MERADCOM/OSU Hydraulic System Reliability Program. Section V. Hydraulic System Diagnostics. Section VI. Pump Contaminant Tolerance Verification.

摘要

It is generally agreed that contaminant wear is a major factor in the life and reliability of a hydraulic system. However, there is considerable evidence which suggests that proper component selection and maintenance can produce a significant reduction in the life cycle costs associated with such fluid systems. One of the primary costs related to the operation of a hydraulic system is premature failure, downtime, and unscheduled maintenance. One method of reducing these factors is through effective system diagnostics and prognosis. This section presents the results, interpretation, and conclusions relative to the effort associated with hydraulic system diagnostics. Specifically, the activity was directed toward the investigation and adaptation of Ferrographic fluid analysis for use with hydraulic systems. Laboratory tests were conducted to gain an appraisal of the capabilities and limitations of the technique and to determine the characteristic patterns of the water debris. The data and interpretation of these tests are presented. In addition, hydraulic system analysis was conducted to assess the ability of the Ferrographic method to pinpoint excessive wear situations. This section presents a detailed account of the project activities in the area of pump contaminant tolerance verification. A brief review of the progress made during the previous year is also given. Results of a number of extended life tests (from 22 to 1430 hours) are presented and comparisons are made to the calculated or predicted values. It is concluded that the contaminant wear prediction techniques are of sufficient accuracy to be routinely applied with confidence.