Relevant bibliographies by topics / Gearbox design; optimal design; helical gearbox

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Gearbox design; optimal design; helical gearbox'

Author: Grafiati
Published: 3 June 2025
Last updated: 13 July 2025

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Journal articles on the topic "Gearbox design; optimal design; helical gearbox"

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Anh, Le Hoang, Nguyen Hong Linh, Nguyen Huu Quang, et al. "Cost optimization of two-stage helical gearboxes with second stage double gear-sets." EUREKA: Physics and Engineering, no. 6 (November 18, 2021): 89–101. https://doi.org/10.21303/2461-4262.2021.001855.

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In practice, the cost of a gearbox plays a very important role in the trade. Therefore, reducing the cost of gearboxes is an important task not only when manufacturing the gearboxes but also when designing them. In order to reduce the cost of a gearbox, there are many solutions in which determining the optimal partial gear ratios of a gearbox is an effective measure. This is because it not only the size, the mass but also the cost of a gearbox depends greatly on the partial gear ratios. This work presents a method for calculating the cost function of two-stage helical gearboxes with second-stage double gear-sets based on the mass of the components that construct the gearbox. The cost objective function is minimized to achieve the optimal transmission ratios. Furthermore, screening experiments are carried out with nine important input parameters that have significant effects on the optimum transmission ratio of the second stage. These parameters are the total gearbox ratio, the coefficient of wheel face width of the first stage, coefficient of wheel face width of the second stage, the allowable contact stress of the first stage, the allowable contact stress of the second stage, the output torque, the cost of gearbox housing, the cost of gears, and the shaft cost. The experimental results of were analysed by using the Analysis of Variance (ANOVA) method with the help of Minitab 19 software. The results demonstrate that the effective weight of the input parameters and their interactions on the output response was investigated. Also, a regression model for computing the optimal transmission ratio of the second stage was proposed. This brings significance not only in the design process but also in manufacturing since the gearbox cost can decrease
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Anh, Le Hoang, Nguyen Hong Linh, Nguyen Huu Quang, et al. "Cost optimization of two-stage helical gearboxes with second stage double gear-sets." EUREKA: Physics and Engineering, no. 6 (November 18, 2021): 89–101. http://dx.doi.org/10.21303/2461-4262.2021.001855.

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In practice, the cost of a gearbox plays a very important role in the trade. Therefore, reducing the cost of gearboxes is an important task not only when manufacturing the gearboxes but also when designing them. In order to reduce the cost of a gearbox, there are many solutions in which determining the optimal partial gear ratios of a gearbox is an effective measure. This is because it not only the size, the mass but also the cost of a gearbox depends greatly on the partial gear ratios. This work presents a method for calculating the cost function of two-stage helical gearboxes with second-stage double gear-sets based on the mass of the components that construct the gearbox. The cost objective function is minimized to achieve the optimal transmission ratios. Furthermore, screening experiments are carried out with nine important input parameters that have significant effects on the optimum transmission ratio of the second stage. These parameters are the total gearbox ratio, the coefficient of wheel face width of the first stage, coefficient of wheel face width of the second stage, the allowable contact stress of the first stage, the allowable contact stress of the second stage, the output torque, the cost of gearbox housing, the cost of gears, and the shaft cost. The experimental results of were analysed by using the Analysis of Variance (ANOVA) method with the help of Minitab 19 software. The results demonstrate that the effective weight of the input parameters and their interactions on the output response was investigated. Also, a regression model for computing the optimal transmission ratio of the second stage was proposed. This brings significance not only in the design process but also in manufacturing since the gearbox cost can decrease
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Tran, Huu-Danh, Xuan-Hung Le, Thi-Thanh-Nga Nguyen, Xuan-Tu Hoang, Quy-Huy Trieu, and Ngoc-Pi Vu. "Application of the Taguchi Method and Grey Relational Analysis for Multi-Objective Optimization of a Two-Stage Bevel Helical Gearbox." Machines 11, no. 7 (2023): 716. http://dx.doi.org/10.3390/machines11070716.

