CN111703586A - Method for replacing reverse thrust C duct sliding rail structure of V2500 engine - Google Patents
Method for replacing reverse thrust C duct sliding rail structure of V2500 engine Download PDFInfo
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- CN111703586A CN111703586A CN202010392317.XA CN202010392317A CN111703586A CN 111703586 A CN111703586 A CN 111703586A CN 202010392317 A CN202010392317 A CN 202010392317A CN 111703586 A CN111703586 A CN 111703586A
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- duct
- reverse
- thrust
- rail structure
- engine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/40—Maintaining or repairing aircraft
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses a method for replacing a reverse thrust C duct sliding rail structure of a V2500 engine, which comprises the following steps of: (S1) acquiring a complete set of digital analogy of the reverse-thrust C duct of the V2500 engine through reverse engineering to obtain the structural size of the reverse-thrust C duct; (S2) manufacturing a frame according to the structural size of the reverse C duct; (S3) performing actual verification on the jig; (S4) manufacturing a joint arm, wherein the joint arm is arranged below the fixture, and the fixture positioning guide rail is also arranged below the joint arm; (S5) positioning the position of the old reverse C duct sliding rail structure through the section frame, the joint arm and the section frame positioning guide rail, then dismantling the old sliding rail structure, installing a new sliding rail structure in situ, and finally removing the section frame, the joint arm and the section frame positioning guide rail to realize the replacement of the reverse C duct sliding rail structure of the V2500 engine. According to the method, the accurate replacement of the reverse thrust C duct sliding rail of the V2500 engine can be realized by designing the fixture, the adjustable joint arm and the fixture positioning guide rail.
Description
Technical Field
The invention belongs to the technical field of aircraft maintenance, and particularly relates to a method for replacing a reverse thrust C duct slide rail structure of a V2500 engine.
Background
Each flight cycle is reverse-estimated to be actuated once, and each active airplane needs to execute 4 flight cycles and actuate 4 times on average each day. During landing and running of the aircraft, the thrust reverser structure is subjected to about 70% of the thrust of the aircraft engine and changes the thrust to the opposite direction, thereby rapidly reducing the aircraft speed. In the whole actuating process, the reverse thrust structure is subjected to complex high-temperature, high-vibration and high-stress effects. With the increase of service time, the structure damage of the reverse thrust structure is easy to occur, wherein the wear of the slide rail of the reverse thrust C duct is the most common.
After the slide rail is abraded, the vibration is aggravated when the reverse thrust is actuated under the slight condition, the efficiency is reduced, the blocking of an actuating mechanism is caused under the severe condition, the landing and sliding attitude of an airplane is influenced, the failure of the whole actuating system can be caused by the further development, the non-inclusiveness of structural components is lost, and the inestimable influence is brought to the flight safety.
The C duct slide rail structure is so critical, and the aviation operator reason should strengthen slide rail structure inspection and maintenance, but at the actual motion in-process, because slide rail structure inspection is close the difficulty, the damage is hidden, and in the early stage that the damage takes place, hardly by in time inspection discovery. After the damage is further expanded, when the damage is detected and found for the first time, the original state and function of the damage cannot be restored through simple maintenance, and complex structure repair is required to be carried out on the damage, and even the airworthiness requirement can be met. The cost for replacing the damaged slide rail is high, the size of the replaced slide rail can be ensured to be accurate by means of a special positioning tool fixture, interference, abrasion and even blocking do not occur in the operation process of the slide rail, the operation is smooth, and secondary damage is not caused to the structure.
Because the OEM (manufacturer for designing and manufacturing the aircraft engine nacelle) technology is blocked, all engine nacelle tooling frames such as a reverse thrust C duct and the like are not sold, when the slide rail is greatly damaged, the slide rail must be sent back to the original factory for repair or replacement (the price is very high due to almost monopolizing the market), the repair and replacement proportion and cost of the slide rail repair and replacement are analyzed by inquiring the repair and delivery record of the reverse thrust C duct of a company in recent years, and high repair and delivery cost is caused for the company.
Disclosure of Invention
The invention aims to provide a method for replacing a V2500 engine reverse thrust C duct sliding rail structure, which can realize the accurate replacement of the V2500 engine reverse thrust C duct sliding rail structure by designing a fixture and additionally arranging an adjustable articulated arm and a fixture positioning guide rail on the fixture.
