WO2016001364A1

WO2016001364A1 - Flow deflection in a turbomachine

Info

Publication number: WO2016001364A1
Application number: PCT/EP2015/065108
Authority: WO
Inventors: Ludger Alfes; Wolfgang Freund
Original assignee: Siemens Aktiengesellschaft
Priority date: 2014-07-03
Filing date: 2015-07-02
Publication date: 2016-01-07
Also published as: DE102014212910A1; EP3140549A1

Abstract

The invention relates to a device (1) for flow deflection (2) for a turbomachine (3), in particular for a multi-stage compressor (3), such as a geared turbocompressor (3), and to a method for producing such a device (1). The device (1) comprises a first and a second tubular flow deflection segment (4, 8), which comprise a first and a second flow inlet opening (5, 9) and a first and a second flow outlet opening (6, 10) and a first and a second segment longitudinal axis (7, 11), respectively. The first flow outlet opening (6) of the first flow deflection segment (4) is connected to the second flow inlet opening (9) of the second flow deflection segment (8) in such a way that the second segment longitudinal axis (11) is tilted by a specifiable tilt angle (12) in relation to the first segment longitudinal axis (7). In order to realize a simple and economical device (1), the first and/or the second flow deflection segment (4, 8) has, along the segment longitudinal axis (7, 11) thereof, a first or second inner cross-section change (13, 14). According to the method, a conical tube (23) is divided into two tube segments (4, 8) by means of a miter cut (15, 16) and the two tube segments (4, 8) are connected to each other at the miter cuts (15, 16) thereof.

Description

Flow deflection in a turbomachine

The invention relates to a device for deflecting a fluid flow for a turbomachine, in particular for a multi-stage compressor, such as a Getriebeturboverdichter, and a method for producing such a device.

Compressors or fluid compressing devices are used in various industries for various applications involving compression or compression of fluids, especially (process) gases. Known examples of this are turbo compressors in mobile industrial applications, such as in exhaust gas turbochargers or in jet engines, or in stationary industrial applications, such as gearbox or turbo compressor for air separation.

In such a - continuously operating beitenden in its operation - turbocompressors pressurizing (compression) of the fluid is effected in that an angular momentum of the fluid from entry to exit by a rotating, radially extending blades exhibiting impeller of the Turboverdich ^¬ ters by the rotation of the blades is increased. Here, ie in such a compressor stage, increase the pressure and temperature of the fluid, while the relative (flow) Ge ^¬ speed of the fluid in the impeller or Turbolaufrad decreases.

In order to achieve the highest possible pressure increase or compression of the fluid, a plurality of such compressor stages can be connected in series, wherein the fluid to be compressed is guided from the compressor stage to the compressor stage.

As types of turbocompressors, a distinction is made between radial and axial compressors.

In the axial compressor, the fluid to be compressed, for example a process gas, flows in a direction parallel to Axle (axial direction) through the compressor. In the centrifugal compressor, the gas flows axially into the impeller of

Compressor stage and is then deflected to the outside (radial, Radialrich ^¬ tion). In the case of multistage centrifugal compressors in particular, a flow deflection in the flowing fluid is required behind each stage.

Combined designs of axial and radial compressors absorb large volume flows with their axial stages, which are compressed to high pressures in the subsequent radial stages.

While usually single-shaft machines are used, in (multi-stage) Getriebeturboverdichtern (shortly below only gear compressor) are the individual

Grouped compressor stages around a gear housing, where ^¬ at several parallel (pinion) shafts, each one or two - usually housed in housing designs realized Spi ^¬ ralgehäusen - bearing wheels (arranged on free shaft ends of the pinion shafts turbochargers) of ei - Nem large, mounted in the housing drive gear, a large wheel driven.

Here, too, that in these gear compressors, is a - mostly complex - flow guidance with appropriate currents mung deflections necessary in the fluid flowing to the fluid to be compressed by a compressor stage - gegebe ^¬ applicable, via an intercooler - the next

Conducting compressor stage. Such a transmission compressor, a transmission compressor of

Company Siemens with the designation STC-GC, used for the Luftzerlegung, is out

http: / / www. energy. Siemens. com / hg / en / compaction-expansion-gc. htm (available on 02.06.2014).

Are in these multi-stage compressors, such as the gearbox compressors - to increase the pressure - several compressor stages connected in series, so it is necessary, the fluid to be compressed - possibly via an ^{intercooler ¬} ler - to lead from one compressor stage to the next. In this case, a complex, usually over several flow deflections leading, flow guidance is provided or necessary, which fluidic and / or structural boundary conditions, such as compact designs with short flow paths, changing / decreasing flow cross sections in strö ^¬ mungsführenden lines and uniform, continuous and eddy free Flow conditions in the flowing fluid or in the flow-carrying lines must suffice.

