3 stage planetary gearbox design pdf

Patel institute of engineering, vitthal udyognagar abstract. Design, modelling and analysis of a 3 stage epicyclic planetary reduction gear unit of a flight vehicle k akhila1 and m amarnath reddy2 corresponding author. Open the shaft path in the element explorer and pull a planet carrier into the 3dsurface drag and drop. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. Selecting gears in metric unit the gear tooth profile of the spur gear will be in module. Design of two stage planetary gear trains for reduction ratio 78. Planetary gear trains are extensively used for the power transmission and are the most critical component. New types of planetary face gear drives the developed face gear drives are shown in figs. Tutorial for designing and calculation of a multiplestage. Pdf procedure for optimum design of a twostage spur. Planetary gear system is an assembly of gears where one or more planet gears revolve around a gear placed at centre named.

Pdf design, modelling and analysis of a 3 stage epicyclic. Lightweight design for planetary gear transmissions berndrobert hohn, karsten stahl and philipp gwinner there is a great need for future powertrains in automotive and industrial applications to improve upon their efficiency and power. Planetary gear system is an assembly of gears where one or more planet gears revolve around a gear placed at centre named sun gear and a ring gear encircles the. The first stage has three planets and the second stage five planets. This expertise is the foundation of our planetary gear series.

Design and numerical analysis of optimized planetary gear box. Design and optimization of 2stage reduction gearbox. Our 3 stage planetary gearboxes are available in modular design allowing for easy customization. Spaceoptimized 2 stage design the highend gearbox lines are constructed in a spaceoptimized, two stage design. Economical planetary gearboxes precision helical planetary gearboxes precision atex planetary gearboxes frame size mm 40, 60, 90, 115, 155 60, 90, 115, 142 60, 90, 115, 142, 180, 220 nominal output torque nm up to 460 up to 430 up to 1800 radial load n up to 4600 up to 10 000 up to 50 000 minimum backlash arcmin 3 3 maximum. Planetary gearboxes are used frequently to match the inertias, lower the motor speed, boost the torque, and at the same time provide a sturdy. Line diagram of planetary gearbox system to govern constant generator speed. Planetary gear bearing arrangements in industrial gearboxes. Gearboxes are used to get variable output torque as per requirement. At the same time, expectations for gear reliability are high. Typically, the planet gears are mounted on a movable arm or carrier, which itself may rotate relative to the sun gear. The involute of a circle is the spiraling curve traced by the end of an imaginary taut string unwinding itself from that stationary circle. A generalized optimal design formulation to gear trains was presented. The gearbox has two planetary stages, with helical involute gears.

Choose in the element explorer gear spur gear external gear and drag it into the 3dview. Since, i am working in the metric unit every dimension will be in mm. Then gear 4 transfers the torque from gear 3 back to gear. Three stage planetary gearbox with two output shafts youtube. A planetary gearbox, epicyclic type with sun and planet gears. Framo morat is not only known for its comprehensive manufacturing expertise. Epicyclic gearing systems also incorporate the use of an outer ring gear or annulus, which meshes. The design of the gear teeth also affects the relative position of one gear to another.

An optimal weight design problem of a gear pair system was studied using kisssoft. This ensures every gear box offers a high torsion rigidity. 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. Structure and features 4 types 5 standard reduction ratio ip 6 recommended lubrication oils 6 selection of. In addition to these, every 3 stage planetary gearbox has a robust and stable support. Planetary gear boxes chapter 10 3 index technical information 4 size 100 1. Pdf design and analysis of an epicyclic gearbox for an electric. Reliability for a typical 2 mw gearbox including its first planetary stage and following two parallel stages see figure has been evaluated for a number of cases such as. In more than a few cases, the planetary gears in particular are subjected to loads up to their physical limits. Power house of mhpp expects minimum maintenance, since it is located far from. Lightweight design for planetary gear transmissions.

Pdf in this project, a three stage epicyclic planetary reduction gear unit is designed to meet the output specifications. Design of spur gears spur gear can be modeled similar. Planetary gear trains are one of the main subdivisions of the simple epicyclic gear train family. Planetary gear is one of the epicyclic gear, which is a gear system consisting of one or more outer gears, or planet gears, revolving about a central, or sun gear. Gear design in mdesign gearbox march 2012 driveconcepts gmbh, dresden 3. Single stage planetary gearheads provide possible gear ratios ranging from 3. Conceptual design of planetary gearbox system for constant. Procedure for optimum design of a two stage spur gear system article pdf available in jsme international journal series c 464. We place great importance on your flexibility in the configuration and application of our planetary gears. Planetary kinematics note that point 1 on the planet gear is stationary zero velocity due to noslip assumption note that point 2 on the planet gear has the same velocity as point 2 on the sun gear also due to noslip assumption, which is given by. Every sgr gearbox is designed to allow for proportional distribution of torque with a heavy duty load bearing capability on a lowspeed shaft. The conventional arrangement of single or double stage reduction. Honeywell turbofan tfe 731 rolls royce turboprop tyne iae turbofan v2500 a planetary gearbox with involute spur gears.

Our customers also revere us as experienced partners in drive technology. In the study of akhila and reddy 12, the main aim was to design and analyze a three stage epicyclical planetary reduction gear unit used for a flight vehicle. Please start with the tutorial for shaft calculation to see how to introduce geometry and supports for single shafts. Tutorial for gear design and calculation with mdesign gearbox. The planet gears used in a planetary system share the load, allowing for a much higher torque.

A two stage gearbox or a three stage gearbox can be achieved by simply increasing the length of the ring gear and with serial arrangement of several individual planet stages. Additionally, there is a diversity of planetary gears for different applications. The selection of an appropriate planetary gear for your individual application. In the first step, only one planetary stage is build, in the second step the second planetary stage. The angular speed of the planet carrier can be found since we know the. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. In involute gear design, all contact between two gears occurs in the same fixed, flat plane.

Normally, the sun gear is driven and thus move the planet gears locked in. For a double stage planetary gearhead, the carrier of the first stage becomes the sun gear of the second stage. We design a reduction gearbox is used to reduce the speed of the input,from the electrical motor, while also multiplying the torque the input creates. Experimental characterization of the coupling stage of a. The selection of an appropriate planetary gear for your individual. The research program covers basic ideas of the design of the proposed gear drives. I am unaware of any other book which gives such information and at the same. Housing the housings of the high end range are designed from a onepiece, robust housing.

Gear design process lightweight construction and consideration of available resources result in gearbox designs with high load capacity and power density. If the carrier is acting as the input in the planetary gear system, rotating the ring gear while the sun gear is still, divide the number of teeth on the ring gear the driven gear by the number of teeth on the planetary gears the driving gears. Another advantage of the planetary gearbox arrangement is. In a planetary gearbox we see a sun solar gear, satellite ring gear and two or more planet gears. Sgr planetary gearbox n series features a compact size, low noise operation and excellent durability. The tool investigated is from atlas copco st series and consists of three main parts. Three stage planetary gearbox with two output shafts. This type of efficiency ensures that a high proportion of the energy being input is transmitted through the gearbox, rather than being wasted on mechanical losses inside the gearbox. A two stage planetary gear stage is defined using the program. Planetary gearbox manufacturers,high torque planetary. Design and optimization of planetary gears considering all.