Stator guide vanes

Abstract

This invention discloses a stator guide vane, comprising a leading edge, a trailing edge, and an elastic portion. The leading edge is located at the end of the stator guide vane facing the airflow inlet, and the trailing edge is located at the end of the stator guide vane facing away from the airflow inlet. The leading edge is connected to the trailing edge via the elastic portion, which can apply a spring force to the leading edge in the direction of the airflow inlet. With the stator guide vane disclosed in this invention, the ends of the leading and trailing edges are connected by an elastic portion. When the fan rotor wake acts on the surface of the leading edge of the guide vane, it compresses the leading edge backward, while the elastic portion elastically absorbs and dissipates energy, thereby reducing the intensity of the wake impact and reducing rotor-stator interference noise.

Description

Technical Field

[0001] This invention relates to the field of aero-engines, and in particular to a stator guide vane. Background Technology

[0002] The main noise sources of modern aircraft turbofan engines consist of four parts: fan / compressor noise, combustion noise, turbine noise, and jet noise. Among these, fan / compressor noise and jet noise occupy a prominent position in the engine's total sound pressure level. With the continuous increase in the bypass ratio of turbofan engines, the corresponding exhaust velocity has decreased significantly. Therefore, compared with the noise generated by the fan / compressor, jet noise has gradually become a minor component. Thus, in modern high-bypass turbofan engines, fan / compressor noise is the most significant and prominent contributor to the total sound pressure level. Due to the prominent role of fan / compressor noise, since the 1960s, extensive research has been conducted on the generation mechanism and prediction of fan / compressor noise.

[0003] In the existing stator guide vanes, when in use, the wake and eddies generated by the engine rotor blades act on the surface of the guide vanes, hitting the blade surface and generating noise. Because the wake and eddies have high intensity and high kinetic energy, the noise generated is also high. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the wake and eddy current generated by the engine rotor blades will act on the surface of the guide vane and generate noise, and to provide a stator guide vane.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A stator guide vane is characterized in that it includes a leading edge, a trailing edge, and an elastic portion. The leading edge is located at the end of the stator guide vane facing the airflow inlet, and the trailing edge is located at the end of the stator guide vane facing away from the airflow inlet. The leading edge is connected to the trailing edge via the elastic portion, and the elastic portion can apply a spring force to the leading edge in the direction of the airflow inlet.

[0007] In this design, the aforementioned structure is used, with an elastic section connecting the leading and trailing edges. When the fan rotor wake impacts the surface of the leading edge of the guide stator blade, it compresses the leading edge backward, while the elastic section absorbs and dissipates energy, thereby reducing the impact intensity of the wake and lowering rotor-stator interference noise.

[0008] Preferably, the leading edge portion includes a leading edge chamber, and the trailing edge portion is embedded in the leading edge chamber.

[0009] In this solution, the above structure is adopted, and the leading edge is sleeved on the trailing edge through the leading edge chamber, which can avoid the joint between the leading edge and the trailing edge affecting the aerodynamic performance of the fan.

[0010] Preferably, the leading edge portion includes a leading edge chamber, and the elastic portion is disposed within the leading edge chamber; and / or

[0011] The trailing edge portion includes a trailing edge chamber, and the elastic portion is disposed within the trailing edge chamber.

[0012] In this solution, the above structure is adopted, and the elastic part is set inside the leading edge and trailing edge of the stator guide vane. This avoids the elastic part being exposed on the blade surface and thus avoids affecting the aerodynamic performance of the blade.

[0013] Preferably, the elastic part includes a telescopic rod and a sleeve, the telescopic rod and the sleeve are respectively disposed in the front edge chamber and the rear edge chamber, the telescopic rod is movably disposed in the sleeve, and the sleeve can apply a force to the telescopic rod to extend it.

[0014] In this design, a controllable hydraulic telescopic rod connects the leading and trailing edges. The sleeve and the telescopic rod are respectively located in the leading and trailing edge chambers. When the leading edge moves towards the trailing edge, the telescopic rod is pressed into the sleeve. When the wake hits the leading edge surface, the controllable hydraulic telescopic rod assembly can effectively dissipate energy, reduce the intensity of the wake impacting the stator, and reduce rotor-stator interference noise.

[0015] Preferably, the sleeve and the telescopic rod are hydraulically driven.

