EP3794253A1 - Seal, in particular for a rotary ball valve fitting - Google Patents
Seal, in particular for a rotary ball valve fittingInfo
- Publication number
- EP3794253A1 EP3794253A1 EP19723435.4A EP19723435A EP3794253A1 EP 3794253 A1 EP3794253 A1 EP 3794253A1 EP 19723435 A EP19723435 A EP 19723435A EP 3794253 A1 EP3794253 A1 EP 3794253A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- seal
- rigid
- flexible
- sealing
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0673—Composite packings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
- F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0673—Composite packings
- F16K5/0678—Composite packings in which only one of the components of the composite packing is contacting the plug
-
- 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
- F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
Definitions
- the present invention relates to the field of devices for regulating fluid circulation, more particularly proportional valves or operating according to the so-called "all or nothing" principle, and more particularly that of rotary ball valves and relates to a gasket. sealing, especially for such a rotary valve.
- the joints employed always consist of several parts or elements, generally a sealing ring bearing on said plug, an annular sealing body and a reinforcing ring, which multiplies disadvantageously. the number of interfaces (and therefore the risk of leakage) and also complicates the assembly of the various components.
- the present invention aims to propose a solution overcoming at least some of these disadvantages.
- the invention proposes a seal, in particular for a rotary valve, preferably for a rotary valve with at least two channels and advantageously three-way, said seal having, on the one hand, a sealing body flexible and flexible annular static and provided with a radial lip and secondly, a rigid dynamic sealing ring made of a low friction material material, carried by said annular static sealing body, the formed structural assembly by the annular static sealing body and the dynamic sealing ring being arranged with sliding ability guided in the opening passage portion of the opening concerned, the rigid sealing ring bearing against said rotary plug, and the internal face of said sealing ring, opposite to that in contact with the rotary plug, coming opposite the inner face of the radial lip of the annular sealing body, opposite to the face coming into contact with the hollow body of the valve, the thrust force produced by the fluid at said seal causing the spacing of these two elements to ensure sealing, sealing gasket characterized in that the flexible and flexible annular static sealing body provided with a radial lip and the rigid dynamic sealing ring are made in one
- a rotary valve preferably a two-way spherical rotary ball valve, characterized in that it comprises a seal according to the invention, a valve body defining a receiving chamber and a ball valve received in the receiving chamber of said valve body characterized in that it comprises a seal also according to the invention.
- FIG. 1 schematically and schematically shows in section a ball valve with an inlet and an outlet (so-called two-way valve), provided with a seal according to the invention, in a suggested position. closed;
- Fig. 2 is an enlarged partial view of the dotted region of Fig. 1;
- FIGS. 4a and 4b respectively show a perspective view of a three-way ball valve complete with its fixing plate and its electric actuator or geared motor, for example for a motor vehicle and a perspective view in section along a plane. vertical passing through the center of the valve of Figure 4a;
- Figure 5 shows a simplified greatly enlarged view of the active area of the seal according to the invention.
- FIG. 6 shows a greatly enlarged simplified view of the active zone of an inverted seal according to the invention for a variant in which the flow direction of the fluid is reversed.
- Figures 1 to 3 illustrate a seal 1 used, by way of preferred example, in a conventional rotary valve 2, as found for example in the field of the automotive industry.
- a valve has a plurality of openings and at least one inlet opening and one fluid outlet opening.
- the plug 2 may be made by molding a thermoplastic material, for example PPS (polyphenylene sulfide).
- Such a valve shown schematically in Figure 1, here has a fluid inlet, a plug 2 and a fluid outlet.
- It also comprises a hollow valve body 3, provided with at least one inlet opening and at least one outlet opening and defining a receiving chamber for said plug 2, the latter having a spherical outer surface, at least at the portion or portions of the outer surface facing the aperture (s) in any one of the possible rotational positions of said plug (2).
- Said valve also comprises at least one device or seal 1 made, in accordance with the present invention, integrally, that is to say in one piece, installed coaxially in a portion of internal passage passing through at least one of the openings and comprising, on the one hand, an annular body provided with a flexible radial lip 4 'sealing against the inner face of the passage portion, on the other hand, a sealing ring 5 made in a material with a low coefficient of friction, carried by the annular sealing body and intended to bear tightly against the outer surface of the plug 2, and finally, an elastic prestressing means 6 axially biasing said annular sealing body towards the bushel 2, the whole structural member formed by said annular sealing body and said sealing ring being slidably arranged guided in the passage portion opening of the opening concerned.
