Planetary Gear Train Research Papers (original) (raw)

Material handling plays vital role in any industry. The hoist crane is one of the demonstrated material handling devices. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. In normal operating conditions with rated load and under test conditions with test loads up to 125 percent of rated load, despite this fact many operators and owners of hoists and cranes fear the possible catastrophic damage that can occur if the driving motor of a unit should fail for any reason. This may lead to Loss of life, Damage of goods or property, loss of Production time due to down time of hoist. Hence there is a need of a safety system in advent of failure of the motor that will avoid above damages. One solution to this problem is to feed the power of two motors of equal rating into a planetary gear drive. This system is proposed with view to offer a dual advantage to the existing single motor system, Safety in case one of the motor fails. Dual speed drives so that same device can cater to more than one application.

- by
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- Planetary Gear Train, Catastrophic, Hoist, Rated load

An experimental research is performed in this study in order to optimize the parameters of planetary driving gear. An orthogonal array and analysis of variance (ANOVA) are employed to investigate the factors: material, module and gear width on the safety coefficient for surface durability. Statistical methods of signal to noise ratio and ANOVA with 95% confidence were applied to quantify the effects of considered factors as well as to obtain the minimum value of the safety coefficient for surface durability. The results of this analysis have shown that the gear module with 80.953% has the greatest influence on the safety coefficient for surface durability of the gear. The second influential factor is a gear width with 18.392%. And the material with 0.615% has the least influence on the safety coefficient for surface durability of the gear. The regression analysis is also shown in the study.

- by Applied Engineering Letters and +2
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- Engineering, Mechanical Engineering, Optimization (Mathematics), Optimization techniques

— In the current world of automobile, gear shifting system are basically classified into manually and automatic. Gear shifting system plays crucial role in automobile to vary the speed. So automatic gear shifting system is costly than manually gear shifts system but manually gear shifting system is difficult to understand for handicap people or it take physical effort to change gear. To overcome this disadvantage we try to apply touch screen based automatic gear shifting system. In that system by touch on touch screen panel gear is shift. By applying this gear shifting system it gives cost reduction in compare of automatic gear shift system and flexible or simple then manually gear shift system, and by applying this system on automobile it's easier to drive car for everyone. It also reduces the possibility of transmission error of manual gear system. The purpose of this research is to reduce physical effort of human being and they can concentrate only in driving and prevent the accidents. In present report we studied literature review biased on this review we define transmission system and gear shifting mechanism to modify a manual gear shifting mechanism.

La ingeniería mecánica aplica principios de termodinámica, mecánica de fluidos, ciencia de materiales, y análisis estructural, y se encarga de diseñar, construir y mejorar nuevos elementos mecánicos con alto impacto en la sociedad. Desde la parte del diseño mecánico, varios autores han desarrollado metodologías eficientes, sin embargo, encontrar una metodología de diseño para cada uno de los elementos mecánicos existentes es complicado, y más aún, si se complementa el diseño teórico y modelado computarizado de dicho elemento, como es el caso de los engranes planetarios. Esta investigación tiene por objetivo, realizar los cálculos teóricos referentes a la nomenclatura de un tren de engranajes para posteriormente plantear una metodología de
diseño en el software Solidworks®. Las consideraciones iniciales de diseño son; la cremallera tiene un diámetro de 3000 mm, y se requiere una multiplicación de relaciones; por cada vuelta de la cremallera, el sol o engranaje central deberá girar 10 veces, y el espesor de los engranes es de 50 mm, esto para ser aplicado en un aerogenerador eólico.

Most common planetary gear sets which
are implemented in numerous automatic
transmission systems are presented in this paper.
Automatic transmissions in which these gear sets are
implemented were also briefly mentioned. Alongside
these topics, cutting edge automatic transmission
systems alongside their schematics were also
presented. Current industry developments and future
of automatic transmission systems were also briefly
analyzed.

