Effects of floating ring bearing manufacturing tolerance clearances on the dynamic characteristics for turbocharger

Wang, Longkai; Bin, Guangfu; Li, Xuejun; Zhang, Xuefeng

doi:10.3901/cjme.2015.0319.034

Cited by 27 publications

(9 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The more effective advantage of supporting action can be obtained at high speeds from dual-film hydrodynamic bearing systems such as full and semi floating-ring bearings. The response studies in high-speed rotor dynamic systems with floating ring journal bearings were thoroughly analyzed by simplified mathematical models [30][31][32][33]. The dynamic model of the flexible rotor dynamic system is formulated using quasi-finite element analysis with lumped floating ring masses considered at the bearing locations.…”

Section: Dynamic Model Of Rotor Bearing Systemmentioning

confidence: 99%

An optimized bearing parameter identification approach from vibration response spectra

Mutra¹,

Srinivas²

2019

J. vibroeng.

View full text Add to dashboard Cite

In the present work, an effective identification methodology bearing dynamic parameters using measured vibration responses at the bearing is proposed. The flexible rotor is analyzed by using finite element beam model with nonlinear hydrodynamic bearing forces due to floating ring bearing supports. The frequency domain responses at different operating speeds are initially obtained in both the lateral directions. The error function is formulated as an average difference in amplitudes of two lateral displacements at a bearing node with known reference signals over a frequency range. The design variables are the speed dependent direct and cross-coupled stiffness and damping parameters of the bearing. With the side constraints on the variables, the error is minimized by using a modified particle swarm optimization scheme. The accuracy of the approach is tested with noisy input signals.

show abstract

Section: Dynamic Model Of Rotor Bearing Systemmentioning

confidence: 99%

An optimized bearing parameter identification approach from vibration response spectra

Mutra¹,

Srinivas²

2019

J. vibroeng.

View full text Add to dashboard Cite

show abstract

“…According to the lubrication theory of sliding bearing, the Reynolds equation of the inner oil film in semi-floating ring bearing is introduced. 47,48 where p i is the inner oil film pressure. h i is the inner film thickness of the semi-floating ring bearing.…”

Section: Introduction Of the Bearing Model With Surface Texturementioning

confidence: 99%

Vibration characteristics of turbocharger rotor system considering internal thread texture parameters of semi-floating ring bearing

Zhong

Jiang

Bin

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

Self Cite

View full text Add to dashboard Cite

The internal thread texture causes changes in the dynamic characteristics of the oil film of the semi-floating ring bearing, which affects the amplitude of vibration and operating life of the turbocharger rotor system. Based on the fluid lubrication theory, the oil film governing equation of a semi-floating ring bearing with surface texture parameters is derived. The effects of the texture depth, position, and number of turns of the internal thread on the dynamic characteristics of the bearing oil film, such as the maximum pressure, load-carrying capacity and stiffness damping, are analyzed. Taking a type of turbocharger as an example, a hydrodynamic model is established to analyze the oil film lubrication in the semi-floating ring bearings, and the dynamic characteristic of the oil film is analyzed by computational fluid dynamics method. The results show that the maximum pressure, bearing capacity, and stiffness damping coefficient of oil film increase firstly and then decrease with the increase of texture depth and the number of thread turns in the range of journal rotation speed from 1000 to 20,0000 r/min. Compared with the non-texture bearings, the dynamic characteristics coefficients of the oil film such as bearing capacity and stiffness damping increase the most, when the depth of texture is 0.006 mm and the number of thread turns is 9. Secondly, the dynamic characteristic coefficient of oil film is improved when the texture is distributed in the middle than on both sides. The thread texture with appropriate parameters can suppress the rotor system vibration amplitude. The conclusion can provide a reference for the design of textual parameters of semi-floating ring bearings.

show abstract

“…Chue and Saipom 22 analyzed the effect of the inlet oil temperature on turbocharger performance of needle roller bearings, and the results indicated that the higher the inlet temperature and the thinner the lubricant are, the higher the efficiency of the turbocharger is. Wang et al 23 studied the influence of the limit tolerance clearance of the floating ring bearing on the vibration of the turbocharger rotor system. Wang et al 24 and Bin et al 25,26 studied the effect of floating ring axial length and unbalance magnitude as well as the position of turbine end and compressor end on subsynchronous vibration suppression of the highspeed turbocharger.…”

Section: Introductionmentioning

confidence: 99%

Effect of the inlet oil temperature on vibration characteristics of the high-speed turbocharger rotor system

Zhong

Huang

Bin

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

Self Cite

View full text Add to dashboard Cite

The inlet oil temperature of the rotor system with high-speed and light-load turbocharger will change during operation, which will change the vibration characteristics of the rotor system and even cause vibration accidents. Taking a certain type of high-speed and light-load turbocharger rotor system as the research object, the changes in oil film viscosity, friction power consumption, oil film temperature rise, and ring speed ratio with the inlet oil temperature of floating ring bearings are analyzed. A dynamic finite-element model of the turbocharger rotor–floating-ring-bearing system is constructed, and the finite-element model is verified through the critical speed and colormap spectrogram. The Newmark integral method is used to analyze the nonlinear transient response of the rotor system, and the influence of the inlet oil temperature on the vibration response characteristics of the rotor system is studied. The results show that an increase in the inlet oil temperature leads to a decrease in the internal and external oil film viscosities, frictional power consumption, temperature rise, and an increase in the ring speed ratio. When the inlet oil temperature increases from 50 °C to 130 °C, the amplitude of the inner oil film oscillation will gradually decrease, but the amplitude of the outer oil film vortex will gradually increase, and the journal speed point where the inner oil film oscillation and the outer oil film vortex will appear about 30% in advance. In summary, the rotor vibration is better when the inlet oil temperature is about 90 °C. The conclusion of this paper can provide a theoretical reference for selecting the operating parameters of the rotor system with the least vibration for high-speed light-load turbochargers.

show abstract

Effects of floating ring bearing manufacturing tolerance clearances on the dynamic characteristics for turbocharger

Cited by 27 publications

References 17 publications

An optimized bearing parameter identification approach from vibration response spectra

An optimized bearing parameter identification approach from vibration response spectra

Vibration characteristics of turbocharger rotor system considering internal thread texture parameters of semi-floating ring bearing

Effect of the inlet oil temperature on vibration characteristics of the high-speed turbocharger rotor system

Contact Info

Product

Resources

About