FR2579282A1 - Improved sealing assembly for gas springs and the like - Google Patents
Improved sealing assembly for gas springs and the like Download PDFInfo
- Publication number
- FR2579282A1 FR2579282A1 FR8504246A FR8504246A FR2579282A1 FR 2579282 A1 FR2579282 A1 FR 2579282A1 FR 8504246 A FR8504246 A FR 8504246A FR 8504246 A FR8504246 A FR 8504246A FR 2579282 A1 FR2579282 A1 FR 2579282A1
- Authority
- FR
- France
- Prior art keywords
- sealing assembly
- seals
- assembly according
- cavity
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/365—Special sealings, including sealings or guides for piston-rods the sealing arrangement having a pressurised chamber separated from the damping medium
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
Description
La présente invention se rapporte à un ensemble d'étanchéité de haute fiabiiité pour ressorts à gaz et analogues. The present invention relates to a high reliability sealing assembly for gas springs and the like.
Les ressorts à gaz et en particulier les ressorts à azote sont couramment employés dans les outils de presse pour l'extraction des pièces estampées ou embouties. Gas springs and in particular nitrogen springs are commonly used in press tools for the extraction of stamped or stamped parts.
Utilisés en production de grande série, le nombre de cycles de travail de ces ressorts s' avère considérable dépassant bien souvent le mi Il ion de manoeuvreset il convient de s'assurer pour ces organes d'une parfaite fiabilité. Used in mass production, the number of working cycles of these springs turns out to be considerable, often exceeding the limit of maneuvers, and it is advisable to make sure for these bodies of perfect reliability.
La principale source de défection concerne l'étanchéité dont la garantie ne peut être assurée complètement pendant de longues périodes d'utilisation répétée. The main source of defect concerns waterproofing, the guarantee of which cannot be fully guaranteed for long periods of repeated use.
En effet, en raison des efforts séquentiels dus au cycle de travail, le joint d'étanchéité souple, dont sont pourvus les ressorts existants, se détériore et ne permet plus, non seulement d'assurer une parfaite étanchéité, mais aussi de servir de référence constante de butée à la tige en position sortie. Indeed, due to the sequential forces due to the work cycle, the flexible seal, which is provided with existing springs, deteriorates and no longer allows, not only to ensure a perfect seal, but also to serve as a reference stop constant at the rod in the extended position.
Ces défauts, lorsqu'ils s'amplifient, risquent d'endommager la presse mais aussi de fausser ou de détériorer la pièce produite. These faults, when they increase, risk damaging the press but also distorting or damaging the part produced.
L'invention a pour but de remédier à ces inconvénients en proposant un ensemble d'étanchéité de haute fiabilité garantissant un long usage et une course rigoureusement constante pour ressorts à gaz et analogues. The invention aims to remedy these drawbacks by proposing a high reliability sealing assembly guaranteeing long use and a strictly constant stroke for gas springs and the like.
Les caractéristiques techniques et d'autres avantages apparaîtront 3 la lecture de la description qui suit, effectuée à titre d'exemple non limitatif sur un mode d'exécution de l'invention en référence à la figure unique qui est une vue en coupe longitudinale de l'ensemble à double étanchéité selon l'in invention. The technical characteristics and other advantages will appear on reading the following description, given by way of nonlimiting example on an embodiment of the invention with reference to the single figure which is a view in longitudinal section of the double sealing assembly according to the invention.
Comme déjà mentionnné, la double étanchéité selon l'invention permet de garantir un long usage en totale efficacité bien au-delà du seuil critique actuel de risque de mauvais fonctionnement ou de fuite. As already mentioned, the double tightness according to the invention makes it possible to guarantee long use in total efficiency well beyond the current critical threshold of risk of malfunction or leakage.
De plus, au-delà des performances techniques, L'ensemble d'étanchéité selon l'invention met en oeuvre des composants simples ce qui permet d'envisager un prix de revient tout à fait compétitif. In addition, beyond the technical performance, the sealing assembly according to the invention uses simple components which makes it possible to envisage a completely competitive cost price.
Par ailleurs, la course du piston reste toujours identique. Furthermore, the piston stroke always remains the same.
En se référant à la vue en coupe longitudinale représentée sur le dessin, I'invention se compose de la combinaison des moyens suivants. Referring to the longitudinal section view shown in the drawing, the invention consists of the combination of the following means.
On prévoit dans l'ensemble-guide 1 de la tige motrice 2, autour de ladite tige, une chambre annulaire étanche 3 remplie d'huile par un orifice latéral 4, obturé par un bouchon à vis, la tige constituant la deuxième paroi latérale de la chambre. There is provided in the guide assembly 1 of the drive rod 2, around said rod, a sealed annular chamber 3 filled with oil by a lateral orifice 4, closed by a screw cap, the rod constituting the second lateral wall of bedroom.
