Gear Technology
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Advanced root stress analysis for thin-rimmed gears
Advanced Finite Element numerical analysis tool for assessing gear bending strength released in R17 has now been further extended to include additional capability and enhancements.
- Advanced Finite Element gear root stress analysis
- Improved meshing of root stress model resulting faster solve time without compromising on accuracy.
- Accounting for gear rim distortion, specifically for thin rim gears or highly loaded gears
- New Multi mesh root stress analysis capability
- Inclusion of Thermal expansion and Centrifugal effects on root stress
- Automation and optimisation of gear geometry and root stress mesh now possible with Design of Experiments and Batch process
- Gears can now be specified as being milled (non generated) allowing greater flexibility over root geometry
- No third-party Finite Element tools or expertise required
- Suitable for analysis of internal and external parallel gears
Romax Gleason Data Exchange Interface
Data exchange between RomaxDESIGNER and Gleason GEMS enhances the design process by leveraging the strength of full drivetrain system analysis in RomaxDESIGNER and GEMS’ detailed analysis of bevel and hypoid gears, ultimately leading to increased durability, efficiency and improved NVH characteristics.
- Bevel and hypoid gear geometry from GEMS can be imported into RomaxDESIGNER
- Load case data and accurate predictions of misalignments from RomaxDESIGNER can be imported into GEMS to be used in the detailed contact analysis
- Transmission error and stress results from GEMS can be loaded into RomaxDESIGNER for viewing and for use in the NVH analysis
- The accurate misalignment information from RomaxDESIGNER allows for better and more detailed optimisation of gears in Gleason GEMS for increased durability and efficiency
- The transmission error calculated in GEMS can be used as an excitation in RomaxDESIGNER, enhancing the accuracy of NVH predictions
Combined shear stress plot for gear contact
Consider the effects of friction forces on subsurface stress during gear contact – an important result for selecting appropriate surface treatment and lubricant additives
- Takes into consideration of slip velocity, lubrication condition, surface roughness, oil dynamic viscosity to predict “combined” shear stress for gears
- Improve in accuracy of prediction of shear stress magnitude and depth
- Additional subsurface shear stress plots that account for friction forces
Improved gear design workflow including tolerances and asymmetric gears
A streamlined interface for loading and concept level helical gears, allowing the definition of concept level asymmetric gears and a comprehensive gear design and rating approach for detailed gears considering manufacturing tolerances
- Consistent interface across loading and concept spur, helical, worm, bevel, hypoid, beveloid, face gears in RomaxDESIGNER and all gears in CONCEPT
- Concept level spur of helical gear sets can have different pressure angles on different flanks of each tooth
- The effect of asymmetric teeth can be observed on mesh misalignment, resulting gear forces and bearing and housing reaction forces
- Detailed gear tolerances can be specified in RomaxDESIGNER and CONCEPT, allowing more control over specifying the tooth thickness tolerance and the conditions used in the analysis
- The tolerancing definition can be used to obtain gear rating for any combination of tolerance conditions and offers improved reporting of gear geometry and its effects on the backlash range
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