Title:
SEAL FOR HIGH PRESSURE GAS
Document Type and Number:
Japanese Patent JP2016041971
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To enhance pressure resistance and sealing performance in a seal for high pressure gas for sealing the high pressure gas.SOLUTION: A seal for high pressure gas for sealing so that the high pressure gas is prevented from leaking from around a shaft inserted into a shaft hole of a casing includes a first stage seal part on a high pressure side and a second stage seal part on a low pressure side. The first stage seal part on the high pressure side includes a middle rigidity resin ring slidably abuts a peripheral surface of the shaft, a rubber ring arranged on an outer peripheral side of the middle rigidity resin ring, a middle rigidity resin backup ring disposed on the low pressure side of the middle rigidity resin ring and the rubber ring, and a high rigidity resin backup ring disposed on the low pressure side of the middle rigidity resin backup ring. The second stage seal part on the low pressure side includes a low rigidity resin ring slidably abuts the peripheral surface of the shaft, and a rubber ring arranged on an outer peripheral side of the low rigidity resin ring.SELECTED DRAWING: Figure 1
Inventors:
YAMABE MASAHISA
Application Number:
JP2014166486A
Publication Date:
March 31, 2016
Filing Date:
August 19, 2014
Export Citation:
Assignee:
NOK CORP
International Classes:
F16J15/18; F16J15/16; F16K41/04
Attorney, Agent or Firm:
Yoichi Nomoto
Kiriyama Dai
Kiriyama Dai