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Journal articles on the topic 'Helical gears'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Miltenović, Aleksandar, Milan Banić, Jovan Tanasković, Jelena Stefanović-Marinović, Damjan Rangelov, and Marko Perić. "WEAR LOAD CAPACITY OF CROSSED HELICAL GEARS." Facta Universitatis, Series: Mechanical Engineering 22, no. 1 (2024): 125. http://dx.doi.org/10.22190/fume220114015m.

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The paper presents a wear load capacity of crossed helical gears (gear pair consists of a worm and a helical gear). Crossed helical gears are similar to worm gear pairs, and it is logical to extend the load capacity calculation approach of worm gears for the case of crossed helical gears. One of the disadvantages of crossed helical gear sets is very high running-in wear. The paper explains the transition between running-in and steady-state wear and proposes a joint wear calculation model. The paper outlines a proposal to extend the calculation method for wear load capacity from a worm gear pai

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2

Xu, Weijun, Yadong Zhang, Yunbo Shen, and Cheng Liu. "Measurement and Evaluation Method Study of Alignment Deviation of Double-helical Gear." Journal of Physics: Conference Series 2501, no. 1 (2023): 012012. http://dx.doi.org/10.1088/1742-6596/2501/1/012012.

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Abstract The alignment deviation of the V-vertex of two symmetrically arranged gears with different rotation directions is a unique geometric parameter of double helical gears, which has an important effect on the vibration, noise, and double helical gear service life. Aiming to more accurately represent the manufacturing accuracy of double helical gears and their transmission performance, this paper proposes the meaning of the v-vertex basis the contact line of tooth surface based on the apex characteristics of double helical gears. First, the mathematical model of tooth flank is established

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3

Wang, Bao Ming, Xue Song Mei, Zai Xin Wu, and Chi Bing Hu. "Tooth-Leap Shaping Method for Helical Gears." Applied Mechanics and Materials 217-219 (November 2012): 1769–73. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1769.

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In order to reduce cyclic variation in rotational speed of generated gears or shaper cutter induced by additional rotation during shaping, tooth-leap shaping method for helical gears was proposed. Based on fundamentals of helical gears shaping kinematics, principle of tooth-leap shaping for helical gears was introduced. Furthermore, mathematic models of tooth-leap shaping motions for helical gears are established. Finally, several examples are calculated, results show that cyclic variation in rotational speed of generated helical gear can be reduced largely by tooth-leap shaping method compari

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4

Wang, Cheng. "Influence of rotational speed and torque on meshing efficiency of double helical gear transmission system." Mechanics & Industry 22 (2021): 23. http://dx.doi.org/10.1051/meca/2021025.

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The accuracy of gear meshing efficiency model is the key to study the influence factors of gear meshing efficiency. Experiment is an effective method to verify the theory model. Therefore, the acquisition of experimental value of gear meshing efficiency is particularly important. Taken double helical gears as the research object, on the analysis of a large number of experimental data, the experimental value of gear meshing efficiency for double helical gears are calculated and then the influence of rotational speed and torque on meshing efficiency of double helical gears is studied. Firstly, t

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5

Tian, Fang Yong, Chi Bing Hu, and Yan Cang Jiang. "The Simplest Mathematical Model and Simultaneous-Control Structure for Hobbing Helical Non-Circular Gear." Applied Mechanics and Materials 42 (November 2010): 284–88. http://dx.doi.org/10.4028/www.scientific.net/amm.42.284.

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To solve helical non-circular gears manufacturing problem, the simplest mathematical model for hobbing helical non-circular gear and simultaneous-control structure which the machine tool should have were researchedbeen researched. By comprehensive using of helical teeth meshing principles and helical tooling rack generation method, the simplest mathematical model for hobbing helical non-circular gear was deduced. The structure was a 4-axes simultaneous-control structure. Then, by applying the electronic-gear circuit module and electronic differential combination circuit module developed by the

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6

Shuai, Mo, Ma Shuai, Jin Guoguang, Gong Jiabei, Zhang Ting, and Zhu Shengping. "Design principle and modeling method of asymmetric involute internal helical gears." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 1 (2018): 244–55. http://dx.doi.org/10.1177/0954406218756443.

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In the field of mechanical engineering, involute helical gears are widely used. Compared with the involute spur gear, helical gears have a high bearing strength, more smooth transmission, less impact and less noise. The internal gear pairs have the features of large transmission ratio, low vibration, low noise and low wear and hence are widely used in planetary gear transmission systems. In order to meet the requirements of high strength, high speed of the modern gear transmission systems, a new type of asymmetric involute internal helical gears is designed based on conventional involute gears

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7

Zhu, Chengli. "Application of Similarity Theory and Dimensional Analysis for Helical Gear Fatigue Model Test." Journal of Physics: Conference Series 2218, no. 1 (2022): 012052. http://dx.doi.org/10.1088/1742-6596/2218/1/012052.

