scispace - formally typeset
Search or ask a question
Topic

Pressure angle

About: Pressure angle is a research topic. Over the lifetime, 1373 publications have been published within this topic receiving 10245 citations. The topic is also known as: angle of obliquity.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the authors investigated the relationship between the turbulent shear stress and the kinetic energy of the turbulent velocity fluctuations in a two-dimensional base flow and found that the ratio of the shear stresses to the kinetic energies of the velocity fluctuations depends solely on the wedge angle and not on the base pressure and pressure drag of the body.

5 citations

Patent
09 Jul 1980
TL;DR: In this paper, the authors proposed to maintain the tooth thickness of the pinion's tooth-base side by constituting a gear in such a way that its tooth surface having a small pressure angle may have smaller effective engagement diameter of the tooth top side than the tooth's top diameter.
Abstract: PURPOSE:To sufficiently maintain the tooth thickness of the pinion's tooth-base side and improve the pinion's mechanical strength by constituting a gear in such a manner that its tooth surface having a small pressure angle may have smaller effective engagement diameter of the tooth top side than the tooth top diameter. CONSTITUTION:The tooth 11 of a gear is composed of a tooth surface 111 of a small pressure angle and a tooth surface 112 of a large pressure angle. The effective engagement diameter R1 of the tooth surface 111 having a small pressure angle is so constituted as to be smaller by C1 than the effective engagement diameter on the tooth top side of tooth surface 112 having a large pressure angle, that is, generally the tooth top diameter R2. A portion shown by an oblique line is truncated. In the meantime, the tooth 21 of a pinion is so constituted that its tooth-top side's effective engagement diameter R3 of tooth surface having a small pressure angle is larger by C1 than the tooth base side's effective engagement diameter R4 corresponding to the tooth top diameter R2 of gear 1.

5 citations

Journal Article
TL;DR: The Elastohydrodynamic lubrication (EHL) model of the involute helical gears was developed by simplifying the contact between tooth surfaces in the mesh of a pair of helical gear into a finite line-contacts lubrication problem as discussed by the authors.

5 citations

Journal ArticleDOI
Abstract: A three-dimensional photoelastic analysis using the stress-freezing and slicing techniques was employed in studying the stress distribution and concentration across the thickness of a thick rack-gear tooth. Full-size photoelastic models of about 25-mm thickness, having various teeth parameters were machined from PLM-4B plates. A special mounting fixture was designed to hold the models in the loading frame and a knife-edged line load was used in loading the models. In the analysis, the method of ‘oblique incidence’ was adopted for the separation of the principal stresses. The intension was to determine the magnitude and location of the maximum stress at the tensile fillet and to establish the stress-concentration factors for various geometric tooth configurations. From this study, it was concluded that the fillet stresses depend largely upon the pressure angle, fillet radius and the position of the load. Maximum values of the tensile fillet stresses occur at the middle plane of the tooth thickness. Furthermore, the value of the stress-concentration factor increases with the increase of the tooth thickness. In general, this investigation gave values of stresses much higher than those values calculated by the simple-flexure theory.

5 citations

Patent
29 Aug 2003
TL;DR: In this article, the authors proposed an approach to improve the mechanical efficiency of an inner gearing planetary gear mechanism and improve the durability of an external gear and an internal gear by reducing the load and loss added to tooth faces of the external gear 3 and the internal gear 4 and a sliding part such as a bearing 14.
Abstract: PROBLEM TO BE SOLVED: To improve the mechanical efficiency of an inner gearing planetary gear mechanism and to improve the durability of an external gear 3 and an internal gear 4 by reducing the load and loss added to tooth faces of the external gear 3 and the internal gear 4 and a sliding part such as a bearing 14. SOLUTION: A distance between a center of the external gear 3 and a center of the internal gear 4 is elongated by determining the eccentricity α of an eccentric part 1 to be more than a theoretical value, whereby the loss of the tooth faces of the bearing 14 and the gears can be reduced. An engagement range of the internal gear 4 and the external gear 3 can be narrowed, a part of large pressure angle can be reduced, and the loss caused by the large pressure angle can be reduced. Further the engagement range of the external gear 3 and the internal gear 4 is narrowed, whereby the contact condition of the gear is transferred from sliding contact to rolling contact, which reduces the loss by sliding contact. Further as the sliding contact is reduced, the abrasion by the sliding contact can be prevented, and the endurance service life of the gears can be improved. COPYRIGHT: (C)2005,JPO&NCIPI

5 citations


Network Information
Related Topics (5)
Machining
121.3K papers, 1M citations
78% related
Vibration
80K papers, 849.3K citations
72% related
Piston
176.1K papers, 825.4K citations
71% related
Residual stress
39K papers, 554.8K citations
71% related
Flange
131K papers, 564.9K citations
71% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202313
202244
202127
202038
201960
201841