Effects of shaft surface texture on journal bearing pressure distribution

Sınanoğlu, Cem; Nair, Fehmi; Karamış, Mehmet

doi:10.1016/j.jmatprotec.2005.02.252

Cited by 65 publications

(41 citation statements)

References 13 publications

(11 reference statements)

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“…However, the local change of surface characteristics, in particular surface thermal resistance, can be caused due to the surface treatment by local melting, hardening or generating regular surface texture and discrete coatings that are often applied in the engineering practice [15][16][17][18][19][20]. At the same time, certain elements of contacting surfaces are in different conditions, subjected to oxidation, wear, destruction under the action of a medium, and contamination in different regions.…”

Section: Introductionmentioning

confidence: 99%

Thermal rectification between two thermoelastic solids with a periodic array of rough zones at the interface

Chumak¹,

Martynyak²

2012

International Journal of Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 99%

Thermal rectification between two thermoelastic solids with a periodic array of rough zones at the interface

Chumak¹,

Martynyak²

2012

International Journal of Heat and Mass Transfer

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“…Equations (3), (6), and (9) were solved by iterative method. Assuming the oil temperature distribution in the bearing, oil viscosity is calculated with (9) and oil film pressure is solved with (3).…”

Section: + ( )mentioning

confidence: 99%

“…Research on the performance of bearing with irregular clearance is mainly focused on groove or microtexture [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Influence of Varnish on Bearing Performance and Vibration of Rotating Machinery

Zhang

Yang

Shi

et al. 2017

International Journal of Rotating Machinery

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Varnish is a kind of fouling adhered on bearing inner face near the load zone. The model to analyze its influence on bearing performance and rotor vibration was set up. Pressure and temperature distribution were solved on the basis of the Reynolds equation by the iteration method simultaneously. It is found that bearing performance is changed by the step flow effect at the leading edge of the varnish. Its influence is more obvious when the rotating speed is low. Bearing varnish results in a large decrease of minimum clearance and an increase in the oil film temperature and pressure. Loading capacity of bearing is also decreased. It is harmful to the bearing. With the varnish, the minimum oil film thickness decreases. This leads to an increase of bearing stiffness and damping coefficients. Its influence is larger in the horizontal direction than that in the vertical direction. The trend of unbalance response to rotating speed is similar. There is little influence of the varnish on the modal frequency. However, system stability is improved due to the increased bearing damping coefficients.

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“…Different forms of surface texturing can be used for this purpose; e.g., waves (Salama (1)), asperities (Anno,et al (2); Hamilton,et al (3)), dimples (Etsion and Burstein (4)), etc. In the last decade surface texturing in the form of micro-dimples was successfully used in several applications involving; for example, linear sliding in thrust bearings (Brizmer,et al (5); Rahmani,et al (6)), mechanical seals (Yu,et al (7); Etsion, et al (8)), reciprocating sliding with squeeze effect in piston rings (Kligerman,et al (9)), rotation in journal bearings (Lu and Khonsari (10); Ausas,et al (11); Sinanoglu, et al (12); Galda,et al (13)), circumferential gas seals (Kligerman and Etsion (14)), etc. A review on surface texturing can be found in Etsion (15).…”

Section: Introductionmentioning

confidence: 99%

“…They showed that dimples of proper size, shape, and depth can reduce the friction compared to an untextured case. Sinanoglu, et al (12) showed experimentally that the tribological performance of a journal bearing can be improved by surface texturing of the shaft. Kligerman and Etsion (14) developed a theoretical model to investigate the effect of surface texturing on the performance of a circumferential gas seal.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Surface-Textured Elastomer Sleeve in Lubricated Rotary Sliding

Shinkarenko

Kligerman

Etsion

2010

Tribology Transactions

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A soft elastohydrodynamic lubrication (SEHL) model is presented that consists of a stationary surface-textured soft elastomer sleeve and a rigid, smooth rotating shaft. The Reynolds equation and the equation of linear elasticity are solved simultaneously for the pressure distribution and viscous shear stresses in the fluid film and for the elastic stresses and deformations in the elastomer. An extensive parametric analysis is performed to evaluate the optimum parameters of the surface texturing for minimum friction coefficient. The transition from full hydrodynamic to mixed lubrication is also analyzed. It is shown that the model is also valid for predicting friction coefficient of various types of circumferential elastomer seals.

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Effects of shaft surface texture on journal bearing pressure distribution

Cited by 65 publications

References 13 publications

Thermal rectification between two thermoelastic solids with a periodic array of rough zones at the interface

Thermal rectification between two thermoelastic solids with a periodic array of rough zones at the interface

Influence of Varnish on Bearing Performance and Vibration of Rotating Machinery

Theoretical Analysis of Surface-Textured Elastomer Sleeve in Lubricated Rotary Sliding

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