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Abstract Gear fatigue test is an important way to verify the reliability of gears, but the test period is too long and costly, especially for the high-speed and heavy-load helical gears, the working process of them are difficult to simulate in the laboratory. For reducing the cost of gear fatigue test, we can use the scaled similar model to replace full-size gear in the fatigue test, process and the results can be applied to the full-size gear according to the similarity principle. In this paper, the similarity principles of helical gears are established with dimensional analysis method. A sca

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8

Boehme, Christoph, Dietmar Vill, and Peter Tenberge. "Enhanced application limits for crossed helical gearboxes using new geometries for smaller sliding paths or smaller contact pressures." MATEC Web of Conferences 287 (2019): 01010. http://dx.doi.org/10.1051/matecconf/201928701010.

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Crossed-axis helical gear units are used as actuators and auxiliary drives in large quantities in automotive applications such as window regulators, windscreen wipers and seat adjusters. Commonly gear geometry of crossed helical gears is described with one pitch point. This article deals with an extended calculation method for worm gear units. The extended calculation method increases the range of solutions available for helical gears. In general, for a valid crossed helical gear pair, the rolling cylinders do not have to touch each other. In mass production of many similar gears, individual g

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9

Chang, D. G., F. Shu, X. B. Chen, and Y. J. Zou. "Calculation of Meshing Efficiency of Helical Gear Based on Double Integral Method." Key Engineering Materials 693 (May 2016): 458–62. http://dx.doi.org/10.4028/www.scientific.net/kem.693.458.

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The meshing efficiency of helical gear transmission is calculated by using the method of double integral. The external involute helical gear meshing is taken and the model of helical gears is simplified by the idea of differential. The instantaneous efficiency equation of a meshing point is derived, and further more the rectangular coordinate system of meshing zone of helical gears is established. The average meshing efficiency of helical gears is achieved by using double integral method. Then, the influence of design parameters is studied and the efficiency formula is verified by comparing th

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10

Osakue, Edward, Lucky Anetor, and Kendall Harris. "Contact stress in helical bevel gears." FME Transactions 49, no. 3 (2021): 519–33. http://dx.doi.org/10.5937/fme2103519o.

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Helical bevel gears have inclined or twisted teeth on a conical surface and the common types are skew, spiral, zerol, and hypoid bevel gears. However, this study does not include hypoid bevel gears. Due to the geometric complexities of bevel gears, commonly used methods in their design are based on the concept of equivalent or virtual spur gear. The approach in this paper is based on the following assumptions, a) the helix angle of helical bevel gears is equal to mean spiral angle, b) the pitch diameter at the backend is defined as that of a helical gear, and c) the Tredgold's approximation is

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11

Mitome, Ken-ichi, Tohru Gotou, and Takeshi Ueda. "Tooth Surface Measurement of Conical Involute Gears by CNC Gear-Measuring Machine." Journal of Mechanical Design 120, no. 2 (1998): 358–63. http://dx.doi.org/10.1115/1.2826981.

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Developed is a new tooth surface measurement of conical involute gears by CNC gear-measuring machines. Advances in the design and production of conical involute gears and its wide applications are demanding the measurement of the conical involute gears using CNC gear measuring machines. Therefore, a new concept called an “equivalent helical gear” is introduced. Thus, a conical involute gear can be measured as a helical involute gear. Experiments demonstrate that this new method gives accurate results and has practical value. Finally tooth surface analysis of a conical involute gears is also pr

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12

Kawasaki, Kazumasa, Isamu Tsuji, and Hiroshi Gunbara. "Manufacturing method of double-helical gears using CNC machining center." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 7-8 (2015): 1149–56. http://dx.doi.org/10.1177/0954406215602288.

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Double-helical gears are usually manufactured using special type of machine tools, such as gear hobbing and shaping machines. In this paper, a manufacturing method of double-helical gears using a CNC machining center instead of the special type of machine tools is proposed. This manufacturing method has the following advantages: (i) the tooth surfaces can be modified arbitrarily, (ii) all we have to do in gear machining is only one machine setting, (iii) the hole and blank diameter and so on except the tooth surface can be also machined, and (iv) the auxiliary apparatus, special type of tools,

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13

Liu, Youyu. "Study of optimal strategy and linkage-model for external non-circular helical gears shaping." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 229, no. 3 (2014): 493–504. http://dx.doi.org/10.1177/0954406214536700.

