CN113894743B - Method and tool for installing fan outlet guide vane assembly - Google Patents

Abstract

The tool can replace a rubber hammer to strike the guide blade, and is assembled vertically to be assembled horizontally, so that the workload is reduced, wherein rollers are respectively fixed at two ends of a roller shaft, rollers on a roller frame at the left side and a roller frame at the right side are arranged along the shape of a casing of the fan outlet guide blade assembly, so that the casing can be respectively supported in a rolling way, the rollers at the two ends of the roller shaft are respectively provided with roller flanges, and the roller flanges are used for limiting the casing from the outer sides of flange edges of the casing; the compression bar assembly comprises a sliding seat, a compression bar arranged on the sliding seat and a driving device, wherein the position of the sliding seat is adjustably fixed on the middle cross beam, the compression bar is slidably arranged on the sliding seat and is used for being aligned with a guide blade to be installed on the roller frame, the driving device is matched with the compression bar so as to output linear motion to the compression bar, and the compression bar is limited by a limiting piece and is provided with a dead point on the sliding seat along the direction of the guide blade to be installed on the fan.

Description

Method and tool for installing fan outlet guide vane assembly

Technical Field

The invention relates to a method and a tool for mounting an outlet guide vane assembly.

Background

The stationary blades of turbofan engines in the exhaust passage of the fan are called outlet guide blades (OGV blades or simply guide blades or vanes) and their purpose is to improve the flow of the air flow after the fan, the stator assembly consisting of a full ring of OGV blades and a casing housing the full ring of blades being an important component of the aeroengine, the main functions of which are flow guiding and bearing. Fig. 1 and 2 are schematic structural views of an aeroengine fan outlet guide vane assembly, which consists of a plurality of guide vanes 12 and a casing 11, wherein the guide vanes 12 form a whole ring and are fixed on the inner wall of the casing 11 through threaded fasteners 13. In order to improve the bearing performance of the stator assembly, the outer edge plate 121 of the guide vane 12 is inserted on the inner wall of the casing 11 by adopting the slot structure 1210, the inner edge plates 122 of the guide vanes 12 are designed into the inclined platform structure 1220, when the whole ring is formed, the guide vanes 12 are mutually meshed, each guide vane 12 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. The guide vane 12 cannot be assembled independently because the ramps of the inner edge plates 122 of the guide vane 12 engage each other.

One common way of assembly is vertical assembly, i.e. an axially vertical horizontal plane of the casing, is to preassemble the guide blades 12 in a full ring down on the casing 11, and then strike the outer edge plate 121 or the inner edge plate 122 of the guide blades 12 by means of a rubber hammer. The blade structure is easy to damage when knocking the guide vane, in order to reach the matching position of the blade in the knocking process, the assembling progress is slow due to different assembling amounts pushed by knocking each time, an assembler needs to walk around the casing 11 and knock, and the workload is large.

Disclosure of Invention

It is an object of the present invention to provide a mounting tool for a fan outlet guide vane assembly that replaces a rubber hammer striking the guide vane and changes the vertical assembly to a horizontal assembly, reducing the effort.

It is another object of the present invention to provide a method of installing a fan outlet guide vane assembly that utilizes the aforementioned tool to effectively reduce the amount of labor required for vane assembly.

The mounting tool of the fan outlet guide vane assembly comprises a casing and a plurality of outlet guide vanes which are inserted into the casing and can be spliced into a whole ring, wherein a supporting device comprises a middle cross beam, a left roller frame and a right roller frame, the roller frame comprises a plurality of roller shafts, rollers are respectively fixed at two ends of the roller shafts, the rollers on the left roller frame and the right roller frame are arranged along the shape of the casing of the fan outlet guide vane assembly, so that the casing can be respectively supported in a rolling way, the rollers at two ends of the roller shafts are respectively provided with roller flanges, and the roller flanges are used for limiting the casing from the outer sides of flange edges of the casing; the compression bar assembly comprises a sliding seat, a compression bar arranged on the sliding seat and a driving device, wherein the position of the sliding seat is adjustably fixed on the middle cross beam, the compression bar is slidably arranged on the sliding seat and is used for being aligned with a guide blade to be installed on the roller frame, the driving device is matched with the compression bar so as to output linear motion to the compression bar, and the compression bar is limited by a limiting piece and is provided with a dead point on the sliding seat along the direction of press-installing the guide blade to be installed at the outlet of the fan.

