CN220863317U - Special tool for repairing fan shroud of CFM56 engine - Google Patents
Special tool for repairing fan shroud of CFM56 engine Download PDFInfo
- Publication number
- CN220863317U CN220863317U CN202322525125.3U CN202322525125U CN220863317U CN 220863317 U CN220863317 U CN 220863317U CN 202322525125 U CN202322525125 U CN 202322525125U CN 220863317 U CN220863317 U CN 220863317U
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- positioning block
- engine
- cover ring
- hole
- engine cover
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- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000008439 repair process Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
A special fixture for repairing a CFM56 type engine fan shroud relates to the technical field of aircraft maintenance, a positioning block is arranged on the outer edge of the engine shroud, the arc surface of the positioning block is in contact with the outer end surface of the engine shroud, a bolt II passes through a mounting hole I and then is screwed into a body nut arranged on the engine shroud, the positioning block is fixed on the engine shroud, at the moment, an inner sleeve is coaxial with a structural hole of the shroud to be machined, a reamer is inserted into the inner sleeve to rotate the reamer, the structural hole of the cracked shroud can be reamed, after finishing reaming, metal scraps are cleaned, the bolt II is loosened, and the positioning block is taken down. By using the special tool, human errors can be reduced, the maintenance quality can be improved, and the industrialization process of repair can be accelerated.
Description
Technical Field
The utility model relates to the technical field of aircraft maintenance, in particular to a special tool for repairing a fan shroud of a CFM56 type engine.
Background
The engine fan outlet guide vane assembly consists of a casing inner shroud and circumferential guide vanes, and is used for guiding and smoothing airflow and improving the propulsion efficiency of the engine. If the inner cover ring is damaged, the phenomena of loosening, falling-off and the like of the blades can be caused. Blade shedding on the one hand causes a reduction in propulsion efficiency, increases fuel consumption, and more seriously may also cause associated damage to other engine components in the rear.
According to the inspection and maintenance standards of engine manufacturers, the inner cover ring is not allowed to be damaged such as cracks. Currently, neither the manufacturer of the engine nor the approved engine repair shop has a mature tooling for repairing the engine at the wing. After the cover ring is damaged, the whole engine needs to be repaired, and the cost is very high. In addition, the number of engine major repair manufacturers capable of executing the repair in China is small, and the productivity is seriously insufficient. If the aircraft is to be repaired abroad, the requirements of the aircraft operation are difficult to meet, and the utilization rate of the aircraft is affected.
According to the requirements of engine manufacturers, reaming is needed after the structural holes of the cover ring are cracked, and then a special bushing is installed for repairing. Because the working space on the engine is narrow, the shroud ring structure is complex, the reaming aperture is larger, the wing repair is difficult in practice, the requirements on personnel skills are extremely high, and the engine parts can be scrapped due to small deviation, so that immeasurable loss is caused.
Disclosure of Invention
In order to overcome the defects of the technology, the utility model provides a special tool for repairing the fan cover ring of the CFM56 engine, which reduces human errors and improves maintenance quality.
The technical scheme adopted for overcoming the technical problems is as follows:
A special tooling for repairing a CFM56 engine fan shroud, comprising:
The upper end surface of the positioning block is an arc surface matched with the outer diameter of the engine cover ring;
the mounting hole I is arranged on the positioning block along the vertical direction;
The through hole is arranged on the positioning block, and when the arc surface of the positioning block is contacted with the outer end surface of the engine cover ring and the bolt II passes through the mounting hole I and then is screwed into the body nut arranged on the engine cover ring, the through hole is coaxial with the corresponding structural hole of the engine cover ring;
the outer diameter of the connecting sleeve is matched with the inner diameter of the through hole, and the connecting sleeve is inserted into the through hole;
The outer diameter of the inner sleeve is matched with the inner diameter of the connecting sleeve, the inner sleeve is inserted into the inner hole of the connecting sleeve, and the inner diameter of the inner sleeve is matched with the outer diameter of the reamer.
Further, a boss is arranged on the positioning block, the size of the boss is matched with that of the long groove on the engine cover ring, and when the positioning block is installed on the engine cover ring, the boss is inserted into the corresponding long groove.
Further, two mounting holes II are formed in the boss, the screw is inserted into the mounting holes II, a pressing plate is fixed to the upper end of the screw, the lower end face of the pressing plate is in contact with the upper end face of the engine cover ring, and the lower end of the screw is locked and fixed through nuts and gaskets.
Further, a groove is formed in the front end of the positioning block in the circumferential direction of the circular arc surface, and when the positioning block is mounted on the engine cover ring, a flange on the engine cover ring is inserted into the groove of the positioning block.
Preferably, the mounting hole I is a countersunk hole.
Further, a flange is arranged at the head end of the connecting sleeve, a plurality of bolts I are inserted into the flange along the circumferential direction, and when the connecting sleeve is inserted into the through hole, the bolts I are screwed into the positioning blocks.
