Effect of bolt constraint of ring gear on the vibration response of the planetary gearbox

2021 ◽  
Vol 159 ◽  
pp. 104260
Author(s):  
Yingchao Luo ◽  
Lingli Cui ◽  
Jianfeng Ma
Keyword(s):  
Vibration Response ◽  
Ring Gear ◽  
Planetary Gearbox

scholarly journals Vibration Response of the Planetary Gears with a Float Sun Gear and Influences of the Dynamic Parameters

2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Yinghui Liu ◽  
Dong Zhen ◽  
Huibo Zhang ◽  
Hao Zhang ◽  
Zhanqun Shi ◽  
...  
Keyword(s):  
Phase Modulation ◽  
Vibration Response ◽  
Operating Conditions ◽  
Mechanical Transmission ◽  
Time Varying ◽  
The Sun ◽  
Dynamic Parameters ◽  
Planetary Gearbox ◽  
Pressure Angle ◽  
Overlap Ratio

Planetary gearboxes are widely used in mechanical transmission systems due to their large transmission ratio and high transmission efficiency. In a planetary gearbox, the sun gear is usually set to float to balance the sharing of loads among planet gears. However, this floating set will result in the variation of pressure angle, overlap ratio, and meshing phase in the meshing progress and when gear faults occur, the variation will be enlarged. In the previous studies, these parameters were reduced to constant. To study the influence of the dynamic parameters on the vibration response of planetary gearboxes under different operating conditions, a new lumped-parameter model containing the time-varying pressure angle (TVPA), time-varying overlap ratio (TVOR), and time-varying meshing phase (TVMP) is established. Based on this model, the vibration response mechanism of the sun gear is analyzed. Moreover, the comparison with the previous model is made and the rule of phase modulation caused by these dynamic parameters is revealed. By comparing the dynamic responses under different loads and rotation speeds, the phase modulation is studied in detail. Finally, the sun gear fault is introduced, and the phase modulation is analyzed in different fault degrees. This study can provide theoretical reference for the condition monitoring and fault diagnosis of planetary gearbox based on vibration analysis.

Design and Application of a Planetary Gearbox for Small Wind Turbines

2012 ◽  
Vol 271-272 ◽  
pp. 818-822 ◽  
Author(s):  
Sung Hoon Park ◽  
Hyun Dai Yang ◽  
Jee Ho Kim ◽  
Joong Ho Shin
Keyword(s):  
Wind Turbine ◽  
Planetary Gear ◽  
Concentric Circle ◽  
Gear Train ◽  
Ring Gear ◽  
Planetary Gear Train ◽  
Planetary Gearbox ◽  
Input And Output ◽  
High Acceleration ◽  
Small Wind Turbines

A planetary gear train consists of a sun gear, planet gears, and a ring gear and these gears are arranged as a concentric circle type. The gearbox proposed in this study arranges the planetary gear type as a double planetary gear train in which the output of the primary gear train is used as an input to the secondary planetary gear for accelerating its speed. In this design, a method that directly connects the input and output sections is introduced to obtain a high acceleration ratio and its applicability is verified for applying it to a small wind turbine through designing and fabricating the planetary gearbox.

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