WO2016030505A1

WO2016030505A1 - Valve assembly

Info

Publication number: WO2016030505A1
Application number: PCT/EP2015/069741
Authority: WO
Inventors: Holger Fries; Ralf LÜDERS
Original assignee: Volkswagen Aktiengesellschaft
Priority date: 2014-08-29
Filing date: 2015-08-28
Publication date: 2016-03-03
Also published as: DE102015216498A1

Abstract

The invention relates to a valve assembly (10) comprising a fluid supply channel (12) that extends in an axial direction (L), a valve member (20) that is movable relative to the fluid supply channel, and a sealing arrangement (30) for sealing a transition between one end of the fluid supply channel (12) and the valve member (20). The sealing arrangement (30) has two sealing sleeve parts (32, 34), at least some sections of which overlap each other and which are arranged so as to be movable relative to one another in the axial direction (L), which sealing sleeve parts have a sealing gap (35) between them that runs in the axial direction (L).

Description

description

valve assembly

The invention relates to a valve arrangement having a fluid supply channel extending in an axial direction, a valve member movably arranged relative thereto, and a sealing arrangement for sealing a transition between the valve body

Fluid supply channel and the valve member, according to the preamble of claim 1. In particular, the valve assembly is a control valve for controlling a

Coolant circuit, such as the coolant circuit of an internal combustion engine.

Preferably, the valve assembly is part of a rotationally controlled water pump. Furthermore, the invention relates to the sealing arrangement of such a valve arrangement.

Conventional internal combustion engines regularly have one or more

Coolant circuits for cooling, wherein the coolant, for example, can be passed through a first coolant path with a heat exchanger or through a second coolant path without heat exchanger. To control the quantities of coolant to be conducted through the various coolant paths, valve arrangements such as rotary valves are regularly provided. Valve assemblies include an adjustable valve member such as a rotary valve which, in a first valve position, opens a passage between the fluid supply channel and a first fluid discharge channel and, in a second valve position, releases a passage between the fluid supply channel and a second fluid discharge channel. Also intermediate positions of the valve member are possible, for example. To be able to set an optimal coolant temperature. In the respective valve positions must be ensured that the valve member facing the end of the fluid supply channel sealingly abuts the valve member, so that a penetration of the coolant to not intended areas of the valve assembly such as electrical components and their damage is prevented. Furthermore, in a closed valve position, no coolant should be able to advance further from the fluid supply channel past the valve member into the valve arrangement and vice versa. For this purpose, a sealing arrangement acting between the movable valve member and the end of the fluid supply path is regularly provided.

Such a conventional valve arrangement 110 is shown by way of example in FIG. 5. Through a sealing arrangement 130 are leakage paths between the Fluid supply channel 1 12 and the transversely movable valve member 120 sealed. The sealing arrangement 130 has a sealing bush 155, the front end of which bears sealingly against the valve member 120. The sealing bushing 155 is pressed axially against the valve member under the action of a spring 140, so that a first leakage path ("bypass flow 1") designated by reference numeral 1 is sealed between valve member 120 and sealing bushing 155. Furthermore, the sealing arrangement 130 has a radially compressed one Sealing ring 145, which rests radially on the outside of the sealing bushing 155. The sealing ring 145 acts between an inner wall of the Fluidzuführkanals 1 12 and an outer wall of the sealing bushing 155, so that designated by a reference numeral 2 second leakage path ("bypass current 2") between the valve member 120 and sealing bushing 155 is sealed. The seal assembly thus constitutes a "bridge" between the Fluidzuführkanal and the valve member.

Similar valve arrangements are described in the publications DE 10 2009 025 360 A1, DE 10 2009 014 047 A1, DE 10 2009 025 351 A1 and DE 10 2009 014 047 A1. In these valve arrangements in each case the first leakage path 1 by an axial pressing of a sealing bushing to the valve member and the second leakage path 2 by an externally attached to the sealing bush or starting from the

Sealing bush radially outwardly projecting second sealing element sealed. In the document US Pat. No. 5,211,686, the second leakage path is sealed by a plurality of radially acting sealing elements. According to the document US 3,1 14,386, the first and the second leakage path is sealed by a radially and axially acting sealing element.

