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1990 Fiscal Year Final Research Report Summary

Research on Run-Out Characteristics of an Externally Pressurized Gas-Lubricated Journal Bearing

Research Project

Project/Area Number 01550115
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 機械要素
Research InstitutionKyoto University

Principal Investigator

YABE Hiroshi  Kyoto Univ. Faculty of Engnr. Professor, 工学部, 教授 (30025936)

Project Period (FY) 1989 – 1990
KeywordsHydrostatic gas bearing / Run-out / Machining error / Precision Design / Bearing Design / Out-of-roundness
Research Abstract

The run-out characteristics of a rotor supported by an externally pressurized gas-lubricated journal bearing are investigated in this research with a special attention to the relation with the machining errors of the rotor and the bearing. The obtained results are summarized as follows :
(1) The modified divergence formulation method to analyze the pressure distribution in the bearing clearance is established with taking into consideration the effect of divergent flow from discrete supply holes. The fundamental characteristics of the bearing with machining errors are studied by applying this method.
(2) A theoretical model to account for the run-out of a rotor supported by an externally pressurized gas-lubricated journal bearing is proposed in which the machining errors such as out-of-roundness of the journal and size deviation of supply holes are attributed to cause the rotor run-out. Static and dynamic run-out characteristics are discussed on the basis of the calculated results.
(3) A design criterion for maximum bearing stiffness, which is currently applied at the bearing design, is compatible with precision design criterion with respect to the rotor run-out.
(4) The rotor run-out is determined mainly by out-of-roundness of the rotor, but is scarcely affected by the size deviation of the supply holes.
(5) The run-out characteristics of the rotor are substantially related with the combination of the number of lobes of rotor cross-section, m, and the number of supply holes, k. The most critical situation for rotor run-out is such a case with m=k+1.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 矢部 寛: "静圧気体ジャ-ナル軸受の回転精度特性" 日本機械学会講演論文集. No.910ー17,C. 227-229 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 矢部 寛: "静圧気体ジャ-ナル軸受の回転精度特性(第1報:軸受特性解析法)" 日本機械学会論文集.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 矢部 寛: "静圧気体ジャ-ナル軸受の回転精度特性(第2報:回転精度特性)" 日本機械学会論文集.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroshi YABE: "Run-out Characteristics of an Externally Pressurized Gas-lubricated Journal Bearing" Prepr. of JSME.No. 910-17, Vol. C. 227-229 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroshi YABE: "A Study on Run-out Characteristics of an Externally Pressurized Gas-lubricated Journal Bearing (1-st Report : Calculation Method of Bearing Characteristics)" Trans. of JSME.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroshi YABE: "A Study on Run-out Characteristics of an Externally Pressurized Gas-lubricated Journal Bearing (2-nd Report : Rotor Run-out Characteristics)" Trans. of JSME.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-08-12  

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