Gas compressor and stator assembly thereof

Abstract

The invention aims to provide a gas compressor and a stator assembly thereof. The stator assembly comprises a casing assembly and a stator blade, the casing assembly comprises a first casing, a second casing and a third casing, the second casing and the first casing are clamped to form a first annular groove and are detachably connected with the first casing, and the third casing is provided with a second annular groove; a first flange and a second flange are arranged on the two sides, in the air inlet direction of the air compressor, of the stationary blade correspondingly. In the assembling state, the second flange is arranged in the second annular groove, the first flange is arranged in the first annular groove, a first matching part is arranged on the first casing and / or the second casing, a second matching part is arranged in the first flange, and when the first flange is arranged in the first annular groove, the first matching part is matched with the second matching part. The first matching part and the second matching part are matched to limit the first flange to be separated from the first ring groove in the axial direction of the gas compressor. By means of the stator assembly, the decomposition efficiency and the decomposition quality of the gas compressor can be improved.

Description

Technical Field

[0001] The present invention relates to the field of gas turbine engines, and in particular to a compressor and a stator assembly thereof. Background Art

[0002] The common structures of the stator casing of an aircraft engine compressor are two types: a two-half split casing and a full-ring casing. Among them, for adjustable stator blades that need to be adjusted in angle, the casing is often a split structure, and for stator blade segments that do not require angle adjustment, the casing is often a full-ring structure. Multi-stage full-ring casings are connected by bolts, and the adjacent two-stage casings together form the installation structure of the stator blade segments.

[0003] like Figure 1 The schematic diagram of the structure of the stator casing of an existing compressor is shown, wherein a front ring groove 910 is provided in a front-stage casing 91, a rear ring groove 920 is provided in a rear-stage casing 92, and a front flange 901 and a rear flange 902 are provided in the stator blade segment 90. The front flange 901 cooperates with the front ring groove 910, and the rear flange 902 cooperates with the rear ring groove 920 to realize the installation of the stator blade segment 90. The assembly sequence of the compressor is usually to assemble the rotor 93 first, and the multi-stage rotor 93 is assembled into a whole, and then the front-stage casing 91, the stator blade segment 90, and the rear-stage casing 92 are installed step by step. Figure 1 Only the assembly structure diagram of the 2nd stage rotor and the 1st stage stator is shown. In fact, the rotor and stator have multiple stages forward and backward, and the form is similar to Figure 1 same.

[0004] However, the inventors found that Figure 1 When the compressor stator casing shown in the figure is disassembled, blade damage or unsuccessful disassembly often occurs, so there is an urgent need to provide a stator assembly with a new configuration to improve the disassembly efficiency and disassembly quality of the compressor. Summary of the invention

[0005] The object of the present invention is to provide a stator assembly capable of improving the decomposition efficiency and decomposition quality of a compressor.

[0006] A stator assembly for achieving the above-mentioned purpose comprises:

[0007] The casing assembly includes:

[0008] First Receiver;

[0009] A second casing, which is clamped with the first casing to form a first annular groove and is detachably connected to the first casing; and

[0010] A third casing having a second ring groove;

[0011] The stationary blade is provided with a first flange and a second flange on both sides along the air inlet direction of the compressor;

[0012] In which, in the assembled state, the second flange is arranged in the second annular groove, the first flange is arranged in the first annular groove, a first matching portion is arranged on the first casing and / or the second casing, and a second matching portion is arranged in the first flange. When the first flange is arranged in the first annular groove, the first matching portion cooperates with the second matching portion to limit the first flange from escaping from the first annular groove along the axial direction of the compressor.

[0013] In one or more embodiments, the first matching portion is a first wedge-shaped convex ring disposed in the first ring groove, and the second matching portion is a second wedge-shaped convex ring disposed corresponding to the first wedge-shaped convex ring.

[0014] In one or more embodiments, in an assembled state, the outer wall surface of the first shell is interference fit with the inner wall surface of the second shell.

[0015] In one or more embodiments, the first matching portion is a first convex ring disposed in the first ring groove, and the second matching portion is a second convex ring disposed corresponding to the first convex ring.

[0016] In one or more embodiments, the first casing comprises:

[0017] A first casing extending in the axial direction of the compressor; and

[0018] A first connecting portion protrudes outward from the first shell;

[0019] The second casing comprises:

[0020] A second casing extending in the axial direction of the compressor; and

[0021] a second connecting portion protruding outward from the second shell;

[0022] The annular groove is formed on the outer side of the first shell and the inner side of the second shell in a clamped manner, and the first connecting portion and the second connecting portion are detachably connected.

