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

Zhong, Xinli; Huang, Yuan Mao; Bin, Guangfu; Chen, Anhua

doi:10.1177/1350650120987033

Cited by 12 publications

(1 citation statement)

References 30 publications

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“…Andrés et al 25,26 made further predictions of the linear as well as nonlinear behavior in the turbocharger rotor system and compared the predicted results with experimental data. Zhong et al, 27 Wang et al, 28 and Bin et al 29,30 studied the effect of unbalanced and inlet oil temperature on the vibration of the turbocharger rotor. It has been found that the rotor vibration condition was best when the inlet oil temperature of the floating ring bearing was 90 °C.…”

Section: Introductionmentioning

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:

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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.

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