CN114654187A - Fuel main pipe assembly fault resetting device and method - Google Patents
Fuel main pipe assembly fault resetting device and method Download PDFInfo
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- CN114654187A CN114654187A CN202210412113.7A CN202210412113A CN114654187A CN 114654187 A CN114654187 A CN 114654187A CN 202210412113 A CN202210412113 A CN 202210412113A CN 114654187 A CN114654187 A CN 114654187A
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- screw
- support
- fuel manifold
- clamping jaw
- pipe joint
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
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- Mechanical Engineering (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a fuel manifold assembly fault resetting device and method, which comprises a top block and a clamping jaw; the clamping jaws are circumferentially arranged on the ejector block and used for clamping the pipe joint flange mounting seat; the clamping jaw is arranged in the ejector block rotating hole through a rotating pin and rotates around the rotating pin; the claw part at the other end of the claw is a conical surface and is contacted with the pipe joint flange mounting seat during working; the screw-in type thread bushing is arranged at the center of the top block; the compression screw is in threaded connection with the screwed-in type threaded bushing, a support is arranged at the end of the compression screw, supporting rods are circumferentially arranged on the support and are connected with supporting legs, and the supporting legs are in contact with the molded surface of the casing. The oil inlet pipe joint can be reset by using the device, and sufficient tensile force is generated in the resetting process to change the deformation caused by the stress generated by the pipeline in the trial run process, so that the original design position of the oil inlet pipe joint is recovered. And meanwhile, the uniform and slow force application process is ensured, and the damage to the pipeline caused by the nonuniform force application is avoided.
Description
Technical Field
The invention belongs to the technical field of assembly and test run of aero-engines, and particularly belongs to a fuel manifold assembly fault resetting device and method.
Background
The aeroengine parts have high processing precision and strict assembly technical requirements. The method not only requires that the product quality of engine parts must meet the technical requirements of complete machine assembly, but also ensures that the product state after the test run of a factory and the inspection of the test run still meets the product quality requirements before the delivery of the engine from the factory. After the test run examination stage, a certain amount of deformation or assembly (hinge assembly) position change exists in the actual product, which is caused by different expansion degrees of parts in different materials, thicknesses, design structures and different assembly states in the test run environment with high temperature, high pressure, high rotating speed and even high load. The afterburner mainly comprises a cylinder body of a metal plate welding structure and a fuel main pipe which is welded in a machining mode, and in the afterburner working state, due to the fact that parts are heated unevenly and assembly stress is released, the fuel main pipe oil inlet pipe joint sinks after a part of engines are tested, and the flange mounting seat is clamped and cannot be detached. Therefore, the oil inlet pipe joint needs to be reset to restore the original design position. In the prior art, the joint of the oil inlet pipe of the fuel main pipe is reset, excessive force application and uneven force application process cause the cracks of the welding line of the fuel main pipe or the deformation of other parts, and the assembly quality can not be ensured.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a fuel main pipe assembly fault resetting device and method, which solve the problem that a fuel pipe cannot be reset due to sinking of an oil inlet pipe joint of a fuel main pipe of an afterburner and clamping stagnation of a mounting seat. Can reset advancing oil pipe connector through using this device, produce enough pulling force in the reset process and in order to change the deformation that the stress that the in-process pipeline produced of taking a trial run caused, resume its original design position. And meanwhile, the uniform and slow force application process is ensured, and the damage to the pipeline caused by the nonuniform force application is avoided.
In order to achieve the purpose, the invention provides the following technical scheme:
a fuel main pipe assembly fault resetting device comprises a top block, a clamping jaw, a compression screw, a screw-in type threaded bushing, a support rod, a support leg and a rotating pin;
the clamping jaws are circumferentially arranged on the ejector block and used for clamping the pipe joint flange mounting base;
the clamping jaw is arranged in the ejector block rotating hole through a rotating pin and rotates around the rotating pin; the claw part at the other end of the claw is a conical surface and is contacted with the pipe joint flange mounting seat during working;
the screwing-in type thread bushing is arranged at the center of the top block; the compression screw is in threaded connection with the screwed-in type threaded bushing, a support is arranged at the end of the compression screw, supporting rods are circumferentially arranged on the support and are connected with supporting legs, and the supporting legs are in contact with the molded surface of the casing.
Preferably, the jaw has a degree of freedom of 1 in rotation about the pivot pin.
Preferably, a rubber pad is installed at one end of the supporting leg, and the rubber pad is in contact with the molded surface of the casing.
Preferably, the legs and struts are connected by a threaded swivel head.
Preferably, the jacking block is provided with a screw, and the screw is arranged at the rear end of the clamping jaw for limiting.
Preferably, the support rod and the support seat are fixed through a nut.
