Effects of operating parameters on gas transportation of radial lip seals

Shinya Nakaoka, Yuki Sato, Joichi Sugimura

Research output: Contribution to journalArticle

Abstract

This paper describes the effects of shaft speed, sump temperature, sump level, and sump pressure on gas transportation of standard plain lip seals. The volume of helium pumped from the air side to the sump side of lip seals, and that leaked from the sump side to the air side, were measured using gas chromatography. Lip seals pump helium and, at the same time, leak it in the opposite direction. The helium pump rate and the leak rate increase with the shaft speed, suggesting that the gas moves through the gap between the lip and the shaft. Helium also moves across lip seals by permeation through the seal material. Therefore, lip seals have two paths for gas movement. Path-1 is the seal material in which helium moves by permeation. Path-2 is a gap between the seal lip and the shaft in which helium is transported by the dynamic effect. The helium pump rate and the leak rate through path-2 do not change with sump level but do increase with sump temperature. The helium pump rate decreases remarkably with sump pressure and is lower than the helium leak rate at a sump pressure higher than 30 kPa.

Original languageEnglish
Pages (from-to)549-558
Number of pages10
JournalJapanese Journal of Tribology
Volume53
Issue number5
Publication statusPublished - Dec 1 2008

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Helium
Seals
Gases
Pumps
Permeation
Air
Gas chromatography
Temperature

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Effects of operating parameters on gas transportation of radial lip seals. / Nakaoka, Shinya; Sato, Yuki; Sugimura, Joichi.

In: Japanese Journal of Tribology, Vol. 53, No. 5, 01.12.2008, p. 549-558.

Research output: Contribution to journalArticle

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