A gas turbine fluid drive system for driving adjustable guide vanes

Abstract

The present invention provides a fluid drive system for a gas turbine for driving adjustable guide vanes, which includes a drive ring, a plurality of transmission components, and a fluid drive device at least partially integrated in the drive ring. The fluid drive device is connected to the plurality of transmission components, and drives the plurality of transmission components to move under the drive of a fluid medium. The transmission components are connected to the adjustable guide vanes and drive the adjustable guide vanes to rotate. The gas turbine fluid drive system proposed in this application adopts a fluid drive system, which has a simple structure and high reliability, and can quickly adjust the adjustable guide vanes; a fluid drive device is designed on the drive ring, saving space on the basis of the original design; the drive ring is fixed and does not move, avoiding frictional damage and improving the reliability of the parts.

Description

Technical Field

[0001] This application relates to the field of gas turbines, and particularly to a gas turbine fluid drive system for driving adjustable guide vanes. Background Art

[0002] The drive mechanism of a gas turbine is used to adjust the angles of the inlet adjustable guide vanes and adjustable guide vanes (hereinafter collectively referred to as adjustable guide vanes) in the compressor module, thereby adjusting the mass flow rate of the gas at the compressor inlet to improve the operability and part-load performance of the gas turbine; and to prevent compressor stall and surge, achieving the best cycle efficiency.

[0003] Patent CN204226024U discloses an inlet guide vane drive mechanism. As shown in the appendix, this drive mechanism drives the rotating ring 103 to rotate through the drive rod 102. The rotating ring 103 drives the rocker arm 105 to swing through the connecting rod 104, and then drives the inlet guide vane 106 to rotate through the rocker arm 105, realizing the adjustment of the rotation angle of the inlet guide vane 106. Figure 1 As shown, this drive mechanism drives the rotating ring 103 to rotate through the drive rod 102. The rotating ring 103 drives the rocker arm 105 to swing through the connecting rod 104, and then drives the inlet guide vane 106 to rotate through the rocker arm 105, realizing the adjustment of the rotation angle of the inlet guide vane 106.

[0004] This drive structure has the following disadvantages:

[0005] 1) It is necessary to drive the inlet guide vane through the movement of a series of connected parts, involving a large number of components, and the movement mode is complex, which is not conducive to theoretical calculation and effective evaluation in the initial stage of design;

[0006] 2) There are many related components, resulting in poor reliability of the mechanism.

[0007] 3) The complexity of production and assembly increases the production and assembly time, which is not conducive to reducing product costs.

[0008] Patent CN103437833A discloses a hydraulic guide vane drive device. As shown in the appendix, this device drives the piston assembly 203 through the electro-hydraulic servo valve 202 to drive the intake guide vane to adjust the angle, and detects the displacement of the piston assembly 203 through the position sensor 204 and feeds back the displacement signal of the piston assembly 203 to the electric controller, thereby forming a closed-loop regulation system of the electro-hydraulic servo valve controlled by the electric controller, which can achieve precise regulation of the angle of the intake guide vane. This structure adopts a hydraulic drive structure, but the structure is relatively complex and cannot adjust the angle of the inlet guide vane alone. Figure 2 As shown, this device drives the piston assembly 203 through the electro-hydraulic servo valve 202 to drive the intake guide vane to adjust the angle, and detects the displacement of the piston assembly 203 through the position sensor 204 and feeds back the displacement signal of the piston assembly 203 to the electric controller, thereby forming a closed-loop regulation system of the electro-hydraulic servo valve controlled by the electric controller, which can achieve precise regulation of the angle of the intake guide vane. This structure adopts a hydraulic drive structure, but the structure is relatively complex and cannot adjust the angle of the inlet guide vane alone. Summary of the Invention

[0009] The main purpose of the present invention is to provide a gas turbine fluid drive system for driving adjustable guide vanes to solve the problems in the prior art.

[0010] To achieve the above object, according to one aspect of the present invention, a gas turbine fluid drive system 1 for driving adjustable guide vanes is proposed, which is characterized in that it includes a drive ring 10, a plurality of transmission components 20, and a fluid drive device 30 at least partially integrated within the drive ring 10, wherein the fluid drive device 30 is connected to the plurality of transmission components 20, and the fluid drive device 30 drives the plurality of transmission components 20 to move under the drive of a fluid medium, and the transmission components 20 are connected to the adjustable guide vanes to drive the adjustable guide vanes to rotate.

[0011] Further, the drive ring 10 includes a receiving cavity 11 that receives the fluid medium and at least a part of the fluid drive device 30.

