共查询到20条相似文献,搜索用时 54 毫秒
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循环水泵是电厂重要的辅机设备,直接影响循环冷却水系统及机组的安全和经济运行.本文对某电厂二期卧式循环水泵试运行过程中发生振动情况进行了介绍,对振动原因进行分析和判断,并提出相应的处理措施,希望为同类型泵的故障诊断及处理提供有益借鉴. 相似文献
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针对某CPR1000核电机组因循环海水泵的下部滚动轴承振动大、存在紧急降负荷运行或停运的风险,开展了振动故障诊断与趋势分析。通过分析该BCV 285型循环海水泵运行中的振动尖峰能量信号和振动速度均方根信号,发现该轴承外环滚道存在局部剥落且发生共振是海水泵振动大的主要原因。通过采取强化轴承的润滑和加强基础刚度等措施,减小了海水泵的共振响应。实践表明,实时监测振动速度均方根值的变化趋势可以指导该型循环海水泵的安全运行。 相似文献
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岭澳核电站循环水泵气囊密封损坏机理分析 总被引:1,自引:1,他引:1
岭澳核电站在循环水泵调试及试运行期间,在短短的三个月时间内,损坏了两台水泵的气囊密封,检修过程耗费了大量的人力物力。如果该故障发生在机组运行期间,就会影响机组的稳定运行,甚至会带来巨大的经济损失。本文以气囊密封试验台架的试验结果为依据,通过理论计算证明,循环水泵的气囊密封设计存在致命缺陷,提出了运行和维修操作防范措施,以避免故障的重复发生。 相似文献
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北海电厂四台循环水泵自2005年投产运行以来,循环水泵运行不稳定,振动超标是主要问题,进行了多次检修和调整,但循环水泵运行振动超标始终没有解决,成为电厂安全运行生产的薄弱环节,需要对循环水泵进行大的技术改造,提出了解决振动、提高效率、降低能耗的方法。 相似文献
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基于泵控泵(PCP)技术的一控三泵控泵注水泵站系统,综合应用摘段调节、变速调节和泵的串联改变注水系统的特性曲线,使大功率多级高压离心泵始终在高效区工作,实现注水泵输出压力和流量可调,能达到节能降耗的目的并实现多种工况组合备用。实际应用表明,该系统降低了泵管压差和注水电耗,提高了注水效率,有效地解决了油田注水电耗大的问题。 相似文献
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由于医院需要具有24 h热水供应能力,如何在满足使用需求的情况下节能减排,通过项目实际设计过程,提出了热泵冷凝热回收加热生活热水的解决方案,介绍了多功能热泵冷热水机组空调系统方案设计思路与国外运行案例数据的分析。 相似文献
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The life of auto water-pump bearing is closely related to its loads which are affected by the eccentric unbalances of rotational components in the structure system of the bearing. However, since the bearing structure in auto water-pump is complicated, the exact load calculations and the life prediction for this kind of bearing are difficult. In this paper, the WR3258152 auto water-pump bearing is investigated. The load and life calculation models for the bearing are developed with considering the eccentric unbalances of the cooling fan and the driving wheel. The influences of the fan and the wheel unbalances on the loads and life of the bearing are studied. The calculation and analysis results show that the radial loads on rolling element rows of the auto water-pump bearing fluctuate significantly under the actions of the fan and the wheel unbalances and the bearing life reduces regularly with the eccentric unbalances changing. 相似文献
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组合式压电驱动芯片水冷系统 总被引:1,自引:0,他引:1
为了提高压电驱动芯片水冷系统的适用性、可维护性以及冷却效率,本文提出一种组合式压电驱动芯片水冷系统。首先,测试和分析了芯片水冷系统中组合式泵单元在220Vpp方波驱动下不同组合方式(串/并联)、泵工作数量以及相对位置时的输出性能,接着,基于组合式泵单元的试验结果进行芯片水冷系统的水冷效果研究。实验结果表明:串联组合双泵工作时,双泵位于串联组合首尾位置(AD)时性能较优,在30Hz时获得最大输出压力(25kPa);串联组合四泵工作时,分别在35Hz和55Hz获得了最大压力(23.5kPa)和最大流量(13.5mL/min);并联组合双泵工作时,双泵都位于组合首位(AC)时性能较差;并联组合四泵工作时,分别在50Hz和60Hz获得最大输出流量(22mL/min)和最大输出压力(12.6kPa);通过串并联以及泵工作数量的切换获得了芯片水冷系统的冷却效果,不同的组合方式以及泵工作数量可以获得不同的冷却效果。获得了组合式压电驱动芯片水冷系统的驱动参数,为计算机芯片有效散热提供一条新途径。 相似文献
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针对引大灌区小型水利调蓄工程的不同形式,结合农业灌溉、养殖业及二三产业的用水特点,阐述了水泵的选型与配套方法,提出了推荐机型和应用方法,为灌区发展多种节水灌溉形式提供指导,对加快灌区农业节水技术的推广具有重要意义。 相似文献
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The current research of hydrodynamic bearing in blood pump mainly focuses on the bearing structure design.Compared with the typical plane slider bearing and Rayleigh step bearing,spiral groove bearing has excellent performance in load-carrying capacity.However,the load-carrying capacity would decrease significantly with increasing flow rate in conventional designs.In this paper,the special treatment is made to the upper spiral groove bearing to make sure that both the circulatory flowing and load-carrying capacity are high.Three-dimensional computational fluid dynamics(CFD) models in the space between rotor and shaft are developed by using FLUENT software.Effects of groove number,film height and groove depth on load-carrying capacity of the spiral groove bearings are investigated by orthogonal experiment design.The experimental results show that film height is the most remarkable factor to the load-carrying capacity.The variation tendency of load-carrying capacity reveals that the best combination of geometry is the one with groove number of 8,film height 0.03 mm and groove depth 0.08 mm.The velocity and pressure distributions in spiral groove bearings are also analyzed,and the analysis result shows that the distributions are in conformity with the design of the blood pump based on the principle of hydrodynamic bearing.The displacement of the rotor with the best combination parameters is tested by using laser displacement sensors,the testing result shows that the suspending performance is satisfactory both in axial and radial directions.This research proposes a bearing design method which has sufficient load-carrying capacity to support rotor as an effective passive hydrodynamic bearing. 相似文献
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高压清水阀是浆体输送设备水隔泵的重要控制阀门,在生产过程中发现清水阀在开启的瞬间引起水锤现象,使罐体和阀门受到冲击,由此引发整个系统的强烈振动,产生噪音,最后导致该阀的使用寿命降低.对该振动现象进行了理论分析,提出了解决振动的卸荷措施,并对其结构进行了改进设计研究. 相似文献