EP4326987A1 - Kolben, verdichter, druckluftversorgungsanlage, fahrzeug und verfahren zum betreiben einer druckluftversorgungsanlage - Google Patents
Kolben, verdichter, druckluftversorgungsanlage, fahrzeug und verfahren zum betreiben einer druckluftversorgungsanlageInfo
- Publication number
- EP4326987A1 EP4326987A1 EP22717841.5A EP22717841A EP4326987A1 EP 4326987 A1 EP4326987 A1 EP 4326987A1 EP 22717841 A EP22717841 A EP 22717841A EP 4326987 A1 EP4326987 A1 EP 4326987A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- sealing
- compressor
- ring
- retaining ring
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/143—Sealing provided on the piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/20—Other positive-displacement pumps
- F04B19/22—Other positive-displacement pumps of reciprocating-piston type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B25/00—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B25/00—Multi-stage pumps
- F04B25/02—Multi-stage pumps of stepped piston type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
- F04B39/0016—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons with valve arranged in the piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
Definitions
- the invention relates to a piston according to the preamble of claim 1 and a compressor, in particular a compressor, according to the preamble of claim 21.
- the invention also relates to a compressed air supply system, a vehicle and a method for operating a compressed air supply system.
- Compressors in particular piston compressors in vehicles of all kinds, are commonly known. They are used to provide compressed air and cover many areas of application, including brake systems, air spring systems, especially for level control, clutch boosters and many more. Important target criteria when designing compressors include the highest possible delivery capacity, the lowest possible noise development, the smallest possible dimensions, low manufacturing costs and high robustness.
- DE 10 2012 019 618 A1 discloses a method for positioning a piston with a peripheral seal in the form of a circular cup seal, in particular for use in a reciprocating piston compressor.
- DE 10 2011 121 750 A1 discloses a compressor having a piston whose piston head is rigidly connected to a connecting rod, with a connecting rod bearing eye of the connecting rod being rotatably mounted on an eccentric pin of a drive shaft of a drive motor.
- DE 10 2013 101 110 A1 discloses a reciprocating compressor with a piston which is driven via a slider crank mechanism and can be moved back and forth in a cylinder and is sealed off from the cylinder wall and which is arranged fixed to the connecting rod axis, the piston and/or the cylinder being designed in this way are that the crescent-shaped gaps between the edge of the piston and the cylinder wall that occur during the compression stroke due to the relative inclination or tilting between the piston and cylinder can be sealed, thereby compensating for leaks.
- a two-stage compressor can be designed in such a way that both compressor stages are formed by only one piston, for example by means of a piston that can be acted upon on both sides.
- GB 241,907 discloses a multi-stage compressor which can realize any number of compressor stages by means of a piston having any number of stage sections and a cylinder designed to match.
- DE 10 2010 054 710 A1 discloses a compressor for supplying compressed air to a compressed air supply system, which has at least one two-stage compressor unit with a single cylinder with a single piston that can be acted upon on both sides in a compression chamber of the cylinder.
- DE 10 2012 223 114 A1 also describes a double-piston compressor unit.
- a drive shaft of the motor of the compressor unit interacts with the unit via a link guide in the double piston in such a way that the double piston carries out a compression process alternately in the two cylinders of the unit.
- the axis of the drive shaft is arranged eccentrically to the central axis of the two cylinders, resulting in fewer changes in the position of the piston and thus less noise.
- the concept is still in need of improvement with regard to the disadvantages and target criteria mentioned above. It is therefore desirable to implement the function of a high-performance, in particular two-stage, compressor in a design that is as compact and robust as possible.
- the compressor 100 of WO 2018/197182 A2, already described here in this application with reference to Figures 1 and 2A, 2B, for a compressed air supply 10 of a compressed air supply system 200, for operating a pneumatic system 500, has a piston of the type initially mentioned kind
- the compressor 100 of WO 2018/197182 A2 has:
- first compression chamber 104 a first compression chamber 104, a second compression chamber 106, an air supply connection 120 and a compressed air outlet 124,
- a piston 1112 with a first end face 113 that can be pressurized, which is directed towards the first compression chamber 104, and a second end face 115, which can be pressurized, opposite the first end face 113 and which is directed towards the second compression chamber 106, the first compression chamber 104 being separated from the first end face 113 is delimited and the second compression chamber 106 is delimited by the second end face 115 of the piston 1112, the first end face 113 being a solid side 114 and the second end face 115 being a step side 116, and the piston 1112 being connected to a drive 102 via a connecting rod 128 is connected, where
- the first compression chamber 104 and the second compression chamber 106 are connected to one another via a connecting line 122 .
- the compressor 100 of WO 2018/197182 A2 provides that
- the connecting rod 128 is rigid, in particular rigid and joint-free, connected to the piston 1112 on a piston side 128.1 and is rotatably connected to a rotating part 131 of the drive 102 on a drive side 128.2, and
- the piston 1112 on the step side 116 carries at least one seal 138 which seals off the first compression chamber 104 and/or the second compression chamber 106 .
- the invention comes in, the object of which is to improve it Way to specify a device, in particular a piston and a compressor, and a method that at least partially meet the goals and target criteria formulated above, in particular through an improved structural design.
- the piston according to the invention is based on a piston for a compressor.
- a compressor has proven particularly useful for supplying compressed air to a compressed air supply system, for operating a pneumatic system, with the piston being designed to be movably guided in a cylinder of the compressor when the compressor is in operation and can be connected to a drive via a connecting rod, with the connecting rod is connectable to the piston on one side of the piston and is rotatably connectable to a rotating part of the drive on a drive side.
- such a piston has:
- first compression chamber can advantageously be delimited by the first end face and the second compression chamber can be delimited by the second end face of the piston.
- the invention also provides that the first compression chamber and the second compression chamber are connected to one another via a connecting line that can be pressurized.
- a compressor of claim 21 using the piston according to the invention namely a compressor, in particular a compressor, for supplying compressed air to a compressed air supply system, for operating a pneumatic system, having a first compression chamber, a second compression chamber , an air supply connection and a compressed air outlet, and the piston according to any one of claims 1 to 20.
- the compressor is provided with:
- the invention is based on the consideration that the basic approach of a piston, as described in the context of the compressor of WO 2018/197182 A2 with an already advantageous seal, is fundamentally important for the realization of a compressor with a first and second compression chamber Advantage provides the right approach. That is, the approach is to provide a seal that seals the first compression space from the second compression space, wherein the piston has a first face as a full face and a second face as a stepped face.
- the seal is advantageously designed to seal the second compression chamber from the interior of the crankcase and/or from the environment and/or to seal the first compression chamber from the second compression chamber.
- the at least one seal advantageously brings about a pressure-tight seal acting in the radial direction on the step side of the piston both on an outside and on an inside and is particularly advantageously formed by means of a single sealing body.
- a full face is to be understood as meaning a planar configuration of a first end face of the piston that extends essentially continuously over the cylinder cross section.
- a step side is to be understood as meaning a substantially ring-shaped configuration of the present second end side, i.e. which does not form the piston on the second end side so that it can be pressurized over the entire cylinder cross section, but instead, an annular space that can only be pressurized, in particular an annular space in the peripheral circumference of the second end face.
- the first end face is formed as a full side - there essentially dome-like design-, while the second end face as an annular surface arranged there essentially in a ring shape on the outer circumference is designed to form a step side.
- the step side could also only be designed in the form of a partial ring or an inner ring space.
- the step side could also have an inner full space, which is therefore not limited to a peripheral annular surface that can only be pressurized, as is explained in the exemplary embodiments of the present application.
- a step may refer to any smaller stepped formation of a pressurizable surface on the second face of the piston that is smaller than a full face of the first face of the piston.
- the essentially circular full side or the ring-shaped step side has proven to be pressurizable and sealable with a ring seal, which is conceptually in the foreground, as is the case in this application in Fig. 1, Fig. 2 and Fig .4 to Fig.8 is shown in the context of the preferred embodiments.
- the seal is already advantageously formed as such by means of a profiled ring-shaped seal body, which has a first annular lip running circumferentially an outside of the seal and a circumferential second annular lip on an inside of the seal.
- the sealing body therefore advantageously has a first or a second annular sealing lip on the outside or inside, on the one hand, for external sealing and, on the other hand, for internal sealing of the annular peripheral annular space on the step side of the piston, i.e. for sealing the second compression space against the first compression space.
- the invention has also recognized that, in order to achieve the object in an improved manner, it is advantageous for the ring-shaped sealing body to be formed as a sealing sleeve with a profile that is open in the circumferential cross-section with a profile base, the profile wall of which is formed by means of the first annular lip and the second annular lip is formed.
- the profile wall of the profile is advantageously formed by means of the first annular lip and the second annular lip;
- the profile according to the invention is open in the peripheral cross-section and in this respect has an optional profile base.
- the invention has recognized here that the circumferential cross section of the profile should always be open.
- the prior art follows the approach that the circumferential cross-section should also be provided with a sealing profile filling.
- the present invention follows a different finding; It is namely possible with a free-standing profile base, not only to fulfill the task in terms of a good seal, but also to use the open profile for an advantageous Hal sion of the sealing sleeve.
- the sealing sleeve with its profile base is held pressure-tight on the step side between a step-side piston ring arranged on the second end face and a compression space-side retaining ring.
- This feature takes advantage of the thus free-standing profile base of the open profile to hold the sealing boot at its profile base between a step-side piston ring and a compression-chamber-side retaining ring.
- the mounting of the sealing sleeve with its profile base between the step-side piston ring arranged on the second end face and the compression space-side retaining ring is also pressure-tight and in this respect provides a pressure-tight te design of the entire sealing arrangement with sealing sleeve, piston ring and retaining ring; So like a previously known full profile sealing body but now with improved structure and stability and mounting of the entire sealing arrangement. This significantly supports the longevity and pressure tightness of the sealing arrangement.
- the mounting of the sealing sleeve on its profile base between the step-side piston ring on the one hand and the retaining ring on the compression chamber side on the other hand results in a secure structural mounting and also a pressure-tight mounting, which avoids a pressure loss along the contact surface between the profile base, piston ring and retaining ring and on the other hand by the shape of the profile base as well which supports the sealing effect of the sealing lips.
- the invention leads to the solution of the object relating to the device also to a compressed air supply system of claim 24 and a vehicle with the compressed air supply system according to claim 25.
- the compressed air supply system according to the invention is designed to operate a pneumatic system with a compressor according to one of claims 21 to 23 and has:
- a pneumatic main line which is pneumatically connected to the compressor via a compressed air outlet and has an air dryer, to a compressed air connection of a gallery
- the object relating to the method is also achieved by a method of claim 26 using the piston according to the invention.
