EP3454973A1

EP3454973A1 - Compressed-air preparation system, in particular for a compressed-air preparation unit of a utility vehicle

Info

Publication number: EP3454973A1
Application number: EP17723080.2A
Authority: EP
Inventors: Andreas Leinung; Andreas Ochsenkühn; Stefan SCHÄBEL; Günther Reifinger
Original assignee: Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Current assignee: Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Priority date: 2016-05-13
Filing date: 2017-05-11
Publication date: 2019-03-20
Also published as: KR20190008330A; WO2017194671A1; JP2019516546A; CN109475805A; DE102016208355A1; BR112018072852A2; RU2700995C1

Abstract

A compressed-air preparation system for a compressed-air preparation unit of a utility vehicle has a compressed-air preparation device (30), an air-dryer cartridge (10) and a sealing ring (68) to provide a seal between the air-dryer cartridge (10) and the compressed-air preparation device (30). The air-dryer cartridge (10) has a cartridge casing (14) with a closed casing lid (16), a desiccant (60) contained in the cartridge casing (14), an attachment flange (18) for closing an open end face, facing the casing lid (16), of the cartridge casing (14) and for attaching the air-dryer cartridge (10) to the compressed-air preparation device (30), and a bottom plate (26). The bottom plate (26) is arranged on that side of the attachment flange (18) that is oriented away from the casing lid (16) of the cartridge casing (14), and has a receiving section (72), extending away from the attachment flange (18), for forming a sealing ring receiving portion (70) for receiving the sealing ring (68) on that side of the receiving section (72) that is oriented toward a longitudinal axis (12) of the air-dryer cartridge. In that context, the receiving section (72) for the sealing ring (68) provides, in a radial direction (13r) perpendicular to the longitudinal axis (12) of the air-dryer cartridge (10), an outer bearing face and the receiving section (72) extends, on a side oriented away from the cartridge casing (14), at least partially below the sealing ring (68).

Description

DESCRIPTION

Compressed air treatment system, in particular for a compressed air treatment plant of a commercial vehicle

The present invention relates to an air dryer cartridge and a compressed air treatment device and a compressed air treatment system comprising such a compressed air treatment device and such an air dryer cartridge, in each case in particular for a compressed air treatment plant of commercial vehicles.

Such compressed air treatment systems are used for example in commercial vehicles such as trucks and tractors. These often have one or more compressed air consumers such as brake systems or air suspensions that need to be supplied with compressed air. The compressed air is typically provided by a compressor, for example a reciprocating compressor driven by a drive motor of the vehicle. To ensure a trouble-free operation of the compressed air consumers, the compressed air provided by the compressor usually has to be further processed. In the compressed air treatment plants provided for this purpose, the compressed air is cleaned of dirt particles that were already contained in the intake air, as well as oil and soot particles that are introduced by the compressor into the compressed air during the compression process, and moisture is deposited in the compressed air. For this purpose, the compressed air treatment systems of commercial vehicles usually have air dryer cartridges that dehumidify the compressed air and can also absorb oil and dirt particles.

Conventional air dryer cartridges, as disclosed for example in DE 10 2013 103 066 A1, have a cartridge housing with a closed housing cover, a received in the cartridge housing desiccant and a

Mounting flange for closing a housing cover facing away from the open end of the cartridge housing and attaching the air dryer cartridge to a compressed air conditioning device. It is usually at the

Housing cover facing away from the end of the air dryer cartridge also a floor panel provided, on the one hand connected to the mounting flange and on the other hand connected to the cartridge housing by means of a flange. This base plate is shaped such that it forms an annular receptacle on its side facing away from the mounting flange, in which a square sealing ring is inserted or can be used, which is intended to effect a seal between the air dryer cartridge and the compressed air treatment device.

The invention has for its object to provide an improved compressed air treatment system, which simplifies mounting the sealing ring on the air dryer cartridge and mounting the air dryer cartridge to the compressed air treatment device.

This object is achieved by the teaching of the independent claims. Advantageous embodiments of the invention are the subject of the dependent claims.

The air dryer cartridge according to the invention has a cartridge housing with a closed housing cover, a received in the cartridge housing

Desiccant, a mounting flange for closing a housing cover facing away from the open end of the cartridge housing and attaching the air dryer cartridge to a Duckluftaufbereitungsvorrichtung and at the

Housing cover of the cartridge housing facing away from the end face of the air dryer cartridge provided and arranged on the housing cover of the cartridge housing side facing away from the mounting flange bottom plate. The bottom plate has a receiving portion extending away from the attachment flange for forming a sealing ring receptacle for receiving a sealing ring on the side of the receiving portion facing a longitudinal axis of the air dryer cartridge. This receiving portion provides an external system for a sealing ring to be received in the sealing ring in a radial direction perpendicular to the longitudinal axis of the air dryer cartridge. In addition, this receiving portion extends on a side facing away from the cartridge housing at least partially below a male in the sealing ring receiving sealing ring. According to the invention, it is proposed to arrange a specially shaped bottom plate on the side facing away from the housing cover of the cartridge housing side of the mounting flange. By means of a receiving section extending away from the fastening flange, the floor panel forms a sealing ring receptacle into which the sealing ring can be inserted. Since the receiving portion of the bottom plate engages under the sealing ring at least partially, the sealing ring can be advantageously held without jamming in the sealing ring receptacle so that it can be easily and safely pre-assembled before mounting the air dryer cartridge to a compressed air treatment device. As a result, the mounting of the air dryer cartridge on a compressed air treatment device can be simplified as a whole, since additional and / or expensive process steps for prefixing the sealing ring can be dispensed with.

