Blade double-layer baffle structure and gas compressor

Abstract

The blade double-layer baffle structure is arranged in an axial side baffle groove of a wheel disc and comprises a plurality of inner-layer baffles and a plurality of outer-layer baffles, and the inner-layer baffles are circumferentially arranged in the axial side baffle groove and comprise at least one inner-layer disassembly plate; the plurality of outer-layer baffle plates are circumferentially arranged in the axial side baffle grooves, are positioned on the axial outer sides of the inner-layer baffle plates, and comprise at least one outer-layer disassembling plate as a destructive disassembling plate, and outer-layer disassembling holes are formed in the outer-layer disassembling plate. The utility model further provides a gas compressor. By means of the structure, damage to the wheel disc and the blades in the baffle disassembling process can be reduced.

Description

TECHNICAL FIELD

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

[0002] In the existing aero-engine compressor design, the connecting mode of the blade and the disc usually adopts the axial tenon joint structure. In order to prevent the axial displacement of the blade, a plurality of baffle plates need to be installed on the front / rear side of the blade. The combination of the baffle plate and the disc is usually very close, and when the baffle plate is disassembled, the surface of the disc and / or the blade is easily damaged. SUMMARY

[0003] An object of the utility model is to provide a blade double-layer baffle plate structure which can reduce the damage to the disc and / or the blade during disassembly.

[0004] A blade double-layer baffle plate structure is provided, which is arranged in an axial side blocking groove of a wheel disc, a radial outer end is limited by a blade rim plate, and comprises: a plurality of inner layer baffle plates which are circumferentially arranged in the axial side blocking groove and comprise at least one inner layer disassembly plate; and a plurality of outer layer baffle plates which are circumferentially arranged in the axial side blocking groove and are located on the axial outer side of the inner layer baffle plates, and comprise at least one outer layer disassembly plate as a destructive disassembly plate, and the outer layer disassembly plate is provided with an outer layer disassembly hole.

[0005] In one or more embodiments, the inner layer disassembly plate is provided with an inner layer disassembly hole.

[0006] In one or more embodiments, the outer layer baffle plate and the inner layer baffle plate are staggered.

[0007] In one or more embodiments, at least one of the outer layer baffle plates shields the inner layer disassembly hole.

[0008] In one or more embodiments, the outer layer disassembly hole is arranged on both sides of the outer layer disassembly plate in the circumferential direction.

[0009] In one or more embodiments, the circumferential side edges of adjacent inner layer baffle plates are attached to each other.

[0010] In one or more embodiments, the circumferential side edges of adjacent outer layer baffle plates are attached to each other.

[0011] Another object of the utility model is to provide a compressor which comprises a plurality of stages of rotors, each stage of rotor comprises a wheel disc and a blade, the blade comprises a rim plate, the wheel disc comprises an axial side blocking groove, and further comprises the above-mentioned blade double-layer baffle plate structure which is arranged in an installation groove defined by the rim plate and the axial side blocking groove.

[0012] The aforementioned blade double-layer baffle structure uses at least one outer layer disassembly plate of the outer baffle as a destructive disassembly plate. During the disassembly process, the destructive disassembly plate is first destructively removed, thereby transferring the point of damage to the disassembly plate during the disassembly process, which can reduce damage to the disk and blade. After disassembly, the outer baffle has a circumferential gap for easy disassembly. After the outer baffle is completely disassembled, the inner baffle has a sufficient axial gap for easy disassembly. Attached Figure Description

[0013] The above and other features, properties and advantages of this utility model will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein:

[0014] Figure 1 This is an overall schematic diagram of the wheel and blades;

[0015] Figure 2 It is a side sectional view of a single-layer baffle;

[0016] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a schematic diagram of the double-layer baffle structure of the blade;

[0018] Figure 5 This is a side sectional view of the double-layer baffle structure;

[0019] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0020] Figure 7 It is a breakdown diagram of the outer baffle, inner baffle, and wheel;

[0021] Figure 8 yes Figure 7 Enlarged view at point C;

[0022] Figure 9 yes Figure 7 Enlarged view at point D. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] Figures 1 to 3 The diagram illustrates the axial tenon joint structure between blade 10 and disk 20 in a conventional aero-engine compressor design. To prevent axial (S-direction) displacement of blade 10, several baffles 30 are installed on the axially front and / or rear sides of blade 10. Blade 10 includes a rim plate 11 and a tenon 12, while disk 20 includes a mortise 21 and an axially side retaining groove 22. The tenon 12 of the blade is inserted into the mortise 21, and the baffles 30 are positioned axially. The rim plate 11 and the axially side retaining groove 22 define a mounting groove 60 for accommodating the baffles 30.