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As an efficient manufacturing method for gears, shaping technology developed for non-circular helical gears will greatly break through the dilemma of their applications; especially for those gears with part of pitch curves being concave, being not able to be hobbed. Two fundamental linkage-models for external non-circular helical gears were built based on the meshing theory of non-circular gears in this article. According to four linkage methods in plane and two kinds of additional rotation in vertical direction, eight shaping strategies and their practical linkage-models (1)–(8) were develope

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14

Petr, Karel, Vojtěch Dynybyl, and Jan Křepela. "Experimental Tests and FEM Simulations of Flank Breakage on Tooth of Gears with Respect to Different Nitrided Depths." Applied Mechanics and Materials 732 (February 2015): 257–60. http://dx.doi.org/10.4028/www.scientific.net/amm.732.257.

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This article deals with the reasons for gear failure - Flank breakage on tooth of spur gears with helical and straight involute gears. Gear flank breakage can be observed on edge zone-hardened gears. The creation of flank and tooth breakage and FEM simulation of flank breakage on tooth are described in this article. In the article are also described and short photo documentation from real load tests on mechanically closed stand for testing of gearing with helical gears and different nitrided depth.

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15

Miltenovic, A., V. Nikolic, and M. Banic. "Wear load capacity of crossed helical gears with wheel made from sintered steel." Science of Sintering 47, no. 2 (2015): 153–63. http://dx.doi.org/10.2298/sos1502153m.

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Crossed helical gears have an important position in power transmission. Important advantages of the crossed helical gears are the small design, the realization of high ratios in one stage, and the low noise characteristics. The paper presents a theoretical and experimental research of mesh efficiency, tooth friction coefficient and wear for a wheel of crossed helical gears made of Fe1.5Cr0.2Mo sintered steel with sinter-hardening treatment and without additional treatment. The calculation method is also given for the determination of wear load capacity of the worm with a helical gear made of F

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16

Liu, Yanping, Yongqiang Zhao, Ming Liu, and Xiaoyu Sun. "Parameterized High-Precision Finite Element Modelling Method of 3D Helical Gears with Contact Zone Refinement." Shock and Vibration 2019 (July 7, 2019): 1–17. http://dx.doi.org/10.1155/2019/5809164.

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In order to perform a tooth contact analysis of helical gears with satisfactory accuracy and computational time consuming, a parameterized approach to establish a high-precision three-dimension (3D) finite element model (FEM) of involute helical gears is proposed. The enveloping theory and dentiform normal method are applied to deduce the mathematical representations of the root transit curve as well as the tooth profile of the external gear in the transverse plane based on the manufacturing process. A bottom-up modelling method is applied to build the FEM of the helical gear directly without

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17

Litvin, F. L., I. H. Seol, D. Kim, et al. "Kinematic and Geometric Models of Gear Drives." Journal of Mechanical Design 118, no. 4 (1996): 544–50. http://dx.doi.org/10.1115/1.2826926.

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A methodology is proposed for the modification of gear tooth surfaces that reduces the impact of gear drive misalignment, the shift of the bearing contact (accompanied in some cases with edge contact), and the occurrence of discontinuous functions of transmission errors. The proposed approach is tested by computerized simulation of meshing and contact for unloaded and loaded gear drives. Applications of geometry modifications to the design of spur and helical involute gears, double-circular helical gears, face-gear drives, face-milled spiral bevel gears with constant tooth height and worm-gear

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18

Wu, Jun-Long, Chia-Chang Liu, Chung-Biau Tsay, and Shigeyoshi Nagata. "Mathematical Model and Surface Deviation of Helipoid Gears Cut by Shaper Cutters." Journal of Mechanical Design 125, no. 2 (2003): 351–55. http://dx.doi.org/10.1115/1.1564570.

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Crossed-axis helical gears and hypoid gears are two conventional crossed-axis power transmission devices. Helipoid gears, a novel gear proposed herein, possess the merits of the crossed-axis helical and hypoid gears. A mathematical model of the proposed helipoid gear cut by shapers is also derived according to the cutting mechanism and the theory of gearing. The investigation shows that the tooth surface varies with the number of teeth of the shaper. Computer graphs of the helipoid gear are presented according to the developed gear mathematical model, and the tooth surface deviations due to th

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19

Wang, Cheng, Shouren Wang, and Gaoqi Wang. "Research on Dynamic Model of Double Helical Gear Pair Based on TCA and LTCA." Volume 24, No 3, September 2019 24, no. 3 (2019): 476–84. http://dx.doi.org/10.20855/ijav.2019.24.31302.

