Compressor and stator assembly thereof

Abstract

The application aims to provide a compressor and a stator assembly thereof. The stator assembly comprises a casing assembly and a vane, the casing assembly comprises a first casing, a second casing and a third casing, the second casing is clamped with the first casing to form a first annular groove, and is detachably connected with the first casing, the third casing has a second annular groove, and the vane is provided with a first flange and a second flange on two sides along the air inlet direction of the compressor. 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 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 and the second matching part are matched to limit the first flange from being taken out of the first annular groove along the axial direction of the compressor. Through the stator assembly, the disassembly efficiency and quality of the compressor can be improved.

Description

TECHNICAL FIELD

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

[0002] The common structure of the compressor stator case of the aero-engine is two half split cases and whole ring cases; among them, the case is usually split structure corresponding to the adjustable stator blades which need to be adjusted in angle, and the case is usually whole ring structure corresponding to the stator segment which does not need to be adjusted in angle. The multi-stage whole ring case is connected by bolts, and the adjacent two stages of the case form the installation structure of the stator segment together.

[0003] For example, Figure 1 The structure diagram of the existing compressor stator case is shown, wherein the front ring groove 910 is arranged in the front stage case 91, the rear ring groove 920 is arranged in the rear stage case 92, the front flange 901 and the rear flange 902 are arranged in the stator segment 90, the front flange 901 is matched with the front ring groove 910, and the rear flange 902 is matched with the rear ring groove 920 to realize the installation of the stator segment 90, and the assembly sequence of the compressor is usually to assemble the rotor 93 first, assemble the multi-stage rotor 93 into a whole, and then install the front stage case 91, the stator segment 90 and the rear stage case 92 step by step. Figure 1 Only the assembly structure diagram of the 2-stage rotor and the 1-stage stator is shown, and there are multiple stages of the rotor and the stator forward and backward, which are the same as Figure 1 .

[0004] However, the inventor finds that when the compressor stator case shown in the Figure 1 is disassembled, the problem of blade damage or disassembly difficulty often occurs, so it is urgent to provide a stator assembly with a new structure to improve the disassembly efficiency and quality of the compressor. SUMMARY

[0005] The purpose of the present application is to provide a stator assembly which can improve the disassembly efficiency and quality of the compressor.

[0006] The stator assembly for achieving the above purpose comprises:

[0007] The case assembly comprises, which are arranged in sequence along the air inlet direction of the compressor:

[0008] The first case;

[0009] The second case, which is arranged with the first case to form a first ring groove and is detachably connected with the first case; and

[0010] The third case, which has a second ring groove;

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

[0012] In the assembled state, the second flange is arranged in the second ring groove, the first flange is arranged in the first ring 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 the first matching part and the second matching part are matched to limit the first flange from being pulled out of the first ring groove along the axial direction of the compressor when the first flange is arranged in the first ring groove.

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

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

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

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

[0017] a first shell extending along the axial direction of the compressor; and

[0018] a first connecting part protruding outward from the first shell;

[0019] The second casing comprises:

[0020] a second shell extending along the axial direction of the compressor; and

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

[0022] The ring groove is formed between the outer side of the first shell and the inner side of the second shell, and the first connecting part and the second connecting part are detachably connected.

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

[0024] a third shell extending along the axial direction of the compressor; and

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

[0026] The first connecting part, the second connecting part, and the third connecting part are detachably connected, respectively.

[0027] In one or more embodiments, the first connecting portion, the second connecting portion, and the third connecting portion are connected by a fastener.

[0028] In one or more embodiments, the second flange disposed in the second ring groove is free to disengage from the second ring groove along an axial direction of the compressor.

[0029] In another aspect, the present application also provides a compressor comprising the stator assembly as described above.

[0030] In one or more embodiments, the compressor comprises a plurality of stages of stators and a plurality of stages of rotors, wherein at least one stage of the stators is the stator assembly.

[0031] The present application has the following advantages:

[0032] With the stator assembly having the above structure, the stator vanes are always separated from the third casing before being separated from the first casing, thereby solving the problem of the stator vanes following the movement of the third casing and improving the disassembly efficiency and quality of the compressor.

[0033] The above description is merely a summary of the technical solutions of the present application. In order to enable one of ordinary skill in the art to better understand the technical means of the present application and implement the same according to the contents of the specification, and in order to enable the above and other purposes, features and advantages of the present application to be more apparent, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as limiting of the present application. Moreover, in the drawings, like reference numerals denote similar parts throughout the several views. In the drawings:

[0035] Figure 1 A structural schematic diagram of a conventional 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 An assembly process schematic diagram of a stator assembly according to some embodiments of the present application is shown schematically;

[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 yet another embodiment of the present application is shown;

[0040] Figure 8 Fig. 1 shows a schematic view of a stator assembly according to an embodiment of the present application. DETAILED DESCRIPTION

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

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0043] In the prior art, as shown in Fig. 1, the stator assembly of the compressor is disassembled. Figure 1 When the existing compressor stator casing is disassembled, since the compressor rotor and stator structure are both rotary bodies, the rear casing 92 is first disassembled along the axial direction a, then the stator vane sector 90 is disassembled, and then the front casing 91 is disassembled, and so on, so that the stator casing and the stator vane are disassembled.

