Conceptos Básicos Acoplamientos

7/30/2019 Conceptos Básicos Acoplamientos

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Kop Kop - - Flex Train ing Flex Train ing

Coupl ing Basics

Emerson Power Transmiss ion



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CONTENTS

• Introduction, Terminology, Theory ofOperation– Gear

– Grid– Disc

– Elastomer

• Product Offering/Matrix

• Served Industries & Applications• Summary

KOP-FLEX, FASTS, KOP-GRID, MORSE, BROWNING AND MORFLEX ARE REGISTERED TRADEMARKS OF EMERSON POWER

TRANSMISSION MANUFACTURING, L.P.

© Emerson Power Transmission Manufacturing, L.P., 2001. ALL RIGHTS RESERVED



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In t roduct ion

• Connect 2 Shafts

• Transmit power from Driving Shaft to Driven Shaft

• Accommodate Four Types of Misalignment:

– Angular, Offset or Parallel, Combination and Axial• Protects System

Coupling Function

Transmit PowerTransmit Power

Accommodate MisalignmentAccommodate Misalignment

Compensate forCompensate forEnd MovementEnd Movement



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Introduct ion

MisalignmentTypes:• Angular

2. Offset or Parallel

3. Combination

4. Axial

What causes Misalignment:• Installation (human) Errors

• Thermal Growth

• Worn Bearings

• Dynamic Twist of Bases Under Load

• Settling Bases / Foundations



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Introduct ion

3 Basic Categories (flexible shaft couplings)

• Mechanical ( Lubricated)

• Transmits torque through a lube film. Accommodatesmisalignment with rocking motion through gearing.

• Metallic (Non-lubricated)• Transmits torque through compression or tension of

metal. Accommodates misalignment through

deflection of metal.• Elastomer (Non-lubricated)

• Transmits torque through compression and/or shearof Elastomer. Accommodates misalignment throughdeflection of Elastomer.



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Lubr icated Coup l ings

• Gear– Fasts

– Model B

– Walron– Series H

• Grid

• Miscellaneous

– Chain– Universal Joints



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Lubr icated

• Advantages of Gear Couplings– Accommodates Large Misalignment including

most axial misalignment

– Very Economical

– High Torque Capacity (Torque to OD Ratio)

– High Torsional Stiffness

• Disadvantages of Gear Couplings– Regular Maintenance / Lubrication Required

EPT Gear Couplings

Fast’s® - Model B - Series H - Waldron



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Terminology

• Flex Hubs – Attached to Shaft

• Sleeves – Slide over hub teeth (shrouded or exposedbolts)

• Accessories – bolts/nuts, gaskets and seal

• Rigid – Like a flex hub (seats on shaft) but doesn'taccommodate misalignment since it has no teeth

Full Flex Rig id



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Basics

• Hubs have external (male) gear teeth

• Sleeves have internal (female) gear teeth

• Rigid has no teeth

*Sleeve teeth contact hub teeth one for one – unlike gearbox;power is transmitted from tooth to tooth thru lube

Sleeve Teeth

Hub Teeth



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Basics

• Full Flex or Double Engagement - twoflexible halves bolted together - usedexclusively on 4 Bearing Systems

• Flex Rigid or Semi-Flex or SingleEngagement - one flexible half bolted to arigid half - used on 3 bearing Systems andfloating shafts.

(See page M-16)



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• Mill Motor Type (Industry standard shaft end,dimensions, and details)

• Limited End Float

• Floating Shaft

• Electrically Insulated• Short, Medium and Long Slide (Utilize full length

teeth- compensate for thermal expansion)

• Shear Pin Overload Release Type

• Brake Wheel or Disc Types

• Double Engagement DE Type

• Vertical Adjustable VAR Type

• Cutout Disengaging

Other Types

Custom Designs Available for Unique ApplicationsCustom Designs Available for Unique Applications



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Tapered Grid

– Can Replace Flex Element (Tapered Grid) Without Moving Hubs– Absorbs Medium Shock Loads

– Provides Some Torsional Damping– High Fatigue Life– Moderate Torque Capacity– Very Economical

T10 - T20 - T31 - T35•Advantages:

•Disadvantages:

– Maintenance / Lubrication Required Periodically– Torsionally Soft– Balanced Couplings are NOT Available– Typically Shorter Life than Gear Couplings– Not Suitable for Critical Applications

Types



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Browning and Morse

Chain Type

Inexpensive … Browning DRC chain couplingsprovide long service life with the hardened

working members.

Universal Joints

Inexpensive … Browning Universal Joints

provide long service life withminimum maintenance.



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Non-Lubr icated Coup l ings

• KD ® Disc Type

• Elastomer- Resilient Max-C- Elastomeric- Jaw

- Ever-Flex- Morflex



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Disc - Theory of Operat ion

• Transmit Torque Through Flexible,Stainless Steel Disc Packs Instead of

Gear Teeth.• Compensate for Misalignment by

Deflection of Disc Packs Instead ofGear Teeth.

