WO2014044259A1 - Dispositif de guidage d'air destiné à la régulation de la pression de gonflage de pneumatique - Google Patents

Dispositif de guidage d'air destiné à la régulation de la pression de gonflage de pneumatique Download PDF

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Publication number
WO2014044259A1
WO2014044259A1 PCT/DE2013/200092 DE2013200092W WO2014044259A1 WO 2014044259 A1 WO2014044259 A1 WO 2014044259A1 DE 2013200092 W DE2013200092 W DE 2013200092W WO 2014044259 A1 WO2014044259 A1 WO 2014044259A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
sealing
sealing ring
ring element
tire
Prior art date
Application number
PCT/DE2013/200092
Other languages
German (de)
English (en)
Inventor
Andreas Kaiser
Christian Heid
Marc-André SCHÄFER
Original Assignee
Schaeffler Technologies AG & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2014044259A1 publication Critical patent/WO2014044259A1/fr

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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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/005—Fluid passages not relating to lubrication or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00345—Details of the rotational joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00354—Details of valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00363—Details of sealings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00372—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres characterised by fluid diagrams
    • 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
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/185—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with two raceways provided integrally on a part other than a race ring, e.g. a shaft or housing
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race

Definitions

  • the invention relates to an air guide arrangement for a tire pressure regulating device which, as such, makes it possible to form a duct system suitable for supplying compressed air to a system section running on the wheel side in the region of a wheel bearing.
  • This known air duct arrangement comprises a sealing ring designed as a flat ring element of the two sealing lips which, as such, start up in a permanently dragging manner on a ring body placed on the sealing ring.
  • the two sealing lips permanently seal off a channel section so that compressed air can be passed through this channel section.
  • Tire pressure regulating devices are used in particular to optimize the tire pressure depending on load or terrain. In this case, for example, in loose and muddy ground, the pressure is lowered to achieve a larger Radaufstands Design. After crossing such a terrain section, the tire pressure is generally increased again to lower the tire load and the rolling resistance again.
  • Reifenendruckregulier experienceden with vehicle-side filling or with wheel-side filling systems such as radial piston pumps. Reifenyakregulier respondeden with on-board filling system use rotary unions which are either part of the wheel hub or are additionally mounted on this. These must permanently hold or seal a connection between the tire and the vehicle side.
  • Wheel-side filling systems require a pump unit in each wheel, which causes correspondingly high costs.
  • the pump units are in great danger in this exposed position.
  • Permanently sealed and pressurized rotary unions are subject to high wear, which requires a very massive design and regular replacement of wear parts.
  • By control pressure applied seals require in the known variants complex structures with control lines, movement grooves and directional control valves.
  • the execution of all three functions of a tire pressure control system (measuring, filling, draining) via the rotary feedthrough thereby leads to frequent loading of the sealing system and associated high wear. The above factors all cause high costs, making such tire pressure control systems viable only for special applications (heavy construction and agricultural machinery, military vehicles, etc.).
  • the invention has for its object to provide solutions by which it is possible to make a tire pressure regulation in an improved over previous approaches way.
  • the invention has for its object to provide a rotary feedthrough for a tire pressure control device, which is low maintenance and less expensive than the known variants.
  • a ring wall formed by the sealing ring element and extending between an intermediate region lying between the two sealing lip devices and comprising an annular space side facing the annular space and an outer side facing away from the annular space,
  • a channel or valve structure is formed in the annular wall, which assumes an open position in the construction of a design-defined minimum pressure in the annular chamber.
  • the sealing ring element is designed such that the first sealing lip device and the second Dichtlippeneinnchtung according to the pressure prevailing in the annulus pressure from a smooth running position are displaced into a sealing position.
  • this smooth running position it may be a position in which at most an extremely low contact pressure between the respective sealing lip device and the tread contacted by this prevails.
  • the smooth running position to a position in which the sealing lip device at most bears against the tread without pressure, preferably stands out from this to form a small running gap.
  • the sealing ring element is preferably made of an elastomer material, for example NPBR.
