EP3234374A1

EP3234374A1 - Compressed air device with fluidic connections which are variable on the basis of molded seals

Info

Publication number: EP3234374A1
Application number: EP15816440.0A
Authority: EP
Inventors: Karsten Schnittger; Christian Kuhlen
Original assignee: Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Current assignee: Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Priority date: 2014-12-19
Filing date: 2015-12-17
Publication date: 2017-10-25
Anticipated expiration: 2035-12-17
Also published as: BR112017012229A2; DE102014019116A1; KR101972248B1; TR201906253T4; CN107110183A; WO2016097096A1; CN107110183B; EP3234374B1; KR20170095384A; JP6395940B2; JP2018501143A

Abstract

The invention relates to a vehicle pressure medium device (1) in which a pressure medium flows, comprising a multilayer construction which has at least two layers that contact each other. At least three flow openings (44, 56, 58) of flow channels for the pressure medium open in a first surface (76) of a first layer (20). Said first surface lying opposite a second surface (78) of a second layer (36) adjoining the first layer (20). At least one molded seal (40; 40a, 40b, 40c) containing at least one annular part (46) and at least one closure part (42) connected to the annular part (46) is arranged between the two layers (20, 36), said closure part being provided in order to sealingly close at least one of the flow openings (44, 56, 58) in the first surface (76). According to the invention, the annular part (46) is designed in an annularly circumferential manner, and the at least one closure part (42) is arranged within the annular part (46). The annular part (46) surrounds a chamber (74) through which a pressure medium can flow, and the chamber is further delimited by the first surface (76) and the second surface (78). A group of molded seals (40a, 40b, 40c) is provided, the at least one closure part (42) of each of which has a different position relative to the annular part (46). At least one respective other flow opening (44, 56, 58) is closed by the at least one closure part (42) on the basis of a molded seal (40a, 40b, or 40c) which is selected from the group of molded seals (40a, 40b, 40c) and is mounted between the two layers (20, 36), and thus a respective other fluidic connection between at least two openings (44, 56 or 44, 58 or 56, 58) of the at least three flow openings (44, 56, 58) is produced within the chamber (74); or the molded seal (40) is designed and the flow openings (44, 56, 58) are arranged in the first surface (76) such that at least one other flow opening (44 or 56 or 58) is closed by the at least one closure part (42) on the basis of the rotational position of said molded seal (40), and a respective other fluidic connection between at least two openings (44, 56 or 44, 58 or 56, 58) of the at least three flow openings (44, 56, 58) is produced within the chamber (74).

Description

Pneumatic means with variable due to mold seals

flow connections

description

State of the art

The invention is based on a pressure medium device of a vehicle in which a pressure medium flows, with a multi-layer structure having at least two layers contacting each other, wherein in a first surface of a first layer at least three flow openings of flow channels for the pressure medium open, which a second surface a second layer adjoining the first layer, wherein the two layers at least one molded seal comprising at least one ring member and at least one connected to the ring member closure member is interposed, which is provided for sealing closure of at least one of the flow openings in the first surface, according to Preamble of claim 1.

Such a pressure medium device is known for example from DE 39 10 381 A1 in the form of a manifold connection plate consisting of several intermediate plates and end plates. There is arranged between two intermediate plates, a molded seal, which has disc-shaped closures for closing in the two intermediate plates in each case perpendicular to the plate plane and aligned flow openings. Depending on the design of the molded seal with three closures all three flow openings are closed, then no flow from one flow opening in the one intermediate plate in the associated flow opening of the other intermediate plate can be done more, or there are in any combination only one flow opening or two flow openings closed at the relevant mold seal appropriately arranged closures. Accordingly, a set of molded seals is provided, each having a different number and / or location of shutters, to respectively close or open certain flow channels extending through the intermediate plates that open into the flow openings. This type of form seals is useful when flow channels, which extend through a plurality of intermediate plates and extend perpendicular to the plane of the plate to be opened or closed to make pressure fluid circuits variable. The present invention has the object, a pressure medium device of the type mentioned in such a way that a variable by using different form seals pressure fluid circuit is possible in other ways.

This object is achieved by the features of claim 1.

