WO1999008026A1 - Mechanical seal for rotating shaft - Google Patents
Mechanical seal for rotating shaft Download PDFInfo
- Publication number
- WO1999008026A1 WO1999008026A1 PCT/IB1997/000984 IB9700984W WO9908026A1 WO 1999008026 A1 WO1999008026 A1 WO 1999008026A1 IB 9700984 W IB9700984 W IB 9700984W WO 9908026 A1 WO9908026 A1 WO 9908026A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ring
- branches
- movable
- washer
- axial
- Prior art date
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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
- F16J15/3452—Pressing means the pressing force resulting from the action of a spring
Definitions
- the present invention relates to mechanical seals for rotating shafts.
- Such seals are used to seal between a rotating shaft and a fixed support through which it passes.
- the invention relates to those which comprise a fixed sealing ring, integral with the support and in sealing relationship with it, a mobile sealing ring, rotating with the shaft and in facial contact with sealing with the fixed ring, a movable bush, integral with the shaft and axially distant from the movable sealing ring, and elastic means which cooperate with the movable ring and the movable bush and which are arranged, on the one hand, to elastically urge the movable ring in the axial direction against the fixed ring and, on the other hand, to transmit to the movable ring the rotational movement of the shaft and of the movable bush.
- a mechanical seal is described for example in document FR-A-2,594,519.
- the elastic means consist of an axial bellows comprising annular mounting ends.
- the annular ends of the bellows are secured, respectively, to the movable bushing and the movable ring, sealing means being provided at the ends of the bellows, respectively between the bellows and the shaft. , at the movable sleeve, and between the bellows and the movable ring, at the other end. In operation, this seal is satisfactory, but it is of a relatively complex structure and manufacture, and therefore costly.
- EP-A-365 138 also discloses a seal of the same type, in which the elastic means consist of one or two wavy washers forming an axial spring and carrying drive studs which cooperate with complementary cavities provided in the radial faces opposite the movable ring and the movable bush.
- the object of the invention is to improve and simplify these fittings without harming their functional characteristics.
- the gasket according to the invention is characterized in that the elastic means comprise: a radial washer; connecting means, at least in a rotational drive relationship, between the washer and one, first, of said movable ring and sleeve; and axial branches, carried by the radial washer, forming corrugations in the axial direction and arranged to cooperate by their free end with the other, second, of said ring and bush movable at least in a rotational drive relationship.
- the radial washer and the axial branches are made of sheet metal, in particular stainless steel, machined for example by wire EDM or press.
- the elastic means comprise at least two regularly distributed branches, and preferably three branches at 120 °.
- the branches start from the contour of the washer, preferably from the outer contour of the latter.
- said second of said movable ring and bush has for example an annular groove on its radial face turned towards said first of said movable bush and bush.
- the groove advantageously has a shoulder or axial retaining rim of the free end of the branches folded back.
- the movable sleeve is secured to the rotating shaft by at least one screw which interferes with said groove to cooperate with the free end of at least one of the branches in a rotational drive relationship.
- these consist of a second series of branches, shorter than the previous ones, preferably alternated with these, and cooperating with axial notches formed at the periphery of said first said movable ring and socket; the branches of this second series advantageously have a free end which is folded for the axial retention between the elastic means and said first of said movable ring and bush.
- said first of said movable ring and sleeve has, on its face of cooperation with the elastic means, radial notches for receiving the feet of said axial branches forming undulations.
- the radial washer comprises, in its plane and on its outer periphery, axial retaining projections arranged to be housed behind a shoulder of said first of said movable ring and sleeve.
- the bottom of said radial notches and the retaining face of said shoulder are axially spaced apart by a distance substantially equal to the thickness of the radial washer.
- the radial washer and the axial branches can be constituted either by a single piece, or by separate pieces made integral.
- the radial washer cooperates with the movable ring, while the free ends of the axial branches cooperate with the movable sleeve.
- annular seal is placed between the fixed ring and the support through which the shaft passes, and an annular seal is placed between the movable ring and the shaft, so that exemption from sealing means at the movable sleeve or at the end of the elastic means cooperating with the latter.
- the operating liquid surrounds the mobile ring, except in the area of the fixed ring and the shaft, which allows cooling and possibly lubrication of the mobile ring.
- Fig. 1 is an axial section, taken along the line I-I of FIG. 2, a mechanical seal established according to a first embodiment of the invention
- FIG. 1A and 1B show, on a larger scale, two details of FIG. 1;
- Fig. 2 is a cross-sectional view of the packing of FIG. 1, taken along the broken line II-II of this Figure;
- Fig. 3 is an axial view of a single piece forming a spring and means for driving in rotation, this piece being considered flat before its conformation;
- FIG. 4 shows, on a larger scale, another detail of FIG. 1;
- Fig. 5 is an axial view of the movable sealing ring of a mechanical sealing gasket established according to a second embodiment of the invention
- Fig. 6 is an exploded axial section showing, on the one hand, the movable ring of FIG. 5, in the cutting plane VI-VI and, on the other hand, a single piece also forming a spring and means for driving in rotation;
- Fig. 7 is an axial view of the single part used with the movable ring of FIGS. 5 and 6, this single piece being considered flat before its conformation;
- Fig. 8 is a view similar to FIGS. 3 and 7, relative to a third embodiment of the elastic means
- Fig. 9 shows, in section along the line IX-IX of FIG. 8, the structure of the radial washer of FIG. 8;
- Fig. 10 is a plan view of an axial branch of FIG. 8, before it is fixed to the radial washer and before it is folded; and Fig. 11 shows, in section along the line XI-XI of FIG. 10, a detail of the axial strip.
- FIGs. 1, 1A, 1B and 2 There is shown in Figs. 1, 1A, 1B and 2 a rotating shaft 1 which passes through a fixed support 2.
- the space 3 inside the support 2 contains a fluid, for example of lubrication or of operation, and the lining is intended to seal the passage from shaft 1 through support 2.
- the mechanical seal has, in known manner, a fixed ring 4, in sealing relation with the support 2 by an annular seal 5 disposed between the fixed ring and the support, a movable seal ring 6, rotating with the shaft 1 and in facial sealing contact with the fixed ring, by cooperation at 7 of the planar radial faces of the fixed ring and of the movable ring, a movable bush 8, integral with the shaft 1 and axially distant from the movable ring 6, and elastic means 9 which cooperate with the movable ring 6 and the sleeve 8 and which are arranged, on the one hand, to elastically urge the movable ring in the axial direction against the fixed ring and, on the other hand , to transmit to the movable ring the rotational movement of the shaft 1 and of the sleeve 8.
- the shaft 1 passes through the support 2, the fixed ring 4 and the movable ring 6 with a functional radial clearance, and an annular seal 10 is placed between the movable ring 6 and the shaft 1.
- This seal is for example placed in a groove, which allows the radial face of the movable ring 6 to be released for its cooperation with the elastic means 9.
- the elastic means 9 consist of a single piece and are made of sheet metal, for example of stainless steel cut by wire EDM, which avoids crack initiation. Alternatively, this unique piece could be worked with the press. There is shown in Figs. 3 and 7, according to two embodiments, the single piece 9 as obtained after cutting, that is to say flat and before its final conformation.
- the radial washer 11 is intended to come into facial contact with the movable ring 6 or the movable sleeve 8; in the adopted embodiment, the washer 11 is in contact with the movable ring 6. As a variant, the washer it could rest against the seal 10 projecting axially relative to the ring 6.
- the branches 12 are short and are intended, after a first 90 ° folding, to cooperate with axial notches 14 formed at the periphery of the movable ring 6 and, after a second 90 ° folding at their free end, to cooperate with the opposite radial face of the ring 6 to ensure axial retention and centering between the single part 9 and the ring 6 (Fig. 1B).
