Distributed gas compressor stationary blade electric drive adjusting mechanism based on metal centralizer

Abstract

The invention relates to the technical field of aero-engine gas compressor components, in particular to a distributed gas compressor stationary blade electric drive adjusting mechanism based on a metal centralizer, which comprises a linkage ring, and the linkage ring comprises an outer ring, a truss and a centralizer; the linkage ring is rotationally arranged outside the casing in a sleeving manner, and the linkage ring is used for driving a stationary blade in the casing to rotate; the trusses are fixedly installed on the side, close to the cartridge receiver, of the outer ring, the number of the trusses is eight, the eight trusses are evenly distributed in the circumferential side direction of the outer ring, and every two adjacent trusses are connected through a centralizer. The expansion coefficient of the outer ring is larger than that of the truss and that of the centralizer. According to the invention, the overall deformation increase caused by local deformation can be reduced, and the overall adjustment precision and thermal strain capacity of the stator can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of aircraft engine compressor components, and in particular to a distributed compressor stator electric drive regulating mechanism based on a metal centralizer. Background Art

[0002] The high-pressure compressor is one of the important components of the core engine of advanced aircraft engines, and its performance is the key to whether advanced aircraft engines can work efficiently and stably. The operating speed of the high-pressure compressor is relatively high, and its performance is more sensitive to factors such as operating conditions and environmental conditions than the low-pressure compressor; in addition, as the compressor load continues to increase, this will cause the high-pressure compressor to be more prone to unstable phenomena such as rotating stall and surge during operation, which may even affect the operating reliability and stability of the overall compression system of the engine in severe cases.

[0003] As one of the important variable geometry control systems in advanced aircraft engines, adjustable stator blades are usually designed in the first few stages of multi-stage compressors. The stator blade geometry is adjustable through mechanical traction devices and control systems. The flow of the high-pressure compressor is controlled by changing the area of ​​the stator blade throat, thereby improving the stable working margin of the high-pressure compressor at medium and low speeds, and greatly improving its variable operating performance. The high-pressure compressor adjustment mechanism has a large deformation and poor stability when working in a high-temperature environment. If it exceeds a certain temperature limit, the adjustment accuracy and adjustment effect may be greatly reduced.

[0004] How to optimize the deformation and stability of the regulating mechanism when working at high temperatures so that the regulating accuracy and regulating effect can still be guaranteed at higher compressor operating environment temperatures is one of the problems that need to be solved urgently in this field. Summary of the invention

[0005] The present disclosure is proposed in view of the above problems. The present disclosure provides a distributed compressor stator electric drive adjustment mechanism based on a metal centralizer.

[0006] According to one aspect of the present disclosure, there is provided a distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer, comprising a linkage ring, wherein the linkage ring comprises an outer ring, a truss and a centralizer;

[0007] The linkage ring is rotatably sleeved on the outside of the casing, and the linkage ring is used to drive the stationary blades in the casing to perform rotational motion;

[0008] The trusses are fixedly mounted on a side of the outer ring close to the casing, there are eight trusses, the eight trusses are evenly distributed along the circumference of the outer ring, and two adjacent trusses are connected via the centralizer;

[0009] The expansion coefficient of the outer ring is greater than the expansion coefficient of the truss, and the expansion coefficient of the outer ring is greater than the expansion coefficient of the centralizer.

[0010] In addition, according to one aspect of the present disclosure, a distributed compressor stator electric drive adjustment mechanism based on a metal stabilizer, the cross-section of the stabilizer is C-shaped; one end of the stabilizer has a first bending portion and the other end has a second bending portion, and the first bending portion and the second bending portion are respectively used to be fixedly connected to the two adjacent trusses.

[0011] In addition, according to one aspect of the present disclosure, the distributed compressor stator blade electric drive adjustment mechanism based on a metal stabilizer also includes a drive assembly, which includes a linear drive motor and a connecting rod; the linear drive motor is fixedly mounted on the casing, and the output shaft of the linear drive motor is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the linkage ring.

