CN113894733A

CN113894733A - Integral decomposition method and tool for fan outlet guide vane assembly

Info

Publication number: CN113894733A
Application number: CN202010575183.5A
Authority: CN
Inventors: 胡一廷; 陈寿宇; 李志平; 周宇乾
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2022-01-07
Anticipated expiration: 2040-06-22
Also published as: CN113894733B

Abstract

The invention provides an integral decomposition method and a tool for a guide vane assembly of a fan outlet, wherein the method utilizes an upper clamping ring and a lower clamping ring to clamp a clamping part, wherein an upper joint of an adjacent upper clamping ring segment and a lower joint of an adjacent lower clamping ring segment are close to but staggered with each other, at the close upper joint and lower joint, a fastener is adopted to connect the upper clamping ring segment and the lower clamping ring segment on one side of the upper joint opposite to the lower joint, a fastener is adopted to connect the upper clamping ring segment and the lower clamping ring segment on one side of the lower joint opposite to the upper joint, and a fastener is adopted to connect the upper clamping ring segment and the lower clamping ring segment between the upper joint and the lower joint; arranging a lifting point at a position outside the casing, and lifting the outlet guide vane assembly of the fan; disassembling a fastener between the guide vane and the casing; applying a downward force to the casing to disengage the casing from the guide vane; placing a complete circle of guide vanes on a platform; and loosening the fasteners between the upper clamping ring and the lower clamping ring, and dispersing the whole circle of guide vanes into a plurality of single guide vane parts.

Description

Integral decomposition method and tool for fan outlet guide vane assembly

Technical Field

The invention relates to a disassembling construction method and a disassembling tool for a fan outlet guide vane of a turbofan engine.

Background

The stator assembly shown in fig. 1 and 2, namely the aircraft engine fan outlet guide vane assembly, is an important component of an aircraft engine, and the main functions of the stator assembly are flow guiding and force bearing. The assembly is composed of a plurality of fan outlet guide blades (also referred to as OGVs or guide vanes or guide blades or vanes) 2 and a casing 1, the guide vanes 2 being fixed to the inner wall of the casing 1 by means of threaded fasteners 4 to form a complete ring. In order to improve the bearing performance of the stator assembly, the inner edge plates 22 of the guide vanes 2 are designed into a sloping platform structure, when the whole ring is formed, the guide vanes are mutually meshed, and one meshed position is exemplified by reference numeral 3. Each blade can bear the radial force of the rotor, the bearing performance of the stator assembly is greatly improved, and the service life is also greatly prolonged. For the guide vanes, spiral decomposition is generally adopted, the guide vanes are extracted from a casing one by one in a circle mode, the extraction amount of each circle of each guide vane cannot be too large, so that the guide vane cannot be decomposed due to occlusion, and by adopting the decomposition mode, more attention is paid to the decomposition process, and the decomposition period is longer.

Disclosure of Invention

It is an object of the present invention to provide an integrated disassembly method for a fan outlet guide vane assembly.

Another object of the present invention is to provide an integrated disassembly tool for a fan outlet guide vane assembly, which is simple in structure and easy to operate.

To achieve the object, an integrated disassembly method for a fan outlet guide vane assembly includes:

selecting upper flange edges of the inner edge plates of the guide vanes as clamping parts;

clamping the clamping position by using an upper clamping ring and a lower clamping ring, wherein the upper clamping ring comprises a plurality of upper clamping ring sections, the plurality of upper clamping ring sections are arranged in an annular manner end to end, the lower clamping ring comprises a plurality of lower clamping ring sections, the plurality of lower clamping ring sections are arranged in an annular manner end to end, the upper seam of the adjacent upper clamping ring section and the lower seam of the adjacent lower clamping ring section are close to but staggered with each other, fasteners are adopted at the close upper seam and the lower seam, the upper clamping ring section and the lower clamping ring section are connected by the upper joint, namely, the upper clamping ring section and the lower clamping ring section are connected by the fasteners at one side of the upper joint opposite to the lower seam, the upper clamping ring section and the lower clamping ring section are connected by the fasteners at one side of the lower seam opposite to the upper joint, and the upper clamping ring section and the lower clamping ring section are connected by the fasteners between the upper joint and the lower joint;

arranging a lifting point outside the casing, and lifting the fan outlet guide vane assembly;

disassembling a fastener between the guide vane and the casing;

applying a downward force to the casing to disengage the casing from the guide vane;

placing a complete circle of guide vanes on a platform; and

loosening fasteners between the upper clamp ring and the lower clamp ring and scattering the entire ring of vanes into a plurality of individual vane pieces.

