friction clutches - Arten Freios e Embreagens Industriais

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Table of Contents◗APPLICATION ENGINEERING DATA“Air Champ” ®◗ PEAK INPUT RATEThe Peak Input Rate Capacity is the limiting factor in high inertia starts and stops. It is the rate at which the clutch or brake absorbs heat (atfriction interface) during the acceleration period, while the interfaces are slipping or until the load and the clutch are operating at the samespeed. This heat will generally not or exceed the Peak Input Capacity unless the acceleration time exceeds clutch or brake transient time.Transient time is the time required to reach the air pressure setting. The correct Input Rate occurs when the start-up time is greater than theresponse time of the clutch or the stopping time is greater than the response time of the brake. Increasing the response time (by using acontrol valve with a small orifice, or adding an air cavity between the valve and the unit) increases the start-up time. This reduces thethermal peaks that create damaging thermal gradients with the friction plate.The Peak Input Rate during such a start is evaluated from an estimate of the speed difference between the facing and the friction disc at theend of the transient period and the torque value expected at the air pressure setting. The safe Peak Input Rate of a clutch or brake with castiron plates and organic friction linings is approximately 0.9 horsepower per square inch of interface area.Refer to the Function Example for High Inertia Starts or Stops on page 381for a working example of this product selection consideration.Calculating Peak Input Rate Capacity:Calculate the speed change (ˆN 1 ) during the transient period. Assume 50% torque and atransient time of 0.1 second for most applications.Formula: ˆN 1 =T (t)0.039 (WK 2 )T = rated clutch or brake torquet = required transient time in secondsWK 2 = total inertia load in pound-feet 2ˆN 1 = speed change as measured in RPMThe speed difference (N d ) between the facing and friction disc at the end of the transientperiod is the difference between full speed (RPM) and the speed change (ˆN 1 ).Formula: N d = RPM - ˆN 1 N d = speed difference in RPMRPM = rating of the clutch or brakeˆN 1 = speed change in RPMCalculate the Peak Thermal Input in horsepower (HP) for your application.Formula: HP =N d (T)63000HP = peak thermal input of applicationN d = speed difference in RPMT = torque at the set air pressureCalculate the Peak Thermal Input of a clutch or brake.Formula: P th = Ιa (0.9) P th = clutch or brake thermal inputΙa = effective interface area (see catalog table for product)Compare your applications Peak Thermal Input requirement with that of the clutch or brake.If the clutch or brake has a higher Peak Thermal Input calculation than your applicationsrequirement, you are using the correct product.370
Table of Contents“Air Champ” ®APPLICATION ENGINEERING DATA◗ SPROCKET TABLESThe tables below indicate compatible Sprocket options for the applicable Clutch.1. Find your specific Clutch Model Number.2. Determine a Chain Size and minimum T Configuration from the table.Refer to the Clutch drawing to obtain pilot diameter, bolt circle, hole size and location information. Some minimum sprockets may not providesufficient load carrying capacity, due to the application. If in doubt, consult Nexen to insure suitability.Friction ClutchesChain Size ..... 25 35 41/40 50 60 80 100MBW .....................40 T.............28 T..............22 TF-450..................48 T.............32 T..............25 T..............21 TL-600......................................40 T..............30 T..............25 T..............21 TM-800..........................................................38 T..............31 T..............26 T..............21 TH-1000 ........................................................45 T..............37 T..............31 T..............24 T................20 TXHW............................................................................................................................35 T................27 TDepending on the application, some of the minimum sprockets will not provide load carrying capacity.Tooth ClutchesChain Size ..... 25 35 40 50 60 80 100 120 140 160 2005H20.......................................36 T..............28 T..............22 T..............20 T5H30.......................................40 T..............32 T..............26 T..............22 T..............17 T5H35.......................................40 T..............32 T..............26 T..............22 T..............17 T5H40.......................................45 T..............34 T..............28 T..............24 T..............18 T5H45............................................................36 T..............30 T..............26 T..............20 T5H50............................................................40 T..............34 T..............28 T..............22 T................19 T5H60.................................................................................38 T..............32 T..............25 T................21 T..............19 T5H70......................................................................................................38 T..............29 T................24 T..............21 T.............19 T5H80 ...........................................................................................................................33 T................27 T..............23 T.............21 T...............19 T5H100......................................................................................................................................................................30 T.............25 T...............23 T...............19 TDepending on the application, some of the minimum sprockets will not provide load carrying capacity.Multi-Disc ClutchesChain Size ..... 25 35 40 50 60 80 100 1204H30.......................................36 T..............28 T..............24 T..............20 T4H35.......................................40 T..............32 T..............26 T..............22 T..............17 T4H40.......................................45 T..............34 T..............28 T..............24 T..............19 T4H45............................................................40 T..............32 T..............28 T..............21 T4H50............................................................42 T..............34 T..............29 T..............23 T................19 T4H60.................................................................................40 T..............34 T..............26 T................21 T4H70......................................................................................................38 T..............30 T................24 T..............21 TDepending on the application, some of the minimum sprockets will not provide load carrying capacity.Dual Plate ClutchesChain Size ..... 50 60 80 100 120 140 160 200DPC-9T...............34 T.............28 T..............22 T..............19 TDPC-11T.................................33 T..............25 T..............21 T..............19 TDPC-13T......................................................33 T..............27 T..............23 T..............21 T................19 TDPC-15T...........................................................................29 T..............25 T..............21 T................20 T..............19 TDepending on the application, some of the minimum sprockets will not provide load carrying capacity.Torque LimitersChain Size ..... 25 35 40 50 60 80 100 120TL10/15..............45 T.............30 T..............24 T..............20 T...................................................................................TL20.......................................40 T..............30 T..............24 T..............21 T..............................................................TL30.......................................42 T..............32 T..............26 T..............22 T..............18 T.........................................TL40............................................................40 T..............30 T..............26 T..............20 T.........................................TL50............................................................42 T..............34 T..............29 T..............23 T................19 T..................TL60............................................................48 T..............38 T..............32 T..............25 T................21 T..................TL70......................................................................................................37 T..............29 T................23 T .............21 TTL80............................................................................................................................33 T................27 T..............23 TDepending on the application, some of the minimum sprockets will not provide load carrying capacity.This table applies to the TL/2 series also.371
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Table of ContentsPRODUCTCAT ALOG10-
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Table of Contents◗PRODUCT NUMBER
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Table of Contents◗FAMILY OF PRODU
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Table of Contents◗FAMILY OF PRODU
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Table of Contents“Air Champ” ®
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Table of Contents◗APPLICATION GUI
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Table of ContentsWeb ProductsGUIDE
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Table of Contents◗ MICRO FRICTION
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Table of Contents◗“Air Champ”
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Table of ContentsWeb ProductsIn acc
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Table of ContentsWeb ProductsTENSIO
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Table of ContentsEclipse SERVOMOTOR
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Table of ContentsEclipse SERVOMOTOR
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Table of ContentsEclipse LINEAR MOT
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Table of ContentsEclipse NEMA AC MO
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Table of ContentsEclipse METRIC AC
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Table of Contents◗ BW MODEL BRAKE
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Table of Contents◗DRUM BRAKES“A
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Table of ContentsDRUM BRAKES “Air
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Table of ContentsDRUM BRAKES “Air
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Table of Contents◗HEAVY DUTY BRAK
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Table of Contents◗BRAKESWeb Produ
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Table of Contents◗CLUTCH/BRAKES
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Table of Contents◗CLUTCH/BRAKESFM
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Table of ContentsCLUTCH/BRAKES “A
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friction clutches - Arten Freios e Embreagens Industriais

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