泵体形状对单作用真空泵性能的影响分析

doi:10.16085/j.issn.1000-6613.2019-0970

化工进展 ›› 2020, Vol. 39 ›› Issue (3): 864-871.DOI: 10.16085/j.issn.1000-6613.2019-0970

泵体形状对单作用真空泵性能的影响分析

李鹏^1,²(),李晓光³,杨锋苓¹(),刘兆强²,齐瑞强²,满凯²

^1.山东大学机械工程学院，山东济南 250061
^2.山东中烟滕州卷烟厂，山东滕州277599
^3.山东天力能源股份有限公司，山东济南 250100

收稿日期:2019-06-17 出版日期:2020-03-05 发布日期:2020-04-03
通讯作者: 杨锋苓
作者简介:李鹏（1991—），男，硕士研究生，研究方向为流体机械。E-mail:1591253032@qq.com。
基金资助:
山东省重点研发计划(2017GGX70101)

Effect of shape on performance of single-acting vacuum pump

Peng LI^1,²(),Xiaoguang LI³,Fengling YANG¹(),Zhaoqiang LIU²,Ruiqiang QI²,Kai MAN²

^1.School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong, China
^2.Tengzhou Cigarette Factory of China Tobacco Shandong Industrial Co. , Ltd. , Tengzhou 277599, Shandong, China
^3.Shandong Tianli Energy Co. , Ltd. , Jinan 250100, Shandong, China

Received:2019-06-17 Online:2020-03-05 Published:2020-04-03
Contact: Fengling YANG

摘要/Abstract

摘要：

为了预测泵体形状对单作用双吸式真空泵性能的影响，采用理论推导的方法，对椭圆形泵体和分别以椭圆形的长、短轴为直径的圆形泵体进行了对比研究，并基于计算流体力学方法分析了椭圆形泵体内部液体的速度场、压力场和温度场分布情况。结果表明，与采用椭圆形的长轴长度和短轴长度制造的两个圆形泵体相比，椭圆形泵体在散热性能、吸气性能和排气性能方面都优于圆形泵体。在极限压缩比工况下，椭圆形泵体叶轮外部液体的速度分布较为均匀，泵体内部压力场由叶轮中心向边缘逐渐增大。此外，叶轮边缘的压力分布也是不均匀的，冷却介质的温度从入口到出口过程中逐渐升高，并在出口处易形成旋涡，降低冷却效率。

关键词: 真空泵, 形状参数, 流场, 计算流体力学, 数值模拟, 传热

Abstract:

In order to predict the effect of pump shape on the performance of the single-acting double-suction vacuum pump, a comparative study of the elliptical pump and two circular pumps, with the diameters of long and short elliptic axes respectively, was carried out by means of theoretical derivation. Distributions of the velocity, pressure and temperature field of the liquid inside the elliptical pump were analyzed based on computational fluid dynamics. Results showed that the elliptical pump is superior to the circular pump in terms of heat dissipation performance, as well as the suction and exhaust performance. Although the structure of the pump body is symmetrical, the distribution of the pressure, velocity and temperature field in the pump body and the edge of the impeller is uneven. Under the working condition of limit compression ratio, the velocity distribution of the liquid beyond the impeller of the elliptical pump is more uniform. The pressure field within the pump increases gradually from the center to the edge of the impeller. In addition, the pressure distribution at the edge of the impeller is also uneven. The temperature of the cooling liquid increases gradually from the inlet to the outlet of the pump. At the outlet a whirlpool is easy to form, which accordingly decreases the cooling effect.

Key words: vacuum pump, shape parameters, flow field, CFD, numerical simulation, heat transfer

中图分类号:

TB 752

李鹏,李晓光,杨锋苓,刘兆强,齐瑞强,满凯. 泵体形状对单作用真空泵性能的影响分析[J]. 化工进展, 2020, 39(3): 864-871.

Peng LI,Xiaoguang LI,Fengling YANG,Zhaoqiang LIU,Ruiqiang QI,Kai MAN. Effect of shape on performance of single-acting vacuum pump[J]. Chemical Industry and Engineering Progress, 2020, 39(3): 864-871.

图/表 11

图1 单作用真空泵体的相关参数

图2 椭圆形和圆形泵体径向距离之差

图3 椭圆形和圆形泵体内界线对比

图4 不同内界线的相对位置1—长轴直径的理论内界线；2—椭圆形理论内界线；3—短轴直径的理论内界线

图5 真空泵网格划分图

图6 叶轮径向方向流体速度的分布

图7 泵体内部速度分布情况

图8 真空泵叶片的受力分布

表1 叶片表面受力分布

叶片类型

总压最小值

/Pa

图9 真空泵内部的总压云图

图10 真空泵出气口所在平面流体的温度和速度分布图

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泵体形状对单作用真空泵性能的影响分析

Effect of shape on performance of single-acting vacuum pump

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