In one embodiment, a plurality of flexible straps are respectively passed through gaps between a plurality of guide vanes to capture different guide vanes, through which the fan outlet guide vane assembly is lifted.

In one embodiment, the upper and lower clamp rings are of equal length construction.

In one embodiment, the upper and lower clamp rings are of the same construction.

In one embodiment, adjacent upper binder ring segments are held with a gap at the upper seam and adjacent lower binder ring segments are held with a gap at the lower seam.

In one embodiment, the downward force applied to the case is applied by uniformly tapping the case.

In order to realize the purpose, the integral type disassembling tool for the guide vane assembly at the outlet of the fan comprises an upper clamping ring and a lower clamping ring, the upper clamping ring comprises a plurality of upper clamping ring sections which are arranged end to end in an annular shape, the lower clamping ring comprises a plurality of lower clamping ring segments which are arranged in an annular shape in an end-to-end adjacent manner, the upper joint of the adjacent upper clamping ring segment is close to the lower joint of the adjacent lower clamping ring segment but staggered with each other, connecting the upper and lower ring segments with fasteners at the adjacent upper and lower joints, i.e., on the side of the overseam opposite the overseam, the upper and lower ring segments are joined using fasteners, a fastener is used to connect the upper and lower ring segments on a side of the lower seam opposite the upper seam, a fastener is used to connect the upper and lower ring segments between the upper and lower seams.

The technical scheme provides a guide vane combined type whole ring decomposition method, parts are prevented from being decomposed one by one, the guide vane decomposition difficulty is reduced, the clamping ring section adopted by the method and the tool is light in weight and is not limited by an operation space, and the installation efficiency of the tool is greatly improved.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a perspective schematic view of a fan outlet guide vane assembly.

FIG. 2 is a half-section partial view of a fan outlet guide vane assembly.

FIG. 3 is a schematic view of an exploded fan outlet guide vane assembly.

FIG. 4 is a half-section partial view of the fan outlet guide vane assembly after installation of the tooling.

FIG. 5 is a flow chart of an exploded fan outlet guide vane assembly.

FIG. 6 is a perspective view of an integrated disassembly tool for a fan outlet guide vane assembly.

Detailed Description

The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

Fig. 6 shows a perspective view of the integrated disassembly tool. Fig. 3 and 4 illustrate a structure for bonding the tooling to the fan outlet guide vane assembly. Fig. 5 shows a flow chart of the overall decomposition method. The integral decomposition tool is first described below. An embodiment of the integrated decomposition method is then described in connection with fig. 1 to 5.

As shown in fig. 6, the integrated disassembling tool for the fan outlet guide vane assembly includes an upper clamping ring and a lower clamping ring, and the upper clamping plate and the lower clamping plate may also be referred to as an upper clamping plate and a lower clamping plate, and may be referred to as a clamping plate or a clamping ring when not distinguished. The upper clamping ring comprises a plurality of upper clamping ring sections 71, the plurality of upper clamping ring sections 71 are arranged in an annular shape in an end-to-end adjacent manner, 6 upper clamping ring sections 71 are shown in fig. 6, and the end-to-end adjacent manner is understood to mean that the head end of one upper clamping ring section in a clockwise or counterclockwise direction is adjacent to the tail end of another upper clamping ring section. Likewise, the lower binder ring includes a plurality of lower binder ring segments 81, the plurality of lower binder ring segments 81 being annularly disposed end-to-end, with 6 segments of the lower binder ring segments 81 being illustrated in FIG. 6. Although the upper and lower binder ring segments are indicated by different reference numerals in the figures, in some embodiments, the lower binder ring segment 81 and the upper binder ring segment 71 are the same part, and in some embodiments, the lower binder ring segment 81 and the upper binder ring segment 71 are equal arc length parts, which may be interchanged.

