轴向柱塞泵配流副油膜的实验研究

本文介绍了对６３ＣＹ１４－ＩＢ型轴向柱塞泵配流副油膜的实验研究结果。该研究结果为改进该泵配流副的性能提供了依据。     

森兰变频器在循环水供水系统中的应用

介绍森兰变频器在循环水供水系统中的应用,实现了能耗的节约以及故障的自动切换。     

乳化液泵站变频调速系统的设计

针对传统的乳化液泵站调速系统存在机械损耗比较大的问题,提出了一种乳化液泵站变频调速系统的设计方案;给出了该系统的硬件结构,详细介绍了该系统的工作模式及软件设计。实际应用表明,该系统运行稳定、机械损耗小。     

Soft computing approach to fault diagnosis of centrifugal pump

Fault detection and isolation in rotating machinery is very important from an industrial viewpoint as it can help in maintenance activities and significantly reduce the down-time of the machine, resulting in major cost savings. Traditional methods have been found to be not very accurate. Soft computing based methods are now being increasingly employed for the purpose. The proposed method is based on a genetic programming technique which is known as gene expression programming (GEP). GEP is somewhat a new member of the genetic programming family. The main objective of this paper is to compare the classification accuracy of the proposed evolutionary computing based method with other pattern classification approaches such as support vector machine (SVM), Wavelet-GEP, and proximal support vector machine (PSVM). For this purpose, six states viz., normal, bearing fault, impeller fault, seal fault, impeller and bearing fault together, cavitation are simulated on centrifugal pump. Decision tree algorithm is used to select the features. The results obtained using GEP is compared with the performance of Wavelet-GEP, support vector machine (SVM) and proximal support vector machine (PSVM) based classifiers. It is observed that both GEP and SVM equally outperform the other two classifiers (PSVM and Wavelet-GEP) considered in the present study.     

城轨地铁用车轴强度计算分析

为了保证某城轨地铁车辆的行车安全,对其车轴强度进行了分析。参照标准EN13103中的材料力学计算方法,选取该车轴的7个截面,计算出各截面的合力矩、应力以及安全系数。结果表明,车轴危险截面位于轮座与刹车盘座圆弧过渡处和刹车盘座与轴身圆弧过渡处,且最大计算应力小于许用应力,满足车轴强度设计要求。     

不可逆量子斯特林热泵循环性能分析与优化

建立了以一维无限深势阱中极端相对论粒子为工质的不可逆量子斯特林热泵循环模型。考虑高低温热源之间的热漏,导出了循环的性能系数与无量纲泵热率的表达式。分析了循环性能与各性能参数之间的关系。研究发现,热泵的性能系数与无量纲泵热率都随粒子在状态1进处于激收态上的占有几度单调递减,性能系数与无量纲泵热率都是势阱宽度比的凸单调函数。无量纲泵热率关于性能系数的关系曲线为回原点的扭叶型,并确定了该不可逆量子斯特林热泵的最优运行区间。     

不锈钢水泵底架成形工艺及模具设计

分析了水泵底架原冲压成形工艺存在的问题,提出了新的成形工艺方案,介绍了新工艺中关键工序的模具结构以及模具加工、现场调试应注意的事项。经生产验证,改进后的工艺与模具结构合理,产品质量及生产效率大大提高。     

新型滑靴式径向柱塞泵的降噪防漏措施

本文介绍一种新型滑靴式径向柱塞泵的结构，分析其降噪防漏的措施。     

提高杂质泵过流部件品质的工艺技术

从杂质泵过流部件的需求现状和失效分析、材质和化学成分选用时的量化指数 ,介绍了护套、后护板、前护板 ,叶轮等铸造工艺 ,热处理工艺要点 ,提出了提高杂质泵过流部件品质的闭环系统。     

浅谈气力提升系统的设计

阐述了气力提升系统的组成、原理、选择原则和设计过程。并对气力提升系统与传统提升装置进行了分析、比较,指出气力提升系统具有设备性能稳定、耗能小等优点,有着很好的应用前景,值得推广。