The beneficial effects of the utility model are as follows: the positioning block is arranged on the outer edge of the engine cover ring, the arc surface of the positioning block is contacted with the outer end surface of the engine cover ring, the bolt II passes through the mounting hole I and then is screwed into a body nut arranged on the engine cover ring, the positioning block is fixed on the engine cover ring, at the moment, the inner sleeve is coaxial with a structural hole of the cover ring to be processed, the reamer is inserted into the inner sleeve, the reamer is rotated, the structural hole of the cover ring with cracks can be reamed, after finishing reaming, the metal scraps are cleaned, the bolt II is loosened, and the positioning block is taken down. By using the special tool, human errors can be reduced, the maintenance quality can be improved, and the industrialization process of repair can be accelerated.
Drawings
FIG. 1 is a schematic perspective view of an engine shroud;
FIG. 2 is an exploded view of a three-dimensional structure of the present utility model;
FIG. 3 is a schematic view of the structure of the C-direction in FIG. 2;
FIG. 4 is a schematic view of the cross-sectional structure of the A-A direction in FIG. 2;
FIG. 5 is a schematic view of the B-B cross-sectional structure of FIG. 2;
In the figure, 1, an engine cover ring 2, a long groove 3, a positioning block 4, an arc surface 5, a groove 6, a boss 7, a mounting hole I8, a mounting hole II 9, a through hole 10, a connecting sleeve 11, a flange 12, a flange 13, an inner sleeve 14, a reamer 15, a screw 16, a pressing plate 17, a gasket 18, a nut 19, a bolt II 20 and a body nut.
Detailed Description
The utility model is further described with reference to fig. 1 to 5.
A special tooling for repairing a CFM56 engine fan shroud, comprising: the upper end surface of the positioning block 3 is an arc surface 4 matched with the outer diameter of the engine cover ring 1; the mounting hole I7 is arranged on the positioning block 3 along the vertical direction; the through hole 9 is arranged on the positioning block 3, and when the arc surface 4 of the positioning block 3 is contacted with the outer end surface of the engine cover ring 1 and the bolt II 19 passes through the mounting hole I7 and then is screwed into the body nut 20 arranged on the engine cover ring 1, the through hole 9 is coaxial with the corresponding structural hole of the engine cover ring 1; the outer diameter of the connecting sleeve 10 is matched with the inner diameter of the through hole 9, and the connecting sleeve 10 is inserted into the through hole 9; an inner sleeve 13, the outer diameter of which is matched with the inner diameter of the connecting sleeve 10, the inner sleeve 13 is inserted into the inner hole of the connecting sleeve 10, and the inner diameter of the inner sleeve 13 is matched with the outer diameter of the reamer 14. When the engine cover ring is used, the positioning block 3 is arranged on the outer edge of the engine cover ring 1, the arc surface 4 of the positioning block 3 is in contact with the outer end surface of the engine cover ring 1, the bolt II 19 passes through the mounting hole I7 and then is screwed into the body nut 20 arranged on the engine cover ring 1, the positioning block 3 is fixed on the engine cover ring 1, at the moment, the inner sleeve 13 is coaxial with a structural hole of the cover ring to be processed, the reamer 14 is inserted into the inner sleeve 13, the reamer 14 is rotated, the structural hole of the cover ring with cracks can be reamed, after the reamed hole is finished, the bolt II 19 is loosened, and the positioning block 3 is taken down. By using the special tool, human errors can be reduced, the maintenance quality can be improved, and the industrialization process of repair can be accelerated. The inner sleeve 13 can be conveniently taken out of the connecting sleeve 10, the inner sleeve 13 can be conveniently replaced, the inner diameter of the inner sleeve 13 is matched with that of the reamer 14 with different specifications, and the inner sleeves 13 with different inner diameters can be manufactured according to different specifications of the reamer 14, so that the cover ring structure holes with different specifications can be conveniently processed, and the convenience and the suitability of operation are improved.
In one embodiment of the present utility model, the positioning block 3 is provided with a boss 6, the size of the boss 6 is matched with the size of the long groove 2 on the engine cover ring 1, and when the positioning block 3 is mounted on the engine cover ring 1, the boss 6 is inserted into the corresponding long groove 2. The boss 6 is inserted into the long groove 2 of the engine cover ring 1, so that the positioning accuracy of the whole special tool and the engine cover ring 1 can be improved, and meanwhile, the connection strength of the special tool and the engine cover ring 1 is improved due to the cooperation of the boss 6 and the long groove 2.
