WO2018188889A1

WO2018188889A1 - Pressure-adjusting valve

Info

Publication number: WO2018188889A1
Application number: PCT/EP2018/056484
Authority: WO
Inventors: Ingo Balkowski; Peter Brüggemann; Roland Georg Grein; Bernd Leu
Original assignee: Siemens Aktiengesellschaft
Priority date: 2017-04-10
Filing date: 2018-03-15
Publication date: 2018-10-18
Also published as: DE102017206061A1

Abstract

The invention relates to a pressure-adjusting valve (1) comprising a housing (2) defining a fluid channel (3) with at least one inlet (4) and at least one outlet (5), a pressure-reduction body (6) arranged in the fluid channel (3) and defining a plurality of through-channels (7) that fluidically connect the inlet (4) to the outlet (5), and an adjusting body (11) which is positioned in the fluid channel (3) and which adjusts the flow through the through-channels (7) of the pressure-reduction body (6), said pressure-adjusting valve (1) comprising only one individual pressure-reduction body (6) embodied as a single piece. The invention is characterised in that the inlet openings of the through-channels (7) are positioned on the periphery of the pressure-reduction body (6) and the outlet openings of the through-channels (7) are positioned on the end face of the pressure-reduction body (6) or vice versa.

Description

pressure adjustment

The present invention relates to a pressure adjusting valve comprising a housing defining a fluid channel with at least ei ^¬ NEM inlet and at least one outlet, arranged in the fluid passage pressure reduction body which defines a plurality of passageways that connect the inlet fluidly with the outlet, and a NAL positioned in the Fluidka- adjusting means that adjusts the flow through the passage channels of the pressure-reducing body or re ^¬ gel.

Many power plant applications, it is necessary to relax the pressure of a fluid from a high pressure level to a cu ^¬ engined pressure level. Pressure ^{adjusting valves of the} type mentioned in the introduction with a plurality of pressure relief bodies are used for this purpose in the prior art, inter alia, in which a pressure reduction is achieved by the frictional effects associated with a multiple flow deflection. For example, the document CN

201547279 U a pressure adjusting valve of the type mentioned, which has a plurality of stacked, annular pressure-reducing body formed, which are surrounded by a pressure-bearing enveloping body. The pressure reduction bodies are each provided with passage channels and form a total of a substantially hollow cylindrical arrangement. The passage channels extend in a meandering manner within a radial plane from the inner circumference to the outer circumference of the respective pressure reduction bodies. However, a major disadvantage of such a disk pack combined pressure reduction body is that the individual pressure reduction body can move relative to each other in transient operating conditions by temperature and / or vibration forces, resulting in a relatively large wear. The Abdich ^¬ tion between the pressure reduction bodies with each other and between the pressure reduction bodies and the adjusting is very problematic, which is formed by a control piston, the extends through the central passage openings of the disc-shaped pressure reduction body. Yet another disadvantage of disc-shaped pressure relief bodies is that the length of the respective passageways is very limited due to the construction and can be substantially increased only by the outer diameter of the disc-shaped pressure reduction body is increased. However, this also increases the external dimensions of the pressure adjustment valve, which in many cases is not consistent with the available installation space. In addition, the enveloping body takes up additional space to complete.

Based on this prior art, it is an object of the present invention to provide a pressure adjusting valve of the type mentioned above with an alternative construction.

