Shock Absorber Catalog (I & M) - ITT Enidine Inc. - #101

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Jarret Shock Absorbers
BC5 Series
Application Worksheet
4 - Calculation of Effective Reaction Rdye
Rdye = |( Kaymax - Kayw j x Ce + Rdy0 | (01V + 08)
BC5A — BC5E Series Based On
□ Impact velocity : 2 m/s
□ Operating temperature : - 20° to + 40°C
□ Surface protection : Electrolytic zinc
□ Dynamic performance diagram
Force kN
Rdymax
5 - Application Example
Data: Two shock absorbers in series, Effective mass m =300 t, Impact speed v = 1,2 m/s (which is an impact of 0,6 m/s on each shock absorber), Impact frequency = 15 impacts/hour, Maximum allowable structural load 1000 kN
1: E = ^!-( -UmV2) - Selection BC5-E
22
Rdy0
150
2: Maximum allowable impact frequency is 15 x -
21 impacts/hour. Therefore 15 impacts/hour is acceptable.
> Stroke mm
Symbols:
En = Energy Capacity C = Maximum Stroke Rdy = Dynamic Reaction
1 - Energy Calculation
3: Required stroke is 167 mm
108
Ce = 180 x
+ 1,36 - 1,17]= 156 mm
150 (0,03 x 0.6 + 0,24)
2
MeVe2
4: Rdye =
( 0,1x 0,6 + 0,8)
2 - Allowable Impact Frequency
En E
Impacts/hour
F < 15 x
= 893 kN < 1000 kN, maximum allowable impact frequency
3 - Effective Stroke Calculation
Compare with standard mechanical characteristics for each shock absorber:
En = 150 kJ, C = 180 mm, Rdy0 = 640 kN and Rdymax = 1100 kN
All performance characteristics can be modified. Please advise us of your specific requirements.
E
+1,36 - 1,17
Ce = C
En (0,03 V + 0,24)
www.enidine.com
Email: industrialsales@enidine.com
Tel.: 1-800-852-8508 ext. 111
Fax: 1-716-662-0406
98

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