1.School of Mechanical and Equipment Engineering, Hebei University of Engineering, Handan 056038, China;
2.Hebei Key Laboratory of Intelligent Industrial Equipment Technology, Hebei University of Engineering, Handan 056038, China;
3.College of Intelligent Manufacturing,Shaanxi Institute of Technology,Xi’an 710300, China;
4.National Key Laboratory of Diesel Engine Turbocharging Technology, China North Engine Research Institute,Tianjin 300400, China
The circumferential oil-groove on the floating ring bearing has an important effect on the distribution of the outer oil film pressure, which leads obvious nonlinear vibration for the high-speed and light-loaded turbocharger rotor. Based on the fluid lubrication theory and finite element method, a comprehensive model, including the dynamic equation of the TC rotor, the transient form of thermal energy balance of FRBs, the viscosity-temperature equation of the lubricating oil and the thermal deformation equation of FRBs are established, and the corresponding solving strategy is proposed. The accuracy and reliability of the comprehensive model are verified by the experimental results. Taking the turbocharger rotor system for a diesel engine as an example, the transient vibration response in frequency domain of rotor system with different circumferential oil-groove widths and under different inlet oil temperatures is studied by means of three-dimensional vibration waterfall. It shows that the circumferential oil-groove width is increased for 2.4 to 4.8 mm, the rotational speed range of the inner oil film whip/whirl is reduced, and the inner oil film whirl amplitude decreases greatly under different inlet temperatures. However, with the increase of the width of the circumferential oil-groove and the inlet oil temperature, the bearing capacity of the outer film decreases, which leads to a rigid movement of the rotor system, that is, zero-frequency vibration. The amplitude of zero-frequency vibration is higher than that of low-frequency vibration(subsynchronous), which becomes the dominant frequency. when the circumference groove width increases from 2.4 to 4.8mm and the inlet oil temperature is 50°C, the maximum dimensionless vibration amplitude of the rotor system decreases by about 67%, 75% and 83%, respectively. When the inlet oil temperature is 90°C, the maximum dimensionless vibration amplitude of the rotor system decreases by about 38%, 75% and 82%, respectively. When the inlet oil temperature increases to 130°C, the maximum dimensionless vibration amplitude of the rotor system decreases by about 67%, 75% and 79%, respectively. Therefore, for different inlet oil temperatures, the vibration amplitude of the rotor system can be greatly reduced by the circumferential oil-groove, which is conducive to improving the stability of the rotor system. The conclusion can provide theoretical reference for the parameter design of the circumferential oil-groove for the floating ring bearing.
ZHANG Congcong1, 2, ZHOU Yuzhe3, MEN Rixiu4, FU Xiaorui1, 2, FENG Zemin1, 2, CAI Changwang1, 2.
Research on the influence of circumferential oil-groove width on the nonlinear vibration characteristics for a turbocharger rotor system[J]. Journal of Vibration and Shock, 2024, 43(20): 183-191
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参考文献
[1]Schweizer B, Sievert M. Nonlinear oscillations of automotive turbocharger turbines. Journal of Sound and Vibration. 2009, 321: 955–975.
[2] Schweizer B. Total Instability of turbocharger rotors-physical explanation of the dynamic failure of rotors with full-floating ring bearings. Journal of Sound and Vibration. 2009, 28: 156–90.
[3] Schweizer B. Oil whirl, oil whip and whirl/whip synchronization occurring in rotor systems with full-floating ring bearings[J]. Nonlinear Dynamics, 2009, 57(4): 509–532.
[4] Schweizer B. Dynamics and stability of turbocharger rotors[J]. Archive of Applied Mechanics, 2010, 80(9): 1017–1043.
[5] 宾光富，黄源，钟新利，等. 浮环轴向长度对高速轻载涡轮增压器转子系统振动特性影响研究[J]. 机械工程学报，2019，55(23)：173-181.
BIN Guangfu, HUANG Yuan, ZHONG Xinli, et al. Study on the Influence of Floating Ring Axial Length on Vibration Characteristics of High-speed and Light-load Turbocharger Rotor System[J]. Journal of Mechanical Engineering, 2019, 55(23)：173-181.
[6] 宾光富，黄源，钟新利，等. 长周期变转速下入口油温对高速轻载涡轮增压器转子振动特性影响[J]. 机械工程学报，2020, 56(21)：131-139.
BIN Guangfu, HUANG Yuan, ZHONG Xinli, et al. Effect of Inlet Oil Temperature on Vibration Characteristics of High-speed Light-load Turbocharger Rotor under Long Period and Variable S[peed[J]. 2020, 56(21)：131-139.
[7] LI C H. Dynamics of rotor bearing systems supported by floating ring bearings[J]. Journal of Lubrication Technology，1982，104(4)：469-476.
[8] 张文静，陈渭，李培，等. 系统参数对浮环轴承转速比 的动力影响[J]. 四川大学学报(工程科学版)，2015， 47(3)：160-166.
ZHANG Wenjing，CHEN Wei，LI Pei，et al. Dynamic effects of system parameters on speed ratio of floating ring bearing[J]. Journal of Si Chuan University (Engineering Science Edition)，2015，47(3)：160-166.
[9] CHUN S M. Aeration effects on the performance of a turbocharger journal bearing[J]. Tribology International， 2008，41(4)：296-306.
[10] BIN G F，HUANG Y，GUO S P，et al. Investigation of induced unbalance magnitude on dynamic characteristics of high-speed turbocharger with floating ring bearings[J]. Chinese Journal of Mechanical Engineering，2018，31(1)：88.
[11] 裴世源，徐华，石放辉. 浮环轴承稳态热流体动力润滑 分析[J]. 机械工程学报，2017，53(23)：108-115.
PEI Shiyuan，XU Hua，SHI Fanghui. Study on static thermo-hydrodynamic lubrication of floating ring bearing[J]. Journal of Mechanical Engineering，2017， 53(23)：108-115.
[12] 唐召辉，任兴民，王鸷，等. 浮环轴承系统中浮动环涡动运动研究[J]. 振动与冲击， 2010，29(8)：195-197.
KANG Zhao-hui，REN Xing-min，WANG Zhi，et al. Study on whirl motion of floating-ring in floating-ring bearing system [J]. Journal of Vibration and Shock，2010，29(8)：195-197.
[13] WANG L K，BIN G F，LI X J，et al. Effects of floating ring bearing manufacturing tolerance clearances on the dynamic characteristics for turbocharger[J]. Chinese Journal of Mechanical Engineering，2015，28(3)：530-540.
[14] BOYACI A，LU D，SCHWEIZER B. Stability and bifurcation phenomena of Laval/Jeffcott rotors in semi-floating ring bearings[J]. Nonlinear Dynamics，2015，79(2)：1535- 1561.
[15] 郭红，张直明，张邵琳，等. 径向动压浮环轴承-转子系统多稳定区域研究[J]. 振动与冲击，2016， 35(2)：168-172.
GUO Hong，ZHANG Zhi-ming，ZHANG Shao-lin，et al. Multi stable regions of hydrodynamic floating ring journal bearing-rotor system [J]. Journal of Vibration and Shock，2016， 35(2)：168-172.
[16] Zhang CC, Men RX, Wang YL, He H, Chen W. Experimental and numerical investigation on thermodynamic performance of full-floating-ring bearings with circumferential oil-groove[J]. Proceedings of the Institution of Mechanical Engineers Part J: Journal of Engineering Tribology, 2019, 233(8): 1182~1196.
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