- the procedure for operating a compressed air supply system has the following steps:
- Pneumatic main line to a compressed air connection of a gallery, in particular via an air dryer.
- the first end face is formed as a solid side and the second end face is formed as a stepped side, with the piston carrying a sealing arrangement on the second end face, at least one seal which seals the first compression chamber from the second compression chamber.
- the seal is formed by means of a profiled annular seal body with a circumferential sealing first annular lip on an outer side of the seal and a circumferential sealing second annular lip on an inner side of the seal.
- the ring-shaped sealing body is formed as a sealing sleeve with a profile that is open in the circumferential cross-section and has a profile base, the profile wall of which is formed by means of the first annular lip and the second annular lip.
- a pressure-tight design of the holder of the profile base between the piston ring and the retaining ring can be expediently designed, as is preferably explained in the context of the further developments.
- a preferred design of the anchoring or notching or similarly reinforced connection between the profile base, piston ring and retaining ring is suitable for this purpose.
- a reinforced attachment of the profile base between the piston ring and the retaining ring preferably includes a surface contact of the profile base on a surface of the piston ring and a surface of the retaining ring, for example in the context of a socket, embedding.
- notch or guide elements can be provided, which engage in an impression or the like.
- the base of the profile or correspondingly fitting surfaces of the profile against the corresponding piston surface or retaining ring surface can be slightly curved and insofar leading and, moreover, nevertheless offer free space for a sealing lip movement.
- the outside of the seal, in particular of the sealing body is in continuous contact with an inner wall of the cylinder and the inside of the seal, in particular of the sealing body, is in continuous contact with a web wall inside of the cylinder.
- the seal has an annular sealing body with the first annular lip radially on the outside of the sealing body and a second annular lip radially on the inside of the sealing body.
- the seal has an annular sealing body with: the first annular lip, which is arranged in the radial direction on the outside of the sealing body, in the axial direction towards the second compression chamber, and/or with the second annular lip, which is arranged in the radial direction on the inside is arranged on the seal body directed in the axial direction towards the second compression space.
- the retaining ring rests in the open profile of the sealing sleeve.
- This has the advantage that the retaining ring can, so to speak, be fitted into the circumferential cross section of the open profile; insofar as the retaining ring essentially follows the open profile corresponding to the circumferential cross-section in order in its formation.
- the retaining ring can be rounded off in the above-mentioned manner on its base surface that rests on the profile base, on the one hand to enable the sealing lips to pivot, and on the other hand - like the base surface of the piston ring - to have further structural elements which seal the base surface of the retaining ring and implement the sealing of the piston ring to the profile base.
- the piston ring can have a quasi-summary base, which is curved or arched accordingly.
- the piston ring can have a substantially convex curvature on its base and the retaining ring can have a correspondingly concave curvature on its base, or vice versa, so that the profile base of the profile of the sealing sleeve is held between these convex or concave curved base surfaces, which may be provided with free space and match one another is.
- the sealing collar profiled in the circumferential cross-section can be formed with a free cross-section that is essentially U-shaped in the circumference, forming an open annular groove whose groove wall is formed by the first annular lip and the second annular lip.
- a so far U-shaped groove has proved to be particularly advantageous to accommodate the retaining ring.
- the first annular lip and the second annular lip can be formed in a preferred manner by means of the groove wall in order to form a pressure-tight radial sealing effect against a radial cylinder wall.
- the sealing sleeve can advantageously be formed in one piece.
- the sealing collar can have the profile base between a first annular lip and a second annular lip and at least one access opening can be formed in the profile base.
- the sealing sleeve can also be formed in several pieces.
- the sealing sleeve forms the profile base between a separate part with a first annular lip and a separate part with a second annular lip, leaving a gap to form a reach-through opening in the profile base.
- FIG. 7A, FIG. 7B A corresponding further exemplary embodiment is shown in FIG. 7A, FIG. 7B.
- the sealing collar has spaced-apart reach-through openings in the profile base, and the retaining ring is connected to the piston ring by means of the fixing elements.
- the fixing elements can in principle be advantageously designed as required in order to to connect the retaining ring to the piston ring by means of the fixing elements in such a way that the profile base between the piston ring arranged on the second end face on the step side and the retaining ring on the compression chamber side is held pressure-tight on the step side.
- the fixing elements can, for example, be made of metal or plastic or another suitable plastic. Provision can be made particularly advantageously for the fixing elements to generally reach through the openings in the sealing collar.
- the sealing sleeve it has proven to be advantageous for the sealing sleeve to have a number of reach-through openings in the profile base, which number corresponds to the number of fixing elements, with each fixing element reaching through a reach-through opening.
- one or more fixing elements can be formed on the piston ring or one or more fixing elements on the retaining ring or, in a further modification, one or more fixing elements can be formed on the piston ring and the retaining ring, e.g. B. integrally formed on one of these or both.
- the piston ring has a first number of fixing elements and the retaining ring has a second number of fixing grooves for realizing a connection, in particular a positive or non-positive connection, between the piston ring and the retaining ring;
- the first and second numbers are preferably the same, but do not necessarily have to be the same.
- a first number of fixing elements can be held in a common single annular groove or in a second number of fixing grooves, with each of the fixing grooves receiving exactly one fixing element.
- FIG. 4A, FIG. 4B which makes both modifications possible.
- a corresponding further exemplary embodiment is shown in FIG. 6A, FIG. 6B or FIG. 7A, FIG. 7B.
- the sealing sleeve has a corresponding number of openings for the number of fixing elements
- the piston ring has a number of fixing elements
- the retaining ring has the same number of fixing grooves for realizing a connection between the piston ring and the retaining ring.
- the retaining ring has a first number of fixing elements and the piston ring has a second number of fi- xiernuten has, for realizing a, in particular positive or non-positive, connection between the piston ring and the retaining ring.
- the first and second numbers are preferably the same, but do not necessarily have to be the same.
- a first number of fixing elements can be held in a common single annular groove or in a second number of fixing grooves, with each of the fixing grooves accommodating exactly one fixing element.
- a corresponding exemplary embodiment is shown in FIG. 5A, FIG. 5B.
- the sealing sleeve has a corresponding number of openings for the number of fixing elements
- the retaining ring has a number of fixing elements
- the piston ring has a number of a fixing groove for realizing a connection between the piston ring and the retaining ring.
- a fixing element can in principle be expediently designed in a variety of ways; a comparatively secure design of a fixing element can thus be realized in that the fixing element is formed as a clamping screw, with the clamping screw being screwed into a screw hole.
- a fixing element is formed as a clamping tooth.
- the clamping tooth is advantageously designed to be held on a clamping stop or in a clamping fit.
- a clamping tooth can have a web-like design and have a clamping element or clamping grid on one web flank.
- the number of clamping teeth and/or the number of clamping grooves and/or the number of access openings are advantageously arranged along the circumference of the piston ring and/or retaining ring and/or sealing element. In a particularly advantageous way, these are evenly spaced.
- a clamping tooth is advantageously clamped in a clamping groove or fixed by means of a press fit.
- a corresponding exemplary embodiment is shown in Figures 4A, 4B and 5A, 5B.
- a radially outer Surface and/or radially inner surface of a web flank of the clamping tooth with an opposite, radially outer surface and/or radially inner surface of a wall of a clamping groove via the radially inner and/or radially outer surfaces realize a friction fit of the clamping tooth in the clamping groove .
- a clamping tooth can reach through a clamping groove and be fixed by means of a clinch or rivet connection.
- a corresponding exemplary embodiment is shown in FIGS. 6A and 6B.
- a clamping tooth can have a latching element at a distal end, which has a clamping groove on a side facing away from the distal end and a corresponding undercut, for realizing a connection in the manner of a clinch or rivet connection.
- Special rivets such as small spiral rivets can also be used to advantage.
- the piston ring can be arranged in that, in a first modification, it is fastened to the second end face or, in a second modification, it is formed in one piece with it.
- it can be formed in one piece with the step side.
- it can be formed separately and suitably connected to the step side; e.g. B. glued, welded or such materially connected.
- the piston ring is advantageously designed as part of the piston directly on the piston and, according to the second modification, is advantageously firmly connected to it.
- At least one, in particular a number of one or more sealing webs are advantageously formed on the piston ring and/or on the retaining ring, preferably at least one surrounding sealing web is formed.
- a sealing web can be arranged on the side facing the sealing collar on the piston ring and/or a sealing web can be arranged on the side facing the sealing collar on the retaining ring.
- the sealing sleeve can thus be connected in a pressure-tight manner with its profile base to the piston ring and/or retaining ring.
- the sealing collar is also secured against an unintentional misalignment by means of a sealing web, ie at a position reliably predetermined by the sealing web Position held securely.
- a sealing web ie at a position reliably predetermined by the sealing web Position held securely.
- a first sealing web can be arranged radially on the inside and, comparatively, a second sealing web can be arranged radially on the outside relative to the fixing element.
- a number of sealing webs can generally preferably be offset in the radial direction, opposite one another, on the piston ring and retaining ring.
- at least two preferably circumferential sealing webs of the piston ring and/or the retaining ring are each arranged on the side facing the sealing sleeve.
- a sealing ridge on the retaining ring is a radially inner sealing ridge that is offset closer to the passage opening than a sealing ridge on the piston ring, which as a radially outer sealing ridge is offset further away from the passage opening.
- a sealing ridge on the retaining ring can be a radially outer sealing ridge that is offset closer to the passage opening than a sealing ridge on the piston ring, which, as a radially inner sealing ridge, is further away from the passage opening is offset.
- the sealing webs offset further away from the passage opening can be arranged on the piston ring and the sealing webs offset closer to the passage opening in comparison thereto can be arranged on the retaining ring.
- a sealing ridge on the retaining ring is a radially outer sealing ridge that is offset further away from the passage opening than a sealing ridge on the piston ring, which as a radially inner sealing ridge is offset closer to the passage opening in comparison.
- a sealing ridge on the retaining ring is a radially inner sealing ridge that is offset further towards the reach-through opening than a sealing ridge on the piston ring that acts as a radially outer sealing ridge compared closer to the reach-through opening.
- those further away from the access opening be arranged offset away sealing webs on the retaining ring and be arranged in comparison closer to the penetration opening towards the offset sealing webs on the piston ring.
- the piston ring and the retaining ring are each made of plastic; in particular, these are made of plastic.
- the piston ring and the retaining ring can also be connected to one another and/or to the sealing sleeve by means of an adhesive connection and/or ultrasonic welding connection.
- the retaining ring is formed by filling a preferably U-shaped annular space of the sealing sleeve with plastic.
- a preferably U-shaped groove can accommodate the retaining ring.
- the first annular lip and the second annular lip can be formed in a preferred manner by means of the groove wall in order to form a pressure-tight radial sealing effect against a radial cylinder wall.