The above object of the present invention can be achieved by the following technical solutions: a method for replacing a reverse thrust C duct sliding rail structure of a V2500 engine comprises the following steps:
(S1) acquiring a complete set of digital analogy of the reverse-thrust C duct of the V2500 engine through reverse engineering to obtain the structural size of the reverse-thrust C duct;
(S2) manufacturing a frame according to the structural size of the reverse C duct;
(S3) performing actual verification on the jig;
(S4) manufacturing a joint arm, wherein the joint arm is arranged below the fixture, and a fixture positioning guide rail is also arranged below the joint arm;
(S5) positioning the position of the old reverse-thrust C duct sliding rail structure through the section frame, the joint arm and the section frame positioning guide rail, then dismantling the old reverse-thrust C duct sliding rail structure, installing a new reverse-thrust C duct sliding rail structure in situ, and finally removing the section frame, the joint arm and the section frame positioning guide rail to realize the replacement of the reverse-thrust C duct sliding rail structure of the V2500 engine.
In the method for replacing the reverse thrust C duct slide rail structure of the V2500 engine:
the upper and lower side sliding rails of the reverse thrust C duct are theoretically two absolute parallel lines, and in the manufacturing process, the fixture has the function of ensuring that the sliding rails on the two sides are parallel, so that interference and jamming are avoided and abrasion is avoided in the actuating process. Therefore, preferably, in the step (S2), only by mapping the obtained digifax, a set of mechanisms that can ensure absolute parallelism, fixed distance and relative angle between the replaced slide rail (new slide rail structure) and the original slide rail (old slide rail structure) and that the jig itself has good rigidity and does not deform or become unstable is designed and manufactured in a three-dimensional space.
In the step (S3), the model frame is actually verified, and it is found that the data measured by the model is very accurate after fitting, and the design concept of the model frame is that the model frame is fully positioned by the guide groove, and the OEM has a tolerance range in the manufacturing process, and the slide rail structure itself has a certain wear in the service process. When the fixture is used in practice, due to the fact that the rigidity is too large and errors are accumulated, the fixture is difficult to be smoothly installed on a C duct for positioning, and limitation is large.
This application is through experimental discovery, through technological improvement, gives the type frame and adds articulated arm, carries out the location verification earlier, fixes a position the slide rail structure that newly trades again after through, through the scale on the articulated arm, can perfect location slide rail position, and the tolerance is little, and the size is accurate.
Preferably, in the step (S3), the articulated arm includes a first connecting seat and a second connecting seat hinged to each other, the first connecting seat is disposed on a positioning rail of the jig, a guide groove is disposed on the jig, the second connecting seat is slidably disposed in the guide groove of the jig, and a scale is disposed on the guide groove.
Further, the articulated arm further comprises a spindle, and the first connecting seat and the second connecting seat are hinged to each other through the spindle.
Further, first connecting seat includes first connecting body and sleeve, first connecting body with type frame positioning guide fixed connection, the second connecting seat includes second connecting body and slider, wherein be equipped with the through-hole on the second connecting body, the one end of mandrel is run through the through-hole with the sleeve locks through first retaining member, the slider sets up in the guide way and through the locking of second retaining member.
Furthermore, a gasket is arranged between the second locking piece and the guide groove.
Preferably, the axial direction of the spindle and the sliding direction of the sliding block in the guide groove are perpendicular to each other.
In a preferred embodiment of the present invention, the first locking member is a wing nut, and the second locking member is a socket head set screw.
Preferably, the first connecting body may be fixedly connected to the thrust-reversing C duct slide rail by a screw.
Preferably, in the step (S5), the positions of the new and old reverse C duct slide rail structures are located by the scales on the guide grooves.
Compared with the prior art, the invention has the following advantages:
(1) the fixture, the joint arm and the fixture positioning guide rail have simple and light structures, are convenient to adjust, can save a large amount of installation and debugging time compared with a complete set of tools of an OEM (original equipment manufacturer), and are verified to be accurate in size after being used for multiple times, smooth to operate and free of secondary damage;
(2) the technical blockade of international OEM manufacturers is broken, the self-design and processing of the slide rail positioning type frame are realized, the technical bottleneck restricting the slide rail replacement work is broken through, and the real V2500 nacelle renovation full capability is realized;
(3) considerable outgoing maintenance cost is saved for enterprises.
