CN114607474A - Stator blade clearance control system and gas turbine with same - Google Patents
Stator blade clearance control system and gas turbine with same Download PDFInfo
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- CN114607474A CN114607474A CN202210283764.0A CN202210283764A CN114607474A CN 114607474 A CN114607474 A CN 114607474A CN 202210283764 A CN202210283764 A CN 202210283764A CN 114607474 A CN114607474 A CN 114607474A
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- actuator
- vane
- stationary blade
- control system
- gap
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- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 15
- 230000003068 static effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
- F01D11/14—Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing
- F01D11/20—Actively adjusting tip-clearance
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a stationary blade clearance control system and a gas turbine with the same, wherein the stationary blade clearance control system comprises an actuator, a clearance measurer and a control assembly, the actuator is installed on a holding ring of a stationary blade, the stationary blade is connected to the actuator, the actuator is suitable for driving the stationary blade to move along the height direction of the stationary blade, the clearance measurer is arranged on the stationary blade, the clearance measurer is suitable for detecting the size of a clearance between the end part of the stationary blade facing a rotating disc and the outer peripheral surface of the rotating disc, the control assembly is connected with the clearance measurer and the actuator, and the control assembly is suitable for controlling the actuator to act according to the detection information of the clearance measurer. The stationary blade clearance control system can regulate and control the clearance size between the stationary blade and the rotary table in real time, not only can ensure that the stationary blade does not collide with the rotary table, but also can ensure that a combustion engine keeps high-performance operation and ensures the power of the combustion engine.
Description
Technical Field
The invention relates to the technical field of gas turbines, in particular to a static blade clearance control system and a gas turbine with the same.
Background
The static blades in the gas turbine are arranged on the holding ring through blade roots and blade root groove structures, gaps are formed between the static blades and the rotating disc, and in the transient operation process of the gas turbine, due to the action of loads such as temperature fields, rotating speeds, aerodynamic force and the like, the static blades, the holding ring and the rotating disc respectively deform in unequal amplitude values, so that the gap values between the static blades and the rotating disc change.
When the clearance value is too large, the performance of the gas turbine is reduced, and when the clearance value is too small, the stationary blade and the turntable are easy to collide, so that the gas turbine is scrapped, and therefore, how to control the clearance between the stationary blade and the turntable becomes a problem to be solved urgently.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a stationary blade clearance control system, which can regulate and control the clearance size between a stationary blade and a rotating disc in real time, not only can prevent the stationary blade from colliding with the rotating disc, but also can enable a combustion engine to maintain high-performance operation and ensure the power of the combustion engine.
The embodiment of the invention also provides a gas turbine.
The stationary blade clearance control system of the embodiment of the invention comprises: an actuator mounted on a holding ring of the stationary blade, the stationary blade being connected to the actuator, the actuator being adapted to drive the stationary blade in a height direction of the stationary blade to move; a gap measuring device provided on the stator blade, the gap measuring device being adapted to detect a gap size between an end of the stator blade facing the turntable and an outer peripheral surface of the turntable; and the control assembly is connected with the gap measurer and the actuator and is suitable for controlling the actuator to act according to the detection information of the gap measurer.
According to the stationary blade clearance control system provided by the embodiment of the invention, the clearance measurer can detect the clearance size between the stationary blade and the rotating disc, the actuator is arranged on the holding ring, the stationary blade is connected to the actuator, the actuator can drive the stationary blade to move along the height direction of the stationary blade, and the control assembly can control the actuator to act according to the detection information of the clearance measurer, so that the stationary blade clearance control system can regulate and control the clearance size between the end part of the stationary blade and the rotating disc in real time, the clearance size between the stationary blade and the rotating disc is always kept near a target value on the premise of not redesigning and assembling the stationary blade, collision between the stationary blade and the rotating disc can be avoided, the high-performance operation of a combustion engine can be maintained, and the power of the combustion engine can be ensured.
In some embodiments, the actuator includes a connecting portion connected to the holding ring, and a moving portion connected to the connecting portion and movable in a height direction of the stationary blade with respect to the connecting portion, the stationary blade being connected to the moving portion.
In some embodiments, the retainer ring has a mounting groove opened toward the turntable, a blade root of the stationary blade is fitted in the mounting groove, and a dimension of the mounting groove in a height direction of the stationary blade is larger than a dimension of the blade root in the height direction of the stationary blade, and the connecting portion is connected with an inner wall of the mounting groove.
