Viscosity-sensitive throttling device and liquid line comprising the throttling device

Abstract

The invention relates to a throttle device (120) for a liquid line (115), wherein the throttle device has at least one liquid channel (203) for a liquid flowing through the throttle device, which extends along a longitudinal axis (221) of the throttle device (120). The liquid channel (203) has at least one channel wall (233) which has a course curved along the longitudinal axis (221).

Description

Technical Field

[0001] The present invention relates to a throttling device for liquid lines (especially for liquid lines in liquid circuits). Background Technology

[0002] A vehicle may have one or more fluid circuits, for example, to supply a specific fluid, particularly oil, to vehicle components (such as a transmission). Here, the fluid circuit may have a fluid supply or fluid flow component and a cooling unit for cooling the fluid.

[0003] The temperature of the liquid in a liquid circuit can vary depending on the operating conditions of the components being circulated and / or under different ambient temperatures. As a result, the viscosity of the liquid within the liquid circuit may also change.

[0004] The components of a liquid circuit that supply liquid flow may have defined flow requirements regarding the volumetric flow rate of the liquid through the component and / or regarding the pressure gradient or pressure loss of the liquid as it flows through the component. These flow requirements may differ for different temperatures and / or different viscosity values ​​of the liquid. Summary of the Invention

[0005] This article relates to the technical task of efficiently and accurately meeting the requirements of liquid flow components regarding liquid pressure loss in components with different viscosity values.

[0006] Therefore, the present invention proposes a throttling device for liquid pipelines, wherein,

[0007] - The throttling device has at least one liquid channel for liquid flowing through the throttling device, the liquid channel extending along the longitudinal axis of the throttling device; and

[0008] - The liquid channel has at least one channel wall, the channel wall having a curved orientation along the longitudinal axis.

[0009] - The throttling device has a partition wall extending along the longitudinal axis, which divides the throttling device into a first sub-region and a second sub-region;

[0010] - The throttling device has at least one liquid channel in the first sub-region and in the second sub-region, respectively.

[0011] The present invention also proposes a liquid pipeline with a hollow profile, wherein the throttling device according to the present invention is arranged in the hollow profile.

[0012] According to one aspect, a throttling device for a fluid line is described. The throttling device can be configured as a passive and / or flow-dependent object that can be introduced into a hollow profile of the fluid line. In this case, the cross-section of the throttling device can be adapted to the hollow profile, such that the throttling device is held in a specific position within the fluid line by means of press fit and / or by static friction. In particular, the throttling device can be configured such that when the throttling device is arranged in the fluid line, one or more walls (also referred to as ribs) of the throttling device contact the inner wall of the fluid line (and thus form a frictional lock between the throttling device and the fluid line). The fluid line can be part of a component of a fluid circuit (e.g., part of a vehicle's transmission). The throttling device can be configured to allow oil (as a fluid) to flow through it.

[0013] The throttling device can have an elongated shape. In particular, the throttling device can have a length along its longitudinal axis, which is especially greater than the diameter of the cross-section of the throttling device transverse to the longitudinal axis by a factor of 2 or greater, or by a factor of 4 or greater. The length of the throttling device along its longitudinal axis can be, for example, 50 mm or greater, for example, between 50 mm and 100 mm.

[0014] The throttling device includes at least one liquid channel for a liquid (e.g., oil) to flow through it, the liquid channel extending along the longitudinal axis of the throttling device. The liquid channel may be configured such that the liquid (especially oil) flows through it along the longitudinal axis. The liquid channel may, for example, have a cross-section (perpendicular to the longitudinal axis) having a diameter or edge length between 1 mm and 3 mm.

[0015] The liquid passage may include at least one passage wall (or passage rib) extending along a longitudinal axis from a first end (inlet) of the throttling device to a second end (outlet). Typically, the liquid passage is defined by at least two passage walls. Furthermore, the throttling device may be configured, particularly as a hollow profile adapted to a liquid line, such that when the throttling device is located in the liquid line, the inner wall of the liquid line forms another wall of the liquid passage.