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This paper introduces a novel approach to deal with the multi-objective optimization of a two-stage bevel helical gearbox by applying the Taguchi method and Grey Relation Analysis (GRA). The goal of the study is to find optimal main design factors that minimize the gearbox volume and maximize the gearbox efficiency. To accomplish this, five main design parameters were selected: the coefficients of wheel face width (CWFW) of the bevel and the helical gear sets, the allowable contact stresses (ACS) of the first and the second stages, and the gear ratio of the first stage. Furthermore, two single targets were investigated: minimum gearbox volumes, and maximum gearbox efficiency. Also, the multi-objective optimization problem is solved through two steps: Step 1 for closing the gap between variable levels and Step 2 for determining the optimal main design factors. The study’s findings were used to introduce the optimum values of five major design parameters for designing a two-stage helical gearbox.
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Vu, Binh Duc, Hung Quoc Tran, Thanh Van Dinh, Trang Van Nguyen, and Minh Khac Nguyen. "Multi-objective optimization of a two-stage helical gearbox with double gears in second stage using saw technique to reduce bottom area and enhance efficiency." Eastern-European Journal of Enterprise Technologies 1, no. 4 (133) (2025): 72–80. https://doi.org/10.15587/1729-4061.2025.322992.

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Two-stage helical gearboxes featuring two gears in the second stage are widely used across various industries. This gearbox design helps enhanced load capacity, increases consistent force distribution, and minimizes operational noise. One significant challenge in the design of this type of gearbox is the simultaneous optimization of multiple design criteria, including transmission efficiency and overall size. Optimizing gearbox design involves more than selecting an appropriate gear configuration; it necessitates a complete approach that balances performance with size, ensures sustainable operation, and minimizes manufacturing costs. This study was conducted to develop a method for solving the multi-objective optimization problem (MOOP) related to the design of a two-stage helical gearbox (TSHG) containing double gears in the second stage (DGSS). The primary focus is on two single-objective functions: maximizing gearbox efficiency and minimizing the gearbox bottom area. This study investigates three primary design parameters: the gear ratio of the first stage (u1), the gear width coefficient of the first stage (Xba1), and second stage (Xba2). The optimization process was carried out in two distinct stages. The initial phase focused on the single-objective optimization problem aimed at minimizing the gap among the variable levels. The second stage concentrated on dealing with the MOOP to identify the optimal design parameters. The Simple Additive Weighting (SAW) method was employed to solve the multi-criteria decision-making (MCDM) problem, while the MEREC technique was utilized to establish the weights of the criteria. The implementation of SAW in this context introduces a novel methodology that streamlines the identification of the optimal solution while enhancing the precision of the outcomes. Moreover, addressing the MOOP problem in a two-stage approach reduces the solution process and enhances the precision of the outcomes. The proposed optimized values of the primary design parameters aim to enhance gearbox efficiency and maximize installation space, thereby facilitating potential applications across diverse industries
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Le, Xuan-Hung, and Ngoc-Pi Vu. "Multi-Objective Optimization of a Two-Stage Helical Gearbox Using Taguchi Method and Grey Relational Analysis." Applied Sciences 13, no. 13 (2023): 7601. http://dx.doi.org/10.3390/app13137601.

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This paper presents a novel approach to solve the multi-objective optimization problem designing a two-stage helical gearbox by applying the Taguchi method and the grey relation analysis (GRA). The objective of the study is to identify the optimal main design factors that maximize the gearbox efficiency and minimize the gearbox mass. To achieve that, five main design factors. including the coefficients of wheel face width (CWFW) of the first and the second stages, the allowable contact stresses (ACS) of the first and the second stages, and the gear ratio of the first stage were chosen. Additionally, two single objectives, including the maximum gearbox efficiency and minimum gearbox mass, were analyzed. In addition, the multi-objective optimization problem is solved through two phases: Phase 1 solves the single-objective optimization problem in order to close the gap between variable levels, and phase 2 solves the multi-objective optimization problem to determine the optimal main design factors. From the results of the study, optimum values of five main design parameters for designing a two-stage helical gearbox were first introduced.
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Dinh, Van-Thanh, Huu-Danh Tran, Duc-Binh Vu, Duong Vu, Ngoc-Pi Vu, and Thi-Tam Do. "Multi-Objective Optimization for Finding Main Design Factors of a Two-Stage Helical Gearbox with Second-Stage Double Gear Sets Using the EAMR Method." Symmetry 16, no. 7 (2024): 783. http://dx.doi.org/10.3390/sym16070783.

