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Catalogue Shock Absorber Catalog

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Jarret Shock absorbents

BC5 Series

Application Worksheet

4 - Calculation of Effective Reaction Rdy_e

_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

a 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

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)

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.

+1,36 - 1,17

Ce = C

En (0,03 V + 0,24)

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