In one or more embodiments of the installation tool, the middle cross beam has a sliding groove along a length direction thereof, a plurality of pairs of pin holes are arranged on two sides of the sliding groove, and the sliding seat is slidably arranged in the sliding groove and detachably penetrates through at least one pair of the pin holes and the sliding seat by means of a positioning pin, so that the sliding seat is fixed.

In one or more embodiments of the installation tool, the slide has a vertical extension, and the plunger slidably extends through a top end of the vertical extension and is retained on the vertical extension by a spring.

In one or more embodiments of the installation tool, the vertical extension portion includes two spaced apart vertical arms, the compression bar is disposed on top of the two vertical arms in a penetrating manner, the limiting piece is disposed between the two vertical arms, the compression bar is connected to the limiting piece, the compression bar is blocked by the limiting piece and is kept on the vertical arms, the compression bar is sleeved with a compression spring, and the compression bar is elastically reset through the compression spring.

In one or more embodiments of the installation tool, the support device further comprises a support frame, the support frame comprising the middle beam and a set of gantries positioned to the left and right of the middle beam, the set of gantries comprising a high order gantry and a low order gantry, the low order gantry being adjacent to the middle beam relative to the high order gantry, the beams of the low order gantry providing a horizontal locating surface, the beams of the high order gantry providing a vertical locating surface, the horizontal locating surface and the vertical locating surface being perpendicular to each other thereby defining a vertical locating surface;

the roller frame comprises a left roller frame and a right roller frame, and further comprises a frame body with two vertical edges, wherein the frame body comprises at least three roller shafts, and the vertical edges of the frame bodies of the left roller frame and the right roller frame are respectively positioned and fixed on the vertical positioning surfaces of the left portal frame group and the right portal frame group.

In one or more embodiments of the installation tool, the driving device is a lever, the lever has a resistance arm and a power arm, the hinge position on the sliding seat is taken as a fulcrum, and the end part of the resistance arm corresponds to the pressure lever to push the pressure lever.

A method of installing a fan outlet guide vane assembly for achieving the above object, using any one of the above installation tools, comprising:

the method comprises the steps that firstly, a casing of a fan outlet guide vane assembly is horizontally placed on a roller of a roller frame, the roller is supported in a rolling way, and a roller flange of the roller is used for limiting, so that the casing is kept on the roller frame;

intermittently rotating the casing, and inserting the fan outlet guide blades into the slots in the inner wall of the casing one by one to obtain a preliminary insertion depth which is a part of the axial length of the guide vane;

step three, adjusting the position of the compression bar component on the middle cross beam towards the direction approaching the casing,

step four, intermittently rotating the casing, and pressing the fan outlet guide blades into the mounting groove of the casing by the same stepping amount by driving the pressing rod;

and fifth, if the fan outlet guide blades are not pressed in place, repeating the third step and the fourth step until all the fan outlet guide blades are pressed in place.

According to the tool and the method, the stepping amount of the pressing rod is controlled, the pressing amount of each blade in each circle is consistent, the situation that the blades are pressed too much to be meshed with other blades and incapable of being installed is avoided, the rollers are arranged along the shape of the shape-following casing to roll and support the casing, the casing is enabled to rotate around the axis in a horizontal state, the tool meets the pre-condition of spiral assembly, the method is used for realizing spiral installation of meshed guide blades, the guide blade installation tool is simple in structure and easy to operate, and the process cost is low and the efficiency is high.

Drawings

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

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

FIG. 2 is a schematic view corresponding to a piece of guide vanes in the fan outlet guide vane assembly of FIG. 1.

FIG. 3 is a schematic illustration of an initial state of an installation process of the improved fan outlet guide vane assembly.

FIG. 4 is a schematic illustration of the final state of the installation process of the improved fan outlet guide vane assembly.