  • NPBR elastomer material
  • the respective sealing lip device can form a plurality of circumferential sealing lips, which possibly rest on the respective running surface with different seat forces.
  • Some circumferential sealing lips can act as permanent under low contact pressure on the respective running surface and thereby cause a certain sealing of the lubricant filling an adjacent rolling bearing, further circumferential sealing lips are designed so that they serve for sealing in temporary Druck Kunststoffbuchbeaufschlagung, so only be active when in the annulus a corresponding pressure prevails.
  • These circumferential sealing lips are preferably geometrically designed such that they effect a reliable sealing and prevention of the passage of air, and are otherwise passive. When adopting the passive position no wear occurs on these special circumferential sealing lips.
  • the function of the air guiding device according to the invention is in this case also guaranteed even if the grease sealing lips provided for the bearing seal are possibly already worn out.
  • the channel structure formed in the annular wall is designed as a slot valve device. leads.
  • This slit valve device can be designed so that it opens upon reaching a predetermined between the annulus side of the annular wall and the outside of the prevailing pressure difference.
  • This pressure difference is for example in the range of 0.2 to 0.4 bar.
  • the sealing lip devices of the sealing ring element can be urged highly effectively into an active position.
  • the inventive concept can be implemented constructively so that the sealing lip devices are displaced radially and / or axially under the effect of the prevailing pressure in the annular chamber.
  • the displacement path is depending on the diameter of the sealing ring element possibly only about 0.1 mm, wherein after contacting the tread under the effect of the chamber pressure of the contact pressure of the respective sealing lip device can be further increased.
  • the sealing ring element can be used according to a particularly preferred embodiment of the invention in a wheel bearing device.
  • the sealing ring element is preferably secured to the stationary component of the wheel bearing device. This backup can be done by inserting the sealing ring element under a sufficient interference fit.
  • the sealing ring element according to the invention is preferably located in an intermediate region between a first rolling body raceway and a second rolling body raceway.
  • the air guide arrangement according to the invention can be designed so that it comprises a relatively robust, for example, made of a sheet material or high-strength plastic material support ring comprises on which the sealing ring element is secured.
  • the securing of the sealing ring element can be carried out by the sealing ring element is snapped under temporary elastic deformation on corresponding folding geometries on the support ring.
  • the sealing ring element on the support ring Ensure material connection, especially with this to glue or to connect it to the support ring by vulcanization.
  • this valve On the rotating side "tire side” a non-return valve is necessary, which keeps the pressure in the tire in.
  • this valve is designed to reach a certain, relatively low differential pressure eg in the range of 0,5 - 0,3 bar ( Now higher pressure on the rotating side "tire side”) opens. From this differential pressure until the tire pressure is reached, air can be removed from the tire back into the feed system. An achieved target pressure is maintained by quickly removing pressure from the supply side so that the differential pressure exceeds 0.5 - 0.3 bar and then actually completely closes the valve.
  • a valve provided in the rotating system can also be designed so that this occurs when a certain pressure difference between the tire interior and the pressure in the stationary one occurs This open position is designed so that it provides only a small, strongly throttling channel via the wheel bearing guided duct system to vent so that when relief of the special sealing lips no significant residual pressure prevails in the leading to the valve channel section.
  • the above-described system according to the invention serves primarily to supply and possibly discharge a tire inflation gas, eg air, N 2, He, Ne, or CO 2. It can also be used to supply other media, in particular fluids / foams, to the interior region of a tire, which serve for the interim repair of a puncture, in particular a leak of the tire.
  • a tire inflation gas eg air, N 2, He, Ne, or CO 2.
  • other media in particular fluids / foams
  • FIG. 1a shows a detailed representation of an air guidance system according to the invention
  • FIG. 3 is a schematic diagram for explaining a variant in which a pressure initially displaced radially under the effect of the pressure prevailing in an annular space is followed by a radial displacement of the sealing lips;
  • Figure 4a is a schematic representation for explaining a variant in which a first under the effect of prevailing in an annular space pressure, an axial displacement of the sealing lips takes place;
  • Figure 4b is a schematic representation for explaining a variant in which a ruling under the effect of in an annulus Pressure initially an axial displacement of the sealing lips takes place with a shown, biased check valve;
  • Figure 5 is another schematic representation to illustrate various aspects
  • FIG. 1 a the structure of an air guide arrangement according to the invention is shown in the form of a detailed representation.
