DE102013008195A1 - rotary vane - Google Patents

Abstract

The invention relates to a rotary slide valve (1) comprising a rotary slide valve housing (2) with an inlet channel (3) and an outlet channel (4) for a flow through the rotary slide valve housing (2) and with one in the rotary slide valve housing (2) rotatable about an axis of rotation (6) mounted rotating body (5), which has a rotating body opening (7, 8), wherein to form a flow path (9, 15) for a fluid through the rotary valve (1), the rotating body opening (7, 8) through the rotation (18) of the rotating body (5) can be positioned in a variable overlap with an opening cross section (10) of the inlet channel (3) and / or the outlet channel (4). According to the invention, a locking slide (11) is arranged in the rotating body (5), which is provided for fluid-tight covering of at least one rotating body opening (8) and / or for fluid-tight division of the rotating body (5) into two chambers, the locking slide ( 11) when a fluid temperature exceeds or falls below a threshold temperature, a temperature-dependent element (12) is translationally displaceable in the rotating body (5) along the axis of rotation (6).

Description

The invention relates to a rotary valve having a rotary valve housing with an inlet channel and an outlet channel for a flow through the rotary valve housing and with a rotatably mounted in the rotary valve housing about a rotational axis rotary body having a rotary body opening, wherein the rotary body opening to form a flow path for a fluid through the rotary valve can be positioned by the rotation of the rotary body in variable overlap with an opening cross-section of the inlet channel and / or the outlet channel.

A rotary valve of the type mentioned is from the document DE 10 2009 020 186 A1 known as a turntable. The document shows a fail-safe turntable for a coolant circuit to avoid damage to an internal combustion engine due to insufficient cooling capacity in case of failure of the turntable. For this purpose, a thermostatic valve is arranged in a rotary valve housing, which opens a parallel to a rotary valve guided flow path when a limit temperature of the coolant is exceeded. This bypass of the rotary valve allows in case of failure of the turntable, the continuous flow of the coolant.

Furthermore, the document shows DE 10 2010 026 368 A1 a fail-safe rotary valve with a continuously variable adjustment of a fluid flow. The rotary valve has a rotary valve housing with at least one therein about a rotational axis rotatably mounted Querschnittsverstellglied, wherein the rotary valve housing has at least one housing through-flow opening with a valve seat by twisting the Querschnittsverstellgliedes in variable overlap with at least one rotary valve flow-through, to form a flow path for a fluid through the rotary valve, can be brought. The Querschnittsverstellglied is displaced after exceeding a threshold temperature of the fluid to form an alternative flow path of a temperature-dependent element along the axis of rotation of the valve seat.

From the publication DE 10 2006 038 213 A1 a thermostatic valve for a coolant circuit of an internal combustion engine is known. Also, this thermostatic valve has a bypass, which is released by a translational movement of a hollow spherical valve element. The valve element has at least one opening which, in a first end position, is separated from a radiator connection and faces the radiator connection in a second end position. In the area of the radiator connection, a sealing arrangement adapted to the spherical shape of the valve element is provided. The seal arrangement ensures that the medium outside the valve element does not flow into the radiator connection. Finally, a drive for the spherical shell-shaped valve element is provided, which acts eccentrically to the axis of rotation on the valve element. In the one end or also basic position, in which the valve element can be biased by a spring, the seal assembly is sealingly against the outside of the valve element, so that the radiator port is shut off. However, the machine connection is connected to the bypass port via the corresponding position of the valve element. In the second end position, the connection for the bypass branch is covered by the valve element. In an intermediate position of the valve element between the end positions a division of the cooling medium is made. Depending on the passage cross section flows more or less of it to the radiator connection or to the bypass branch.

Against this background, the invention has the object, a rotary valve of the type mentioned in such a way that the temperature-dependent change in the flow of the rotary valve in normal operation is possible.

This object is achieved with a rotary valve according to the features of claim 1. The dependent claims relate to particularly expedient developments of the invention.

