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

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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

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Grease Lubrication For Low Speed Bearing Applications

Mr. Akshay Rajeev
Dr. Balasubramaniam Vengudusamy

SLIDE 2

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.

Grease used in wind turbines

Grease Lubrication For Low Speed Bearing Applications 15.05.2017 / Slide 2

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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.

Viscosity, film thickness and grease

Grease Lubrication For Low Speed Bearing Applications 15.05.2017 / Slide 3

What is Viscosity? Film thickness Thickener Base Oil Grease

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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.

How to select the right grease for a lube point?

Grease Lubrication For Low Speed Bearing Applications 15.05.2017 / Slide 4

Application parameters Bearing type Speed Load Temperature …… Base Oil viscosity should be: 400 cSt! Conventional lubricant selection procedure Thickener Base Oil Grease

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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.

EHL Tribometer

Grease Lubrication For Low Speed Bearing Applications 15.05.2017 / Slide 5

Film Thickness Glass disc-on-steel ball

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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.

Film Thickness

Grease Lubrication For Low Speed Bearing Applications 15.05.2017 / Slide 6

At low speeds, low viscosity grease forms a thicker lubricating film than the high viscosity grease
This is contributed by thickener

10 20 30 40 50 60 70 80 Film Thickness (nm)

Low Speed

(0.05 m/s)

130 cSt 300 cSt (KL) (KL) 10 20 30 40 50 60 70 80 Film Thickness (nm)

Moderate Speed

(0.1 m/s)

130 cSt 300 cSt (KL) (KL) 50 100 150 200 250 300 350 400 Film Thickness (nm)

Very Low Speed

(0.0015 m/s)

130 cSt 300 cSt (KL) (KL)

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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.

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

Grease Lubrication For Low Speed Bearing Applications 15.05.2017 / Slide 7

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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