Jet engine nozzle shape righting tool

Abstract

A jet engine nozzle shape righting tool comprises a bottom plate, a fixing block for fixing the rear portion of a jet engine nozzle is arranged on the bottom plate, a main fixing plate is arranged at the front end of the upper portion of the bottom plate, a front shape righting mechanism is arranged in front of the main fixing plate, and the front shape righting mechanism comprises a positioning plate and a movable plate. The positioning plate and the movable plate are arranged at the left end and the right end of the front side of the main mounting hole respectively, the movable plate comprises an extrusion portion arranged on the front side of the main fixing plate, a locking portion is vertically mounted on the side, away from a jet engine nozzle, of the extrusion portion, a screw hole is formed in the locking portion, and a locking bolt is horizontally assembled in the screw hole. An auxiliary fixing plate is arranged on the front side of the front shape correcting mechanism, the main fixing plate and the auxiliary fixing plate are detachably connected through a fastening bolt, and a bolt hole for avoiding the fastening bolt is formed in the extrusion part. Uniform force application to complex geometrical shapes is achieved through the main fixing plate and the front orthopedic mechanism, local excessive extrusion is avoided, a part to be subjected to orthopedic is fully supported, and orthopedic consistency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nozzle straightening technical field, especially relates to straightening frock. BACKGROUND

[0002] The nozzle of jet engine is one of the key components of the engine, and the design and manufacturing precision thereof directly affect the performance of the engine, such as thrust, fuel efficiency, noise, etc. The nozzle is usually made of high-temperature alloy and needs to withstand extreme temperature and pressure. During the manufacturing process, the geometric shape deviation may be caused by thermal deformation or mechanical stress, at which time the design size needs to be restored through the straightening frock.

[0003] The nozzle has the characteristics of thin wall and multiple curvatures, such as convergent-divergent surface, and the straightening effect of complex geometric shape is uneven, the traditional rigid frock is difficult to apply force uniformly, and local excessive extrusion may cause buckling or wrinkling, while the area lacking support is insufficiently corrected, and needs to rely on manual intervention adjustment, which is poor in consistency. SUMMARY

[0004] The utility model aims at providing jet engine nozzle straightening frock to solve the problems existing in the prior art.

[0005] The above technical purpose of the utility model is realized through the following technical scheme:

[0006] The jet engine nozzle straightening frock comprises a bottom plate, a fixing block for fixing the rear part of the nozzle of jet engine is arranged on the bottom plate, a main fixing plate is arranged at the front end of the upper part of the bottom plate;

[0007] The main fixing plate is provided with a main mounting hole for accommodating the front end of the nozzle of jet engine;

[0008] A front straightening mechanism is arranged in front of the main fixing plate;

[0009] The front straightening mechanism comprises a positioning plate and a movable plate;

[0010] The positioning plate and the movable plate are respectively arranged at the left and right ends of the front side of the main mounting hole;

[0011] The movable plate comprises an extrusion part arranged on the front side of the main fixing plate, and a locking part is vertically arranged on the side of the extrusion part away from the nozzle of jet engine;

[0012] A screw hole is arranged on the locking part, and a locking bolt is horizontally assembled in the screw hole;

[0013] The movable plate is adjusted in relative position through the cooperation of the locking bolt and the main fixing plate;

[0014] A secondary fixing plate is arranged on the front side of the front straightening mechanism, and the main fixing plate and the secondary fixing plate are detachably connected through fastening bolts.

[0015] The auxiliary mounting hole on the auxiliary fixed plate accommodates the front end of the front part of the jet engine nozzle;

[0016] The extrusion part is provided with a bolt hole for avoiding the fastening bolt.

[0017] By adopting the above technical scheme, the main mounting hole fixes the rear part of the front part of the nozzle, and the auxiliary mounting hole fixes the front end of the front part, forming an axial constraint system to avoid stress concentration caused by overall rigid clamping. The two are arranged apart from each other, and the front straightening mechanism is located between the main fixed plate and the auxiliary fixed plate. The intermediate position of the positioning plate responsible for extrusion straightening and the movable plate straightening nozzle front part cooperates with the extrusion part of the movable plate to form a progressive force applying mechanism. The operator can control the straightening force by torque to avoid the instantaneous overload caused by traditional hammer straightening. The bolt hole design ensures that the fastening bolt and the straightening mechanism do not interfere with each other. The side of the bolt hole close to the nozzle is open. In order to facilitate the approach from the direction away from the nozzle, the fastening bolt is avoided in this process, realizing the parallel operation of straightening and fixing. At the same time, the bolt hole itself also plays a limiting role. When tightened to the mechanical stop position, the distance between the positioning plate and the extrusion part is not greater than the design width of the jet engine nozzle. Through the mounting holes on the main fixed plate and the auxiliary fixed plate, uniform force is applied to the complex geometric shape, avoiding excessive extrusion in local area, so that the part to be straightened is fully supported without relying on manual adjustment, and the consistency is good.