In some embodiments, the blade root is provided with a mating slot in which a portion of the actuator fits.
In some embodiments, the fitting groove extends in a height direction of the stationary blade, and a notch of the fitting groove faces or faces away from the rotary plate, the connecting portion is connected to a top wall or a bottom wall of the mounting groove, and the moving portion extends into the fitting groove and is connected to the bottom wall of the fitting groove.
In some embodiments, the fitting grooves include a first fitting groove and a second fitting groove, the first fitting groove and the second fitting groove being symmetrically arranged with respect to the stationary blade, and the actuator includes a first actuator adapted to be fitted with the first fitting groove and a second actuator adapted to be fitted with the second fitting groove.
In some embodiments, the actuator is a hydraulic actuator or an electronic actuator.
In some embodiments, the control assembly includes a controller and a computer, the controller is connected to both the gap measurer and the actuator, and the computer is connected to the controller, and the computer can receive the detection signal of the gap measurer through the controller and send a command to the controller to control the actuator to operate according to the detection signal.
The gas turbine of the embodiment of the invention comprises the vane gap control system of any one of the above items.
According to the gas turbine provided by the embodiment of the invention, by adopting the stationary blade clearance control system of the embodiment, the gas turbine has the advantages of good performance, enough power and long service life.
Drawings
FIG. 1 is a schematic view of a vane gap control system according to an embodiment of the invention.
FIG. 2 is a partial structural assembly view of a vane gap control system according to an embodiment of the present invention.
Reference numerals:
the device comprises an actuator 1, a connecting part 11, a moving part 12, a gap measuring device 2, a control assembly 3, a controller 31, a computer 32, a holding ring 4, a mounting groove 41, a static blade 5, a blade root 51, a matching groove 511 and a turntable 6.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 and 2, the vane gap control system according to the embodiment of the present invention includes an actuator 1, a gap measurer 2, and a control assembly 3. The gas turbine includes a rotor disk 6, the rotor disk 6 is provided with a rotor blade, the outer periphery of the rotor disk 6 is surrounded by a holder ring 4, the inner peripheral surface of the holder ring 4 is provided with a stator blade 5, the stator blade 5 extends toward the rotor disk 6, and the end of the stator blade 5 is spaced apart from the outer peripheral surface of the rotor disk 6.
Specifically, as shown in fig. 1 and 2, the actuator 1 is mounted on the holding ring 4 of the stationary blade 5, the stationary blade 5 is connected to the actuator 1, the actuator 1 is adapted to drive the stationary blade 5 to move in the height direction of the stationary blade 5, the gap measuring device 2 is provided on the stationary blade 5, the gap measuring device 2 is adapted to detect the gap size between the end of the stationary blade 5 facing the turntable 6 and the outer peripheral surface of the turntable 6, the control unit 3 is connected to both the gap measuring device 2 and the actuator 1, and the control unit 3 is adapted to control the operation of the actuator 1 based on the detection information of the gap measuring device 2.
Further, in actual operation, when the gap measurer 2 detects that the gap size between the stator blade 5 and the rotating disk 6 is smaller than the preset value, the control assembly 3 may control the actuator 1 to drive the stator blade 5 to move towards the direction away from the rotating disk 6, and when the gap measurer 2 detects that the gap size between the stator blade 5 and the rotating disk 6 is larger than the preset value, the control assembly 3 may control the actuator 1 to drive the stator blade 5 to move towards the direction close to the rotating disk 6.
It should be noted that, the inventor finds that the gap between the stationary blade and the rotating disk is directly related to the performance of the combustion engine, when the gap between the stationary blade and the rotating disk is too large, the combustion engine has the problems of performance reduction and insufficient power, and when the gap between the stationary blade and the rotating disk is too small, the stationary blade is easy to collide with the rotating disk in the operation process of the combustion engine, and the combustion engine has the rejection risk.
The stator blade in the related technology is directly fixedly connected to the holding ring, namely, the gap between the stator blade and the rotating disc is fixed, it is noted that in the transient operation process of the combustion engine, due to the action of loads such as a temperature field, a rotating speed, aerodynamic force and the like, the stator blade, the holding ring and the rotating disc respectively generate deformation with unequal amplitudes to cause the gap size between the stator blade and the rotating disc to be too large or too small, at the moment, in order to ensure the safety of the combustion turbine and maintain the operation with good performance, the stator blade needs to be designed and assembled again, and the stator blade gap system can adjust the gap size between the stator blade and the rotating disc in real time, so that the gap size between the stator blade and the rotating disc is adjusted to be close to a target value on the premise of not disassembling the stator blade, and the rotating disc are not collided, and the combustion engine can maintain high-performance operation.
