Mitsuhiro Nishida Chief Engineer Fukuoka Works Mitsubishi Electric Fukuoka, JAPAN Scroll co1pressors are beco•ins popular in air conditionior and refrigeration. This is priurily due to their higher efficiency and Jo, noise/vibration characteristics. The scroll principle can be appi ied also to the stea• expander and the Brayton cycle engine, as shown in the past literature. The Otto cycle spark...

Based on the comprehensive analysis of previous research about the spiral bevel and hypoid gear, principle of forming spherical involute tooth surface was proposed with the spherical involute that was new theory applied in the field of their modeling. According to precise shape of tooth surfaces, each part of the quick and accurate derivations of the basic parametric equation of the tooth profi...

In this study, a transient, non-Newtonian, mixed elastohydrodynamic lubrication (EHL) model of involute spur gear tooth contacts is proposed. Unlike the contact between two cylindrical rollers, spur gear contacts experience a number of time-varying contact parameters including the normal load, radii of curvature, surface velocities, and slide-toroll ratio. The proposed EHL model is designed to ...

In practical use, most gears have an involute shape of tooth flanks. However, external some drawbacks, such as unfavourable kinematic conditions at the beginning and end meshing, a limited minimum number teeth, highly loaded convex-convex (i.e., non-conformal) contact. Researchers developed analysed various non-involute forms flanks, but they not been widely accepted. The main reasons are highe...