Bearing Applications Mr. Akshay Rajeev Dr. Balasubramaniam - PowerPoint PPT Presentation

Grease Lubrication For Low Speed Bearing Applications Mr. Akshay Rajeev Dr. Balasubramaniam Vengudusamy

15.05.2017 / Slide 2 Grease Lubrication For Low Speed Bearing Applications Grease used in wind turbines This document shall not be reproduced to a third party without the written consent of Klüber Lubrication München SE & Co. KG., unless otherwise contractually agreed.

15.05.2017 / Slide 3 Grease Lubrication For Low Speed Bearing Applications Viscosity, film thickness and grease Film thickness What is Viscosity? Base Oil Grease Thickener This document shall not be reproduced to a third party without the written consent of Klüber Lubrication München SE & Co. KG., unless otherwise contractually agreed.

15.05.2017 / Slide 4 Grease Lubrication For Low Speed Bearing Applications How to select the right grease for a lube point? Conventional lubricant selection procedure Application parameters Bearing type Base Oil viscosity Speed should be: Load Temperature 400 cSt! …… Base Oil Grease Thickener This document shall not be reproduced to a third party without the written consent of Klüber Lubrication München SE & Co. KG., unless otherwise contractually agreed.

15.05.2017 / Slide 5 Grease Lubrication For Low Speed Bearing Applications EHL Tribometer Film Thickness Glass disc-on-steel ball This document shall not be reproduced to a third party without the written consent of Klüber Lubrication München SE & Co. KG., unless otherwise contractually agreed.

15.05.2017 / Slide 6 Grease Lubrication For Low Speed Bearing Applications Film Thickness 400 80 80 Very Low Speed Low Speed Moderate Speed 350 70 70 (0.0015 m/s) (0.05 m/s) (0.1 m/s) 300 60 60 Film Thickness (nm) Film Thickness (nm) Film Thickness (nm) 250 50 50 200 40 40 150 30 30 100 20 20 50 10 10 0 0 0 130 cSt 300 cSt 130 cSt 300 cSt 130 cSt 300 cSt (KL) (KL) (KL) (KL) (KL) (KL) • At low speeds, low viscosity grease forms a thicker lubricating film than the high viscosity grease • This is contributed by thickener This document shall not be reproduced to a third party without the written consent of Klüber Lubrication München SE & Co. KG., unless otherwise contractually agreed.

15.05.2017 / Slide 7 Grease Lubrication For Low Speed Bearing Applications Summary Conventional theory suggests that - • Lubricant can be chosen only based on base oil viscosity • Not for grease lubrication • Higher the base oil viscosity, better the film thickness • Not for grease lubrication at low speeds This document shall not be reproduced to a third party without the written consent of Klüber Lubrication München SE & Co. KG., unless otherwise contractually agreed.

Your personal specialist Mr. Akshay Rajeev Sales Development Manager Akshay.Rajeev@klueber.com +49 (0)89 7876 - 829 Dr. Balasubramaniam Vengudusamy Senior Research Tribologist Balasubramaniam.Vengudusamy@klueber.com +49 (0)89 7876 - 606