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
  • F01D5/02—Blade-carrying members, e.g. rotors
  • F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
  • F01D5/066—Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps
• • 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
  • F05D2260/31—Retaining bolts or nuts
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49316—Impeller making
  • Y10T29/49318—Repairing or disassembling
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49316—Impeller making
  • Y10T29/4932—Turbomachine making
  • Y10T29/49321—Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member

Definitions

• the invention relates to a rotor for an axially flow-through turbomachine, comprising a number of a plurality of disk-shaped or drum-shaped rotor components and at least one extending through the rotor components tie rod, at the protruding ends in each case an abutment for axially clamping the rotor components arranged therebetween is screwed.
• the invention relates to a method for assembling and releasing such a rotor.
• Such rotors are well known from the extensive existing state of the art to stationary gas turbines.
• the rotor is designed in a so-called disc design, the rotor disks on its outer periphery blades, either for the compressor or for the turbine unit
• a central hollow shaft as a drum-shaped component is arranged between the compressor disks and turbine disks.
• a central tension anchor extends through all the rotor components, the rotor components being arranged between these two hollow shafts with the aid of two counter bearings, the front hollow shaft and the rear hollow shaft
• the tie rod is elastically stretched to its yield point, whereby the individual rotor components are clamped together.
• a similar construction is also possible with decentralized tie rods, wherein lying on an equal radius, for example, twelve tie rods are arranged distributed equal. It is also known to weld the disc-shaped or drum-shaped rotor components together. Even combinations of the aforementioned embodiments, in which, for example, the compressor rotor is welded and the
• Rotor components of the turbine unit are clamped by a screw with bolts on the circumference, are also known.
• the object of the invention is to specify an alternative design of rotors for an axially flow-through turbomachine. Another object of the invention is to provide the method required for assembling and disassembling such a rotor.
• Rotor components called - clamped between a first abutment and a connecting means are screwed onto a tie rod until all of the first rotor components arranged therebetween are pressed firmly against one another by the two.
• those rotor components which are to be assigned to a second rotor section are then Generally referred to as second rotor components -, threaded on the tie rod connection side.
• a second abutment is screwed, with the help of the second rotor components and the first rotor components between the two abutments are braced.
• the tension then separates between the first thrust bearing and the connecting means, so that at the end of the assembly of the rotor, the connecting means is only slightly or no longer involved in any tensioning. All rotor components are then braced clamped by the two thrust bearings in conjunction with the tie rod.
• the process steps are then of course carried out in reverse order, so that first a second rotor section with second disc-shaped rotor components by loosening the screwed on the tie rod second abutment is relaxed to disassemble the braced disc-shaped rotor components comprehensive rotor of an axially flowable turbomachine, said meanwhile, the first disk-shaped rotor components of the first rotor section are clamped between the first counter bearing and a connecting means screwed onto the tie rod.
• the rotor comprises a number of disc-shaped or drum-shaped rotor components and at least one extending through the rotor components through tie rods, at its protruding ends in each case an abutment for axially clamping the rotor components arranged therebetween is screwed, wherein screwed between the two abutments a connecting means on the tie rod is, in such a way that after loosening one of the two abutment which are arranged between the connecting means and the other of the two abutment rotor components of the connecting means and the other abutment braced.
• the rotor comprises along its longitudinal extent a first rotor end section, at least one further rotor section and a second rotor end section, wherein the connecting means is arranged axially in one of the further rotor sections.
• the first rotor section defined for the method comprises the first rotor end section and the further rotor section, whereas the second rotor section corresponds to the second rotor end section.
• the connecting means and one of the rotor components are configured such that after loosening of the arranged on the second rotor end portion abutment means adjacent to the second rotor end portion connecting means with the arranged on the first rotor end abutment the intermediate rotor components with each other.
• a particular advantage of this embodiment is that, in a first assembly step, the rotor components threaded onto the first tie rod element can already be braced by one of the two counter bearings and the connecting means, although the rotor is not yet completely equipped with rotor components. Only then are the other disc-shaped or drum-shaped
• the tension which in the meantime acts on one part of the disk-shaped or drum-shaped rotor components from one of the two counter bearings and the connecting element, is thereby released again.
• the preliminary and final distortions are matched to one another in such a way that, with the final clamping of the rotor components between the two counter bearings, the initial tensioning of counter bearing and connecting element is at least partially, but preferably completely, released.
• the connecting means is designed as a nut.
• the connecting element is monolithically connected to the tie rod.
• the connecting means has a plurality of openings for the passage of a fluid from one of the rotor (end) sections to another of the rotor (end) sections.
• the respective connecting means has a circumferentially arranged circumferential shaft collar by the openings are arranged as passage openings for cooling fluid.
• the connecting means can also be used to realize a support of the tie rod to reduce vibrations during operation of the turbomachine.
