Maintenance tool for air-entraining precooler

Abstract

The utility model belongs to the technical field of maintenance tools, and particularly relates to an air entraining precooler overhaul tool which comprises a frame and a positioning plate adjustably connected to the frame. The positioning plate is provided with a first pressing assembly used for fixing a hot edge inlet air duct, a second pressing assembly used for fixing a hot edge outlet air duct, a third pressing assembly used for fixing a hot edge outlet support, a fourth pressing assembly used for fixing a fan inlet air duct and a fifth pressing assembly used for fixing a fan inlet support. The tool is used for solving the technical problems that an existing air entraining precooler on an airplane is not provided with a special overhauling tool, and the precooler is inconvenient to overhaul, replace a core and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of repair frock, concretely relates to a big repair frock of air bleed pre-cooler. BACKGROUND

[0002] The air bleed system of the airplane is used for providing compressed air for each user system of the airplane, and the air bleed source includes the engine and the APU. However, the air bleed from the engine and the APU has a very high temperature, and needs to enter the pre-cooler before entering the air source manifold. The pre-cooler is used as an air-air heat exchanger to cool the entering air bleed. In order to prolong the service life, the pre-cooler needs to be regularly overhauled, repaired, and replaced with a new core.

[0003] However, since the pre-cooler is imported from abroad, there is no corresponding special frock in the prior art to facilitate the adjustment of the position of the pre-cooler during the operation of overhauling, repairing, and replacing the core, which causes difficulties in the process of overhauling, repairing, and replacing the core of the pre-cooler. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a big repair frock of air bleed pre-cooler, which is used to solve the technical problem that there is no special repair frock for the air bleed pre-cooler on the current airplane, and it is inconvenient to overhaul, replace the core, and the like of the pre-cooler.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a big repair frock of air bleed pre-cooler, the big repair frock includes a vehicle frame and a positioning plate adjustably connected to the vehicle frame, a first compression assembly for fixing a hot side inlet air duct, a second compression assembly for fixing a hot side outlet air duct, a third compression assembly for fixing a hot side outlet support, a fourth compression assembly for fixing a fan inlet air duct, and a fifth compression assembly for fixing a fan inlet support are arranged on the positioning plate;

[0006] The first compression assembly includes a first compression disc capable of moving along the central axis of the hot side inlet air duct, a clamping assembly capable of fine adjustment of moving radially on the first compression disc, and a first locking mechanism for locking the moving position of the first compression disc. The clamping assembly includes a clamping block, an adjusting rod perpendicularly connected to the clamping block, and a locking nut connected to the adjusting rod. A slotted flange matching the hot side inlet air duct is arranged on the clamping block. The adjusting rod passes through a long circular hole arranged on the first compression disc and extending radially on the compression disc;

[0007] The second compression assembly includes a second compression disc capable of moving along the central axis of the hot side outlet air duct, and a second locking mechanism for locking the moving position of the second compression disc;

[0008] The third pressing assembly comprises a third locking block capable of moving horizontally to the position of the hot edge exit support and a third locking mechanism for locking the moving position of the third locking block; the third locking block is provided with locking holes corresponding to the mounting holes on the hot edge exit support;

[0009] The fourth pressing assembly comprises a fourth pressing disc capable of moving along the central axis of the fan inlet air duct and a fourth locking mechanism for locking the moving position of the fourth pressing disc;

[0010] The fifth pressing assembly comprises a fifth locking block capable of moving horizontally to the position of the fan inlet support and a fifth locking mechanism for locking the moving position of the fifth locking block; the fifth locking block is provided with locking holes corresponding to the mounting holes on the fan inlet support.

[0011] Preferably, the clamping assembly is provided with at least three, which are uniformly distributed along the circumference of the first pressing disc.

[0012] Preferably, the first pressing disc is provided with a limiting protrusion matching the inner hole of the hot edge inlet air duct.

[0013] Preferably, the first locking mechanism comprises a support, a sliding hole transversely penetrating through the support, a sliding rod slidingly connected in the sliding hole, a locking hole longitudinally arranged on the support and communicating with the sliding hole, and a fastening plug rod screwedly connected in the locking hole, and the first pressing disc is fixedly connected at the end of the sliding rod; the support is arranged in angle and inclination with the hot edge inlet air duct.

