DE102023133444A1 - Volume flow controller - Google Patents

Abstract

The invention relates to a volume flow controller with a channel (1) and a control flap (2), wherein the control flap (2) is arranged in the channel (1) so as to be pivotable about a transverse axis (3), wherein the transverse axis (3) is held in place by a spring, wherein the channel (1) has at one end a counter bearing housing by means of a counter bearing cover (4) and at the other end a spring bearing housing by means of a spring bearing cover (5), wherein a spring force control mechanism (7) is arranged in the spring bearing housing, wherein the transverse axis (3) forms a pressure lever (6) which is arranged by means of a force transmitter pin (8) so as to bear against a leaf spring (9) of the spring force control mechanism (7), wherein the spring force control mechanism (7) is arranged in the spring bearing housing so as to be manually adjustable.

Description

Technical area

The invention relates to a volume flow controller according to the preamble of claim 1.

State of the art

Such devices, known as volume flow regulators, are available on the market in a wide variety of shapes and designs and are sometimes very complex and therefore require precise adjustment when they are installed. The control flap cannot even be fixed in place, but must be able to move in the flowing medium, especially in air, and adapt to the amount of flowing medium. It should be remembered that such flaps are usually located in very inaccessible places, so that they must be easily adjusted if necessary.

In the DE 100 14 901 C2 For example, a volume flow regulator is known with a flap that extends into a duct section and can be rotated by means of a pivot shaft with a lever arm, with a spring force generated by a spring system of a flap return mechanism acting on the lever arm. The spring system consists of a leaf spring or a leaf spring package, one end of which is fixed in place but can rotate, and the other end of which transmits a spring force to the flap. A force generating device is also provided for generating a force that acts only at one point on the leaf spring to bend the leaf spring between its two ends, as well as a fixing device for fixing the bending of the leaf spring.

Furthermore, the EP 1 840 477 B1 A control flap for a volume flow controller is known in which a corresponding adjustable spring is connected to the flap blade via a connecting element.

The EP 2 993 422 B1 describes a volume flow controller in which the damper blade is coupled to a spiral spring, so that the movement of the damper blade causes a movement of the spiral spring. Furthermore, an adjustment element is provided which forms a stop for the spiral spring. This adjustment element is a cantilever which is adjustably held at one end and the other end of which has the shape of a blade which forms the stop for the spiral spring and slides along the spiral spring as it continues to move.

Object of the invention

The object of the present invention is to provide a very simple but effective adjustment device for a damper blade in a volume flow controller.

Solution to the task

To solve the problem, the features of claim 1

The volume flow controller according to the invention has a channel and a control flap, the control flap being arranged in the channel so as to be pivotable about a transverse axis, the transverse axis being held in place by a spring. It is essential that the channel has a counter bearing housing at one end by means of a counter bearing cover and a spring bearing housing at the other end by means of a spring bearing cover, a spring force control mechanism being arranged in the spring bearing housing, the transverse axis forming a pressure lever which is arranged by means of a force transmitter pin so as to be in contact with a leaf spring of the spring force control mechanism, the spring force control mechanism being arranged in the spring bearing housing so as to be manually adjustable.

The advantage here is that the spring force control mechanism can be manually adjusted using the pressure lever in such a way that the position of the force transmitter pin can be adjusted along the leaf spring using the spring force control mechanism. The fact that the leaf spring has a shape that tapers away from a holding area means that the spring force is stronger the closer the force transmitter pin is to the holding area of the leaf spring. If the force transmitter pin is placed further away from the holding area, the spring force is correspondingly weaker. Accordingly, the incoming medium at the control flap must also pass a stronger or weaker hurdle.

If the spring force transmitted by the force transmitter pin via the leaf spring is particularly high, the control flap is positioned in such a way that it essentially clears the cross-section of the channel. Conversely, this means that the medium flowing through the channel is not affected. If the spring force is set to be weaker, the cross-section of the channel is essentially covered by the control flap, whereby the medium flowing through only has to overcome a weaker spring force.

In order to achieve the force transmission from the leaf spring to the transverse axis of the control flap, the pressure lever is designed radially to the transverse axis and the pressure lever in turn forms the force transmitter pin axially offset to the transverse axis. This creates a crank shape at one end of the transverse axis, which can be functionally one-piece or multi-part. via a rod into the transverse axis of the control flap. This makes it easier to design the spring force by means of the necessary adjustment paths in the spring bearing housing.

The spring force control mechanism consists primarily of a hold-down device and a base body, with the leaf spring in the initial position being parallel to almost parallel to the hold-down device and arranged between the hold-down device and the base body. In this context, in the initial position means before the spring force control mechanism is installed in the spring bearing housing.

