CN109209517A - A kind of second level stator blade ring assemblies that flue gas turbine expander adaptively thermally expands - Google Patents
A kind of second level stator blade ring assemblies that flue gas turbine expander adaptively thermally expands Download PDFInfo
- Publication number
- CN109209517A CN109209517A CN201811032252.7A CN201811032252A CN109209517A CN 109209517 A CN109209517 A CN 109209517A CN 201811032252 A CN201811032252 A CN 201811032252A CN 109209517 A CN109209517 A CN 109209517A
- Authority
- CN
- China
- Prior art keywords
- stator blade
- level
- level stator
- ring assemblies
- flue gas
- 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.)
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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
- 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
-
- 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
- F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
Abstract
The invention discloses a kind of second level stator blade ring assemblies that flue gas turbine expander adaptively thermally expands, and are mounted between the level-one stator blade ring assemblies of flue gas turbine expander and exhaust casing diffusion device assembly；The second level stator blade ring assemblies include second level stator blade fixed ring, second level stator blade, obturage ring assemblies and obturage piece, and one end of second level stator blade fixed ring is fixedly connected with exhaust casing diffusion device assembly, and the other end is connect with level-one stator blade ring assemblies phase free wxpansion；Circumferential T-slot is used inside second level stator blade fixed ring, second level stator blade outer rim T-type plate is mounted in the annular groove of second level stator blade fixed ring, circumferentially installs positioning pin using a radial pin hole every several blades with fixation；The inner platform of second level stator blade will be obturaged ring assemblies and be fixed on lug using two layers of lug with through-hole, obturages and obturages piece using circumferential on ring assemblies, obturages piece and match with wheel disc.Present invention installation second level stator blade, forms airflow channel, and completion can be converted in amount.
Description
Technical field
The present invention relates to a kind of second level stator blade ring assemblies that flue gas turbine expander adaptively thermally expands, and apply in petrochemical industry row
On the device of industry catalytic cracking waste heat Energy recovery machine set.
Background technique
Widely applied flue gas turbine expander is entire on petrochemical industry catalytic cracking waste heat Energy recovery machine set at present
The core apparatus of unit, second level stator blade ring assemblies are an important components, convert the partial heat energy of the flue gas stream by it to
Kinetic energy has the function that energy regenerating.Second level stator blade ring assemblies are among the encirclement of flue gas stream, and flue-gas temperature is high and is distributed not
, the ablation of blade is easily led to；Simultaneously containing oxidants and catalyst granules such as sulphur in flue gas, biggish corruption is generated to blade
Erosion effect, is also easy to produce crackle chip off-falling etc.；When work, thermal stress, vibration stress etc. are still suffered from.In this way during repairing, need
The blade for decomposing disassembly damage, is replaced.It is welded in the prior art using second level stator blade with second level stator blade fixed ring, and two
Grade stator blade fixed ring and level-one stator blade fixed ring are the mode of whole fixed ring, although having, structure is simple, easy to assembly, stability
It is good, connect reliable feature.But the blade damaged to frequent disassembling, assembling and replacing brings difficulty, when reassembling again, due to whole solid
The deformation for determining ring leads to whole fixed ring and rotor decentraction, turns gap between stator, obturages part gap etc. to change, sternly
The vibration and load that rotor is influenced when weight, directly affect safe and reliable, the steady operation of flue gas turbine expander.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of second levels that flue gas turbine expander adaptively thermally expands
Stator blade ring assemblies form airflow channel to install second level stator blade, complete energy conversion.
The present invention adopts the following technical scheme that realize:
A kind of second level stator blade ring assemblies that flue gas turbine expander adaptively thermally expands, the second level stator blade ring assemblies are for being mounted on cigarette
Between the level-one stator blade ring assemblies and exhaust casing diffusion device assembly of gas-turbine；Wherein,
The second level stator blade ring assemblies are that one end is clamped, the other end be can free wxpansion cantilevered support structure, including second level
Stator blade fixed ring, second level stator blade obturage ring assemblies and obturage piece, the Z-shaped structure of second level stator blade fixed ring, one end and exit casing
Body diffusion device assembly is fixedly connected, and the other end is connect with level-one stator blade ring assemblies phase free wxpansion；
Circumferential T-slot is used inside second level stator blade fixed ring, second level stator blade outer rim T-type plate is mounted in second level
In the annular groove of stator blade fixed ring, positioning pin is circumferentially installed to fix two using a radial pin hole every several blades
Grade stator blade；The inner platform of second level stator blade will be obturaged ring assemblies using conical head rivet and be consolidated using two layers of lug with through-hole
It is scheduled on lug, obturages and obturage piece using circumferential on ring assemblies, obturage piece and matched with wheel disc, play interstage air
Sealing function.
