DE102013111619A1 - thermostatic valve - Google Patents

Abstract

The invention relates to a thermostatic valve (1, 20) having a valve housing (2, 41) with a fluid inlet (16, 17, 42) and a fluid outlet (16, 17, 43), with one received in the valve housing (2, 41) Actuator (3, 23, 46) having a housing (5, 24), with a switching element (4, 22, 30, 40, 50), which is operatively connected to the actuator (3, 23, 46) for controlling a fluid connection between Fluid inlet and fluid outlet, wherein from the housing (5, 24) protrudes a plunger which is axially fixed to the valve housing and the housing (5, 24) is received axially displaceable in the valve housing, wherein the housing (5, 24) in the area its opposite end portions is mounted by means of plain bearings in the valve housing, wherein the switching element (4, 22, 30, 40, 50) relative to the housing of the actuator (3, 23, 46) is rotatably arranged.

Description

The invention relates to a thermostatic valve with an actuator for actuating a switching element.

Thermostatic valves, in particular for the coolant circuit of a motor vehicle, have become widely known in the art. The DD 96 766 and the DE 1917 925 each disclose a thermostatic valve with an actuator with Dehnstoffmaterialfüllung in which a control piston is accommodated in a filled with the expansion material housing and protrudes with a piston rod or plunger out of the housing, the piston rod or plunger is mounted end in the housing of the thermostat. Upon expansion of the expansion material, the housing of the actuator is displaced relative to the piston or the piston rod / plunger and slides against the restoring force of a spring again at its support of the piston rod / plunger opposite end in an opening of the housing of the thermostat. With the housing of the actuator, a plate is connected as a sliding element, which lifts on expansion of the expansion of an abutment and a flow opening between the fluid inlet and fluid outlet releases.

In this case, the actuator is firmly clamped at its one distal end by means of the piston rod / plunger and slidably mounted at its opposite distal end to the housing of the actuator.

This arrangement of the bearings can lead to tilting of the actuator when the sealing connection and guidance of the piston rod into the housing of the actuator is not optimally formed, resulting in a non-reproducible kinematics.

Therefore, it is the object of the present invention to provide a thermostatic valve, which has a stable design over the thermostatic valves of the prior art and yet is simple and inexpensive and has improved kinematics.

The object is achieved with the features of claim 1.

An embodiment of the invention relates to a thermostatic valve having a valve housing with a fluid inlet and a fluid outlet, with an actuator housed in the valve housing with a housing, with a switching element, which is operatively connected to the actuator for controlling a fluid connection between the fluid inlet and fluid outlet, wherein the Housing a plunger protrudes, which is axially fixed to the valve housing and the housing is received axially displaceable in the valve housing, wherein the housing is mounted in the region of its opposite end by sliding bearings in the valve housing, wherein the switching element rotatable relative to the housing of the actuator is arranged. As a result, the housing is supported substantially at its two end regions, so that reliable guidance of the longitudinal movement takes place and thus long-term reproducible results are achieved.

Furthermore, it is advantageous if the switching element in the valve housing is axially fixed but rotatable.

It is also expedient if the housing has a helical sliding guide, wherein the switching element has an engagement element which engages in the sliding guide.

It is particularly advantageous if the housing is acted upon by an energy store in the axial direction, wherein the force accumulator is arranged between the valve housing and the housing.

It is also expedient if the switching element is a cylindrical element which has an opening for the passage of a fluid on its outer circumference and / or on at least one end face.

It is also advantageous if the switching element has a shape of a spherical section which has an opening for the passage of a fluid on its outer circumference and / or on at least one end face.

Furthermore, it is alternatively advantageous if the switching element substantially has a shape of a disc which has an opening for the passage of a fluid on its outer circumference and / or on at least one end face.

It is also advantageous in the invention, when the housing has a cylinder chamber, with a piston received in the cylinder chamber, wherein the piston is provided with a piston rod which protrudes from the housing, wherein the cylinder chamber is filled with a medium.

It is particularly advantageous if the medium is an expansion material. Alternatively, it is useful if the medium is a magnetorheological fluid. In the following the invention will be explained in detail by means of an embodiment with reference to the drawing. In the drawing shows:

1 a schematic view of a thermostatic valve in section,

2 a schematic view of an alternative thermostatic valve in section,

3 a perspective view of a portion of a thermostatic valve with a rotatable switching element,

4 a rotatable switching element,

5 a view of a thermostatic valve with a rotatable switching element in a first operating position,

6 a view of a thermostatic valve with a rotatable switching element in a second operating position,

7 a view of a thermostat valve with rotatable switching element in a third operating position,

8th a view of the rotatable switching element according to 5 in a first operating position,

9 a view of the rotatable switching element according to 5 in a second operating position,

10 a view of the rotatable switching element according to 5 in a third operating position,

11 a view of a rotatable switching element in a first operating position, and

12 a view of a rotatable switching element in a second operating position.