[0044] However, the inventors have found in practice that, after the engine is operated, the stator vane sector 90 and the casing will be slightly deformed, and when the rear casing 92 is disassembled, the rear flange 902 of the stator vane sector 90 and the rear ring groove 920 of the rear casing 92 are often not separated, while the front flange 901 of the stator vane sector 90 and the front ring groove 910 of the front casing 91 are separated, which causes the stator vane sector 90 to move along the axial direction a with the rear casing 92 until the stator vane sector 90 collides with the rotor 93, which will damage the blades. At the same time, at this time, the stator vane sector 90 is wrapped by the rear casing 92, the rear flange 902 is inaccessible, and cannot be disassembled by force, which ultimately leads to the disassembly being unable to proceed.

[0045] The inventors have found that by designing a stator assembly with a new configuration, the above problems can be solved, and the disassembly efficiency and quality of the compressor can be improved.

[0046] In one aspect, according to some embodiments of the present application, a stator assembly is provided, as shown in Fig. 1. Figure 2A schematic diagram of a stator assembly according to some embodiments of the present application is shown. The stator assembly includes a housing assembly, which includes a first housing 1, a second housing 2, and a third housing 3. The first housing 1, the second housing 2, and the third housing 3 are arranged sequentially along the compressor inlet direction x1. As shown in the figure, the first housing 1 is closer to the compressor inlet end than the third housing 3, and the second housing 2 is disposed between the first housing 1 and the third housing 3.

[0047] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed 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 housing 1 and the second housing 2, and the first housing 1 and the second housing 2 are detachably connected. A second annular groove 5 is provided in the third housing 3.

[0049] The stator assembly also includes a stator vane 6, which has a first flange 61 and a second flange 62 respectively on both sides along the compressor intake direction x1.

[0050] like Figure 2 As shown, in the assembled state, the second flange 62 is disposed in the second annular groove 5, and the first flange 61 is disposed in the first annular groove 4. A first mating part 10 is disposed on the first housing 1 and / or the second housing 2. In the embodiment shown in the figure, the first mating part 10 is disposed in the first housing 1. Correspondingly, a second mating part 610 is disposed in the first flange 61. When the first flange 61 is disposed in the first annular groove 4, the first mating part 10 and the second mating part 610 cooperate to restrict the first flange 61 from disengaging from the first annular groove 4 along the axial direction of the compressor.

[0051] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, "first casing 1 and / or second casing 2" can represent three cases: existing alone in first casing 1, existing simultaneously in first casing 1 and second casing 2, or existing alone in second casing 2. Additionally, the character " / " in this document generally indicates that the preceding and following associated objects have an "or" relationship.

[0052] It is understandable that the compressor intake direction described in the text is the axial direction of the compressor, from the intake end of the compressor towards the rear. The compressor's axial direction is the direction of its central axis.

[0053] like Figures 3 to 5The assembling process of the stator assembly according to some embodiments of the present application is schematically shown in the following figures. When assembling, first, the stator vane 6 is assembled with the first casing 1, both of which are assembled along the H direction as shown in Figure 3 , then the second casing 2 is assembled along the axial direction x as shown in Figure 4 , and finally the third casing 3 is assembled along the axial direction x as shown in Figure 5 .

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

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

[0056] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combinable with other embodiments.

[0057] Please continue to refer to Figure 2 , according to some embodiments of the present application, the first fitting part 10 is a first wedge-shaped convex ring arranged in the first ring groove 4 as shown in the figure. It can be understood that Figure 2 the structure shown in the figure is only a cross-sectional schematic diagram, and the actual first fitting part 10 is a solid of revolution structure. Correspondingly, the second fitting part 610 is a second wedge-shaped convex ring arranged corresponding to the first wedge-shaped convex ring.

[0058] It can be understood that in the structure shown in Figure 2 , the first fitting part 10 is arranged in the first casing 1, and in another embodiment, as shown in Figure 6As shown, the first mating part 10 can also be a wedge-shaped protrusion ring disposed on the second housing 2. Of course, in some other suitable configurations, the first mating part 10 can also be disposed in both the first housing 1 and the second housing 2.

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

[0060] like Figure 7 A schematic diagram of the stator assembly in another embodiment is shown, such as... Figure 7 As shown, the first mating part 10 is a first convex ring disposed in the first annular groove 4, and the second mating part 610 is a second convex ring disposed corresponding to the first convex ring.