In the sealing concept according to the invention, the sealing ring is preferably received and pressed in a wedge-shaped sealing ring receptacle. When mounting the air dryer cartridge on a compressed air treatment device, the sealing ring wedged advantageously in this seal ring recording, the assembly can be done with lower screw forces than conventional systems. On the other hand, the sealing ring in the wedge-shaped sealing ring receptacle can build up a higher sealing effect under pressure during operation, since it presses the compressed air advantageously into the wedge shape.

In an advantageous embodiment of the invention, the receiving portion of the bottom plate extends with a free end of the bottom plate to below a male in the sealing ring receiving sealing ring. In this embodiment, the sealing ring receptacle may be preferably configured to receive a sealing ring between the bottom plate and the mounting flange.

In another advantageous embodiment of the invention, the receiving portion of the floor panel is formed by a bent back on itself portion of the floor panel. In this embodiment, the sealing ring receptacle can preferably be configured for receiving a sealing ring between the bottom plate and a compressed air treatment device. In addition, in this embodiment Preferably, a free end of the bottom plate at least partially surround a portion of the mounting flange, for example, through an air flow opening in the mounting flange, to a frictional connection between the

Bottom plate and the mounting flange to achieve.

In a further advantageous embodiment of the invention, the bottom plate has at least one toothed element, which can be brought into engagement with the side facing away from the housing cover of the cartridge housing side of the mounting flange. The toothed elements are configured, for example, in the form of imprints or profiles in the floor panel. With such teeth elements, a frictional connection between the bottom plate and the mounting flange can be improved, which when screwing the air dryer cartridge with the attachment piece of the

Mounting flange on a compressed air treatment device is advantageous. In an advantageous embodiment of the invention, the receiving portion of

Floor plate formed at least partially curved. With this construction, the sealing ring receiver can be advantageously used for receiving sealing rings with curved surfaces. In particular, with this construction, preferably O-ring seals can be used. O-ring seals are cheaper compared to rectangular seals. In the context of the invention, however, basically any desired sealing shapes can be used, such as, for example, rectangular, square, triangular, polygonal, circular, oval or similar cross-sectional shapes. In a further advantageous embodiment of the invention, the mounting flange is designed at its outer side facing away from the housing cover of the cartridge housing at least in the region of the sealing ring receiving substantially planar. This construction of the mounting flange is particularly easy to manufacture and therefore inexpensive. In addition, a large flat section or an overall flat mounting flange permits variable positioning of the sealing ring at radially different positions, in that only the floor panel has to be adapted. In a further advantageous embodiment of the invention, the floor panel has a connecting portion for connection to the cartridge housing, wherein the connecting portion extends away from the mounting flange, for example in a longitudinal direction substantially parallel to the longitudinal axis of the air dryer cartridge. With this construction, the dimensional stability of the floor panel can be increased overall. As a result, the floor panel can be thinner and / or made of a less dimensionally stable material.

Preferably, the bottom plate is connected to the cartridge housing, preferably via a connecting portion. This compound can preferably by a

Flanging, welding, soldering, gluing or a combination of these joining techniques be realized. Alternatively, this connection can also be implemented by a one-piece design of the cartridge housing with the floor panel. The bottom plate is preferably configured in one piece and manufactured. Alternatively, however, the floor panel can also be assembled from a plurality of components, for example a first floor panel part in the form of a conventional floor panel or floor panel section and a second floor panel part in the form of a specially designed according to the invention adapter.

The compressed air treatment device according to the invention has a connection piece for fastening an air dryer cartridge to the compressed air treatment device, wherein a longitudinal axis of the connection piece extends substantially coaxially to a longitudinal axis of the air dryer cartridge when the air dryer cartridge is attached to the compressed air treatment device. The compressed air treatment device according to the invention further comprises a pressure section, which is provided in the radial direction perpendicular to the longitudinal axis of the air dryer cartridge outside the connecting piece. This pressure portion has a support projection extending toward the air dryer cartridge positioned radially relative to the longitudinal axis of the air dryer cartridge within a sealing ring to be received between the air conditioning apparatus and the air dryer cartridge and providing internal engagement for a male sealing ring in the radial direction. According to the invention it is proposed to equip the compressed air treatment device radially outside the connecting piece with a special pressure section. Due to the support projection, which holds the sealing ring in the radial direction in position, additional and / or complex measures for prefixing the sealing ring on the air dryer cartridge or the compressed air treatment device prior to assembly of the air dryer cartridge on the compressed air conditioning device can be omitted. As a result, the assembly of an air dryer cartridge on the compressed air treatment device is simplified.

In an advantageous embodiment of the invention, the support projection of the pressure section is dimensioned such that it is spaced in the assembled state of the air dryer cartridge in a longitudinal direction parallel to the longitudinal axis of the air dryer cartridge from the air dryer cartridge. With this construction, it can be ensured that the supporting projection does not hinder mounting of an air dryer cartridge on the compressed air processing device by limiting a communication path of the connecting piece. As a result, it can be ensured that the sealing ring inserted between the air dryer cartridge and the compressed air treatment device is pressed with sufficient pressure force and thus achieves a sufficient sealing effect.