According to the invention, therefore, a rotary valve is provided, in which a locking slide is arranged in the rotary body, which is provided for fluid-tight coverage of at least one rotary body opening and / or for fluid-tight subdivision of the rotary body in two chambers, wherein the gate valve when exceeding or falling below a threshold temperature of the fluid a temperature-dependent element along the axis of rotation in the rotary body and is translationally displaceable relative to the rotary body. This makes it possible to change the flow cross-section of the existing flow path or to form or interrupt another flow path through the rotary valve. By the movement of the locking slide in the rotary body individual rotary body openings are covered or exposed or assigned to another of the chambers. The locking slide can be made rotatable or drehunbeweglich relative to the rotary body.

The rotary valve according to the invention is intended in particular for use in a cooling fluid circuit of an internal combustion engine. In an internal combustion engine, the required cooling capacity or the location to be cooled by the Operating state of the internal combustion engine dependent. The rotary valve according to the invention also makes it possible to influence the flow of the fluid during normal operation as a function of the temperature of the cooling fluid and thus to adapt the coolant flow to the different requirements of the operating states of the internal combustion engine with simple means. At the same time an emergency operation of the rotary valve for securing against a failure of the rotary valve, in particular its rotary drive is possible.

It has proved to be useful that at least one further inlet channel and / or a further outlet channel is formed in the rotary valve housing and the rotary valve has at least one further rotary body opening which in permanent overlap or by the rotation of the rotary body in variable overlap with the further inlet channel and / or the further outlet channel is positioned. As a result, an enlargement of the flow cross-section or the formation or blocking of a second, preferably independent, flow path is possible, in particular in regular operation.

The intake ports and / or exhaust ports may be associated with different cooling circuits, such as a cylinder head and a crankcase of an internal combustion engine.

Furthermore, it is favorable that an opening cross-section of an inlet channel and / or an outlet channel is assigned to an end face of the cylindrical rotary body. The end faces are the flat, circular surfaces, which are also called footprint in geometry. A rotary body opening in at least one of the end sides makes possible, in at least partial covering with the opening cross-section, an axially parallel flow of the fluid. Rotary body opening and opening cross-section are preferably arranged concentrically to the axis of rotation. However, it is also an eccentric arrangement of one or more rotary body openings or opening cross-sections executable to one of the end faces, whereby influencing the fluid flow through the rotary valve, in particular by means of the rotation of the rotary body and / or the gate valve is possible. At least one of the rotary body openings is arranged in the lateral surface of the cylindrical rotary body. There are also embodiments of the invention are possible in which all, in particular more than two rotary body openings are arranged in the lateral surface in one or in different transverse planes.

The translational movement of the locking slide relative to the rotary body by means of a temperature-dependent element. This element is ideally designed as a wax expansion element and / or a bimetal. Such elements have proven to be extremely robust. According to one embodiment, a compression spring and / or a tension spring are arranged on the locking slide. The compression spring or the tension spring serve as a restoring element and have a direction of action opposite to the temperature-dependent element. The element is arranged either in the rotary body or outside the rotary body. In a positioning of the element in the rotary body, this is supported for example on a fluid-permeable star carrier.

The blocking slide consists of a dividing wall which is perpendicular to the axis of rotation of the rotary body and is preferably designed as a piston which is fluid-tight with respect to the inner wall of the rotary body. In order to cover at least one opening cross-section of an inlet channel and / or outlet channel, the locking slide according to a development has an at least partially axially extending cylinder extension. The cylinder shoulder abuts with its outer surface on the inner surface of the rotating body. A further embodiment of the rotary valve comprises a disc section, which is connected away from the partition with the cylinder extension. The disk portion is suitable for covering a rotating body opening in an end face.

A preferred embodiment of the rotary valve provides that the locking slide in its partition wall has an axial opening which connects the chambers on both sides of the locking slide. As a result, a fluid exchange between the chambers is possible and the inlet channels or outlet channels of a fluid circuit can be arranged on both sides of the partition wall.

