Numerical review of friction forces in microbearings with curvilinear journals

• Autorzy: Wierzcholski K.
• Języki publikacji: EN

Abstrakty

EN

The research showed in this paper lead to presentation of hydrodynamic HDD micro-bearing with orthogonal curvilinear profile of journal for example for conical, hyperbolic and other cooperating micro-bearing surfaces. Pressure distributions and load carrying capacity values on the conical micro-bearing journals are calculated. The formulae describing the friction forces and friction coefficients for micro-bearing curvilinear journals are derived. Up to now, the dynamic behavior of HDD micro-bearings was considered mostly by Jang at al. (2005). Presented paper indicates that on the memory capacity have influence not only herringbone or spiral grooves but in many cases the shapes of micro-bearing journals and sleeves too.

Słowa kluczowe

EN

friction; microbearings

PL

tarcie; mikrołożysko

• Wydawca: Oficyna Wydawnicza Politechniki Białostockiej
• Czasopismo: Acta Mechanica et Automatica
• Rocznik: 2008
• Tom: Vol. 2, no. 4
• Strony: 102--105
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Wierzcholski K.

• Institute of Applied Mathematics, Pomeranian University Slupsk, 76-200 Słupsk, ul. Arciszewskiego 22, Poland,

Bibliografia

• 1. Bhushan B.(2007) Nano-tribology and nano-mechanics of MEMS/NEMS and BioMEMS, BioNEMS materials and devices, Microelectronic Engineering,, 84, 387-412.
• 2. Jang G.H., Lee S.H., Kim H.W., Kim C.S.(2005) Dynamic analysis of a HDD spindle system with FDBs due to the bearing width and asymmetric grooves of journal bearing, Microsystems Technologies, 11, 499-505.
• 3. Jang G. H., Seo C.H., Ho Scong Lee (2007) Finite element model analysis of an HDD considering the flexibility of spinning disc-spindle, head-suspension-actuator and supporting structure, Microsystem Technologies, 13, 837-847.
• 4. Jang G. H., Park S.J., Kim C.S., Han J.H. (2007) Investigation of the electromechanical variables of the spindle motor and the actuator of HDD due to positioning and the free fall, Microsystem Technologies, 13, 797-809.
• 5. Jang G.H.,Yoon W. (2002) Dynamic characteristics of a coupled journal and thrust hydrodynamic bearing in a HDD spindle system due to its groove location. Microsystem Technologies 8, Springer Verlag, 261-270
• 6. Liu L.X., Spakovszky Z. S.( 2007) Effects of Bearing Stiffness Anisotropy on Hydrostatic Micro gas Journal Bearing Dynamic Behavior, ASME, Journal of Engineering for Gas Turbines and Power, Vol. 129, 177-184.
• 7. Wierzcholski K.: (2007) Bio and slide bearings; their lubrication by non-Newtonian fluids and application in non-conventional systems, Vol. I, Second Edition: Principles of Human Joint Lubrication. Monograph, Gdańsk University of Technology
• 8. Wierzcholski K., Miszczak A. (2007): Flow on the bio cell surfaces as an element of the micro-bearing tribology. Journal of Kones Powertrain and Transport, Vol. 14, No. 2, 553-560.
• 9. Wierzcholski K.(2006): Experimental measurements of friction forces on the tissue in probabilistic view, Journal of Kones Powertrain and Transport, Vol. 13, No. 3, 427-435.
• 10. Yong-Bok Lee, Hyun-Duck Kwak, Chang-Ho-Kim, Nam-Soo Lee (2005) Numerical prediction of slip flow effect on gas-lubricated journal bearing for MEMS/MST- based micro-rotating machinery, Tribology International, 38, 89-96.