- a holding connection between the piston ring and the sealing sleeve and the retaining ring can be formed in this modified development in an advantageous manner.
- a sealing web is designed in such a way that it is fully or partially pressed into the profile base of the sealing sleeve or in some other way penetrate into the base of the profile of the sealing sleeve or in its volume area when fixing the base of the profile between the base of the piston ring and the base of the retaining ring.
- a sealing web is designed with an appropriately pointed penetration side, ie advantageously a formed web edge towards the profile base of the sealing collar -for example, ideally in the form of a ridge.
- a hardness of the material, in particular of the plastic, of the sealing web is advantageously greater than a hardness of the material, in particular of the plastic, of the sealing sleeve or its profile base.
- the sealing web is generally and advantageously designed in such a way that it can deform the sealing sleeve in order to connect the sealing sleeve with its profile base in a pressure-tight manner to the piston ring and/or retaining ring; advantageous but does not cut or cut in order to maintain its consistency.
- Fig.1 is a pneumatic circuit diagram of a known pneumatic
- FIG. 2A shows a schematic sectional view of the compressor of FIG.
- FIG. 2B shows a schematic sectional representation of the compressor of FIG.
- WO 2018/197182 A2 is described in a first version, in a sectional view
- 3B shows a seal for a piston according to the prior art as in
- WO 2018/197182 A2 is described in a second version, in a sectional view
- FIGS. 2A, 2B shows a piston according to the concept of the invention in a first embodiment in a sectional view, shown in a compressor shown schematically as a double compressor based on the model of FIGS. 2A, 2B;
- FIG. 4B shows a detail of the piston of the first embodiment according to FIG. 4A
- FIG. 5A shows a piston according to the concept of the invention in a second embodiment in an exploded view
- FIG. 5B shows a detail of the piston of the second embodiment according to FIG. 5A in the area of the seal
- FIG. 6A shows a piston according to the concept of the invention in a third embodiment in an exploded view
- FIG. 6B shows a detail of the piston of the third embodiment according to FIG. 6A
- FIG. 7A shows a piston according to the concept of the invention in a fourth embodiment in a sectional view, shown in a partially shown compressor as a double compressor based on the model of FIGS. 2A, 2B;
- FIG. 8 shows a piston according to the concept of the invention in a fifth embodiment in a sectional view, also shown in an exploded view with screws and in an assembled perspective view for a compressor shown schematically as a double compressor based on the model of FIG. 2A, Figure 2B;
- FIGS. 9 shows a piston according to the concept of the invention in a sixth embodiment in a disassembled perspective view for a compressor shown schematically as a double compressor based on the model of FIGS. 2A, 2B;
- Fig. 11 A a vehicle of any type, such as. B. a car or a commercial vehicle such as a truck or a trailer (not shown), in a schematic representation with a known pneumatic system with a particularly preferred embodiment of a compressed air supply system of Figure 1, with a compressor as a double compressor with is formed in a single compression space, and in which a piston according to the concept of the invention is preferably used; the piston can be designed according to the concept of the invention in a first, second or third or fourth embodiment as shown in Figures 4A to 7C; 11B shows a vehicle in the form of a passenger car in a schematic representation with an electronically controlled air supply system (ECAS, Electronically Controlled Air Suspension), which is equipped with a particularly preferred embodiment of a compressed air supply system of FIG view is shown.
- ECAS electronically controlled air supply system
- Compressors according to the concept of the invention are preferably used in a compressed air supply system - special requirements in terms of compression capacity and compactness have arisen here.
- a compressor according to the concept of the invention can also be used for other types of compressed air sources. It is also to be understood that the compressor can be used not only preferably in compressed air supply systems or for passenger cars or commercial vehicles. In addition, there have also been applications for vacuum generators, in particular vacuum pumps.
- a compressed air supply system is shown as an example of a preferred embodiment in FIG. 1 and is described below.
- Fig. 1 shows a pneumatic system 300 with a compressed air supply system 200 and a pneumatic system 500, presently in the form of an air spring system, of a vehicle 400, not shown in detail.
- the air spring system is formed with an exemplary number of four air springs 210, each air spring 210 being assigned to a wheel of a vehicle 400, not shown in detail.
- a support 410 formed near the wheel of the vehicle 400 is shown here only symbolically, which can be raised when the air spring 210 is filled or lowered when the air spring 210 is vented.
- An air spring 210 includes air bellows, referred to here as bellows 211, for receiving compressed air and an air spring valve 212, which holds or releases the amount of compressed air in the bellows 211 or allows the bellows 211 to be filled with compressed air.
- the air spring valve 212 is designed as a controllable solenoid valve, here as a 2/2-way valve.
- Each of the air spring valves 212 is shown here in a normally closed state by the spring force of a spring that is not specified.
- the air spring valves 212 are connected to a gallery line 220 designed as a collecting line via suitable spring branch lines 221 .
- a voltage-pressure sensor 230 Directly connected to the gallery line 220 is a voltage-pressure sensor 230 which is able to measure egg pressure in the gallery line 220 - and with suitable switching of the air spring valves 212 - also a pressure in the air springs 210 to measure.
- the voltage-pressure sensor 230 can also measure a memory pressure in connection with a memory system, namely the memory 224 in this case, the pneumatic line 40 and the memory valve 41 .
- Pressure sensor signals can be transmitted to an air spring controller and/or a vehicle controller to initiate further control measures, which is not shown in detail here.
- the pneumatic system 500 in the form of the air spring system is supplied with compressed air from the compressed air supply system 200.
- the pneumatic system 500 is connected to the compressed air supply system 200 via a compressed air connection 2 .
- Compressed air can be supplied to the compressed air connection 2 from a compressed air supply 10 with a compressor 100 via a main pneumatic line 30 .
- Compressed air from a pressure medium reservoir 224 can also be supplied to the compressed air connection 2 via a further compressed air connection 2 ′ and a further pneumatic line 40 .
- the compressed air supply system 200 has suitable separating valves, namely a first separating valve 31 in the pneumatic main line 30 and a second separating valve 41 in the further pneumatic line 40, for the appropriate selection of the type of supply of compressed air to the pneumatic system 500.
- the first and second separating valve 31, 41 is each designed as a controllable solenoid valve—here as a 2/2-way valve.
- the first and second isolating valve 31, 41 are each shown in a closed state, so that the pneumatic system 500 is completely separated from the compressed air supply system 200.
- the compressed air supply system 200 has a compressed air supply 10 to which the main pneumatic line 30 is connected.
- the air dryer 222 is on the compressed air supply side and on the compressed air connection side the first isolation valve 31 is pneumatically connected in series.
- a valve arrangement designed as a pneumatic parallel circuit is connected between the air dryer 222 and the first isolating valve 31 .
- the valve arrangement has a check valve 32 which opens automatically in the ventilation direction B to the pneumatic system 500 and blocks the air dryer 222 in the ventilation direction E from the pneumatic system.
- a throttle 34 is arranged, which serves as a regeneration throttle with bidirectional flow.
- the throttle 34 has a nominal width that is sufficient to provide such a pressure drop when the pneumatic system 500 is vented when the first separating valve 31 is open that an air dryer 222 regenerates sufficiently as part of a pressure swing adsorption.
- a compressed air flow guided in the venting direction E can be vented to the environment U via a vent line 35 connected to the pneumatic main line 30 to a vent connection 3 .
- a further separating valve 36 to be opened for a venting process is arranged in the venting line 35 .
- the further separating valve 36 is designed as a controllable magnetic valve, specifically here as a 2/2-way valve.
- a fundamentally different design of the main pneumatic line 30 and vent line 35 can also be provided, e.g. B. Chen with a suitable pilot operated vent solenoid valve assembly or the like.
- the compressed air supply 10 has a compressor 1100 designed according to the concept of the invention, which is described below with reference to the particularly preferred embodiment shown by way of example in FIG. 1, FIG. 2A and FIG. 2B.
- the compressor 1100 of the compressed air supply 10 is formed with the compressed air supply 10 in the present case as a device that can be connected separately to the compressed air supply system 200 .
- the component of the compressed air supply 10 that can be designated as a compressed air supply device has a compressed air outlet 124 to which the main pneumatic line 30 of the compressed air supply system 200 can be connected. Furthermore, the compressed air supply tion 10 has a charging connection 126 to which a pneumatic line 37 to the pressure medium reservoir 224 can be connected via yet another separating valve 38 .
- the pressure medium reservoir 224 is connected to the pneumatic line 37 via the second compressed air connection 2' mentioned above.
- the further pneumatic line 40 to the compressed air connection 2 is also connected to the second compressed air connection 2'.
- the pneumatic line 37 is - when the further separating valve 38 is open - only unidirectionally through which compressed air can flow, namely in a further venting direction E' as seen from the pressure medium supply tank 224 .
- the pneumatic line 37 has a further check valve 39 which automatically opens in the further venting direction E' and blocks in the opposite direction.
- the pneumatic line 37 is thus designed to supply compressed air from the pressure medium reservoir 224 to the charging connection 126 of the compressed air supply 10 when the still further separating valve 38 opens.
- the compressed air supply 10 has an air supply connection 0, via which air from an air supply L—filtered in a filter 52 of an intake line 51—can be supplied.
- the compressor 1100 of the compressed air supply 10 is designed with a first compression space 104 and a second compression space 106 .
- the compressor 1100 is designed with a single cylinder 118, as described in more detail in FIGS. 2A and 2B.
- a single inside the cylinder 1118 on both sides pressurizable Kol ben 1112 of the compressor 1100 is driven to move by a motor M via a drive shaft 102 to.
- the cylinder 1118 with the piston 1112 of the compressor 1100 is presently arranged on a single side of the motor M, forming both compression chambers 104 and 106; arranged on a single side of the drive shaft 102 in particular.
- this is a particularly compact arrangement of cylinder 1118 utilizing a single piston 1112.
- the compressed air supply or the compressor 1100 has a connecting line 122 between the first compression space 104 and the second compression space 106 .
- the connecting line 122 is formed as a passage through a piston body of the piston 1112 and is therefore of particularly compact design. Due to the comparatively short connecting line 122, the entire compression space in the cylinder 1118 is kept small, so that a particularly high compression pressure amplitude can be achieved.
- the availability of compressed air i. H. in particular an amount of compressed air
- compressed air i. H. in particular an amount of compressed air
- FIG. 2A shows a compressor 1100 according to a preferred embodiment in a first sectional view.
- a piston 1112 is disposed within a cylinder 1118 in a cylindrical cavity.
- Piston 112 is connected via a rigidly connected connecting rod 128 via a rotatable connection 162 about an axis of rotation running through point S2 perpendicular to the plane of section to an eccentrically arranged shaft section 132, which in turn is connected to a drive shaft 102 in order to transmit the drive movement.
