GB2230307A - A mechanical seal - Google Patents

A mechanical seal

Info

Publication number
GB2230307A
GB2230307A GB9005052A GB9005052A GB2230307A GB 2230307 A GB2230307 A GB 2230307A GB 9005052 A GB9005052 A GB 9005052A GB 9005052 A GB9005052 A GB 9005052A GB 2230307 A GB2230307 A GB 2230307A
Authority
GB
United Kingdom
Prior art keywords
seal
housing
bellows
product fluid
pressure
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
GB9005052A
Other versions
GB9005052D0 (en
GB2230307B (en
Inventor
John Anthony Knight
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.)
Flexibox Ltd
Original Assignee
Flexibox 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
Priority claimed from PCT/GB1988/000726 external-priority patent/WO1989002555A1/en
Application filed by Flexibox Ltd filed Critical Flexibox Ltd
Priority to GB9005052A priority Critical patent/GB2230307B/en
Publication of GB9005052D0 publication Critical patent/GB9005052D0/en
Publication of GB2230307A publication Critical patent/GB2230307A/en
Application granted granted Critical
Publication of GB2230307B publication Critical patent/GB2230307B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3436—Pressing means
    • F16J15/344—Pressing means the pressing force being applied by means of an elastic ring supporting the slip-ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/36—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member connected by a diaphragm or bellow to the other member

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Sealing (AREA)

Abstract

A mechanical seal (9) to seal a rotating shaft (7) that extends from a housing (3) which contains a product fluid to be retained within the housing (3), comprises a first seal (11) element coupled to the shaft (7), and a second seal element (13) coupled to the housing (3). The mechanical seal (9) is characterised by the provision of an elastomeric bellows (19) connected at one end to the second seal element (13) and at the other end to the housing (3), the bellows (19) having a radially disposed surface responsive to the pressure of the product fluid, whereby the closing force acting on the second seal element (13) is a combination of the spring action of the bellows (19) and the pressure of the product fluid acting on the surface. As a result of this arrangement the bellows (19) is responsive to changes in pressure in the product fluid to vary the area of the surface thereby to vary the closing force.
GB9005052A 1987-09-11 1990-03-06 A mechanical seal Expired - Fee Related GB2230307B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9005052A GB2230307B (en) 1987-09-11 1990-03-06 A mechanical seal

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPI430387 1987-09-11
PCT/GB1988/000726 WO1989002555A1 (en) 1987-09-11 1988-09-02 A mechanical seal
GB9005052A GB2230307B (en) 1987-09-11 1990-03-06 A mechanical seal

Publications (3)

Publication Number Publication Date
GB9005052D0 GB9005052D0 (en) 1990-07-04
GB2230307A true GB2230307A (en) 1990-10-17
GB2230307B GB2230307B (en) 1991-03-13

Family

ID=25643353

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9005052A Expired - Fee Related GB2230307B (en) 1987-09-11 1990-03-06 A mechanical seal

Country Status (1)

Country Link
GB (1) GB2230307B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2258019A (en) * 1991-07-24 1993-01-27 Crane John Uk Ltd Mechanical face seals

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1335642A (en) * 1972-02-26 1973-10-31 Davies J K Shaft seals
GB1441179A (en) * 1973-12-31 1976-06-30 Magnetic Seal Corp Rotary seals
FR2503822A1 (en) * 1981-04-10 1982-10-15 Cefilac Rotary shaft seal using undulating rubber sleeve in axial compression - pref. using silicone or nitrile rubber sleeve and graphite-filled pad

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1335642A (en) * 1972-02-26 1973-10-31 Davies J K Shaft seals
GB1441179A (en) * 1973-12-31 1976-06-30 Magnetic Seal Corp Rotary seals
FR2503822A1 (en) * 1981-04-10 1982-10-15 Cefilac Rotary shaft seal using undulating rubber sleeve in axial compression - pref. using silicone or nitrile rubber sleeve and graphite-filled pad

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2258019A (en) * 1991-07-24 1993-01-27 Crane John Uk Ltd Mechanical face seals
AU646747B2 (en) * 1991-07-24 1994-03-03 John Crane Uk Limited Mechanical face seals

Also Published As

Publication number Publication date
GB9005052D0 (en) 1990-07-04
GB2230307B (en) 1991-03-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000902