TESTING APPARATUS FOR PRESSURE-RESISTANT STRENGTH OF PRESSURE VESSEL.

摘要

PROBLEM TO BE SOLVED: To provide a testing apparatus by which the durability and the life of a pressure vessel can be evaluated with high accuracy so that the fatigue strength characteristic or the like of the pressure vessel can be found with good efficiency and in a short time. ;SOLUTION: Respective objects 11, to be tested, at a pressure vessel are connected respectively to tip sides of respective branch conduits 24A, 25A, and a pressure oil from a hydraulic pump 22 is supplied repeatedly to the respective objects 11, to be tested, in a low-pressure vibration pattern. In addition, a pressure oil from a pressure intensification booster 26 is supplied repeatedly to the respective objects 11, to be tested, in a high-pressure vibration pattern via a servo valve 27. Then, the leak of the pressure oil supplied to the respective objects 11 to be tested is detected by respective level sensors 36. Thereby, an acceleration test in a short-life region by the servo valve 27 on the high-pressure side and a pressure-resistant test in a long-life region by a servo valve 31 on the low-pressure side are performed in parallel. In addition, the vibration pattern by the servo valve 31 on the low-pressure side is set at a pressure change which is by about 10 times faster than the vibration pattern by that of the vibration pattern by the servo valve 27 on the high-pressure side.;COPYRIGHT: (C)1998,JPO