Effect of groove shape on the hydrodynamic lubrication of journal bearing considering cavitation

Chen, Yu; Feng, Jun; Sun, Yu; Xu, Peng; Dai, Qiao; Yu, Chen

doi:10.1108/ec-06-2019-0287

Cited by 10 publications

(6 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yu et al [4] pointed that the cavitation area reduced but the dynamic pressure area enlarged with the decrease of cavitation pressure. Considering the cavitation phenomena and thermal effect, Chen et al [5] gained the hydrodynamic simulations of journal bearing for different groove shapes under different operation conditions. Dhande et al [6] used mixture model to study cavitation and observed that maximum pressure of journal bearing drop when cavitation is considered.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ellipticity on Cavitation Mechanism and Thermal Effect of Elliptical Journal Bearings

et al. 2021

View full text Add to dashboard Cite

Taking the elliptical bearing as the research object, adopting the mixture two-phase flow model and energy equation, the pressure characteristics, the cavitation distribution and the thermal effect of elliptical bearing with different ellipticities are analyzed. The results show that the maximum temperature rise of elliptical bearing is lower than cylindrical bearing. The optimal ellipticity of elliptical bearing is 0.6, the upper and lower bush of elliptical bearing can form the effective oil film, the proportion of cavitation area and volume is small, the maximum temperature rise of oil film is lowest, which is conducive to the stable operation of journal bearings.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Ellipticity on Cavitation Mechanism and Thermal Effect of Elliptical Journal Bearings

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In the research conducted by Li for obtaining accurate result (Li et al, 2020), the CFD method combined with simplified engineering algorithms was used to predict the performance of aerostatic bearings. Considering cavitation, Yu et al (2019) used CFD to study the performance of hydrostatic bearings under different groove shapes. Using FLUENT to simulate the characteristics of the support bearing on the energy recovery device, Xu et al (2016) found that the support force varied linearly with the supply pressure and film thickness and obtained the optimal film thickness.…”

Section: Introductionmentioning

confidence: 99%

Analysis of static and dynamic characteristics of aerostatic bearing with reflux orifices

Chen

Zhang

et al. 2021

ILT

View full text Add to dashboard Cite

Purpose The purpose of this paper is to provide a solution for Reynolds equation with both throttling term and reverse throttling term and provides a reference for changing damping of hydrostatic bearing. Design/methodology/approach The reverse throttling term is introduced into the Reynolds equation, and the adaptive damping factor is used in the Newton iteration method to improve convergence of numerical calculations. The static and dynamic performances of this bearing are numerically investigated by the finite-element method. Findings The results indicate that the reflux orifices lead to a decrease in load capacity at a high eccentricity ratio. Additionally, the mass inflow rate is increased; however, the additional inflow increase can be controlled by enhanced backpressure of the reflux orifice. Nevertheless, the bearing with the reflux orifice shows superiority in resisting high-frequency disturbances and enhances direct damping by 20% under a high backpressure. Originality/value This work presents an adaptive Newton damping iterative method for solving Reynolds equation with both throttling term and reverse throttling term. This work also provides a new idea for bearing structure design in improving damping.

show abstract

“…In contrast, Mo et al [ 10 ] also adopted the THD method based on dynamic mesh technology, and urged that it can be applied to simulate the variation of inner temperature HJB, whereas, they also mentioned further experimental verification is still of necessity. For the methods of considering cavitation function, Chen et al [ 11 , 12 ] presented the influence of shape of groove on the lubrication with the cavitation and thermal effect taken into consideration, and provided suggestions for groove shape selection under extreme operation condition, whereas, the viscosity dissipation function was not taken into consideration. Song et al [ 13 ] and Xiang et al [ 14 ] introduced the three-dimensional (3D) models with considering conjugate heat transfer and transient interactions for HJB, separately.…”

Section: Introductionmentioning

confidence: 99%

Prediction on Flow and Thermal Characteristics of Ultrathin Lubricant Film of Hydrodynamic Journal Bearing

Jiang

Liang²,

Huang³

et al. 2021

Micromachines

View full text Add to dashboard Cite

This paper focuses on the flow and thermal characteristics of the lubricant film in the micro clearance of a hydrodynamic journal bearing (HJB) at high rotating speed. A thermohydrodynamic (THD) method consists of the Reynolds equation coupled with energy and viscosity-temperature equation with considering the cavitation is put forward. The 3D surface diagrams of the lubricant film thickness, pressure, temperature, liquid mass fraction, flow rate and heat dissipation distributions under different geometric, operating, slip and no-slip boundary conditions are systemically exhibited and analyzed. The results show that with the rise of eccentricity or length diameter ratio, the maximum peaks of pressure, temperature and heat dissipation are rapidly increased, the cavitation is aggravated, and the flow rate is accelerated in different extent. As the bearing speed accelerating, the maximum peak of temperature is strongly increased, whereas, the distinction between peaks of flow rate and heat dissipation is magnified and reduced, respectively. It provides a fruitful inside view of the inner flow and thermal characterizations of HJB for further understanding its flow-thermal interaction mechanisms and offers theoretical support for improving its working performance.

show abstract

Effect of groove shape on the hydrodynamic lubrication of journal bearing considering cavitation

Cited by 10 publications

References 52 publications

Effect of Ellipticity on Cavitation Mechanism and Thermal Effect of Elliptical Journal Bearings

Effect of Ellipticity on Cavitation Mechanism and Thermal Effect of Elliptical Journal Bearings

Analysis of static and dynamic characteristics of aerostatic bearing with reflux orifices

Prediction on Flow and Thermal Characteristics of Ultrathin Lubricant Film of Hydrodynamic Journal Bearing

Contact Info

Product

Resources

About