[0012] In addition, according to a distributed compressor stator blade electric drive adjustment mechanism based on a metal stabilizer in one aspect of the present disclosure, there are multiple drive assemblies, and the multiple drive assemblies are evenly distributed along the circumferential direction of the casing.

[0013] In addition, according to an aspect of the distributed compressor stator blade electric drive adjustment mechanism based on a metal stabilizer of the present disclosure, the rotating shaft of the stator blade passes through and extends out of the casing and is fixedly connected to one end of a rocker arm, and the other end of the rocker arm is hinged to the outer ring.

[0014] In addition, according to an aspect of the distributed compressor stator electric drive adjustment mechanism based on a metal stabilizer of the present disclosure, a first mounting hole is provided on the truss, and there are multiple first mounting holes, and the multiple first mounting holes are arranged along the length direction of the truss; a second mounting hole corresponding to the first mounting hole is provided on the outer ring, and the truss is fixedly connected to the outer ring through a connecting shaft passing through the corresponding first mounting hole and second mounting hole; the rocker arm is hinged to the connecting shaft.

[0015] In addition, according to the distributed compressor stator blade electric drive adjustment mechanism based on a metal stabilizer in one aspect of the present disclosure, a gap is provided between two adjacent first mounting holes on the truss, and the gap is located on a side of the truss away from the casing.

[0016] In addition, according to an aspect of the distributed compressor stator blade electric drive adjustment mechanism based on a metal stabilizer of the present disclosure, the truss includes a bottom plate, a top plate and two side plates; the bottom plate is arranged parallel to the top plate, the side plate connects the top plate and the bottom plate, and the two side plates are respectively located on both sides of the top plate.

[0017] In addition, according to the distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer according to one aspect of the present disclosure, a protective block is provided on a side of the centralizer close to the casing.

[0018] In addition, according to an aspect of the distributed compressor stator electric drive adjustment mechanism based on a metal stabilizer of the present disclosure, the outer ring and the protective block are both made of a mixture of carbon fiber reinforced composite materials with small thermal deformation and metal, and the truss and the stabilizer are both made of metal.

[0019] The present invention provides a plurality of trusses on the inner wall of the outer ring, and the trusses are connected by a centralizer, and the expansion coefficient of the trusses and the expansion coefficient of the centralizer are both smaller than the expansion coefficient of the outer ring. By utilizing the bimetallic effect, when the outer ring and the trusses expand due to heat, especially when the local temperature is high, the existence of the trusses can limit the local expansion and deformation of the outer ring from being too large, and can reduce the tangential force and circumferential deformation caused by the circumferential movement at the position of the linkage ring, reduce the increase in the overall deformation caused by the local deformation, and improve the overall adjustment accuracy and thermal strain capacity of the regulating stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other purposes, features and advantages of the present disclosure will become more apparent by describing the embodiments of the present disclosure in more detail in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0021] Figure 1 It is a structural schematic diagram of a distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer disclosed in the present invention.

[0022] Figure 2 yes Figure 1 main view.

[0023] Figure 3 yes Figure 2 Left view of .

[0024] Figure 4 It is a schematic diagram of the installation structure of the linear drive motor and the casing.

[0025] Figure 5 It is a schematic diagram of the installation structure of the outer ring, rocker arm and truss.

[0026] Figure 6 It is a structural diagram of a truss.

[0027] Figure 7 It is a structural diagram of the centralizer.

[0028] Description of reference numerals:

[0029] 1-linkage ring, 2-outer ring, 3-truss, 4-centralizer, 5-casing, 6-stationary blade, 7-linear drive motor, 8-connecting rod, 9-rotating shaft, 10-rocker arm, 11-connecting shaft, 12-first mounting hole, 13-notch, 14-protective block, 15-bracket, 31-bottom plate, 32-top plate, 33-side plate, 41-first bending portion, 42-second bending portion. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present disclosure more obvious, the exemplary embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure, and it should be understood that the present disclosure is not limited to the exemplary embodiments described here.

