Jarret-2005-A4-metric 11/7/05 11:06 AM Page 2

www.jarret.fr Email: [email protected] Tel. +33 1 41 32 26 60 Fax +33 1 40 86 12 82

Table

of C

ontents

Table of Contents

Company Overview.................................................1

Visco-elastic Technology............................................2

Applications ............................................................3-4

Shock AbsorbersSizing Information....................................................5-6

Shock Absorber Technical Data .................................7-13

Springs .................................................................14

Special Technologies............................................15

Enidine Product Overview.........................................16-17

Website Information .................................................18

Notes .....................................................................19

Contents

Shock Absorbers

Springs

Jarret SAS14-38, rue Alexandre, Bat. E2BP-35F-92234 Gennevilliers cedexFranceTel.: +33 1 41 32 26 60Fax: +33 1 40 86 12 82e-mail: [email protected]

Enidine GmbHRheinauenstraße 579415 Bad BellingenGermanyTel.: +49 (0) 7635 8101 0Fax: +49 (0) 7635 8101 99e-mail: [email protected]

Jarret Incorporated7 Centre DriveOrchard Park, NY 14127United StatesTel.: +1 716 740 5121Fax: +1 716 662 0406e-mail: [email protected]

Locations Worldwide


Jarret SAS is located in Gennevilliers, a northwestern suburb of Paris, France.The manufacturing operations are conducted

globally in locations which include, France,Germany, the United States and China.

In May 2005 Jarret SAS joined the Enidinegroup of companies, expanding the internationalpresence and service capabilities for Jarret product lines.

1 www.jarret.fr Email: [email protected] Tel. +33 1 41 32 26 60 Fax +33 1 40 86 12 82

Com

pany O

vervie

wCompany Overview

Founded in 1964, the Jarret companyspecialises in the design and manufactureof energy absorption products. A common

feature of these highly technical products is the use of visco-elastic elastomeric fluids, a technology that is under continuous developmentand that has been successfully applied for morethan forty years.

J arret SAS is included within the quality systemof the global Enidine group of companies. Enidine has maintained ISO9001 certification

since 1997 and also holds AS9100 and variousindustry specific certifications in multiple facilities.

Extract from our 1964’s brochure


2www.jarret.fr Email: [email protected] Tel. +33 1 41 32 26 60 Fax +33 1 40 86 12 82

Vis

co-e

lastic

Technolo

gy

Visco-elastic Technology

Visco-elastic technology makes use of the fundamental properties of specially formulated Jarret visco-elastic fluids.

Compressibility: Preloaded spring function

- F = F0 + KX

Viscosity: Shock absorber function- F = F0 + KX + CV α with α

between 0,1 and 0,4

The two functions can be used separately or in combination, in the same product:

Preloaded Spring: Spring Function Only• Hysteresis of between 5% and 10%• Reduced weight and space

requirement• Force/stroke characteristic is

independent of actuation speed• Reset time between 1/100 sec

and 1/10 sec

Shock Absorber Without Spring Return: Shock Absorbing Function Only• Dampening devices• Blocking Devices

Preloaded Spring Shock Absorbers: Combine Spring and Shock Absorber Functions• Dissipate between 30% and 100% of energy• Force/stroke characteristics remain unchanged

between -10°C and + 70°C


Railways Used as energy-dissipation devices installed inside automatic couplers and inside draw bars to provide crash protection to rolling stock andenhance passagers safety.

Materials Handling Equipment Long stroke shock absorbers for end-of-travel impact protection.

Special Machinery Coil-stop shock absorbers

Tramways Front-mounted shock absorbers to provide protection from frontal and rear impacts caused by vehicle-to-vehicle collisions.


Applicatio

ns

Applications

x

x

xDefense Shock absorbing end-stops for military tank suspension-member over-travel.

Space ExplorationRetractable cryogenic support-arm. Shock absorbing end stops.

Industrial

Rail

Aerospace and Defense



Applic

atio

ns

Applications

High Speed RailFixed and sliding end-of-track stops.

Steel Mills Rolling mill chock separators for automatic, rapid roll changing.

Lock GatesProtection of lock gates from ship and barge impacts.

