MECHANICAL SEAL DEVICE
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United States of America Patent
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N/A
Issued Date -
Aug 13, 2015
app pub date -
Sep 4, 2013
filing date -
Nov 2, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A mechanical seal device for sealing a fluid inside of machine at a space formed between a stuffing box and a rotary shaft, comprises a seal cover attached to the stuffing box, a stationary seal ring attached to the seal cover and provided with a first seal surface, a rotary seal ring attached to the rotary shaft and provided with a second seal surface capable of sliding on the first seal surface, and a collar rotating together with the rotary shaft. The seal surface of either one of the stationary seal ring and the rotary seal ring is formed so that a face width of a radial direction is narrower than the other seal surface. A clearance is formed between a back surface opposing to the second seal surface of the rotary seal ring and the collar. The rotary seal ring is elastically held in an axial direction of the rotary shaft to rotate together with the collar.
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