- Piston 1112 and connecting rod 128 are present in one piece, in particular assembled coaxially along a common piston axis A, executed.
- the piston 1112 is white terhin - shown highly schematic - as well as other areas of this view.
- the design of the piston 1112 can deviate from the design shown here--particularly in order to implement functionally-related wobbling kinematics.
- Such deviating developments are shown in FIG. 3A, FIG. 3B and, relating to the concept of the invention, in FIG. 4A.
- the rotatable connection 162 is realized via a connecting rod bearing 152 .
- the drive shaft 102 and the eccentrically arranged shaft section 132 are part of a rotating part 131 of the drive.
- the connecting rod 128 has a piston side 128.1 facing the piston 1112 and a drive side 128.2 facing the drive shaft 102.
- the drive shaft 102 in turn executes a rotational movement D about an axis of rotation running through a point S1 perpendicular to the plane of section. Due to the rigid connection of the drive shaft 102 to the eccentrically arranged shaft section 132 and the offset of the two points S1 and S2, a rotational movement of the drive shaft 102 leads to a deflection H of the piston in the stroke direction.
- a rotationally symmetrical cylinder inner web 110 which extends radially inwards from the cylinder inner wall 119 and has an L-shaped cross section. Due to the L-shaped cross section, the cylinder inner web 110 has on its inside a web wall 111 directed in the direction of the piston 1112 .
- a ringför miger in the direction of the piston 1112 open space is formed, which is the second compression space 106 Ver.
- the piston 1112 On the side facing away from the connecting rod 128 , the piston 1112 has a first end face 113 embodied as a full face 114 which, together with the inner wall of the cylinder 1118 , delimits the first compression space 104 .
- the piston 1112 has an annular piston step on the side facing the connecting rod 128, which is formed in the form of a hollow cylinder, the outer wall of which is congruent with the outer wall of the piston 1112 at the level of the full side 114 and which is on the opposite side of the full side 114 Side of the piston 1112 is closed off by a second face 115 designed as a step side 116 .
- the cylinder 1112 is designed in such a way that the piston 112, in particular the side facing the connecting rod 128 with the step side 116, can move in an oscillating manner within the annular space formed by the cylinder inner web 110 and the inner wall of the cylinder 1118.
- the second compression chamber 106 is formed by delimiting the practically ring-shaped space formed by the inner cylinder web 110, the inner wall of the cylinder 1118 and the step side 116.
- the piston 1112 also has a seal 138, shown schematically here, which in the embodiment shown schematically here as well as in the preferred embodiments of FIGS Stage side 116 of the piston 1112 is arranged.
- the seal 1138 in the sense of a sealing arrangement according to the concept of the invention - as it is shown in relation to the preferred embodiments of FIGS of the compression chambers 104, 106 in relation to a crankcase interior 160.
- the seal 1138 basically has an outside 1138.1 and an inside 1138.2.
- the outside 1138.1 of the seal 1138 is arranged on the outer circumference, i.e. the outside of the - to put it simply - ring-shaped seal 1138 as part of a sealing arrangement to be explained below and thus provides circumferential, constant contact with a cylinder inner wall 119, which in particular forms a cylindrical cavity , here.
- the inner side 1138.2 of the seal 1138 is on the inner side, ie on the inner circumference of the--to put it simply--annular seal 1138 and thus produces a circumferential, constant contact with a web wall inner side 109.
- FIG. 2A the relative inclination of the piston 1112 and the connecting rod 128, which is rigidly connected to the piston 1112, to the cylinder 118 can also be seen.
- This inclination is caused by the portion of the offset perpendicular to the stroke direction between the axis of rotation of the drive shaft running through point S1 and the axis of rotation of the rotary motion between connecting rod 128 and eccentrically arranged shaft section 132 running through point S2.
- This portion existing perpendicular to the stroke direction of the offset depends on the angular position of the drive shaft 102 or the eccentrically arranged shaft section 132.
- the seal 138 is designed accordingly. This includes adequate dimensioning and elastic behavior of the seal 1138, so that even if there are openings between the piston 1112 and the cylinder 1118 due to the wobbling movement, the compression chambers 104 and 106 remain sealed.
- FIG. 2B shows another sectional view of a preferred embodiment of a compressor in a sectional plane parallel to both the drive axis and the piston axis A.
- the sectional view shows how air is discharged via an air supply connection 120 arranged inside the piston 1112 and the connecting rod 128 from the environment U or the crankcase interior 160 can reach the first compression chamber 104 .
- an air supply valve flap 142 arranged on the full side 114 of the piston 112 ensures that air can flow via the air supply connection 120 only into the first compression chamber 104, but not out. This is achieved in that the air supply valve flap 142 closes against the increasing pressure in the first compression chamber 104 when the first compression chamber 104 is reduced by the deflection H and the associated compression of the air therein.
- the air supply valve flap 142 opens when the first compression chamber 104 is enlarged due to the negative pressure in the first compression chamber 104 relative to the environment, so that air from the environment or the crankcase interior 160 flows into the first compression chamber 104 .
- a check valve 130 is arranged inside the piston 1112 as a further connection between the first compression chamber 104 and the air supply connection 120 or the crankcase interior 160, which is activated by a spring is held closed by force F.
- the check valve 130 allows air in the first compression chamber 104, the pressure of which exceeds a specific maximum value that is potentially harmful to the compressor, to escape via the air supply connection 120 into the environment.
- the check valve 130 can also be arranged in such a way that the air escapes directly, ie without being routed via the air supply connection 120, into the crankcase interior 160 or the environment U.
- a connecting line 122 is arranged inside the piston 1112 between the first compression chamber 104 and the second compression chamber 106 .
- This connecting line 122 represents a gas-carrying connection between the two compression chambers 104 and 106.
- it has a connecting valve flap 144, analogous to the air supply valve flap 142, which ensures that air flows through the connecting line 122 in only one direction, namely from the first compression chamber 104 to the second compression chamber 106.
- the connecting valve flap 144 closes when the second compression chamber 106 decreases against the increasing pressure and opens when it increases, so that air can flow from the first compression chamber 104 into the second compression chamber 106.
- the air compressed in the second compression space 106 can be made available via a compressed air outlet 124 to consumers of a pneumatic system 500, in particular via a compressed air supply system 200.
- a charging connection 126 leading to the second compression chamber 106 is arranged in the cylinder 1118 and has a charging valve flap 146 .
- the second compression chamber 106 can be supplied with air which, for example, was compressed at a previous point in time and is stored and held available in a pressure medium reservoir 224.
- the charging valve flap 146 ensures that air flows exclusively into the second compression chamber 106 via the charging connection 126 and cannot escape via the charging connection 126 .
- the piston 1112 does not have a cylindrical shape, but rather a variable cross section along a piston axis A.
- the Piston 1112 at the level of full side 114 has a cross section with an additional piston diameter KN.
- the piston 1112 On the stepped side 116, however, the piston 1112 has a main piston diameter KH that is larger than the secondary piston diameter KN. Due to these different diameters and the course of the piston diameter between the step side 116 and the solid side 114, there is a changeable, essentially non-cylindrical course both on the outside 1112.1 and on the inside 1112.2 of the piston 112, which means that the Piston 1112 is practically dome-shaped. Such a design in particular allows the piston 1112 to move within the cylinder 1118, in particular despite the wobbling movement of the piston 1112.
- the main piston diameter KH cannot be larger than the diameter of the cylinder 118, but it is possible and even useful if the diameter of the outside 138.1 of the seal 138 is larger than the main piston diameter KH and also than the diameter of the cylinder 118. In this way enables the piston 1112 together with the seal 138 to create a seal between the first compression chamber 104 and the second compression chamber 106, despite the wobbling movement of the piston 1112 and the resulting openings and gaps between the piston 1112 and the cylinder 1118 or the piston 1112 and the web wall 111 or between tween the second compression chamber 106 and the crankcase interior 160 produces.
- the movement of the piston 1112 is not significantly impeded or blocked since the seal 1138 of the sealing arrangement according to the concept of the invention is preferably formed from an elastic material.
- the shape of the piston 1112 is practically domed, so that the piston is formed to match a domed portion 164 of the cylinder 1118 .
- the piston 1112 has an outside 1112.1 and an inside 1112.2.
- the seal 138 with an outer side 138.1 and an inner side 138.2 is also clearly visible.
- the outside 138.1 is here over the outer circumference of the seal 138 circumferentially a cylinder inner wall 119 in contact, so that a pressure-tight seal against a first compression chamber 104 is effected.
- the inner side 138.2 of the seal 138 is in contact all the way around the inner circumference of the seal 138 with a web wall inner side 109, so that a pressure-tight seal with respect to a crankcase interior 160 is effected.
- the piston 1112 in particular the dome section 164 of the piston 1112, is fastened to a connecting rod 128 by means of a piston screw 166. Only the piston side 128.1 of the connecting rod 128 is visible in the present view.
- a check valve 130 an air supply connection 120, a connecting line 122, an air supply valve flap 142, a connecting valve flap 144, a charging valve flap 146 and a compressed air outlet 124 and a charging connection 126 can be provided.
- These features essentially correspond to the features already shown symbolically in FIG. 2B.
- the air supply valve flap 142 and the check valve 130 may not be connected together to an air supply connection 120 guided by a connecting rod 128, as shown in FIG. 2B, but are arranged separately in the piston 1112 and carry gas connected to a crankcase interior 160 - or connected in the check valve 130 depending on the spring force - are.
- connection line 122 ensures that the first compression chamber 104 and the second compression chamber 106 are connected in series - generally in the sense of a series connection of two compressor stages of a multi-stage compressor - it should nevertheless be understood that the concept of Invention is not limited thereto.
- the concept of the invention can also be implemented in a multi-stage compressor whose two or more compressor stages are implemented in the sense of a parallel connection—generally in the sense of a parallel connection of two compressor stages of a more cylinder compressor.
- FIG. 3A shows a first version of a seal 138a, known per se from WO 2018/197182 A2, which essentially corresponds to a previously described seal 138.
- the seal 138a includes a seal body 139a, which has a first annular lip 139.1a and a second annular lip 139.2a.
- the first annular lip 139.1a is arranged on the outside of the sealing body 139a in a radial direction RR in such a way that it extends in an axial direction RA in the direction of a second compression space 106 .
- the first and/or second annular lip 39.1a, 139.2a has in particular a free end which is arranged in the second compression chamber 106.
- the second annular lip 139.2a is arranged on the inside of the sealing body 139a in a radial direction RR. It also extends in an axial direction RA toward the second compression space 106.