However, it has been found that these conventional sealing arrangements are not regularly applied optimally to the valve member, which can lead to an increased bypass current 1. For this reason, attempts have been made to work with stronger springs 140. However, this leads to a stronger component load and an increased drive torque for adjusting the valve member.

In view of the described problems, the invention has for its object to provide an easily assembled valve assembly which optimally seals the transition between the Fluidzuführkanal and the valve member at any time without stressing the components involved heavily. In particular, concentricity errors in the movement of the valve member relative to the Fluidzuführkanal be compensated. This object is achieved by a valve arrangement of the type mentioned above with the features characterized in claim 1. Advantageous embodiments of the invention are described in the dependent claims. A sealing arrangement for a valve arrangement according to the invention is described in claim 12.

The sealing arrangement of the valve arrangement according to the invention has two sealing sleeve parts which overlap one another at least in sections and are movable relative to one another in the axial direction, which have a sealing gap running in the axial direction between them. The sealing gap is preferably between a

Inner wall of a sealing sleeve part and an outer wall of the other

Sealing sleeve part formed where the two sealing sleeve parts overlap. In this case, the preferably cylindrical, in particular circular cylindrical, inner wall of a sealing sleeve part sealingly fit tightly against the preferably cylindrical, in particular circular cylindrical outer wall of the other sealing sleeve part, without radially acting sealing elements such as O-rings in the sealing gap are required to seal the sealing gap. Preferably, the outer diameter of the one sealing sleeve part corresponds to the inner diameter of the other overlapping therewith

Dichthülsenteils, so that the sealing sleeve parts overlap each other in the sealing gap clearance or with minimal clearance. In this case, O-rings and other radially acting sealing elements in the sealing gap or the sealing arrangement circumferential sealing elements can be omitted.

In other words, the at least partially tubular first sealing sleeve part is at least partially inserted into the at least partially rohrformige second sealing sleeve part and against this displaceable, so that the contact region of the two sealing sleeve parts forms the extending in the axial direction, annular sealing gap. A sealing gap can be understood to mean a gap-shaped sealing region in which a preferably cylindrical surface of the first

Sealing sleeve part seals against a preferably cylindrical surface of the second sealing sleeve part. Preferably, at least one sealing sleeve part, preferably both sealing sleeve parts, are again movable in the axial direction relative to the inner wall of the fluid supply channel.

The invention is based on the knowledge that in conventional

Valve assemblies insufficient conditioning of the seal assembly on the valve member is due to the fact that the radially biased sealing ring, the axial Impact of the sealing bushing is impaired, however, which is required to compensate for shape and position deviations in the system. This can lead to a leakage between the sealing bush and the valve member. By contrast, according to the invention, a radially acting seal between the inner wall of the fluid supply channel and the

Sealing sleeve part are omitted, since the task of (radial) sealing of the second leakage path 2 is fulfilled by the sealing gap or gap seal between the two sealing sleeve parts. A radial seal towards the inner wall of the

Fluidzuführkanals that could affect the axial mobility of the sealing sleeve parts, so omitted according to the invention. Preferably, the sealing gap in the form of a "trumpet-like" gap seal is formed and depending on the mutual axial position of the two sealing sleeve parts can be extended and shortened.

Due to the increased by the elimination of the sealing ring axial mobility of the sealing sleeve parts can also be the acting system pressure, the contact pressure of the

Sealing sleeve part support the valve member, resulting in a further reduction of the bypass current 1.

Preferably, the sealing gap is formed by the sealing abutment of a cylindrical

Inner surface of the one sealing sleeve part formed on a cylindrical outer surface of the other sealing sleeve part.

With regard to an optimum sealing effect, it has been found to be advantageous that the first sealing sleeve part is designed for sealing contact with the valve member and / or the second sealing sleeve part is designed for sealing engagement with an approximately radially extending shoulder in the fluid supply channel. In this case, both axial ends of the seal assembly can be sealingly applied to a contact surface of the valve member and the Fluidzuführkanals. A fluid supply channel is understood to mean a housing part through which coolant can flow, via which the coolant can be conducted to the valve member or away from the valve member.

The sealing effect can be further improved by the two sealing sleeve parts are forced apart by the action of a biasing member in the axial direction or pushed away from one another. Due to the omission of the radially acting seal between the fluid supply channel and the sealing sleeve part, a spring element with a comparatively small spring force is sufficient to provide a satisfactory contact pressure of the sealing sleeve parts to the respective contact surface of valve member or Fluidzuführkanal.