Disclosure of the invention

According to the invention, it is provided that the annular part has an annular circumference and the at least one closure part is arranged inside the annular part, and the annular part encloses in particular a sealing chamber through which pressure medium can flow, which is further bounded by the first surface and by the second surface. The second surface of the second layer then preferably has no flow opening.

In contrast to DE 39 10 381 A1 mentioned at the outset, therefore, flow connections which are already present or provided between different layers are not opened or closed variably by mounting of different mold seals with regard to the position of the closure part or the closure parts, but rather flow connections between Flow openings designed variable, which are preferably formed on only one layer of the pressure medium device. The flow occurs e.g. then from a flow opening in the first surface of the first layer is at least partially reflected at the second surface of the second layer and then enters a further flow opening in the first surface of the first layer, which is not closed by a closure member. In this case, the area enclosed by the first surface, the second surface and the ring member or limited chamber is flowed through. The second layer, which then only has the task of confining the chamber, then does not have to have any flow openings or flow channels and can then for example also consist of a closed end plate. The second layer can therefore be relatively thin, which also contributes to a space savings. Alternatively, however, the second layer can also have at least one flow opening, which can then be integrated into the flow course in the second layer and / or its associated flow channel.

According to a first variant of the invention, a group of molded seals is provided, each with a different position of the at least one closure part with respect to the ring part, wherein, depending on one of the group of molded seals at least one other flow opening is closed by the at least one closure part selected, and thus each a different flow connection between at least two openings of the at least three openings is realized within the chamber selected, mounted between the two layers mold seal.

Depending on the choice of the molded seal from the group of molded seals, this results in different pressure medium circuits which are already predetermined by the course of the flow channels adjoining the flow openings in the first layer or in further layers. Thus, only by replacing a molded seal with one or more closure parts in a certain position by another mold seal with contrast changed position of the closure part or the closure parts each other flow connections within the pressure means device can be created. This opens up a very cost-effective way of achieving a different pressure medium circuit, in particular a pneumatic or hydraulic circuit, merely by exchanging a molded gasket.

According to a second variant of the invention, the molded seal is designed in such a way and the flow openings are arranged in the first surface such that depending on the rotational position of this molded seal at least one other flow opening closed by the at least one closure member and a respective other flow connection between at least two openings at least three openings is realized within the chamber.

This can be achieved by twisted installation one and the same mold seal a different pressure medium connection, the mold seal must not be replaced. The ring member is preferably formed elastically and may take any circumferential shape, such as a circular, an elliptical or a polygonal shape, wherein the flow openings in the first surface of the first layer are then arranged so that they in changed rotational positions of the molded seal by the at least one closure part are closable.

If in the first surface and / or in the second surface a recess for at least partially receiving the annular part of the molded seal is provided and the recess does not have a rotationally symmetrical circumferential course such as a circular. has the course, then an elastic ring member can adapt to the circumferential profile of the recess with twisted installation. The prerequisite for this, however, is that the circumferential lengths of the recess and the ring part are approximately the same size. Alternatively, the ring member may also be rigid.

The invention is particularly advantageous in the production of variants of the pressure medium device.

The measures listed in the dependent claims advantageous refinements and improvements of claim 1 invention are possible.

Particularly preferably, at least one of the layers is plate-shaped. As a result, the pressure medium device can build flat. According to a development, at least one of the layers represents a housing or a housing component of the pressure medium device. A housing or housing component is to be understood as a component or an assembly which has an outer surface coming into contact with the environment. It does not necessarily have to be a cup-shaped, cylindrical, rectangular or cuboid component with a closed or open interior. Rather, all housing or housing components come into consideration, including plate-shaped housing components, which components, assemblies or connections of the pressure means device such. Accommodate, carry or at least partially encase solenoid valves or relay valves.

According to a development, at least the annular part of the molded seal is held biased between the first surface and the second surface. Then the tightness of the chamber can be determined solely by the bias, i. resulting from an elastic deformation of the ring member.

To secure the position of the molded seal, the ring member may be received in at least one recess or groove formed on the first surface and / or on the second surface. Preferably, the ring member is received in at least one recess or groove formed on the first surface. The recess or groove may be circumferentially or in the circumferential direction also interrupted.