[0031] See also Figure 1-Figure 7 As shown, the present disclosure discloses a distributed compressor stator blade electric drive adjustment mechanism based on a metal stabilizer, including a linkage ring 1, and the linkage ring 1 includes an outer ring 2, a truss 3 and a stabilizer 4.

[0032] The linkage ring 1 is rotatably sleeved on the outside of the casing 5, and the linkage ring 1 is used to drive the stationary blades 6 in the casing 5 to rotate; the trusses 3 are fixedly installed on the side of the outer ring 2 close to the casing 5, there are eight trusses 3, and the eight trusses 3 are evenly distributed along the circumferential direction of the outer ring 2, and the adjacent trusses 3 are connected by a stabilizer 4; the cross-section of the stabilizer 4 is C-shaped; one end of the stabilizer 4 has a first bending portion 41 and the other end has a second bending portion 42, the first bending portion 41 and the second bending portion 42 are respectively used to be fixedly connected with the two adjacent trusses 3.

[0033] The expansion coefficient of the outer ring 2 is greater than that of the truss 3, and the expansion coefficient of the outer ring 2 is greater than that of the centralizer 4. The outer ring 2 is made of a carbon fiber reinforced composite material with small thermal deformation and a metal mixture, and the truss 3 and the centralizer 4 are both made of metal.

[0034] Its main working principle is to introduce a tangential throwing force to the linkage ring 1 through the truss 3, which can weaken the tangential force and circumferential deformation generated by the circumferential movement at the selected position of the linkage ring 1 of the casing 5, reduce the increase in the overall deformation caused by local deformation, and improve the overall adjustment accuracy and thermal strain capacity of the adjustable stator blade 6.

[0035] The combination of truss 3 and outer ring 2, and the design of centralizer 4 all utilize the bimetallic effect. The bimetallic effect refers to the fact that when two materials with different expansion coefficients form a composite structure, during the heating process, due to the different expansion coefficients of the two metals, the two metals will deform to different degrees under the action of thermal stress, and then the entire composite structure will bend toward the side of the material with a smaller expansion coefficient. Taking the number of trusses 3 as 8 as an example, the trusses 3 and outer ring 2 are made of different materials. By utilizing the bimetallic effect, the shape of the linkage ring 1 can be transformed into an approximate "octagonal" structure when thermal strain occurs, and the stress is concentrated at the corners of the octagon. The centralizer 4, which is connected as an octagon, can alleviate the huge stress transmitted to the linkage ring 1 due to the heating. Through structural optimization, the centralizer 4 can withstand the corresponding load. At the same time, since the casing 5 will expand outward when heated, the bending structure design of the centralizer 4 makes the bottom of the centralizer 4 move radially during the process of the linkage ring 1 changing from a circle to an octagon, ensuring the normal gap between the centralizer 4 and the casing 5. In addition, since the radial dimension of the linkage ring 1 is relatively large, the sliding between the stabilizer 4 and the casing 5 can provide support for the linkage ring, while preventing the linkage ring from undergoing large-scale deformation that would affect the adjustment accuracy.

[0036] Furthermore, it also includes a driving assembly, which includes a linear drive motor 7 and a connecting rod 8; the machine 7 is fixedly mounted on the casing 5 through a mounting seat, the linear drive motor 7 is arranged along the tangent direction of the casing 5, the output shaft of the linear drive motor 7 is hinged to one end of the connecting rod 8, and the other end of the connecting rod 8 is hinged to the linkage ring 1. As an embodiment, a first connecting hole is provided on the output shaft of the linear drive motor 7, a second connecting hole is provided on one end of the connecting rod 8, the output shaft of the linear drive motor 7 is connected to the connecting rod 8 through the first connecting hole and the second connecting hole through a pin shaft, and the connecting rod 8 can rotate around the center line of the pin shaft; a third connecting hole is provided on the other end of the connecting rod 8, a bracket 15 is fixedly mounted on the outer ring 2 of the linkage ring 1, a connecting shaft is provided on the bracket 15, the connecting shaft passes through the third connecting hole and is connected to the connecting rod 8, and the connecting rod 8 can rotate around the connecting shaft.

