Question

A bearing uses SAE 30 oil with a viscosity of 0.1 N·s/m^2. The bearing is 30 mm in diameter, and the gap between the shaft and the casing is 2.0 mm. The bearing has a length of 3 cm. The shaft turns at ω = 350 rad/s. Assuming that the flow between the shaft and the casing is a Couette flow, find the torque required to turn the bearing.

Name: a bearing uses sae 30 oil with a viscosity of 01 nsm2 the bearing is 30 mm in diameter and the gap between the shaft and the casing is 20 mm the bearing has a length of 3 cm the shaft turns 21864
Uploaded: 2023-09-14T21:12:07-08:00
Duration: 2 min 38 s
Channel: Adi S
Description: a bearing uses sae 30 oil with a viscosity of 01 nsm2 the bearing is 30 mm in diameter and the gap between the shaft and the casing is 20 mm the bearing has a length of 3 cm the shaft turns 21864

          A bearing uses SAE 30 oil with a viscosity of 0.1 N·s/m^2. The bearing is 30 mm in diameter, and the gap between the shaft and the casing is 2.0 mm. The bearing has a length of 3 cm. The shaft turns at ω = 350 rad/s. Assuming that the flow between the shaft and the casing is a Couette flow, find the torque required to turn the bearing.

Added by Jose Francisco W.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Adi S

09/14/2023

Step 1

We know that the shaft turns at ω = 350 rad/s, and the diameter of the bearing is 30 mm. Therefore, the velocity of the oil can be calculated as: V = ωr = 350 x 0.015 = 5.25 m/s Substituting the values, we get: γ = 2 x 5.25/0.002 = 26,250 s^-1 Show more…

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A bearing uses SAE 30 oil with a viscosity of 0.1 N·s/m^2. The bearing is 30 mm in diameter, and the gap between the shaft and the casing is 2.0 mm. The bearing has a length of 3 cm. The shaft turns at ω = 350 rad/s. Assuming that the flow between the shaft and the casing is a Couette flow, find the torque required to turn the bearing.