SHAFT SEAL DEVICE

• Main Authors: FUKUMOTO TAKAHITO, OKUMACHI EIJI
• Format: Patent
• Language: English
• Published: 12.05.2014
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LAUNDERING; LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILEARTICLES; LIGHTING; MECHANICAL ENGINEERING; PISTONS; SEALINGS; TEXTILES; THERMAL INSULATION IN GENERAL; TREATMENT OF TEXTILES OR THE LIKE; WEAPONS

PROBLEM TO BE SOLVED: To provide a more simple configuration of shaft seal device than that of the prior art by enabling an annular space 4 formed between a shaft 1 having a gas supply passage 5 where seal gas flows and a case 2 arranged at a diametral outward side of the shaft 1 to be sealingly closed by seal gas.SOLUTION: A shaft seal device comprises: a rotary seal ring 11 fixed to a case 2; a sleeve 15 having a feeding hole 16 formed to pass it to guide seal gas flowed through a gas supply passage 5 toward the outer peripheral surface side; a stationary seal ring 21 having a seal surface 22 oppositely facing against a seal surface 12 of the rotary seal ring 11; and a resilient member 30 for pushing against the stationary seal ring 21. A seal space 27 into which seal gas is supplied from the feeding hole 16 is formed between the sleeve 15 and the stationary seal ring 21. A gas passage 24 for flowing the seal gas from the seal space 27 into a space between the seal surfaces 12 and 22 is formed in the stationary seal ring 21.