• No Wearing Parts - Flexing Insteadof Sliding



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KD Disc Overview

• No Lubrication Required

• Unitized Disc Packs -

Ease of Assembly, FactoryAssembles Many Components

• Styles Available to Replace Gear

Type Couplings - Close Coupled,Spacer, Floating Shaft

4. High Torque Ratings



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Terminology

• Disc - Stainless Steel Flexible Disc

> (.012” To .015” Thick)

• Disc Pack - Unitized Pack Made Up of Several

Discs• Link - The Disc Section Between Bolt Holes

• Scallop - Optimized Disc Profile, Thickest(Strongest) Near Bolt Holes

• Sizing Designations:– First 2 Digits is Size (For Example: size 204 =

2.0)

– Last Digit is Number of Bolts (204 = 4 Bolt Style)



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Disc Coupl ings

• Advantages:– No Maintenance - No Lubrication

– Designed for Infinite Life– Good Inherent Balance

– Zero Backlash

• Disadvantages:

– Less Tolerant of Extreme Misalignment– Typically Larger Diameter Compared to Gear

– Less Axial Float Than Gear

Advantages/Disadvantages



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Resi l ient Max -C

• Theory of Operation

– Transmit Torque ThroughResilient Blocks In

Compression– Compensate for Misalignment

by Deformation of Blocks

– Resilient Blocks Absorb Shock

and Dampen TorsionalVibration

– Fail-Safe, Interlocking BladeDesign



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Max-C Types

Advantages• Non -Lubricated, Low Maintenance.

• Resilient Material in Compression, Not Shear.• Fail-Safe, Interlocking Blade Design.

• Replaceable Blocks Are the Only Wear Item.

Disadvantages• Large size compared to gear couplings

• Speed limitations due to size

K2, UB, CB and WB



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Elas tomer ic Coup lings

Wrap around rubberElement

Aluminum HubsAccommodatesMisalignment

Provides TorsionalDamping



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Elas tomer ic Coup l ings

Advantages:– Wrap-Around Element Can Be Replaced Without Moving

Equipment

– Non-Lubricated, Low Maintenance

– Pre-Compressed Rubber Element Always in Compression(Not in Shear – Like most competitors)

– Aluminum Hubs for Corrosion Resistance (Steel Hubs AreAvailable, and Inventoried in Sizes #40 - #60).

Disadvantages: - Torque Capacity is slightly Less than Grid, Jaw and Gear

Type Couplings

- Speed Limitations



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Browning and Morse

Ever-Flex

Inserts Available: Buna-N (Standard), Hytrel,Urethane and BronzeInterchangeable With Lovejoy Type L,

Martin Type ML, and Maurey Type FC

Jaw Type

A rubber flex member permanently bondedto steel flanges. Minimum maintenancerequired, reduce Torsional vibrations.

Morflex

Specially developed, resilient, non-cold-flowneoprene biscuits are responsible for the

flexibility of the Morse Morflex Coupling.Great for Low hp Reciprocating Drives



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Product Offer ing

St andard Product s



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Eng ineered Product Offer ing

M i l l Product s



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Engineered Produc t Offer ing

H igh Performance



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Produc t Matrix

EngineeredEngineered

ProductsProducts

StandardStandard

ProductsProducts

High

Performance

Mill

Products

HP Gear HP Disc

Diaphragm

Gear, Grid

Chain

Elastomeric

Jaw, Disc

Universal Joint

Resilient

Gear Spindle

Large Gear

HiHi--MaintenanceMaintenance

LubricatedLubricated

LowLow--MaintenanceMaintenance

NonNon--LubricatedLubricated



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Primary Served Indus tr ies

• Steel Mills

• Pulp & Paper Mills

• Petrochemical Plants

• Power Plants• Refineries

• Cement Mills

• Mines

• Rubber



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Served Appl icat ions

• Steel Mills: Casters, Run-out/Entry Tables,Cranes, Edgers, Hot/Cold/Bar Rolling Mills,

Straighteners• Pulp & Paper: Barker, Calendars, Chippers,

Coaters, Couch/Press Rolls, Dryers, Jordans,Refiners and Rolling Mill Drives

• Cement Mill / Mines: Rotary Mills (Ball,Kiln, Hammer Drives), Crushers, Conveyors



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Served Appl icat ions

• Petrochemical/Refinery/Power Plant/GasPipe Line: Pumps, Turbine to Compressor orGenerator Drives, Melt Pump, Cooling

Tower, Boiler Feed Pump• Others: Pumps, Conveyors, Fans, Feeders,

Marine Propulsion Drives, Cranes, Mines

Anywhere There is Driving to DrivenEquipment Shaft Connection



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Avai lable Resources

• Internet: www.emerson-ept.com

– Price, Availability, Order Entry

– Product Selections

– Smart Interchanges

– CAD Drawings

– eCatalog– Media Library

• EPT Customer Service (800-626-2120)

– Price, Availability, Order Entry

• Technical Services – Standard Product (800-626-2093)

- Standard / Mill / High Performance (410-768-2000)

– Technical Questions Regarding Products

– Application and Interchange Assistance

Documents

Conceptos Básicos Acoplamientos