In an advantageous embodiment of the invention, the pressure section has a supporting edge, which extends radially outward from the support projection, so that this support edge extends in the installed state of the air dryer cartridge on a side facing away from the air dryer cartridge at least partially below a male sealing ring. This supporting edge of the pressure section can thus form an additional support for an inserted sealing ring in the longitudinal direction.

In an advantageous embodiment of the invention, the pressure section in the radial direction outside of the support projection on a recess which is set back relative to the support edge. For example, a free end of a floor panel attached to the air dryer cartridge for receiving the seal ring may be received in this recess. Preferably, this depression of the pressure designed trapezoidal or wedge-shaped portion to provide a better stop for the free end of the bottom plate, which also allows greater manufacturing tolerances of the components involved. The pressure section is preferably designed in one piece with the compressed air treatment device. Optionally, the pressure section can also be provided in the form of an adapter as a separate component, which is attached to the compressed air treatment device, for example screwed. The invention also relates to a compressed air treatment system with a compressed air treatment device according to the invention described above, an air dryer cartridge according to the invention described above and a sealing ring for sealing between the air dryer cartridge and the compressed air treatment device. The advantages of the air dryer cartridge described above are particularly useful in combination with a compressed air conditioner described above. Likewise, the advantages of the above-described compressed air treatment device are particularly useful in combination with an air dryer cartridge described above. The specially shaped bottom plate on the air dryer cartridge and the specially shaped pressure section of the compressed air treatment device sandwich the sealing ring and press the sealing ring so that it ensures a secure and sufficient seal between the air dryer cartridge and the compressed air preparation device. In addition, the sealing ring can be easily inserted between the bottom plate and the mounting flange of the air dryer cartridge and then the air dryer cartridge can be easily mounted on the compressed air preparation device before mounting the air dryer cartridge to the compressed air treatment device. In principle, however, the air dryer cartridge according to the invention and the compressed air treatment device according to the invention can also be used independently of one another in an advantageous manner. The sealing ring is preferably designed as an O-ring with a circular cross-section. As mentioned above, the invention is not limited to a sealing ring with this cross-sectional shape. In one embodiment of the invention may further be arranged an elastic element between the air dryer cartridge and the support projection of the pressure section of the compressed air treatment device. This embodiment may be particularly advantageous in the case of a backward-compatible use of the air dryer cartridge in combination with conventional compressed air treatment devices. By way of the interposed elastic element, which can optionally also be prefixed to the air dryer cartridge, it can advantageously be ensured that the connection between the air dryer cartridge and the compressed air treatment device is retightened and the inserted rectangular sealing ring can be further compressed. The present invention is particularly suitable for use in compressed air treatment systems of a commercial vehicle advantageous.

The above and other advantages, features and applications of the invention will become more apparent from the following description of various embodiments with reference to the accompanying drawings. The drawings show, for the most part schematically, a partial sectional view of a compressed air preparation system according to a first exemplary embodiment of the invention; an enlarged detail view of a connection between an air dryer cartridge and a compressed air treatment device of the compressed air treatment system of Figure 1 according to an embodiment of the invention. an enlarged detail view of an alternative connection between an air dryer cartridge and a compressed air treatment device according to another embodiment of the invention; 4 is a partial sectional view of a compressed air treatment system according to a second embodiment of the invention; 5 is an enlarged detail view of a connection between an air dryer cartridge and a compressed air treatment device of the compressed air treatment system of Figure 4 according to an embodiment of the invention. 6 is an enlarged detail view of an alternative connection between a

Air dryer cartridge and a compressed air treatment device according to another embodiment of the invention; an enlarged detail view of an alternative connection between an air dryer cartridge and a compressed air treatment device according to a still further embodiment of the invention;

8 is an enlarged detail view of an alternative connection between a

Air dryer cartridge and a compressed air treatment device according to a still further embodiment of the invention; and

9 is a partial sectional view of a compressed air treatment system according to a third embodiment of the invention. Fig. 1 shows the structure of a compressed air treatment system with an air dryer cartridge according to the invention and a compressed air treatment device according to the invention according to a first embodiment.

The air dryer cartridge 10 is substantially rotationally symmetrical to a longitudinal axis 12 and has a substantially cylindrical or cup-shaped cartridge housing 14 with a closed housing cover 1 6, which is designed in the form of a deep-drawn sheet metal. The housing cover 1 6 facing away from the open end of the cartridge housing 14 is provided with a mounting flange 18th (preferably made of metal) closed. The mounting flange 18 is preferably fixedly and fluid-tightly connected to the cartridge housing 14, for example, welded, glued or the like. The fastening flange 18 has, for example, an annular inlet opening 20 or a plurality of inlet openings 20 arranged along a circular ring and an, for example, circular, central outlet opening 24. The outlet opening 24 is arranged in the radial direction transversely to the longitudinal axis 12 within the inlet opening (s) 20. The terms "inlet" and "outlet" in this context refer to the fluid flow direction a through the air dryer cartridge during normal operation to dry and purify the fluid. In the regeneration mode, the air dryer cartridge 10 and thus the inlet and outlet openings 20, 24 are flowed through in the reverse direction b. The central outlet opening 24 is delimited by a fastening neck 22 of the fastening flange 18. This attachment piece 22 is provided with an internal thread.

