The analysis of power circulation and the simplified expression of the transmission efficiency of 2K-H closed epicyclic gear trains

Wang, Cheng; Cui, Huanyong

doi:10.1007/s11012-012-9652-0

Cited by 15 publications

(11 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Li and Wang [5] proposed a modular modeling method for planetary gear transmission systems, which decomposes the transmission gearbox system into three subsystems defined by Bond graph Causality, and assembles the subsystems to achieve the gearbox dynamics model. Wang and Cui [6] proposed a new algorithm for determining the power flow direction based on the 2 K-H closed planetary gear system. Through this algorithm, the transmission efficiency of the closed planetary gear system was obtained, and the existence of the system's power cycle was estimated.…”

Section: Introductionmentioning

confidence: 99%

Research on the calculation and evaluation method of transmission efficiency of noncircular planetary gear

Li,

Dong,

Zhao

et al. 2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

The torque fluctuation characteristics of noncircular planetary gear (NPG) systems are difficult to obtain, and there is no clear analysis method and evaluation method for transmission efficiency, which seriously affects their service performance. Given that, this article establishes a torque fluctuation model for NPG systems based on the principle of gear meshing and differential geometry theory and methods, taking into account factors such as actual working conditions and speed loads. And proposed, the comprehensive transmission rate, a new method for evaluating the efficiency of NPG systems. By analyzing the actual working conditions of NPG systems, the influence mechanism of alternating load and speed on torque fluctuation and transmission efficiency was explored. The research results indicate that the alternating load can cause an increase in system impact and vibration. The comprehensive transmission rate of NPG systems decreases with increasing rotational speed and increases with increasing load, and is more sensitive to changes in rotational speed. The trend of comprehensive transmission rate and transmission efficiency of NPG systems is basically consistent, indicating that the proposed method of using comprehensive transmission rate to evaluate transmission efficiency is a practical and feasible analysis method. The research results can provide a new method for dynamic measurement and evaluation of torque and transmission efficiency of non-circular gear transmission systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on the calculation and evaluation method of transmission efficiency of noncircular planetary gear

Li,

Dong,

Zhao

et al. 2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…In this study, a simple algorithm for determining the power flow direction and judging power backflow was proposed. Based on the transmission ratio of the basic components of differential gear trains and transformation gear trains, a simplified formula for calculating the transmission efficiency of 2K-H epicyclic gear trains was derived (Wang et al, 2013). In the 2K-H type planetary gear train, K represents the center gear, and H represents the planetary frame.…”

Section: Introductionmentioning

confidence: 99%

A calculation method of transmission efficiency for RV reducer

Wang¹

2021

JER is an international, peer-reviewed journal that publishes f

Self Cite

View full text Add to dashboard Cite

RV reducer is the core component of industrial robot. It is of great significance to raise the transmission efficiency of RV reducer for improving the transmission performance of industrial robot. RV reducer belongs to the 2K-V type planetary gear train and consists of an equal speed ratio mechanism. Therefore, according to the structural characteristics of RV reducer, the virtual power theory and split power theory are adopted, and a calculation method of transmission efficiency for RV reducer is proposed. Firstly, the structure of a common RV reducer is introduced. Related structural analysis, kinematic analysis, and loaded analysis are given. Secondly, RV reducer is represented by the method of graph theory. By the virtual power theory and split power theory, the power flow direction is determined, and the values of split powers are calculated. Finally, according to the graph representation for RV reducer and the calculation principle of meshing power loss of planetary gear, the power losses of meshing gear pairs are calculated, respectively. According to the input and output values described in graph representation of RV reducer, the formula of transmission efficiency for RV reducer is derived. The calculation of transmission efficiency for RV-40E reducer is considered as an example. The result is compared with previous work on the subject, and the relations between design parameters and transmission efficiency of RV reducer are discussed.

show abstract

“…Planetary gears are operated in several fields such as wind turbine and hybrid automotive where the performance of the whole system particularly depends on the split unit. [1][2][3] Many researchers proposed numerical models of planetary gears in order to ameliorate its dynamic behavior [4][5][6][7][8][9][10][11][12][13] and to have a better understanding of the vibratory signature, allowing the development of more efficient fault detection and diagnostic techniques. [14][15][16][17][18] The variable speed and load are the main nonstationary conditions in which planetary gears are usually running.…”

Section: Introductionmentioning

confidence: 99%

Dynamic behavior of the nonlinear planetary gear model in nonstationary conditions

Hammami

Mbarek

Fernández

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

The nonlinear effects in gearboxes are a key concern to describe accurately their dynamic behavior. This task is difficult for complex gear systems such as planetary gearboxes. The main aim of this work is to provide responses to overcome this difficulty especially in nonstationary operating regimes by investigating a back-to-back planetary gearbox in steady conditions and in the run-up regime. The nonlinear Hertzian contact of teeth pair is modeled in stationary and nonstationary run-up regime. Then it is incorporated in to a torsional model of the planetary gearbox through different mesh stiffness functions. In addition, motor torque and external load variation are taken into account. The nonlinear equations of motion of the back-to-back planetary gearbox are computed through the Newmark- β algorithm combined with the method of Newton–Raphson. An experimental validation of the proposed numerical model is done through a test bench for both stationary and run-up regimes. The vibration characteristics are extracted and correlated to speed and torque. Time–frequency analysis is implemented to characterize the transient regime during the run-up.

show abstract

The analysis of power circulation and the simplified expression of the transmission efficiency of 2K-H closed epicyclic gear trains

Cited by 15 publications

References 17 publications

Research on the calculation and evaluation method of transmission efficiency of noncircular planetary gear

Research on the calculation and evaluation method of transmission efficiency of noncircular planetary gear

A calculation method of transmission efficiency for RV reducer

Dynamic behavior of the nonlinear planetary gear model in nonstationary conditions

Contact Info

Product

Resources

About