A structure of an adjustable compressor casing

Abstract

This application belongs to the technical field of the design of compressor treatment casings in aeroengines or gas turbines, and particularly relates to a structure of an adjustable compressor treatment casing, including: a compressor casing, the outer wall of which has a transmission hole; an annular support plate, connected to the inner side of the compressor casing, having a plurality of treatment holes distributed circumferentially thereon, and forming an annular treatment groove, an annular communication hole, and an annular accommodation cavity with the compressor casing; the annular communication hole communicates with the annular treatment groove and the annular accommodation cavity; an annular partition plate is arranged in the annular communication hole; a transmission shaft, one end of which passes through the transmission hole and extends into the annular accommodation cavity; a transmission arm, arranged in the annular accommodation cavity and connected to the transmission shaft; a transmission rod, arranged in the annular accommodation cavity and hinged between the annular partition plate and the transmission arm; a rocker arm, arranged on the outer side of the compressor casing and connected to the transmission shaft; and an actuator, installed on the outer wall of the compressor casing and hinged to the rocker arm.

Description

Technical Field

[0001] The present application belongs to the technical field of compressor processing casing design in aircraft engines or gas turbines, and specifically relates to an adjustable compressor processing casing structure. Background Art

[0002] The application of compressor casing treatment technology in aircraft engines or gas turbines can effectively improve the aerodynamic stability of the compressor at low speeds, but it will damage the efficiency of the compressor at high speeds, making it difficult to apply in high-performance aircraft engines or gas turbines.

[0003] This application is proposed in view of the above-mentioned technical defects.

[0004] It should be noted that the disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0005] The purpose of the present application is to provide an adjustable compressor casing structure to overcome or alleviate at least one of the known technical deficiencies.

[0006] The technical solution of this application is:

[0007] A compressor adjustable processing casing structure, comprising:

[0008] A compressor casing, the outer wall of which has a transmission hole;

[0009] The annular support plate is connected to the inner side of the compressor casing, and has a plurality of processing holes distributed along the circumferential direction. An annular processing groove, an annular communication hole, and an annular accommodating cavity are formed between the annular support plate and the compressor casing; the annular communication hole is connected to the annular processing groove and the annular accommodating cavity;

[0010] An annular partition plate is arranged in the annular communicating hole;

[0011] A transmission shaft, one end of which passes through the transmission hole and extends into the annular accommodating cavity;

[0012] A transmission arm is arranged in the annular accommodating cavity and connected to the transmission shaft;

[0013] The transmission rod is arranged in the annular accommodation cavity and is hinged between the annular partition plate and the transmission arm;

[0014] The rocker arm is arranged outside the compressor casing and connected to the transmission shaft;

[0015] The actuator is installed on the outer wall of the compressor casing and hinged to the rocker arm, so as to drive the rocker arm to swing, drive the transmission shaft to rotate, and then drive the annular partition to move through the transmission arm and the transmission rod, so that the annular partition can block or open the annular treatment tank.

[0016] According to at least one embodiment of the present application, in the above adjustable compressor treatment casing structure, the annular support plate and the compressor casing are positioned by a spigot and connected by screws.

[0017] According to at least one embodiment of the present application, in the above adjustable compressor treatment casing structure, an annular support groove is formed between the annular support plate and the compressor casing;

[0018] The part of the annular partition located in the annular accommodation cavity has an annular support protrusion;

[0019] When the annular partition blocks the annular treatment tank, the edge part of the annular partition is clamped into the annular support groove, and its annular support protrusion abuts against the side wall of the annular accommodation cavity.

[0020] According to at least one embodiment of the present application, in the above adjustable compressor treatment casing structure, it further includes:

[0021] Two annular bushings, made of resin matrix composite material, are arranged in the annular communication hole and located on both sides of the annular partition.

[0022] According to at least one embodiment of the present application, in the above adjustable compressor treatment casing structure, the compressor casing, the annular support plate, the annular partition and their annular bushings are partially or entirely of a split structure.

[0023] According to at least one embodiment of the present application, in the above adjustable compressor treatment casing structure, both ends of the transmission rod are designed with double-ear structures perpendicular to each other and are hinged to the annular partition and the transmission arm by spherical plain bearings.

[0024] According to at least one embodiment of the present application, in the above adjustable compressor treatment casing structure, the transmission arm has a special-shaped hole sleeved on the transmission shaft and is locked with a nut.

[0025] According to at least one embodiment of the present application, in the above adjustable compressor treatment casing structure, the annular support plate has a positioning groove;

[0026] The positioning groove communicates with the annular accommodation cavity, and its side wall has an outer annular clamping groove;

[0027] One end of the transmission shaft extending into the annular accommodation cavity has an inner annular clamping groove on its outer wall;

[0028] The adjustable compressor treatment casing structure further includes:

[0029] The positioning bearing is arranged in the positioning groove and sleeved on the transmission shaft;

[0030] Two snap rings are respectively clamped in the outer annular clamping groove and the inner annular clamping groove to clamp the positioning bearing.

