2013.08 cvs riemenantriebssysteme english...torsional angle: 25 the innovative damper solution for...
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Belt-drive Systems
Belt-drive Systems
General Information
Kendrion LINNIG belt-drive systemsA look under the engine hood of your bus or coach will reveal several Kendrion LINNIG components in the areas of engine cooling, air conditioning and belt management. For decades, the long-established company - headquartered in Markdorf near Lake Constance - has been the brand name for intelligent system
solutions in drive technology. Thanks to innovative research and development, we respond swiftly to the latest trends in the com-mercial vehicle industry and are a proven reliable partner to our customers.
From the crankshaft to the auxiliary units – Kendrion ensures smooth running!Many years of experience have shown that diesel engines run un-evenly - especially in the lower speed range - causing high levels of vibration at the crankshaft. These vibrations are transmitted via the drive belts to the auxiliary units, such as the A/C compressor and the fan drive. The consequences hereof are noise emissi-ons, wear and fastening problems as well as increased energy
consumption. This is where Kendrion LINNIG‘s drive-belt system comes in: It provides for smooth-running in the engine compart-ment, while increasing the service life of the auxiliary units and improving the energy balance. Advantages that will continue to play a decisive role in the future.
More stringent exhaust emission standards demand belt management – We have the solution!Belt management will be facing major challenges in a variety of applications. The vibration problem is further intensified through modified combustion processes, higher torques and power out-puts, the reduction of centrifugal masses, as well as through in-creasingly stringent emissions standards. The engines run with increased injection pressure and can thus tend to greater irre-gularities. The use of a dual-mass flywheel is often not sufficient here. Increased vibration behavior still occurs, possibly leading to
the above mentioned wear and noise problems as well as increa-sed energy consumption.
Not, however, with Kendrion Linnig products. State-of-the-art technology provides for quiet running in the engine compartment. By deploying deflection and tension rollers, with or without dam-ping function, as well as the torsional vibration damper, belt-ma-nagement systems are tailored to customer requirements.
A system matching your engine compartment is readily available. Feel free to contact us!
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Kendrion LINNIG‘s torsional vibration damper
A new dimensions of quiet-running – Through damped belt drives
The applicational advantages at a glance ■ Practically vibration-free belt run ■ Strongly reduced transfer of vibrations to the vehicle structure,
auxiliary units, belt-tensioning elements and attachment parts ■ Increased effi ciency through extended service life of belts and
auxiliary units
■ Application-specifi c adjustable damping curve ■ Wear-free damping stage through permanent magnets ■ Simple assembly by replacement of the present pulley
package ■ Easy to service
Description Tried-and-tested system, proven for years and characterized through reliability.
Applications For driving A/C compressors and alternators
Technical Specifi cations Torque: Up to 200 NmTorsional angle: 6-7°
The classic damper for use on crankshafts – LDD29
Description Through a larger torsional angle, vibrations as well as torque and force peaks are reduced or eliminated, even in extreme situations.
Applications For driving A/C compressors, alternators and fan drives
Technical Specifi cations Torque: Up to 170 NmTorsional angle: Up to 11°
The fl exible damper for use on crankshafts – LDD48
Belt wobbling without torsional vibration damper Vibration-free belt run with torsional vibration damper
Description Decouples smaller, uniformly-running auxiliary units, while enabling very large torsional angles.
Applications For driving alternators
Technical Specifi cations Torque: 30 NmTorsional angle: 25°
The innovative damper solution for use on alternators – LDD80
Belt-drive Systems
The advantages are obviousThe benefi ts that result from this consistent vibration reduction are obvious: Noise is minimized and all transferring components are gone easy on, so that their service life is considerably prolonged.
As the spring system itself does not take up energy, an advantage arises in the energy balance when compared to other damping systems, such as rubber ones, which heat up in operation.
Operation of the Kendrion LINNIG torsional vibration damper:
Kendrion LINNIG‘s torsional vibration damper, which operates on the basis of permanent-magnet technology, can signifi cantly red-uce drive-train vibrations.
The torsional vibration damper ensures double damping of the crankshaft pulley, based on the following two features:
■ Permanent magnets cause a smooth damping function when transferring low to medium-range torque.
■ Special rubber dampers are used as the stop for full power transfer of maximum torques.
In this manner, Kendrion LINNIG‘s technology meets the demand of ensuring optimal vibration reduction at any speed.eine optima-le Schwingungsreduzierung bei jeder Drehzahl zu gewährleisten.
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The fi gure above clearly reveals: Despite signifi cantly initiated oscil-lations, the derived torque is almost constant. The rotational imba-lance of the crankshaft is absorbed.
The characteristic curve can be fl exibly adapted to individual custo-mer requirements, depending on the number and arrangement of the magnets.
This allows for different specialty maneuvers to be enabled at which the high load peaks can be absorbed, such as the start-stop func-tion, engagement of auxiliary units at high drive speeds or when stalling the engine. In this manner, the service life of auxiliary units can be considerably prolonged.