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Numerous dynamic models of spur gears, helical gears, bevel gears, and face gears can be found in various studies. However, studies that focus on the dynamic model of a double helical gear pair are quite limited. The author proposed a model of a double helical gear pair by only considering the axial vibration. The author did not consider the friction and multiple backlashes in the proposed model. The friction force of the tooth surface and backlash are important factors that can cause complex non-linear phenomena in gear pairs. Therefore, a dynamic model of a double helical gear pair that take

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20

Gopal, Ram, Rajiv Suman, and R. S. Jadoun. "Optimization of Helical Gear Design Using Genetic Algorithm for Center Distance." International Journal of Advance Research and Innovation 4, no. 3 (2016): 91–98. http://dx.doi.org/10.51976/ijari.431616.

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The helical gears are employed to transmit motion between parallel shafts. These gears can also be used for transmitting motion between non-parallel, non-intersecting shafts. Helical gears are similar to spur gears except that the gears teeth are at an angle with the axis of the gears. In a genetic algorithm, populations of individuals, which are potential solutions to the optimization problem, undergo a sequence of unary and higher order transformations (also known as mutations and crossovers respectively). Genetic algorithms are being widely used for optimization, search and neural network s

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21

SHIVAKUMAR, S., and SUNILKUMAR H. S. MR. "ANALYSIS OF MECHANICAL PROPERTIES OF HELICAL GEARS." JournalNX - A Multidisciplinary Peer Reviewed Journal NITET2017 (March 16, 2017): 55–59. https://doi.org/10.5281/zenodo.1461379.

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 Gear is the important member for transmission of power. Different types of gears are used for this power transmission, and helical gears are used in power transmission of Permanent Magnet DC Motors. The main reason for the failure of the gears are bending and surface strength, thus the analysis of these parameters become the most popular filed of interest for the researchers to minimize this failure. In aim of this paper is to different types of stresses occurring in the helical gears of permanent magnet DC motor with analytical solutions as well as FEM solution with the help of ANSYS 14

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22

Jiang, Hanjun. "Analysis of time-varying friction excitations in helical gears with refined general formulation." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 229, no. 13 (2015): 2467–83. http://dx.doi.org/10.1177/0954406215583886.

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Time-varying sliding friction force and friction torque are regarded as non-negligible excitation sources of vibration and noise in gears. The sliding friction force primarily excites the motion along the off-line-of-action direction, which transmits vibration to the housing through shafts and bearings and then radiates noise. Since the contact line intersects with the pitch line, and the directions of the friction forces are opposite on both sides of the pitch line, the calculation of the friction excitations in helical gears becomes more difficult, especially in the high contact ratio helica

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23

Litvin, F. L., N. X. Chen, J. Lu, and R. F. Handschuh. "Computerized Design and Generation of Low-Noise Helical Gears with Modified Surface Topology." Journal of Mechanical Design 117, no. 2A (1995): 254–61. http://dx.doi.org/10.1115/1.2826131.

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An approach for the design and generation of low-noise helical gears with localized bearing contact is proposed. The approach is applied to double circular arc helical gears and modified involute helical gears. The reduction of noise and vibration is achieved by application of a predesigned parabolic function of transmission errors that is able to absorb a discontinuous linear function of transmission errors caused by misalignment. The localization of the bearing contact is achieved by the mismatch of pinion-gear tooth surfaces. Computerized simulation of meshing and contact of the designed ge

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24

Chen, Zhen, Ming Zeng, and Alfonso Fuentes-Aznar. "Geometric design, meshing simulation, and stress analysis of pure rolling cylindrical helical gear drives." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 15 (2020): 3102–15. http://dx.doi.org/10.1177/0954406220912265.

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The geometric design, meshing performance, and mechanical behavior of pure rolling helical gear drives are presented. Parametric equations for contact curves on the pinion and gear are determined by coordinate transformation of the active designed pure rolling meshing line for the whole cycle of meshing. Moreover, parametric equations for the tooth surfaces of helical gears with convex-to-convex meshing type are derived according to the motion of generatrices in the transverse section along the calculated contact curves. Then, the basic design parameters are analyzed and formulas for calculati

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25

Zeng, Qing Dun, and Feng Zhe Tan. "Finite Element Analysis of Gear Contact on Two-Speed Transmission in Electric Cars." Applied Mechanics and Materials 341-342 (July 2013): 443–46. http://dx.doi.org/10.4028/www.scientific.net/amm.341-342.443.

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The main content of gear design is the strength design, and the contact strength design of gears is the main heart of the strength design, because the stress and deformation of gears directly affect their safety and service life and concern whether vehicle transmissions work smoothly. Therefore it is necessary to perform a finite element analysis for the gear contact in transmission. Based on the contact characteristic of helical gears, a three-dimensional solid model was established by using the software Pro/E, and the contact stress analysis of gears was carried out by the software ANSYS Wor

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26

Jia, Chao, and Ge Zhang. "Investigation on the Dynamic Characteristics of Non-Orthogonal Helical Face Gears with Higher-Order Tooth Surface Modification." Mathematics 12, no. 3 (2024): 366. http://dx.doi.org/10.3390/math12030366.

