WO1989000246A1 - Joint d'etancheite mecanique - Google Patents

Joint d'etancheite mecanique Download PDF

Info

Publication number
WO1989000246A1
WO1989000246A1 PCT/AU1988/000219 AU8800219W WO8900246A1 WO 1989000246 A1 WO1989000246 A1 WO 1989000246A1 AU 8800219 W AU8800219 W AU 8800219W WO 8900246 A1 WO8900246 A1 WO 8900246A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
seal ring
ring holder
face
mechanical
Prior art date
Application number
PCT/AU1988/000219
Other languages
English (en)
Inventor
Ian Craig Walker
Original Assignee
Warman International Limited
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 Warman International Limited filed Critical Warman International Limited
Publication of WO1989000246A1 publication Critical patent/WO1989000246A1/fr

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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps

Definitions

  • the present invention relates to a rotary mechanical seal for rotating shafts passing into a pressure vessel, and in particular, to such a seal for a slurry pump.
  • the conventional mechanical seal used to seal the rotating shaft of a product pump comprises a stationary seal ring connected to the pump housing and a rotatable seal ring connected to the impeller shaft, each seal ring having a lapped seal face opposing the seal face on the other ring.
  • Resilient means such as coil springs and/or bellows urge one seal ring face toward the other in sealing relation.
  • Prior art seals use a number of different types of springs and combination of spring and primary seal made from metal and/or elastomeric material. Shown in Figure 1 is a typical coil spring mechanical seal. This utilises a coil spring 1 to urge the stationary sealing ring face 2 toward the rotating sealing ring 3. An o-ring 4 provides the seal between the axially adjustable stationary seal ring holder 5. This mechanical seal is susceptible to failure because of clogging of the coil spring by slurry products which leak between the sealing rings.
  • annular elastomeric members 6 are used to both urge the respective rotating 7 and stationary 8 sealing faces together, and to hold the rotating seal 7 in the rotating seal face carrier 9.
  • This seal is not so susceptible to clogging, but cannot withstand normal slurry pump pressures which tend to extrude the elastomeric rings 6 out of contact with the sealing faces 7 and 8 and their respective seal face carrier.
  • the present invention seeks to ameliorate these disadvantages by providing a mechanical seal, for rotating shifts passing into a pressure vessel, comprising a first seal face mounted on a first seal ring holder and a second seal face mounted on a second seal ring holder, a first elastomeric annular member engaging said first seal ring holder to urge said first seal face into sealing engagement with said second seal face, and a second elastomeric annular member located on said first seal ring holder to isolate the first annular from the internal pressure of said pressure vessel.
  • FIG. 3 shows one embodiment of the present invention in which only one set of annular members are used.
  • Figure 4 illustrates a second embodiment utilising a set 10 of annular members for each of the rotating and stationary sealing faces.
  • the rotating seal ring carrier 10 is attached by conventional means to the shaft 11.
  • the rotating seal ring 12 is carried on the seal ring carrier 10 by means of 15 the seal ring boot 13.
  • the stationary seal housing 14 projects into the opening of the pump, and is sealed therein by means of the O-ring 15.
  • the stationary seal ring 16 is held in the seal ring carrier 17 by means of the seal ring boot 18.
  • a first elastomeric annular 20 member 19 is located in a recess 20 in the stationary seal assembly 14 in such a manner .such that, it seals between the stationary seal ring carrier 10 and the stationary seal housing 14.
  • the outside diameter of the seal ring holder and the inside diameter of the stationary seal housing are such that 5 the first elastomeric annular member 19 is prevented from being extruded by the pump pressure between the stationary seal housing 14 and the stationary seal ring carrier 17.
  • a second elastomeric annular member 21 is located between - A - the stationary seal housing 14 and the seal ring holder 17 to urge the stationary seal ring 16 into sealing engagement with the rotating seal ring 12. This is enhanced by the opposed surfaces of the recess 22 being inclined to each other to "squeeze" the elastomeric member 21 toward the rotating seal ring 12.
  • the embodiment illustrated in Figure 4 operates in the same manner as that described above, except that the rotating sealing ring 12 is held in a rotating seat holder 23 which is identical to the stationary seal ring holder 17, which utilises first and second elastomeric annular members 24 and 25 to perform in the same manner with the rotating seal ring carrier 26, as the annular members 21 and 19 perform with the seal ring holder 17.
  • the elastomeric members 24 and 25 connects the rotating seal ring 12 with the drive shaft 11 of the slurry pump. Compression of the elastomeric member 25 is sufficient to maintain a friction drive without slip, whilst the first seal elastomeric member 24 locates and steadies the face in the radial direction and protects the elastomeric spring from blowout.
  • the stationary seal ring is connected to the housing by the second elastomeric assembly.
  • both elements are resistant to abrasive and corrosive attack;
  • the elastomeric spring provides a low spring constant which reduces the sensitivity to axial adjustment and allows easy fitment by unskilled personnel;
  • the primary elastomeric sealing element protects the spring from blowout whilst allowing the sealing ring carrier to move axially and ensure that the sealing rings remain in contact.
  • the seal of this invention can be mounted as a cartridge or adapted directly to the pump shaft and casing.
  • the seal assembly of the present invention provides clearances between parts which are greater than those in conventional seal assemblies, permitting leakage deposits to be removed from the assembly more easily.

