Study of the Tooth Contact Pattern for Double-Enveloping Worm Gear

Area of Science:

• Mechanical Engineering
• Tribology
• Gear Design

Background:

• Globoid worm gears with rectilinear axial tooth profiles are crucial in various mechanical systems.
• Understanding tooth contact patterns is essential for optimizing gear performance and longevity.
• Existing methods for analyzing contact patterns may lack comprehensive validation or practical application.

Purpose of the Study:

• To comprehensively analyze contact patterns in globoid worm gears with rectilinear axial tooth profiles.
• To validate theoretical predictions of contact patterns using experimental data.
• To provide reliable tools for evaluating and improving worm gear design.

Main Methods:

• Utilized a Computer-Aided Design (CAD)-based simulation for determining contact patterns.
• Employed experimental techniques, including two-sheet pressure measurement films, for validation.
• Compared and analyzed the form, size, and position of contact patterns from both methods.

Main Results:

• The CAD-based method accurately determined the form, size, and position of contact patterns.
• Experimental results qualitatively confirmed theoretical predictions from the CAD model.
• Measured contact areas were smaller than predicted due to fabrication inaccuracies and incomplete filling.

Conclusions:

• The developed CAD models and experimental methods provide reliable tools for worm gear analysis.
• These methods can aid in reducing prototyping costs and improving the design of globoid worm gears.
• The study lays a foundation for enhancing contact performance in double-enveloping worm gear systems.