Dynamic Characteristic Analysis of the Multi-Stage Centrifugal Pump Rotor System with Uncertain Sliding Bearing Structural Parameters

被引:8
|
作者
Lin, Lijun [1 ,2 ]
He, Mingge [3 ]
Ma, Wensheng [4 ]
Wang, Qingyuan [1 ,2 ]
Zhai, Haiyan [5 ]
Deng, Congying [4 ,5 ]
机构
[1] Chengdu Univ, Sch Mech Engn, Chengdu 610106, Peoples R China
[2] Sichuan Univ, Coll Architecture & Environm, Chengdu 610065, Peoples R China
[3] CNPC Chuanqing Drilling Engn Co Ltd, Chengdu 610051, Peoples R China
[4] Chongqing Pump Ind Co Ltd, Natl Enterprise Technol Ctr, Chongqing 400033, Peoples R China
[5] Chongqing Univ Posts & Telecommun, Sch Adv Mfg Engn, Chongqing 400065, Peoples R China
关键词
rotor dynamics; sliding bearing; multi-stage centrifugal pump; uncertain structural parameters; PERFORMANCE; SURFACE; DESIGN; ERRORS; MODEL;
D O I
10.3390/machines10060473
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The traditional dynamic characteristic analysis of the multi-stage centrifugal pump rotor system is developed assuming the bearing structural parameters with constant values. However, the manufacturing errors will cause the structural parameters to vary around their nominal values and then affect the dynamic characteristics of the bearing-rotor system. Thus, this paper proposes a method for analyzing the dynamic characteristics of the bearing-rotor system with uncertain bearing structural parameters. First, dynamic characteristic coefficients of the sliding bearing are identified to establish the dynamic model of the rotor system, and its dynamic characteristics are analyzed through finite element simulations. Next, the sliding bearing structural parameters are taken as the variables to establish an optimization model, which is solved by the improved particle swarming optimization algorithm to obtain the extreme critical speed of the rotor system. A case study was carried out on a multi-stage centrifugal pump. The obtained extreme values of the critical speeds were close to those calculated using the multiple samples generated by the Monte Carlo method, indicating that the proposed method can provide accurate variation ranges of critical speeds efficiently and lay a theoretical basis for selecting robust operational speeds and designing the rotor system of the multi-stage centrifugal pump.
引用
收藏
页数:17
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