Browsing by Subject "Gears"
Now showing items 120 of 41

Analisi degli effetti delle approssimazioni dello spettro reale di carico sul danneggiamento delle singole dentature
(AIAS, 2011)Molto spesso, in fase di progettazione di una trasmissione vengono introdotte ipotesi semplificative o tralasciati alcuni aspetti considerati minori. Frequentemente si trascura l’effettiva storia temporale dei carichi sul ... 
Analysis of power losses in an industrial planetary speed reducer: Measurements and computational fluid dynamics calculations
(2014)In this work, experimental and theoretical analyses of the power losses in an industrial planetary speed reducer were performed in order to define the weight of the different types of power losses in the global efficiency ... 
Analysis of the oil squeezing power losses of a spur gear pair by mean of CFD simulations
(ASME, 2012)Efficiency is becoming more and more a main concern in the design of power transmissions and the demand for high efficiency gearboxes is continuously increasing. Also the new restrictive euro standards for the reduction ... 
Analysis of the Oil Squeezing Power Losses of a Spur Gear Pair by Mean of CFD Simulations
(ASME, 2012)Efficiency is becoming more and more a main concern in the design of power transmissions and the demand for high efficiency gearboxes is continuously increasing. Also the new restrictive euro standards for the reduction ... 
Analysis of the Power Losses in Geared Transmissions: Measurements and CFD Calculations Based on Open Source Codes
(Open Source CFD, 2013)The increasing demand of more and more efficient gearboxes implies the need of predictive models. Models provided by literature for load independent power losses are mainly based on experimentally derived relations that ... 
Austempered Ductile Iron (ADI) for gears: Contact and bending fatigue behavior
(Elsevier, 2017)Austempered Ductile Iron (ADI) represents an alternative solution for the manufacturing of the housing of small planetary gearboxes, with the gear teeth obtained directly on the housing itself: such solution combines a ... 
Austempered Ductile Iron (ADI) for gears: manufacturing, performances and tests
(VDI, 2017)Austempered Ductile Iron (ADI) represents an alternative solution for the manufacturing of the housing of small planetary gearboxes, with the gear teeth obtained directly on the housing itself: such solution combines a ... 
Austempering alleggerimento e ottimizzazione dei componenti
(2015)La ghisa austemperata, comunemente detta anche ADI, è un materiale che offre simultaneamente resistenza alla fatica, resistenza all’usura, tenacità, leggerezza, ampi gradi di libertà di disegno dei componenti ed una buona ... 
Bending Fatigue Strength of Case Carburized and Nitrided Gear Steels for Aeronautical Applications
(2017)A longterm research program was performed in order to experimentally characterize the bending fatigue resistance of high strength, high cleanliness gear steels typically used in the main gearbox of helicopter transmissions. ... 
Bending fatigue strength of innovative gear materials for wind turbines gearboxes: Effect of surface coatings
(ASME, 2012)In order to better exploit the available resources, wind turbine size is constantly increasing: the need of bigger gearboxes is an obvious and immediate consequence of this evolution tendency. The traditional manufacturing ... 
A CFD analysis of the oil squeezing power losses of a gear pair
(2014)Efficiency is becoming more and more a main concern in the design of power transmissions and the demand for high efficiency gearboxes is continuously increasing. Also the more and more restrictive euro standards for the ... 
CFD simulation of power losses and lubricant flow in gearboxes
(AGMA, 2017)Energy efficiency represents one of the most relevant drivers in many application fields and power transmission and gears play a critical and fundamental role in many of them, contributing to improve the overall efficiency ... 
CFD simulations of splash losses of a gearbox
(2012)Efficiency is becoming a main concern in the design of power transmissions. It is therefore important, especially during the design phase, to have appropriate models to predict the power losses. For this reason, CFD ... 
Churning power losses of ordinary gears: A new approach based on the internal fluid dynamics simulations
(2015)The increasing need of more and more efficient gearboxes implies the need of predictive models in order to compare, during the design stage, different design solutions. The models provided by literature are mostly ... 
Computational and experimental analysis of the churning power losses in an industrial planetary speed reducer
(WIT press, 2012)Advantages of planetary speed reducers are well known and due to their compact design and power density they are suitable for a wide range of applications. Efficiency is becoming more and more of a main concern in the ... 
Cuscinetti come ingranaggi – la tecnologia degli ingranaggi volventi: Un nuovo meccanismo per un ingranamento puramente volvente
(2016)I riduttori epicicloidali sono apprezzati per la loro densità di potenza coniugata ad elevate riduzioni in piccoli ingombri. Questa loro caratteristica, però, porta con se una limitata capacità di smaltimento del calore e ... 
Design optimization of planetary gear trains under dynamic constraints and parameter uncertainty
(Czech Technical University, 2017)In this work, the vibrational behavior of planetary gear trains is of concern as this can lead to detrimental effects including fatigue, comfort and acoustics. Lumpedparameter models are useful in early development phases ... 
Effect of the machining tolerances on the transmission error of planetary gearboxes: A numerical approach
(Enginsoft, 2015)The increasing demand for lownoise gearboxes has pointed out the importance to calculate the variation of the mesh stiffness which is the main source of excitation. The running noise, in fact, is the result of transmission ... 
Gear Lubrication and Efficiency Predictions: A new MeshHandling Algorithm to Reduce the CFD Simulation Time
(Enginsoft, 2016)To improve the efficiency of geared transmissions, prediction models are required. Literature provides only simplified models that often does not take into account the influence of many parameters on the power losses. ... 
Hydraulic losses of a gearbox: CFD analysis and experiments
(2013)Efficiency is becoming a main concern in the design of power transmissions. It is therefore important, especially during the design phase, to have appropriate models to predict the power losses. For this reason CFD ...