• the connecting means can also be used to realize a support of the tie rod to reduce vibrations during operation of the turbomachine.
• the rotor is designed as a gas turbine rotor, the first rotor end portion as a compressor rotor, the further rotor portion as a central rotor portion and the second Rotorendab- cut as a turbine rotor.
• the central rotor section may be formed solely by a hollow shaft or by a plurality of blade-less rotor disks and the rotor end sections by rotor disks.
• the invention is based on embodiments in the
• FIG. 1 shows a partial longitudinal section through a rotor according to the invention for a stationary axial flow turbine engine
• Figure 2 shows a detail of the longitudinal section of FIG
• FIG. 3 shows the same section of Figure 2, according to an alternative embodiment
• Figure 4 shows a connecting element with a circumferentially arranged shaft collar
• FIG. 5 shows a perspective view of the connecting element according to FIG. 4 and FIG. 6 shows a connecting element radially supporting on the rotor component, in a longitudinal section according to FIG. 2.
• the rotor 10 is designed as a gas turbine rotor, wherein the remaining components of the gas turbine are not shown here.
• the design of the rotor 10 is fundamentally modular and can be described as a disk construction.
• the rotor 10 comprises a number of rotor disks 12, which are also referred to here as disc-shaped rotor components 14.
• the rotor 10 also includes a drum-shaped rotor component 16, which is referred to in the embodiment as a central hollow shaft 18.
• a front hollow shaft 22 screwed onto a tie rod 20 and a rear hollow shaft 24 screwed on the opposite end.
• the front hollow shaft 22 is also referred to here as the first counter bearing 26 and the rear hollow shaft 24 as the second counter bearing 28 ,
• the two abutments 26, 28 clamp with the help of the tie rod 20, the rotor components 14, 16 with each other and press them firmly together. To achieve this, the tie rod 20 of the two abutments 26, 28 stretched elastically.
• a connecting means 34 designed as a screw nut 35 is screwed on the tie rod 20 in the interior of the rotor 10 in order to clamp the rotor components 14, 16 arranged in a section of the rotor 10 during the assembly or disassembly of the rotor alone.
• the rotor 10 can theoretically be axially divided into a first rotor end section 38, into a further rotor section 40 and into a second rotor end section 42, wherein the
• Connecting means 34 is arranged axially seen in the other rotor section 40.
• the first rotor end section 38 is designed as a compressor rotor 44, and the second rotor end section 42 as a turbine rotor 48.
• a combustion chamber of the gas turbine is arranged radially outside the rotor 10.
• FIGS. 2 to 4 show a section from the transition region between the further rotor section 40 and the second rotor end section 42 in a longitudinal section.
• the nut 35 is screwed as a connecting means 34.
• Radially adjacent to the nut 35 the middle hollow shaft 18 is arranged.
• the nut 35 has a conical surface 50, whose pitch corresponds to an inwardly facing surface 52 of the central hollow shaft 18.
• a smaller shaft collar 54 is provided centrally between the two screw-in openings 37 of the nuts 35, the side surface 56 of which bears against a side surface 58 of the central hollow shaft 18 parallel thereto.
• the first abutment 26 is first screwed onto the tie rod 20 on the end side. Subsequently, this assembly is placed vertically, so that the individual disk-shaped or drum-shaped rotor components 14, 16 can be deposited from above onto the first counter-bearing 26. Subsequently, the screw nut 35 is screwed onto the still free end of the tie rod element 30 until the rotor components 14, 16 lying between the screw nut 35 and the first abutment 26 are clamped together. Subsequently, the rotor disks 12 provided for the turbine rotor 48 are threaded onto the turbine-side end of the tie rod 20 from above and laid down.
• the second abutment 28 is screwed onto the still free end of the tie rod 20.
• the entire tie rod 20 is elastically stretched so that the tension of the nut 35th or the connecting means 34 and the first abutment 26 dissolves again.
• axially extending holes 60 may be provided both in the central hollow shaft 18 and in the nut 35, with which a coolant from a rotor (end) section to another rotor (end) section can be passed.
• FIG. 3 shows the same section as FIG. 2, but with the construction for axial clamping in the region of FIG.
• Nut 35 and the central hollow shaft 18 is slightly modified compared to the construction of FIG 2. The required for the establishment of the axial tension radial overlap of nut 35 and middle
• Hollow shaft 18 takes place here using an interposed sleeve provided with a collar 62nd
• FIG. 4 shows a further exemplary embodiment for bracing the rotor components 14, 16 between a first counter bearing (not shown in FIG. 4) and the connecting means 34.
• the connecting means 34 is designed again as a screw nut 35 with two screw holes 37 located opposite one another.
• a larger shaft collar 54 is provided on the outer circumference, in which circumferentially uniformly distributed openings 64 are provided for the passage of a cooling fluid.
• the two parallel side surfaces 56 of the shaft collar 54 go over a radius in curved sloping edges 57, which end at the screw-37.
• This nut 35 with the screw-in opening 37 and four uniformly distributed passage openings 64 is shown in FIG 5 in perspective view.
• a circumferential groove 66 with a support wire 68 located therein may be provided on the shell-side surface of the shaft collar 54, with the aid of which the tie rod 20 itself radially on one of the rotor components, according to FIG 6 on the central hollow shaft 18, supported.
• FIGS. 2 to 6 mean that they show gas turbine rotors 10 in which the second counterbearing 28 has not yet been screwed onto the second tie rod element 32, so that only those to the left of the screw nut 35 in FIGS shown
• Rotor components 14, 16 are clamped to the first abutment 26 and the rotor components 14, 16 shown to the right thereof not.
• the invention thus relates to a rotor 10 for an axially flow-through turbomachine, comprising a number of several disk-shaped or drum-shaped
• connection means 34 is screwed onto the tie rod 20 between the two counter bearings 26, 28, by means of which