FIG. 5 is a schematic view of an installation tool for a fan outlet guide vane assembly.

FIG. 6 is a half cross-sectional view of an installation tool for a fan outlet guide vane assembly.

Fig. 7 is a side view of the plunger assembly.

Fig. 8 is a perspective view of the plunger assembly.

Brief description of the reference numerals:

middle beam 25, left roller frame 21, right roller frame 22, slide seat 31, compression bar 32, and driving device 35

Detailed Description

The following discloses a number of different embodiments or examples of implementing the subject technology. Specific examples of components and arrangements are described below for purposes of simplifying the disclosure, and of course, these are merely examples and are not intended to limit the scope of the invention. For example, a first feature described later in this specification may be formed above or on a second feature, and may include embodiments in which the first and second features are formed in direct contact, as well as embodiments in which additional features may be formed between the first and second features, such that no direct contact may be made between the first and second features. In addition, the disclosure may repeat reference numerals and/or letters in the various examples. 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, where a first element is described as being coupled or combined with a second element, the description includes embodiments in which the first and second elements are directly coupled or combined with each other, and also includes embodiments in which one or more other intervening elements are added to indirectly couple or combine the first and second elements with each other.

Fig. 3 shows a state in which the guide vane 12 is initially loaded into the casing 11. Fig. 4 shows the state in which the guide vane 12 has been completely inserted into the casing 11. The axis of the fan outlet guide vane assembly is horizontal to prevent the fan outlet guide vane assembly from being intermittently rotated during installation on the installation tool 2. From the state shown in fig. 3, the assembly is gradually assembled to the state shown in fig. 4 by means of the compression bar assembly 3. The relevant installation method is described in detail after an exemplary description of the installation tool.

Fig. 5 and 6 show the structure of the installation tool. Fig. 7 and 8 show the construction of the plunger assembly in the installation tool.

As shown in fig. 5 and 6, the installation tool 2 of the fan outlet guide vane assembly comprises a support device and a compression bar assembly 3. The supporting device comprises a middle cross beam 25, a left roller frame 21 and a right roller frame 22, and the two roller frames are preferably symmetrical or have the same structure, so that the left roller frame and the right roller frame can be interchanged, and the device has the advantages of simple structure and low cost. The following description will be made with the two roller frames being the same structure, and the related description is equally applicable to the roller frame 22. The roller frame 21 includes three roller shafts 210, rollers 212 are respectively fixed to both ends of the roller shafts 210, and the rollers 212 at both ends of the roller shafts 210 are respectively provided with roller flanges 2120. Referring to fig. 4, the roller flange 2120 serves to limit the casing 11 from the outside of the flange edge 110 of the casing 11. Since the rollers 212 of the two roller frames 21, 22 are arranged to follow the contour of the casing 11 of the fan outlet guide vane assembly, i.e., the rollers 212 are each capable of rolling support in contact with the contour of the casing 11, the casing can be integrally rolling supported. In addition, the outer sides of the two flange edges 110 of the casing 11 are each restrained by the roller flange 2120 of the roller 212, so that the casing 11 or the fan outlet guide vane assembly can be stably supported on the mounting tool 2. The entire fan outlet guide vane assembly is in a flat configuration with a high center of gravity, preferably three or more roller shafts 210, and a support height approaching one half of the horizontal diameter or height of the casing.

As shown in fig. 7 and 8, the plunger assembly 3 includes a slider 31, a plunger 32 provided on the slider 31, and a driving device 35. With reference to fig. 5 and 6, the slide 31 is adjustably fixed to the middle cross member 25, the pressing bar 32 is slidably disposed on the slide 31 for alignment with the outlet guide vane 12 to be mounted on the roller frame, the driving device 35 is engaged with the pressing bar 32 to output a linear motion to the pressing bar 32, and the pressing bar 32 is limited by the limiting member 34 to have a dead point on the slide 31 in the direction of press-mounting the fan outlet guide vane. In fig. 6, the direction of the press-fit fan outlet guide blades is to the right. Since the dead point exists, the pressing rod 32 can only stop after moving rightwards for a certain distance and can not be pushed continuously, and the advantage is that the pressing amount of each guide vane is fixed, the pressing amount is set according to actual assembly experience, and the problem that the pressing amount is too small or too large due to rubber hammer impact does not exist because the pressing amount of each guide vane is fixed, so that the assembly process can be pushed smoothly.

