CN108729958A - A kind of reversion variable geometry turbine of the variable stator vane angle with low consistency zero-lift blade profile - Google Patents
A kind of reversion variable geometry turbine of the variable stator vane angle with low consistency zero-lift blade profile Download PDFInfo
- Publication number
- CN108729958A CN108729958A CN201810531044.5A CN201810531044A CN108729958A CN 108729958 A CN108729958 A CN 108729958A CN 201810531044 A CN201810531044 A CN 201810531044A CN 108729958 A CN108729958 A CN 108729958A
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- Prior art keywords
- stator blade
- wheel hub
- low
- movable vane
- blade
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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
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
Abstract
The present invention provides a kind of reversion variable geometry turbine of the variable stator vane angle with low consistency zero-lift blade profile, including casing, wheel hub, adjustable stator blade and movable vane piece are along the circumferential direction uniformly installed between casing and wheel hub, adjustable stator blade is preceding, movable vane piece is rear, movable vane piece is mounted on wheel hub, movable vane wheel hub is arranged by stator blade wheel hub, there is changeover portion and low-pressure turbine with support plate in the upstream of variable geometry turbine adjustable stator blade, the quiet movable vane piece of low-pressure turbine is preceding, low-pressure turbine movable vane piece is mounted on wheel hub, changeover portion is between low-pressure turbine and variable geometry turbine, the consistency of adjustable stator blade is relatively low, value is 0.6~1.1, adjustable stator blade blade profile bending degree is small, profile lift coefficient is extremely low, value is 0.15~0.45, variable geometry turbine is opposite with the direction of rotation of low-pressure turbine.The present invention can effectively reduce adjustable stator blade tip-clearance and gap leakage flow rate, hence it is evident that reduce adjustable stator blade fluid deflection, improve variable geometry turbine multi-state efficiency, have good functional reliability.
Description
Technical field
The present invention relates to a kind of turbines of gas turbine/aero-engine, more particularly to one kind having low consistency zero-lift
The reversion variable geometry turbine of the variable stator vane angle of blade profile.
Background technology
Gas turbine/aero-engine often runs work under off-design behaviour, and turbine efficiency can be significantly at this time
It reduces.Variable geometry turbine technology can effectively adjust and optimize the matching between each passage component of gas turbine/aero-engine,
Improve the acceleration and deceleration characteristic and low-load performance of gas turbine/aero-engine.The setting angle for adjusting Turbomachinery is then one
The effective change method of geometry of kind.
The variable geometry turbine variable stator vane angle structure of the prior art, in order to ensure that Turbomachinery can rotate, stator blade upper and lower side
Wall will be there are gap, and so as to cause the leakage loss of stator blade, and bent angle existing for variable stator vane angle blade profile itself is also further
The complexity for exacerbating variable stator vane angle interior flow field under variable working condition, seriously affects turbine efficiency.Due to the deficiencies in the prior art, people
It is hoped that there will be a kind of variable geometry turbines that can effectively improve variable geometry turbine multi-state efficiency and reliable operation.
Invention content
The purpose of the invention is to effectively reduce adjustable stator blade tip-clearance and gap leakage flow rate, hence it is evident that reduce adjustable
Stator blade fluid deflection improves variable geometry turbine multi-state efficiency and provides a kind of adjustable with low consistency zero-lift blade profile
The reversion variable geometry turbine of stator blade.
The object of the present invention is achieved like this：Distinguish between casing and stator blade wheel hub, between machine lock and movable vane wheel hub
Along the circumferential direction uniformly installation adjustable stator blade and movable vane piece, and machine lock, stator blade wheel hub, movable vane wheel hub, stator blade, movable vane piece structure
At variable geometry turbine, adjustable stator blade is preceding, and for movable vane piece rear, upper and lower rotation is respectively set in the upper and lower end face of adjustable stator blade
Axis, and its axle center, on same rotation axis, upper rotary shaft is embedded into casing, Shaft is embedded into stator blade wheel hub, on
The adjustment bar of installation and adjustment adjustable stator blade angle in rotary shaft, adjustment bar are extend out to outside casing, and movable vane wheel hub is arranged in stator blade
By wheel hub, changeover portion and low-pressure turbine with support plate are set gradually in the upstream of adjustable stator blade, the quiet movable vane piece of low-pressure turbine exists
Before, low-pressure turbine movable vane piece is mounted on wheel hub, and the consistency value of adjustable stator blade is 0.6~1.1, and adjustable stator blade blade profile is curved
Qu Chengdu is small, and profile lift coefficient value is 0.15~0.45, and variable geometry turbine is opposite with the direction of rotation of low-pressure turbine.