It is known, for example, the flow deflection in egg ^¬ ner flow guidance between two compressor stages of a gear compressor or in a suction line to a

Compressor stage of the gear compressor to realize by a beschau ^¬ felten 90 ° manifold with subsequent reducer. In this case, the 90 ° elbow in the form of two individually manufactured, each cut to 45 ° or produced from correspondingly cut ^¬ cut sheets, (at the 45 ° cutting edges) welded together hollow cylinders with the same internal cross-sections. At the 90 ° bend is adjoined in the direction of fluid flow a (concentric) Re ^¬ duzierstück, for example a DIN-part according to DIN 2616 in the form of a (concentric) cone with a cone angle (hal ^¬ via opening angle between the surface line and the

Cone axis) of about 30 °, which is a pipeline nominal width of the 90 ° elbow or its supply to a

Verdichtersaugnennweite the corresponding (downstream of the fluid) compressor stage reduced.

With such a flow deflection by means of the 90 ° bend, the inner diameter at the seam / (90 °) buckling

/ Welding of the two manifold parts / hollow cylinders large, there are - due to printing technology - there thick wall thicknesses at the two Krümmerteil / hollow cylinders required. thickness Wall thicknesses at the Krümmerteilen of the 90 ° bend but require an increased cost of materials in this or this, which in turn is costly. Also, the Verarbeitungsauf ^¬ wall is increased.

In addition, a cross-sectional reduction in the reducer with - such a steep - cone angle of about 30 ° high / large, which is aerodynamically disadvantageous. From the document, "Pressure loss in segment manifolds with and without load loading", Yoshinobu Morikawa, Osaka, Georg Segler, Stuttgart-Hohenheim, Gründl. Agricultural Engineering Vol. 20 (1970) No. 5, are technical studies on 90 ° elbows at pneumati ^¬ conveying systems - with different versions of 90 ° elbows as bent pipe elbows or as welded Seg ^¬ mentkrümmer - known.

The invention has for its object to realize a Strömungsum- steering for a turbomachine, which improves the disadvantages of the prior art, in particular which is simple and inexpensive to produce and allows a uniform and vortex-free flow.

The object is achieved by a device for deflecting a fluid flow for a turbomachine, in particular for a multi-stage compressor, and a method for producing such a device having the features according to the respective independent claim. The device for deflecting a fluid flow for a

Turbomachine provides a first tubular Strömungsum- steering segment with a first flow inlet and ei ^¬ ner first flow outlet opening and a first segment longitudinal axis.

Thus, in simplified and illustrative terms, the fluid flow may be the first flow diverting segment (entering at the first flow inlet) from the first Flow inlet opening - in the first flow direction along the first segment longitudinal axis (also simplified only tube (- middle / longitudinal) axis) - to the first Strömungsaustrittsöff ^¬ tion (where exiting at the first flow outlet opening) flow through.

Furthermore, the device for deflecting a fluid flow for a turbomachine provides a second flow deflection segment - also with a second flow inlet and a second flow outlet opening and a second segment longitudinal axis.

Here too, the fluid flow can flow through the second flow deflection segment (entering at the second flow inlet opening) from the second flow inlet opening-in the second flow direction along the second segment longitudinal axis-to the second flow outlet opening (exiting there at the second flow outlet opening).

The first flow outlet opening of the first Strömungsum- steering segment is connected to the apparatus in such a manner with the two ^¬ th flow inlet opening of the second segment Strömungsumlen- effect that the second segment of the longitudinal axis is inclined by a predetermined inclination angle relative to the longitudinal axis of the first segment.

Expressed in simple terms, the first flow deflection segment is - via its first flow outlet opening with the second flow deflection segment - at local second Strö ^¬ mung inlet opening - connected (seam) - tilted / tilted by a predetermined kink or inclination angle against the second Strö ^¬ mungsumlenkungssegment. The flow of fluid can thus - when flowing through the two flow deflection segments along the first and the second segment longitudinal axis - by a (dependent on the predetermined inclination / bending angle) deflection angle (bending / inclination angle and deflection angles are mutually complementary to 180 °) vice ^¬ deflects.

The connection between the flow deflection segments can be realized by means of a joining method, in particular by a thermal joining method, such as welding

will be .

