scholarly journals An experimental investigation for crack detection in rotor-bearing system

2019 ◽  
Vol 8 (4) ◽  
Keyword(s):  
Experimental Investigation ◽  
Crack Detection ◽  
Rotor Bearing ◽  
Bearing System

Numerical and experimental investigation on thermohydrodynamic performance of turbocharger rotor-bearing system

2017 ◽  
Vol 121 ◽  
pp. 27-38 ◽  
Author(s):  
Yajing Li ◽  
Feng Liang ◽  
Yu Zhou ◽  
Shuiting Ding ◽  
Farong Du ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Rotor Bearing ◽  
Bearing System

scholarly journals Analytical and Experimental Investigation of the Stability of the Rotor-Bearing System of a New Small Turbocharger

1987 ◽  
Author(s):  
H. R. Born
Keyword(s):  
Experimental Investigation ◽  
Dynamic Stability ◽  
Squeeze Film ◽  
Test Results ◽  
Flow Capacity ◽  
Squeeze Film Dampers ◽  
Rotor Bearing ◽  
The Stability ◽  
Turbine Design ◽  
Bearing System

This paper presents an overview of the development of a reliable bearing system for a new line of small turbochargers where the bearing system has to be compatible with a new compressor and turbine design. The first part demonstrates how the increased weight of the turbine, due to a 40 % increase in flow capacity, influences the dynamic stability of the rotor-bearing system. The second part shows how stability can be improved by optimizing important floating ring parameters and by applying different bearing designs, such as profiled bore bearings supported on squeeze film dampers. Test results and stability analyses are included as well as the criteria which led to the decision to choose a squeeze film backed symmetrical 3-lobe bearing for this new turbocharger design.

Experimental Investigation of Pedestal Looseness in a Rotor-Bearing System

2009 ◽  
Vol 413-414 ◽  
pp. 599-605 ◽  
Author(s):  
Wen Xiu Lu ◽  
Fu Lei Chu
Keyword(s):  
Experimental Investigation ◽  
Nonlinear Vibration ◽  
Nonlinear Response ◽  
Harmonic Component ◽  
Vibration Characteristics ◽  
Experimental Setup ◽  
Rotor Bearing ◽  
Harmonic Components ◽  
Bearing System

An experimental setup of rotor-bearing system is installed and vibration characteristics of the system with pedestal looseness are investigated. The pretightening bolt between the bearing house and pedestal is adjusted to simulate the pedestal looseness fault. The vibration waveforms, spectra and orbits are used to analyze the nonlinear response of the system with pedestal looseness. Different parameters, including speed, looseness gap, imbalance mass and disk position are changed to observe the nonlinear vibration characteristics. The experiments show that the system motion generally contains the 1/2X fractional harmonic component and multiple harmonic components such as 2X, 3X, etc. Under some special conditions, the pedestal looseness occurs intermittently, that is, occurs in some periods and doesn’t in other periods.

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