The invention also includes some such structure features：
1. there are gaps between casing and adjustable stator blade upper surface, stayed between stator blade wheel hub and adjustable stator blade lower face
There is gap.
2. the diameter of axle of rotary shaft is more than the diameter of axle of Shaft on.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention is from turbo blade blade tip clearance petiolarea leakage stream
Motivation reason is set out, adjustable quiet to reduce to increase rotation shaft diameter as far as possible by the way that adjustable stator blade consistency is greatly lowered
Blade tip portion gap size, and zero-lift blade profile (profile lift coefficient is extremely low) is used on this basis, to reduce simultaneously
The leakage stream driving force of adjustable stator blade terminal nose and trailing edge portion gap position, adjustable stator blade end is greatly lowered
Clearance leakage is lost；Meanwhile using reversion variable geometry turbine, to further decrease the turning angle of adjustable stator blade, this is conducive to
The high efficiency control of adjustable stator blade interior flow field under the conditions of variable working condition, to significantly improve variable geometry turbine multi-state efficiency；
In addition, the configuration of the present invention is simple, processing and engineer application are also more convenient.
Description of the drawings
Fig. 1 is the meridian view of low-pressure turbine movable vane, changeover portion and reversion variable geometry turbine；
Fig. 2 is low consistency zero-lift adjustable stator blade leaf structure schematic diagram；
Fig. 3 is adjustable stator blade blade profile power load distributing schematic diagram.
In figure：φ is static pressure coefficient, CzFor blade profile axial coordinate.
Specific implementation mode
Present invention is further described in detail with specific implementation mode below in conjunction with the accompanying drawings.
In conjunction with Fig. 1~3, the present invention is by 7 groups of casing 3, adjustable stator blade 5, movable vane piece 6, stator blade wheel hub 2 and movable vane wheel hub
At along the circumferential direction uniformly installation adjustable stator blade 5 and movable vane piece 6, adjustable stator blade 5 exist between wheel hub 2,7 and casing 3
Before, movable vane piece 6 is rear, and rotary shaft 4 and Shaft 1 is respectively set in the upper and lower end face of adjustable stator blade 5, and axle center is same
On one rotation axis, upper rotary shaft 4 is embedded into casing 3, and Shaft 1 is embedded into wheel hub 2, and the diameter of axle of upper rotary shaft 4 is big
In the diameter of axle of Shaft 1, Shaft 1 only plays the role of positioning, the installation and adjustment adjustable stator blade angle in upper rotary shaft 4
Bar is adjusted, adjustment bar is extend out to outside casing 3, and movable vane piece 6 is mounted on wheel hub 7, and movable vane wheel hub 7 is arranged by stator blade wheel hub 2.
There is the changeover portion 8 with support plate and low-pressure turbine stator blade 9 in the upstream of variable geometry turbine adjustable stator blade 5 and moves
Blade 10, preceding, low-pressure turbine movable vane piece is mounted on wheel hub the quiet movable vane piece of low-pressure turbine, changeover portion 8 be located at low-pressure turbine and
Between variable geometry turbine, the direction of rotation of variable geometry turbine and upstream low-pressure turbine on the contrary, the consistency of adjustable stator blade 5 is relatively low,
Value is 0.6~1.1, and adjustable stator blade blade profile bending degree is small, sees Fig. 2, profile lift coefficient (Zw) is extremely low, value 0.15
~0.45, specific adjustable stator blade consistency and profile lift coefficient value can be by means of existing cfdrc moulds
Quasi- or experiment obtains.
