现象进行分析检查,得出是冷冻干燥机制冷压缩机电机烧毁造成的。然后分析制冷压缩机烧毁的原因并对冷却水系统进行改进,最后空压干燥机组运行正常。     

Effects of the driving voltage waveform on the performance of the Stirling-type pulse tube cryocooler driven by the moving-coil linear compressor

The effects of three typical waveforms, namely, sine, trapezoid and smeared sine, on the performance of the Stirling-type pulse tube cryocooler (SPTC) driven by the moving-coil linear compressor are analyzed and studied experimentally. The results indicate that the dynamic pressure at the inlet of the cold finger has a weak relation with the driving voltage waveform, but the latter plays an important role in affecting both the motor efficiency and the SPTC cooling performance. In the tested range, either the cooling efficiency or the motor efficiency under the smeared sine waveform is the highest, while that under the sine waveform is the lowest. Moreover, given that the input power is below 30 W, the motor efficiencies under both smeared sine and trapezoid waveforms exceed 90%, which suggests a promising approach to achieve a linear compressor with a very high motor efficiency by optimizing the voltage waveform.     

透平压缩机油箱真空喷射装置的应用

以SVK8-3S型氮压机的实际运行情况为例,分析了主电机轴承温度偏高、齿轮箱内产生的大量油雾排放到室外对空压机入口空气造成污染,以及随着烟雾排放掉部分润滑油而造成能源的浪费等问题,通过原因分析,提出了解决办法,通过加装真空喷射装置提高了氮压机的性能,节约了能源。     

Modeling and experimental evaluation of an automotive air conditioning system with a variable capacity compressor

A steady state computer simulation model has been developed for refrigeration circuits of automobile air conditioning systems. The simulation model includes a variable capacity compressor and a thermostatic expansion valve in addition to the evaporator and micro channel parallel flow condenser. An experimental bench made up of original components from the air conditioning system of a compact passenger vehicle has been developed in order to check results from the model. The refrigeration circuit was equipped with a variable capacity compressor run by an electric motor controlled by a frequency converter. Effects on system performance of such operational parameters as compressor speed, return air in the evaporator and condensing air temperatures have been experimentally evaluated and simulated by means of developed model. Model results deviate from the experimentally obtained within a 20% range though most of them are within a 10% range. Effects of the refrigerant inventory have also been experimentally evaluated with results showing no effects on system performance over a wide range of refrigerant charges.