DE102014019116A1 - Pneumatic means with variable due to form seals flow connections - Google Patents

Abstract

The invention relates to a pressure medium device (1) of a vehicle, in which a pressure medium flows, having a multilayer structure which has at least two layers contacting one another, wherein at least three flow openings (44, 56 ') in a first area (76) of a first layer (20) , 58) of flow channels for the pressure medium which faces a second surface (78) of a second layer (36) adjoining the first layer (20), wherein the two layers (20, 36) comprise 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 ) is provided. The invention provides that the annular part (46) is formed annularly encircling and the at least one closure part (42) within the ring member (46) is arranged, and the ring member (46) encloses a pressure fluid through-flow chamber (74), which further by the first surface (76) and by the second surface (78) is limited, wherein a group of molded seals (40a, 40b, 40c), each with a different position of the at least one closure part (42) with respect to the ring member (46) is provided and depending on a selected from the group of molded gaskets (40a, 40b, 40c), between the two layers (20, 36) mounted mold seal (40a, 40b or 40c) each have at least one other flow opening (44, 56, 58) through which at least a closure part (42) and thus each a different flow connection between at least two openings (44, 56 and 44, 58 and 56, 58) of the at least three flow openings (44, 56, 58) within the Chamber (74) is realized, or wherein the molded seal (40) is formed and the flow openings (44, 56, 58) in the first surface (76) are arranged such that depending on the rotational position of the molded seal (40) at least one another flow opening (44 or 56 or 58) closed by the at least one closure part (42) and a respective other flow connection between at least two openings (44, 56 and 44, 58 and 56, 58) of the at least three openings (44, 56 , 58) is realized within the chamber (74).

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 for example off DE 39 10 381 A1 in the form of a manifold plate consisting of several intermediate plates and end plates known. 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 the aforementioned DE 39 10 381 A1 Therefore, flow connections which are already present or provided between different layers are not variably opened or closed by mounting of different shape seals with respect to the position of the closure part or the closure parts, but instead flow connections between flow openings are made variable, which preferably takes place on only one layer the pressure medium device are formed. The flow occurs z. B. then from a flow opening in the first surface of the first layer is at least partially reflected on 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 member with respect to the ring member, wherein depending on a selected from the group of form seals, mounted between the two layers mold seal at least one other flow opening through the at least closed a closure member and thus each a different flow connection between at least two openings of the at least three openings is realized within the chamber.

This results depending on the choice of the molded seal from the group of molded gaskets different pressure medium circuits that already by the course of the flow channels adjoining the flow openings are predetermined 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. B. has a circular course, then an elastic ring member can be adapted 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 medium device such. B. solenoid valves or relay valves, wear or at least partially encase.

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 alone from the bias, d. H. 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 elastically formed and can take on any circumferential shape, wherein the flow openings in the first surface of the first layer are arranged so that they can be closed in changed rotational positions of the molded seal by the at least one closure part. 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 example circular-plate-shaped or plug-like closure part can then be replaced by a z. B. web formed by vulcanization may be connected to the ring member.

Particularly preferably, the closure part between the closed flow opening and the second surface is held under bias, whereby the tightness by then against the edge of the relevant Flow opening pressed closure part is increased. 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 multiple layers or housing components, in or at 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 a highly schematic side view of a compressed air supply device according to a preferred embodiment;

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

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

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

5 a cross-sectional view of a portion of the central housing of the compressed air supply device of 4 ;

6a to 6c a plan view of arranged between housings or housing components of the compressed air supply device form seals according to a first variant;

7 a cross-sectional view of a molded seal of 6a to 6c ;

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

8a to 8c a plan view of the molded seal of 8th in different mounted rotary positions.

Description of the embodiments

In the 1 shown compressed air supply device 1 as a preferred embodiment of a pressure medium device according to the invention is arranged on a commercial vehicle and is used for 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 operating device.

