Electromagnetic Spring Applied Brake 4BZFM
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GKN LAND SYSTEMS Stromag Dessau safety in motion 4 BZFM 449-00004 Version: - 08.10.2012 EXPECT MORE

Electromagnetic Spring-Applied Brake ■/ Holding and working brake variations for off shore and industrial applications where high protection against harsh environment is essential ■/ Usable for windlasses, anchor winches, shipboard cranes, cargo winches, trawler winches Main Features Coil body with coil : Thermal class 155, nitrocarburated and postoxidated Armature disc : Special protection: nitrocarburated and postoxidated Brake disc : Special protection: nitrocarburated and postoxidated Friction lining : Low wear rate with low torque fade over a high range of temperature. High thermal...

Electromagnetic Spring-Applied Brake ■/ Comprehensive torque range 63 - 11.000 Nm ■/ Operative without cover / Type approvals: GL, LRS, ABS, DNV, BV, RR (on request) ■/ Simple assembly to motor, no dismantling of brake required ■/ Compatibility of consumable spares ■/ Simple maintenance, one time wear re-adjustment by reversing of the brake disc ■/ Proven reliable design ■/ Sealed inspection holes for air gap or lining wear ■/ High heat dissipation ■/ Free from axial loads when braking and running ■/ Suitable for vertical mounting, please consult GKN Stromag Dessau GmbH ■/ Many optional...

Electromagnetic Spring-Applied Brake Designation of individual components 01 coil body 11 cover 02 friction disc with friction lining 32 armature disc 03 brake disc 33 coil 04 flange 34 compression spring Brake operation The brake 4 BZFM is a spring-loaded electromagnetic double-face brake which brakes without current The brake is screwed to a motor or any other machine part by means of cyl. screws via the flange (04). The coil body (01) contains a coil (33) which is potted with a synthetic resin compound in accordance with thermal class 155, (max. limit of temperature 155°C). If the coil...

Electromagnetic Spring-Applied Brake Optional availability, inboard proving switch, one common contact, one normally open contact and one normally closed contact. This can be interlocked with motor contactor for parking brake duty, i.e. brake release before starting Three standard versions: • Flying leads usually 1,5 meter long, axial with a cable bushing and radial through cable gland • IP 66 terminal box, for easy connection and removal, at execution with terminal box the brake complies with protection IP66! • Versions for AC supply with built-in full wave or half wave rectification...

Electromagnetic Spring-Applied Brake Table 1: technichal data * other voltages on request GKN Stromag Dessau GmbH 6 449-00004 Dessauer Strafie 10 Version: -

Electromagnetic Spring-Applied Brake thermal class switchable nominal torque at lm/s Mctional speed to DIN VDE 0580 (applies to dry operation with an oil- and grease-free friction lining after running-in) transmissible static nominal torque without slip, to DIN VDE 0580 (applies to dry operation with an oil- and grease-free friction lining after running-in) maximum idling speed admissible switching speed nominal braking capacity (S4-40 % I.O.) switch work per switching operation for z = 1 — 5/i_1 mass moment ol inertia ol rotating parts Table 2: table of dimensions (all dimensions in mm)...

Electromagnetic Spring-Applied Brake Optional Accessories GKN Stromag Dessau GmbH 8 449-00004 Dessauer Strafie 10 Version: -

Electromagnetic Spring-Applied Brake nominal voltage-' bore diameter with keyway-1 with quick switching unit- Figure 1: The diagram shows the time response of an electromagnetic spring - applied brake as defined by the VDE regulations GKN Stromag Dessau GmbH 9 449-00004 Dessauer StraBe 10 Version: -

4 BZFM Electromagnetic Spring-Applied Brake M1 = switchable torque [N m] The switchable (dynamic) torque is the torque which can be transmitted by a brake under slip condition depending on the friction coecient and at working temperature. (M1 = 0, 9MSN ) M3 = synchronization torque [N m] The synchronization torque is the torque which arises for a short time after nishing the switching process . MU = transmissible torque [N m] ¨ The transmissible (static) torque is the max. torque that can be applied to a brake without the risk of slipping. MSN = switchable nominal torque [N m] The...

Electromagnetic Spring-Applied Brake Friction surface Heat quantity Watt(W) Heat per hour - Specific heat Mass moment of inertia J [kgm2] The mass moment of inertia J stated in the formula is the total mass moment of inertia of all the masses to be retarded referred to the brake. Reduction of moments of inertia The reduction of moments of inertia is calculated from the formula Moments of inertia of linear masses The equivalent moment of inertia JETS for a linear mass m and a velocity v referred to the brake speed n is calculated from the formula Torque considerations for the brake The mean...

4 BZFM Electromagnetic Spring-Applied Brake When expressing the decelerating torque MA by means of the pulse principle, we obtain after corresponding conversion MA = J ∗ MSN = tA = dω dt [N m] J ∗n ± ML 9, 55 ∗ ta [N m] J ∗n 9, 55 ∗ (MSN ± ML ) [s] It is assumed that the dynamic torque is achieved instantaneously. Considerations of dissipated energy For all operations at speed with slip, dissipated energy is generated in the brake which is transformed into heat. The admissible amount of dissipated energy resp. power capacity must not be exceeded in order to avoid any inadmissible heating....

Electromagnetic Spring-Applied Brake Permissible heat capacity at 1500 rpm Figure 2: Heat capacity of series 4BZFM n = 1500rpm **. By known operations and number of operations per hour the brake size can be obtained. Example: Q =250k J/operation and z = 10 operations/hour Size 4BZFM 63 ** permissible switching operations per switching at other speed ratings on request GKN Stromag Dessau GmbH

Electromagnetic Spring-Applied Brake Questionaire to allow the determination of spring applied brakes GKN Stromag Dessau GmbH 14 449-00004 Dessauer StraBe 10 Version: -