According to the stationary blade clearance control system provided by the embodiment of the invention, the clearance measurer can detect the clearance size between the stationary blade and the rotating disc, the actuator is arranged on the holding ring, the stationary blade is connected to the actuator, the actuator can drive the stationary blade to move along the height direction of the stationary blade, and the control assembly can control the actuator to act according to the detection information of the clearance measurer, so that the stationary blade clearance control system can regulate and control the clearance size between the end part of the stationary blade and the rotating disc in real time, the clearance size between the stationary blade and the rotating disc is always kept near a target value on the premise of not redesigning and assembling the stationary blade, collision between the stationary blade and the rotating disc can be avoided, the high-performance operation of a combustion engine can be maintained, and the power of the combustion engine can be ensured.
Further, as shown in fig. 2, the actuator 1 includes a connecting portion 11 and a moving portion 12, the connecting portion 11 is connected to the holding ring 4, the moving portion 12 is connected to the connecting portion 11 and is movable in the height direction of the stator blade 5 with respect to the connecting portion 11, and the stator blade 5 is connected to the moving portion 12. Alternatively, the actuator 1 is a hydraulic actuator 1 or an electronic actuator 1.
Further, as shown in fig. 2, the retainer ring 4 has a mounting groove 41 opened toward the rotor disk 6, the blade root 51 of the stator blade 5 is fitted in the mounting groove 41, the dimension of the mounting groove 41 in the height direction of the stator blade 5 is larger than the dimension of the blade root 51 in the height direction of the stator blade 5, and the connection portion 11 is connected to the inner wall of the mounting groove 41. In other words, the blade root 51 is movable in the height direction of the vane 5 between the top wall and the bottom wall of the mounting groove 41.
Further, as shown in fig. 2, the blade root 51 is provided with a fitting groove 511, and a portion of the actuator 1 is fitted in the fitting groove 511. Therefore, the actuator 1 and the blade root 51 can share the assembly space in the installation groove 41, and the structure is more compact.
Further, as shown in fig. 2, the fitting groove 511 extends in the height direction of the stationary blade 5, and a notch of the fitting groove 511 faces or faces away from the rotating disk 6, the connecting portion 11 is connected to the top wall or the bottom wall of the mounting groove 41, and the moving portion 12 extends into the fitting groove 511 and is connected to the bottom wall of the fitting groove 511.
Specifically, taking the hydraulic actuator 1 as an example, as shown in fig. 2, the notch of the fitting groove 511 faces the turntable 6, the cylinder (the connecting portion 11) of the hydraulic actuator 1 is connected to the bottom wall of the mounting groove 41, and the piston rod (the moving portion 12) of the hydraulic actuator 1 extends into the fitting groove 511 and is connected to the bottom wall of the fitting groove 511. When the clearance between the stator vane 5 and the rotating disk 6 needs to be increased, the piston rod extends out to drive the blade root 51 to move towards the direction away from the rotating disk 6 so as to enable the stator vane 5 to move away from the rotating disk 6, and when the clearance between the stator vane 5 and the rotating disk 6 needs to be reduced, the piston rod retracts to drive the blade root 51 to move towards the direction close to the rotating disk 6 so as to enable the stator vane 5 to move relatively close to the rotating disk 6.
The fitting groove 511 is not limited to the one shown in fig. 2, and it is sufficient that the actuator 1 can be fitted into the fitting groove 511 and the moving portion 12 can move the blade root 51 in the height direction of the stator blade 5.
Alternatively, the fitting groove 511 includes a first fitting groove 511 and a second fitting groove 511, the first fitting groove 511 and the second fitting groove 511 are symmetrically arranged with respect to the stationary blade 5, the actuator 1 includes a first actuator 1 and a second actuator 1, the first actuator 1 is adapted to be fitted to the first fitting groove 511, and the second actuator 1 is adapted to be fitted to the second fitting groove 511. Therefore, the vane clearance control system of the present application controls the vane 5 to move smoothly and has high reliability.
Further, as shown in fig. 1, the control assembly 3 includes a controller 31 and a computer 32, the controller 31 is connected to both the gap measurer 2 and the actuator 1, the computer 32 is connected to the controller 31, and the computer 32 can receive the detection signal of the gap measurer 2 through the controller 31 and send a command to the controller 31 to control the actuator 1 to operate according to the detection signal.