Landscapes

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

Abstract

Joint d'étanchéité mécanique comprenant un premier élément (22) élastomère annulaire destiné à amener un premier anneau (16) d'étanchéité (fixe), monté sur un premier support (17) d'anneau d'étanchéité, en contact d'étanchéité avec un second anneau (13) d'étanchéité (rotatif) monté sur un second support (10) d'anneau d'étanchéité, fixé à un arbre (11) passant dans un récipient sous pression. Un second élément (19) élastomère annulaire isole le premier élément (22) élastomère annulaire de la pression interne et du contenu du récipient sous pression.
PCT/AU1988/000219 1987-06-29 1988-06-29 Joint d'etancheite mecanique WO1989000246A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU281087 1987-06-29
AUPI2810 1987-06-29

Publications (1)

Publication Number Publication Date
WO1989000246A1 true WO1989000246A1 (fr) 1989-01-12

Family

ID=3693303

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1988/000219 WO1989000246A1 (fr) 1987-06-29 1988-06-29 Joint d'etancheite mecanique

Country Status (1)

Country Link
WO (1) WO1989000246A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2935950A4 (fr) * 2012-12-20 2016-08-03 Caterpillar Inc Bague d'étanchéité munie d'une surface de charge de friction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB998762A (en) * 1961-11-01 1965-07-21 Neville Clyde Mccallum An improved sealing unit for bearings
AU5217764A (en) * 1963-11-29 1966-05-26 Crane Packing Company Sealing element for rotary mechanical seal
DE3141512A1 (de) * 1981-10-20 1983-05-05 Goetze Ag, 5093 Burscheid Gleit- und/oder gegenring einer gleitringdichtung
AU2957084A (en) * 1983-09-12 1985-03-21 Disposable Waste Systems, Inc. Rotary shaft seal
AU7409087A (en) * 1987-01-28 1988-08-04 Eagle Industry Co. Ltd. Mechanical seal for a slurry pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB998762A (en) * 1961-11-01 1965-07-21 Neville Clyde Mccallum An improved sealing unit for bearings
AU5217764A (en) * 1963-11-29 1966-05-26 Crane Packing Company Sealing element for rotary mechanical seal
DE3141512A1 (de) * 1981-10-20 1983-05-05 Goetze Ag, 5093 Burscheid Gleit- und/oder gegenring einer gleitringdichtung
AU2957084A (en) * 1983-09-12 1985-03-21 Disposable Waste Systems, Inc. Rotary shaft seal
AU7409087A (en) * 1987-01-28 1988-08-04 Eagle Industry Co. Ltd. Mechanical seal for a slurry pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2935950A4 (fr) * 2012-12-20 2016-08-03 Caterpillar Inc Bague d'étanchéité munie d'une surface de charge de friction
US9714713B2 (en) 2012-12-20 2017-07-25 Caterpillar Inc. Seal ring with frictional load surface

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