The 1 and the 2 each show an embodiment of a valve 1 with a valve housing 2 and an actuator disposed therein 3 ,

The actuator 3 has a housing 5 with a cylinder space defined therein 6 with a medium filling 7 on. In the case 5 of the actuator protrudes a piston rod or a plunger 8th into it.

The actuator is over the plunger 8th or the piston rod in the valve housing 2 set, such that the distal end 9 of the plunger 8th is set in the valve body while the housing 5 of the actuator 3 in the valve housing 2 is slidably mounted. This is the case 5 at its distal end portions 10 . 11 in a receptacle of the valve housing 2 slidably received. The housing 5 is inside the valve body 2 by means of plain bearings 13 slidably mounted.

The valve 1 has a switching element 4 on, which is cylindrical, pot-like, spherical or disc-like and which with the housing 5 of the actuator 3 connected is.

The housing 5 of the actuator 3 is fixed in the axial direction but rotatable in the valve housing 2 arranged, with the housing 5 of the actuator against the energy storage 12 supported in the axial direction, so that a displacement of the housing 5 of the actuator 3 against the restoring force of the energy storage 12 he follows. The housing 5 has a slotted guide 14 on which screw in the housing 5 is introduced. The switching element has at its radially inner receiving area 15 for receiving the housing 5 an engagement element, which in the slotted guide 14 intervenes. Upon actuation of the actuator 3 through the medium in the housing, in particular the expansion material, there is an axial displacement of the housing 5 of the actuator 3 , resulting in a twist of the switching element 4 of the thermostatic valve 1 results to inlet and / or outlet openings 16 . 17 of the thermostatic valve 1 due to the displacement of the switching element 4 to be able to control.

The medium in the housing is preferably a Dehnstoffmaterial which thermally expands at a temperature increase and thus the piston crown of a piston or the plunger 8th pushed out of the housing and so with a fixed plunger 8th the housing 5 shifted axially.

The 3 shows in a schematic representation parts of a thermostatic valve 20 with a lid 21 as a housing part, a switching element 22 and an actuator 23 , The actuator 23 has a piston disposed within the cylinder space, which by means of the piston rod 27 is fixable, the housing 24 of the actuator 23 against the force of the energy store 25 is displaceable in the axial direction.

With the housing 24 is the switching element 22 via an actuating means 27 connected to that in the spiral gate guide 26 can engage, wherein the switching element 22 in the axial direction firmly in the housing 21 is arranged, wherein upon displacement of the housing 24 of the actuator 23 due to the intervention in the slotted guide 26 the switching element 22 is twisted. Thus, fluid flows can be controlled, in which the switching element 22 Inlet and / or outlet openings in the valve housing 2 of the valve 1 can open or close to be able to control a targeted flow through the valve can.

The 4 shows a switching element 30 in a perspective view. The switching element 30 is as a cylindrical component with a cylindrical outer wall 31 and with a radially inwardly disposed hollow cylindrical receptacle 32 formed for the housing of the actuator. Also, the switching element has a radially oriented end wall 33 on. For fluid control are in the cylindrical outer wall 31 as well as in the front wall 33 openings 34 . 35 educated. The openings 34 extend over part of the circumference of the outer wall and are through a central web 36 separated from each other. The openings 35 are formed either circular or kidney-shaped and extend over part of the circumferential extent of the end wall.

The 5 to 7 show a spherical segment-like switching element 40 in a valve housing 41 in each case another operating position. In this case, the switching element 40 in each case a different angular position relative to the valve housing 41 on. The 8th to 10 show the position of the switching element 40 together with the position of the actuator and the energy accumulator for the positions according to the 5 to 7 ,

In the 5 to 7 is with 42 a fluid inlet partially shown and with 43 the fluid outlet. In the position of the switching element 40 according to 5 locks the switching element with its upper wall 44 the fluid inlet.

In 6 the switching element is twisted about 45 ° upwards so that the openings 45 in the range of fluid inlet 42 and fluid outlet 43 are arranged and thus a fluid communication between the fluid inlet 42 and fluid outlet 43 is possible.

In 7 In turn, the switching element is rotated about 45 ° further upwards, leaving the openings 45 in the area of the fluid inlet 42 are arranged. But this is the fluid outlet through the wall 44 blocked. This is a fluid communication between fluid inlet 42 and fluid outlet 43 not possible.

