一种新型液体输送泵的理论与实验研究

发布时间：2019-05-12 00:15

【摘要】：泵作为液体输送装置广泛应用于国民经济的各个领域,当前我国泵设备耗电量占全国用电总量的比例大。面对严峻的国际能源形势,在加速开发新能源的同时,研究利用余热废热驱动的泵系统、设计研发具备出色输送性能的泵产品成为国内外学者和泵制造厂商的关注重点。本文回顾泵的发展历史和当前泵节能技术进展,提出了一种用低品位余热驱动的液体输送泵。研制了该泵的实验样机并设计搭建了测试平台,对该液体输送泵的工作特性开展了理论计算与样机测试,为设计研发该类新型液体输送泵打下了初步基础。主要内容和结论有： 1.理论分析泵工作时,液体在低压侧的充注和液体在高压侧的降落过程。计算得到转速、高压侧压力、低压侧压力、转子通道个数和通道半径的变化对泵流量、轴功率、输送性能系数和泵效率的影响。计算结果表明在优化结构设计的情况下,相同工况下输送同样质量的流体所消耗的电能远远少于常规液体输送泵。 2.以水为工质,高压侧通氮气模拟高压,开展了初步实验研究,探究高压侧压力、转速、通道个数变化对流量、泵功率和泵输送性能系数的影响。实验结果表明：工质在泵内以气液相混合状态输送；在高压侧压力较大时,流量随转速增大而变小；泵功率随高压力增大而增大。 3.比较理论分析和实验结果,两者具有较好的一致性,并分析了高压侧压力变化对实际流量影响的原因。
[Abstract]:As a liquid conveying device, pump is widely used in various fields of national economy. At present, the power consumption of pump equipment accounts for a large proportion of the total electricity consumption in China. In the face of the severe international energy situation, while speeding up the development of new energy, the research and development of pump system driven by waste heat and waste heat, the design and development of pump products with excellent transportation performance has become the focus of attention of scholars and pump manufacturers at home and abroad. In this paper, the development history of pump and the progress of pump energy saving technology are reviewed, and a liquid conveying pump driven by low grade waste heat is proposed. The experimental prototype of the pump is developed and the test platform is designed and built. The theoretical calculation and prototype test of the working characteristics of the liquid conveying pump are carried out, which lays a preliminary foundation for the design and development of this kind of new liquid conveying pump. The main contents and conclusions are as follows: 1. The filling of liquid on the low pressure side and the landing process of the liquid on the high pressure side are analyzed theoretically. The effects of rotating speed, high pressure side pressure, low pressure side pressure, the number of rotor channels and channel radius on pump flow, shaft power, transportation performance coefficient and pump efficiency are calculated. The calculation results show that under the condition of optimizing the structural design, the electric energy consumed by transporting the same mass of fluid under the same working condition is much less than that of the conventional liquid conveying pump. 2. Using water as working fluid, high pressure side nitrogen was used to simulate high pressure, and a preliminary experimental study was carried out to investigate the effects of high pressure side pressure, rotating speed and the number of channels on flow rate, pump power and pump transportation performance coefficient. The experimental results show that the working fluid is transported in the state of gas-liquid mixture in the pump, the flow rate decreases with the increase of rotating speed and the pump power increases with the increase of high pressure when the pressure on the high pressure is high. 3. Comparing the theoretical analysis with the experimental results, the two results are in good agreement, and the reasons for the influence of the change of high pressure side pressure on the actual flow rate are analyzed.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB654

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