In the process of assembling the guide vane, in the process of completing one pressing operation of the guide vane through the pressure bar assembly 3, the casing is rotated, and then the pressing operation of the other guide vane is completed, and the assembler does not need excessive movement in the whole process, so that the physical consumption is relieved.

There are various ways of adjusting the slide 31, and the embodiment shown in the figures shows a simple and easy structure. The middle cross member 25 has a slide groove 251 along its length direction, a plurality of pairs of pin holes 252 are provided on both sides of the slide groove 251, and the slide carriage 31 is slidably provided in the slide groove 251 and detachably passes through at least one pair of pin holes 252 and the slide carriage 31 by means of the positioning pin 4, thereby fixing the slide carriage 31. After the one-time pressing operation of the whole-ring guide vane is completed, the positioning pin 4 is loosened, the sliding seat 31 is moved to a direction approaching the casing, after the movement is completed, the positioning pin 4 is inserted into the corresponding pin hole 252 and the hole on the sliding seat 31, and the sliding seat 31 is fixed again. The distance of the pin holes 252 on the sliding groove 251 in the sliding direction of the sliding seat 31 can be correlated with the assembly amount of the pressing rod assembly 3 pressed into the guide vane, so that the press-fit amount of each time can be better controlled. In another embodiment, a slide groove is provided on the slide 31, while a corresponding guide rail is provided on the middle cross member 25. In a further embodiment, the fixation of the slide 31 between the central beams 25 can be achieved by means of a movable snap or key connection or the like.

The slide 31, shown in figures 5 to 8, is of a particular construction, consisting of two parts, including a base 310 and a vertical extension, the base 310 and the vertical extension being connected by a fastener 36, a presser bar 32 slidably passing through the top of the vertical extension and being held on the vertical extension by a spring 33. Since the elastic holding is performed by the spring 33, the pressing lever 32 can be automatically reset each time after being driven by the driving device 35.

The aforementioned vertical extension portion is substantially U-shaped and includes two spaced apart vertical arms 311, 312, the compression bar 32 is disposed at top ends of the two vertical arms 311, 312 in a penetrating manner, a limiting member 34 is disposed between the two vertical arms 311, 312, the compression bar 32 is connected to the limiting member 34, and the compression bar 32 is blocked by the limiting member 34 and cannot be separated from the two vertical arms 311, 312, thereby being held on the two vertical arms 311, 312. The spring 33 is sleeved on the pressing rod 32, and the spring 33 is a compression spring, so that the spring 33 is compressed once the pressing rod 32 moves rightwards, and then the driving device 35 elastically resets once the pressing rod 32 is released. The limiting member 34 may be a threaded member, such as a bolt, which is screwed with the pressing bar 32, and has a dimension larger than the diameter of the hole through which the pressing bar 32 passes of the two vertical arms 311, 312, so that the pressing bar 32 cannot be separated from the two vertical arms or the slide 31, while limiting the maximum formation of the pressing bar 32 on the slide 31, and once the limiting member 34 approaches (in the case of a spring) or contacts (in the case of no spring) the vertical arm 312, the pressing bar 32 reaches its dead point and cannot move.