The upper seam 70 of the adjacent upper binder ring segment 71 is brought into close proximity with, but offset from, the lower seam 80 of the adjacent lower binder ring segment 81, i.e., not in circumferential or axial alignment. Fasteners are used to connect the upper and lower

binder ring segments

71, 81 adjacent the upper and

lower seams

70, 80. Taking the location of the added reference number in FIG. 6 as an example, the upper and lower

binder ring segments

71 and 81 are attached using fasteners 74 on the side of the upper joint 70 opposite the lower joint 80, i.e., on the right side thereof. On the side of the lower joint 80 opposite the upper joint 70, i.e., to the left thereof, a fastener 72 is used to connect the upper and lower

binder ring segments

71, 81, and a fastener 73 is used between the upper and

lower joints

70, 80 to connect the upper and lower

binder ring segments

71, 81. In the following description, it will be understood that the guide vane is clamped by a ring structure formed by an upper layer and a lower layer of multiple sections, the fixed number of fasteners can be greatly reduced, the guide vane can be clamped by the two layers of rings only by fixing the guide vane by the fasteners at the head and the tail, and the operation efficiency is greatly improved. The fastener 73 is a bolt or a combination of a bolt and a nut or other threaded connection, with the nut 75 shown in fig. 6. The joints of the two rings are staggered and misaligned, so that the two rings form an integral ring structure which is not separable (not breakable), and a plurality of discrete guide vanes can be connected into an annular body.

As shown in fig. 1 and fig. 2, in the integrated decomposition method of the fan outlet guide vane assembly, the upper flange 51 of the inner flange 22 of the complete-circle guide vane 2 is selected as a clamping portion, the upper flange 51 is located on the upper side of the inner flange 22, the lower flange 52 is located on the lower side of the inner flange 22, and the inner flange 22 is in a ramp structure, so that the inner diameter of the complete-circle lower flange is larger than that of the complete-circle upper flange.

Referring to fig. 5, in step 1, the inner edge plates 22 of the whole-circle guide vanes 2 are clamped by the upper clamping ring and the lower clamping ring to connect the whole-circle guide vanes 2 into a whole, and during installation, the upper clamping ring or the clamping plate can be first aligned with the installation holes on the inner edge plates 22 and then tiled on the upper sides of the inner edge plates 22, and then the lower clamping ring or the lower clamping plate can be installed. Alternatively, the upper and lower clamping plates or rings may be staggered, as previously described, requiring the lap seams or

seams

70, 80 to be staggered so as not to overlap.

In step 2, as shown in fig. 3, a plurality of hanging strips are uniformly distributed to penetrate through gaps between a plurality of guide vanes 2 to hold different guide vanes, and the hanging strips are preferably flexible hanging strips to protect the guide vanes from being damaged.

In step 3, the engine stator, i.e., the fan outlet guide vane assembly, is lifted by hooking the harness with a crane.

In step 4, the threaded fasteners between the vanes and the casing are removed or separated.

In step 5, uniformly knocking the casing by using a plastic hand hammer in the circumferential direction until the casing is separated from the guide vane, wherein the uniform knocking means that the force F of each knocking is uniform as much as possible, and knocking is performed at different points in the circumferential direction.

In step 6, a complete turn of the guide vanes is placed on the platform with a crane.

In step 7, the fasteners between the two layers of clamping plates or the upper clamping ring and the lower clamping ring are loosened, and the whole circle of guide vanes are scattered into a plurality of single guide vane parts, so that the disassembly work is completed.

