A rectifier seal, rectifier and aeroengine

Abstract

The application discloses a rectifier sealing element, a rectifier and an aero-engine, improves compressor working efficiency, improves sealing effect and improves safety of the aero-engine. The technical scheme is as follows: the rectifier fan-shaped segment sealing element comprises a first fan-shaped segment and a second fan-shaped segment, a first upper edge plate and a second upper edge plate which are respectively located at edge portions of the first fan-shaped segment and the second fan-shaped segment and provide installation bases for the sealing element, a sealing boss which is a boss structure added at an edge of the second upper edge plate of the second fan-shaped segment, a sealing groove which is a groove machined along a side surface of the sealing boss and used for accommodating an elastic sealing sheet, the sealing sheet which is fixed at one end of an edge of the first upper edge plate of the first fan-shaped segment and inserted into the sealing groove of the second fan-shaped segment at the other end, a gap which is a gap between adjacent rectifier fan-shaped segment edge plates, and wherein a connection position of the sealing sheet and the sealing groove is designed as a C-shaped structure.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, and in particular to a rectifier seal for an aero-engine compressor. Background Technology

[0002] As a core component of modern aircraft, the performance of aero engines directly impacts the overall performance of the aircraft. Within an aero engine, the compressor's role is to compress the air entering the engine, increasing its pressure and temperature to provide high-pressure air to the combustion chamber. The efficiency and reliability of the compressor are crucial to the overall performance of the engine.

[0003] In compressor design, the rectifier is a key component, typically consisting of multiple sector segments mounted in T-slots on adjacent stage casings. For example... Figure 1 As shown, the rectifier 5 consists of multiple sector segments, which are respectively mounted on the pre-stage casing 6 and the post-stage casing 7. To accommodate the deformation of the casing and the stator sector segments under hot conditions, a gap 4 is designed between the flanges of adjacent sector segments, such as... Figure 2 As shown. However, the presence of these gaps can lead to gas leakage, thereby reducing the compressor's operating efficiency.

[0004] To address this issue, existing technologies employ the method of machining sealing grooves on the fan-shaped segment edge plates. By inserting sealing plates into these grooves, gas leakage from gap 4 can be reduced. While this sealing component reduces gas leakage to some extent, it has several drawbacks. First, ensuring a good fit between the sealing plate and the sealing groove requires precise positioning of the sealing grooves on adjacent fan-shaped segment edge plates. This presents challenges in actual machining and may lead to poor sealing performance. Second, during engine operation, the rectifier fan-shaped segment undergoes thermal expansion and radial deformation, potentially increasing the gap between adjacent edge plates. In this situation, the sealing plate may detach due to its inability to accommodate the increased gap, which not only reduces the sealing effect but could also lead to safety hazards.

[0005] Therefore, there is an urgent need in the existing technology for a new rectifier sealing component to solve the gas leakage problem, while ensuring the stability and reliability of the sealing plate during engine operation. Summary of the Invention

[0006] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0007] The purpose of this invention is to solve the above-mentioned problems by providing a rectifier sealing component to address the issues of gas leakage and sealing plate detachment / loss in the prior art.

[0008] The technical solution of this invention is as follows: This invention discloses a rectifier sector sealing component, comprising:

[0009] First sector segment and second sector segment;

[0010] The first upper edge plate and the second upper edge plate are located at the edge portions of the first sector segment and the second sector segment, respectively, providing an installation base for the sealing component;

[0011] A sealing boss is a boss structure added at the edge of the second upper edge plate of the second sector segment;

[0012] A sealing groove is a groove machined along the side of a sealing boss to accommodate an elastic sealing plate.

[0013] The sealing plate has one end fixed to the edge of the first upper edge plate of the first sector segment, and the other end inserted into the sealing groove of the second sector segment;

[0014] Gap, the gap between adjacent rectifier sector edge plates;

[0015] The connection between the sealing plate and the sealing groove is designed as a C-shaped structure.

[0016] According to one embodiment of the rectifier sector sealing member of the present invention, the sealing sheet is an elastic sealing sheet.

[0017] According to one embodiment of the rectifier sector sealing member of the present invention, the sealing groove is a through groove in the direction of the rectifier centerline.

[0018] According to one embodiment of the rectifier sector sealing member of the present invention, the top of the elastic sealing sheet abuts against the top of the sealing groove to form a sealing member between the first sector and the second sector, allowing good sealing performance to be maintained under thermal expansion and airflow pressure.

[0019] According to one embodiment of the rectifier sector sealing member of the present invention, the gap allows the sector to deform under hot conditions and is a leakage channel that the sealing member needs to control.

[0020] According to one embodiment of the rectifier sector sealing member of the present invention, when gas flows out from the sector gap to the outer edge plate, the top of the sealing plate presses against the top of the sealing groove under the pressure of the airflow, and the gas flowing along the inner surface of the sealing plate flows back from the tail of the C-shaped surface to prevent the gas from flowing out of the sector gap.

[0021] According to one embodiment of the rectifier sector sealing member of the present invention, the first sector and the second sector are connected by the sealing member to reduce gas leakage in the gap.

