Analysis of a Compact Squeeze Film Damper with Magneto Rheological Fluid

Rahul Kumar Singh; Mayank Tiwari; Anpeksh Ambreesh Saksena; Aman Srivastava

doi:10.14429/dsj.70.12788

Rahul Kumar Singh Indian Institute of Technology Patna - 801 106
Mayank Tiwari Indian Institute of Technology Patna - 801 106
Anpeksh Ambreesh Saksena Indian Institute of Technology Patna - 801 106
Aman Srivastava Indian Institute of Technology Patna - 801 106

DOI: https://doi.org/10.14429/dsj.70.12788

Keywords: Rotor, Magneto rheological fluid, Vibration control, Ball bearing, Squeeze film damper

Abstract

Rotor systems play vital role in many modern day machinery such as turbines, pumps, aeroengines, gyroscopes, to name a few. Due to unavoidable unbalance in the rotor systems, there are lateral and torsional vibrations. Ignoring these effects may cause the system serious damages, which sometimes lead to catastrophic failures. Vibration level in rotor systems is acceptable within a range. Focus in this work is to minimize the vibration level to the acceptable range. One of the ways vibration level can be minimised is by means of providing damping. To accomplish this task in this work a new concept squeeze film damper is made by electro discharge machining which is compact in configuration, is filled with magneto-rheological (MR) fluid and tested out on one support of a Jeffcott rotor. This compact squeeze film damper (SFD) produces damping in a compact volume of the device compared to a conventional SFD. MR fluid is a smart fluid, for which apparent viscosity changes with the application of external magnetic field. This compact damper with MR fluid provides the variable damping force, controlled by an external magnetic field. In this work, proportional controller has been used for providing the control feedback. This MR damper is seen to reduce vibrations in steady state and transient input to the Jeffcott rotor. Parametric study for important design parameters has been done with the help of the simulation model. These controlled dampers can be used for reducing vibrations under different operating conditions and also crossing critical speed.

Author Biographies

Rahul Kumar Singh, Indian Institute of Technology Patna - 801 106

Mr Rahul K. Singh has obtained his MTech (Mechanical Engineering) from Indian Institute of Technology Patna, in 2017.

Mayank Tiwari, Indian Institute of Technology Patna - 801 106

Dr Mayank Tiwari obtained his PhD from Indian Institute of Technology (IIT) Delhi and further did Post Doctorate from Ohio State University. Post that, the author worked with General Electric in divisions like Aviation, GRC and a few more for a period of 14 years. Currently working as an Associate Professor in the Department of Mechanical Engineering at IIT Patna. He has many Patents and publications in the field of gas turbines and rotor dynamics. His area of interests are rotor dynamics, gas turbine engines, friction wear, lubrication and many more.

Anpeksh Ambreesh Saksena, Indian Institute of Technology Patna - 801 106

Mr Anpeksh Saksena has obtained his BTech (Mechanical Engineering) from Indian Institute of Technology Patna. Currently he is pursuing his MS from Ohio State University.

Aman Srivastava, Indian Institute of Technology Patna - 801 106

Mr Aman Srivastava has obtained his BTech (Mechanical Engineering) from Indian Institute of Technology (IIT) Patna. Currently, pursuing his PhD at IIT Patna and is working in the field of non-linear dynamics. The author is also working on a project with General Electric in the Rotating Machinery Lab of IIT Patna.

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