On the other hand, a fluid-tight closed partition opens up the possibility that each of the chambers separated from one another by the dividing wall is assigned to a different fluid circuit. This makes it possible to influence the flow in several, but at least two independent fluid circuits with a single rotary valve according to the invention in normal operation and emergency operation.

As a supplemental embodiment, it is possible, in particular for influencing a plurality of independent fluid circuits with a rotary valve, that at least one further locking slide is arranged in the rotary body. These multiple locking slide in a rotary body, for example, either as a partial piston with a dividing plane parallel to the axis of rotation or as a separate, each having a distance and each having the entire cross-section of the rotating body be performed covering piston. Each of the gate valves is connected to its own temperature-dependent element. As a result, the locking slide are relative to each other, in particular translationally movable. An alternative embodiment provides that a plurality of gate valves are connected to a common temperature-dependent element.

The invention allows numerous embodiments. To further clarify its basic principle, some of them are shown in the drawing and will be described below. This shows in

1 a schematic representation of a first embodiment of a rotary valve;

2 a schematic representation of the in 1 shown rotary valve;

3 a schematic, spatial representation of the in 1 shown rotary valve;

4 a schematic representation of a second embodiment of the rotary valve;

5 a schematic representation of a third embodiment of the rotary valve;

6 a schematic representation of a fourth embodiment of the rotary valve;

7 a schematic representation of a fifth embodiment of the rotary valve;

8th a schematic representation of a sixth embodiment of the rotary valve;

9 a schematic representation of a seventh embodiment of the rotary valve;

10 a schematic representation of an eighth embodiment of the rotary valve;

11 a schematic representation of a ninth embodiment of the rotary valve;

12 a schematic representation of a tenth embodiment of the rotary valve;

13 a schematic representation of a locking slide.

The 1 . 2 and 3 show a first embodiment of a rotary valve 1 , The rotary valve 1 includes a rotary valve housing 2 with an inlet channel 3 and two outlet channels 4 for a flow through the rotary valve housing 2 and a rotating body 5 , The rotary body 5 is in the rotary valve housing 2 around a rotation axis 6 rotatably mounted. The rotary body 5 has three rotary body openings 7 . 8th on. To form a flow path 9 for a fluid through the rotary valve 1 are the revolutions openings 7 . 8th by turning the rotating body 5 in variable overlap with the opening cross sections 10 the inlet channel 3 and the outlet channels 4 positionable. In the rotary body 5 is a gate valve 11 arranged for fluid-tight coverage of at least one rotary body opening 8th is provided. To the rotation 18 of the rotary body 5 is this over a wave 17 connected to a drive, not shown.

1 shows the rotary valve 1 at low fluid temperature. An axially extended cylinder shoulder 14 on the gate valve 11 is in a fluid-tight cover at the in 2 shown rotary body opening 8th positioned.

2 shows the rotary valve 1 at high fluid temperature. When a threshold temperature of the fluid was exceeded in the rotating body 5 the gate valve 11 from a temperature dependent element 12 along the axis of rotation 6 moved in translation 13 , In the position of the locking slide now shown 11 is the revolver opening 8th free and open, so that another, complementary flow path 15 can train. Through the further flow path 15 more fluid is moved and the cooling capacity of the cooling circuit increases. If the fluid cools, the gate valve becomes 11 from the temperature-dependent element 12 along the axis of rotation 6 moved in the opposite direction 16 until the in 1 reached starting position is reached. The element 12 rests on a fluid-permeable star carrier 19 from.

3 shows an example of a spatial representation of the rotating body 5 in the rotary valve housing 2 , The rotation 18 of the rotary body 5 around the axis of rotation 6 is indicated by a double arrow. The rotary body 5 has a cylindrical shape with a lateral surface 21 and two end faces 22 ,

4 shows a second embodiment of the rotary valve 1 in which the element 12 in the rotary body 5 is arranged. The inlet channel 3 this embodiment is a rotary body opening 23 in the front side 22 of the rotary body 5 assigned. The rotary valve 1 is set so that at a low fluid temperature, the two outlet channels 4 associated rotary body openings 7 . 8th are open. The lock slider 11 is in the position shown by a compression spring 20 held. When the fluid temperature increases, the gate valve becomes 11 from the element 12 in a the rotary body opening 8th moving covering position 16 , The cover of the rotary body opening 8th is through the cylinder neck 14 , like one Piston designed locking slide 11 reached. Cold fluid flows from the inlet channel 3 to the two outlet channels 4 , If required, one of the two outlet channels 4 or as shown, both outlet channels 4 through a rotation 18 of the rotary body 5 getting closed.