In a particularly preferred embodiment of the invention, the first sealing sleeve part is urged by the action of the biasing member for axial sealing against a bearing surface of the valve member and / or the second sealing sleeve part is urged by the action of the biasing member for axial sealing against the approximately radially extending shoulder of the Fluidzuführkanals. The two sealing sleeve parts are loaded only comparatively slightly by the weakly dimensioned biasing element, and the valve member can be adjusted due to the low pressure force of the biasing member with a smaller rotary valve engine than usual. In other words, the two sealing sleeve parts are stretched over the biasing element between the Fluidzuführkanal and the valve member.

The biasing member preferably includes a spring member such as a steel spring, annular spring, coil spring, corrugated spring, elastic bellows member

Clamping element made of an elastic material or the like. on. In a particularly preferred embodiment, the biasing element is in the form of a corrugated ring spring, in particular made of stainless steel.

To increase the effectiveness and the protected arrangement of the biasing element, it has proven to be useful to include this in a formed between an outer wall of the second sealing sleeve part and an inner wall of the Fluidzuführkanals, cylindrical annular space. In this case, the biasing element may rest against a radial contact surface of the second sealing sleeve part facing the valve member and against a radial contact surface of the first sealing sleeve part facing away from the valve member and urge these two contact surfaces away from one another.

The second sealing sleeve part is preferably designed as a collar sleeve and has a radially outwardly projecting collar portion for engaging the shoulder of the

Fluidzuführkanals and in the direction of the valve member projecting pipe section for sealing engagement with a pipe section of the first sealing sleeve part. The collar sleeve may be formed of metal or plastic. Preferably, at least the sealing surfaces of the collar sleeve are formed of metal. In particular, the collar sleeve is made entirely of metal. In a particularly preferred embodiment, the collar sleeve made of steel, in particular stainless steel.

The metal collar portion of the collar sleeve can be urged in this case under the action of the biasing member sealingly against the shoulder of Fluidzuführkanals, and the metal tube section of the collar sleeve can also bear sealingly to form the axially extending sealing gap on a preferably also metal pipe section of the first sealing sleeve part.

Preferably, the sealing gap is formed between a cylindrical inner surface of a pipe section of the first sealing sleeve part and a sealingly abutting cylindrical outer surface of the pipe section of the collar sleeve.

In a particularly preferred embodiment of the invention, the first sealing sleeve part has a metallic pipe section for sealing engagement with the metallic pipe section of the second sealing sleeve part. Metallic sleeves can be manufactured more accurately than plastic sleeves, which leads to a precisely dimensioned sealing gap and thus to a lower leakage through the sealing gap. Furthermore, the two sealing sleeve parts then have the same thermal expansion coefficient, which leads to a constant sealing gap width over all temperatures.

The metallic tube section of the second sealing sleeve part can be inserted into the metallic tube section of the first sealing sleeve part in such a way that penetration of fluid through the sealing gap is prevented by the contact of metallic sealing surfaces alone. Elastomer parts such as O-rings within the sealing gap can be omitted. In this way, the axial mobility of the two sealing sleeve parts can be improved relative to each other.

Alternatively, the sealing gap can be realized by two interlocking sealing sleeve parts made of plastic.

A particularly reliable sealing of the two leakage paths can be achieved in that the first sealing sleeve part a valve sleeve facing the sealing sleeve of a sealing material such as a plastic and with the sealing bush preferably positive, non-positively and / or materially connected and the Having second sealing sleeve part facing pipe section of metal. Of the

Pipe section of the second sealing sleeve part can be inserted into the pipe section of the first sealing sleeve part and sealing, but axially movable to rest against the inner surface.

Preferably, the first sealing sleeve part comprises a starting from the

Pipe section of the first sealing sleeve part radially outwardly projecting collar, which is urged by the action of the biasing member against the sealing bushing. In this way, the pipe section of the first sealing sleeve part is sealingly connected to the sealing bushing of the first sealing sleeve part. The biasing member may act in this case between the annular outwardly projecting collar of the first sealing sleeve part and the annular outwardly projecting collar portion of the second sealing sleeve part and the sealing sleeve parts thereby axially

apart pushing.