[0012] Further, the fluid drive device 30 includes a plurality of drive units 31, and each drive unit 31 corresponds to each of the transmission components 20 and is connected to drive the corresponding adjustable guide vane.

[0013] Further, the receiving cavity 11 includes a plurality of independent sub-receiving cavities 111 corresponding to the drive units 31, and each drive unit 31 is at least partially disposed in the sub-receiving cavity 111, and the plurality of sub-receiving cavities 111 are distributed along the circumferential direction of the drive ring 10.

[0014] Further, the drive unit 31 includes a fluid cavity 311 and a fluid drive assembly 312, the fluid drive assembly 312 is connected to act with the fluid cavity 311, a fluid is provided in the fluid cavity 311, and the fluid adjusts the volume change of the fluid cavity 311 and drives the fluid drive assembly 312 to move.

[0015] Further, an opening 3111 is provided on one side of the sub-receiving cavity 111 connected to the transmission component 20, and the fluid drive assembly 312 is connected to the transmission component 20 through the opening 3111.

[0016] Further, the fluid drive assembly 312 includes a piston assembly 3121, the piston assembly 3121 includes a piston 3122 and a sealing ring 3123 arranged along the circumference of the piston 3122, and the piston assembly 3121 is at least partially disposed within the sub-receiving cavity 111 and reciprocates along the sub-receiving cavity 111.

[0017] Further, the fluid drive assembly 312 includes a return spring 3124, one end of the return spring 3124 is fixedly connected to the side of the sub-receiving cavity 111 away from the opening 3111, and the other end of the return spring 3124 is fixedly connected to the piston assembly 3121.

[0018] Furthermore, the inner wall of the driving ring 10 forms the accommodating cavity 11.

[0019] Furthermore, a fluid medium inlet 3112 is provided on one side of the sub-accommodating cavity 111 away from the opening 3111, and the fluid medium enters the fluid cavity 311 through the fluid medium inlet 3112.

[0020] Furthermore, a fluid medium outlet 3113 is provided at the bottom of the sub-accommodating cavity 111 along the radial direction of the driving ring 10, and the fluid medium flows out of the fluid cavity 311 through the fluid medium outlet 3113.

[0021] Furthermore, a fluid pump is provided between the fluid medium inlet 3112 and the fluid medium outlet 3113, and the fluid medium flowing out of the fluid medium outlet 3113 is sent into the fluid medium inlet 3112 through the fluid pump.

[0022] Furthermore, the transmission assembly 20 converts the linear motion of the fluid driving assembly 312 into the rotational motion of the adjustable guide vane.

[0023] Furthermore, the transmission assembly 20 is located on the side of the driving ring 10 close to the adjustable guide vane.

[0024] Furthermore, the transmission assembly 20 includes a crankshaft 210 and a connecting rod 220. One end of the crankshaft 210 is connected to the connecting rod 220, the other end of the crankshaft 210 is connected to the adjustable guide vane, and the connecting rod 220 is connected to the driving unit 31 to drive the connecting rod 220 to swing, thereby driving the crankshaft 210 to rotate.

[0025] Furthermore, the rotation axis of the crankshaft 210 is perpendicular to the central direction of the driving ring 10.

[0026] Furthermore, the transmission assembly 20 includes a rotating shaft 230. One end of the rotating shaft 230 is connected to the crankshaft 210, and the other end of the rotating shaft 230 is connected to the adjustable guide vane.

[0027] Furthermore, the fluid medium is liquid or gas.

[0028] The fluid drive system for driving adjustable guide vanes proposed in this application adopts a fluid drive system, which has a simple structure and high reliability, and can quickly adjust the adjustable guide vanes; the fluid drive device is provided with multiple independent drive units, realizing independent adjustment of the adjustable guide vanes, better improving the operability of the gas turbine, preventing compressor stall and surge, and achieving the best cycle efficiency; a fluid drive device is designed on the drive ring, saving space on the basis of the original design; in this system, the drive ring is fixed, avoiding frictional damage and improving the reliability of components; a return spring is provided to achieve the active closing of the adjustable guide vanes. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0030] Figure 1 shows a schematic diagram of an inlet guide vane drive mechanism in the prior art;

[0031] Figure 2 shows a schematic diagram of the structure of a hydraulic guide vane drive device in the prior art;

[0032] Figure 3 shows a schematic diagram of the structure of a gas turbine fluid drive system in an embodiment of the present application;

[0033] Figure 4 shows a schematic diagram of the structure of a drive unit and a transmission component in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0035] The following further describes the present invention in detail with reference to specific embodiments, and these embodiments should not be construed as limiting the scope claimed by the present invention.