[0031] According to at least one embodiment of the present application, in the above-mentioned adjustable compressor casing structure, it further includes:

[0032] The casing bushing is made of resin matrix composite material, arranged in the transmission hole and sleeved on the outer periphery of the transmission shaft.

[0033] According to at least one embodiment of the present application, in the above-mentioned adjustable compressor casing structure, the rocker arm and the transmission shaft are connected by spline sleeve teeth;

[0034] The rocker arm and the actuating cylinder are connected by a single and double ear structure with a spherical plain bearing.

[0035] According to at least one embodiment of the present application, in the above-mentioned adjustable compressor casing structure, there are two sets of the transmission shaft and its corresponding structure, which are distributed at 180°.

[0036] According to at least one embodiment of the present application, in the above-mentioned adjustable compressor casing structure, two sets of transmission shafts and their corresponding mechanisms are also provided, but without rocker arms and actuating cylinders, and are distributed alternately with the two sets of transmission shafts and their corresponding structures with rocker arms and actuating cylinders;

[0037] On one transmission shaft without rocker arms and actuating cylinders, a pointer is arranged on the outer side of the compressor casing, locked with a nut, and a scale disk is arranged on the outer side of the compressor casing. Brief Description of the Drawings

[0038] Figure 1 is a schematic diagram of the opening of the annular partition in the adjustable compressor casing provided by the embodiment of the present application;

[0039] Figure 2 is a schematic diagram of the sealing of the annular partition in the adjustable compressor casing provided by the embodiment of the present application;

[0040] Figures 3 - 5 is a partial schematic diagram of the adjustable compressor casing provided by the embodiment of the present application;

[0041] Wherein:

[0042] 1 - Compressor casing; 2 - Annular support plate; 3 - Annular partition; 4 - Transmission shaft; 5 - Transmission arm; 6 - Transmission rod; 7 - Rocker arm; 8 - Actuating cylinder; 9 - Annular bushing; 10 - Positioning bearing; 11 - Two snap rings; 12 - Casing bushing; 13 - Pointer; 14 - Scale disk.

[0043] To better illustrate this embodiment, some components in the drawings are omitted, enlarged or reduced, which do not represent the dimensions of the actual product. In addition, the drawings are only for illustrative purposes and should not be construed as a limitation of this patent. Detailed implementation manners

[0044] To make the technical solutions and their advantages of this application clearer, the technical solutions of this application will be further described clearly and completely below in conjunction with the drawings. It can be understood that the specific embodiments described herein are only partial embodiments of this application, which are only used to explain this application rather than limit this application. It should be noted that for the convenience of description, only the parts related to this application are shown in the drawings, and other related parts can refer to the general design. Without conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0045] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application should be the ordinary meanings understood by those of ordinary skill in the field to which this application belongs. The words indicating directions such as "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", etc. used in the description of this application are only used to represent relative directions or positional relationships, rather than implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the object being described changes, its relative positional relationship may also change accordingly. Therefore, it should not be construed as a limitation of this application. The terms "first", "second", "third" and similar terms used in the description of this application are only for descriptive purposes to distinguish different components, and cannot be understood as indicating or implying relative importance. The similar words such as "a", "an" or "the" used in the description of this application should not be understood as an absolute limitation of the quantity, but should be understood as having at least one. The similar words such as "including" or "comprising" used in the description of this application are intended to mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects.

[0046] In addition, it should be noted that unless otherwise clearly specified and limited, the similar words such as "installed", "connected" and "coupled" used in the description of this application should be understood in a broad sense. For example, the 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 directly connected or indirectly connected through an intermediate medium, and can also be the communication inside two elements. Those skilled in the art can understand their specific meanings in this application according to the specific situation.

[0047] The following will further describe this application in conjunction with the attached Figures 1 to 5 drawings in further detail.