L'ensemble-guide 1 comprend, de part et d'autre de cette chambre 3, des logements annulaires appropriés 5 garnis chacun d'un joint annulaire référencé 6 et 7 respectivement supérieur et inférieur. The guide assembly 1 comprises, on either side of this chamber 3, suitable annular housings 5 each furnished with an annular seal referenced 6 and 7 respectively upper and lower.
Dans une version préférée de I ' i nvent i on, les joints sont identiques, du type manchette. Les inventeurs ont remarqué que les joints de ce type, avec cavité et, plus particulièrement comprenant les lèvres 8 et 9, procurent les meilleurs résultats. In a preferred version of I nvent i on, the seals are identical, of the cuff type. The inventors have noticed that the seals of this type, with cavity and, more particularly comprising the lips 8 and 9, give the best results.
Les joints sont disposés dans le même sens, lèvres dirigées vers la chambre de compression. The joints are arranged in the same direction, lips directed towards the compression chamber.
Le joint inférieur est situé entre une bague de guidage 10 ouverte et la chambre annulaire 3. Il est immobilisé dans son logement par une bague plate 11 anti extrusion en polyamide. Le joint supérieur 6 est disposé à proximité de la paroi supérieure de la chambre 3 et son espace inter-lèvres 12 communique avec elle par une série de perçages 13 débouchant au droit de l'ouverture délimitée par les deux lèvres 8 et 9, permettant ainsi la lubrification efficace du joint supérieur. The lower seal is located between an open guide ring 10 and the annular chamber 3. It is immobilized in its housing by a flat anti-extrusion polyamide ring 11. The upper seal 6 is disposed near the upper wall of the chamber 3 and its inter-lip space 12 communicates with it by a series of holes 13 opening out at the right of the opening delimited by the two lips 8 and 9, thus allowing effective lubrication of the upper seal.
L'étanchéité est améliorée au niveau des joints par un contact plus étroit que préconisé, tant avec la tige, que dans leur logement. The seal is improved at the joints by closer contact than recommended, both with the rod, and in their housing.
Les joints, montés sans jeu, permettent d'éviter un éventuel phénomène de pompage. The seals, mounted without play, avoid any possible pumping phenomenon.
Comme indiqué, conformément à l'invention, les joints 6 et 7 sont dirigés dans le même sens, lèvres ouvertes côté pression pour obtenir un graissage de la tige en descente. As indicated, in accordance with the invention, the seals 6 and 7 are directed in the same direction, lips open on the pressure side to obtain lubrication of the rod downhill.
Les inventeurs ont remarqué qu'il suffisait de lubrifier au moins un des joints en continu entre ses deux lèvres pour obtenir, à des degrés différents, le résultat recherché de tenue joint et d'étanchéité. The inventors have noticed that it suffices to lubricate at least one of the seals continuously between its two lips to obtain, to different degrees, the desired result of seal resistance and sealing.
De façon plus générale, I'idée inventive consiste à réaliser l'étanchéité d'une tige soumise à pression gazeuse par deux joints à cavité présentant une surface de contact suffisante avec la tige, l'un des joints, de préférence le joint supérieur, étant en communication permanente avec un liquide de lubrification provenant d'une réserve, par exemple contenu dans une chambre-réservoir adjacente. More generally, the inventive idea consists in sealing a rod subjected to gas pressure by two cavity seals having a sufficient contact surface with the rod, one of the seals, preferably the upper seal, being in permanent communication with a lubrication liquid coming from a reserve, for example contained in an adjacent reservoir-chamber.
Ainsi, les moyens généraux de l'invention peuvent se limiter à un seul apport direct d'huile dans les cavités délimitées par les lèvres des joints injection directe par un graisseur ou tout autre moyen équivalent. Thus, the general means of the invention can be limited to a single direct supply of oil into the cavities delimited by the lips of the joints direct injection by a greaser or any other equivalent means.
La tige motrice 2 débouche vers le bas dans une chambre de compression 14 totalement étanche, assurant la fonction de ressort. Cette chambre est pourvue, en partie inférieure, d'une valve de remplissage 15 faisant saillie dans son volume intérieur 16. Pour éviter le contact de la tige 2 avec la valve de remplissage 15 lors de mouvements extrêmes vers le bas, la tige présente, en extrémité inférieure, une cavité adaptée 17. The driving rod 2 opens downward into a completely sealed compression chamber 14, ensuring the spring function. This chamber is provided, in the lower part, with a filling valve 15 projecting into its internal volume 16. To avoid contact of the rod 2 with the filling valve 15 during extreme downward movements, the rod has, at the lower end, a suitable cavity 17.