In one embodiment of the utility model, two mounting holes II 8 are formed in the boss 6, a screw 15 is inserted into the mounting holes II 8, a pressing plate 16 is fixed at the upper end of the screw 15, the lower end face of the pressing plate 16 contacts with the upper end face of the engine cover ring 1, and the lower end of the screw 15 is locked and fixed through a nut 18 and a gasket 17. By arranging the screw 15, one end of the screw 15 is fixed at the lower end of the positioning block 3 by using the nut 18 and the gasket 17, and the upper end of the screw is pressed on the engine cover ring 1 by the pressing plate 16, so that the connection and fixation of the engine cover ring 1 and the positioning block 3 are realized, and the fixation firmness is further improved.
In one embodiment of the present utility model, the front side end of the positioning block 3 is provided with a groove 5 in the circumferential direction of the circular arc surface, and when the positioning block 3 is mounted on the engine cover ring 1, the flange on the engine cover ring 1 is inserted into the groove 5 of the positioning block 3. The grooves 5 are arranged simultaneously, so that the flange on the engine cover ring 1 is inserted into the grooves 5, and the connection firmness of the whole special tool in the axial direction of the engine cover ring 1 can be improved.
In one embodiment of the utility model, the mounting hole I7 is a counter bore. By arranging the countersunk holes, the bolts II 19 can be embedded into the countersunk holes, and the attractiveness and safety are improved.
In one embodiment of the utility model, the head end of the connecting sleeve 10 is provided with the flange 11, a plurality of bolts I12 are inserted on the flange 11 along the circumferential direction, and when the connecting sleeve 10 is inserted into the through holes 9, the bolts I12 are screwed into the positioning block 3, so that the connecting sleeve 10 is conveniently fixed on the positioning block 3, and the installation and the disassembly are convenient.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. A special tooling for repairing a fan shroud of a CFM56 engine, comprising:
The upper end surface of the positioning block (3) is an arc surface (4) matched with the outer diameter of the engine cover ring (1);
The mounting hole I (7) is arranged on the positioning block (3) along the vertical direction;
The through hole (9) is arranged on the positioning block (3), and when the arc surface (4) of the positioning block (3) is contacted with the outer end surface of the engine cover ring (1) and the bolt II (19) passes through the mounting hole I (7) and then is screwed into the body nut (20) arranged on the engine cover ring (1), the through hole (9) is coaxial with the corresponding structural hole of the engine cover ring (1);
The outer diameter of the connecting sleeve (10) is matched with the inner diameter of the through hole (9), and the connecting sleeve (10) is inserted into the through hole (9);
The outer diameter of the inner sleeve (13) is matched with the inner diameter of the connecting sleeve (10), the inner sleeve (13) is inserted into the inner hole of the connecting sleeve (10), and the inner diameter of the inner sleeve (13) is matched with the outer diameter of the reamer (14).
2. The special tooling for repairing a fan shroud of a CFM56 engine of claim 1, wherein: the positioning block (3) is provided with a boss (6), the size of the boss (6) is matched with the size of the long groove (2) on the engine cover ring (1), and when the positioning block (3) is installed on the engine cover ring (1), the boss (6) is inserted into the corresponding long groove (2).
3. The special tooling for repairing a fan shroud of a CFM56 engine of claim 2, wherein: two mounting holes II (8) are formed in the boss (6), a screw rod (15) is inserted into the mounting holes II (8), a pressing plate (16) is fixed at the upper end of the screw rod (15), the lower end face of the pressing plate (16) is in contact with the upper end face of the engine cover ring (1), and the lower end of the screw rod (15) is locked and fixed through a nut (18) and a gasket (17).
4. The special tooling for repairing a fan shroud of a CFM56 engine of claim 1, wherein: the front side end of the positioning block (3) is provided with a groove (5) along the circumferential direction of the arc surface, and when the positioning block (3) is installed on the engine cover ring (1), a flange on the engine cover ring (1) is inserted into the groove (5) of the positioning block (3).
5. The special tooling for repairing a fan shroud of a CFM56 engine of claim 1, wherein: the mounting hole I (7) is a countersunk hole.
6. The special tooling for repairing a fan shroud of a CFM56 engine of claim 1, wherein: the head end of the connecting sleeve (10) is provided with a flange (11), a plurality of bolts I (12) are inserted on the flange (11) along the circumferential direction, and when the connecting sleeve (10) is inserted into the through hole (9), the bolts I (12) are screwed in the positioning block (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322525125.3U CN220863317U (en) | 2023-09-18 | 2023-09-18 | Special tool for repairing fan shroud of CFM56 engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322525125.3U CN220863317U (en) | 2023-09-18 | 2023-09-18 | Special tool for repairing fan shroud of CFM56 engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220863317U true CN220863317U (en) | 2024-04-30 |
Family
ID=90818541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322525125.3U Active CN220863317U (en) | 2023-09-18 | 2023-09-18 | Special tool for repairing fan shroud of CFM56 engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220863317U (en) |
-
2023
- 2023-09-18 CN CN202322525125.3U patent/CN220863317U/en active Active
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