scholarly journals Investigation of Dynamic Load Sharing Behavior for Herringbone Planetary Gears considering Multicoupling Manufacturing Errors

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Fei Ren ◽  
Jinchen Ji ◽  
Guofu Luo ◽  
Shaofu Zhao ◽  
Liya Zhao ◽  
...  
Keyword(s):  
Planetary Gear ◽  
Load Sharing ◽  
Gear Train ◽  
Actual Structure ◽  
Lumped Parameter ◽  
Manufacturing Errors ◽  
Main Components ◽  
Gyroscopic Effects ◽  
Profile Errors ◽  
Sharing Behavior

In this study, based on the lumped-parameter theory and the Lagrange approach, a novel and generalized bending-torsional-axial coupled dynamic model for analyzing the load sharing behavior in the herringbone planetary gear train (HPGT) is presented by taking into account the actual structure of herringbone gears, manufacturing errors, time-dependent meshing stiffness, bearing deflections, and gyroscopic effects. The model can be applied to the analysis of the vibration of the HPGT with any number of planets and different types of manufacturing errors in different floating forms. The HPGT equivalent meshing error is analyzed and derived for the tooth profile errors and manufacturing eccentric errors of all components in the HPGT system. By employing the variable-step Runge–Kutta approach to calculate the system dynamic response, in conjunction with the presented calculation approach of the HPGT load sharing coefficient, the relationships among manufacturing errors, component floating, and load sharing are numerically obtained. The effects of the combined errors and single error on the load sharing are, respectively, discussed. Meanwhile, the effects of the support stiffness of the main components in the HPGT system on load sharing behavior are analyzed. The results indicate that manufacturing errors, floating components, and system support stiffness largely influence the load sharing behavior of the HPGT system. The research has a vital guiding significance for the design of the HPGT system.

Study on Dynamic Load Sharing Behavior of Two-Stage Planetary Gear Train Based on a Nonlinear Vibration Model

2011 ◽  
Vol 86 ◽  
pp. 611-614 ◽  
Author(s):  
Tong Jie Li ◽  
Ru Peng Zhu ◽  
He Yun Bao
Keyword(s):  
Planetary Gear ◽  
Load Sharing ◽  
Gear Train ◽  
Two Stage ◽  
Transmission Errors ◽  
Meshing Stiffness ◽  
Vibration Model ◽  
Planetary Gear System ◽  
Dynamic Load Sharing ◽  
Sharing Behavior

The nonlinear torsional vibration model of a two-stage planetary gear system is established taking errors of transmission, time varying meshing stiffness and multiple gear backlashes into account. The solution of the equations is determined by using ODE45. The influences of transmission errors on the load sharing behavior are assessed and some useful theoretical guidelines for the design of planetary gear systems are provided at last.

scholarly journals Load Sharing Behavior of Double-Pinion Planetary Gear Sets Considering Manufacturing Errors

2019 ◽  
Vol 677 ◽  
pp. 052068 ◽  
Author(s):  
Weiqiang Liu ◽  
Junqing Li ◽  
Yanlong Kang ◽  
Yanfang Liu ◽  
Xiangyang Xu ◽  
...  
Keyword(s):  
Planetary Gear ◽  
Load Sharing ◽  
Manufacturing Errors ◽  
Planetary Gear Sets ◽  
Sharing Behavior

scholarly journals Analysis of Dynamic Behavior of Multiple-Stage Planetary Gear Train Used in Wind Driven Generator

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Jungang Wang ◽  
Yong Wang ◽  
Zhipu Huo
Keyword(s):  
Planetary Gear ◽  
Load Sharing ◽  
Gear Train ◽  
Planetary Gear Train ◽  
Change Rate ◽  
Revolution Speed ◽  
Lumped Parameter ◽  
Parallel Axis ◽  
Dynamic Load Sharing ◽  
Parameter Theory

A dynamic model of multiple-stage planetary gear train composed of a two-stage planetary gear train and a one-stage parallel axis gear is proposed to be used in wind driven generator to analyze the influence of revolution speed and mesh error on dynamic load sharing characteristic based on the lumped parameter theory. Dynamic equation of the model is solved using numerical method to analyze the uniform load distribution of the system. It is shown that the load sharing property of the system is significantly affected by mesh error and rotational speed; load sharing coefficient and change rate of internal and external meshing of the system are of obvious difference from each other. The study provides useful theoretical guideline for the design of the multiple-stage planetary gear train of wind driven generator.