[0014] Preferably, the end of the sliding rod away from the first pressing disc is vertically connected with an operation handle.

[0015] Preferably, the second locking mechanism, the third locking mechanism, the fourth locking mechanism and the fifth locking mechanism are all the same in structure as the first locking mechanism, and all comprise a support, a sliding hole, a sliding rod, a locking hole, a fastening plug rod and an operation handle.

[0016] Preferably, the positioning plate is provided with an inspection hole at the position corresponding to the placement of the pre-cooler.

[0017] The technical scheme of the utility model has the beneficial effects that:

[0018] The utility model discloses a positioning plate is provided with the compression assembly for fixing the pre -cooler upper import and export air flue, fan import air flue and each support, for fixing the pre -cooler on the positioning plate, and cooperate the adjustable connection between the positioning plate and support, to facilitate the position or angle of pre -cooler adjustment, facilitate the pre -cooler overhaul, renovation or core operation such as changing. Through setting up the clamping assembly on the first compression disc, the flange at the air flue mouth is clamped after the first compression disc top pressure hot edge import air flue, and the locking hole corresponding with the mounting hole on each support is set up on the third locking block, the fifth locking block, convenient connection through bolt, rivet etc., guarantee the firm degree of pre -cooler fixed, improve the fixed security when adjusting the pre -cooler position. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is an embodiment overall schematic view of a bleed air pre-cooler overhaul tool;

[0020] Fig. 2 It is an embodiment first compression assembly schematic view of a bleed air pre-cooler overhaul tool;

[0021] Fig. 3 It is a bleed air pre-cooler schematic view.

[0022] Among them, Figs. 1-3 Among them, 1-first compression assembly, 11-first compression disc, 111-long round hole, 12-stand, 13-sliding rod, 14-fastening plug rod, 15-operation handle, 16-clamping block, 161-slotted, 17-adjusting rod, 18-locking nut, 2-second compression assembly, 21-second compression disc, 22-second locking mechanism, 3-third compression assembly, 31-third locking block, 32-third locking mechanism, 4-fourth compression assembly, 41-fourth compression disc, 42-fourth locking mechanism, 5-fifth compression assembly, 51-fifth locking block, 52-fifth locking mechanism, 6-sixth compression assembly, 61-sixth locking block, 62-second locking mechanism, 7-positioning plate, 8-support, 9-rotary positioning structure. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, and do not limit the scope of the utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] It should be noted that the main body of the bleed air precooler has a hot-edge inlet air duct, a hot-edge outlet air duct, and a fan inlet air duct. A hot-edge outlet support is installed near the hot-edge outlet air duct, and a fan inlet support is installed near the main body of the fan inlet air duct. In addition, in some other bleed air precoolers, a hot-edge inlet support is installed on the main body near the hot-edge inlet air duct.

[0027] The specific implementation method is as follows:

[0028] Example 1, such as Figs. 1-3 As shown, a bleed air precooler overhaul fixture includes a frame 8 and a positioning plate 7. The positioning plate 7 is used to place the bleed air precooler. Both ends of the positioning plate 7 are rotatably connected to the frame 8 via rotating shafts, allowing the positioning plate 7 to rotate 360° relative to the frame 8. A rotary positioning structure is connected to the end of one of the rotating shafts extending out of the frame 8. This structure serves two purposes: driving the positioning plate 7 to rotate and locking the rotation angle of the positioning plate 7 to adjust the angle of the bleed air precooler, reducing maintenance difficulty and improving work efficiency. The rotary positioning structure is existing technology and includes a reducer connected to the rotating shaft and a handwheel connected to the reducer. It also includes a positioning pin horizontally mounted on the frame and a mounting plate that rotates synchronously with the rotating shaft. The mounting plate has multiple circumferentially arranged insertion holes that mate with the positioning pins. Rollers are also provided at the bottom of the frame 8 to facilitate the overall movement of the overhaul fixture.

[0029] The first pressing assembly 1, the second pressing assembly 2, the third pressing assembly 3, the fourth pressing assembly 4 and the fifth pressing assembly 5 are arranged on the positioning plate 7 and used for fixing the air pre-cooler on the positioning plate 7.

