A distributed compressor stator electric drive adjusting mechanism based on a metal centralizer

Abstract

This disclosure relates to the technical field of aero-engine compressor components, and in particular provides a distributed compressor stator electric drive adjustment mechanism based on a metal centralizer. The mechanism includes a linkage ring, which comprises an outer ring, a truss, and a centralizer. The linkage ring is rotatably sleeved on the outside of the casing and drives the stator blades within the casing to rotate. Eight trusses are fixedly installed on the outer ring near the casing, evenly distributed along the circumference of the outer ring, and adjacent trusses are connected by a centralizer. The expansion coefficient of the outer ring is smaller than that of the truss, and the expansion coefficient of the outer ring is smaller than that of the centralizer. This disclosure can reduce the increase in overall deformation caused by local deformation, and improve the overall adjustment accuracy and thermal strain capability of the adjusting stator.

Description

Technical Field

[0001] This disclosure relates to the field of aero-engine compressor component technology, and in particular to a distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer. Background Technology

[0002] The high-pressure compressor is a crucial component of the core engine of an advanced aero-engine, and its performance is key to the efficient and stable operation of the engine. High-pressure compressors operate at relatively high speeds, and their performance is more sensitive to operating conditions and environmental factors than low-pressure compressors. Furthermore, with continuously increasing compressor loads, high-pressure compressors are more prone to instability phenomena such as rotating stall and surge during operation, which can severely impact the reliability and stability of the entire engine compression system.

[0003] As a crucial variable geometry control system within advanced aero-engines, adjustable stator blades are typically designed in the early stages of multi-stage compressors. Through mechanical traction devices and control systems, the stator blade geometry is adjustable. By changing the area of ​​the stator blade throat, the flow rate of the high-pressure compressor is controlled, thereby improving the stability margin of the high-pressure compressor at medium and low speeds and significantly enhancing its variable operating condition performance. The high-pressure compressor's regulating mechanism exhibits significant deformation and poor stability under high-temperature conditions; exceeding certain temperature limits can lead to a substantial decrease in regulating accuracy and effectiveness.

[0004] Optimizing the deformation and stability of the regulating mechanism during high-temperature operation, so as to ensure that the regulating accuracy and effect remain unchanged even at higher compressor operating temperatures, is one of the urgent problems to be solved in this field. Summary of the Invention

[0005] This disclosure is made in view of the above-mentioned problems. This disclosure provides a distributed compressor stator electric drive adjustment mechanism based on a metal centralizer.

[0006] According to one aspect of this disclosure, a distributed compressor stator electric drive adjustment mechanism based on a metal centralizer is provided, including a linkage ring, the linkage ring including 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 inside the casing to rotate.

[0008] The truss is fixedly installed on the side of the outer ring near the casing. There are eight trusses, which are evenly distributed along the circumferential direction of the outer ring. Adjacent trusses are connected by the straightener.

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

[0010] Furthermore, according to one aspect of this disclosure, the distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer has a C-shaped cross-section; one end of the centralizer has a first bend and the other end has a second bend, the first bend and the second bend being respectively used for fixed connection with two adjacent trusses.

[0011] Furthermore, according to one aspect of this disclosure, the distributed compressor stator electric drive adjustment mechanism based on a metal centralizer further includes a drive assembly comprising a linear drive motor and a connecting rod; the linear drive motor is fixedly mounted on the casing, 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] Furthermore, according to one aspect of this disclosure, in a distributed compressor stator electric drive adjustment mechanism based on a metal centralizer, there are multiple drive components, which are evenly distributed along the circumferential direction of the casing.

[0013] Furthermore, according to one aspect of this disclosure, in a distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer, 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, the other end of which is hinged to the outer ring.

[0014] Furthermore, according to one aspect of this disclosure, a distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer is provided on the truss, and there are multiple first mounting holes 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 by a connecting shaft passing through the corresponding first mounting hole and the second mounting hole; the rocker arm is hinged to the connecting shaft.

[0015] Furthermore, according to one aspect of this disclosure, a distributed compressor stator electric drive adjustment mechanism based on a metal centralizer is provided on the truss between two adjacent first mounting holes, the notch being located on the side of the truss away from the casing.

[0016] Furthermore, according to one aspect of this disclosure, the distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer includes a truss comprising a base plate, a top plate, and two side plates; the base plate is arranged parallel to the top plate, the side plates connect the top plate and the base plate, and the two side plates are respectively located on both sides of the top plate.

[0017] Furthermore, according to one aspect of this disclosure, a distributed compressor stator electric drive adjustment mechanism based on a metal centralizer has a protective block on the side of the centralizer near the casing.

