Tribological aspects of a strain wave gearing system with specific reference to its space application

Ueura, Keiji; Kiyosawa, Yoshihide; Kurogi, J; Kanai, Shinya; Miyaba, H; Maniwa, Kazuaki; Suzuki, Mitsuaki; Obara, Shin’ya

doi:10.1243/13506501jet415

Cited by 27 publications

(22 citation statements)

References 3 publications

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“…In view of the above, studies concerning lubrication in harmonic drive gears concern: Research on properties of lubricants intended for strain wave gears. Special attention is deserved here to the studies concerning the lubrication of harmonic drive gears designed for operation in outer space [ 30 , 31 ]; The tear and wear of the transmissions and selected tribological aspects [ 32 , 33 ]. …”

Section: Introductionmentioning

confidence: 99%

Properties of Elasto-Hydrodynamic Oil Film in Meshing of Harmonic Drive Gears

et al. 2021

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Among the essential issues facing designers of strain wave gears, the provision for correct lubrication should be of paramount importance. The present paper presents the results of research on elasto-hydrodynamic oil film in meshing of a harmonic drive with an involute tooth profile. The research was carried out based on theoretical models developed by Dowson and Higginson. For the discussed structural problem, results of the study are presented graphically in the form of static characteristics of the oil film. Correct operation regimes were determined for two different oils. The paper also provides a review of information concerning the design and principle of operation of strain wave transmission.

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Section: Introductionmentioning

confidence: 99%

Properties of Elasto-Hydrodynamic Oil Film in Meshing of Harmonic Drive Gears

et al. 2021

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“…Huang et al 10 established the calculation model of friction torque and heat capacity for flexible bearings and obtained the temperature distribution of the inner and outer ring and the rolling elements. Ueura and Kiyosawa 11 made a comprehensive study on the failure mode and failure mechanism between the outer ring of flexible bearing and the inner wall of flexspline. They established a mixed lubrication model with asperity contact model.…”

Section: Introductionmentioning

confidence: 99%

Research on static and dynamics mechanical characteristics of flexible bearing in harmonic reducer

Zhu

Wang

et al. 2020

International Journal of Advanced Robotic Systems

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Flexible bearing is an important component of harmonic reducer which is widely used in automation equipment, especially in industrial robots. Studying its mechanical characteristics has great significance. In this article, the theoretical model of contact force between rolling elements and outer ring is established based on three bending moment equations, and the characteristics of CSF-40-80 flexible bearing are also studied by finite element method analysis. Analysis of equivalent stress at static state has shown that it already has large equivalent stress before load and that external load has a great influence on it. The dynamic and contact characteristics of it after actual assembly are also presented in this article. The displacements and velocities at different locations at different times of the movement are found to be different, which can provide a reference for the manufacture of flexible bearing.

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“…An accelerated life test of harmonic actuator was carried out in reference [7], and an accelerated life test of liquid lubrication in mechanical part of spacecraft was carried out in reference [8]. The lubrication performance of a strain wave transmission system in a space application was studied in [9,10]. The transmission errors of harmonic drive gears were studied in [11,12].…”

Section: Introductionmentioning

confidence: 99%

Research on Performance Test System of Space Harmonic Reducer in High Vacuum and Low Temperature Environment

Wang

Wan²,

Zhang

et al. 2020

Machines

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The harmonic reducer, with its advantages of high precision, low noise, light weight, and high speed ratio, has been widely used in aerospace solar wing deployment mechanisms, antenna pointing mechanisms, robot joints, and other precision transmission fields. Accurately predicting the performance of the harmonic reducer under various application conditions is of great significance to the high reliability and long life of the harmonic reducer. In this paper, a set of automatic harmonic reducer performance test systems is designed. By using the CANOpen bus interface to control the servo motor as the drive motor, through accurately controlling the motor speed and rotation angle, collecting the angle, torque, and current in real time, the life cycle test of space harmonic reducer was carried out in high vacuum and low temperature environment on the ground. Then, the collected data were automatically analyzed and calculated. The test data of the transmission accuracy, backlash, and transmission efficiency of the space harmonic reducer were obtained. It is proven by experiments that the performance data of the harmonic reducer in space work can be more accurately obtained by using the test system mentioned in this paper, which is convenient for further research on related lubricating materials.

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Tribological aspects of a strain wave gearing system with specific reference to its space application

Cited by 27 publications

References 3 publications

Properties of Elasto-Hydrodynamic Oil Film in Meshing of Harmonic Drive Gears

Properties of Elasto-Hydrodynamic Oil Film in Meshing of Harmonic Drive Gears

Research on static and dynamics mechanical characteristics of flexible bearing in harmonic reducer

Research on Performance Test System of Space Harmonic Reducer in High Vacuum and Low Temperature Environment

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