[0026] For an aero-engine, throughout its lifespan, various reasons, such as engine overhauls and blade replacement for test components, necessitate repeated disassembly and assembly of the blades and disk. Current baffle designs, considering sealing and other factors, result in a very tight fit between the baffle and disk. To facilitate disassembly, the baffle 30 includes a circumferential plate 301 and a disassembly plate 302, with disassembly components on the disassembly plate 302 to facilitate the removal of the entire baffle ring. However, due to the tight fit of the baffle 30 in both the circumferential and axial directions, disassembling the baffle 30, blade 10, and disk 20 can easily damage the surfaces of the blades and disk, thus affecting their lifespan.

[0027] To solve this problem, this disclosure proposes a blade double-layer baffle structure, which is disposed in the axial side baffle groove 22 of the wheel disk, and the radial outer end is limited by the blade edge plate 11.

[0028] like Figures 4 to 6 As shown, the blade's double-layer baffle structure includes multiple inner baffles 40 and multiple outer baffles 50. The multiple inner baffles 40 are circumferentially arranged within the axial side groove 22, including at least one inner layer disassembly plate 41 with an inner layer disassembly hole 42. The other inner layer baffle structures do not have inner layer disassembly holes 42, and the circumferential sides of each inner layer baffle 40 are fitted together. That is, the inner layer baffles include two types of structures: inner layer disassembly plates with disassembly holes and baffle structures without disassembly holes. The disassembly hole serves as a disassembly notch, allowing disassembly tools to be inserted to remove the baffle.

[0029] Multiple outer baffles 50 are circumferentially arranged within the axial side retaining groove 22 and located axially outside the inner baffle 40, including at least one outer disassembly plate 51 as a destructive disassembly plate, the outer disassembly plate being provided with outer disassembly holes 52, such as... Figures 5 to 8The rest of the outer layer baffle 50 is not provided with a disassembly hole. The circumferential side edges of each outer layer baffle 50 are attached to each other. That is, the outer layer baffle also includes two types of structures: an outer layer disassembly plate with a disassembly hole and an outer layer baffle structure without a disassembly hole.

[0030] Preferably, the outer layer disassembly hole 52 is provided on both circumferential sides of the outer layer disassembly plate 51 and is a hole structure or a notch structure. In the process of disassembling the outer layer baffle 50, the blade 10 and the disc 20, the outer layer disassembly plate 51 can be destructively disassembled to protect the surface of the blade 10 and the disc 20 from being damaged. Due to the close arrangement of the inner layer baffle 40 and the outer layer baffle 50, the disassembly focus is shifted to the outer layer disassembly plate 51, and the outer layer disassembly plate 51 will be damaged, such as cracking and fragmentation, during disassembly, thereby ensuring the integrity of the blade 10 and the disc 20.

[0031] After the outer layer disassembly plate 51 is disassembled, the outer layer baffle 50 has sufficient circumferential clearance, and then the rest of the outer layer baffle 50 in the circumferential direction is disassembled. After the outer layer baffle 50 is completely disassembled, the inner layer baffle 40 has sufficient axial clearance, and the inner layer baffle 40 can be disassembled one by one without damage by using a disassembly tool in cooperation with the outer layer disassembly hole 52, thereby achieving the purpose of protecting the blade 10 and the disc 20.

[0032] In some embodiments, the outer layer baffle 50 is arranged alternately with the inner layer baffle 40, that is, the outer layer baffle 50 is offset by a certain circumferential position from the inner layer baffle 40 when assembled. Further, the outer layer baffle 50 can also shield the gap that may occur between adjacent inner layer baffles 40 by shielding the inner layer disassembly hole 42. Based on this design, the double-layer baffle structure has better sealing performance.