[0037] In order to have sufficient driving force and ensure the adjustment capability under high speed and high load conditions, there are multiple driving components, and the multiple driving components are evenly distributed along the circumferential direction of the casing 5. Four driving components are taken as an example here.

[0038] The rotating shaft 9 of the stationary blade 6 penetrates and extends out of the casing 5 and is fixedly connected to one end of a rocker arm 10, and the other end of the rocker arm 10 is hinged to the outer ring 2. The truss 3 is provided with a first mounting hole 12, and there are multiple first mounting holes 12, and the multiple first mounting holes 12 are arranged along the length direction of the truss 3; the outer ring 2 is provided with a second mounting hole corresponding to the first mounting hole 12, and the truss 3 is fixedly connected to the outer ring 2 through the corresponding first mounting hole 12 and the second mounting hole through the connecting shaft 11; the rocker arm 10 is hinged to the connecting shaft 11.

[0039] The linear drive motor 7 drives the linkage ring 1 to rotate through the connecting rod 8, and the linkage ring 1 drives the stationary blade 6 to rotate through the rocker arm 10. At the same time, the linkage ring 1 also undergoes axial translation.

[0040] As a preferred embodiment, a notch 13 is provided between two adjacent first mounting holes 12 on the truss 3, and the notch 13 is located on the side of the truss 3 away from the casing 5. The provision of the notch 13 can reduce the weight of the truss 3. On the other hand, the provision of the notch 13 between two adjacent first mounting holes 12 can also provide a space for the outer ring between the two adjacent first mounting holes 12 to deform due to heat, so as to minimize the deformation of the outer ring in the circumferential direction at this location.

[0041] In order to further reduce the weight of the truss 3, the truss 3 is designed to be a hollow structure. Specifically, the truss 3 includes a bottom plate 31, a top plate 32 and two side plates 33; the bottom plate 31 is arranged parallel to the top plate 32, the side plate 33 connects the top plate 32 and the bottom plate 31, and the two side plates 33 are respectively located on both sides of the top plate 32.

[0042] In order to avoid friction between the centralizer 4 and the casing 5 when thermal expansion occurs, a protective block 14 is provided on the side of the centralizer 4 close to the casing 5. The protective block 14 is made of a carbon fiber reinforced composite material with small thermal deformation and a metal.

[0043] Through the distributed truss design, the distributed design can reserve circumferential clearance, reduce tangential stress and overall circumferential deformation, alleviate the influence of thermal stress and strain of each component of the adjustment mechanism, stabilize the circumferential position of the linkage ring at the location of the centralizer, greatly reduce the circumferential deformation, reduce the damping of the contact surface between the adjustment mechanism and the casing, and improve the adjustment efficiency and accuracy. The hybrid material design produces a bimetallic effect to reduce the influence of its own thermal stress. Reduce the weight of the adjustment mechanism and reduce the weight of the engine.

[0044] The basic principles of the present disclosure are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present disclosure are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present disclosure. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, and are not limitations. The above details do not limit the present disclosure to the necessity of adopting the above specific details to be implemented.

[0045] The block diagrams of the devices, apparatuses, equipment, and systems involved in this disclosure are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including," "comprising," "having," and the like are open words, referring to "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or," and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0046] Additionally, as used herein, "or" used in a list of items beginning with "at least one" indicates a separate list, so that, for example, a list of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not mean that the example described is preferred or better than other examples.

[0047] It should also be noted that in the system and method of the present disclosure, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present disclosure.

[0048] Various changes, substitutions, and modifications of the techniques described herein may be made without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of the present disclosure is not limited to the specific aspects of the processes, machines, manufactures, compositions of events, means, methods, and actions described above. Currently existing or later to be developed processes, machines, manufactures, compositions of events, means, methods, or actions that perform substantially the same functions or achieve substantially the same results as the corresponding aspects described herein may be utilized. Thus, the appended claims include such processes, machines, manufactures, compositions of events, means, methods, or actions within their scope.

