Spring-Operated Brake BFK458 - Casa sueca

1 Lenze moditorque a modular systemSpring- operated Brake BFK458No matter which drive solution you imagine, we make your dreams to our slogan (one stop shopping) we offer you a complete program of electronic and mechanical drive systemswhich is distinguished by reliability and scope of our program includes frequency inverters, speed controllers, servocontrollers, variable-speed drives, gearboxesand motors, as well as clutches and well-known companies use Lenze products in various applications465 469 Product KeyBFK458- Friction plateFlangeMountingflange(Doublebrake)Ce ntring flange(Tacho flange)SealHubRotorComplete statorBasic module NPlug screwShaftsealComplete statorBasic module EHandreleaseSize06, 08, 10, 12, 14, 16, 18, 20, 25 Stator designE adjustable ( Brake torque can be reduced using adjuster nut)N not adjustableUncoded:Supply voltage, hub bore, optionsBF K4 5 8- Product group brakesProduct family Spring-Operated brakesTypeSizeDesignThe Lenze quality standards for development, material, selection, production and assembly meanthat the new Spring-Operated brakes fulfil the highest requirements.

2 These electromagneticallyreleased, Spring-Operated brakes can be used in allcases where movable masses have to be braked inthe shortest possible time or have to be hold in adefined braking force is provided by compressionsprings. This means that the frictional Brake torque is produced in the non-current state, also in theevent of a supply failure. The brakes are new BFK458 range replaces the Spring-Operated Brake types / and main components of the new modular systemconsists of the modules E (adjustable Brake torque)and N ( Brake torque not adjustable). This systemoffers flexibility by combining the basic moduleswith further modular elements to cover the widestpossible range of applications.

3 This catalogue willassist you in selecting and ordering your Spring-Operated Brake fast and will find in this catalogue: Spring-Operated brakes in nine sizes Electrical accessories Calculation example Order form Manufacturer s Declaration and EC Declaration of ConformityThe modular system for all applications: Brake motors Cranes Storage technology Industrial trucks Wood machining equipment Stage machinery, especially hoists Vehicles for the disabled Automation technology Controlled drives Escalators GatesBFK458the compact modular systemLenzeIntroductionThus, Lenze is the competent partner for your application.

4 Lenze is not only a sup-plier for single components butalso offers solutions for complete drivesystems including planning, execution , a worldwide service anddistribution network allows a qualifiedcustomer advisory service on the job and afast and extensive after sales quality assurance system for design,production, sales and service is certifiedaccording to DIN ISO 9001 : 2000. Our customers set the standards for measuring the quality of our products. Our task is to meet your requirements, sincecustomer orientation as a Lenze principledemands the best for worldwide service Our team of experts provides reliable and professional BFK458 en 07/2003 Explanation of Symbols9 Product information10 Principle of operation11 Application examples129/10 Technical DataBrake torques 13 Basic module E/N + flange + hand release14 Basic module N + centring flange15 Basic module N + mounting flange + basic module N16 Ratings17 Operating times18 Installation/Life 19 AccessoriesHand release/Flange/Friction plate/Centring flange/Mounting flange/Seal20 Brake cover and

5 Microswitch21 Microswitch and terminal box22 Bridge rectifiers and half wave rectifiers23/24 Possible installations25 Connecting diagrams 26 Selection table27 Selection Basic information28 Calculation example29 Order Form30 Manufacturer s Declaration and Declaration of Conformity32/33 ContentsSpring- operated Brake BFK4588 Federkraftbremse BFK458 en 07/2003 Explanation of Symbols9 Federkraftbremse BFK458 en 07/2003 Symbols and definitions used:P[kW] PowerMK[Nm] Rated Brake torqueML[Nm] Load torqueMreq[Nm] Required Brake torqueMa[Nm] Deceleration torque n0[min-1] Initial relative speed of the brakeJL[kgm2] Moment of inertia of all driven parts referred to the shaft to be brakedt1[s] Engaging time, t1= t11+ t12t2[s] Disengaging time(Time from the beginning of the torquereduction to MKisreached)t3[s] Slipping time(Time during which there is a relative motion between input and output with Brake engaged)

