DE102016118133A1 - Rotary valve - Google Patents

Abstract

Rotary slide valve (1) of a motor vehicle cooling circuit, comprising a valve housing (10) having a cylindrical valve interior (16) bounded by a valve inner wall (14) with at least one valve inlet (11), at least one valve outlet (12.1, 12.2) and a radial passage (13.1, 13.2) between the valve inlet (11) and the valve outlet (12.1, 12.2), and a in the valve housing (10) movably mounted control body (20) for controlling the passage (13.1., 13.2). The control body (20) has a shaft (21) extending coaxially through the valve interior (16), at the end of which the radial passage (13.1., 13.2) is closed by a support structure (22.1) projecting radially outward from the shaft (21). 22.2) with a on the support structure (22.1, 22.2) mounted closure element (23.1, 23.2) is arranged, wherein the closure element (23.1, 23.2) slidably against the valve inner wall (14) and against the shaft (21) in the radial direction is spring-loaded slidably mounted.

Description

The invention relates to a rotary slide valve of a motor vehicle cooling circuit, comprising a valve housing having a cylindrical valve interior bounded by a valve inner wall with at least one valve inlet, at least one valve outlet and a radial passage between the valve inlet and the valve outlet, and a control body movably mounted in the valve housing for regulating the passage.

Such cylindrical rotary slide valves are well known and serve to regulate a flowing medium, in particular a coolant flow in a motor vehicle. Such rotary valves usually have a valve longitudinal axis to which and / or along which the control body is mounted for continuous control within the valve housing movable. The rotary valve valve usually has two valve ports, in particular a valve inlet and a valve outlet. In modern motor vehicle cooling circuits, however, more than just two valve connections, in particular more than just one valve outlet, may be required on a rotary slide valve, for example in order to be able to control a plurality of individual cooling circuits or cooling circuits individually and as required. As a result, different cooling circuits of the motor vehicle, for example, such as an electric motor cooling circuit, a vehicle battery cooling circuit or an air conditioning cooling circuit, can be acted upon to different degrees with a coolant flow and, accordingly, heated at different temperatures.

At least one of the valve connections - for example the valve outlet - is arranged radially on the cylindrical valve interior or the valve housing and has a radially arranged on the valve housing passage to the other valve port, in particular to the valve interior. This other valve connection - for example, the valve inlet - can be arranged arbitrarily on the valve housing, in particular axially or alternatively also radially. The radial passage in the sense of the present invention is to be understood as any connecting duct which opens radially into the interior of the valve. Of course, more than just a radial valve inlet or valve outlet can be provided. Furthermore, it is possible that all connections of the rotary slide valve are arranged radially on the valve housing and correspondingly have a respective radial passage.

The control body is usually a block made of solid material, which extends over the entire length and the entire cross-section of the valve interior, wherein for controlling the cooling medium in the control body individual axial and / or radial channels are formed, which enable to release a flow with a respective Valve port channel are offset in accordance. To avoid a leakage flow, a sliding seal is usually provided between the control body and the valve housing. Such rotary valves, however, have a relatively high weight due to the design of the control body. Furthermore, control bodies are known, which are composed of several individual members or components, without filling the entire valve interior. Such control bodies usually comprise a separately formed valve disk for releasing or blocking a valve connection channel with respect to the valve interior and / or the other valve connection.

With regard to the configuration of the control body of the rotary valve valve therefore numerous variants are known, for the selection and design of the control body usually the number of connections, the service life, the space requirement and / or the functionality of the valve are considered essential aspects. However, for technical reasons, the above-mentioned aspects can usually not be considered as equivalent in the realization.

From the EP 2 314 900 A2 For example, a rotary valve with a control body is known in which a valve disc can be rotated without contact with respect to an inner wall of the valve body, and only when reaching a presidency position by means of a control mimic can be pushed substantially straight radially outward on a valve seat. As a result, although a friction of the valve disk and a seal disposed thereon can be avoided on the housing inner wall during rotation of the control body and thus an increase in the life be possible, however, the control body is relatively complex and thus relatively expensive and expensive in terms of production and installation. In addition, such an actuating mechanism is only suitable for valves with a single radial valve connection to be closed, and is thus unsuitable for interconnecting a plurality of valve outlets.

The invention is therefore an object of the invention to provide a rotary valve, which allows both reliable and low-wear operation as well as a compact and inexpensive to manufacture and assembly construction. Furthermore, a connection of several valve connections should be made possible.

