Provided is a seal device capable of reliably preventing a sealed fluid from leaking to the outside of equipment.A seal device 1 is provided at a portion where relative rotation occurs between a first member 10 and a second member 2 that rotates relative to the first member 10. The seal device 1 includes first seal part 21 facing an external fluid W and second seal part 23 arranged in parallel to the first seal part 21 and facing a sealed fluid in an interior of equipment to prevent entry of the external fluid W and leakage of a sealed fluid. Intermediate seal part 22 is arranged in parallel to the first seal part 21 and the second seal part 23 between the first seal part 21 and the second seal part 23. A gas chamber 31 is formed between the first seal part 21 and the intermediate seal part 22, to which a gas having a higher pressure than the external fluid W is supplied. An intermediate chamber 32 is formed between the intermediate seal part 22 and the second seal part 23, to which a gas having a lower pressure than the gas supplied to the gas chamber 31 and having lower pressure than the sealed fluid is supplied.
SEAL DEVICE
DICHTUNGSVORRICHTUNG
DISPOSITIF D'ÉTANCHÉITÉ
2023-01-18
Patent
Elektronische Ressource
Englisch