[0061] Understandably, in Figure 7 In the structure shown, the first mating part 10 is disposed in the first housing 1. In another embodiment, such as... Figure 8 As shown, the first mating part 10 can also be a first protruding ring provided on the second housing 2.

[0062] Please continue reading Figure 2 According to some embodiments of this application, the first casing 1 further includes a first housing 11 and a first connecting portion 12, wherein the first housing 11 extends along the axial direction x of the compressor, and the first connecting portion 12 protrudes radially outward from the first housing 11. The second casing 2 further includes a second housing 21 and a second connecting portion 22, wherein the second housing 21 extends along the axial direction x of the compressor, and the second connecting portion 22 protrudes radially outward from the second housing 21. An annular groove 4 is formed clampingly on the outer side of the first housing 11 and the inner side of the second housing 21, and the first connecting portion 12 and the second connecting portion 22 are detachably connected to allow for a detachable connection between the first casing 1 and the second casing 2.

[0063] In a specific embodiment, such as 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 high-precision cylindrical surfaces to ensure the assembly accuracy of the first housing 1 and the second housing 2.

[0064] Further, according to some embodiments of the present application, the third casing 3 further comprises a third shell 31 and a third connecting portion 32, wherein the third shell 31 extends along the axial direction x of the compressor, and the third connecting portion 32 is protruded radially outward from the third shell 31, and wherein the first connecting portion 12, the second connecting portion 22 and the third connecting portion 32 are detachably connected. In another embodiment, the second casing 2 and the third casing 3 can also be integrally arranged, as long as the second casing 2 and the first casing 1 can be detachably connected.

[0065] Further, according to some embodiments of the present application, the first connecting portion 12, the second connecting portion 22 and the third connecting portion 32 are connected by the fastener 7, and in this embodiment, when disassembling, the fastener is first screwed so that the third connecting portion 32 is detached from the fastener 7, and the first connecting portion 12 and the second connecting portion 22 still remain connected by the fastener 7, so that the third casing 3 is first disassembled. Of course, the first connecting portion 12 and the second connecting portion 22 can still remain connected by the fastener after the third connecting portion 32 is separated from the first connecting portion 12 and the second connecting portion 22 by additionally arranging the fastener between the first connecting portion 12 and the second connecting portion 22.

[0066] According to some embodiments of the present application, the second flange 62 arranged in the second annular groove 5 can be freely detached from the second annular groove 5 along the axial direction x of the compressor, so as to ensure 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 comprises the stator assembly as described in one or more of the preceding embodiments.

[0068] Further, according to some embodiments of the present compressor, the compressor comprises a plurality of stages of stators and a plurality of stages of rotors, wherein at least one stage of stators is the stator assembly.

[0069] In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A stator assembly, characterized by, The stator assembly comprises: a casing assembly comprising, in sequence along the direction of air inlet of the compressor: a first casing; a second casing, which is clamped with the first casing to form a first annular groove and is detachably connected with the first casing; and a third casing having a second annular groove; a vane, which is provided with a first flange and a second flange on both sides along the direction of air inlet of the compressor; wherein, 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 part is arranged on the first casing and / or the second casing, and a second matching part is arranged in the first flange, the first matching part and the second matching part cooperate to limit the first flange from being pulled out of the first annular groove along the axial direction of the compressor when the first flange is arranged in the first annular groove; the first casing comprises: a first shell extending along the axial direction of the compressor; and a first connecting part protruding outward from the first shell; the second casing comprises: a second shell extending along the axial direction of the compressor; and a second connecting part protruding outward from the second shell; wherein, the first annular groove is clamped between the outer side of the first shell and the inner side of the second shell, and the first connecting part and the second connecting part are detachably connected; the third casing comprises: a third shell extending along the axial direction of the compressor; and a third connecting part protruding outward from the third shell; wherein, the first connecting part, the second connecting part and the third connecting part are detachably connected; the first matching part is a first wedge-shaped convex ring arranged in the first annular groove, and the second matching part is a second wedge-shaped convex ring arranged correspondingly to the first wedge-shaped convex ring; in the assembled state, the inner wall surface of the first shell and the outer wall surface of the second shell are in interference fit. the first matching part is a first convex ring arranged in the first annular groove, and the second matching part is a second convex ring arranged correspondingly to the first convex ring.

2. The stator assembly of claim 1, wherein the first connecting part, the second connecting part and the third connecting part are connected by fasteners.

3. The stator assembly of claim 1, wherein the second flange arranged in the second annular groove can be freely pulled out of the second annular groove along the axial direction of the compressor.

4. The stator assembly of claim 1, wherein The stator assembly comprises:

5. A compressor characterized by, a stator assembly as claimed in any one of claims 1 to 4.

6. The compressor of claim 5, wherein The stator assembly comprises: a stator assembly as claimed in any one of claims 1 to 4.

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