- the branches 13 are much longer than the branches 12 and are intended, after folding at 90 ° relative to the washer 11, and in the axial direction opposite to that of the first folding of the branches 12, to form corrugations 15 in the direction axial, their ends 16, which preferably end with a narrowed finger 17, being received in an annular groove 18 formed on the radial face of the sleeve 8 which is turned towards the movable ring 6.
- the groove 18 has, near its outlet on the radial face of the sleeve 8, a shoulder or rim 19 for axial retention of the finger 17 folded back and radially outwards, substantially at 45 ° with respect to 1 axis of 1 shaft 1.
- the branches 12, 13 start from the external contour of the washer 11 and, consequently, the notches 14 are formed on the external periphery of the movable ring 6.
- branches 12 and 13 of the two series are alternated, preferably regularly, and each series comprises at least two regularly distributed branches, and preferably three branches at 120 °, as shown in the drawings.
- the sleeve 8 is immobilized on the shaft 1 by at least one radial screw 20 which, preferably, interferes with the groove 18 so as to constitute a stop in rotation for the ends 16 of the branches 13 and thus to transmit to the part 9 the rotational movement of the shaft 1.
- two screws 20 are provided at 120 ° for two of the branches 13, but a third screw 20 can also be provided for the other branch 13.
- the rotational connection means between the single part 9 and the movable ring 6 are constituted by the feet 21 of the axial branches 13 themselves. These feet are the connecting part of the branches 13 with the radial washer 11.
- the movable ring 6 has, on its face for cooperating with the single piece, radial notches 22, of the same width as the branches 13. Because the feet 21 of the branches 13 are housed in the notches 22, the rotational drive of the movable ring 6 is thus carried out by the single piece 9 by the branches 13 themselves without it being necessary, as in the embodiment of FIGS. 1 to 4, to provide additional branches.
- means are also provided for ensuring the axial retention between the movable ring 6 and the single part
- the movable ring 6 has, on the side of the single part 9, a rim 23 projecting radially inwards which defines, in the ring 6, an internal radial shoulder 24 intended to cooperate with projections 25 which are provided in the plane of the washer 11 and on the outer periphery thereof, on each side of the legs 21.
- the flange 23 has an inner diameter slightly smaller than the outer diameter of the projections 25, these coming to be housed behind the rim 23, against the shoulder 24, by elastic deformation.
- the bottom of the radial notches 22 and the retaining face of the shoulder 24 are axially spaced by a distance substantially equal to the thickness of the washer 11 so that it is received without play and therefore does not float.
- the washer 11 is not in facial contact with the movable ring 6. It is radially set back relative to the notches 22 which receive the feet 21 of the axial branches 13. It is therefore the feet 21 which communicate to the movable ring 6 both the axial biasing forces against the fixed ring 4 and the rotational driving forces.
- This embodiment differs from the previous ones essentially by the fact that the elastic means 9 are not constituted by a single piece, but by separate pieces which are joined together.
- the radial washer 11 is for example constituted by the superposition and the assembly of two identical elementary washers (Fig. 9). Furthermore, the washer
- the axial branches 13 comprise, as previously, a narrowed finger 17 which ends in teeth 27 favoring the axial retention of the branches in the groove 18 (Fig. 1 ).
- each branch 13 has a narrowed finger 28 assembly intended to be folded at 180 ° to trap the washer 11 in the U thus formed by overlapping its inner edge.
- each branch 13 carries a stop 29, for example a stamping puncture, intended to cooperate with the outside edge of the washer 11. The latter is thus trapped between the finger 28 and the stop 29.
- the narrowed fingers 17 cooperate with the movable sleeve 8 as described with reference to Figs. 1 to 4.
- the washer 11 For the cooperation of the washer 11 - branches 13 assembly with the movable ring 6, the latter is similar to that of FIGS. 5 and 6, that is to say that it has radial notches 22 for the reception of the feet 21 of the branches 13 and that the washer 11 is radially set back relative to the notches 22, without facial contact with the movable ring 6. As in the embodiment of Figs. 5 to 7, the washer 11 therefore only serves to connect the branches 13.
- the feet 21 of the branches 13 could have projections, such as the projections 25 of FIG. 7, which is housed elastically behind a shoulder of the movable ring 6.
- the mechanical seal according to the invention has many advantages, mainly due to its simplicity, and in particular the following: the manufacturing tolerances are very wide for all the components, without the the effectiveness of the packing is affected; the sleeve 8 having no direct sealing role, it can be obtained by simple turning; the lining is preferably in one piece, which avoids the risk of breakage and release during assembly; the packing works for both directions of rotation of the shaft 1, due to the fact that, after a possible vacuum movement, the branches 13 abut against another screw 20; the elastic arms 13 allow axial movement of the movable ring without any risk of jamming; the fact that the movable ring 6 is almost entirely surrounded by the fluid, its cooling and possibly its lubrication are ensured, in particular at the level of the zone of cooperation 7 with the fixed ring 4; the packing is completely open, which eliminates the risk of blockage by the fluid; and the movable ring 6, because it can float radially, does not necessarily have an axis of symmetry.
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- General Engineering & Computer Science (AREA)
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- Mechanical Sealing (AREA)
Abstract
The invention concerns a mechanical seal for a rotating shaft (1), comprising a fixed sealing ring (4), in sealing relationship with a support (2) traversed by the shaft (1), a mobile sealing ring (6) rotating with the shaft (1) and in sealing surface contact (7) with the fixed sealing ring (4), a mobile sleeve (8), integral with the shaft and axially spaced from the mobile sealing ring, and elastic means (9) co-operating with the mobile ring (4) and the mobile sleeve (8) and which are arranged to urge elastically in the axial direction the mobile ring against the fixed ring and to transmit to the mobile ring the rotating movement of the shaft and the mobile sleeve. The invention is characterised in that the elastic means comprise: a radial washer (11); linking means (12), at least in a rotating relationship, between the washer and one and the first of said mobile ring and bush; and axial branches (13) borne by the axial washer, forming undulations (15) in the axial direction and arranged to co-operate by their free end (16) with the other and second of said mobile ring and bush at least in a rotating relationship.
Description
GARNITURE MECANIQUE D'ETANCHEITE POUR ARBRE TOURNANT MECHANICAL SEALING FOR A ROTATING SHAFT
La présente invention est relative aux garnitures mécaniques d'étanchéité pour arbre tournant.The present invention relates to mechanical seals for rotating shafts.
De telles garnitures sont utilisées pour assurer l'étanchéité entre un arbre tournant et un support fixe traversé par celui-ci.Such seals are used to seal between a rotating shaft and a fixed support through which it passes.