- a device or seal 1 made, in accordance with the present invention, integrally, that is to say in one piece, installed coaxially in a portion of internal passage passing through at least one of the openings and comprising, on the one hand, an
- said seal 1 according to the invention in particular for a rotary valve, preferably for a two-way rotary valve, is distinguished in that it comprises on the one hand, a flexible and flexible annular sealing body 4 provided with a radial lip 4 'and, on the other hand, a rigid dynamic sealing ring 5 made of a material with a low coefficient of friction, carried by said annular static sealing body 4, the structural assembly formed by the annular static sealing body 4 and the dynamic sealing ring 5 being arranged with sliding ability guided in the passage portion opening out of the opening concerned, the rigid sealing ring 5 bearing against said plug 2, and the inner face 5 'of said sealing ring, opposite that in contact with the bushel ro 2, coming opposite the inner face 4 "of the radial lip 4 'of the annular sealing body 4, opposite the face coming into contact with the hollow body 3 of the valve, the thrust force produced by the fluid at the level of said seal 4 causing the spacing of these two elements 4, 5 to ensure sealing.
- the pressure exerted by said fluid causes a spacing of the two elements 4, 5 to ensure the tightness of the assembly.
- the pressure of the fluid which infiltrates between the hollow body 3 of the valve and the rotary plug 2 already participates in the compression of the radial lip 4 '.
- the empty space 7 traversed by the fluid also makes it possible in this case to equalize and distribute the pressure (FIG. 3).
- the seal 1 according to the invention is characterized in that it has precisely an elastic prestressing means 6 situated between said flexible annular static sealing body 4 and the dynamic sealing ring 5 rigid and axially biasing these two elements 4, 5 to ensure precisely tightness, particularly in the direction of the rotary plug 2, said elastic prestressing means 6 pressing under pressure against the inner face 5 'of the rigid sealing ring 5 opposite to that in contact with the rotary plug 2 and the inner face 4 "of the radial lip 4' of the annular sealing body 4, opposite to the face coming into contact with the hollow body 3 of the valve, the thrust force produced by said spring 6 causing the spacing of these two elements s 4, 5 to ensure the aforementioned seal.
- This seal 1 above, with or without elastic prestressing means 6, is usually mounted in a seat structure, in the form of concentric annular shoulders, constituted by said portion of the through passage.
- This configuration of said passage portion makes it possible to house the seal 1 without substantially reducing the passage diameter of the opening (no pressure drop in the open position of the plug 2 - substantially identical passage diameters for the opening, the sealing device 1 and the opening of the plug 2) while providing a support for the elastic prestressing means 6 when present.
- FIG. 3 shows a distribution of the rigid part and the flexible part of the seal according to the invention.
- the seal 1 according to the invention is characterized in that it is made of a fluorinated polymer, or preferably of PTFE or a material mainly composed of PTFE known more generally under the registered trademark "Teflon” .
- PTFE fluorinated polymer
- Teflon a material mainly composed of PTFE known more generally under the registered trademark "Teflon” .
- other synthetic materials usually used for the manufacture of this type of seals may also be suitable.
- the seal 1 according to the invention is further characterized in that the dynamic sealing ring 5 has a rigid free-beveled end section intended to provide a surface 5 "of potential contact, particularly with the plug 2, of frustoconical shape, with a dynamic sealing zone located between the outer and inner edges of the bevel, and therefore between the outer and inner circular limits of said surface potential contact 5 ".
- the minimum thickness of the rigid portion formed by the rigid dynamic sealing ring 5 is 2 mm, preferably 4 mm, and / or the maximum thickness of the flexible part formed by the body.
- annular static seal 4 is 1 mm, preferably 0.6 mm.
- the rigid part makes it possible in particular to avoid excessive deformation during the rotation of the plug 2.
