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Catalog Pole-face friction clutches and Brakes

Catalog Pole-face friction clutches and Brakes
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Catalog Pole-face friction clutches and Brakes

Product catalog summary
General Information
This document provides updated specifications and guidelines for Stromag's Pole Face Friction Clutches and Brakes, replacing all previous editions. It includes essential information on the functioning, specifications, and applications of these components.
Functioning of 4-Pole Pole Face Friction Clutch
The clutch operates electromagnetically without a slip ring, featuring four pole faces made from low-residual magnetism material. It is designed for dry operation, with torque ratings applicable to the run-in condition. The clutch ensures quick switching times and backlash-free torque transmission.
Important Nomenclature for Clutches
The document defines key torque terms: Transmissible Torque (TÜ), Switchable Torque (TS), Switchable Rated Torque (TSN), and Load Torque (TL).
Operation Times
Switching times are detailed, including Time Delay (t11), Torque Build-up Time (t12), Switching Time (t1), and De-energize Time (t2).
Mass Moment of Inertia (J)
The document explains the calculation of the mass moment of inertia for both rotational and linear masses, emphasizing the importance of considering shock and peak loads when determining clutch sizes.
Specifications and Data Sheets
The document includes detailed specifications and data sheets for various types of clutches and brakes, such as 4-pole clutches (MFT and MWU types) and brakes (MWU-B and MFK types).
Applications and Recommendations
Guidelines for construction and practical applications are provided, along with examples of assembly and execution. A questionnaire assists in determining suitable clutches and brakes for specific applications.
Specifications and Calculations
The document provides formulas for calculating dynamic rated torque (TSN) and accelerating torque (TA) for clutches and brakes. It emphasizes the importance of considering load torque direction and provides equations for calculating torque and switching work.
Design and Operational Considerations
Key considerations include selecting the clutch size based on torque and switching work, ensuring minimal radial and axial deviation during assembly, and maintaining a minimum distance of 5 mm from surrounding constructions.
Applications and Characteristics
The clutches are suitable for various applications, including agricultural machinery, utility vehicles, and textile machines. They feature small dimensions, short operation times, nitrated surfaces, and good heat dissipation.
Operation and Maintenance
Clutches are actuated by electrical current and feature no idle-run torque. They require low maintenance and are generally designed for dry operation, although some series allow for wet operation.
Technical Data and Performance
The document includes tables with technical data such as torque ratings, maximum speed, mass moment of inertia, and engagement/disengagement times for different clutch sizes.
Construction Details
Details on the construction of the clutches, including dimensions and keyway specifications, are provided.
Specifications
The document provides detailed specifications for the MFT and MWU series of pole face friction clutches and brakes by Stromag Dessau.
Procedures
The document outlines how to determine the appropriate clutch size based on known switching operations and the number of operations per hour.
Standards
Keyways for keys are specified according to DIN 6885 sheet 1, ensuring compatibility and standardization in mechanical connections.
Recommendations
For higher speed ratings than those listed, it is recommended to contact the manufacturer for specific inquiries.
Examples of Execution
The document includes examples of different configurations and applications of the MWU series clutches.
Key Data from Tables and Graphs
The tables provide detailed data on torque, speed, mass moment of inertia, and power consumption for different clutch sizes.
Critical Information
Important details include the nominal torque and voltage for each model, as well as the permissible heat capacity and engagement/disengagement times.
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Catalog excerpts

Catalog Pole-face friction clutches and Brakes-1

Pole face friction clutches

 Open the catalog to page 1
Catalog Pole-face friction clutches and Brakes-2

Datum: 03/2011 Stromag Dessau GmbH Dessauer Str. 10 06844 Dessau-Roßlau Tel.: +49 (340) 2190-0 Fax: +49 (340) 2190-201 E-Mail: [email protected] Internet: http://www.stromag-dessau.de Stromag AG Hansastr. 120 59425 Unna Tel.: +49 (2303) 102-0 Fax: +49 (2303) 102-201 E-Mail: [email protected] Internet: http://www.stromag.com

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Catalog Pole-face friction clutches and Brakes-3

Stromag Dessau Polreibungskupplungen und –bremsen Pole Face Friction Clutches and Brakes safety in motion Alle Angaben über Polreibungskupplungen und –bremsen in Druckschriften älteren Datums sind mit dem Erscheinen dieser Druckschrift nur noch bedingt gültig. Maß- und Konstruktionsänderungen behalten wir uns vor. This catalogue for Pole Face Friction Clutches and Brakes cancels and replaces all former editions. We reserve the right to modify the dimensions and constructions. Inhalt Content Seite Allgemeine Hinweise Wirkungsweise einer 4-poligen Polreibungskupplung Wichtige Kenngrößen von Schaltkupplungen...

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Catalog Pole-face friction clutches and Brakes-4

Stromag Dessau Polreibungskupplungen und –bremsen Pole Face Friction Clutches and Brakes safety in motion Wirkungsweise einer 4-poligen Polreibungskupplung Functioning of 4 pole pole face friction clutch Die schleifringlose, elektromagnetisch geschaltete Polreibungskupplung ist eine Reibungskupplung mit 4 Polflächen aus weichmagnetischem Werkstoff. Durch eine entsprechende Oberflächenbehandlung sind die Reibpartner -Ankerscheibe/Rotor- sehr verschleißfest. Die Angaben zum Drehmoment setzen 'Trockenlauf' voraus und gelten für den eingelaufenen Zustand. Im 'Nasslauf' werden ca. 25% der Angaben...