The 8th to 10 show the respective position of the switching element 40 according to the position of 5 to 7 , at 8th is the actuator 46 arranged to the left, the shift towards the energy storage 47 is low. Due to the position of the actuator 46 with his backdrop guide 48 is the switching element 40 so that the openings 45 point forward and open the fluid outlet, with the wall 44 which faces upwards, blocks the fluid inlet.

at 9 is the actuator 46 arranged approximately centrally, the displacement in the direction of the energy storage 47 is partially completed. Due to the position of the actuator 46 with his backdrop guide 48 is the switching element 40 so that the openings 45 partially forward and upward and open the fluid outlet and the fluid inlet. This allows fluid communication between the fluid inlet and the fluid outlet.

at 10 is the actuator 46 arranged right, the shift towards the energy storage 47 is almost completed. Due to the position of the actuator 46 with his backdrop guide 48 is the switching element 40 so that the openings 45 point upwards and release the fluid inlet, while the forward wall 44 blocks the fluid outlet. Thus, no fluid communication between the fluid inlet and fluid outlet is possible.

The 11 and 12 show as a switching element 50 a disk 51 , which on a housing wall 52 the valve housing is rotatably arranged. Both the switching element 50 as well as the housing wall have openings 53 . 54 on that in 11 are not in overlap, so the valve is closed. In 12 are the openings 53 . 54 in overlap and the valve is open. The openings 53 . 54 are formed like a circle segment. Advantageously, other geometries could be used.

LIST OF REFERENCE NUMBERS

1

Valve

2

valve housing

3

actuator

4

switching element

5

casing

6

cylinder space

7

medium filling

8th

tappet

9

The End

10

end

11

end

12

power storage

13

bearings

14

link guide

15

reception area

16

Inlet and / or outlet opening

17

Inlet and / or outlet opening

20

thermostatic valve

21

cover

22

switching element

23

actuator

24

casing

25

power storage

26

link guide

27

actuating means

30

switching element

31

outer wall

32

admission

33

end wall

34

opening

35

opening

36

web

40

switching element

41

valve housing

42

fluid inlet

43

fluid outlet

44

wall

45

opening

46

actuator

47

power storage

48

link guide

50

switching element

51

disc

52

housing

53

opening

54

opening

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

• DD 96766 [0002]
• DE 1917925 [0002]

Claims (10)

Thermostatic valve ( 1 . 20 ) with a valve housing ( 2 . 41 ) with a fluid inlet ( 16 . 17 . 42 ) and a fluid outlet ( 16 . 17 . 43 ), with one in the valve housing ( 2 . 41 ) received actuator ( 3 . 23 . 46 ) with a housing ( 5 . 24 ), with a switching element ( 4 . 22 . 30 . 40 . 50 ), which with the actuator ( 3 . 23 . 46 ) is operatively connected to control a fluid connection between the fluid inlet and the fluid outlet, wherein from the housing ( 5 . 24 ) protrudes a plunger, which is axially fixed to the valve housing and the housing ( 5 . 24 ) is received axially displaceable in the valve housing, wherein the housing ( 5 . 24 ) is mounted in the region of its opposite end regions by means of sliding bearings in the valve housing, wherein the switching element ( 4 . 22 . 30 . 40 . 50 ) relative to the housing of the actuator ( 3 . 23 . 46 ) is arranged rotatable. Thermostatic valve according to claim 1, characterized in that the switching element ( 4 . 22 . 30 . 40 . 50 ) Is arranged axially fixed but rotatable in the valve housing. Thermostatic valve according to one of the preceding claims, characterized in that the housing ( 5 . 24 ) a spiral slotted guide ( 14 . 26 . 48 ), wherein the switching element ( 4 . 22 . 30 . 40 . 50 ) has an engagement element, which in the slotted guide ( 14 . 26 . 48 ) intervenes. Thermostatic valve according to one of the preceding claims, characterized in that the housing ( 5 . 24 ) from an energy store ( 12 . 25 . 47 ) is acted upon in the axial direction, wherein the energy storage ( 12 . 25 . 47 ) between the valve housing and the housing ( 5 . 24 ) is arranged. Thermostatic valve according to one of the preceding claims, characterized in that the switching element ( 4 . 22 . 30 ) is a cylindrical member having an opening for the passage of a fluid at its outer periphery and / or at least one end face. Thermostatic valve according to one of the preceding claims, characterized in that the switching element ( 40 ) has a shape of a spherical section, which has an opening for the passage of a fluid on its outer circumference and / or on at least one end face. Thermostatic valve according to one of the preceding claims, characterized in that the switching element ( 50 ) substantially a shape of a disc ( 51 ), which has on its outer circumference and / or on at least one end face an opening for the passage of a fluid. Thermostatic valve according to one of the preceding claims, characterized in that the housing ( 5 . 24 ) has a cylinder chamber, with a piston received in the cylinder chamber, wherein the piston is provided with a piston rod which protrudes from the housing, wherein the cylinder chamber is filled with a medium. Thermostatic valve according to one of the preceding claims, characterized in that the medium is a Dehnstoffmaterial. Thermostatic valve according to one of the preceding claims, characterized in that the medium is a magnetorheological fluid.

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