The foregoing embodiment has the following effects:

1. the existing method that parts are decomposed one by one is broken through, and a process method for decomposing the guide vane by the whole ring is creatively provided, so that the ramp factor cannot become the limiting condition for the decomposition of the guide vane;

2. the guide vane is clamped by the upper and lower layers of clamping plates, so that the fixing quantity of bolts and nuts can be greatly reduced, each blade needs to be fixed by the bolts and the nuts in a single-ring state, the guide vane can be clamped by the two layers of clamping plates only by fixing the double-layer rings by the bolts and the nuts at the head and the tail, and the operation efficiency is greatly improved;

3. clamping the guide vane at the upper side and the lower side of the flange edge of the inner edge plate of the guide vane by adopting a plurality of sections of clamping ring sections which are connected end to end, staggering and not overlapping seams of two layers of clamping plates to form an integral ring structure which is not divisible (not breakable), and connecting a plurality of discrete guide vanes into an annular body;

4. the large duct is larger than the contour size of an aircraft engine, if all guide vanes are fixed on a whole ring, the diameter of a fixing ring for fixing the guide vanes can reach 1500mm, the diameter is large, the weight is large, the guide vanes can not be operated by a single person, and each guide vane is fixed through bolts and nuts, so that the operation is very inconvenient, time and labor are wasted, a plurality of sections of clamping ring sections are adopted to clamp the guide vanes, the problems that the whole ring structure is large in diameter and weight, and can not be operated by a single person with bare hands are solved, the sector sections are light in weight and easy to operate, and the decomposition efficiency is further improved;

5. the multi-section clamping ring section is convenient to install and is not limited by an operation space, and the problem that the lower-layer clamping ring section of the whole ring structure cannot be installed can be effectively avoided;

6. all guide vanes are connected into a whole in a mode of fixing the circular rings, and the inclined table is not an influence factor in the decomposition process;

7. the hanging of the whole circle of guide vanes is realized by the way that the hanging belt (flexible soft rope) penetrates through the gap between the guide vanes to pocket the guide vanes, and the operation is easy;

8. after the guide vane is integrally decomposed, the fixed ring is detached, so that single parts can be scattered, and the decomposition difficulty of the guide vane is greatly reduced.

Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.

Claims

1. An integrated disassembly method for a fan outlet guide vane assembly comprising a plurality of guide vanes and a casing in which the plurality of guide vanes are inserted in a complete ring, characterized in that it comprises:

disassembling a fastener between the guide vane and the casing;

placing a complete circle of guide vanes on a platform; and

2. The method of claim 1, wherein a plurality of flexible straps are respectively passed through gaps between a plurality of guide vanes to catch different guide vanes, and the fan outlet guide vane assembly is lifted by the flexible straps.

3. The integrated fan outlet guide vane assembly disassembly method of claim 1 wherein the upper and lower clamp rings are of equal length construction.

4. The integrated disassembly method of a fan outlet guide vane assembly of claim 1, wherein the upper and lower clamp rings are of the same construction.

5. The integrated fan outlet guide vane assembly breakdown method of claim 1, wherein adjacent upper binder ring segments maintain a gap at the upper seam and adjacent lower binder ring segments maintain a gap at the lower seam.

6. The method of integrally disassembling a fan outlet guide vane assembly according to claim 1, wherein the downward force applied to the casing is applied by uniformly knocking the casing.

7. An integral type disassembling tool for a guide vane assembly at an outlet of a fan is characterized by comprising an upper clamping ring and a lower clamping ring, the upper clamping ring comprises a plurality of upper clamping ring sections which are arranged end to end in an annular shape, the lower clamping ring comprises a plurality of lower clamping ring segments which are arranged in an annular shape in an end-to-end adjacent manner, the upper joint of the adjacent upper clamping ring segment is close to the lower joint of the adjacent lower clamping ring segment but staggered with each other, connecting the upper and lower ring segments with fasteners at the adjacent upper and lower joints, i.e., on the side of the overseam opposite the overseam, the upper and lower ring segments are joined using fasteners, a fastener is used to connect the upper and lower ring segments on a side of the lower seam opposite the upper seam, a fastener is used to connect the upper and lower ring segments between the upper and lower seams.