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When optimizing a mechanical device, the symmetry principle provides important guidance. Minimum gearbox mass and maximum gearbox efficiency are two single objectives that need to be achieved when designing a gearbox, and they are not compatible. In order to address the multi-objective optimization (MOO) problem with the above single targets involved in building a two-stage helical gearbox with second-stage double gear sets, this work presents a novel application of the multi-criteria decision-making (MCDM) method. This study’s objective is to identify the best primary design elements that will increase the gearbox efficiency while lowering the gearbox mass. To carry this out, three main design parameters were selected: the first stage’s gear ratio and the first and second stages’ coefficients of wheel face width (CWFW). Furthermore, a study focusing on two distinct goals was carried out: the lowest possible gearbox mass and the highest possible gearbox efficiency. Furthermore, the two stages of the MOO problem are phase 1 and phase 2, respectively. Phase 2 solves the single-objective optimization issue to minimize the difference between variable levels and the MOO problem to determine the optimal primary design factors. To solve the MOO problem, the EAMR (Evaluation by an Area-based Method of Ranking) method was also chosen. The following are important features of this study: First, a MCDM method (EAMR technique) was successfully applied to solve a MOO problem for the first time. Secondly, this work explored the power losses during idle motion to calculate the efficiency of a two-stage helical gearbox with second-stage double gear sets. This study’s findings were used to identify the optimal values for three important design variables to design a two-stage helical gearbox with second-stage double gear sets.
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Dinh, Van-Thanh, Huu-Danh Tran, Quoc-Hung Tran, et al. "Multi-Objective Optimization of a Two-Stage Helical Gearbox Using MARCOS Method." Designs 8, no. 3 (2024): 53. http://dx.doi.org/10.3390/designs8030053.

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In order to address the Multi-Objective Optimization Problem (MOOP) in building a two-stage helical gearbox, this work presents a novel application of the Multi-Criterion Decision-Making (MCDM) method. The aim of the study is to determine the optimal primary design factors that will increase gearbox efficiency while decreasing gearbox volume. Three main design parameters were chosen for assessment in this work: the first stage’s gear ratio, and the first and second stages’ Coefficients of Wheel Face Width (CWFW). In addition, the MOOP is divided into two phases: phase 1 solves the single-objective optimization problem to reduce the gap between variable levels, and phase 2 solves the MOOP to determine the optimal primary design factors. Furthermore, the Entropy approach was picked to compute the weight criteria, and the MARCOS method was chosen as an MCDM method to handle the multi-objective optimization issue. The following are important characteristics of the study: Firstly, the MCDM method (MARCOS technique) was successfully applied to solve a MOOP for the first time. Secondly, this work has looked into power losses during idle motion to calculate the efficiency of a two-stage helical gearbox. The results of the study were used in the design of a two-stage helical gearbox in order to identify the optimal values for three important design parameters.
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Tran, Huu-Danh, Van-Thanh Dinh, Duc-Binh Vu, Duong Vu, Anh-Tung Luu, and Ngoc Pi Vu. "Application of the TOPSIS Method for Multi-Objective Optimization of a Two-Stage Helical Gearbox." Engineering, Technology & Applied Science Research 14, no. 4 (2024): 15454–63. http://dx.doi.org/10.48084/etasr.7551.