MarineShock protection of sensitive equipment being transferred from one vessel to another vessel or to a stationary platform.


Horizontal Movement: Moving Load

Horizontal Movement: Load Against Solid StopHorizontal Movement: Load Against Load

Free Moving Load Down an Inclined Plane

Horizontal Movement: Load Against Solid Stop(with Drive Force)

Horizontal Movement: Load Against Load withShock Absorbers

EK = V2

ET = EK

ETC = ET x C

C = Cycles/Hour

EK = 9,8 x W x H FD = 9,8 x W x Sin αEW = FD x SET = EK + EW

ETC = ET x C

V = 19,6 x H

C = Cycles/Hour

EK = x V2

EW = FD x S ET = EK x EW

We = 2 x ET

VD2

ET = EK = 0.25 x W x V2

V =

We = 2 x W

V2

ET = EK = x (V1 + V2)212

W1 x W2

W1 + W2

VD = V1 + V2

We =W1 x W2

W1 + W2

ET = EK = x (V1 + V2)214

W1 x W2

W1 + W2

V =

W0 = 2 x W1 x W2

W1 + W2

V1 + V2

2

5

Sizin

g E

xam

ple

sShock Absorbers

W2

W 2

S

FD

VD

V

W

W

WW1 W2

W1 W2 W

S

www.jarret.fr Email: [email protected] Tel. +33 1 41 32 26 60 Fax +33 1 40 86 12 82



Sizin

g E

xam

ple

sShock Absorbers

V2

Rotation Application: -Horizontal Rotation-Table (with Torque)

Rotation Application: Vertical RotaryLoad (with Torque) Opposing Gravity

Vertical Movement: Free Falling Load

Rotation Application: Vertical RotaryLoad, Aided by Gravity

ω = RPM x 0,1047

I = W x K

KTABLE = TABLE RADIUS x 0,707

ITABLE = W x K2 TABLE

ILOAD = W x K2 LOAD

EK =

FD =

EW = FD x S

ET = EK x EW

V D= RS x ω

EK = 9,8 x W x H EW = 9,8 x W x SET = EK + EW

ETC = ET + C

V = 19,6 x H

I = W x K2

EK =

FD =

EW = FD x S

ET = EK x EW

VD = RS x ω

ET Total Energy Nm

EK Kinetic Energy Nm

Ew Work Energy Nm

W Mass kg

We Effective Mass kg

VD Impact Velocity m/s

V Velocity m/s

FD Propelling Force / Drive Force N

a Acceleration m/s2

S Stroke m

H Height m

ω Angular Velocity rad/s

I Mass Moment of Inertia kgm2

T Torque Nm

Rs Mounting Distance from Pivot Point m

K Radius of Gyration m

Symbols and Definitions Table

(ITABLE + ILOAD ) x ω2

2TRS

RS

W1

S

T W

α

I x ω2

2T – (9,8 x W x K x Sin ø)

RS

I = W x K2

EK =

FD =

EW = FD x S

ET = EK x EW

VD = RS x ω

I x ω2

2T + (9,8 x W x K x Sin ø)

RSRS

S

K

VD

V

T

WS

h

ø

H

S

W



Technic

al In

form

atio

nShock Absorbers

L1 L2 L3 L4 L5 L6 R1 D1 D2 D3 D4 D5 D6 D7 Massmm mm mm mm mm mm mm mm mm mm mm mm mm mm kg

BC1ZN 75 53 52 10 7 43 - ø19 M25 x 1,5 ø20 ø38 ø57 ø41 ø7 0,3

BC1BN 120 98 96 12 8 86 - ø25 M35 x 1,5 ø32 ø52 ø80 ø60 ø9 0,7

BC1BN-M 120 98 96 12 9 - - ø25 M40 x 1,5 ø32 ø58 - - - 0,8

BC1DN 175 140 138 12 11 128 - ø38 M50 x 1,5 ø45 ø70 ø90 ø70 ø9 1,9

BC1DN 175 140 138 12 11 128 - ø38 M50 x 1,5 ø45 ø70 ø106 ø85 ø11 2

BC1DN-M 175 140 138 12 11 - - ø38 M60 x 2 ø45 ø70 - - - 2

BC1EN 213 168 158 10 13 158 R.130 ø60 M75 x 2 ø72 ø98 ø122 ø100 ø11 5

BC1FN 270 210 130 12 16 130 R.150 ø74,5 M90 x 2 ø90 ø120 ø150 ø120 ø13 10,5

BC1GN 337 257 145 14 19 145 R.350 ø90 M110 x 2 ø110 ø145 ø175 ø143 18 17

The design of JARRET Industrial Shock Absorber utilises the unique compression and shear characteristics ofspecially formulated silicone elastomers.

