Study on torsional vibration characteristics of compressor flexible rotors considering contact clearance

The torsional vibration of reciprocating compressor crankshaft system can cause major problems such as burnt bearings and shaft fracture.In order to understand the torsional vibration response of the compressor rotor system, a torsional vibration mechanics solution method for the flexible rotor syst...

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Main Authors: HUANG Zhiqiang, WANG Jie, LI Tao, LI Gang, WANG Shuo, MU Dequan
Format: Article
Language:zho
Published: Editorial Office of Journal of Mechanical Strength 2025-01-01
Series:Jixie qiangdu
Subjects:
Online Access:http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2025.01.003
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author HUANG Zhiqiang
WANG Jie
LI Tao
LI Gang
WANG Shuo
MU Dequan
author_facet HUANG Zhiqiang
WANG Jie
LI Tao
LI Gang
WANG Shuo
MU Dequan
author_sort HUANG Zhiqiang
collection DOAJ
description The torsional vibration of reciprocating compressor crankshaft system can cause major problems such as burnt bearings and shaft fracture.In order to understand the torsional vibration response of the compressor rotor system, a torsional vibration mechanics solution method for the flexible rotor system of the compressor considering the bushing-pin collision clearance and the oil film clearance of the crankshaft-bearing was proposed, which provided a new idea and method to avoid the natural frequency of the crankshaft system.Based on the multi-body dynamics and Hertz contact theory,the torsional dynamic response of the crankshaft system with collision clearance was solved.The results show that the torsional vibration amplitude of the 4th column crank pin is the largest, the torsional angular displacement amplitude is 0.051°, and the dynamic angular velocity peak value is 156.026 rad/s.Based on this, the crankshaft-bearing oil film clearance was considered, the oil film pressure of sliding bearings was calculated by the finite difference method and the over-relaxation iterative method, and the dynamic characteristic coefficients of bearings were solved according to pressure perturbation method.The effects of the bushing-pin collision clearance and the crankshaft-bearing oil film clearance on the dynamic response of the crankshaft system were comprehensively considered in the modal analysis of the crankshaft system under preload.The resonance of the crankshaft with and without oil film clearances was compared. The results show that the natural frequencies of the 3rd and 8th orders of the crankshaft system decreases by 44.64% and 21.23%, and when considering the reduction of the resonant speed point of the crankshaft with comprehensive clearance in the same speed range, the 2nd order critical speed is reduced by 38.55%, and the probability of resonance increases.
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institution Kabale University
issn 1001-9669
language zho
publishDate 2025-01-01
publisher Editorial Office of Journal of Mechanical Strength
record_format Article
series Jixie qiangdu
spelling doaj-art-b26ecae245954b79a21603483923352b2025-01-25T19:01:12ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692025-01-0147203081419699Study on torsional vibration characteristics of compressor flexible rotors considering contact clearanceHUANG ZhiqiangWANG JieLI TaoLI GangWANG ShuoMU DequanThe torsional vibration of reciprocating compressor crankshaft system can cause major problems such as burnt bearings and shaft fracture.In order to understand the torsional vibration response of the compressor rotor system, a torsional vibration mechanics solution method for the flexible rotor system of the compressor considering the bushing-pin collision clearance and the oil film clearance of the crankshaft-bearing was proposed, which provided a new idea and method to avoid the natural frequency of the crankshaft system.Based on the multi-body dynamics and Hertz contact theory,the torsional dynamic response of the crankshaft system with collision clearance was solved.The results show that the torsional vibration amplitude of the 4th column crank pin is the largest, the torsional angular displacement amplitude is 0.051°, and the dynamic angular velocity peak value is 156.026 rad/s.Based on this, the crankshaft-bearing oil film clearance was considered, the oil film pressure of sliding bearings was calculated by the finite difference method and the over-relaxation iterative method, and the dynamic characteristic coefficients of bearings were solved according to pressure perturbation method.The effects of the bushing-pin collision clearance and the crankshaft-bearing oil film clearance on the dynamic response of the crankshaft system were comprehensively considered in the modal analysis of the crankshaft system under preload.The resonance of the crankshaft with and without oil film clearances was compared. The results show that the natural frequencies of the 3rd and 8th orders of the crankshaft system decreases by 44.64% and 21.23%, and when considering the reduction of the resonant speed point of the crankshaft with comprehensive clearance in the same speed range, the 2nd order critical speed is reduced by 38.55%, and the probability of resonance increases.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2025.01.003Reciprocating compressorCollision clearanceOil film clearanceRigid-flexible couplingCrankshaft torsional vibrationResonance
spellingShingle HUANG Zhiqiang
WANG Jie
LI Tao
LI Gang
WANG Shuo
MU Dequan
Study on torsional vibration characteristics of compressor flexible rotors considering contact clearance
Jixie qiangdu
Reciprocating compressor
Collision clearance
Oil film clearance
Rigid-flexible coupling
Crankshaft torsional vibration
Resonance
title Study on torsional vibration characteristics of compressor flexible rotors considering contact clearance
title_full Study on torsional vibration characteristics of compressor flexible rotors considering contact clearance
title_fullStr Study on torsional vibration characteristics of compressor flexible rotors considering contact clearance
title_full_unstemmed Study on torsional vibration characteristics of compressor flexible rotors considering contact clearance
title_short Study on torsional vibration characteristics of compressor flexible rotors considering contact clearance
title_sort study on torsional vibration characteristics of compressor flexible rotors considering contact clearance
topic Reciprocating compressor
Collision clearance
Oil film clearance
Rigid-flexible coupling
Crankshaft torsional vibration
Resonance
url http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2025.01.003
work_keys_str_mv AT huangzhiqiang studyontorsionalvibrationcharacteristicsofcompressorflexiblerotorsconsideringcontactclearance
AT wangjie studyontorsionalvibrationcharacteristicsofcompressorflexiblerotorsconsideringcontactclearance
AT litao studyontorsionalvibrationcharacteristicsofcompressorflexiblerotorsconsideringcontactclearance
AT ligang studyontorsionalvibrationcharacteristicsofcompressorflexiblerotorsconsideringcontactclearance
AT wangshuo studyontorsionalvibrationcharacteristicsofcompressorflexiblerotorsconsideringcontactclearance
AT mudequan studyontorsionalvibrationcharacteristicsofcompressorflexiblerotorsconsideringcontactclearance