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WIRE ROPE SPRINGS AND ISOLATORS Eidos Engineering A new technology for noise and vibration control
| Date post: | 30-May-2015 |
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WIRE ROPE SPRINGS AND ISOLATORS
Eidos Engineering
A new technology for noise and vibration control
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Table of contents
The company .............................................................................................................................................................. 2
An advanced methodology ......................................................................................................................................... 3
Wire rope springs applications ................................................................................................................................... 4
Wire rope springs overview ........................................................................................................................................ 5
Description ............................................................................................................................................................. 5
Main characteristics ............................................................................................................................................... 5
Materials and finishes ................................................................................................................................................ 6
Options ....................................................................................................................................................................... 6
Mounting ............................................................................................................................................................ 6
Loops................................................................................................................................................................... 6
Performance ............................................................................................................................................................... 6
Stiffness .............................................................................................................................................................. 6
Damping.............................................................................................................................................................. 8
Mounting Orientation ................................................................................................................................................ 8
Technical data EWR-4 ................................................................................................................................................. 9
Technical data EWR-8 ...............................................................................................................................................10
Technical data EWR-10 .............................................................................................................................................10
Technical data EWR-15 .............................................................................................................................................11
Technical data EWR-20 .............................................................................................................................................13
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The company
Eidos Engineering is leader in dynamics of machinery, mechanical vibrations and acoustics. This the reason because Eidos Engineering offers a range of wire rope springs and isolators, each designed to reduce the harmful effects of shock and vibration. Furthermore, Eidos Engineering is one of the leading companies in
design and production of Tuned Mass Dampers (vibration absorbers) for industrial and structural applications. Eidos Engineering is a leading manufacturer of highly engineered components and customized technical solutions. Building on its heritage of innovation, Eidos Engineering partners with its customers to deliver innovative solutions to the key industries that underpin our modern way of life. Eidos Engineering is ready to answer your questions, feel free to contact us at: Phone: +39 0434 507547 Fax: +39 0434 507546 Email: [email protected] Online: www.eidosengineering.com
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An advanced methodology
The correct approach to a new technical problem is the perfect combination of actions and time. It’s the winning strategy.
Throughout the knowledge of theory and practice, and following an experienced work-flow, Eidos Engineering finds out the right way to satisfy customer’s needs.
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Wire rope springs applications • Pump, generator and compressor isolation
• Shipping cases and containers
• Chemical processing plants
• Chimneys, scrubbers and vessels
• Power plant piping suspension
• Over-the-road transport
• Navigation equipment
• Transportable shelters
• Electronic cabinets
• Seismic isolation
• Tool machines and automation
• Tuned Mass Dampers
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Wire rope springs overview
Description Standard wire rope springs are comprised of steel cable threaded through metal retaining bars that are mounted for effective shock and vibration isolation. Thanks to their construction, Eidos Engineering wire rope springs are environmentally stable, high-performance shock and vibration isolators that are unaffected by temperature extremes, oils and abrasives.
Main characteristics • High deflection compared with overall dimensions
• Natural frequencies lower than 10Hz with high isolation level
• Reduction of structure-born noise
• High damping
• Magnification at resonance lower than 3
• Excellent resistance to environmental agents
• Maintenance free
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Materials and finishes • Wire rope
o stainless steel o galvanized
• Mount bars o aluminum o alloy steel, galvanized o stainless steel
• Hardware o alloy steel, zinc plated o stainless steel
• Thread o stainless self-clinching insert o stainless steel helical inserts
For special solutions consult Eidos Engineering.
Options
Mounting Eidos Engineering offers a full range of mounting combinations of thru-hole, countersunk, and threaded bars. All configurations are in Metric styles. Consult Eidos Engineering for special mounting configuration.
Loops Eidos Engineering’s wire rope springs can be purchased with the full number of loops, or as few as 2-Loops. The number of loops is indicated in the isolator part number. Performance is provided for full loop isolators. Performance for reduced loop isolators can be obtained by a simple ratio.
Performance
Stiffness Wire rope springs exhibit non-linear stiffness behavior. Small deflections, usually associated with vibration isolation, will have a different spring rate than larger shock deflections. Eidos Engineering publishes typical vibration stiffness values within the catalog. These values can be used to predict system performance.
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The stiffness values listed in the catalog are for full-loop versions. For reduced loop versions, ratio the stiffness by dividing the number of desired loops by the number of full loops.
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Damping Typically 10-25%, depending on size and input level. For specific damping considerations, please consult Eidos Engineering.
Mounting Orientation The diagrams below illustrate typical mounting orientations.