  • This air guide arrangement serves to guide a tire inflation gas from a "stationary" region of a wheel bearing - in this case, in particular, a hub carrier 1 - into a system section running along the wheel side - here a wheel hub 2.
  • the air guide arrangement comprises a sealing ring element 3.
  • This sealing ring element 3 forms a first sealing lip device 3a and a second sealing lip device 3b.
  • the annular ring 3c extends in an intermediate region lying between the two sealing lip devices 3a, 3b and forms an annular space side 3d facing the annular space 4 and an outer side 3e facing away from the annular space 4.
  • the sealing ring element 3 shown here is inventively designed such that in the annular wall 3c, a channel structure 3f is formed, which assumes an open position only when building a predetermined prevailing at the annular wall 3c minimum pressure difference.
  • the sealing ring element 3 is furthermore embodied in such a way that the first sealing lip device 3 a and the second sealing lip device 3 b form a pressure in accordance with the pressure prevailing in the annular space 4chtlauf ein are displaced in a sealing position.
  • the sealing lip devices 3a, 3b are not in contact with the running surfaces 2a, 2b of the wheel hub 2 under a possibly low contact pressure.
  • the channel structure 3f is formed in this embodiment as a slot valve device and opens only when an effect acting on the annular wall 3c pressure difference of about 0.3 bar.
  • the sealing ring element 3 is here designed in such a way that, under the effect of the pressure prevailing in the annular chamber 4, the sealing lip devices 3a, 3b are displaced radially until they rest sealingly on the running surfaces 2a, 2b.
  • the slit valve device 3f here ensures a minimum contact pressure.
  • the sealing ring element 3 shown here is used in a wheel bearing device explained in more detail below and in this case secured to the hub carrier 1 of the wheel bearing device functioning as a stationary component.
  • the sealing ring element 3 is located in the wheel bearing device in an intermediate region between a first rolling body track B1 and a second rolling body track B2.
  • the air guide arrangement comprises a support ring 5 on which the sealing ring element is secured.
  • the sealing ring element 3 is snapped in this embodiment under temporary elastic deformation of the support ring 5. It can also be materially connected to this.
  • the support ring 5 is seated under slight interference fit sealingly in an inner bore 1 a of the hub carrier. 1
  • the support ring is made as sheet metal forming part and forms a circumferential groove 5a. This circumferential groove is bounded by a groove bottom 5b. In the groove bottom 5b through holes 5c are formed. Via these passage openings 5 c, the compressed air supply duct 1 b formed in the hub carrier 1 communicates with the annular space
  • an electronically controllable valve device is located in the area of the system section that is running along the wheel side.
  • This preferably comprises a check valve and a pressure relief channel via which also the hub-side gas guide channel 2 can be relieved.
  • the gas guide is preferably unwound under the electronic control of corresponding valve members in such a way that the gas guide channel 2c is relieved at or slightly before the interruption of the pressurized gas loading of the gas guide channel 1b. This ensures that any compressed air present in the gas guide channel 2c does not escape towards the bearing when the annular chamber 4 is relieved of load.
  • channel structure 3f formed in the ring wall 3c i. to make the slit valves so that they open in the opposite direction under a lower pressure, so that a pressure release in the region of the gas guide channel 2c can also be done via the channel structure 3f.
  • FIG. 1 b illustrates the structure of a wheel bearing, which is equipped as such with an air guide arrangement according to the invention according to FIG.
  • the air guide arrangement is as stated between the raceways B1, B2 of the rolling elements designed here as balls.
  • the air guide assembly is seated in the hub carrier 1 and connects the stationary gas guide channel 1 b with the hub-side gas guide channel 2c.
