This paper addresses the unclear bearing force of an RV reducer shaft by establishing a transmission model and analyzing situation each component. Three models for crank support bearing, swivel arm main are developed. The variations under different working conditions impact structural parameters on forces analyzed. Structural optimization is performed using Kriging-NSGA-II to minimize forces. results show similar load patterns bearings, with magnitude being ranked in following order:...

This paper uses the Kelvin‐Voigt viscoelastic model to establish continuous dynamic equations for tail hammer tension belt conveyors. The continuity are solved using generalized coordinate method. We analyze various factors influencing longitudinal vibration of conveyor by simulation and propose a control strategy limit vibration. proposed approach were verified several experimental researches cases. provides improved accuracy design

This paper explores the cage whirl state under different operating conditions based on cylindrical roller bearing dynamics model. The stability and characteristics of are evaluated by considering rotation force roller. results demonstrate that is divided into three types according to orbit: disordered whirl, local periodic regular circular whirl. With speed radius unpredictable, changes frequently. speed, change periodically or stay constant. In case a should be considered evaluate addition,...

With the continuous advancement in bearing speed, assembly clearance (pocket, radial, and guide clearances) has a particularly significant impact on dynamic characteristics of bearing. In order to improve its performance, it is necessary generate an optimized design for based analysis. this paper, model cylindrical roller been put forth variable step fourth-order Runge–Kutta method, while simulation results have verified by high-speed cage motion testing machine. Considering pocket,...

The longitudinal dynamic governing equation of the viscoelastic belt with one end subjected to concentrated mass was established based on Kelvin-Voigt partial-differential constitutive law. generalized coordinate method adopted solve displacement and tension. And then it reduced be a nonhomogeneous where analytical solutions constant acceleration were obtained. effects damping coefficient, loading radio, response investigated using model. results show that vibration frequency moving...

When considering the problem of a vertical magnetic levitation bearing system, rotor eccentric fall is more likely to cause failure protective bearing. In this paper, drop collision model and dynamics are constructed. It compares analyzes evolution force values as well non-eccentric drop. Further, paper discusses law influence three factors, quality, rotational speed, axial protection clearance, on characteristics protected in cases. has also experimentally verified characteristic speed. The...

This paper investigates a method to dynamically model compound faults on the inner and outer rings of an angular contact ball bearing as well their effects its dynamic behavior. Gupta’s modeling is used consider changes in deformation direction load when passes through damaged area develop bearing. The step‐changing fourth‐order Runge–Kutta solve fault model. time‐domain signal vibration responses case single exhibited certain periodicity, frequency envelope spectrum was clear. By...

Aiming at the dynamic question of belt conveyor, based on Kelvin-Voigt viscoelastic constitutive law longitudinal governing equation conveyor was established.The generalized coordinate method adopted to solve displacement and tension weight end.According model natural frequency were investigated by research digital simulation.The results show that will become small when throughput increases.Moreover, increasing value starting time lead a deceasing in then reduce design safety coefficient...

In response to the limitations and one-sidedness of simulation results a rigid three-row cylindrical roller bearing for an offshore wind turbine main shaft under constant-load conditions, this paper proposes analysis method variable loads. A contact mechanics model flexible body are established, rigid-flexible coupled treatment is applied bearing’s inner outer ring cages. Based on load theoretical speeds, simulated acceleration responses pure compared, validated. Finally, dynamic transient...

Faults in cylindrical roller bearings are one of the main contributors to major faults rotating machinery. The development bearing fault diagnosis technologies is key measuring performance, status, and risk failure rolling-element has attracted extensive attention from industry academia. When arise, they often not a single but compound fault, such as simultaneous inner outer races. In this paper, method for evaluating size on races proposed. dynamic modeling developed by Gupta employed...

Based on an analysis of failure causes, the axial force is main reason why spindle bearings vibrate abnormally and cause frequent failures fans in mines. In this paper, probability density function bearing vibration was established through bootstrap maximum entropy method, Lagrangian multiplier empirical coefficient were introduced, models upper‐ lower‐bound functions true value established. The interval estimation values reliability obtained basis entropy. results showed that decreased with...

PTFE/aramid woven fiber liners were modified by acrylamide, phosphate ester coupling agent, respectively.The effects of the liner on friction coefficient, wear loss and temperature self-lubricating spherical plain bearings investigated using self-made compound swinging type testing machine.With Instron 5944 electronic universal material machine, bonding property was analyzed .The results show that have a greater degree improvement bearing all decreased.In three kinds liners, properties...

Bearing ring residual stress test data obtained by µ-360 s analyzer have the characteristics of unknown probability distribution and limited samples. For this problem, study introduces uncertainty proposes a grey relation method to estimate true value bearing stress. Based on poor information theory (incomplete insufficient for characteristic presented in subject investigated) fusing membership function method, maximum rolling mean bootstrap sequence is obtained. On basis, fusion implemented...