Romax Designer Single Product Model for Transmission Design

Romax. Designer Single Product Model for Transmission Design & Analysis

About this Presentation n Aims of the presentation n Modelling the components: • shafts • bearings • gears n Assembling the gearbox n Defining the loads and powers n Running the analysis n Review of the results and further Romax. Designer capabilities Copyright © Romax Technology Limited 2000 - 2005

Introduction Aims of this presentation are to show how: n To model an existing transmission in just one day n To analyze the model for shaft, bearing and gear performance and life n To use the analysis results to optimize an existing design Copyright © Romax Technology Limited 2000 - 2005

Modelling the Transmission Key Stages for Creating a Romax. Designer Model n Definition of components n Mounting the gears on to shafts n Definition of gearbox internal geometry n Powerflow definition and analysis n Review of results n Options for further analysis and optimization Copyright © Romax Technology Limited 2000 - 2005

Modelling the Transmission Romax. Designer Modelling stages: n Definition of components n Mounting the gears on to shafts n Definition of gearbox internal geometry n Powerflow definition and analysis n Review of results n Options for further analysis and optimization Copyright © Romax Technology Limited 2000 - 2005

Modelling the Transmission n The user need only input the geometry n Romax. Designer will generate static and dynamic models from this data instantaneously Copyright © Romax Technology Limited 2000 - 2005

Modelling the Transmission n Romax. Designer has complete bearing database catalogues for SKF and FAG to choose from - as well as a Custom specification option: Copyright © Romax Technology Limited 2000 - 2005

Modelling the Transmission n Every bearing is a fully specified engineering object ready for analysis: Virtual Component has : - Dimensions - Engineering Properties Copyright © Romax Technology Limited 2000 - 2005

Modelling the Transmission To add gear pairs there are two options for defining gear geometry: n Concept gear pair • Basic gear data required for the calculation of forces on the shafts and bearings n Detailed gear pair • Requires additional macro-geometry data for gear rating Copyright © Romax Technology Limited 2000 - 2005

Modelling the Transmission Romax. Designer Modelling Areas: n Definition of components n Mounting the gears on to shafts n Definition of gearbox internal geometry n Powerflow definition and analysis n Review of results n Options for further analysis and optimization Copyright © Romax Technology Limited 2000 - 2005

Modelling Overview Gear mounting definition There are four options for defining gear mounting in the model: n Integral with shaft • The gear is manufactured into the shaft n Rigidly mounted to shaft • The gear is permanently attached to the shaft n Synchronizer or clutch connection • The gear is free to rotate on the shaft unless the synchroniser/clutch is engaged n Free Rotation • The gear is free to rotate on the shaft Copyright © Romax Technology Limited 2000 - 2005

Modelling the Transmission Romax. Designer Modelling Areas: n Definition of components n Mounting the gears on to shafts n Definition of gearbox internal geometry n Powerflow definition and analysis n Review of results n Options for further analysis and optimization Copyright © Romax Technology Limited 2000 - 2005

Review of Results n Romax. Designer calculates complete duty cycle results, in under a minute, on a standard PC n The results for each load case include: • Forces, moments, displacements and stresses for all shafts • Deflections, tilts and displacements on all bearings • Mesh misalignment for all gear meshes • Life rating for all bearings and gears including misalignment effects Copyright © Romax Technology Limited 2000 - 2005

Review of Results n The results for a single load case will be examined first: • Shaft loadings and deflections leading to bearing rating and gear mesh misalignment n Then the cumulative effect of the duty cycle will be shown n This gives a final assessment of gear and bearing performance for the specified duty cycle Copyright © Romax Technology Limited 2000 - 2005

Duty Cycle Results n For each component, the duty cycle result includes a contribution from each load case:

Modelling the Transmission Romax. Designer Modelling Areas: n Definition of components n Mounting the gears on to shafts n Definition of gearbox internal geometry n Powerflow definition and analysis n Review of results n Options for further analysis and optimization Copyright © Romax Technology Limited 2000 - 2005

Further Analysis (i) Examples of additional work possible using the Romax. Designer software: n The influence of Housing Stiffness on the system deflections n The misalignment of synchronized gears mounted on needle roller bearings n Stress concentration factors and shaft fatigue analysis. Copyright © Romax Technology Limited 2000 - 2005

Further Analysis (ii) Examples of additional work possible using the Romax. Designer software: n A more detailed duty cycle, e. g. for different driving styles and conditions n Gear micro-geometry definition and transmission error calculation n Synchronizer sizing and simulation. Copyright © Romax Technology Limited 2000 - 2005

Further Analysis (iii) Examples of additional work possible using the Romax. Designer software: n Driveline dynamic analysis and NVH n Perpendicular shafts, hypoid, spiroid and bevel gears n In-depth analysis of bearings. Copyright © Romax Technology Limited 2000 - 2005

Conclusions Romax. Designer allows: n Modelling of a complete gearbox … in less than 1 day n Duty cycle analysis of a gearbox … in under 1 minute n World-leading analysis in an easy-to-use interface n This speed-of-use allows rapid iterative design optimization for the first time Copyright © Romax Technology Limited 2000 - 2005

Your Next Step! Thank you for reviewing Romax. Designer. You may now wish to: Start using Romax. Designer Take one of the Romax in-depth training courses on transmissions, or gear design using Romax. Designer (email us - see next slide) Contact Romax for more details on Romax software solutions (see next slide) Copyright © Romax Technology Limited 2000 - 2005

For more information contact: Romax Technology Limited Rutherford House Nottingham Science and Technology Park Nottingham England, NG 7 2 PZ Tel: +44 (0)115 951 8800 Fax: +44 (0)115 951 8801 e-mail: info@romaxtech. com http: //www. romaxtech. com