Abstract
The floating ring bearing (FRB) has been widely used in the field of high-speed rotating machinery such as turbochargers, aviation engines and so on, because of its simple structure, high efficiency and low power consumption. In order to obtain the best ratio between inter-oil clearance and shaft radius of the floating ring bearing necessitates the design reference of dimensional parameters for the design of floating ring bearings. This study, based on the transfer-matrix method, developed the dynamic model of the floating ring bearing-rotor system, and, using the Runge–Kutta analysis method for floating ring bearings, the influence of oil film relative clearance ratio of floating rings on rotor system stability was analyzed and studied. The optimum clearance ratio between inner oil film and the shaft of floating ring bearings is λ = 0.01. This research can provide some theoretical support for the design of parameters and fault diagnosis of rotor floating ring bearing systems.
Highlights
A floating ring bearing is a kind of double oil-film bearing, which has the advantages of simple structure and high efficiency
Using the Alford model, the impact of seal fluid excitation force and tip clearance excitation force on rotor dynamic characteristics is taken to be calculated about one type of ball bearing for automotive turbochargers, and the results show that seal fluid excitation force increases system damping and reduces the amplitude of the ball turbocharger rotor bearing system, system excitation increases the cross stiffness, and reduces the steady-state response amplitude [2,3]
For the turbocharger with the function of energy saving and emission reduction, the floating ring bearing is widely used, and its size parameters have a great impact on the performance of the rotor system, especially its mating size, and the relative clearance of the inner oil film is closely related to the working stability of the system
Summary
A floating ring bearing is a kind of double oil-film bearing, which has the advantages of simple structure and high efficiency. The multi-scale finite-element method is used to establish the dynamic model of floating ring bearings, in which paper, the calculation results are compared with the test results to verify its correctness This method improves the efficiency of calculation and analysis [6]. For the turbocharger with the function of energy saving and emission reduction, the floating ring bearing is widely used, and its size parameters have a great impact on the performance of the rotor system, especially its mating size, and the relative clearance of the inner oil film is closely related to the working stability of the system. At the end of the work, the floating ring rotor test-bed is established to test the vibration characteristics under different parameters to verify the correctness of the theoretical model and conclusion of this study. At the end of the work, the floating ring rotor test-bed is established to test the vibration characteristics under dif of 17 ferent parameters to verify the correctness of the theoretical model and conclusion of this study
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