Parmi ces garnitures, l'invention concerne celles qui comportent une bague d'étanchéité fixe, solidaire du support et en relation d'étanchéité avec celui-ci, une bague d'étanchéité mobile, tournant avec l'arbre et en contact facial d'étanchéité avec la bague fixe, une douille mobile, solidaire de l'arbre et distante axialement de la bague d'étanchéité mobile, et des moyens élastiques qui coopèrent avec la bague mobile et la douille mobile et qui sont agencés, d'une part, pour solliciter élastiquement dans le sens axial la bague mobile contre la bague fixe et, d'autre part, pour transmettre à la bague mobile le mouvement de rotation de l'arbre et de la douille mobile. Une telle garniture mécanique est décrite par exemple dans le document FR-A-2.594.519. Dans' ce document, les moyens élastiques sont constitués par un soufflet axial comportant des extrémités annulaires de montage. Dans deux modes de réalisation décrits dans ce document, les extrémités annulaires du soufflet sont solidaires, respectivement, de la douille mobile et de la bague mobile, des moyens d'étanchéité étant prévus aux extrémités du soufflet, respectivement entre le soufflet et l'arbre, au niveau de la douille mobile, et entre le soufflet et la bague mobile, à l'autre extrémité. En fonctionnement, cette garniture donne toute satisfaction, mais elle est d'une structure et d'une fabrication relativement complexes, et par conséquent coûteuses.Among these seals, the invention relates to those which comprise a fixed sealing ring, integral with the support and in sealing relationship with it, a mobile sealing ring, rotating with the shaft and in facial contact with sealing with the fixed ring, a movable bush, integral with the shaft and axially distant from the movable sealing ring, and elastic means which cooperate with the movable ring and the movable bush and which are arranged, on the one hand, to elastically urge the movable ring in the axial direction against the fixed ring and, on the other hand, to transmit to the movable ring the rotational movement of the shaft and of the movable bush. Such a mechanical seal is described for example in document FR-A-2,594,519. In this document, the elastic means consist of an axial bellows comprising annular mounting ends. In two embodiments described in this document, the annular ends of the bellows are secured, respectively, to the movable bushing and the movable ring, sealing means being provided at the ends of the bellows, respectively between the bellows and the shaft. , at the movable sleeve, and between the bellows and the movable ring, at the other end. In operation, this seal is satisfactory, but it is of a relatively complex structure and manufacture, and therefore costly.
On connaît également, par le document EP-A-365 138, une garniture d'étanchéité du même type, dans laquelle les
moyens élastiques sont constitués par une ou deux rondelles ondulées formant ressort axial et portant des plots d'entraînement qui coopèrent avec des cavités complémentaires prévues dans les faces radiales en regard de la bague mobile et de la douille mobile.EP-A-365 138 also discloses a seal of the same type, in which the elastic means consist of one or two wavy washers forming an axial spring and carrying drive studs which cooperate with complementary cavities provided in the radial faces opposite the movable ring and the movable bush.
On connaît également, par le document US-A- 4.389.051, une garniture d'étanchéité du même type, dans laquelle on a recours à des moyens distincts pour assurer l'entraînement en rotation de la bague mobile à partir de l'arbre et 1 ' écartement axial élastique de la bague mobile et de la douille mobile fixée sur l'arbre.Document US-A-4,389,051 also discloses a seal of the same type, in which separate means are used to drive the movable ring in rotation from the shaft. and one resilient axial spacing of the movable ring and the movable sleeve fixed on the shaft.
L'invention a pour but de perfectionner et de simplifier ces garnitures sans nuire pour autant à leurs caractéristiques fonctionnelles.The object of the invention is to improve and simplify these fittings without harming their functional characteristics.
A cet effet, la garniture selon l'invention est caractérisée en ce que les moyens élastiques comportent : une rondelle radiale ; des moyens de liaison, au moins dans une relation d'entraînement en rotation, entre la rondelle et l'une, première, desdites bague et douille mobiles ; et des branches axiales, portées par la rondelle radiale, formant des ondulations dans le sens axial et agencées pour coopérer par leur extrémité libre avec l'autre, seconde, desdites bague et douille mobiles au moins dans une relation d'entraînement en rotation.To this end, the gasket according to the invention is characterized in that the elastic means comprise: a radial washer; connecting means, at least in a rotational drive relationship, between the washer and one, first, of said movable ring and sleeve; and axial branches, carried by the radial washer, forming corrugations in the axial direction and arranged to cooperate by their free end with the other, second, of said ring and bush movable at least in a rotational drive relationship.
De préférence, la rondelle radiale et les branches axiales sont en métal en feuille, notamment en acier inxoydable, usiné par exemple par électro-érosion par fil ou à la presse.Preferably, the radial washer and the axial branches are made of sheet metal, in particular stainless steel, machined for example by wire EDM or press.
Suivant un mode de réalisation préféré, les moyens élastiques comportent au moins deux branches régulièrement réparties, et de préférence trois branches à 120°.
Par exemple, les branches partent du contour de la rondelle, de préférence du contour extérieur de celle-ci.According to a preferred embodiment, the elastic means comprise at least two regularly distributed branches, and preferably three branches at 120 °. For example, the branches start from the contour of the washer, preferably from the outer contour of the latter.
Pour recevoir les extrémités libres desdites branches, ladite seconde desdites bague et douille mobiles présente par exemple une gorge annulaire sur sa face radiale tournée vers ladite première desdites bague et douille mobiles. La gorge présente avantageusement un epaulement ou rebord de retenue axiale de l'extrémité libre des branches repliée vers l'arrière.To receive the free ends of said branches, said second of said movable ring and bush has for example an annular groove on its radial face turned towards said first of said movable bush and bush. The groove advantageously has a shoulder or axial retaining rim of the free end of the branches folded back.
Dans cette réalisation, la douille mobile est solidarisée de l'arbre tournant par au moins une vis qui interfère avec ladite gorge pour coopérer avec 1 • extrémité libre de l'une au moins des branches dans une relation d'entraînement en rotation.In this embodiment, the movable sleeve is secured to the rotating shaft by at least one screw which interferes with said groove to cooperate with the free end of at least one of the branches in a rotational drive relationship.
Suivant un premier mode de réalisation desdits moyens de liaison, ceux-ci sont constitués par une seconde série de branches, plus courtes que les précédentes, de préférence alternées avec celles-ci, et coopérant avec des encoches axiales ménagées à la périphérie de ladite première desdites bague et douille mobiles ; les branches de cette seconde série présentent avantageusement une extrémité libre qui est repliée pour la retenue axiale entre les moyens élastiques et ladite première desdites bague et douille mobiles.According to a first embodiment of said connecting means, these consist of a second series of branches, shorter than the previous ones, preferably alternated with these, and cooperating with axial notches formed at the periphery of said first said movable ring and socket; the branches of this second series advantageously have a free end which is folded for the axial retention between the elastic means and said first of said movable ring and bush.
Suivant un second mode de réalisation desdits moyens de liaison, ladite première desdites bague et douille mobiles présente, sur sa face de coopération avec les moyens élastiques, des encoches radiales pour la réception des pieds desdites branches axiales formant des ondulations. Avantageusement, dans cette réalisation, la rondelle radiale comporte, dans son plan et sur sa périphérie extérieure, des saillies de retenue axiale agencées pour venir se loger derrière un epaulement de ladite première desdites bague et douille mobiles. Avantageusement, pour éviter un jeu axial
entre les moyens élastiques et la bague ou douille mobile qui les reçoit, le fond desdites encoches radiales et la face de retenue dudit epaulement sont axialement espacés d'une distance sensiblement égale à l'épaisseur de la rondelle radiale.According to a second embodiment of said connecting means, said first of said movable ring and sleeve has, on its face of cooperation with the elastic means, radial notches for receiving the feet of said axial branches forming undulations. Advantageously, in this embodiment, the radial washer comprises, in its plane and on its outer periphery, axial retaining projections arranged to be housed behind a shoulder of said first of said movable ring and sleeve. Advantageously, to avoid axial play between the elastic means and the movable ring or bushing which receives them, the bottom of said radial notches and the retaining face of said shoulder are axially spaced apart by a distance substantially equal to the thickness of the radial washer.
La rondelle radiale et les branches axiales peuvent être constituées soit par une pièce unique, soit par des pièces séparées rendues solidaires.The radial washer and the axial branches can be constituted either by a single piece, or by separate pieces made integral.
Suivant un mode de réalisation préféré, la rondelle radiale coopère avec la bague mobile, tandis que les extrémités libres des branches axiales coopèrent avec la douille mobile.According to a preferred embodiment, the radial washer cooperates with the movable ring, while the free ends of the axial branches cooperate with the movable sleeve.