- the distribution of the pressure exerted advantageously makes it possible to direct said rigid portion toward said bushel 2 and the radial lip 4 ', thanks to its great flexibility, to the hollow body 3, considering an interface between the two dissociated zones.
- the flexible portion formed by the radial lip 4 ' also makes it possible to compensate for the total height of the rigid dynamic sealing ring 5.
- the radial lip 4 'of the annular static sealing body 4 is situated at the rear face 4 "of said body 4 and is produced by partial segmentation of an outer peripheral strip of the constituent material of the latter, so as to form an elastically deformable skirt, inclined and protruding outwardly in the absence of stress.
- the seal 1 according to the invention is characterized in that the elastic prestressing means 6 is, when present, a compression spring, a spring known under the English name of "energizer spring Such as a finned spring or a wave spring.
- energizer spring Such as a finned spring or a wave spring.
- Other equivalent means for storing mechanical energy can also be envisaged.
- Said compression spring makes it possible to spread the radial lip 4 'and to apply a contact pressure with the hollow body of said valve 3 in the flexible part. It also makes it possible to advantageously direct the rigid part towards the plug 2 in order to ensure a contact pressure with the latter and to achieve the desired sealing in a constant and reliable manner (see FIG. Otherwise, it is the fluid (liquid or gas) that exerts its own pressure on the seal 1, which is sometimes sufficient.
- the invention further relates to a rotary valve, preferably a two-way spherical rotary ball valve 2, characterized in that it comprises a seal 1 according to the invention.
- said rotary plug valve 2 can be adapted to different constructive variants both in terms of the shape of the plug 2 that the number of openings and the direction of fluid flow.
- FIG. 6 is a special case of Figures 4b and 5 which show partial enlargements of the seal 1 according to the invention cut at the same place with two different flow directions of the fluids as indicated by the two arrows.
- At least one of the openings comprises (s) a monobloc seal 1, as described above.
- the plug 2 is a spherical plug, said valve 1 having, for example, an inlet opening and two outlet openings.
- the valve may be structurally integrated with a functional and structural module by being mounted downstream or upstream of a water pump also incorporated in said module, and or be mounted (integrally or independently) in a cooling fluid circulation circuit of an internal combustion engine of a motor vehicle.
- the invention therefore makes it possible to propose a seal 1 which has only one element intended to achieve the seal, namely the rigid dynamic sealing ring 5 and the radial lip 4 ', thanks to the pressure coming from the inside of the rotary plug 2.
- the latter is, according to the invention, made in two parts: a solid part (rigid) in contact with said rotary plug 2 and a thinner part (flexible) in contact with the main body 3 of the valve in which it is mounted .
- a resilient biasing means 6 provides an element for storing mechanical energy to separate more easily and more reliably the two aforementioned parts of said ring.
- this element will advantageously be a spring. That said, the storage element may very well be made of an elastomeric material.
- the seal 1 according to the invention can also be integrated with any type of adapted valve, in particular with a so-called “multichannel” valve, and typically with a two-way valve.
- a so-called "multichannel" valve and typically with a two-way valve.
