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Vibration isolators - Wire rope isolators

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Information about Vibration isolators - Wire rope isolators
Technology

Published on February 8, 2014

Author: galatticostef

Source: slideshare.net

Description

Wire rope isolators are comprised of steel cable threaded through metal retaining bars for effective shock and vibration isolation.
- High deflection
- High isolation level
- High damping
- Reduction of noise
- Excellent resistance to environmental agents
- Maintenance free
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WIRE ROPE SPRINGS AND ISOLATORS Eidos Engineering A new technology for noise and vibration control

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 1

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: info@eidosengineering.com Online: www.eidosengineering.com 2

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 workflow, Eidos Engineering finds out the right way to satisfy customer’s needs. 3

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 4

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, highperformance 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 5

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. 6

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. 7

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 8 45° Compression / Roll Fixed Roll

Technical data EWR-4 B W H Size Wire diameter [mm] Loops Height "H" Width "W" Unit weight [mm] [mm] [g] Max static load [N] Max deflection [mm] Vertical stiffnes [N/mm] Roll stiffness [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 Size 35 Size 40 Size 45 Size 50 Size 35 Size 40 Size 45 Size 50 Note: Do not extrapolate plotted curves. 9

Technical data EWR-8 B W H Size Wire diameter [mm] [mm] Loops [mm] [g] Max static load [N] 74.0 673 1325 20.9 Height "H" Width "W" Unit weight Max deflection [mm] Vertical stiffnes [N/mm] Roll stiffness [N/mm] 677 225 EWR-8-60-8 8 8 78.0 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 10 Note: Do not extrapolate plotted curves.

Technical data EWR-10 B W H Size Wire diameter [mm] Loops [mm] [kg] Max static load [N] Height "H" Width "W" Unit weight [mm] Max deflection [mm] Vertical stiffnes [N/mm] Roll stiffness [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. 11

Technical data EWR-15 B W H Size Wire diameter [mm] Loops Max static load [N] Height "H" Width "W" Unit weight [mm] [mm] [kg] Max deflection [mm] Vertical stiffnes [N/mm] Roll stiffness [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 12 Note: Do not extrapolate plotted curves.

Technical data EWR-20 B W H Size Wire diameter [mm] Loops [kg] Max static load [N] Max deflection [mm] Vertical stiffnes [N/mm] Roll stiffness [N/mm] Height "H" Width "W" Unit weight [mm] [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 Size 130 Size 160 Size 190 Size 220 Size 130 Size 160 Size 190 Size 220 Note: Do not extrapolate plotted curves. 13

Eidos Engineering S.r.l. headquarters: via Roveredo 20/b 33170 Pordenone, Italy tel.: +39 0434 507547 fax: +39 0434 507546 e-mail: info@eidosengineering.com web: www.eidosengineering.com 14

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