共查询到20条相似文献,搜索用时 78 毫秒
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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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主要介绍内蒙古大中矿业选矿厂两个循环水泵车间的5台水泵的技改方法和节能措施,希望对同行有所指导。 相似文献
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对在五坐标数控加工中心上铣制三元流叶轮时出现的叶轮附面尺寸误差问题,进行了详细分析,并提出了问题的解决方法,有效地避免了加工中产生的超差。 相似文献
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根据三元流叶轮叶片空间构型特征,通常应该使用五轴联动加工中心进行叶轮铣制工作,本文讨论四轴联动数控机床代替五轴联动加工中心,铣制三元流风机叶轮。 相似文献
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简要介绍供水企业采用变频器的原因及变频器的主要特点,同时较详细地介绍变频器的工作原理及其创造经济效益的可观性,并指出变频器在工矿企业中同样具有很好的发展前景。 相似文献
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介绍了智能型柴油机消防泵组与电动消防泵组在消防给水系统中的联动作用,阐述了柴油机消防泵组的基本工作原理。在分析其自动控制的基础上给出了自动控制的硬件线路设计和PLC程序设计。 相似文献
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Wenjie Wang Ji Pei Shouqi Yuan Jinfeng Zhang Jianping Yuan Changzheng Xu 《Journal of Mechanical Science and Technology》2016,30(2):567-574
An optimization process for impellers was carried out based on numerical simulation, Latin hypercube sampling (LHS), surrogate model and Genetic algorithm (GA) to improve the efficiency of residual heat removal pump. The commercial software ANSYS CFX 14.5 was utilized to solve the Reynolds-averaged Navier-Stokes equations by using the Shear stress transport turbulence model. The impeller blade parameters, which contain the blade inlet incidence angle Δβ, blade wrap angle φ, and blade outlet angle β 2, were designed by random sample points according to the LHS method. The efficiency predicted under the design flow rate was selected as the objective function. The best combination of parameters was obtained by calculating the surrogate model with the GA. Meanwhile, the prediction accuracies of three surrogate models, namely, Response surface model (RSM), Kriging model, and Radial basis neural network (RBNN), were compared. Results showed that the calculated findings agree with the experimental performance results of the original pump. The RSF model predicted the highest efficiency, while the RBNN had the highest prediction accuracy. Compared with the simulated efficiency of the original pump, the optimization increased efficiency by 8.34% under the design point. Finally, the internal flow fields were analyzed to understand the mechanism of efficiency improvement. The optimization process, including the comparison of the surrogate models, can provide reference for the optimization design of other pumps. 相似文献
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通过对LGN型离心式高黏度泵的设计及工业应用,介绍了该泵在水力设计、结构设计以及机械密封方面的特点,并对泵进行性能试验和工业应用考核。结果表明,该泵设计合理,运行平稳、可靠。 相似文献
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DCS系统在闪电后离心泵恢复起动方面的应用 总被引:1,自引:0,他引:1
通过分析离心泵在停运后再起动的可行性,提出了利用DCS系统解块闪电造成的机泵停运的方案,以降低闪电对连续生产装置的影响。 相似文献
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