These characteristics allow the energy absorption and returnspring functions to be combined into a single unit without theneed for an additional gas or mechanical spring strokereturn mechanism.

Advantages:- Simple design - High reliability- High damping coefficient- Low sensitivity to temperature variances

BC1N Series

ApplicationsShock protection for all types of industry including:defense, automobile, railroad, materials handling, marine, pulp/paper, metal producing and processing

Rear flange mounting - Fa Threaded body mounting - Fc

Dimensions


4,8En (0,03 * 0.8 + 0,24)


Technic

al In

form

atio

nShock Absorbers

1 - Selection Chart

2 - Standard Mechanical Characteristics

Based On� Impact velocity : 2 m/s� Operating temperature : - 20° to + 40°C� Surface protection : Electrolytic zinc� Dynamic performance diagram

Symbols:En = Energy CapacityS = Maximum StrokeRdy = Dynamic Reaction

3 - Energy Calculation

EK = We VD2

4 - Allowable Impact Velocity

F < 20 x Impacts/hour

5 - Effective Stroke Calculation

Ce = S +1,36 - 1,17

BC1N Series

En Stroke Rdy0 RdymaxMODEL kJ mm kN kN

BC1ZN 0,1 12 6 11BC1BN 0,43 22 14 27BC1DN 1,5 35 28 60BC1EN 3,4 45 45 100BC1FN 7 60 90 150BC1GN 14 80 130 230

EnE

Rdymax - Rdy0S

EEn (0,03 V + 0,24)

All performance characteristics can be modified. Please advise us of your specific requirements.

12

Rdy0

Rdymax

6 - Calculation of Effective Reaction Rdye

Rdye = x Ce + Rdy0 (0,1V + 0,8)

7 - Application ExampleGiven data: Effective mass = 15 t, Effective speed = 0,8 m/s Impact frequency: 25 impacts/hour

A: BC1FN Selected

B: Mechanical Characteristics are: En = 7 kJ, S = 60mm, Rdy0 = 90 kN and Rdymax = 150 kN

C: Energy dissipated per impact is: 4,8 kJ

D: Allowable impact frequency < 20*7/4.8

E: Required stroke is 49 mm

Ce = 60 +1,36 - 1,17

F: With an Rdye = [(150 - 90) * 49/60) + 90)] * (0,1 x

0,8 + 0,8) = 122 kN



Technic

al In

form

atio

nShock Absorbers

L1 L2 L3 L4 L5 L6 L7 L8 D1 D2 D3 D4 D5 Massmm mm mm mm mm mm mm mm mm mm mm mm mm kg

BC5A 415 275 140 20 30 15 135 105 116 116 87 120 14 25

BC5B 500 325 175 25 33 30 155 125 142 142 115 138 14 40

BC5C 520 315 205 30 36 35 175 140 160 132 158 158 18 45

BC5D 585 350 235 35 40 40 215 170 180 180 153 185 22 73

BC5E 670 405 265 40 45 45 250 195 215 215 182 220 26 117

The design of JARRET Industrial Shock Absorber utilises the unique compression and shear characteristics ofspecially formulated silicone elastomers.

These characteristics allow the energy absorption and returnspring functions to be combined into a single unit without theneed for an additional gas or mechanical spring strokereturn mechanism.

Advantages:- Simple design - High reliability- High damping coefficient- Low sensitivity to temperature variances

BC5 Series

ApplicationsShock protection for all types of industry including:defense, automobile, railroad, materials handling, marine, pulp/paper, metal producing and processing

BC5 Series

Dimensions

Impact Speed: BC5 Series shock absorbers are designed for impact velocities of up to 4 m/sec. Higher impact velocities require custom modification.

