A temperature control system and method for a turbine blade

Abstract

The embodiment of the application provides a temperature control system and method of a turbine blade, a gas tank is communicated with a cooling channel of a guide vane through a cooling pipeline, and a cooling valve is arranged on the cooling pipeline; a first temperature measuring unit is used for measuring a guide vane temperature of the guide vane; when the guide vane temperature is greater than a preset guide vane temperature threshold value, a control unit controls the cooling valve to be opened, gas in the gas tank is circulated in the cooling pipeline and the cooling channel, and the guide vane is cooled; the gas tank is communicated with a suction channel on a rotor casing through a suction pipeline, a suction valve is arranged on the suction pipeline; a second temperature measuring unit is used for measuring a rotor temperature of the rotor; when the rotor temperature is greater than a preset rotor temperature threshold value, the control unit controls the suction valve to be opened, the gas in the gas tank is discharged through the suction pipeline, and the high-temperature gas of the rotor is sucked and discharged through the suction channel and the suction pipeline. The application can reduce the blade temperature under the blowing condition, and does not affect the variable condition operation of the turbine system.

Description

Technical Field

[0001] This application relates to the field of turbine system technology, and in particular to a temperature control system and method for turbine blades. Background Technology

[0002] To fully utilize the energy of the heat source, compressed air energy storage systems often employ multi-stage reheat turbines. In order to ensure that the turbines can adapt to the demands of the electrical load, they often operate under varying conditions. Under low load conditions, the expansion ratio of the last-stage turbine is small, and it is in a blower mode. At this time, the turbine blades agitate the compressed air and do work on it, causing the air temperature and blade surface temperature to rise and overheat, which has an adverse effect on the equipment life and safe operation.

[0003] In related technologies, the blade temperature under blast conditions can be reduced by adjusting the intake air volume of each turbine stage, or by improving the matching between the designed thermal load and the actual load, controlling the lower limit of the turbine's minimum load, reducing the intake steam temperature to control the exhaust steam temperature, and changing the rotor materials of the last few turbine stages. These methods require adjustment and control of the turbine's operating conditions, operating load, matching characteristics, and processing materials, which can affect the turbine's adaptability to variable operating conditions. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a temperature control system and method for turbine blades.

[0005] To achieve the above objectives, this application provides a temperature control system for turbine blades, comprising: a gas tank, a cooling pipeline, a suction pipeline, a first temperature measuring unit, a second temperature measuring unit, and a control unit;

[0006] The gas tank is connected to the cooling channel of the guide vane via a cooling pipe, and a cooling valve is provided on the cooling pipe; the first temperature measuring unit is used to measure the guide vane temperature; when the guide vane temperature is greater than a preset guide vane temperature threshold, the control unit controls the cooling valve to open, and the gas in the gas tank circulates in the cooling pipe and cooling channel to cool the guide vane;

[0007] The gas tank is connected to the suction channel on the moving blade casing via a suction pipe, and a suction valve is provided on the suction pipe; the second temperature measuring unit is used to measure the moving blade temperature; when the moving blade temperature is greater than the preset moving blade temperature threshold, the control unit controls the suction valve to open, and the gas in the gas tank is discharged through the suction pipe, and the high-temperature gas of the moving blade is drawn in and discharged through the suction channel and suction pipe.

[0008] Optionally, the system also includes a gas source, which is connected to the gas tank via an inlet pipe, and an inlet valve is provided on the inlet pipe;

[0009] When the guide vane temperature is greater than the guide vane temperature threshold, the control unit controls the opening degree of the intake valve and the cooling valve according to the guide vane temperature.

[0010] Optionally, when the moving blade temperature is greater than the moving blade temperature threshold, the control unit controls the opening degree of the intake valve and the suction valve according to the moving blade temperature.

[0011] Optionally, when the guide vane temperature is greater than the guide vane temperature threshold and the moving vane temperature is greater than the moving vane temperature threshold, the control unit controls the opening degree of the intake valve, cooling valve and suction valve according to the guide vane temperature and the moving vane temperature.