To achieve this object, the present invention provides a pressure adjusting valve of the type mentioned, which has only a single, integrally formed pressure reduction body. Such a one-piece design of the pressure-reducing ^¬ body can be prepared in particular using an additive manufacturing process, such as un ^¬ ter use of an SLM method (Selective Laser Melting). It is compared to a multi-part design to the effect that wear due to relatively zuei ^¬ nander moving items is not possible. In addition, the seal between the pressure reduction body on the one hand and the adjusting member on the other hand in a single, one-piece pressure reduction body designed as unproblematic. Furthermore, shape, size and Erstreckungsrich- are processing the through-channels as well as the shape of the pressure reduction ^¬ body itself freely selected within wide ranges, which leads to great flexibility in the design of the invention ^shown SEN pressure adjustment. Accordingly, the condensation may constructive tion very flexible and can be individually adapted to the respective Be ^¬ dürfnisse of each case. A further ^advantage is that, thanks to the one-piece design of the pressure-reducing body, the use of an enveloping body can be fully achieved. can be dispensed with constantly, whereby the number of components and the space requirement is reduced. According to the invention, the inlet openings of the through-channels are circumferentially positioned on the pressure-reducing body and the outlet openings of the through-channels are frontally positioned on the pressure-reducing body or vice versa, ie the inlet openings on the front side and the outlet openings on the circumferential side. This is to the advantage that obstacles that can hit the from the Druckabbaukör ^¬ per emerging fluid can be minimized, since the passageways are aligned in the region of their outlet openings to the predetermined by the shape of the outlet flow direction of the fluid in the fluid channel, resulting in a ge ^¬ wrestle sound development leads. According to one embodiment of the present invention, at least some of the passage channels are guided radially and axially through the pressure reduction body, in particular also in the circumferential direction. In other words, at least some of the through channels extend in contrast to the initially beschriebe- NEN prior art in which all through channels are le ^¬ out diglich two-dimensionally within a single radial plane through the ring-shaped pressure-reducing body, three-dimensionally by the pressure-reducing body. In this way, very long passageways can be achieved, which entail a large pressure reduction. Thus, for example, the number of pressure stages in which a pressure to be degraded is reduced considerably.

At least some of the passage channels preferably have hollow and / or meandering sections. This leads to frequent changes in direction of the fluid flowing through the passageways, which also favors the pressure reduction within the passageways. Advantageously, the through passages cross each other, insbeson ^¬ particular to form a grid-like structure, or are connected to each other via connecting channels. Thanks to such training is a very uniform flow through the Achieved pressure reduction body. In addition, within the Strö ^¬ mung turbulences are generated, which are likewise the pressure reduction to ^¬ träglich. According to one embodiment of the present invention, the cross-section of at least some through-channels is round, formed more ^¬ rectangular, slot-shaped or ring segment-like manner.

Preferably, the cross-section of at least some through-channels increases downstream, in particular continuously.

The exit region of at least some is advantageous

Passage channels viewed in cross-section cone-shaped or pyra ^¬ truncated stump-like design. This prevents the formation of a large number of free jets when the fluid exits the pressure reduction body, which in particular significantly reduces the noise emission.

The outlets of the passage channels are advantageously uniformly distributed over at least one exit surface of the pressure reduction body, which also contributes to low sound power.

According to one embodiment of the present invention, at least one pressure equalization space is provided in the pressure reduction body, which interrupts at least some passageways. On the one hand, such a pressure compensation chamber contributes to the calming of the fluid flowing through the pressure reduction body. On the other hand, the fluid is distributed more uniformly on the passage channels connected to the pressure equalization chamber.

Preferably, the adjusting member is bell-shaped, enclosing the pressure reduction body from the outside and gives the inlet openings of its through channels either free or blocked. Thus, a very simple construction of the pressure adjusting valve is achieved.

Alternatively, the adjusting member is formed like a stem and in a receiving opening of the pressure reduction body before and back movably received, in which the through-channels open so that the adjusting member is the through-channels can be blocked in dependence on its position ^¬ Ab or free ^¬.

Preferably, the extension direction of the passage channels in the region of the outlet openings is inclined less than 30 ° to the direction of flow of the fluid in the fluid channel predetermined by the shape of the outlet, in particular less than 15 °.

Other features and advantages of the present invention will become apparent from the following description of pressure adjusting valves according to various embodiments of the present invention with reference to the accompanying drawings. That's it

Figure 1 is a schematic cross-sectional view ei ^¬ nes according to a pressure adjusting From ^¬ guide of the present invention;

Figure 2 is a schematic cross-sectional view ei ^¬ ner first variant of a pressure reduction body and an adjusting member of the Druckeinstellventils shown in Figure 1, where ^{¬ are shown} in the components only half of te ^¬ ;

Figure 3 is a cross-sectional view taken along the line

A-A in Figure 2;

4 shows an alternative cross-sectional view ent ^¬ long the line AA in Figure 2; Figure 5 is a schematic cross-sectional view ei ^¬ ner second variant of the pressure-reducing body and the adjustment member of the pressure shown in Figure 1, WO are shown in the components in each case only for Hälf ^¬ te;

Figure 6 is a schematic side view of a

third variant of the pressure reduction body of the Druckeinstellventils shown in Figure 1;