Meanwhile in order to further control adjustable stator blade tip-clearance leakage rate, as shown in figure 3, adjustable stator blade end
Power load distributing (the i.e. static pressure coefficient φ C in an axial direction of blade profile pressure face 11, suction surface 12 of blade profilezDistribution) should be front load or
Uniform load.
A kind of reversion variable geometry turbine of variable stator vane angle with low consistency zero-lift blade profile of the present invention, including casing,
Wheel hub along the circumferential direction uniformly installs adjustable stator blade and movable vane piece between casing and wheel hub, and adjustable stator blade is in preceding, movable vane
Piece is rear, and upper and lower rotary shaft is respectively set in the upper and lower end face of adjustable stator blade, and axle center is on same rotation axis, upper rotation
Axis is embedded into casing, and Shaft is embedded into wheel hub, the adjustment bar of installation and adjustment adjustable stator blade angle in upper rotary shaft,
Adjustment bar extend out to outside casing, movable vane piece be mounted on wheel hub on, movable vane wheel hub be arranged by stator blade wheel hub, variable geometry turbine can
The upstream of stator blade is adjusted to there is changeover portion and low-pressure turbine with support plate, the quiet movable vane piece of low-pressure turbine is in preceding, low-pressure turbine movable vane
Piece be mounted on wheel hub on, changeover portion between low-pressure turbine and variable geometry turbine, it is characterized in that：The consistency of adjustable stator blade compared with
Low, value is 0.6~1.1, and adjustable stator blade blade profile bending degree is small, and profile lift coefficient is extremely low, and value is 0.15~0.45,
Variable geometry turbine is opposite with the direction of rotation of low-pressure turbine.There are gap between casing and adjustable stator blade upper surface, wheel hub and
There are gaps between adjustable stator blade lower face.The diameter of axle of upper rotary shaft is more than the diameter of axle of Shaft.
To sum up, the purpose of the present invention is to provide a kind of reversions of variable stator vane angle with low consistency zero-lift blade profile to become several
What turbine, including casing, wheel hub along the circumferential direction uniformly install adjustable stator blade and movable vane piece between casing and wheel hub, can
Adjust stator blade preceding, movable vane piece is rear, and upper and lower rotary shaft is respectively set in the upper and lower end face of adjustable stator blade, and axle center is same
On rotation axis, upper rotary shaft is embedded into casing, and Shaft is embedded into wheel hub, and installation and adjustment are adjustable quiet in upper rotary shaft
The adjustment bar of blade angle, adjustment bar are extend out to outside casing, and movable vane piece is mounted on wheel hub, and movable vane wheel hub is arranged in stator blade wheel hub
There is changeover portion and low-pressure turbine with support plate, the quiet movable vane piece of low-pressure turbine in the upstream of variable geometry turbine adjustable stator blade in side
Preceding, low-pressure turbine movable vane piece is mounted on wheel hub, and changeover portion is between low-pressure turbine and variable geometry turbine, adjustable stator blade
Consistency it is relatively low, value be 0.6~1.1, adjustable stator blade blade profile bending degree is small, and profile lift coefficient is extremely low, and value is
0.15~0.45, variable geometry turbine is opposite with the direction of rotation of low-pressure turbine.The present invention with low consistency zero-lift blade profile
The reversion variable geometry turbine of variable stator vane angle can effectively reduce adjustable stator blade tip-clearance and gap leakage flow rate, hence it is evident that reduce adjustable
Stator blade fluid deflection improves variable geometry turbine multi-state efficiency, and has good functional reliability.