[0016] At least one channel wall of the at least one liquid channel has a curved orientation along the longitudinal axis (which changes the flow direction of the liquid within the liquid channel along the longitudinal axis). In particular, at least one channel wall does not have a straight orientation that extends continuously from the first end of the throttling device parallel to the longitudinal axis to the second end. Here, the at least one channel wall may have a curved orientation such that the effective length of the channel wall along which the liquid flows through the liquid channel is guided is at least 5% or 10% greater than the length of a channel wall with a straight orientation along the longitudinal axis.

[0017] The channel wall, which curves along the longitudinal axis, can have a corrugated orientation around a wall axis arranged parallel to the longitudinal axis. Here, the channel wall can, for example, have a corrugated orientation around the wall axis, resembling a sinusoidal, triangular, or rectangular signal. Furthermore, the channel wall can alternately move towards and away from the center of the liquid channel.

[0018] A channel wall (or channel rib) with a curvature along its longitudinal axis can be constructed such that the channel wall has a straight orientation along a height axis perpendicular to the wall axis or the longitudinal axis.

[0019] Therefore, a throttling device is described having at least one liquid passage defined by at least one channel wall having a curved orientation along the longitudinal axis of the throttling device. By providing one or more liquid passages each having at least one curved channel wall, the requirements for pressure loss of the liquid within the liquid conduit can be set precisely and in a structurally efficient manner, especially for different viscosity values ​​of the dynamic viscosity of the liquid flowing through the liquid conduit.

[0020] The length of the throttling device, particularly the (effective) length of the at least one channel wall along the longitudinal axis and / or the curvature of the at least one channel wall, can be configured such that the liquid flowing through the throttling device has a pre-given rated pressure loss when flowing through the throttling device for at least two different viscosity values. In particular, the at least one liquid channel of the throttling device can be configured such that the pressure loss of the liquid flowing through the liquid channel is increased by the curvature of the at least one channel wall compared to a liquid channel with a straight channel wall. Here, the increase in pressure loss is particularly significant for liquids with a viscosity of 10... -4 m 2 Liquids with a dynamic viscosity of / s or greater can be 1 bar or greater. Therefore, the flow requirements of components in liquid circuits can be met in a particularly efficient and precise manner.

[0021] As explained above, the at least one liquid passage of the throttling device can be defined by at least two channel walls. Here, at least one of the at least two channel walls has a curvature along the longitudinal axis. In one example, each of the at least two channel walls has a curvature along the longitudinal axis. Here, the at least two channel walls can have complementary curvatures such that the net cross-section of the liquid passage fluctuates along the longitudinal axis by a maximum of 20%, particularly a maximum of 10%. In other words, the channel walls of the liquid passage can have a curvature such that the cross-section of the liquid passage through which the liquid flows remains substantially constant along the longitudinal axis of the throttling device. Therefore, it is possible to reliably avoid impairing the volumetric flow rate of the liquid passing through the throttling device.

[0022] Alternatively or additionally, the throttling device may be configured, in particular, by a corresponding construction of the one or more liquid channels and / or the walls of the one or more channels, such that the net cross-section of the throttling device (total or generally) fluctuates along the longitudinal axis by a maximum of 20%, particularly a maximum of 10%. In other words, the throttling device may be configured such that the cross-section of the one or more liquid channels through which the liquid flows (generally) remains substantially constant along the longitudinal axis (total) of the throttling device. Thus, it is possible to reliably avoid impairing the volumetric flow rate of the liquid passing through the throttling device.

[0023] Two directly adjacent liquid channels may share a common channel wall that separates them from each other. The channel wall between the two liquid channels may have a curvature along the longitudinal axis. Therefore, the two liquid channels can share a common channel wall with a curvature along the longitudinal axis.

[0024] As described above, the throttling device can have multiple liquid channels, at least one of which is defined by at least one channel wall having a curvature along the longitudinal axis. By providing multiple liquid channels, each having a channel wall with a different (curved) curvature along the longitudinal axis, the flow requirements of the components of the liquid circuit can be met in a particularly efficient and precise manner.

