WO1995010721A1 - Dispositif d'etancheite pour arbre tournant - Google Patents
Dispositif d'etancheite pour arbre tournant Download PDFInfo
- Publication number
- WO1995010721A1 WO1995010721A1 PCT/FR1994/001183 FR9401183W WO9510721A1 WO 1995010721 A1 WO1995010721 A1 WO 1995010721A1 FR 9401183 W FR9401183 W FR 9401183W WO 9510721 A1 WO9510721 A1 WO 9510721A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sealing device
- shaft
- sealing
- frame
- lip
- Prior art date
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
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/182—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings with lubricating, cooling or draining means
Definitions
- the present invention relates to a sealing device for a rotating shaft and in particular for a rotating pump shaft. More specifically, the present invention relates to a sealing device surrounding the rotating shaft which allows to effectively isolate the pump part proper in which is circulated the liquid passing through the pump and the mechanical drive part in rotation and guiding the pump shaft.
- a sealing device surrounding the rotating shaft which allows to effectively isolate the pump part proper in which is circulated the liquid passing through the pump and the mechanical drive part in rotation and guiding the pump shaft.
- a gland which is arranged around the shaft inside a packing box, this sealing being often supplemented by a groove or lantern.
- a lubricant for the seals.
- Different types of braids can be used to make the cable gland, in particular braids made of tallow hemp, braids covered with teflon which may be based on hemp or aramid fiber.
- the introduction of the lubrication liquid is most often done under pressure and may consist in injecting the liquid itself which circulates in the pump.
- the object of the present invention is to provide a sealing device for a rotating shaft and in particular a pump which makes it possible to avoid the drawbacks mentioned above by increasing the life of the sealing device and by simplifying the corresponding maintenance operations. when changing the sealing device.
- the rotating shaft sealing device comprising a frame surrounding said shaft, said sealing device being disposed between said shaft and said frame is characterized in that it comprises: a protective sleeve surrounding said shaft and secured at least in translation and in rotation of said shaft; a sealing grain surrounding said socket and integral in translation with said frame; and sealing means surrounding said socket and integral with said frame which comprise: a lantern with an annular groove integral with the frame and connected to a source of lubrication liquid,
- the fact that the seal between the grain and the lubrication groove is ensured by lip sealing rings makes it possible, on the one hand, to improve the seal in particular between the pump and the lubrication liquid and, on the other hand, to simplify maintenance operations since these lip sealing rings have a very long service life, these rings being arranged in the area where the press braids stuffing solutions of the prior art were actually inaccessible due to the presence of the lantern comprising the groove for injecting lubrication liquid.
- the protective sleeve is made of steel and is coated with a protective layer comprising 50 to 70% of the filler metal and 30 to 50% of binder.
- Such a composition of the protective layer ensures high mechanical resistance of the external face of the sleeve while having great ease of implementation.
- - Figure 1 is a longitudinal sectional view of a conventional type pump; and - Figure 2 is a longitudinal half-section of the sealing device according to the invention.
- FIG. 1 we will describe the general structure of a pump on which can be mounted the sealing device for rotating shaft.
- This pump comprises a volute 10 with its inlet pipe 12 and its outlet pipe 14.
- the scroll 10 is extended by a pump body 16 in which the rotating shaft 18 is mounted.
- On the first end 20 of the shaft is mounted the rotor 22 of the pump which is of course disposed inside the volute 10 and the second end 24 of the shaft is connected to a motor, not shown in the figure.
- the shaft 18 is guided in rotation by two bearings 26 and 28 fitted in a known manner with suitable ball bearings.
- the shaft or more precisely the rotor 20 is cantilevered with respect to the bearings 26 and 28. It is understood that it is necessary to provide a seal between the interior of the volute 10 in which the fluid circulates to put into circulation and the mechanical part for guiding in rotation of the shaft 18, this part being essentially constituted by the sets of bearings 26 and 28.
- FIG 1 there is shown schematically the sealing means 30 which are of course arranged between the volute 10 and the first bearing 28.
- the sealing device In this figure, there is voluntarily shown very schematically the sealing device.
- this essentially comprises a packing box 32 which is integral with the pump body 16 and which surrounds the shaft 18 to serve to maintain the sealing means 30 proper.
- FIG. 2 a sealing device 30 mounted inside the packing box 32 will be described in more detail.
- the shaft 18 is covered with a bushing. protection 40 which extends over at least the entire part of the shaft opposite the sealing device.
- the embodiment of the socket 40 will be described later in more detail. It suffices to know that the sleeve 40 is slidably fitted on the external face of the shaft 18.
- the packing box 32 has an internal counterbore 42 in which are engaged around the shaft 18 the various elements constituting the sealing device 30. If one moves along the shaft 18 from its end 20 carrying the rotor 22 towards its part engaged in the bearing 28, there is successively inside the counterbore 42 a bottom grain 44, two annular elastomeric sealing rings 46 and 48, an annular lantern 50 defining a annular groove 52 for the introduction of a lubrication liquid from the sealing device, and a plurality of packing braids 44, the assembly being kept compressed in the counterbore 42 by a gland 56. As best shown in the In FIG. 1, the gland 56 is held in place and tightened by screws such as 58.