  • the treads 2a, 2b cooperating with the sealing lip devices 3a, 3b are formed here directly by a correspondingly finely ground surface of the wheel hub 2. It is also possible to form these running surfaces by a ring element which sits on the wheel hub 2 and communicates via suitable channel geometries with the gas guide channel 2c.
  • the inventive air guide arrangement can then be designed as a cassette element which provides the treads relevant for the sealing lip devices 3a, 3b itself.
  • the invention provides a sealing system which is integrated into a wheel bearing unit and is applied and pressurized only to fill the tire.
  • the air guiding device according to the invention forms a rotary feedthrough for a wheel bearing unit of the "3-generation" shown here in which a part of the rolling body rolling surfaces is provided directly by the hub carrier and the hub, as well as by a bearing inner ring 7.
  • the bearing inner ring 7 axially abuts on forming processes
  • the seal is applied and acted upon only during the filling process, which is to be kept short due to the high pressure difference, while the rest of the operation is non-contacting and therefore wear-free
  • These can be battery powered, or powered by an inductor charger, for example, as shown between ball rows B1, B2 at the center of gravity of the bearing (this eliminates the need for tilting) e
  • Assembly on stationary bearing ring or here on the hub carrier 1 takes place in order to realize the desired filling pressure control and to exclude speed-dependent centrifugal force effects.
  • the compressed gas is supplied via the bore 1 b in the vehicle-side stationary bearing ring and is distributed via a distributor groove radially on the seal.
  • the seal is designed as a closed cassette with radial or axial sealing surfaces and circumferentially arranged slit valves.
  • the slit valves have in Filling direction a higher opening pressure (eg 0.3 bar) than in the discharge direction (a few mbar). This ensures that when the pressure builds up first the seal is under internal pressure and the non-contact sealing surfaces 3a, 3b are applied. Only after exceeding the opening pressure is a passage of the compressed gas possible. Due to the ratios of inner to outer surfaces of the seal, the force required to apply the sealing surfaces during the filling process remains.
  • the wheel-side filling hole 2c is provided with a check valve.
  • the vehicle-side pressure line is completely relieved, the check valve closes and the residual pressure in the filling hole escapes back through the slit valve of the seal. Due to the low opening pressure in the discharge direction, the wheel bearing unit is almost completely relieved in the shortest possible time.
  • the provision of the sealing surfaces is done by the elasticity of the sealing material. Any residual pressure in the bearing can escape through the vehicle-side pressure line, since the bearing internal pressure can escape through the slit valves of the seal when not engaged sealing surfaces.
  • the air guide arrangement according to the invention is particularly suitable for use in conjunction with tire pressure monitoring systems with radio transmission.
  • FIG. 1 c shows a further embodiment of an inventive air guide arrangement for a vehicle wheel bearing.
  • the air guide assembly comprises in the same manner as the embodiment of Figures 1 a and 1 b, a sealing ring element 3.
  • This sealing ring member 3 forms a first sealing lip means 3a and a second sealing lip means 3b.
  • the annular ring 3c extends in an intermediate region lying between the two sealing lip devices 3a, 3b and forms an annular space side 3d facing the annular space 4 and an outer side 3e facing away from the annular space 4.
  • the sealing ring element 3 shown here is also designed according to the invention such that a channel structure 3f is formed in the annular wall 3c, which assumes an open position only when a predetermined minimum pressure difference prevailing on the annular wall 3c is established.
  • the sealing ring element 3 is furthermore designed in such a way that the first sealing lip device 3a and the second sealing lip device 3b are displaceable from the smooth running position into the sealing position shown here in accordance with the pressure prevailing in the annular space 4. In that smooth-running position, the sealing lip devices 3a, 3b are not in contact with the running surfaces 2a, 2b of the wheel hub 2 under a possibly low contact pressure.
  • the channel structure 3f again takes the form of a slot valve device and only opens upon the action of a pressure difference of approximately 0.3 bar acting on the annular wall 3c.
  • the sealing ring element 3 is here designed in such a way that, under the effect of the pressure prevailing in the annular chamber 4, the sealing lip devices 3a, 3b are displaced radially until they rest sealingly on the running surfaces 2a, 2b.