Next, the device then provides that the first one

and / or the second flow deflection segment along their respective segment longitudinal axis a first and second

Internal cross section change / -t.

The internal cross-sectional variation of a flow deflection segment via a (longitudinal) portion or each of a plurality of (longitudinal) can portions of the longitudinal extension of the Strö ^¬ mung deflection segments or over the entire Längser ^¬ extension of the flow deflection segment continuously and / or batchwise, in one or done in several stages.

To put it simply, the device here sees one (or two) tubular body (hollow) through which the fluid or fluid flow can flow with a simultaneous integrated change in cross-section ("integrated reducing device").

/ Extension piece "or" segment is the same before Reduzie ^¬ tion (-sstück) / extension (-sstück) ").

The device realized so in a simple and inexpensive way a flow deflection with simultaneous

Flow cross-section adjustment. Especially when required large nominal pipe diameters (such as in suction lines to compressor stages in multi-stage compressors), such as in the range of greater than 600 mm, for example in the range of about 650 mm to 3000 mm, which Rohrleitungsnennwei ^¬ th above cross-sections of standard pipe elbow of max , about 600 mm, the device turns out to be kos ^¬ tensparende solution. Does the flow deflection and the

Flow cross-section adaptation, in particular a

Cross-section reduction, simultaneously (in one component) - and not (in the flow direction) behind one another or in the flow direction following the deflection, so the device can also build compact and space saving, are additional, separate (below the flow deflection to be built ^¬ end) cross-sectional adjustments / Adaptation pieces, in particular reducers or reducers, are no longer necessary here.

Furthermore, in the case of a cross-sectional reduction, the device realizes with its cross-section-reducing segments at its interface between the two flow deflection segments a small or reduced flow cross-section (in comparison to non-cross-section-reducing segment bends), which reduces the cost of materials in the device, their costs and Processing costs reduced.

With the device can be so particular suction lines in multi-stage compressors, such as in Getriebeturboverdichtern, (which suction lines flow deflections (from one to the next compressor stage) and

Flow cross-section adjustments (to the respective

Verdichtersaugnennweite) require), inexpensive and strö ^¬ tion cheap (without (significant) flow losses) decor with dark ^¬ th. According to the method for producing the device for deflecting a fluid flow for a turbomachine, it is provided that a conical tube is divided into two tube segments by a miter cut (with a predefinable miter cutting angle of, for example, approximately 45 °), whereby the first and the second flow deflection segments are formed become . The first flow outlet opening of the first Strömungsum- steering segment forms the one Mithrungsschnittfläche; the second flow inlet opening of the second flow deflection segment forms the other miter cut surface.

The two pipe segments are then joined together at their miter cuts, for example by means of a thermal joining process, such as welding, (one pipe segment being inclined relative to the other by twice the bevel cutting angle (inclination angle) and with the two segment longitudinal axes offset from one another). , whereby the connection between the first and the second Strömungsumlenkungssegment (with there inclination / bending angle) - and so the device for deflecting a fluid flow for a turbomachine - made ^¬ the ^¬ .

The method thus allows for easy, material and

Space-saving, compact and cost-effective way the integration of flow deflection and

Flow cross-section reduction streamlined (without (significant) flow losses) in a component. Preferred developments of the invention will become apparent from the dependent claims and / or from the following explanations - and relate both to the device and to the method. In a preferred embodiment, the

Inside cross section change one

Internal cross-section reduction. That is, in the device, a reducer is "integrated", eliminating (cost / space) consuming "double constructions" of redirection and reduction.

Furthermore, it can preferably be provided that the first

and / or the second flow deflection segment. because it is a conical tube segment, which is particularly cost-effective for such available as standard tubes conical tubes. In this case, the Querschnittreduzierung then takes place continuously over the longitudinal extent of the conical tube segment, which is particularly favorable in terms of flow.

Furthermore, a cone angle (half the opening angle between the generatrices and the cone axis) of such a conical tube segment in the range of about 5 ° to 25 °, in particular for fluidic reasons in a range of about 7.5 ° to 20 °, particularly preferably at about 1.5 °, lie.

According to a particularly preferred development, exactly one first and one second flow deflection segment, if appropriate connected to one another by means of a thermal or mechanical joining process, are provided.

Here, then forming the predetermined angle of inclination to be about 90 degrees, resulting in so mung deflection segments with the (exact) two currents - particularly simple and Kos ^¬ ten / space-saving manner - a streamlined 90 ° (segment) manifolds (90 ° Deflection / deflection angle) can be realized. For example, it may then be further provided for such a 90 ° (segment) manifold that the first flow deflection segment at its first flow outlet opening has a 45 ° (miter) cut (hereinafter also generally referred to as cut edge) and / or the second flow - Mung deflection segment at its second flow inlet ^¬ opening has a 45 ° (miter) section.