The compressed air supply device 1 has an air dryer device 2 with an air dryer cartridge 4 which is detachable and replaceable on a first housing 6 is attached, which further components of the air dryer device 2 such as a not visible here check valve accommodated.

The first case 6 For example, it is made of aluminum and is produced by die-casting. The air dryer cartridge or cartridge 4 is by means of a fastening device 8th , For example, a bayonet lock on the first housing 6 releasably secured. The components of the bayonet lock 8th are also made of metal as well as all connections of the first housing 6 like a connection 10 for a compressed air conveying compressor. The connection 10 for example, the compressor is in one with the first housing 6 in one piece urgeformten pipe socket, in the opening of an internal thread for a corresponding external thread of a fitting of a compressor line is formed. At the first housing 6 is still a fastening device 12 for fastening the compressed air supply device 1 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 device 2 is well known and should therefore not be further explained here. Furthermore, preferably also a pressure limiter or Pressure regulator in the first housing 6 arranged, which regulates the pressure in the downstream compressed air tanks or pressure circuits.

The first case 6 has a connection plate 14 on, for example, this has been molded in one piece as Aluminiumdruckgussformling and in which connections in the form of at least one flow opening 16 are formed. This flow opening 16 is aligned with a corresponding flow opening 18 a first valve block 20 as a housing component of a second housing 22 , which at least with the connection plate 14 of the first housing 6 is connected, with this connection will be discussed later. Through the communicating flow openings 16 . 18 enters the supplied by the compressor, in the air dryer device 2 dried compressed air in the first valve block 20 or in the second housing 22 , An additional, for example with the connection plate 14 coplanar standing plate 24 can the connection between the first case 6 and other housings such as the second housing 22 solidify or stiffen. The standing plate 24 is also made of metal, z. B. made of steel.

The first valve block 20 , which preferably represents an injection molded part made of plastic, forms a housing component of a plurality of housing components, which together form the second housing 22 form. This first valve block 20 is more precisely a part of one in the second housing 22 placed valve device 26 , which includes, inter alia, a multi-circuit protection valve, in particular a four-circuit protection valve and other valves such as solenoid valves, relay valves and shuttle valves. By means of the multi-circuit protection valve or the overflow valves is a Kreistrennung the to the compressed air supply device 1 Connected compressed air consumer circuits such as service brake circuit I, service brake circuit II, parking brake, secondary consumption realized. Last but not least, in the second housing 22 also 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 accommodated.

The first valve block 20 has, for example, first valve dome 28 on, in which with valve seats 30 together acting valve body 32 of seat valves of the valve device 26 are movably guided. The valve body 32 are based on the exploded view of 3 individually recognizable and by compression springs 34 biased in the closing or opening direction of the relevant seat valve. The valve block 20 but also without valve dome 28 be executed.

The second housing 22 has as a further housing component a second valve block 36 the valve device 26 on, with second valve dome 38 to which the valve seats 30 the seat valves of the valve device 26 preferably formed in one piece, as in particular from 5 evident. When from the valve seat 30 lifted valve body 32 the poppet valve in question is in the open position and against the valve seat 30 crowded valve body 32 in closed position. In the present case, for example, it is a pressure relief valve, which is pneumatically operated. It is also conceivable, however, for the opening or closing position of at least one of the local seat valves to be magnetic, that is to say by means of energization or outflow of one or more magnet coils.

The second valve block 36 in this case also preferably represents an injection-molded part made of plastic. Furthermore, the first valve block 20 and the second valve block 36 separate housing components of the second housing 22 when at least portions of their peripheral surfaces come into contact with the environment and they components such. B. the valve body 32 to host in their interior.

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

How out 3 As can be seen, are some of the valve blocks or housings or housing components of the compressed air supply device 1 molded seals 40 interposed. As an example, below is a molded seal 40 between the first valve block 20 and the second valve block 36 considered, for example, as a resilient, one-piece and made of an elastomeric molded seal 40 is executed.