The support device shown in fig. 5 and 6 is simple in structure and easy to support a high center of gravity and flat assembly. To achieve stable support of the assembly, the centre of support of the left and right roller frames 21, 22 need to coincide and preferably coincide with the centre of gravity of the assembly. The centre of the support of the roller frames 21, 22 is the centre of the support surface defined by the rollers, and as mentioned above, the rollers need to follow the shape of the casing, and the support surface is the surface corresponding to the shape of the casing. The support device further comprises a support frame comprising a base frame 26, the central beam 25 being arranged on the base frame 26 and the gantry sets 23, 24 being located on the left and right side of the central beam 25, the two gantry sets 23, 24 preferably being of symmetrical construction or of identical construction. Taking the gantry set 23 as an example, the lower-order gantry 232 includes a higher-order gantry 231 and a lower-order gantry 232, the lower-order gantry 232 is close to the middle beam 25 relative to the higher-order gantry 231, the beam of the lower-order gantry 232 provides a horizontal positioning surface 2320, and the beam of the higher-order gantry 231 provides a vertical positioning surface 2310, where the horizontal positioning surface 2320 and the vertical positioning surface 2310 are perpendicular to each other, thereby defining a vertical positioning surface. Similarly, the upper stage gantry 241 and the lower stage gantry 242 of the right-hand gantry set 24 also have vertical positioning surfaces.

Correspondingly, the left roller frame 21 and the right roller frame 22 respectively further comprise a frame body with two vertical edges. The vertical edges, exemplified by roller frame 21, include edges 214, 216 that are perpendicular to each other. The vertical edges of the frame bodies of the left and right roller frames 21, 22 are positioned and fixed to the vertical positioning surfaces of the left and right gantry groups 23, 24, respectively. Securing as described herein includes welding, fastening, clamping, or any other manner of achieving a secure connection. The center of the supporting surface defined by the rollers of the roller frame can be rapidly determined through assembling the vertical edges and the vertical positioning surfaces, and the centers of the roller frames on the left side and the right side are overlapped after the roller frames are aligned, so that the structure as shown in the figure is a structure capable of stably rolling and supporting the fan outlet guide vane assembly, and the structure is simple and easy to realize.

The driving means 35 for driving the pressing lever is a lever having a resistance arm 353 and a power arm 352 in the embodiment shown in fig. 7 and 8, and the end 353 of the resistance arm is aligned with the pressing lever 32 with the hinge position on the slider as a fulcrum 351, so that the pressing lever 32 can be pushed with a reduced effort by operating the lever, thereby reducing the physical strength of a worker. The driving means 35 is not limited to a lever, but may be a motor or an electric motor that provides a linear motion output, for example.

As can be appreciated from a combination of fig. 3 and 4, the method of installing a fan outlet guide vane assembly, using the aforementioned installation tool, includes the steps of:

the method comprises the steps that firstly, a casing 11 of a fan outlet guide vane assembly is horizontally placed on a roller of a roller frame, the casing 11 is supported in a rolling way by the roller, and the casing 11 is kept on the roller frame by limiting a roller flange of the roller;

intermittently rotating the casing 11, namely stopping when the guide vane is installed, then rotating to the next station, and installing another guide vane, so that the fan outlet guide vane 12 is inserted into a slot in the inner wall of the casing 11 one by one to be a preliminary insertion depth which is a part of the axial length of the guide vane, and in one embodiment, the preliminary insertion depth is 1/4 of the axial length of the guide vane;

step three, adjusting the position of the compression bar assembly on the middle cross beam in a direction approaching the casing to a position approximately as shown in fig. 3, preferably contacting the right end of the compression bar with the axial end of the outer edge plate 1210 of the guide vane 12;

step four, intermittently rotating the casing, namely stopping when the guide vanes are installed, then rotating to the next station, installing another guide vane, and pressing the fan outlet guide blades 12 into the installation groove of the casing 11 by the same stepping amount by driving the pressing rod 32 one by one;

step five, if the fan outlet guide blades 12 are not pressed into place, repeating steps three and four until all the fan outlet guide blades are pressed into place.

The tool and the method can slide along the axis by utilizing the compression bar assembly, ensure the consistent pressing-in amount of each blade in each circle by controlling the stepping amount of the compression bar, avoid the situation that the installation cannot be carried out due to excessive pressing-in of a certain blade and the engagement of the blade with other blades, arrange the rollers along with the shape of the casing, support the casing in a rolling way, realize the rotation of the casing around the axis in a horizontal state, and meet the precondition of spiral assembly, thereby realizing the spiral installation of the engaged guide blade.

While the invention has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the invention, as will occur to those skilled in the art, without departing from the spirit and scope of the invention. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention fall within the protection scope defined by the claims of the present invention.