At least the ring part is, for example, elastic and can take on any circumferential shape, wherein the flow openings are arranged in the first surface of the first layer so that they are in changed rotational positions of Form seal by the at least one closure part are closed. This development relates in particular to the second variant of the invention.

Preferably, the ring member or the entire molded seal made of an elastomer and is integral with the at least one closure part. The, for example, circular-plate-shaped or plug-like closure part can then be replaced by a plug which is produced during the production of the molded gasket, e.g. be formed by vulcanization web connected to the ring member.

Particularly preferably, the closure part between the flow opening closed by it and the second surface is held under prestress, whereby the tightness is increased by the then pressed against the edge of the respective flow opening closure member. In addition, the closure part is thereby fixed in position.

Particularly preferably, the pressure medium is formed by compressed air. Then, the pressure medium device is preferably formed by a compressed air supply device for vehicle compressed air systems, comprising as components or assemblies at least one air dryer with an air dryer cartridge, a valve device with a multi-circuit protection valve and optionally other valves, a pressure limiter, a control and regulating electronics and several layers o- Housing components, in or on which the aforementioned components or assemblies are housed. The layers or housing components are then layers or housing components in the above sense. With the group of molded seals according to the first variant of the invention or with the one molded seal according to the second variant of the invention, different variants of compressed air supply devices can then be produced with little effort.

Alternatively, the pressure medium device could also be a pneumatic or electropneumatic brake device, a pneumatic or electropneumatic air suspension device or a pneumatic or electropneumatic door operating device.

The invention also relates to a vehicle, in particular a commercial vehicle comprising a pressure medium device described above. drawing

The invention will be described in more detail below by means of embodiments with reference to the accompanying drawings. It shows

1 is a highly schematic side view of a compressed air supply device according to a preferred embodiment;

Fig. 2 is a rear view of the compressed air supply device of Fig. 1;

3 is a side exploded view of the compressed air supply device of Fig. 1;

FIG. 4 is a perspective view of a middle housing of the compressed air supply device of FIG. 1; FIG.

5 is a cross-sectional view of a portion of the middle housing of

Compressed air supply device of Figure 4;

6a to 6c is a plan view of between housings or housing components of

Compressed air supply device arranged form seals according to a first variant;

Fig. 7 is a cross-sectional view of a molded gasket of Figs. 6a to 6c;

8 is a plan view of a housing disposed between housings or housing components of the compressed air supply device mold seal according to a second variant;

8a to 8c is a plan view of the molded seal of Figure 8 in different mounted rotational positions.

Description of the embodiments

The compressed air supply device 1 shown in FIG. 1 as a preferred embodiment of a pressure medium device according to the invention is arranged on a commercial vehicle and serves for the compressed air supply of compressed air consumers such as a pneumatic or electropneumatic service brake device, parking brake device, air suspension device and / or door actuation device.

The compressed air supply device 1 has an air dryer device 2 with an air dryer cartridge 4, which is detachably and replaceably attached to a first housing 6, which accommodates further components of the air dryer device 2 such as a non-visible here check valve. The first housing 6 is made of aluminum, for example, and is produced by die-casting. The air dryer cartridge or cartridge 4 is releasably secured by means of a fastening device 8, for example a bayonet lock on the first housing 6. The components of the bayonet closure 8 are also made of metal as well as all the connections of the first housing 6, such as a connection 10 for a compressed air-conveying compressor. The connection 10 for the compressor consists, for example, in a piece with the first housing 6 urgeformten pipe socket, in the opening of an internal thread for a corresponding external thread of a fitting of a compressor line is formed. On the first housing 6, a fastening device 12 for fastening the compressed air supply device 1 is further formed on a frame of the utility vehicle, for example in the form of one or more screw eyes. The operation of such an air dryer 2 is well known and will therefore not be explained further here. Furthermore, a pressure limiter or pressure regulator is preferably arranged in the first housing 6, which regulates the pressure in the downstream compressed air tanks or pressure circuits.