In 6a to 6c are different versions 40a . 40b and 40c a first variant of molded gaskets 40 shown. The form seals shown here by way of example 40a to 40c each have an annular peripheral ring part 46 on, for example, here only a closure part 42 within the ring part 46 is arranged. ring part 46 and closure part, for example, by a bridge 50 interconnected, wherein being ring part 46 , Closure part 42 and web are preferably formed as an elastic and integral elastomer part. The closure part 42 is within the circumferential ring part 46 arranged and has starting from this inward.

The ring part 46 encloses or surrounds a chamber through which pressure medium flows 74 , Which not exclusively from the closure part 42 is filled, that is, the chamber 74 has a clear width. This chamber 74 is except through the ring part 46 continue through a first area 76 of the here, for example, first valve block 20 and through a second surface 78 of here, for example, second valve block 36 is limited, in particular 7 illustrated.

The closure part 42 is in particular circular plate-shaped or plug-shaped and closes in the molded seal 40a from 6a for example, in the first valve block 20 built-in state of the molded gasket 40 for example, a first, in the first area 76 in the first valve block 20 trained flow opening 44 sealing. For this purpose, the outer diameter of the closure part 42 preferably slightly larger than the inner diameter of the through the closure part 42 closed first flow opening 44 , so that in the assembled state, a certain contact pressure between the closure part 42 and the inner peripheral surface of the first flow opening 44 is available.

Furthermore, the ring part 46 for example, in a on the surface of the first valve block 20 trained first groove 48 held or managed ( 7 ). By a relation to the first groove 48 aligned and parallel second groove (not shown here) in the second valve block 36 can the ring part 46 also between the first groove 48 and the second groove to be fixed as shown by the 6a to 6c and 7 is easy to imagine. Also conceivable is an embodiment without such or without such grooves or depressions, wherein that of the ring part 46 then alone through the between the two valve blocks 20 . 36 prevailing pressure is fixed in position.

The jetty 50 is slightly longer than actually necessary to be in the installed state of the molded seal 40a to create a certain tolerance compensation. Besides, the jetty forms 50 a captive for the closure part 42 ,

How out 7 shows, the closure part 42 on his to the second valve block 36 pointing surface pimples 54 on which a support surface for the second valve block 36 forms. Therefore, the closure part extends 42 preferably from the first flow opening 44 to the second area 78 of the second valve block 36 and lies there under pretension, resulting in fixing the position of the closure part 42 in the flow opening 44 and contributes to increasing the tightness. Furthermore, the closure part 42 also on its radially outer peripheral surface one or more radially projecting and circumferential sealing lips 52 which elastically deform in the state mounted in the flow opening. One corresponding to the edge of the first flow opening 44 formed radially projecting step on the closure part 42 also acts as an axial seal when the closure part 42 through the second valve block 36 against the edge of the first flow opening 44 is pressed. The bias of the valve blocks 20 and 36 against each other will be described later by tie rods 68 applied.

At the in 6b and 6c shown molded gaskets 40a to 40c closes the closure part 42 a respective other flow opening of the three flow openings here 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 gaskets 40a . 40b . 40c each with a different position of a closure part 42 in relation to the ring part 46 is provided, depending on one of the group of form seals 40a . 40b . 40c selected, between the two valve blocks 20 . 36 assembled molded seal 40a . 40b or 40c in each case at least one other flow opening 44 . 56 . 58 through the closure part 42 the currently selected molded seal 40a . 40b or 40c closed and thus each a different flow connection between two flow openings 56 and 58 ( 6a ) respectively. 44 and 56 ( 6b ) respectively. 44 and 58 ( 6c ) of the three flow openings 44 . 56 and 58 inside the chamber 74 is realized.