This can be particularly easily realized by a conical tube is cut to 45 ° miter.

Regardless of this, the first flow deflection segment can also have a 45 ° (miter) cut / cut edge at its first flow inlet opening or the second flow deflection segment can te flow deflection segment at its second Strömungsaus ^¬ outlet opening a 45 ° (miter) cut / cut edge on ^¬ wise. Hang angle of the flow deflection segments and

(Miter) cutting angle at the first Strömungsaustrittsöff ^¬ tion and at the second flow ^inlet opening, in general "opening angle" at the cutting edge on

Flow deflection segments out and in, together, so the inclination angle - and thus the deflection angle or size of the deflection can be designed or dimensioned on the basis of the cutting angle / angle.

According to another particularly preferred embodiment, a plurality of the first and / or second Strömungsumlenkungs- segments are provided. Expressed in simple terms, this development realizes a "multi / multi-segment manifold" whose "individual kinks" between each two of the flow deflection segments add up to the total kink - and thus to the total deflection.

The individual segments can be connected to each other by means of a thermal and / or mechanical joining process.

The individual segments can also be produced by mitring cuts on a conical tube ^therefrom . If the flow diversion is distributed over several / many individual kinks, a particularly streamlined (total) deflection can be realized thereby.

For example, it can be provided here that, for realizing a 90 ° multiple segment bend (with 90 ° total bend or 90 ° total deflection), four flow deflection segments with three individual buckles each having a length of 30 ° (between because two of the four Strömungsumlenkungssegmente) (there each ^¬ Weils 150 ° individual deflection) are provided.

It can also be provided, on a first inner periphery of the first flow deflection segment and / or on a second inner circumference of the second flow deflection segment and / or on an inner periphery in a region at the connection between the first and second flow deflection segments, flow guide elements, in particular straight flow conducting sheets and / or curved deflecting vanes are arranged.

The same applies to several or a plurality of Strömungsumlenkungssegmente. As a result, the flow guidance in the device can be improved and / or secondary disturbances by vortices in the region of the deflection / deflections can be minimized.

Such flow guide can be inserted into the device or into the interior of the device, for example, transferred to the flow deflection segments provided / incorporated slots - and then by means of a Fügever ^¬ driving, such as a thermal joining method, for example by welding, within (for example by an internal weld) and / or outside (for example by an external weld) are fixed to the device.

Furthermore, additional, additional attachment parts, such as an additional tube or a further tube guide and / or a reduction, may be provided on the device.

In particular, it may be provided to arrange at the second flow ^outlet opening a further tubular Strömungsseg ^¬ ment, in particular straight pipe segment or a Reduzierseg- ment. As a result, complex flow guides can be made streamlined. If a (flow) cross-section reduction or a part of a required (total) cross-section reduction already takes place through the device, then a cone angle at a Reduziersegment (reduction) - streamlined - can turn out to the predetermined (total)

Cross-section reduction, for example to a

Compressor suction range, to realize.

It is aerodynamically favorable also to arrange this further tubular shaped flow segment such that their Strö ^¬ mung segment longitudinal axis is aligned parallel to the longitudinal axis of the second segment.

It can also be provided that the first and / or the second flow deflection segment consist of a metal connection. Sheet metal / sheet metal parts are particularly preferably used ^¬ bar, such parts are available inexpensively.

According to a further preferred embodiment, it is provided that the device in a suction line of a

Compressor stage of a multi-stage compressor, in particular a transmission compressor is arranged. The device can thus - in a particularly simple, inexpensive, compact and streamlined manner - direct the flow and its cross section of nominal pipe diameter

Reduce the compressor suction range.

In other words, it is a multi-stage compressor, the special ^¬ a transmission compressor realized which zumin- least one of the devices for deflecting a fluid flow, where appropriate, including the described embodiments and / or refinements has.

The device can also be used for other types of turbomachines, such as turbines, for local flow guidance, for example between turbine stages. The description of advantageous embodiments of the invention given hitherto contains numerous features which are reproduced in some detail in the individual subclaims. However, those skilled in the art will conveniently consider these features individually and summarize them to meaningful further combinations.

The above-described characteristics, features, and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following description of one or more embodiments, further illustrated in connection with the figures will or will be. However, the invention is not limited to the combination of features specified in the exemplary embodiments, not even with regard to functional features. So can also be considered explicitly isolated to appropriate features of each Ausführungsbei ^¬ play, removed from one embodiment may be incorporated into another embodiment, to supplement its provisions.

