Experimental Research on Transmission Characteristics  of Elliptic Gear Transmission Systems

Dong, Changbin; Pei, Wangpeng; Liu, Yongping; Wei, Yongqiao; Li, Dawei; Guo, Rui; Ren, Zhongtao

doi:10.5545/sv-jme.2022.332

Cited by 4 publications

(2 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These two torques constitute the windage torque of the gear, thus resulting in windage power loss [2], which is a load-independent power loss. A large number of experiments show that the windage loss becomes significant with the increase of gear speed [3]. When the linear velocity of the gear is greater than 50 m/s, the windage power loss caused by hydrodynamic behaviour must be paid sufficient attention [4] to [6].…”

Section: Introductionmentioning

confidence: 99%

An Analysis Model for Predicting Windage Power Loss of Aviation Spiral Bevel Gears Under Optimal Injection Jet Layout

Wang

2023

Tribology Transactions

View full text Add to dashboard Cite

With the increasing speed of aviation spiral bevel gears, the load-independent windage power losses caused by hydrodynamic have increasingly more influence on gear transmission efficiency. Firstly, a test rig for the windage power loss of spiral bevel gear under oil-jet lubrication is established, and on this basis, a method for measuring windage torque is proposed. Next, the interactive effects of different injection lubrication parameters on the windage power loss were studied by orthogonal experiment, and the formula for calculating the windage loss was obtained by fitting the experimental data. Then, the fluid distribution, velocity field and pressure field around the gear were analysed by using a computational fluid dynamics (CFD) numerical model, and the mechanical and energy characteristics of the gear windage power loss were obtained. Finally, the dimensionless processing of the windage moment was carried out, and the variation of the dimensionless windage moment coefficient with the rotational Reynolds number is obtained. The comparison between the dimensionless windage moment coefficient of experimental data and simulation results shows that the CFD values are in good agreement with the measured data. This study provides experimental and methodological guidance for the calculation of windage power loss and windage reduction design of aviation gear pair under oil injection lubrication.

show abstract

Section: Introductionmentioning

confidence: 99%

An Analysis Model for Predicting Windage Power Loss of Aviation Spiral Bevel Gears Under Optimal Injection Jet Layout

Wang

2023

Tribology Transactions

View full text Add to dashboard Cite

show abstract

“…Nevertheless, elliptical gear drives are very speed-sensitive, and the gear ratio error and stability can be improved by decreasing speed or increasing load. This problem was pointed out by Dong et al through experimental research on gear ratio characteristics of elliptical gears [13].…”

Section: Introductionmentioning

confidence: 98%

Replacing the involute profile with an improved cycloid profile to improve the bearing capacity for the elliptical gear drives

Thai,

Thom

2024

Vietnam J. Sci. Technol.

View full text Add to dashboard Cite

The involute curve is the most widely used in the design of tooth profiles for non-circular gears (NCGs) because of its mathematical simplicity and convenience for design and manufacture. Still, the condition to avoid undercutting often results in a large number of teeth and a small tooth size that reduces the load capacity of the gear drives. On the other hand, in elliptical gears (EGs), a particular case of NCGs, the unequal radii of the centrodes lead to unequal geometric shapes of the teeth arranged on the gear. To overcome the above phenomena and improve the load capacity of the gear drives in this study, the authors applied the improved cycloid profile as the tooth profile of the centered elliptical gear. The paper analyzes and evaluates to verify the disadvantages of tooth geometry of EG drives with the involute profile. On that basis, an improved cycloid curve is applied to improve the irregularity and increase the teeth size distributed on the gear. Two prototype gear drives with the same centrodes with ellipse involute and improved cycloid profiles were manufactured and experimental. The results showed that the EG drives with the improved cycloid profile allowed the design with fewer teeth than the involute profile to make the tooth size larger. Also, the experimental results showed that the practical versus theoretical gear ratio error value of the EG drives with improved cycloid profile and involute profile is 3.37% and 6.67%, respectively. It verified that the EG drives with the improved cycloid profile meshing process more smoothly than those with the involute profile. The research results are significant for applying and developing the improved cycloid profile in designing and manufacturing EG drives requiring high torque and precision.

show abstract

Design and tooth geometric trait analysis of helical noncircular gears based on a novel mathematical model

Li,

Gong,

Liu

et al. 2024

J Mech Sci Technol

View full text Add to dashboard Cite

Experimental Research on Transmission Characteristics of Elliptic Gear Transmission Systems

Cited by 4 publications

References 20 publications

An Analysis Model for Predicting Windage Power Loss of Aviation Spiral Bevel Gears Under Optimal Injection Jet Layout

An Analysis Model for Predicting Windage Power Loss of Aviation Spiral Bevel Gears Under Optimal Injection Jet Layout

Replacing the involute profile with an improved cycloid profile to improve the bearing capacity for the elliptical gear drives

Design and tooth geometric trait analysis of helical noncircular gears based on a novel mathematical model

Contact Info

Product

Resources

About