[0012] Optionally, the control unit determines the opening degree of the intake valve and the cooling valve based on the guide vane temperature according to a pre-established relationship between the guide vane temperature and the opening degree of the intake valve and the cooling valve; or, the control unit uses a feedback control method to determine the opening degree of the intake valve and the cooling valve based on the guide vane temperature.

[0013] The control unit determines the opening degree of the intake valve and the suction valve based on the pre-established relationship between the moving blade temperature and the opening degree of the intake valve and the suction valve; or, the control unit uses a feedback control method to determine the opening degree of the intake valve and the suction valve based on the moving blade temperature.

[0014] Optionally, the guide vane is provided with a vertical inner finned tube running from the top to the root to form the cooling channel.

[0015] Optionally, the guide vane is provided with a bent pipe running from the top to the root to form the cooling channel.

[0016] Optionally, the guide vane is provided with multiple pipes running from the top to the root to form the cooling channel.

[0017] Optionally, the suction channel is a group of suction holes or a suction slit.

[0018] This application embodiment also provides a method for temperature control of turbine blades, wherein a gas tank is connected to a cooling channel of a guide vane via a cooling pipe, and a cooling valve is provided on the cooling pipe; the gas tank is connected to a suction channel on a moving blade casing via a suction pipe, and a suction valve is provided on the suction pipe; the method includes:

[0019] The temperature of the guide vane is measured using the first temperature measuring unit;

[0020] When the temperature of the guide vane is greater than the preset guide vane temperature threshold, the cooling valve is opened, and the gas in the gas tank circulates in the cooling pipe and cooling channel to cool the guide vane.

[0021] The temperature of the moving blade is measured using the second temperature measuring unit;

[0022] When the temperature of the moving blade is greater than the preset moving blade temperature threshold, the suction valve is opened, and the gas in the gas tank is discharged through the suction pipeline. The high-temperature gas of the moving blade is drawn in and discharged through the suction channel and suction pipeline.

[0023] As can be seen from the above, the turbine blade temperature control system and method provided in this application add a secondary air system to the original turbine system structure. When the guide vane temperature exceeds the guide vane temperature threshold, the cooling valve is opened, and cooling gas flows through the cooling pipes and cooling channels to cool the guide vane. When the moving blade temperature exceeds the moving blade temperature threshold, the suction valve is opened, and cooling gas is discharged through the suction pipe. At the same time, the high-temperature gas from the moving blade is drawn in and discharged through the suction channel and suction pipe, achieving a blade cooling effect. Under blower conditions, using the secondary air system to control the turbine blade temperature can effectively reduce the blade temperature, prevent excessive temperature from affecting the system life, and eliminate the need to adjust operating parameters, thus not affecting the variable operating conditions of the turbine system. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the system structure according to an embodiment of this application;

[0026] Figure 2 This is a structural block diagram of the control unit in an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the system structure according to another embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the cooling channel structure according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the cooling channel structure according to another embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the cooling channel structure according to another embodiment of this application;

[0031] Figure 7 This is a schematic diagram of the suction channel structure according to an embodiment of this application;

[0032] Figure 8 This is a schematic diagram of the suction channel according to another embodiment of this application. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0034] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] like Figure 1-3 As shown in the figure, this application provides a temperature control system for turbine blades, including: a gas tank 3, a cooling pipeline, a suction pipeline, a first temperature measuring unit, a second temperature measuring unit, and a control unit;

[0036] Gas tank 3 is connected to the cooling channel of guide vane through cooling pipe, and cooling valve is provided on cooling pipe; the first temperature measuring unit is used to measure the guide vane temperature; when the guide vane temperature is greater than the preset guide vane temperature threshold, the control unit controls the cooling valve to open, and the gas in gas tank 3 circulates in cooling pipe and cooling channel to cool the guide vane;

[0037] Gas tank 3 is connected to the suction channel on the moving blade casing via a suction pipe, and a suction valve is provided on the suction pipe; the second temperature measuring unit is used to measure the moving blade temperature; when the moving blade temperature is greater than the preset moving blade temperature threshold, the control unit controls the suction valve to open, and the gas in gas tank 3 is discharged through the suction pipe, and the high-temperature gas of the moving blade is drawn in and discharged through the suction channel and suction pipe.

