Hydrodynamic Lubrication 2009 Part 14 pps

... “Turbulent Lubrication Theory Using the Frictional Law (First Report, Derivation of Turbulent Coefficient and Lubrication Equation)” (in Japanese), Trans. JSME, Vol. 44, No. 382, June 1978, pp. 2140 - 2148 . 27. ... 87 half-speed whirl 65 heat generation 161 Hermann’s variational method 150 Holm, R. 6 hydrodynamic bearing 23 hydrodynamic lubrication 3, 6, 9 hydrostatic bearing 23 infin...

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... experiments and studied them theoretically. In the introductory part of his famous paper of 1886 [3] on hydrodynamic lubrication, Reynolds wrote: Lubrication, or the action of oils and other viscous fluids ... called the clearance circle. The clearance circle is 2 Foundations of Hydrodynamic Lubrication The essence of hydrodynamic lubrication was first clarified experimentally by...

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... (Part 1)” (in Japanese), Trans. JSME, Vol. 37, No. 295, March 1971, pp. 583 - 592. 11. S. Wada and H. Hayashi, “Application of Finite Element Method to Hydrodynamic Lu- brication Problems (Part ... interesting indeed that hydrodynamic lubrication theory was developed from the investigation into journal bearings, and thrust bearings were invented in turn as an application of lubricati...

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... Basic Equations for Thermohydrodynamic Lubrication Hydrodynamic lubrication that takes heat generation and temperature rise into con- sideration is called thermohydrodynamic lubrication, orTHL. To ... inside solid parts: ∂ 2 T ∂x 2 + ∂ 2 T ∂y 2 + ∂ 2 T ∂z 2 = 0 6. Equation of heat transfer at the surface of solid parts: Q = h c (T s − T a ) 7. Equation of heat expansion of solid parts:...

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... force sensitivity S Vf in volts per newton (V/N) is given by (14. 21) where again depends on the mounting configuration. Both eqs (14. 20) and (14. 21) can be expressed in the Fourier domain by replacing ... an exception. 14. 7 Absolute-motion measurement 14. 7.1 The seismic instrument Consider a single-degree-of-freedom mass-spring-damper system mounted within a case, as shown in Fig....

Ngày tải lên: 10/08/2014, 20:20

... [1] in relation to electric contacts. 1.2.2 Hydrodynamic Lubrication Hydrodynamic lubrication, which is the subject of this book, is an ideal state of lubrication in that friction and wear hardly ... Y. H . 4 1 Friction, Wear, and Lubrication the hydrodynamic lubrication described above and boundary lubrication which will be explained later and is called mixed lubrication. S...

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... ¯x  +  D L  2 ∂ ∂¯z  ¯ h 3 ∂ ¯p ∂¯z  = 12 ∂ ¯ h ∂ ¯x (3.68) Fig. 3 .14. Grid on a lubricating surface The lubricating domain is divided into a grid pattern as shown in Fig. 3 .14 and then the three derivatives in the above ... 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...

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... the oil whip phenomenon satisfactorily. In calculating the oil film force, Hori (1955)[6, 7](1958) [14] (1959)[15, 16] (1) used G ¨ umbel’s (or the half-Sommerfeld) boundary condition instead of Sommer- feld’s ... point of the journal, as stated 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 c...

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... state because of an earthquake. 5.2 Oil Whip Theory 85 Fig. 5 .14. Stability chart for small vibrations and for large vibrations [14] .  a 1 a 2 shows the path followed by a light shaft as the ... amplitude, the journal center performs steady revolution around the bearing center for the major part of the bearing length, as shown in Fig. 5.8a,bb. Therefore, by setting the time derivative .....

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... 36.51 d ij j = 1 = 2 = 3 = 4 i = 1 3.4255 1.2681 5.9031 -2. 1143 = 2 -2.4468 0.9712 -2. 1143 2.5770 = 11 = 12 = 22 = 13 = 14 = 23 = 24 23.2595 -0 .147 8 -8.9769 -9.7937 1.9934 -3.0892 -2.4369 -7.7506 -0.8730 ... - 140 8. 25. A. Cameron, “Principles of Lubrication , Longman, London, 1966 26. F.K. Orcutt and E.B. Arwas, “The Steady State and Dynamic Characteristics of a Full Cir- cular Bea...

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