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Turbine Rotor Nozzle Sealing (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=49182221

Family Applications (2)

Family Applications Before (1)

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Citations (2)

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• 2013
  • 2013-09-06 IN IN890DEN2015 patent/IN2015DN00890A/en unknown
  • 2013-09-06 BR BR112015004983A patent/BR112015004983A2/pt not_active IP Right Cessation
  • 2013-09-06 BR BR112015004993A patent/BR112015004993A2/pt not_active IP Right Cessation
  • 2013-09-06 US US14/425,016 patent/US20150247406A1/en not_active Abandoned
  • 2013-09-06 JP JP2015530419A patent/JP2015528539A/ja active Pending
  • 2013-09-06 CA CA2884126A patent/CA2884126A1/en not_active Abandoned
  • 2013-09-06 EP EP13762773.3A patent/EP2880264A1/de not_active Withdrawn
  • 2013-09-06 WO PCT/EP2013/068507 patent/WO2014037523A1/de active Application Filing
  • 2013-09-06 KR KR1020157005723A patent/KR20150047509A/ko not_active Application Discontinuation
  • 2013-09-06 CN CN201380046776.0A patent/CN104619954B/zh not_active Expired - Fee Related
  • 2013-09-06 JP JP2015530418A patent/JP2015527534A/ja not_active Ceased
  • 2013-09-06 CN CN201380046855.1A patent/CN104603396B/zh not_active Expired - Fee Related
  • 2013-09-06 RU RU2015112596A patent/RU2015112596A/ru not_active Application Discontinuation
  • 2013-09-06 WO PCT/EP2013/068505 patent/WO2014037521A1/de active Application Filing
  • 2013-09-06 KR KR1020157005701A patent/KR20150047508A/ko not_active Application Discontinuation
  • 2013-09-06 MX MX2015002944A patent/MX2015002944A/es unknown
  • 2013-09-06 US US14/425,013 patent/US20150260044A1/en not_active Abandoned
  • 2013-09-06 RU RU2015109757A patent/RU2015109757A/ru not_active Application Discontinuation
  • 2013-09-06 CA CA2884133A patent/CA2884133A1/en not_active Abandoned
  • 2013-09-06 EP EP13763011.7A patent/EP2888448A1/de not_active Withdrawn
• 2015
  • 2015-02-16 IN IN1253DEN2015 patent/IN2015DN01253A/en unknown
  • 2015-03-04 SA SA515360111A patent/SA515360111B1/ar unknown
  • 2015-03-04 SA SA515360112A patent/SA515360112B1/ar unknown

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