EP3493889A1 - Dampfsieb und verfahren zur herstellung eines dampfsiebes - Google Patents
Dampfsieb und verfahren zur herstellung eines dampfsiebesInfo
- Publication number
- EP3493889A1 EP3493889A1 EP17742677.2A EP17742677A EP3493889A1 EP 3493889 A1 EP3493889 A1 EP 3493889A1 EP 17742677 A EP17742677 A EP 17742677A EP 3493889 A1 EP3493889 A1 EP 3493889A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sieve
- steam
- screen
- vapor
- openings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/103—Curved filtering elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
Definitions
- Vapor sieve and method for producing a vapor sieve The present invention relates to a vapor sieve having a sieve surface of substantially cylindrical or conical shape and having a plurality of sieve openings for the passage of steam, which are formed in a screen jacket of the steam sieve defining the sieve surface. Furthermore, the invention relates to a method for producing such a vapor sieve.
- Such steam strainers are known in various designs from the prior art and are used, for example, in steam flow passages of steam turbine plants in order to trap unwanted foreign bodies in the relevant steam flow passage so that downstream system components downstream of the steam sieve are protected against damage.
- the steam sieve according to the invention is characterized in that the shape of the sieve surface deviates from an ideal cylindrical or conical shape and / or the sieve shroud has a varying thickness viewed over the sieve surface and / or va ⁇ riiert a shape of the sieve openings on the sieve surface.
- the inventive method for producing a derarti ⁇ gen vapor sieve is characterized in that for a given installation environment of the produced steam sieve shape design of the produced steam sieve is set and the vapor sieve is produced by means of a generative manufacturing process according to the determined Formgestal ⁇ device.
- an inventive steam sieve or dung OF INVENTION ⁇ produced according steam sieve can depending on the specific requirements tion are provided with a very low flow resistance and / or be ⁇ Sonders high mechanical strength and thus preserving ⁇ ness.
- the Screen surface a cylindrical or conical shape having and / or the screen jacket has a uniform thickness and / or all of the screen openings are designed identical, is not overall in conventional installation environments to a very small flow resistance at gleichzei ⁇ tig high mechanical strength and low material ⁇ effort to achieve.
- the basic idea of the invention is a (more or less extensive) optimization of the shape design of the
- the concrete realization of this basic idea according to the invention uses at least one, preferably several and in particular z. B. all three of the above design details, namely the details regarding the shape of the screen surface, the thickness of the screen shell, and the shape of the screen openings.
- the sieve surface is curved dop ⁇ pelt in at least one region, ie in particular z. B. in at least ei ⁇ nem area a "convex" bulge (ie, radially outward) or indentation (ie radially inward).
- thickness of the basket is to be understood that ge ⁇ covered area in the sense of He ⁇ invention under the "screen surface" of the steam screen, the ver ⁇ runs in the center of the basket, which is a "center area", which ver ⁇ runs in the middle between an outer surface and an inner surface of the screen shell.
- the screen surface can be viewed from the outside in we ⁇ iquess an area of the screen surface such. B. have a concave curvature, in particular biaxial concave curvature.
- the screen surface is formed substantially symmetrically with respect to a center plane extending in the axial direction of the vapor sieve.
- Section looks at an angle at at least one point.
- the screen surface in one and the same section considered several bends, wherein z.
- particular step in the section of the screen surface may be formed.
- the screen surface is formed in a section along a plane extending in the axial direction of the Dampfsie- bes on at least one side of an arc.
- Such an arc in the section is equivalent to a bulge or indentation formed over the substantially entire axial extent of the sieve surface at the relevant point of the circumference.
- the screen surface is formed in the section ent ⁇ lang viewed from the plane extending in the axial direction of two arcs, each of these arcs is equivalent to each with a bulge or indentation at the relevant point of the circumference.
- the sieve surface viewed in a section along a second plane extending in the axial direction of the vapor sieve and orthogonal to the first-mentioned plane, likewise forms on at least one side of an arc is, in particular z.
- such thickness can for. B. vary in axial ⁇ direction of the steam sieve.