[0022] The present invention also discloses a rectifier composed of multiple sector segments for guiding and adjusting the airflow inside the compressor. The fore-stage casing and the after-stage casing provide mounting and support for the rectifier. The fore-stage casing is one of the casings on which the rectifier is mounted, located at the front end of the compressor, and the after-stage casing is another casing on which the rectifier is mounted, located at the rear end of the compressor. The rectifier sector segment sealing element is as described above.

[0023] The present invention also discloses an aircraft engine including a rectifier as described above.

[0024] Compared with the prior art, the present invention has the following advantages: The innovation of the rectifier sealing component of the present invention lies in:

[0025] 1. Fix one end of the elastic sealing strip to the edge of the upper edge plate of the sector section, and insert the other end into the sealing groove at the edge of the upper edge plate of the sector section to form a sealing part between adjacent sector sections of the rectifier, thereby reducing the leakage of gas in the main flow channel of the compressor.

[0026] 2. When gas flows out from the gap in the sector section to the outer edge plate, the top of the elastic sealing plate presses against the top of the sealing groove under the airflow pressure, making the seal more reliable;

[0027] 3. The end of the elastic sealing strip connected to the sealing groove is designed in a C-shape. Gas flowing along the inner surface of the sealing strip flows back from the tail of the C-shaped surface, which can further prevent gas from flowing out of the fan-shaped gap.

[0028] In detail, the present invention can achieve the following technical effects:

[0029] This invention reduces the amount of gas leaking from the gaps between the rectifier sector sections in the compressor, thereby improving compressor efficiency. Simultaneously, the sealing strip provides excellent sealing performance and is less prone to detachment due to rectifier deformation, thus enhancing the safety of the aero-engine. Attached Figure Description

[0030] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0031] Figure 1 A schematic diagram showing the rectifier installation location;

[0032] Figure 2 This is a schematic diagram of the gap between the fan-shaped segments;

[0033] Figure 3 This is a schematic diagram of an embodiment of the rectifier sector sealing member of the present invention;

[0034] Figure 4 This is a schematic diagram of the sealing groove of the present invention.

[0035] [Attached image labels]

[0036] 1—The first sector of the rectifier

[0037] 2—The second sector of the rectifier

[0038] 11 — Upper edge plate of the first sector of the rectifier

[0039] 21 — Upper edge plate of the second sector of the rectifier

[0040] 22 - Sealing Protrusion

[0041] 23 - Sealing slot

[0042] 3 - Flexible sealing sheet

[0043] 4—Bladder gap between adjacent rectifier sector sections

[0044] 5—Rectifier

[0045] 6 - Preamplifier Casing

[0046] 7 - Power stage casing Detailed Implementation

[0047] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0048] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] Figure 3 This is one embodiment of the rectifier sector sealing member of the present invention. Please refer to [link / reference]. Figure 3 The sealing component in this embodiment includes:

[0051] Rectifier sector sections 1 and 2: These are the main components that make up the compressor's post-stator rectifier. Each sector section has a specific geometry to accommodate the airflow passage inside the compressor. Sector section 1 and sector section 2 are two adjacent sector sections that together form part of the rectifier, guiding and adjusting the airflow inside the compressor.

[0052] Upper edge plates 11 and 21: Located at the top of the sector segment, these are the edge portions of the sector segment and provide the mounting base for the sealing components. The upper edge plates of sector segment 1 and sector segment 2 respectively feature sealing plates and sealing grooves to achieve the sealing function.

[0053] Sealing boss 22: A boss structure added at the edge of the upper edge plate 21 of the fan-shaped section 2, the side of which is used to process the sealing groove 23, providing a structural foundation for the sealing groove 23.

[0054] Sealing slot 23: such as Figure 4 As shown, the groove machined along the side of the sealing boss 22 is used to accommodate the elastic sealing piece 3 to achieve sealing between the fan-shaped segments. The sealing groove 23 is a through groove in the direction of the rectifier centerline to ensure assembly feasibility.

[0055] Elastic sealing strip 3: A flexible component, one end fixed to the edge of the upper edge plate 11 of sector segment 1, and the other end inserted into the sealing groove 23 of sector segment 2. The top of the elastic sealing strip 3 abuts against the top of the sealing groove 23, forming a seal between sector segments 1 and 2. Its design allows for good sealing performance under thermal expansion and airflow pressure, reducing gas leakage. The seals between the remaining sector segments are the same as described above, forming the seals of this stage of the rectifier.

[0056] Gap 4: The gap between the edge plates of adjacent rectifier sector sections, designed to coordinate the deformation of the casing and stator sector sections under hot conditions, but also serving as a channel for gas leakage. It allows for deformation of the sector sections under hot conditions, while simultaneously acting as a leakage channel that the sealing components need to control.

[0057] The elastic sealing sheet 3 is fixed to the edge of the upper edge plate 11 of the sector segment 1 by welding or riveting.

[0058] The sealing boss 22 is located at the edge of the upper edge plate 21 of the fan-shaped section 2, and a sealing groove 23 is machined on its side.