The first housing 6 has a connection plate 14, which has been formed in one piece with this, for example, as an aluminum die casting molding and in which connections in the form of at least one flow opening 16 are formed. This flow opening 16 is in alignment with a corresponding flow opening 18 of a first valve block 20 as a housing component of a second housing 22, which is connected at least to the connection plate 14 of the first housing 6, wherein this connection will be discussed later. By communicating with each other flow openings 16, 18 supplied by the compressor, dried in the air dryer 2 compressed air enters the first valve block 20 and in the second housing 22. An additional, coplanar, for example, with the connection plate 14 standing plate 24, the connection between the first Solidify or stiffen the housing 6 and other housings such as the second housing 22. The standing plate 24 is also made of metal, e.g. made of steel.

The first valve block 20, which is preferably an injection-molded part made of plastic, forms a housing component of a plurality of housing components, which together form the second housing 22. This first valve block 20 is more precisely part of a valve device 26 accommodated in the second housing 22, which, inter alia, is a multi-circuit protection valve, in particular a four-circuit protection valve and further valves such as such as solenoid valves, relay valves and shuttle valves. By means of the multi-circuit protection valve or overflow valves, a circular separation of the compressed air consumer circuits connected to the compressed air supply device 1, such as service brake circuit I, service brake circuit II, parking brake circuit, secondary consumption circuit, is realized. Not least, in the second housing 22, the electronic control and the (solenoid) valves of an electropneumatic parking brake device and / or an electropneumatic air suspension device of the utility vehicle can be housed.

The first valve block 20 has, for example, first valve domes 28 in which valve seats 32, which cooperate with valve seats 30, are movably guided by seat valves of the valve device 26. The valve body 32 are individually recognizable by the exploded view of Figure 3 and biased by compression springs 34 in the closing or opening direction of the relevant seat valve. The valve block 20 may also be designed without valve domes 28.

The second housing 22 has, as a further housing component, a second valve block 36 of the valve device 26, with second valve domes 38, on which the valve seats 30 of the seat valves of the valve device 26 are preferably formed in one piece, as can be seen in particular from FIG. When lifted off the valve seat 30 valve body 32, the relevant seat valve is in the open position and urged against the valve seat 30 valve body 32 in the closed position. In the present case, for example, it is a pressure relief valve, which is pneumatically operated. However, it is also conceivable that the opening or closing position of at least one of the seat valves there is magnetic, i. by means of supply or outflow of one or more magnetic coils.

The second valve block 36 preferably also constitutes an injection-molded part made of plastic. Furthermore, the first valve block 20 and the second valve block 36 constitute separate housing components of the second housing 22, as at least portions of their peripheral surfaces come into contact with the environment and if components such as e.g. accommodate the valve body 32 in its interior.

The first valve domes 28 and the second valve domes 38 are positioned relative to each other during assembly so that they at least partially axially into one another and the associated valve seats 30 and valve body 32 with each other aligned. For this purpose, corresponding centering measures are provided. This is illustrated in particular by FIGS. 3 and 5.

As is apparent from Figure 3, some of the valve blocks or housings or housing components of the compressed air supply device 1 molded seals 40 are interposed. As an example, a molded gasket 40 between the first valve block 20 and the second valve block 36 is considered below, which is embodied, for example, as an elastic, one-piece mold seal 40 consisting of an elastomer.

FIGS. 6a to 6c show various embodiments 40a, 40b and 40c of a first variant of molded seals 40. The form seals 40a to 40c shown here by way of example each have an annular peripheral annular part 46, wherein here only one closure part 42 is arranged inside the annular part 46, for example. Ring member 46 and closure member are connected to each other for example by a web 50, wherein wherein ring member 46, closure member 42 and web are preferably formed as an elastic and integrally formed elastomeric member. The closure member 42 is disposed within the peripheral ring member 46 and has inwardly therefrom.

The ring member 46 encloses or surrounds a pressure-medium-flowed chamber 74, which is not filled exclusively by the closure member 42, i. means, the chamber 74 has a clear width. This chamber 74 is further limited except by the ring member 46 by a first surface 76 of the here, for example, the first valve block 20 and by a second surface 78 of the second valve block 36 here, for example, as Fig. 7 illustrates.

