HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Guest Blogs

Combating Shock & Vibration Is About More Than Cost

NO RATINGS
View Comments: Oldest First|Newest First|Threaded View
Rob Spiegel
User Rank
Blogger
Cost comparisons
Rob Spiegel   4/25/2013 11:39:05 AM
NO RATINGS
Hey Greg, if elastomers are gaining on wire rope isolators, what is the savings? Is it considerable? Do the wire rope isolators come with superior endurance?

JimT@Future-Product-Innovations
User Rank
Blogger
Looks SUPER robust - Never seen one before
JimT@Future-Product-Innovations   4/25/2013 5:22:26 PM
NO RATINGS
I'm kind of embarrassed to say, after 30 years as a design engineer, I've never seen one of these.  Great idea, for all the points listed by Greg.  Yes, I have had elastomers fail for various reasons (primarily vibration cycling, and extreme low temperatures – even exposure to UV), but these rope isolators really look like a clever way to create a strong, flexible, long-lasting solutions.  Been around for 30 years-?  I didn't notice a fabricator's name mentioned ,,,,,

BobDJr
User Rank
Gold
Re: Looks SUPER robust - Never seen one before
BobDJr   4/26/2013 9:16:55 AM
NO RATINGS
@JimT: Fortunately, before beginning my 30 years as a design engineer in earnest, I served on a Navy command & control ship full of receivers and transmitters.  We had a pair of 5kW AM transmitters that were mounted on these, and those cabinets (IIRC) were really big: about 4 feet by 4 feet at the base and probably 6-7 feet tall.

(Check out the link to ITT Enidine at the end of the article - they make these things.)

Cheers,

Bob

Shelly
User Rank
Iron
Size matters
Shelly   4/26/2013 9:24:21 AM
NO RATINGS
These wire rope isolators are an excellent idea when you have the space to use them, although they do make them small enough to hold on your finger-tip.  If you are working on relatively small products, and size (and weight) matters, elastomers are always considered first, to isolate a small PCB, for instance.  Another option is Lodengraf damping, to absorb higher frequency vibrations.  Vibration isolation is a big business, and there are many options.  It will depend on the application.  Thank you for bringing this option to the forefront.

William K.
User Rank
Platinum
Wire rope isolators.
William K.   4/26/2013 6:35:19 PM
NO RATINGS
Another benefit not mentioned is that the wire rope isolators are quite resistant to most petroleum products, although I suspect that oil immersion would reduce the damping a bit. But after seeing some rubber shock mounts just sort of melt away, the wire ones look good.

Pubudu
User Rank
Platinum
Re: Wire rope isolators.
Pubudu   4/29/2013 1:14:29 AM
NO RATINGS
Greg thanks for the article, Actually this is new to me thou you mention it was there for last 30 years in the market.

Kindly let me know (at least some links) the practical application of that wire rope isolator,

William K.
User Rank
Platinum
Re: Cost comparisons
William K.   4/29/2013 2:37:11 PM
NO RATINGS
Rob, I am sure that elasomer isolators arena lot cheaper than the wire rope versions, but that is if only the purchase price is considered. But where the cost of failure is high the wire rope devices suddenly seem to be a far better choice. In addition, they can survive under a leaky hydraulic power unit, while an elastomeric isolator has the elastomer become a very sticky and messy mush, which does not isolate vibration or even hold the power unit in the correct position. At that point the cable isolator became a much less expensive choice.

notarboca
User Rank
Gold
Re: Looks SUPER robust - Never seen one before
notarboca   4/30/2013 4:20:10 PM
NO RATINGS
Thanks for the article, Greg.  I had always thought of dampening with elastomer, or hydraulic/pneumatic absorbers.  Learning some thought provoking ideas today.  I can think of a number of application where these could be useful.

Greg Herman
User Rank
Blogger
Re: Cost comparisons
Greg Herman   5/3/2013 11:21:52 AM
NO RATINGS
Hi Rob,

In most cases the savings is realized from the longevity of the wire rope isolator. Elastomeric mounts are replaced by wire rope isolators when they fail in order to prevent future downtime and replacement costs.  The wire rope isolators are sized to operate below the fatigue limit of the stainless steel cable, providing theoretically infinite fatigue life.  This, along with the corrosion resistance of the unit provides superior endurance in many applications.

Partner Zone
More Blogs from Guest Blogs
As additive manufacturing (including 3D printing) becomes increasingly popular among businesses as a quick and easy solution to creating and evaluating prototypes and end-use products, the debate about whether to outsource production or to purchase equipment for in-house use is at the forefront of industry discussions.
With increasing terrorist threats overseas, organizations are thinking about how best to defend themselves here and abroad. Engineering can play a role, especially when it comes to putting a barrier between yourself and the bad guys.
Time to market is everything, but at the same time, you cant sacrifice quality for speed. Thats where additive manufacturing comes into play.
In the last few years, use of CFD in building design has increased manifolds. Computational fluid dynamics is effective in analyzing the flow and thermal properties of air within spaces. It can be used in buildings to find the best measures for comfortable temperature at low energy use.
Feature-advantage-benefit could help engineers in how we approach design problems, how we sell our ideas to management, and how we market ourselves when it comes to jobs.
Design News Webinar Series
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
9/25/2014 11:00 a.m. California / 2:00 p.m. New York
9/10/2014 11:00 a.m. California / 2:00 p.m. New York
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 20 - 24, How to Design & Build an Embedded Web Server: An Embedded TCP/IP Tutorial
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: 10/28-10/30 11:00 AM
Sponsored by Stratasys
Next Class: 10/28-10/30 2:00 PM
Sponsored by Gates Corporation
Next Class: 11/11-11/13 2:00 PM
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service