Title:
多段軸封装置
Document Type and Number:
Japanese Patent JP4763920
Kind Code:
B2
Abstract:
A plurality of seal units (5 - 8) are provided between a seal housing (2) and a rotating shaft (3). An inside seal unit (5), an outside seal unit (8), and at least one pair of intermediate seal units (6, 7) are aligned in an axial direction. The inside seal unit (5) contacts fluid (B) to be sealed. The outside seal unit (8) contacts the atmosphere (A). The intermediate seal units (6, 7) are located between the inside seal unit (5) and the outside seal unit (8). A plurality of chambers (Ch1- Ch3) are defined by each of seal units (5 - 8). An intermediate liquid (C) is supplied to the chambers (Ch1 - Ch3). A pressure (P1) in an inside chamber (Ch1) is maintained lower than a pressure (PB) of the fluid (B) to be sealed in a machine. Pressures (P2, P3) in second and third chambers (Ch2, Ch3) are maintained equal to or higher than the pressure (PB) of the fluid (B) to be sealed (Fig. 1).
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| JPS5917069 | MECHANICAL SEAL |
| JPH0960571 | SHAFT SEAL DEVICE OF HYDRAULIC MACHINE |
| JPS5666563 | PRESSURE SEAL ASSEMBLY |
Inventors:
Hidekazu Takahashi
Takashi Yanagisawa
Takashi Yanagisawa
Application Number:
JP2001187616A
Publication Date:
August 31, 2011
Filing Date:
June 21, 2001
Export Citation:
Assignee:
Eagle Industry Co., Ltd.
International Classes:
F16J15/34; F16J15/40
Domestic Patent References:
| JP8277798A | ||||
| JP61067468U | ||||
| JP62160788U | ||||
| JP57107062U |
Attorney, Agent or Firm:
Yoichi Nomoto