Dynaflex LCR, LCD Application Data, Coupling Requirements, Design Parameters, Remote Driven Units

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DYNAFLEX ELASTOMERIC FLEXIBLE COUPLINGS

Page 120 of 124

 

 

Dynaflex LCD Series Couplings

Torsional System Analysis Input

Requirements

Dynafl ex couplings offer unique advantages with the soft torsional spring rate that isolates torsional vibration, mitigates shock and reduces noise transmission. In order to benefi t from these advantages, an analysis must be made of the application and a coupling selected which meets the specifi c requirements. The following checklist sets forth the information required to initiate the analysis:

Application Data

What is the driving unit, driven unit? Include enough information to determine disturbing frequencies (e.g., type of engine, number of cylinders, number of cycles).

What is the operating torque (normal, maximum)?

What is the operating speed (range, at normal torque and at maximum torque)?

What are the environmental conditions (temperature, oil type and amount of exposure, corrosive factors, other factors)?

Coupling Requirements

What are the primary functions of the coupling (torsional vibration isolation, torsional shock mitigation, noise attenuation, shaft misalignment accommodation – angular, parallel, axial)?

If known, what torsional spring rate should the coupling have?

If the required torsional spring rate is not known, what are the rotational moments on inertia of the driving and driven masses?

How much misalignment must the coupling accommodate (angular, parallel, axial)?

How much, if any, axial thrust will be on the coupling?

Design Parameters

What space is available for the coupling (maximum length, diameter)?

What is the maximum weight the coupling can be, if weight is limited?

What are the shaft diameters and method of attachment (keyway, spline, set screws, fl ange)?

What special features are required? (Inner member design – hubs, fl anges, splines, etc. Outer member design – pilot diameter bolt pattern, etc.)

Remote Driven Units

Multiple U-joint shafts (especially longer shafts) and the speed at which the shaft rotates (especially higher rpm’s) can create complex stability problems. To assure satisfactory coupling performance, all design layouts for remote mounted driven units should be reviewed by LORD Engineering. LORD analytical capability is only one part of the engineering service available on all coupling applications.

What Else?

If your application is unique or unusual, include any information that you believe will have an effect on the coupling design or selection. If you have any questions as you prepare this data, call us. See following page for data form.

Reference Literature from Lord Corporation

Design Monograph 1107

Understanding Torsional Vibration

A part’s listing in this catalog does not guarantee its availability.

 

To download/print the most current catalog, go to www.lordfulfi llment.com/upload/PC7000.pdf.

Rev.1 10/08

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Contents Dynaflex Elastomeric Flexible Couplings Dynaflex Elastomeric Flexible Couplings Page 87Application Dynaflex Elastomeric Flexible Couplings Product LinesDynaflex Elastomeric Flexible Couplings Page 89 Coupling Application GuideDynaflex Elastomeric Flexible Couplings Dynaflex Elastomeric Flexible Couplings Page 91 Features and BenefitsDynaflex Shear-Type Couplings Coupling Part Diameters Specifications and DimensionsStandard Bore Static HP at Number Lb-in Lb-in/deg Size ±20%Standard Bore Tolerances Dynaflex Elastomeric Flexible Couplings Page 93Bore Sizes Tolerance Dynaflex Elastomeric Flexible Couplings Dynaflex Elastomeric Flexible Couplings Page 95 Dynaflex Spool-Type CouplingsNumber Diameter Thickness Attachement Coupling Configuration Capacity ChartSpool Part Thread Bolt Circle Diameter Torque lb-in xPart Dimensions J-4624-1 Part Dimensions J-3424-2Dynaflex Elastomeric Flexible Couplings Dynaflex Elastomeric Flexible Couplings Page 99 Dynaflex Bushing-Type CouplingsExample Selection GuideTorsional Flexibility Recommended Misalignment LimitsParallel Arrangement Selection Dynaflex Elastomeric Flexible Couplings Page 101Series Arrangement Selection Radius Typical Socket DimensionsDia Dynaflex Elastomeric Flexible Couplings Page 103 Dynaflex LCR Series CouplingsTypical Applications Typical End Product ApplicationDynaflex Elastomeric Flexible Couplings Page 105 SpecificationsPart Number Axial ParallelPart Dimensions Dynaflex Elastomeric Flexible Couplings Page 107108 Dynaflex Elastomeric Flexible Couplings Page 109 Dynaflex LCD Series CouplingsTorque Load lb-in x Angular Deflection deg Standardization of Proven ConceptLoad Deflection Data Load lb DeflectionDynaflex Elastomeric Flexible Couplings Page 111 Dynamic Torsional Stiffness, KθType 1 Dia Type 2 Dia Dynaflex Browning Bushing LCD Series Bore RangeNumber Dynaflex Elastomeric Flexible Couplings Page 113 Rated Performance CharacteristicsLb-in Lb-in/rad Rad Lb/in 114 No. Dynaflex Elastomeric Flexible Couplings Page 115Length Hole Dia HolesDynaflex LCD Series Couplings Installation Guide Flywheels for Engine Mounted Torque Converters SAE J927 Nov InstallationDynaflex Elastomeric Flexible Couplings Page 117 Tapped HolesEngine Flywheel to Keyed Shaft Direct Flywheel to Flanged Shaft Direct LCD -01 SeriesVehicle Engine with Large Angle Drive Requirements Stationary Equipment Having a Tapered Shaft ConnectionDesign Parameters Application DataCoupling Requirements Remote Driven UnitsDynaflex Elastomeric Flexible Couplings Page 121 Data Required for Lord Coupling RecommendationCoupling Requirements