The air dryer cartridge 10 is mounted on a compressed air treatment device 30 which is part of a compressed air treatment plant. The compressed air treatment device 30 has a connecting piece 32 which is provided with an external thread. The air dryer cartridge 10 can be screwed to the attachment piece 22 of its mounting flange 18 on the connecting piece 32 of the compressed air conditioning device 30. The screw 34 between the attachment piece 22 and the connecting piece 32 forms a detachable, but fluid-tight connection between the air dryer cartridge 10 and the compressed air treatment device 30. In the mounted state, the longitudinal axis 12 of the air dryer cartridge 10 and the longitudinal axis of the connecting piece 32 of the compressed air treatment device 30 are coaxial.

The compressed air treatment device 30 has an annular first orifice 36 or a plurality of orifices 36 arranged along a circular ring, for example, which in the installed state of the air dryer cartridge 10 are in fluid communication with the inlet Opening 20 / the inlet openings 20 of the mounting flange 18 stands / stand. The compressed air treatment device 30 further has, for example, a circular second opening 38, which in the assembled state of the air dryer cartridge 10 is in fluid communication with the outlet opening 24 of the mounting flange 18. The arrows a symbolize the fluid flow direction during normal operation of the air dryer cartridge 10, and the arrows b symbolize the fluid flow direction in the regeneration operation of the air dryer cartridge 10th

As shown in Fig. 1, the air dryer cartridge 10 also has an inner housing 40 which consists of a first part 40a and a second part 40b and is preferably formed of a plastic material. The first part 40a of the inner

Housing 40 is arranged in the radial direction transversely to the longitudinal axis 12 outside of the second part 40 b of the inner housing 40. In the embodiment of Fig. 1, the cartridge housing 14 and the inner housing 40 form between them a receiving space for a desiccant 60 (eg silica gel).

The first part 40 a of the inner housing 40 is provided at a wall portion with a plurality of openings 42 which are in fluid communication with the inlet opening 20 of the mounting flange 18. During normal operation of the air dryer cartridge 10, the compressed air from the compressed air treatment device 30 can flow through the inlet opening 20 in the mounting flange 18 and the openings 42 of the inner housing 40 into the interior of the cartridge housing 14.

Between the inlet opening (s) 20 and the openings 42, a filter device 44 is set in the form of a coalescence filter or oil filter. The filter device 44 is in this embodiment, for example, aligned substantially parallel to the longitudinal axis 12 of the air dryer cartridge 10, so that it is flowed through in the radial direction of the compressed air. By means of the filter device 44, the compressed air before it flows through the desiccant 60 in the cartridge housing 14 of the air dryer cartridge 10, be cleaned. The filter device 44 is preferably surrounded by a so-called wicking material 46, which may be formed by a porous material, a nonwoven material, etc. and is permeable to air. The wicking material 46 prevents oil contamination of the desiccant 60. Below the filter device 44, a bypass 48 is provided with a check valve 52. The check valve 52 prevents in normal operation of the air dryer cartridge 10 that compressed air flows from the inlet port 20 past the filter device 44 through the bypass 48 unpurified in the desiccant 60, but allowed in

Regeneration operation of the air dryer cartridge 10 an air flow past the filter device 44. The check valve 52 is preferably formed of a plastic material (eg, an elastomer). It is supported on the cartridge housing 14 in this embodiment.

As shown in Fig. 1, a sealing lip 54 is provided on the first part 40a of the inner housing 40 in the region of the attachment piece 22, which is preferably formed integrally therewith and is preferably resiliently biased against the attachment piece 22. Similarly, a sealing lip is provided in the region of the cartridge housing 14, which is preferably formed integrally with the first part 40 a of the inner housing 40 and is preferably resiliently biased against the cartridge housing 14.

The second part 40b of the inner housing 40 has openings 56 in the central region, which connect the interior of the cartridge housing 14 with the outlet opening 24. At the radially outer peripheral edge of the second part 40 b, a sealing lip 58 is provided, which is preferably formed integrally therewith and is preferably resiliently biased against the first part 40 a of the inner housing 40. The second part 40b of the inner housing 40 is movable in the axial direction, ie parallel or coaxial with the longitudinal axis 12 of the air dryer cartridge 10 in the cartridge housing 10. By means of a biasing element 62 in the form of a compression spring, which is supported against the first part 40 a of the inner housing 40, the second part 40 b of the inner housing 40 is pressed in the direction of the housing cover 1 6 in order to compress the desiccant 60. By the sealing lip 58 on the second part 40b while the inner housing 40 remains fluid-tight between its two parts 40a, 40b. As can be seen in FIG. 1, the second part 40b of the inner housing 40 is configured such that a part of the desiccant 60 is arranged in a spatial area 66 in the radial direction within the biasing element 62. As a result of this optimum utilization of space inside the cartridge housing 14, the air dryer cartridge 10 can be made smaller, ie with a smaller diameter and / or a smaller height, for the same drying performance.

In order to achieve a fluid-tight seal between the compressed air treatment device 30 and the air dryer cartridge 10 in the radial direction, a sealing ring 68, for example, an O-ring seal is arranged between these two elements.

2 shows a first embodiment of this connection between air dryer cartridge 10 and compressed air treatment device 30 in an enlarged partial view. As shown in FIGS. 1 and 2, on the housing cover 1 6 of the cartridge housing 14 facing away from the air dryer cartridge 10, more precisely on the housing cover 1 6 of the cartridge housing 14 facing away from the outside (bottom in Fig. 1 and 2) of the mounting flange 18 a Bottom plate 26 is provided. This base plate 26 is connected to the cartridge housing 14 by means of a connecting section 27. In the embodiment of FIGS. 1 and 2, this connection 28 is realized by a flange.

