Outside-of-the-box solutions for coupling applications
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Outside-of-the-box Solutions for Coupling Applications
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Transcript of Outside-of-the-box solutions for coupling applications
Outside-of-the-box Solutions for Coupling Applications
q This webinar will be available afterwards at www.designworldonline.com & email
q Q&A at the end of the presentation q Hashtag for this webinar: #DWwebinar
Before We Start
Moderator
Michael Jermann Design World
Paul Petruska Lovejoy Inc.
Bobby Watkins Ruland Manufacturing
Randy Kingsbury Helical
Jeff Hinchley R+W Coupling Technology
Outside-of-the-box In Energy
Randy Kingsbury
Oil Exploration and Production
Challenges • Highly corrosive environment • Must be very reliable • Coupling must be flexible for .010 inch parallel offset • Cannot exactly control shaft penetration into coupling • Capable of “blind” assembly (no tools)
Requirement • Material for corrosive environment • Good factor of safety • Capable of misalignment • Relief in flexible area • Sliding attachment (features inline)
Helical’s Solution
Features • Material: MP35N® Carpenter Alloy
o Non-magnetic o Nickel-Cobalt-Chromium-Molybdenum
HELI-CAL Flexure
Attachment
• Stress Relief Holes • Spline on both ends
Relief
Relief
Custom Couplings The “best” solution
• Optimize performance o Torque o Misalignment Up to 90 degree angles
• Large selection of specialty materials • Features that can be machined or EDM’d
Coupling Solu+on for Pumping Applica+on
By
Background
Customer was experiencing intermit coupling failures on a pumping system. The applica9on sizing was confirmed to be correct for the size of electric motor HP & speed and equipment service factor.
Inves+ga+on
The analysis of the coupling pointed to an overload type failure as the disc pack fasteners experienced severe deforma9on & fracturing.
Inves+ga+on
Based on the coupling root cause analysis, the equipment was instrumented to measure torque and speed at the coupling interface. It was found that the system was experiencing a torque condi9on during startup that created a transient load that exceeded the couplings peak torque ra9ng. Over a series of start-‐ups, this created a low cycle fa9gue type overload failure on the coupling.
Solu+on
The coupling was sized with the new torque level requirements (as measured). While the resul9ng coupling selec9on was mul9ple sizes larger than the original, the larger size was required as the number of startup cycles the coupling would experience over its service life necessitated the coupling have the ability to withstand a high number of startup cycles.
APPLICATION PROFILE: BETTER AUTOMOTIVE COMPONENT TESTING WITH COUPLINGS. R+W Coupling Technology
R+W Coupling Technology
Precision Couplings for Motion Control and Power Transmission
BACKGROUND: End of line func9onal test machine 400 lb flywheel to mimic the iner9a of a diesel engine driveline Coupled to a custom camshaO actua9ng a fuel injector
BACKGROUND:
PROBLEM: Instantaneous RPM droop within a 360° rota9on Nega9vely impac9ng results Exis9ng steel disc coupling not providing adequate s9ffness
SOLUTION: Coupling with higher torsional s9ffness Coupling with con9nuous symmetry
SOLUTION:
SOLUTION MAYBE: Coupling with lower torque ra9ng per body size Exis9ng space restric9ons
SOLUTION: Custom configura9on taking shaO clamping inside the bellows Flanges made from 4140 extending inside bellows cavity Keyless locking devices to secure shaO to flange
SOLUTION:
SOLUTION: BK1 / 6000 / XX showed 1/3 the phase difference / rpm droop of the tradi9onal steel disc coupling Retrofit of the en9re line at engine plant
THANKS FOR YOUR TIME!
CONTACT OUR COUPLING EXPERTS AT: (888)479-‐8728 or +1(630)521-‐9911 from outside the USA R+W: THE ULTIMATE COUPLING
High Temperature Coupling Application
Introduction • Medical instrumentation manufacturer
had tried many standard couplings for use in a pharmaceutical research instrument, none of them being successful.
• The company contacted Ruland Manufacturing because of our expertise and wide variety of product.
Ruland flexible couplings
Application Specifics • Day to day requirement for the coupling
was not unusual or difficult to address.
• Large parallel misalignment of the shafts needed to be accounted for, the speed was low, zero-backlash with a high level of accuracy was required.
Representation of parallel misalignment
Problem • Periodic sterilization of the instrument in an
autoclave was required.
• The high temperature was destroying any standard coupling design that met the mechanical operational requirements.
• Standard coupling designs that could survive the high temperature did not have the amount of parallel misalignment needed for the application.
High temperature is an issue
Coupling Considerations • A basic coupling design must be chosen as a
starting point for a custom solution.
• Basic oldham design had the large parallel misalignment capabilities, as well as the required accuracy.
• Standard oldham discs could not survive the temperature in the autoclave requiring us to look beyond our standard materials.
Oldham couplings accommodate high parallel misalignment and accuracy
Material Selection • Design engineers needed to find a suitable high
temperature material for the custom disc that could meet the required performance characteristics.
• Manufacturing had to find a way to machine this material with a high level of precision to maintain zero-backlash operation.
• The result was a custom disc made from PEEK.
• This satisfied the mechanical and temperature requirements and has solved the customer’s issue.
Ruland PEEK disc
Questions Thank you for your time. We are happy to answer any questions.
Questions? Michael Jermann Design World [email protected]
Bobby Watkins Ruland Manufacturing [email protected]
Randy Kingsbury Helical [email protected]
Paul Petruska Lovejoy Inc. [email protected]
Jeff Hinchley R+W Coupling Technology [email protected]
Thank You q This webinar will be available at
designworldonline.com & email
q Tweet with hashtag #DWwebinar
q Connect with Design World
q Discuss this on EngineeringExchange.com
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