Fundamental Calculations for Designing Industrial Shock Absorbers
Major Parameters
= W [kg]
= vD [m/s]
= F [N]
= c [/hr]
= n
-
Mass to be decelerated (weight)
-
Impact velocity at shock absorber
-
Propelling force
-
Cycles per hour
-
Number of absorbers in parallel
Symbols Used
E1
E2
E3
E4
We
W
n
ω
F
D
DR
c
p
Pm
v
K
RS
VS
RL
Nm
Nm
Nm
Nm/hr
Kg
Kg
rad/s
N
m
m
1/hr
Pa
kW
m/s
m
m
m/s
m
Kinetic energy per cycle
Propelling force energy per cycle
Total energy per cycle (E1 + W2)
Total energy per hour (E3*c)
Effective weight
Mass to be decelerated
Number of shock absorbers (in parallel)
Angular velocity at impact
Propelling force
Cyclic Diameter of Cylinders
Rod Diameter
Cycles per hour
Pressure
Motor power
Velocity at impact
Distance to C.G. from Pivot
Shock Absorber Mounting Radius
Velocity at RS
Radius of Additional Load
WL
RT
VT
Le
vD
T
I
g
h
s
L/R/r
Q
µ
t
d
α
a
ST
kg
m
m/s
m
m/s
Nm
kgm²
m/s²
m
m
m
N
s
m/s²
°deg
°deg
1 to 3
Additional Load
Table Radius
Velocity at RT
Length
Impact velocity at shock absorber
Propelling torque
Moment of Inertia
Acceleration due to gravity = 9.81
Drop height (excl. shock stroke)
Shock absorber stroke
Radius
Reaction force
Coefficient of friction
Deceleration time
Deceleration
Side load angle
Angle of incline
Stall torque factor (normally 2.5)
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