A plane-inclined pad thrust bearing is 160mm wide and 40mm long in the direction of sliding. The sliding velocity is 6m/s and the bearing is supported so that the inlet film thickness is always three times the outlet film thickness. A load 18kN is carried by the bearing and Tellus 37 oil is supplied at an inlet temperature of 40°C. Assuming that 80% of the heat generated in the bearing is away by the oil, describe the operating characteristics of the bearing (Pm, Q, F, tm). Density is 875 kg/m and specific heat is c, carried = 1.880 J/g-K. Table 5.1 Variation of dimensionless coefficients p..Q.W and F for a wide hydrodynamic thrust bearing with film thickness ratio h/h, 1.25 1.5 1.75 2.0 2.1889 2.25 2.5 2.75 3.0 3.25 3.5 3.75 4.0 K 0.25 0.5 0.75 1.0 1.1889 1.25 1.5 1.75 2.0 2.25 2.5 2.75 3.0 0.1333 0.2000 0.2338 0.2500 0.2555 0.2564 0.2571 0.2545 0.2500 0.2443 0.2381 0.2316 0.2250 0.5556 0.6000 0.6364 0.6667 0.6804 0.6923 0.7143 0.7333 0.7500 0.7647 0.7778 0.7895 0.8000 0.0884 0.1312 0.1511 0.1589 0.1602 0.1601 0.1577 N420 0.6836 0.1533 0.1479 0.1360 0.1300 0.1242 F 0.9036 0.8437 0.8028 0.7726 0.7542 0.7488 0.7292 0.7122 0.6972 0.6711 0.6594 0.6494
A plane-inclined pad thrust bearing is 160mm wide and 40mm long in the direction of sliding. The sliding velocity is 6m/s and the bearing is supported so that the inlet film thickness is always three times the outlet film thickness. A load 18kN is carried by the bearing and Tellus 37 oil is supplied at an inlet temperature of 40°C. Assuming that 80% of the heat generated in the bearing is away by the oil, describe the operating characteristics of the bearing (Pm, Q, F, tm). Density is 875 kg/m and specific heat is c, carried = 1.880 J/g-K. Table 5.1 Variation of dimensionless coefficients p..Q.W and F for a wide hydrodynamic thrust bearing with film thickness ratio h/h, 1.25 1.5 1.75 2.0 2.1889 2.25 2.5 2.75 3.0 3.25 3.5 3.75 4.0 K 0.25 0.5 0.75 1.0 1.1889 1.25 1.5 1.75 2.0 2.25 2.5 2.75 3.0 0.1333 0.2000 0.2338 0.2500 0.2555 0.2564 0.2571 0.2545 0.2500 0.2443 0.2381 0.2316 0.2250 0.5556 0.6000 0.6364 0.6667 0.6804 0.6923 0.7143 0.7333 0.7500 0.7647 0.7778 0.7895 0.8000 0.0884 0.1312 0.1511 0.1589 0.1602 0.1601 0.1577 N420 0.6836 0.1533 0.1479 0.1360 0.1300 0.1242 F 0.9036 0.8437 0.8028 0.7726 0.7542 0.7488 0.7292 0.7122 0.6972 0.6711 0.6594 0.6494
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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