| 摘要 |
PROBLEM TO BE SOLVED: To properly manage a life of an accumulator to elongate the life of the accumulator.SOLUTION: In a gas supply system 2, a control portion 10 includes an acquiring portion 10a, a classifying portion 10b, and a determining portion 10c to determine lives of accumulators 61-63 on the basis of an acquisition number of stress amplitude of the accumulators 61-63. The acquiring portion 10a acquires the stress amplitude of the accumulators 61-63 from differential pressure of a first pressure in closing the first valve member 81 at a gas storage side and a second pressure in closing a second valve member 82 at a gas lead-out side. The classifying portion 10b classifies the stress amplitude into a plurality of groups. The determining portion 10c counts the acquisition number nof the stress amplitude of each group, dividing the acquisition number nof each stress amplitude by a destruction repeat number N, and determines a fatigue degree Σn/Nfrom the total of n/Nof each group determined above. When a value of the fatigue degree Σn/Nreaches a prescribed threshold value or more, the determining portion 10c determines the end of the life of the accumulator.SELECTED DRAWING: Figure 1 |