Figure 7 is a cross-sectional view taken along the line

B-B in Figure 6, wherein only a quarter of the cross section is shown;

Fig. 3 is a sectional view taken along the line C-C in Fig. 7;

Figu is a schematic cross-sectional view ei ^¬ nes pressure adjusting valve according to a second embodiment of the present invention;

Figure 10 is a schematic cross-sectional view ei ^¬ nes pressure reduction of the pressure body is provided ^¬ in Figure 1, this is shown only half;

Figure 11 is an enlarged view of the marked in Figure 10 by the reference numeral XI section;

Figure 12 is a cross-sectional view taken along the line

D-D in Figure 11;

Figure 13 is a cross-sectional view taken along the line

E-E in Figure 11;

Figures 14 to views showing further possible Ausbil ^¬ tions of fluid channels of a pressure reduction body according to the invention; Figure 17 is a view showing various possible

Shows cross sections of passage channels according to the invention pressure reduction body;

Figure 18 is a schematic cross-sectional view ei ^¬ ner further variant of the pressure reduction body and the adjusting of an inventions ^{¬ to the} invention pressure valve; and

Figure 19 is a schematic cross-sectional view of yet another variant.

Figure 1 shows a pressure adjusting valve 1 according to an embodiment of the present invention.

The pressure adjusting valve 1 comprises a multi-part housing 2, which defines a fluid channel 3 with an inlet 4 and an outlet 5. Further, the pressure adjusting valve 1 comprises a single, integrally formed and arranged in the fluid passage 3 depressurization body 6, which is presently produced using an additive manufacturing process of metal or from an Me ^¬ talllegierung. The pressure reduction body 6 defines a plurality of through channels 7, which connect the inlet 4 in terms of flow with the outlet 5, as will be explained in more detail below. The pressure reduction body 6 is positioned in the fluid channel 3 such that a fluid coming from the inlet 4 can reach the outlet 5 only by passing through the through channels 7 of the pressure reduction body 6. The pressure-reducing body 6 is presently rotationally symmetrical and comprises an upper cylindrical portion 8, in which the inlet openings of the passage channels 7 are circumferentially positioned, a downstream diameter in the conically widening central portion 9 and a lower portion 10, on the front side, the outlet ^¬ openings of Through channels 7 are positioned. In addition, the pressure adjustment valve 1 comprises an adjusting element 11 positioned in the fluid channel, which can be actuated via a valve spindle 12 in a known manner and adjusts or regulates the flow of the fluid through the passage channels 7 of the pressure reduction body 6. In the present case, the adjusting member 11 is bell-shaped and surrounds the upper portion 8 of the pressure reduction body 6 from the outside such that it selectively blocks or releases the entrances of the through-channels 7 in ent ^¬ speaking operation.

Figures 2 and 3 show a first variant of the Druckab ^¬ baukörpers 6. In this variant, the through ^¬ gang channels 7 extending from the peripheral side of the upper Ab ^{¬ section} 8 zigzag or meandering downstream to the front side of the lower portion 10, wherein at least some through-channels 7 via connecting channels 13 are ver ^¬ bound together. The passageways 7 each have a mehr ^¬ angular cross-section, which increases in the flow direction substantially continuously such that the outlet openings of adjacent through-channels 7 are separated from each other only by very thin material webs 14. The outlet openings are very evenly over the

Distributed end face of the lower portion 10 of the pressure reduction body 6 and aligned to the predetermined by the shape of the outlet 5 flow direction of the fluid in the fluid channel 3.

If the adjusting member 11 is moved upwards starting from the position shown in FIG. 2, the peripherally arranged inlet openings of the passage channels 7 of the pressure reduction body 6 are gradually released, so that a fluid passed through the pressure adjusting valve 1 will flow through the inlet 4 Passage channels 7 of the pressure reduction body 6 in the direction of the outlet 5 can flow. Thanks to the formation of the through channels 7, the fluid is often deflected and swirled on its way through the pressure reduction body 6, which is accompanied by a corresponding pressure reduction over the length of the through channels 7. Also carry the continuously increasing in flow direction ^¬ sectional areas of the Passage channels 7 for the relaxation of the fluid at, as well as the connecting channels 13, which also cause a uniform distribution of the Vechi ^¬ fluid through the passage channels 7. Upon discharge of the fluid from the pressure reduction body 6, the truncated pyramidal widening exit areas, the uniform distribution of the outlet openings over the

End face of the lower portion 10 of the pressure reduction body 6 and the very thin material webs 14 between the individual outlet openings that no single free jets are generated. Rather, a very uniform flow results on the outlet side of the pressure reduction body 6, which is accompanied by a very low noise emission.

