CA2500442A1 - Unitizing element and method for assembling a seal - Google Patents

Unitizing element and method for assembling a seal Download PDF

Info

Publication number
CA2500442A1
CA2500442A1 CA002500442A CA2500442A CA2500442A1 CA 2500442 A1 CA2500442 A1 CA 2500442A1 CA 002500442 A CA002500442 A CA 002500442A CA 2500442 A CA2500442 A CA 2500442A CA 2500442 A1 CA2500442 A1 CA 2500442A1
Authority
CA
Canada
Prior art keywords
stator
rotor
unitizing element
groove
engaging member
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
CA002500442A
Other languages
French (fr)
Other versions
CA2500442C (en
Inventor
Elizabeth Chitren
Christopher Tones
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.)
Garlock Sealing Technologies LLC
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2500442A1 publication Critical patent/CA2500442A1/en
Application granted granted Critical
Publication of CA2500442C publication Critical patent/CA2500442C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings
    • F16J15/4476—Labyrinth packings with radial path
    • F16J15/4478—Pre-assembled packings
    • 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
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings
    • F16J15/4472—Labyrinth packings with axial path
    • F16J15/4474—Pre-assembled packings

Abstract

An annular unitizing element (30) comprising a rotor engaging member (36), a stator engaging member (32), and a rear member (34). The radially outer surface of the unitizing element comprises two areas of differing diameter, one corresponding to the rotor engaging member and the other corresponding to the rear member. The stator engaging member extends radially inward from the radially inner side of the annular unitizing element. A sealing assembly for sealing a rotating shaft and a bearing housing (68) comprising a rotor (50) comprising, an annular engagement flange (52) extending in an axial direction comprising a groove (54) on a radial side thereof, a stator (10) comprising, an annular engagement flange (12) extending in an axial direction comprising a groove (14) on a radial side thereof, and an annular unitizing element comprising, a stator engaging member, a rotor engaging member, and a rear member.

Claims (23)

1. An annular unitizing element comprising; a rotor engaging member, a stator engaging member, and a rear member;
wherein the radially outer surface of the unitizing element comprises two areas of differing diameter, one corresponding to the rotor engaging member and the other corresponding to the rear member; and wherein the stator engaging member extends radially inward from the radially inner side of the annular unitizing element.
2. The unitizing element of claim 1 wherein the juncture between the two areas of differing diameter is substantially perpendicular to the axis of rotation.
3. The unitizing element of claim 1, wherein the stator engaging member extends from about the axial midpoint of the unitizing element.
4. The unitizing element of claim 1, wherein the unitizing element comprises a fluorinated polymer or resin.
5. The unitizing element of claim 1, wherein the unitizing element comprises filled polytetrafluoroethylene.
6. A sealing assembly for sealing a rotating shaft and a bearing housing comprising:
a rotor comprising:
an annular engagement flange extending in an axial direction comprising a groove on a radial side thereof;
a stator comprising:

