CN109538303A - A kind of through-flow structure of modified steam turbine - Google Patents
A kind of through-flow structure of modified steam turbine Download PDFInfo
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- CN109538303A CN109538303A CN201910008493.6A CN201910008493A CN109538303A CN 109538303 A CN109538303 A CN 109538303A CN 201910008493 A CN201910008493 A CN 201910008493A CN 109538303 A CN109538303 A CN 109538303A
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- leading edge
- packing
- pressure
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- 238000003754 machining Methods 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 10
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 9
- 238000005452 bending Methods 0.000 claims abstract description 4
- 238000012856 packing Methods 0.000 claims description 35
- 230000001413 cellular effect Effects 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 12
- 210000004907 gland Anatomy 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 7
- 230000003628 erosive effect Effects 0.000 abstract description 7
- 230000005494 condensation Effects 0.000 abstract description 3
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- 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
-
- 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
-
- 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
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
-
- 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
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
-
- 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
- F01D5/12—Blades
- F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
-
- 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
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/286—Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion
-
- 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
-
- 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
- F01D5/3053—Fixing blades to rotors; Blade roots ; Blade spacers by means of pins
-
- 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
- F01D7/00—Rotors with blades adjustable in operation; Control thereof
-
- 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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
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- 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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
-
- 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
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a kind of through-flow structures of modified steam turbine, the blade of each pressure stage is blade of variable cross-section of the molded line along leaf High variation, it is different with the bending direction of the blade root at the top of blade, the balance blade profile that the blade profile of the blade loads after being, blade molded line is the curve that the continuous and derivable of high-order changes, the leading edge radius of the blade is smaller, it is integrated at the top of the movable vane piece with shroud, the shroud of last stage pressure grade has machining gap with the leading edge junction of movable vane piece, the leading edge machining gap is on the extension line of the leading edge, alloy welding deposit layer is designed with the leading edge on the inside of the machining gap.The present invention extends the service life of blade and shroud, reduces the influence of water erosion effect, also improves transformation efficiency, avoid adverse effect caused by steam condensation.
Description
Technical field
The present invention relates to steam turbine fields, and in particular to a kind of through-flow structure of modified steam turbine.
Background technique
In the design, in order to reduce dynamic stress when movable vane piece work, Long Turbine Blades are designing modern flow passage component
In all use integral (tip) shroud structure.With the reduction of pressure and temperature, the water in the three-level runner of turbine low pressure cylinder end steams
Gas can be changed into moist steam from dry saturated steam, and especially in low-pressure final stage, the humidity of vapor can reach 10%, in blade leading edge
Top and shroud junction will form corrosion cracking, and then shroud is caused to be broken, influenced unit due to washing away for a long time for water droplet
Safety.Therefore the structure for rationally designing leaf top leading edge and shroud junction, the safety fortune of anti-water erosion and unit to linear leaf
Row is most important.
Additionally due to Water vapor condensation can reduce steam pressure, therefore through-flow structure also needs to improve efficiency at different levels, keeps away
Exempt from power loss, guarantees the power of steam turbine.
Summary of the invention
The purpose of the present invention is to provide a kind of through-flow structure of modified steam turbine, with solve in the prior art due to
Water vapor condensation is converted into the problem of water erosion caused by moist steam and power reduction.
The through-flow structure of the modified steam turbine, including high pressure flow part, middle pressure flow passage component and low pressure are logical
Stream part, the high pressure flow part include governing stage and several pressure stages, medium pressure flow passage component and the low pressure flow passage
Part has separately included several pressure stages, and each pressure stage includes partition, blade, shroud, and the blade includes being connected to cylinder
Stator blade on body and the movable vane piece being connected on rotor, the blade of each pressure stage is variable cross-section leaf of the molded line along leaf High variation
Piece, blade top, balance blade profile that the blade profile of the blade be after load different with the bending direction of the blade root, blade molded line
For the curve that the continuous and derivable of high-order changes, the leading edge radius of the blade is smaller, is with shroud at the top of the movable vane piece
The shroud of integral structure, last stage pressure grade has machining gap with the leading edge junction of movable vane piece, and the leading edge adds
Work notch is designed with alloy welding deposit layer with the leading edge on the inside of the machining gap on the extension line of the leading edge.
Preferably, the trailing edge two sides of the movable vane piece of the last stage pressure grade are designed with diversion trench, set on corresponding shroud
There is rhone corresponding with the diversion trench, is designed with alloy welding deposit layer on the inside of the rhone and the diversion trench.
Preferably, the stationary blade carrier for installing the stator blade is equipped on the inside of cylinder body, the shroud lower surface is inclined-plane, towards into
Gas direction is higher than opposite another side on one side, is equipped with shroud packing at the top of the shroud between the stationary blade carrier, described quiet
Blade lower end and partition are integrally formed, and are equipped with diaphragm gland between the partition and the rotor, the shroud packing and described
Diaphragm gland is honeycomb type packing.