Starting from the connecting portion 27 at the outer end in the radial direction 13r, the bottom plate 26 initially extends in the radial direction 13r along the

Mounting flange 18 inside. In this case, the bottom plate 26 may also be connected to the mounting flange 18, for example, welded, soldered or glued. If no firm connection between base plate 26 and mounting flange 18 is provided, the bottom plate preferably has a plurality of toothed elements 29, which can engage in the assembly of the air dryer cartridge 10 on the compressed air treatment device 30 in the bottom of the mounting flange 18 to a corresponding frictional connection between the two To produce components 18, 26. The toothed elements 29 are formed, for example, as embossments or profiles in the base plate 26. At its in the radial direction 13r inner end region, which is still outside the inlet opening (s) 20 of the mounting flange 18 in the radial direction, the bottom plate 26 has a receiving portion 72. The receiving portion 72 is curved in this embodiment and extends from the

Mounting flange 18 away. This receiving portion 72 forms a wedge-shaped sealing ring receptacle 70 for receiving a sealing ring 68, which may be configured in the case of the curved receiving portion 72 preferably as an O-ring seal. The receiving portion 72 of the bottom plate 26 extends at least partially below the sealing ring 68 inserted into the sealing ring receptacle 70.

The mounting flange 18 of the air dryer cartridge 10 is preferably configured substantially planar, so that it has a flat outer side, at least also in the region of the sealing ring seat 70 formed by the bottom plate 26.

Before the air dryer cartridge 10 is mounted on the compressed air treatment device 30, the sealing ring 68 can be easily inserted in the radial direction from the inside into the sealing ring receptacle 70 between the bottom plate 26 and the mounting flange 18. The sealing ring 68 is held on the air dryer cartridge 10 until it is mounted on a compressed air treatment device 30.

In order to press the sealing ring 68 in the assembly of the air dryer cartridge 10 to the compressed air treatment device 30 and thus to achieve a sealing effect between the air dryer cartridge 10 and the compressed air treatment device 30 in the radial direction 13r, the compressed air treatment device 30 has a specially shaped pressure section 75 which cooperates with the bottom plate 26 and the mounting flange 18 holds the sealing ring 68 in the desired position within the sealing ring receptacle 70 and pressed. As shown in FIG. 1, this pressure section 75 is provided in the radial direction perpendicular to the longitudinal axis 12 of the air dryer cartridge 10 outside the connecting piece 32 of the compressed air treatment device 30. As can be seen in particular in FIG. 2, the pressure section 75 has a support edge 82, which is formed, for example, as an end of an edge 80 of the pressure section 75 facing the air dryer cartridge 10. In addition, the pressure section 75 has a support projection 76 extending in the direction of the air dryer cartridge 10. This support projection 76 is positioned in the radial direction within the male sealing ring 68 and forms a radially inner abutment for the sealing ring 68th

To exert a sufficient contact pressure force F on the sealing ring 68, so that it achieves a sufficient sealing effect, the support projection 76 of the pressure section 75 extends from the support edge 82 by a degree in the direction of the air dryer cartridge, which is smaller than a dimension of the sealing ring 68 in one Longitudinal direction 131 parallel to the longitudinal axis 12 of the air dryer cartridge in unmounted

State of the air dryer cartridge 10. Preferably, this dimension is even smaller than a dimension of the sealing ring 68 in a longitudinal direction 131 parallel to the longitudinal axis 12 of the air dryer cartridge in the assembled state of the air dryer cartridge 10 so that in the assembled state of the air dryer cartridge 10, a small distance between the mounting flange 18 and the support projection 76 of the pressure section 75 remains.

Further, the pressure portion 75 has a recess 84 in the radial direction 13r between the support edge 82 and the support projection 76. This recess 84 is also set back relative to the support edge 82, so that during assembly of the air dryer cartridge 10 on the compressed air treatment device 30, the free end 74 of the bottom plate 26th can be received in this recess 84 and possibly also be supported in this recess.

When screwing the air dryer cartridge 10 with the compressed air conditioning device 30 presses the pressure section 75 with its support edge 82 against the

Bottom plate 26 and discards the sealing ring 68 slightly upwards in the direction of the air dryer cartridge 10, wherein the sealing ring 68 between the bottom plate 26 and the mounting flange 18 is slightly compressed, but applied in comparison to conventional sealing concepts with rectangular sealing rings in annular grooves of the bottom plate lower bolting forces Need to become. In this case, the sealing ring 68 through the receiving portion 72 of the bottom plate 26 and the support projection 76 of the pressure portion 75 in the radial direction 13r held in position. In operation, the

Compressed air, the sealing ring 68 in the wedge-shaped sealing ring receptacle 70 down in the direction of the compressed air treatment device 30, which further increases the sealing effect of the sealing ring 68. It is thus achieved a fluid-tight seal in the radial direction 13r between the compressed air treatment device 30 and the air dryer cartridge 10.

FIG. 3 shows an alternative embodiment of the connection between air dryer cartridge 10 and compressed air treatment device 30 in an enlarged partial view analogously to the illustration of FIG. 2.

In this embodiment, an air dryer cartridge 10 according to the present invention (for example, as shown in Fig. 1) is provided with a conventional compressed air treatment device 30

connected. In other words, the air dryer cartridge 10 of the invention is also backward compatible with conventional compressed air treatment devices 30.