6a, for example, in the state of the molded seal 40 installed in the first valve block 20, sealingly closes, for example, a first flow opening 44 formed in the first surface 76 in the first valve block 20. For this purpose, the outer diameter of the closure part 42 is preferably slightly larger than the inner diameter of the first flow opening 44 closed by the closure part 42, so that a certain contact pressure between the closure part 42 and the inner peripheral surface of the first flow opening 44 is present in the mounted state. Furthermore, the ring member 46 is held or guided, for example, in a first groove 48 formed on the surface of the first valve block 20 (FIG. 7). By a with respect to the first groove 48 aligned and parallel second groove (not shown) in the second valve block 36, the ring member 46 may also be fixed between the first groove 48 and the second groove, as shown in Figures 6a to 6c and 7 easily is conceivable. Also conceivable is an embodiment without such or without such grooves or depressions, wherein that the ring member 46 is then fixed in position alone by the prevailing between the two valve blocks 20, 36 pressure.

The web 50 is slightly longer than actually necessary to create a certain tolerance compensation in the installed state of the molded seal 40a. In addition, the web 50 forms a captive for the closure member 42nd

As can be seen from FIG. 7, the closure part 42 has knobs 54 on its surface facing the second valve block 36, which forms a support surface for the second valve block 36. Therefore, the closure member 42 preferably extends from the first flow opening 44 to the second surface 78 of the second valve block 36 and is biased there, which contributes to the positional fixation of the closure member 42 in the flow opening 44 and to increase the tightness. Furthermore, the closure part 42 may also have on its radially outer peripheral surface one or more radially projecting and circumferential sealing lips 52 which deform elastically in the state mounted in the flow opening. A radially projecting step formed on the closure member 42 corresponding to the edge of the first flow opening 44 also acts as an axial seal when the closure member 42 is pressed by the second valve block 36 against the edge of the first flow opening 44. The bias of the valve blocks 20 and 36 against each other is applied by tie rods 68 described later.

6b and 6c, the closure part 42 closes a respective different flow opening of the three flow openings 44, 56 and 58 in the first area 76 in the first valve block 20, for example a first flow opening 44, a second flow opening 56 or a third flow opening 58.

Therefore, according to the first variant, a group of molded seals 40a, 40b, 40c each having a different position of a closure member 42 with respect to the ring member 46th is provided, depending on a selected from the group of molded seals 40a, 40b, 40c, between the two valve blocks 20, 36 mounted mold seal 40a, 40b or 40c each have at least one other flow opening 44, 56, 58 through the closure member 42 of the currently selected Formed seal 40a, 40b or 40c closed and thus each a different flow connection between two flow openings 56 and 58 (Figure 6a) and 44 and 56 (Figure 6b) and 44 and 58 (Figure 6c) of the three flow openings 44, 56th and 58 is realized within the chamber 74.

In the case of the molded seal 40a of FIG. 6a, the first flow opening 44 is closed by the closure part 42, but then there is still a flow connection between the second flow opening 56 and the third flow opening 58. The flow openings 44, 56, 58 represent here, for example, mouths of flow channels, which are formed in the first valve block 20 and extend perpendicular or parallel to the plate plane. FIG. 7 shows, by way of example, a flow channel 80 extending parallel to the plane of the plate, the flow opening 44 of which, however, being closed by the closure part 42.

In FIG. 6a, for example, compressed air flows from a flow channel formed in the first valve block 20 via the second flow opening 56 as an opening into the chamber 74, is then at least partially reflected on the second surface 78 of the second valve block and is then via the third flow opening 58 in the associated flow channel in the first valve block 20 discharged. The chamber 74 is therefore flowed through. In the case of the molded seals 40b and 40c, other flow connections between, for example, two flow openings 44 and 56 or 44 and 58 are then respectively created in an analogous manner.

Instead of only three flow openings 44, 56 and 58, more than three flow openings, which are in fluid communication with the chamber 74, could also be formed in the first area 76 of the first valve block 20. Furthermore, a molded seal 40a, 40b or 40c can also have a plurality of closure parts 42 in order to block more than just one flow opening in each case.

By exchanging the molded seal 40a in FIG. 6a with another molded seal 40b or 40c, each with a different position of the closure part 42 or the closure parts with respect to the ring part 46, different flow connections between the flow openings 44, 56, 58 and their associated flow Channels are created in the first valve block 20. The second valve block 36 preferably has no flow opening in the region of the chamber 74, but may be equipped there with such, which is then also an orifice of a flow channel formed in the second valve block. Such a design extends the number of possible flow connections between flow channels.