  • the slit valve device 3f here ensures a minimum contact pressure.
  • the support ring 5 is designed so that the sealing ring member 3 is received in this and thus laterally supported by the support ring 5.
  • the support ring 5 forms a left and a right annular shoulder 5d, 5e.
  • These annular shoulders 5d, 5e are here designed such that these ring flanks 5f, 5g, which as such each provide a cone structure.
  • the sealing ring element 3 made of an elastomeric material is forced into the respective cone structure in such a way that the sealing ring element 3 narrows radially and thus with increased contact pressure on the treads 2a, 2b seated.
  • auxiliary sealing lips 3g, 3h are excluded. formed this contact the treads 2a, 2b and provide a certain sealing effect even before contacting the treads 2a, 2b by the likewise pressure-activated sealing lip devices 3a, 3b ready.
  • these auxiliary sealing lips additionally prevent a passage of compressed air to the web region B1, B2 of the rolling bodies and cause a grease seal off of the gas guiding channel 2c.
  • FIG. 2 a shows the structure of a sealing ring element 3 according to the invention.
  • the channel structure 3f is designed as a cross-slit valve which opens at a pressure acting on the annular wall 3c pressure difference of about 0.3 and allows gas flow from the annular space 4 in the wheel-side, not shown here channels. In the opposite direction open the Phillips valves at a lower pressure difference.
  • FIG. 2b illustrates the structure of a slightly modified variant of a sealing ring element 3 according to the invention.
  • the channel structure 3f is formed as a straight slot valve which also opens at a pressure acting on the annular wall 3c pressure difference of about 0.3 bar.
  • FIG. 3 again shows the basic mechanics of the air guiding arrangement according to the invention in the form of a schematic representation.
  • the air guide arrangement serves as
  • This consists of a sealing ring element 3 with here radially pressure-controlled displaceable sealing lips 3a, 3b and extending between these sealing lips 3a, 3b sealing wall 3c, with at least one slit valve 3f.
  • the sealing ring element 3 is seated in a support ring 5 and is glued into it.
  • the slit valve 3f seals up to the opening pressure (approx. 0.3 bar). This initial pressure presses the sealing lips 3a, 3b radially against the sealing surfaces 2a, 2b on the inner ring, or on the wheel hub 2.
  • the air guide arrangement according to the invention enables a secure seal even with slow pressure build-up. The flow only takes place after sealing, so there is no danger of blowing out the bearing grease.
  • the closing force of the respective slit valve 3f can be adjusted by inducing a slight angle of incidence of the corresponding flanks of the annular wall 3c, for example by slight axial compression of the entire gasket.
  • FIG. 4a shows an air guide arrangement for tire pressure regulation.
  • This air guide arrangement also comprises a slot-valve-controlled seal.
  • an axial displacement of the sealing lip devices 3a, 3b takes place under the effect of the pressure prevailing in the annular chamber 4.
  • These are pressure-controlled axially displaced on thrust washers 6a, 6b.
  • This variant requires a relatively small axial space, and allows a relatively simple, robust seal geometry and requires little additional processing on the inner ring IR.
  • the outer ring 1 also forms the stationary component here.
  • the support ring 5 which also secures the sealing ring element 3.
  • the sealing ring element 3 is glued into the support ring 5.
  • the slot valve seals to the opening pressure (about 0.3 bar), this initial pressure pushes sealing lips 3a, 3b axially against the sealing surfaces 6c, 6d on the thrust washers 6a, 6b and allows a secure seal even with slow pressure build-up. The flow only takes place after sealing, again there is no danger of blowing out the bearing grease.
  • FIG. 4b shows the air guide assembly described in Figure 4a, but now with a biased check valve 24, via which the set pressure is maintained in the tire. Since the check valve on the bias voltage on application of an input pressure already and exceeding a certain differential pressure opens before the tire pressure is reached, can be reduced in the range from opening to reaching the tire pressure, a pressure. If the inlet pressure exceeds the tire pressure, pressure is added to the tire. If the input pressure is abruptly removed, the pressure difference rises above the opening differential pressure and the check valve closes. The set pressure is held.
