EP0136057A2 - Dispositif d'étanchéité pour tige soupape - Google Patents

Dispositif d'étanchéité pour tige soupape Download PDF

Info

Publication number
EP0136057A2
EP0136057A2 EP84305683A EP84305683A EP0136057A2 EP 0136057 A2 EP0136057 A2 EP 0136057A2 EP 84305683 A EP84305683 A EP 84305683A EP 84305683 A EP84305683 A EP 84305683A EP 0136057 A2 EP0136057 A2 EP 0136057A2
Authority
EP
European Patent Office
Prior art keywords
valve stem
seal
elastomeric
moulding
flange
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.)
Withdrawn
Application number
EP84305683A
Other languages
German (de)
English (en)
Other versions
EP0136057A3 (fr
Inventor
Charles William Potter
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.)
JH Fenner and Co Ltd
Original Assignee
JH Fenner and Co 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 JH Fenner and Co Ltd filed Critical JH Fenner and Co Ltd
Publication of EP0136057A2 publication Critical patent/EP0136057A2/fr
Publication of EP0136057A3 publication Critical patent/EP0136057A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant

Definitions

  • This invention relates to valve stem seals for use especially but not exclusively on inlet and exhaust valves.
  • valve stem seals according to this invention are developments of the valve stem seals which are disclosed in our copending Patent Application No: 82 17285 filed 15th June 1982 (Publication No: 2 105 403).
  • valve stem seal incorporating a lubricant metering collar for contact with a valve stem and constituted by a film of polytetrafluoroethylene (PTFE) of frusto-conical shape and having on its stem-adjacent surface a series of ribs, preferably helical, defining lubricant control passages.
  • PTFE polytetrafluoroethylene
  • valve stem seals which are disclosed in our aforesaid Patent Application can be considered to be fabricated seals which are relatively expensive to produce and which, in production, require the employment of manual labour in assembly.
  • valve stem seal has, as aforesaid, a frusto-conical shaped metering collar of PTFE film and the object of the present invention is achieved by providing a valve stem seal comprising an elastomeric moulding adapted to lip seal against a valve stem and at its lip sealing region to be helically ribbed on its stem-adjacent surface to define lubricant control passages, the elastic moulding also providing downstream of its lip seal, in terms of lubricant flow, a control collar adapted to contact the valve stem to provide both a compensation for lateral loading of the valve stem resulting from rocker action and a secondary seal.
  • the collar may be integral with the elastomeric moulding.
  • the collar is a plastics ring, preferably but not exclusively formed of PTFE, held within the elastomeric moulding in non-bonded relationship.
  • the elastomeric moulding preferably has at its outer or upper end,when assembled on a valve stem,a frusto-conical portion engaging the valve stem to make the lip seal or contact.
  • the ribbing is cut, moulded or otherwise formed on the elastomeric moulding.
  • the plastics control ring is preferably located in an annular recess of the elastomeric moulding on a supporting integral annular ledge of the latter.
  • control collar of whatever construction is preferably determined by the pulsating negative or positive operating pressure conditions of the valve.
  • negative pulsating operating pressure can be down to -25 hg., while positive pulsating operating pressure can be up to 15 lbs. per square inch.
  • a valve stem seal according to the invention engages a valve stem 10 and valve stem guide 11.
  • the valve stem seal comprises a synthetic rubber moulding 12 having an upper frusto-conical portion 13 externally grooved as indicated at 14 to accommodate a garter spring 15 which urges the frusto-conical portion 13 into lip contact or sealing with the valve stem 10 as indicated at 16 (see Fig. 3).
  • the synthetic rubber moulding 12 also closely embraces the valve stem guide 11 as indicated at 17, and said embrace is maintained either by a closed coil spring 17A or a circlip 17B engaging in a circumferential recess 12A of the synthetic rubber moulding 12.
  • the inner surface of the moulding 12 at its lip contact region 16 is helically ribbed at 19 for its whole circumference to provide lubricant control passages which serve to meter sufficient oil to control the amount of wear on the valve stem 11.
  • the inner surface of the synthetic rubber moulding 12 has an inwardly-directed flange 20 which with the frusto-conical portion 13 defines a groove 21.
  • a plastics, preferably PTFE, control ring 22 Into this groove 21 is received a plastics, preferably PTFE, control ring 22.
  • This ring 22 is not bonded in position but is merely retained in the groove 21 by the inherent elasticity of the synthetic rubber moulding 13 or is scarf jointed for fitment into the groove 21.
  • This control ring 22 serves the dual function of compensating for the lateral loading on the valve stem 11 resulting from the rocker action and of providing a secondary seal resisting back-flow of lubricant.
  • the bore configuration at-the control ring 22B and flange 20B and generally indicated at 23 is suitable for pressure operating conditions where pressure downstream of the seal exceeds pressure external of the seal.
  • the bore configuration 24 at control ring 22C and flange 20C is suitable for conditions where negative pressure prevails downstream of the seal.
  • the internal flange 20C is of greater length than flanges 20 to 20B and it defines a bore defining an angled of between 25 0 and 30° with the central axis of the valve stem 10. This ensures a superior passage (compared with the other embodiments) of each metered quantity of lubricant on the downstroke of the valve stem 10.
  • the angled flange 20C pressurises in the direction of the valve stem 10 and prevents lubricant being forced back, i.e. it assists the one-way downward flow of lubricant.
  • valve stem seals With all of these valve stem seals the frusto-conical portion 13 above the centreline of the garter spring 15 provides sufficient flexibility to accommodate any lateral movement arising from any worn condition of the valve stem 10 and guide 11.
  • the shape factor at 16 remains truly circular as no sealing force is exerted at this location, the frusto-conical portion 13 being cantilevered from the centreline of the garter spring 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
EP84305683A 1983-09-01 1984-08-21 Dispositif d'étanchéité pour tige soupape Withdrawn EP0136057A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8323418 1983-09-01
GB838323418A GB8323418D0 (en) 1983-09-01 1983-09-01 Valve stem seals