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A study on the dynamic characteristics of non-orthogonal helical face gears with higher-order tooth surface modification is presented in this article. The method of designing the non-orthogonal helical face gears with higher-order tooth surface modification is described. First, MATLAB programming that can be used for the parameterized 3D mesh calculations of non-orthogonal helical face gears with higher-order tooth surface modification are completed. Second, the calculated grid nodes from the MATLAB programming are imported into ABAQUS to generate a three-dimensional mode. The meshing stiffnes

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27

Li, Xue Yi, Chao Chao Li, Bin Bing Huang, and San Shuai Li. "Contact Fatigue Analysis of Mine Helical Cylindrical Gear Based on ANSYS Workbench." Applied Mechanics and Materials 246-247 (December 2012): 12–16. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.12.

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A general method for calculating contact fatigue strength of Mine helical cylindrical gear was studied in this paper. Both the Solid model and finite element model were created in ANSYS. Based on the fatigue analysis module of the ANSYS Workbench, The contact fatigue strengths of the helical cylindrical gear pair were calculated, and corresponding contact fatigue lives and safety factors of two gears in any meshing position were obtained and shown in contour map. A simulation calculation for a pair of mine helical cylindrical gears was carried out. Simulation results show that calculation of t

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28

Atanasiu, Virgil, Cezar Oprişan, and Dumitru Leohchi. "The Influence of the Pinion-Shaft Deflection on the Dynamic Characteristics of Helical Gear Pairs." Applied Mechanics and Materials 658 (October 2014): 17–22. http://dx.doi.org/10.4028/www.scientific.net/amm.658.17.

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This study presents a dynamic model of helical gears for analyzing the effect of pinion-shaft flexibility on the dynamic behavior of helical gears. In the analysis, the time-varying mesh stiffness is determined in relation with the geometry of the gear pair and incorporates the deflection of the pinion–shaft. A comparison analysis is presented for the dynamic transmission error response of gear pairs supported with a rigid and a flexible shaft system. The results show that the pinion-shaft deflection must be included in the dynamic analysis since they can strongly affect the dynamic characteri

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29

Tang, Huadong, Gang Lv, Zongyuan Luo, et al. "Multi-objective optimization of helical gear transmission geometric parameters using MOPSO." Journal of Physics: Conference Series 2853, no. 1 (2024): 012070. http://dx.doi.org/10.1088/1742-6596/2853/1/012070.

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Abstract Helical gears are widely used in mechanical devices, but insufficient tooth strength can easily lead to premature failure, which is an urgent problem to be solved. To overcome this challenge, this paper introduces a multi-objective particle swarm optimization algorithm, which comprehensively considers the comprehensive effects of modification coefficient, number of teeth, and modulus on the performance of helical gears. By constructing a mathematical model with the geometric parameters of helical gears as the core design variables, aiming to minimize the difference between the maximum

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Prof., Miss. Kachare S.S., and Miss. Phate J.M. Prof. "A REVIEW ON STUDY OF BENDING STRESS AND CONTACT STRESS OF HELICAL GEAR AS CALCULATED BY AGMA STANDARD AND FEA." JournalNX - A Multidisciplinary Peer Reviewed Journal QIPCEI2K18 (May 1, 2018): 224–26. https://doi.org/10.5281/zenodo.1412310.

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Gears are one of the most critical components in mechanical power transmission systems. The bending and surface strength of the gear tooth are considered to be one of the main contributors for the failure of the gear in a gear set. Thus, analysis of stresses has become popular as an area of research on gears to minimize or to reduce the failures and for optimal design of gears. The helical gears can fail due to excessive bending stress at the root of gear tooth or surface contact stresses. This can be avoided only by minimizing bending stresses and contact stress or by modifying the geometry o

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31

Ahmed, Bassam Ali. "Identifying the influence of dimensional parameters on the stresses and deformations of two helical gears." Eastern-European Journal of Enterprise Technologies 5, no. 7 (119) (2022): 76–83. http://dx.doi.org/10.15587/1729-4061.2022.266261.

