تم الحل ✓
categoryهندسة ميكانيكية
schoolبكالوريوس
event_available2026-07-14
السؤال
Transcribed Image Text:
A solid shaft ABCDE is supported by bearings at A and D, and rotates at 800 RPM. A power P
(kW) is delivered to the shaft through the dc diameter belt pulley at C. 40% of the power is
extracted via the dB diameter pulley at B, while the rest is extracted at the dд diameter pulley at
E. At pulleys B and E, the two belt strands are parallel and at pulley C the total contact angle of
the belt is 200 degrees. The ratio of tensions in them is R.
B
Info
Power(kW)
15
AB(mm)
150
BC(mm)
80
CD(mm)
120
DE(mm)
50
dC (mm)
300
dB (mm)
240
dE (mm)
180
R
8:1
B
45
C
E
D
Torque at
TC= 179.05 N*m
TD=71.62 N*m
TE=107.43 N*m
1. Need FBD for XZ plane
2. Shear diagram XZ plane
3. Moment diagram XZ plane
Power input is at point C:
60 15000 Watts
T₂ =
2 800 rpm
T
=
179.05 Nm
Point B extracts 40% of power:
TB T 0.40 = 179.05 N m 0.4
=
*
TB
71.62 N* m
Point E extracts 60% if power:
TE=TC 0.60
= 179.05 N m 0.6
*
TE
107.43 N m
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