Drawings
FIG. 1 is a schematic view showing the mounting of the jig, the articulated arm, and the jig positioning rail in example 1 without the first locking member, the second locking member, and the spacer;
FIG. 2 is a front view of FIG. 1 with the first retaining member, the second retaining member and the spacer installed, wherein A is an articulating arm;
FIG. 3 is an enlarged view of A in FIG. 2;
FIG. 4 is a cross-sectional view of A in FIG. 3;
wherein the labels in the figure are:
1 is a jig;
11 is a guide groove;
2 is a joint arm;
21 is a first connecting seat;
211 is a first connection body;
212 is a sleeve;
213 is a first locking member;
214 is a screw;
22 is a second connecting seat;
221 is a second connecting body;
222 is a slide block;
223 is a through hole;
224 is a second locking member;
225 is a gasket;
23 is a mandrel;
and 3, a fixture positioning guide rail.
Detailed Description
Example 1
The method for replacing the reverse thrust C duct slide rail of the V2500 engine provided by the embodiment comprises the following steps of:
(S1) acquiring a complete set of digital analogy of the reverse-thrust C duct of the V2500 engine through reverse engineering to obtain the key structural size of the reverse-thrust C duct;
a Geomagic three-dimensional design software is used for modeling the C duct to obtain a complete set of digital-analog of the V2500 engine reverse-thrust C duct.
(S2) manufacturing the fixture 1 according to the structural size of the reverse C duct;
analysis shows that the upper and lower side sliding rails of the reverse C duct are theoretically two absolute parallel lines, and in the manufacturing process, the fixture has the function of ensuring that the sliding rails on the two sides are parallel, so that interference and jamming are avoided and abrasion is avoided in the actuating process. Therefore, according to the structural size obtained by surveying and mapping, a set of the fixture which can ensure absolute parallelism, fixed distance and fixed relative angle between the replacement slide rail (new slide rail structure) and the original slide rail (old slide rail structure) and has good rigidity and no deformation instability is manufactured in a three-dimensional space, and the structural design of the fixture is carried out by using the CATIA.
(S3) performing actual verification of the jig 1;
in the practical verification process, the applicant finds that the data measured by the digital-analog model are very accurate after fitting, the design concept of the fixture is that the positioning is fully realized by means of the guide groove of the fixture, an OEM (original manufacturer equipment manufacturer) has a tolerance range in the manufacturing process, and the slide rail structure generates certain abrasion in the service process. When the fixture is used in practice, due to the fact that the rigidity is too large and errors are accumulated, the fixture is difficult to be smoothly installed on a C duct for positioning, and limitation is large.
Through technical improvement, the applicant adds the articulated arm to the forming frame, firstly carries out positioning verification, then positions the newly replaced slide rail structure, and can perfectly position the slide rail through the graduated scale on the articulated arm, so that the tolerance is small, and the size is accurate.
(S4) manufacturing a joint arm 2, wherein the joint arm 2 is arranged below the fixture 1, and a fixture positioning guide rail 3 is also arranged below the joint arm 2;
as shown in fig. 1-4, the articulated arm 2 includes a first connecting seat 21 and a second connecting seat 22 hinged to each other, the first connecting seat 21 is disposed on the fixture positioning rail 3, the fixture 1 is provided with a guiding groove 11, the second connecting seat 22 is slidably disposed in the guiding groove 11 of the fixture 1, and the guiding groove 11 is provided with a scale.
The articulated arm 2 further comprises a spindle 23, the first connecting seat 21 and the second connecting seat 22 being mutually articulated by means of the spindle 23.
The first connection seat 21 includes a first connection body 211 and a sleeve 212, the first connection body 211 is fixedly connected with the jig positioning rail 3, the second connection seat 22 includes a second connection body 221 and a sliding block 222, wherein the second connection body 221 is provided with a through hole 223, one end of the mandrel 23 penetrates through the through hole 223 and the sleeve 212 and is locked by a first locking member 213, and the sliding block 222 is disposed in the guide groove 11 and is locked by a second locking member 224.
A spacer 225 is further provided between the second locker 224 and the guide groove 11.
The axial direction of the spindle 23 is perpendicular to the sliding direction of the slider 222 in the guide groove 11, which is only a preferred embodiment and is not limited.
In this embodiment, the first locking member 213 is a wing nut, and the second locking member 224 is a socket head cap screw, which is merely exemplary and not limiting.