[0036] Embodiment 1

[0037] The present application proposes a fluid drive system for a gas turbine that drives adjustable guide vanes. This system is applicable to the adjustment of adjustable guide vanes and the angle of the inlet adjustable guide vanes, and can thus achieve the regulation of the mass and flow rate of the gas at the compressor inlet, improve the operability of the gas turbine, and prevent compressor stall and surge. The drive system integrates the drive device in the drive ring, saving space. The drive ring remains stationary, avoiding frictional damage. The drive device, transmission device, and adjustable guide vanes are in one-to-one correspondence, enabling independent adjustment of the angle of the adjustable guide vanes. The fluid drive method is adopted, with a simple structure, which can meet the requirements of rapid start-up and rapid load change of the gas turbine.

[0038] As Figure 3 shown, the gas turbine fluid drive system 1 includes a drive ring 10, a plurality of transmission components 20, and a fluid drive device 30 at least partially integrated within the drive ring 10. Among them, the fluid drive device 30 is connected to the plurality of transmission components 20. The fluid drive device 30 drives the plurality of transmission components 20 to move under the drive of a fluid medium. The transmission components 20 are connected to the adjustable guide vanes, driving the adjustable guide vanes to rotate, thereby achieving the adjustment of the adjustable guide vanes. By integrating the drive device in the drive ring, space is saved while maintaining the original structure. During the rotation of the adjustable guide vanes, the drive ring remains stationary, reducing frictional wear generated by components during movement and improving the reliability of the components.

[0039] Specifically, the fluid drive device 30 includes a plurality of drive units 31. Each drive unit 31, each transmission component 20, and the adjustable guide vanes are in one-to-one correspondence, achieving independent adjustment of the adjustable guide vanes to meet the adjustment requirements of different application scenarios.

[0040] Combined with Figure 3 and Figure 4 shown, the drive ring 10 includes a receiving cavity 11. The receiving cavity 11 houses the fluid medium and at least a part of the fluid drive device 30. Preferably, the inner wall of the drive ring 10 forms the receiving cavity 11. The receiving cavity 11 includes a plurality of independent sub-receiving cavities 111, and the sub-receiving cavities 111 are cylindrical cavities. The sub-receiving cavities 111 are correspondingly arranged with the respective drive units 31. Each drive unit 31 is at least partially disposed in the sub-receiving cavity 111, and the plurality of sub-receiving cavities 111 are distributed along the circumferential direction of the drive ring 10. By providing a plurality of independent sub-receiving cavities 111 to respectively house the respective drive units 31 and driving the adjustable guide vanes through the plurality of drive units 31, independent adjustment of the adjustable guide vanes is achieved, and the driving of the adjustable guide vanes is more stable and uniform.

[0041] In addition, an opening 3111 is provided on the side of the sub-receiving cavity 111 connected to the transmission component 20. The fluid drive component 312 is connected to the transmission component 20 through the opening 3111.

[0042] The gas turbine fluid drive system proposed in this application adopts a fluid drive method, and drives the adjustable guide vane to rotate through a transmission component. The overall structure of the device is simple, and the angle adjustment of the adjustable guide vane can be quickly realized.

[0043] Specifically, as Figure 4 shown, the drive unit 31 is integrated in a sub-accommodation cavity 111 of the drive ring 10. The drive unit 31 includes a fluid cavity 311 and a fluid drive component 312. The fluid drive component 312 is connected to the fluid cavity 311 in an interacting manner. There is fluid in the fluid cavity 311, and the fluid adjusts the volume change of the fluid cavity 311, thereby driving the movement of the fluid drive component 312. In this application, the fluid is a liquid medium or a gas medium, and no specific limitation is made here.

[0044] The fluid drive component 312 includes a piston component 3121. The piston component 3121 includes a piston 3122 and a sealing ring 3123 arranged circumferentially along the piston 3122. The piston component 3121 is arranged in the sub-accommodation cavity 111 and makes a reciprocating motion along the sub-accommodation cavity 111 under the action of the fluid in the fluid cavity 311. The sealing ring 3123 ensures the sealing of the fluid cavity 311. The attached drawing is only for illustration. The piston component 3121 can be partially located in the cavity of the sub-accommodation cavity 111 or can be completely located in the cavity of the sub-accommodation cavity 111, and no limitation is made here.

[0045] To ensure that the adjustable guide vane is in a fully closed state after the gas turbine stops working, in an embodiment of this application, the fluid drive component 312 is further provided with a return spring 3124. One end of the return spring 3124 is fixedly connected to the side of the sub-accommodation cavity 111 away from the opening 3111, and the other end of the return spring 3124 is fixedly connected to the piston component 3121.