Dans une réalisation particulière, un joint annulaire d'étanchéité est disposé entre la bague fixe et le support traversé par l'arbre, et un joint annulaire d'étanchéité est disposé entre la bague mobile et l'arbre, de sorte qu'on se dispense de moyens d'étanchéité au niveau de la douille mobile ou de l'extrémité des moyens élastiques coopérant avec celle-ci. Au surplus, le liquide de fonctionnement entoure la bague mobile, sauf dans la zone de la bague fixe et de l'arbre, ce qui permet un refroidissement et éventuellement une lubrification de la bague mobile.In a particular embodiment, an annular seal is placed between the fixed ring and the support through which the shaft passes, and an annular seal is placed between the movable ring and the shaft, so that exemption from sealing means at the movable sleeve or at the end of the elastic means cooperating with the latter. In addition, the operating liquid surrounds the mobile ring, except in the area of the fixed ring and the shaft, which allows cooling and possibly lubrication of the mobile ring.
On comprendra bien 1 * invention à la lecture du complément de description qui va suivre et en référence aux dessins annexés qui font partie de la description et dans lesquels :The invention will be clearly understood on reading the additional description which follows and with reference to the appended drawings which form part of the description and in which:
Fig. 1 est une coupe axiale, prise suivant la ligne I-I de la Fig. 2, d'une garniture mécanique d'étanchéité établie selon un premier mode de réalisation de l'invention ;Fig. 1 is an axial section, taken along the line I-I of FIG. 2, a mechanical seal established according to a first embodiment of the invention;
Fig. 1A et 1B montrent, à plus grande échelle, deux détails de la Fig. 1 ;
Fig. 2 est une vue en coupe transversale de la garniture de la Fig. 1, prise suivant la ligne brisée II-II de cette Figure ;Fig. 1A and 1B show, on a larger scale, two details of FIG. 1; Fig. 2 is a cross-sectional view of the packing of FIG. 1, taken along the broken line II-II of this Figure;
Fig. 3 est une vue axiale d'une pièce unique formant ressort et moyen d'entraînement en rotation, cette pièce étant considérée à plat avant sa conformation ;Fig. 3 is an axial view of a single piece forming a spring and means for driving in rotation, this piece being considered flat before its conformation;
Fig. 4 montre, à plus grande échelle, un autre détail de la Fig. 1 ;Fig. 4 shows, on a larger scale, another detail of FIG. 1;
Fig. 5 est une vue axiale de la bague mobile d'étanchéité d'une garniture mécanique d'étanchéité établie selon un deuxième mode de réalisation de l'invention ;Fig. 5 is an axial view of the movable sealing ring of a mechanical sealing gasket established according to a second embodiment of the invention;
Fig. 6 est une coupe axiale éclatée montrant, d'une part, la bague mobile de la Fig. 5, dans le plan de coupe VI-VI et, d'autre part, une pièce unique formant également ressort et moyen d'entraînement en rotation ;Fig. 6 is an exploded axial section showing, on the one hand, the movable ring of FIG. 5, in the cutting plane VI-VI and, on the other hand, a single piece also forming a spring and means for driving in rotation;
Fig. 7 est une vue axiale de la pièce unique utilisée avec la bague mobile des Figs. 5 et 6, cette pièce unique étant considérée à plat avant sa conformation ;Fig. 7 is an axial view of the single part used with the movable ring of FIGS. 5 and 6, this single piece being considered flat before its conformation;
Fig. 8 est une vue analogue aux Figs. 3 et 7 , relativement à un troisième mode de réalisation des moyens élastiques ;Fig. 8 is a view similar to FIGS. 3 and 7, relative to a third embodiment of the elastic means;
Fig. 9 montre, en coupe suivant la ligne IX-IX de la Fig. 8, la structure de la rondelle radiale de la Fig. 8 ;Fig. 9 shows, in section along the line IX-IX of FIG. 8, the structure of the radial washer of FIG. 8;
Fig. 10 est une vue en plan d'une branche axiale de la Fig. 8, avant sa fixation sur la rondelle radiale et avant son pliage ; et
Fig. 11 montre, en coupe suivant la ligne XI-XI de la Fig. 10, un détail de la bande axiale.Fig. 10 is a plan view of an axial branch of FIG. 8, before it is fixed to the radial washer and before it is folded; and Fig. 11 shows, in section along the line XI-XI of FIG. 10, a detail of the axial strip.
On a représenté sur les Figs. 1, 1A, 1B et 2 un arbre tournant 1 qui traverse un support fixe 2. L'espace 3 intérieur au support 2 renferme un fluide, par exemple de lubrification ou de fonctionnement, et la garniture est destinée à assurer l'étanchéité au passage de l'arbre 1 à travers le support 2.There is shown in Figs. 1, 1A, 1B and 2 a rotating shaft 1 which passes through a fixed support 2. The space 3 inside the support 2 contains a fluid, for example of lubrication or of operation, and the lining is intended to seal the passage from shaft 1 through support 2.
La garniture mécanique d'étanchéité comporte, de façon connue, une bague fixe 4, en relation d'étanchéité avec le support 2 par un joint annulaire 5 disposé entre la bague fixe et le support, une bague d'étanchéité mobile 6, tournant avec l'arbre 1 et en contact facial d'étanchéité avec la bague fixe, par coopération en 7 des faces radiales planes de la bague fixe et de la bague mobile, une douille mobile 8, solidaire de l'arbre 1 et distante axialement de la bague mobile 6, et des moyens élastiques 9 qui coopèrent avec la bague mobile 6 et la douille 8 et qui sont agencés, d'une part, pour solliciter élastiquement dans le sens axial la bague mobile contre la bague fixe et, d'autre part, pour transmettre à la bague mobile le mouvement de rotation de l'arbre 1 et de la douille 8.The mechanical seal has, in known manner, a fixed ring 4, in sealing relation with the support 2 by an annular seal 5 disposed between the fixed ring and the support, a movable seal ring 6, rotating with the shaft 1 and in facial sealing contact with the fixed ring, by cooperation at 7 of the planar radial faces of the fixed ring and of the movable ring, a movable bush 8, integral with the shaft 1 and axially distant from the movable ring 6, and elastic means 9 which cooperate with the movable ring 6 and the sleeve 8 and which are arranged, on the one hand, to elastically urge the movable ring in the axial direction against the fixed ring and, on the other hand , to transmit to the movable ring the rotational movement of the shaft 1 and of the sleeve 8.
L'arbre 1 traverse le support 2, la bague fixe 4 et la bague mobile 6 avec un jeu radial fonctionnel, et un joint annulaire d'étanchéité 10 est disposé entre la bague mobile 6 et l'arbre 1. Ce joint est par exemple placé dans une gorge, ce qui permet de dégager la face radiale de la bague mobile 6 pour sa coopération avec les moyens élastiques 9.The shaft 1 passes through the support 2, the fixed ring 4 and the movable ring 6 with a functional radial clearance, and an annular seal 10 is placed between the movable ring 6 and the shaft 1. This seal is for example placed in a groove, which allows the radial face of the movable ring 6 to be released for its cooperation with the elastic means 9.
L'étanchéité est ainsi assurée, au passage de l'arbre 1 à travers le support 2, par le joint 5, la bague fixe 4, la coopération en 7 de la bague fixe et de la bague mobile, la bague mobile elle-même et le joint 10.