[0025] The channel wall with a curved orientation can have different straight sections that alternately follow the longitudinal axis and are spaced at different distances from it. Each straight section can extend parallel to the longitudinal axis or parallel to the wall axis. Between directly adjacent straight sections, transition sections extending obliquely about the longitudinal axis can be arranged. The straight sections can be alternately arranged on one side and the opposite side of the wall axis.

[0026] Alternatively or additionally, a channel wall with a curved orientation may have a sinusoidal or wavy orientation along the longitudinal axis (around the wall axis).

[0027] In particular, the channel wall with a curved orientation can be configured to repeatedly, especially periodically, change the flow direction of the liquid in the liquid channel along the longitudinal axis (especially such that the flow direction is at least partially not parallel to the longitudinal axis of the throttling device). In particular, the channel wall can achieve a flow direction of the liquid that fluctuates back and forth about the longitudinal axis.

[0028] The channel wall structure in this way can improve the friction of the liquid on the channel wall in a highly efficient and reliable manner, so as to meet the flow requirements of the components of the liquid circuit.

[0029] The throttling device may have a (planar) partition wall extending along the longitudinal axis, which divides the throttling device into a first sub-region and a second sub-region. The individual channel walls may, if necessary, be arranged perpendicular to the partition wall. In particular, the individual channel walls may be vertically fixed to or connected to the partition wall.

[0030] The throttling device may have at least one liquid passage in both a first sub-region and a second sub-region. Here, the separating wall may form the wall of the liquid passage in the first sub-region and the wall of the liquid passage in the second sub-region, respectively. The separating wall may be configured to contact the inner wall of the liquid conduit on which the throttling device is to be arranged.

[0031] Therefore, the liquid passage can be (if necessary) entirely defined by two passage walls, by a partition wall, and by the inner wall of the liquid conduit.

[0032] The throttling device can be constructed symmetrically. In particular, the separating wall can form one or the plane of symmetry of the throttling device. Therefore, the first and second sub-regions of the throttling device can be constructed identically and / or correspondingly to each other.

[0033] By providing a (planar) partition wall on which the various liquid channels of the throttling device are arranged, the throttling device can be manufactured in a particularly efficient manner. Preferably, the throttling device can be configured such that it can be manufactured (entirely) in an open-close injection mold.

[0034] According to another aspect, a liquid pipeline having a hollow profile is described, in which at least one throttling device constructed as described herein is arranged.

[0035] According to another aspect, a liquid circuit and / or vehicle component is described having a throttling device constructed as described herein.

[0036] According to another aspect, a (road) motor vehicle (especially a car, truck, bus, or motorcycle) is described, which includes the throttling device or fluid line described herein.

[0037] According to another aspect, the use of the throttling device described herein in liquid lines and / or liquid circuits is described. Here, the throttling device can be used to meet one or more requirements regarding pressure loss when the liquid flows through a liquid line in which the throttling device is arranged, for one or more different viscosity values ​​of the liquid. In particular, the throttling device can be used (as described herein) to increase the pressure loss of the liquid flowing through the liquid line, such as when the viscosity value of the liquid is relatively high.

[0038] It should be noted that the methods, apparatus, and systems described herein can be used not only individually but also in combination with other methods, apparatus, and systems described herein. Furthermore, any aspect of the methods, apparatus, and systems described herein can be combined with each other in diverse ways. In particular, the features of the claims can be combined with each other in diverse ways. Attached Figure Description

[0039] Furthermore, the invention will be described in detail with reference to embodiments. In the accompanying drawings:

[0040] Figure 1a An exemplary vehicle with a liquid circuit is shown;

[0041] Figure 1b An exemplary throttling device is shown in a liquid pipeline;

[0042] Figures 2a to 2d Different views of a viscosity-sensitive throttling device are shown; and

[0043] Figure 3 Exemplary requirements for the component are shown. Detailed Implementation