[0023] In one or more embodiments, the third casing comprises:

[0024] a third casing extending in the axial direction of the compressor; and

[0025] a third connecting portion protruding outward from the third shell;

[0026] Wherein, the first connecting portion, the second connecting portion and the third connecting portion are respectively detachably connected.

[0027] In one or more embodiments, the first connection portion, the second connection portion, and the third connection portion are connected by fasteners.

[0028] In one or more embodiments, the second flange disposed in the second annular groove can be freely removed from the second annular groove along the axial direction of the compressor.

[0029] On the other hand, according to some embodiments of the present application, a compressor is provided, which includes the stator assembly as described above.

[0030] In one or more embodiments, a multi-stage stator and a multi-stage rotor are included, wherein at least one stage of the stator is the stator assembly.

[0031] The beneficial effects of the present invention are:

[0032] The use of a stator assembly with this configuration can ensure that the stator blades and the third casing are always separated before the stator blades and the first casing, thereby solving the problem of the stator blades following the movement of the third casing and improving the decomposition efficiency and decomposition quality of the compressor.

[0033] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0035] Figure 1 The structural schematic diagram of the existing compressor stator casing is shown;

[0036] Figure 2 A schematic diagram of a stator assembly according to some embodiments of the present application is shown;

[0037] Figures 3 to 5 The schematic diagram of the assembly process of the stator assembly according to some embodiments of the present application is schematically shown;

[0038] Figure 6 A schematic diagram of a stator assembly according to another embodiment of the present application is shown;

[0039] Figure 7 A schematic diagram of a stator assembly according to another embodiment of the present application is shown;

[0040] Figure 8 A schematic diagram of a stator assembly according to yet another embodiment of the present application is shown. DETAILED DESCRIPTION

[0041] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0043] In the case of Figure 1 When the conventional compressor stator casing shown is disassembled, since the compressor rotor and the stator structure are both rotating bodies, it is necessary to first disassemble the rear-stage casing 92 along the axial direction a, then disassemble the stator blade sector 90, and then disassemble the front-stage casing 91, and so on, until the stator casing and the stator blades are disassembled.

[0044] However, the inventors found in practice that, since the stationary blade segment 90 and the casing will be slightly deformed after the engine is operated, when the rear casing 92 is disassembled, the rear flange 902 in the stationary blade segment 90 and the rear annular groove 920 in the rear casing 92 are often not separated, while the front flange 901 in the stationary blade segment 90 and the front annular groove 910 in the front casing 91 are separated, causing the stationary blade segment 90 to follow the rear casing 92 and move along the axial direction a until the stationary blade segment 90 collides with the rotor 93, and the collision will damage the blades. At the same time, at this time, the stationary blade segment 90 is wrapped by the rear casing 92, the rear flange 902 is inaccessible, and it is impossible to apply force to disassemble, which ultimately makes the disassembly impossible.

[0045] After research, the inventor found that by designing a stator assembly with a new configuration, the above-mentioned problems can be solved and the decomposition efficiency and decomposition quality of the compressor can be improved.

[0046] On the one hand, according to some embodiments of the present application, a stator assembly is provided, such as Figure 2A schematic diagram of a stator assembly according to some embodiments of the present application is shown, wherein the stator assembly includes a casing assembly, which includes a first casing 1, a second casing 2 and a third casing 3, wherein the first casing 1, the second casing 2 and the third casing 3 are arranged in sequence along the compressor intake direction x1, that is, as shown in the figure, the first casing 1 is closer to the intake end of the compressor than the third casing 3, and the second casing 2 is arranged between the first casing 1 and the third casing 3.

[0047] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0048] A first annular groove 4 is formed between the first casing 1 and the second casing 2, and the first casing 1 and the second casing 2 are detachably connected. A second annular groove 5 is provided in the third casing 3.

[0049] The stator assembly further comprises a stator blade 6, and a first flange 61 and a second flange 62 are respectively provided on both sides of the stator blade 6 along the compressor intake direction x1.

[0050] like Figure 2 As shown, in the assembled state, the second flange 62 is arranged in the second annular groove 5, the first flange 61 is arranged in the first annular groove 4, and the first matching portion 10 is arranged on the first casing 1 and / or the second casing 2. In the embodiment as shown in the figure, the first matching portion 10 is arranged in the first casing 1, and correspondingly, the second matching portion 610 is arranged in the first flange 61. When the first flange 61 is arranged in the first annular groove 4, the first matching portion 10 cooperates with the second matching portion 610 to limit the first flange 61 from being disengaged from the first annular groove 4 along the axial direction of the compressor.