[0046] During the startup and load operation of the gas turbine, the fluid medium is pumped into the fluid cavity, causing a large pressure in the fluid cavity 311, pushing the piston component 3121 forward. At this time, the return spring 3124 is in an extended state, and the piston component 3121 drives the transmission component 20 to move, thereby driving the adjustable guide vane to rotate; when the gas turbine stops working, the pressure in the fluid cavity 311 decreases, and using the return force of the return spring 3124, the piston component 3121 moves backward, and pulls the adjustable guide vane to rotate in the opposite direction through the transmission component 20, and is in a fully closed state.

[0047] In an embodiment of this application, the transmission component 20 is located on the side of the drive ring 10 close to the adjustable guide vane. The transmission component 20 is respectively connected to the fluid drive component 312 and the adjustable guide vane. The transmission component 20 can convert the linear motion of the fluid drive component 312 into the rotational motion of the adjustable guide vane.

[0048] Specifically, the transmission assembly 20 includes a crankshaft 210 and a connecting rod 220. One end of the crankshaft 210 is connected to the connecting rod 220, and the other end of the crankshaft 210 is connected to an adjustable guide vane. The connecting rod 220 is connected to the piston assembly 3121 of the driving unit 31 through an opening 3111 on the sub-accommodation cavity 111. When the piston assembly 3121 reciprocates, it drives the connecting rod 220 to swing, and the crankshaft 210 rotates under the action of the connecting rod 220, thereby driving the adjustable guide vane to rotate. By converting the reciprocating motion of the piston assembly into the rotational motion of the adjustable guide vane through the crankshaft and connecting rod transmission assembly, the conversion of the driving force is achieved.

[0049] In addition, to better ensure that the crankshaft drives the adjustable guide vane, the rotation axis of the crankshaft 210 is perpendicular to the central direction of the driving ring 10, and the rotation axis of the crankshaft 210 is consistent with that of the adjustable guide vane. In addition, the transmission assembly 20 further includes a rotating shaft 230. One end of the rotating shaft 230 is connected to the crankshaft 210, and the other end of the rotating shaft 230 is connected to the adjustable guide vane. The crankshaft 210 drives the adjustable guide vane to rotate through the rotating shaft 230.

[0050] In addition, the fluid drive system is also provided with a fluid medium circulation path to drive the piston assembly to reciprocate and realize the recycling of the fluid medium.

[0051] Specifically, as Figure 4 shown, a fluid medium inlet 3112 is provided on one side of the sub-accommodation cavity 111 away from the opening 3111, and the fluid medium enters the fluid cavity 311 through the fluid medium inlet 3112; a fluid medium outlet 3113 is provided at the bottom of the sub-accommodation cavity 111 along the radial direction of the driving ring 10, and the fluid medium flows out of the fluid cavity 311 through the fluid medium outlet 3113. A fluid pump (not shown in the figure) is provided between the fluid medium inlet 3112 and the fluid medium outlet 3113, and the fluid medium flowing out of the fluid medium outlet 3113 is sent to the fluid medium inlet 3112 through the fluid pump. During the startup and load operation of the gas turbine, the fluid medium inlet 3112 is opened, and the fluid medium is pumped into the fluid cavity 311 through the fluid medium inlet 3112, so that the pressure in the fluid cavity 311 increases. The fluid medium pushes the piston assembly 3121 forward and drives the adjustable guide vane to rotate through the transmission assembly 20; when the gas turbine stops working, the fluid medium outlet 3113 is opened, and the fluid medium flows out of the fluid cavity 311 through the fluid medium outlet 3113, so that the pressure in the fluid cavity 311 decreases. The piston assembly 3121 moves backward under the action of the return spring 3124, causing the adjustable guide vane to rotate in the reverse direction to achieve closing.

[0052] The gas turbine fluid drive system proposed in this application has the following advantages: ① By adopting a fluid drive system, it has a simple structure and high reliability, and can quickly adjust the adjustable guide vane; ② The fluid drive device is provided with multiple independent drive units, realizing independent adjustment of the adjustable guide vane, better improving the operability of the gas turbine, preventing compressor stall and surge, and achieving the best cycle efficiency; ③ The fluid drive device is designed on the drive ring, saving space on the basis of the original design; ④ In this system, the drive ring is fixed, avoiding frictional damage and improving the reliability of components; ⑤ A return spring is provided to achieve the active closing of the adjustable guide vane.