The collar and the pipe section of the first sealing sleeve part are preferably integrally formed of metal such as stainless steel, and / or the sealing bush of the first sealing sleeve part is preferably formed integrally from a sealing material such as elastomer, plastic or rubber. In a particularly preferred

Embodiment, the sealing bush is formed as a molded part of PVDF.

The valve sleeve facing the sealing sleeve of the first sealing sleeve part is

preferably provided for sealing engagement with the valve member. Preferably, the valve member facing the end of the sealing bush is adapted to a shape and / or dimension of a contact surface of the valve member. A sealing bush made of a sealing material offers the advantage that the sealing effect between the

Sealing arrangement and the valve member is ensured by the seal member sealingly engageable on the sealing material of the sealing bushing. In this way, a slight friction between the seal assembly and the valve member in a movement of the valve member can be ensured. Furthermore, the material of the sealing bushing offers a high degree of geometrical reliability and is robust against coolant, temperatures and dirt.

On the other hand, the axial sealing gap can be sealed only by metallic sealing surfaces without the axial mobility restricting, radially acting sealing elements are required. In an alternative embodiment, the pipe section of the second

Alternatively or additionally, the first sealing sleeve part has a sealing bush made of a sealing material, such as a plastic whose inner diameter is at least partially adapted to the outer diameter of the second sealing sleeve part or vice versa, so that the second sealing sleeve part is at least partially receivable in the first sealing sleeve part forming the sealing gap or the other way around. If the sealing gap is formed by two adjoining plastic surfaces, at least one of the surfaces can be structured and, for example, circumferential shafts, sealing lips or the like. exhibit.

With regard to a simplification of assembly and transport of the seal assembly, it has been found to be advantageous that the two sealing sleeve parts are fastened to each other, in particular be clipped together. In other words, the overlap of the two sealing sleeve parts can optionally be combined with a clip closure, so that the sealing arrangement can be transported and mounted as a unit.

The valve assembly according to the invention preferably comprises a control valve and in particular has a valve member in the form of a transverse to the axial direction of the

Fluid supply channels adjustable rotary valve on.

According to a further aspect, the invention relates to a sealing arrangement of a valve arrangement according to the invention. The sealing arrangement has two sealing sleeve parts overlapping one another at least in sections and movable relative to one another, which have an annular sealing gap between them. The two sealing sleeve parts are forced apart by a biasing element acting between two radial contact surfaces of the two sealing sleeve parts.

Preferably, the first sealing sleeve part as a sealing bushing and the second

Sealing sleeve part realized as collar sleeve. If the two sealing sleeve parts, for example, be interconnected by a clip connection, the inventive

Sealing arrangement are joined as a fixed unit and transported and assembled as a unit. The seal assembly may have the further features described above individually or in any combination. Preferably, the second sealing sleeve part has a sealing bush made of a

Seal material and an associated pipe section made of metal, wherein the sealing gap between a cylindrical surface of the pipe section and a cylindrical surface of the collar sleeve is realized. The pipe section can be urged against the sealing bushing under the action of the biasing element.

The invention will be explained in more detail below with reference to the drawing. This shows in

Fig. 1 shows an embodiment of a valve arrangement according to the invention in one

Sectional view

Fig. 2 shows an embodiment of a sealing arrangement according to the invention in one

Sectional view

3a shows a further embodiment of a sealing arrangement according to the invention in a sectional view,

3b shows a further embodiment of a sealing arrangement according to the invention in a sectional view,

Fig. 4a shows a further, particularly preferred embodiment of a

valve assembly according to the invention,

4b, the valve arrangement shown in Figure 4a in a sectional view,

4c shows a section through the seal arrangement of the one shown in Fig. 4a

Valve arrangement according to the invention in a perspective view,

Fig. 4d, the seal assembly of the valve assembly shown in Fig. 4a in a

Exploded view, and

Fig. 5 shows a conventional valve arrangement in a sectional view.

In the figures 1 and 2, a part (the left part) of an inventive

Valve assembly 10 and a seal assembly 30 according to the invention shown in a sectional view. The valve assembly 10 is a control valve with a Rotary valve member 20 which is transverse to a flow direction of a coolant in a direction leading to the valve member 20 Fluidzuführkanal 12 adjustable. In a first valve position of the valve member 20 is a fluid flow path between the Fluidzuführkanal 12 and a first discharge channel (not shown) and in a second valve position of the valve member, a Fluidstromungsweg between the Fluidzuführkanal 12 and a second discharge channel (not shown) is released. However, the invention can also be used with other valve types.