[0049] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0050] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A distributed compressor stator electric drive adjustment mechanism based on a metal centralizer, characterized in that: It comprises a linkage ring (1), wherein the linkage ring (1) comprises an outer ring (2), a truss (3) and a centralizer (4); The linkage ring (1) is rotatably sleeved on the outside of the casing (5), and the linkage ring (1) is used to drive the stationary blades (6) in the casing (5) to perform rotational motion; The truss (3) is fixedly mounted on a side of the outer ring (2) close to the casing (5), there are a plurality of trusses (3), the plurality of trusses (3) are evenly distributed along the circumferential direction of the outer ring (2), and two adjacent trusses (3) are connected via the centralizer (4); The expansion coefficient of the truss (3) and the expansion coefficient of the centralizer (4) are both smaller than the expansion coefficient of the outer ring (2).

2. The distributed compressor stator blade electric drive adjustment mechanism based on metal centralizer according to claim 1 is characterized in that: The cross section of the centralizer (4) is C-shaped; one end of the centralizer (4) has a first bending portion (41), and the other end has a second bending portion (42); the first bending portion (41) and the second bending portion (42) are respectively used to be fixedly connected to two adjacent trusses (3).

3. The distributed compressor stator blade electric drive adjustment mechanism based on metal centralizer according to claim 1 is characterized in that: It also includes a driving assembly, which includes a linear driving motor (7) and a connecting rod (8); the linear driving motor (7) is fixedly mounted on the casing (5), the output shaft of the linear driving motor (7) is hinged to one end of the connecting rod (8), and the other end of the connecting rod (8) is hinged to the linkage ring (1).

4. The distributed compressor stator blade electric drive adjustment mechanism based on metal centralizer according to claim 3 is characterized in that: There are a plurality of drive assemblies, and the plurality of drive assemblies are evenly distributed along the circumferential direction of the casing (5).

5. The distributed compressor stator blade electric drive adjustment mechanism based on metal centralizer according to claim 3 is characterized in that: The rotating shaft (9) of the stationary blade (6) passes through and extends out of the casing (5) and is fixedly connected to one end of a rocker arm (10), and the other end of the rocker arm (10) is hinged to the outer ring (2).

6. The distributed compressor stator blade electric drive adjustment mechanism based on metal centralizer according to claim 5 is characterized in that: The truss (3) is provided with a first mounting hole (12), and the first mounting holes (12) are multiple, and the multiple first mounting holes (12) are arranged along the length direction of the truss (3); the outer ring (2) is provided with a second mounting hole corresponding to the first mounting hole (12), and the truss (3) is fixedly connected to the outer ring (2) through a connecting shaft (11) passing through the corresponding first mounting hole (12) and the second mounting hole; the rocker arm (10) is hinged to the connecting shaft (11).

7. The distributed compressor stator blade electric drive adjustment mechanism based on metal centralizer according to claim 6 is characterized in that: A notch (13) is provided between two adjacent first mounting holes (12) on the truss (3), and the notch (13) is located on a side of the truss (3) away from the casing (5).

8. The distributed compressor stator blade electric drive adjustment mechanism based on metal centralizer according to claim 7 is characterized in that: The truss (3) comprises a bottom plate (31), a top plate (32) and two side plates (33); the bottom plate (31) is arranged in parallel with the top plate (32), the side plates (33) connect the top plate (32) and the bottom plate (31), and the two side plates (33) are respectively located on both sides of the top plate (32).

9. The distributed compressor stator blade electric drive adjustment mechanism based on metal centralizer according to claim 1 is characterized in that: A protective block (14) is provided on one side of the centralizer (4) close to the casing (5).

10. The distributed compressor stator blade electric drive adjustment mechanism based on metal centralizer according to claim 9, characterized in that: The outer ring (2) and the protective block (14) are both made of a mixture of carbon fiber reinforced composite material and metal, and the truss (3) and the centralizer (4) are both made of metal.

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