Study of the influence mechanism of pitch deviation on cylindrical helical gear meshing stiffness and vibration noise

Comprehensive meshing stiffness and single tooth meshing stiffness are calculated by tooth contact analysis and load tooth contact analysis program. The corner meshing impact model is proposed. Nonlinear dynamic model of helical gear transmission system is established in this paper considering time-varying meshing stiffness excitation, transmission error excitation, corner meshing impact excitation, and the backlash excitation. Take the ship’s helical gear transmission system as an example, the mesh impact force is derived and the primary factors that produce noises are discussed. The effects which the mesh impact brings to vibration characteristics of the gear dynamic system are concluded. Meshing impact has an inevitable effect on the vibration of the dynamic system. Impact excitation costs 8.5% in maximum of vibration acceleration response, 31% in maximum of instantaneous acceleration, and 4.9% in maximum of spectral component amplitude.

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Deformation and meshing stiffness analysis of cracked helical gear pairs

Engineering Failure Analysis ◽

10.1016/j.engfailanal.2018.08.028 ◽

2019 ◽

Vol 95 ◽

pp. 30-46 ◽

Cited By ~ 15

Author(s):

Yifan Huangfu ◽

Kangkang Chen ◽

Hui Ma ◽

Linyang Che ◽

Zhanwei Li ◽

...

Keyword(s):

Helical Gear ◽

Stiffness Analysis ◽

Meshing Stiffness

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The Load Distribution with Modification and Misalignment and Thermal Elastohydrodynamic Lubrication Simulation of Helical Gears

Global Journal of Researches in Engineering ◽

10.34257/gjreavol20is1pg17 ◽

2020 ◽

pp. 17-33

Author(s):

Jian-hua Xue ◽

Zhen-hua Zhang ◽

Huan-rui Wang

Keyword(s):

Load Capacity ◽

Length Distribution ◽

Elastohydrodynamic Lubrication ◽

Transmission Error ◽

Helical Gear ◽

Temperature Fields ◽

Meshing Stiffness ◽

Uniform Model ◽

Thermal Ehl ◽

Maximum Contact

A non-uniform model of the load per unit of length distribution of helical gear with modification and misalignment was proposed based on the meshing stiffness, transmission error, and load-balanced equation. The distribution of unit-lineload, transmission error (TE), and contact press of any point on the contact plane were calculated by the numerical method. The feature coordinate system was put forward to implement the helical preliminary design and strength rating.The thermal elastohydrodynamic lubrication (EHL) model of helical gear was established, and the pressure, film, and temperature fields were obtained from the thermal EHL model.The maximum contact temperature and minimum film thickness solved by thermal EHL were applied to check the scuffing load capacity. The highest flash temperature and thinnest film occur in the dedendum of the pinion. The thermal EHL method to evaluate the scuffing load capacity is effective.

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Bending-torsional-axial-pendular nonlinear dynamic modeling and frequency response analysis of a marine double-helical gear drive system considering backlash

Journal of Low Frequency Noise Vibration and Active Control ◽

10.1177/14613484211065742 ◽

2021 ◽

pp. 146134842110657

Author(s):

Hao Dong ◽

Yue Bi ◽

bo Wen ◽

Zhen-bin Liu ◽

Li-bang Wang

Keyword(s):

Frequency Response ◽

Dynamic Modeling ◽

External Load ◽

Transmission Error ◽

Helical Gear ◽

Gear System ◽

Time Varying ◽

Vibration Displacement ◽

Meshing Stiffness ◽

Nonlinear Dynamic Modeling

The double-helical gear system was widely used in ship transmission. In order to study the influence of backlash on the nonlinear frequency response characteristics of marine double-helical gear system, according to the structural characteristics of double-helical gear transmission, considering the time-varying meshing stiffness, backlash, damping, comprehensive transmission error, external load excitation, and other factors, a three-dimensional bending-torsional-axial-pendular coupling nonlinear dynamic modeling and dynamic differential equation of 24-DOF double-helical gear transmission system were established. The Runge–Kutta numerical method was used to analyze the influence of backlash, time-varying meshing stiffness, damping, error and external load excitation on the amplitude frequency characteristics. The results show that the backlash can cause the runout of the double-helical gear system, and the system has first harmonic and second harmonic response. With the increase of backlash, the amplitude of the system increases and the jumping phenomenon remains unchanged. The amplitude frequency response of the system is stimulated by time-varying meshing stiffness and comprehensive transmission error, and restrained by damping and external load excitation. The vibration displacement amplitude of the system increases with the increase of vibration displacement and has little effect on the state change of the system. The vibration test of double-helical gear is carried out. The frequency response components obtained by numerical simulation are basically consistent with the experimental results, which proves the correctness of the theoretical calculation. It provides a technical basis for the study of vibration and noise reduction performance of double-helical gear.

