单级单吸离心泵设计及降噪技术研究

发布时间：2018-06-26 11:56

本文选题：离心泵 + 噪声　；参考：《大连理工大学》2014年硕士论文

【摘要】：随着工业水平的不断提高,动力机械的种类日益增多,产生的振动和噪声污染也日趋严重。噪声能干扰工作或业余活动中的语言通讯,在某些方面,噪声能影响人的行为,它甚至能导致暂时性听力损失,如果噪声级足够强,还能使听觉产生永久性损伤；其二,过大的振动影响机器正常运转,降低设备性能指标,甚至因强度问题引起破坏。因此振动与噪声控制具有重要的理论和实践意义。本文通过对单级单吸离心泵进行水力设计、强度计算、降噪设计,并对其理论设计结果进行试验验证,主要研究内容和结论如下。 (1)在水力模型的设计中,采用传统设计方法相似换算法初步确定水力尺寸,然后通过对水力部件进行CFD流场分析,使得整个水力流道内流动平稳,未出现明显的旋涡,压力等流动参数变化平缓,水力结构设计合理,既满足水力性能要求,又有效减小水力噪声,达到了预期的目标,并满足设计的高性能要求：流量100m3/h,扬程60m,效率75%； (2)在结构设计中,通过常规经验公式及应力分析软件进行强度校核,其设计方向正确,方案合理可行。总体结构紧凑,动静间隙、转动件定位方式选择合理,在承压件壁厚选择上,留有一定的余量,使得泵组具有较高的安全可靠性； (3)在降噪设计中,结合水力、结构设计,并通过对离心泵噪声源及传递途径的分析,分别在泵组水力、结构、电磁三方面采取针对性措施,来减小泵组的噪声。 (4)将以上设计分析得出的结论,应用到实际产品中进行试验验证,试验结果表明：水力性能满足要求,噪声结果与预期的指标相符。研究结果为离心泵的设计、制造和实验测试提供了借鉴,为该类离心泵的噪声控制提供了方法。
[Abstract]:With the continuous improvement of industrial level, the types of power machinery are increasing day by day, and the pollution caused by vibration and noise is becoming more and more serious. Noise can interfere with verbal communication at work or in amateur activities. In some ways, noise can affect human behavior. It can even lead to temporary hearing loss, and if the noise level is strong enough, it can cause permanent hearing impairment. Excessive vibration affects the normal operation of the machine, reduces the performance index of the equipment, and even causes damage due to the strength problem. Therefore, vibration and noise control has important theoretical and practical significance. In this paper, the hydraulic design, strength calculation, noise reduction design of single-stage single-suction centrifugal pump are carried out, and its theoretical design results are tested and verified. The main research contents and conclusions are as follows: (1) in the design of hydraulic model, The hydraulic dimension is preliminarily determined by the traditional design method similar conversion method, and then the CFD flow field analysis of the hydraulic components is carried out, which makes the flow in the whole hydraulic channel stable, without obvious vortex, and the change of flow parameters such as pressure is gentle. The design of hydraulic structure is reasonable, which not only meets the requirements of hydraulic performance, but also effectively reduces the hydraulic noise, achieves the expected goal, and meets the high performance requirements of the design: flow rate of 100m3 / h, lift of 60m, efficiency of 75.The (2) in the structural design, The design direction is correct and the scheme is reasonable and feasible by using the conventional empirical formula and stress analysis software. The overall structure is compact, the static and static clearance, the rotation part location mode selection is reasonable, in the pressure part wall thickness choice, has the certain allowance, causes the pump group to have the higher safety reliability; (3) in the noise reduction design, unifies the hydraulic power, Structure design, and through the analysis of the noise source and transmission way of centrifugal pump, the paper takes specific measures in hydraulic, structural and electromagnetic aspects of pump group, respectively, to reduce the noise of pump group. (4) the conclusion of the above design analysis is given. The test results show that the hydraulic performance meets the requirements and the noise results are in line with the expected targets. The results provide a reference for the design, manufacture and experimental test of centrifugal pump, and provide a method for noise control of this kind of centrifugal pump.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH311

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