As shown in Fig. 3, the bottom plate 26 is designed for this purpose such that it forms an annular groove between the connecting portion 27 and the receiving portion 72, in which a rectangular cross-section sealing ring 69 used / can be pressed. The conventional compressed air treatment device 30 is designed substantially flat on its side facing the air dryer cartridge 10 in the region of the bottom plate 26, so that the sealing ring 69 is pressed against this plane compressed air treatment device 30.

In the embodiment of FIG. 3, the sealing ring receptacle for the rectangular sealing ring 69 is formed by the connecting portion 27 and the receiving portion 72 of the floor panel 26. In an alternative embodiment (not shown), this sealing ring receptacle can also be formed by additional mold sections of the floor panel 26.

4 and 5 show the structure of a compressed air treatment system with an air dryer cartridge according to the invention and a compressed air Processing device according to a second embodiment. The same components and components are identified by the same reference numerals as in the above embodiment. The second embodiment differs from the embodiment described above by the construction of the connection between the air dryer cartridge and the compressed air treatment device and the sealing thereof.

Thus, in particular, the bottom plate 26 of the air dryer cartridge 10 is shaped differently than in the first embodiment. The receiving portion 72 of the floor panel 26 is formed by a self-bent portion of the floor panel 26. The free end 74 of the floor panel 26 is located between the sealing ring receptacle 70 and the mounting flange 18, i. in the longitudinal direction 131 above the sealing ring 68 inserted into the sealing ring receptacle 70.

The pressure section 75 of the compressed air treatment device 30 is made simpler compared to the first embodiment. In particular, the support edge 82 extending outward from the support projection 76 in the radial direction 13r below the sealing ring receptacle 70 can be dispensed with.

In this embodiment, the sealing ring 68 is received in a sealing ring receptacle 70, which is formed between the bottom plate 26 and the support projection 76 of the pressure section 75 of the compressed air treatment device 30. FIG. 6 shows, analogously to the representation of FIG. 5, an alternative embodiment of the invention

Connection between air dryer cartridge 10 and compressed air treatment device 30 in an enlarged partial view.

In this embodiment, an air dryer cartridge 10 according to the invention (eg according to FIG. 4) is connected to a conventional compressed air treatment device 30. In other words, the air dryer cartridge 10 of the invention is also backward compatible with conventional compressed air conditioners 30. As shown in Fig. 3, the bottom plate 26 is designed for this purpose such that it forms an annular groove between the connecting portion 27 and the receiving portion 72, in which a rectangular cross-section sealing ring 69 used / can be pressed. The conventional compressed air treatment device 30 is designed substantially flat on its side facing the air dryer cartridge 10 in the region of the bottom plate 26, so that the sealing ring 69 is pressed against this plane compressed air treatment device 30.

In the embodiment of FIG. 3, the sealing ring receptacle for the rectangular sealing ring 69 is formed by the connecting portion 27 and the receiving portion 72 of the floor panel 26. In an alternative embodiment (not shown), this sealing ring receptacle can also be formed by additional mold sections of the floor panel 26. In other words, the embodiment of FIG. 6 represents a combination of the embodiments of FIG. 5 with FIG. 3.

FIG. 7 shows a further alternative embodiment of the connection between the air dryer cartridge 10 and the compressed air treatment device 30 in an enlarged partial view analogously to the illustration of FIG. 5.

In this embodiment, the free end 74 of the floor panel 26 through the

Inlet opening 20 is guided in the mounting flange 18 and surrounds the

Mounting flange 18. This creates a sufficiently strong connection between the bottom plate 26 and the mounting flange 18.

As shown in FIG. 7, a support edge 33 can optionally be provided on the attachment stub 32 of the compressed-air preparation device 30, which extends outward from the attachment stub 32 in the radial direction 13r and on which the attachment flange 18 can be supported in the assembled state of the air-dryer cartridge 10 , As further shown in Fig. 7, may be provided on the support projection 76 of the pressure section 75 of the compressed air treatment device 30 optionally a support edge 82 which extends in the radial direction 13r of the support projection 76 below the inserted sealing ring 68 to the outside.

These embodiments of FIG. 7 are analogously applicable to the embodiment of FIG. 6.

FIG. 8 shows a further alternative embodiment of the connection between air dryer cartridge 10 and compressed air treatment device 30 in an enlarged partial view analogously to the illustration of FIG. 2.

In this embodiment, the recess 84 between the support edge 82 and the support projection 76 of the pressure section 75 of the compressed air treatment device 30 is designed substantially trapezoidal.

The trapezoidal shape of the recess 84 allows improved abutment or guidance of the free end 74 of the floor panel 26 therein, particularly during assembly of the air dryer cartridge 10 on the Druckluftaufbereitungs- device 30. Even with larger manufacturing tolerances, the free end of the floor panel 26 safely his Path to the end position in the recess 84 find.

In addition, so too much bending of the bottom plate 26 during assembly of the air dryer cartridge 10 can be avoided. In a variant of this embodiment, the recess 84 of the pressure section 75 of the compressed air treatment device 30 is designed substantially wedge-shaped.

9 shows the construction of a compressed air treatment system with an air dryer cartridge according to the invention and a compressed air treatment device according to the invention according to a third exemplary embodiment. The same components and components are identified by the same reference numerals as in the above embodiments. The third embodiment is different from those described above

Embodiments by the construction of the air dryer cartridge, in particular with regard to an improved space utilization for receiving the desiccant therein.