Claims (3)
1. a kind of reversion variable geometry turbine of the variable stator vane angle with low consistency zero-lift blade profile, casing and stator blade wheel hub it
Between, along the circumferential direction uniformly installation adjustable stator blade and movable vane piece, and machine lock, stationary blade wheel respectively between machine lock and movable vane wheel hub
Hub, movable vane wheel hub, stator blade, movable vane piece constitute variable geometry turbine, and adjustable stator blade is preceding, and movable vane piece is in rear, adjustable stator blade
Upper and lower end face upper and lower rotary shaft is respectively set, and its axle center, on same rotation axis, upper rotary shaft is embedded into casing,
Shaft is embedded into stator blade wheel hub, the adjustment bar of installation and adjustment adjustable stator blade angle in upper rotary shaft, and adjustment bar stretches out
To outside casing, movable vane wheel hub be arranged by stator blade wheel hub, the upstream of adjustable stator blade set gradually the changeover portion with support plate and
Low-pressure turbine, preceding, low-pressure turbine movable vane piece is mounted on wheel hub the quiet movable vane piece of low-pressure turbine, it is characterised in that：Variable stator vane angle
The consistency value of piece is 0.6~1.1, and adjustable stator blade blade profile bending degree is small, and profile lift coefficient value is 0.15~0.45,
Variable geometry turbine is opposite with the direction of rotation of low-pressure turbine.
2. a kind of reversion variable geometry turbine of variable stator vane angle with low consistency zero-lift blade profile according to claim 1,
It is characterized in that：There are gaps between casing and adjustable stator blade upper surface, between stator blade wheel hub and adjustable stator blade lower face
There are gaps.
3. a kind of reversion of variable stator vane angle with low consistency zero-lift blade profile according to claim 1 or 2 becomes geometry whirlpool
Wheel, it is characterised in that：The diameter of axle of upper rotary shaft is more than the diameter of axle of Shaft.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018103694648 | 2018-04-24 | ||
| CN201810369464 | 2018-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108729958A true CN108729958A (en) | 2018-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810531044.5A Pending CN108729958A (en) | 2018-04-24 | 2018-05-29 | A kind of reversion variable geometry turbine of the variable stator vane angle with low consistency zero-lift blade profile |
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| CN (1) | CN108729958A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513373A (en) * | 2021-07-08 | 2021-10-19 | 哈尔滨工程大学 | Variable geometry turbine one-dimensional pneumatic design method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2328790Y (en) * | 1997-05-13 | 1999-07-14 | 北京全三维动力工程有限公司 | Rear loading static blade for tangential turbine |
| CN104100305A (en) * | 2014-07-22 | 2014-10-15 | 哈尔滨工程大学 | Large meridional expansion variable-geometry turbine with orthogonal adjustable stator blades |
| CN104595245A (en) * | 2015-01-04 | 2015-05-06 | 南京航空航天大学 | Last-stage front half section adjustable stator blade for axial-flow compressor and working method thereof |
| CN105604611A (en) * | 2016-03-03 | 2016-05-25 | 哈尔滨工程大学 | Variable-geometry turbine with strake wing structure of moving blade |
| US20160369639A1 (en) * | 2015-06-22 | 2016-12-22 | General Electric Company | Ducted thrust producing system with asynchronous fan blade pitching |
-
2018
- 2018-05-29 CN CN201810531044.5A patent/CN108729958A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2328790Y (en) * | 1997-05-13 | 1999-07-14 | 北京全三维动力工程有限公司 | Rear loading static blade for tangential turbine |
| CN104100305A (en) * | 2014-07-22 | 2014-10-15 | 哈尔滨工程大学 | Large meridional expansion variable-geometry turbine with orthogonal adjustable stator blades |
| CN104595245A (en) * | 2015-01-04 | 2015-05-06 | 南京航空航天大学 | Last-stage front half section adjustable stator blade for axial-flow compressor and working method thereof |
| US20160369639A1 (en) * | 2015-06-22 | 2016-12-22 | General Electric Company | Ducted thrust producing system with asynchronous fan blade pitching |
| CN105604611A (en) * | 2016-03-03 | 2016-05-25 | 哈尔滨工程大学 | Variable-geometry turbine with strake wing structure of moving blade |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513373A (en) * | 2021-07-08 | 2021-10-19 | 哈尔滨工程大学 | Variable geometry turbine one-dimensional pneumatic design method |
| CN113513373B (en) * | 2021-07-08 | 2023-05-30 | 哈尔滨工程大学 | One-dimensional pneumatic design method for variable geometry turbine |
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| PB01 | Publication | ||
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Application publication date: 20181102 |