The force transmitter pin is in the position of use, i.e. after the spring force control mechanism has been installed in the spring bearing housing, between the leaf spring and the hold-down device. In this context, position-adjustable means that the force transmitter pin can be adjusted along the leaf spring between the leaf spring and the hold-down device towards a holding area of the leaf spring or away from the holding area of the leaf spring, whereby the position of the control flap in the channel is pre-held with the spring force previously determined for this purpose.

The base body has an adjusting lever on the one hand and a channel groove spring on the other, whereby the adjusting lever engages through a part-circular recess in the spring bearing cover and the channel groove spring engages in a part-circular channel groove on an outside of the channel in the spring bearing housing. The base body thus ensures that the spring force control mechanism is positioned by means of the adjusting lever, which in turn enables the control flap to be adjusted with a preset spring force depending on the position relative to the channel.

For this purpose, the base body also forms a spring stop arch on its front surface facing the leaf spring. The spring stop arch is designed in such a way that when the force transmitter pin is applied, it lies close to the holding area of the leaf spring or almost lies against the leaf spring. This is due to the fact that when the leaf spring is applied at this point, the force transmitter pin does not give way or only gives way slightly and therefore only needs to be supported to a small extent in order to prevent the leaf spring from breaking or overstretching. The situation is different if the force transmitter pin is applied as far away from the holding area of the leaf spring as possible and the leaf spring only offers a small spring force. The spring stop arch, which slopes downwards in the initial position, supports the leaf spring to give way more when the spring force is low and at the same time prevents the leaf spring from overstretching or breaking in this position.

The base body also forms a tapered ratchet arm, whereby the ratchet arm interacts with a catch on the inside of the spring bearing cover. This is done by means of a catch elevation that extends away from the base body on the ratchet arm parallel to the adjuster lever. This facilitates better and simpler adjustment of the spring force control mechanism.

At the other end, the channel forms a counter bearing housing by means of a counter bearing cover. In the counter bearing housing, at the other end of the transverse axis, there is a gear which is connected to the transverse axis in a rotationally fixed manner. Rotationally fixed means that every pivoting movement of the transverse axis acts directly on the gear and also triggers a rotational movement of the gear.

The gear in turn engages a second gear in the counter bearing housing, whereby the second gear is mounted on a rotary damper. The rotary damper in turn is connected to the outer surface of the channel in the area of the counter bearing housing and allows the second gear to rotate freely and also prevents any rattling noises when adjusting the control flap or when the medium in the channel hits the control flap.

The gear or the second gear can be released or locked by turning using a locking lever, whereby the locking lever engages through a cutout in the counter bearing cover. Locking is achieved by a catch on the locking lever engaging in the gear or the second gear. The release or locking is possible using the part of the locking lever that protrudes from the counter bearing cover.

The control flap has a bend in the direction of flow. This has the advantage that a better response to the medium flowing through is achieved and even the smallest differences in the flowing volume are absorbed and thus adjusted to the desired shape.

Contrary to the prior art, the present invention therefore only consists of a pressure element coupled to the control flap, which presses on a spring. It is preferred that the lever is connected to the control flap via a simple rod, so that the movement of the control flap is directly transmitted to the spring. In the preferred embodiment, In this case, the rod connection with the control flap is made from the outside, whereby a pin on the rod is pushed through the duct housing into a sleeve in the transverse axis of the control flap.

To fix the spring at one end of the spring, an adjustment block is preferably provided which can either be rotated about an axis or displaced along the housing of the volume flow controller to adjust the tension of the spring, so that a distance from the adjustment block to the lever increases or decreases.

This adjustment block preferably has a curve which, together with a hold-down device, forms a gap which accommodates the end of the spring to be fixed. If the adjustment block is rotated, the spring can adapt to the curve of the adjustment block and thus change the tension for the lever and for the rotation of the control flap.

In a preferred embodiment, the adjustment block is formed integrally with the hold-down device.

Furthermore, in one embodiment of the invention, a damping element is assigned to the control flap. For example, this damping element can be a separate airbag or the like.