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In order to design a high-efficiency two-stage gearbox to reduce power loss and conserve energy, a Multi-Criterion Decision-Making (MCDM) method is selected for solving the Multi-Objective Optimization Problem (MOOP) in this research. The study's objective is to determine the best primary design factors that will increase gearbox efficiency and decrease gearbox mass. To that end, the first stage's gear ratio and the first and second stages' Coefficients of Wheel Face Width (CWFW) were chosen as the three main design elements. Furthermore, two distinct goals were analyzed: the lowest gearbox mass and the highest gearbox efficiency. Additionally, the MOOP is carried out in two steps: phase 1 solves the Single-Objective Optimization Problem (SOOP) to close the gap between variable levels, and phase 2 solves the MOOP to determine the optimal primary design factors. Furthermore, the TOPSIS approach was selected to address the MOOP. For the first time, an MCDM technique is used to solve the MOOP of a two-stage helical gearbox considering the power losses during idle motion. When designing the gearbox, the optimal values for three crucial design parameters were ascertained according to the study's results.
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Raghavendra, K., Girisha C, Karnam Bhargava, Khaja Hussain, and Manoj C. "Design and Analysis of Six Speed Constant Mesh Gearbox using Al 7075 Alloy as Gear Material." International Journal for Research in Applied Science and Engineering Technology 11, no. 5 (2023): 5441–50. http://dx.doi.org/10.22214/ijraset.2023.52966.

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Abstract: A design concept for a 6-speed constant mesh gearbox utilizing Al 7075 as the material for helical gears. The objective of this design is to enhance the performance and durability of the transmission system while reducing weight and improving overall efficiency. Al 7075 is chosen as the material for the helical gears due to its excellent strength-to-weight ratio and high fatigue resistance. These properties make it suitable for handling the demanding operating conditions and torque loads experienced in a gearbox. The helical gear configuration offers advantages such as smoother and quieter operation compared to other gear types, reducing noise and vibration levels. The gearbox is designed with six speeds to provide a wide range of gear ratios, enabling optimal engine performance at various vehicle speeds. The constant mesh design ensures quick and seamless gear shifting, enhancing the driving experience and minimizing power losses during gear changes
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Dinh, Van-Thanh, Huu-Danh Tran, Thanh-Danh Bui, et al. "Multi-Objective Optimization of a Two-Stage Helical Gearbox with Second Stage Double Gear-Sets Using TOPSIS Method." Processes 12, no. 6 (2024): 1160. http://dx.doi.org/10.3390/pr12061160.

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The multi-criteria decision-making (MCDM) method was applied in a novel way in this study to the multi-objective optimization problem (MOOP) of designing a two-stage helical gearbox with double gear-sets in the second stage. Finding the best fundamental components to increase gearbox efficiency and decrease gearbox cross-section area was the aim of this study. Three main design factors were chosen for investigation in this work: the first stage gear ratio and the first and second stage coefficients of wheel face width (CWFW). Phase 1 solves the single-objective optimization problem to reduce the gap between variable levels, and phase 2 solves the MOOP to determine the optimal critical design factors. This additionally splits the MOOP into two phases. Additionally, the TOPSIS method was used as an MCDM approach to address the multi-objective optimization issue, and the entropy approach was used to compute the weight criteria. In this study, gearbox efficiency is calculated by considering power losses during idle motion. The multi-objective optimization of a helical gearbox with second stage double gear-sets is addressed using the TOPSIS technique for the first time.
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Dissertations / Theses on the topic "Gearbox design; optimal design; helical gearbox"

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Touimi, Khalil. "Design optimization of a gearbox driven tidal stream turbine Tidal stream turbines: With or without a gearbox?, in Ocean Engineering 170, December 2018 Optimal Design of a Multibrid Permanent Magnet Generator for a Tidal Stream Turbine, in Energies 13(2), 2020." Thesis, Brest, 2020. http://theses-scd.univ-brest.fr/2020/These-2020-SPI-Genie_electrique-TOUIMI_Khalil.pdf.