The object is achieved by a rotary valve with the features of claim 1. Advantageous embodiments and modifications of the invention are in the Subclaims, the description and the figures listed.

According to the invention, the object is achieved by a generic rotary slide valve characterized in that the control body has a coaxially extending through the valve interior shaft on which is arranged for closing the radial passage of the shaft radially outwardly projecting support structure with a bearing element mounted on the support structure, wherein the closure element slidably bears against the valve inner wall and is mounted so as to be displaceable in a spring-loaded manner relative to the shaft in the radial direction.

The shaft is to be understood as a basic body which extends axially through the valve housing, without filling the entire cross-section of the valve interior, preferably from one axial end of the valve housing to the other axial end. Depending on the number of radial valve connections or passages, a single support structure with closure element or a corresponding number of support structures, each with a closure element for closing the passage or the passages, may be arranged on the shaft. To simplify the assembly, the support structure and the closure element may be formed separately and be fastened or supported relative to one another in a relatively simple manner, for example by a simple nesting of the components.

The support structure is basically rotatably connected to the shaft, so that the support structure follows a rotation of the shaft. As a result, the radial passage can preferably be released or closed by a pure rotational movement of the shaft or the support structure arranged thereon with the closure element arranged thereon. For this purpose, the closure element with the valve inner wall in a slidable contact and slides when moving the control body along the inner wall. To close the passage, the closure element is rotated in front of the passage and seals off the passage or valve connection channel with respect to the valve interior. For this purpose, a sealing element for sealing a gap between the closure element and the valve inner wall may be provided on the closure element, in particular on one of the valve inner wall facing side surface of the closure element. The closure element may be movably mounted on the support structure, in particular displaceable in a spring-loaded manner in the radial direction to the shaft. As a result, a particularly tight closing of the valve connection by the closure element can be effected. Additionally or alternatively, the support structure can be mounted radially displaceable as such relative to the shaft. In this case, the closure element may be integrally formed or integrally formed with the support structure.

The support structure and the closure element are advantageously arranged in the same axial section of the shaft as the radial passage. It is quite possible that in the same axial shaft portion over the circumference of the valve housing offset more radial passages are provided. In this case, by rotating the shaft and thus also the support structure and the closure element, for example a first radial passage with respect to the valve interior and / or with respect to another valve port can be opened, and a second radial passage arranged circumferentially offset from the first radial passage with respect to the Valve interior are closed. Of course, in the same axial shaft portion over the circumference of the shaft and a plurality of individual support structures may be arranged, each with a closure element, so that the above, circumferentially offset from one another radial passages can be released or closed at the same time when rotating the control body.

It is also possible that the radial passages are arranged axially offset from one another. Advantageously, in the case of an arrangement of a plurality of axial and / or circumferentially staggered radial passages, a corresponding number of support structures are provided, each with one or more closure elements. As a result, a single passage or, alternatively, multiple ports in combination can be enabled or disabled simultaneously or in a predetermined split pattern. Of course, an interconnection of the radial passages is also possible without the arrangement of an axial valve port, so that the interconnection can be done exclusively under radially arranged passages or valve connections. In particular, the valve inlet can also be arranged radially on the valve inner wall.

Overall, this makes it possible to provide a relatively compact, low-weight and cost-effective rotary slide valve, which enables a permanently reliable and low-wear operation. In addition, different interconnection variants of several valve connections are possible. Furthermore, only individual components of the valve, such as the closure element, are exchangeable for maintenance or repair of the rotary valve, so that relatively low maintenance and operating costs are made possible.

Preferably, the closure element is by an elastic spring element against the Valve inner wall of the valve housing biased. As a result, a leakage flow between the closure element and the valve inner wall can be avoided and a particularly tight closure of the valve connection can be effected. The spring element can be arranged such that a radial freedom of movement of the closure element is made possible, so that frictional wear on the closure element or on the inner wall of the thread can be reduced. The spring element may in principle be part of the closure element or the support structure, for example, the spring element may be formed as an elastic spring leg projecting on the support structure.

Preferably, the spring element is formed separately, in particular as a helical or spiral spring. Particularly preferably, the spring element surrounds the support structure at least partially radially. As a result, the control body and ultimately also the rotary valve can be made very compact.

Preferably, the elastic spring element bears against the closure element at a first end and against the shaft at the other end. In particular, the spring between the closure element and the shaft may be biased with a still free Federweganteil for compression. As a result, the control body can be made relatively simple and compact.