Character description

• 1 eine Schrägansicht von schräg oben auf einen erfindungsgemässen Volumenstromregler;
• 2 eine Explosionsdarstellung der 1;
• 3 eine Ansicht auf eine Blattfeder 9;
• 4 eine teilweise durchsichtige Darstellung einer Seitenansicht der 1;
• 5 eine geöffnete Seitenansicht eines Gegenlagergehäuses;
• 6 eine vergrösserte Seitenansicht des Federlagergehäuses;
• 7 eine geöffnete Seitenansicht des Federlagergehäuses aus 6;
• 8 eine Innenansicht eines Federlagerdeckels 6;
• 9 eine erste Seitenansicht einer Federkraft-Regelungsmechanik 7;
• 10 eine zweite Seitenansicht der Federkraft-Regelungsmechanik 7;
• 11 eine Explosionsdarstellung der erfindungsgemässen Vorrichtung zum Regeln des Volumens eines strömenden Mediums;
• 12 eine perspektivische Ansicht von Teilen einer Regeleinheit für die Vorrichtung gemäss 1;
• 13 eine Draufsicht auf Teile eines weiteren Ausführungsbeispiels einer Regeleinheit für die Vorrichtung gemäss 1.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings, which show in:

• 1 an oblique view from above of a volume flow controller according to the invention;
• 2 an exploded view of the 1 ;
• 3 a view of a leaf spring 9;
• 4 a partially transparent representation of a side view of the 1 ;
• 5 an opened side view of a counter bearing housing;
• 6 an enlarged side view of the spring bearing housing;
• 7 an opened side view of the spring bearing housing 6 ;
• 8th an interior view of a spring bearing cover 6;
• 9 a first side view of a spring force control mechanism 7;
• 10 a second side view of the spring force control mechanism 7;
• 11 an exploded view of the device according to the invention for regulating the volume of a flowing medium;
• 12 a perspective view of parts of a control unit for the device according to 1 ;
• 13 a plan view of parts of another embodiment of a control unit for the device according to 1 .

Example

In the 1 and 2 a volume flow controller with a channel 1 and a control flap 2 is shown, with the control flap 2 in the 2 can be seen better. In the channel 1, the control flap 2 is arranged so as to be pivotable about a transverse axis 3, the transverse axis 3 being held in place by a leaf spring 9. The channel 1 has, on the one hand, a spring bearing housing which is formed by means of a spring bearing cover 5 and the outer surface of the channel 1.

A spring force control mechanism 7 is arranged in the spring bearing housing, wherein the transverse axis 3 forms a pressure lever 6 which is arranged by means of a force transmitter pin 8 on the leaf spring 9 of the spring force control mechanism 7, wherein the spring force control mechanism 7 is arranged in the spring bearing housing in a manually adjustable manner.

In 1 the spring bearing cover 5 is shown on one outside of the channel 1 and the counter bearing cover 4 is shown on the opposite outside of the channel 1. The channel 1 forms a counter bearing housing by means of the counter bearing cover 4. A partially circular recess 19 is let into the spring bearing cover 5, through which an adjusting lever 12 extends. The adjusting lever 12 is shown as part of the spring force control mechanism 7, which is also partially visible.

In 2 It can also be seen that the counter bearing cover 4 has a cutout 23. In the assembled position, a part of a locking lever 27 extends through so that a user can actuate the locking lever 27.

Further in 2 shown that the counter bearing housing 5 has a gear 16 at the other end of the channel 1 and the transverse axis 3, which is connected in a rotationally fixed manner to the transverse axis 3.

The gear 16 engages in the assembled position with a second gear 17. The second Gear 17 is mounted on a rotary damper 18.

The gear 16 or the second gear 17 can be released or locked by rotation by means of the locking lever 27, wherein the locking lever 27 engages through the cutout 23 of the counter bearing cover 4.

The force transmitter pin 8 is positionally adjustable along the leaf spring 9 by the spring force control mechanism 7.

In 2 It is also shown that the transverse axis 3 forms the pressure lever 6 radially to the transverse axis 3 at one end and the pressure lever 6 forms the force transmitter pin 8 axially offset from the transverse axis 3.

The control flap 2 has a kink 22 next to the transverse axis 3.

The spring bearing cover 5 has a partially circular recess 19. In addition, a passage 29 is shown in the area of the spring bearing housing in the outer wall of the channel 1, through which the transverse axis 3 runs and merges into the pressure lever 6 running radially to the transverse axis 3, which in turn forms the force transmitter pin 8 at the other end of the transverse axis 3.

Furthermore, a part-circular channel groove 20 is recessed into the outer wall of the channel 1.

Also shown is the spring force control mechanism 7, which consists of a hold-down device 10 and a base body 11, wherein the leaf spring 9 is arranged in the initial position parallel to almost parallel to the hold-down device 10 and between the hold-down device 10 and the base body 11. The details of the spring force control mechanism 7 are shown in the 6 to 10 shown.

In 3 an enlarged view of the leaf spring 9 is shown. The leaf spring 9 forms a holding area 28 at the end. The leaf spring 9 has a shape that tapers away from the holding area 28. In the embodiment shown here, this is a trapezoidal shape.