[0044] As mentioned at the beginning, this paper investigates how to efficiently and precisely adapt the flow characteristics of a liquid circuit to the viscosity of the liquid flowing through it. In this regard, Figure 1 illustrates an exemplary vehicle 100 with a liquid circuit 110. The liquid circuit 110 includes, for example, a component 111 supplied with a specific liquid (especially oil), such as a transmission. Furthermore, the liquid circuit 110 may include a thermostat 112 designed to determine the temperature of the liquid in the liquid circuit 110. The liquid circuit 110 may also include a temperature control module 113 designed to regulate the temperature of the liquid, especially cooling it, according to the determined temperature. The various modules 111, 112, and 114 of the liquid circuit 110 may be interconnected via a liquid line 115.

[0045] In the liquid circuit 110, as in Figure 1b As shown, one or more throttling devices 120 can be used to adjust the flow characteristics of the liquid within the liquid circuit 110. In particular, the throttling device 120 can be arranged in at least one liquid line 115, through which the volumetric flow rate of the liquid in the liquid line 115 can be throttled and / or the pressure loss of the liquid flowing through the liquid line 115 can be adjusted. Here, the throttling device 120 can have a constant throttling cross-section along its entire length.

[0046] As mentioned at the beginning, the viscosity of the liquid in fluid line 115 typically depends on the temperature of the liquid. This is especially true in the case of (engine or transmission) oil. As the temperature decreases, the viscosity of the liquid typically increases. As the liquid viscosity increases, the pressure loss or pressure gradient of the liquid in fluid line 115 typically increases at a given volumetric flow rate through fluid line 115.

[0047] The component 111 to which the liquid is supplied may have specific flow requirements for the liquid. These flow requirements may depend on the temperature or viscosity of the liquid. Exemplary flow requirements are the volumetric flow rate of the liquid at a specific volumetric flow rate and / or the pressure loss of the liquid. In particular, flow requirements may be specific to the dynamic viscosity of the liquid (in St, cSt, or m). 2 / s is a pre-defined specific rating for the pressure loss of the liquid (given in bars). Here, if necessary, specific ratings for the pressure loss can be pre-defined separately for several different dynamic viscosities.

[0048] The pressure loss of the liquid caused by the throttling device 120 typically depends on the net passage or cross-section of the throttling device 120 and the length of the wall through which the liquid flows (in the direction of liquid flow). Changing the net passage or cross-section of the throttling device 120 also affects the achievable volumetric flow rate of the liquid, thus it is typically advantageous to keep the net passage or cross-section of the throttling device 120 (especially along the length of the throttling device 120) constant or unchanged. The throttling device 120 described herein preferably has a net passage or cross-section that remains constant or unchanged (especially along the length of the throttling device 120) (or fluctuates by less than 10% along the length of the throttling device 120).

[0049] The degree of wall friction on the fluid can be altered by varying the effective length of the wall of the throttling device 120. Here, the degree of wall friction increases with increasing effective length of the wall of the throttling device 120. Furthermore, the degree of wall friction typically depends on the viscosity of the liquid. Specifically, the degree of wall friction on the liquid induced over a defined path segment of the wall of the throttling device 120 typically increases with increasing liquid viscosity. Therefore, by changing the effective length of the wall of the throttling device 120, the gradient of pressure loss of the liquid, which depends on the dynamic viscosity of the liquid, can be altered.

[0050] The flow requirements of component 111 can be such that the pressure loss of the liquid varies relatively significantly depending on the dynamic viscosity of the liquid. This can be achieved by using a relatively long throttling device 120 to provide a relatively long wall length. However, using a relatively long throttling device 120 results in relatively high structural space requirements for both the throttling device 120 and the liquid line 115.