[0030] The first pressing assembly 1 is arranged at a position corresponding to the hot side inlet air duct of the air pre-cooler and used for pressing the hot side inlet air duct of the air pre-cooler. The first pressing assembly 1 comprises a first pressing disc 11, a clamping assembly and a first locking mechanism. The first pressing disc 11 is movably connected to the first locking mechanism and can move along the central axis of the hot side inlet air duct relative to the first locking mechanism. The first locking mechanism can lock the position of the first pressing disc 11 to ensure that the first pressing disc 11 abuts against the end of the hot side inlet air duct for positioning.

[0031] The clamping assembly is arranged on the first pressing disc 11 and can be adjusted along the radial direction of the first pressing disc 11. The clamping assembly comprises a clamping block 16, an adjusting rod 17 and a locking nut 18. A long circular hole 111 extending along the radial direction of the first pressing disc 11 is arranged on the first pressing disc 11. The adjusting rod 17 passes through the long circular hole 111. One end of the adjusting rod 17 is perpendicularly connected to the clamping block 16, and the other end of the adjusting rod 17 is threadedly connected to the locking nut 18. One side of the clamping block 16 is provided with a slotted hole 161 matching the flange shape of the end of the hot side inlet air duct. The first pressing disc 11 moves to abut against the hot side inlet air duct. The position of the clamping block 16 is adjusted through the long circular hole 111 so that the slotted hole 161 is clamped at the flange, thereby realizing the connection between the end of the hot side inlet air duct and the first pressing disc 11 and ensuring the firmness of the positioning of the air pre-cooler.

[0032] The second pressing assembly 2 is arranged at a position corresponding to the hot side outlet air duct and used for pressing the hot side outlet air duct of the air pre-cooler. The second pressing assembly 2 comprises a second pressing disc 21 and a second locking assembly 22. The second pressing disc 21 is movably connected to the second locking assembly 22 and can move along the central axis of the hot side outlet air duct relative to the second locking assembly 22. The second locking assembly 22 can lock the position of the second pressing disc 21 to ensure that the second pressing disc 21 abuts against the hot side outlet air duct.

[0033] The third pressing assembly 3 is arranged at a position corresponding to the hot side outlet support of the air pre-cooler and used for connecting and positioning the hot side outlet support. The third pressing assembly 3 comprises a third locking block 31 and a third locking mechanism 32. The third locking block 31 is movably connected to the third locking mechanism 32 and can move horizontally and reciprocally. The third locking mechanism 32 can also lock the position of the third locking block 31. The third locking block 31 is provided with a locking hole. The locking hole is matched with a mounting hole on the lower connecting lug of the hot side outlet support. The third locking block 31 moves to the hot side outlet support and makes the locking hole aligned with the mounting hole. The two are connected through screws or rivets, thereby realizing the fixation of the hot side outlet support.

[0034] The fourth pressing assembly 4 is positioned at a position corresponding to the fan inlet air duct of the air-ledging precooler, and is used for abutting and positioning the fan inlet air duct. The fourth pressing assembly 4 comprises a fourth pressing disc 41 and a fourth locking mechanism 42. The fourth pressing disc 41 is movably connected to the fourth locking mechanism 42 and can reciprocate relative to the fourth locking mechanism 42 along the central axis of the fan inlet air duct. The fourth locking mechanism 42 can also lock the position of the fourth pressing disc 41, so as to abut and position the fan inlet air duct.

[0035] The fifth pressing assembly 5 is positioned at a position corresponding to the fan inlet support of the fan inlet air duct, and is used for fixing the fan inlet support. The fifth pressing assembly 5 comprises a fifth locking block 51 and a fifth locking mechanism 52. The fifth locking block 51 is provided with two locking holes corresponding to the mounting holes of the two connecting ears of the fan inlet support. The fifth locking block 51 is movably connected to the fifth locking mechanism 52 and can be locked in position by the fifth locking mechanism 52. After the fifth locking block 51 is moved to align the locking holes with the mounting holes, the fifth locking block 51 and the fan inlet support are connected by screws or rivets, so as to fix the fan inlet support.