What is important is an optimal seal between an end portion of the

Fluidzuführkanals 12 and the valve member 20. For this purpose, a provided for sealing engagement with a contact surface 22 of the valve member 20 seal assembly 30 is provided in a transition region between the valve member 20 and the Fluidzuführweg 12. In this case, on the one hand, a first leakage path 1 in the form of an axial gap between the contact surface 22 and the seal assembly 30 must be sealed. For others, a second leakage path 2 in the form of a radial gap extending between the seal assembly 30 and an inner wall of the fluid supply passage 12 must be sealed.

To seal the first leakage path 1, the valve member 20 facing the end of a first sealing sleeve member 32 in the form of a sealing bushing 55 is pressed under the action of a biasing member 40 in the form of a corrugated ring spring against the contact surface 22 of the valve member 20. This end of the first sealing sleeve part 32 is connected to the

Outer contour of the contact surface 22 adapted and extends in the illustrated

Embodiment substantially funnel-shaped. With regard to an optimal

Sealing consists of the sealing bushing 55 of the first sealing sleeve part 32 of a sealing material such as a plastic.

The sealing arrangement 30 further has a second sealing sleeve part 34, which overlaps in the axial direction L at least in sections with the first sealing sleeve part 32 and is movably arranged opposite the first sealing sleeve part 32. In the embodiment shown in FIG. 1, the inner surface of a tube section 54 of the second sealing sleeve part 34 bears sealingly against an outer surface of a tube section 39 of the first sealing sleeve part 32.

In the embodiment shown in FIG. 2, on the other hand, the pipe section 54 of the second sealing sleeve part 34 is in the pipe section 39 of the first sealing sleeve part 32 pushed so that a substantially cylindrical inner surface of the first sealing sleeve member 32 sealingly abuts a substantially cylindrical outer surface of the second sealing sleeve part 34.

Thus, a circumferential and in the axial direction L extending sealing gap 35 is formed between the first sealing sleeve part 32 and the second sealing sleeve part 34. Due to the axial relative mobility of the first sealing sleeve part 32 and the second sealing sleeve part 34, this sealing gap can also be called a trombone gap. Through the trombone gap of the second leakage path 2 is sealed.

As particularly clearly shown in Figures 1 and 2, the biasing member 40 is received in a gap 15 which is formed between the second sealing sleeve part 34 and the inner wall of the Fluidzuführkanals 12. The biasing member 40 urges the two sealing sleeve parts 32, 34 apart in the axial direction L and is for this purpose at radial contact surfaces of the two sealing sleeve parts 32, 34 at. The second sealing sleeve part 34 is urged by the biasing member 40 against a radially extending shoulder 14 which is formed by the wall of the Fluidzuführkanals 12 and by a housing wall. Thus, the two sealing sleeve parts 32, 34 are clamped via the biasing element 40 between the valve member 20 and the housing or the fluid supply channel 12.

The second sealing sleeve part 34 is formed in the embodiments shown in Figures 1, 2, 3a and 3b respectively as a collar sleeve with a voltage applied to the shoulder 14 collar portion 37, which is remote from the valve member 20 end of the second sealing sleeve part 34, starting from the cylinder jacket-shaped pipe section 54 projects radially outward.

In the embodiment of a device according to the invention shown in Fig. 2

Sealing arrangement 30, both the second sealing sleeve part 34 and the first sealing sleeve part 32 is formed from a plastic.

In the embodiment of a shown in Figures 3a and 3b

Sealing arrangement 30 'according to the invention is the second sealing sleeve part 34 designed as a collar sleeve and a tube section 52 of the first fitting

Sealing sleeve part 32 formed of metal. The tube section 52 of the first sealing sleeve part 32 is a positive fit (FIG. 3 a) and / or a force fit (FIG. 3 b) with a plastic formed sealing sleeve 55 which bears sealingly against the valve member 20. The pipe section 54 of the second sealing sleeve part 34 protrudes into an intermediate space between the collar sleeve 55 and the pipe section 52 of the first sealing sleeve part 32.

In the following, the particularly preferred embodiment of a valve arrangement according to the invention shown in FIGS. 4a to 4d is explained. As far as this embodiment corresponds to the above-described embodiments, is

Avoiding repetition referred to the above description.