- the seal body 139a is attached to a step side 116 of a piston 1112. As shown in FIG.
- FIG. 3B shows another version of a seal 138b known per se from WO 2018/197182 A2.
- the main difference between the seal 138b and the seal 138a shown in FIG. 3A is that a seal body 139b of the seal 138b - in addition to a first annular lip 139.1 b and a second annular lip 139.2b - has an additional third annular lip 139.3b which is in a radial direction RR on the outside of the seal body 139b and directed toward the first compression space 104 in an axial direction RA.
- the third ring lip 39.3b has in particular a free end which is arranged in the first compression chamber 104.
- the seal 1138 of the sealing arrangement according to the concept of the invention proves to be further improved in order to realize a function of an efficient, in particular two-stage, compressor in a design that is as compact and robust as possible.
- a piston in Fig. 4A to Fig. 10B are preferably designed for a compressor 1112, in particular a compressor, for a compressed air supply 10 of a compressed air supply system 1100 as shown in Fig. 1, or for operating a pneumatic system 500 such as that of Also shown in FIG. 11 B in relation to a compressed air supply system of FIG. 11 A.
- FIGS. 4A and 4B show in detail a particularly preferred first embodiment of a sealing arrangement 1001 with an annular sealing body 1139 as a sealing collar 1021, a compression space-side retaining ring 1031 in the sealing collar and a step-side piston ring 1011; this for attachment to a second end face 115 of the piston 1112 designed as a stepped side 116.
- the piston 1112 is shown here in a cylinder 1118 shown schematically with a cylinder inner wall 119 shown schematically.
- the first end face 113 is embodied as a full face 114 .
- the piston 1112 in the cylinder 1118 is shown schematically in FIG are sealed from each other via the sealing arrangement 1001 according to the first embodiment.
- 1005 implement the following features, explained as examples for the first sealing arrangement 1001, in a type of sandwich structure.
- the sealing arrangement 1001 has the sealing sleeve 1021, which is profiled as a circumferential cross section, between the step-side piston ring 1011 and the retaining ring 1031 on the compression chamber side.
- the sealing arrangement 1001 according to the first and further embodiments thus has a step-side piston ring 1011 and, to form the ring-shaped seal body 1139, a sealing sleeve 1021 and retaining ring 1031 according to the first embodiment.
- the sealing arrangement 1001 according to the first preferred embodiment is shown in detail in FIG. 4B.
- the ring-shaped sealing body 1139 of the sealing collar 1021 forms the previously explained first annular lip 1139.1 on an outer side 1138.1 of the seal 1138 and the second annular lip 1139.2 on the inner side 1138.2 of the seal 1138.
- the sealing collar 1021 is thus formed as an annular sealing body 1139, with a circumferential cross-section shown in Figure 4B, which forms the open profile 1020 recognizable; the opening 1140 in the profile is essentially rectangular, with the first and second annular lips 1139.1, 1139.2 merging into the profile base 1139.3 with a rounding 1141.
- the profile wall of the profile 1020 provided with the profile opening 1140 is thus formed by means of the first and second annular lip 1139.1, 1139.2 and merges into the profile base 1139.3 in a rounded manner. This is the case over the entire circular ring circumference of the sealing collar 1121 .
- the sealing sleeve 1021, 1022, 1023 As in the other embodiments of the sealing arrangement 1001, 1002, 1003, 1004, the sealing sleeve 1021, 1022, 1023,
- Fig.10B- it can be seen for all embodiments of the sealing arrangement 1001, 1002, 1003, 1004, 1005, 1006 in relation to the profile base 1139.3 of the profile 1020 that this is between a concavely curved adjoining sealing side 1010 of the piston ring, 1011, 1012, 1013 and a matching convex holding side 1030 of the retaining ring are held.
- the rounding 1141 of the profile opening 1140 gives the transition of the sealing lips 1139.1,
- the profile base 1139.3 is made soft or elastic in the material in such a way that the sealing webs 1119 designed here as sealing edges can be accommodated.
- the sealing webs 1119 are pressed into the profile base 1139.3 when the profile base is fixed between the base of the piston ring 1011, 1012, 1013 and the base of the retaining ring 1031, 1032, 1033.
- the sealing webs 1119 serve to improve the sealing of the sealing sleeve 1021, 1022, 1023, 1024 at their profile base 1139.3 between the sealing side 101 ⁇ of the piston ring 1011, 1012, 1013 and the holding side 1030 of the retaining ring 1031, 1032, 1033.
- the profile base 1139.3 likewise in all embodiments of the sealing arrangement 1001, 1002, 1003—has passage openings 1116 spaced apart along the annular circumference of the sealing sleeve.
- two small sealing edges are formed as small triangles on the piston ring 1011, 1012, 1013 and on the retaining ring 1031, 1032, 1033, which extend into the profile base 1139.3 of the profile 1020 of the sealing sleeve 1021, 1022, 1023, 1024 should press in and thereby support the seal.
- Piston and retaining ring are made of aluminum and should be sealed with the sealing edges.
- the sealing webs are realized on the outside as 1119.A and on the inside as 1119.1 to increase the sealing effect; this, as previously explained, with said sealing webs 1119.A or 1119.1, in each case from the side of the piston ring 1011, 1012, 1013 or of the retaining ring 1031, 1032, 1033. That is, a first sealing ridge 1119.1 is provided radially inward and a second sealing ridge 1119.A is provided radially outward with respect to the aforesaid sealing opening 1116.
- a first radially inner sealing web 1119.1 is provided on each piston ring 1011, 1012, 1013 and retaining ring 1031, 1032, 1033; if necessary, it can also be provided only on a piston ring or only on a retaining ring.
- a second sealing web 1119.A can be provided radially on the outside on the piston ring 1011, 1012, 1013 and retaining ring 1031, 1032, 1033, or only on the piston ring or only on the retaining ring.
- the formation of two circumferential sealing webs 1119.A or two circumferential sealing webs 1119.1 has proven to be advantageous, so that the piston ring 1011, 1012, 1013 has two circumferential sealing webs 1119.1, 1119.A and the retaining ring 1031, 1032, 1033 also has two circumferential sealing webs 1119.1, 1119.A, one of the circumferential sealing webs 1119.1, 1119.A being arranged radially inside the through-openings 1116 or radially outside of the through-openings 1116.
- the sealing webs 1119.1 running radially inward are offset from one another, with the sealing web 1119.1 of the retaining ring 1031, 1032, 1033 being offset slightly outwards radially, i.e. closer to the access opening 1116.
- the sealing ridge 1119.1 of the piston ring which runs radially inwards, is offset somewhat radially inwards compared to the sealing ridge 1119.1 of the retaining ring.
- both sealing webs 1119.1 are only offset from one another with their apex ridges to such an extent that they still overlap; In the present case, the crest ridge of one sealing ridge 1119.1 lies opposite a flank of the other sealing ridge 1119.1.
- a sealing ridge 1119.A of the retaining ring is radially offset slightly closer to the access opening 1116, i.e. radially offset more inwards, in comparison to the sealing ridge 1119.A of the piston ring, which is radially offset slightly outwards.
- Both sealing webs 1119.A overlap insofar as their apex ridges are each arranged opposite a flank of the opposite sealing web 1119.A.
- This arrangement of the sealing webs 1119.A 1119.I is implemented—also in all three embodiments of the sealing arrangement 1001, 1002, 1003, 1004 in the same way—to increase the sealing effect on the profile base 1139.3 of the sealing sleeve between the piston ring and the retaining ring.
- a sealing bar 1119.A 1119.1 is designed in such a way that it fully or partially presses into the profile base 1139.3 of the sealing collar 1011, 1012, 1013 or in some other way can penetrate into the profile base 1139.3 of the sealing collar 1011, 1012, 1013 or into its volume area Fixing the profile base 1139.3 between the base of the piston ring 1011, 1012, 1013 and the base of the retaining ring 1031, 1032, 1033.
- a sealing ridge is designed with an appropriately pointed penetration side, i.e. advantageously a formed ridge edge towards the profile base of the sealing sleeve - for example on the Best in the manner of a ridge z.
- a hardness of the material, in particular of the plastic, of the sealing web is advantageously greater than a hardness of the material, in particular of the plastic, of the sealing sleeve or its profile base.
- the sealing web 1119, 1119.A 1119.1 is generally and advantageously designed in such a way that it can deform the sealing sleeve in order to connect the sealing sleeve with its profile base 1139.3 to the piston ring and/or retaining ring in a pressure-tight manner; beneficial but not cutting to maintain their consistency.
- the passage openings 1116 are presently formed in the profile base 1139.3 for the passage of a fixing element, which, like the number of passage openings 1116 in the profile base, are arranged around the circumference of the retaining ring and/or piston ring.
- a fixing element can in principle be designed in any suitable way as a rounded, oval or also circumferentially more or less wide peg, pin, pen or, in contrast, comparatively broader, partially or fully circumferential web.
- the retaining ring 1031, 1032, 1033, 1034 or piston ring 1011, 1012, 1013, 1014 thus has - in both cases or alternatively only one, or alternatively - preferably a fixing element 1113 for each passage opening 1116, so that the retaining ring 1031, 1032 , 1033 is connected to the piston ring 1011, 1012, 1013, 1014 with the fixing elements 1113 passing through in this way; i.e. H. Due to the reach-through openings in the sealing collar, the sealing collar 1121, 112, 1123 is also held on the profile base 1139.3 between the piston ring and the retaining ring in a twist-proof manner.
- the fixing pins seen in FIGS. 5A, 5B and 6A, 6B, 7A, 8, 9 lock as a fixing element 1113 due to their limited circumference Expansion and fitting into the reach-through openings 1116 the parts of the sealing arrangement 1001, 1002, 1003, 1004, 1005, 1006; ie the piston ring 1011, 1012, 1013, 1014, 1015, 1016, the sealing boot 1021, 1022, 1023, 1024, 1025, 1026 and the retaining ring 1031, 1032, 1033, 1034, 1035, 10301, 10301, 10301, 10301, 1030 1004, 1005, 1006 are held against each other so that they cannot rotate.
- the additionally effected clamping effect is explained below and results in the sealing arrangement 1001, 1002, 1003, 1004, 1005, 1006 also holding onto one another in their sandwich structure.
- the fixing elements 1113 can be implemented in different ways in terms of their design or attachment to the retaining ring and/or piston ring.
- the sealing sleeve 1021, 1022, 1023, 1024, 1025, 1026 has a corresponding number of access openings 1116 for the number of fixing elements 1113
- this can certainly also be realized differently.
- the piston ring 1011, 1013, 1015 (Fig. 4A/Fig.4B and Fig.6A/Fig.6B) can have fixing elements 1113
- the retaining ring 1032, 1034 (Fig.5A/Fig.5B, Fig.7A, Fig .9) have fixing elements 1113; the fixing element 1113 can also be formed separately as shown in FIG.