Rear Flange Mount - Fa

Front Flange Mount - Fc



Technic

al In

form

atio

nShock Absorbers

108150 (0,03 * 0.6 + 0,24)

BC5 Series

En Stroke Rdy0 RdymaxMODEL kJ mm kN kN

BC5A 25 105 167 310BC5B 50 120 310 540BC5C 75 140 400 700BC5D 100 160 470 820BC5E 150 180 640 1 100

EnE

Rdymax - Rdy0S

EEn (0,03 V + 0,24)

12

12

12

150108

(1 100 - 640) x + 640156180


Rdy0

Rdymax


Rdye = x Ce + Rdy0 (0,1V + 0,8)

6 - Application ExampleData: 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 = 15impacts/hour, Maximum allowable structural load 1000 kN

A: E = ( mV2) - Selection BC5-E

B: Mechanical characteristics for each shock absorber are: En = 150 kJ, S = 180 mm, Rdy0 = 640 kN and Rdymax = 1100 kN

C: Maximum allowable impact frequency is 15 x 21 impacts/hour. Therefore 15 impacts/hour is acceptable.

D: Required stroke is 167 mm

Ce = 180 x +1,36 - 1,17 = 156 mm

E: Rdye = ( 0,1x 0,6 + 0,8 )

= 893 kN < 1000 kN, maximum allowable impact frequency

1 - Standard Mechanical Characteristics

Based On� Impact velocity : 2 m/s� Operating temperature : - 20° to + 40°C� Surface protection : Electrolytic zinc� Dynamic performance diagram



EK = We VD2



4 - Effective Stroke Calculation

Ce = S +1,36 - 1,17



Technic

al In

form

atio

nShock Absorbers


XLR6-150 410 231 179 19 0 10 Ø90 Ø70 50 Ø90 38 50 9 4,2

XLR12-150 480 285 195 18 15 12 110 85 75 90 57 80 11 11XLR12-200 530 285 245 18 15 12 110 85 75 90 57 80 11 11XLR25-200 620 370 250 20 18 12 135 105 90 110 72 100 14 20XLR25-270 690 370 320 20 18 12 135 105 90 110 72 100 14 25XLR50-275 855 520 335 25 20 15 175 140 110 150 87 120 18 40XLR50-400 980 520 460 25 20 15 175 140 110 150 87 120 18 40XLR100-400 1370 910 460 25 20 15 175 140 110 150 87 120 18 65XLR100-600 1570 910 660 25 20 15 175 140 110 150 87 120 18 65XLR150-800 2640 1780 860 25 20 15 175 140 110 150 87 120 18 115

The design of JARRET Industrial Shock Absorberutilises the unique compression and shear characteristics ofspecially formulated silicone elastomers.

These characteristics allow the energy absorptionand return spring functions to be combined into asingle unit without the need for an additional gasor mechanical spring stroke return mechanism.

LR Series

Dimensions

Rear Flange Mounting - Fa on Request.

XLR Series - Front Flange Mount- Fc BCLR Series - Front Flange Mount - Fc


BCLR-100 1120 660 460 25 20 15 175 140 130 150 110 140 18 63

BCLR-150 1350 775 575 30 25 20 215 170 140 185 120 150 22 90BCLR-220S 1285 783 475 30 25 20 215 170 140 185 120 150 22 100BCLR-250 1750 1025 725 30 25 20 215 170 155 185 135 170 22 135BCLR-400 2185 1250 935 35 25 25 265 210 175 235 150 190 27 218BCLR-600 2555 1420 1135 35 25 25 265 210 200 235 175 215 27 295BCLR-800 2935 1630 1305 40 35 30 300 240 220 270 190 235 30 420BCLR-1000 3225 1820 1405 40 35 30 300 240 230 270 205 248 30 470



Technic

al In

form

atio

nShock Absorbers

274400 (0,027 * 2.7 + 0,22)

1 - Standard Performance Specifications

Based On� Impact velocity : 2 m/s� Operating temperature : - 20° to + 40°C� Surface protection : Electrolytic zinc & Painting� Dynamic performance diagram