A further improvement of the present invention lies in that the second level stator blade ring assemblies pass through hex screw and exhaust casing diffuser group
Part links together.
A further improvement of the present invention lies in that preventing its loosening using fixing screws come fixed locating stud.
A further improvement of the present invention lies in that second level stator blade fixed ring front is Z-type structure, with level-one stator blade ring assemblies
Similar structure cooperation, radially, axial there are certain gaps.
A further improvement of the present invention lies in that second level stator blade fixed ring has the variable quantity of 1mm along axial direction, radially there is 3mm
Variable quantity.
A further improvement of the present invention lies in that second level stator blade fixed ring is formed using ring forging is machined.
A further improvement of the present invention lies in that second level stator blade fixed ring includes that second level stator blade fixed ring lower half and second level are quiet
The leaf fixed ring upper half, and the horizontal split split in the second level stator blade fixed ring upper half and second level stator blade fixed ring lower half uses
Side connection type is installed, using positioning finger setting, installation side is machined with through-hole respectively, and uses hexagon-headed bolt, six on installation side
Angle nut is connected with locking plate, internal to form the type face with certain angle, constitutes airflow channel with second level stator blade.
A further improvement of the present invention lies in that after second level stator blade fixed ring install side on using four be uniformly distributed along the circumference open
Mouth keyway, is connected, for fixing second level stator blade fixed ring and adjusting its week with the retainingf key in exhaust casing diffusion device assembly
To, radial position, it is ensured that second level stator blade fixed ring is concentric with rotor, turns gap between stator, obturages part gap and meet the requirements.
The present invention has following beneficial technical effect:
The second level stator blade ring assemblies that a kind of flue gas turbine expander provided by the invention adaptively thermally expands, when flue gas turbine expander works,
Second level stator blade ring assemblies are among the encirclement of flue gas stream, and flue-gas temperature is high and is unevenly distributed, and the corruption such as sulphur, catalyst are contained in flue gas
Corrosion, Oxidant when work, still suffer from thermal stress, vibration stress etc., and second level stator blade fixed ring is easily made to generate larger change
Shape, blade cracks, ablation, chip off-falling etc..
Blade cracks, ablation, chip off-falling, needs continually to be replaced, second level stator blade and second level stator blade fixed ring
It is welded, increases decomposition replacement difficulty, the fixed annular strain of second level stator blade is larger, can generate biggish deformation axial, radial, give
Installation and debugging bring larger difficulty.And will lead to second level stator blade fixed ring and rotor decentraction, turn gap between stator blade, envelope
Tight part gap etc. changes, and reduces the working efficiency of unit, and the vibration and load of rotor are influenced when serious, directly affects flue gas
Safe and reliable, the steady operation of turbine.
The second level stator blade ring assemblies provided by the invention adaptively thermally expanded, second level stator blade ring assemblies are that one end is clamped, one
End can free wxpansion cantilevered support structure.When repairing is re-started and is reassembled, the opening keyway being uniformly distributed along the circumference using four,
It is connected with the retainingf key in exhaust casing diffusion device assembly, to fix second level stator blade fixed ring and adjust its circumferential, radial position
It sets, it is ensured that second level stator blade fixed ring is concentric with rotor, turns gap between stator, obturages part gap etc. to meet the requirements.Adapt to work
When high-temperature flue gas caused by second level stator blade fixed ring freely thermally expand, avoid its from generating biggish deformation, improve peace when work
Full reliability.
Second level stator blade fixed ring uses circumferentially every one radial pin hole of several blades, with the fixation for preventing rotation
Screw carrys out fixed locating stud, the disassembly and replacement of second level stator blade when convenient to overhaul.Meanwhile second level stator blade outer rim T can be eliminated
The accumulation of template sideshake improves the accurate positioning precision of second level stator blade.
The inner platform of second level stator blade obturages ring assemblies using ledge arrangement fixation, and obturaging piece and wheel disc can preferably match
It closes, plays interstage air sealing function, reduce the leakage of flue gas flow in channel, improve the working efficiency of flue gas turbine expander.