[0016] In this solution, the telescopic rod inside the sleeve is hydraulically driven to extend outward, providing high strength and meeting the elastic strength requirements.

[0017] Preferably, the plurality of sleeves and the telescopic rods are arranged parallel to each other and spaced apart.

[0018] In this scheme, an array connection is formed by multiple sets of controllable hydraulic telescopic rods, which makes it stronger, has a better connection effect, and has a higher energy release efficiency.

[0019] Preferably, the elastic portion includes one or more springs, with the two ends of the springs respectively connected to the leading edge portion and the trailing edge portion.

[0020] In this solution, the above structure is adopted, and a spring is used as an elastic element to connect the leading edge, which has low cost and simple and easy process to implement.

[0021] Preferably, the plurality of springs are arranged parallel to each other and spaced apart.

[0022] In this design, the aforementioned structure is used, with the elastic part consisting of a spring array formed by multiple springs connected in parallel. When the fan rotor wake acts on the surface of the guide stator blades, it compresses the leading edge chamber and causes it to move backward. The spring array can elastically absorb energy and effectively dissipate it, thereby reducing the intensity of the wake effect.

[0023] Preferably, the surfaces of the leading edge and the trailing edge are made of an elastic material.

[0024] In this solution, the above-mentioned structure is adopted, and the surfaces of the leading and trailing edges are flexible. When the wake and eddy current of the fan rotor hit the surface, the surface undergoes slight elastic deformation, which further reduces the impact intensity of the wake.

[0025] Preferably, the surface of the leading edge portion is provided with a plurality of circular holes.

[0026] In this design, the aforementioned structure is used, and the surface of the leading edge of the blade has a large number of small circular holes, which can increase air damping and reduce noise.

[0027] Preferably, the surface of the rear edge portion is provided with a plurality of circular holes.

[0028] In this scheme, the above structure is adopted, and small circular holes are designed at the trailing edge to achieve a secondary noise reduction effect when the noise is attenuated by the leading edge of the blade and then interacts with the trailing edge.

[0029] Preferably, the surface of the leading edge portion is provided with a plurality of through holes, the interior of the leading edge portion is filled with a porous medium, and the through holes can be connected to the porous medium.

[0030] In this solution, the above structure is used, and the through holes and porous media form a channel, so that noise can be absorbed by entering the internal porous media, thereby achieving a noise reduction effect.

[0031] Preferably, the surface of the rear edge portion is provided with a plurality of through holes, the interior of the rear edge portion is filled with a porous medium, and the through holes can be connected to the porous medium.

[0032] In this scheme, the above structure is adopted, and the noise is attenuated by the leading edge of the blade and then interacts with the trailing edge to achieve secondary noise reduction.

[0033] The positive and progressive effects of this invention are as follows: This invention discloses a stator guide vane, wherein the leading edge and trailing edge of the vane are connected by an elastic part. When the fan rotor wake acts on the surface of the leading edge of the guide vane, it will compress the leading edge to move backward, while the elastic part can elastically absorb energy and effectively dissipate energy, thereby reducing the intensity of the wake impact and reducing rotor-stator interference noise. Attached Figure Description

[0034] Figure 1This is a schematic diagram of the installation state of the stator guide vane according to a preferred embodiment of the present invention.

[0035] Figure 2 This is a schematic diagram of the cross-sectional structure of the stator guide vane according to a preferred embodiment of the present invention.

[0036] Figure 3 This is a schematic diagram of the installation state of the stator guide vane according to another preferred embodiment of the present invention.

[0037] Figure 4 This is a schematic diagram of the cross-sectional structure of the stator guide vane according to another preferred embodiment of the present invention.

[0038] Figure 5 This is a schematic diagram of the controllable hydraulic telescopic rod according to an embodiment of the present invention.

