Question

3. A 100 mm long and 60 mm diameter journal bearing supports a load of 2500 N at 600 r.p.m. If the room temperature is 20°C, what should be the viscosity of oil to limit the bearing surface temperature to 60°C? The diametral clearance is 0.06 mm and the energy dissipation coefficient based on projected area of bearing is 210 W/m2/°C.

Answer 1

Answer:

mm" (and any subsequent words) was ignored because we limit queries to 32 words.

Answer 2

Answer:

0.0183

Step-by-step explanation:

Length=100mm   Breadth=60mm

P=2500N           N=600 rpm

Room temperature T =20°C       Surface Temperature Ts = 60°C

Diametrical clearance (cd)= 0.06mm        

Energy dissipation coefficient h=210W/m²

Now, viscosity of oil:  33/108 (Zn/p)*(d/Cd)+k

L/d=100/60=1.666

If l/d(0.75-2.8), we tale the value of k is 0.002

Heat generation:

Hg=uvw

Na(ΔT)=uvw

Na(Ts-T∞)=uvw

v=πdn/60

V-1.884m/s

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