By the above-mentioned second level stator blade ring assemblies adaptively thermally expanded, it is excessive to substantially reduce second level stator blade ring assemblies center
It deforms, it can be with free wxpansion in work, it is ensured that inside turns the clearance requirement between stator blade, and guarantee will not touch mill, mention
The reliability of high sealing densification device reduces rotor-stator due to gap anomalous variation bring load, improves flue gas wheel
The working performance of machine.
In conclusion the present invention is by product use process, the second level stator blade ring assemblies as caused by high-temperature flue gas are generated
Deformation, be adjusted reassembling timing, the excessive deformation of second level stator blade fixed ring will be substantially reduced；The present invention has freely swollen
Swollen function guarantees that second level stator blade ring assemblies free end can only be axially and radially subjected to displacement, and does not generate angular displacement deformation,
Additional load and biggish internal stress will not be generated；The present invention, which has, obturages ring assemblies, meets internal turn between stator blade
Clearance requirement guarantees that unit will not touch mill, improves the reliability of sealing densification device, improve the effect of flue gas turbine expander
Rate.The present invention is solved due to the assembly of deformation bring and adjustment difficult problem, improves assembly efficiency and functional reliability, is had
There is the characteristics of structure is simple, easy to use, disassembling, assembling and replacing is convenient, and sealing effect is good, high reliablity.
Detailed description of the invention
Second level stator blade ring assemblies main structure schematic diagram Fig. 1 of the invention.
Second level fixed blade ring component structure diagram Fig. 2 of the invention.
Second level fixed blade ring modular construction Fig. 3 of the invention installs joint detail schematic diagram.
Second level fixed blade ring modular construction Fig. 4 of the invention installs joint detail schematic diagram.
Second level fixed blade ring modular construction Fig. 5 of the invention installs joint detail schematic diagram.
Description of symbols: 1- second level stator blade ring assemblies, 2- hex screw, 3- exhaust casing diffusion device assembly, 4- level-one
Stator blade ring assemblies, 5- second level stator blade fixed ring lower half, 6- hex nut, 7- locking plate, the first positioning pin of 8-, 9- turret head spiral shell
Bolt, the 10- second level stator blade fixed ring upper half, 11- second level stator blade fixed ring, 12- fixing screws, the second positioning pin of 13-, 14- bis-
Grade stator blade, 15- conical head rivet, 16- obturage ring assemblies, and 17- obturages piece, 18- retainingf key.
Specific embodiment
The present invention is made further instructions below in conjunction with attached drawing.
As shown in Figures 1 to 5, the second level stator blade ring assemblies that a kind of flue gas turbine expander provided by the invention adaptively thermally expands,
The second level stator blade ring assemblies 1 be used for be mounted on flue gas turbine expander level-one stator blade ring assemblies 4 and exhaust casing diffusion device assembly 3 it
Between.
Second level stator blade ring assemblies 1 (as shown in Figure 3) include second level stator blade fixed ring 11, fixing screws 12, the second positioning pin
13, second level stator blade 14, conical head rivet 15, obturage ring assemblies 16 and obturage piece 17.Second level stator blade ring assemblies 1 are that one end is clamped,
One end can free wxpansion cantilevered support structure.It is fixed in exhaust casing diffusion device assembly 3 using hex screw 2.It adopts
(as shown in Figure 1) is connect with the 4 phase free wxpansion of level-one stator blade ring assemblies with Z-type structure.
The ring forging good using rigidity (as shown in Figure 2) of second level stator blade fixed ring 11 is machined to be formed.In order to facilitate dress
Match, using horizontal split two halves structure.It is made of second level stator blade fixed ring lower half 5 and the second level stator blade fixed ring upper half 10.
The horizontal split split in second level stator blade fixed ring upper and lower half is using installation side connection type, and installation side is using Precision Machining the
The positioning of one positioning pin 8.Installation side is machined with through-hole respectively, connects (such as Fig. 5 using hexagon-headed bolt 9, hex nut 6 and locking plate 7
It is shown).Its internal formation has the type face of certain angle, constitutes airflow channel with second level stator blade 14.
Side is installed after second level stator blade fixed ring 11 through-hole, is fixed in exhaust casing diffuser using hex screw 2
On component 3.Disassembly when facilitating installation and maintenance.