[0053] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0054] It should be noted that in the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

Claims

1. A gas turbine fluid drive system (1) for driving adjustable guide vanes, characterized in that, It includes a drive ring (10), a plurality of transmission components (20), and a fluid drive device (30) at least partially integrated within the drive ring (10), wherein the fluid drive device (30) is connected to the plurality of transmission components (20), and the fluid drive device (30) drives the plurality of transmission components (20) to move under the drive of a fluid medium. The transmission component (20) is connected to the adjustable guide vane and drives the adjustable guide vane to rotate; the drive ring (10) includes a receiving cavity (11), the inner ring wall of the drive ring (10) forms the receiving cavity (11), and the receiving cavity (11) houses the fluid medium and at least a part of the fluid drive device (30). The fluid drive device (30) includes a plurality of drive units (31), each drive unit (31) corresponding to each transmission component (20) and connected to drive the corresponding adjustable guide vane; the drive unit (31) includes a fluid cavity (311) and a fluid drive component (312), the fluid drive component (312) is connected to act with the fluid cavity (311), there is fluid in the fluid cavity (311), and the fluid adjusts the volume change of the fluid cavity (311) and drives the fluid drive component (312) to move; the fluid drive component (312) includes a piston assembly (3121), the piston assembly (3121) includes a piston (3122) and a sealing ring (3123) arranged circumferentially along the piston (3122), the receiving cavity (11) includes a plurality of independent sub-receiving cavities (111) corresponding to each drive unit (31), each drive unit (31) is at least partially arranged in the sub-receiving cavity (111), and the plurality of sub-receiving cavities (111) are distributed along the circumferential direction of the drive ring (10); an opening (3111) is provided on one side of the sub-receiving cavity (111) connected to the transmission component (20), and the fluid drive component (312) is connected to the transmission component (20) through the opening (3111). The piston assembly (3121) is at least partially arranged in the sub-receiving cavity (111) and reciprocates along the sub-receiving cavity (111); the fluid drive component (312) includes a return spring (3124), one end of the return spring (3124) is fixedly connected to the side of the sub-receiving cavity (111) away from the opening (3111), and the other end of the return spring (3124) is fixedly connected to the piston assembly (3121).

2. The gas turbine fluid drive system (1) for driving adjustable guide vanes according to claim 1, characterized in that, A fluid medium inlet (3112) is provided on the side of the sub-receiving cavity (111) away from the opening (3111), and the fluid medium enters the fluid cavity (311) through the fluid medium inlet (3112).

3. The gas turbine fluid drive system (1) for driving an adjustable guide vane according to claim 2, characterized in that, A fluid medium outlet (3113) is provided at the bottom of the sub-receiving cavity (111) along the radial direction of the drive ring (10), and the fluid medium flows out of the fluid cavity (311) through the fluid medium outlet (3113).

4. The gas turbine fluid drive system (1) for driving adjustable guide vanes according to claim 3, characterized in that, A fluid pump is provided between the fluid medium inlet (3112) and the fluid medium outlet (3113), and the fluid medium flowing out of the fluid medium outlet (3113) is sent into the fluid medium inlet (3112) through the fluid pump.

5. The gas turbine fluid drive system (1) for driving an adjustable guide vane according to claim 1, characterized in that, The transmission assembly (20) converts the linear motion of the fluid driving assembly (312) into the rotational motion of the adjustable guide vane.

6. The gas turbine fluid drive system (1) for driving an adjustable guide vane according to claim 1, characterized in that, The transmission assembly (20) is located on one side of the drive ring (10) close to the adjustable guide vane.

7. The gas turbine fluid drive system (1) for driving adjustable guide vanes according to claim 1, characterized in that, The transmission assembly (20) includes a crankshaft (210) and a connecting rod (220). One end of the crankshaft (210) is connected to the connecting rod (220), the other end of the crankshaft (210) is connected to the adjustable guide vane, and the connecting rod (220) is connected to the driving unit (31) to drive the connecting rod (220) to swing, thereby driving the crankshaft (210) to rotate.

8. The gas turbine fluid drive system (1) for driving adjustable guide vanes according to claim 7, characterized in that, The rotation axis of the crankshaft (210) is perpendicular to the central direction of the drive ring (10).

9. The gas turbine fluid drive system (1) for driving adjustable guide vanes according to claim 7, characterized in that, The transmission assembly (20) includes a rotating shaft (230). One end of the rotating shaft (230) is connected to the crankshaft (210), and the other end of the rotating shaft (230) is connected to the adjustable guide vane.

10. The gas turbine fluid drive system (1) for driving adjustable guide vanes according to claim 1, characterized in that, The fluid medium is liquid or gas.

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