FIG. 4 shows a variant of the pressure reduction body 6, which differs from the variant described ^{above in} that the cross sections of the individual passage channels 7 are essentially of uniform size with the shape of a quadrate or rhomboid in the present case. The shown in Figure 5 further variant of the pressure reduction ^¬ body 6 has in relation to the shown in Figure 2 pressure reduction body 6 to the effect differences that is formed in this at least one pressure equalization chamber 15, which in the through channels 7 LASS relation between the inputs and Outlet openings is arranged and at least egg ^¬ nige, in the present case all through channels 7 interrupts. Such a pressure compensation chamber 15 contributes to a calming of the pressure reducing body 6 by flowing fluid. On the other hand, the fluid is distributed more uniformly on the passage channels 7 connected downstream with the pressure equalization chamber 15.

Figures 6 to 8 show a third variant of the Druckab ^¬ baukörpers 6, the through-channels 7 have a uniform cross section with a square or rhomboid shape. The passageways 7 extend, as it appears from a Zu ^¬ sammenschau of Figures 7 and 8, staircase or mä- another way both in the axial direction A and in the circumferential direction U by the pressure reduction body. 6

A pressure adjusting valve 1 according to another embodiment of the present invention is shown in FIG. This differs from the one shown in Figure 1 Darge ^¬ presented embodiment that the pressure reduction body 6 does not rest with the end face of its lower portion 10 on the Ge ^¬ housing 2 of the pressure adjusting valve 1, but with the underside of a radially outwardly projecting annular projection 16, the extends between the central portion 9 and the lower portion 10 of the pressure reduction body 6. The Ge ^¬ housing 2 of the pressure 1 is based on this Mo ^¬ ification adjusted accordingly.

The main extension axes 17 of the passageways 7 of the pressure-reducing body 6 are shown in Figure 10 schematically with reference ge ^¬ dot parental lines. Accordingly, the individual passage channels 7 are each initially starting from the peripheral side of the upper portion 8 downwards and radially inwardly ^¬ leads, then extend substantially axially through the central portion 9 and are finally guided in the direction of the end face or the peripheral side of the lower portion 10 , According to FIG. 11, the passage channels 7 extend meandering around their in FIG

Main extension axes 17, wherein its cross-sectional area, as shown in Figures 12 and 13, continuously increases downstream. Figures 14 to 16 show other possible variants of Ausbildungsva ^¬ through channels 7. Figure 14 shows a regular grid-like branch of the through channels 7, whose cross-sectional area increases continuously downstream. FIG. 15 shows a helical arrangement of wrap-around passageways 7. FIG. 16 shows a grid structure of passageways 7 that can be divided into individual tetrahedrons 18 whose side edges each form a portion of a passageway 7. Even if the figures 15 and 16 Show passageways 7 with constant cross section, it should be clear that they can be formed with continuously increasing or discontinuous in the flow direction cross section.

FIG. 17 shows further alternative cross-sectional shapes of passage channels 7. Thus, the through-channels 7 can also be elliptical, teardrop-shaped, triangular, star-shaped, ring-segment-shaped or the like, to name only a few examples.

Figure 18 shows a further variant of a pressure reduction body 6 and a setting member 11. Unlike the embodiment shown in Figure 5 variant, the adjustment member 11 is stempeiförmig formed, and movably inserted in a Aufnahmeöff ^¬ voltage 19 of the pressure-reducing body 6 back and forth, similar to as in the pressure equalization chamber 15 in Figure 5, the passage channels 7 open. Accordingly, the through-channels 7 are selectively blocked or released as a function of the position of the adjusting member 11.