Selon un premier type de réalisation, les moyens élastiques 9 sont constitués par une pièce unique et sont en métal en feuille, par exemple en acier inoxydable découpé par électro-érosion par fil, ce qui évite les amorces de fissuration. En variante, cette pièce unique pourrait être travaillée à la presse. On a représenté sur les Figs. 3 et 7, suivant deux réalisations, la pièce unique 9 telle qu'elle est obtenue après le découpage, c'est-à-dire à plat et avant sa conformation finale.Sealing is thus ensured, when the shaft 1 passes through the support 2, by the seal 5, the fixed ring 4, the cooperation at 7 of the fixed ring and of the mobile ring, the mobile ring itself and seal 10. According to a first type of embodiment, the elastic means 9 consist of a single piece and are made of sheet metal, for example of stainless steel cut by wire EDM, which avoids crack initiation. Alternatively, this unique piece could be worked with the press. There is shown in Figs. 3 and 7, according to two embodiments, the single piece 9 as obtained after cutting, that is to say flat and before its final conformation.
Dans la réalisation des Figs. 1-4, la pièce uniqueIn the embodiment of Figs. 1-4, the unique piece
9 comporte une rondelle radiale circulaire 11 et deux séries de branches radiales 12,13 qui, après conformation par pliage, s'étendent dans la direction axiale générale de l'arbre 1. La rondelle radiale 11 est destinée à venir en contact facial avec la bague mobile 6 ou la douille mobile 8 ; dans le mode de réalisation adopté, la rondelle 11 est en contact avec la bague mobile 6. En variante, la rondelle il pourrait s'appuyer contre le joint 10 en saillie axiale par rapport à la bague 6. Les branches 12 sont courtes et sont destinées, après un premier pliage à 90°, à venir coopérer avec des encoches axiales 14 ménagées à la périphérie de la bague mobile 6 et, après un second pliage à 90° à leur extrémité libre, à coopérer avec la face radiale opposée de la bague 6 pour assurer une retenue axiale et un centrage entre la pièce unique 9 et la bague 6 (Fig. 1B) . Les branches 13 sont beaucoup plus longues que les branches 12 et sont destinées, après pliage à 90° par rapport à la rondelle 11, et dans le sens axial opposé à celui du premier pliage des branches 12, à former des ondulations 15 dans le sens axial, leurs extrémités 16, qui se terminent de préférence par un doigt rétréci 17 , étant reçues dans une gorge annulaire 18 ménagée sur la face radiale de la douille 8 qui est tournée vers la bague mobile 6. Comme montré au mieux sur la Fig. 4, la gorge 18 présente, près de sa sortie sur la face radiale de la douille 8, un epaulement ou rebord 19 de retenue axiale du doigt 17 replié vers l'arrière et radialement vers l'extérieur, sensiblement à 45° par rapport à 1 ' axe de 1 ' arbre 1.
Dans le mode de réalisation adopté, les branches 12,13 partent du contour extérieur de la rondelle 11 et, par conséquent, les encoches 14 sont ménagées sur la périphérie extérieure de la bague mobile 6.9 comprises a circular radial washer 11 and two series of radial branches 12, 13 which, after shaping by folding, extend in the general axial direction of the shaft 1. The radial washer 11 is intended to come into facial contact with the movable ring 6 or the movable sleeve 8; in the adopted embodiment, the washer 11 is in contact with the movable ring 6. As a variant, the washer it could rest against the seal 10 projecting axially relative to the ring 6. The branches 12 are short and are intended, after a first 90 ° folding, to cooperate with axial notches 14 formed at the periphery of the movable ring 6 and, after a second 90 ° folding at their free end, to cooperate with the opposite radial face of the ring 6 to ensure axial retention and centering between the single part 9 and the ring 6 (Fig. 1B). The branches 13 are much longer than the branches 12 and are intended, after folding at 90 ° relative to the washer 11, and in the axial direction opposite to that of the first folding of the branches 12, to form corrugations 15 in the direction axial, their ends 16, which preferably end with a narrowed finger 17, being received in an annular groove 18 formed on the radial face of the sleeve 8 which is turned towards the movable ring 6. As best shown in FIG. 4, the groove 18 has, near its outlet on the radial face of the sleeve 8, a shoulder or rim 19 for axial retention of the finger 17 folded back and radially outwards, substantially at 45 ° with respect to 1 axis of 1 shaft 1. In the adopted embodiment, the branches 12, 13 start from the external contour of the washer 11 and, consequently, the notches 14 are formed on the external periphery of the movable ring 6.
Les branches 12 et 13 des deux séries sont alternées, de préférence régulièrement, et chaque série comporte au moins deux branches régulièrement réparties, et de préférence trois branches à 120°, comme représenté sur les dessins.The branches 12 and 13 of the two series are alternated, preferably regularly, and each series comprises at least two regularly distributed branches, and preferably three branches at 120 °, as shown in the drawings.
Du fait que la rondelle 11 est en contact facial avec la bague mobile 6, les branches 12 sont logées pratiquement totalement dans les encoches 14.Because the washer 11 is in facial contact with the movable ring 6, the branches 12 are housed almost completely in the notches 14.
Pour plus de clarté, sur les Figs. 1A et 1B, la rondelle 11 et les branches courtes 12 ont été représentées à distance de la bague mobile 6 alors que, en réalité, elles sont en contact avec celle-ci.For clarity, in Figs. 1A and 1B, the washer 11 and the short branches 12 have been shown at a distance from the movable ring 6 when, in reality, they are in contact with the latter.
La douille 8 est immobilisée sur l'arbre 1 par au moins une vis radiale 20 qui, de préférence, interfère avec la gorge 18 de manière à constituer une butée en rotation pour les extrémités 16 des branches 13 et à transmettre ainsi à la pièce 9 le mouvement de rotation de 1 ' arbre 1. On prévoit en général deux vis 20, à 120°, pour deux des branches 13, mais on peut également prévoir une troisième vis 20 pour l'autre branche 13.The sleeve 8 is immobilized on the shaft 1 by at least one radial screw 20 which, preferably, interferes with the groove 18 so as to constitute a stop in rotation for the ends 16 of the branches 13 and thus to transmit to the part 9 the rotational movement of the shaft 1. In general, two screws 20 are provided at 120 ° for two of the branches 13, but a third screw 20 can also be provided for the other branch 13.
En fonctionnement, la pièce unique 9, par ses ondulations 15, sollicite axialement la bague mobile 6 contre la bague fixe 4, en lui permettant de flotter légèrement dans le sens radial et en l'entraînant en rotation par les branches 12 et 13 , à partir de l'arbre 1 et de la douille 8.In operation, the single part 9, by its corrugations 15, biases the movable ring 6 axially against the fixed ring 4, allowing it to float slightly in the radial direction and driving it in rotation by the branches 12 and 13, to from shaft 1 and bush 8.
Le mode de réalisation représenté sur les Figs. 5 àThe embodiment shown in Figs. 5 to
7 ne diffère de celui des Figs. 1 à 4 que par les moyens de
coopération entre la pièce unique 9 et la bague mobile 6. On ne répétera donc pas la description de la coopération des branches axiales 13 avec la douille mobile 8, cette dernière n'étant d'ailleurs pas représentée sur les Figs. 5 et 6.7 does not differ from that of FIGS. 1 to 4 only by means of cooperation between the single part 9 and the movable ring 6. We will therefore not repeat the description of the cooperation of the axial branches 13 with the movable sleeve 8, the latter not being shown in FIGS. 5 and 6.
Dans ce deuxième mode de réalisation, les moyens de liaison en rotation entre la pièce unique 9 et la bague mobile 6 sont constitués par les pieds 21 des branches axiales 13 elles-mêmes. Ces pieds sont la partie de liaison des branches 13 avec la rondelle radiale 11.In this second embodiment, the rotational connection means between the single part 9 and the movable ring 6 are constituted by the feet 21 of the axial branches 13 themselves. These feet are the connecting part of the branches 13 with the radial washer 11.