The first connecting body 211 can be fixedly connected to the fixture positioning rail 3 by means of screws 214 (which are only exemplary and not limiting herein).
(S5) positioning the position of the old reverse-thrust C duct sliding rail structure through the section frame 1, the joint arm 2 and the section frame positioning guide rail 3, then dismantling the old reverse-thrust C duct sliding rail structure, installing a new reverse-thrust C duct sliding rail structure in situ, and finally removing the section frame 1, the joint arm 2 and the section frame positioning guide rail 3 to realize the replacement of the reverse-thrust C duct sliding rail structure of the V2500 engine.
Specifically, the positions of the new and old reverse thrust C duct sliding rail structures are accurately positioned through the graduated scale on the guide groove 11.
In actual use, the first step is as follows: unscrewing the first locking piece 213 on the articulated arm 2, enabling the fixture positioning guide rail 3 to freely move at an angle and a position, placing the fixture 1 on the c-channel, and screwing the first locking piece 213 on the articulated arm 2 after adjusting the position, wherein the fixture 1 is fixed at the moment; the second step is that: disassembling the old slide rail structure; the third step: replacing a new slide rail structure; the fourth step: a new slide rail structure is positioned by adopting a fixture 1.
Therefore, through technical improvement, the invention adds the joint arm 2 to the fixture 1, firstly unscrews the first locking piece 213 on the joint arm 2, the fixture positioning guide rail 3 can freely move the angle and position, puts the fixture 1 on the back-push c channel, after adjusting the position, screws the first locking piece 213 on the joint arm 2, fixes the fixture 1 at the moment, fixes the fixture positioning guide rail 3, firstly performs positioning verification at the moment, removes the old slide rail structure after passing, then positions the new slide rail structure, positions the new slide rail structure according to the position of the fixture positioning guide rail 3 at the fixed position, and can perfectly position the new slide rail structure through the graduated scale on the joint arm 2, and has small tolerance and accurate size.
The present invention is illustrated by the following examples, which are not intended to limit the scope of the invention. Other insubstantial modifications and adaptations of the present invention can be made without departing from the scope of the present invention.
Claims (10)
1. A method for replacing a reverse thrust C duct sliding rail structure of a V2500 engine is characterized by comprising the following steps of:
(S1) acquiring a complete set of digital analogy of the reverse-thrust C duct of the V2500 engine through reverse engineering to obtain the structural size of the reverse-thrust C duct;
(S2) manufacturing a fixture (1) according to the structural size of the reverse C duct;
(S3) performing actual verification of the jig (1);
(S4) manufacturing a joint arm (2), wherein the joint arm (2) is arranged below the fixture (1), and a fixture positioning guide rail (3) is also arranged below the joint arm (2);
(S5) the position of the old reverse-thrust C duct sliding rail structure is located through the section frame (1), the joint arm (2) and the section frame locating guide rail (3), then the old reverse-thrust C duct sliding rail structure is dismantled, a new reverse-thrust C duct sliding rail structure is installed in situ, and finally the section frame (1), the joint arm (2) and the section frame locating guide rail (3) are removed, so that the replacement of the reverse-thrust C duct sliding rail structure of the V2500 engine is realized.
2. The method for replacing the reverse thrust C duct sliding rail structure of the V2500 engine, which is characterized in that: in the step (S4), the articulated arm (2) comprises a first connecting seat (21) and a second connecting seat (22) which are hinged to each other, the first connecting seat (21) is arranged on a fixture positioning guide rail (3), a guide groove (11) is formed in a fixture (1), the second connecting seat (22) is arranged in the guide groove (11) of the fixture (1) in a sliding mode, and a graduated scale is arranged on the guide groove (11).
3. The method for replacing the reverse thrust C duct sliding rail structure of the V2500 engine, which is characterized in that: the articulated arm (2) further comprises a spindle (23), the first connecting seat (21) and the second connecting seat (22) being articulated to each other by means of the spindle (23).
4. The method for replacing the reverse thrust C duct sliding rail structure of the V2500 engine, which is characterized in that: first connecting seat (21) include first connecting body (211) and sleeve (212), first connecting body (211) with type frame location guide rail (3) fixed connection, second connecting seat (22) include second connecting body (221) and slider (222), wherein be equipped with through-hole (223) on second connecting body (221), the one end of mandrel (23) is run through-hole (223) with sleeve (212) and lock through first retaining member (213), slider (222) set up in guide way (11) and through second retaining member (224) locking.
