Planetary gears normally consist of three parts.
Planetary gearbox design calculations pdf.
1 3 torque selection 8.
Ded in the design calculations.
C material and heat treatment selection.
A single sun gear at the center an internal ring gear around the outside and some number of planets that go in between.
Typically the planet gears are mounted on a movable arm or carrier which itself may rotate relative to the sun gear epicyclic gearing systems also incorporate the use of an outer ring gear or annulus which meshes.
Table of contents.
A question that i often get is how to work out planetary gears using the gear template generator working out the tooth counts for planetary gears is actually not that complicated so i initially neglected to mention how to do it.
1 2 basic size and selection 7.
The gear ratio formula for two meshing gears is simple and intuitive while the gear ratio formula for the planetary mechanism is not.
The frame in the middle where the coordinate system is shown is the design space of your gearbox.
The menu on the right is the element explorer where you can select the required machine elements.
2011 gear boxes calculation and design case example.
Fig 1 components of a planetary gear planetary gears.
Epicyclic gearing or planetary gearing is a gear system consisting of one or more outer or planet gears or pinions revolving about a central sun gear or sun wheel.
Planetary gear trains are one of the main subdivisions of the simple epicyclic gear train family.
Compound planetary gear 728.
Literature review a literature review on planetary gear train design and analysis was carried out and a brief report of the same is presented as below.
The epicyclic gear train family in general has a central sun gear which meshes with and is surrounded by planet gears.
1 1 introduction 6.
Calculation of number teeth of sun planets and ring gear.
Effects of power input reduction ratio motor speed and strength factor of sa fetyareclearlyindicated.
Dynamics of early planetary gear trains a method to analyze the static and dynamic loads in a planetary gear train was developed.
Simple planetary gear trains have a sun gear a ring a carrier and a planet set.
Generally the planets are the same size at a common center distance from the center of the planetary gear and held by.
Literature review on the planetary gear design and analysis.
Planetary gear ratio calculations this article also available in spanish.
A variable variable mesh stiffness vvms model was used to simulate the external and internal spur gear mesh behavior and an equivalent conventional gear train concept was adapted for the dynamic studies.
The planet gears are held to a cage or carrier.
