Wire Rope Catalog - ITT Enidine Inc. - #39

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Text version of the page
Compact Wire Rope Isolators
CR Series
Application Worksheet
APPLICATION WORKSHEET - INPUTS IMPERIAL/METRIC
IMPERIAL
METRIC
PART I: SYSTEM DATA:
1. Total Supported Load ( Wt):
Wt= _lbs.
Wt=_ Kg x 9.81
n =
N
2. Number of Isolators (n):
3. Static Load per Isolator (W):
* Assumes a central CG
4. Load Axis: Compression
Shear or Roll
45° Compression/Roll
Wl
W =_lbs.*
Load Axis
W =_N*
Load Axis
w
n
PART II: VIBRATION SIZING:
1. Input Excitation Frequency
(/) =_Hz ( = JEL)
System Response Natural Frequency for 80% isolation: Maximum Isolator Vibration Stiffness: (Ky)
Kv= W (2n /n)2
lbs./in.
N/m
g
g = 386 in/sec2 or 9.81 m/sec2
Select an isolator by comparing calculated values with technical data for the desired load axis provided in tables for each isolator. a.) Calculated "W" must be less than the isolator's max static load and
b.) Isolator's vibration stiffness must be less than the calculated maximum Kv
4.
III: SHOCK SIZING:
AT = _G's
1.
maximum Allowable Shock Input Velocity:
Transmitted Acceleration:
in./sec. m/sec.
V =
V =
2.
V
g = 386 in./sec.2 or 9.81 m/sec.2 h = Drop Height (in. or m)
Free Fall Impact:
V
Dmin =_in.
Dmin =_m
Dmin :
3. Min. Isolator Response Deflection:
g(AT)
W(V/Dmin)2
Ks =_lbs./in.
Ks =_N/m
Maximum Isolator Shock Stiffness:
4.
Ks
g
Select an isolator by comparing calculated values with technical data for the desired load axis provided in tables for each isolator. a.) Calculated "W" must be less than the isolator's max static load and
b.) Calculated Dmin must be less than the isolator's max deflection
Note: Metric deflections are calculated in meters (m) and technical data is in millimeters (mm). and
c.) Isolator's shock stiffness must be less than calculated maximum "Ks"
V
5.
Check actual deflection using "Ks" from technical data / K (ISOlator)g
to ensure that the isolator's max deflection is Dactua| = y
6.
Dactual =-in.
Dactual =-m
W
not exceeded.
If isolator's max deflection is exceeded, select another isolator and repeat steps 5 and 6.
7.
www.enidine.com
Tel.: 1-800-852-8508 Solutions in Energy Absorption and Vibration Isolation

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