4 shows a partially transparent representation of a side view of the 1 . The arrangement of the transverse axis 3, as well as the control flap 2 and its bend 22 are clearly shown there. The locking lever 18 is also shown in the locked state. To do this, the locking lever 18 engages with the gear 16 and therefore blocks the transverse axis 3 and thus the pivotability of the control flap 2. It is also clearly visible how the gear 16 engages with the second gear 17, which in turn is arranged on the rotary damper 27. 15. The control flap 2 has the bend 22 in the direction of flow. In the direction of flow means that the bend 22 is in the direction of the target direction of the flow of the medium that passes through the channel 1.

In 5 is an enlarged open side view of a counter bearing housing. The 4 The statements made also apply to the 5 . In particular, when the same features are provided with the same reference numbers.

In 6 is an enlarged side view of the spring bearing housing. The spring bearing cover 5 with the part-circular recess 19 is shown there.

On the outside, i.e. the side of the spring bearing cover 5 facing away from the channel 1, there is a grid display 24 along the partially circular recess 19. In the installed position, it can also be seen how the adjusting lever 12 reaches through the partially circular recess 19 and is thus accessible to a user for adjustment. A part of the base body 11 is also visible through the partially circular recess 19 in the spring bearing housing.

In 7 is an opened side view of the spring bearing housing from 6 shown. There the spring bearing cover 5 is made of 6 removed. There, the spring force control mechanism 7 is arranged in the spring bearing housing, whereby the base body 11 has on the one hand the adjusting lever 12 and on the other hand a channel groove spring 13, whereby the adjusting lever 12 engages through the part-circular recess 19 of the spring bearing cover 6, as in 6 shown, and the channel groove spring 13 simultaneously engages in the part-circular channel groove 20 on the outside of the channel 1 in the area of the spring bearing housing.

Furthermore, the force transmitter pin 8 is arranged between the leaf spring 9 and the hold-down device 10.

It is also clearly visible that the base body 11 forms a ratchet arm 14, whereby the ratchet arm 14 interacts with a detent 15 on an inner side of the spring bearing cover 6. The ratchet arm 14 forms a ratchet elevation 25 parallel to the adjusting lever 12. Interaction means that when the spring force control mechanism 7 is adjusted by means of the adjusting lever 12, the channel groove spring 13 is displaced in the part-circular channel groove 20, whereby the force transmitter pin 8 is simultaneously displaced along the leaf spring 9 towards a spring receptacle 26 or away from the spring receptacle 26, which also simultaneously applies the force to be applied. The spring force of the leaf spring 9 and the corresponding position of the control flap 2 are adjusted.

In 8th the inner surface of the spring cover 5 is shown. The inner surface is the surface which, in the assembled state, points towards the channel 1. There, the detent 15 running parallel to the part-circular recess 19 is provided.

In the 9 and 10 enlarged views of the spring force control mechanism 7 are shown again. The features already described in the previous figures are not repeated. In particular, if the same features have identical reference symbols, the statements also apply to the 9 and 10 .

In addition to the features already described in the previous figures, it is pointed out again here that the base body 11 forms a spring stop arch 21 on its front surface facing the leaf spring 9. It is also particularly pointed out that the locking arm 14 in 9 has a taper to enable grid adjustment.

A device according to the invention for regulating the volume of a flowing medium has a channel 31 in which the flowing medium is guided. To regulate the volume of the flowing medium, a control flap 32 is located in the channel, which is arranged to rotate about a transverse axis 33. At least one end of the transverse axis 33 is designed as a sleeve 34.

A bolt 35 can be inserted into the sleeve 34 and is connected to a lever 37 via a sword 36.

In 2 it can be seen that this lever 37 presses on a spring 38 which is inserted into a gap 39 of an adjustment block 40. The spring 38 is gripped by a hold-down device 41 so that the lever 37 is guided between the hold-down device 41 and the spring 38. However, this is only one of many possibilities. A snap connection of the spring 38 to the adjustment block 40 is also preferred.

Below the spring 38, the adjustment block 40 has a curve 42 which can be rolled off the spring 38, thereby changing the tension of the spring 38.

The adjustment block 40 can be rotated about an axis 43, so that a preload of the spring 38 relative to the lever 37 can be determined in this way. A scale can also be assigned to this position of the adjustment block 40.

In 3 another possibility for the adjustment block 40 is shown, whereby the adjustment block 40.1 is guided with two spaced bolts 43.1 and 43.2 in two guides 44.1 and 44.2 of a housing plate 45. The tension of the spring 38 is determined by the distance of the bolt 43.1 from the lever 37. It is of course also within the scope of the invention that, for example, the guide 44.1 is curved and is located in the housing plate 45, while the other guide 44.2 has a straight shape and is located in the adjustment block 40.1. Of course, other designs are also conceivable here.