- the thickness varies by at least ei ⁇ NEN factor of 1.1, that is, a maximum thickness of the basket at least 1.1 times a minimum thickness of Siebman ⁇ means of. In one embodiment, the thickness varies at least Wenig ⁇ a factor of 1.5. In one embodiment, however, this factor is less than 5, in particular less than 4.
- the thickness of the screen shell varies substantially continuously, d. H. makes this thickness no pronounced jumps.
- the steam sieve or at least the screen jacket is integrally formed, for. B. from a me ⁇ tallischen material. Alternatively comes z. As a ceramic material into consideration.
- the variation of the thickness of the screen shell over the screen surface is considered such that in the situation of use of the vapor sieve, so if its screen openings z. For example, from the radially outside to the radially inside (or vice versa) flows through a higher stability of the strainer jacket in comparison with a strainer made of the same amount of material with the same sieve surface, but uniform thickness.
- the shape of the screen openings (viewed at least) varies over the axial direction of the vapor sieve.
- the shape of the screen openings varies as viewed over the circumferential direction of the vapor sieve.
- variation of the shape of the sieve openings may relate, on the one hand, to their opening area or their volume and, on the other hand, to their shaping (contouring).
- At least part of the screen openings are formed as channels and depending Weil ⁇ an obliquely extending through the screen shell
- the screen openings are formed as channels and each provide an obliquely extending through the screen shell flow and / or each have a curved course
- a variation of the shape of the screen openings may be provided which substantially the flow direction or the direction of the curvature is concerned.
- an elongated transverse have cut (for example, oval sieve openings or slit-like sieve openings).
- a portion of the screen openings at least has an at least approximately hexagonal cross section, in which case a Sechseckwabentechnik is formed by the arrangement of the Subject Author ⁇ fenden screen openings preferred.
- a Sechseckwaben Design is formed by the arrangement of the Subject Author ⁇ fenden screen openings preferred.
- "at least a portion of the screen openings" has a be ⁇ voted property, it can be for this purpose z. B. apply that z. B. more than 50%, in particular more than 80%, the sieve openings has this property.
- a vapor sieve arrangement comprising
- a housed in the housing of the steam sieve here be ⁇ type described for screening of steam, which flows to an inlet-side housing portion in the housing and leaves the housing again after flowing through the basket to a discharge-side housing portion,
- Housing area tethered valve housing is housed.
- the inlet-side housing region and / or the outlet-side housing region may each be tubular (eg with a circular cross-section) and / or be connected in one piece to a central housing section (from which the inlet-side and outlet-side housing regions extend away).
- the ones from the inlet side and outlet side may each be tubular (eg with a circular cross-section) and / or be connected in one piece to a central housing section (from which the inlet-side and outlet-side housing regions extend away).
- housing areas predetermined steam flow directions are not equal according to an embodiment, but extend at an angle to each other.
- the vapor flow direction of the outlet-side housing region is oriented at least approximately orthogonally (eg angled in a range from 70 ° to 110 °) with respect to the vapor flow direction of the inlet-side housing region.
- the vapor sieve may be accommodated in the housing in such a way that the vapor flowing in on the inlet side flows through the sieve jacket of the vapor sieve in the radial direction from the outside to the inside and then continues to flow in the axial direction in the interior of the vapor sieve and thus recycles the vapor sieve toward the outlet side housing region. leaves.
- the steam valve can be relatively easily integrated in the housing, z.
- a valve body which is movably arranged in the outlet-side housing region (eg valve disk) and an actuating member connected to the valve body for its actuation, such as a push rod or a valve spindle, which passes through the vapor sieve in the axial direction and further through a corresponding passage can run out of the housing on the housing.
- a suitable shaping of the produced steam sieve may, for example, for the predetermined Installati ⁇ onsum compassion of the produced steam sieve using a CFD simulation first be determined, in particular regarding the Strö ⁇ tion resistance and / or the mechanical stability of the vapor sieve (more or less largely) optimized Formge ⁇ design to produce the vapor sieve by means of a genera ⁇ tive manufacturing process according to the previously determined or based on an optimization determined shape design.
- the generative manufacturing process it may, for. B. to a casting process such as in particular a investment casting.
- a so-called 3D printing can be provided as a generative production method, in which a layered structure of the vapor sieve is thus effected.
- Suitable materials for the steam sieve are, in particular, metals or ceramics.
