Volume 5, Issue 9 (October 2008)

    Effects of Contamination on Aerospace Hydraulic Component and System Performance

    (Received 30 November 2007; accepted 7 August 2008)

    Published Online: 2008

    CODEN: JAIOAD

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    Abstract

    Most papers concerning hydraulic systems contamination cover primarily the adverse effects of particulate contamination on hydraulic component and system performance. While that is a valid concern, the effects of other contaminants can also be serious. This paper concentrates on the adverse effects of water, free air, and chemical contaminants on military aerospace hydraulic component and systems performance. The hydraulic fluids used in the military aerospace systems are both the mineral oil-based MIL-PRF-5606 [1] and the synthetic hydrocarbon-based fire resistant hydraulic fluids MIL-PRF-83282 [2], and MIL-PRF-87257 [3]. Examples will be provided where each of the contaminants were responsible for some adverse effect and the recommended solution for the problems will be provided. Some of the problems encountered were stuck valves, spongy controls, “burnt” hydraulic fluid, and erratic actuator performance. The methodology used to identify the source of the problem will be presented. Based on the problems found, limits for these contaminants were recommended and, when followed, solved the problems for the aircraft involved. The major significance of this paper is to enlighten the aerospace hydraulic system community to the potential problems caused by contamination other than particulate contamination and to suggest solutions for these problems.


    Author Information:

    Snyder, Carl Ed
    Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Ohio,

    Gschwender, Lois J.
    Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Ohio,

    Sharma, Shashi K.
    Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Ohio,


    Stock #: JAI101605

    ISSN: 1546-962X

    DOI: 10.1520/JAI101605

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    Author
    Title Effects of Contamination on Aerospace Hydraulic Component and System Performance
    Symposium Symposium on Contamination of Hydraulic Systems and its Effect on Performance, 2007-12-03
    Committee D02