Preferably, the thread of the screw-in type threaded bushing is a fine thread.
Preferably, the number of the clamping jaws is 3, and the clamping jaws are uniformly and circumferentially arranged on the top block.
Preferably, a rotating lever is arranged on the compression screw.
A fuel main assembly fault resetting method is based on the fuel main assembly fault resetting device, and comprises the following processes,
the supporting legs prop against the molded surface of the casing; opening the clamping jaw, and adjusting the position of the clamping jaw to enable the conical surface of the clamping jaw to be in contact with the inner conical surface of the pipe joint flange mounting seat;
the rotary compression screw presses the support tightly, when the rotary compression screw presses the support tightly, the jacking block moves upwards, the jack catch moves upwards through the rotating pin, the slow pulling flange mounting seat and the fuel pipeline move outwards until the pipe joint flange mounting seat moves to a designed position, after the pipe joint flange mounting seat is shaped, the jack catch is detached from the pipe joint flange mounting seat, so that the jack catch is separated from the inner conical surface of the pipe joint flange mounting seat, and the resetting of the fuel main pipe joint is completed.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a fuel main pipe assembly fault resetting device, which is characterized in that a clamping jaw is arranged to be in contact with a pipe joint flange mounting seat, and the reaction force of threads is utilized to ensure that the force is uniformly applied in the working process. The part damage caused by unstable factors of manual force application is avoided; the positioning precision is high, and the force application direction is accurate. The connecting structure of the clamping jaws corrects the position of the ejector block, so that the ejector block moves along the axial direction of the oil inlet pipe; the problems of narrow space and difficult operation are solved. Force is exerted by three conical surfaces uniformly distributed at the inner side of the flange mounting seat, so that the contact surface of the mounting seat and the fuel pipe connector is stably attached, and the stress is uniform in the resetting process of the fuel pipe connector; the position of the supporting leg is flexibly adjusted, and the supporting is stable. The support legs have freedom degrees, and can adjust positions according to the molded surface of the casing surface and avoid weak parts such as pipeline welding seams and the like; novel structure, exquisiteness, light weight, convenient operation, stable and reliable use.
Furthermore, the stability of supporting the supporting legs is improved through the rubber pads, and parts are prevented from being damaged by hard contact.
Furthermore, the support legs and the support rods are connected through the thread movable heads, so that the positions of the support legs can be flexibly adjusted, pipeline welding seams are avoided, and the welding seams are prevented from being crushed.
Furthermore, the rotating lever is arranged on the compression screw, so that the rotating force is increased, and the reset effect is improved.
Drawings
FIG. 1 is a front view of a fuel manifold assembly fault reset device of the present invention;
FIG. 2 is a side sectional view of a fuel manifold assembly failure reset device of the present invention;
FIG. 3 is a front view of the flange mount of the present invention assembled with a fuel manifold fitting;
FIG. 4 is a side view of the flange mount and fuel manifold fitting assembly of the present invention;
FIG. 5 is a schematic view of a foot according to the present invention;
FIG. 6 is a schematic diagram of the operation of a fuel manifold assembly failure reset apparatus of the present invention;
in the drawings: 1 is a top block; 2 is a claw; 3 is a compression screw; 4 is a screw-in type thread bushing; 5 is a support; 6 is a supporting rod; 7 is a support leg; 8 is a nut; 9 is a screw; 10 is a rotating pin; 11 is a rubber pad; and 12 is a casing profile.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
Examples
The invention provides a fuel main pipe assembly fault resetting device which is used for resetting a fuel main pipe assembly fault after an aircraft engine is tested.
The invention discloses a fuel manifold assembly fault resetting device which comprises a top block 1, a clamping jaw 2, a compression screw 3, a screwed-in type threaded bushing 4, a support 5, a support rod 6, a support leg 7, a nut 8, a screw 9 and a rotating pin 10.
As shown in fig. 1 and 2, the jaw 2 is installed in the rotating hole of the top block 1 through a rotating pin 10, and the jaw 2 has only one degree of freedom around the rotating pin 10. The claw part at the other end of the claw 2 is a conical surface and is contacted with the pipe joint flange mounting seat during working, and the position is limited by a screw 9. The screwed-in type threaded bushing 4 is installed in a threaded hole in the center of the top block and fastened. The compression screw 3 is screwed into the fine thread in the thread bushing, and the other end is connected with the support 5 by a thread clamping groove structure. The supporting rod 6 is in threaded connection with a threaded mounting hole of the support 5 and is fixed through a nut 8. The supporting legs 7 and the supporting rods 6 are flexibly connected through threaded loose joints, rubber pads 11 are installed at one ends of the supporting legs 7, the loose joints ensure that the supporting legs 7 can be fully contacted with the casing molded surface 12 along with the type, the rubber pads 11 can enlarge the contact area, the pressure intensity is reduced, the stress is reduced, and the damage to the surface of the casing is prevented.