[0039] Explanation of reference numerals in the attached figures:

[0040] Stator guide vane 1

[0041] Fan rotor blades 2

[0042] Turbo Engine 3

[0043] Tail 4

[0044] Vortex 5

[0045] Leading edge 10

[0046] Anterior chamber 11

[0047] Through hole 12

[0048] Porous media 13

[0049] 20 posterior margin

[0050] Posterior chamber 21

[0051] Elastic part 30

[0052] Spring 31

[0053] Sleeve 32

[0054] Telescopic pole 33 Detailed Implementation

[0055] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0056] Example 1

[0057] In this embodiment, the stator guide vane 1 is installed in a turbine engine 3 in the aviation field. The airflow enters the engine through the fan rotor blade 2 of the turbine engine 3. The stator guide vane 1 is installed at the rear of the fan rotor blade 2 inside the turbine engine 3. In use, the wake 4 and vortex 5 of the fan rotor blade 2 will hit the leading edge 10 of the stator guide vane 1 and generate noise.

[0058] like Figure 1 , 2 As shown, the stator guide vane 1 in this embodiment includes a leading edge portion 10, a trailing edge portion 20, and an elastic portion 30. The leading edge portion 10 is located at the end of the stator guide vane 1 facing the airflow inlet (i.e., Figure 1 (In the direction of the fan rotor blade 2), the trailing edge 20 is located at the end of the stator guide vane 1 facing away from the airflow inlet, and the leading edge 10 is connected to the trailing edge 20 through the elastic part 30. The elastic part 30 can apply a spring force toward the airflow inlet to the leading edge 10.

[0059] In this embodiment, the leading edge 10 is movable, while the trailing edge 20 is fixed inside the engine. The leading edge 10 and the trailing edge 20 are arranged along the airflow direction. The leading edge 10 is connected to the trailing edge 20 by an elastic part 30, and can move slightly towards the trailing edge 20 along the airflow direction within the deformation range of the elastic part 30, thus driving the elastic part 30 to deform.

[0060] When the fan rotor wake 4 acts on the surface of the leading edge 10 of the guide stator blade, the kinetic energy of the airflow in the wake 4 acts on the leading edge 10 and squeezes the leading edge 10 to move towards the trailing edge 20. The elastic part 30 is squeezed and deformed by the leading edge 10 to absorb energy, which can effectively dissipate energy, thereby reducing the intensity of the impact of the wake 4 and thus reducing the interference noise of the rotor stator.

[0061] like Figure 1 , 2 As shown, the leading edge portion 10 includes a leading edge chamber, and the trailing edge portion 20 is embedded in the leading edge chamber.

[0062] In this embodiment, the inner side of the end of the leading edge portion 10 facing the trailing edge portion 20 is hollow to form a leading edge chamber. The end of the leading edge portion 10 facing the trailing edge portion 20 is open to form an opening of the leading edge chamber. The diameter of this opening is the same as the diameter of the opening of the trailing edge portion 20 facing the leading edge portion 10, so that one end of the trailing edge portion 20 can be embedded in the leading edge chamber to form a stator guide vane 1 with the leading edge portion 10. During connection, the leading edge portion 10 is sleeved on one end of the trailing edge portion 20, so that the joint between the two is not exposed on the outer surface, which can prevent the joint between the leading edge portion 10 and the trailing edge portion 20 from affecting the aerodynamic performance of the fan.

[0063] like Figure 1 , 2As shown, the leading edge portion 10 includes a leading edge chamber, and the elastic portion 30 is disposed in the leading edge chamber; and / or the trailing edge portion 20 includes a trailing edge chamber, and the elastic portion 30 is disposed in the trailing edge chamber.

[0064] In this embodiment, both the leading edge portion 10 and the trailing edge portion 20 have chambers. The inner side of the trailing edge portion 20 facing the leading edge portion 10 is hollow to form a trailing edge chamber, and the end of the trailing edge portion 20 facing the leading edge portion 10 is open to form an opening for the trailing edge chamber. The leading edge portion 10 is fitted onto the trailing edge portion 20 through the leading edge chamber, such that a portion of the trailing edge chamber extends into the leading edge chamber, and the leading edge chamber and the trailing edge chamber are in communication. An elastic element is disposed inside the leading edge chamber and the trailing edge chamber within the blade to connect the leading edge portion 10 and the trailing edge portion 20.

[0065] By placing the elastic part 30 inside the leading edge 10 and trailing edge 20 of the stator guide vane 1, the elastic part 30 can be prevented from being exposed on the blade surface, thus avoiding affecting the aerodynamic performance of the blade.

[0066] like Figure 1 , 2 As shown, the elastic part 30 includes one or more springs 31, with the two ends of the springs 31 connected to the leading edge part 10 and the trailing edge part 20, respectively.