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Research on Time-Varying Meshing Stiffness of Helical Gear Considering Tribo-dynamic Behavior

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) ◽

10.1109/icmae.2018.8467672 ◽

2018 ◽

Author(s):

Dong Huili ◽

Niu Tao

Keyword(s):

Dynamic Behavior ◽

Helical Gear ◽

Time Varying ◽

Meshing Stiffness

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An Improved Method to Calculate the Meshing Stiffness of Helical Gear

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.482-484.1285 ◽

2012 ◽

Vol 482-484 ◽

pp. 1285-1289

Author(s):

Wei Yang ◽

Yi Lin Huang ◽

Hong Sun

Keyword(s):

Contact Line ◽

Helical Gear ◽

Gear Pair ◽

Improved Method ◽

Meshing Stiffness ◽

Gear Transmission System ◽

Engagement Process ◽

Helical Gear Pair ◽

Gear Engagement ◽

Meshing Process

The meshing-stiffness of a helical gear pair is one of important parameters to study dynamic characteristics of gear transmission system. However, the equation to solve the meshing stiffness is very complex and difficult to get it. We put up with an improved method to quickly calculate the meshing stiffness through analyzing the meshing process and characteristics of the helical gear pair. The obtained time-variant meshing stiffness curve matches the theoretic stiffness curve very well. The result is shown that the method for calculating contact line based on the helical gear engagement process and characteristics, can be understand intuitively and easily.

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Analysis of time-varying meshing stiffness of helical gear pair with tooth surface spalling

Journal of Physics Conference Series ◽

10.1088/1742-6596/1820/1/012131 ◽

2021 ◽

Vol 1820 (1) ◽

pp. 012131

Author(s):

Yongjie Zhang ◽

Wen Liu ◽

Chen Song ◽

Tengjiao Lin ◽

Mingxu Duan

Keyword(s):

Helical Gear ◽

Tooth Surface ◽

Time Varying ◽

Gear Pair ◽

Meshing Stiffness ◽

Helical Gear Pair

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Investigation of Load Sharing and Dynamic Load Characteristics of a Split Torque Transmission System with Double-Helical Gear Modification

Shock and Vibration ◽

10.1155/2021/9912148 ◽

2021 ◽

Vol 2021 ◽

pp. 1-22

Author(s):

Xuan Liu ◽

Zongde Fang ◽

Haitao Jia ◽

Ning Zhao ◽

Yunbo Shen ◽

...

Keyword(s):

Dynamic Load ◽

Load Sharing ◽

Helical Gear ◽

Transmission System ◽

Time Varying ◽

Tooth Contact Analysis ◽

Meshing Stiffness ◽

Torque Transmission ◽

Load Characteristics ◽

Split Torque

A new dynamic model for a two-input two-path split torque transmission system which considers meshing error, time-varying meshing stiffness, and meshing-in impact is proposed. Time-varying meshing stiffness and meshing-in impact of each gear pair are accurately calculated based on tooth contact analysis and loaded tooth contact analysis. Equivalent displacements of eccentricity error and installation error along the meshing line of second- and third-stages gears are derived. The modified tooth surface of a third-stage double-helical gear is obtained by optimizing the amplitude of static loaded transmission error and meshing-in impact via nondominated sorting genetic algorithm-II (NSGA-II). Influence of modification on load sharing and dynamic load characteristics of split torque transmission system is investigated. The results indicate that the system’s dynamic meshing force increases when meshing-in impact is accounted for, which is unfavorable for the transmission. Following the modification of a double-helical gear, the dynamic load characteristics of the split torque transmission system are significantly improved, while its load sharing characteristics are improved to a certain extent.

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