- Such valves are particularly useful in the field of the automotive industry, in particular for application in the engine cooling system of a motor vehicle.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1854152A FR3081200B1 (en) | 2018-05-18 | 2018-05-18 | SEAL, ESPECIALLY FOR A ROTARY BALL VALVE |
PCT/EP2019/062612 WO2019219807A1 (en) | 2018-05-18 | 2019-05-16 | Seal, in particular for a rotary ball valve fitting |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3794253A1 true EP3794253A1 (en) | 2021-03-24 |
Family
ID=62751173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19723435.4A Withdrawn EP3794253A1 (en) | 2018-05-18 | 2019-05-16 | Seal, in particular for a rotary ball valve fitting |
Country Status (5)
Country | Link |
---|---|
US (1) | US11466779B2 (en) |
EP (1) | EP3794253A1 (en) |
CN (1) | CN112368496B (en) |
FR (1) | FR3081200B1 (en) |
WO (1) | WO2019219807A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112343924A (en) * | 2020-10-29 | 2021-02-09 | 广州市昊志机电股份有限公司 | Main shaft contact type sealing structure, main shaft and machine tool |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3233862A (en) * | 1961-10-03 | 1966-02-08 | North American Aviation Inc | Fluid pressure balanced seal |
US3184213A (en) * | 1962-10-08 | 1965-05-18 | Acf Ind Inc | Seat for top entry ball valve |
DE2444716C3 (en) * | 1974-09-19 | 1980-09-18 | Ernst 2000 Hamburg Hoyer | Stopcock, in particular ball valve, with a floating plug |
JPS51143927A (en) * | 1975-06-06 | 1976-12-10 | Kitazawa Shoji Kk | Ball valve |
JPS55100472A (en) * | 1979-01-26 | 1980-07-31 | Tokyo Kousou Kk | Sealing apparatus of valve |
US4290581A (en) * | 1979-09-21 | 1981-09-22 | Acf Industries, Incorporated | Seat assembly for ball valves |
CA1133877A (en) * | 1979-12-12 | 1982-10-19 | Ulrich H. Koch | Ball valve and seat assembly |
US4410165A (en) * | 1982-02-16 | 1983-10-18 | Whitey Co. | Ball valve and seat assembly |
US4899980A (en) * | 1989-01-10 | 1990-02-13 | Kemp Development Corporation | Ball valve |
US5088687A (en) * | 1990-09-19 | 1992-02-18 | Stender Carl H | Ball valve seat for high temperature service |
GB2281607B (en) * | 1993-09-07 | 1997-10-22 | Specialist Sealing Ltd | Gate valve seat |
DE19520900A1 (en) * | 1995-06-01 | 1996-12-12 | Rautenkranz Int Hermann | Shut=off valve for pipe |
US6499720B1 (en) | 2001-08-02 | 2002-12-31 | Jen-Chieh Lee | Fireproof structure of a ball valve |
US7484710B2 (en) * | 2002-03-19 | 2009-02-03 | Fisher Controls International Llc | Fluid flow control valve with high temperature bi-directional shutoff |
DE10351852A1 (en) | 2003-11-06 | 2005-06-16 | Itw Automotive Products Gmbh & Co. Kg | Cooling system for combustion in machines, especially for automobiles |
DE102006038213B4 (en) | 2006-08-16 | 2010-11-11 | Itw Automotive Products Gmbh & Co. Kg | thermostatic valve |
DE102009014047A1 (en) | 2009-03-19 | 2010-09-23 | Schaeffler Technologies Gmbh & Co. Kg | Control valve for controlling a coolant circuit of an internal combustion engine, has two supply connections, where former supply connection is arranged at valve housing for cooling water of bypass cycle |
TWI442329B (en) | 2009-08-10 | 2014-06-21 | Primax Electronics Ltd | Image processing method for deriving text characteristic image from input image and related apparatus thereof |
US9982789B2 (en) * | 2009-12-07 | 2018-05-29 | Cameron International Corporation | Self-relieving ball valve seat |
EP2718598A4 (en) * | 2011-06-08 | 2015-03-18 | Bray Int Inc | In-line repairable metal seated floating ball valve |
FR3017177B1 (en) | 2014-01-31 | 2016-08-19 | Systemes Moteurs | ROTARY SPHERICAL BALL VALVE AND METHOD OF MANUFACTURING THE SAME |
WO2016007127A1 (en) * | 2014-07-07 | 2016-01-14 | Flowserve Management Company | Valve assemblies, valve seats including flexible arms, and related methods |
-
2018
- 2018-05-18 FR FR1854152A patent/FR3081200B1/en active Active
-
2019
- 2019-05-16 US US17/054,927 patent/US11466779B2/en active Active
- 2019-05-16 WO PCT/EP2019/062612 patent/WO2019219807A1/en unknown
- 2019-05-16 CN CN201980033577.3A patent/CN112368496B/en active Active
- 2019-05-16 EP EP19723435.4A patent/EP3794253A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
US20210254717A1 (en) | 2021-08-19 |
WO2019219807A1 (en) | 2019-11-21 |
FR3081200A1 (en) | 2019-11-22 |
FR3081200B1 (en) | 2021-07-23 |
US11466779B2 (en) | 2022-10-11 |
CN112368496A (en) | 2021-02-12 |
CN112368496B (en) | 2023-03-28 |
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