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In this research paper, focusing on the basic variables of the gear modeling process and setting its dimensions to see which gears are capable of withstanding transmission operations and its rigidity was done. Because one of the most prominent transmission mechanics is gears, as the types of gears are numerous and common, and one of the most prominent types of gears is the helical gear. The helical gear is one of the most widely used and widespread gears in mechanical fields due to the increase in the contact area during the interlock process, as this increase reduces noise during gear rotatio

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32

Yousef, Samy, T. A. Osman, M. Khattab, Ahmed A. Bahr, and Ahmed M. Youssef. "A New Design of the Universal Test Rig to Measure the Wear Characterizations of Polymer Acetal Gears (Spur, Helical, Bevel, and Worm)." Advances in Tribology 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/926918.

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This work aims to study the wear characterization of common types of acetal polymer gears (spur, helical, bevel, and worm) using a new TS universal test rig, in order to obtain reliable results and as a reference when compared with acetal nanocomposite gears later. The TS universal test rig consists of three different units that are connected by a main driver shaft and a pair of constantly meshing metal spur gears, which transfer power to the bevel and worm test units. The first unit is used to test the bevel gears, the second unit is used to test the spur and helical gears, and the third unit

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33

Bucur, M., S. Cananau, R. F. Mirica, and S. Gabroveanu. "Comparative analysis concerning the state of stress for involute gears using ISO, AGMA standards and Finite Element Method." IOP Conference Series: Materials Science and Engineering 1262, no. 1 (2022): 012002. http://dx.doi.org/10.1088/1757-899x/1262/1/012002.

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Researchers must review numerous standardized criteria that determine the design of mechanical transmissions with gears in order to keep up with current developments in mechanical engineering practice. In classical design there are various standards concerning the calculation of load capacity of spur and helical gears. Both of them are further used to evaluate the state of stress due to bending of the tooth. There are many criteria for calculating the load capacity of spur and helical gears in traditional design. Both of them are also used to assess the state of stress caused by tooth bending.

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Yuan, Bing, Shan Chang, Geng Liu, Lan Liu, and Lehao Chang. "Sensitivity Analysis of Helical Gears with Tooth Surface Modification to Applied Torque and Gear Misalignment." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 36, no. 6 (2018): 1085–92. http://dx.doi.org/10.1051/jnwpu/20183661085.

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The numerical calculation model of time-varying mesh stiffness, static transmission error and composite mesh error of modified helical gears is developed based on loaded tooth contact analysis (LTCA) model. To minimize the fluctuation of vibration excitation force, the optimal modification parameters of three modification methods under designed applied torque and ideal tooth contact condition are determined, and the effects of three modification methods on time-varying mesh stiffness, static transmission error and composite mesh error are analyzed. In order to analyze the sensitivity of the th

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35

Kanagaraj, Anandan, Senthilkumar Pandurangan, Saravavan Durai, and Arunkumar Gopi. "The Design and Analysis of the Helical Gear in the Car Gear Box for the Slag Port Transfer." International Journal of Mechanical Engineering and Applications 12, no. 3 (2024): 71–80. http://dx.doi.org/10.11648/j.ijmea.20241203.12.

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The design and analysis of helical gears with involutes profiles is the primary focus of this study. The most widely utilized gearing system in use today is the involutes gear profile. Power and torque are typically transmitted through them. When compared to other forms of transmission, the efficiency of power transmission via gears is extremely high. Bending and contact stress are the main causes of gear tooth failure. The current study examines helical gear, which has to do with slag transfer in the steel production sector. The most affected stress concentrated location of any set of gears i

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36

Kahraman, A. "Dynamic Analysis of a Multi-Mesh Helical Gear Train." Journal of Mechanical Design 116, no. 3 (1994): 706–12. http://dx.doi.org/10.1115/1.2919440.

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In this paper, the dynamic behavior of a multi-mesh helical gear train has been studied. The gear train consists of three helical gears, with one of the gears in mesh with the other two. A three dimensional dynamic model which includes transverse, torsional, axial and rotational (rocking) motions of the flexibility mounted gears has been developed. Two different loading conditions have been identified. In case-I, the system is driven by the gear in the middle, and in case-II, the system is driven by one of the gears at either end of the gear train. The phase difference between the two gear mes

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Asgharifard-Sharabiani, P., A. Hannaneh, and M. Nikkhah-Bahrami. "Calculation of helical gear’s basic parameters using COP-data acquired by optical 3D digitizer." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 12 (2011): 2953–62. http://dx.doi.org/10.1177/0954406211409841.

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Gears are industrial components with a precise geometry. Identification of their basic parameters plays an important role in their reverse design and quality control process. This article describes a new approach for the calculation of helical gear’s basic parameters using optical data acquired by 3D digitizer. This approach is implemented by acquiring cloud-of-points data (COP-data) from the bearing seats and gear tooth surface. Cylinder surface fitting through COP-data acquired from bearing seats is performed for the determination of gear axis of rotation. In a final step, involute helicoid

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Li, Wen Long, Li Wei, and Shao Jun He. "Shaping Principle in Hobbing and Analysis on Errors of Involute Gear Tooth Surfaces." Advanced Materials Research 189-193 (February 2011): 4173–76. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.4173.

