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Analytical Models for Spring One-Way Clutch and Torsional Vibration Dampening Systems with Experimental Correlation
Technical Paper
2017-36-0407
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Among the alternatives for solving NVH (Noise, Vibration and Harshness) problems in automobiles, the alternator pulley has become one of the most promising alternatives in the Frond-End Accessory Drive (FEAD) of modern engines. The rigid pulley has evolved from a simple device whose only function is torque transmission to a system with much more complex functions. At this higher level of complexity, many innovative designs have been created, such as pulleys with overrunning function and pulleys with both One-Way Clutch (OWC) and vibration dampening functions, which are devices that require a high level of study in order to guarantee an adequate design of the system for each new application. This paper presents the steps taken in dimensioning two distinct types of springs: a clutch spring and a torsion spring, to be applied in alternator pulleys with OWC and vibration dampening systems. The method begins with preliminary dimensioning of the springs using analytic formulae, and then comparing these results to FE simulation and experimental tests of prototype pulleys. Known analytic equations for torsion spring dimensioning showed good coherence with experimental and Finite Element modeling results. However, existing analytic expressions for clutch springs were not representative of the FEA or test bench results, requiring new empirical formulation in order to obtain the desired correlation to the prototype and FEA results. An overall correlation of approximately 95% is obtained for the torque transmission capacity of the clutch spring. As for the torsion spring, the correlation was of 80% for its torsional stiffness, and of 90% for its angular deflection when limited by a given diameter.
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Pastorelli, P., Michelotti, A., Ferreira, A., and Berto, L., "Analytical Models for Spring One-Way Clutch and Torsional Vibration Dampening Systems with Experimental Correlation," SAE Technical Paper 2017-36-0407, 2017, https://doi.org/10.4271/2017-36-0407.Data Sets - Support Documents
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References
- Novo , F. , Moraes de Souza , M. , Savoy , J. , and Silva , M. Analysis of the Vibration Modes of an Automotive Propeller Shaft using FEM and Analytical Models SAE Technical Paper 2012-36-0224 2012 10.4271/2012-36-0224
- Michelotti , A. et al. Future trends in the conceptual design of alternator pulleys SAE Technical Paper 2012-36-0226
- Michelotti , A.C. ZEN S/A Industria Metalurgica, Assignee. Decoupler with free wheel system and vibration damping and one-way clutch with free wheel system US Patent nr 9,605,743 B2 Mar. 28 2017
- Chesney , D. , Kremer , J. Generalized Equations for Roller One-Way Clutch Analysis and Design SAE Technical Paper 970682 1997
- Chesney , D. ; Kremer , J. Generalized Equations for Sprag One-Way Clutch Analysis and Design SAE Technical Paper 981092 1998
- Kish , J. Helicopter Freewheel Unit Design Guide. United Technologies Corp., Stratford CT Sikorsky Aircraft Div. 1977
- Paza , A. Project and experimental validation of a Wrap spring Clutch SAE Technical Paper 2013-36-0358 2013
- King , R. and Monahan , R. Alternator Pulley with Integral Overrunning Clutch for Reduction of Belt Noise SAE Technical Paper 1999-01-0643 1999 10.4271/1999-01-0643
- Sclater , N. , and Chironis , N. Mechanisms and Mechanical Devices Sourcebook 206 208 New York McGraw-Hill 2007
- Yang , E. Pacific Scientific Company, Assignee. Capstan spring centrifugal clutch European Patent Application EP0153079 Aug 28 th 1985
- Budynas , R. and Nisbett , K. Shigley’s Mechanical Engineering Design Eighth New York McGraw-Hill 2006
- MITCalc Spring Documentation http://www.mitcalc.com/doc/springs/help/en/springs.htm
- Tiwari , R. Analysis and Identification in Rotor-Bearing Systems 272 360 Indian Institute of Technology Guwahati Guwahati, India 2010
- Kaz Technologies 2017 Transmissibility. Image June 1 http://www.kaztechnologies.com/faq/