Wheel disc structure, interstage sealing structure and aero-engine

Abstract

The wheel disc structure comprises a main body disc and an assembly disc, the main body disc comprises a drum, the assembly disc comprises an annular main body arranged on at least part of the periphery of the drum, comb teeth are arranged on the assembly disc, and the annular main body is detachably connected with the drum. According to the wheel disc structure, the comb teeth are arranged on the annular main body of the assembly disc, the comb teeth can be detached by replacing the assembly disc, time and labor are saved, and the good economical efficiency is achieved. The utility model further provides an interstage sealing structure and an aero-engine.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of aero-engine, specifically relates to the field of wheel disc structure. BACKGROUND

[0002] The component parts of the aero-engine include a stator system and a rotor system, and the rotor system includes disk parts and blades. Since the pressure of the working medium is different in each stage, in order to prevent unnecessary inter-stage gas leakage and thus reduce the engine efficiency or even endanger the normal operation of the engine, inter-stage sealing is required.

[0003] The common wheel disc structure includes a disc core, a drum, a web plate and a tenon slot, and for the wheel disc with inter-stage sealing requirements, a grid tooth is further arranged. In actual engine operation, the grid tooth tip is prone to wear due to collision and friction, and the replacement is relatively complex. SUMMARY

[0004] An object of the utility model is to provide a wheel disc structure which facilitates replacement of the grid tooth.

[0005] To achieve the above object, the wheel disc structure includes a main disc and an assembly disc, the main disc includes a drum, the assembly disc includes an annular main body arranged on at least part of the outer periphery of the drum, and the annular main body is provided with a grid tooth, and the annular main body is detachably connected with the drum.

[0006] In one or more embodiments, the annular main body includes a sunken area which does not contact the outer peripheral surface of the drum.

[0007] In one or more embodiments, the drum includes a shaft shoulder, the shaft shoulder is provided with a mounting groove, and the annular main body is provided with a protrusion which is engaged with the mounting groove.

[0008] In one or more embodiments, the mounting groove is an annular mounting groove, and the protrusion is an annular protrusion.

[0009] In one or more embodiments, the drum includes a shaft shoulder, and the annular main body is detachably connected with the shaft shoulder through a connecting piece.

[0010] In one or more embodiments, the drum includes a radially extending end surface, the assembly disc further includes a bent portion which is attached to the end surface and is arranged at the end of the annular main body.

[0011] In one or more embodiments, the bent portion and the end surface are provided with corresponding connecting holes.

[0012] In one or more embodiments, the annular main body includes a plurality of annular sunken areas.

[0013] The utility model discloses another purpose is to provide a kind of interstage sealing structure, including above-mentioned wheel disc structure, still including sealing ring, the sealing ring is arranged in the outer periphery of grate tooth.

[0014] The utility model discloses still another purpose is to provide an aeroengine, including above-mentioned interstage sealing structure.

[0015] Above-mentioned wheel disc structure by grate tooth is arranged on the annular main body of assembly disc, can be dismantled grate tooth by replacing the mode of assembly disc, save time and effort, and it has preferable economy. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above-mentioned and other features, properties and advantages of the utility model will become more apparent through the following description in conjunction with the drawings and embodiments, wherein:

[0017] Figure 1 It is the section view of traditional wheel disc structure;

[0018] Figure 2 It is the schematic view of traditional wheel disc structure;

[0019] Figure 3 It is the schematic view of sealing ring;

[0020] Figure 4 It is the section view when traditional grate tooth and sealing ring cooperate;

[0021] Figure 5 It is the section view of first embodiment of wheel disc structure;

[0022] Figure 6 It is the enlarged view of A in Figure 5

[0023] Figure 7 It is the connection structure section view of adjacent wheel disc structure;

[0024] Figure 8 It is the section view of second embodiment of wheel disc structure;

[0025] Figure 9 It is the enlarged view of C in Figure 8

[0026] Figure 10 It is the section view of third embodiment of wheel disc structure;

[0027] Figure 11 It is the enlarged view of D in Figure 10

[0028] REFERENCE SIGNS

[0029] 10 wheel disc

[0030] 11 tenon groove ​​​

[0031] 12-spoke plate

[0032] 13. Plate Center

[0033] 14 Drum tubes

[0034] 15. Fingers

[0035] 16, 16' connecting hole

[0036] 17 Connectors

[0037] 18 Fasteners

[0038] 20 Main Panels

[0039] 30 assembly tray

[0040] 31. Ring-shaped main body

[0041] 32 protrusions

[0042] 33. Indentation Zone

[0043] 34. Bend

[0044] 40 Sealing ring

[0045] 140 shaft shoulder

[0046] 141 Mounting Slot

[0047] 145 end face Detailed Implementation

[0048] The present invention will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0049] It should be noted that these and other accompanying drawings are merely examples and are not drawn to scale, and should not be used as a limitation on the scope of protection of this utility model.

[0050] Figures 1 to 4 The conventional disc structure and interstage sealing structure are shown. The disc 10 includes a tenon 11, spokes 12, disc center 13, and drum 14. The grating teeth 15 are located in the drum section and are an important component of the interstage seal.

[0051] Figure 3Another component of the inter-stage seal is shown, i.e. the seal ring 40. The seal ring 40 is a ring-shaped part, which is connected and fixed to the stator part. The seal ring 40 forms an inter-stage seal with the labyrinth 15 on the wheel disc 10, which is used to prevent gas from leaking from one side to the other, as shown. Figure 4 The adjacent wheel discs 10 are fixedly connected through the connecting holes 16 on the end face of the drum 14 and the web 12 and the connecting pieces 17 and the fasteners 18.

