Experimental Analysis of Dynamic Oil Film Pressure of Tilting-Pad Journal Bearings

Shen, Jiexi; Xiong, Xingchuang; Li, Guoping; Wang, Xiaojing; Hua, Zikai; Nie, Zhou

doi:10.1007/s11249-016-0723-6

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…Although shaft center eccentricity cannot be calculated here for bearing-neutral positions that were not accurately defined, relative shaft orbits of the textured bearings are available, which indirectly demonstrates that reasonable texture could change oil film pressure and result in more dense shaft orbits (see Figure 6). In fact, the nonlinear rotor-bearing system vibration is closely related to the oil film pressure [25], which can simultaneously reflect perturbed force. Dimple textures can store some oil film and indeed reduce oil film pressure perturbation, which can keep the operation of rotor-bearing system more stable.…”

Section: Discussion Introduction Of Microdimples Can Changementioning

confidence: 99%

“…In this respect, surface texture could be a promising design as vibration absorption in journal bearings. By means of the same test rigs [25,26], future work will be conducted, respectively, to investigate the dynamic characteristics of sliding bearings and thrust bearings with various textures; in addition, oil film pressure and temperature will be tested in that large sized bearings.…”

Section: Discussion Introduction Of Microdimples Can Changementioning

confidence: 99%

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An Experimental Research on the Vibration of Surface-Textured Journal Bearings

Jian

Wang

Zeng

et al. 2017

Shock and Vibration

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Growing attention has been paid to surface texture owing to its significance in bearing lubrication, load capacity, and wear resistance. In this paper, research emphasis is placed on the influence of texture distributions on bearing vibration and rotor stability. With microfabrication techniques, three kinds of textures configurations (0–90° partial distribution, 0–160° partial distribution, and 0–160° full distribution) are designed and applied on the lower pad surface. The experiment of journal bearings is carried out. The experiment results show that there is a significant decrease in acceleration amplitude of the textured bearings compared to nontextured bearings. Furthermore, the 0–160° partially distributed journal bearings have better vibration damping effect than another two kinds of textures, which can be verified by the shaft center orbits, Fourier spectrums, and waterfall plots.

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Section: Discussion Introduction Of Microdimples Can Changementioning

confidence: 99%

Section: Discussion Introduction Of Microdimples Can Changementioning

confidence: 99%

An Experimental Research on the Vibration of Surface-Textured Journal Bearings

Jian

Wang

Zeng

et al. 2017

Shock and Vibration

Self Cite

View full text Add to dashboard Cite

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“…The lubrication characteristics for the journal bearings such as high load capability and low-temperature rise have been researched by theoretical analysis (Ebrahimi et al, 2019;Wang et al, 2010) and experimental analysis (Salazar and Santos, 2018;Shen et al, 2016), which have been given much more attention.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental dynamics analysis of rotor-bearing system supported by elliptical bearings

Zhao

Zhang

Feng³

et al. 2020

ILT

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Purpose High power and speed are new demands for rotating machinery which needs the journal bearings with high dynamic characteristics. The critical speed of the rotor-bearing system is one of the most significant parameters to evaluate the dynamic characteristics. This paper aims to investigate the theoretical and experimental analysis of a rotor system supported by large diameter elliptical bearings. Design/methodology/approach To obtain the theoretical and experimental support for rotor-bearing system design, dynamic characteristics theoretical analysis based on the finite difference method is given and an experiment focuses on critical speed identification is carried out. Findings The theoretical calculation results indicate that the critical speed is near to 800 rpm and there is no large vibration amplitude round working speed (1,500 rpm). Using the test bench in the factory unit, vibration data including three experimental processes are obtained. According to the vibration data, the critical speed is identified which also indicates that it is stable when working at 1,500 rpm. Originality/value The design method for the rotor system supported by large diameter elliptical bearing can be obtained by the theoretical and experimental results shown in this paper. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-04-2020-0122/

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“…However, most of the study results cannot be used in industry directly because of the inaccuracy of boundary conditions. Experimental studies were also carried out on oil film pressure measurement (Shen et al , 2016), oil film thickness (Zhang et al , 2015), temperature measurement (Zhao et al , 2017), vibration (Grabowski, 1984) and new device for bearings experiment (Ouyang et al , 2017). However, most of these studies focus on the bearings with diameters no more than 800 mm.…”

Section: Introductionmentioning

confidence: 99%

Vibration and critical characteristics of the tilting pads journal bearing-rotor system

Zhao

Feng²,

Guan

et al. 2019

ILT

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Purpose High power rotating machinery requires large diameter bearings that can perform under extreme conditions. Vibrations and critical speeds of rotor supported by tilting pad journal bearing (TPJBs) exceeding their design limits may cause unit failure. This paper aims to investigate the experimental technique for large diameter bearings. Design/methodology/approach To obtain the experimental support for rotor-bearing system design, an experiment focusing on vibration monitoring is given. The sensors arrangement, monitoring system and critical speed identification method are provided. Findings By using test bench in factory unit, a large amount of vibrations data of different working situations is obtained. In addition, a method named non-excitation identification for critical speed is proposed. The critical speed of rotor identified through vibration data is given. The theoretical calculation results are also presented. Originality/value The basis for rotor-bearing system design can be obtained through comparisons between the experimental results and the theoretical calculation data.

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Experimental Analysis of Dynamic Oil Film Pressure of Tilting-Pad Journal Bearings

Cited by 6 publications

References 14 publications

An Experimental Research on the Vibration of Surface-Textured Journal Bearings

An Experimental Research on the Vibration of Surface-Textured Journal Bearings

Theoretical and experimental dynamics analysis of rotor-bearing system supported by elliptical bearings

Vibration and critical characteristics of the tilting pads journal bearing-rotor system

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