In an alternative embodiment of the invention, the elastic spring element bears against the closure element at the first end and against a shoulder formed on the support structure at the other end. As a result, the spring between the support structure and the closure element can be biased. In particular, the spring element and the closure element can then be placed on the support structure during assembly of the control body first in a pre-assembly and this then fastened as a closure assembly to the shaft and inserted together with the shaft in the valve housing. As a result, the closure assembly, for example, for different rotary slide valves, in particular for different sized rotary valve inner diameter, different sized passages and / or different sized spring biasing forces, pre-assembled and provided in different sizes, so that the final assembly of the control body can be simplified and designed particularly cost-effective ,

Preferably, the support structure is formed as a radially projecting from the shaft, in particular round, bolts. As a result, a particularly large flow cross-section can be formed within the valve housing, in particular in the valve interior, in the axial direction, so that a fluid mass flow between two valve connections can be passed through the valve interior in a particularly trouble-free manner.

In principle, the support structure may be integrally formed with the shaft and / or in one piece. Preferably, the support structure is formed separately. Particularly preferably, the support structure extends at least partially radially through the shaft. In particular, the support structure designed as a bolt can be inserted into a radial bore arranged in the shaft. This allows a particularly simple mounting of the support structure on the shaft.

The closure element preferably has a hollow-cylindrical guide section, in which the closure element at least partially radially surrounds the support structure, in particular for the slidable mounting of the closure element on the support structure. For this purpose, the support structure designed in particular as a bolt can have a receiving section for receiving the closure element on an axial end facing away from the shaft. The receiving portion may for example be formed by an axial shoulder on which the closure element can be placed with the hollow cylindrical guide portion on the support structure, so that the guide portion radially surrounds the receiving portion. In the region of the guide section, the closure element can be displaceably mounted axially along the support structure, in particular radially relative to the shaft. As a result, the closure element can slide along the valve inner wall of the valve housing in a particularly low-friction manner and bring about a particularly effective closing of the radial passage. Furthermore, the closure element can be mounted on the support structure in a particularly simple manner.

Preferably, the closure element for closing the radial passage on a flat-shaped locking part, which has a corresponding to the cylindrical valve inner wall of the valve housing curvature. As a result, the closure element can close the passage particularly effectively. Furthermore, the closure element can slide along the inner wall of the valve housing in a particularly low-friction manner. The blocking part can in particular be designed as a closure plate which serves as a valve disk and which bears with a flat side against the inner wall of the valve housing in a sliding-sealing manner. As a result, when the control body is rotated, the closure element can slide along the inner wall with a particularly low friction. In particular, the blocking member may be rotated away from the valve port to open a passage and rotated to close the valve port in front of the passage. To the full Closing the valve connection, the blocking part advantageously has a size corresponding to the passage, in particular the locking part is slightly larger in diameter than the passage formed. This allows a particularly effective closing and a particularly rapid opening of the radial passage.

Preferably, the locking part of the closure element for slidable sealing against the inner wall on a coating. The coating is arranged in particular on one of the inner wall facing side surface of the locking part of the closure element. The coating may in particular have a sealing effect or be regarded as a sealing element. Particularly preferably, the coating is made of plastic, preferably of polytetrafluoroethylene. This allows a particularly effective closing of the passage and a low-wear sliding.

Preferably, a plurality of radial passages are arranged on the valve inner wall, and provided on the shaft for each radial passage in each case a separate support structure, each with a closure element arranged thereon. In particular, for each arranged in an axial portion of the valve housing radial passage in each case a support structure with closure element may be arranged correspondingly. As a result, radial passages positioned in the circumferential direction and / or offset axially relative to one another can be released or closed individually or in combination by turning the control body, so that different interconnection options can be provided.

The invention will be explained in more detail with reference to a preferred embodiment with reference to the accompanying drawings. It show schematically

1 a perspective view of a rotary valve according to the invention in a partially exploded view, and

2 : A sectional view of the rotary valve.

In the 1 and 2 is in each case an inventive rotary valve 1 a motor vehicle cooling circuit, not shown, shown. The rotary valve 1 includes a cylindrical valve housing 10 with a cylindrical valve inner wall 14 which extends along a longitudinal axis A1 and a cylindrical valve interior 16 limited. Inside the valve housing 10 is a rotatable about the longitudinal axis A1 and / or slidably mounted along the longitudinal axis A1 control body 20 arranged in the 1 for better clarity outside or next to the valve body 10 is shown.