Function / design the same or identical elements or compo nents ^¬ have in the embodiments or figures che same reference numerals.

Show it

1 shows a concentrically bladed manifold in one

Suction line in a multi-stage transmission compressor and

2 shows a bladed segmental manifold in a suction line in a multi-stage transmission compressor. Exemplary embodiment: concentrically bladed manifold in a multistage transmission compressor (FIG. 1)

To a process medium 2, ie, a process gas 2, in a multi-stage gear compressor 3 from an intercooler 26 between two compressor stages 28, 29, ie (in general nomenclature) a first 28 and a subsequent second compressor stage 29, the gear compressor 3 to the suction side 27 of leading to second compressor stage 29, is from Aufstel ^¬ lt] lungsgründen reasons or structural reasons, a flow of the process gas 2 with a flow deflection of 90 ° necessary.

This flow guidance or the 90 ° flow deflection is 15 compact as possible with small dimensions and strömungsgüns ^¬ tig to make the transmission compressor 3 even compact and cost-effective and with high efficiency.

20 Moreover, in the flow guide between the first and the second compressor stage 28, 29 to reduce the piping ^¬ nominal diameter 24 to the Verdichtersaugnennweite 25 of the second compressor stage 29, to about the flow ^¬ guide to the second compressor stage 29 use and the relevant

25 Verdichterersaugnennweite 25 of the suction line 21 to connect.

Furthermore, the process gas flow after the 90 ° deflection should be performed uniformly without disturbing vortex in the compressor suction side 27 of the second compressor stage 29, thereby 30 a uniform flow of impellers (not shown) of this compressor stage 29 and a high efficiency of the compressor stage 29 and des Gear compressor 3 to ensure ^¬ afford.

FIG. 1 shows a detail of the flow ^guidance with a concentrically bladed 90 ° bend 1 in the suction line 21 between the first and the second compressor stage 28, 29 in the multi-stage gearbox compressor 3, which is on simple and cost-effective manner called requirements rea ^¬ lisiert.

As FIG 1 shows, the concentrically bladed 90 ° elbow 1, a first conical 4 and a second conical segment 8, which by a 45 ° miter 15, 16 on a conical metallic tube 23 (each to the pipe center axis / -längsachse 7, 11 normal entrance 5 and exit surface 10) are made.

This conical tube 23 has a cone angle (γ, φ) 13, 14 of about 7.5 °, whereby an initial / initial cross-section 24 of about 1200 mm over a length (of the conical tube) of about 500 mm an end cross section 25 of about 1069 mm

(Compressor suction distance 25) is reduced.

By a - in some the middle of the longitudinal extent of the conical tube 23 attached - 45 ° miter 15, 16 (cutting edge is tilted by 45 ° to the normal to the pipe center line or pipe axis 7, 11), the conical tube 23 in two ( Tei ^¬ le / segments 4, 8 separated, resulting in the two segments 4, 8 "their" 45 ° miter cut surfaces (as the outlet opening 6 of the first 4 or as an inlet opening 9 of the second segment 8 forming surfaces ).

The one cut-off part, in this case then the second conical segment 8, becomes the other cut-off part, in this case then the first conical segment 4, rotated 180 ° about its center line 11, rotated by 90 °. tilted 12 and then at the center line 7 of the first conical segment 4 offset at the miter 15, ie over the edge coverage at both Miter cutting surfaces (6/15, 9/16) on the two segments 4, 8, welded again.

This results in a 90 ° tilt 12 (with respect to the two segment center lines / longitudinal axes 7, 11) in the two Segments 4, 8, whereby the 90 ° flow deflection 37 is realized.

Due to the conical design / shape of two segments 4, 8, the compound is unsymmetrical and the point of intersection 30 of the two center lines 7, 11 of the two segments 4, 8 is situated, as FIG 1 shows outside the miter cut / the miter cut ^¬ surfaces or connecting surface / Buckling surface (6/15, 9/16). The ^¬ ser offset of the intersection point 30 enables the two segments 4, 8 at their miter cuts / -flachen (6/15, 9/16) aerodynamically be welded without edge offset.

