EP3172409A1 - Wheel disk assembly having sealing plates - Google Patents
Wheel disk assembly having sealing platesInfo
- Publication number
- EP3172409A1 EP3172409A1 EP15778938.9A EP15778938A EP3172409A1 EP 3172409 A1 EP3172409 A1 EP 3172409A1 EP 15778938 A EP15778938 A EP 15778938A EP 3172409 A1 EP3172409 A1 EP 3172409A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wheel disc
- sealing plates
- bolts
- bore
- wheel disk
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 44
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000000717 retained effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
- F01D5/3015—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type with side plates
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/005—Sealing means between non relatively rotating elements
- F01D11/006—Sealing the gap between rotor blades or blades and rotor
-
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/32—Locking, e.g. by final locking blades or keys
- F01D5/323—Locking of axial insertion type blades by means of a key or the like parallel to the axis of the rotor
-
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/32—Locking, e.g. by final locking blades or keys
- F01D5/326—Locking of axial insertion type blades by other means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/60—Assembly methods
- F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/30—Retaining components in desired mutual position
- F05D2260/37—Retaining components in desired mutual position by a press fit connection
Definitions
- the present invention relates to a wheel disc assembly comprising a wheel disc, a plurality of vane means secured along an outer periphery of the wheel disc, a plurality of sealing sheets slidably received circumferentially between the wheel disc and the vane means, and securing means formed to receive the sealing sheets secure against displacement in the circumferential direction, being provided as securing means bolts, which are releasably held in arranged in the wheel disc holes and engage in recesses which are formed on the wheel disc facing surfaces of the sealing plates.
- Wheel disc assemblies of the type mentioned are known in the art. They form components of rotors, such as gas turbines or the like. Usually a plurality of sealing plates are received displaceably in the circumferential direction ⁇ bar between the wheel disc and the blade means. Thus, the sealing plates, for example, in radially spaced from each other arranged annular grooves are ⁇ sets to be on the one hand and on the wheel
- Bucket devices on the other hand are formed.
- Such securing means may be formed for example by a through a sealing plate provided in the through hole extending screw and provided on the wheel disc threaded bore into which the screw is screwed in the destination ⁇ according to the mounted state.
- a problem of such a trained safety device is that with the provided in the wheel disc Tapping effect associated with negatively impact on the strength of the wheel disc and can cause corresponding problems.
- screws can often no longer be loosened in case of doubt, which entails time-consuming boring of the screw connection, as a result of which the expensive wheel disc is damaged.
- the US 3,070,351 a Siche ⁇ approximately ring for fitting in axial grooves blades of a compressor.
- the clamping sleeves are located in aligned bores, which are provided on the one hand in the paddle wheel and on the other hand ⁇ in the locking ring.
- the seat of the clamping sleeves is not further secured, so that a loss of the clamping sleeves is possible.
- the present invention provides a wheel disc assembly of the type mentioned above, which is characterized in that for manually releasing the engagement of the respective bolt from the associated recess, the relevant bolt resiliently in the bore further
- the pins are configured such that they supportingly resiliently to press it in its final assembly position at the hole bottom of the Radschei ⁇ be facing surfaces of the sealing plates. This ensures a play-free and thus low-wear seat of the bolt in the recess of the sealing plate.
- the hole can be designed thread-free, so that the strength of the wheel disc is not reduced by the notch effect of threads.
- the bore has a substantially hemispherical bore bottom. Accordingly, there is a transition radius between the bore and the bottom of the hole, which also prevents unnecessary weakening of the wheel disc.
- the bolts on their end facing the wheel disc ⁇ th at least one, preferably two spring legs, which engage in the associated bore. Thanks to this one-piece construction, the bolts can be easily and repeatedly assembled and disassembled. A separate spring is not required according to this preferred embodiment, which simplifies the assembly.
- the spring legs are advantageously oppositely arranged ⁇ , advertising achieved thereby clamping forces acting evenly to.
- the bolts on their end face facing the wheel disc at least one radially outwardly projecting projection as an investment for an associated sealing plate.
- the at least one projection is advantageously formed from annular ⁇ , which is particularly advantageous in relation to the production of the bolt.
- the recesses formed on the sealing plates are formed as through holes. This is on the one hand from a production ⁇ technical point of view of advantage. On the other hand, the bolts can be more easily inserted into the associated recesses, as they are visible through the through holes from the outside.
- the formed on the sealing sheets recesses as radially extending elongated holes are trained det, advantageous to be able to compensate for thermal expansion during the intended use of the wheel ⁇ disc assembly.
- Figure 1 is a schematic perspective view of a
- Figure 2 is a schematic sectional view showing a Siche ⁇ tion device of the wheel disc shown in Figure 1;
- Figure 3 is a schematic perspective view of a
- FIG. 4 shows an enlarged view of a recess formed in the sealing sheet shown in FIG. 3; and Figure 5 is a schematic perspective view of a
- FIGs 1 to 5 show a wheel disc assembly 1 according to an embodiment of the present invention or components thereof.