The valve housing 10 has an axial end 15 a coaxial with the longitudinal axis A1 aligned axial valve inlet 11 on. The valve inlet 11 can with a pump channel, not shown 100 be connected and have an inlet-side pressure P1. At the valve inner wall 14 has the valve body 10 a first radial valve outlet disposed perpendicular to the longitudinal axis A1 12.1 with a first radial passage 13.1 and a second radial valve outlet disposed perpendicular to the longitudinal axis A1 12.2 with a second radial passage 13.2 on. This on the cylindrical valve housing 10 radially arranged valve outlets 12.1 . 12.2 or passages 13.1 . 13.2 are both in the axial direction and in the circumferential direction of the valve housing 10 offset from each other, in the present case in the circumferential direction at an angle to each other of about 45 degrees. The first valve connection 12.1 forms, for example, a valve outlet and, for example, a coolant channel, not shown 200 assigned to which an outlet-side pressure P2 is applied. This valve outlet 12.1 For example, it can be connected to a battery cooling channel, not shown, for temperature control of a vehicle battery, not shown. The second valve connection 12.2 can also form a valve outlet and a coolant channel, not shown 201 be assigned, for example, a not shown electric motor cooling duct for cooling an electric motor, not shown. At the second valve outlet 12.2 may be an exhaust-side pressure P3, wherein usually the outlet-side pressure P2, P3 is formed in each case less than the inlet-side pressure P1.

Inside the valve housing 10 is the through the valve inner wall 14 limited passageway or valve interior 16 formed, which can be flowed through by a medium, in particular by the coolant. The valve interior 16 is always with the axial valve connection 11 freely connected. For stepless control of a passage flow is between the radial valve ports 12.1 . 12.2 and the axial valve port 11 or the valve interior 16 the rule body 20 intended.

The rule body 20 is designed as a cylindrical rotary valve and has a shaft 21 on, which is arranged coaxially to the longitudinal axis A1 and in the axial direction through the entire valve housing 10 extends. The wave 21 can axially with a drive, not shown, for moving and / or rotating the control body 20 be connected. The wave 21 is formed as a solid shaft and facing an inner diameter D1 of the valve housing 10 a much smaller diameter D2. This allows radially between the shaft 21 and the inner wall 14 a fluid flow through the valve interior 16 take place, for example in the axial direction. By turning the control body 20 around the valve longitudinal axis A1, a flow between the axial valve inlet 11 and the valve outlets 12.1 . 12.2 be released or closed, in particular, the passages 13.1 . 13.2 be released or closed. To close the first passage 13.1 opposite the valve interior 16 - And thus also with respect to the axial valve inlet 11 and the second valve outlet 12.2 - assigns the wave 21 a first support structure 22.1 with a first closure element 23.1 on. To close the second passage 13.2 opposite the valve interior 16 - And thus also with respect to the axial valve port 11 and the first valve outlet 12.1 - assigns the wave 21 a second support structure 22.2 with a second closure element 23.2 on. The supporting structures 22.1 . 22.2 are formed separately and both in the axial direction and in the circumferential direction of the shaft 21 offset from each other, in the present case in the circumferential direction at an angle to each other of 90 degrees.

The supporting structures 22.1 . 22.2 In the present case, each is designed as a round valve rod or as a bolt, each of which is of the shaft 21 protrudes radially outward. The bolt 22.1 . 22.2 extends through one of the shaft 21 radially oriented and advantageously conical bore, which in particular in the 2 is recognizable. This allows the bolt 22.1 . 22.2 in a relatively simple manner radially into the bore of the shaft 21 used and mounted. The supporting structures 22.1 . 22.2 are thereby with the wave 21 and thus arranged rotatably to each other. At a free end, the support structures 22.1 . 22.2 each a receiving section 27.1 . 27.2 for receiving the radially between the support structure 22.1 . 22.2 and the inner wall 14 of the housing 10 arranged closure element 23.1 . 23.2 on. This advantageous embodiment of the cross section of the valve interior 16 only insignificantly reduced, so that an axial flow through the interior 16 can be done almost trouble-free.

