| 摘要 |
PURPOSE:To absorb pressure fluctuation to test bellows, by a method wherein damper bellows are provided in an accumulator for absorbing pressure fluctuation. CONSTITUTION:Test bellows 12 are provided within an adiabatic cover 11 of a heating furnace. A heater 13 is provided around the bellows 12 for performing high temperature fatigue examination of the test bellows 12. The test bellows 12 are extended and contracted by up and down motion of a flange 15 caused by a driving rod 16. A pressure supply 20 is connected for supplying pressure to the inside of the bellows 12. A pipe 21 which connects the pressure supply 20 and the inside of the bellows 20 has an accumulator 24 with damper bellows 25. The damper bellows 25 absorb variation of inside pressure due to the extension and contraction of the sample bellows 12, so that the bellows 12 can always be examined under the constant pressure. |