[0018] Furthermore, according to one aspect of this disclosure, the distributed compressor stator electric drive adjustment mechanism based on a metal centralizer is wherein the outer ring and the protective block are both made of a mixture of carbon fiber reinforced composite material with low thermal deformation and metal, and the truss and the centralizer are both made of metal.

[0019] This disclosure involves installing multiple trusses on the inner wall of the outer ring, connected by centralizers. The expansion coefficients of both the trusses and the centralizers are greater than that of the outer ring. Utilizing the bimetallic effect, when the outer ring and trusses expand due to heat, especially at locally high temperatures, the presence of the trusses limits excessive local expansion deformation of the outer ring. This reduces the tangential force and circumferential deformation generated by circumferential motion at the linkage ring location, minimizing the increase in overall deformation due to local deformation, and improving the overall adjustment accuracy and thermal strain capacity of the adjusting stator. Attached Figure Description

[0020] The above and other objects, features, and advantages of this disclosure will become more apparent from the more detailed description of the embodiments thereof in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0021] Figure 1 This is a schematic diagram of a distributed compressor stator electric drive adjustment mechanism based on a metal centralizer disclosed in this publication.

[0022] Figure 2 yes Figure 1 The main view.

[0023] Figure 3 yes Figure 2 The left view.

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

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

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

[0027] Figure 7 This is a schematic diagram of the centralizer.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1-Linkage ring, 2-Outer ring, 3-Trunk, 4-Straightener, 5-Casing, 6-Stationary blade, 7-Linear drive motor, 8-Connecting rod, 9-Shaft, 10-Rocker arm, 11-Connecting shaft, 12-First mounting hole, 13-Notch, 14-Protective block, 15-Bracket, 31-Base plate, 32-Top plate, 33-Side plate, 41-First bend, 42-Second bend. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this disclosure more apparent, exemplary embodiments according to this disclosure will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this disclosure, and not all embodiments of this disclosure. It should be understood that this disclosure is not limited to the exemplary embodiments described herein.

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

[0032] The linkage ring 1 is rotatably sleeved on the outside of the casing 5. The linkage ring 1 is used to drive the stationary blade 6 inside the casing 5 to rotate. The truss 3 is fixedly installed on the side of the outer ring 2 near the casing 5. There are eight trusses 3, which are evenly distributed along the circumference of the outer ring 2. Adjacent trusses 3 are connected by a straightener 4. The cross-section of the straightener 4 is C-shaped. One end of the straightener 4 has a first bend 41 and the other end has a second bend 42. The first bend 41 and the second bend 42 are respectively used to fixally connect with two adjacent trusses 3.

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

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

[0035] The combination of truss 3 and outer ring 2, as well as the design of the centralizer 4, both utilize the bimetallic effect. The bimetallic effect refers to the phenomenon where, when two materials with different coefficients of thermal expansion form a composite structure, the different coefficients cause the two metals to deform to different degrees under thermal stress during heating, leading to the entire composite structure bending towards the side with the smaller coefficient of thermal expansion. Taking an example with eight trusses 3, where trusses 3 and outer ring 2 are made of different materials, the bimetallic effect allows the linkage ring 1 to transform into an approximately octagonal structure during thermal strain, concentrating stress at the corners of the octagon. The centralizer 4, acting as an octagonal connector, alleviates the significant stress transmitted to this area due to the heating of the linkage ring 1. Through structural optimization, the centralizer 4 can withstand the corresponding load. Simultaneously, because the casing 5 expands outwards when heated, the bending structure design of the centralizer 4 ensures that the bottom of the centralizer 4 moves radially during the transformation of the linkage ring 1 from a circle to an octagon, maintaining a proper clearance 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 centralizer 4 and the housing 5 can provide support for the linkage ring, while avoiding large-scale deformation of the linkage ring, which would affect the adjustment accuracy.

[0036] Furthermore, it also includes a drive assembly, which includes a linear drive motor 7 and a connecting rod 8. The motor 7 is fixedly mounted on the housing 5 via a mounting base. The linear drive motor 7 is arranged tangentially to the housing 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. In one embodiment, a first connecting hole is provided on the output shaft of the linear drive motor 7, and 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 via a pin passing through the first connecting hole and the second connecting hole. The connecting rod 8 can rotate around the center line of the pin. A third connecting hole is provided on the other end of the connecting rod 8. A bracket 15 is fixedly provided 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. The connecting rod 8 can rotate around the connecting shaft.

[0037] In order to have sufficient driving force and ensure the ability to adjust under high speed and high load conditions, there are multiple drive components. These multiple drive components are evenly distributed along the circumferential direction of the casing 5. Here, four are taken as an example.