FIG. 19 shows a variant of a pressure-reducing body 6 and an adjusting element 11, which, in analogy to FIG. 18, has the shape of a stem and is movable back and forth in a receiving opening 19 of the pressure-reducing body 6. In this Vari ^¬ ante the inlet openings of the passage channels 7 are frontally and the outlet openings circumferentially angeord ^¬ net, wherein the pressure adjustment valve 1 is flowed through in the direction of arrows 20. Accordingly, the inlet 4 of the housing 2 is here below and the outlet 5 right in the picture.

In all embodiments or variants, the direction of extension of the passage channels 7 in the region of the outlet openings is preferably less than 30 ° to the flow direction of the fluid in the fluid channel 3 predetermined by the shape of the outlet 5, in particular less than 15 °, so that the pressure reduction body 6 leaving fluid can enter the outlet of the pressure adjustment valve 1 unhindered. On In this way, a particularly low sound development is re ^¬ alised.

Although the invention in detail has been illustrated approximately example in more detail by the preferred execution and described, the invention is not ^¬ limited by the disclosed examples and other variations can be derived by those skilled thereof, without departing from the scope of the invention. In particular, it should be noted that the pressure reduction body can basically have any desired shape. The same applies to the number, shape and dimensioning of the through-channels. Accordingly, the design of the Druckein ^¬ vice valve is highly customizable in a variety Anforderun ^¬ gen, in particular in relation to the available space, the desired pressure reduction and the maximum permissible noise emission.

Claims

claims

1. pressure adjusting valve (1) comprising a housing (2),

the one fluid channel (3) with at least one inlet (4) and

defines at least one outlet (5),

a pressure reduction body (6) arranged in the fluid channel (3),

defining a plurality of passageways (7) fluidly connecting the inlet (4) to the outlet (5), and

an adjusting member (11) positioned in the fluid channel (3),

the flow through the through channels (7) of the

Pressure reduction body (6) adjusts, wherein the Druckeinstell ^¬ valve (1) has only a single, integrally formed pressure reduction body (6),

characterized in that

the inlet openings of the passage channels (7) circumferentially on the pressure reduction body (6) and the outlet openings of the

Through channels (7) are positioned on the front side of the pressure reduction body (6) or vice versa.

Second pressure adjusting valve (1) according to claim 1,

characterized in that

at least some of the through channels (7) are guided radially and axially through the pressure reduction body (6),

especially in the circumferential direction (U).

Pressure adjusting valve (1) according to claim 2,

characterized in that

at least some of the passageways (7) have helical and / or meandering sections.

4. pressure adjusting valve (1) according to one of the preceding claims,

characterized in that

Passage channels (7) intersect each other or are connected to one another via connection channels (13).

5. pressure adjusting valve (1) according to one of the preceding claims,

characterized in that

the cross-section of at least some through-channels (7) round, polygonal, slit-shaped or ring segment-like manner out ^¬ forms is.

6. pressure adjusting valve (1) according to one of the preceding claims,

characterized in that

the cross-section of at least some through-channels (7) increases downstream,

in particular continuously increased.

7. pressure adjusting valve (1) according to one of the preceding claims,

characterized in that

the outlet region of at least some through-channels (7), when viewed in cross-section, is of conical or truncated pyramidal design.

8. pressure adjusting valve (1) according to one of the preceding claims,

characterized in that

are the outlets of the through-channels (7) evenly distributed over ver ^¬ ^¬ least to an exit surface of the pressure-reduction body (6).

Pressure adjusting valve (1) according to one of the preceding claims,

characterized in that

in the pressure reduction body (6) at least one pressure equalization ^¬ space (15) is provided which interrupts at least some passage channels (7).

10. pressure adjusting valve (1) according to one of the preceding claims,

characterized in that

the adjusting member (11) is bell-shaped, surrounds the pressure reduction body (6) from the outside and selectively blocks or releases the inlet or outlet openings of its through-channels (7).

11. pressure adjusting valve (1) according to any one of claims 1 to 9,

characterized in that

the adjusting member (11) is formed stempeiförmig, in a receiving opening (19) of the pressure-reducing body forward and backward movable manner and in the receiving opening (19) opens out through channels (7) optionally blo ^¬ ckiert or releases.

12. pressure adjusting valve (1) according to one of the preceding claims,

characterized in that

the extension direction of the through channels (7) in the region of the outlet openings is less than 30 ° to the flow direction of the flow direction predetermined by the shape of the outlet (5)

Fluid in the fluid channel (3) is inclined, in particular less than 15 °.