[0067] In this embodiment, multiple springs 31 are disposed within the leading edge chamber 11 and the trailing edge chamber 21, and are respectively connected to the leading edge portion 10 and the trailing edge portion 20. The springs 31 are evenly distributed on the inner end faces of the leading edge chamber 11 and the trailing edge chamber 21, which can make the force distribution more uniform. The leading edge portion 10 of the blade can be evenly subjected to the elastic force of the elastic part 30, resulting in better energy dissipation effect of the elastic part 30.

[0068] Using spring 31 as an elastic element to connect the front edge 10 and the rear edge 20 is cost-effective, and the process is simple and easy to implement.

[0069] like Figure 1 , 2 As shown, multiple springs 31 are arranged parallel to each other and spaced apart.

[0070] In this embodiment, multiple springs 31 are connected in parallel to form a spring 31 array. When the fan rotor wake 4 acts on the surface of the guide stator blade, it will squeeze the leading edge chamber to move backward, while the spring 31 array can elastically absorb energy and effectively dissipate energy, thereby reducing the intensity of the wake 4.

[0071] like Figure 1 , 2 As shown, the surfaces of the leading edge portion 10 and the trailing edge portion 20 are made of elastic material.

[0072] In this embodiment, the surface material of the leading edge 10 and trailing edge 20 of the blade is made of alloy with the alloy process to increase the flexibility of the alloy. The surface of the leading edge 10 and trailing edge 20 is flexible. When the wake 4 and eddy 5 of the fan rotor hit the surface, the surface undergoes slight elastic deformation, which further reduces the impact intensity of the wake 4.

[0073] like Figure 2 As shown, the surface of the leading edge portion 10 is provided with several through holes 12.

[0074] In this embodiment, a large number of through holes 12 are distributed on the surface of the leading edge 10 of the blade. The through holes 12 are evenly distributed along the surface, which can increase air damping and reduce noise.

[0075] like Figure 2 As shown, the surface of the rear edge portion 20 is provided with several through holes 12.

[0076] In this embodiment, through holes 12 are also designed in the trailing edge portion 20, which can achieve the effect of secondary noise reduction when the noise is attenuated by the leading edge of the blade and then interacts with the trailing edge.

[0077] like Figure 2 As shown, the surface of the leading edge portion 10 is provided with several through holes 12, and the interior of the leading edge portion 10 is filled with a porous medium 13, and the through holes can be connected to the porous medium 13.

[0078] In this embodiment, the through hole 12 can be directed to the interior of the leading edge portion 10. The contents of the leading edge portion 10 are filled with a porous medium 13, so that the through hole 12 and the porous medium 13 form a channel, allowing noise to be absorbed through the porous medium 13, thereby achieving a noise reduction effect.

[0079] In other embodiments, only circular holes may be provided on the surface without connecting to the inside of the blade, and the blade may not be filled with a porous medium.

[0080] like Figure 2 As shown, the rear edge portion 20 has several through holes 12 on its surface, and the interior of the rear edge portion 20 is filled with a porous medium 13, with the through holes being able to connect to the porous medium 13.

[0081] In this embodiment, the through hole is the through hole 12 opened on the surface of the trailing edge 20, and its effect is the same as that of the leading edge 10. The trailing edge 20 is also filled with a porous medium 13, which can make the noise attenuated by the leading edge of the blade and then achieve secondary noise reduction when it interacts with the trailing edge.

[0082] Example 2

[0083] like Figures 3 to 5As shown, the stator guide vane 1 of this embodiment has a structure that is largely the same as that of the embodiment. The difference is that the elastic part of this embodiment is a controllable hydraulic telescopic rod, including a telescopic rod 33 and a sleeve 32. The telescopic rod 33 and the sleeve 32 are respectively disposed in the leading edge chamber 11 and the trailing edge chamber 21. The telescopic rod 33 is movably disposed in the sleeve 32, and the sleeve 32 can apply a force to the telescopic rod 33 to extend it.

[0084] like Figure 4 As shown, in this embodiment, the sleeve 32 is disposed within the leading edge chamber 11 and connected to one end of the leading edge chamber 11. One end of the telescopic rod 33 extends into the sleeve 32 and is confined within the sleeve 32, while the other end extends into the trailing edge chamber 21 and is connected to one end of the trailing edge chamber 21. The telescopic rod 33 can extend into or into the sleeve 32, and a force can be applied to the sleeve 32 to keep it in the extended state.