In the embodiment of FIG. 9, the cartridge housing 14, the

Mounting flange 18 and the inner housing 40 between them the receiving space for a desiccant 60 (eg silica gel). The first part 40 a of the inner housing 40 is provided on a parallel to the longitudinal axis 12 of the air dryer cartridge 10 extending wall portion with a plurality of openings 42 which are in fluid communication with the inlet opening 20 of the mounting flange 18. During normal operation of the air dryer cartridge 10 so the compressed air from the compressed air treatment device 30 through the inlet opening 20 in

Mounting flange 18 and the openings 42 of the inner housing 40 flow into the interior of the cartridge housing 14.

The wall 42 provided with the openings of the first part 40a of the inner housing 40 is surrounded by a filter device 44 in the form of a coalescence filter or oil filter. The filter device 44 is, for example, wound around the wall of the first part 40a of the inner housing 40 that runs essentially parallel to the longitudinal axis 12 of the air dryer cartridge 10. The filter device 44 is in turn surrounded by a so-called wicking material 46. In the embodiment of Fig. 9, the filter device 44 is flowed through in the radial direction of the compressed air. In addition, in the embodiment of FIG. 9, a space region 64 radially outside the filter device 44 is also filled with desiccant 60. In this way, the space within the cartridge housing 14 can be optimally utilized for receiving the desiccant 60, so that, as a result, less space is needed for the desiccant 60 and the air dryer cartridge 10 thus having a smaller diameter of, for example, only about 126 mm (in FIG Compared to a diameter of about 140 mm of conventional air dryer cartridges). A smaller diameter in turn has advantages in terms of Handling of the air dryer cartridge 10 and the necessary installation space in a compressed air treatment plant. Alternatively, for example, with a constant diameter, the height of the air dryer cartridge 10 can be reduced. Below the filter device 44, a bypass 48 is provided. In the first part 40 a of the inner housing 40 openings 50 are provided, which connect the interior of the air dryer cartridge 10 with the bypass 48. In the bypass 48, a check valve 52 is also arranged. In normal operation of the air dryer cartridge 10, the check valve 52 prevents compressed air from flowing unfiltered from the inlet opening 20 at the filter device 44 into the desiccant 60 through the bypass 48, but permits an air flow b past the filter device 44 in the regeneration mode of the air dryer cartridge 10. The check valve 52 is preferably formed of a plastic material (eg, an elastomer). It is preferably designed in one piece with the first part 40a of the inner housing 40.

The check valve 52 is spaced from the wall of the cartridge housing 14 in this construction of the air dryer cartridge 10. Thus, it is also protected against mechanical stresses that could occur, for example, by deformations of the cartridge housing 14.

A space region 65 radially outside of the check valve 52 may also be filled with desiccant 60. In this way, the space within the cartridge housing 14 can be used even more effectively for receiving the desiccant 60. Incidentally, the compressed air treatment system of this embodiment corresponds to the compressed air treatment system of the first embodiment of FIG. 1.

The present invention is not limited to the above-described embodiments of the compressed air processing system. On the contrary, those skilled in the art will recognize numerous variants and modifications that fall within the scope of the claims.

While the inner housing 40 is constructed in the described embodiments each of a first part 40 a and a second part 40 b, the inner Housing 40 may also be integrally formed in other embodiments or composed of more than two housing parts.

While in the above embodiments, the compression spring 62 is disposed between the first part 40a and the second part 40b of the inner housing 40 so as to push up the inner second part 40b in the cartridge housing 14 toward the housing cover 16, in other embodiments the compression spring 62 may also be arranged between the housing cover 16 of the cartridge housing 14 and an inner housing part, in order to bias the inner housing part in the direction of the compressed air treatment device 30.

While the check valve 52 and the sealing lips 54, 58 are each formed integrally with the inner housing 40 in the described embodiments, these components 52, 54, 58 may also be formed as separate components connected to the inner housing 40 in other embodiments ,

Although not shown, in the above embodiments, an elastic member, for example, a rubber ring may be additionally provided in the longitudinal direction 131 between the air dryer cartridge 10 and the support projection 76 of the compressed air processing apparatus. The elastic element may, for example, be prefixed on the end face of the supporting projection or on the underside of the fastening flange 18 or of the floor panel 26.

LIST OF REFERENCE NUMBERS

10 air dryer cartridge

12 longitudinal axis

131 longitudinal direction

13r radial direction

14 cartridge case

16 housing cover

18 mounting flange

20 inlet opening

22 attachment sockets

24 outlet opening

26 floor panel

27 connecting section

28 connection, esp. Flanging

29 toothing elements

30 Compressed air treatment device

32 connecting pieces

33 supporting edge

34 screw connection

36 first opening

38 second opening

40 inner casing

40a first part of the inner housing

40b second part of the inner housing

42 openings

44 Filter device

46 wicking material

48 bypass

50 openings

52 check valve

54 sealing lip

56 openings 58 sealing lip

60 desiccants

62 biasing element

64 space area radially outside of 44

65 space area radially outside of 52

66 room area within 62

68 sealing ring, esp. O-ring

69 Sealing ring, esp. Rectangular ring

70 sealing ring receptacle

72 recording section of 26

74 free end portion of 26

75 printing section

76 support projection

80 flank

82 supporting edge

84 recess for receiving 74 a air flow direction in normal operation b air flow direction in regeneration operation F contact pressure force