Pour coopérer avec les pieds 21, la bague mobile 6 présente, sur sa face de coopération avec la pièce unique, des encoches radiales 22, de même largeur que les branches 13. Du fait que les pieds 21 des branches 13 sont logés dans les encoches 22, on réalise ainsi l'entraînement en rotation de la bague mobile 6 par la pièce unique 9 par les branches 13 elles-mêmes sans qu'il soit nécessaire, comme dans le mode de réalisation des Figs. 1 à 4, de prévoir des branches supplémentaires .To cooperate with the feet 21, the movable ring 6 has, on its face for cooperating with the single piece, radial notches 22, of the same width as the branches 13. Because the feet 21 of the branches 13 are housed in the notches 22, the rotational drive of the movable ring 6 is thus carried out by the single piece 9 by the branches 13 themselves without it being necessary, as in the embodiment of FIGS. 1 to 4, to provide additional branches.
De préférence, dans ce deuxième mode de réalisation de l'invention, on prévoit également des moyens pour assurer la retenue axiale entre la bague mobile 6 et la pièce uniquePreferably, in this second embodiment of the invention, means are also provided for ensuring the axial retention between the movable ring 6 and the single part
9. Pour cela, la bague mobile 6 présente, du côté de la pièce unique 9, un rebord 23 en saillie radiale vers l'intérieur qui définit, dans la bague 6, un epaulement radial intérieur 24 destiné à coopérer avec des saillies 25 qui sont prévues dans le plan de la rondelle 11 et sur la périphérie extérieure de celle-ci, de chaque côté des pieds 21. Le rebord 23 présente un diamètre intérieur légèrement inférieur au diamètre extérieur des saillies 25, celles-ci venant se loger derrière le rebord 23, contre l' epaulement 24, par déformation élastique.9. For this, the movable ring 6 has, on the side of the single part 9, a rim 23 projecting radially inwards which defines, in the ring 6, an internal radial shoulder 24 intended to cooperate with projections 25 which are provided in the plane of the washer 11 and on the outer periphery thereof, on each side of the legs 21. The flange 23 has an inner diameter slightly smaller than the outer diameter of the projections 25, these coming to be housed behind the rim 23, against the shoulder 24, by elastic deformation.
De préférence, le fond des encoches radiales 22 et la face de retenue de l' epaulement 24 sont axialement espacés d'une distance sensiblement égale à l'épaisseur de la
rondelle 11 pour que celle-ci soit reçue sans jeu et ne flotte donc pas.Preferably, the bottom of the radial notches 22 and the retaining face of the shoulder 24 are axially spaced by a distance substantially equal to the thickness of the washer 11 so that it is received without play and therefore does not float.
Dans ce mode de réalisation, la rondelle 11 n'est pas en contact facial avec la bague mobile 6. Elle est radialement en retrait par rapport aux encoches 22 qui reçoivent les pieds 21 des branches axiales 13. Ce sont donc les pieds 21 qui communiquent à la bague mobile 6 à la fois les forces de sollicitation axiale contre la bague fixe 4 et les forces d'entraînement en rotation.In this embodiment, the washer 11 is not in facial contact with the movable ring 6. It is radially set back relative to the notches 22 which receive the feet 21 of the axial branches 13. It is therefore the feet 21 which communicate to the movable ring 6 both the axial biasing forces against the fixed ring 4 and the rotational driving forces.
On a représenté sur les Figs. 8-11 un troisième mode de réalisation des moyens élastiques 9.There is shown in Figs. 8-11 a third embodiment of the elastic means 9.
Par analogie avec ce qui précède, on a adopté sur ces Figures les mêmes références numériques que sur les Figs.By analogy with the above, the same reference numerals have been adopted in these Figures as in Figs.
I à 7 pour des éléments identiques, similaires ou équivalents.I to 7 for identical, similar or equivalent elements.
Ce mode de réalisation se distingue des précédents essentiellement par le fait que les moyens élastiques 9 ne sont pas constitués par une pièce unique, mais par des pièces séparées qui sont solidarisées entre elles.This embodiment differs from the previous ones essentially by the fact that the elastic means 9 are not constituted by a single piece, but by separate pieces which are joined together.
La rondelle radiale 11 est par exemple constituée par la superposition et l'assemblage de deux rondelles élémentaires identiques (Fig. 9) . Par ailleurs, la rondelleThe radial washer 11 is for example constituted by the superposition and the assembly of two identical elementary washers (Fig. 9). Furthermore, the washer
II peut être fendue, comme montré en 26.It can be split, as shown in 26.
A leur extrémité libre 16 de coopération avec la douille mobile (non représentée) , les branches axiales 13 comportent, comme précédemment, un doigt rétréci 17 qui se termine par des dents 27 favorisant la retenue axiale des branches dans la gorge 18 (Fig. 1) .At their free end 16 of cooperation with the movable sleeve (not shown), the axial branches 13 comprise, as previously, a narrowed finger 17 which ends in teeth 27 favoring the axial retention of the branches in the groove 18 (Fig. 1 ).
A leur autre extrémité de liaison avec la rondelle 11, les branches 13 comportent un doigt rétréci 28
d'assemblage destiné à être replié à 180° pour venir emprisonner la rondelle 11 dans le U ainsi formé en chevauchant son chant intérieur. A distance du doigt 28, chaque branche 13 porte une butée 29, par exemple un crevé d'emboutissage, destinée à coopérer avec le chant extérieur de la rondelle 11. Celle-ci est ainsi emprisonnée entre le doigt 28 et la butée 29.At their other end of connection with the washer 11, the branches 13 have a narrowed finger 28 assembly intended to be folded at 180 ° to trap the washer 11 in the U thus formed by overlapping its inner edge. At a distance from the finger 28, each branch 13 carries a stop 29, for example a stamping puncture, intended to cooperate with the outside edge of the washer 11. The latter is thus trapped between the finger 28 and the stop 29.
Les doigts rétrécis 17 coopèrent avec la douille mobile 8 comme décrit en référence aux Figs. 1 à 4.The narrowed fingers 17 cooperate with the movable sleeve 8 as described with reference to Figs. 1 to 4.
Pour la coopération de l'ensemble rondelle 11 - branches 13 avec la bague mobile 6, cette dernière est similaire à celle des Figs. 5 et 6, c'est-à-dire qu'elle comporte des encoches radiales 22 pour la réception des pieds 21 des branches 13 et que la rondelle 11 est radialement en retrait par rapport aux encoches 22, sans contact facial avec la bague mobile 6. Comme dans le mode de réalisation des Figs. 5 à 7, la rondelle 11 ne sert donc qu'à relier les branches 13.For the cooperation of the washer 11 - branches 13 assembly with the movable ring 6, the latter is similar to that of FIGS. 5 and 6, that is to say that it has radial notches 22 for the reception of the feet 21 of the branches 13 and that the washer 11 is radially set back relative to the notches 22, without facial contact with the movable ring 6. As in the embodiment of Figs. 5 to 7, the washer 11 therefore only serves to connect the branches 13.
Dans le mode de réalisation, il n'y a pas de retenue axiale entre la bague mobile 6 et l'ensemble 11, 13. Toutefois, pour obtenir une telle retenue axiale, les pieds 21 des branches 13 pourraient comporter des saillies, telles que les saillies 25 de la Fig. 7, venant se loger élastiquement derrière un epaulement de la bague mobile 6.In the embodiment, there is no axial retention between the movable ring 6 and the assembly 11, 13. However, to obtain such an axial retention, the feet 21 of the branches 13 could have projections, such as the projections 25 of FIG. 7, which is housed elastically behind a shoulder of the movable ring 6.
