Gas Turbine Engine Mainshaft Roller Bearing-System Analysis

Rumbarger, J. H.; Filetti, E. G.; Gubernick, D.

doi:10.1115/1.3451843

Cited by 54 publications

(31 citation statements)

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“…6, 8, can be used for the accurate prediction of slip if the loss torque is known. Loss torque can often be extrapolated from past experience of similar installations, but where this is not possible there are a number of theoretical methods [8,9,10] which can be used. Unfortunately, empirical factors are still needed to account for the strong influence of the lubrication method, housing design and scavenge arrangement on loss torque.…”

Section: Methodsmentioning

confidence: 99%

The Effects of Elastohydrodynamic Traction Behavior on Cage Slip in Roller Bearings

Ford

Foord

1974

Journal of Lubrication Technology

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A simple theoretical model of a bearing and measured traction curves are used to explain the different types of experimentally observed cage behavior which result from different lubricants. Traction curves with a pronounced peak are shown to produce unstable cage slip behavior, although bearings can operate steadily in the high slip region. The instability occurred in tests with a high traction fluid but not with ester-type gas turbine lubricants. A bench-top roller bearing rig of the type used in these experiments provides an effective method of assessing the tractive properties of lubricants, using a 25-ml sample.

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Section: Methodsmentioning

confidence: 99%

The Effects of Elastohydrodynamic Traction Behavior on Cage Slip in Roller Bearings

Ford

Foord

1974

Journal of Lubrication Technology

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“…It can be shown that the domain of 7 in equations (1) to (3) is -7, < 7 < 7, where T > = 2 arctan LJ2TOTC1^YHT=^] J (4) For small values of s (typically 0.1 for a high-speed roller bearing) and a relatively large value of c (say 0.7; the domain of c being 0 to 1), y x will be small. For instance, s = 0.1 and c = 0.7 give 7, = 3.6°.…”

Section: T =U C (R+r)cosy + Oi R Zcos(d + Y)mentioning

confidence: 99%

“…Several analytical models have been developed for the prediction of slip in roller bearings under different conditions [1][2][3][4][5][6]. Although reasonable agreement with experimental observations has been achieved for bearings operating under full elastohydrodynamic conditions, appreciable discrepancies can arise under high-speed and light load conditions.…”

Section: Introductionmentioning

confidence: 99%

An Advanced Apparatus for the Study of Roller and Cage Slip in High-Speed Roller Bearings

Markho

Smith

Lalor

1981

Journal of Lubrication Technology

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This paper describes a sophisticated research facility for the study of roller bearings at DN values of over one million with provisions for the measurement of such parameters as cage and roller speeds, bearing torque and load, and bearing ring temperatures. Particular features of the apparatus are a laser Doppler anemometer (LDA) system, with the ability to measure an instantaneous roller speed at any position in the bearing, an infrared radiation thermometer for measuring the bearing inner ring temperature, hydrostatic mounting of the test spindle, and aerostatic bearings which insure a good axial location of the test bearing and form important elements of torque and load measuring facilities which are, at once, integral and independent.

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“…So the research on cage's dynamic performance attracted the interest of many researchers. Harris [I] and Rumbarger [2] have established a quasi-static bearing analysis model to predict the skip-ratio the cage. Gupta, Meeks and Ghaisas [3] developed the dynamic model to research the instability of rolling element bearing's cage.…”

Section: Introductionmentioning

confidence: 99%

Dynamic simulation of cage in high speed cylindrical roller bearing based on flexible vody method

Yang

Chen

Deng

et al. 2010

2010 International Conference on Computer Design and Applications

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This paper attempt to achieve a more accuracy simulation of high speed cylindrical bearing cage's dynamic performance. Considering the flexibility of cage, dynamic equations of cylindrical roller bearing in high speed in main shaft of aero-engine was established using modified Craig Hampton substructure mode synthesis method. Rigid-flexible dynamic simulation software of cylindrical roller bearing was developed based on the commercial software MSC. ADAMS. High speed cylindrical roller bearing simulations were carried out with different working condition, structure parameters, all the effect of these parameters were studied based on the simulation results. The results show that fatigue failure caused by vibration stress may occur at intersectional point of the cage bar and side bar. High-speed and lightly-load can result in large slip of cage, the change of inner ring speed has some more influence on slip ratio than that of outer ring. The cage pocket/guide clearance ratio can remarkably affect the bearing's stability; the simulation results suggest that a small value should be selected. The slip ratio of flexi-blew cage is slightly larger than that of the rigid one, which accords with the experimental date better.

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Gas Turbine Engine Mainshaft Roller Bearing-System Analysis

Cited by 54 publications

References 0 publications

The Effects of Elastohydrodynamic Traction Behavior on Cage Slip in Roller Bearings

The Effects of Elastohydrodynamic Traction Behavior on Cage Slip in Roller Bearings

An Advanced Apparatus for the Study of Roller and Cage Slip in High-Speed Roller Bearings

Dynamic simulation of cage in high speed cylindrical roller bearing based on flexible vody method

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