Claims (7)

1. A mounting tool for a fan outlet guide vane assembly comprising a casing and a plurality of outlet guide vanes inserted into the casing and capable of being assembled into a full ring, comprising:

the supporting device comprises a middle cross beam, a left roller frame and a right roller frame, wherein the roller frame comprises a plurality of roller shafts, rollers are respectively fixed at two ends of the roller shafts, and the rollers on the left roller frame and the right roller frame are arranged along with the shape of the casing of the fan outlet guide vane assembly, so that the casing can be respectively supported in a rolling way, the rollers at two ends of the roller shafts are respectively provided with roller flanges, and the roller flanges are used for limiting the casing from the outer sides of flange edges of the casing; and

the compression bar assembly comprises a sliding seat, a compression bar arranged on the sliding seat and a driving device, wherein the sliding seat is adjustably fixed on the middle cross beam in position, the compression bar is slidably arranged on the sliding seat and is used for being aligned with a guide blade to be installed on the roller frame, the driving device is matched with the compression bar so as to output linear motion to the compression bar, and the compression bar is limited by a limiting piece and is provided with a dead point along the direction of the fan outlet guide blade pressed on the sliding seat.

2. The mounting tool according to claim 1, wherein the middle cross member has a slide groove along a length direction thereof, a plurality of pairs of pin holes are provided at both sides of the slide groove, and the slide carriage is slidably provided in the slide groove and detachably passes through at least one pair of the pin holes and the slide carriage by means of a positioning pin, thereby fixing the slide carriage.

3. The installation tool of claim 1, wherein the carriage has a vertical extension, and the plunger is slidably disposed through a top end of the vertical extension and retained on the vertical extension by a spring.

4. The installation tool of claim 3, wherein the vertical extension comprises two spaced apart vertical arms, the compression bar is arranged on top of the two vertical arms in a penetrating manner, the limiting piece is arranged between the two vertical arms, the compression bar is connected with the limiting piece, the compression bar is blocked by the limiting piece and is kept on the vertical arms, the compression bar is sleeved with a compression spring, and the compression bar is elastically reset through the compression spring.

5. The installation tool of claim 1, wherein the support device further comprises a support frame comprising the central beam and a set of gantries positioned to the left and right of the central beam, the set of gantries comprising a high order gantry and a low order gantry, the low order gantry being positioned adjacent to the central beam relative to the high order gantry, the beams of the low order gantry providing a horizontal locating surface, the beams of the high order gantry providing a vertical locating surface, the horizontal locating surface and the vertical locating surface being perpendicular to each other thereby defining a vertical locating surface;

the roller frame comprises a left roller frame and a right roller frame, and further comprises a frame body with two vertical edges, wherein the frame body comprises at least three roller shafts, and the vertical edges of the frame bodies of the left roller frame and the right roller frame are respectively positioned and fixed on the vertical positioning surfaces of the left portal frame group and the right portal frame group.

6. The mounting tool according to claim 1, wherein the driving means is a lever having a resistance arm and a power arm, the hinge position on the slider being a fulcrum, and an end of the resistance arm corresponding to the pressing lever to push the pressing lever.

7. A method of installing a fan outlet guide vane assembly using the installation tool of any one of claims 1 to 6, comprising:

the method comprises the steps that firstly, a casing of a fan outlet guide vane assembly is horizontally placed on a roller of a roller frame, the roller is supported in a rolling way, and a roller flange of the roller is used for limiting, so that the casing is kept on the roller frame;

intermittently rotating the casing, and inserting the fan outlet guide blades into the slots in the inner wall of the casing one by one to obtain a preliminary insertion depth which is a part of the axial length of the guide vane;

step three, adjusting the position of the compression bar component on the middle cross beam towards the direction approaching the casing,

step four, intermittently rotating the casing, and pressing the fan outlet guide blades into the mounting groove of the casing by the same stepping amount by driving the pressing rod;

and fifth, if the fan outlet guide blades are not pressed in place, repeating the third step and the fourth step until all the fan outlet guide blades are pressed in place.