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An involute helical surface is one of the surfaces widely used in engineering. There are four characteristics lines ( involute, helix, straight generatrix, pathofcontact) on it. On the basis of characteristic lines, the shaping principle in hobbing is studied, the error characteristics and their interrelations are analyzed. The analysis formula of involute gear tooth surface errors is given for spur gears and helical gears.

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Zhu, C., H. Wang, L. Zhang, and X. Du. "Contact characteristics of helical conical gears used for V-drive marine transmissions." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 1 (2011): 216–24. http://dx.doi.org/10.1177/09544062jmes1935.

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This article investigates the load-carrying ability of helical conical gears used in transmissions with intersecting and crossed axis for V-drive marine transmission. Mathematical models of helical conical non-involute gears, which can realize line contact, were established on the basis of the conjugated theory. Loaded tooth contact analysis was performed to examine the meshing and bearing contact of the helical conical gear pairs. The contact area was measured in an experiment and compared with theoretical results, and good agreement was observed.

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Chen, Zhen, Bo Lei, Ling Qin, Guoting Qiu, and Alfonso Fuentes-Aznar. "Computerized Design, Simulation of Meshing and Stress Analysis of External Helical Gear Drives Based on Critical Control Points." Energies 15, no. 12 (2022): 4290. http://dx.doi.org/10.3390/en15124290.

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Helical gears are widely used in powertrain systems. The computerized design of a new type of non-generated external helical gears based on critical control points at the transverse tooth profile is presented. The entire tooth profile is divided into different parts including the active tooth profile and fillet by control points. Involutes, circular arcs and Hermite curves are defined between two critical control points and smoothly connected with each other at those control points. The parametric equations for the tooth surfaces are derived considering the position of the mentioned control po

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Putra, Daffa Surya, and Deri Teguh Santoso. "BEVEL GEAR DESIGN FOR DIFFERENTIAL TRANSMISSION ON THE MIO M3 125 MOTORCYCLE." T R A K SI 23, no. 1 (2023): 87. https://doi.org/10.26714/traksi.23.1.2023.87-117.

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The gears in the transmission system only get a twisting moment, there is teeth contact between the pinion and gear. Contact between rough teeth can causing non-uniform contact forces between teeth and other teeth, caused when planning is not thorough. The design of the helical gear includes calculating the dimensions, safety factor, and stresses that occur on the machine elements. This must be considered in designing helical gears so that they can be used properly. The results of the design of the helical gear pair use a 1.5mm module, a pinion head diameter of 27.2 mm while the gear is 75.4mm

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Wu, Yong Jun, Jian Jun Wang, and Qin Kai Han. "Static/Dynamic Contact Finite Element Analysis for Tooth Profile Modification of Helical Gears." Applied Mechanics and Materials 86 (August 2011): 384–88. http://dx.doi.org/10.4028/www.scientific.net/amm.86.384.

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A precise approach for the tooth profile modification (TPM) of helical gear is presented in the paper based on the static contact finite element analysis (FEA). The high-precision finite element model of helical meshing gear pairs is established. The type and amount of TPM are accurately determined by the static contact FEA results. The dynamic contact simulations of helical gears with and without tooth modification are investigated to estimate the vibration reduction effect of the TPM. Moreover the numerical simulations are compared with the experimental results. Both results show that the pr

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Götz, Joshua, Sebastian Sepp, Michael Otto, and Karsten Stahl. "Low excitation spur gears with variable tip diameter." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 5 (2021): 1275–85. http://dx.doi.org/10.3397/in-2021-1799.

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One important source of noise in drive trains are transmissions. In numerous applications, it is necessary to use helical instead of spur gear stages due to increased noise requirements. Besides a superior excitation behaviour, helical gears also show additional disadvantageous effects (e.g. axial forces and tilting moments), which have to be taken into account in the design process. Thus, a low noise spur gear stage could simplify design and meet the requirements of modern mechanical drive trains. The authors explore the possibility of combining the low noise properties of helical gears with

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Hildebrand, Lucas, Florian Dangl, Constantin Paschold, Thomas Lohner, and Karsten Stahl. "CFD Analysis on the Heat Dissipation of a Dry-Lubricated Gear Stage." Applied Sciences 12, no. 20 (2022): 10386. http://dx.doi.org/10.3390/app122010386.