[0048] A compressor adjustable treatment casing structure includes:

[0049] A compressor casing 1, whose outer wall has a transmission hole;

[0050] An annular support plate 2, connected to the inner side of the compressor casing 1, having a plurality of treatment holes distributed circumferentially thereon, forming an annular treatment groove, an annular communication hole, and an annular accommodation cavity with the compressor casing 1; the annular communication hole communicates the annular treatment groove and the annular accommodation cavity;

[0051] An annular partition 3, arranged in the annular communication hole;

[0052] A transmission shaft 4, one end of which passes through the transmission hole and extends into the annular accommodation cavity;

[0053] A transmission arm 5, arranged in the annular accommodation cavity and connected to the transmission shaft 4;

[0054] A transmission rod 6, arranged in the annular accommodation cavity and hinged between the annular partition 3 and the transmission arm 5;

[0055] A rocker arm 7, arranged on the outer side of the compressor casing 1 and connected to the transmission shaft 4;

[0056] An actuating cylinder 8, installed on the outer wall of the compressor casing 1 and hinged to the rocker arm 7, so as to be able to drive the rocker arm 7 to swing, drive the transmission shaft 4 to rotate, and further drive the annular partition 3 to move through the transmission arm 5 and the transmission rod 6, so that the annular partition 3 can block or open the annular treatment groove, specifically, it can open the annular treatment groove at low speed, as Figure 1 shown, to improve the aerodynamic stability of the compressor, and block the annular treatment groove at high speed, as Figure 2 shown, to ensure the efficiency of the compressor.

[0057] For the compressor adjustable treatment casing structure disclosed in the above embodiments, those skilled in the art can understand that its design utilizes the annular partition 3 to block and open the annular treatment groove at low speed and high speed respectively, so as to take into account the aerodynamic stability of the compressor at low speed and the efficiency at high speed, so that the treatment casing technology can be well applied to high-performance aeroengines or gas turbines. In addition, the structures adapted to the setting of the annular partition 3, including the annular treatment groove, the annular communication hole, and the annular accommodation cavity, are formed by the cooperation of the annular support plate 2 arranged on the inner side and the compressor casing 1, which is convenient for assembly and fitting.

[0058] In some alternative embodiments, in the above compressor adjustable treatment casing structure, the annular support plate 2 and the compressor casing 1 are positioned by a rabbet and connected by screws.

[0059] In some alternative embodiments, in the above-described adjustable compressor casing structure, an annular support groove is formed between the annular support plate 2 and the compressor casing 1;

[0060] The annular partition 3 has an annular support protrusion at the position of the annular accommodation cavity;

[0061] When the annular partition 3 seals the annular processing groove, the edge portion of the annular partition 3 is snapped into the annular support groove, and its annular support protrusion abuts against the side wall of the annular accommodation cavity, so as to effectively support the annular partition 3, prevent the annular partition 3 from vibrating, affect the aerodynamic stability of the compressor, and position the annular partition 3 when it is closed.

[0062] In some alternative embodiments, in the above-described adjustable compressor casing structure, it further includes:

[0063] Two annular bushings 9, made of resin-based composite materials, are arranged in the annular communication holes, on both sides of the annular partition 3, to ensure the airtightness at this place and provide a lubricating function for the movement of the annular partition 2.

[0064] In some alternative embodiments, in the above-described adjustable compressor casing structure, the compressor casing 1, the annular support plate 2, the annular partition 3 and its annular bushings 9 are partially or entirely of a split structure in two halves, for easy assembly.

[0065] In some alternative embodiments, in the above-described adjustable compressor casing structure, both ends of the transmission rod 6 are designed with double-ear structures perpendicular to each other, as Figure 3 shown, and are hinged to the annular partition 3 and the transmission arm 5 by spherical plain bearings, so as to have large rotational freedom in the axial and radial directions.

[0066] In some alternative embodiments, in the above-described adjustable compressor casing structure, the transmission arm 5 has a special-shaped hole sleeved on the transmission shaft 4 and is locked with a nut.

[0067] In some alternative embodiments, in the above-described adjustable compressor casing structure, the annular support plate 2 has a positioning groove;

[0068] The positioning groove communicates with the annular accommodation cavity, and its side wall has an outer annular clamping groove;

[0069] One end of the transmission shaft 4 extending into the annular accommodation cavity has an inner annular clamping groove on its outer wall;

[0070] The adjustable compressor casing structure further includes:

[0071] Positioning bearings 10, there can be two, arranged in the positioning groove, sleeved on the transmission shaft 4, to provide support for the transmission shaft 4 and ensure the stability of the rotation of the transmission shaft 4;

[0072] Two snap rings 11 are respectively clamped in the outer annular slot and the inner annular slot to clamp the positioning bearing 10, as Figure 4 shown.

[0073] In some alternative embodiments, in the above-mentioned adjustable compressor casing structure, it further includes:

[0074] A casing bushing 12, made of resin matrix composite material, is arranged in the transmission hole and sleeved on the outer periphery of the transmission shaft 4 to ensure the seal at this place and provide a lubrication function for the rotation of the transmission shaft 4.

[0075] In some alternative embodiments, in the above-mentioned adjustable compressor casing structure, the rocker arm 7 and the transmission shaft 4 are connected by spline sleeve teeth;

[0076] The rocker arm 7 and the actuator 8 are connected by a single and double ear structure with a spherical plain bearing.