The flow openings 44, 56 and 58 in the valve block 20 preferably have an identical inner diameter. The closure part 42 of the molded seals 40a, 40b and 40c also preferably has the same outer diameter.

According to a variant shown in Figure 8 and Figures 8a to 8c different flow connections between the flow openings 44, 56 and 58 by a respective other mounting position one and the same mold seal 40 are generated. In this case, the molded seal 40 is for example in relation to an imaginary axis of rotation perpendicular to the plane of the valve blocks 20, 36 respectively installed only in a different rotational position, in which case here, for example, triangular ring member 46 each elastically adapts, but the mold seal 40 is otherwise not changed. Therefore, depending on the mounting position of the molded seal 40, a respective different flow opening 44 or 56 or 58 in the first valve block 20 is opened or closed, so that with the help of one and the same mold seal 40 different flow connections in the first valve block 20 is opened or closed and thus different pneumatic circuits can be formed.

In the rotational position of FIG. 8a, the closure part 42 of the molded seal 40 closes, for example, the first flow opening 44, in a further rotational position according to FIG. 8b, the third flow opening 58 and, in another turn position, the second flow opening.

As in the variant according to FIGS. 6a to 6c and 7, in the variant according to FIGS. 8a to 8c the annular part 46 of the molded seal 40 can be held or guided in a first groove formed on the surface of the first valve block 20. By an aligned in relation to the first groove and parallel second groove (not shown here) in the second valve block 36, the ring member 46 may also be fixed between the first groove and the second groove. A design without a groove is conceivable. The design of the closure part 42 or its mounting in the flow openings 44, 56 and 58 and fixation between the valve blocks 20 and 36 is preferably carried out as in the first variant and as shown in FIG.

As best seen with reference to Figure 3, in the second housing 22 and a control and regulating electronics 60 is arranged, which controls or regulates all implemented functions of Druckluftversorgungseinrich- device via implemented control and regulating software, including the parking brake function and / or the air suspension function as mentioned above. A control and electronic control unit 60 comprehensive board is attached, for example, on the side facing away from the first valve block 20 side surface of the second valve block 36.

The second housing 22 or, inter alia, the first valve block 20 and the second valve block 36 are held between the first housing 6 and a third housing 62, which preferably also represents an aluminum die-cast part, wherein a composite of the first housing 6, the second housing 22nd and the third housing 62 is formed. The third housing 62 is preferably plate-shaped, wherein on its side facing away from the second housing 22 surface 64 terminals for pipes and / or lines of the compressed air consumer circuits are formed, as is apparent in particular from Figure 2 and Figure 3.

These connections 64 consist, for example, in one piece with the third housing 62 urgeformten pipe socket, in whose openings internal thread for corresponding external thread of fittings of the connected pipes and lines are formed. On the third housing 62, a fastening device 66 for fastening the compressed air supply device 1 is further formed on the frame of the utility vehicle, for example in the form of one or more screw eyes. Consequently, the preferred embodiment of a compressed air supply device 1 described here is preferably held only on the first housing 6 and on the third housing 62 by means of corresponding fastening devices 12, 66 on the frame of the utility vehicle, while the second housing 22 has no such fastening device. Alternatively, the compressed air supply device 1 could also be held only on the fastening device 12 on the first housing 6 or the fastening device 66 on the third housing 62, which then results in a cantilevered position. As illustrated in particular in FIG. 3, the second housing 22 is held between the first housing 6 and the third housing 62 by means of a tie rod 68 counteracted on the one hand in the first housing 6 and on the other hand in the third housing 62. Since the two valve blocks 20, 36 and the third housing 62 with respect to the plane of the terminal plate 14 of the first housing 6 laterally extend beyond this terminal plate 14, the tie rods 68 are also anchored in the standing plate 24. The connection plate 14, the two valve blocks 20, 36 and the plate-shaped third housing 62 are further preferably arranged in parallel, which requires a compact design.

