The dynamic behaviour of fluid bearings with grooved lands

Mohsin, M. Ezzat; Seif, A.; Shaheen, Mohammed

doi:10.1016/0301-679x(86)90019-8

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…The bearing stiffness and damping coeffi cient are calculated by dividing the increment of the lubricating fi lm force (given by the integration of pressure distribution in the circumferential direction) by the increment of the eccentricity and the squeezing velocity, respectively 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Herringbone‐grooved bearing with non‐uniform grooves for high‐speed spindle

Ikeda

Arakawa

Hishida

et al. 2010

Lubrication Science

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A hydrodynamic bearing with non-uniform herringbone grooves has been developed for use with highspeed motor spindles. The grooves gradually become narrower, shallower and less straight (curved) towards the herringbone centre along axial direction, resulting in an increased pumping effect of the spiral grooves. The optimum dimensions of the grooves for increasing the critical bearing number were clarifi ed theoretically, and bearings with non-uniform herringbone grooves were found to increase the critical bearing number against the half-frequency whirl up to about 50% in comparison to bearings with uniform herringbone grooves. Experiments to investigate the suitability of the proposed bearing for high-speed spindles showed that the maximum rotational speed of a spindle with this bearing was about 20% higher, close to the theoretically predicted 23%, and thus proved that application of this bearing should enable spindles to achieve faster stable rotation as theoretically expected.

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Section: Introductionmentioning

confidence: 99%

Herringbone‐grooved bearing with non‐uniform grooves for high‐speed spindle

Ikeda

Arakawa

Hishida

et al. 2010

Lubrication Science

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Total Cross Flow (TCF) Hydrostatic Journal Bearing: A Review

Kumar¹

2015

IJARI

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Hydrostatic bearings are used extensively in machine tool application due to their high load carrying capacity, no stick-slip, very low friction at low or zero speed, high stiffness and damping characteristics. If the features of circumferential grooved land and external return flow system incorporate in the conventional Hydrostatic bearing design , it turns to a new bearing design that is Total Cross Flow (TCF design = Conventional design + Circumferential grooved land + External return flow system) hydrostatic bearing. This new externally pressurized bearing overcomes most of the side effect of conventional journal Bearing (CJB) like undesirable hydrodynamic effect associated with the oil turbulence and critical rise in temperature. TCF bearing are also consider suitable for high speed application along with good damping and stiffness characteristic with low temperature rise. Reduce drag power loss, fast temperature stabilization, and stability at high rotational speed are the other meritorious properties of TCF bearing. A detailed summery of literature review on TCF bearing covering different performance characteristics like total power loss, recesses pressure, squeeze load, temperature distribution, fluid flow, damping and stiffness coefficients are discussed and tabulated. It is observed through literature review that most of the studies on TCF journal bearing are experimental except analytical study made by Kumar et al. [7] and it is emphasized to carry out analytical and modeling work to validate or to analyze different features and aspects related to bearing configuration, lubricant properties, and type of restrictors etc.

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The dynamic behaviour of fluid bearings with grooved lands

Cited by 2 publications

References 4 publications

Herringbone‐grooved bearing with non‐uniform grooves for high‐speed spindle

Herringbone‐grooved bearing with non‐uniform grooves for high‐speed spindle

Total Cross Flow (TCF) Hydrostatic Journal Bearing: A Review

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