[0036] In other embodiments, according to the use requirements, clamping assemblies are arranged on the second pressing disc and the fourth pressing disc, so as to ensure the stability of the air-ledging precooler. Other structures are not described here.

[0037] In other embodiments, corresponding to some air-ledging precoolers with hot-edge inlet supports, the positioning plate 7 is further provided with a sixth pressing assembly 6. The sixth pressing assembly 6 comprises a sixth locking block 62 and a sixth locking mechanism 62. The sixth locking block 62 is provided with locking holes corresponding to the mounting holes of the hot-edge inlet support. The sixth locking block 61 is movably connected to the sixth locking mechanism 62 and can reciprocate horizontally. When the sixth locking block 61 is moved to align the locking holes with the mounting holes, the sixth locking mechanism 62 is used to lock the position, and the sixth locking block 61 and the hot-edge inlet support are connected by screws or rivets, so as to ensure the firmness of the air-ledging precooler.

[0038] The air guide pre-cooler overhaul tool of the embodiment is used in the following manner: the air guide pre-cooler is placed on the corresponding position of the positioning plate 7, the components on the positioning plate 7 are adjusted, the first pressing disc 11 abuts against the hot edge inlet air duct, the pressing block 16 clamps the flange of the hot edge inlet air duct, the second pressing disc 21 abuts against the hot edge outlet air duct, the fourth pressing disc 41 abuts against the fan inlet air duct, the third locking block 31 is connected to the hot edge outlet support, and the fifth locking block 51 is connected to the fan inlet support, so that the air guide pre-cooler is stably and fixedly connected to the positioning plate 7. According to the need, the positioning plate 7 is flipped relative to the frame 8, the angle is fixed through the rotating positioning structure, the air guide pre-cooler is flipped at an angle during the maintenance or repair by the staff, and the convenience and work efficiency of the maintenance are improved.

[0039] Further, the clamping assembly is provided with at least three, which are uniformly distributed along the circumference of the first pressing disc 11, and are in a triangular clamping mode in the clamping and fixing flange mode, so as to ensure the firmness of the positioning and connection of the hot edge inlet air duct.

[0040] Further, in order to ensure the tightness of the abutment between the first pressing disc 11 and the hot edge inlet air duct, a limiting protrusion is arranged on the first pressing disc 11 and matches the inner hole of the hot edge inlet air duct, so as to avoid the shaking and instability of the air guide pre-cooler.

[0041] In other embodiments, limiting protrusions are arranged on the second pressing disc and the fourth pressing disc according to the need, and other structures are not described herein.

[0042] Further, the first locking mechanism comprises a support 12, a sliding hole, a sliding rod 13, a locking hole and a fastening plug rod 14. The support 12 is connected to the positioning plate 7 in a detachable mode, and is provided with a certain inclination angle according to the angle of each air duct or support, so as to ensure the movement of the pressing disc along the central axis of each air duct. The support 12 is provided with a transversely penetrating sliding hole, the sliding rod 13 penetrates and is connected in the sliding hole, the end of the sliding rod 13 is connected to the first pressing disc 11, a locking hole is longitudinally arranged on the top of the support 12 and communicates with the sliding hole, and the fastening plug rod 14 is connected to the locking hole in a threaded mode. The fastening plug rod 14 is pressed downward to clamp the sliding rod 13 for positioning, so as to lock the position of the first pressing disc 11 and realize the stepless adjustment of the position of the first pressing disc 11.

[0043] In other embodiments, a plurality of positioning holes are arranged on the sliding rod and match the lower end of the fastening plug rod 14, so as to ensure the firmness of the locking position of the first pressing disc, and other structures are not described herein.

[0044] Further, an operation handle 15 is vertically connected to the end of the sliding rod 13 away from the first pressing disc 11, so as to facilitate the hand holding of the user and the operation.

[0045] Further, the second locking mechanism 21, the third locking mechanism 31, the fourth locking mechanism 41, the fifth locking mechanism 51 and the sixth locking mechanism 6 are all the same structure as the first locking mechanism, all comprising a support, a sliding hole, a sliding rod, a locking hole, a fastening rod and an operating handle; wherein the position of the locking hole is set on the top or the side wall of the support according to applicability, and the fastening rod is inserted into the locking hole to position the sliding rod.