By this embodiment, 90 ° flow deflection 37 and reducing the flow cross-section (from the initial nominal pipe diameter 24, here 1200 mm, on the

Compressor suction range 25, here 1069 mm) streamlined into a component, which also builds compact and space-saving integrated. Furthermore realized the 90 ° elbow 1 with his

cross-section reducing two segments 4, 8 at their interface a small or reduced flow cross-section 17 (compared to non-cross section reducing segment bend), which reduces the cost of materials - since thinner wall thicknesses at the conical tube 23 are possible - at the 90 ° elbow 1 and thereby also the costs and proces ^¬ maintenance effort reduced.

To improve the flow guidance and to minimize secondary disturbances by vortices in the region of the deflection, as shown in FIG. 1, the following curved curved guide vanes 18 are used in the region of the miter cut (6/15, 9/16) or the segment connection , For this purpose, slits 31 are introduced into the 90 ° bend 1 over the circumference 17 in the area of the segment connection (6/15, 9/16), in which the deflection vanes are distributed uniformly 18 are inserted into the interior of the 90 ° elbow 1 - and fixed by Au- ßenverschweißung on the 90 ° elbow 1.

Via the inlet opening 5 on the first conical segment 4, the process gas 2 flows (over there

1200 mm) into the 90 ° elbow 1, there is - guided by the Umlenkschau ^¬ blades 18 - evenly, without turbulence deflected by 90 ° and flows through the outlet opening 10 (over there

1089 mm) on the second conical segment 8 from the 90 ° bend 1.

After exiting the 90 ° bend, the process gas 2 flows through a 100 mm short, cylindrical, immediately (in the flow direction) after the 90 ° elbow 1 arranged pipe section 33, which also has the Verdichtersaugnennweitenquerschnitt 25 of about 1069 mm.

An additional, space-requiring and possibly flow-reducing reducer, which - only after the deflection - would have to ensure a reduction in the flow cross-section on Verdichtersaugnennweitenquerschnitt, is thus no longer necessary, the process gas 2 already exits with Verdichtersaugnennweite 25 from the 90 ° elbow 1.

This short, cylindrical tube piece 33 is then connected to a suction nozzle 34 on the suction side 27 of the second

Flanged compressor stage 29. By this, shown in Figure 1, cost, low Mate ^¬ rialaufwand and welding cost-requiring, flow-efficient flow deflection with simultaneous reduction of the flow cross-section suction lines of transmission compressors can be made more compact and less expensive and streamlined. This makes it possible to reduce the overall installation space of transmission compressors or systems and thereby save further costs. Embodiment: A bladed Segmentkrümmer in a multi-stage geared compressors (FIG 2) FIG 2 shows a detail of an alternative Strö ^¬ mung lead in the suction line 21 of the transmission compressor 3 (of Figure 1), which alternative flow guide - as that of Figure 1 - in a simple and Inexpensive manner the ge ^¬ named requirements for such flow guides, such as compact design, streamlined, material-saving, easy to build, inexpensive, high efficiency realized.

Also, this alternative, in the suction line 21 between the first and the second compressor stage 28, 29 in the multi-stage gear compressor 3 built-flow guidance, i. a bladed (90 °) segmental manifold 1 (hereinafter segmented manifold 1 only), realizes the (flow) deflection, here also 90 ° deflection, and (flow) Querschnittreduzierung in a component.

As shown in FIG. 2, the segment bend 1 has a plurality, ie in this case four, conical (in the following further used nomenclature one to four) (individual) segments 4, 8, 4, 8, which are formed by corresponding miter cuts 15, 16 on a conical metallic tube 23 (with each of the pipe center axis / longitudinal axis 7, 11, 7, 11 normal entry ^¬ 5 or exit surface 10) are made.

This conical tube 23 has a cone angle 13, 14 (γ, φ) of about 5 °, whereby a starting / starting cross-section 24 of about 1200 mm over a length (of the conical tube 23) of about 500 mm on a End cross section 35 of about 1113 mm redu ^¬ is reduced. By - each at a quarter of the total length / - length of the conical tube 23, oppositely ge ^¬ inclined attached three - 15 ° miter cuts 15, 16

(Cutting edge is in this case (in each case opposite inclined) to the 15 ° tilted against the normal to the pipe center line or Rohrlängs ^¬ axis 7, 11), the conical tube 23 in four (approximately equally long) parts / segments 4, 8, 4, 8 separated, where ^¬ by itself at the four Segments 4, 8, 4, 8 "their" 15 ° face cut surfaces (6/15, 9/16, 10/15, 5/16, 6/15, 9/16)

(As the outlet opening 6, 10 of the or as inlet opening 5, 9 of the respective segment 4, 8, 4, 8 forming surfaces) erge ^¬ ben. A respectively cut part / segment 4, 8, 4, 8 is rotated / rotated by 180 ° about its respective center line 7, 11 to the respective other cut part / segment 4, 8, 4, 8 by 30 °, tilted / tilted by 30 ° 12 (Single-flow deflection 22) and then at the center line 7, 11 offset at the miter cut, ie on the edge coverage at both miter cut surfaces (6/15,

9/16, 10/15, 5/16, 6/15, 9/16) welded to the respective segments to be joined 4, 8, 4, 8, again.