[0077] In some alternative embodiments, in the above-mentioned adjustable compressor casing structure, there are two sets of the transmission shaft 4 and its corresponding structure, which are distributed at 180° to ensure the smoothness of driving the annular partition 3.

[0078] In some alternative embodiments, in the above-mentioned adjustable compressor casing structure, two sets of the transmission shaft 4 and its corresponding mechanism are also provided, but without the rocker arm 7 and the actuator 8, and are distributed alternately with the two sets of the transmission shaft 4 and its corresponding structure with the rocker arm 7 and the actuator 8, which can increase the smoothness of the movement of the annular partition 3;

[0079] On a transmission shaft 4 without the rocker arm 7 and the actuator 8, a pointer 13 is arranged on the outside of the compressor casing 1 and locked with a nut, and a scale disk 14 is arranged on the outside of the compressor casing 1, as Figure 5 shown, to be able to indicate the rotation angle of the transmission shaft 4. Thus, the movement position of the annular partition 3 can be obtained.

[0080] The various embodiments in the specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0081] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings. Those skilled in the art should understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. An adjustable compressor casing structure, characterized in that, Comprising: A compressor casing (1) whose outer wall has a transmission hole; An annular support plate (2) connected to the inner side of the compressor casing (1), having a plurality of treatment holes distributed circumferentially thereon, and forming an annular treatment groove, an annular communication hole, and an annular accommodation cavity with the compressor casing (1); the annular communication hole communicates the annular treatment groove and the annular accommodation cavity; An annular partition plate (3) disposed in the annular communication hole; A transmission shaft (4) with one end passing through the transmission hole and extending into the annular accommodation cavity; A transmission arm (5) disposed in the annular accommodation cavity and connected to the transmission shaft (4); A transmission rod (6) disposed in the annular accommodation cavity and hinged between the annular partition plate (3) and the transmission arm (5); A rocker arm (7) disposed outside the compressor casing (1) and connected to the transmission shaft (4); An actuating cylinder (8) installed on the outer wall of the compressor casing (1) and hinged to the rocker arm (7), whereby it can drive the rocker arm (7) to swing, drive the transmission shaft (4) to rotate, and further drive the annular partition plate (3) to move through the transmission arm (5) and the transmission rod (6), enabling the annular partition plate (3) to block or open the annular treatment groove.

2. The adjustable compressor treatment casing structure according to claim 1, wherein: The annular support plate (2) is positioned with respect to the compressor casing (1) by a rabbet and connected by screws.

3. The adjustable compressor treatment casing structure according to claim 1, wherein: An annular support groove is formed between the annular support plate (2) and the compressor casing (1); The part of the annular partition plate (3) located in the annular accommodation cavity has an annular support protrusion; When the annular partition plate (3) blocks the annular treatment groove, the edge part of the annular partition plate (3) is snapped into the annular support groove, and its annular support protrusion abuts against the side wall of the annular accommodation cavity.

4. The adjustable compressor treatment casing structure according to claim 1, wherein: It further comprises: Two annular bushings (9) made of resin matrix composite material, disposed in the annular communication hole and located on both sides of the annular partition plate (3).

5. The adjustable compressor treatment casing structure according to claim 4, wherein: Part or all of the compressor casing (1), the annular support plate (2), the annular partition plate (3), and its annular bushings (9) are of a split structure in two halves.

6. The adjustable compressor treatment casing structure according to claim 1, wherein: Both ends of the transmission rod (6) are designed with double-ear structures perpendicular to each other and are hinged to the annular partition plate (3) and the transmission arm (5) by spherical plain bearings.

7. The adjustable compressor treatment casing structure according to claim 1, wherein: The transmission arm (5) has a special-shaped hole sleeved on the transmission shaft (4) and is locked with a nut.

8. The adjustable compressor treatment casing structure according to claim 1, wherein: The annular support plate (2) has a positioning groove; The positioning groove communicates with the annular accommodation cavity, and its side wall has an outer annular clamping groove; One end of the transmission shaft (4) extending into the annular accommodation cavity has an inner annular clamping groove on its outer wall; The adjustable compressor casing structure further includes: A positioning bearing (10) is arranged in the positioning groove and sleeved on the transmission shaft (4); Two snap rings (11) are respectively clamped in the outer annular clamping groove and the inner annular clamping groove to clamp the positioning bearing (10).

9. The adjustable compressor casing structure according to claim 1, characterized in that It further includes: A casing bushing (12) is made of a resin matrix composite material, arranged in the transmission hole and sleeved on the outer periphery of the transmission shaft (4).

10. The adjustable compressor casing structure according to claim 1, characterized in that The rocker arm (7) is connected to the transmission shaft (4) by spline sleeve tooth fit; The rocker arm (7) is connected to the actuator (8) through a single and double ear structure with a spherical plain bearing.

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