[0038] In this embodiment, the turbine body includes guide vanes, moving blades, and a casing. For the final-stage turbine, when it is in blower mode, the surface temperature of the guide vanes and moving blades rises and overheats, which affects safe operation and reduces turbine life. To reduce blade temperature while ensuring normal operation of the turbine system, a secondary air system is added to the turbine body structure to cool the blades.

[0039] The secondary air system includes a cooling passage 5 for cooling the guide vanes and a suction passage 6 for cooling the moving blades. For the cooling passage 5, an additional gas tank 3 is connected to the cooling channel of the guide vanes via a cooling pipe. A cooling valve is installed on the cooling pipe, and a first temperature measuring unit is installed on the guide vanes. This first temperature measuring unit collects the surface temperature of the guide vanes. When the collected guide vane temperature exceeds the guide vane temperature threshold, the cooling valve is opened, and the cold air from the gas tank 3 enters the cooling channel of the guide vanes through the cooling pipe. During the flow of the cold air, the high temperature of the guide vanes is carried away, achieving the cooling purpose. For the suction passage 6, the gas tank 3 is connected to the suction channel on the moving blade casing through the suction pipe. The suction pipe is equipped with a suction valve, and the moving blade is equipped with a second temperature measuring unit. The second temperature measuring unit is used to collect the surface temperature of the moving blade. When the collected moving blade temperature is greater than the moving blade temperature threshold, the suction valve is controlled to open, and the gas in the gas tank 3 is discharged through the suction pipe. When discharged, a suction effect is formed. The high temperature gas of the moving blade is drawn in and discharged through the suction channel and suction pipe, carrying away the high temperature of the moving blade and achieving the purpose of cooling.

[0040] In some embodiments, the system further includes a gas source 1, which is connected to a gas tank 3 via an intake pipe, on which an intake valve 2 is installed. When the guide vane temperature is greater than the guide vane temperature threshold, the control unit controls the opening of the intake valve 2 and the cooling valve based on the guide vane temperature. Alternatively, when the moving vane temperature is greater than the moving vane temperature threshold, the control unit controls the opening of the intake valve 2 and the suction valve based on the moving vane temperature. Alternatively, when both the guide vane temperature and the moving vane temperature are greater than the guide vane temperature threshold, the control unit controls the opening of the intake valve 2, the cooling valve, and the suction valve based on the guide vane temperature and the moving vane temperature.

[0041] In this embodiment, the secondary air system includes an air source 1, which can be an air storage tank or a high-pressure air source diversion device, etc., and the specific form is not limited. The air source 1 is connected to the gas tank 3. When it is necessary to connect the cooling passage 5 and / or the suction passage 6, the air inlet valve 2 is opened to allow the gas from the air source 1 to enter the gas tank 3. The gas in the gas tank 3 further flows into the cooling passage 5 to cool the guide vanes, and / or flows into the suction passage 6 to cool the moving blades.

[0042] In some implementations, the control unit controls the opening of the intake valve 2, cooling valve, and / or suction valve based on the guide vane temperature and / or the moving vane temperature. For example, when the guide vane temperature exceeds a guide vane temperature threshold, the control unit uses a feedback control method to control the opening of the intake valve 2 and cooling valve based on the guide vane temperature. The guide vane temperature at the current opening is collected. If the guide vane temperature is still greater than the guide vane temperature threshold, the opening of the intake valve 2 and cooling valve is increased until the guide vane temperature falls below the guide vane temperature threshold. Alternatively, based on a pre-established relationship between the guide vane temperature and the opening of the intake valve 2, and between the guide vane temperature and the opening of the cooling valve, the opening of the intake valve 2 and cooling valve is determined directly based on the guide vane temperature.