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L’énergie marémotrice fait l'objet d'une attention croissante en tant que future source potentielle d'énergie renouvelable. Les hydroliennes sont cependant encore en phase de développement et leur technologie n'est pas aussi mature que celle des éoliennes. Outre le fait que cette technologie est encore émergente, les hydroliennes doivent faire face à l’environnement sous-marin hostile dans lequel elles sont immergées. Ces contraintes augmentent la criticité des sous-systèmes des hydroliennes et les rendent moins fiables. Par conséquent, l’amélioration de la fiabilité constitue l'un des défis à relever pour rendre l’énergie marémotrice compétitive en termes de coût par rapport à d'autres types d’énergie, notamment les énergies éolienne et solaire. En effet, la fiabilité des hydroliennes et le coût de l’énergie produite sont principalement affectés par les choix de configuration de la chaîne de conversion d’énergie (entraînement mécanique) et de la génératrice. Dans cette thèse, le type d’entrainement mécanique le plus adapté aux spécifications des hydroliennes est étudié. Trois configurations principales de génératrices et de transmission sont considérées ; à savoir l’hydrolienne à entraînement direct (sans multiplicateur), l'hydrolienne à multiplicateur mécanique et enfin l’hydrolienne à multiplicateur magnétique. Le processus de conception adopté prend en compte la modélisation électromagnétique de la génératrice, le modèle du convertisseur, le modèle de la turbine et les données de vitesse des courants de marées (près de l'île d'Ouessant). Les résultats obtenus à l’issue de ces travaux pourraient être utiles aux concepteurs d'hydroliennes et pourraient leur donner un aperçu sur la faisabilité de chaque type de configuration d’hydroliennes<br>Tidal stream energy is acquiring more and more attention as a future potential renewable energy source. However, tidal stream turbines are still in development stages and their technology is not as mature as wind turbine technology. In addition to the infancy of the technology, tidal stream turbines have to withstand the harsh submarine environment where they are immersed. These constraints increase the criticality of tidal stream turbine subsystems and make them less reliable. Therefore, improving the reliability presents one of the challenges to make such energy competitive in terms of cost compared to other types, notably wind and solar energies. Indeed, the tidal stream turbine reliability and the produced energy cost are mainly affected by the drivetrain and generator configuration choices. In this Ph.D. thesis, suitable drivetrain and generator option choice is investigated for tidal stream turbine specifications. Three main generator and drivetrain configurations are considered which are, the direct- drive tidal stream turbine (gearless), the mechanically geared tidal stream turbine, and the magnetically geared one. The design process considers the electromagnetic modeling of the generator, the converter model, the turbine model, and the tidal current velocity data (near Ouessant island).The investigation-achieved results could be useful for tidal stream turbine designers and could give them a sight on the feasibility of each tidal stream turbine type
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Hall, John Francis 1968. "Design and control of a variable ratio gearbox for distributed wind turbine systems." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-08-6105.

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Wind is one of the most promising resources in the renewable energy portfolio. Still, the cost of electrical power produced by small wind turbines impedes the use of this technology, which can otherwise provide power to millions of homes in rural regions worldwide. To encourage their use, small wind turbines must convert wind energy more effectively while avoiding increased equipment costs. A variable ratio gearbox (VRG) can provide this capability to the simple low-cost fixed-speed wind turbine through discrete operating speeds. The VRG concept is based upon mature technology taken from the automotive industry and is characterized by low cost and high reliability. A 100 kW model characterizes the benefits of integrating a VRG into a fixed-speed stall-regulated wind turbine system. Simulation results suggest it improves the efficiency of the fixed-speed turbine in the partial-load region and has the ability to limit power in the full-load region where pitch control is often used. To maximize electrical production, mechanical braking is applied during the normal operation of the wind turbine. A strategy is used to select gear ratios that produce torque slightly above the maximum amount the generator can accept while simultaneously applying the mechanical brake, so that full-load production may be realized over greater ranges of the wind speed. Dynamic programming is used to establish the VRG ratios and an optimal control design. This optimization strategy maximizes the energy production while insuring that the brake pads maintain a predetermined service life. In the final step of the research, a decision-making algorithm is developed to find the gears that emulate the ratios found in the optimal control design. The objective is to match the energy level as closely as possible, minimize the mass of the gears, and insure that tooth failure does not occur over the design life of the VRG. Recorded wind data of various wind classes is used to quantify the benefit of using the VRG. The results suggest that an optimized VRG design can increase wind energy production by roughly 10% at all of the sites in the study.<br>text
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Book chapters on the topic "Gearbox design; optimal design; helical gearbox"

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Khai, Do Quang, Nguyen Hong Linh, Tran Huu Danh, et al. "Calculating Optimum Main Design Factors of a Two-Stage Helical Gearboxes for Minimum Gearbox Mass." In Advances in Engineering Research and Application. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-22200-9_34.