[0059] One end of the elastic sealing strip 3 is inserted into the sealing groove 23 and abuts against the top of the sealing groove 23 to form a sealing element. The connection between the elastic sealing strip 3 and the sealing groove 23 is designed with a C-shaped structure. When gas flows out from the fan-shaped gap 4 to the outer edge plate, the top of the sealing strip 3 presses against the top of the sealing groove 23 under the pressure of the airflow, making the seal more reliable. Furthermore, the gas flowing along the inner surface of the sealing strip 3 flows back from the tail of the C-shaped surface, which can further hinder the gas from flowing out of the fan-shaped gap.

[0060] Sector 1 and sector 2 are connected by a sealing element to reduce gas leakage in gap 4.

[0061] The rectifier 5 is a component consisting of multiple sector segments used to guide and regulate the airflow inside the compressor. The fore-stage casing 6 and the after-stage casing 7 provide mounting and support for the rectifier. The fore-stage casing 6 is one of the casings for rectifier mounting, located at the front end of the compressor. The after-stage casing 7 is the other casing for rectifier mounting, located at the rear end of the compressor. These sector segments, along with the sealing strip 3, are inserted into the mounting edges of the rectifier 5 on the fore-stage casing 6, and the after-stage casing 7... Figure 1 Load in the direction indicated by the arrow.

[0062] The installation steps of the rectifier sealing component in this embodiment are as follows: First, the sealing plate 3 is fixed to the edge of the upper edge plate of all sector segments 1 to n by pins or welding. Then, sector segments 1 to n and the sealing plate 3 are sequentially inserted into the mounting edge of the rectifier 5 on the casing 6. Then, the casing 7... Figure 1 Load in the direction indicated by the arrow.

[0063] This invention provides a rectifier sealing component, comprising:

[0064] The elastic sealing strip is fixed at one end to the edge of the upper edge plate of the sector segment, and the other end is inserted into the sealing groove at the edge of the upper edge plate of the adjacent sector segment.

[0065] The sealing groove is located on the side of the boss structure at the edge of the upper edge plate of the fan-shaped section;

[0066] The C-shaped structure, with the connection between the elastic sealing plate and the sealing groove designed in a C-shape, enhances the sealing effect and prevents gas from flowing out.

[0067] Furthermore, the present invention also discloses a rectifier composed of multiple sector segments for guiding and adjusting the airflow inside the compressor. The fore-stage casing and the after-stage casing provide mounting and support for the rectifier. The fore-stage casing is one of the casings on which the rectifier is mounted, located at the front end of the compressor, and the after-stage casing is the other casing on which the rectifier is mounted, located at the rear end of the compressor. The rectifier includes an embodiment of the rectifier sector segment sealing member as described above.

[0068] In addition, the present invention also discloses an aircraft engine including the rectifier described above.

[0069] The prior description of this disclosure is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not intended to be limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rectifier sector sealing component, characterized in that, include: First sector segment and second sector segment; The first upper edge plate and the second upper edge plate are located at the edge portions of the first sector segment and the second sector segment, respectively, providing an installation base for the sealing component; A sealing boss is a boss structure added at the edge of the second upper edge plate of the second sector segment; A sealing groove is a groove machined along the side of a sealing boss to accommodate an elastic sealing plate. The sealing plate has one end fixed to the edge of the first upper edge plate of the first sector segment, and the other end inserted into the sealing groove of the second sector segment; Gap, the gap between adjacent rectifier sector edge plates; The connection between the sealing plate and the sealing groove is designed as a C-shaped structure.

2. The rectifier sector sealing member according to claim 1, characterized in that, The sealing sheet is an elastic sealing sheet.

3. The rectifier sector sealing member according to claim 2, characterized in that, The sealing groove is a through groove in the direction of the rectifier centerline.

4. The rectifier sector sealing member according to claim 3, characterized in that, The top of the elastic sealing strip abuts against the top of the sealing groove, forming a sealing element between the first sector segment and the second sector segment, allowing good sealing performance under thermal expansion and airflow pressure.

5. The rectifier sector sealing member according to claim 1, characterized in that, The gap allows the sector to deform under heat and is a leakage channel that the sealing element needs to control.

6. The rectifier sector sealing member according to claim 1, characterized in that, When gas flows out from the gap in the sector section to the outer edge plate, the top of the sealing plate presses against the top of the sealing groove under the pressure of the airflow, and the gas flowing along the inner surface of the sealing plate flows back from the tail of the C-shaped surface to prevent the gas from flowing out of the gap in the sector section.

7. The rectifier sector sealing member according to claim 1, characterized in that, The first and second sector segments are connected by a sealing element to reduce gas leakage in the gap.

8. A rectifier comprising multiple sector segments for guiding and adjusting airflow within a compressor, wherein a pre-stage casing and a post-stage casing provide mounting and support for the rectifier, wherein the pre-stage casing is one of the casings on which the rectifier is mounted, located at the front end of the compressor, and the post-stage casing is the other casing on which the rectifier is mounted, located at the rear end of the compressor, characterized in that, Includes the rectifier sector sealing element as described in any one of claims 1 to 7.

9. An aircraft engine comprising the rectifier as claimed in claim 8.

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