Maintainability Engineering Theory In The 5hgs "series Grain Dryer

Grain drying machinery has important position in agricultural production in China. The thesis present the design concept that the index of reliability and maintainability effectiveness design should be considered in the course of designing dryer, being directed at the real condition that the mean time between failure of dryer was low, failure rate was high, mean time to repair was long, which the condition was a result of paying attention to performance design, ignoring the reliability and maintainability design. Effectiveness design can reflect more precisely the level of product completing a given task than any single index. At present, the design concept became extremely important under the condition that the quality of dryer grain was required higher and higher. In this thesis, applying maintainability engineering theory, adopting the timing experimental method, experiment was done in practice agricultural production with four kinds of model ?HGS-15? ?HGS-20? ?HGS-25? ?HGS-35?were target, and the condition of failure and repair of vary system of ?HGS?series grain dryer were recorded. Using the experimental data, directed by the maintainability theory, maintainability of ?HGS?series grain dryer was quantitative qualitative analyzed, the path of improving the effectiveness of ?HGS?series grain dryer was given, improving opinion and countermeasure were given too. The result of improved design concept was forecasted. Serviceability of improved design concept increased from 85.08% to 91.09%, accord with the demand dryer can operate normally in 89% of all time, forecast result was satisfied.This research presented firstly the design concept of effectiveness design from the point of view of maintainability, this research has certain real significant and applied value for improving the economical efficiency of dryer.