- FIG. 1 is a radial sectional view of a Dampfsiebanord- tion according to an embodiment, an axial sectional view of the Dampfsieban extract along the line II-II in Fig. 1, an axial sectional view of the Dampfsieban extract along the line III-III in Fig. 1, and a perspective, partially sectioned
- Fig. 1 through Fig. 3 show a Dampfsieban onion 10 comprising a housing 20 and a housed therein steam ⁇ screen 30 for screening steam, which flows to a einlassseiti- gen housing portion 22 in the housing 20, and after flowing through the steam sieve 30, the housing 20 leaves on a leave-side housing portion 24 again.
- case 20 may in particular z. B. to a quick-closing valve housing a verse with the steam sieve 30 henen quick-acting in the live steam supply of a steam turbine plant.
- valve body for opening and Closing the steam valve movable in the outlet side could (not shown in the figures) valve body for opening and Closing the steam valve movable in the outlet side
- Housing portion 24 is arranged and z. B. by means of a valve ⁇ spindle to be moved, which is performed by a housing cover 26 of the housing 20.
- a valve ⁇ spindle to be moved, which is performed by a housing cover 26 of the housing 20.
- an opening 28 is shown by way of example in the housing cover 26 through which said valve stem (sealed) would extend.
- the steam sieve 30 as shown has an approximately zy ⁇ -cylindrical shape and is in the illustrated istsbei ⁇ play defining of a single piece made of metal and a screen surface of the steam sieve 30 ge screening jacket forms ⁇ 32nd
- a plurality of screen openings 34 are formed for the passage of steam.
- a special feature of the steam sieve 30 and the so-trained Dampfsieban extract 10 is that the shape of the screen surface is not an ideal cylinder form another idea ⁇ le cone shape but a deviating form ⁇ design features, the advance for that instal ⁇ onsum compassion (Housing 20) was determined as one with respect to a low flow resistance and / or a particularly high mechanical shear ⁇ stability using a CFD simulation to the steam sieve 30 then by means of a generative manufacturing process such.
- the screen surface is bigger ⁇ tenteils doubly curved, whereby the screen surface from both ⁇ concavities (see. Eg. B. Fig. 2 right) and recesses (see FIG. Z. B. Fig. 2 to the left and Fig. 3) has.
- FIGS. 2 and FIG. 3 is seen that the Siebflä ⁇ che considered in the shown axial sections each formed of two arcs.
- the screen surface is in the axial sectional plane of FIG. 2 be ⁇ considered to consist of two arcs, of which the left in Fig. 2 arc viewed from the outside represents a concavity, whereas the right in Fig. 2 arc viewed from the outside represents a convexity.
- the two sheets z. B. Both form a concave or both a convexity.
- an axis extending in the axial direction and parallel to the "flow direction" of the steam sieve center plane of the steam sieve is a symmetry plane of the sieve surface (as described, for. Example, in the illustrated From ⁇ guide for the case).
- the screen jacket 32 has a varying thickness viewed over the screen surface. This is z. B. in the radial section of
- Fig. 1 can be seen in which viewed in this section of the screen jacket 32 is thickened at two points appreciably.
- the ⁇ according to the thickness of the basket 32 varies in this embodiment, at least in the circumferential direction of the steam sieve 30 considered. Alternatively or additionally, this thickness can also vary in the axial direction of the steam sieve 30.
- the variation of the thickness of the sieve jacket 32 may also have been determined in the context of the already mentioned optimization of the steam sieve, this variation in thickness being of importance in particular for an increase of the mechanical load capacity given a material expenditure for the sieve jacket 32.
- Another peculiarity is that a shape of the screen openings 34 varies across the screen surface.
- this shape varies both over the axial direction of the vapor sieve 30 and over the circumferential direction of the vapor sieve 30.
- a straight, d. H. Provide oriented flow orthogonal to the plane of the screen surface.
- screen openings 34 such. B. in Fig. 1 in the side and in the upper region, which extends obliquely through the screen jacket 32
- the screen openings 34 are formed in the example shown as integration to channels, wherein a part (for. Example, from Fig. 1, below it ⁇ clear, has a rectilinear path, while another part, for. Example of FIG. 1 above
- a very extensive optimization of the vapor sieve can be achieved 30 be accomplished with regard to its flow resistance.
