The non-circular planetary gear train exhibits significant nonlinear and time-varying characteristics due to the dynamic changes of pitch curve, which makes its loaded contact analysis face a series challenges. In this paper, based on finite element method, real meshing process is simulated, whole tooth model established. By introducing stiffness surface mesh node, variation law trajectory, normal force, comprehensive elastic deformation, transmission error in are analyzed. considering...

In order to enhance the load-bearing capacity of involute beveloid gear pair, this study proposes research on improving contact stress through axial modification. Under condition segmented parabolic modification, mathematical equation for tooth flank is derived. A simulation meshing model pair constructed investigate effects different amounts and lengths modification performance, changes in root stress, transmission error before after The results indicate that as amount increases, maximum...

Abstract The torque fluctuation characteristics of noncircular planetary gear (NPG) systems are difficult to obtain, and there is no clear analysis method evaluation for transmission efficiency, which seriously affects their service performance. Given that, this article establishes a model NPG based on the principle meshing differential geometry theory methods, taking into account factors such as actual working conditions speed loads. And proposed, comprehensive rate, new evaluating...

In order to theoretically research the tooth surface maximum contact stress of a Cylindrical Gear with Variable Hyperbolic Circular-Arc-Tooth-Trace (VH-CATT), computing formula VH-CATT cylindrical gear is investigated according Hertz in this paper. Insufficient fatigue strength will lead pitting corrosion, plastic deformation and other damages. Therefore, must be carried out. The calculation particularly considering effect normal force, total carrying length, synthetical curvature radius,...

The transmission error of the gear system is main factor affecting its performance. expansion special applications elliptic and improvement accuracy requirements put forward higher for Although many works have been presented to study cylindrical system, a few were focused on gears reason inconsistency tooth profile pair, difficulty establishing model obtaining dynamic backlash. To overcome this problem, theoretical backlash pair proposed established based meshing line incremental method....

The special variable ratio transmission characteristics and complex tooth profile curve of elliptic gears make it difficult to analyse their characteristics, which restrict the application development elliptical gears. Given that, a characteristic analysis method based on testing is proposed in this paper. By building high-precision gear test rig, distribution laws dynamic lost motion, static back clearance, stiffness, friction torque vibration with speeds loads are analysed obtained....

As an important parameter to distinguish noncircular gear from cylindrical gear, eccentricity is very for the meshing characteristics and transmission error of gear. In order study elliptic a pair in reversing device new type drum pumping was taken as research object. Based on analysis pressure angle instantaneous contact ratio introduced into model error. The influences angle, ratio, were analyzed, accuracy verified by finite element method. results show that has great influence significant...

To address the vibration problem in traditional W-W-type non-circular planetary gear trains during operation, this study proposes two new combinations of trains. The focuses on analysing transmission error and improving service performance. By utilizing conjugate theory coordinate transformation theory, an accurate mathematical model for gears is derived. models combination forms train are established using incremental meshing line method. analysis also examines influence eccentricity error....

Aiming at the challenge of measuring errors in non-circular gears, it is proposed to establish mathematical model gear center based on digital twin technology, and research detection method pitch error gears. The simulates operation center, replacing traditional hardware with a 3D simulation software. By calculating trajectory probe unique characteristics Portal program framework developed. This allows for precise calculation comparison actual measurements achieve accurate analysis errors....

Transmission efficiency is an important index to evaluate the transmission performance and energy consumption of gear systems. To analyse elliptic gears, load torque fluctuation model established influence system on input output. The data output under different working conditions are obtained by conducting test. Finally, pair through measurement test, its variation law analysed. results show that changes constantly presents increasing trend with increase a decreasing speed.