Hydrodynamic Lubrication 2009 Part 8 docx

... 6.7a–c. Pressure and clearance distribution in a single cylinder head [15]. a β = 2. 48, b β = 5. 08, c β = 9.53 1 28 6 Foil Bearings the maximum pressure (pressure spike) and the minimum pressure (pressure ... bearing Fig. 6.1a developed on a straight line. In a foil bearing, particularly when the wrap angle 130 6 Foil Bearings Fig. 6 .8. Dependence of h ∗ , h min , p max , and p min on β [...

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... Contents 8. 5.6 Analysis Considering Inertia Forces 180 8. 5.7 Comparison of Calculated Results and Experiments 184 8. 6 Temperature Analyses of Circular Journal Bearings 185 8. 6.1 Basic Equations 187 8. 6.2 ... 154 References 159 8 Heat Generation and Temperature Rise 161 8. 1 Basic Equations for Thermohydrodynamic Lubrication 162 8. 2 Generalized Reynolds’ Equation . 163 8. 2.1...

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... θ = 0 (3.57) 2R  π 0  L/2 0 p sin φdzdφ − P 1 sin θ = 0 (3. 58) By substituting Eq. 3.56 into the above equations and using the partial fraction decomposition method and J 3 , J 2 , and J 1 in ... unit time N = U/(2πR): p m µN  c R  2 = 12π 2 κ (2 + κ 2 )(1 − κ 2 ) 1/2 (3. 28) The left-hand side of Eq. 3. 28 is a combination of the dimensions of the bearing and some variables represent...

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... 4, 1970, pp. 5 78 - 587 . 8. P. Fowles, “A Simpler Form of the General Reynolds Equation”, Trans. ASME, Journal of Lubrication Technology, October 1970, Vol. 92, pp. 661 - 662. 192 8 Heat Generation ... Trans. ASME, Journal of Lubrication Tech- nology, Vol. 1 08, October 1 986 , pp. 621 - 627. 23. K. W. Kim, M. Tanaka and Y. Hori, “An Experimental Study on the Thermohydrodynamic Lubr...

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... work–energy principle, then, is: (10 .8. 15) or (10 .8. 16) or (10 .8. 17) If the pendulum is to rise all the way to the vertical equilibrium position (θ = π), we have: (10 .8. 18) If is exactly 4gᐉ, the pendulum ... generalized forces, it is helpful to first determine the partial velocities of the particles, the partial velocities of the mass center G of T and the partial angular velocities...

Ngày tải lên: 10/08/2014, 20:20

... is 2 Foundations of Hydrodynamic Lubrication The essence of hydrodynamic lubrication was first clarified experimentally by British railroad engineer Beauchamp Tower ( 184 5 – 1904) in 188 3 [1][2]. Based ... experiments and studied them theoretically. In the introductory part of his famous paper of 188 6 [3] on hydrodynamic lubrication, Reynolds wrote: Lubrication, or the action...

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... August 1 987 , pp. 180 7 - 181 4. 18. S. Fukui and R. Kaneko, “Analysis of Ultra-Thin Gas Film Lubrication Based on Lin- earized Boltzmann Equation: 1st Report - Derivation of a Generalized Lubrication Equation ... Interferometry” (in Japanese), Trans. JSME, C, Vol. 53, No. 487 , March 1 987 , pp. 83 9 - 84 7. 17. S. Fukui and R. Kaneko, “Analysis of Ultra-Thin Gas Film Lubrication...

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... shaft. 5.2 Oil Whip Theory 81 Fig. 5.10. Locus of the journal center for finite length bearings [ 18] Fig. 5.11. Eccentricity of the journal for finite length bearings [ 18] ditions can be discussed ... before. Fig. 5.8a,b. Small vibrations (a) and large vibrations (b) [14] Large vibrations mean such vibrations (whirling) of the shaft that it bends con- siderably as shown in Fig. 5.8a,bb. I...

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... 6 ∂h ∂φ + 12 ∂h ∂t (5 .83 ) On substituting Eq. 5 .82 into Eq. 5 .83 , it becomes obvious that nonlinearity of the third order in X 1 and X 2 is inherently present in Eq. 5 .83 . However, the equation is ... to the pedestal: ¨ X B = 0 (5.79) ¨ Y B = A sin(ω e t), 0 ≤ t ≤ 2π/ω e (5 .80 ) A = 0.05G, 0.1G, 0.3G,ω e = 0 .8 c (5 .81 ) Three values of acceleration are considered (G = the gravitati...

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... 1.2 681 5.9031 -2.1143 = 2 -2.44 68 0.9712 -2.1143 2.5770 = 11 = 12 = 22 = 13 = 14 = 23 = 24 23.2595 -0.14 78 -8. 9769 -9.7937 1.9934 -3. 089 2 -2.4369 -7.7506 -0 .87 30 3. 389 8 2.0613 5.3423 -2.76 28 3.0995 As ... JSME, Vol. 61, No. 4 78, November 19 58, pp. 13 48 - 1356. 15. Y. Hori, “A Theory of Oil Whip”, Trans. ASME, Series E, J. of Applied Mechanics, Vol. 26, No. 2, June 1959, pp....

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