- the background grain 44 is of the conventional type. It is made of bronze or incidentally ofPolon and essentially constitutes an interchangeable wearing part. It thus avoids, particularly in the event of vibrations, wear on the shaft or the packing box 32.
- the clearance e between the external face of the bush 40 and the internal face of the backbone 44 is very small, for example of the order of 0.2 mm, in order to reduce the specific pressure of the liquid pumped on the sealing device itself.
- the elastomeric sealing rings 46 and 48 are therefore disposed between the lubrication lantern 52 and the bottom grain 44. These two sealing rings are of the lip type and therefore comprise a fixing body 58 in contact with the bottom counterbore 42 and a deformable lip 60. The lips 60 are curved in the direction of the grain bottom 44 so that, under the effect of the pressure, the lips 60 tend to be applied against the shaft 18.
- the nature of the elastomer used to produce the rings 46 and 48 depends on the fluids conveyed by the pump or on the lubrication fluid. It is possible to provide rings 46 and 48 in which an annular spring is embedded in the lip 60 to increase the contact pressure between the lip and the external face of the shaft.
- the sealing rings can be made with the material sold under the brand VITON.
- the lantern 50 can be of the conventional type. It thus defines an annular groove for supplying lubrication liquid, has an inlet orifice 50 connected to a source of lubrication liquid and it preferably has opposite an outlet orifice for lubrication liquid not shown in FIG. 2 This evacuation orifice makes it possible to avoid any risk of overpressure of the lubrication liquid in this zone and therefore any risk of passage of the lubrication liquid towards the volute of the pump.
- braids 54 of cable gland there are several braids 54 of cable gland.
- the number of braids depends on the tightness that one wishes to achieve.
- the packing braids are preferably based on aramid fibers coated with Teflon.
- this arrangement ensures a very effective seal between the pump itself and the mechanical members for guiding the shaft while allowing easy maintenance of the entire pump.
- the packing braids 54 after disassembly of the gland 56, can easily be extracted from the packing box by any suitable means since access is free.
- the sealing means arranged beyond the lantern 52 and which are therefore not accessible unless major disassembly is carried out the question does not arise since the lip rings 46 and 48 have very high mechanical resistance and do not require frequent replacement.
- the braids 54 chosen also have a very long lifespan, typically at least of the order of 12 months.
- the quality of the seal prevents the passage of the pumped liquid to the mechanical part of the pump. This has two main advantages: on the one hand, the mechanical part of the corrosion which would be due to the liquid circulating in the pump; on the other hand, liquid losses are avoided, which can be important when the latter has a high value.
- the protective sleeve 40 is formed from a steel sleeve which is preferably not made of stainless steel but which may possibly be in certain cases on which a protective coating is produced.
- this coating has a thickness of approximately 1 mm.
- a mixture of 60% filler metal, more generally between 50 and 70%, and 40% of binder, more generally from 30 to 50%, is used.
- the binder allows a reflow to allow deposition and binding of the filler metal to a temperature of about 1200 ° C.
- the filler material may be chromium carbide, carbide tungsten, etc.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94930245A EP0678175A1 (fr) | 1993-10-12 | 1994-10-12 | Dispositif d'etancheite pour arbre tournant |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR93/12111 | 1993-10-12 | ||
FR9312111A FR2711205B1 (fr) | 1993-10-12 | 1993-10-12 | Dispositif d'étanchéité pour arbre tournant. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995010721A1 true WO1995010721A1 (fr) | 1995-04-20 |
Family
ID=9451737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1994/001183 WO1995010721A1 (fr) | 1993-10-12 | 1994-10-12 | Dispositif d'etancheite pour arbre tournant |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0678175A1 (fr) |
FR (1) | FR2711205B1 (fr) |
WO (1) | WO1995010721A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999002900A1 (fr) * | 1997-07-10 | 1999-01-21 | Tyco Flow Control Pacific Pty. Ltd. | Ensemble de palier formant dispositif d'etancheite a levres multiples |
WO2008141377A1 (fr) * | 2007-05-18 | 2008-11-27 | Apc Company Pty Ltd | Ensemble joint d'étanchéité |
AU2018204369B2 (en) * | 2007-05-18 | 2020-07-23 | Apc Company Pty Ltd | Seal Assembly |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2782986A1 (fr) * | 2011-11-23 | 2014-10-01 | ABB Research Ltd. | Système de scellement, robot industriel doté d'un système de scellement, et procédé apportant une surface de scellement |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1142283A (fr) * | 1956-03-02 | 1957-09-16 | Wauquier Soc Nouv Ets | Procédé et dispositif pour refroidir les garnitures d'étanchéité d'arbres tournants de machine pour fluides liquides ou gazeux à haute température |