- the wheel disc assembly 1 comprises a wheel disc 2, a plurality of blade devices 3, which are fastened along an outer circumference of the wheel disc 2, and a plurality of sealing plates 4, which extend between the wheel disc 2 and the blade devices 3 and are received displaceably in the circumferential direction U. More precisely, the sealing plates 4 are inserted in annular grooves which are arranged spaced from each other in the radial direction R, wherein the annular grooves on the wheel disc 2 on the one hand and on the blade ⁇ devices 3 on the other hand are formed.
- the wheel disc assembly 1 comprises a plurality of securing devices 5, in the present case a safety device 5 per sealing plate 4.
- Each safety device 5 has a bolt 6, which is fastened to the wheel disc 2 and into one Recess 7 engages, which is formed on the wheel disc 2 to ⁇ facing surface of each sealing plate 4.
- the bolts 6 are releasably clamped in unthreaded bores 8 of the wheel disc 2, wherein each bore 8 has a substantially hemispherical bore bottom formed.
- the bolts 6 have, at their the wheel disc 2 supplied ⁇ end region toward two mutually oppositely disposed spring legs 9, which mounted in intended to ⁇ was under exercise rest, as shown in Figure 2 a clamping force on the wall of the bore. 8 End region facing away from the wheel disc 2, the pin 8 has a radially outwardly projecting protrusion 10, which is pre-formed overlying annular and serves as a support for a child to ⁇ sealing plate. 4 At the same time acts the pre ⁇ crack 10 as a spacer and defines a predetermined distance between the wheel disc 2 and the corresponding Sealing plate 4.
- the formed on the sealing plates 4 recesses 7 are provided as through holes, more specifically as a continuous and radially extending slots, so that the bolt 6 in the radial direction R remains a play, especially in the radial outward direction.
- the wheel disc assembly 1 is characterized in particular by the fact that the bolts 6 can be easily assembled and disassembled thanks to the spring legs 9. While in the assembly of the first bolt 6 is so deeply immersed in the bore, that then a sealing plate can be moved past its end, it is for disassembly of the bolt 6 also dive into the bore 8 to the engagement of the bolt 6 with the recess 7 to solve and thus to allow a displacement of the sealing plate in the circumferential direction.
- the spring action of the bolt 6 is directed so that the bolt moves out of its bore at least partially, as soon as the ⁇ ser is released.
- the bore 8 is formed thread-free, so that the strength of the wheel disc 2 is not unnecessarily affected by notch effect. Also, the substantially hemispherical bore reason is conducive to strength. Thanks to the projection 10 a defined position of the sealing plates 4 is ensured in beticiansge ⁇ according mounted state. The formation of the off ⁇ recesses 7 as a radially extending and continuous slots, which leave the bolt 6 in the radial direction of a motion play, enables compensation of heat ⁇ expansions of the sealing plates 4 during the normal operation of the Radusionnan angel. 1
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14191066.1A EP3015655A1 (en) | 2014-10-30 | 2014-10-30 | Wheel disc assembly with seal plates |
PCT/EP2015/073548 WO2016066412A1 (en) | 2014-10-30 | 2015-10-12 | Wheel disk assembly having sealing plates |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3172409A1 true EP3172409A1 (en) | 2017-05-31 |
EP3172409B1 EP3172409B1 (en) | 2021-02-17 |
Family
ID=51845311
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14191066.1A Withdrawn EP3015655A1 (en) | 2014-10-30 | 2014-10-30 | Wheel disc assembly with seal plates |
EP15778938.9A Active EP3172409B1 (en) | 2014-10-30 | 2015-10-12 | Wheel disk assembly having sealing plates |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14191066.1A Withdrawn EP3015655A1 (en) | 2014-10-30 | 2014-10-30 | Wheel disc assembly with seal plates |
Country Status (4)
Country | Link |
---|---|
US (1) | US10337338B2 (en) |
EP (2) | EP3015655A1 (en) |
CN (1) | CN208594970U (en) |
WO (1) | WO2016066412A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2975219A1 (en) * | 2014-07-17 | 2016-01-20 | Siemens Aktiengesellschaft | Wheel disc assembly |
DE102020200073A1 (en) * | 2020-01-07 | 2021-07-08 | Siemens Aktiengesellschaft | Guide vane ring |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3070351A (en) * | 1959-02-06 | 1962-12-25 | Gen Motors Corp | Blade retention |
US8206119B2 (en) * | 2009-02-05 | 2012-06-26 | General Electric Company | Turbine coverplate systems |
US9145909B2 (en) * | 2011-04-27 | 2015-09-29 | Illinois Tool Works Inc. | Reusable press-in retainer |
-
2014
- 2014-10-30 EP EP14191066.1A patent/EP3015655A1/en not_active Withdrawn
-
2015
- 2015-10-12 CN CN201590000975.2U patent/CN208594970U/en active Active
- 2015-10-12 WO PCT/EP2015/073548 patent/WO2016066412A1/en active Application Filing
- 2015-10-12 US US15/519,733 patent/US10337338B2/en active Active
- 2015-10-12 EP EP15778938.9A patent/EP3172409B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
US10337338B2 (en) | 2019-07-02 |
US20170241276A1 (en) | 2017-08-24 |
EP3172409B1 (en) | 2021-02-17 |
EP3015655A1 (en) | 2016-05-04 |
CN208594970U (en) | 2019-03-12 |
WO2016066412A1 (en) | 2016-05-06 |
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