[0043] Optionally, the functional relationship between the guide vane temperature and the opening degree of the cooling valve can be expressed as: l = k × t B Where T is the guide vane temperature, L is the opening degree, and parameters k and b can be determined experimentally based on the turbine and valve structures. Controlling the opening degrees of the intake and suction valves based on the moving blade temperature can also be achieved through a pre-built functional relationship or feedback control; similarly, controlling the opening degrees of the intake, suction, and cooling valves based on the guide vane and moving blade temperatures can also be achieved through a pre-built functional relationship or feedback control, but specific examples are not provided. It is understandable that because the gas velocity varies at different locations in the turbine system, the positions of different blades differ, the interaction intensity between the blades and the airflow also differs, and the temperatures reached by different blades and the required temperature adjustments also differ, the opening degrees of the cooling and suction valves at different locations can vary to ensure that the temperatures of each guide vane and moving blade are within a reasonable range.

[0044] like Figure 4 As shown, in some configurations, a vertical inner finned tube 100 is provided through the guide vane from top to root, forming a cooling channel. For guide vanes with thin leading and trailing edges and thick middle, a vertical inner finned tube is provided inside the guide vane from top to root, utilizing the inner finned tube to enhance heat exchange and remove heat from the guide vane.

[0045] like Figure 5 As shown, in other embodiments, a bent pipe 101 is provided through the guide vane from top to root to form a cooling channel. For guide vanes with a relatively small blade height, a relatively large axial length, and a relatively uniform thickness change from the leading edge to the trailing edge, a bent pipe is provided inside the guide vane from top to root. Cooling air flows through the bent pipe, which can more effectively remove heat from the guide vane.

[0046] like Figure 6As shown, the guide vane has multiple pipes 102 running through it from top to root, forming a cooling channel. For guide vanes with relatively large blade height, relatively large axial length, and relatively uniform thickness change from leading edge to trailing edge, multiple pipes are installed inside the guide vane from top to root, allowing cooling air to circulate in these multiple pipes for more efficient heat dissipation.

[0047] like Figure 7 , 8 As shown, in some embodiments, the suction channel is a group of suction orifices 10 or suction slits 11. When the surface temperature of the moving blade is high, the suction valve is opened, and the gas in the gas tank 3 is discharged through the suction pipeline. The high-temperature gas on the surface of the moving blade is drawn in and discharged through the group of suction orifices 10 or suction slits 11 on the casing. The distribution, suction angle, and position of the group of suction orifices or suction slits can be designed according to the turbine structure, and the specific structural form is not limited.

[0048] Combination Figure 1-3 As shown, in a specific embodiment, by adding a secondary air system and structurally improving the moving blade casing and guide vanes, the turbine blade temperature can be effectively reduced based on the original turbine system. Specifically, the turbine blades of the turbine system 8 include a first-stage guide vane 81, a first-stage moving blade 82, a second-stage guide vane 83, and a second-stage moving blade 84; the system includes an air source 1, a gas tank 3, a cooling passage 5 for cooling the guide vanes, and a suction passage 6 for cooling the moving blades. The air source 1 is connected to the gas tank 3 through an intake pipe, and an intake valve 2 is provided on the intake pipe.

[0049] Gas tank 3 is connected to the cooling channel of primary guide vane 81 via a first cooling pipe, which is equipped with a first cooling valve 51. Gas tank 3 is also connected to the cooling channel of secondary guide vane 83 via a second cooling pipe, which is equipped with a second cooling valve 54. First temperature measuring units T81 and T82 are installed on the surfaces of primary guide vane 81 and secondary guide vane 83. The first temperature measuring units collect the surface temperatures of primary guide vane 81 and secondary guide vane 83 and transmit the guide vane temperatures to the control unit. The control unit determines whether the guide vane temperature threshold has been reached based on the guide vane temperatures of primary guide vane 81 and secondary guide vane 83. If one or both of these temperatures reach the guide vane temperature threshold, the control unit opens the intake valve 2, the first cooling valve 51, and / or the second cooling valve 54, allowing gas from gas source 1 to enter gas tank 3. The gas in gas tank 3 further flows into the cooling channels of the first cooling pipe and / or the second cooling pipe, and the cooling channels of primary guide vane 81 and / or secondary guide vane 83, carrying away the heat from the guide vanes.