Rubber damper transmits high torque peeks
Magnetic system
Example of a magnet curve from torque over torsional angle
Torq
ue in
Nm
Torsional angle in °
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The unique characteristic: Wear-free operationThe decisive unique characteristic is a result of the properties of a permanent-magnet system: Contact-free power or load trans-
mission means wear-free operation, so that Kendrion LINNIG‘s system will not be outdone in terms of service life.
Flexible installation and customer-specific solutions – The optimal system for any applicational caseThanks to its flexible installation, the torsional vibration damper can be used for a variety of arrangements in the engine com-partment: Kendrion LINNIG‘s system can be installed both on the crankshaft as well as in the drive train. The solution is available either as a pure torsional vibration damper for up to three belt levels, or, as additional functionality on an idler with integrated damper. Here, different belt profiles can be used, such as the
classic SPB V-belt or the poly V-belt. The desired characteristics are adapted to the respective application, depending on customer situation. After dimensioning and designing the torsional vibration damper, it is tested in the vehicle in order to check the properties in detail. The required characteristic curve is temperature-inde-pendent, which underlines the reliability of the system.
Ready for a retrofit? No problem!Even when retrofitting existing fleets, Kendrion LINNIG torsional vibration dampers provide a convincing and practical solution, as the installation is very simple: The present pulley package can
be replaced as a complete unit – with the immediate result of quiet-running.
Feel free to contact us! We‘ll gladly provide for smooth-running in your engine compartment!
Belt-drive Systems
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Idlers and defl ection rollers from Kendrion LINNIG
Kendrion LINNIG‘s idlers and defl ection rollers are characte-rized through robust design and high fl exibility. Depending on
the application, completely varying diameters and circumfe-rential speeds are possible. Feel free to contact us!
The applicational advantages at a glance: ■ Optimization of the power transfer ■ Quiet belt run
■ Reduced belt wear, resulting in prolonged belt service life ■ Innovative bearing technology
Applications Buses/coaches, trucks and special vehicles
Allowable ambient temperature
- 30 °C to +110°C (optionally down to -50°C)
Allowable radial forces 2,500 N
Max. allowable radial forces (short-term) during starting/stopping
2,900 N
Max. allowable speed (short-term)
6,000-7,000 rpm
Der classic: The SPR0040 idler and defection roller
The high-speed solution with innovative bearing technology: The SPR0100 defl ection roller
Applications Buses/coaches, trucks and special vehicles
Allowable ambient temperature
-30°C to +110°C (optionally down to -50°C)
Allowable radial forces 3,000 N
Max. allowable radial forces (short-term) during starting/stopping
4,000 N
Max. allowable speed (short-term)
10,000 rpm
Applications Fan drives
Allowable ambient temperature -30°C to +110°C (optionally down to -50°C)
Max. input speed 3,000 rpm
Max. torque M = 200 Nm
The all-rounder: The SPR0099 idler with integrated damper
Interested in Other Areas of the Kendrion LINNIG Portfolio?
The Kendrion LINNIG Product Portfolio
a Electromagnetic Fan Clutches b Angle Gears c A/C Compressor Clutches d Electromagnetic Clutches for Auxiliary Units e Pneumatic Clutches
f Hydraulic Clutches g Shutting-speed Regulatorsh Torsional Vibration Dampersi Clutches for Special Applicationsj Tensioning and Defl ection Rollers
For more information, please log on to www.kendrion.com
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Overview of Kendrion LINNIG Industries
01 Busses/Coaches 02 Trucks03 Off Highway04 Fire-prevention Technology 05 General Mechanical Engineering
06 Rail Vehicles 07 Municipal Vehicles 08 Agricultural Engineering09 Construction Machinery10 Industrial Engines
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Service is not a task for us, it‘s a part of doing good business. After delivery and installation, Kendrion LINNIG customers will certainly not be left alone. Our qualified personnel will gladly an-swer any technical questions.
Expect swift and competent service over our hotline:
+49 7544 964-122.
Kendrion Commercial Vehicle Systems – Global Production Sites and Sales LocationsKendrion LINNIG GmbHCommercial Vehicle SystemsRiedheimer Strasse 588677 MarkdorfGermany
Phone: +49 7544 964-0Fax: +49 7544 [email protected]
Kendrion LINNIG India Pvt. Ltd.Klaus Union CampusGat no 1197Near Ghotawade Phata, Village PirangutTaluka Mulshi, Dist Pune 412 108India
Kendrion (São Paulo) Sistemas Automotivos Ltda.R. Silvério Finamore, 920Cond. Industrial, Galpão 0313290-000 Louveira, S.P.Brazil
Phone: +55 19 3848 [email protected]
LINNIG de Mexico, SA de CVCamino a Ocotitlan No. 110Col. La EstaciónMexicaltzingo, Toluca, Edo. de México, 52180Mexico
Phone: +52 (722) 263 2735Fax: +52 (722) 263 [email protected]
Kendrion Linnig Drive Tech. (Nanjing) Co. Ltd.Qi Xia Economic Development Zone,Runhua Road 14#210034 NanjingChina
Phone: +86 25 83318982Fax: +86 25 [email protected]
Kendrion (Shelby) Inc.1100 Airport RoadShelby, NC 28150-3699USA
Phone: +1 704 482 9582Fax: +1 704 481 [email protected]