[0038] 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. The other end of the rocker arm 10 is hinged to the outer ring 2. The truss 3 has multiple first mounting holes 12, which are arranged along the length of the truss 3. The outer ring 2 has second mounting holes corresponding to the first mounting holes 12. The truss 3 is fixedly connected to the outer ring 2 through the corresponding first mounting holes 12 and second mounting holes via a 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. The linkage ring 1 drives the stationary blade 6 to rotate through the rocker arm 10. At the same time, the linkage ring 1 will also undergo axial translation.

[0040] In 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 notch 13 can reduce the weight of the truss 3. On the other hand, providing a notch 13 between two adjacent first mounting holes 12 can also provide space for thermal deformation of the outer ring between the two adjacent first mounting holes 12, so as to minimize the amount of deformation of the outer ring in the circumferential direction at that point.

[0041] To further reduce the weight of truss 3, truss 3 is designed as a hollow structure. Specifically, 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, and the side plates 33 connect the top plate 32 and the bottom plate 31. The two side plates 33 are located on both sides of the top plate 32.

[0042] To prevent friction between the centralizer 4 and the housing 5 during thermal expansion, a protective block 14 is provided on the side of the centralizer 4 closest to the housing 5. The protective block 14 is made of a carbon fiber reinforced composite material with low thermal deformation mixed with metal.

[0043] The distributed truss design allows for pre-reserved circumferential clearances, reducing tangential stress and overall circumferential deformation. This mitigates the effects of thermal stress and strain on the components of the adjustment mechanism, stabilizes the circumferential position of the linkage ring at the centralizer location, significantly reduces circumferential deformation, and decreases damping at the contact surface between the adjustment mechanism and the casing, thereby improving adjustment efficiency and accuracy. The hybrid material design generates a bimetallic effect, reducing its own thermal stress. This also reduces the weight of the adjustment mechanism, contributing to engine weight reduction.

[0044] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0045] The block diagrams of devices, apparatuses, devices, and systems disclosed herein are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0046] Additionally, as used herein, the "or" used in a list of items beginning with "at least one" indicates a separate list, such that a list of, for example, "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 imply that the described example is preferred or better than other examples.

[0047] It should also be noted that in the systems and methods of this disclosure, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions to this disclosure.

[0048] Various changes, substitutions, and modifications can be made to the technology described herein without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of this disclosure is not limited to the specific aspects of the processes, machines, manufactures, events, means, methods, and actions described above. Currently existing or later-developed processes, machines, manufactures, events, means, methods, or actions that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein can be utilized. Therefore, the appended claims include such processes, machines, manufactures, 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 this 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 this disclosure. Therefore, this disclosure is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0050] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this disclosure to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. A distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer, characterized in that, It includes a linkage ring (1), which includes an outer ring (2), a truss (3) and a straightener (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 blade (6) inside the casing (5) to rotate. The truss (3) is fixedly installed on the side of the outer ring (2) near the casing (5). There are multiple trusses (3), which are evenly distributed along the circumferential direction of the outer ring (2). Adjacent trusses (3) are connected by the straightener (4). The expansion coefficients of the truss (3) and the stabilizer (4) are both greater than the expansion coefficient of the outer ring (2); The cross-section of the straightener (4) is C-shaped; one end of the straightener (4) has a first bend (41) and the other end has a second bend (42), the first bend (41) and the second bend (42) are respectively used to fix and connect with the two adjacent trusses (3); The stabilizer (4) has a protective block (14) on the side near the casing (5). The outer ring (2) and the protective block (14) are both made of carbon fiber reinforced composite material mixed with metal, and the truss (3) and the straightener (4) are both made of metal. During the process of the linkage ring (1) changing from a circle to an octagon, the bottom of the straightener (4) will move radially, ensuring the normal gap between the straightener (4) and the casing (5).

2. The distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer according to claim 1, characterized in that, It also includes a drive assembly, which includes a linear drive motor (7) and a connecting rod (8); the linear drive motor (7) is fixedly mounted on the housing (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).

3. The distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer according to claim 2, characterized in that, There are multiple drive components, and the multiple drive components are evenly distributed along the circumferential direction of the casing (5).

4. The distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer according to claim 3, 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), the other end of which is hinged to the outer ring (2).

5. The distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer according to claim 4, characterized in that, The truss (3) is provided with a first mounting hole (12), and there are multiple first mounting holes (12), which 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 second mounting hole via a connecting shaft (11); the rocker arm (10) is hinged to the connecting shaft (11).

6. The distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer according to claim 5, 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 the side of the truss (3) away from the casing (5).

7. The distributed compressor stator blade electric drive adjustment mechanism based on a metal centralizer according to claim 6, characterized in that, 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 plates (33) connect the top plate (32) and the bottom plate (31), and the two side plates (33) are located on both sides of the top plate (32).

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