  • the air duct arrangement shown here is provided with relief ducts 8, 9 by way of example.
  • This relief channels 8, 9 open into an opposite to the sealing edges K1, K2 of the sealing lip devices 3a, 3b axially offset region of the treads 2a, 2b and allow drainage of any penetrating into this area compressed air.
  • This discharge channels 8, 9 communicate via gas-permeable membrane elements 10, 1 1 with the environment. Through this discharge channels 8, 9 it is avoided that any compressed air flowing under the sealing edges K1, K2 blows out lubricant from the adjacent bearing.
  • Variant I comprises a check valve 12 which, as can be seen, has a check valve. Position einninnnnt as soon as the pressure P1 in the channel section S1 is smaller than the pressure P2 inside the tire 13.
  • the pressure prevailing in the tire 13 pressure by an electronic circuit 14th detected and transmitted to a receiving circuit 15 wirelessly.
  • the circuit 14 may be designed so that it can be controlled via this valve device which possibly enables a tire venting via the outlet 16 indicated here.
  • the system according to variant 1 enables a reliable blocking of the channel section S1 against pressure losses and offers the functions "pressure measurement" and "pressure reduction” via the circuits 14, 15.
  • Variant II comprises a shut-off valve 17 whose switching state is adjustable via the difference of the pressures P1, P2.
  • the check valve 17 can be designed so that this "still" or “already” is open when the pressure in the system section S1 is about 0.3 to 0.5 bar below the pressure in the tire 13. This makes it possible to gently reduce the tire pressure P2 by setting in the system section S1 a pressure of about 0.3 to 0.5 bar below the current tire pressure.
  • the check valve 17 assumes an open position at this small pressure difference and the gas in the tire 13 can flow off smoothly over the system section S1.
  • This special function can be realized by various valve mechanisms.
  • an embodiment is shown in which the valve member 18 is designed as a stepped piston.
  • the valve member 18 can be forced into an open position even under the pressure P1 when it is below the pressure P2 of the tire 13 up to a certain value. If the pressure P1 with a predetermined maximum difference under the pressure P2 in the tire 13, so there is an air drain from the tire 13 via the valve 17. If the pressure P1 is greater than the pressure P2 so there is an air flow and thus a filling of the tire. If the pressure P1 is lowered, for example to ambient pressure, the permissible maximum difference is exceeded and the valve member 18 moves into a blocking position and the tire pressure P2 is maintained.
  • Variant III illustrates a valve concept in which, similar to variant II, the pressure in tire 13 can be reduced by actuating pressure P1 to a level just below tire pressure P2. Deviating from the variant II, however, takes place here, the derivative of the tire air selectively into the environment.
  • the valve 19 shown here is constructed so that it comprises a valve member 20 which can be brought into three switching positions. In the first switching position, the valve is locked. This first switching position assumes the valve member 20 when the pressure P1 substantially corresponds to the ambient pressure, or at least is very low.
  • valve member 20 moves against the return force of a calibrated spring 21st
  • the valve member 20 reaches the Ablrawwolf shown here as soon as the pressure P1 is about o, 3 to o, 5 bar below the tire pressure P2. In this position, air flows out of the tire 13.
  • the valve member 20 moves into an end position in which the valve channel 22 communicates with the valve channel 23 and the discharge channel is closed. Now, the tire inflation gas, which is in any case at an elevated pressure level, can flow in the interior of the tire 13.
  • the pressurization of the system section S1 is terminated and the valve 19 passes through the return flow of the valve member in a safe lock state allows no airflow.