EK = We VD2



4 - Required Stroke Calculation

Ce = S +1,83 - 1,35

LR Series

En Stroke Rdy0 RdymaxType XLR kJ mm kN kN

XLR6-150 6 150 25 50XLR12-150 12 150 66 100XLR12-200 12 200 42 78XLR25-200 25 200 95 150XLR25-270 25 270 66 112XLR50-275 50 275 118 230XLR50-400 50 400 75 150XLR100-400 100 400 175 320XLR100-600 100 600 85 230XLR150-800 150 800 80 250

EnE

Rdymax - Rdy0S

EEn (0,027 V + 0,22)

12

En Stroke Rdy0 RdymaxType BCLR kJ mm kN kN

BCLR-100 100 400 190 310BCLR-150 150 500 200 380BCLR-220S 220 400 380 685BCLR-250 250 650 270 490BCLR-400 400 850 330 600BCLR-600 600 1050 370 740BCLR-800 800 1200 430 860BCLR-1000 1000 1300 500 1000

Impact Speed: Types XLR and BCLR Series shock absorbers are designed for impact velocities of up to 2 m/sec. Higher impact velocities require custom modification.



Rdye = x Ce + Rdy0 (0,1V + 0,8)

6 - Application ExampleData: Effective mass = 75 t

Effective impact speed = 2,7 m/sMaximum allowable structural force: 650 kN

A: BCLR400 selected

B: Performance characteristics are: En = 400 kJ, S = 850 mm,Rdymax = 600 kNRdy0 = 330 kN

C: Energy dissipated/impact is 274 kJ

D: Maximum allowable impact frequency 8 x 400 / 274 = 12 (10 impacts/hour is acceptable)

E: Effective stroke:

Ce = 850 x + 1,83- 1,35

Ce = 587mm

F: Rdye = 520 (0,1 x 2,7 + 0,8) = 556 kN

(which is less than maximum allowable reaction force of 650 kN)



Shock A

bsorbers

Shock AbsorbersLR Series

End of track stops by JARRET are shock absorbers which can be fitted on to a steel or concrete fixed structure accordingto the customer's specifications. The JARRET LR series is suited particularly well for such applications, and customdesigns are also available to meet customer specific needs. Fixed track stops are generally used for impact speeds up to 10/15 km/h. Buffer selection is a function of the energy to be absorbed and of the maximum impact force allowedby the train structure. For higher impact speeds, the stopping distance of the train is critical, and the use of a sliding track stop is then necessary for adequate safe deceleration. In this application the energy is absorbed and dissipated by the friction between the brake shoes and the rails.

The addition of several buffers to a standard sliding track stop adds the following advantages:

• At the moment of impact, the energy needed to initiate movement of the sliding track stop is smoothly controlled. The buffer allows the train to avoid a high peak speed which could damage the train structure.

• In the case of slower impacts, only the JARRET unit absorbs the energy and the sliding does not need to be reset.

In addition to the buffer, a specific impact plate has been designed to ensure that the track stop will match correctly withthe train impact zone.

Example of a fixed track stop for trains using a central coupling and side buffers

Example of a sliding track stop for trains using a central coupling


Reservoir

Advantages:

1 - Extremely compact.

2 - Dependable retention of initial characteristics, even after years of non-use.

3 - Easy installation.

4 - No maintenance.

5 - No adjustment necessary in service.

6 - Elimination of any additional devices for pre-loading because the silicone has been pre-stressed during initial charging.

7 - Appreciable service life: in normal operating conditions it may reach 5 to 10 years.

Silicone

Seals

Guide Ring

Stationary Piston

F

The load “F” forces the reservoir over the stationary piston. The silicone is compressed by the volume displacement of the stationary piston.

Main Application: JARRET Springs for Work Roll Chock Separation in Mills


Sprin

gs

SpringsSprings

JARRET devices are designed and built on the principle of the compression, shear characteristics of specially formulated silicone compounds (JARRET patents).

These characteristics enable the JARRET device to be designed as an energy storing device (a spring) or an energy dissipating device (a shock absorber) or a combination of both.