[0051] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships, for example, the first casing 1 and / or the second casing 2 may represent: existing alone in the first casing 1, existing in both the first casing 1 and the second casing 2, and existing alone in the second casing 2. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0052] It is understandable that the compressor intake direction recorded in the text is the direction along the axial direction of the compressor, from the intake end of the compressor to the rear. The axial direction of the compressor is the direction of the central axis of the compressor.

[0053] like Figures 3 to 5The schematic diagram of the assembly process of the stator assembly according to some embodiments of the present application is shown schematically, wherein during assembly, the stator blade 6 is first assembled with the first casing 1, and the assembly direction of the two can be along Figure 3 The H direction shown in Figure 4 As shown, the second casing 2 is assembled along the axial direction x, and finally as shown Figure 5 As shown, the third casing 3 is assembled along the axial direction x.

[0054] When disassembling the stator assembly having the configuration of the present application, the steps are opposite to the assembly steps. First, the third casing 3 is disassembled along the axial direction x. At this time, if the second flange 62 and the second annular groove 5 cannot be separated smoothly due to deformation, the first matching portion 10 and the second matching portion 610 cooperate to limit the first flange 61 from being disengaged from the first annular groove 4 along the axial direction x of the compressor, forming an axial stop effect. At this time, the second flange 62 can be separated from the second annular groove 5 by applying external force. Subsequently, the second casing is separated along the axial direction x, and finally, the stator blade 6 is separated from the first casing 1 along the H direction. In a specific embodiment, the first matching portion 10 is integrally formed with the first casing 1, and the second matching portion 610 is integrally formed with the first flange 61.

[0055] The use of a stator assembly having the present configuration can ensure that the stator blades 6 and the third casing 3 are always separated before the stator blades 6 and the first casing 1, thereby solving the problem of the stator blades 6 following the movement of the third casing 3 and improving the decomposition efficiency and decomposition quality of the compressor.

[0056] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0057] Please continue to see Figure 2 According to some embodiments of the present application, the first matching portion 10 is a first wedge-shaped convex ring disposed in the first ring groove 4 as shown in the figure. It can be understood that, Figure 2 The structure shown is only a cross-sectional schematic diagram, and the actual first matching portion 10 is a rotating body structure. Correspondingly, the second matching portion 610 is a second wedge-shaped convex ring arranged corresponding to the first wedge-shaped convex ring.

[0058] It is understandable that in Figure 2 In the structure shown, the first matching portion 10 is disposed in the first casing 1. In another embodiment, as shown in FIG. Figure 6As shown, the first matching portion 10 may also be a wedge-shaped protruding ring disposed on the second casing 2. Of course, in some other suitable configurations, the first matching portion 10 may also be disposed in the first casing 1 and the second casing 2 at the same time.

[0059] Furthermore, in some embodiments, Figure 2 As shown, the outer wall surface 1100 of the first shell 11 and the inner wall surface 2100 of the second shell 21 are interference fit to improve assembly accuracy. In a specific embodiment, the interference fit relationship is H7 / p6.

[0060] like Figure 7 A schematic diagram of a stator assembly in another embodiment is shown. Figure 7 As shown, the first matching portion 10 is a first convex ring arranged in the first ring groove 4, and the second matching portion 610 is a second convex ring arranged corresponding to the first convex ring.

[0061] It is understandable that in Figure 7 In the structure shown, the first matching portion 10 is disposed in the first casing 1. In another embodiment, as shown in FIG. Figure 8 As shown, the first matching portion 10 may also be a first convex ring disposed on the second casing 2 .

[0062] Please continue to see Figure 2 According to some embodiments of the present application, the first casing 1 further includes a first shell 11 and a first connection portion 12, wherein the first shell 11 extends along the axial direction x of the compressor, and the first connection portion 12 is provided to protrude radially outward from the first shell 11. The second casing 2 further includes a second shell 21 and a second connection portion 22, wherein the second shell 21 extends along the axial direction x of the compressor, and the second connection portion 22 is provided to protrude radially outward from the second shell 21. The annular groove 4 is formed by clamping on the outer side of the first shell 11 and the inner side of the second shell 21, and the first connection portion 12 is detachably connected to the second connection portion 22 to allow the first casing 1 to be detachably connected to the second casing 2.

