Design Optimization of the Rigid Drive Disc of Clutch


Technical Report, 2014

6 Pages


Excerpt

Design Optimization of the Rigid Drive Disc of Clutch

Oday Ibraheem Abdullah

Technische Universität Hamburg-Harburg

Abstract: The new direction of development of the automotive vehicle ride comfort and driving smoothness is associated with the advancement of the machine parts design, e.g., torsional dampers on friction clutch are considered as essential parts to maintain engine torque peaks as well as operational irregularities and reduce them in a way that is consistent with the comfort and robustness purposes. Figure 1 shows different types of design for the clutch plate for passenger cars and commercial vehicles [1].

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1. Introduction

A popularly application for the clutch is in automotive vehicles where it is used to connect the engine and the gearbox, and used also extensively in production machinery of all types. The new direction of development of the automotive vehicle ride comfort and driving smoothness is associated with the advancement of the machine parts design, e.g., rigid drive disc of clutch is considered as essential part to transfer torque from the driver to driven in a way that is consistent with the comfort and robustness purposes [[2] [3] [4]].

Naunheimer and Bertha [1] presented the design procedures for the friction clutch, and the parameters that effect on the clutch performance. Also, they present different type of design for the clutch plate for passenger cars (Fig. 1 a–c) and commercial vehicles (Fig. 1. d–e).

There are many companies produce the rigid clutch plate passenger cars (Fig. 1.c) such as LUK Limited Liability Corporation [5] and ZF SACHS Race Engineering Limited Liability Corporation [6].

The failures of the rigid drive disc of clutch has been investigated using finite element method. Three-dimensional model have been used to obtain the stress and deformations [[7] & [8]].

In this research, a numerical technique is used to simulate new models for rigid disc drive of friction clutch. Shape optimizations of the proposed models are performed to improve the dynamic characteristics of the system and hence the absorption of shocks that occur during clutch engagement. The finite element method has been used to compute the stresses and deformations during the steady-state period, and the vibration characteristics of the rigid disc drives of clutch.

2. Mathematical Models

Figure 2 shows the different patterns of the drive discs of clutch; the model (1) assumed the reference model and the suggested models are models (2, 3, 4 & 5). All suggested model have approximately the same mass (≈ 205g).

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In all computations for the rigid clutch disc models, it has been assumed a homogeneous and isotropic material and all parameters and materials properties. The first step in this work is to find the stresses and displacements for the suggested models for the rigid clutch disc. SolidWorks 2012 has been used to obtain the numerical simulation for the suggested models in this step. The results from the first step of simulation proved that the values of the stresses for the models (3 & 4) are lower than the stresses for models (2 & 5). Due to these results, the models (3 & 4) have been selected for the design optimization process to obtain the optimal design parameters of the rigid clutch disc. Figures 3 and 4 show the design parameters for the suggested models (3 & 4).

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The second step in this analysis finds the values of the suggested design parameters using the optimization process. Figures 5 and 6 illustrate the Von-Misses stresses for the models (3 & 4) using the final design parameters which found during the optimization process. Figures 7 and 8 show the clutch discs using the optimized rigid drive disc of the models (3 & 4) when assembly with other parts (rivets, axial cushion and the friction lining).

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From the comparison between the results of the Von- Mises for the suggested models (3 & 4) and the reference model (1), it can be concluded that the model (3) improves the trend by reduce the maximum stresses with 93% when increase the mass with 10% only. In the other hand, model (4) has better tensional elasticity (absorb the shocks and the vibration) compared to the model (3). The present simulation is a preliminary of subsequent investigation to study suggested models for the rigid clutch disc experimentally.

[...]


1 VDI guideline 2241, Part 1: Friction Clutches and Brakes, Vocabulary, Types, Characteristic Data, Calculations, Verein Deutscher Ingenieure (VDI), Düsseldorf, 1982.

2 O. Dittrich, R. Schumann: Anwendungen der Antriebstechnik, Band 2: Kupplungen, Krausskopf-Verlag, Mainz, 1974.

3 S. Sfarni, M. Malley: Numerical Modeling of Automotive Riveted Clutch Disc for Contact Pressure Verification, Scandinavian Simulation Society, In: 49th Scandinavian Conference on Simulation and Modeling, Oslo, 2008.

4 H. Naunheimer, B. Bertche: Fahrzeuggetriebe– Grundlagen, Auswahl, Auslegung und Konstruktion, Springer-Verlag, Berlin, 2007.

5 LUK-Kupplungen: Einführung in die Kupplungstechnik für Personen-Kraftwagen, Veröffentlichte Broschüre, Schaeffler Automotive Aftermarket GmbH, Bühl (Germany), 2012.

6 SACHS Kupplungen: Performance-Kupplungssysteme, Lieferprogramm 2008, Veröffentlichte Broschüre, ZF SACHS Race Engineering GmbH, Schweinfurt (Germany), 2008.

7 M. Hazwan: Design and Analysis of a Lightweight Clutch Disc for a Single Seated Race Car, Bachelor thesis, Faculty of Mechanical Engineering, Melaka University of Technology, Malaysia, 2011.

8 M. Ibnor: Design and Analysis of a Lightweight Clutch Disc for a Mini Farming Tractor, Bachelor thesis, Faculty of Mechanical Engineering, Melaka University of Technology, Malaysia, 2011.

Excerpt out of 6 pages

Details

Title
Design Optimization of the Rigid Drive Disc of Clutch
Author
Year
2014
Pages
6
Catalog Number
V281959
ISBN (eBook)
9783656769330
File size
1083 KB
Language
English
Tags
design, optimization, rigid, drive, disc, clutch
Quote paper
M. SC Oday Ibraheem Abdullah (Author), 2014, Design Optimization of the Rigid Drive Disc of Clutch, Munich, GRIN Verlag, https://www.grin.com/document/281959

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