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Catalog Pole-face friction clutches and Brakes-5

Stromag Dessau Polreibungskupplungen und –bremsen Pole Face Friction Clutches and Brakes safety in motion Important nomenclature for clutches U[V] Wichtige Kenngrößen von Schaltkupplungen Schaltbefehl, z. B. Spannung Command, e.g. voltage ein on aus off aus off I[A] t [ ms ] Schaltbefehl, z. B. Strom Command, e.g. current t [ ms ] T [ Nm ] TÜ TS TL TSN 0,1*TSN TR Drehmoment Torque TR t1 n [ min-1 ] Abtriebsdrehzahl Driven speed t [ ms ] t 12 t 11 t2 n 2 = n1 n2 = 0 t 13 n2 = 0 t 14 t [ ms ] In der oben stehenden Abbildung ist der Einschaltvorgang einer Elektromagnet-Schaltkupplung in Abhängigkeit...

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Catalog Pole-face friction clutches and Brakes-6

Stromag Dessau Polreibungskupplungen und –bremsen Pole Face Friction Clutches and Brakes safety in motion TR = Leerlaufdrehmoment (Restdrehmoment) Das Leerlaufdrehmoment ist das Drehmoment, das die Kupplung im betriebswarmen Zustand nach dem Ausschalten überträgt. TR = No-load torque (drag torque) The no-load torque is the torque which the clutch transmits at working temperature after disengagement. TA = Beschleunigungsdrehmoment Das Beschleunigungsdrehmoment ergibt sich aus der Differenz von schaltbarem Drehmoment und Lastdrehmoment. TA = Accelerating torque The accelerating torque results from...

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Catalog Pole-face friction clutches and Brakes-7

Stromag Dessau Polreibungskupplungen und –bremsen Pole Face Friction Clutches and Brakes safety in motion Das Massenträgheitsmoment J The Mass Moment of lnertia J Das in den Formeln angegebene Massenträgheitsmoment J ist das gesamte, auf die Drehzahl der Kupplung bezogene Massenträgheitsmoment, aller von der Kupplung zu beschleunigenden bzw. von der Bremse zu verzögernden Massen. The mass moment of inertia J stated in the formula is the total mass moment of inertia of all the masses to be accelerated or retarded referred to the clutch or brake response. Reduzierung von Trägheitsmomenten: Für...

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Catalog Pole-face friction clutches and Brakes-8

Stromag Dessau Polreibungskupplungen und –bremsen Pole Face Friction Clutches and Brakes safety in motion Auslegung nach der Schaltarbeit Considerations of dissipated energy Bei allen Schaltvorgängen unter Relativdrehzahl bzw. bei Rutschvorgängen während des Betriebes wird in einer Kupplung Schaltarbeit erzeugt, die in Wärme umgesetzt wird. Die zulässige Schaltarbeit bzw. Schaltleistung darf nicht überschritten werden, damit keine unzulässige Erwärmung auftritt. Eine Auswahl der Größe einer Schaltkupplung nach den auftretenden Drehmomenten ist nur in sehr wenigen Fällen ausreichend. Deshalb muss...

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Catalog Pole-face friction clutches and Brakes-9

Stromag Dessau Polreibungskupplungen und –bremsen Pole Face Friction Clutches and Brakes safety in motion Einsatzgebiete Allgemeiner Maschinenbau, besonders geeignet für die Zuschaltung von Nebenaggregaten in Landmaschinen, Kommunalfahrzeugen und Textilmaschinen, für Kompressorantriebe bei Kühlaggregaten, Zusatzaggregate in Kraftfahrzeugen, Wäschereimaschinen, Prüfstände und PTO-Antriebe. Type of Application General machine manufacture, especially suitable for the actuation of auxiliary power generating sets in agricultural machinery, council utility vehicles and textile machines, for compressor...

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Catalog Pole-face friction clutches and Brakes-11

Stromag Dessau Polreibungskupplungen und –bremsen Pole Face Friction Clutches and Brakes safety in motion Mitnehmernabe für Baureihe MFT Driving hub for series MFT Ankerteil und Mitnehmernabe Armature and driving hub Nuten für Passfedern nach DIN 6885 Bl.1 Längen mm Lengths Durchmesser mm diameters Größe / Size Keyways for keys to DIN 6885 sheet 1 MFT 0,6 MFT 1,3 MFT 2,5 b2 c1 e2max 29 55 20 38 70 30 50 90 40 p p1 15 4 20 5 MFT 5 25 6 MFT 20 MFT 40 MFT 80 65 115 50 85 145 60 105 185 80 135 230 100 220 290 120 30 7 9 MFT 10 38 9 48 11 55 13 65 17

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Catalog Pole-face friction clutches and Brakes-12

Stromag Dessau Polreibungskupplungen und –bremsen Pole Face Friction Clutches and Brakes safety in motion Drehmomentverlauf der Polreibungskupplung MFT in Abhängigkeit von der Relativdrehzahl Torque characteristic of the pole face friction clutch MFT in relation to the slip speed Reibpaarung: Stahl/Stahl; Reibzeit ≤ 1 sek. Friction combination: steel/steel; slipping time ≤ 1 sec. Drehmoment / Torque M in Nm 10000 1000 MFT 80 100 MFT 40 MFT 20 MFT 10 MFT 5 10 MFT 2,5 MFT 1,3 MFT 0,6 1 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 Relativdrehzahl / slip speed nrel in min-1 10

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