DYNAFLEX ELASTOMERIC FLEXIBLE COUPLINGS | Page 110 of 124 |
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Standardization of Proven Concept
Using the experience gained in designing and producing special Dynafl ex couplings, LORD has developed a new standard product line of
These couplings have a specially designed elastomeric element bonded to a metal inner member which is then preloaded and
This unique concept provides low torsional spring rates which effectively isolate critical vibratory disturbances in driveline and accessory systems, thus prolonging equip- ment life. Misalignment and torsional shock loads are absorbed by shear defl ection in the elastomeric element.
The ability of the coupling to slip at the outer member with short duration shock overloads protects the drive- line and accessory components from premature failure.
The Dynafl ex LCD Series Coupling has been particularly successful for diesel driven applications.
Dynafl ex LCD Series Couplings are available in 75 to 2000 hp ratings at a nominal 2000 rpm. Each size is also available in two stiffness values. These are referred to as the A and C stiffness values. The C stiffness parts are normally stocked.
Load Deflection Data
Figures 1 through 3 illustrate the torque or load versus defl ection characteristics for the -A and -C stiffnesses of the LCD-0400 size couplings. The general characteristics of these curves are typical for all Dynafl ex LCD Series Couplings.
Figure 1 shows the linearity of the coupling spring rate at (and well above) the rated capacity of 12,500 lb-in torque. The curves also demonstrate the unique overload slip characteristic at about 60,000 lb-in torque. It should be noted, however, that the overload protection results from slipping of the coupling. This slipping generates heat, and therefore continuous running at overload could be injurious to the coupling.
Figures 2 and 3 illustrate the fl exibility of Dynafl ex LCD Series Couplings to accommodate axial and radial misalignment. The -A variation is made in a softer elas- tomer to produce a lower torsional spring rate and there- fore had the lower axial and radial spring rates. All spring rates are ideally linear over the normal operating range of defl ection.
Figure 1 – Torsional Load/Deflection Curves
Torque Load (lb-in) x 000
Angular Deflection (deg)
Figure 2 – Axial Load Deflection Curves
Load (lb)
Deflection (in)
Figure 3 – Radial Load Deflection Curves
Load (lb)
Deflection (in)
A part’s listing in this catalog does not guarantee its availability. |
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To download/print the most current catalog, go to www.lordfulfi llment.com/upload/PC7000.pdf. | Rev.1 10/08 |