6 T11[s] Delay time(Time from switching on the voltage tothe beginning of the torque rise)t12[s] Torque rise timeKSafety factorQ[J]Calculated friction work per operationQperm[J]Max. permissible friction work peroperationSh[h-1]Operating frequency, that is the numberof periodical brakingsSl [h-1]Rated air gapProduct informationSpring- operated Brake BFK45810 Federkraftbremse BFK458 en 07/2003 Product informationEfficient, complete range nine sizes standard voltages 24 V, 96 V, 103 V, 170 V, 180 V, 190 V,205 V graduated torques from 2-600 Nm short delivery times for the complete range because ofoptimized logistics enclosure IP54 depending to the application conditions CSA-CUS design as standardVersatile modular design for almost all applications replacement product for the and seriesTorque transmission by friction in dry runningImmediately ready to operate preset air gap.

7 Simple and fast mounting the rated torques are achieved by a special machining ofthe friction faces already after a few operations withoutrunning-in procedure fixed bearing not required at the Brake sideLong life the insulation class F (155 C) ensures a long life of thewinding the brakes are dimensioned for 100 % duty time (current applied to the Brake )Low maintenance long, low-wear rotor/hub connection with proven evolventtoothing low-wear, asbestos-free friction linings air gap must be checked depending on the friction workReliable the continually high product quality is based on the certified quality assurance system according to ISO 9001and ISO 14001 manufacturing and testing according to VDE 0580 Options hand release for the manual release is available for allsizes.

8 Direction of release and mounting at both sides(exception: Tacho Brake ) low-noise designs different types of corrosion protection and the enclosure air gap or wear monitoring by microswitch (as from size 12) new: Monitoring of hand release (see page 22) special voltages and bores on requestPrinciple of operationSpring- operated Brake BFK45811 Federkraftbremse BFK458 en 07/2003 Spring-Operated brakes BFK458 are brakes with two friction surfaces. By means of several pressure springs the Brake friction is generated when no current is brakes are electromagnetically released.

9 While braking,the rotor (3) which is axially movable on the hub (4), ispressed against the counter friction face (6) by means ofthe springs (2) via the armature plate (1). In case of braking,an air gap sl occurs between the armature plate and thestator (7). To release the Brake , the coil of the stator (7) isexcited by means of DC current. The resulting magnetic flux causes the armature plateto be pulled towards the stator. Thus, the rotor is Brake torque can be reduced via the adjuster nut (8) forthe basic module module E + rotor + hub + flange615439728 Basic module N + rotor + hub134297 Principle of operation1=Armature plate2=Springs3=Rotor4=Hub5=Shaft6=Flang e7=Stator8=Adjuster nut9=Adjustment tubesl =Air gapsl sl Application examplesSpring- operated Brake BFK45812 Federkraftbremse BFK458 en 07/2003 Turning, lifting.

10 Moving Lenze Spring-Operated brakes support crane movements Corrosion-resistant designs and different types of enclosuresfor Spring-Operated brakes used in and gates moved by LenzeSpring- operated brakes with manual release monitoring bymicro switches and electromagnetic clutches ensure safe operation of door drives and automatic calls for Lenze brakesDouble Spring-Operated brakes in low-noise design asredundant Brake system are used in stage technology. Technical DataBrake Torques13 Federkraftbremse BFK458 en 07/2003 Size060810121416 1820 25 Torque reductionper detent position [Nm] 1820 2580 E1,5 N/E25 N/E35 N/E65 N/E115 N/E175 N/E2 N/E4 E7 N/E14 N/E35 N45 N/E80 N/E145 N/E220 N2,5 N/E5 N/E9 N/E18 N/E40 N/E55 N/E100 N/E170 N/E265 N/E3 N/E6 N/E11 N/E23 N/E45 N/E60 N/E115 N/E200 N/E300 N/E3,5 N/E7 N/E14 N/E27 N/E55 N/E70 N/E130 N/E230 N/E350 N/E4 N/E8 N/E16 N/E32 N/E60 N/E80 N/E150 N/E260 N/E400 N/E4,5 N/E9 N/E18 N/E36 N/E65 N/E90 N/E165 N/E290 N/E445 N/E5 E10 E20 E40 E75 N/