SEAL DEVICE AND PACKING USED IN THE SEAL DEVICE

• Main Authors: NAKAHARA NOBUO, MURAKAMI HIDEYUKI
• Format: Patent
• Language: English; Japanese
• Published: 21.04.2016
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PISTONS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; SEALINGS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a seal device capable of reducing leakage of fluid from a high pressure side to a low pressure side of a packing while keeping a seal function by compression fixing, and a packing used in the seal device, as regards a secondary seal of a mechanical seal.SOLUTION: In a seal device, an annular packing 5 having an elastic seal material 51 is compressed and fixed between a first fixing member 1 and a second fixing member 4, and fluid between a high pressure side and a low pressure side is tightly sealed by the compressed packing 5. The packing 5 has elastic seal portions 5a, 5b of an annularly continuously extending elastic seal material 51 functioning as a seal part while at least a part of it is abutted against each of the first fixing member 1 and the second fixing member 4, and at least one of the high pressure side and the low pressure side of the elastic seal material 51 is provided with coating portions 6a, 6b coated with coating through which the fluid more hardly permeates than the elastic seal member 51 is applied.SELECTED DRAWING: Figure 1 【課題】メカニカルシールの２次シールに関し、圧縮固定によるシール機能を維持しつつパッキンの高圧側から低圧側への流体の漏れを低減させることができるシール装置及びその装置に用いるパッキンを提供する。【解決手段】第１固定部材１と第２固定部材４との間に弾性シール材５１を有する環状のパッキン５を圧縮固定し、この圧縮されたパッキン５で高圧側と低圧側との間の流体を密封するシール装置であって、パッキン５は、第１固定部材１及び第２固定部材４の各々に少なくとも一部が当接してシール部として機能する環状に連続して延びる弾性シール材５１の弾性シール部５ａ，５ｂを有し、弾性シール部５１の高圧側及び低圧側の少なくとも一方には弾性シール材５１よりも流体が透過し難いコーティングが施されるコーティング部６ａ，６ｂが設けられている。【選択図】図１