# contact ratio

## contact ratio

[′kän‚takt ‚rā·shō]
(design engineering)
The ratio of the length of the path of contact of two gears to the base pitch, equal to approximately the average number of pairs of teeth in contact. Also known as contact gear ratio.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Mentioned in ?
References in periodicals archive ?
The contact characteristics can be presented by the contact ratio c, which is defined as the percentage of area fraction occupied by the contact areas to total areas:
In this paper, we are simulating the IBC structure of silicon solar cell in three dimension with respect to the contact ratio. The contact ratio is defined as the ratio of width of contact opening to the width of emitter and BSF.
Number of planets N= 3 Inertia (kg) [I.sub.s]/[r.sub.s.sup.2] = 2.5, [I.sub.s]/ [r.sub.s.sup.2] = 2.5, [I.sub.p]/ [r.sub.p.sup.2] = 2 Mesh stiffness (N/m) [k.sub.sp] = [k.sub.rp] = [10.sup.8] Pressure angle (degree) [[alpha].sub.s] = 24.6, [[alpha].sub.r] = 20.19 Contact ratio [c.sub.s] = 1.4, [c.sub.r] = 1.6 Circumferential angle [[psi].sub.n] = 2[pi](n-1)/N, n = 1, 2, ..., N Sun-planet meshing phase [[gamma].sub.sn] = [0,0,0] Ring-planet meshing phase [[gamma].sub.m] = [0,0,0] Natural frequencies (Hz) [[omega].sub.1] = 0, [[omega].sub.2] = 1177.7, [[omega].sub.3] = [[omega].sub.4] = 1591.5, [[omega].sub.5] = 2215.1 Mesh stiffness variation [[epsilon] = [[epsilon].sub.1] = 0, 0.05, 0.1, 0.15, 0.2, 0.25
Kissling (4) analyses the effect produced by short linear, long linear, short arc-like, long arc-like and fully crowned profile corrections on gears with different transverse contact ratio. Even if some results are displayed for the Contact Pressure, this study is mainly focused on the Transmission Error.
The contact ratio ([[epsilon].sub.[alpha]]) of the spur gear is calculated through the equation (5).
IFPG has spent endless hours identifying exactly what people in the Franchise industry need to efficiently and effectively increase their contact ratio then track their leads from the initial discussions to the closed deal.
Gear Mechanics Background: Backlash, Contact Ratio, and Tooth Cut
The contact ratio [Z.sub.[epsilon]] and the helix angle factor [Z.sub.[beta]] were set to 1, since [beta] = [0.sup.[omicron]].
To go over from the parameter h to contact ratio, the following expression should be used:
They eliminate axial thrust, prevent tilting moments and ensure silent running owing to the larger contact ratio of meshing teeth, improved distribution of heat in the tooth area.
[[epsilon].sub.ad] = Contact ratio of asymmetric gear drive

Site: Follow: Share:
Open / Close