The gas turbine provided by the embodiment of the invention comprises the vane gap control system provided by the embodiment.
According to the gas turbine provided by the embodiment of the invention, the stationary blade clearance control system is adopted, so that the gas turbine has the advantages of good performance, sufficient power and long service life.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A vane gap control system, comprising:
an actuator mounted on a holding ring of the stationary blade, the stationary blade being connected to the actuator, the actuator being adapted to drive the stationary blade in a height direction of the stationary blade to move;
a gap measuring device provided on the stator blade, the gap measuring device being adapted to detect a gap size between an end of the stator blade facing a turntable and an outer peripheral surface of the turntable;
and the control assembly is connected with the gap measurer and the actuator, and is suitable for controlling the actuator to act according to the detection information of the gap measurer.
2. The vane gap control system according to claim 1, wherein the actuator includes a connecting portion connected to the holding ring, and a moving portion connected to the connecting portion and movable in a height direction of the vane with respect to the connecting portion, the vane being connected to the moving portion.
3. The vane gap control system according to claim 2, wherein the retaining ring has a mounting groove that opens toward the turntable, a blade root of the vane is fitted in the mounting groove, a dimension of the mounting groove in a height direction of the vane is larger than a dimension of the blade root in the height direction of the vane, and the connecting portion is connected to an inner wall of the mounting groove.
4. The vane gap control system according to claim 3, wherein the blade root is provided with a fitting groove in which a portion of the actuator is fitted.
5. The vane gap control system according to claim 4, wherein the fitting groove extends in a height direction of the vane, and a notch of the fitting groove faces toward or away from the rotating disk, the connecting portion is connected to a top wall or a bottom wall of the mounting groove, and the moving portion extends into the fitting groove and is connected to the bottom wall of the fitting groove.
6. The vane gap control system according to claim 5, wherein the fitting grooves include a first fitting groove and a second fitting groove, the first fitting groove and the second fitting groove being symmetrically arranged with respect to the vane, the actuator includes a first actuator adapted to be fitted with the first fitting groove and a second actuator adapted to be fitted with the second fitting groove.
7. The vane gap control system as claimed in claim 2, wherein said actuator is a hydraulic actuator or an electronic actuator.
8. The vane gap control system according to claim 1, wherein the control assembly includes a controller and a computer, the controller is connected to both the gap measurer and the actuator, the computer is connected to the controller, and the computer receives the detection signal of the gap measurer through the controller and sends a command to the controller to control the actuator to operate according to the detection signal.
9. A gas turbine comprising the vane gap control system according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210283764.0A CN114607474A (en) | 2022-03-21 | 2022-03-21 | Stator blade clearance control system and gas turbine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210283764.0A CN114607474A (en) | 2022-03-21 | 2022-03-21 | Stator blade clearance control system and gas turbine with same |
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| Publication Number | Publication Date |
|---|---|
| CN114607474A true CN114607474A (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210283764.0A Pending CN114607474A (en) | 2022-03-21 | 2022-03-21 | Stator blade clearance control system and gas turbine with same |
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| Country | Link |
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| CN (1) | CN114607474A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0103260A2 (en) * | 1982-09-06 | 1984-03-21 | Hitachi, Ltd. | Clearance control for turbine blade tips |
| CN101892871A (en) * | 2009-05-22 | 2010-11-24 | 通用电气公司 | Power rotor alignment control system and method |
| CN101899995A (en) * | 2009-05-26 | 2010-12-01 | 通用电气公司 | The system and method that is used for gap control |
| CN104105847A (en) * | 2012-02-17 | 2014-10-15 | 三菱日立电力系统株式会社 | Single-casing steam turbine and single-shaft combined-cycle power generation apparatus |
-
2022
- 2022-03-21 CN CN202210283764.0A patent/CN114607474A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0103260A2 (en) * | 1982-09-06 | 1984-03-21 | Hitachi, Ltd. | Clearance control for turbine blade tips |
| CN101892871A (en) * | 2009-05-22 | 2010-11-24 | 通用电气公司 | Power rotor alignment control system and method |
| CN101899995A (en) * | 2009-05-26 | 2010-12-01 | 通用电气公司 | The system and method that is used for gap control |
| CN104105847A (en) * | 2012-02-17 | 2014-10-15 | 三菱日立电力系统株式会社 | Single-casing steam turbine and single-shaft combined-cycle power generation apparatus |
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