Factors influencing functional reliability of a turbo refrigerator for environment test chambers

Analyses the influencing factors with the method of fault tree analysis (FTA). Discusses the relations between those factors. Points out that the exterior direct factors are lower bearing supply air pressure, over speed, higher humidity of supply air, abrupt fluctuation of supply air pressure, cleanliness of supply air and exterior impact. Analyses the indirect factors influencing the direct factors. Puts forward the measures for improving the reliability of the turbo refrigerators. Discusses the control range of the parameters influencing reliability.