Publications (2)

Publication Number Publication Date
EP0136057A2 true EP0136057A2 (fr) 1985-04-03
EP0136057A3 EP0136057A3 (fr) 1986-04-16

Family

ID=10548155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84305683A Withdrawn EP0136057A3 (fr) 1983-09-01 1984-08-21 Dispositif d'étanchéité pour tige soupape

Country Status (2)

Country Link
EP (1) EP0136057A3 (fr)
GB (2) GB8323418D0 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621954A1 (fr) * 1987-10-14 1989-04-21 Dana Corp Joint de soupape unitaire en matiere plastique moulee
DE19945348A1 (de) * 1999-09-22 2001-04-19 Freudenberg Carl Fa Dichtung für hin- und hergehende Maschinenteile
US6764079B1 (en) * 2002-04-19 2004-07-20 Dana Corporation Valve seal assembly with straight-walled retainer
EP1854965A1 (fr) * 2006-05-02 2007-11-14 Carl Freudenberg KG Joint à huile
US7299779B2 (en) * 2004-09-29 2007-11-27 Dana Corporation Upside-down square-up valve stem seal
EP2730757A4 (fr) * 2011-07-09 2014-05-14 Nok Corp Dispositif de joint pour tige de soupape

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763618A (en) * 1987-04-03 1988-08-16 Microdot Inc. Valve stem oil deflector
DE3836578A1 (de) * 1988-10-27 1990-05-03 Goetze Ag Ventilschaftabdichtung fuer verbrennungskraftmaschinen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1078586A (en) * 1912-04-22 1913-11-11 George C Knauff Socket for electric lamps.
GB2049071A (en) * 1979-05-07 1980-12-17 Supertex Spa Seals
EP0112959A2 (fr) * 1982-12-08 1984-07-11 Firma Carl Freudenberg Joint

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2105403B (en) * 1981-06-17 1984-09-19 Fenner Co Ltd J H I c engine intake and exhaust valve stem seals

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1078586A (en) * 1912-04-22 1913-11-11 George C Knauff Socket for electric lamps.
GB2049071A (en) * 1979-05-07 1980-12-17 Supertex Spa Seals
EP0112959A2 (fr) * 1982-12-08 1984-07-11 Firma Carl Freudenberg Joint

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621954A1 (fr) * 1987-10-14 1989-04-21 Dana Corp Joint de soupape unitaire en matiere plastique moulee
DE19945348A1 (de) * 1999-09-22 2001-04-19 Freudenberg Carl Fa Dichtung für hin- und hergehende Maschinenteile
DE19945348C2 (de) * 1999-09-22 2003-07-10 Freudenberg Carl Kg Dichtung für hin- und hergehende Maschinenteile
US6764079B1 (en) * 2002-04-19 2004-07-20 Dana Corporation Valve seal assembly with straight-walled retainer
US7299779B2 (en) * 2004-09-29 2007-11-27 Dana Corporation Upside-down square-up valve stem seal
EP1854965A1 (fr) * 2006-05-02 2007-11-14 Carl Freudenberg KG Joint à huile
EP2730757A4 (fr) * 2011-07-09 2014-05-14 Nok Corp Dispositif de joint pour tige de soupape
EP2730757A1 (fr) * 2011-07-09 2014-05-14 Nok Corporation Dispositif de joint pour tige de soupape

Also Published As

Publication number Publication date
GB2145771B (en) 1987-06-24
GB8323418D0 (en) 1983-10-05
GB8421222D0 (en) 1984-09-26
EP0136057A3 (fr) 1986-04-16
GB2145771A (en) 1985-04-03

Similar Documents

Publication Publication Date Title
US2804325A (en) Fluid seal
US5553869A (en) Bonded valve stem seal with retainer tangs
US4811704A (en) Valve stem seal
CA1254593A (fr) Garniture plurifonction aux fluides pour registres d'aeraulique et leurs analogues
EP1028238B1 (fr) Clapet d'air à faible fuite pour système d'admission d'air à géométrie variable
US4368756A (en) Check valve
EP0136057A2 (fr) Dispositif d'étanchéité pour tige soupape
EP0544458B1 (fr) Dispositif d'étanchéité pour tige de soupape
US8864106B2 (en) Valve seat apparatus having positive retention for use with fluid control devices
US4662598A (en) Sleeve valve with integral control chamber
CA2020191C (fr) Joint tronconique pour tige de robinet
US8500420B2 (en) Suction valve with unloader
US2744772A (en) Devices for effecting a tight fit between a revolving part and a fixed part
US4124220A (en) Lubricant seals
US4317436A (en) Valve stem seal
US3498621A (en) Valve stem seal
MX2007012934A (es) Valvula con sello de doble carga.
GB2089943A (en) Valve
US3310064A (en) Valve core
US3238886A (en) Fuel pump
CN205715716U (zh) 低温切断阀
CN101338818B (zh) 油膜轴承密封装置
CN208268408U (zh) 一种多唇油封装置
JPS5931962Y2 (ja) 耐圧シ−ル
JP4609636B2 (ja) 密封装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19861217

RIN1 Information on inventor provided before grant (corrected)

Inventor name: POTTER, CHARLES WILLIAM