[0052] During normal operation of the engine, the seal ring 40 is fixed, and the labyrinth 15 rotates at high speed with the entire rotor system. Ideally, the tip of the labyrinth 15 maintains a certain radial gap with the inner side surface of the seal ring 40. However, in actual engine operation, the tip of the labyrinth 15 often collides and rubs against the inner side surface of the seal ring 40, and after a long period of operation, the labyrinth 15 and the inner side surface of the seal ring 40 will be worn to varying degrees, causing the radial gap between the two to increase, thereby affecting the sealing effect. If the wear is severe, in order to ensure the sealing effect, the corresponding parts need to be replaced.

[0053] However, the replacement of the labyrinth 15 needs to be achieved by replacing the entire wheel disc 15, which is time-consuming and laborious, and the cost of the wheel disc is relatively high.

[0054] Based on this, the present disclosure proposes a wheel disc structure in which the labyrinth is easy to replace, as shown. Figure 5 The wheel disc structure includes a main disc 20 and an assembly disc 30, the main disc 20 includes a drum 14, and the assembly disc 30 includes an annular main body 31 arranged on the outer periphery of at least part of the drum 14, and the annular main body 31 is provided with a labyrinth 15, and the annular main body 31 is detachably connected with the drum 14.

[0055] In an embodiment, as shown, Figure 6 The drum 14 includes a shaft shoulder 140, the shaft shoulder 140 is provided with a mounting groove 141, and the annular main body 31 is provided with a protrusion 32 which is engaged with the mounting groove 141. Further, the mounting groove 141 is an annular mounting groove, and the protrusion 32 is an annular protrusion. The assembly disc 30 is fixed on the main disc 20 through the above-mentioned engagement structure, and when the labyrinth 15 needs to be replaced, the assembly disc 30 is removed from the main disc 20.

[0056] In other embodiments, the annular main body 31 can also be detachably connected with the shaft shoulder 140 through connecting pieces such as bolts.

[0057] To facilitate machining and assembly, the range of the mating surface between the annular body 31 and the drum 14 needs to be reduced. A mating surface refers to a surface in a part that has a mating relationship with other parts and requires certain dimensional accuracy and surface roughness; conversely, a non-mating surface is one where there is no mating relationship. During machining, the requirements for mating surfaces are higher than those for non-mating surfaces. Therefore, in some embodiments, the annular body 31 includes a recessed area 33, which does not contact the outer peripheral surface of the drum 14, such as... Figures 8 to 11 As shown, a non-mating surface E is formed. The portion of the non-recessed area contacts the outer peripheral surface of the drum 14, forming a mating surface B. The annular body 31 may include multiple annular recessed areas, such as... Figure 11 As shown. This design significantly reduces the length of the mating surface along the engine's rotation axis S, making the machining process easier to implement, further reducing machining costs and improving economic efficiency.

[0058] In some embodiments, to accommodate the radially extending end face 145 of the drum 14, the mounting plate 30 further includes a bent portion 34 that fits against the end face 145. The bent portion 34 is disposed at the end of the annular body 31. The bent portion 34 and the end face 145 are provided with corresponding connecting holes 16'. When adjacent discs are connected, a fixed connection is achieved through the connecting holes 16 and 16', the connector 17, and the fastener 18, as shown below. Figure 7 As shown.

[0059] The aforementioned wheel structure, by featuring an assembly plate independent of the main disc drum, allows for direct replacement of the assembly plate when the grates need replacing. This improves the economy of parts replacement due to grate wear, saving time and labor. The recessed area on the annular main body further reduces the machining difficulty of the disc, further enhancing its economic efficiency.

[0060] Based on the above description of the disc structure, we can also understand an interstage sealing structure and an aero-engine that includes this interstage sealing structure, such as... Figure 7 As shown, the interstage sealing structure includes the aforementioned wheel structure and sealing ring 40, and adjacent wheel structures are fixedly connected by connectors 17 and fasteners 18.

[0061] This application uses specific terms to describe embodiments of the application. Terms such as "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0062] The utility model discloses although the above-mentioned preferable embodiment is disclosed, but it is not used to limit the utility model, and any person skilled in the art can make possible change and modification without departing from the spirit and scope of the utility model. Therefore, all the modification, equivalent change and modification of the above-mentioned embodiment according to the technical essence of the utility model without departing from the technical scheme of the utility model all fall into the protection scope defined by the utility model claim.

Claims

1. A wheel disc structure, characterized in that, The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure.

2. The wheel structure of claim 1, wherein The application relates to a wheel disc structure.

3. The wheel structure of claim 1, wherein The application relates to a wheel disc structure.

4. The wheel structure of claim 3, wherein The application relates to a wheel disc structure.

5. The wheel structure of claim 1, wherein The application relates to a wheel disc structure.

6. The wheel structure of claim 1, wherein The application relates to a wheel disc structure.

7. The wheel structure of claim 6, wherein The application relates to a wheel disc structure.

8. The wheel structure of claim 2, wherein The application relates to a wheel disc structure.

9. An interstage seal structure characterized by, The application relates to a wheel disc structure.

10. An aeroengine characterised in that, The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a wheel disc structure. The application relates to a

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