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Khai, Do Quang, Tran Huu Danh, Bui Thanh Danh, et al. "Determination of Optimum Main Design Parameters of a Two-Stage Helical Gearbox for Minimum Gearbox Cross-Section Area." In Advances in Engineering Research and Application. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-22200-9_37.

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Danh, Tran Huu, Trieu Quy Huy, Bui Thanh Danh, Nguyen Van Trang, and Le Xuan Hung. "Optimization of Main Design Parameters for a Two-Stage Helical Gearbox Based on Gearbox Volume Function." In Advances in Engineering Research and Application. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-22200-9_81.

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Danh, Tran Huu, Nguyen Hong Linh, Bui Thanh Danh, et al. "Effect of Main Design Factors on Two-Stage Helical Gearbox Length." In Advances in Engineering Research and Application. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-22200-9_98.

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Hameed, Syed Shaul, and V. Muralidharan. "Fault Detection in Single-Stage Helical Planetary Gearbox Using Support Vector Machine (SVM) and Artificial Neural Network (ANN) with Statistical Features." In Advances in Design and Thermal Systems. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6428-8_8.

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Gandhi, Ronak D., and Nimeshchandra S. Patel. "Design, Analysis and Modification of 3 Stage Helical Gearbox Casing Using Finite Element Method Considering Different Materials." In Proceedings of International Conference on Intelligent Manufacturing and Automation. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2490-1_10.

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Boletis Elias and Keller Matthias. "Recent Advances on Propeller Shaftlines for the Marine Industry." In Technology and Science for the Ships of the Future. IOS Press, 2018. https://doi.org/10.3233/978-1-61499-870-9-639.

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A vital component on the CP propeller shaft line is the gear box. The gear box is nowadays developed as a high- technology product being integral part of the shaft line system allowing: a) optimal rotational speeds for the propeller and the engine; b) configurational arrangements (e.g. twin- in, single- out layouts); c) propeller two- speed operation; d) integration of propeller hydraulic systems and d) integration of machinery room power systems (power take- in/ power take- off). The added functionalities require advanced product development tools and robust manufacturing technologies. On product development, the design party needs to possess significant product knowledge through applications in lengthy periods of time. The design party must also have significant knowledge of all relevant machinery room equipment &amp;ndash; from the propeller to the power supply unit - allowing the best integrated solution. The manufacturing party needs to have adequate tools and experienced personnel on gear technologies. In our recent working arrangement, Wartsila selected Flender GmbH for contract manufacturing, which is now responsible for the manufacturing and assembly of the product. The paper presents the technical advances for a number of marine market applications showing the added value of the gearbox technologies to the customer.
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Conference papers on the topic "Gearbox design; optimal design; helical gearbox"

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Weinberger, Uwe, Michael K. Otto, and Karsten Stahl. "Closed Form Calculation of Lead Flank Modification Proposal for Spur and Helical Gear Stages." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97993.

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Abstract Due to the growing need for gearboxes to be as lightweight and efficient as possible, it is most important that the gear mesh’s potential is utilized as well as possible. One way of doing that is to define a flank modification that optimally distributes the load over the flank. Best practice for defining a flank modification is to manually check out the load distribution and to define a value of the flank modification. In general, this is an iterative method to get an optimally distributed load. This method can also be automated. To do this, the deformations of the gearbox (shafts, bearings, gear mesh) are calculated. With those results a modification proposal is calculated and applied to the calculation model. As soon as the values for the next additional modification proposal drop under a certain limit, the iteration is finished. This method consumes time and computing power. Additionally, since it is an iteration, does not always converge. A new method for calculating the lead flank modification for all gear stages in the gearbox to be calculated is presented in this paper. The method shown in this paper uses additional degrees of freedom and equations, which are integrated into the linear equation system of the gearbox model. Those degrees of freedom and the equations apply the boundary condition to the model of a constant load distribution. By introducing additional factors in the equations, it is possible to calculate a lead flank modification for an arbitrary load distribution. By integrating these additional degrees of freedom and the equations, only one additional calculation is needed to get a modification proposal. Examples throughout this paper show the results of this method.
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Yang, Saiwei, and Kenny Yu. "Application of Expert System for a Compound Gear Train Design." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0151.