In the form of sealing 40a from 6a becomes the first flow opening 44 from the closing part 42 closed, but then still a flow connection between the second flow opening 56 and the third flow opening 58 is available. The flow openings 44 . 56 . 58 represent here, for example, mouths of flow channels in the first valve block 20 are formed and perpendicular or parallel to the plane of the plate. In 7 is an example of a parallel to the plate plane extending flow channel 80 shown, whose flow opening 44 but here through the closure part 42 is closed.

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

Instead of only three flow openings here 44 . 56 and 58 could be in the first area 76 of the first valve block 20 also be formed more than three flow openings, which communicate with the chamber 74 in fluid communication. Furthermore, a molded seal 40a . 40b or 40c also several closure parts 42 to block more than one flow opening at a time.

By replacing the molded gasket 40a in 6a through another molded seal 40b respectively. 40c each with a different position of the closure part 42 or the closure parts in relation to the ring part 46 Therefore, different flow connections between the flow openings 44 . 56 . 58 and their associated flow channels in the first valve block 20 be created. The second valve block 36 points in the area of the chamber 74 preferably does not have a flow opening, but may be equipped there with such, which is then also a mouth of a formed in the second valve block flow channel. 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. Also the closure part 42 the molded gaskets 40a . 40b and 40c preferably has the same outer diameter in each case.

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

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

As with the variant according to 6a to 6c and 7 can also according to the variant 8a to 8c the ring part 46 the molded gasket 40 in a on the surface of the first valve block 20 trained first groove held or guided. By a with respect to the first groove aligned and parallel second groove (not shown here) in the second valve block 36 can the ring part 46 also be fixed between the first groove and the second groove. A design without a groove is conceivable.

The formation of the closure part 42 or its storage in the flow openings 44 . 56 and 58 and fixation between the valve blocks 20 and 36 is preferred as in the first variant and as in 7 shown executed.

How best by 3 Visible, is in the second housing 22 also a control electronics 60 arranged, which via implemented control and regulating software preferably all the functions of the compressed air supply device 1 controls or regulates, inter alia, the parking brake function and / or the air suspension function, as already mentioned above. One the control electronics 60 comprehensive board is for example on the first valve block 20 way-facing side surface of the second valve block 36 attached.

The second housing 22 or among other things, the first valve block 20 and the second valve block 36 are between the first housing 6 and a third housing 62 which also preferably represents an aluminum die-cast part, wherein a composite of the first housing 6 , the second housing 22 and the third housing 62 is trained. The third case 62 is preferably plate-shaped, with its from the second housing 22 way-facing surface connections 64 are designed for pipes and / or lines of the compressed air consumer circuits, in particular from 2 and 3 evident.

These connections 64 exist for example in with the third housing 62 integral urgeformten pipe socket, in whose openings internal thread for corresponding external thread of fittings of the connected pipes and lines are formed. At the third case 62 is still a fastening device 66 for fastening the compressed air supply device 1 formed on the frame of the commercial vehicle, for example in the form of one or more screw eyes. Thus, the preferred embodiment described herein will be one Compressed air supply system 1 preferably only on the first housing 6 and on the third housing 62 by means of appropriate fastening devices 12 . 66 held on the frame of the utility vehicle, while the second housing 22 has no such fastening device. Alternatively, the compressed air supply device could 1 also only via the fastening device 12 on the first housing 6 or the fastening device 66 on the third housing 62 be held, which then results in a cantilevered position.

