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friction clutches - Arten Freios e Embreagens Industriais

friction clutches - Arten Freios e Embreagens Industriais

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Table of ContentsHOLDING:A brake function to clamp(hold) a machine or mechanismin place. Often it’s desirable touse a spring–engaged brake.“Air Champ” ®◗ SELECTION CONSIDERATIONS:Torque◗ EXAMPLEIn the event of a power or air loss to thesystem, the spring set caliper brakeengages and holds the incline conveyorat rest preventing it from “freewheeling”due to gravitational forces. This applicationis classified as an occasional stop.◗ TORQUE CALCULATION:Measure the required torque directlyusing the torque lever method:D01125423◗ “AIR CHAMP”FUNCTION EXAMPLESPRODUCT CONSIDERATIONS:S, T, TSE450-1400CALIPER BRAKESDB, BC, BD,VC500 & SPCRPD02139455Torque = P(R) SFWhere:P = Pounds of pull to turn the loadR = Radius of the conveyor drum ininchesSF = Service factorDIAPHRAGMBRAKESJ, K, 4K, 8K,& 12K◗ EXAMPLEThe measured pounds of pull it takes tostart and keep turning the 12 inch radiusdrum is 500 pounds.SE BRAKES100–1000Torque = 500(12)2 = 12000 in. lbsD04125426◗ UNIT SELECTED:A Spring Actuated BD Caliper Brake,Product Number 933500with an 18 1/4 inch diameter disc,Product Number 934200.DFB, QFB1150–2500◗ CONTROL CIRCUIT D05125427The brake is activated when the switchon the control panel is moved to the offposition allowing air to be removed fromthe spring hold–off air canister.CONTROL PANELPROD. NO. 854000QUICK EXHAUST VALVEPROD. NO. 945100FILTERPROD. NO. 939101MUFFLER–OPTIONALPROD. NO. 939300375

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