Tooth Contact Analysis Of Modified Spur Face Gear Drives With Alignment Errors

The gear drive is one of the most important forms of modern mechanical transmission, Face gear drive is a new kind of gear drive that a cylindrical gear meshes a bevel gear. In recent years, because of its unique advantages in high speed and heavy duty field, it has been successfully applied in helicopter transmission system in foreign countries, and has become one of the hotspots of gear research. The author based on face gear shaping principle derivate the surface equation and undercut and change sharp formula of face gear, built the face gear3D geometry model, Constructed the face gear drive tooth contact analysis model with alignment errors, studied the contact characteristics of the modified face gear drive, Research provides reference for high performance gear design and manufacturing.The main contents are as follows:1. Construction of face gear tooth surface Mathematical model and geometry model. According to the differential geometry and meshing principle, based on the shaping principle to build the mathematical model of face gear, derivate the undercut and change sharp conditions on direction of the tooth width, through the tooth surface discrete point surface reconstruction and virtual processing two kinds of method established the face gear geometry model.2. Face gear drive tooth contact analysis. Considered three installation error terms to simulate the face gear alignment and constructed the face gear drive tooth contact analysis model with alignment errors, studied the influence regularity of alignment errors on contact path in more detail, results provided reference for precise controllability of contact path position.3. Modified face gear drive tooth contact analysis. Considering the contact path is sensitive to alignment errors, article put forward a kind of cylindrical drum shaped modification method, Put forward a kind of gear drum shape and achieved objective of reducing the alignment errors sensitivity of the gear pair, Article adopted a parabolic profile rack to modify the gear pair in profile correction to can avoid this problem effectively.4. Organization of modified face gear drive TCA analysis software. Taking the MATLAB as calculation tool, and using MATLAB GUI to write the software interface, realized the transmission of data, Carried out the software development of the modified face gear TCA analysis.