Tham khảo tài liệu 'modern tribology handbook 2010 part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | FIGURE ISO viscosity grade for lubricating oils. Points A B and the line drawn through them refer to Example 2. From Raimondi . and Szeri . 1984 Journal and thrust bearings in CRC Handbook of Lubrication Vol. 2 Booser . Ed. CRC Press Boca Raton FL. With permission. Qs X 10-3 m3 s H MW AT C The operating temperature is T 45 2 C and we plot point B in Figure . The line drawn from A to B intersects the ISO VG 32 line at Ts C and X 10-2 Pa s giving the effective temperature and effective viscosity that is consistent with the operating conditions of the bearing under the assumption that a single viscosity can portray bearing performance. The final Reynolds number Sommerfeld number and minimum film thickness are Re 1583 s h X cm n Pivoted-Pad Journal Bearings In many applications the bearings are constructed of several identical pads. Multipad bearings in general dissipate less energy than full bearings. However they too are unable to damp out unwanted rotor vibrations. This becomes a problem especially when attempting to operate the rotor in the neighborhood of a system critical speed. For this reason the pads are often pivoted in one point or along a line. Pivoted 2001 by CRC Press LLC FIGURE ISO viscosity grade for lubricating oils. Points A B and the line drawn through them refer to Example 2. From Raimondi . and Szeri . 1984 Journal and thrust bearings in CRC Handbook of Lubrication Vol. 2 Booser . Ed. CRC Press Boca Raton FL. With permission. Qs X 10-3 m3 s H MW AT C The operating temperature is T 45 2 C and we plot point B in Figure . The line drawn from A to B intersects the ISO VG 32 line at Ts C and X 10-2 Pa s giving the effective temperature and effective viscosity that is consistent with the operating conditions of the bearing under the assumption that a single viscosity can portray .
