A circumferential-groove pressure-fed bearing is lubricated with SAE grade 20 oil sup- plied at a gauge pressure of 30 psi. The journal diameter d; is 1.750 in, with a unilateral tolerance of –0.002 in. The central circumferential bushing has a diameter d, of 1.753 in, with a unilateral tolerance of +0.004 in. The l' /d ratio of the two “half-bearings" that constitute the complete pressure-fed bearing is 1/2. The journal angular speed is 3000 rev/min, or 50 rev/s, and the radial steady load is 900 lbf. The external sump is maintained at 120°F as long as the necessary heat transfer does not exceed 800 Btu/h. (a) Find the steady-state average film temperature.
A circumferential-groove pressure-fed bearing is lubricated with SAE grade 20 oil sup- plied at a gauge pressure of 30 psi. The journal diameter d; is 1.750 in, with a unilateral tolerance of –0.002 in. The central circumferential bushing has a diameter d, of 1.753 in, with a unilateral tolerance of +0.004 in. The l' /d ratio of the two “half-bearings" that constitute the complete pressure-fed bearing is 1/2. The journal angular speed is 3000 rev/min, or 50 rev/s, and the radial steady load is 900 lbf. The external sump is maintained at 120°F as long as the necessary heat transfer does not exceed 800 Btu/h. (a) Find the steady-state average film temperature.
Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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![A circumferential-groove pressure-fed bearing is lubricated with SAE grade 20 oil sup-
plied at a gauge pressure of 30 psi. The journal diameter d; is 1.750 in, with a unilateral
tolerance of -0.002 in. The central circumferential bushing has a diameter d of
1.753 in, with a unilateral tolerance of +0.004 in. The l' /d ratio of the two “half-bearings"
that constitute the complete pressure-fed bearing is 1/2. The journal angular speed
is 3000 rev/min, or 50 rev/s, and the radial steady load is 900 lbf. The external sump is
maintained at 120°F as long as the necessary heat transfer does not exceed 800 Btu/h.
(a) Find the steady-state average film temperature.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd38011bb-82aa-493d-bf28-1434e71b7a05%2F30aeb1e0-45bc-41cd-96b7-450d1a05f9e2%2Ft1mn4cn_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A circumferential-groove pressure-fed bearing is lubricated with SAE grade 20 oil sup-
plied at a gauge pressure of 30 psi. The journal diameter d; is 1.750 in, with a unilateral
tolerance of -0.002 in. The central circumferential bushing has a diameter d of
1.753 in, with a unilateral tolerance of +0.004 in. The l' /d ratio of the two “half-bearings"
that constitute the complete pressure-fed bearing is 1/2. The journal angular speed
is 3000 rev/min, or 50 rev/s, and the radial steady load is 900 lbf. The external sump is
maintained at 120°F as long as the necessary heat transfer does not exceed 800 Btu/h.
(a) Find the steady-state average film temperature.
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