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Design and Generation of Straight Bevel Gears
Published in Stephen P. Radzevich, Advances in Gear Design and Manufacture, 2019
In this section and based on the derivations presented above, the geometry of a crown gear that will be used as generating tool for bevel gears will be obtained [6]. Firstly, we will consider the spherical involute profile as reference geometry for the crown gear. A crown gear is a particular case of bevel gear where the pitch cone angle is 90°. The meshing between a crown gear and a bevel gear is analogous to the meshing between a rack and a spur gear and, therefore, a similar process of generation of the bevel gear can be formulated based on the theory of gearing and the geometry of the crown gear. Depending on the geometry of the crown gear used as a theoretical generating tool, different geometries for bevel gears can be obtained.
Gears
Published in Asok Kumar Mallik, Amitabha Ghosh, Günter Dittrich, Kinematic Analysis and Synthesis of Mechanisms, 1994
Asok Kumar Mallik, Amitabha Ghosh, Günter Dittrich
A crown gear is a bevel gear in which the pitch cone angle is equal to 90° and bears the same relation to a bevel gear as a rack does to a spur gear. Therefore, the bevel gear system has been developed so that the teeth generated are conjugate to the teeth of a crown gear having flat sides. Figure 10.9-4 shows a crown gear; the sides of the teeth lie in planes passing through the center of the sphere (the apex). The path of contact is in the form of a figure 8 and only a portion of the path of contact is used, depending on the height of the teeth.
Perfect Intersected-Axes Gear Pairs
Published in Stephen P. Radzevich, Theory of Gearing, 2018
In the particular case when the pitch cone angle of a gear, Γ, is equal to a right angle (Γ = 90°), the pitch cone becomes a flat surface, and the resulting gear is called a crown gear. A crown gear is a bevel gear with a planar pitch surface. The position vector of a point of a crown gear is specified by Equation 12.61 under the assumption that the equality Γ = 90° is valid.
Experimental investigation on modified air abrasive jet machining (MAAJM)
Published in Production & Manufacturing Research, 2020
S. Rajendra Prasad, K. Ravindranath, M.L.S. Devakumar
This novel approach mainly focused on reducing taper in a hole/achieving uniform tapered hole by using of turbine blades holes for the coolant purpose, the past works the nozzle is motion with respect to worktable, to achieve 53% of cylindrical hole (Abhishek & Somashekhar, 2016). Important modification of this present approach is to keep work-table in rotary and reciprocating motion continuously and to change SOD by crown gear mechanism by supporting of handle. The detailed explanation of rotary system provided in Section 2. The rotary worktable, a worktable rotary system is designed, fabricated and incorporated with existing AAJM setup. The details on modified setup explained in Section 3.
An analysis model for predicting windage power loss of aviation spiral bevel gears under optimal injection jet layout
Published in Tribology Transactions, 2023
Linlin Li, Sanmin Wang, Linlin Liu
The experimental gear windage loss data of shrouded crown gear plus pinion with pinion bearings oil flow 2.27 liters/minute (24) is plotted in Fig. 18 and compared with the theoretical values that the reduction factor ζ is set to 0.4 and the numerical calculations by clockwise and anticlockwise rotation (19).