As shown in Fig. 4a, the valve assembly comprises a valve member 20 of a

Control valve, which is arranged relative to a Fluidzuführkanal 20 rotatable. A flap of the control valve blocks in a first valve position

Fluidstromungsweg between the Fluidzuführkanal 12 and a discharge channel, and are in a second valve position the Fluidstromungsweg 12 between the

Fluid supply channel and the discharge channel free.

What is important is an optimal seal between an end portion of the

Fluid supply channel 12 and the valve member 20 (rotary valve) in the first valve position even in the case of possible concentricity errors of the valve member 20. For this purpose, for sealing engagement with a bearing surface 22 of the valve member 20 is established sealing assembly 30 "in a transition region between the valve member 20 and provided the Fluidzuführweg 12.

As shown in Figures 4c and 4d, the seal assembly 30 "comprises a first sealing sleeve portion 32 comprising a sealing bushing 250 of a sealing material such as an elastically deformable elastomeric material and a metal tubular portion 251. Further, the sealing assembly 30" includes second sealing sleeve part 34, which is formed as a collar sleeve made of metal and also has a pipe section 54 which projects into the pipe section 251 of the first sealing sleeve part.

The first sealing sleeve part 32 and the second sealing sleeve part 34 are movable relative to one another in the axial direction, and between the tube section 251 of the first

Dichtmülsenteils and the tube portion 54 of the second sealing sleeve part is formed by a penetration of fluid preventing and extending in the axial direction sealing gap. The second sealing sleeve part 34 formed as a collar sleeve made of metal (eg stainless steel) comprises a flange portion 37 projecting radially outward from the tube portion 54, which is urged against a shoulder 14 of the fluid supply channel 12 by the action of a biasing element 40.

Furthermore, a collar projects annularly radially outward from the pipe section 251 of the first sealing sleeve part 32, which collar is urged against the sealing bush 250 in the axial direction by the action of the pretensioning element 40. In this way, the pipe section 251 and the sealing bush 250 are sealingly connected to form the first sealing sleeve part 32. Alternatively or additionally, the pipe section 251 and the sealing bushing 250 may also be connected to one another in a form-fitting and / or material-locking manner.

Thus, the biasing member 40 acts between the annular outward

protruding collar portion 37 of the second sealing sleeve part and the annular outwardly projecting collar 252 of the first sealing sleeve part and urges the two sealing sleeve parts in this way apart in the axial direction. The collar portion 37 of the second sealing sleeve part is sealingly urged against the shoulder 14, and the

Sealing sleeve 250 of the first sealing sleeve part 250 is sealingly urged against the valve member 20.

The biasing member 40 is preferably formed as a corrugated spring ring made of stainless steel, and the sealing bushing 250 is preferably formed as a molded molded part made of PVDF.

In contrast, preferably, the two are the sealing gap between them forming and mutually overlapping in the axial direction pipe sections 54 and 251 made of metal, in particular made of stainless steel. Due to the same coefficient of expansion of the two existing from the same metal pipe sections 54, 251 thus seals the constant sealing gap reliably even under thermal fluctuations

Maintaining the axial relative mobility from.

The tightness of the sealing gap can be further improved if the pipe section 54 of the second sealing sleeve part protrudes in the axial direction over more than 5 mm, in particular over more than 1 cm in the pipe section 251 of the second sealing sleeve part.

As particularly clearly shown in Fig. 4b, the sealing bush 250 is not only by the action of the force of the biasing member 40, but also by the System pressure in the fluid supply channel 12 against the contact surface 22 of the valve member 20 is urged.

The seal assembly has no acting in the radial direction sealing ring, O-ring or the like. on, which could limit the axial mobility of the sealing sleeve parts.

The two sealing sleeve parts can be connected to one another via a clip mechanism and can then be transported and mounted as a unit.

