共查询到19条相似文献,搜索用时 156 毫秒
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在工业生产中,尤其是在使用过大尺寸离心泵的场合,离心泵很难运行在最佳状态,因而提出了泵叶轮削减法来提高离心泵的运行性能。通过对1台离心泵的叶轮进行7次削减测试,用实验的方法总结了叶轮削减对于离心泵最高效能点的影响。此方法成功解决了因尺寸过大或节流导致超压的问题,效果显著,具有重要的应用价值。 相似文献
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离心泵的反转是影响其安全运行的一个重大隐患,因其反转而引发的事故屡见不鲜。因此,在离心泵的运行工作中,应特别注意泵的反转问题,做好相应的防范工作。离心泵的反转可分为主动反转和被动反转。离心泵不正常的反转都会对离心泵、电动机、现场输送管路等造成重大损害。为保证离心泵机组的安全运行,可以通过改进工程设计、增加管路辅助装置、合理操作运行等方法来进行防范。在实际运用中,应根据实际情况,充分考虑离心泵反转问题,尽可能采用经济适用、安全可行的防范措施,以提高离心泵机组运行的可靠性。 相似文献
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《现代制造技术与装备》2020,(5)
基于对离心泵振动分析和预防措施的研究,阐述离心泵振动超标存在的危害,分析泵轴、联轴器是造成离心泵振动的重要原因,最后为将离心泵振动情况控制在有效范围内,给出加强设计、制造与选型工作、加强安装与维护工作等预防措施。 相似文献
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大型离心泵在额定工况下的机械动特性研究 总被引:5,自引:1,他引:4
介绍大型离心泵在额定工况下的机械动特性研究,针对工业运行的大型离心泵,提供了一种在线检测和实时信号处理的方案。介绍了对大型离心泵工作状态评定的标准,提出了以机械动特性为手段对大型离心泵进行故障预报和智能分析的方法。 相似文献
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高扬程大流量卧式离心泵运行中存在工况点偏离,效率低下,耗电量大等问题,通过三元流技术对叶轮重新设计制造,在原有水泵及配套电机不变的情况下只更换叶轮,运行中进行参数测试比较,水泵运行效率明显提高,达到显著的节能效果。同时为同类型水泵及系统的高效节能改造提供借鉴途径。 相似文献
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离心泵是制药的重要通用设备,而汽蚀对离心泵的危害很大,它使离心泵的性能下降、使过流部件点蚀、甚至产生振动和噪音,严重地影响离心泵正常工作。在实际生产应用中,从设计、选用、安装和运行几方面综合考虑,以提高了离心泵的抗汽蚀能力。 相似文献
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Centrifugal pumps are present in the daily life of human beings. They are essential to several industrial processes that transport single- and multi-phase flows with the presence of water, gases, and emulsions, for example. When pumping low-viscous liquids, the flow behavior in impellers and diffusers may affect the centrifugal pump performance. For these flows, complex structures promote instabilities and inefficiencies that may represent a waste of energetic and financial resources. In this context, this paper aims at characterizing single-phase water flows in one complete stage of a centrifugal pump to improve our understanding of the relationship between flow behavior and pump performance. For that, a transparent pump prototype was designed, manufactured and installed in a test facility, and experiments using particle image velocimetry (PIV) were conducted at different conditions. The acquired images were then processed to obtain instantaneous flow fields, from which the flow characteristics were determined. Our results indicate that the flow morphology depends on the rotational speed of the impeller and water flow rate: (i) the flow is uniform when the pump works at the best efficiency point (BEP), with streamlines aligned with the blades, and low vorticity and turbulence in the impeller; (ii) the velocity field becomes complex as the pump begins to operate at off-design conditions, away from BEP. In this case, velocity fluctuations and energy losses due to turbulence increase to higher numbers. Those results bring new insights into the problem, helping validate numerical simulations, propose mathematical models, and improve the design of new impellers. 相似文献
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离心泵故障在化工企业中非常多见,按故障发生的原因可分为离心泵本身机械故障和循环系统引起的泵故障。本文着重就引起离心泵故障的几种常见工艺系统原因进行了探讨,并提出了简单易行的解决方法。 相似文献
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文中在离心泵叶轮传统设计原理的基础上,利用简单的数值计算方法,快速准确地绘制出了叶轮的轴面流道,从而很好地解决了泵CAD系统中的关键问题. 相似文献
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In this work, gas–liquid distributions in an industrial centrifugal pump operated at various steady state conditions have been quantitatively determined. Therefore, high-resolution gamma-ray computed tomography (HireCT) has been applied, operated in time-averaging rotation-synchronized CT scanning mode. Detailed studies have been performed on a hydraulic test facility providing authentic operating conditions for industrial centrifugal pumps. The gas phase distribution in the centrifugal pump has been studied for swirling gas–liquid two-phase flow as an inlet flow regime and at defined inlet gas volumetric flow rates between 0% and 5%. In this way, the influence of the inlet flow boundary conditions on the performance of the centrifugal pump as well as the gas holdup distribution within the impeller region could be successfully determined. 相似文献
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离心泵被广泛应用于舰艇,是其能源的重要消费者。由于舰艇设备众多,所有设备的效率包括离心泵的效率都是非常重要的。文中介绍了一种提高离心泵效率的方法。当需要调整离心泵的扬程和流量时,泵制造商或者用户对叶轮进行修正是一种常见的做法。修正后的泵和初始泵基本类似,因为只改变了泵的一些参数,其他结构都没变。尽管如此,有效的相似性假设还需要一系列实验验证,文中修正了一个低比转速的离心泵并进行了测试。 相似文献