- the deflection of the steam flow when passing through the screen jacket 32 is on the one hand as in the radial section view of Fig.
- FIG. 4 shows a detail of a screening jacket 32a with Sieböffnun ⁇ gene 34a, which are arranged in this example or the region shown in Fig. 4 on a (imaginary) square grid and each have approximately a square cross-section.
- the screen jacket 32a may, for. B. represent the screen jacket 32 of the above ⁇ be ⁇ already described embodiment, or the screen shell of a differently designed inventive steam sieve.
- Fig. 4 are each located between adjacent screen openings 34a webs of material per ⁇ wells an airfoil-like profile, so that the screen openings 34a respectively cause a desired deflection of the flow of the Dampfströ ⁇ mung in the course through the screen jacket 32a.
- an arrangement of screen openings in which the individual screen openings each have an at least approximately hexagonal cross-section and in a hexagonal section is of particular interest in the context of the invention Are arranged in a grid, so as to form a hexagonal honeycomb structural ⁇ structure.
- Such a structure has z. B. the advantage that at a comparatively large total area of the screen openings (in relation to the size of the screen surface) and thus low flow resistance and low Materialauf ⁇ wall yet a relatively high mechanical strength he ⁇ is targetable.
- the invention enables the creation of a very advantageous, in particular z. B. using a
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016220636.2A DE102016220636A1 (de) | 2016-10-20 | 2016-10-20 | Dampfsieb und Verfahren zur Herstellung eines Dampfsiebes |
| PCT/EP2017/067313 WO2018072895A1 (de) | 2016-10-20 | 2017-07-11 | Dampfsieb und verfahren zur herstellung eines dampfsiebes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3493889A1 true EP3493889A1 (de) | 2019-06-12 |
Family
ID=59384143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17742677.2A Withdrawn EP3493889A1 (de) | 2016-10-20 | 2017-07-11 | Dampfsieb und verfahren zur herstellung eines dampfsiebes |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3493889A1 (de) |
| DE (1) | DE102016220636A1 (de) |
| WO (1) | WO2018072895A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2714496A1 (de) * | 1977-03-31 | 1978-10-12 | Kraftwerk Union Ag | Siebkoerper zum abscheiden von feststoffen aus gasfoermigen medien |
| WO2013079283A1 (de) * | 2011-12-01 | 2013-06-06 | Siemens Aktiengesellschaft | Verfahren zum auslegen eines dampfsiebs und dampfventil mit dem dampfsieb |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5575618A (en) * | 1994-11-25 | 1996-11-19 | Brandon; Ronald E. | Steam turbine steam strainer |
| DE102009007240A1 (de) | 2009-02-03 | 2010-08-12 | Siemens Aktiengesellschaft | Dampfsieb sowie Verfahren zur Herstellung eines Dampfsiebes |
| DE102009029679A1 (de) * | 2009-09-22 | 2011-03-24 | Man Diesel & Turbo Se | Zylindrisches Dampfsieb |
| US20110162735A1 (en) * | 2010-01-04 | 2011-07-07 | General Electric Company | Flow guided steam strainer for steam turbine valves |
| EP2745909A1 (de) | 2012-12-20 | 2014-06-25 | Siemens Aktiengesellschaft | Dampfsieb |
-
2016
- 2016-10-20 DE DE102016220636.2A patent/DE102016220636A1/de not_active Ceased
-
2017
- 2017-07-11 EP EP17742677.2A patent/EP3493889A1/de not_active Withdrawn
- 2017-07-11 WO PCT/EP2017/067313 patent/WO2018072895A1/de not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2714496A1 (de) * | 1977-03-31 | 1978-10-12 | Kraftwerk Union Ag | Siebkoerper zum abscheiden von feststoffen aus gasfoermigen medien |
| WO2013079283A1 (de) * | 2011-12-01 | 2013-06-06 | Siemens Aktiengesellschaft | Verfahren zum auslegen eines dampfsiebs und dampfventil mit dem dampfsieb |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2018072895A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018072895A1 (de) | 2018-04-26 |
| DE102016220636A1 (de) | 2018-04-26 |
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