Boundary slip surface design for high speed water lubricated journal bearings

Zhou, Hui; Hua, Meng; Dong, Guangneng; Zhang, Dongya; Chin, Kwai‐Sang

doi:10.1016/j.triboint.2014.05.022

Cited by 55 publications

(60 citation statements)

References 21 publications

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“…where, M is the mass of the shaft, W X (t) and W Y (t) are X and Y components of the load carrying capacity W, w X (t) and w Y (t) are X and Y components of the applied load w. To solve strong coupling equations (17), the adapted method [26] is based on the following Newmark scheme…”

Section: Extension To Dynamical Problemsmentioning

confidence: 99%

See 1 more Smart Citation

A velocity-slip model for analysis of the fluid film in the cavitation region of a journal bearing

Cheng

2016

Tribology International

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The Reynolds equation is derived by using the continuity equation, Navier-Stokes equation and slip length equation within cavitation region. A are used to obtain the static and dynamic parameters of journal bearing. A comparison with the available experimental results reveals that the load capacity is well predicted by the present model. The results also show that slip effects in the cavitation region have an influence on the oil film pressure, the load capacity, the dynamic characteristics coefficients and the stability of journal bearing. The good behavior of the proposed algorithm is further illustrated in one example of a dynamically loaded journal bearing, and evolution with time of the journal center is well obtained.

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Section: Extension To Dynamical Problemsmentioning

confidence: 99%

“…Recently, some studies by Zhang et al [17] and Rao et al [18] have reported that, the boundary slippage occurs on the texturing surface of journal bearing or in a high speed condition. However, there are no reports available in the literature with regard to a slip effect in the cavitation zone of a journal bearing.…”

Section: Introductionmentioning

confidence: 99%

A velocity-slip model for analysis of the fluid film in the cavitation region of a journal bearing

Cheng

2016

Tribology International

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“…It is found that when the ultimate shear stress of the sliding surface is equal to zero, the hydrodynamic bearing capacity of the bearing is half that of the non-slip surface, but the corresponding surface friction force is reduced by several orders of magnitude. Considering the slip and applying the flow conservation boundary condition to the cavitation area, the classical Reynolds equation was modified and the parameters of the partial slip surface were optimized through simulation by Zhang Hui [5] . The boundary slip effect on the load capacity is closely related to the matching of the sliding property between the motion and the static surface.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of influence of boundary slip on lubrication performances considering cavitation of textured surface

2019

Proceedings of 2019 the 9th International Workshop on Computer Science and Engineering

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A finite element calculation model of friction pairs with different micro texture features was established. Considering the condition of surface texture cavitation, numerical calculation was carried out by computational fluid dynamics (CFD) software to study the influence of the fluid-solid boundary slip on the lubrication performance of the friction pair under the hydrodynamic lubrication condition. The results demonstrate that the friction and bearing capacity of the lubricating film are reduced by the boundary slip, and the calculation results of the lubrication performance are influenced by the boundary condition of the cavitation caused by the micro texture; using the cavitation boundary condition, the boundary slip effect is enhanced and the theoretical comprehensive lubrication performance is improved; Compared with texture with cross section of triangle, rectangle and ellipse, the spherical texture facilitates carrying capacity improvement and there is the texture geometry size that facilitates lubrication property optimization.

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“…The velocity slip in the cavitation region can occur and change the cavitation boundary condition of oil film and affects the dynamic behaviors of the journal bearing. 8,9 Therefore, the velocity slip in the cavitation region plays an important role in solving the dynamic coefficients of the journal bearing and also influences the dynamic performance of a rotor-bearing system.…”

Section: Introductionmentioning

confidence: 99%

Identification of dynamic coefficients of the journal bearing considering velocity slip of cavitation zone in the rotating spindle unit

Cheng

2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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A rotating spindle unit, supported by the journal bearings, is developed to improve the cavitation erosion resistance of the journal bearing as well as the spindle dynamic performance. The turbulent lubrication model considering velocity slip in cavitation zone is derived, and the static and dynamic parameters of the journal bearing are obtained. An identification algorithm is further derivated to identify simultaneously the 16 dynamic coefficients of the two journal bearings in the spindle unit. The available experimental results reveal that the journal bearing coefficients are well predicted and estimated by the present model, and the estimated bearing parameters by regularization solution are in good agreement with the assumed values, while it has opposite effect by directed solution for discrete ill-posed problems. It is concluded that the identification accuracy of bearing parameters is governed by the displacement error, and the percentage deviation of dynamic coefficients decreases with the decrease of the displacement error.

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Boundary slip surface design for high speed water lubricated journal bearings

Cited by 55 publications

References 21 publications

A velocity-slip model for analysis of the fluid film in the cavitation region of a journal bearing

A velocity-slip model for analysis of the fluid film in the cavitation region of a journal bearing

Numerical simulation of influence of boundary slip on lubrication performances considering cavitation of textured surface

Identification of dynamic coefficients of the journal bearing considering velocity slip of cavitation zone in the rotating spindle unit

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