- the retaining ring 1031, 1033 can have a receptacle—such as a groove in the retaining ring 1031 or a passage as in the retaining ring 1033—for a fixing element 1113 have.
- the piston ring 1012, 1014, 1015 can have a receptacle, such as a groove for a fixing element 1113, in accordance with the embodiment of FIGS. 5A, 5B, 7A, 8.
- Corresponding recordings, such as a groove or a passage, are marked accordingly with the reference number 1114 .
- the fixing elements 1113 are arranged along the circumference of the piston and retaining ring and/or the piston ring or retaining ring, spaced evenly along the ring circumference.
- the fixing elements 1113 are shown and designed here as clamping teeth or short bars or pins.
- the fixing elements can also be formed as a number of clamping screws.
- the receptacles 1114 are shown and designed as clamping grooves or similar receptacles for the fixing elements 1113 .
- the receptacles 1114 can also be formed as screw holes - this will be described with reference to FIG.
- the design of the fixing elements as clamping teeth shown here has proven to be advantageous compared to the use of clamping screws for the fixing elements, since locking the clamping teeth 1113 in a clamping groove or bore or similar receptacle 1114, as explained below, can be implemented particularly advantageously.
- the clamping tooth as the fixing element 1113 is integrally formed on the piston ring 1011 .
- the fixing element 1113 reaches through the reach-through opening 1116 on the profile base 1139.3 of the sealing sleeve 1021 and is laterally-that is, on its sides 1117.A, 1117.1-with the flanks 1114.A, 1114.1 of the receptacle 1114 clamped.
- the fixing element 1113 designed as a clamping tooth is clamped on its sides 1117.A, 1117.1 by flanks 1114.1, 1114.A of the receptacle 1114.
- FIG .R can reach behind an undercut 1117.H on the retaining ring 1033.
- FIG. 7A shows a perspective sectional view of a piston 1112 for a compressor 1100 according to the concept of the invention in a fourth embodiment; dar- placed in a partially shown compressor 1100 as a double compressor based on the model of the embodiment of FIGS. 2A, 2B.
- the illustrated sealing arrangement 1004 has a sealing collar 1024 with a profiled circumferential cross section between the piston ring 1014 on the step side and the retaining ring 1034 on the compression chamber side.
- the sealing arrangement 1004 according to this fourth embodiment thus has a step-side piston ring 1014, and to form the annular seal device body 1139 a sealing sleeve 1024, and a retaining ring 1034 according to the fourth embodiment.
- the ring-shaped sealing body 1139 of the sealing collar 1024 forms the previously explained first annular lip 1139.1 on an outside 1138.1 of the seal 1138 and the second annular lip 1139.2 on the inside 1138.2 of the seal 1138. Also present is the sealing sleeve 1024 as an annular sealing body 1139, formed with a circumferential cross section shown in FIG. 7B, which forms the open profile 1020 as can be seen.
- the opening 1140 in the profile can also be seen here as being essentially rectangular, with the first and second annular lip 1139.1, 1139.2 each merging into the profile base 1139.3 with a rounding 1141.
- the profile wall of the profile 1020 provided with the profile opening 1140 is thus formed by means of the first and second annular lip 1139.1, 1139.2 and merges into the profile base 1139.3 in a rounded manner. This is also the case with the sealing sleeve 1024 over the entire circular ring circumference.
- sealing arrangement 1004 is also present in the sealing arrangement 1004—as in the previously explained embodiments of a further sealing arrangement 1001, 1002, 1003—is the profiled sealing sleeve 1141—d. H. as well as the other embodiments of the sealing collar 1021, 1022, 1023- formed with a free cross-section of the profile opening 1140 that is essentially U-shaped in the circumference; i.e. H. forming an annular groove that is open to this extent, ie open to the second compression chamber 106, the groove wall of which is formed by means of the aforementioned first and second annular lip 1139.1, 1139.2 and the base of which is formed by the aforementioned profile base 1139.3.
- the sealing collar 1024 between a step-side piston ring 1014 and a compression space-side retaining ring 1034 held pressure-tight on the step side 116 of the Kol bens; this is also the case in all four embodiments of the sealing arrangement 1001, 1002, 1003, 1004, which is made clear by the same reference numbers.
- a passage opening 1116 is presently formed in the profile base 1139.3 for the passage of a fixing element which, like the number of passage openings 1116 in the profile base, is arranged around the circumference of the retaining ring and/or piston ring.
- a fixing element can in principle be designed in any suitable manner as a rounded, oval or circumferentially more or less wide spigot, pin, peg or, in contrast, a comparatively broader partial or full circumferential web.
- the retaining ring 1034 or the piston ring 1014 thus preferably has a fixing element 1113 for each penetration opening 1116 -in both cases or alternatively only one of them, or alternatively both-, so that the retaining ring 1034 with the fixing elements 1113 crossing it with the piston ring 1014 is connected; i.e. H. Due to the reach-through openings in the sealing collar, the sealing collar 1124 is also held securely on the profile base 1139.3 between the piston ring and the retaining ring.
- the fixing web visible in FIGS. 7A, 7B as a fixing element 1113 locks the parts of the sealing arrangement 1004 due to its full circumferential expansion and fitting into the through-openings 1116; i.e. H. the piston ring 1014, the sealing collar 1124 and the retaining ring 1034 of the sealing arrangement 1004 are held against each other in a manner secured against rotation.
- the sealing arrangement 1004 according to the fourth preferred embodiment is shown in detail in FIG. 7B view (i).
- 7B shows in view (i) a first sealing body part 1139 A of the sealing arrangement 1004 and a second sealing body part 11391 of the seal 1004 for the seal composed of the first and second parts as the sealing arrangement 1004 of FIG. 7A in an exploded view as well as a retaining ring 1034 in view (ii) for introduction into a receptacle 1114 of the piston 1112 of FIG. 7C.
- 7C shows a perspective view of the piston 1112 of FIG. 7A according to the concept of the invention in the fourth embodiment with the receptacle 1114 mentioned in FIG. 7B for the retaining ring 1034 of view (ii) of FIG. 7B.
- the sealing sleeve 1024 described and shown here is formed from two separate parts, as already indicated by hatching in FIG. 7A.
- the sealing sleeve 1024 according to the present embodiment has a first annular space-outside separate part 1139A to form the first annular lip 1139.1 of the sealing body 1139 and a second annular space-inside separate part to form the second annular lip 1139.2 of the seal device body 1139.
- the sealing body parts referred to here, the first part 1139A as the sealing body part on the outside of the annular space and the second part 11391 as the sealing body part on the inside of the annular space are shown in view (i) of FIG. 7B in an exploded view.
- the first and second seal body parts 1139A, 11391 thus do not come into contact with one another, even if they together form the sealing collar 1124 of the sealing arrangement 1138 with the seal outside 1138.1 and seal inside 1138.2 indicated in view (i) of FIG. 7B.
- the first and second sealing body parts 1139A, 11391 are actually held at a distance--as shown in FIG.
- the fixing element 1113, formed in the form of the annular web, of the sealing arrangement 1004 according to the fourth specific embodiment thus forms the aforementioned access opening in the sealing arrangement 1004;
- the fourth embodiment of the sealing sleeve 1024 is formed in two parts with the first and second sealing body part 1139A, 11391, leaving a gap to form the passage opening 1116 of the sealing sleeve 1024.
- the first and second outer or inner sealing body parts 1139A, 11391 can therefore be placed one inside the other separately while maintaining the distance -which is established here in the form of the access opening 1116- i.e. form a concentric ring arrangement with the spacing of the access opening 1116 maintained between them.
- the ring web of the fixing element 1113 engages in this annular space of the distance formed in this respect—that is, the passage opening 1116—as is shown in view (ii) of FIG. 7B.
- the retaining ring 1034 has the annular ridge forming the fixing element 1113 and can -at the moment when the annular ridge of the fixing element 1113 engages in the reach-through opening 1116, i.e. reaches through the remaining distance between the first and second sealing body parts 1139A, 11391- into the receptacle 1114 of the piston rings 1014 grab.
- the fixing web of the fixing element 1113 engages in the receptacle 1114 of the piston ring 1014 and is clamped there
- the retaining ring with its collar 1034B fixes the spaced apart sealing body parts 1139A, 11391; fixes them relative to each other on the piston ring 1014.
- the present fourth embodiment of a sealing sleeve 1024 - i.e. the sealing arrangement 1004 formed from the actually separate first and second sealing body parts 1139A, 1139I and the retaining ring 1034 - offers the advantage that the retaining ring 1034 is significantly simpler than in the previously explained embodiments of the sealing arrangement 1001, 1002, 1003 with its fixing element 1113 (as a ring running all the way around) can be introduced into the reach-through opening 1116 or pushed into the receptacle 1114 of the piston ring 1014 and fixed there.
- the ring-inside and ring-outside seal body parts 1139I and 1139A can be separately fitted into a gap space between the aforementioned collar 1034B of the retaining ring 1034 and the groove 1014N of the piston ring 1014, i. H. between the sealing side 1030 of the piston ring 1034 or the folded side 1030 of the retaining ring 1034.
- sealing body parts 1139A, 11391 to form the sealing arrangement 1004 separately between the piston ring 1014 and the retaining ring 1034, rather than inserting the retaining ring 1034 in a sealing arrangement 1004 that is already assembled in itself—that is, with a one-piece annular sealing body 1139 with a first and second annular lip 1139.1, 1139.2
- FIGS. 8 shows a piston according to the concept of the invention in a fifth embodiment in view (i) in an exploded view with screws; these are also shown in the sectional view (ii) and in an assembled perspective view (iii) for a compressor as a double compressor according to the model of FIGS. 2A, 2B;
- the fixing elements 1113 are arranged along the circumference of the piston and retaining ring and/or the piston ring or retaining ring at equal distances along the ring circumference.
- 4A, 4B, 5A, 5B and 6A, 6B are shown as clamping grooves or similar receptacles for the fixing elements 1113 in the case of the fifth embodiment designed as screw holes according to FIG.
- the sealing sleeve 1025 has a corresponding number of fürgriffsöff openings 1116 for the number of fixing elements 1113; in the simplest case, these can be holes or threaded screw holes.
- the retaining ring 1035 has a receptacle 1114 for a fixing element 1113 in the form of a screw; in the simplest case, this can be a hole or a screw hole with a thread for the screw.
- the hole or screw hole has a chamfer, which can be seen in view (i) of FIG. 8, for fitting and countersinking the screw.
- a groove in the retaining ring 1035 or a passage as in the retaining ring 1035 is conceivable in another embodiment, such as a groove in the retaining ring 1035 or a passage as in the retaining ring 1035.