La particularité de l'invention concerne l'efficacité totale des moyens décrits ci-dessus. En effet, l'étanchéité de la chambre de compression est garantie- totalement aussi bien en pression de repos qu'en phase de compression. The particularity of the invention relates to the total effectiveness of the means described above. In fact, the tightness of the compression chamber is guaranteed - completely both at rest pressure and in the compression phase.
Contrairement à la normale, on constate que l'huile de lubrification se dirige en fonctionnement vers le fluide sous pression ce qui améliore encore la durée de vie des pièces mécaniques. Contrary to normal, it is found that the lubricating oil is directed in operation towards the pressurized fluid which further improves the service life of the mechanical parts.
Par ailleurs, la consommation d'huile s'avère particulièrement faible, ce qui procure de longues périodes de fonctionnement sans aucune interven t i uli. In addition, oil consumption is particularly low, which provides long periods of operation without any intervention t i uli.
L'invention a été décrite ci-dessus en détail, il est bien entendu qu'elle ne saurait se limiter aux seuls moyens décrits et représentés, mais, qu'au contraire, les variantes directes et modifications sans apport inventif telles que substitutions par des matériaux ou moyens équivalents, adjonctions d'éléments inopérants et autres changements simples sans effet technique, entrent parfaitement dans son cadre. The invention has been described above in detail, it is understood that it cannot be limited to only the means described and shown, but, on the contrary, direct variants and modifications without inventive contribution such as substitutions by materials or equivalent means, addition of inoperative elements and other simple changes without technical effect, fall perfectly within its scope.
Claims (10)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8504246A FR2579282B1 (en) | 1985-03-20 | 1985-03-20 | IMPROVED SEALING ASSEMBLY FOR GAS SPRINGS AND THE LIKE |
IT19811/86A IT1191683B (en) | 1985-03-20 | 1986-03-19 | IMPROVED SEALING COMPLEX FOR GAS SPRINGS AND SIMILAR |
DE3609189A DE3609189C2 (en) | 1985-03-20 | 1986-03-19 | Gas suspension, especially for a press tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8504246A FR2579282B1 (en) | 1985-03-20 | 1985-03-20 | IMPROVED SEALING ASSEMBLY FOR GAS SPRINGS AND THE LIKE |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2579282A1 true FR2579282A1 (en) | 1986-09-26 |
FR2579282B1 FR2579282B1 (en) | 1992-03-13 |
Family
ID=9317451
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8504246A Expired - Fee Related FR2579282B1 (en) | 1985-03-20 | 1985-03-20 | IMPROVED SEALING ASSEMBLY FOR GAS SPRINGS AND THE LIKE |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE3609189C2 (en) |
FR (1) | FR2579282B1 (en) |
IT (1) | IT1191683B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0362815A2 (en) * | 1988-10-06 | 1990-04-11 | Stabilus GmbH | A container-rod assembly |
DE4032921A1 (en) * | 1989-10-19 | 1991-04-25 | Quiri & Cie Usines | HIGH PERFORMANCE GAS COMPRESSION SPRING |
EP0464386A1 (en) * | 1990-06-21 | 1992-01-08 | Power Components, Inc. | Gas spring |
US5098071A (en) * | 1989-08-30 | 1992-03-24 | Nhk Spring Co., Ltd. | Die spring apparatus |
DE19702289A1 (en) * | 1997-01-23 | 1998-08-06 | Oventrop Sohn Kg F W | Arrangement for plug-in connection of pipe or hose with valve or fittings |
FR2779194A1 (en) * | 1998-05-28 | 1999-12-03 | Orflam Ind | Piston/cylinder pneumatic spring |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4108801A1 (en) * | 1991-03-18 | 1992-09-24 | Gerhold Dipl Ing Sames | Hydropneumatic spring damper for railed vehicles - has piston rod guide with outer flange of sleeve resting on underneath of cylinder |
DE102011119011A1 (en) | 2011-11-14 | 2013-05-16 | Hydac Technology Gmbh | Gas cylinder, in particular high-pressure gas cylinder |