[0063] In a specific embodiment, Figure 4 As shown, the outer wall surface 1100 of the first housing 11 and the inner wall surface 2100 of the second housing 21 are respectively high-precision cylindrical surfaces to ensure the assembly accuracy of the first casing 1 and the second casing 2 .

[0064] Further, according to some embodiments of the present application, the third casing 3 further includes a third shell 31 and a third connection portion 32, wherein the third shell 31 extends along the axial direction x of the compressor, and the third connection portion 32 is provided to protrude radially outward from the third shell 31, wherein the first connection portion 12, the second connection portion 22 and the third connection portion 32 are respectively detachably connected. In another embodiment, the second casing 2 and the third casing 3 may also be provided as an integral unit, as long as the second casing 2 and the first casing 1 are detachably connected.

[0065] Further, according to some embodiments of the present application, the first connection part 12, the second connection part 22 and the third connection part 32 are connected by a fastener 7. In this embodiment, when disassembling, the fastener is first screwed to make the third connection part 32 escape from the fastener 7, while the first connection part 12 and the second connection part 22 are still connected by the fastener 7, so that the third casing 3 is first disassembled. Of course, it is also possible to set another fastener between the first connection part 12 and the second connection part 22 to achieve that after the third connection part 32 is separated from the first connection part 12 and the second connection part 22, the first connection part 12 and the second connection part 22 are still connected by the fastener.

[0066] According to some embodiments of the present application, the second flange 62 disposed in the second annular groove 5 can be freely disengaged from the second annular groove 5 along the axial direction x of the compressor, thereby ensuring that the third casing 3 can be easily disassembled first during the disassembly process.

[0067] On the other hand, according to some embodiments of the present application, a compressor is also provided, which includes a stator assembly as described in one or more of the previous embodiments.

[0068] Further, according to some embodiments of the present compressor, the compressor includes a multi-stage stator and a multi-stage rotor, wherein at least one stage of the stator is the stator assembly.

[0069] In the description of the embodiments of the present application, “plurality” means more than two, unless otherwise clearly and specifically defined.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A stator assembly, characterized in that: include: The casing assembly includes: First Receiver; A second casing, which is clamped with the first casing to form a first annular groove and is detachably connected to the first casing; as well as A third casing having a second ring groove; The stationary blade is provided with a first flange and a second flange on both sides along the air inlet direction of the compressor; In which, in the assembled state, the second flange is arranged in the second annular groove, the first flange is arranged in the first annular groove, a first matching portion is arranged on the first casing and / or the second casing, and a second matching portion is arranged in the first flange. When the first flange is arranged in the first annular groove, the first matching portion cooperates with the second matching portion to limit the first flange from escaping from the first annular groove along the axial direction of the compressor.

2. The stator assembly according to claim 1, characterized in that: The first matching portion is a first wedge-shaped convex ring arranged in the first ring groove, and the second matching portion is a second wedge-shaped convex ring arranged corresponding to the first wedge-shaped convex ring.

3. The stator assembly according to claim 2, characterized in that: In an assembled state, the inner wall surface of the first shell is interference fit with the outer wall surface of the second shell.

4. The stator assembly according to claim 1, characterized in that: The first matching portion is a first convex ring arranged in the first ring groove, and the second matching portion is a second convex ring arranged corresponding to the first convex ring.

5. The stator assembly according to claim 1, characterized in that: The first casing comprises: A first casing extending in the axial direction of the compressor; and A first connecting portion protrudes outward from the first shell; The second casing comprises: A second casing extending in the axial direction of the compressor; and a second connecting portion protruding outward from the second shell; The annular groove is formed on the outer side of the first shell and the inner side of the second shell in a clamped manner, and the first connecting portion and the second connecting portion are detachably connected.

6. The stator assembly according to claim 5, characterized in that: The third casing comprises: a third casing extending in the axial direction of the compressor; and A third connecting portion protrudes outward from the third shell; Wherein, the first connecting portion, the second connecting portion and the third connecting portion are respectively detachably connected.

7. The stator assembly according to claim 6, characterized in that: The first connection portion, the second connection portion, and the third connection portion are connected by fasteners.

8. The stator assembly according to claim 1, characterized in that: The second flange disposed in the second annular groove can freely escape from the second annular groove along the axial direction of the compressor.

9. A compressor, characterized in that: The invention comprises a stator assembly according to any one of claims 1 to 8.

10. The compressor according to claim 9, characterized in that It comprises a multi-stage stator and a multi-stage rotor, wherein at least one stage of the stator is the stator assembly.

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