Preferably, the honeycomb type packing includes labyrinth casing, packing loose piece, comb teeth, cellular board and makes a concession spring, the vapour
Envelope body is mounted on the partition or the shroud, and the labyrinth casing bottom surface is equipped with packing slot, is equipped with above the packing loose piece
The shoulder portion being slidably connected in the packing slot is connected with described move back between the shoulder portion and packing groove top portion
Allow spring, packing loose piece bottom surface is equipped with several cellular boards comb teeth different with several height, and the cellular board is located at edge
Between embedding comb teeth.
Preferably, the blade root of the high pressure flow part and medium pressure flow passage component is double-T shaped blade root, described double
The inner side section of T-type blade root is equipped with locking member, and the blade root is fixed by locking member riveting.
Preferably, the blade of the governing stage is that the trident three of impulse sells triplet blade construction, the governing stage
The blade root of blade is trident blade root, and the rotor is equipped with the trident mounting groove mating with the trident blade root, institute
Trident blade root is stated to fix by the fixed pin that side is inserted into.
The present invention has the advantage that the design by blade line style and blade of variable cross-section improves the efficiency of blade, blade
Root and top design be it is curved to different directions, be also distributed just the pressure of Ye Daonei and along leaf Gao Fangxiang form one
The pressure at kind blade root and top is higher than the case where middle part pressure, is pressed during steam flowing under such circumstances
Power influence can be flowed towards the position in leaf, and the boundary layer of position just becomes weak at the top of blade root and leaf, to effectively reduce two
Secondary stream loss.The curve of the efficient leaf suction surface and pressure face that load afterwards is not arc-shaped, is mainly showed a kind of high
The curve of the continuous and derivable variation of rank, has good Streamline Design, therefore, a wide range of direction change occurs in steam incoming flow
When, still have the effect of good reduction cascade loss.In addition, leaf thickness is loaded afterwards than traditional fixed blade for steam turbine
Greatly, therefore intensity also greatly improves.
Shroud is integrated with blade, caused by vibration it is smaller, and there is no riveting situation caused by blade stress collection
Middle problem, but be easy that shroud is enabled to be influenced by water erosion, by being arranged machining gap, when manufacture, can be along blade leading edge until processing lacks
Oral area, which sets up separately, sets alloy welding deposit layer, processes more convenient, and the droplet condensed on blade can also be passed through machining gap by when operation
It throws away, and the rhone on the diversion trench and shroud of blade outlet can also play the role of collecting blade surface droplet and throw away,
Reduce the influence of water erosion effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of mesolow flow passage component of the present invention；
Fig. 2 is the structural schematic diagram of the blade of last stage pressure grade in the present invention；
Fig. 3 is the structural schematic diagram at another visual angle of structure shown in Fig. 2；
Fig. 4 is the cross-sectional view of structure shown in Fig. 2；
Fig. 5 is the structural schematic diagram of honeycomb type packing in the present invention；
Fig. 6 is structural schematic diagram of the mesohigh flow passage component of the present invention in governing stage part；
Fig. 7 is the structural schematic diagram of the coupling part of the blade of governing stage in the present invention.
In above-mentioned attached drawing, 1, blade, 2, rotor, 3, the movable vane piece of last stage pressure grade, 31, blade, 311, diversion trench, 312,
Leading edge, 32, shroud, 321, machining gap, 322, rhone, 33, blade root, 4, honeycomb type packing, 41, labyrinth casing, 42, packing
Loose piece, 43, comb teeth, 44, cellular board, 5, cylinder body, 6, nozzle sets, 7, the blade of governing stage, 71, fixed pin.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making further details of theory to the specific embodiment of the invention
It is bright, to help those skilled in the art to have more complete, accurate and deep reason to inventive concept of the invention, technical solution
Solution.
Embodiment 1:
As shown in figs. 1-7, the present invention provides a kind of through-flow structure of modified steam turbine, including high pressure are logical
Stream part, middle pressure flow passage component and low pressure flow passage part, the high pressure flow part include governing stage and several pressure stages, described
Middle pressure flow passage component and the low pressure flow passage part have separately included several pressure stages, and each pressure stage includes partition, blade
1, shroud 32, the blade 1 include the stator blade being connected on cylinder body 5 and the movable vane piece being connected on rotor 2.
The blade 1 of each pressure stage is blade of variable cross-section of the molded line along leaf High variation, 31 top of blade and the blade root 33
Bending direction is different, the balance blade profile that the blade profile of the blade 1 loads after being, 31 molded line of blade is that the continuous and derivable of high-order changes
Curve, 312 radius of leading edge of the blade 31 is smaller, and 1 top of the movable vane piece is integrated with shroud 32, last
The shroud 32 of stage pressure grade has machining gap 321 with 312 junction of leading edge of movable vane piece, and the leading edge 312 is processed
For notch 321 on the extension line of the leading edge 312,321 inside of machining gap is designed with alloy with the leading edge 312
Overlay cladding.
