Vibration Isolation Overview Session 2 Selection Procedure
Feb 16, 2016
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
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Selection Procedure
• Page 105in the MEMDG
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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
• • FIRESTONE INDUSTRIAL PRODUCTS COMPANY
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)
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Selection Procedure
• Page 33 in the MEMDG
• • FIRESTONE INDUSTRIAL PRODUCTS COMPANY
Selection Procedure
• Page 33 in the MEMDG
• • FIRESTONE INDUSTRIAL PRODUCTS COMPANY
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.
• Page 33 in the MEMDG
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Isolation Effectiveness
21-2
21
113-1
113
See page 26 of MEMDG
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Catalog data page• Air Spring Data
Page • #20, Page 59• Part Description• Part Dimensions• Isolation Table• Static Data Chart• Force Table
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Catalog data page
Recommended Airmount
Design Height 215 mm
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Selection Procedure (end closures)
• Page 32 and 33 in the MEMDG
• • FIRESTONE INDUSTRIAL PRODUCTS COMPANY
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
• • FIRESTONE INDUSTRIAL PRODUCTS COMPANY
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
• • FIRESTONE INDUSTRIAL PRODUCTS COMPANY
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
page
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Selection Guide
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Selection Guide
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Catalog data page
• MarshMellow Data Page
• 0176 page 49• Isolation Table• Part Dimensions• Mounting Requirements• Static Data Chart
• • FIRESTONE INDUSTRIAL PRODUCTS COMPANY
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
page
Break