In particular, as shown in FIG. 3, the second housing 22 additionally includes an intermediate plate 70 disposed between the second valve block 36 and the third housing 62 and having openings or flow channels defining openings or flow channels in the second valve block 36 having openings or flow channels in the third housing 62 interconnects, which are connected to the terminals 64 for the compressed air circuits of the compressed air consumer. The intermediate plate 70, which likewise constitutes an injection molding of plastic and is arranged parallel to the connection plate 14, the two valve blocks and the plate-shaped third housing, supports or counteracts components of at least some valves of the valve device 26, which pass through openings of the second valve domes 38 protrude in the second valve block 36. These components are, for example, valve seats, which are then integrally formed in the intermediate plate 70 and are urgeformt with this.

On the other hand, the intermediate plate 70 creates flow paths and flow channels between valves of the valve device 26 and the connections 64 for the compressed air consumer circuits. In particular, groove-shaped flow paths and in their interior these flow paths interconnecting flow channels may be formed on their on the one hand the second valve block 36 facing surface and on the other hand the third housing 62 facing surface. These flow paths or flow channels are preferably integrally formed in one piece together with the intermediate plate 70 by injection molding.

As was already the case between the valve blocks, on the one hand the second valve block 36 and the intermediate plate 70 and the intermediate plate 70 and the third housing 62 are also sealingly intermeshed with form seals 40 which are connected with their manifolds. Schlußilen 42 seal at least one opening or a flow channel of the intermediate plate 70 sealing. The sealing parts 46 of the molded seals 40 are in turn also guided and fixed in grooves in the second valve block 36, in the intermediate plate 72 and in the third housing 62. Then, depending on the location or execution of the mold seal concerned 40 certain flow paths are closed or released.

The second housing 22 therefore comprises here the two valve blocks 20, 36 as well as the intermediate plate 70 as well as the molded seals 40, wherein preferably all these components are made of plastic or of elastomer. Thermoplastics are preferably used as plastics, preferably semicrystalline thermoplastics, for example, relatively thin-walled with up to 2.5 mm wall thickness, preferably with or without glass fiber reinforcement. These parts 20, 36, 70 are preferably produced by injection molding. Alternatively or additionally, thermosetting plastics can also be used, in particular in order to produce thick-walled parts 20, 36, 70 with a wall thickness of more than 2.5 mm.

The first housing 6 and the third housing 62, in contrast, are made of metal, preferably of aluminum, wherein at these housings 6, 62 terminals 10, 64 are preferably formed in one piece urgeformt at least for the compressor and the compressed air consumer circuits, because the terminals 10, 64, the eg are designed as pipe socket with internal thread, have to meet higher demands on strength and rigidity.

Furthermore, the fastening devices 8, 68 for fastening the compressed air supply device 1 to the frame of the commercial vehicle made of metal also exist on the first housing 6 and on the third housing 62, because higher rigidity and strength requirements are also imposed on these fastening devices.

Therefore, in the compressed air supply device 1 metal housing or metal components are used only where the typically high strength and rigidity of metals can be used advantageously, for example, as a composite material of a composite of metal and plastic housings or housing components 20, 36, 70, in which the second Housing 22 is made of plastic housing components in sandwich construction between the first housing 6 made of metal and the third housing 62 is held in metal and the transmission of force and force from the composite or from the sandwich construction in the structure of the motor vehicle, for example, exclusively by the existing first metal housing 6 and third housing 62.

Thus, for the second housing 22 encompassed or encompassed by the first housing 6 and the third housing 62 or for its housing components 20, 36 and 70, plastics with relatively low strength (tensile strengths <200 N / mm ² , but higher pressure resistance) can be used. be used, since then a large part of the operating and weight forces of the metal first housing 6 and the metal third housing 62 is received.

LIST OF REFERENCE NUMBERS

Druckluftversorgungseinnchtung

Luftrocknereinrichtung

Air dryer cartridge

first housing

fastening device

connection

fastening device

connecting plate

flow opening

first valve block

second housing

deepening plate

valve means

first valve dome

valve seat

valve body

compression springs

second valve block

second valve dome

shaped seal

closing part

first flow opening

ring part

first groove

web

sealing lip

burl

second flow opening

third flow opening

Control electronics third case

connections

Fastening device tie rod

intermediate plate

valve seat

chamber

first surface

second surface

flow channel

Claims

claims

Pressure medium device (1) of a vehicle, in which a pressure medium flows, with a multi-layer structure having at least two layers contacting each other, wherein in a first surface (76) of a first layer (20) at least three flow openings (44, 56, 58) of Flow channels for the pressure medium, which faces a second surface (78) of a second layer (36) adjacent to the first layer (20), wherein the two layers (20, 36) at least one molded seal (40; 40a, 40b, 40c ) comprising at least one ring part (46) and at least one closure part (42) connected to the ring part (46), which is provided for the sealing closure of at least one of the flow openings (44, 56, 58) in the first surface (76), characterized in that