Compression 45° Compression / Roll Fixed Roll
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Size Wire diameter
Loops Height "H" Width "W" Unit weight Max static load
Max deflection
Vertical stiffnes
Roll stiffness
[mm] [mm] [mm] [g] [N] [mm] [N/mm] [N/mm]
EWR-4-35-10 4 10 44.2 41.8 123 315 12.7 286 88
EWR-4-40-10 4 10 48.8 47.2 140 249 14.9 179 59
EWR-4-45-10 4 10 53.4 52.6 158 203 17.3 125 42
EWR-4-50-10 4 10 58.0 58.0 175 169 19.7 91 30
Technical data EWR-4
W
H
B
Size 35 Size 40
Size 45
Size 50
Size 35 Size 40
Size 45
Size 50
Note: Do not extrapolate plotted curves.
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Technical data EWR-8
W
H
B
Size Wire diameter
Loops Height "H" Width "W" Unit weight Max static load
Max deflection
Vertical stiffnes
Roll stiffness
[mm] [mm] [mm] [g] [N] [mm] [N/mm] [N/mm]
EWR-8-60-8 8 8 78.0 74.0 673 1325 20.9 677 225
EWR-8-70-8 8 8 87.0 85.0 785 1010 25.3 427 142
EWR-8-80-8 8 8 96.0 96.0 897 801 29.9 286 95
EWR-8-90-8 8 8 105.0 107.0 1009 649 34.6 201 67
EWR-8-100-8 8 8 114.0 118.0 1121 542 39.4 146 49
Size 60 Size 70
Size 80 Size 90
Size 100
Size 60 Size 70
Size 80 Size 90
Size 100
Note: Do not extrapolate plotted curves.
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Technical data EWR-10
W
H
B
Size Wire diameter
Loops Height "H" Width "W" Unit weight Max static load
Max deflection
Vertical stiffnes
Roll stiffness
[mm] [mm] [mm] [kg] [N] [mm] [N/mm] [N/mm]
EWR-10-80-8 10 8 102.0 98.0 1.4 1850 28.3 698 232
EWR-10-95-8 10 8 115.5 114.5 1.7 1371 35.1 417 139
EWR-10-110-8 10 8 129.0 131.0 1.9 1060 42.0 268 89
EWR-10-120-8 10 8 138.0 142.0 2.1 910 46.8 207 69
EWR-10-130-8 10 8 147.0 153.0 2.3 789 51.7 163 54
Size 80 Size 95
Size 110 Size 120
Size 130
Size 80 Size 95
Size 110 Size 120
Size 130
Note: Do not extrapolate plotted curves.
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Technical data EWR-15
W
H
B
Size Wire diameter
Loops Height "H" Width "W" Unit weight Max static load
Max deflection
Vertical stiffnes
Roll stiffness
[mm] [mm] [mm] [kg] [N] [mm] [N/mm] [N/mm]
EWR-15-95-8 15 8 130.5 119.5 3.7 6307 31.8 2110 701
EWR-15-120-8 15 8 153.0 147.0 4.7 4170 42.5 1050 348
EWR-15-135-8 15 8 166.5 163.5 5.3 3390 49.2 735 244
EWR-15-150-8 15 8 180.0 180.0 5.9 2822 56.0 536 178
EWR-15-170-8 15 8 198.0 202.0 6.7 2260 65.5 368 122
Size 95
Size 120 Size 135
Size 150
Size 170
Size 95
Size 120 Size 135
Size 150
Size 170
Note: Do not extrapolate plotted curves.
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Size Wire diameter
Loops Height "H" Width "W" Unit weight Max static load
Max deflection
Vertical stiffnes
Roll stiffness
[mm] [mm] [mm] [kg] [N] [mm] [N/mm] [N/mm]
EWR-20-130-8 20 8 177.0 163.0 9.1 10715 43.8 2600 865
EWR-20-160-8 20 8 204.0 196.0 11.2 7426 56.7 1400 464
EWR-20-190-8 20 8 231.0 229.0 13.3 5485 70.1 830 280
EWR-20-220-8 20 8 258.0 262.0 15.4 4240 84.1 537 178
Technical data EWR-20
W
H
B
Size 130
Size 160
Size 190
Size 220
Size 130
Size 160
Size 190
Size 220
Note: Do not extrapolate plotted curves.
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Eidos Engineering S.r.l.
headquarters: via Roveredo 20/b 33170 Pordenone, Italy
tel.: +39 0434 507547
fax: +39 0434 507546
e-mail: [email protected]
web: www.eidosengineering.com