[0050] Gas tank 3 is connected to the first suction channel 71, second suction channel 72, third suction channel 73, and fourth suction channel 74 on the casing via first, second, third, and fourth suction pipes, respectively. Gas tank 3 is connected to exhaust pipe 9, which is equipped with exhaust valve 4. The first suction channel 71, second suction channel 72, third suction channel 73, and fourth suction channel 74 are respectively located on the casing at positions corresponding to the first-stage moving blade 82 and the second-stage moving blade 84. The first, second, third, and fourth suction pipes are respectively equipped with first suction valve 52, second suction valve 53, third suction valve 61, and fourth suction valve 62. The casing is equipped with second temperature measuring units T71 and T72 at positions corresponding to the leading and trailing edges of the first-stage moving blade 82, respectively, and the casing is equipped with second temperature measuring units T73 and T74 at positions corresponding to the leading and trailing edges of the second-stage moving blade 84, respectively. Taking the first-stage moving blade 82 as an example, the second temperature measuring unit T71 collects the surface temperature of the leading edge of the first-stage moving blade 82 and transmits the blade temperature to the control unit. The control unit determines whether the blade temperature threshold has been reached based on the blade temperature of the first-stage moving blade 82. If so, it controls the opening of the intake valve 2, exhaust valve 4, and first suction valve 52, allowing the gas in the gas source 1 to enter the gas tank 3. The high-pressure gas in the gas tank 3 is discharged through the exhaust pipe 9, creating a suction effect at the same time. The high-temperature air at the leading edge of the first-stage moving blade 82 is drawn into the exhaust pipe 9 through the first suction channel 71 and the first suction valve 52, and discharged through the exhaust pipe 9, achieving the purpose of heat dissipation.

[0051] The turbine blade temperature control system provided in this embodiment adds a secondary air system to the original turbine system and makes structural improvements to the blades and casing. When the blade temperature exceeds the temperature threshold, the secondary air system and airflow passages on the blades and casing are used to cool the blades, or an ejector method is used to extract and discharge the high-temperature gas, thereby reducing the blade temperature. This system is low-cost, highly practical, and can improve blade life. Since the geometry of the main flow channel remains unchanged, the aerodynamic performance of the system is unaffected. Because no adjustments are made to the system materials or operating parameters, it does not affect the variable operating condition operation of the turbine system.

[0052] This application embodiment also provides a method for temperature control of turbine blades, wherein a gas tank is connected to the cooling channel of the guide vane via a cooling pipe, and a cooling valve is provided on the cooling pipe; the gas tank is connected to the suction channel on the moving blade casing via a suction pipe, and a suction valve is provided on the suction pipe; the method includes:

[0053] The temperature of the guide vane is measured using the first temperature measuring unit;

[0054] When the guide vane temperature exceeds the preset guide vane temperature threshold, the cooling valve is opened, and the gas in the gas tank circulates in the cooling pipes and cooling channels to cool the guide vane.

[0055] The temperature of the moving blade is measured using the second temperature measuring unit;

[0056] When the temperature of the moving blade exceeds the preset moving blade temperature threshold, the control suction valve opens, and the gas in the gas tank is discharged through the suction pipeline. The high-temperature gas of the moving blade is drawn in and discharged through the suction channel and suction pipeline.

[0057] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this disclosure, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0058] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of the implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this disclosure, it will be apparent to those skilled in the art that the embodiments of this application can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0059] Although this disclosure has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0060] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this disclosure.