By modifying the geometry of the unit and selectingan appropriate silicone compound the emphasis canbe placed either on the energy storing function or onthe energy dissipating function.

Operating Conditions of JARRET Springs


Special Technologies

Material Removal• Custom-designed mechanical fuses• Can be used in tension or compression• Force characteristic can be made variable with stroke

Plastic Deformation• Safety mechanical fuses with permanent deformation• Reaction force is independent of impact speed• No energy recovery

Friction Generating Products• Constant friction force independent of surface speed• Characteristic are unchanged from –200°C to +200°C• Friction force can be independently regulated in

both tension and compression


Specia

l Technolo

gie

sSpecial Technologies


Industrial

Since 1966, Enidine has achieved a worldwide reputation forquality engineering solutions, and offers the world’s most comprehensive range of standard and custom energy absorption and vibration isolation products.

Capabilities: ❍❍ System Analysis & Design❍❍ Finite Element❍❍ 3-D Modeling❍❍ In-house Test Facility❍❍ ISO 9001 Certified

Products:❍❍ Hydraulic Shock Absorbers❍❍ Rate Controls ❍❍ Air Springs❍❍ Wire Rope Isolators ❍❍ Heavy Industry Buffers❍❍ Emergency Stops

Markets:❍❍ Packaging❍❍ Material Handling❍❍ Semi-conductor❍❍ Wood, Paper & Pulp ❍❍ Automotive❍❍ Medical

Rail

Since 1919, Vibratech the rail division of Enidine has been an industry leader in motion control, energy absorption and vibration isolation.

Products: ❍❍ Rotary Shock Absorbers❍❍ Friction Snubbers❍❍ Telescopic Shock Absorbers❍❍ Hydraulic Timing Devices ❍❍ Air Springs❍❍ Elastomers❍❍ Wire Rope Isolators

Markets:❍❍ Passenger Rail❍❍ High-Speed Rail❍❍ Locomotive ❍❍ Freight Rail❍❍ Track❍❍ Maintenance of Way Equipment❍❍ Signaling


Enid

ine O

vervie

wEnidine Overview


Aviation

The Enidine Aviation Group develops engineered motion control devices for passenger aircraft systems and equipment. These include hydraulic, elastomeric and electronically controlled Stowage Bins and Aircraft Seating.

Products: ❍❍ Energy Absorbers ❍❍ Rate Controls❍❍ Elastomeric Mounts❍❍ Aircraft Seat Recline Systems ❍❍ Wire Rope Isolators❍❍ Recoil Buffers❍❍ Electromechanical Actuators❍❍ Semi-active Isolation Systems

Defense

Today’s warfighter depends on weapons systems and

equipment that is more sophisticated than ever before.

The rapid insertion of technology, combined with lightweight

materials and commercial off the shelf components, requires

shock and vibration isolation, and precision motion control.

On land sea and air Enidine serves the defense market with

engineered solutions as precise and reliable as the systems

they protect.

Products: ❍❍ Hydraulic & Mechanical Shock Absorbers ❍❍ Custom Elastomeric Isolators❍❍ Standard and Custom Wire Rope Isolators❍❍ Dampers❍❍ Time Delays❍❍ Rate Controls


Enid

ine O

vervie

wEnidine Overview



World

Wid

e W

eb

World Wide Web

www.enidine-europe.com

www.jarret.fr

Find all of the latest literature, news events and product offerings available on the internetthrough www.enidine-europe.com or www.jarret.fr


19 Email: [email protected] Tel. +33 1 41 32 26 60 Fax +33 1 40 86 12 82

Notes

Notes


Jarret SAS14-38, rue Alexandre, Bat. E2BP-35F-92234 Gennevilliers cedexFranceTel.: +33 1 41 32 26 60Fax: +33 1 40 86 12 82e-mail: [email protected]

Enidine GmbHRheinauenstraße 579415 Bad BellingenGermanyTel.: +49 (0) 7635 8101 0Fax: +49 (0) 7635 8101 99e-mail: [email protected]

Jarret Incorporated7 Centre DriveOrchard Park, NY 14127United StatesTel.: +1 716 740 5121Fax: +1 716 662 0406e-mail: [email protected]

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