[0046] Further, the second locking mechanism 21, the third locking mechanism 31, the fourth locking mechanism 41, the fifth locking mechanism 51 and the sixth locking mechanism 6 are all the same structure as the first locking mechanism, all comprising a support, a sliding hole, a sliding rod, a locking hole, a fastening rod and an operating handle; wherein the position of the locking hole is set on the top or the side wall of the support according to applicability, and the fastening rod is inserted into the locking hole to position the sliding rod.

[0047] The utility model is described above in combination with the drawings, obviously, the utility model is not limited by the above-mentioned mode in the specific implementation, as long as various non-essential improvements of the utility model technical scheme are adopted, or the conception and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. An air induction precooler overhaul tooling characterized by, The overhauling tool comprises a frame and a positioning plate connected to the frame, the positioning plate is provided with a first pressing assembly for fixing a hot edge inlet air duct, a second pressing assembly for fixing a hot edge outlet air duct, a third pressing assembly for fixing a hot edge outlet support, a fourth pressing assembly for fixing a fan inlet air duct and a fifth pressing assembly for fixing a fan inlet support; The first pressing assembly comprises a first pressing disc capable of moving along a central axis of the hot edge inlet air duct, a clamping assembly capable of fine adjustment of radial movement of the first pressing disc and a first locking mechanism for locking the moving position of the first pressing disc, the clamping assembly comprises a clamping block, an adjusting rod perpendicularly connected to the clamping block and a locking nut connected to the adjusting rod, the clamping block is provided with a slotted hole matched with a flange of the hot edge inlet air duct, and the adjusting rod passes through an oblong hole provided on the first pressing disc and extending radially along the pressing disc; The second pressing assembly comprises a second pressing disc capable of moving along a central axis of the hot edge outlet air duct and a second locking mechanism for locking the moving position of the second pressing disc; The third pressing assembly comprises a third locking block capable of moving horizontally to the position of the hot edge outlet support and a third locking mechanism for locking the moving position of the third locking block, and the third locking block is provided with a locking hole corresponding to a mounting hole on the hot edge outlet support; The fourth pressing assembly comprises a fourth pressing disc capable of moving along a central axis of the fan inlet air duct and a fourth locking mechanism for locking the moving position of the fourth pressing disc; The fifth pressing assembly comprises a fifth locking block capable of moving horizontally to the position of the fan inlet support and a fifth locking mechanism for locking the moving position of the fifth locking block, and the fifth locking block is provided with a locking hole corresponding to a mounting hole on the fan inlet support.

2. The overhauling tool for a bleed air precooler according to claim 1, characterized in that, The clamping assembly is provided with at least three, which are uniformly distributed circumferentially along the first pressing disc.

3. The overhauling tool for a bleed air precooler according to claim 2, characterized in that, The first pressing disc is provided with a limiting protrusion matched with an inner hole of the hot edge inlet air duct.

4. The overhauling tool for a bleed air precooler according to claim 3, characterized in that, The first locking mechanism comprises a support, a sliding hole transversely penetrating through the support, a sliding rod slidingly connected to the sliding hole, a locking hole longitudinally provided on the support and communicating with the sliding hole, and a fastening plug rod screwedly connected in the locking hole, and the first pressing disc is fixedly connected to an end of the sliding rod; the support is matched with an angularly inclined hot edge inlet air duct.

5. The overhauling tool for a bleed air precooler according to claim 4, characterized in that An operating handle is perpendicularly connected to an end of the sliding rod away from the first pressing disc.

6. The overhauling tool for a bleed air precooler according to claim 5, characterized in that The second locking mechanism, the third locking mechanism, the fourth locking mechanism and the fifth locking mechanism are all the same as the first locking mechanism in structure, and all comprise a support, a sliding hole, a sliding rod, a locking hole, a fastening plug rod and an operating handle.

7. The overhauling tooling for a bleed air precooler according to any one of claims 1-6, characterized in that, The positioning plate is provided with an access hole at a position corresponding to the placement of a pre-cooler.

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