Claims

1. A temperature control system for turbine blades, characterized in that, include: Gas tank, cooling pipeline, suction pipeline, first temperature measuring unit, second temperature measuring unit, control unit; The gas tank is connected to the cooling channel of the guide vane via a cooling pipe, and a cooling valve is provided on the cooling pipe; the first temperature measuring unit is used to measure the guide vane temperature; when the guide vane temperature is greater than a preset guide vane temperature threshold, the control unit controls the cooling valve to open, and the gas in the gas tank circulates in the cooling pipe and cooling channel to cool the guide vane; The gas tank is connected to the suction channel on the moving blade casing via a suction pipe, and a suction valve is provided on the suction pipe. The second temperature measuring unit is used to measure the moving blade temperature. When the moving blade temperature is greater than a preset moving blade temperature threshold, the control unit controls the suction valve to open, and the gas in the gas tank is discharged through the suction pipe. At the same time as the gas is discharged, a suction effect is formed, and the high-temperature gas of the moving blade is drawn in and discharged through the suction channel and suction pipe.

2. The system according to claim 1, characterized in that, It also includes a gas source, which is connected to the gas tank through an inlet pipe, and an inlet valve is provided on the inlet pipe; When the guide vane temperature is greater than the guide vane temperature threshold, the control unit controls the opening degree of the intake valve and the cooling valve according to the guide vane temperature.

3. The system according to claim 2, characterized in that, When the moving blade temperature is greater than the moving blade temperature threshold, the control unit controls the opening degree of the intake valve and the suction valve according to the moving blade temperature.

4. The system according to claim 2, characterized in that, When the guide vane temperature is greater than the guide vane temperature threshold and the moving vane temperature is greater than the moving vane temperature threshold, the control unit controls the opening degree of the intake valve, cooling valve and suction valve according to the guide vane temperature and the moving vane temperature.

5. The system according to claim 3 or 4, characterized in that, The control unit determines the opening degree of the intake valve and the cooling valve based on the guide vane temperature according to a pre-established relationship between the guide vane temperature and the opening degree of the intake valve and the cooling valve; or, the control unit uses a feedback control method to determine the opening degree of the intake valve and the cooling valve based on the guide vane temperature. The control unit determines the opening degree of the intake valve and the suction valve based on the pre-established relationship between the moving blade temperature and the opening degree of the intake valve and the suction valve; or, the control unit uses a feedback control method to determine the opening degree of the intake valve and the suction valve based on the moving blade temperature.

6. The system according to claim 1, characterized in that, The guide vane has a vertical inner finned tube running from the top to the root, forming the cooling channel.

7. The system according to claim 1, characterized in that, The guide vane has a bend in the pipe running from the top to the root, forming the cooling channel.

8. The system according to claim 1, characterized in that, The guide vane is provided with multiple pipes running from the top to the root, forming the cooling channel.

9. The system according to claim 1, characterized in that, The suction channel is a group of suction holes or a suction slit.

10. A method for temperature control of turbine blades, characterized in that, The gas tank is connected to the cooling channel of the guide vane via a cooling pipe, and a cooling valve is installed on the cooling pipe; the gas tank is connected to the suction channel on the moving blade casing via a suction pipe, and a suction valve is installed on the suction pipe; the method includes: The temperature of the guide vane is measured using the first temperature measuring unit; When the temperature of the guide vane is greater than the preset guide vane temperature threshold, the cooling valve is opened, and the gas in the gas tank circulates in the cooling pipe and cooling channel to cool the guide vane. The temperature of the moving blade is measured using the second temperature measuring unit; When the temperature of the moving blade is greater than the preset moving blade temperature threshold, the suction valve is opened and the gas in the gas tank is discharged through the suction pipe. At the same time as the gas is discharged, a suction effect is formed, and the high-temperature gas of the moving blade is drawn in and discharged through the suction channel and suction pipe.

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