The trailing edge two sides of the movable vane piece 3 of the last stage pressure grade are designed with diversion trench 311, and corresponding shroud 32 is equipped with
Rhone 322 corresponding with the diversion trench 311 is designed with alloy welding deposit on the inside of the rhone 322 and the diversion trench 311
Layer.
The stationary blade carrier for installing the stator blade is equipped on the inside of cylinder body 5,32 lower surface of shroud is inclined-plane, towards air inlet side
It is higher than opposite another side to one side, is equipped with shroud packing, the stator blade between 32 top of shroud and the stationary blade carrier
Piece lower end and partition are integrally formed, and are equipped with diaphragm gland between the partition and the rotor 2, the shroud packing and it is described every
Plate packing is honeycomb type packing 4.
The honeycomb type packing 4 includes labyrinth casing 41, packing loose piece 42, comb teeth 43, cellular board 44 and makes a concession spring, described
Labyrinth casing 41 is mounted on the partition or the shroud 32, and 41 bottom surface of labyrinth casing is equipped with packing slot, the packing loose piece
42 are equipped with the shoulder portion being slidably connected in the packing slot above, connect between the shoulder portion and packing groove top portion
It is connected to the yielding spring, 42 bottom surface of packing loose piece is equipped with several cellular boards 44 comb teeth 43 different with several height,
The cellular board 44, which is located at, to be inlayed between comb teeth 43.
Wherein 44 bottom of cellular board is inclination towards the inclined-plane of airintake direction, and 2 part of rotor has opposite with cellular board 44
The protrusion answered, raised top are the inclined-planes matched with 44 bottom of cellular board, can improve the air-tightness of packing in this way, subtract
Small steam improves the mechanical efficiency of blade 1 from the leakage of gland compartment.
The blade root 33 of the high pressure flow part and medium pressure flow passage component is double-T shaped blade root, the double-T shaped leaf
The inner side section of root is equipped with locking member, and the blade root 33 is fixed by locking member riveting.It installs so relatively reliable secured.
The blade 7 of the governing stage is that the trident three of impulse sells triplet blade construction, 7, the blade of the governing stage
Portion is trident blade root, and the rotor 2 is equipped with the trident mounting groove mating with the trident blade root, the trident
Blade root is fixed by the fixed pin 71 that side is inserted into.It is able to bear the high steam of the ejection of nozzle sets 6, and installation side in this way
Just.
The present invention is, Ye Jiushiye road curved to different directions in the root of the out-of-date blade 1 of steam stream and top design
The case where pressure that interior pressure distribution forms a kind of blade root and top along leaf Gao Fangxiang is higher than middle part pressure,
The influence that is under pressure during steam flowing under such environment can be flowed towards the position in leaf, position at the top of blade root 33 and leaf
Boundary layer just becomes weak, to effectively reduce secondary flow loss.The efficient leaf suction surface and pressure face loaded afterwards
Curve be not arc-shaped, mainly show a kind of curve of the continuous and derivable variation of high-order, there is good Streamline Design, because
This still has the effect of good reduction cascade loss when a wide range of direction change occurs for steam incoming flow.
On the other hand, machining gap 321 is arranged in shroud 32, can be along 1 leading edge 312 of blade until machining gap when manufacture
Alloy welding deposit layer is arranged in 321 parts, processes more convenient, and alloy welding deposit layer, which allows, is easy the leading edge 312 that is influenced by water erosion more
Add corrosion-resistant, extend the service life of equipment, the droplet condensed on blade 1 can also be passed through machining gap 321 by when operation
It throws away, and the rhone 322 on the diversion trench 311 and shroud 32 of 1 outlet edge of blade can also play and collect 1 surface water drops of blade and get rid of
Effect out reduces the influence of water erosion effect.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as using the improvement for the various unsubstantialities that inventive concept of the invention and technical solution carry out, or without changing
Other occasions are directly applied to by present inventive concept and technical solution, within that scope of the present invention.
Claims (6)
1. a kind of through-flow structure of modified steam turbine, including high pressure flow part, middle pressure flow passage component and low pressure flow passage portion
Point, the high pressure flow part includes governing stage and several pressure stages, medium pressure flow passage component and the low pressure flow passage part
Several pressure stages are separately included, each pressure stage includes partition, blade (1), shroud (32), and the blade (1) includes connecting
Connect on cylinder body (5) stator blade and the movable vane piece that is connected on rotor (1), it is characterised in that: the blade (1) of each pressure stage is
Blade of variable cross-section of the molded line along leaf High variation, blade (31) top, the blade different with the bending direction of the blade root (33)
(1) the balance blade profile that blade profile loads after being, blade (31) molded line are the curve that the continuous and derivable of high-order changes, the blade
(31) leading edge (312) radius is smaller, is integrated at the top of the movable vane piece (1) with shroud (32), last stage pressure
The shroud (32) of grade has machining gap (321) with the leading edge of movable vane piece (312) junction, and the leading edge (312) adds
Work notch (321) is on the extension line of the leading edge (312), machining gap (321) inside and the leading edge (312)
It is designed with alloy welding deposit layer.