5 shows a section of a third embodiment of the rotary valve 1 , In this rotary valve 1 is the element 12 outside the rotary body 5 in an exhaust duct 3 arranged. The gate valve 11 has a fluid-tight partition 24 , which are perpendicular to the axis of rotation 6 is oriented. In the position shown the locking slide 11 lies the dividing wall 24 fluid-tight at the front-side rotary body opening 23 at. If the fluid temperature exceeds a threshold, then the gate valve 11 from the element 12 against the compression spring 20 moves and the revolver opening 23 open. Further outlet channels 3 and associated with these rotary body openings 7 of the rotary valve 1 are not shown here.

6 shows a section of a fourth embodiment of the rotary valve 1 , In this rotary valve 1 divided the gate valve 11 with the partition 24 the rotating body 5 fluid-tight in two chambers 25 . 26 , Thus, the flow paths of two different separate cooling circuits by means of a rotary valve 1 to be influenced.

7 shows a section of a fifth embodiment of the rotary valve 1 , In this rotary valve 1 has the gate valve 11 an axial opening 27 which the chambers 25 . 26 on both sides of the gate valve 11 combines.

8th shows a section of a sixth embodiment of the rotary valve 1 , In this rotary valve 1 has the gate valve 11 a cylinder approach 14 on, which extends in sections differently far axially. The cylinder approach 14 lies with its outer surface 28 fluid-tight on the inner surface 29 of the rotary body 5 at.

9 shows a section of a seventh embodiment of the rotary valve 1 , In this rotary valve 1 has the gate valve 11 a disc section 30 on top of the partition 24 removed with the cylinder neck 14 connected is. The disc section 30 is for fluid-tight covering a not shown here, to the axis of rotation 6 of the rotary body 5 eccentric in one end face 22 arranged rotary body opening 23 suitable.

10 shows a section of an eighth embodiment of the rotary valve 1 , In this rotary valve 1 are in the rotary body 5 two gate valves 11 . 31 arranged. The gate valves 11 . 31 are as part pistons with a parallel to the axis of rotation 6 oriented division level.

11 shows a section of a ninth embodiment of the rotary valve 1 , In this rotary valve 1 are, as well as in 10 in the revolving body 5 two gate valves 11 . 31 arranged. The gate valves 11 . 31 are as independent, each with a distance and each having the entire cross-section of the rotating body 5 covering piston performed. The gate valves 11 . 31 are mutually immovable and with a common temperature-dependent element 12 connected.

12 shows a section of a tenth embodiment of the rotary valve 1 , In this rotary valve 1 are, as well as in 11 in the revolving body 5 two gate valves 11 . 31 arranged. Each is the gate valve 11 . 31 with its own temperature-dependent element 12 . 32 connected. As a result, the gate valves 11 . 31 relative to each other, in particular translationally movable.

13 shows a schematic representation of a locking slide 11 with a cylinder approach 14 , an outer surface 28 and a star-shaped partition 24 with four openings 27 , In the center, concentric to the axis of rotation, not shown 6 , has the dividing wall 24 a reinforcement 33 at which the temperature-dependent element 12 can be applied.