- the piston ring 1015 or the bottom of the piston 1112 has a receptacle 1114 for a fixing element 1113 in the form of a screw;
- this can be a hole or a screw hole with a thread for the screw.
- a groove is also suitable here for a fixing element 1113.
- Corresponding receptacles 1114, such as a groove or a passage, are identified by the reference numeral 1114 in FIG.
- the fixing elements 1113 in the form of fixing pins also lock the parts of the sealing arrangement 1005 due to their circumferentially limited expansion and fitting into the through-openings 1116--as was already the case with the sealing arrangement 1001, 1002, 1003, 1004 explained. i.e.
- the piston ring 1011, 1012, 1013, the sealing collar and the retaining ring 1031, 1032, 1033 of the sealing arrangement 1001, 1002, 1003, 1004 are held against each other so that they cannot rotate is also in the case of the fifth embodiment according to FIG can be seen particularly in the sectional view (ii) that the piston ring 1015 and the retaining ring 1035 and the sealing collar 1025 of the sealing arrangement 1005 are held against each other in a twist-proof manner.
- the sealing sleeve 1025 is clamped with a suitable tightening torque of the screws as fixing elements 1113 between the retaining ring 1035 and the piston ring 1015 with a corresponding clamping effect due to the tightening torque.
- the piston ring 1015 is formed in one piece with the piston 1112 .
- the clamping effect that is also produced means that the sealing arrangement 1005 also holds onto one another in its sandwich structure, as can be seen in view (iii) of FIG. 8; analogously, this is also explained above with regard to the embodiments of the sealing arrangement 1001 , 1002 , 1003 , 1004 .
- FIG. 9 shows a piston according to the concept of the invention in a sixth embodiment in a disassembled perspective view for a compressor shown schematically as a double compressor based on the model of FIGS. 2A, 2B.
- fixing elements 1113 are spaced evenly along the circumference of the piston 1112 and retaining ring 1036 and/or the piston ring 1016 or retaining ring 1036 and are arranged along the ring circumference; a fixing element 1113 is similar to the embodiment of FIG.
- the retaining ring 1036 is cast into the sealing collar 1026 in the sixth embodiment; the cast-in mass can be used to form the retaining ring 1036 with the fixing pin.
- the cast-in mass can flow as a self-fixing plastic mass into the passage openings 1116 in the sealing sleeve 1026, in particular further into receptacles 1114 (not shown here) in the base of the piston 1112 or in the piston ring 1016.
- the fixing pins as fixing element 1113 can be held in place in the reach-through opening 1116 due to their peripherally limited expansion and fit.
- the cast-in mass can be adhesive.
- a retaining ring 1036 with a fixing pin can also be glued or welded into the sealing collar 1026 as a one-piece part; e.g. by ultrasonic welding. In this way, a non-detachable material connection between the retaining ring 1036 and the piston ring 1016 on the piston 1112 will create a bond that holds the sealing sleeve 1026 in place.
- FIG. 10A and FIG. 10B represent a situation on the profile base 1139.3 of an annular sealing body 1139 of a sealing collar, which can generally be realized independently of the previously explained exemplary embodiments, through which a fixing element passes.
- the profile base 1139.3 of an annular sealing body 1139 of a sealing sleeve cannot only be realized with one of the sealing sleeves 1021, 1022, 1023, 1024, 1025 explained above and 1026, but also generally with another suitable sealing collar that is not explained in detail here.
- the profile base 1139.3 of such a sealing sleeve is in any case generally made soft or elastic in the material in order to accommodate the correspondingly formed sealing webs 1119 penetrating the profile base 1139.3 of such a sealing sleeve as sealing edges or in some other way.
- Each of the sealing webs 1119 serves to improve the sealing of the sealing sleeves 1021, 1022, 1023, 1024, 1025, 1026 at their profile base 1139.3 between the sealing side 1010 of the piston ring 1011, 1012, 1013, ... 1016 and the holding side 1030 of the retaining ring 1031, 1032 1033.
- the sealing webs 1119 can also be set differently than can be seen, for example, in FIG. 5B; i.e. each of the sealing webs 1119 can be arranged at a different radial distance from the fixing element 1113 than in Fig. 5B.
- 5B specifically shows an arrangement of sealing webs 1119, in which the sealing webs 1119.1 running radially inwards are offset from one another, with the sealing web 1119.1 of the retaining ring 1031 being offset slightly outwards radially, i.e. closer to the access opening 1116.
- the sealing webs 1119.A running radially outward are arranged offset to one another, with the sealing web 1119.A of the retaining ring 1031 being offset somewhat inward radially, ie also closer to the access opening 1116.
- the sealing webs 1119.H on the retaining ring have a slightly different designation - this can therefore be different from the retaining ring 1031, 1032, 1033, 1034, 1035, 1036 according to the modification in Figure 10A - both further away from the reach-through opening 1116 offset outwards while the sealing webs 1119.K on the piston ring-this can be different in a modification of FIG .
- the sealing webs 1119 can also be set differently than can be seen in FIG. 5B; ie, for example, the sealing webs 1119 can only be arranged on one side but diagonally—so to speak point-symmetrically—to the fixing element 1113 .
- a single sealing ridge 1119.K on the piston ring is a radially outer sealing ridge and this is offset further to the outside spaced apart from the access opening 1116 as the only sealing web 1119.K on the retaining ring, which is a radially inner sealing web and this is offset further closer to the access opening 1116 in comparison.
- the single sealing ridge 1119.K on the piston ring shown in broken lines is a radially inner sealing ridge and is offset further inwards away from the passage opening 1116.
- the single sealing ridge 1119.H on the retaining ring, shown in broken lines, is a radially outer sealing ridge, and this is offset further closer to the reach-through opening 1116 in comparison.
- the sealing webs 1119 are formed as elements on the piston ring 1011, 1012, 1013, 1014, 1015, 1016 and/or retaining ring 1031, 1032, 1033, 1034, 1035, 1036 by pressing into the profile base 1139.3 of a sealing collar and thus designed to keep them twist-proof and, in particular, also to seal them.
- a sealing web 1119, 1119.K, 1119.H is designed in such a way that it presses fully or partially into the profile base 1139.3 of the sealing collar or in some other way into the profile base 1139.3 the sealing sleeve or its volume area can penetrate when fixing the profile base 1139.3 between the base of the piston ring 1011, 1012, 1013, 1014, 1015, 1016 and the base of the retaining ring 1031, 1032, 1033, 1034, 1035, 1036.
- a sealing web is in this respect designed with an appropriately pointed penetration side, so advantageously a trained web edge to the profile base of the sealing collar - for example, best in the form of a ridge z. B of the aforementioned crest ridges - .
- the hardness of the material, in particular of the plastic, of the sealing web is advantageously greater than the hardness of the material, in particular of the plastic, of the sealing collar or its profile base.
- 11A shows a vehicle 400 with a compressed air supply system 200 of FIG. Analogous to that described in relation to FIG. 2A and FIG. 2B, the compressor 1100 has:
- first compression chamber 104 a first compression chamber 104, a second compression chamber 106, an air supply connection 120 and a compressed air outlet 124,
- a piston 1112 with a first end face 113 that can be pressurized, which is directed towards the first compression chamber 104, and a second end face 115, which can be pressurized, opposite the first end face 113 and which is directed towards the second compression chamber 106, the first compression chamber 104 being separated from the first end face 113 is limited and the second compression chamber 106 is limited by the two th end face 115 of the piston 1112, and
- the piston 1112 is connected via a connecting rod 128 to a drive 102, wherein
- the first compression chamber 104 and the second compression chamber 106 are connected to one another via a connecting line 122, wherein the connecting rod 128, in particular rigidly, in particular rigidly and joint-free, is connected to the piston 1112 on a piston side 128.1 and to a drive side 128.2 rotating part 131 of the drive 102 is rotatably connected, and
- the first end face 113 is a solid side 114 and the second end face 115 is a step side 116, the piston 112 carrying at least one sealing device 1138 on the step side 116, which seals the first compression chamber 104 and/or the second compression chamber 106, whereby
- the seal 1138 is formed by means of a profiled ring-shaped sealing body 1139 with a circumferential first annular lip on an outer side 1138.1 of the seal and a circumferential second annular lip on an inner side 1138.2 of the seal.
- the seal 1138 is part of a sealing arrangement 1001, 1002, 1003, 1004 in which it is provided that
- the annular sealing body 1139 is formed as a sealing sleeve 1021, 1022, 1023, 1024 with a profile 1020 open in the circumferential cross section with a profile base, the profile wall of which is formed by means of the first annular lip 1139.1 and the second annular lip 1139.2, wherein - The sealing sleeve 1021, 1022, 1023, 1024 with its profile base is held pressure-tight on the step side 116 between a step-side piston ring 1011, 1012, 1013 and a compression space-side retaining ring 1031, 1032, 1033.
- the first compression chamber 104 is cylindrical or cylindrical with a dome-shaped section 164 and/or the second compression chamber 106 is annularly cylindrical. Even if, in the embodiment described here, with a connecting line 122 for a series connection of the first compression chamber 104 and the second compression chamber 106 -generally in the sense of a series connection of two compressor stages of a multi-stage compressor-
- the concept of the invention is not limited thereto.
- the concept of the invention can also be realized in a multi-stage compressor, the two or more compressor stages of which are realized in the sense of a parallel connection -generally in the sense of a parallel connection of two compressor stages of a more cylinder compressor.
- FIG. 11 B A vehicle 400 with a pneumatic system 500 is shown in detail in FIG. 11 B, which is implemented as part of an ECAS system (Electronically Controlled Air Suspension) for level control of the air-sprung vehicle 400 with an ECU and air springs 210 on supports 410.
- ECAS Electrically Controlled Air Suspension
- the electronic lines to the ECU and the pneumatic lines to the air springs 210 and the compressed air supply system 200 are also shown; this includes corresponding compression springs 300 on the wheel suspension and the aforementioned compressed air supply system 200, which is shown here in perspective detail as an exploded view with a motor compressor and air dryer 222.