2. a kind of through-flow structure of modified steam turbine according to claim 1, it is characterised in that: the last stage pressure
The trailing edge two sides of the movable vane piece (3) of grade are designed with diversion trench (311), and corresponding shroud (32) is equipped with and the diversion trench
(311) alloy welding deposit layer is designed on the inside of corresponding rhone (322), the rhone (322) and the diversion trench (311).
3. a kind of through-flow structure of modified steam turbine according to claim 1 or 2, it is characterised in that: in cylinder body (5)
Side is equipped with the stationary blade carrier for installing the stator blade, and shroud (32) lower surface is inclined-plane, is higher than phase on one side towards airintake direction
Pair another side, shroud (32) packing, the stator blade lower end are equipped between the stationary blade carrier at the top of the shroud (32)
Be integrally formed with partition, equipped with diaphragm gland between the partition and the rotor (1), shroud (32) packing and it is described every
Plate packing is honeycomb type packing (4).
4. a kind of through-flow structure of modified steam turbine according to claim 3, it is characterised in that: the honeycomb type vapour
Envelope (4) includes labyrinth casing (41), packing loose piece (42), comb teeth (43), cellular board (44) and makes a concession spring, the labyrinth casing (41)
It is mounted on the partition or the shroud (32), labyrinth casing (41) bottom surface is equipped with packing slot, the packing loose piece (42)
It is equipped with the shoulder portion being slidably connected in the packing slot above, is connected between the shoulder portion and packing groove top portion
There is the yielding spring, packing loose piece (42) bottom surface is equipped with several cellular boards (44) comb teeth different with several height
(43), the cellular board (44) is located at and inlays between comb teeth (43).
5. a kind of through-flow structure of modified steam turbine according to claim 1 or 2, it is characterised in that: the high pressure
The blade root (33) of flow passage component and medium pressure flow passage component is double-T shaped blade root, and the double-T shaped inner side section of blade root is set
There is locking member, the blade root (33) is fixed by locking member riveting.
6. a kind of through-flow structure of modified steam turbine according to claim 1 or 2, it is characterised in that: the adjusting
The blade (7) of grade is that the trident three of impulse sells triplet blade construction, and the blade root (3) of the blade (7) of the governing stage is three
Fork type blade root, the rotor (1) are equipped with the trident mounting groove mating with the trident blade root, the trident blade root
The fixed pin (71) being inserted by side is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910008493.6A CN109538303A (en) | 2019-01-04 | 2019-01-04 | A kind of through-flow structure of modified steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910008493.6A CN109538303A (en) | 2019-01-04 | 2019-01-04 | A kind of through-flow structure of modified steam turbine |
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| Publication Number | Publication Date |
|---|---|
| CN109538303A true CN109538303A (en) | 2019-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910008493.6A Pending CN109538303A (en) | 2019-01-04 | 2019-01-04 | A kind of through-flow structure of modified steam turbine |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203374329U (en) * | 2013-05-24 | 2014-01-01 | 华电国际电力股份有限公司山东分公司 | Low pressure through-flow structure |
| CN103806955A (en) * | 2014-02-25 | 2014-05-21 | 华电国际电力股份有限公司山东分公司 | Through-flow structure of steam turbine |
| CN206360729U (en) * | 2016-12-27 | 2017-07-28 | 成都爱迪电力设备有限公司 | A kind of inclined honeycomb steam seal |
| CN209324433U (en) * | 2019-01-04 | 2019-08-30 | 安徽誉特双节能技术有限公司 | A kind of through-flow structure of modified steam turbine |
-
2019
- 2019-01-04 CN CN201910008493.6A patent/CN109538303A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203374329U (en) * | 2013-05-24 | 2014-01-01 | 华电国际电力股份有限公司山东分公司 | Low pressure through-flow structure |
| CN103806955A (en) * | 2014-02-25 | 2014-05-21 | 华电国际电力股份有限公司山东分公司 | Through-flow structure of steam turbine |
| CN206360729U (en) * | 2016-12-27 | 2017-07-28 | 成都爱迪电力设备有限公司 | A kind of inclined honeycomb steam seal |
| CN209324433U (en) * | 2019-01-04 | 2019-08-30 | 安徽誉特双节能技术有限公司 | A kind of through-flow structure of modified steam turbine |
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