Dynamics of a rotor-aerostatic journal bearings system with asymmetric air feeding

Dal, Abdurrahim; Karaçay, Tuncay

doi:10.1007/s40430-022-03601-z

Cited by 2 publications

(2 citation statements)

References 33 publications

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“…Small high-speed precision cylindrical roller objective uneven material, shape asymmetry, and other factors make its center main inertia axis and the axis of rotation there a certain deviation, resulting in the cylindrical roller work of dynamic unbalance [1,2]. The cylindrical roller with dynamic unbalance will generate periodic centrifugal force [3][4][5] when rotating at high speed, and the larger centrifugal force will change the force state of the cylindrical roller, intensifying the cylindrical roller's rotational slippage and spin sliding [6], accelerating the wear of the cylindrical roller surface, reducing the performance, working life and efficiency of rotating machinery [7].…”

Section: Introductionmentioning

confidence: 99%

Design and Research of Non-destructive Detection Drive Device for Precision Type Cylindrical Roller Dynamic Unbalance

Liang

Duan

Zhang

et al. 2023

Preprint

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In order to solve the problem of small high-speed precision cylindrical roller, which is difficult to drive and the surface is easily damaged when doing dynamic unbalance detection due to the small size and light mass of the roller, this paper proposes a new drive method, using air flotation non-destructive support instead of V-block or cylindrical surface of the roller and other lossy contact support and air flotation electric spindle combined with vacuum suction cup instead of belt friction drive; establish a mathematical model of cylindrical roller force to study the force of cylindrical roller in the air flotation sleeve during the drive, and through the force analysis, it is shown that under the condition that the structural parameters and material parameters of the drive remain unchanged, the start-up speed of the drive depends on the load-bearing capacity of the air film on the cylindrical roller; the mathematical model of the air film load-bearing capacity and the thickness of the air film is established to study the changing characteristics of the air film load-bearing capacity in the air flotation sleeve, and the correctness of the mathematical model is verified through numerical calculation combined with simulation analysis; the test platform of the drive device based on the non destructive detection of cylindrical roller dynamic unbalance is built to further verify the feasibility of high-speed non-destructive drive of cylindrical rollers and to create favorable conditions for the development of the non-destructive detection instrument for small mass cylindrical rollers dynamic unbalance.

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Section: Introductionmentioning

confidence: 99%

Design and Research of Non-destructive Detection Drive Device for Precision Type Cylindrical Roller Dynamic Unbalance

Liang

Duan

Zhang

et al. 2023

Preprint

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show abstract

“…Consequently, this engenders dynamic unbalance in the cylindrical roller's operation [1,2]. The presence of dynamic unbalance in a cylindrical roller during high-speed rotation begets periodic centrifugal forces [3][4][5]. The larger centrifugal forces induce an alteration in the force equilibrium of the cylindrical roller, thereby exacerbating rotational slippage and spin sliding phenomena [6].…”

Section: Introductionmentioning

confidence: 99%

Development and Investigation of Non-Destructive Detection Drive Mechanism for Precision Type Cylindrical Roller Dynamic Unbalance

Liang,

Duan,

Zhang

et al. 2023

Applied Sciences

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In the process of dynamic unbalance detection for precision cylindrical rollers, challenges such as difficulty in achieving effective driving and susceptibility to surface damage during driving significantly impact the accuracy of unbalance detection. This hinders the industry’s ability to achieve the non-destructive detection of cylindrical rollers. Therefore, this paper proposes a novel driving method to enable non-destructive driving of precision cylindrical rollers. The structural principles of the driving mechanism are presented, and a mechanical model for the cylindrical roller is established to analyze the force distribution. Subsequently, a mathematical model for the air film bearing the cylindrical roller is developed to study the variation characteristics of the air film’s load-bearing capacity. The optimal air film thickness is determined, and the rationality of the mathematical model is validated through simulation analysis. Finally, an experimental platform for non-destructive driving is constructed to further verify the effectiveness of the proposed method. This research provides a prerequisite for the non-destructive detection of dynamic unbalance in precision cylindrical rollers.

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Dynamics of a rotor-aerostatic journal bearings system with asymmetric air feeding

Cited by 2 publications

References 33 publications

Design and Research of Non-destructive Detection Drive Device for Precision Type Cylindrical Roller Dynamic Unbalance

Design and Research of Non-destructive Detection Drive Device for Precision Type Cylindrical Roller Dynamic Unbalance

Development and Investigation of Non-Destructive Detection Drive Mechanism for Precision Type Cylindrical Roller Dynamic Unbalance

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