[0051] exist Figures 2a to 2d The diagram shows a throttling device 120 having at least one liquid passage 203 with at least one curved channel wall 204. By providing a liquid passage 203 with at least one non-linearly extending channel wall 204, the effective wall length of the throttling device 120 can be increased without increasing the length of the throttling device 120 (along the longitudinal axis 221 of the throttling device 120). Figure 2a The throttling device 120 is shown in perspective. Figure 2b The diagram shows the end face of the throttling device 120 at the first end 201 (i.e. at the inlet) of the throttling device 120. Figure 2c The throttling device 120 is shown in a side view, wherein the wall 204 of the liquid passage 203 is arranged in or parallel to the image plane. Figure 2d The throttling device 120 is shown in the diagram from above, wherein the wall (or rib) 204 of the liquid passage 203 is arranged perpendicular to the plane of the diagram.

[0052] For example in Figure 2a As shown, a liquid channel 203 extends from a first end 201 to a second end 202 of the throttling device 120 along its longitudinal direction or longitudinal axis 221. Here, the liquid channel 203 is defined by at least two walls 204, each capable of having a curved (undulating) orientation. However, in order to achieve a cross-section, or net channel, that remains constant along the longitudinal direction of the throttling device 120, the two channel walls 204 have complementary and / or corresponding orientations. The throttling device 120 may include one or more liquid channels 203, each having a channel wall 204 with a curved orientation. Figures 2a to 2d In the example shown, the throttling device 120 has at least four liquid channels 203, each having a curved channel wall 204.

[0053] The curvature of the channel walls 204, 231, 232, and 233, especially, can be determined by... Figure 2d It was deduced. Figure 2d Three curved walls 231, 232, and 233 are shown, through which two liquid channels 203 extend along the longitudinal axis 221 of the throttling device 120. (As shown in...) Figure 2bAs shown, the throttling device 120 may include a (horizontal) partition wall 205 that divides the throttling device 120 into a first sub-region 211 (on a first side of the partition wall 205) and a second sub-region 212 (on a second opposite side of the partition wall 205). The two sub-regions 211, 212 may be mirror-symmetrical about each other with respect to the partition wall 205. Therefore, the (planar) partition wall 205 may be configured to divide the throttling device 120 along a longitudinal axis 221 into two identically constructed sub-regions 211, 212. In each sub-region 211, 212, one or more liquid channels 203 may be provided with curved channel walls 204, 231, 232, 233. The partition wall 205 may form the bottom of each liquid channel 203. The channel walls 204, 231, 232, 233 may be arranged perpendicular to the partition wall 205.

[0054] As in Figure 1b As shown, the throttling device 120 can be configured to be inserted into the liquid conduit 115 (especially into a pipe). Here, each channel wall 204 and / or partition wall 205 can be adapted to the contour of the liquid conduit 115. In particular, each channel wall 204 and / or partition wall 205 can be configured such that each channel wall 204 and / or partition wall 205 contacts the inner wall of the liquid conduit 115, such that each liquid passage 203 is defined by the inner wall (fluid-tightly) of the liquid conduit 115. Therefore, the liquid passage 203 can be defined by two channel walls 204, 231, 232, 233, by the partition wall 205, and by the inner wall (fluid-tightly) of the liquid conduit 115.

[0055] exist Figure 2d The channel walls 231, 232, and 233 shown have staggered wall sections 241 and 242 to achieve a curved orientation. The wall sections 241 and 242 may extend parallel to the longitudinal axis 221. Furthermore, the transition region between two adjacent wall sections 241 and 242 may extend obliquely to the longitudinal axis 221 (causing a change in the direction of liquid flow). In an alternative example, the channel walls 231, 232, and 233 may, for example, have a sinusoidal orientation along the longitudinal axis 221 of the throttling device 120.

[0056] Figure 3This illustrates an exemplary nominal correlation 300 between the pressure loss 302 and the volumetric flow rate 301 of a liquid (for a liquid with a specific viscosity). This nominal correlation 300 can be predetermined for different viscosities, or viscosity values, of the liquid. The length of the throttling device 120 along the longitudinal axis 221 can be determined to a certain value. Here, the length of the throttling device 120 can be determined, for example, such that when using a throttling device 120 having one or more liquid channels 203 each having straight-oriented channel walls 204, a predetermined nominal pressure loss 302 is achieved at a predetermined volumetric flow rate 301 (as predetermined by the nominal correlation 300 for relatively low viscosity).