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Power losses in gearboxes result in frictional heating. Sufficient heat transfer from the gearbox to the environment is required for reliable operation. The heat dissipation from gears is linked to their interaction with fluids in the gearbox. Recent research has demonstrated the use of Computational Fluid Dynamics (CFD) to predict the gearbox fluid flow and no-load losses in an isothermal manner. This study focuses on a numerical analysis of the heat dissipation within a dry-lubricated gearbox under atmospheric conditions. Spur gears and helical gears are investigated. The air flow in the gea

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Bassam, Ali Ahmed. "Identifying the influence of dimensional parameters on the stresses and deformations of two helical gears." Eastern-European Journal of Enterprise Technologies 5, no. 7(119) (2022): 76–83. https://doi.org/10.15587/1729-4061.2022.266261.

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In this research paper, focusing on the basic variables of the gear modeling process and setting its dimensions to see which gears are capable of withstanding transmission operations and its rigidity was done. Because one of the most prominent transmission mechanics is gears, as the types of gears are numerous and common, and one of the most prominent types of gears is the helical gear. The helical gear is one of the most widely used and widespread gears in mechanical fields due to the increase in the contact area during the interlock process, as this increase reduces noise during gear rotatio

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Wen, Jianmin, Haoyu Yao, Qian Yan, and Bindi You. "Research on Time-Varying Meshing Stiffness of Marine Beveloid Gear System." Mathematics 11, no. 23 (2023): 4774. http://dx.doi.org/10.3390/math11234774.

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Beveloid gears have the advantages of compensating for axial error, providing smooth transmission, and eliminating turning error. Therefore, they are widely used in applications that require high transmission accuracy and stability. However, research on calculating the time-varying meshing stiffness of beveloid gears is still limited, and there is an urgent need to propose a method that can calculate the meshing stiffness of beveloid gears quickly and accurately. We first established the tooth profile expressions, assuming a pair of beveloid gears meshing with the same rack, and the contact li

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Munro, R. G., L. Morrish, and D. Palmer. "Gear transmission error outside the normal path of contact due to corner and top contact." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 213, no. 4 (1999): 389–400. http://dx.doi.org/10.1243/0954406991522347.

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This paper is devoted to a phenomenon known as corner contact, or contact outside the normal path of contact, which can occur in spur and helical gear transmission systems under certain conditions. In this case, a change in position of the driven gear with respect to its theoretical position takes place, thus inducing a transmission error referred to here as the transmission error outside the normal path of contact (TEo.p.c). The paper deals with spur gears only, but the results are directly applicable to helical gears. It systematizes previous knowledge on this subject, suggests some further

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Abdullah, Mohammad Qasim, and Mansour Ali Ismael. "GENERATION AND SIMULATION OF MESHING FOR INVOLUTE HELICAL GEARS." Journal of Engineering 15, no. 2 (2009): 3743–55. http://dx.doi.org/10.31026/j.eng.2009.02.16.

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A new method for generation and simulation of meshing for involute helical gears is presented. Theapproaches proposed for generation are based on the imaginary application of two rack-cutters onefor pinion and the other for gear generation. The proposed simulation of meshing of aligned andmisaligned helical gears gives (i) the shift of the bearing contact (real contact path) on pinion andgear tooth surfaces, (ii) the function of transmission errors.

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Yao, Gaowei, Gang Liu, Jianxin Su, Hongbin Yang, Mingxuan Jin, and Xiao Wei. "Analysis of the Effect of Three-Dimensional Topology Modification on Temperature Field and Thermal Deformation of Internal Helical Gears Pair." Applied Sciences 15, no. 11 (2025): 6244. https://doi.org/10.3390/app15116244.

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The transmission accuracy and meshing performance of the gearbox is determined by the internal helical gears pair. Thermal deformation of internal helical gears pair is derived from sliding friction between the contacting teeth surface, resulting in shock, vibration, and misalignments. The purpose of this paper is to compare the influence of a modified gear and an unmodified gear on the temperature field and transmission characteristics of a planetary gear system under the same working conditions. This study presents an innovative temperature field model for gear pairs utilizing Surf152 elemen

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Park, Chan Il. "Initial Behavior of Speed Increasing Helical Gears by Torque Fluctuation." Applied Mechanics and Materials 86 (August 2011): 813–16. http://dx.doi.org/10.4028/www.scientific.net/amm.86.813.

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This work studied initial impact behavior of speed increasing helical gears with backlash and the change of mesh stiffness by torque fluctuation. For this purpose, single degree of freedom equations of motion of helical gears with the periodical change of mesh stiffness and backlash, and its dimensionless form were derived. The Newmark beta method and the Newton-Raphson method were used to obtain nonlinear behavior of helical gears. Many excitation frequencies initially caused the tooth separation and single-sided impacts of the gear pair and eventually led to the normal tooth contact. However

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