LIST OF REFERENCE NUMBERS

1

rotary vane

2

Rotary slide housing

3

inlet channel

4

exhaust port

5

rotating body

6

axis of rotation

7

Rotating body opening

8th

Rotating body opening

9

flow path

10

Opening cross-section

11

blocking slide

12

element

13

Movement (gate valve)

14

cylindrical projection

15

flow path

16

Movement (gate valve)

17

wave

18

rotation

19

star support

20

compression spring

21

lateral surface

22

front

23

Rotating body opening

24

partition wall

25

chamber

26

chamber

27

perforation

28

Outer surface (cylinder neck)

29

Inner surface (rotating body)

30

disk portion

31

Another gate valve

32

Another element

33

reinforcement

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• DE 102009020186 A1 [0002]
• DE 102010026368 A1 [0003]
• DE 102006038213 A1 [0004]

Claims (10)

Rotary valve ( 1 ) comprising a rotary valve housing ( 2 ) with an inlet channel ( 3 ) and an outlet channel ( 4 ) for a flow through the rotary valve housing ( 2 ) and with a in the rotary valve housing ( 2 ) about a rotation axis ( 6 ) rotatably mounted rotary body ( 5 ), which has a rotary body opening ( 7 . 8th . 23 ), wherein to form a flow path ( 9 . 15 ) for a fluid through the rotary valve ( 1 ) the rotary body opening ( 7 . 8th . 23 ) by the rotation ( 18 ) of the rotary body ( 5 ) in variable overlap with an opening cross-section ( 10 ) of the inlet channel ( 3 ) and / or the outlet channel ( 4 ) is positionable, characterized in that in the rotary body ( 5 ) a gate valve ( 11 ) is arranged, for the fluid-tight coverage of at least one rotary body opening ( 8th . 23 ) and / or for the fluid-tight subdivision of the rotary body ( 5 ) in two chambers ( 25 . 26 ) is provided, wherein the locking slide ( 11 ) when exceeding or falling below a threshold temperature of the fluid from a temperature-dependent element ( 12 ) along the axis of rotation ( 6 ) in the rotary body ( 5 ) is translationally displaceable. Rotary valve ( 1 ) according to claim 1, characterized in that in the rotary valve housing ( 2 ) at least one further inlet channel ( 3 ) and / or another outlet channel ( 4 ) is formed and the rotary valve ( 1 ) at least one further rotary body opening ( 7 . 8th . 23 ), which in permanent overlap or by the rotation ( 18 ) of the rotary body ( 5 ) in variable overlap with the further inlet channel ( 3 ) and / or the further outlet channel ( 4 ) is positioned. Rotary valve ( 1 ) according to claims 1 or 2, characterized in that an opening cross-section ( 10 ) of an inlet channel ( 3 ) and / or an outlet channel ( 4 ) on a front side ( 22 ) of the cylindrical rotating body ( 5 ) is arranged. Rotary valve ( 1 ) according to at least one of the preceding claims, characterized in that at least one of the rotary body openings ( 7 . 8th ) in the lateral surface ( 21 ) of the cylindrical rotating body ( 5 ) is arranged. Rotary valve ( 1 ) according to at least one of the preceding claims, characterized in that the temperature-dependent element ( 12 ) is a Wachsdehnelement and / or a bimetal. Rotary valve ( 1 ) according to at least one of the preceding claims, characterized in that the locking slide ( 11 ) as a relative to the inner wall of the rotary body ( 5 ) is formed fluid-tight piston. Rotary valve ( 1 ) according to at least one of the preceding claims, characterized in that on the locking slide ( 11 ) a compression spring ( 20 ) and / or a tension spring is arranged, which as a restoring element to the temperature-dependent element ( 12 ) has opposite effective direction. Rotary valve ( 1 ) according to at least one of the preceding claims, characterized in that the locking slide ( 11 ) an axial opening ( 27 ), which the chambers ( 25 . 26 ) on both sides of the gate valve ( 11 ) connects. Rotary valve ( 1 ) according to at least one of the preceding claims, characterized in that in the rotary body ( 5 ) at least one further gate valve ( 31 ) is arranged. Rotary valve ( 1 ) according to at least one of the preceding claims, characterized in that a plurality of gate valves ( 11 . 31 ) with a common temperature-dependent element ( 12 ) are connected.

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