Dynamic load sharing behavior of transverse-torsional coupled planetary gear train with multiple clearances

2015 ◽  
Vol 22 (7) ◽  
pp. 2521-2532 ◽  
Author(s):  
Dong-ping Sheng ◽  
Ru-peng Zhu ◽  
Guang-hu Jin ◽  
Feng-xia Lu ◽  
He-yun Bao
Keyword(s):  
Dynamic Load ◽  
Planetary Gear ◽  
Load Sharing ◽  
Gear Train ◽  
Planetary Gear Train ◽  
Dynamic Load Sharing ◽  
Sharing Behavior

scholarly journals The Effects of the Planet–Gear Manufacturing Eccentric Errors on the Dynamic Properties for Herringbone Planetary Gears

2020 ◽  
Vol 10 (3) ◽  
pp. 1060
Author(s):  
Fei Ren ◽  
Ansheng Li ◽  
Guiqin Shi ◽  
Xiaoling Wu ◽  
Ning Wang
Keyword(s):  
Dynamic Properties ◽  
Planetary Gear ◽  
Dynamic Contact ◽  
Contact Forces ◽  
Gear Train ◽  
Parameter Method ◽  
Dynamic Feature ◽  
Actual Structure ◽  
Manufacturing Errors ◽  
Planet Gear

In the presence of manufacturing errors, the dynamic properties of herringbone planetary gear train (HPGT) can be altered from the originally designed properties to have undesired behavior. In this paper, by considering the herringbone gear actual structure characteristics, manufacturing eccentric errors of members (i.e., carrier and gears) and tooth profile errors of gears, time-varying meshing stiffness, bearing deformation, and gyroscopic effect, a novel lateral–torsional–axial coupling dynamic model for the herringbone planetary gear system is formulated by using the lumped-parameter method, which is able to be employed in the dynamic feature analysis of the HPGT with an arbitrary number of planets and different types of manufacturing errors. By applying the variable-step Runge–Kutta algorithm, the dynamic response of a HPGT system is studied for cases with and without planet–gear eccentric error excitations. The dynamic contact forces of gears and bearings are analyzed for the two cases in time and frequency domains, respectively. Moreover, the effect of the planet–gear eccentricity on the vibration accelerations of the HPGT system is also discussed. The obtained results indicate that manufacturing error excitations such as the planet–gear eccentricity have a pronounced influence on the dynamic behavior of the HPGT system.

Research on Efficiency and Load Sharing Characteristics of High-Speed-Ratio Planetary Gear Transmissions

2015 ◽  
Author(s):  
Jianbin Liang ◽  
Datong Qin ◽  
Wei Wen ◽  
Jun Jiang
Keyword(s):  
High Speed ◽  
Planetary Gear ◽  
Load Sharing ◽  
Speed Ratio ◽  
Contact Ratio ◽  
Low Loss ◽  
Position Errors ◽  
Manufacturing Errors ◽  
Profile Errors ◽  
Tooth Profile Errors

Wolfrom planetary gear (WPG), James Ferguson planetary gear (JFPG) and plus-planetary gear (PPG), feature high speed ratios and a low number of gears, but their efficiency is low and their performance is sensitive to manufacturing errors. In this paper, low-loss gears are used to improve the efficiency of these high-speed-ratio planetary gear transmissions. The methods to achieve the low-loss gears are optimizing modification coefficients and addendum coefficients simultaneously in order to equalize approach-contact ratio and recess-contact ratio. Besides, the sensitivity of the load sharing performance to manufacturing errors is analyzed in the view of load sharing characteristics. A load sharing model, which includes position errors of planet bearings and tooth profile errors of planets, is built up to obtain the load sharing characteristics of WPG, JFPG and PPG. Load sharing performance of WPG, JFPG and PPG with manufacturing errors are analyzed. And effects of load sharing measures are compared.

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