- by Blaza Stojanovic
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- Engineering, Mechanical Engineering, Automatic Transmissions, Gears
- by Essam EsmailEsmail
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- Efficiency, Planetary Gear Train, Epicyclic Gear Trains, Nomographs

The power transfer is an irreplaceable part of every industry. Due to technology improvement, the mechanisms are working with less and less losses, but their constructions are becoming more complex. This essay is dedicated to the planetary gear sets, with a focus on the Ravigneaux planetary gear set which represents, in fact, improved version of Simpson's planetary gear set. The detailed kinematic analysis of the gear set will be explained in a form of the calculation of the number of revolutions for every gear set, independently to the axis around which they revolve.

- by Blaza Stojanovic and +1
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- Engineering, Mechanical Engineering, Gears, Kinematics

This manuscript investigates research done in the field of harmonic drives. A brief synopsis of papers dealing with material analysis, optimized design parameters for harmonic drive are presented. Another research work investigating the use of harmonic drives for space applications is discussed at length. Lastly, a work discussing optimized flex spline design, interference study and micro harmonic drive design is also put forward in this manuscript.

- by GRD JOURNALS
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- Planetary Gear Train, Harmonic Drive, Flexspline, Wave Generator

Numerical analysis of contact stresses at rotational elements of gerotor pumps with fixed position of shafts axis and with driving rotor acting as internal element, is presented in this paper. The basic characteristics and principles of functioning of this type of pumps are explained and review of researches in the area of numerical methods and developments and design optimizations of those pumps are presented. The basic assumptions, limitation and input values are defined in order to determine maximal stresses, numerical analysis of contact stresses, which are caused by transmitting of torque from internal to external gear. The obtained results of research contact stresses by numerical and analytical method are graphical presentations. The comparisons of results for better understanding of its deviations also were performed.

- by Applied Engineering Letters and +2
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- Engineering, Mechanical Engineering, Numerical Simulations, Numerical Modeling

The pitch gearbox for 4MW-class wind turbine is comprised of a triple-gear planetary system. It is a component that keeps wind turbine blades rotating at a constant speed by adjusting their angles, and should have a life span of at least 20 years. This study analyzed the design stability and vibrational characteristics of pitch gearbox components for 4MW-class wind turbine. Design stability was secured by performing stress analysis of the housing and carriers under actual loads and extreme loads, specified in Load Duration Distribution (LDD), through finite element analysis. The natural frequencies and mode shapes of the pitch gearbox were also analyzed. There was found to be significant deformation of the third planetary gear for the first and second mode shapes, of the second planetary gear for the third and fourth mode shapes, and of the first planetary gear for the fifth and sixth mode shapes. Critical speed was assessed based on analysis of excitation source in relation to mass imbalance and excitation source. In the range of operation of the pitch gearbox, that is, 260rpm – 320rpm, critical speed did not exist.

- by Essam Esmail
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- Mechanical Engineering, Automatic Transmissions, Mechanism Design, Gears

We propose hereafter a unified model of epicyclic gear trains, based on a primitive parametric kernel, which contains all usual gear train formulations of any compound gear train. We show that the nested and the Ravigneaux gear train derive from a unified model, which permits to obtain the formulation of ratio and efficiency. Therefore the conception of a gear train if the kinematics or dynamics are fixed can be solved with an analytical resolution.

- by Yves Rémond
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- Planetary Gear Train

- by Yves Rémond
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- Planetary Gear Train
- by Yves Rémond
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- Mechanical Engineering Design, Planetary Gear Train

La ingeniería mecánica aplica principios de termodinámica, mecánica de fluidos, ciencia de materiales, y análisis estructural, y se encarga de diseñar, construir y mejorar nuevos elementos mecánicos con alto impacto en la sociedad. Desde la parte del diseño mecánico, varios autores han desarrollado metodologías eficientes, sin embargo, encontrar una metodología de diseño para cada uno de los elementos mecánicos existentes es complicado, y más aún, si se complementa el diseño teórico y modelado computarizado de dicho elemento, como es el caso de los engranes planetarios. Esta investigación tiene por objetivo, realizar los cálculos teóricos referentes a la nomenclatura de un tren de engranajes para posteriormente plantear una metodología de diseño en el software Solidworks®. Las consideraciones iniciales de diseño son; la cremallera tiene un diámetro de 3000 mm, y se requiere una multiplicación de relaciones; por cada vuelta de la cremallera, el sol o engranaje central deberá girar 1...

- by Fabiola Recinos
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- Geography, Planetary Gear Train