Title:
【発明の名称】高蒸気圧流体用スパイラル溝シール装置および高蒸気圧流体のシール方法
Document Type and Number:
Japanese Patent JP2728283
Kind Code:
B2
Abstract:
A seal system is disclosed for sealing a housing and rotatable shaft against leakage of high vapor-pressure liquids. The method of sealing contemplates phase change of the liquefied hydrocarbon fluid across a first module. The gas so formed is contained by a second seal module which operates as a dry running gas seal. The seal system has plural, axially spaced spiral-groove seal modules mounted between the shaft and housing. Each seal module has a primary ring affixed to the housing and a mating ring affixed for rotation with the shaft and the modules define an intermediate cavity. The rings have opposed, radially extending faces, one of which has a plurality of downstream pumping spiral grooves extending from one circumference. The grooves of the grooved ring of the upstream module are of a depth not to exceed about 100 micro-inches. In a preferred form, the depth of the grooves of the upstream module do not exceed 50 micro-inches. The groove depth of the grooves of the downstream module is greater than the depth of the grooves of the upstream module and may be as much as 200 micro-inches.
Inventors:
AMUNDOSON DONARUDO
HAMAKAA JON
PETSUCHI GUREN
SEDEII JOSEFU
HAMAKAA JON
PETSUCHI GUREN
SEDEII JOSEFU
Application Number:
JP50563088A
Publication Date:
March 18, 1998
Filing Date:
June 10, 1988
Export Citation:
Assignee:
JON KUREIN INC
International Classes:
F04D29/12; F16J15/34; (IPC1-7): F16J15/34
Attorney, Agent or Firm:
Junzo Ogawa (1 person outside)