This work presents theoretical and experimental results regarding the feasibility of introducing an active lubri-cation concept in tilting pad journal bearings (TPJBs) featuring the leading edge groove (LEG) lubrication system. The modification of the oil flow into each pad supply groove by means of servovalves renders the bearing active, due to the resulting alteration of the oil film pressure field. Experimental results obtained in a suitable test rig enables verification of the concept feasibility at the component level, considering a single tilting pad, load on pad configuration, supporting a rigid rotor. Secondly, theoretical results portray the application of this technology in a 5-pad, load between pad LEG TPJB, aimed at performing active control of vibrations in a flexible rotor setup. The proposed technology exhibits benefits in terms of the ability to excite system dynamics to perform in-situ identification experiments, as well as to reduce the rotor vibration amplitude.
|Title of host publication||Proceedings of 13th SIRM: The 13th International Conference on Dynamics of Rotating Machinery|
|Place of Publication||Kgs. Lyngby|
|Publisher||Technical University of Denmark|
|Publication status||Published - 2019|
|Event||13th International Conference on Dynamics of Rotating Machinery - Technical University of Denmark, Copenhagen, Denmark|
Duration: 13 Feb 2019 → 15 Feb 2019
Conference number: 13
|Conference||13th International Conference on Dynamics of Rotating Machinery|
|Location||Technical University of Denmark|
|Period||13/02/2019 → 15/02/2019|
Cerda Varela, A., Santos, I., Salazar, J. G., & Salazar, C. P. (2019). Experimental and Theoretical Study of an Actively Lubricated LEG Tilting Pad Bearing. In Proceedings of 13th SIRM: The 13th International Conference on Dynamics of Rotating Machinery (pp. 244-259). Kgs. Lyngby: Technical University of Denmark.