II ressort de ce qui précède que la garniture mécanique d'étanchéité selon l'invention présente de nombreux avantages, en raison principalement de sa simplicité, et notamment les suivants : les tolérances de fabrication sont très larges pour tous les composants, sans que l'efficacité de la garniture en soit affectée ; la douille 8 n'ayant aucun rôle direct d'étanchéité, elle peut être obtenue par simple tournage ; la garniture est de préférence monobloc, ce qui évite les risques de casse et de libération lors du montage ; la garniture fonctionne pour les deux sens de rotation de
l'arbre 1, du fait que, après un éventuel mouvement à vide, les branches 13 viennent buter contre une autre vis 20 ; les branches élastiques 13 permettent un débattement axial de la bague mobile sans aucun risque de coincement ; du fait que la bague mobile 6 est presque entièrement entourée par le fluide, son refroidissement et éventuellement sa lubrification sont assurés, notamment au niveau de la zone de coopération 7 avec la bague fixe 4 ; la garniture est totalement ouverte, ce qui élimine le risque de blocage par le fluide ; et la bague mobile 6, du fait qu'elle peut flotter radialement, ne présente pas nécessairement un axe de symétrie.It follows from the above that the mechanical seal according to the invention has many advantages, mainly due to its simplicity, and in particular the following: the manufacturing tolerances are very wide for all the components, without the the effectiveness of the packing is affected; the sleeve 8 having no direct sealing role, it can be obtained by simple turning; the lining is preferably in one piece, which avoids the risk of breakage and release during assembly; the packing works for both directions of rotation of the shaft 1, due to the fact that, after a possible vacuum movement, the branches 13 abut against another screw 20; the elastic arms 13 allow axial movement of the movable ring without any risk of jamming; the fact that the movable ring 6 is almost entirely surrounded by the fluid, its cooling and possibly its lubrication are ensured, in particular at the level of the zone of cooperation 7 with the fixed ring 4; the packing is completely open, which eliminates the risk of blockage by the fluid; and the movable ring 6, because it can float radially, does not necessarily have an axis of symmetry.
Bien entendu, l'invention n'est pas limitée aux modes de réalisation qui ont été décrits ; on pourrait au contraire concevoir diverses variantes sans sortir pour autant de son cadre.
Of course, the invention is not limited to the embodiments which have been described; on the contrary, we could conceive of various variants without going beyond its scope.
Claims
1. Garniture mécanique d ' étanchéité pour un arbre tournant (1), comportant une bague d'étanchéité fixe (4), en relation d'étanchéité avec un support (2) traversé par l'arbre (1), une bague d'étanchéité mobile (6) tournant avec l'arbre (1) et en contact facial (7) d'étanchéité avec la bague fixe (4), une douille mobile (8), solidaire de l'arbre et distante axialement de la bague d'étanchéité mobile, et des moyens élastiques (9) qui coopèrent avec la bague mobile (4) et la douille mobile (8) et qui sont agencés, d'une part, pour solliciter élastiquement dans le sens axial la bague mobile contre la bague fixe et, d'autre part, pour transmettre à la bague mobile le mouvement de rotation de l'arbre et de la douille mobile, caractérisée en ce que les moyens élastiques (9) comportent : une rondelle radiale (11) ; des moyens (12,21) de liaison, au moins dans une relation d'entraînement en rotation, entre la rondelle et l'une, première, desdites bague et douille mobiles; et des branches axiales (13) , portées par la rondelle radiale, formant des ondulations (15) dans le sens axial et agencées pour coopérer par leur extrémité libre (16,17) avec l'autre, seconde, desdites bague et douille mobiles au moins dans une relation d'entraînement en rotation.1. Mechanical seal for a rotating shaft (1), comprising a fixed sealing ring (4), in sealing relation with a support (2) through which the shaft (1) passes, a ring mobile seal (6) rotating with the shaft (1) and in facial contact (7) sealing with the fixed ring (4), a movable bush (8), integral with the shaft and axially distant from the ring d mobile seal, and elastic means (9) which cooperate with the movable ring (4) and the movable bush (8) and which are arranged, on the one hand, to elastically bias the movable ring against the ring in the axial direction fixed and, on the other hand, for transmitting to the movable ring the rotational movement of the shaft and of the movable bushing, characterized in that the elastic means (9) comprise: a radial washer (11); connecting means (12, 21), at least in a rotational drive relationship, between the washer and one, first, of said movable ring and bush; and axial branches (13), carried by the radial washer, forming corrugations (15) in the axial direction and arranged to cooperate by their free end (16,17) with the other, second, of said ring and sleeve movable at less in a rotational drive relationship.
2. Garniture selon la revendication 1, caractérisée en ce que la rondelle radiale (11) et les branches axiales2. A fitting according to claim 1, characterized in that the radial washer (11) and the axial branches
(13) sont en métal, en feuille, notamment en acier inoxydable découpé, par électro-érosion par fil ou travaillé à la presse.(13) are made of metal, of sheet, in particular of cut stainless steel, by wire EDM or worked in the press.
3. Garniture selon l'une des revendications 1 et 2, caractérisée en ce que les extrémités libres desdites branches (13) et/ou lesdits moyens de liaison (12,21) sont agencés pour assurer également une retenue axiale entre les moyens élastiques (9) et la douille mobile (8) et/ou la bague mobile (6) .
3. A fitting according to one of claims 1 and 2, characterized in that the free ends of said branches (13) and / or said connecting means (12,21) are arranged to also ensure an axial retention between the elastic means ( 9) and the movable sleeve (8) and / or the movable ring (6).
4. Garniture selon l'une des revendications 1 à 3, caractérisée en ce que les moyens élastiques comportent au moins deux branches axiales régulièrement réparties, et de préférence trois branches à 120°.4. Trim according to one of claims 1 to 3, characterized in that the elastic means comprise at least two axial branches regularly distributed, and preferably three branches at 120 °.
5. Garniture selon l'une des revendications 1 à 4, caractérisée en ce que les branches axiales partent du contour de la rondelle (11) , de préférence du contour extérieur de celle-ci.5. A fitting according to one of claims 1 to 4, characterized in that the axial branches depart from the contour of the washer (11), preferably from the outer contour thereof.
6. Garniture selon l'une des revendications 1 à 5, caractérisée en ce que, pour recevoir les extrémités libres desdites branches, ladite seconde desdites bague et douille mobiles présente une gorge annulaire (18) sur sa face radiale tournée vers l'autre desdites bague et douille mobiles.6. A fitting according to one of claims 1 to 5, characterized in that, to receive the free ends of said branches, said second of said movable ring and sleeve has an annular groove (18) on its radial face facing the other of said movable ring and sleeve.
7. Garniture selon la revendication 6, caractérisée en ce que la gorge (18) présente un epaulement ou rebord (19) de retenue axiale de l'extrémité libre (17) desdites branches repliée vers l'arrière.7. A fitting according to claim 6, characterized in that the groove (18) has a shoulder or flange (19) for retaining the free end (17) of said branches folded backwards.
8. Garniture selon l'une des revendications 6 et 7, caractérisée en ce que la douille mobile (8) est solidarisée de l'arbre (1) par au moins une vis (20) qui interfère avec la gorge (18) pour coopérer avec l'extrémité libre (16,17) de l'une au moins desdites branches (13) dans une relation d'entraînement en rotation.8. A fitting according to one of claims 6 and 7, characterized in that the movable sleeve (8) is secured to the shaft (1) by at least one screw (20) which interferes with the groove (18) to cooperate with the free end (16,17) of at least one of said branches (13) in a rotational drive relationship.
9. Garniture selon l'une des revendications 1 à 8, caractérisée en ce que lesdits moyens de liaison sont constitués par une seconde série de branches (12) , plus courtes, de préférence alternées avec lesdites branches (13) , et coopérant avec des encoches axiales (14) ménagées à la périphérie de ladite première desdites bague et douille mobiles.
9. A fitting according to one of claims 1 to 8, characterized in that said connecting means consist of a second series of branches (12), shorter, preferably alternating with said branches (13), and cooperating with axial notches (14) formed at the periphery of said first of said movable ring and bush.