[0033] When assembled, the blade 10 and the disc 20 are first assembled in place. Then the inner layer baffle 40 and the outer layer baffle 50 are sequentially assembled into the mounting groove 60. After the double-layer baffle is assembled, it can block the axial displacement of the blade 10 relative to the disc. At the same time, when assembling the inner and outer layer baffles, the inner layer baffle 40 and the outer layer baffle 50 need to be assembled with a certain circumferential position offset, and the gap between adjacent inner layer baffles 40 and the inner layer disassembly hole 42 on the disassembly plate is shielded by the outer layer baffle 50.

[0034] When disassembled, the outer layer disassembly hole 52 on the outer layer disassembly plate 51 is used to destructively disassemble the outer layer disassembly plate 51, and then the remaining outer layer baffles 50 are sequentially disassembled. Subsequently, the inner layer baffles 40 are disassembled using the clearance left by the disassembly of the outer layer baffles 50, and the disassembly sequence of the outer layer baffles is the same, that is, the inner layer disassembly plate 41 with the inner layer disassembly hole 42 is disassembled first, and then the remaining inner layer baffles 40 are disassembled one by one.

[0035] After the inner layer baffles are disassembled, the blade 10 and the disc 20 can be easily separated in the axial direction, and the entire disassembly of the blade and the disc is completed.

[0036] The structure has the following advantages:

[0037] (1) When destructively disassembling the outer baffle, there is no need to consider the protection of the blades and the disc as in the single-layer baffle design, and the damage to the blades and / or the disc is transferred by destroying the outer disassembly plate;

[0038] (2) The gap after disassembling the outer baffle provides sufficient space, especially axial space, for the inner baffle to disassemble, so that the above-mentioned double-layer baffle design scheme is easier to disassemble the blades and the disc.

[0039] In combination with the introduction of the above-mentioned double-layer baffle structure of the blade, it can also be understood that a compressor includes multiple stages of rotors, each stage of rotor includes a disc and a blade, the blade includes a rim plate, the disc includes an axial side baffle groove, and the above-mentioned double-layer baffle structure of the blade is arranged in the mounting groove defined by the rim plate and the axial side baffle groove.

[0040] The compressor has the advantage of easy disassembly.

[0041] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, without the opposite indication, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0042] At the same time, specific words are used in the present application to describe the embodiments of the present application. As "one embodiment", "an embodiment" and / or "some embodiments" mean a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "an embodiment" or "one embodiment" or "an alternative embodiment" mentioned in different places in the specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of the present application can be properly combined.

[0043] Although the utility model discloses the above-mentioned preferable embodiment, it is not used to limit the utility model, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent change and modification made to the above-mentioned embodiments according to the technical essence of the utility model without departing from the technical scheme of the utility model, all fall within the protection scope defined by the claims of the utility model.

Claims

1. A double-layered baffle structure of a blade provided in an axial side damper groove of a wheel disc, characterized by, Comprise: a plurality of inner layer baffle plates arranged circumferentially in the axial side blocking groove, comprising at least one inner layer disassembly plate; and a plurality of outer layer baffle plates arranged circumferentially in the axial side blocking groove and located axially outside the inner layer baffle plates, comprising at least one outer layer disassembly plate as a destructive disassembly plate, the outer layer disassembly plate being provided with an outer layer disassembly hole.

2. The vane double baffle structure according to claim 1, wherein The inner layer disassembly plate is provided with an inner layer disassembly hole.

3. The vane double baffle structure according to claim 2, wherein The outer layer baffle plates and the inner layer baffle plates are arranged alternately.

4. The vane double baffle structure according to claim 3, wherein At least one of the outer layer baffle plates shields the inner layer disassembly hole.

5. The vane double baffle structure according to claim 1, wherein The outer layer disassembly hole is arranged on both circumferential sides of the outer layer disassembly plate.

6. The vane double baffle structure according to claim 1, wherein The circumferential side edges of adjacent inner layer baffle plates are in contact with each other.

7. The vane double baffle structure according to claim 1, wherein The circumferential side edges of adjacent outer layer baffle plates are in contact with each other.

8. A compressor comprising a plurality of stages of rotors, characterized in that each stage of rotors comprises a disk and blades, the blades comprising a rim plate, the disk comprising an axial side blocking groove, and further comprising a double-layer baffle plate structure as claimed in any one of claims 1 to 7 arranged in a mounting groove defined by the rim plate and the axial side blocking groove.

Images