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Abstract A program, written in Turbo-Prolog, was developed to provide a quick and accurate design tool for a compound gear train. The program was based on the expert system methods of backward chaining/ depth first for solution search, fuzzy logic for uncertainty and solution priority, blackboard for opportunistic control of the pc memory space. After initial input of needed information, the system will advise the user some of default design parameters such as the gear module, tooth number, safety factor., et al., by a friendly interactive explanatory facility. The program will then select a suitable material based on the design criteria-bending stress, wearing stress, and material fatigue strength. An optimal solution is then suggested based on the desired design constraints. This package can be used in either an English or a Chinese operating environment. Three examples: lathe gearbox, helical gear set, five speed transmission were illustrated and validated. The program performed the same or compatible solutions to the recommended data in the examples.
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Perret-Liaudet, J., and J. Sabot. "Dynamics of a Truck Gearbox." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0031.

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Abstract This work is concerned with numerous numerical simulations of the overall dynamic behaviour of a parallel helical gear transmission. These results are compared to vibratory measurements made with a simplified gearbox test rig. The dynamic modeling of the elastic components of the gear transmission (gears, shafts, bearings, housing) is realized using the finite element method. Fluctuated gear mesh stiffness is introduced owing to stiffness matrix which describes the elastic coupling between the pinion and the wheel. The kinematic transmission error is introduced as a vibratory excitation source. The equations of motion are established in a truncated modal base deduced from the average characteristics of the structure. A new computing method, called “Spectral Method”, is used for analytical study of a simplified gearbox whose housing is a simple rectangular plate. The numerical results allows us to conclude on the dominent phenomenon of the overall dynamic behaviour of the gear transmission. They exhibit in particular the main characteristics of the transfer between the static transmission error and the vibratory response of the gearbox. A series of vibration measurements made on a gearbox close to that used for the numerical simulations, has confirmed this characteristics.
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Zhang, Xiaoling, Qiang Miao, Hong-Zhong Huang, Dan Ling, and Zhonglai Wang. "Static Analysis of Crane Gearbox QJC-D900." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34613.

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In this paper the 3D model of the three stage helical gearbox was establish using UNIGEAPHICS (UG) firstly, and then the structure static analysis was realized by ANSYS. Accordingly the gear-box’ stress distribution, deformation can be obtained, so the strength and stiffness of the gear-box can be calculated based on the stress and the deformation results, which helps us to evaluate whether the design demand can be satisfied or not. The structure static analysis provides suggestions for the improvement of model design, and the finite element simulation to the large, heavy-duty gear-box reducer can provide technical assurance for the dependability of the production.
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Polly, J., David Talbot, Ahmet Kahraman, Avinash Singh, and Hai Xu. "An Experimental Investigation of Churning Power Losses of a Gearbox." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-68345.

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In this study, load-independent (spin) power losses of a gearbox operating under dip-lubrication conditions are investigated experimentally using a final-drive helical gear pair from an automotive transmission as the example system. A dedicated gearbox is developed to operate a single gear or a gear pair under given speed and temperature conditions. A test matrix that consists of sets of tests with (i) single gears (spur, helical, or representative disks with no teeth), and (ii) helical gear pairs is executed at various temperatures, immersion depths and pinion positions relative to its mating gear. Power losses from single gears and gear pairs at identical operating conditions are compared to quantify the components of the total spin loss in the form of losses due to gear drag, gear mesh pocketing, and bearings and seals.
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Liu, Wen, Biao Gao, Teng-jiao Lin, and Jin-hong Zhang. "Numerical Investigation on Influence Factors of Radiation Noise of the Bridge Crane Helical Gear Reducer." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67076.