In particular 3 illustrates, the second housing 22 between the first housing 6 and the third housing 62 on the one hand in the first housing 6 and on the other hand in the third housing 62 countered tie rod 68 held. Because the two valve blocks 20 . 36 and the third housing 62 in relation to the plane of the connection plate 14 of the first housing 6 via this connection plate 14 extend laterally, are the tie rods 68 also in the standing plate 24 anchored. 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 3 shows, includes the second housing 22 in addition an intermediate plate 70 , which between the second valve block 36 and the third housing 62 is arranged and which has openings or flow channels, which openings or flow channels in the second valve block 36 with openings or flow channels in the third housing 62 connecting with each other, which with the connections 64 are connected for the compressed air circuits of the compressed air consumers. The intermediate plate 70 , which also represents an injection molding of plastic and parallel to the connection plate 14 , The two valve blocks and the plate-shaped third housing is arranged, supports or counters on the one hand, components of at least some valves of the valve device 26 passing through openings of the second valve dome 38 in the second valve block 36 protrude. These components are, for example, valve seats, which are then in the intermediate plate 70 are integrally formed and urformed with this.

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

As already between the valve blocks are on the one hand the second valve block 36 and the intermediate plate 70 and the intermediate plate 70 and the third housing 62 also molded gaskets 40 sealingly interposed, which with their closure parts 42 at least one opening or a flow channel of the intermediate plate 70 seal tightly. The seal parts 46 the molded gaskets 40 are in turn also in grooves in the second valve block 36 , in the intermediate plate 72 as well as in the third housing 62 guided and fixed. Then depending on the location or execution of the mold seal concerned 40 certain flow paths closed or released.

The second housing 22 Therefore here includes the two valve blocks 20 . 36 as well as the intermediate plate 70 as well as the form seals 40 , wherein preferably all these Ge components are made of plastic or 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 to thick-walled parts 20 . 36 . 70 to produce with a wall thickness of more than 2.5 mm.

The first case 6 and the third housing 62 In contrast, consist of metal, preferably aluminum, with these housings 6 . 62 connections 10 . 64 preferably formed in one piece urgeformt at least for the compressor and the compressed air consumer circuits, because the connections 10 . 64 that z. B. are designed as pipe socket with internal thread, have to meet higher requirements for strength and rigidity.

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

Therefore, in the compressed air supply device 1 Metal housing or metal components 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 made of plastic housing components in Sandwich construction between the first housing 6 made of metal and the third housing 62 is held of metal and the power transmission and introduction of force from the composite or the sandwich construction in the structure of the motor vehicle, for example, exclusively by the existing metal first housing 6 and third housing 62 he follows.

This allows for that of the first housing 6 and the third housing 62 included or embraced second housing 22 or for its housing components 20 . 36 and 70 Plastics with relatively low strength (tensile strengths <200 N / mm ² , but higher compressive strength) are 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 recorded.

LIST OF REFERENCE NUMBERS

1

Compressed air supply system

2

Luftrocknereinrichtung

4

Air dryer cartridge

6

first housing

8th

fastening device

10

connection

12

fastening device

14

connecting plate

16

flow opening

18

flow opening

20

first valve block

22

second housing

24

deepening plate

26

valve means

28

first valve dome

30

valve seat

32

valve body

34

compression springs

36

second valve block

38

second valve dome

40

shaped seal

42

closing part

44

first flow opening

46

ring part

48

first groove

50

web

52

sealing lip

54

burl

56

second flow opening

58

third flow opening

60

Control electronics

62

third case

64

connections

66

fastening device

68

tie rods

70

intermediate plate

72

valve seat

74

chamber

76

first surface

78

second surface

80

flow channel

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3910381 A1 [0002, 0006]

Claims (15)