It is installed after second level stator blade fixed ring 11 and uses four opening keyways being uniformly distributed along the circumference on side, with exhaust casing diffusion
Retainingf key 18 in device assembly 3 is connected (as shown in Figure 4), circumferential, radial to fix second level stator blade fixed ring 11 and adjust it
Position, it is ensured that second level stator blade fixed ring is concentric with rotor, turns gap between stator, obturages part gap etc. to meet the requirements.Conveniently again
Installation when secondary assembly.Adapt to work when high-temperature flue gas caused by second level stator blade fixed ring freely thermally expand, avoid its generation compared with
Big deformation improves security reliability when work.
Inside second level stator blade fixed ring 11 use circumferential T-slot, 14 outer rim T-type plate of second level stator blade mount in
In the annular groove of second level stator blade fixed ring.The second positioning pin is circumferentially installed using a radial pin hole every several blades
13 to fix second level stator blade 14, and the disassembly of second level stator blade 14, is replaced when convenient to overhaul.Meanwhile it is quiet to eliminate second level
The accumulation of 14 outer rim T-type plate sideshake of blade improves the accurate positioning precision of second level stator blade 14, it is ensured that second level stator blade 14
The throat area in channel is in the range of requiring, to improve the acting ability of blade.It is fixed that second is fixed using fixing screws 12
Position pin 13, prevents its rotation.
The inner platform of second level stator blade 14 will obturage ring assemblies using conical head rivet 15 using two layers of lug with through-hole
16 are fixed on lug, obturage and obturage piece 17 using circumferential on ring assemblies 16, obturage piece 17 and match with wheel disc, rise
To interstage air sealing function, reduces the leakage of flue gas flow in channel, improve the working efficiency of flue gas turbine expander.
11 front of second level stator blade fixed ring is Z-type structure, is cooperated to the similar structure of level-one stator blade ring assemblies 4, radially,
It is axial that there are certain gaps.When flue gas turbine expander works, with the variation of flue-gas temperature, can adaptively it be thermally expanded, into
Malformation under row work Warm status, discharges certain thermal stress, structure is avoided to block, it is ensured that 14 safety of second level stator blade can
It works by ground.The variable quantity that second level stator blade fixed ring 11 allows to have 1mm along axial direction, the variable quantity for radially allowing to have 3mm.
Claims (10)
1. a kind of second level stator blade ring assemblies that flue gas turbine expander adaptively thermally expands, which is characterized in that the second level stator blade ring assemblies (1)
For being mounted between the level-one stator blade ring assemblies (4) of flue gas turbine expander and exhaust casing diffusion device assembly (3)；Wherein,
The second level stator blade ring assemblies (1) are that one end is clamped, the other end be can free wxpansion cantilevered support structure, including second level is quiet
Leaf fixed ring (11), second level stator blade (14) are obturaged ring assemblies (16) and are obturaged piece (17), and second level stator blade fixed ring (11) is in Z
Type structure, one end are fixedly connected with exhaust casing diffusion device assembly (3), and the other end is mutually freely swollen with level-one stator blade ring assemblies (4)
Expanded joint connects；
Use circumferential T-slot inside second level stator blade fixed ring (11), second level stator blade (14) outer rim T-type plate mount in
In the annular groove of second level stator blade fixed ring (1), circumferentially every several blades using a radial pin hole, install positioning pin with
Fixed second level stator blade (14)；The inner platform of second level stator blade (14) is using two layers of lug with through-hole, using conical head rivet
(15) ring assemblies (16) will be obturaged to be fixed on lug, obturage and obturage piece (17) using circumferential on ring assemblies (16),
It obturages piece (17) to match with wheel disc, plays interstage air sealing function.
2. the second level stator blade ring assemblies that a kind of flue gas turbine expander according to claim 1 adaptively thermally expands, which is characterized in that
The second level stator blade ring assemblies (1) are linked together by hex screw (2) with exhaust casing diffusion device assembly (3).
3. the second level stator blade ring assemblies that a kind of flue gas turbine expander according to claim 1 adaptively thermally expands, which is characterized in that
Using fixing screws (12) come fixed locating stud, its loosening is prevented.
4. the second level stator blade ring assemblies that a kind of flue gas turbine expander according to claim 1 adaptively thermally expands, which is characterized in that
Second level stator blade fixed ring (11) front is Z-type structure, is cooperated to the similar structure of level-one stator blade ring assemblies (4), radially, axially
There are certain gaps.
5. the second level stator blade ring assemblies that a kind of flue gas turbine expander according to claim 4 adaptively thermally expands, which is characterized in that
Second level stator blade fixed ring (11) has the variable quantity of 1mm along axial direction, radially there is the variable quantity of 3mm.