an annular engagement flange extending in an axial direction comprising a groove on a radial side thereof; and an annular unitizing element comprising:
a stator engaging member;
a rotor engaging member; and a rear member;
wherein the rotor engaging member engages the rotor groove; and, wherein the stator engaging member extends from the unitizing element in a radial direction to engage the stator groove.
7. The sealing assembly of claim 6, wherein the rotor groove and stator groove are at least partially axially aligned forming a void therebetween;
8. The sealing assembly of claim 7, wherein the unitizing element is retained at least partially within the void formed by the at least partial alignment of the rotor groove and the stator groove.
9. The sealing assembly of claim 6, wherein the unitizing element further comprises two adjoining areas of differing diameter, one area corresponding to the rotor engagement member and the other corresponding to the rear member.
10. The unitizing element of claim 9, wherein the juncture between the two areas of differing diameter comprises a wall portion.
11. The sealing assembly of claim 10, wherein the unitizing element prevents separation of the rotor and stator in the event of axial movement by engaging a wall of the stator groove with the stator engaging member and engaging a wall of the rotor groove with the wall portion connecting the areas of differing diameter of the unitizing element.
12. The sealing assembly of claim 11, wherein the wall portion of the unitizing element is substantially perpendicular to the axis of rotation.
13. The sealing assembly of claim 6, wherein the unitizing element prevents contact between the rotor and stator by engaging the outer wall of the stator and the inner wall of the rotor in the event of axially movement of the rotor toward the stator.
14. The sealing assembly of claim 6, wherein the unitizing element comprises a fluorinated polymer or resin.
15. The sealing assembly of claim 6, wherein the unitizing element comprises a lubricious plastic material.
16. The sealing assembly of claim 6, wherein the unitizing element comprises filled polytetrafluoroethylene.
17. The sealing assembly of claim 6, wherein the stator further comprises a drainage port on the interior side of the seal, wherein lubricant is allowed to drain from the seal back into the bearing housing.
18. The sealing assembly of claim 6, wherein the stator further comprises an expulsion port on the atmospheric side of the seal, wherein contaminants may be expelled from the seal.
19. The sealing assembly of claim 6, wherein the stator further comprises an O-ring to sealingly engage the stator to a bearing housing, said O-ring residing within a groove formed in the radially outer circumference of the stator, said groove comprising a inner surface wherein one end of the inner surface is less deep than the opposing end of the inner surface to provide a locking mechanism to prevent movement of the stator in a direction away from the bearing housing.
20. The sealing assembly of claim 6, wherein the rotor further comprises an O-ring to sealingly engage the rotor to a shaft, said O-ring residing within a groove formed in the radially inner circumference of the rotor, said groove comprising a inner surface wherein one end of the inner surface is less deep than the opposing end of the inner surface to provide a locking mechanism to prevent movement of the rotor in a direction away from the bearing housing.
21. A method for assembling a sealing assembly for sealing a rotating shaft and a bearing housing comprising:
providing a rotor comprising:
an annular engagement flange extending in an axial direction comprising a groove on a radial side thereof;
providing a unitizing element comprising a stator engaging member, a rotor engaging member, a void comprising the area between the stator engaging member and the rotor engaging member, and a rear member;
engaging the unitizing element with the rotor such that the rotor engaging member of the unitizing element is retained within the groove on the rotor annul engagement flange;
providing a stator comprising an annular engagement flange extending in an axial direction comprising a groove on a radial side thereof; and engaging the rotor and unitizing element with the stator such that the stator engaging member deflects onto the void until the unitizing element is in position, then the stator engaging member extends into the area of the stator groove.
22. The method of claim 21 wherein the unitizing element further comprises filled polytetrafluoroethylene.
23. The method of claim 21 wherein the rotor groove and stator groove are at least partially axially aligned forming a void therebetween, and the unitizing element resides within said void.
CA2500442A 2002-09-30 2003-09-29 Unitizing element and method for assembling a seal Expired - Lifetime CA2500442C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US41486202P 2002-09-30 2002-09-30
US60/414,862 2002-09-30
PCT/US2003/030625 WO2004031628A1 (en) 2002-09-30 2003-09-29 Unitizing element and method for assembling a seal

Publications (2)

Publication Number Publication Date
CA2500442A1 true CA2500442A1 (en) 2004-04-15
CA2500442C CA2500442C (en) 2012-12-04

Family

ID=32069776

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2500442A Expired - Lifetime CA2500442C (en) 2002-09-30 2003-09-29 Unitizing element and method for assembling a seal

Country Status (9)

Country Link
US (3) US20040070150A1 (en)
EP (1) EP1546586B1 (en)
JP (2) JP2006501422A (en)
CN (1) CN100412425C (en)
AU (1) AU2003279040B2 (en)
BR (1) BRPI0306467B1 (en)
CA (1) CA2500442C (en)
MX (1) MXPA05003406A (en)
WO (1) WO2004031628A1 (en)

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Also Published As

Publication number Publication date
CN1688834A (en) 2005-10-26
EP1546586A1 (en) 2005-06-29
US20040070150A1 (en) 2004-04-15
CA2500442C (en) 2012-12-04
US20060087084A1 (en) 2006-04-27
JP2006501422A (en) 2006-01-12
AU2003279040B2 (en) 2009-04-23
BRPI0306467B1 (en) 2016-05-17
AU2003279040A1 (en) 2004-04-23
US7427070B2 (en) 2008-09-23
CN100412425C (en) 2008-08-20
WO2004031628A1 (en) 2004-04-15
BR0306467A (en) 2004-10-13
MXPA05003406A (en) 2005-08-02
US20070145690A1 (en) 2007-06-28
US7201377B2 (en) 2007-04-10
JP2011058635A (en) 2011-03-24
EP1546586B1 (en) 2014-05-14

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MKEX Expiry

Effective date: 20230929