This results in a 90 ° tilt (with respect to the four segment center lines / longitudinal axes) in the four segments 4, 8, 4, 8, whereby the 90 ° flow deflection 37 is realized.

Due to the conical design / shape of the segments 4, 8, 4, 8, the connections are asymmetrical and the crossing points

30 of the respective two center lines 7, 11 of the respective two segments 4, 8, 4, 8 lie, as shown in FIG. 2, outside the miter cuts / cut surfaces or joint surfaces / buckling surfaces (6/15, 9/16, 10/15, 5/16, 6/15, 9/16).

This respective offset of the crossing point 30 makes it possible to the segments 4, 8, 4, 8 at their miter cuts / - surfaces (6/15, 9/16, 10/15, 5/16, 6/15, 9/16) respectively to weld in a streamlined manner without edge offset.

By this embodiment, 90 ° flow deflection 37 and reducing the flow cross-section (from the initial nominal pipe diameter 24, here 1200 mm, on the Segment manifold outlet 35, here 1113 mm) strömungsgüns ^¬ tig into a component which also compact and space ^¬ saving builds integrated. Furthermore, the segment manifold 1, with its cross-section-reducing four segments 4, 8, 4, 8, realizes small or reduced flow cross ^sections at their respective seams (in comparison to segment elbows that do not reduce the cross section), which increases the material expenditure - since the thinner wall thicknesses in the conical Pipe 23 are possible - reduced in the segment bend 1 and thereby reduces its cost and processing costs.

To improve the flow guidance and to minimize secondary disturbances by vortices in the region of the deflection, as shown in FIG. 2, straight flow-conducting sheets 18 are arranged in the middle two segments 8, 4 (segment two 8 and segment three 4) between the miter cuts (FIG. 15, 9/16, 10/15, 5/16, 6/15, 9/16).

For this purpose - over the circumference 17 of the second and third segment 8, 4 evenly distributed straight - slots 31 incorporated ^¬ introduced, in which the plates 17 inserted into the interior of Segmentkrüm ^¬ mers 1 - and are fixed by Außenverschweißung to the Segmentkrümmer.

Via the inlet opening 5 on the first conical segment 4 flows (in the flow direction 32), the process gas 2 (over there pipeline nominal width 24 of about 1200 mm) in the segment 1, is there - guided by the

Sheets 17 - uniformly deflected and without turbulence at 90 ° over the four segments 4, 8, 4, 8 flows through the off ^¬ exit opening 10 (over thereat of outlet wide cross section 35 of about 1113 mm) on the fourth tapered segment 8 from the segment ment manifold 1 (in the flow direction 32).

After emerging from the segmental manifold 1 flows through (in Strö ^¬ flow direction 32 and with flow segment longitudinal / - central axis 20 in extension of the (fourth) segment length - / - central axis), the process gas 2, a conical, exhibiting a cone angle of approximately 7 °, 179 mm short, directly (arranged in flow ^¬ direction 32) after the Segmentkrümmer 1 Reduzie- extension piece 19, that the flow cross-section at the Pro ^¬ zessgasströmung (from the exit cross-section 35 at the wide Segmentkrümmer 1 of about 1113 mm) to the

Verdichtersaugnennweitenquerschnitt 25 of about 1069 mm redu ^¬ ed.

This reduction piece 19 is then applied to a suction nozzle 34 at the suction side 27 of the second compressor stage being flanged ^¬ 28th By this shown in Figure 2, cost, low Mate ^¬ rialaufwand and welding effort required, flow-favorable flow deflection with simultaneous reduction of the flow cross-section suction lines of transmission compressors can be made more compact and cost effective and streamlined. This makes it possible to reduce the overall installation space of transmission compressors or systems and thereby save further costs.

