Optimization of Hydrostatic Thrust Bearing Using Enhanced ...
Experimental Verification of Thrust Bearing Models in ...
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Experimental Verification of Thrust Bearing Models in Automotive Turbochargers Ioannis Chatzisavvas 1 , Panagiotis Koutsovasilis 2 , Bernhard Schweizer 1 1. Institute of Applied Dynamics, Technical University of Darmstadt 2. BorgWarner Turbo Systems Engineering GmbH Experimental Device Motivation Experimental Validation Radial and Thrust Bearings Experimental Set-Up: • Experimental validation for the influence of thrust bearings both on the frequency and on the amplitude of the subsynchronous vibrations is provided. • Detailed comparison between measurement and simulation. Short-Time Fourier Transform Subsynchronous Vibrations Full-floating Ring Bearing Thrust Bearing with 3 Pads • The turbocharger is placed in the Test Cell for measurements of: (a) acceleration on housing, (b) shaft motion, (c) axial displacement. Good agreement between simulations and experimental results. The thrust bearing affects the subsynchronous vibrations, both their amplitudes as well as their frequencies. The radial bearings are modeled using a novel semi-analytical Galerkin 1 approach and the thrust bearing is modeled using a Finite Difference approach 2 for the solution of the Reynolds equation. • Specially designed compressor housing for allowing two sided thrust loads. [1] I.. Chatzisavvas, G. Nowald, P. Koutsovasilis, B. Schweizer.: “Experimental And Numerical Investigations Of Turbocharger Rotors On Full-floating Ring Bearings With Circumferential”, ASME Turbo Expo, 2017. [2] I.. Chatzisavvas, A. Boyaci, P. Koutsovasilis, B. Schweizer.: “Influence Of Hydrodynamic Thrust Bearings On The Nonlinear Oscillations Of High-speed Rotors”, Journal of Sound and Vibration 380, 224-241, 2016. • Specially designed compressor wheel for controlling the axial motion. Rotational Speed Sensor Oil Intake Core Assembly Compressor Air-Supply Turbine Wheel Thrust Bearing Full-Floating Ring Bearing Modified Compressor Wheel Compressor Chamber Turbine Housing Thrust Load Oil- Supply Oil- Supply Displacement Sensor Shaft Nut Compressor Wheel Amplitude [mm] Axial Displacement [m] Axial Displacement [m] Axial Displacement [m] Frequency [Hz] Simulation Measurement Experimental Set-Up Control Unit Test Cell
Transcript of Experimental Verification of Thrust Bearing Models in ...
Experimental Verification of Thrust Bearing Models in Automotive TurbochargersIoannis Chatzisavvas1, Panagiotis Koutsovasilis2, Bernhard Schweizer1
1. Institute of Applied Dynamics, Technical University of Darmstadt2. BorgWarner Turbo Systems Engineering GmbH
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Experimental Set-Up:
• Experimental validation for the influence of thrust bearings both on the frequency and on the
amplitude of the subsynchronous vibrations is provided.
• Detailed comparison between measurement and simulation.
Short-Time Fourier Transform Subsynchronous Vibrations
Full-floating Ring Bearing Thrust Bearing with 3 Pads
• The turbocharger is
placed in the Test Cell for
measurements of: (a)
acceleration on housing,
(b) shaft motion, (c) axial
displacement.
Good agreement between simulations and experimental results.
The thrust bearing affects the subsynchronous vibrations, both their amplitudes as well as
their frequencies.
The radial bearings are modeled using a novel semi-analytical Galerkin1
approach and the thrust bearing
is modeled using a Finite Difference approach2
for the solution of the Reynolds equation.
• Specially designed
compressor housing for
allowing two sided thrust
loads.
[1] I.. Chatzisavvas, G. Nowald, P. Koutsovasilis, B. Schweizer.: “Experimental And Numerical Investigations Of Turbocharger Rotors On Full-floating Ring Bearings With Circumferential”,
ASME Turbo Expo, 2017.
[2] I.. Chatzisavvas, A. Boyaci, P. Koutsovasilis, B. Schweizer.: “Influence Of Hydrodynamic Thrust Bearings On The Nonlinear Oscillations Of High-speed Rotors”, Journal of Sound and
Vibration 380, 224-241, 2016.
• Specially designed
compressor wheel for
controlling the axial
motion.
Rotational
Speed Sensor
Oil
Intake
Core
Assembly
Compressor
Air-Supply
Turbine Wheel
Thrust BearingFull-Floating
Ring Bearing
Modified
Compressor
Wheel
Compressor
Chamber
Turbine
Housing
Thrust Load
Oil-
Supply
Oil-
Supply
Displacement
Sensor
Shaft Nut
Compressor
Wheel
Am
plitu
de
[m
m]
Axial Displacement [𝝁m]Axial Displacement [𝝁m]Axial Displacement [𝝁m]
Fre
qu
en
cy [
Hz]
SimulationMeasurement
Experimental Set-Up
Control Unit
Test Cell
