EBK 3I-EBK: WELDING PRINCIPLES & APPLIC
8th Edition
ISBN: 9780176919764
Author: Jeffus
Publisher: VST
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Textbook Question
Chapter 8, Problem 15R
Define standoff distance.
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4.
(a) State the conditions that must be met to ensure dynamic balance is achieved for long rotors.
(b) A rotor carries three out-of-balance discs in planes A, B and C as shown in Figure 4. The out-of-
balance mass x radius products of the rotor discs are tabulated in Table 4.
The shaft is to be dynamically balanced by adding balancing masses in planes P and Q, spaced along
the shaft at a distance da = 800 mm.
Determine the magnitude mara and angular position of the balancing mass x radius product that
must be added to plane Q.
MBB
Ов
θε
mdc
Мага
End View on Plane P
P
MBB
MATA
dA
dB
dc
do
Figure 4
moc
Table 4
MATA = 0.6 kg mm
6A = 0°
d₁ = 200 mm
mers = 0.2 kg mm
6g = 45°
dB = 400 mm
mcrc = 0.4 kg mm
Bc=240°
dc = 600 mm
Ans. (b) = 110.5°, moro = 0.2 kg mm
Need help in adding demensioning am am so confused
Complete the following activity. Save as .pdf and upload to the assignment to the dropbox.
口
Use the general dimensioning symbols to correctly specify the following requirements on the
drawing above.
Chapter 8 Solutions
EBK 3I-EBK: WELDING PRINCIPLES & APPLIC
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