List of reference symbols

1

channel

2

Control flap

3

Transverse axis

4

Counter bearing cover

5

Spring bearing cover

6

Pressure lever

7

Spring force control mechanism

8th

Force transmitter pin

9

Leaf spring

10

Hold-down clamp

11

Base body

12

Adjuster lever

13

Channel groove spring

14

Raster arm

15

Detent

16

gear

17

Second gear

18

Locking lever

19

Partially circular recess

20

Channel groove

21

Spring stop arch

22

kink

23

Excerpt

24

Grid display

25

Grid elevation

26

Spring mount

27

Rotary damper

28

Holding area

29

penetration

30 31

channel

32

Control flap

33

Que axis

34

Sleeve

35

bolt

36

sword

37

lever

38

Feather

39

gap

40

Adjustment block

41

Hold-down clamp

42

Rounding

43

axis

44

Scenery

45

Housing plate

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was 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 accepts no liability for any errors or omissions.

Cited patent literature

• DE 10014901 C2 [0003]
• EP 1840477 B1 [0004]
• EP 2993422 B1 [0005]

Claims (15)

Volume flow controller with a channel (1) and a control flap (2), the control flap (2) being arranged in the channel (1) so as to be pivotable about a transverse axis (3), the transverse axis (3) being held in place by a spring, characterized in that the channel (1) has, on the one hand, a spring bearing housing by means of a spring bearing cover (5), a spring force control mechanism (7) being arranged in the spring bearing housing, the transverse axis (3) forming a pressure lever (6) which is arranged so as to bear against a leaf spring (9) of the spring force control mechanism (7) by means of a force transmitter pin (8), the spring force control mechanism (7) being arranged so as to be manually adjustable in the spring bearing housing. Volume flow controller according to Claim 1 , characterized in that the force transmitter pin (8) is positionally adjustable along the leaf spring (9) by the spring force control mechanism (7). Volume flow controller according to Claim 1 or 2 , characterized in that the leaf spring (9) has a shape tapering away from a holding region (28). Volume flow controller according to one of the Claims 1 until 3 , characterized in that the transverse axis (3) forms the pressure lever (6) radially to the transverse axis (3) at one end and the pressure lever (6) forms the force transmitter pin (8) axially offset to the transverse axis (3). Volume flow controller according to one of the Claims 1 until 4 , characterized in that the spring force control mechanism (7) consists of a hold-down device (10) and a base body (11), wherein the leaf spring (9) in the initial position is arranged parallel to almost parallel to the hold-down device (10) and between the hold-down device (10) and the base body (11). Volume flow controller according to Claim 5 , characterized in that the force transmitter pin (8) is arranged between the leaf spring (9) and the hold-down device (10). Volume flow controller according to Claim 5 or 6 , characterized in that the base body (11) has on the one hand an adjusting lever (12) and on the other hand a channel groove spring (13), wherein the adjusting lever (12) engages through a part-circular recess (19) of the spring bearing cover (6) and the channel groove spring (13) engages in a part-circular channel groove (20) on an outer side of the channel (1) in the spring bearing housing. Volume flow controller according to one of the Claims 5 until 7 , characterized in that the base body (11) forms a spring stop arch (21) on its end face facing the leaf spring (9). Volume flow controller according to one of the Claims 5 until 8th , characterized in that the base body (11) on the one hand forms a locking arm (14), wherein the locking arm (14) cooperates with a locking mechanism (15) on an inner side of the spring bearing cover (6). Volume flow controller according to Claim 9 , characterized in that the locking arm (14) forms a locking elevation (25) parallel to the adjusting lever (12). Volume flow regulator according to one of the preceding claims, characterized in that the channel (1) forms a counter bearing housing at the other end by means of a counter bearing cover (4). Volume flow controller according to Claim 11 , characterized in that the counter bearing housing (5) has at the other end a gear (16) which is connected in a rotationally fixed manner to the transverse axis (3). Volume flow controller according to Claim 12 , characterized in that the gear (16) engages with a second gear (17), wherein the second gear (17) is mounted on a rotary damper (18). Volume flow controller according to Claim 13 , characterized in that the gear wheel (16) or the second gear wheel (17) can be released or rotationally locked by means of a locking lever (27), wherein the locking lever (27) engages through a cutout (23) of the counter bearing cover (4). Volume flow controller according to one of the preceding claims, characterized in that the control flap (2) has a bend (22) in the flow direction.

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