10. Garniture selon la revendication 9, caractérisée en ce que les branches (12) de la seconde série présentent une extrémité libre repliée pour la retenue axiale entre les moyens élastiques et ladite première desdites bague et douille mobiles.10. A fitting according to claim 9, characterized in that the branches (12) of the second series have a folded free end for the axial retention between the elastic means and said first of said movable ring and bush.
11. Garniture selon l'une des revendications 1 à 8, caractérisée en ce que ladite première desdites bague et douille mobiles présente, sur sa face de coopération avec les moyens élastiques, des encoches radiales (22) de réception des pieds (21) desdites branches (13) .11. A fitting according to one of claims 1 to 8, characterized in that said first of said movable ring and sleeve has, on its face of cooperation with the elastic means, radial notches (22) for receiving the feet (21) of said branches (13).
12. Garniture selon la revendication 11, caractérisée en ce que la rondelle radiale (11) comporte, dans son plan et sur sa périphérie extérieure, des saillies (25) de retenue axiale agencées pour se loger derrière un epaulement radial (24) de ladite première desdites bague et douille mobiles.12. A fitting according to claim 11, characterized in that the radial washer (11) comprises, in its plane and on its outer periphery, projections (25) of axial retention arranged to be housed behind a radial shoulder (24) of said first of said mobile ring and sleeve.
13. Garniture selon la revendication 12 , caractérisée en ce que le fond desdites encoches radiales (22) et la face de retenue dudit epaulement (24) sont axialement espacés d'une distance sensiblement égale à l'épaisseur de la rondelle radiale (11).13. A fitting according to claim 12, characterized in that the bottom of said radial notches (22) and the retaining face of said shoulder (24) are axially spaced by a distance substantially equal to the thickness of the radial washer (11) .
14. Garniture selon l'une des revendications 1 à 13, caractérisée en ce que les moyens élastiques (9) sont en une seule pièce.14. Fitting according to one of claims 1 to 13, characterized in that the elastic means (9) are in one piece.
15. Garniture selon l'une des revendications 1 à15. Trim according to one of claims 1 to
13, caractérisée en ce que les moyens élastiques (9) sont constitués par des pièces distinctes et assemblées.13, characterized in that the elastic means (9) consist of separate and assembled parts.
16. Garniture selon la revendication 15, caractérisée en ce que les branches axiales (13) comportent à une extrémité des moyens (28, 29) de fixation sur la rondelle (11).
16. A fitting according to claim 15, characterized in that the axial branches (13) comprise at one end means (28, 29) for fixing on the washer (11).
17. Garniture selon la revendication 16, caractérisé en ce que lesdits moyens de fixation sont constitués par un doigt (28) replié en U et enserrant la rondelle (11) et par une butée (29) coopérant avec un chant de la rondelle.17. A fitting according to claim 16, characterized in that said fixing means consist of a finger (28) folded in a U and enclosing the washer (11) and by a stop (29) cooperating with a song of the washer.
18. Garniture selon l'une des revendications 1 à18. Trim according to one of claims 1 to
17, caractérisée en ce que la rondelle radiale (11) coopère avec la bague mobile (6) et les extrémités libres des branches axiales (13) coopèrent avec la douille mobile (8) .17, characterized in that the radial washer (11) cooperates with the movable ring (6) and the free ends of the axial branches (13) cooperate with the movable bush (8).
19. Garniture selon l'une des revendications 1 à19. Trim according to one of claims 1 to
18, caractérisée en ce qu'un joint annulaire d'étanchéité (5) est disposé entre la bague fixe (4) et le support (2) , et un joint annulaire d'étanchéité (10) est disposé entre la bague mobile (6) et l'arbre (1) .
18, characterized in that an annular seal (5) is arranged between the fixed ring (4) and the support (2), and an annular seal (10) is arranged between the movable ring (6 ) and the tree (1).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU36325/97A AU3632597A (en) | 1997-08-11 | 1997-08-11 | Mechanical seal for rotating shaft |
PCT/IB1997/000984 WO1999008026A1 (en) | 1997-08-11 | 1997-08-11 | Mechanical seal for rotating shaft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB1997/000984 WO1999008026A1 (en) | 1997-08-11 | 1997-08-11 | Mechanical seal for rotating shaft |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999008026A1 true WO1999008026A1 (en) | 1999-02-18 |
Family
ID=11004596
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB1997/000984 WO1999008026A1 (en) | 1997-08-11 | 1997-08-11 | Mechanical seal for rotating shaft |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU3632597A (en) |
WO (1) | WO1999008026A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1503116A1 (en) * | 2003-07-29 | 2005-02-02 | Bernard Leonetti | Shaft seal |
EP1474624B1 (en) * | 2002-02-14 | 2012-02-22 | Huhnseal AB | Single seal with resilient member |
CN102506178A (en) * | 2011-10-31 | 2012-06-20 | 中国航空动力机械研究所 | Mechanical sealing part |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1144482A (en) * | 1966-04-06 | 1969-03-05 | Speedwell Res Ltd | Improvements in seals |
US4389051A (en) | 1982-07-15 | 1983-06-21 | Eg&G Sealol, Inc. | Pressed in anti-rotation lugs for mechanical face seals |
FR2594519A1 (en) | 1986-02-17 | 1987-08-21 | Leonetti Bernard | Mechanical sealing gasket for a revolving shaft and its method of manufacture |
EP0365138A1 (en) | 1988-09-16 | 1990-04-25 | Minnesota Mining And Manufacturing Company | Hydrogel implant lens reconfigured and dehydrated, rehydrated in situ |
EP0385138A1 (en) * | 1989-03-01 | 1990-09-05 | Pacific Wietz GmbH + Co. KG | Mechanical seal independent of the direction of rotation |
FR2749910A1 (en) * | 1996-06-12 | 1997-12-19 | Ropac John Crane | Mechanical packing seal for rotary shaft |
-
1997
- 1997-08-11 AU AU36325/97A patent/AU3632597A/en not_active Abandoned
- 1997-08-11 WO PCT/IB1997/000984 patent/WO1999008026A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1144482A (en) * | 1966-04-06 | 1969-03-05 | Speedwell Res Ltd | Improvements in seals |
US4389051A (en) | 1982-07-15 | 1983-06-21 | Eg&G Sealol, Inc. | Pressed in anti-rotation lugs for mechanical face seals |
FR2594519A1 (en) | 1986-02-17 | 1987-08-21 | Leonetti Bernard | Mechanical sealing gasket for a revolving shaft and its method of manufacture |
EP0365138A1 (en) | 1988-09-16 | 1990-04-25 | Minnesota Mining And Manufacturing Company | Hydrogel implant lens reconfigured and dehydrated, rehydrated in situ |
EP0385138A1 (en) * | 1989-03-01 | 1990-09-05 | Pacific Wietz GmbH + Co. KG | Mechanical seal independent of the direction of rotation |
FR2749910A1 (en) * | 1996-06-12 | 1997-12-19 | Ropac John Crane | Mechanical packing seal for rotary shaft |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1474624B1 (en) * | 2002-02-14 | 2012-02-22 | Huhnseal AB | Single seal with resilient member |
EP1503116A1 (en) * | 2003-07-29 | 2005-02-02 | Bernard Leonetti | Shaft seal |
FR2858383A1 (en) * | 2003-07-29 | 2005-02-04 | Bernard Leonetti | SEALING SHAFT FOR ROTATING SHAFT. |
CN102506178A (en) * | 2011-10-31 | 2012-06-20 | 中国航空动力机械研究所 | Mechanical sealing part |
Also Published As
Publication number | Publication date |
---|---|
AU3632597A (en) | 1999-03-01 |
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