5. The method for replacing the reverse thrust C duct sliding rail structure of the V2500 engine, which is characterized in that: a spacer (225) is arranged between the second locking member (224) and the guide groove (11).
6. The method for replacing the reverse thrust C duct sliding rail structure of the V2500 engine, which is characterized in that: the axial direction of the mandrel (23) is perpendicular to the sliding direction of the sliding block (222) in the guide groove (11).
7. The method for replacing the reverse thrust C duct slide rail structure of the V2500 engine according to any one of claims 2-6, wherein the method comprises the following steps: the first locking piece (213) is a butterfly nut, and the second locking piece (224) is an inner hexagonal settlement screw.
8. The method for replacing the reverse thrust C duct slide rail structure of the V2500 engine, which is characterized in that: the first connecting body (211) is fixedly connected with the jig positioning guide rail (3) through a screw (214).
9. The method for replacing the reverse thrust C duct slide rail structure of the V2500 engine by using the positioning fixture as claimed in claim 8, wherein the method comprises the following steps: in the step (S5), the positions of the back-thrust C duct slide rail structures before and after replacement are accurately positioned through the graduated scale on the guide groove (11).
10. The method for replacing the reverse thrust C duct sliding rail structure of the V2500 engine, which is characterized in that: in the step (S2), the fixture (1) can ensure that the new reverse-thrust C duct slide rail structure and the old reverse-thrust C duct slide rail structure are absolutely parallel in a three-dimensional space, the distance and the relative angle are fixed, and the fixture has good rigidity and does not deform or become unstable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010392317.XA CN111703586B (en) | 2020-05-11 | 2020-05-11 | Replacement method of reverse-pushing C duct sliding rail structure of V2500 engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010392317.XA CN111703586B (en) | 2020-05-11 | 2020-05-11 | Replacement method of reverse-pushing C duct sliding rail structure of V2500 engine |
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| Publication Number | Publication Date |
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| CN111703586A true CN111703586A (en) | 2020-09-25 |
| CN111703586B CN111703586B (en) | 2023-05-30 |
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| CN202010392317.XA Active CN111703586B (en) | 2020-05-11 | 2020-05-11 | Replacement method of reverse-pushing C duct sliding rail structure of V2500 engine |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040159091A1 (en) * | 2003-02-17 | 2004-08-19 | Joe Sternberger | Apparatus and method for mounting a cascade support ring to a thrust reverser |
| US20110318173A1 (en) * | 2010-06-23 | 2011-12-29 | Rohr, Inc. | Guide system for nacelle assembly |
| CN103192330A (en) * | 2013-03-25 | 2013-07-10 | 广州飞机维修工程有限公司 | Maintaining clamp for jet braking C duct of civil aviation passenger plane |
| CN105263804A (en) * | 2013-05-06 | 2016-01-20 | 萨基姆防务安全公司 | Device for controlling the power of an engine and of a thrust reverser device |
| WO2020049258A1 (en) * | 2018-09-07 | 2020-03-12 | Safran Nacelles | Thrust reverser with movable structure in a c-shape for an aircraft propulsion assembly, and related maintenance method |
-
2020
- 2020-05-11 CN CN202010392317.XA patent/CN111703586B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040159091A1 (en) * | 2003-02-17 | 2004-08-19 | Joe Sternberger | Apparatus and method for mounting a cascade support ring to a thrust reverser |
| US20110318173A1 (en) * | 2010-06-23 | 2011-12-29 | Rohr, Inc. | Guide system for nacelle assembly |
| CN103192330A (en) * | 2013-03-25 | 2013-07-10 | 广州飞机维修工程有限公司 | Maintaining clamp for jet braking C duct of civil aviation passenger plane |
| CN105263804A (en) * | 2013-05-06 | 2016-01-20 | 萨基姆防务安全公司 | Device for controlling the power of an engine and of a thrust reverser device |
| WO2020049258A1 (en) * | 2018-09-07 | 2020-03-12 | Safran Nacelles | Thrust reverser with movable structure in a c-shape for an aircraft propulsion assembly, and related maintenance method |
Non-Patent Citations (1)
| Title |
|---|
| 张小波等: "V2500发动机反推格栅典型损伤修理技术研究", 《航空维修与工程》 * |
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