Although the invention has been further illustrated and described in detail by the preferred embodiment (s), the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Claims

claims

1. Device (1) for deflecting a fluid flow (2) for a turbomachine (3), in particular for a multistage compressor ^¬ (3), with at least

a first tubular flow deflection segment (4) having a first flow inlet (5) and a first flow outlet ^opening (6) and a first segment longitudinal axis (7),

- and a second flow deflection segment (8) with egg ^¬ ner second flow inlet (9) and a second flow outlet opening (10) and a second segment longitudinal axis (11),

- wherein the first flow outlet opening (6) of the first flow deflection segment (4) is connected to the second flow inlet opening (9) of the second Strömungsumlenkungssegments (8), that the second Seg ^¬ mentlängsachse (11) by a predetermined inclination angle (12) relative to the first Segment longitudinal axis (7) is inclined,

characterized in that

- The first and / or the second flow deflection segment (4, 8) along their respective segment longitudinal axis (7, 11) has a first or second internal cross-sectional change (13, 14) / -t.

2. Device (1) for deflecting a fluid flow (2) according to claim 1,

in which the internal cross-section change (13, 14) a

Internal cross-section reduction (13, 14).

3. Device (1) for deflecting a fluid flow (2) according to at least one of the preceding claims,

^wherein the first and / or the second Strömungsumlenkungsseg ^¬ ment (4, 8) one or in each case a conical pipe segment (4, 8).

4. Device (1) for deflecting a fluid flow (2) according to at least the preceding claim,

in which a cone angle (13, 14) of the conical tube segment (4, 8) is in the range of approximately 5 ° to 25 °, in particular in a range of approximately 7.5 ° to 20 °.

5. Device (1) for deflecting a fluid flow (2) according to at least one of the preceding claims,

with exactly the first and the second Strömungsumlenkungsseg- ment (4, 8), wherein the predetermined inclination angle (12) unge ^¬ approximately 90 °.

6. Device (1) for deflecting a fluid flow (2) according to at least one of the preceding claims,

in which the first flow deflection segment (4) has a 45 ° miter cut (15) at its first flow inlet (5) and / or at its first flow outlet opening (6) and / or at which the second flow ^deflection segment (8) at its second flow ^deflection segment (8) Strömungseintritts- (9) and / or at its second flow outlet opening (10) has a 45 ° miter cut (16).

7. Device (1) for deflecting a fluid flow (2) according to at least the two preceding claims,

in which the first flow ^deflection segment (4) has a 45 ° miter cut (15) at its first flow outlet opening (6) and the second flow ^deflection segment (8) has a 45 ° miter cut (16) at its second flow ^inlet opening (9).

8. Device (1) for deflecting a fluid flow (2) according to at least one of the preceding claims,

with a plurality of the first and / or second Strömungsumlen- kungssegmenten (4, 8).

9. Device (1) for deflecting a fluid flow (2) according to at least one of the preceding claims,

in a first inner circumference (17) of the first flow diverting segment (4) and / or on a second inner circumference (17) of the second flow diverting segment (8) and / or on an inner circumference (17) in an area on the connection between the first and the second Strömungsum- steering segment (4, 8) flow guide elements (18), in particular ^¬ straight flow-conducting sheets (18) and / or curved Umlenkschaufeln (18) are arranged.

10. Device (1) for deflecting a fluid flow (2) according to at least one of the preceding claims,

in which at the second flow outlet opening (10) a further tubular flow segment (19), in particular ge ^¬ rades pipe segment (19) or a Reduziersegment (19), arranged such that the flow segment longitudinal axis (20) aligned parallel to the second segment longitudinal axis (11) is.

11. Device (1) for deflecting a fluid flow (2) according to at least one of the preceding claims,

arranged in a suction line (21) of a compressor stage (29) of a multi-stage compressor (3), in particular a gear compressor (3).

12. Multi-stage compressor (3), in particular gear compressor (3), with at least one device (1) for deflecting a fluid flow (2) according to at least one of the preceding claims.

13. A method for producing a device (1) for deflecting a fluid flow (2) for a turbomachine (3), in particular for a multi-stage compressor (3), according to at least one of claims 1 to 12, in which

- A conical tube (23) by a miter cut (15, 16) is divided into two tube segments (4, 8), whereby the first and the second flow deflection segment (4, 8) is formed, and

- The two pipe segments (4, 8) are joined together at their miter cuts (15, 16), whereby the connection between the first and the second flow deflection segment (4, 8) is made.

14. A method for producing a device (1) for deflecting a fluid flow (2) for a turbomachine (3) according to claim 13, wherein the first Strömungsumlenkungs ^¬ segment (4) with the second Strömungsumlenkungssegment (8) using a thermal Joining method is connected to each other, in particular welded.

15. A method for producing a device (1) for deflecting a fluid flow (2) for a turbomachine (3) according to claim 13 or claim 14, wherein the conical tube (23) is cut to 45 ° miter.