6. the second level stator blade ring assemblies that a kind of flue gas turbine expander according to claim 1 adaptively thermally expands, which is characterized in that
Second level stator blade fixed ring (11) is formed using ring forging is machined.
7. the second level stator blade ring assemblies that a kind of flue gas turbine expander according to claim 6 adaptively thermally expands, which is characterized in that
Second level stator blade fixed ring (11) includes second level stator blade fixed ring lower half (5) and the second level stator blade fixed ring upper half (10), and two
The horizontal split split in the grade stator blade fixed ring upper half (10) and second level stator blade fixed ring lower half (5) is using installation side connection side
Formula.
8. the second level stator blade ring assemblies that a kind of flue gas turbine expander according to claim 7 adaptively thermally expands, which is characterized in that
Side is installed using positioning finger setting, installation side is machined with through-hole respectively, and using hexagon-headed bolt (9), hex nut (6) and lock
Piece (7) connection, it is internal to form the type face with certain angle, airflow channel is constituted with second level stator blade (14).
9. the second level stator blade ring assemblies that a kind of flue gas turbine expander according to claim 6 adaptively thermally expands, which is characterized in that
Second level stator blade fixed ring (11) is installed afterwards using several opening keyways being uniformly distributed along the circumference on side, with exhaust casing diffusion device assembly
(3) retainingf key (18) on is connected, for fixing second level stator blade fixed ring (11) and adjusting its circumferential, radial position, it is ensured that
Second level stator blade fixed ring is concentric with rotor, turns gap between stator, obturages part gap and meet the requirements.
10. the second level stator blade ring assemblies that a kind of flue gas turbine expander according to claim 9 adaptively thermally expands, feature exist
In the quantity for the keyway that is open is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811032252.7A CN109209517B (en) | 2018-09-05 | 2018-09-05 | Second-stage stationary blade ring assembly of self-adaptive thermal expansion of flue gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811032252.7A CN109209517B (en) | 2018-09-05 | 2018-09-05 | Second-stage stationary blade ring assembly of self-adaptive thermal expansion of flue gas turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109209517A true CN109209517A (en) | 2019-01-15 |
| CN109209517B CN109209517B (en) | 2021-03-16 |
Family
ID=64987545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811032252.7A Active CN109209517B (en) | 2018-09-05 | 2018-09-05 | Second-stage stationary blade ring assembly of self-adaptive thermal expansion of flue gas turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109209517B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017134A (en) * | 2021-11-12 | 2022-02-08 | 中国航发沈阳发动机研究所 | Method for adjusting thermal deformation rate of casing by changing thermal capacity of casing |
| CN114198151A (en) * | 2021-11-25 | 2022-03-18 | 沈阳透平机械股份有限公司 | Blade top gap control method for ORC turbine unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1225445A (en) * | 1968-10-28 | 1971-03-17 | ||
| US20070177973A1 (en) * | 2006-01-27 | 2007-08-02 | Mitsubishi Heavy Industries, Ltd | Stationary blade ring of axial compressor |
| CN102748079A (en) * | 2012-07-17 | 2012-10-24 | 湖南航翔燃气轮机有限公司 | Turbine outer ring device |
| US20170268532A1 (en) * | 2014-03-31 | 2017-09-21 | MTU Aero Engines AG | Vane ring, inner ring, and turbomachine |
-
2018
- 2018-09-05 CN CN201811032252.7A patent/CN109209517B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1225445A (en) * | 1968-10-28 | 1971-03-17 | ||
| US20070177973A1 (en) * | 2006-01-27 | 2007-08-02 | Mitsubishi Heavy Industries, Ltd | Stationary blade ring of axial compressor |
| CN102748079A (en) * | 2012-07-17 | 2012-10-24 | 湖南航翔燃气轮机有限公司 | Turbine outer ring device |
| US20170268532A1 (en) * | 2014-03-31 | 2017-09-21 | MTU Aero Engines AG | Vane ring, inner ring, and turbomachine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017134A (en) * | 2021-11-12 | 2022-02-08 | 中国航发沈阳发动机研究所 | Method for adjusting thermal deformation rate of casing by changing thermal capacity of casing |
| CN114198151A (en) * | 2021-11-25 | 2022-03-18 | 沈阳透平机械股份有限公司 | Blade top gap control method for ORC turbine unit |
| CN114198151B (en) * | 2021-11-25 | 2024-04-30 | 沈阳透平机械股份有限公司 | ORC turbine unit blade tip clearance control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109209517B (en) | 2021-03-16 |
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