The closure element 23.1 . 212 each comprises a plate-shaped locking part 24.1 . 24.2 and a sleeve-shaped guide portion 26.1 . 26.2 ,

The blocking part 24.1 . 24.2 is each at one of the shaft 21 remote radial side of the closure element 23.1 . 23.2 arranged. At the locking part 24.1 . 24.2 is one each from the shaft 21 opposite side surface 25.1 . 25.2 arranged, with which the rule body 20 on the inner wall 14 of the valve housing 20 slidably abuts. The side surface 25.1 . 25.2 each serves in particular for closing the passage 13.1 . 13.2 and may for this purpose a sealing coating, not shown here 29.1 . 29.2 exhibit. The blocking part 24.1 . 24.2 advantageously has an areal size, which is slightly larger than the cross section of the respective passage 13.1 . 13.2 , In addition, the closure element 23.1 . 23.2 in the blocking part 24.1 . 24.2 one to the inner wall 14 corresponding curvature, so that the closure element 23.1 . 23.2 flat on the inner wall 14 can be present.

The hollow cylindrical guide section 26.1 . 26.2 extends radially to the shaft 21 and serves to hold and guide the closure element 23.1 . 23.2 in the receiving section 27.1 . 27.2 the supporting structure 22.1 . 22.2 , In particular, the closure element 23.1 . 23.2 with the guide section 26.1 . 26.2 from radially outside to the support structure 22.1 . 22.2 fitted, wherein the closure element 23.1 . 23.2 the supporting structure 22.1 . 22.2 in the guide section 26.1 . 26.2 or in the receiving section 27.1 . 27.2 radially surrounds. In this area is the closure element 23.1 . 23.2 opposite the support structure 22.1 . 22.2 mounted limited movable, in particular radially to the shaft 21 displaceable. This can be done while turning the control body 20 a friction of the closure element 23.1 . 23.2 on the inner wall 14 be reduced or minimized.

To avoid a leakage flow in the closed state of a valve connection 12.1 . 12.2 and for improved guidance of the closure element 23.1 . 23.2 along the inner wall 14 when turning the control body 20 is an elastic spring element 28.1 . 28.2 intended. The spring element 28.1 . 28.2 is presently designed as a spiral spring and between the closure element 23.1 . 23.2 and the wave 21 arranged. In particular, the spring element 28.1 . 28.2 with a first end on the closure element 23.1 . 23.2 and with the other end on the shaft 21 supported. This will be the closure element 23.1 . 23.2 opposite the wave 21 radially outward against the valve inner wall 14 biased. Alternatively, the spring 28.1 . 28.2 be supported on a arranged on the support structure paragraph, which is not shown in the present case.

The embodiment of the present rotary valve 1 , in particular the arrangement of the passages 13.1 . 13.2 at an angle to each other of about 45 degrees and the arrangement of the support structures 22.1 . 22.2 with closure elements 23.1 . 23.2 at an angle to each other of about 90 degrees, allows the rotation of the control body 20 in that the first valve outlet 12.1 opposite the valve inlet 11 only half open while the second valve outlet 12.2 opposite the valve inlet 11 can be completely closed as it is in the 2 is shown. This setting can be applied, for example, in a vehicle standstill, in which the batteries not shown here - for example, during a charge - are cooled, but not the electric motor.

When turning the control body 2 , for example in the in 2 shown counterclockwise, the first passage 13.1 opposite the valve inlet 11 completely closed during the second passage 13.2 opposite the valve inlet 11 can be opened halfway. This setting can be applied, for example, when driving at low outdoor temperatures, in which only the presently not shown electric motor is moderately cooled.

Upon further rotation of the control body 2 in the same direction as before, the first passage 13.1 opposite the valve inlet 11 half open and the second passage 13.2 be fully opened. This setting can be used, for example, when starting to drive, in which the cooling effect is to be achieved primarily on the presently not shown electric motor instead of the presently not shown batteries.

Next can also both passages 13.1 . 13.2 or valve outlets 12.1 . 12.2 be fully opened, which, for example, at high ambient temperatures, sufficient cooling can be achieved in the presently not shown electric motor and the batteries not shown here.

It should be clear that the main claim is not limited to the embodiment described. As already mentioned, an adaptation of the formed as a movable body shaft or the arrangement of the individual passages, valve connections, in particular valve inlet and valve outlet, and the support structure with closure element to the particular requirements of the rotary valve for the expert. Accordingly, both more and fewer valve ports, radial passages and / or support structures may be provided, each with a closure element. In addition, an unequal number of radial passages and support structures, each with a closure element may be provided, for example, in the arrangement of a plurality of radial passages in an axial plane of the valve housing. Of course, the cooling circuits and components connected to the valve connections, such as, for example, the sealing element, are listed here only by way of example and can be of any type.

