Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/72256
Title: Investigation of passive bearing for biomedical applications
Authors: Tham, Denise Wai Xi
Keywords: DRNTU::Engineering
Issue Date: 2017
Abstract: The Muijderman Equation was the basis for geometry modifications in this project. This was aimed at achieving positive pressure generation between the rotating spiral groove bearing and the stationary housing for hydrodynamic lift with varying geometrical parameters when the axial clearance gap between the two is 0.2mm. Previous investigations were conducted on a wide array of bearings and the I14O1420L spiral groove bearing was selected for this project to study the correlation between an increasing groove height at the outer radius and the pressure distribution within the spiral groove bearings. This series of tests were done with the aid of Computational Fluid Dynamics (CFD) whereby accurate and reliable results were presented and conclusions on the effects of a varying groove height were made. In the light of the Modified Muijderman Equation, the consistency of the results in this study emphasized on the impact of the inertia effects whereby higher rotational speeds resulted in higher negative differential pressure in the bearings. The determinant to a conclusion was to allow the optimal bearing to be simulated at an ideal rotational speed at various fluid film thicknesses such that comparisons against the original I14O1420L could be made. The results have proven that the I14O1420L bearing remains the best among its family of modified bearings.
URI: http://hdl.handle.net/10356/72256
Rights: Nanyang Technological University
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:MAE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
Final Report 2.pdf
  Restricted Access
5.69 MBAdobe PDFView/Open

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.