Vibration Isolation Overview

Vibration Isolation OverviewSession 2 Selection Procedure

Choosing the right partGathering Information

Airmount

• • FIRESTONE INDUSTRIAL PRODUCTS COMPANY

Selection Procedure

• Airmount isolator Design Parameter Sheet• Selection Guide• Load Requirements• Isolation Requirements• Individual Static Data Chart• End Closure Options

Selection Procedure

• Page 105in the MEMDG

Selection Procedure

Required Information:1. Number of mounting

points2. Load (load distribution)3. Disturbing Frequency4. Space available5. Available pressure6. Special conditions

Choosing the right partReading the catalog

Using the air spring Engineering Manual & Design Guide

• Take information from Design Parameter Sheet• Look on page 33 to determine 2 or 3 possible parts that

could accomplish the task• Remember if you want better isolation, you need a part with

more internal volume and a flatter load curve (increase the number of convolutions on a part of the same diameter to get these characteristics)

• Go to the detail page in the catalog for these parts• Review these parts to pick the best candidate• Determine the best end closure option (detail page and

Selection Procedure

• Page 33 in the MEMDG

Selection Procedure

Greater internal volume and less slope to effective area curve will give a lower natural frequency (better isolation), however, 3 convolution and 1T style parts have special stability concerns, so please consult Firestone before using these styles.

Isolation Effectiveness

See page 26 of MEMDG

Catalog data page• Air Spring Data

Page • #20, Page 59• Part Description• Part Dimensions• Isolation Table• Static Data Chart• Force Table

Catalog data page

Recommended Airmount

Design Height 215 mm

Selection Procedure (end closures)

• Page 32 and 33 in the MEMDG

Using the air spring Engineering Manual & Design Guide

• Take information from Design Parameter Sheet• Look on page 33 to determine 2 or 3 possible parts that could

accomplish the task• Remember if you want better isolation, you need a part with more

internal volume and a flatter load curve (increase the number of convolutions on a part of the same diameter to get these characteristics)

• Go to the detail page in the catalog for these parts• Review these parts to pick the best candidate• Determine the best end closure option (detail page and page 32)

• 16

MarshMellow

Design Parameter Sheet

• Step 1 – Review the MarshMellow Design Parameter Sheet. This will help remind you of all of the questions you should ask, and get the information you would need to get help from your Firestone representative.

Choosing the right partReading the catalog

Using the MarshMellow spring catalog

• Take information from Design Parameter Sheet• Look on pages 30 and 31 to determine 2 or 3 possible parts

that could accomplish the task• Remember if you want better isolation, you need a part that is

taller and therefore, has a flatter load curve• You also need to make sure the part has the travel (or stroke)

required by the application• Go to the detail page in the catalog for these parts• Review these parts to pick the best candidate• Be sure to review the mounting requirements listed on the

Selection Guide

Catalog data page

• MarshMellow Data Page

• 0176 page 49• Isolation Table• Part Dimensions• Mounting Requirements• Static Data Chart

Using the MarshMellow spring catalog

• Take information from Design Parameter Sheet• Look on pages 30 and 31 to determine 2 or 3 possible parts

that could accomplish the task• Remember if you want better isolation, you need a part that is

taller and therefore, has a flatter load curve• You also need to make sure the part has the travel (or stroke)

required by the application• Go to the detail page in the catalog for these parts• Review these parts to pick the best candidate• Be sure to review the mounting requirements listed on the

Vibration Isolation Overview

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