CN104128513A (en) * | 2014-06-26 | 2014-11-05 | 梧州恒声电子科技有限公司 | Method of selecting nitrogen springs for metal mold |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB533526A (en) * | 1939-08-24 | 1941-02-14 | Noel Banner Newton | Improvements in or relating to gland packings for hydraulic shock absorbers |
GB687120A (en) * | 1950-11-20 | 1953-02-04 | Vickers Electrical Co Ltd | Improvements relating to sealing glands |
FR1394560A (en) * | 1964-05-06 | 1965-04-02 | Bennes Samson | Device for simplified assembly of the means for leaktight guidance of the telescopic elements of cylinders |
DE1775309A1 (en) * | 1968-07-26 | 1972-04-13 | Waeschle Maschf Gmbh | Sealing arrangement for a shaft guided through a housing wall or the like |
DE2642932A1 (en) * | 1976-09-24 | 1978-03-30 | Ringfeder Gmbh | Railway rolling stock buffer - comprising two pressure-responsive sealing rings connected by pressure-equalising chamber contg. fluid e.g. silicone oil |
GB2094416A (en) * | 1981-03-07 | 1982-09-15 | Dowty Hydraulic Units Ltd | Gaseous fluid spring devices |
DE3130760A1 (en) * | 1981-08-04 | 1983-02-24 | Robert Bosch Gmbh, 7000 Stuttgart | Sealing arrangement |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT969356B (en) * | 1971-10-01 | 1974-03-30 | Kaller S | LOCKING DEVICE |
DE7422901U (en) * | 1974-07-05 | 1974-10-31 | Stabilus Gmbh | Gas spring with oil cushion seal |
-
1985
- 1985-03-20 FR FR8504246A patent/FR2579282B1/en not_active Expired - Fee Related
-
1986
- 1986-03-19 IT IT19811/86A patent/IT1191683B/en active
- 1986-03-19 DE DE3609189A patent/DE3609189C2/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB533526A (en) * | 1939-08-24 | 1941-02-14 | Noel Banner Newton | Improvements in or relating to gland packings for hydraulic shock absorbers |
GB687120A (en) * | 1950-11-20 | 1953-02-04 | Vickers Electrical Co Ltd | Improvements relating to sealing glands |
FR1394560A (en) * | 1964-05-06 | 1965-04-02 | Bennes Samson | Device for simplified assembly of the means for leaktight guidance of the telescopic elements of cylinders |
DE1775309A1 (en) * | 1968-07-26 | 1972-04-13 | Waeschle Maschf Gmbh | Sealing arrangement for a shaft guided through a housing wall or the like |
DE2642932A1 (en) * | 1976-09-24 | 1978-03-30 | Ringfeder Gmbh | Railway rolling stock buffer - comprising two pressure-responsive sealing rings connected by pressure-equalising chamber contg. fluid e.g. silicone oil |
GB2094416A (en) * | 1981-03-07 | 1982-09-15 | Dowty Hydraulic Units Ltd | Gaseous fluid spring devices |
DE3130760A1 (en) * | 1981-08-04 | 1983-02-24 | Robert Bosch Gmbh, 7000 Stuttgart | Sealing arrangement |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0362815A2 (en) * | 1988-10-06 | 1990-04-11 | Stabilus GmbH | A container-rod assembly |
EP0362815A3 (en) * | 1988-10-06 | 1992-12-02 | Stabilus GmbH | A container-rod assembly |
US5098071A (en) * | 1989-08-30 | 1992-03-24 | Nhk Spring Co., Ltd. | Die spring apparatus |
DE4032921A1 (en) * | 1989-10-19 | 1991-04-25 | Quiri & Cie Usines | HIGH PERFORMANCE GAS COMPRESSION SPRING |
FR2653511A1 (en) * | 1989-10-19 | 1991-04-26 | Quiri Cie Sa Usines | HIGH PERFORMANCE GAS SPRING. |
EP0464386A1 (en) * | 1990-06-21 | 1992-01-08 | Power Components, Inc. | Gas spring |
DE19702289A1 (en) * | 1997-01-23 | 1998-08-06 | Oventrop Sohn Kg F W | Arrangement for plug-in connection of pipe or hose with valve or fittings |
DE19702289C2 (en) * | 1997-01-23 | 2003-04-03 | Oventrop Sohn Kg F W | Arrangement for connecting pipes or hoses with fittings or fittings |
FR2779194A1 (en) * | 1998-05-28 | 1999-12-03 | Orflam Ind | Piston/cylinder pneumatic spring |
Also Published As
Publication number | Publication date |
---|---|
DE3609189A1 (en) | 1986-11-06 |
IT8619811A1 (en) | 1987-09-19 |
FR2579282B1 (en) | 1992-03-13 |
IT1191683B (en) | 1988-03-23 |
IT8619811A0 (en) | 1986-03-19 |
DE3609189C2 (en) | 1995-08-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |