ВУЗ:
Составители:
Рубрика:
74
V. PLANETARY GEAR DRIVES
Read, translate the following text. Compare the style of the
following text with the style of the text above. What is the difference
between scientific, colloquial and belles styles? Give your
conclusions.
1. A SIMPLIFIED APPROACH FOR DETERMINING
POWER LOSSES AND EFFICIENCY OF
PLANETARY GEAR DRIVES
By Eugene I. Radzimovsky
Associate Professor of Mechanical Engineering University of
Illinois Urbana, III.
In a planetary gear drive, the power circulating within the system
elements may differ appreciably from that being transmitted. This
unique characteristic, which is a result of the relative motion of the gear
members, is present in some degree in all planetary gear trains and has a
significant effect on the performance and efficiency of systems
transmitting power continuously. Power losses become a function of the
power developed in the gearing rather than of the actual power
transmitted through the train.
Several methods for determination of power losses and efficiencies
of planetary gearing have been proposed, and expressions for a number
of specific gear arrangements have been developed. Most of these
analyses are based on the principle of equilibrium of moments first
suggested by Massot.
1
This article presents a new approach to the problem and offers a
general method of solution, utilizing the concept of an "equivalent"
conventional gear train in conjunction with the particular kinematic
characteristics of planetary systems. Several representative planetary
gear arrangements are analyzed to illustrate application of the principles
discussed.
Nomenclature
d = Pitch diameter of gear, in.
e = Efficiency of planetary gear
pair
m
p
= Overall speed ratio of planetary
gear train
n = Number of meshing
pairs in a gear
Страницы
- « первая
- ‹ предыдущая
- …
- 72
- 73
- 74
- 75
- 76
- …
- следующая ›
- последняя »
