Title:
MECHANICAL SEAL
Document Type and Number:
WIPO Patent Application WO/2011/036917
Kind Code:
A1
Abstract:
Provided is a mechanical seal for which a flushing pie and a cooler are not necessary.
The mechanical seal is an outside mechanical seal which seals a fluid to be sealed that tends to leak from the inner periphery toward the outer periphery of a slide surface. The mechanical seal is characterized in that a rotatable seal element and a stationary seal element are provided on the outside of a stuffing box, the stationary seal element which contains a spring is attached to a seal cover secured to a housing, the rotatable seal element is attached to a collar directly attached to a rotary shaft, a rotary system comprised of the rotatable seal element and the collar is disposed so as to rotate in the external side atmosphere, the balance ratio A2/A1 is set so as to be not more than 1 if a projected area in the axial direction of the slide surface of the stationary seal element is represented by A1, and a projected area in the axial direction, which receives a seal fluid pressure that acts as a moving force to move the stationary seal element in the axial direction is represented by A2, and a ring-shaped cooling jacket is provided between the inner periphery of the housing and the outer periphery of the rotary shaft.
Inventors:
TAKAHASHI HIDEKAZU (JP)
Application Number:
PCT/JP2010/058419
Publication Date:
March 31, 2011
Filing Date:
May 19, 2010
Export Citation:
Assignee:
EAGLE IND CO LTD (JP)
TAKAHASHI HIDEKAZU (JP)
TAKAHASHI HIDEKAZU (JP)
International Classes:
F16J15/34; F04B39/00; F04B53/00; F04D29/12; F04D29/58
Domestic Patent References:
| WO2006022378A1 | 2006-03-02 |
Foreign References:
| JP2002098237A | 2002-04-05 | |||
| JP2002098237A | 2002-04-05 | |||
| JP2006022378A | 2006-01-26 |
Other References:
See also references of EP 2481960A4
Attorney, Agent or Firm:
SHIGENOBU Kazuo et al. (JP)
Shigenobu Kazuo (JP)
Shigenobu Kazuo (JP)
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