Analysis of mixed lubrication of RV reducer turning arm roller bearing

Zhang, Zhenhua; Wang, Jiaxu; Zhou, Guangwu; Pei, Xin

doi:10.1108/ilt-12-2016-0311

Cited by 21 publications

(9 citation statements)

References 23 publications

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“…The measurement results of the torque transducers in the robot reducer detectors cannot be taken as the input and output torques of the robot reducer [21][22][23][24]. There is a distance between the torque transducers in the precision robot reducer detector and the reducer to be tested.…”

Section: Analysis Of the Additional Torquementioning

confidence: 99%

Torque Measurement of High‐Precision Reducer for Industrial Robot

Zhang

2021

Journal of Sensors

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Torque testing is crucial to improve the quality of high-precision reducers—the core component of industrial robots. Herein, a torque-measurement system for a novel vertical measuring instrument is designed. The distance from the torque transducers to the robot reducer is minimized to ensure the shortest measurement chain. The symmetrical system structure improves the overall rigidity, and error compensation can be performed easily. The characteristics of the torque measurement errors due to shaft bending and torsional deformations were also analyzed. A torque calibrator comprising two high-precision torque output systems was used to calibrate torque transducers in the measurement system. Reasonable and practical compensation models based on a backpropagation neural network were developed to accurately obtain the input and output torques of the reducer. As the torque-measurement precision of the reducer detector reached 0.1% over the entire torque range, the instrument can be used for accuracy measurement of the input and output torques of the robot reducer.

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Section: Analysis Of the Additional Torquementioning

confidence: 99%

Torque Measurement of High‐Precision Reducer for Industrial Robot

Zhang

2021

Journal of Sensors

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“…At the same time, many experts and scholars have carried out a series of studies on the comprehensive performance of the RV reducer, mainly from the RV reducer transmission accuracy, torsional stiffness, and other aspects. [4][5][6][7] Wang et al 8 established an improved cycloidal gear meshing efficiency model by using the numerical analysis method of mixed elastohydrodynamic lubrication. Yang et al 9 proposed an analytical error modeling method for RV reducer's overconstrained structure, and clearly established the relationship between the original error and transmission accuracy.…”

Section: Introductionmentioning

confidence: 99%

Application of instantaneous phase detection technology based on laser displacement sensor in fault diagnosis of spur gear of rotation vector reducer

Jiang

Wang

et al. 2022

Opt. Eng.

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Aiming at the problem of a spur gear fault of the rotation vector (RV) reducer in industrial robots, an instantaneous phase detection technology based on eccentric modulation and laser displacement sensor is proposed. Taking the RV-20E reducer as the object, through the analysis of the RV reducer gear fault mechanism, an RV reducer fault diagnosis test bed is developed to simulate the actual operating conditions of the RV reducer of industrial robot. The instantaneous phase information of the RV reducer is collected, and the adaptive permutation entropy is used to process the instantaneous phase data, which can judge the gear fault type quickly and effectively. The test results show that the fault diagnosis test bench based on this detection technology can effectively and quantitatively judge the fault type of the spur gear of the RV reducer. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 International License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…For an RV reducer, the service life mainly depends on the rated life of crankshaft bearings [4,5]. Both the RV reducer sample manuals of Nabtesco and standard GB/T37718 take the rated life of the crankshaft bearing as the service life of the reducer.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the crankshaft bearings often suffer fatigue failure, which limits the service life of the RV reducer [4]. Therefore, crankshaft bearings use non-standard cylindrical roller bearings [4,5]. For nonstandard bearing, it takes a lot of time to design the bearing with the traditional trial and error method [6].…”

Section: Introductionmentioning

confidence: 99%

Optimization Design of RV Reducer Crankshaft Bearing

Huang

Chen

2020

Applied Sciences

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The crankshaft bearing is the key component of a rotate vector (RV) reducer. However, owing to the harsh working load and restricted available space, the bearing often suffers from fatigue failure. Therefore, this study proposes a novel optimization method for RV reducer crankshaft bearings. A nonlinear constraint optimization model for the design of the bearing considering the crowned roller profile is formulated and is solved by using a crow search algorithm. The goal of the optimization is to maximize the fatigue life of the bearing. The design variables corresponding to the bearing geometry and crowned roller profile are considered. The load working conditions of the bearing and structure of the RV reducer are analyzed. Various constraints, including geometry, lubrication, strength of the bearing, and structure of the RV reducer, are established. Through the optimization design, the optimum crowned roller profile suitable for the working load of the bearing is obtained, and the stress concentration between the roller and raceway is eliminated. Taking the crankshaft bearing of RV-20E and RV-110E type reducers as examples, the bearings were optimized by the proposed method. After optimization, the bearing life of the RV-20E type reducer is increased by 196%, and the bearing life of the RV-110E type reducer is increased by 168%.

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Analysis of mixed lubrication of RV reducer turning arm roller bearing

Cited by 21 publications

References 23 publications

Torque Measurement of High‐Precision Reducer for Industrial Robot

Torque Measurement of High‐Precision Reducer for Industrial Robot

Application of instantaneous phase detection technology based on laser displacement sensor in fault diagnosis of spur gear of rotation vector reducer

Optimization Design of RV Reducer Crankshaft Bearing

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