List of Reference Leakage path 1

Leakage path 2

valve assembly

fluid supply

paragraph

gap

valve member

Contact surface of the valve member

, 30 ', 30 "seal assembly

first sealing sleeve part

second sealing sleeve part

sealing gap

collar portion

Pipe section of the first sealing sleeve part biasing element

Pipe section of the first sealing sleeve part Pipe section of the second sealing sleeve part Sealing bushing

0 valve arrangement

2 fluid supply channel

0 valve member

0 sealing arrangement

0 spring

5 sealing ring

5 sealing bush

0 sealing bush

1 pipe section of the second sealing sleeve part 2 collar of the second sealing sleeve part

axial direction

Claims

claims

First valve assembly (10), in particular control valve for controlling a

Coolant circuit of an internal combustion engine, with a in an axial direction (L) extending Fluidzuführkanal (12), a relatively movable

arranged valve member (20) and a sealing arrangement (30) for sealing a transition between one end of the Fluidzuführkanals (12) and the valve member (20), characterized in that the seal assembly (30) at least two overlapping at least partially and in the axial direction (L) relative to each other movably arranged sealing sleeve parts (32, 34), between which in the axial direction (L) extending sealing gap (35) is formed.

2. Valve arrangement according to claim 1, characterized in that the sealing gap by the sealing engagement of a cylindrical inner surface of the one

Sealing sleeve part is formed on a cylindrical outer surface of the other sealing sleeve part.

3. Valve arrangement according to claim 1 or 2, characterized in that the first sealing sleeve part (32) for sealing engagement with the valve member (20) is arranged and / or the second sealing sleeve part (34) for sealing engagement with an approximately radially extending shoulder (14 ) of the fluid supply channel (12) is set up.

4. Valve arrangement according to one of the preceding claims, characterized

characterized in that the two sealing sleeve parts (32, 34) are forced apart in the axial direction (L) by the action of a biasing element (40), such as a corrugated ring spring.

5. Valve arrangement according to claims 3 and 4, characterized in that the first sealing sleeve part (32) by the action of the biasing member (40) for axial sealing against a contact surface (22) of the valve member (20) is urged and / or the second sealing sleeve part (34) by the action of the biasing member (40) for axial sealing against the shoulder (14) of the Fluidzuführkanals (12) is urged.

6. Valve arrangement according to claims 4 or 5, characterized in that the biasing element (40) preferably in the form of a spring such as a steel spring or corrugated spring or in the form of a clamping element made of an elastic material in between an outer wall of the second

Sealing sleeve part (34) and an inner wall of the Fluidzuführkanals (12) formed intermediate space (15) is received.

7. Valve arrangement according to claim 3 or one dependent claim, characterized in that the second sealing sleeve part (34) preferably formed as a metal collar sleeve with a radially outwardly projecting

Bund portion (37) for engagement with the shoulder (14) of the Fluidzuführkanals and formed with a in the direction of the valve member (20) projecting pipe section (54) for sealing engagement with a preferably formed of metal pipe section (39) of the first sealing sleeve part (32) is.

8. Valve arrangement according to one of the preceding claims, characterized

characterized in that the first sealing sleeve part (32) has a preferably metallic pipe section (52) for sealing engagement with a preferably metallic pipe section (54) of the second sealing sleeve part (34), preferably such that a penetration of fluid through the sealing gap by the installation alone metallic surfaces is prevented from each other.

9. Valve arrangement according to one of the preceding claims, characterized

in that the first sealing sleeve part (32) comprises a sealing bush (55, 250) facing the valve member, made of a sealing material such as a plastic and a pipe section (52, 251) connected to the sealing bushing (55, 250) and facing the second sealing sleeve part (34) ) made of metal.

10. Valve arrangement according to claims 4 and 9, characterized by a starting from the pipe section (251) radially outwardly projecting collar (252) which is urged by the action of the biasing member (40) against the sealing bush (250).

1 1. Valve arrangement according to one of the preceding claims, characterized

in that the first sealing sleeve part (32) has a sealing bush (55, 250) made of a sealing material, such as a plastic, whose Inner diameter is at least partially adapted to the outer diameter of the second sealing sleeve part (34) or vice versa, so that the second sealing sleeve part (34) to form the sealing gap (35) at least partially in the first sealing sleeve part (32) is receivable or vice versa.

12. Valve arrangement according to one of the preceding claims, characterized

in that the two sealing sleeve parts (32, 34) can be fastened to one another, in particular can be clipped together.

13. Valve arrangement according to one of the preceding claims, characterized

characterized in that the valve member (20) has a transverse to the axial direction (L) adjustable rotary valve.

14. Sealing arrangement (30) of a valve arrangement (10) according to one of

previous claims.