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Batra N.K.,Maharishi Markendeshwar Engineering College | Bhushan G.,National Institute of Technology Kurukshetra | Mehta N.P.,Maharishi Markendeshwar Engineering College
Advanced Materials Research | Year: 2012

Sometimes the line of action of the load does not pass through the axis of a bearing and is shifted on either side by a few degrees. The effect of load orientation on the stability of an inverted three-lobe pressure dam bearing has been studied in this paper. An inverted three lobe pressure dam bearing is produced by incorporating two pressure dams in the upper two lobes and one relief track in the lower lobe. The result shows that stability of an inverted three-lobe pressure dam bearing supporting either rigid or flexible rotor is increased for the positive values of load orientation i.e. when the load line is shifted in the opposite direction of rotation. Source


Batra N.K.,Maharishi Markendeshwar Engineering College | Bhushan G.,National Institute of Technology Kurukshetra | Mehta N.P.,Maharishi Markendeshwar Engineering College
Journal of Engineering Technology | Year: 2011

An inverted three-lobe pressure dam bearing which is produced by cutting a pressure dams on the upper lobe and two relief-tracks on the lower two lobes of an ordinary inverted three-lobe bearing is found to be more stable than an inverted three-lobe bearing. In this paper an inverted three-lobe pressure dam bearing supporting rigid and flexible rotors is analytically investigated to determine its performance when L/D ratio is varied in the range 0.8-1.5. The static and dynamic characteristics are studied at various L/D ratios. The results show that the stability of an inverted three-lobe pressure dam bearing increases with decrease in L/D ratios both for rigid as well as flexible rotors. © Journal of Engineering and Technology. Source


Mehta N.P.,Maharishi Markendeshwar Engineering College | Rattan S.S.,National Institute of Technology Kurukshetra | Bhushan G.,National Institute of Technology Kurukshetra | Batra N.K.,Maharishi Markendeshwar Engineering College
Journal of Mechanical Science and Technology | Year: 2012

The stability of an ordinary journal bearing is found to increase by the use of multi-lobes. The performance can be further improved by the incorporation of pressure dam into these bearing. This paper analyzes the dynamic behavior of a new type of bearing, namely, an inverted three-lobe pressure dam bearing. An inverted three-lobe pressure dam bearing is produced by incorporating a pressure dam in the upper lobe and two relief tracks in the lower two lobes of an ordinary inverted three-lobe bearing. The characteristic curves of this bearing show that it is much more stable as compared to an ordinary inverted three-lobe bearing. © 2012 The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg. Source


Batra N.K.,Maharishi Markendeshwar Engineering College | Bhushan G.,National Institute of Technology Kurukshetra | Mehta N.P.,Maharishi Markendeshwar Engineering College
Tribology Transactions | Year: 2012

The ellipticity ratio is one of the major parameters that affect the performance of multilobe bearings. This article analyzes the effect of ellipticity ratio on the performance of an inverted three-lobe pressure dam bearing. The performance of an inverted three-lobe pressure dam bearing was found to be better than that of an inverted three-lobe bearing by incorporating a pressure dam in the upper lobe and two relief tracks in the lower two lobes of an ordinary inverted three-lobe bearing. Evaluation of experimental work on ellipticity ratios was done in three steps, viz. 0.4, 0.5, and 0.6, and the results showed that the stability of an inverted three-lobe pressure dam bearing was increased with an increase in the value of the ellipticity ratio. Copyright © Society of Tribologists and Lubrication Engineers. Source

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