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Gyroscopic Effect on the Ball of Bearing with Defect on the Outer Race

Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License

Abstract. Gyroscopic effect is seen on a bearing system with a central load in form of a disk. The bearings rotate in one plane and if the shaft is made to precede in vertical direction a gyroscopic reactive couple tents to act on the two bearings lowering one and raising one. I have tried to apply the gyroscopic principle on the balls of the bearing. The ball spinning in anticlockwise direction in one plane if dislocated in the downward direction due to any defect on the outer ring and a constant axial load applied by central disc then due to gyroscopic effect a gyroscopic reactive couple tends to spin the ball in left direction under a constant axial load applied on the bearings. Thus there will be impact of the ball of bearings with the left side of the inner race which will result in more vibration on that side which will result in more stress in that area, this is verified using a finite element analysis software and also is experimentally verified using FFT analyzer respectively using a bearing test rig prepared for this experiment.

Keywords: Gyroscope, reactive couple, stress, vibrations

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DOI: http://dx.doi.org/10.12983/ijsrin-2015-p001-008

 

Variation Calculus Minimum Time Functional Equation for Crack Propagation Using Euler’s Equation

Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License

Abstract. Ball bearing is a good example of contact stress. Here the contact area made is elliptical in nature. This paper presents a complete new concept of crack formation and crack propagation respectively. Using Euler’s equation of variation the path of the crack is predicted. The equation is then verified experimentally. Although many papers have been written on crack path equation, but the uniqueness of this paper is that the mechanism explained behind the crack formation and the equation experimentally proving it at different parameters in the same dimension.

Keywords: Euler’s equation, Elliptical area, Time functional, Sine curve.

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DOI: http://dx.doi.org/10.12983/ijsrin-2015-p009-014

 

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