[0085] The leading edge 10 and the trailing edge 20 are connected by a controllable hydraulic telescopic rod. The sleeve 32 and the telescopic rod 33 are respectively disposed in the leading edge chamber 11 and the trailing edge chamber 21. When the leading edge moves to the trailing edge, the telescopic rod 33 can be pressed into the sleeve 32. When the wake hits the leading edge surface, the controllable hydraulic telescopic rod assembly can effectively dissipate energy, reduce the intensity of the wake impacting the stator, and reduce rotor-stator interference noise.

[0086] like Figure 5 As shown, the sleeve 32 and the telescopic rod 33 are hydraulically driven.

[0087] In this embodiment, the controllable hydraulic telescopic rod is as follows: Figure 5 As shown, sleeve 32 is a hydraulic cylinder and telescopic rod 33 is a hydraulic rod. By adjusting the hydraulic pressure, the extension or retraction of telescopic rod 33 and the elasticity of the entire controllable hydraulic telescopic rod can be controlled, ensuring that the controllable hydraulic telescopic rod can undergo small elastic deformation under the action of the rotor wake, thus achieving small extension and shortening.

[0088] The telescopic rod 33 inside the sleeve 32 is extended outward by hydraulic drive, which has high strength and can meet the elastic strength requirements.

[0089] like Figure 4 As shown, multiple sleeves 32 and telescopic rods 33 are arranged parallel to each other and spaced apart.

[0090] In this embodiment, multiple sets of controllable hydraulic telescopic rods are provided in the leading edge chamber 11 and the trailing edge chamber 21. The sleeves 32 and telescopic rods 33 are respectively arranged in parallel in the leading edge chamber 11 and the trailing edge chamber 21, and are evenly distributed to form an array.

[0091] The array connection formed by multiple sets of controllable hydraulic telescopic rods results in higher strength, better connection effect, and higher energy release efficiency.

[0092] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A stator guide vane, characterized in that, It includes a leading edge, a trailing edge, and an elastic part. The leading edge is located at the end of the stator guide vane facing the airflow inlet, and the trailing edge is located at the end of the stator guide vane facing away from the airflow inlet. The leading edge is connected to the trailing edge through the elastic part. The leading edge can move towards the trailing edge along the airflow direction within the deformation range of the elastic part. The elastic part can apply a spring force to the leading edge in the direction of the airflow inlet. The surface of the leading edge is provided with several through holes, and the interior of the leading edge is filled with a porous medium. The through holes can be connected to the porous medium. The surface of the rear edge portion is provided with several through holes, and the interior of the rear edge portion is filled with a porous medium. The through holes are able to conduct to the porous medium. The noise is absorbed and attenuated by the porous medium inside the leading edge, and then absorbed by the porous medium inside the trailing edge to achieve secondary noise reduction.

2. The stator guide vane as described in claim 1, characterized in that, The leading edge portion includes a leading edge chamber, and the trailing edge portion is embedded in the leading edge chamber.

3. The stator guide vane as described in claim 1, characterized in that, The leading edge portion includes a leading edge chamber, and the elastic portion is disposed within the leading edge chamber; and / or The trailing edge portion includes a trailing edge chamber, and the elastic portion is disposed within the trailing edge chamber.

4. The stator guide vane as described in claim 3, characterized in that, The elastic part includes a telescopic rod and a sleeve. The telescopic rod and the sleeve are respectively disposed in the front edge chamber and the rear edge chamber. The telescopic rod is movably disposed in the sleeve, and the sleeve can apply a force to the telescopic rod to extend it.

5. The stator guide vane as described in claim 4, characterized in that, The sleeve and the telescopic rod are hydraulically driven.

6. The stator guide vane as described in claim 4, characterized in that, The multiple sleeves and the telescopic rods are arranged parallel to each other and spaced apart.

7. The stator guide vane as described in claim 1, characterized in that, The surfaces of the leading edge and the trailing edge are made of an elastic material.

8. The stator guide vane as described in claim 1, characterized in that, The surface of the leading edge is provided with a plurality of circular holes; and / or The surface of the rear edge portion has several circular holes.

Images