Detail publikačního výsledku

On the Relation between Friction Increase and Grease Thickener Entraining on a Border of Mixed EHL Lubrication

ZAPLETAL, T.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

Originální název

On the Relation between Friction Increase and Grease Thickener Entraining on a Border of Mixed EHL Lubrication

Anglický název

On the Relation between Friction Increase and Grease Thickener Entraining on a Border of Mixed EHL Lubrication

Druh

Článek WoS

Originální abstrakt

This paper deals with an experimental study of film thickness and friction of commercial-grade grease and its base oil in a highly loaded contact. In-situ measurements were conducted for two surface textures on a ball-on-disc optical tribometer at the border of mixed lubrication. At high speeds, the film thickness and the friction of grease correspond with the base oil, while, the thickener enters the contact area and locally affects the film thickness and friction at low speeds. It was found out that the thickener starts to enter the contact area approximately at the same speed when the base oil friction increases on Stribeck curve but without direct solid to solid contact. It indicates that both effects can have the same origin. Change of lubricant flow in contact inlet area was discussed as a possible explanation.

Anglický abstrakt

This paper deals with an experimental study of film thickness and friction of commercial-grade grease and its base oil in a highly loaded contact. In-situ measurements were conducted for two surface textures on a ball-on-disc optical tribometer at the border of mixed lubrication. At high speeds, the film thickness and the friction of grease correspond with the base oil, while, the thickener enters the contact area and locally affects the film thickness and friction at low speeds. It was found out that the thickener starts to enter the contact area approximately at the same speed when the base oil friction increases on Stribeck curve but without direct solid to solid contact. It indicates that both effects can have the same origin. Change of lubricant flow in contact inlet area was discussed as a possible explanation.

Klíčová slova

film thickness; friction; grease; base oil; EHL

Klíčová slova v angličtině

film thickness; friction; grease; base oil; EHL

Autoři

ZAPLETAL, T.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

Rok RIV

2021

Vydáno

29.01.2020

Nakladatel

MDPI

Místo

BASEL

ISSN

2075-4442

Periodikum

Lubricants

Svazek

8

Číslo

2

Stát

Švýcarská konfederace

Strany od

1

Strany do

11

Strany počet

11

URL

https://www.mdpi.com/2075-4442/8/2/12/pdf

Plný text v Digitální knihovně

http://hdl.handle.net/11012/196754

BibTex

@article{BUT170224,
  author="Tomáš {Zapletal} and Petr {Šperka} and Ivan {Křupka} and Martin {Hartl}",
  title="On the Relation between Friction Increase and Grease Thickener Entraining on a Border of Mixed EHL Lubrication",
  journal="Lubricants",
  year="2020",
  volume="8",
  number="2",
  pages="1--11",
  doi="10.3390/lubricants8020012",
  issn="2075-4442",
  url="https://www.mdpi.com/2075-4442/8/2/12/pdf"
}

Dokumenty

lubricants-08-00012-v2