the ring part (46) has an annular circumference and the at least one closure part (42) is arranged inside the ring part (46), and

the ring member (46) enclosing a pressurizable fluid permeable chamber (74) further defined by the first surface (76) and the second surface (78), wherein

a group of molded seals (40a, 40b, 40c) each having a different location of the at least one closure member (42) relative to the ring member (46) and depending on one selected from the group of molded seals (40a, 40b, 40c) at least one other flow opening (44, 56, 58) closed by the at least one closure part (42) and thus each have a different flow connection between at least two openings (44 , 56, 44, 58 and 56, 58 respectively) of the at least three flow openings (44, 56, 58) within the chamber (74) is realized, or wherein

the molded seal (40) is formed in such a way and the flow openings (44, 56, 58) are arranged in the first surface (76) such that at least one other flow opening (44 or 56 or 58) depends on the rotational position of this molded seal (40). closed by the at least one closure part (42) and a respective different flow connection between less at least two openings (44, 56 and 44, 58 and 56, 58) of the at least three openings (44, 56, 58) within the chamber (74) is realized.

Second pressure means (1) according to claim 1, characterized in that at least one of the layers (22, 36) is plate-shaped.

3. pressure medium device (1) according to claim 1 or 2, characterized in that at least one of the layers (20, 36) is a housing or a housing component of the pressure medium device (1).

4. pressure means device (1) according to any one of the preceding claims, characterized in that the annular part (46) integral with the at least one closure part (42) is executed.

5. pressure medium device (1) according to any one of the preceding claims, characterized in that the closure part (42) represents a kreisplattenför- shaped plug, which is connected by a web (50) with the ring member (46).

6. pressure medium device (1) according to any one of the preceding claims, characterized in that the molded seal (40; 40a, 40b, 40c) consists of an elastomer.

7. pressure means device (1) according to any one of the preceding claims, characterized in that the annular part (46) in at least one on the first surface (76) and / or on the second surface (78) formed recess or groove (48) is accommodated ,

8. pressure medium device (1) according to any one of the preceding claims, characterized in that at least the ring part (46) of the Formdich- (40; 40a, 40b, 40c) is biased between the first surface (76) and the second surface (78).

9. pressure means device (1) according to one of the preceding claims, characterized in that at least the ring member (46) is formed elastically.

10. pressure medium device (1) according to one of the preceding claims, characterized in that the annular part (46) is elastic and can take any circumferential shape, wherein the flow openings (44, 56, 58) in the first surface (76) of the first layer (20) are arranged so that they can be closed in changed rotational positions of the molded seal (40) by the at least one closure part (42).

1 1. Pressure-medium device (1) according to one of the preceding claims, characterized in that the closure part (42) is held under pretension between the flow opening (44, 56, 58) closed by it and the second surface (78).

12. Pressure medium device (1) according to one of the preceding claims, characterized in that the pressure medium is formed by compressed air.

13. Pressure medium device (1) according to claim 12, characterized in that it includes a compressed air supply device for vehicle compressed air systems, comprising as components or assemblies at least one air dryer device (2) with an air dryer cartridge (4), a valve device (26) with a multi-circuit protection valve and optionally further valves, a pressure limiter, a control and regulating electronics (60) and a plurality of layers or housing components (6, 20, 22, 36, 62), in or on which the aforementioned components or assemblies are housed.

14. Druckmitteleinnchtung (1) according to claim 12, characterized in that it includes a pneumatic or electropneumatic braking device, a pneumatic or electropneumatic air suspension device or a pneumatic or electro-pneumatic door operator.

15. vehicle comprising a pressure medium device (1) according to one of the preceding claims.