The invention relates to a fuel main assembly fault resetting method, which comprises the following processes,
when in use, the three support legs 7 of the device are firstly propped against the outer wall of the casing of the aero-engine to prevent being compressed and pressed on the welding seam of the pipeline of the casing. The angle of each leg 7 is adjusted so that the rubber pad 11 can sufficiently contact the casing until the device can be stabilized.
And (3) opening the clamping jaws 2, adjusting the position of each clamping jaw to enable the conical surface of each clamping jaw 2 to be in contact with the conical surface of the inner side of the flange mounting seat, and screwing the screw 9 to move downwards to push the upper parts of the clamping jaws tightly, wherein the conical surfaces of the clamping jaws 2 are inward hooked until reaching the inner conical surface of the flange mounting seat. The step is completed, the claw 2 mechanism realizes the function of tightly holding the flange mounting seat, the stress is uniform, the situation that the claw is disengaged during working can not occur, and the position of the ejector block is corrected, so that the ejector block can move along the axis direction of the oil inlet pipe.
After the aircraft engine is subjected to stress test, the fuel main fuel inlet pipe joint sinks after the test run of part of the engine due to uneven heating among parts and the release of assembly stress, and the faults that the flange mounting seat is blocked and cannot be detached and reset occur. As shown in fig. 3 and 4: depending on the shape of the flange mount, the only locations where the tool can be used to operate are: conical surfaces are uniformly distributed at three positions on the inner side of the flange mounting seat. Therefore, a design tool is needed to stably contact the conical surface and pull the flange mounting seat and the fuel pipe to the designed position towards the outer side. Because the flange mounting seat is not limited by angular positioning, the flange mounting seat can freely rotate around the pipe joint before the pipe joint is not mounted, so that the angular position of the flange mounting seat is random, the conical surface on the inner side has no fixed position, and the position of the flange mounting seat tightly embraced by the device needs to be adjusted according to the actual situation on site.
The afterburner mainly comprises a cylinder body with a metal plate welding structure and a fuel oil main pipe which is welded in a machining mode. Welded pipelines and welding seams are distributed on the casing, the positions of the supporting legs for supporting the casing need to avoid the pipeline welding seams on the casing, when the position of the flange mounting seat is fixed, the positions of the supporting legs need to be flexibly adjusted, the pipeline welding seams are avoided, and the welding seams are prevented from being damaged by pressure. As shown in fig. 5: the feet 7 also need to have freedom to adjust their position according to the surface profile of the casing. Theoretically, the contact between the leg 7 and the casing surface 12 is a line contact between a plane surface and a conical surface, which can cause unstable support and excessive contact pressure, so that the casing surface is damaged. Therefore, rubber pads 11 are added on the supporting legs 7, the contact area is enlarged by the compression deformation of the rubber, the line contact is changed into surface contact, the supporting stability of the supporting legs is improved, and the parts are prevented from being damaged by hard contact.
As shown in fig. 6: the spherical surface is used at one end of the compression screw 3, a groove is processed on the thread, and the compression screw 3 is screwed into the threaded hole of the support through threaded connection. The blind hole that the size is great is processed to screw hole rear end, and the screw thread of housing screw 3 front end gets into the blind hole after, and slot and screw thread break away from, and top screw 3 and support 5 are nimble to be connected and can not break away from. The structure can realize that the position and the angle of the supporting leg can be adjusted after the claw 2 is fixed. The three clamping jaws 2 are respectively contacted with the conical surfaces of the flange mounting seats, and the mounting angles are finely adjusted through the compression screws 9, so that the force application directions of the compression screws are the same with the axis of the oil inlet pipe.
When the compression screw 3 is screwed in through the threaded bushing 4, the bottom surface of the blind hole of the support 5 is compressed, and after the support is stressed, pressure is transmitted to the support leg 7 to prop against the casing tightly. Because the support can not move, the compression screw 3 rotates and can not advance, the counterforce drives the ejector block 1 to move in the opposite direction, and the ejector block 1 drives the clamping jaw 2 to grab the flange mounting seat to move outwards until the flange mounting seat is reset to a designed position.