GB1311058A (en) * | 1971-12-14 | 1973-03-21 | Warwick Pump & Eng Co | Fluid sealing devices |
GB2093538A (en) * | 1981-02-20 | 1982-09-02 | Howaldtswerke Deutsche Werft | A sealing assembly for a rotating member |
US4613140A (en) * | 1984-10-17 | 1986-09-23 | Knox Gary W | Self-aligning lubricating stuffing box |
-
1993
- 1993-10-12 FR FR9312111A patent/FR2711205B1/fr not_active Expired - Fee Related
-
1994
- 1994-10-12 EP EP94930245A patent/EP0678175A1/fr not_active Withdrawn
- 1994-10-12 WO PCT/FR1994/001183 patent/WO1995010721A1/fr not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1142283A (fr) * | 1956-03-02 | 1957-09-16 | Wauquier Soc Nouv Ets | Procédé et dispositif pour refroidir les garnitures d'étanchéité d'arbres tournants de machine pour fluides liquides ou gazeux à haute température |
GB1311058A (en) * | 1971-12-14 | 1973-03-21 | Warwick Pump & Eng Co | Fluid sealing devices |
GB2093538A (en) * | 1981-02-20 | 1982-09-02 | Howaldtswerke Deutsche Werft | A sealing assembly for a rotating member |
US4613140A (en) * | 1984-10-17 | 1986-09-23 | Knox Gary W | Self-aligning lubricating stuffing box |
Non-Patent Citations (1)
Title |
---|
A.H. LAIRD: "Sealing slurry pumps", WORLD PUMPS, no. 319, April 1993 (1993-04-01), OXFORD GB, pages 12 - 14 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999002900A1 (fr) * | 1997-07-10 | 1999-01-21 | Tyco Flow Control Pacific Pty. Ltd. | Ensemble de palier formant dispositif d'etancheite a levres multiples |
WO2008141377A1 (fr) * | 2007-05-18 | 2008-11-27 | Apc Company Pty Ltd | Ensemble joint d'étanchéité |
AU2018204369B2 (en) * | 2007-05-18 | 2020-07-23 | Apc Company Pty Ltd | Seal Assembly |
Also Published As
Publication number | Publication date |
---|---|
FR2711205A1 (fr) | 1995-04-21 |
EP0678175A1 (fr) | 1995-10-25 |
FR2711205B1 (fr) | 1996-01-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2870323A1 (fr) | Dispositif de joint d'etancheite de palier de turbomachine avec deux joints elastiques | |
FR2739420A1 (fr) | Pompe a eau | |
WO2012076762A1 (fr) | Ensemble de palier pour arbre d'hydrolienne et hydrolienne comprenant un tel ensemble de palier | |
FR2867229A1 (fr) | Palier a roulement de turbomachine a encombrement reduit | |
FR2524599A1 (fr) | Joint pour tube d'etambot | |
EP0678175A1 (fr) | Dispositif d'etancheite pour arbre tournant | |
CA2794198A1 (fr) | Bague autolubrifiante d'articulation destinee a etre montee sur un axe | |
FR2540213A1 (fr) | Dispositif d'etanchement d'un arbre rotatif, ensemble a arbre rotatif equipe de ce dispositif et turbocompresseur dont le rotor est muni dudit dispositif | |
EP0815376A1 (fr) | Dispositif de robinetterie | |
EP1055848A1 (fr) | Dispositif de joint d'étanchéite d'enceinte de palier de turbomachine avec portance | |
FR2643968A1 (fr) | Passage etanche d'un arbre a travers l'evidement d'un palier | |
EP2327893B1 (fr) | Ensemble de palier pour arbre d'hydrolienne et hydrolienne comprenant un tel ensemble de palier | |
EP0271384B1 (fr) | Dispositif assurant la circulation d'un lubrifiant dans un circuit de lubrification d'un moteur à combustion interne | |
FR2897639A1 (fr) | Dispositif anti-usure pour systeme de calage variable d'aube d'une turbomachine | |
FR2527730A1 (fr) | Robinet a boisseau spherique | |
FR3094031A1 (fr) | Ensemble pour une turbomachine | |
FR2765653A1 (fr) | Dispositif de confinement a gaz supportant temporairement une surpression elevee | |
EP0487393A1 (fr) | Mécanisme à fluide sous pression dit "à came tournante" | |
EP3966477B1 (fr) | Garniture d'etancheite compacte pour assurer l'etancheite entre un arbre rotatif et un corps stationnaire d'une machine | |
EP1186813B1 (fr) | Joint carbone axial sans contact pour une enceinte de palier | |
FR2656902A1 (fr) | Dispositif d'etancheite pour pompe, en particulier pour pompe a eau de circuit de refroidissement. | |
EP4219967B1 (fr) | Composant articulé, et système mécanique comprenant un tel composant | |
FR2697598A1 (fr) | Dispositif de protection contre l'entrée de particules et de polluants solides. | |
FR2656058A3 (fr) | Disposition d'etancheite pour arbre tournant. | |
FR3044348A1 (fr) | Pompe volumetrique, notamment a piston ou a vis a mouvement excentre comportant un dispositif d'etancheite rigoureuse |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1994930245 Country of ref document: EP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
ENP | Entry into the national phase |
Ref country code: US Ref document number: 1995 448337 Date of ref document: 19950719 Kind code of ref document: A Format of ref document f/p: F |
|
WWP | Wipo information: published in national office |
Ref document number: 1994930245 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1994930245 Country of ref document: EP |