LIST OF REFERENCE NUMBERS

1

Rotary valve

10

valve housing

11

valve inlet

12.1

radial valve outlet

12.2

radial valve outlet

13.1

radial passage

13.2

radial passage

14

Valve inside wall

15

axial end

16

Valve interior

20

control body

21

Wave, body

22.1

Support structure, management structure

22.2

Support structure, management structure

23.1

closure element

23.2

closure element

24.1

blocking part

24.2

blocking part

25.1

closure surface

25.2

closure surface

26.1

guide section

26.2

guide section

27.1

receiving portion

27.2

receiving portion

28.1

elastic spring element

28.2

elastic spring element

29.1

coating

29.2

coating

100

Coolant channel

200

Coolant channel

201

Coolant channel

P1

inlet pressure

P2

outlet

P3

outlet

D1

Inner diameter housing

D2

Outer diameter shaft

A1

longitudinal axis

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

• EP 2314900 A2 [0006]

Claims (11)

Rotary valve ( 1 ) of a motor vehicle cooling circuit, with - a valve housing ( 10 ), one of a valve inner wall ( 14 ) limited cylindrical valve interior ( 16 ) with at least one valve inlet ( 11 ), at least one valve outlet ( 12.1 . 12.2 ) and a radial passage ( 13.1 . 13.2 ) between the valve inlet ( 11 ) and the valve outlet ( 12.1 . 12.2 ), and - one in the valve housing ( 10 ) movably mounted control body ( 20 ) for regulating the passage ( 13.1 ., 13.2 ), characterized in that the control body ( 20 ) one coaxially through the valve interior ( 16 ) extending shaft ( 21 ), at which for closing the radial passage ( 13.1 ., 13.2 ) one of the shaft ( 21 ) projecting radially outward support structure ( 22.1 . 22.2 ) with a on the support structure ( 22.1 . 22.2 ) mounted closure element ( 23.1 . 23.2 ), wherein the closure element ( 23.1 . 212 ) on the valve inner wall ( 14 ) slidably abuts and against the shaft ( 21 ) is spring-loaded slidably mounted in the radial direction. Rotary valve ( 1 ) according to claim 1, characterized in that the closure element ( 23.1 . 23.2 ) by an elastic spring element ( 28.1 . 28.2 ) against the valve inner wall ( 14 ) is biased. Rotary valve ( 1 ) according to claim 2, characterized in that the spring element ( 28.1 . 28.2 ) the supporting structure ( 22.1 . 22.2 ) at least partially surrounds radially. Rotary valve ( 1 ) according to one of claims 2 or 3, characterized in that the spring element ( 28.1 . 28.2 ) on the closure element ( 23.1 . 23.2 ) and on the shaft ( 21 ) is present. Rotary valve ( 1 ) according to one of claims 2 or 3, characterized in that the spring element ( 28.1 . 28.2 ) on the closure element ( 23.1 . 23.2 ) and on one of the support structure ( 22.1 . 22.2 ) formed shoulder. Rotary valve ( 1 ) according to one of the preceding claims, characterized in that the supporting structure ( 22.1 . 22.2 ) is formed as a bolt. Rotary valve ( 1 ) according to one of the preceding claims, characterized in that the supporting structure ( 22.1 . 22.2 ) at least partially through the wave ( 21 ). Rotary valve ( 1 ) according to one of the preceding claims, characterized in that the closure element ( 23.1 . 23.2 ) a hollow cylindrical guide section ( 26.1 . 26.2 ) having the support structure ( 22.1 . 22.2 ) at least partially surrounds the sliding bearing. Rotary valve ( 1 ) according to one of the preceding claims, characterized in that the closure element ( 23.1 . 23.2 ) for closing the passage ( 13.1 . 13.2 ) a flat formed locking part ( 24.1 . 24.2 ), one to the cylindrical inner wall ( 14 ) has corresponding curvature. Rotary valve ( 1 ) according to claim 9, characterized in that the blocking part ( 24.1 . 24.2 ) for sliding sealing against the inner wall ( 14 ) a coating ( 29.1 . 29.2 ) having. Rotary valve ( 1 ) according to one of the preceding claims, characterized in that on the valve inner wall ( 14 ) a plurality of radial passages ( 13.1 . 13.2 ) and on the shaft ( 21 ) for each passage ( 13.1 . 13.2 ) each have a separate support structure ( 22.1 . 22.2 ) each having a closure element arranged thereon ( 23.1 . 23.2 ) is provided.

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