The invention provides a fuel main pipe assembly fault resetting device which solves the problem that a fuel pipe cannot be reset due to sinking of an oil inlet pipe joint of a fuel main pipe of an afterburner and clamping stagnation of a mounting base. The application of force is uniform in the working process by utilizing the reaction force of the screw thread. The part damage caused by unstable factors of manual force application is avoided; the positioning precision is high, and the force application direction is accurate. The connecting structure of the clamping jaws corrects the position of the ejector block, so that the ejector block moves along the axial direction of the oil inlet pipe; the problems of narrow space and difficult operation are solved. Force is exerted by three conical surfaces uniformly distributed at the inner side of the flange mounting seat, so that the contact surface of the mounting seat and the fuel pipe connector is stably attached, and the stress is uniform in the resetting process of the fuel pipe connector; the position of the supporting leg is flexibly adjusted, and the supporting is stable. The support legs have freedom degrees, and can adjust positions according to the molded surface of the casing surface and avoid weak parts such as pipeline welding seams and the like; the rubber pad 11 increases the stability of the support leg and prevents the parts from being damaged by hard contact; novel structure, exquisiteness, light weight, convenient operation, stable and reliable use.
Claims (10)
1. The fuel main pipe assembly fault resetting device is characterized by comprising a top block (1), a clamping jaw (2), a compression screw (3), a screw-in type threaded bushing (4), a support (5), a support rod (6), a support leg (7) and a rotating pin (10);
the clamping jaws (2) are circumferentially arranged on the ejector block (1), and the clamping jaws (2) are used for clamping the pipe joint flange mounting base;
the clamping jaw (2) is arranged in a rotating hole of the ejector block (1) through a rotating pin (10), and the clamping jaw (2) rotates around the rotating pin (10); the claw part at the other end of the claw (2) is a conical surface and is contacted with the pipe joint flange mounting seat during working;
the screw-in type threaded bushing (4) is arranged at the center of the top block (1); the compression screw (3) is in threaded connection with the screwed-in type threaded bushing (4), a support (5) is arranged at the end of the compression screw (3), supporting rods (6) are circumferentially arranged on the support (5), the supporting rods (6) are connected with supporting legs (7), and the supporting legs (7) are in contact with the casing molded surface (12).
2. A fuel manifold assembly failure reset device according to claim 1 wherein the pawl (2) has 1 degree of freedom to rotate about the pivot pin (10).
3. The fuel manifold assembly failure reset device as claimed in claim 1, wherein one end of the support leg (7) is provided with a rubber pad (11), and the rubber pad (11) is in contact with the casing profile (12).
4. A fuel manifold assembly failure reset device according to claim 1 wherein the legs (7) and struts (6) are connected by threaded swivel joints.
5. The fuel manifold assembly fault resetting device as claimed in claim 1, characterized in that the jacking block (1) is provided with a screw (9), and the screw (9) is arranged at the rear end of the clamping jaw (2) for limiting.
6. A fuel manifold assembly fault reset device according to claim 1, characterized in that the support rod (6) is fixed to the support (5) by a nut (8).
7. A fuel manifold assembly failure reset device as claimed in claim 1 wherein the thread of the screw-in threaded bushing (4) is a fine thread.
8. A fuel manifold assembly failure reset device according to claim 1, characterized in that the number of the claws (2) is 3, and the claws are evenly and circumferentially arranged on the top block (1).
9. A fuel manifold assembly fault reset device according to claim 1, characterized in that a rotation lever is provided on the compression screw (3).
10. A fuel manifold assembling failure resetting method, characterized in that a fuel manifold assembling failure resetting device according to any one of claims 1 to 9, comprises the following procedures,
the supporting legs (7) are pressed against the casing molding surface (12); opening the clamping jaw (2), and adjusting the position of the clamping jaw (2) to enable the conical surface of the clamping jaw (2) to be in contact with the inner conical surface of the pipe joint flange mounting seat;
rotatory housing screw (3), housing screw (3) top tight support (5), when rotatory housing screw (3), kicking block (1) upward movement, through changeing round pin (10) pulling jack catch (2) upward movement, slow pulling flange mount pad and fuel pipeline outwards movement, move to the design position until coupling flange mount pad, treat coupling flange mount pad design back, lift jack catch (2) off from coupling flange mount pad, make jack catch (2) break away from the interior conical surface of coupling flange mount pad, accomplish the fuel manifold and connect and reset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210412113.7A CN114654187B (en) | 2022-04-19 | 2022-04-19 | Fuel oil main pipe assembly fault resetting device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210412113.7A CN114654187B (en) | 2022-04-19 | 2022-04-19 | Fuel oil main pipe assembly fault resetting device and method |
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| Publication Number | Publication Date |
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| CN114654187A true CN114654187A (en) | 2022-06-24 |
| CN114654187B CN114654187B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210412113.7A Active CN114654187B (en) | 2022-04-19 | 2022-04-19 | Fuel oil main pipe assembly fault resetting device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876646A (en) * | 2022-07-11 | 2022-08-09 | 成都中科翼能科技有限公司 | Supporting structure of gas turbine fuel main pipe and fuel main pipe assembly |
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| CN114654187B (en) | 2023-09-22 |
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