  • valve alternatives 12, 17, 19 described herein are preferably mounted in or on the pressure hoses, pressure pipes or pressure channels connecting the bearing to the tire. LIST OF REFERENCE NUMBERS
  • Wheel hub 14 Circuit a Running surface 15 Receiving circuit b Running surface 16 Outlet

Abstract

L'invention concerne un dispositif de guidage d'air destiné au guidage d'un gaz de gonflage de pneumatique dans une partie de système rotatif côté roue. Le dispositif de guidage d'air selon l'invention comprend un élément bague d'étanchéité, un premier ensemble lèvre d'étanchéité formé par l'élément bague d'étanchéité, un deuxième ensemble lèvre d'étanchéité formé par l'élément bague d'étanchéité, un espace annulaire délimité par l'élément bague d'étanchéité, et une paroi de bague formée par l'élément bague d'étanchéité, cette paroi s'étendant dans un espace intermédiaire entre les deux ensembles lèvres d'étanchéité et comprenant une face orientée vers l'espace annulaire et une face externe opposée à l'espace annulaire. Dans la paroi de bague est formée un structure de canal ou de vanne qui prend une position ouverte lorsqu'une pression minimale fixée par la conception du dispositif est développée dans la chambre annulaire.
PCT/DE2013/200092 2012-09-21 2013-08-02 Dispositif de guidage d'air destiné à la régulation de la pression de gonflage de pneumatique WO2014044259A1 (fr)

Applications Claiming Priority (2)

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DE201210217040 DE102012217040A1 (de) 2012-09-21 2012-09-21 Luftführungsanordnung zur Reifendruck-Regulierung
DE102012217040.5 2012-09-21

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WO2014044259A1 true WO2014044259A1 (fr) 2014-03-27

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107738546A (zh) * 2017-10-27 2018-02-27 李炼 旋转连接环
CN110914579A (zh) * 2017-07-24 2020-03-24 Nok株式会社 阀杆密封件
WO2022199751A1 (fr) * 2021-03-26 2022-09-29 Schaeffler Technologies AG & Co. KG Roulement de roue pour le montage d'un pneumatique de véhicule à moteur d'un véhicule à moteur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013017879A1 (de) 2013-10-28 2015-04-30 Gv Engineering Gmbh Wellendichtring
DE102017127427B3 (de) * 2017-11-21 2019-04-25 Gapi Technische Produkte Gmbh Dichtungsanordnung für eine Drehdurchführung eines Radlagers eines Kraftfahrzeugs
DE102021118902A1 (de) 2021-07-21 2023-01-26 Illinois Tool Works Inc. Drehübertragungsvorrichtung zum übertragen von steuer- und/oder arbeitsdrücken zu einem fluidkanal einer welle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3236636A1 (de) * 1982-10-04 1984-04-05 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Dichtung, insbesondere fuer waelzlager
US4804027A (en) * 1987-09-17 1989-02-14 Eaton Corporation Axle and wheel assembly
US5167419A (en) * 1991-10-22 1992-12-01 Freudenberg-Nok General Partnership Fluid seal with integral check valve
EP1147925A2 (fr) * 2000-04-19 2001-10-24 Firma Carl Freudenberg Dispositif d'étanchéité
DE102006006143A1 (de) 2006-02-10 2007-08-23 Schaeffler Kg Dichtungsanordnung für eine Reifendruck-Reguliereinrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3236636A1 (de) * 1982-10-04 1984-04-05 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Dichtung, insbesondere fuer waelzlager
US4804027A (en) * 1987-09-17 1989-02-14 Eaton Corporation Axle and wheel assembly
US5167419A (en) * 1991-10-22 1992-12-01 Freudenberg-Nok General Partnership Fluid seal with integral check valve
EP1147925A2 (fr) * 2000-04-19 2001-10-24 Firma Carl Freudenberg Dispositif d'étanchéité
DE102006006143A1 (de) 2006-02-10 2007-08-23 Schaeffler Kg Dichtungsanordnung für eine Reifendruck-Reguliereinrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110914579A (zh) * 2017-07-24 2020-03-24 Nok株式会社 阀杆密封件
CN107738546A (zh) * 2017-10-27 2018-02-27 李炼 旋转连接环
WO2022199751A1 (fr) * 2021-03-26 2022-09-29 Schaeffler Technologies AG & Co. KG Roulement de roue pour le montage d'un pneumatique de véhicule à moteur d'un véhicule à moteur

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