[0057] In the second step, the orientation of the channel wall 204 can thus be adjusted such that the rated pressure loss 302 (for a specific volumetric flow 301) pre-given by the rated correlation 300 is achieved even when the viscosity of the liquid is relatively high. Therefore, a throttling device 120 having at least one liquid channel 203, having a curved orientation along the longitudinal axis 221, can be used efficiently to achieve the rated pressure loss 302 within the liquid line 115 or for component 111.

[0058] Therefore, a throttling device 120 is described, which enables viscosity-sensitive adjustment of the rated pressure loss 302 caused by the throttling device 120 without increasing the structural space required for the throttling device 120. The described throttling device 120 has at least one liquid channel 203 with at least one channel wall 204 having a curved orientation along the longitudinal axis 221 of the throttling device 120. In particular, the liquid channel 203 may have a cross-section or cross-sectional shape that varies (alternatingly) along the longitudinal axis 221 of the throttling device 120. Therefore, wall friction caused by the liquid wall 204 can be increased, which generally leads to an increased pressure loss of the liquid when passing through the throttling device 120. In particular, the surface area of ​​the at least one channel wall 204 of the throttling device 120 can be increased without (substantially) changing the net passage of the throttling device 120 and / or the individual liquid channels 203. Therefore, it is possible to achieve increased temperature sensitivity or viscosity sensitivity of the throttling device 120.

[0059] The measures described herein enable optimized utilization of existing structural space for the throttling device 120. Here, the throttling device 120 can continue to be manufactured efficiently (e.g., using an open / close mold). The throttling device 120 can be efficiently integrated into the existing liquid circuit 110. Furthermore, the channel wall 204 can be manufactured with a robust wall thickness.

[0060] The present invention is not limited to the embodiments shown herein. In particular, it should be noted that the specification and drawings are intended to illustrate the principles of the proposed methods, apparatus, and systems only by way of example.

Claims

1. A throttling device (120) for a liquid pipeline (115), wherein, - The throttling device (120) has at least one liquid passage (203) for liquid flowing through the throttling device (120), the liquid passage extending along the longitudinal axis (221) of the throttling device (120); and - The liquid channel (203) has at least one channel wall (204, 231, 232, 233) that has a curved orientation along the longitudinal axis (221). - The throttling device (120) has a partition wall (205) extending along the longitudinal axis (221), which divides the throttling device (120) into a first sub-region (211) and a second sub-region (212). - The throttling device (120) has at least one liquid channel (203) in the first sub-region (211) and in the second sub-region (212).

2. The throttling device (120) according to claim 1, wherein, The throttling device (120) has at least two channel walls (204, 231, 232, 233) defining the liquid channel (203), and at least one of the at least two channel walls (204, 231, 232, 233) has a curvature along the longitudinal axis (221).

3. The throttling device (120) according to claim 2, wherein, The at least two channel walls (204, 231, 232, 233) have complementary orientations, such that the net cross-section of the liquid channel (203) fluctuates by up to 20% along the longitudinal axis (221).

4. The throttling device (120) according to claim 2, wherein, The at least two channel walls (204, 231, 232, 233) have complementary orientations, such that the net cross-section of the liquid channel (203) fluctuates by up to 10% along the longitudinal axis (221).

5. The throttling device (120) according to any one of claims 1 to 4, wherein, The at least one channel wall (204, 231, 232, 233) has a curved orientation such that the effective length of the guided channel wall (204, 231, 232, 233) along which the liquid flows through the liquid channel (203) is at least 5% or 10% greater than the length of the channel wall (204, 231, 232, 233) having a straight orientation along the longitudinal axis (221).

6. The throttling device (120) according to any one of claims 1 to 4, wherein, - The throttling device (120) has a plurality of liquid channels (204, 231, 232, 233), at least one of the liquid channels (204, 231, 232, 233) is defined by at least one channel wall (204) having a direction of curvature along the longitudinal axis (221).