- a compressed air supply system 200 is operated within the vehicle 400 with the following steps:
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021110256.1A DE102021110256A1 (de) | 2021-04-22 | 2021-04-22 | Kolben, Verdichter, Druckluftversorgungsanlage, Fahrzeug und Verfahren zum Betreiben einer Druckluftversorgungsanlage |
| PCT/EP2022/059438 WO2022223322A1 (de) | 2021-04-22 | 2022-04-08 | Kolben, verdichter, druckluftversorgungsanlage, fahrzeug und verfahren zum betreiben einer druckluftversorgungsanlage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4326987A1 true EP4326987A1 (de) | 2024-02-28 |
| EP4326987B1 EP4326987B1 (de) | 2025-07-23 |
Family
ID=81346057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22717841.5A Active EP4326987B1 (de) | 2021-04-22 | 2022-04-08 | Kolben, verdichter, druckluftversorgungsanlage, fahrzeug und verfahren zum betreiben einer druckluftversorgungsanlage |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12571389B2 (de) |
| EP (1) | EP4326987B1 (de) |
| CN (1) | CN117157459A (de) |
| DE (1) | DE102021110256A1 (de) |
| WO (1) | WO2022223322A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD1041378S1 (en) * | 2023-01-27 | 2024-09-10 | W.M. Barr & Company, Inc. | Piston |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11168679B2 (en) * | 2017-04-28 | 2021-11-09 | Zf Cv Systems Europe Bv | Compressor, compressed air supply facility for operating a pneumatic system, and method for operating a compressed air supply facility |
Family Cites Families (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB241907A (en) | 1924-10-23 | 1926-04-22 | John Albert Choquette | Fluid turbine |
| US1866022A (en) * | 1930-04-28 | 1932-07-05 | Findeisen Paul | Four-stroke internal combustion engine |
| GB561189A (en) * | 1942-11-02 | 1944-05-09 | Hall & Hall Ltd | Improvements in or relating to packings for seals, stuffing boxes, pistons and the like |
| DE871236C (de) * | 1943-07-11 | 1953-03-19 | Wetzell Gummiwerke Ag | Dichtungselement mit Stuetzkoerper und elastischen Dichtlippen |
| US2600516A (en) * | 1948-10-27 | 1952-06-17 | Jr William E Pielop | Slush pump piston and rod assembly |
| US2701155A (en) * | 1951-02-19 | 1955-02-01 | Globe Hoist Co | Oil seal unit and expander ring therefor |
| US2637606A (en) * | 1951-04-21 | 1953-05-05 | Jr William E Pielop | Slush pump seal ring |
| US2780208A (en) * | 1953-06-23 | 1957-02-05 | Arthur E Brown | Reciprocating engine |
| DE1103540B (de) | 1958-04-03 | 1961-03-30 | Maschf Augsburg Nuernberg Ag | Hydraulischer Kraftheber, insbesondere fuer landwirtschaftliche Fahrzeuge |
| US2927830A (en) * | 1958-09-12 | 1960-03-08 | Internat Packings Corp | Piston seal |
| US3340855A (en) * | 1965-08-16 | 1967-09-12 | Arthur E Brown | Double acting two stroke cycle internal combustion engine |
| US3645542A (en) * | 1969-06-10 | 1972-02-29 | Cam Gears Ltd | Sealing rings |
| US3694111A (en) * | 1970-03-04 | 1972-09-26 | Anton Braun | Free piston engine bounce compressor |
| US3718338A (en) * | 1971-02-03 | 1973-02-27 | Shamban & Co W S | Sealing assembly |
| US4023467A (en) * | 1973-03-06 | 1977-05-17 | Bayerisches Druckgusswerk Thurner Kg | Piston compressor for gaseous fluids |
| US5113808A (en) * | 1983-09-06 | 1992-05-19 | Karl Eickmann | Double piston engine |
| US4706970A (en) * | 1984-11-14 | 1987-11-17 | Polydyne Industries, Inc. | Flexible ring seal with insert in circumferentially extending channel |
| AT399545B (de) * | 1993-05-05 | 1995-05-26 | Hoerbiger Ventilwerke Ag | Dichtungsanordnung |
| US6547250B1 (en) * | 2000-08-21 | 2003-04-15 | Westport Research Inc. | Seal assembly with two sealing mechanisms for providing static and dynamic sealing |
| JP2005299808A (ja) * | 2004-04-13 | 2005-10-27 | Nok Corp | ポンプ用シール |
| WO2007011883A2 (en) * | 2005-07-18 | 2007-01-25 | Kalsi Engineering, Inc. | Filled hydrodynamic seal with contact pressure control, anti-rotation and filler retention |
| US20070017763A1 (en) * | 2005-07-19 | 2007-01-25 | Yao-Chang Lin | Energy conversion device including a piston without O-rings |
| CN101258345B (zh) * | 2005-09-01 | 2011-11-23 | Imo控股有限责任公司 | 用于密封两个可彼此相对扭转的部件的元件 |
| DE102008031848B4 (de) | 2008-07-05 | 2018-09-13 | Wabco Gmbh | Kolbenkompressor |
| US8215646B2 (en) * | 2008-08-28 | 2012-07-10 | Castleman Larry J | Seal assembly |
| US8387990B2 (en) * | 2008-09-09 | 2013-03-05 | Trelleborg Sealing Solutions Americas | Seal assembly |
| DE102010054710A1 (de) | 2010-12-16 | 2012-06-21 | Wabco Gmbh | Kompressor, Druckluftversorgungsanlage, pneumatisches System und Verfahren zum Betreiben einer Druckluftversorgungsanlage |
| DE102011121750A1 (de) | 2011-12-21 | 2013-06-27 | Wabco Gmbh | Kompressor |
| DE102012019618B4 (de) | 2012-10-06 | 2023-10-26 | Zf Cv Systems Hannover Gmbh | Verfahren zum Herstellen eines Kolbens für eine Hubkolbenarbeitsmaschine, nach dem Verfahren hergestellter Kolben sowie Hubkolbenarbeitsmaschine mit wenigstens einem nach dem Verfahren hergestellten Kolben |
| DE112013005600A5 (de) | 2012-11-22 | 2015-10-22 | Schaeffler Technologies AG & Co. KG | Kolben-Zylinder-Einheit |
| DE102012223114A1 (de) | 2012-12-13 | 2014-06-18 | Continental Teves Ag & Co. Ohg | Doppelkolbenkompressoreinheit |
| DE102013101110A1 (de) | 2013-02-05 | 2014-08-07 | Continental Reifen Deutschland Gmbh | Asymmetrischer Hubkolbenverdichter |
| US9611082B2 (en) * | 2013-05-13 | 2017-04-04 | Owens-Brockway Glass Container Inc. | Seal ring for foil-sealing a container |
| DE102017004087A1 (de) * | 2017-04-28 | 2018-10-31 | Wabco Gmbh | Verdichteranordnung für eine Druckluftzuführung einer Druckluftversorgungsanlage |
| DE102018108975A1 (de) * | 2018-04-16 | 2019-10-17 | Wabco Europe Bvba | Steuerventil einer Druckluftanlage |
| JP2023513695A (ja) * | 2020-02-11 | 2023-04-03 | グリーン, ツイード テクノロジーズ, インコーポレイテッド | エネルギーを与えられるスプリングを伴うフエルトワイパシール |
-
2021
- 2021-04-22 DE DE102021110256.1A patent/DE102021110256A1/de active Pending
-
2022
- 2022-04-08 CN CN202280028676.4A patent/CN117157459A/zh active Pending
- 2022-04-08 WO PCT/EP2022/059438 patent/WO2022223322A1/de not_active Ceased
- 2022-04-08 EP EP22717841.5A patent/EP4326987B1/de active Active
-
2023
- 2023-10-23 US US18/492,364 patent/US12571389B2/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11168679B2 (en) * | 2017-04-28 | 2021-11-09 | Zf Cv Systems Europe Bv | Compressor, compressed air supply facility for operating a pneumatic system, and method for operating a compressed air supply facility |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4326987B1 (de) | 2025-07-23 |
| US20240060487A1 (en) | 2024-02-22 |
| US12571389B2 (en) | 2026-03-10 |
| CN117157459A (zh) | 2023-12-01 |
| DE102021110256A1 (de) | 2022-10-27 |
| WO2022223322A1 (de) | 2022-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1553291B1 (de) | Hubkolbenmaschine | |
| DE19650108A1 (de) | Taumelscheiben-Kompressor | |
| EP3615800B1 (de) | Verdichter, druckluftversorgungsanlage zum betreiben einer pneumatikanlage und verfahren zum betreiben einer druckluftversorgungsanlage | |
| EP2652330A1 (de) | Kompressor, druckluftversorgungsanlage, pneumatisches system und verfahren zum betreiben einer druckluftversorgungsanlage | |
| DE102008063916B4 (de) | Bremsbetätiger | |
| WO2018197123A1 (de) | Verdichteranordnung für eine druckluftzuführung einer druckluftversorgungsanlage | |
| DE4342883C2 (de) | Hydraulischer, regelbarer Schwingungsdämpfer für Kraftfahrzeuge | |
| DE4011739A1 (de) | Bremszylinder fuer bremsanlagen von fahrzeugen, insbesondere nutzfahrzeugen | |
| EP4326987A1 (de) | Kolben, verdichter, druckluftversorgungsanlage, fahrzeug und verfahren zum betreiben einer druckluftversorgungsanlage | |
| DE102011121750A1 (de) | Kompressor | |
| DE19523157A1 (de) | Verdichter vom Hubkolbentyp | |
| EP3038871B1 (de) | Druckluftbetätigter bremszylinder mit abgedeckter be- und entlüftungsbohrung | |
| DE19807691B4 (de) | Kompressor, insbesondere für eine Klimaanlage eines Kraftfahrzeugs | |
| DE19501792C2 (de) | Kolben mit Kolbenring | |
| DE69928612T2 (de) | Dichtungseinrichtung | |
| EP3033259B1 (de) | Kondensationsvorrichtung für pneumatische bremszylinder | |
| WO1998009079A1 (de) | Eintrittsventil mit drosseleffekt und mehrstufige kolbenvakuumpumpe | |
| EP2049797A1 (de) | Vorrichtung zum ankoppeln eines kolbens an eine ringscheibe | |
| DE102016222057A1 (de) | Stellkolben für eine Vorrichtung zur Veränderung des Verdichtungsverhältnisses einer Zylindereinheit einer Hubkolbenbrennkraftmaschine | |
| EP1259735A2 (de) | Hubkolbenmaschine | |
| DE10058447C1 (de) | Axialkolbenverdichter für Fahrzeugklimaanlagen | |
| DE4018153A1 (de) | Hydraulische pumpe | |
| DE3401790A1 (de) | Hubkolbenverdichter | |
| WO2013178310A1 (de) | Ölgeschmierter kolbenverdichter | |
| DE102006030256B4 (de) | Federspeicher-Druckluftbremszylinder als Membranzylinder für Fahrzeugbremsanlagen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20230908 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
| INTG | Intention to grant announced |
Effective date: 20250522 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502022004754 Country of ref document: DE |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
| REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20250723 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20251124 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20251123 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20251023 |
|
| REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20251024 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20251023 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20260313 Year of fee payment: 5 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20260309 Year of fee payment: 5 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20250723 |