Local contact characteristics of threaded surfaces in a planetary roller screw mechanism

Ma, Shangjun; Wu, Linping; Liu, Geng; Fu, Xiaojun

doi:10.1080/15397734.2019.1615944

Cited by 23 publications

(8 citation statements)

References 19 publications

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“…The possible reasons are as follows: 1) the deformation measured by experiment also contains other deformations such as the structural deformation of the test rig, the clearances of the sensors and the clearances of the components of PRSM [11][12]; 2) the accuracy coefficient is an empirical value, which requires a lot of experiments to obtain. In addition, the selection of accuracy coefficient in this paper refers to the BSM, and the axial stiffness of PRSM may be more sensitive to machining errors.…”

Section: Resultsmentioning

confidence: 99%

Experimental Research on Static Stiffness of the Planetary Roller Screw Mechanism

Zhang

et al. 2020

MATEC Web Conf.

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This paper investigates the static stiffness characteristics of the planetary roller screw mechanism (PRSM). Firstly, an analytical model of elastic deformation in the PRSM considering contact deformation, combined deformation of screw shaft and thread deformations is established. Then, an accuracy coefficient is introduced to take into account the effect of machining error and assembly error on elastic deformation. Secondly, the stiffness tests of the PRSM are performed under different loads and nut positions. Lastly, the correctness of the analytical results is verified via the comparison with experimental results. The results show that the analytical results are in good agreement with the experimental results, and the stiffness variations under different loads and nut positions are obtained.

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Section: Resultsmentioning

confidence: 99%

Experimental Research on Static Stiffness of the Planetary Roller Screw Mechanism

Zhang

et al. 2020

MATEC Web Conf.

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“…The elastic-plastic contact characteristic was obtained automatically by the iterative finite element method. Ma and his colleagues [37][38] developed a static contact model considering friction to investigate contact properties. Meanwhile, the contact position among threads and the main curvature direction of the contact ellipse were also calculated according to meshing equation of the thread surface.…”

Section: Analytical Meshing Modelmentioning

confidence: 99%

A review of planetary roller screw mechanism for development and new trends

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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With the rapid development of all electric mechanical equipment in the fields of industrial application, aerospace engineering, and national defense, planetary roller screw mechanism has attracted much attention as a new type actuator of electro-mechanical actuator system. This report systematically reviews previous large number of researches as well as new advancements on five types of planetary roller screw mechanisms from both available literatures and studies presented. Firstly, the general structure, merits, limitations, and the application of five types of planetary roller screw mechanisms are summarized. Then, the development state of the planetary roller screw mechanisms is elaborated in the three aspects: parameter design, contact properties, and performance analysis. Common problems and tendencies of theoretical analysis and calculation models are analyzed. Finally, the research directions and methods in the future on planetary roller screw mechanism are discussed. Key technologies and research challenges are presented in terms of multi-pair dynamic contact and multi-body vibration of system, and the development prospects for various planetary roller screw mechanisms in all electric mechanical equipment are summed up.

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“…Since then, PRSM has been the subject of intensive interest. The majority of interests were focused on meshing mechanism and parameter design (Ma et al, 2020;Sandu et al, 2018), kinematics and dynamics analysis (Jones and Velinsky, 2012;Jones et al, 2016), lubrication and tribology behaviors in operation (Auré gan et al, 2016;Xie et al, 2019), etc. These researches have provided rich theoretical foundation for PRSM parameter optimization and performance improvement, and greatly promoted the engineering application progress of PRSM.…”

Section: Introductionmentioning

confidence: 99%

A roller taper modification method for load distribution optimization of planetary roller screw mechanism

Wei

Zhou³

et al. 2022

JAMDSM

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Planetary roller screw mechanism (PRSM) is a novel high-performance linear transmission device. The non-uniformity of load distribution over PRSM threads is a vital problem severely affecting its load-carrying capacity and service performance. This work aims to develop a PRSM load distribution improvement approach with good manufacturability and general applicability. A roller taper modification method for load distribution optimization is proposed based on the deformation compatibility and force equilibrium, then the roller grinding experiment is carried out. Finally, the effects of external load and thread number on load sharing optimization are analyzed to examine the applicability. The results show that the maximum reduction in load sharing coefficient reaches 31.4% after roller taper modification under the case studied. The taper modification of roller threads could be rapidly implemented by only adjusting the roller grinding angle. The roller grinding experiment results agree well with the theoretical values, and the maximum error is no more than 2 μm. As the external load and thread number change, the improvement approach still works well. The proposed method has been verified by comparisons with finite element simulations and available references. This work can provide theoretical guidance for the optimal design of PRSM and has good engineering application prospects.

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Local contact characteristics of threaded surfaces in a planetary roller screw mechanism

Cited by 23 publications

References 19 publications

Experimental Research on Static Stiffness of the Planetary Roller Screw Mechanism

Experimental Research on Static Stiffness of the Planetary Roller Screw Mechanism

A review of planetary roller screw mechanism for development and new trends

A roller taper modification method for load distribution optimization of planetary roller screw mechanism

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