Claims

1 . Air dryer cartridge (10), in particular for a compressed air treatment plant of a commercial vehicle, comprising:

a cartridge housing (14) with a closed housing cover (1 6);

a desiccant (60) received in the cartridge housing (14);

a mounting flange (18) for closing a housing cover (1 6) facing away from the open end of the cartridge housing (14) and attaching the air dryer cartridge (10) to a Duckluftaufbereitungsvorrichtung (30); and a bottom plate (26) provided on the housing cover (1 6) of the cartridge housing (14) facing away from the end face of the air dryer cartridge (10) and on the housing cover (1 6) of the cartridge housing (14) facing away from the mounting flange (18). is arranged, wherein

the floor panel (26) extends away from the mounting flange (18)

the receiving portion (72) for forming a sealing ring receptacle (70) for receiving a sealing ring (68) on a longitudinal axis (12) of the air dryer cartridge side facing the receiving portion (72), the receiving portion (72) for a in the sealing ring receptacle (70) receiving the sealing ring (68) in a radial direction (13r) perpendicular to the longitudinal axis (12) of the air dryer cartridge (10) provides an external system, and

the receiving portion (72) extends at least partially below a sealing ring (68) to be received in the sealing ring receptacle (70) on a side facing away from the cartridge housing (14).

2. Air dryer cartridge according to claim 1, wherein

the receiving portion (72) of the bottom plate (26) with a free end (74) of the bottom plate (26) extends below a in the sealing ring receptacle (70) to be absorbed sealing ring (68).

3. Air dryer cartridge according to claim 2, wherein

the sealing ring receptacle (70) for receiving a sealing ring (68) between the bottom plate (26) and the mounting flange (18) is configured.

4. Air dryer cartridge according to claim 1, wherein

the receiving portion (72) of the floor panel (26) is formed by a portion of the floor panel bent back on itself.

5. Air dryer cartridge according to claim 4, wherein

the sealing ring receptacle (70) for receiving a sealing ring (68) between the bottom plate (26) and a compressed air treatment device (30) is configured.

6. Air dryer cartridge according to claim 4 or 5, wherein

a free end (74) of the floor panel (26) at least partially surrounds a portion of the mounting flange (18).

7. Air dryer cartridge according to one of the preceding claims, in which

the base plate (26) has at least one toothed element (29) which can be brought into engagement with the side of the fastening flange (18) facing away from the housing cover (16) of the cartridge housing (14).

8. Air dryer cartridge according to one of the preceding claims, wherein

the receiving portion (72) of the bottom plate (26) is at least partially curved.

9. Air dryer cartridge according to one of the preceding claims, in which

the mounting flange (18) on its the housing cover (1 6) of the cartridge housing (14) facing away from the outside at least in the region of the sealing ring receptacle (70) is designed plan.

10. Air dryer cartridge according to one of the preceding claims, wherein

the floor panel (26) has a connecting section (27) for connection to the cartridge housing (14), wherein the connecting section (27) extends in a longitudinal direction (131) parallel to the longitudinal axis (12) of the air dryer cartridge (10) from the mounting flange (18 ) extends away.

1 1. Compressed air preparation device (30), in particular for a compressed air treatment plant of a commercial vehicle, comprising:

a spigot (32) for securing an air dryer cartridge (10) to the air conditioning apparatus (30), wherein a longitudinal axis of the spud (32) is substantially coaxial with a longitudinal axis (12) of the air dryer cartridge (10) when the air dryer cartridge is mounted on the air dryer cartridge Compressed air conditioning device is attached,

characterized in that

the compressed air treatment device (30) further has a pressure section (75) which is provided in the radial direction perpendicular to the longitudinal axis (12) of the air dryer cartridge (10) outside the connecting piece (32),

said pressure portion (75) having a support projection (76) extending toward the air dryer cartridge extending in the radial direction (13r) perpendicular to the longitudinal axis (12) of the air dryer cartridge (10) within one between the compressed air processing device (30) and the air dryer cartridge

(10) male sealing ring (68) is positioned and for a male sealing ring (68) in the radial direction (13r) provides an internal system.

12. compressed air treatment device according to claim 1 1, wherein

the support projection (76) of the pressure section (75) is dimensioned such that in the assembled state of the air dryer cartridge in a longitudinal direction (131) parallel to the longitudinal axis (12) of the air dryer cartridge from the air dryer cartridge (10) is spaced.

13. Compressed air treatment device according to claim 1 1 or 12, wherein

the pressure section (75) has a support edge (82) that extends outward from the support projection (76) in the radial direction (13r), so that this support edge (82) rests on one of the air dryer cartridge (10) in the installed state of the air dryer cartridge. opposite side extends at least partially below a male sealing ring (68).

14. A compressed air treatment device according to claim 13, wherein

the pressure portion (75) in the radial direction (13r) outside the support projection (76) has a recess (84) which is set back relative to the support edge (82).

15. A compressed air treatment device according to claim 14, wherein

the depression (84) of the pressure section (75) is trapezoidal or wedge-shaped.

16. Compressed air treatment system, in particular for a compressed air treatment plant of a commercial vehicle, comprising:

a compressed air treatment device (30) according to any one of claims 1 1 to 15; an air dryer cartridge (10) according to any one of claims 1 to 10; and

a sealing ring (68) for sealing between the air dryer cartridge (10) and the compressed air treatment device (30).

17. Compressed air treatment system according to claim 1 6, wherein

the sealing ring (68) is designed as an O-ring with a circular cross-section.