Pressure medium device ( 1 ) of a vehicle, in which a pressure medium flows, having a multilayer structure, which has at least two layers in contact with one another, wherein in a first area ( 76 ) a first layer ( 20 ) at least three flow openings ( 44 . 56 . 58 ) of flow channels for the pressure medium, which a second surface ( 78 ) one to the first layer ( 20 ) adjacent second layer ( 36 ), whereby 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 with the ring part ( 46 ) connected closure part ( 42 ), which is used for the sealing closure of at least one of the flow openings ( 44 . 56 . 58 ) in the first area ( 76 ), characterized in that a) the ring part ( 46 ) annularly formed circumferentially and the at least one closure part ( 42 ) within the ring part ( 46 ), and b) the ring part ( 46 ) a chamber through which pressure medium can flow ( 74 ), which continues through the first area ( 76 ) and through the second surface ( 78 ), where c) is a group of molded seals ( 40a . 40b . 40c ) each having a different position of the at least one closure part ( 42 ) in relation to the ring part ( 46 ) and depending on one of the group of molded seals ( 40a . 40b . 40c ), between the two layers ( 20 . 36 ) assembled form seal ( 40a . 40b or 40c ) at least one other flow opening ( 44 . 56 . 58 ) by the at least one closure part ( 42 ) and thus each a different flow connection between at least two openings ( 44 . 56 respectively. 44 . 58 respectively. 56 . 58 ) of the at least three flow openings ( 44 . 56 . 58 ) within the chamber ( 74 ), or wherein d) the molded seal ( 40 ) is formed and the flow openings ( 44 . 56 . 58 ) in the first area ( 76 ) are arranged such that, depending on the rotational position of this molded seal ( 40 ) at least one other flow opening ( 44 or 56 or 58 ) by the at least one closure part ( 42 ) and a respective other flow connection between at least two openings ( 44 . 56 respectively. 44 . 58 respectively. 56 . 58 ) of the at least three openings ( 44 . 56 . 58 ) within the chamber ( 74 ) is realized. Pressure medium device ( 1 ) according to claim 1, characterized in that at least one of the layers ( 22 . 36 ) is plate-shaped. Pressure medium device ( 1 ) according to claim 1 or 2, characterized in that at least one of the layers ( 20 . 36 ) a housing or a housing component of the pressure medium device ( 1 ). Pressure medium device ( 1 ) according to one of the preceding claims, characterized in that the ring part ( 46 ) in one piece with the at least one closure part ( 42 ) is executed. Pressure medium device ( 1 ) according to one of the preceding claims, characterized in that the closure part ( 42 ) represents a circular plate-shaped plug, which by a web ( 50 ) with the ring part ( 46 ) connected is. Pressure medium device ( 1 ) according to one of the preceding claims, characterized in that the molded seal ( 40 ; 40a . 40b . 40c ) consists of an elastomer. Pressure medium device ( 1 ) according to one of the preceding claims, characterized in that the ring part ( 46 ) in at least one of the first surface ( 76 ) and / or on the second surface ( 78 ) formed recess or groove ( 48 ) is recorded. Pressure medium device ( 1 ) according to one of the preceding claims, characterized in that at least the ring part ( 46 ) of the molded gasket ( 40 ; 40a . 40b . 40c ) between the first surface ( 76 ) and the second surface ( 78 ) is held biased. Pressure medium device ( 1 ) according to one of the preceding claims, characterized in that at least the ring part ( 46 ) is elastic. Pressure medium device ( 1 ) according to one of the preceding claims, characterized in that the ring part ( 46 ) is elastic and can take any circumferential shape, wherein the flow openings ( 44 . 56 . 58 ) in the first area ( 76 ) of the first layer ( 20 ) are arranged so that they in changed rotational positions of the molded seal ( 40 ) by the at least one closure part ( 42 ) are closable. Pressure medium device ( 1 ) according to one of the preceding claims, characterized in that the closure part ( 42 ) between the closed flow opening ( 44 . 56 . 58 ) and the second surface ( 78 ) is held under prestress. Pressure medium device ( 1 ) according to one of the preceding claims, characterized in that the pressure medium is formed by compressed air. Pressure medium device ( 1 ) according to claim 12, characterized in that it comprises a compressed air supply device for vehicle Comprises 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 ) as well as several layers or housing components ( 6 . 20 . 22 . 36 . 62 ), in or at which the aforementioned components or assemblies are housed. Pressure medium device ( 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 operating device. Vehicle containing a pressure medium device ( 1 ) according to any one of the preceding claims.

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