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In this paper, the internal dynamic excitation of the gear pair in a helical gear reducer of bridge crane is numerically investigated, taking into account of time-varying mesh stiffness, comprehensive gear error and meshing shock. The integral finite element model of bridge crane reducer gearbox is built by ANSYS software using APDL language. The internal dynamic excitations are imposed on the contact line of gear pair to solve the dynamic response of the gearbox. Using the results of dynamic response as boundary excitation conditions, the acoustic boundary element model is established. The surface sound pressure of gearbox and the radiated noise of field points are solved with SYSNOISE software. In order to verify the feasibility of the simulation method, a vibration &amp; noise test is carried out. With the constant center distance as well as the similar total transmission ratio, the surface sound pressure of gearbox and the radiated noise of field points are calculated with different modules and helix angles. The effects of module and helix angle on the noise radiation of the gearbox are analyzed and discussed. The results provide a useful theoretical guidance for the design of gearboxes.
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7

McDonald, Kyler, Isaac Hong, David Talbot, and Ahmet Kahraman. "Influence of Root Clearance on Helical Gear Pocketing Power Loss." In ASME 2024 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/detc2024-143161.

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Abstract An experimental study is conducted to investigate individual contributions of components to the total spin power loss of a high-speed, gearbox operating under realistic lubricant flow conditions. An experimental test setup capable of operating the test gearbox containing helical gears at desired speeds, temperatures and lubrication conditions is designed and fabricated. Dedicated measurement systems to monitor bearing and oil temperatures as well as the torque loss of the gearbox are devised, and accompanying data analysis systems are developed. A test matrix consisting of two different lubricant flow conditions is defined, each covering a wide range of input speed. These tests are performed with the gearbox having variations of hardware content to separate gear drag, gear mesh pocketing, and bearing power losses from each other. These tests show that the power losses increase with increased lubricant flow rates. They further demonstrate that all three power losses are comparable to each other, and hence, must be considered in evaluating spin power loss of such systems. A parametric study is conducted to investigate the effect of the trapped volume in the gear mesh on pocketing power loss. A family of gears having different addendum coefficients are meshed with the same gear forming different root clearance values. The results of these tests are compared to quantify the influence of root clearance on resultant pocketing power loss.
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Pomrehn, Leonard P., and Panos Y. Papalambros. "Optimal Approximation of Real Values Using Rational Numbers With Application to the Kinematic Design of Gearboxes." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0384.

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Abstract This article proposes a method for optimally approximating real values with rational numbers. Such requirements arise in the design of various types of gear sets, where integer numbers of gear teeth force individual stage ratios to assume rational values. The kinematic design of an 18-speed gearbox, taken from the literature, is analyzed and solved using the proposed method. The method, called sequential exhaustion, sequentially considers each stage of the gearbox design, exhaustively examining each stage. Examination of 94 solutions leads to a pareto-optimal set containing 11 solutions. Further, although the layout of the gearbox is predefined for the kinematic design problem, certain solutions of the problem exhibit “non-reducing” gear pairs, revealing previously unforeseen changes in the gearbox layout.
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Perez, Sergio Enrique, and John Christopher Bachman. "Design of Baja SAE Gearbox for Optimal Performance and Minimum Weight." In Small Powertrain and Energy Systems Technology Conference. SAE International, 2020. http://dx.doi.org/10.4271/2020-32-2311.

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10

Matsuoka, Tetsuya, Hiroyasu Nishikawa, Hideyuki Imai, Kenichi Kijima, Tooru Nishida, and Tatsuhiko Goi. "Light Weight and Low-Misalignment Planetary Gear System for Open Rotor Power Gearbox." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47342.

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The future aero engines expected to have the best fuel efficiency are those with the open rotor propulsion system. It has two rows of propellers rotating in opposite directions. The rotational speeds of the propellers are reduced by a power gearbox. The power gearbox is designed as a differential planetary gear system with double helical teeth. The gearbox for aero engines needs to be lightweight and highly reliable. Misalignment on the gear pair affects adversely the reliability of the gears. The misalignment analysis of the power gearbox based on finite element analysis was carried out. The inclination of the planet spindles associated with the twisting deformation of the planet carrier was identified as the major cause of the misalignment. We developed an innovative design method to achieve the low misalignment and lightweight at the same time by optimizing the stiffness balance of the planet carrier. The optimization analysis was carried out extensively in the design work. The planet carrier design was named Analysis Configured Engineering planet Carrier (ACE CARRIER). A stress measurement was planned to validate the design concept of the ACE CARRIER. A test gearbox was manufactured.
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