JPS5551166A - Mechanical seal - Google Patents

Mechanical seal

Info

Publication number
JPS5551166A
JPS5551166A JP12361978A JP12361978A JPS5551166A JP S5551166 A JPS5551166 A JP S5551166A JP 12361978 A JP12361978 A JP 12361978A JP 12361978 A JP12361978 A JP 12361978A JP S5551166 A JPS5551166 A JP S5551166A
Authority
JP
Japan
Prior art keywords
following ring
fluid
external fluid
seal
force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP12361978A
Other languages
Japanese (ja)
Other versions
JPS583149B2 (en
Inventor
Ko Inoue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12361978A priority Critical patent/JPS583149B2/en
Publication of JPS5551166A publication Critical patent/JPS5551166A/en
Publication of JPS583149B2 publication Critical patent/JPS583149B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Mechanical Sealing (AREA)

Abstract

PURPOSE: To hermetically seal an internal fluid even if the pressure of the internal fluid is lower than that of an external fluid, by inserting a secondary seal into space formed between a circumferential surface at the secondary seal side of a following ring and a guide portion material of the following ring in a shape that can move in the axial direction.
CONSTITUTION: When the pressure P1 of an internal fluid 10 becomes lower than the pressure P2 of an external fluid 11, the external fluid 11 flows into an external fluid working chamber 12 through a void between an inner circumferential surface of a following ring 4 and an outer circumferential surface of a retainer 6 and a through hole 14. A secondary seal 9 is pushed against a stage difference portion 6a of the retainer 6 while push force to a seal-up surface 5 of the following ring 4 is loaded to a stage difference portion 4a of the following ring 4. Since the relationship of force among force Fs of a spring 7 acting on the back side of the following ring 4 at that time, push force Ff" by the external fluid 11 and the fluid film reaction Fh" of the seal-up surface 5 of the following ring 4 is shown in an formula Ff"+Fs>Fh", the infiltration of the external fluid 11 can be prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP12361978A 1978-10-09 1978-10-09 mechanical seal Expired JPS583149B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12361978A JPS583149B2 (en) 1978-10-09 1978-10-09 mechanical seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12361978A JPS583149B2 (en) 1978-10-09 1978-10-09 mechanical seal

Publications (2)

Publication Number Publication Date
JPS5551166A true JPS5551166A (en) 1980-04-14
JPS583149B2 JPS583149B2 (en) 1983-01-20

Family

ID=14865065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12361978A Expired JPS583149B2 (en) 1978-10-09 1978-10-09 mechanical seal

Country Status (1)

Country Link
JP (1) JPS583149B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6224061B1 (en) * 1997-04-17 2001-05-01 Aes Engineering Limited Mechanical seals
CN101975276A (en) * 2010-10-21 2011-02-16 李兴斌 Dynamic sealing device and turnover type mixing machine adopting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6224061B1 (en) * 1997-04-17 2001-05-01 Aes Engineering Limited Mechanical seals
CN101975276A (en) * 2010-10-21 2011-02-16 李兴斌 Dynamic sealing device and turnover type mixing machine adopting device

Also Published As

Publication number Publication date
JPS583149B2 (en) 1983-01-20

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