7. The throttling device (120) according to claim 6, wherein, The two directly adjacent liquid channels (204, 231, 232, 233) of the throttling device (120) have a common channel wall (204) that curves along the longitudinal axis (221).

8. The throttling device (120) according to any one of claims 1 to 4, wherein, The partition wall (205) forms the wall of the liquid channel (203) in the first sub-region (211) and the wall of the liquid channel (203) in the second sub-region (212), respectively.

9. The throttling device (120) according to claim 8, wherein, - The throttling device (120) is symmetrically constructed; and / or - The partition wall (205) forms the plane of symmetry of the throttling device (120); and / or - The first sub-region (211) and the second sub-region (212) are constructed identically and / or correspondingly to each other.

10. The throttling device (120) according to any one of claims 1 to 4, wherein, The at least one channel wall (204) - Different straight line segments (241, 242) are repeatedly alternated along the longitudinal axis (221) and spaced at different distances from the longitudinal axis (221); and / or - Having a sinusoidal or wavy orientation along the longitudinal axis (221); and / or - It is configured to repeatedly change the flow direction of the liquid in the liquid channel (203) along the longitudinal axis (221).

11. The throttling device (120) according to claim 10, wherein, The at least one channel wall (204) is configured to periodically change the flow direction of the liquid in the liquid channel (203) along the longitudinal axis (221).

12. The throttling device (120) according to any one of claims 1 to 4, wherein, The throttling device (120) is configured such that it can be manufactured in an open-close injection mold.

13. The throttling device (120) according to any one of claims 1 to 4, wherein, - The throttling device (120) has a length along the longitudinal axis (221); and / or - The throttling device (120) is configured such that liquid flows through it along the longitudinal axis (221).

14. The throttling device (120) according to claim 13, wherein, The length is greater than the diameter of the throttling device (120) transverse to the longitudinal axis (221) by a coefficient of 2 or greater.

15. The throttling device (120) according to claim 13, wherein, The length is greater than the diameter of the throttling device (120) transverse to the longitudinal axis (221) by a factor of 4 or greater.

16. The throttling device (120) according to claim 13, wherein, The liquid channel (203) is configured such that liquid flows through it along the longitudinal axis (221).

17. The throttling device (120) according to any one of claims 1 to 4, wherein, The throttling device (120) is configured along the length of the longitudinal axis and the curvature of the channel walls (204, 231, 232, 233) such that the liquid flowing through the throttling device (120) has a rated pressure loss (302) when flowing through the throttling device (120) for at least two different viscosity values.

18. The throttling device (120) according to any one of claims 1 to 4, wherein, The length of the channel walls (204, 231, 232, 233) along the longitudinal axis (221) and the curvature of the channel walls (204, 231, 232, 233) are configured such that the liquid flowing through the throttling device (120) has a rated pressure loss (302) when flowing through the throttling device (120) for at least two different viscosity values.

19. The throttling device (120) according to any one of claims 1 to 4, wherein, The liquid channel (203) is configured such that the pressure loss of liquid flowing through the liquid channel (203) is increased by the curved direction of the at least one channel wall (204, 231, 232, 233) compared to the straight direction of the liquid channel (203) having the channel walls (204, 231, 232, 233).

20. The throttling device (120) according to claim 19, wherein, for With 10 -4 m 2 Liquids with a dynamic viscosity of / s or greater have a pressure loss of 1 bar or greater.

21. The throttling device (120) according to any one of claims 1 to 4, wherein, The throttling device (120) is configured such that when the throttling device (120) is located in the liquid line (115), the inner wall of the liquid line (115) forms the wall of the liquid passage (203).

22. A liquid pipeline (115) having a hollow profile, wherein a throttling device (120) according to any one of claims 1 to 21 is arranged in the hollow profile.

23. The use of the throttling device (120) according to any one of claims 1 to 21 satisfies one or more requirements of the liquid line (115) in terms of pressure loss when the liquid flows through the liquid line (115) having the throttling device (120) for different viscosity values ​​of the liquid.

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