Influence of boundary pressure fluctuation on cavitation and performance of liquid film end face mechanical seal

被引：0

作者：

Zhang J. ^{[1
,2
]}

Shen Z. ^{[3
]}

Chen Y. ^{[1
,2
]}

机构：

[1] College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing

[2] Beijing Key Laboratory of Process Fluid Filtration and Separation, China University of Petroleum, Beijing

[3] Hefei General Machinery Research Institute, Anhui, Hefei

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 10期

关键词：

cavitation; mechanical seal; pressure fluctuation; sealing performance;

D O I：

10.16085/j.issn.1000-6613.2021-2481

中图分类号：

学科分类号：

摘要：

Under the working conditions of flow regulation and fluid excitation, the pump will have a wide range of pressure fluctuation, which is easy to lead to the "instability" of the mechanical seal and affect the safe operation of the pump. By establishing the spiral groove three-dimensional liquid film model, using the Mixture multiphase flow model and the Zwart-Gerber-Belamri cavitation model, the evolution law of boundary pressure fluctuation on the end face cavitation and sealing performance of sealing liquid film is explored. The results showed that there was a phase difference between gas volume fraction fluctuation and pressure fluctuation under the condition of boundary pressure fluctuation. Compared with the pressure fluctuation on the outside diameter side, the pressure fluctuation on the inside diameter side had a greater impact on the end face cavitation. The pressure fluctuation on the outer diameter side had little effect on the sealing performance and had good follow-up, while the pressure fluctuation on the inner diameter side was the opposite. In addition, under the condition of inner diameter side pressure fluctuation, there was a critical pressure that mad the gas phase volume fraction 0, and the critical pressure was related to the fluctuation period. The end face cavitation disappeared, resulting in a sharp change in the sealing performance curve. Based on the research on the influence of boundary pressure fluctuation on liquid film seal, the pump mechanical seal should adopt the form of rotary seal (pressure fluctuation acts on the outer diameter side) to reduce the influence of pressure fluctuation in the pump on the mechanical seal. © 2022 Chemical Industry Press. All rights reserved.

引用

页码：5175 / 5187

页数：12

共 35 条

[1]

GU Yongquan, Practical technology of mechanical seal, (2001)

[2]

SUN Dianfeng, SUN Jianjun, YU Qiuping, Et al., Progress of study on dynamics of non-contacting mechanical seals, Chemical Industry and Engineering Progress, 38, 12, pp. 5238-5246, (2019)

[3]

PAN Jie, ANDREW Guzzomi, CAI Jiancheng, PAN Jie, ANDREW Guzzomi, Experimental study of the pressure fluctuation around the volute tongue of a centrifugal pump at variable rotating speed, Fluid Machinery, 43, 2, pp. 13-16, (2015)

[4]

SI Qiaorui, CUI Qianglei, YUAN Jianping, Et al., Tests for flow induced characteristics of a centrifugal pump under air-water two-phase inflow condition, Journal of Vibration and Shock, 38, 9, pp. 15-21, (2019)

[5]

XU Lushuai, HAO Muming, YUAN Xiaoyang, Et al., Dynamic analysis for vibration and impact of liquid film sealing, Journal of Vibration and Shock, 39, 15, pp. 58-65, (2020)

[6]

CHI Zhonghuang, Influence of fluid exciting force in a low specific speed centrifugal pump on the dynamic characteristics of the rotor, (2019)

[7]

WANG Songlin, TAN Lei, WANG Yuchuan, Characteristics of transient cavitation flow and pressure fluctuation for a centrifugal pump, Journal of Vibration and Shock, 32, 22, pp. 168-173, (2013)

[8]

CHEN Ke, ZHANG Fan, HONG Feng, Et al., Pressure fluctuation in a side channel pump under gas-liquid two-phase flow, Journal of Vibration and Shock, 40, 6, pp. 1-10, (2021)

[9]

LIU Houlin, REN Yun, TAN Minggao, Et al., CFD calculation and test of pressure fluctuation in double-channel pump, Journal of Drainage and Irrigation Machinery Engineering, 28, 4, pp. 277-281, (2010)

[10]

LI Zhentao, WANG Yunlei, HAO Muming, Et al., Cavitation experiment and performance analysis of downstream pumping spiral groove seals, Tribology, 37, 6, pp. 743-755, (2017)

← 1 2 3 4 →