[0018] In further embodiments, the upper rear end of the bottom plate is vertically provided with a support plate;

[0019] The height of the support plate is consistent with the height of the main fixed plate;

[0020] The upper end of the support plate and the main fixed plate is provided with an upper mounting plate;

[0021] The upper mounting plate is provided with an upper mounting hole corresponding to the small end of the jet engine nozzle;

[0022] An upper straightening mechanism is assembled in the upper mounting hole.

[0023] By adopting the above technical scheme, the support plate and the main fixed plate form a stable frame structure, the upper mounting plate connects the support plate and the main fixed plate to enhance the overall rigidity, the upper mounting hole corresponds to the small end of the nozzle, so that the upper straightening mechanism can accurately apply the straightening force, avoiding the axial deviation of the nozzle during the straightening process. The setting of the upper mounting plate enables the straightening tool to simultaneously constrain and straighten the large end and the small end of the nozzle, improving the comprehensiveness and precision of straightening.

[0024] In further embodiments, the upper straightening mechanism includes a tightening part and a pressing part;

[0025] A gasket is coaxially arranged above the upper mounting hole, and a tightening portion is arranged above the gasket;

[0026] The tightening portion and the pressing portion are fixedly connected through a bolt;

[0027] A slope corresponding to the small end of the jet engine nozzle is arranged below the pressing portion.

[0028] By adopting the above technical solution, the gasket disperses the pressure of the tightening portion, avoiding local stress damage to the nozzle surface. The tightening portion is connected to the pressing portion through a bolt, forming an adjustable pressing force. The design of the slope makes the contact between the pressing portion and the small end of the nozzle more conformable, and applies uniform radial force, avoiding deformation or scratches caused by point contact. At the same time, different tightening portions are replaced, and the slope can adapt to the small end of the nozzle at different angles, improving the versatility of the tooling.

[0029] In further embodiments, the positioning plate is an L-shaped plate, and the top of the L-shaped plate supports the upper mounting plate.

[0030] The inner bent side of the L-shaped plate cooperates with the extrusion portion to press the jet engine nozzle.

[0031] By adopting the above technical solution, the top of the L-shaped plate supports the upper mounting plate, enhancing the stability of the upper mounting plate and avoiding shaking of the upper mounting plate during the straightening process. The inner bent side of the L-shaped plate cooperates with the extrusion portion to form a clamping space, which can simultaneously straighten the lateral and radial directions of the nozzle, improving the efficiency and effect of straightening. The L-shaped structure also facilitates installation and disassembly, simplifying the operation process.

[0032] In further embodiments, the rear side of the main fixed plate is provided with a supporting mechanism.

[0033] By adopting the above technical solution, the supporting mechanism can assist in supporting the rear part of the nozzle, avoiding drooping or deviation of the nozzle during the straightening process. The supporting mechanism cooperates with the main fixed plate to form a multi-point support system, further improving the stability and precision of straightening. At the same time, the supporting mechanism can be adjusted according to different models of nozzles, enhancing the adaptability of the tooling.

[0034] In further embodiments, the hole diameter of the main mounting hole is larger than the hole diameter of the auxiliary mounting hole.

[0035] By adopting the technical scheme, the different hole diameters of the main mounting hole and the auxiliary mounting hole can adapt to the gradually changing diameter of the front part of the nozzle, the larger hole diameter of the main mounting hole facilitates the preliminary positioning and installation of the nozzle, and the smaller hole diameter of the auxiliary mounting hole provides more accurate fixing, so that the axial sliding of the nozzle during the straightening process is avoided, the segmented hole diameter design makes the straightening force distribution more reasonable, and the local stress that is too large to cause the deformation of the nozzle is avoided.

[0036] In summary, the utility model has the following beneficial effects:

[0037] 1. By the setting of the main fixing plate, the auxiliary fixing plate and the front straightening mechanism, the segmented fixing and the progressive straightening effect can be achieved, the main mounting hole of the main fixing plate and the auxiliary mounting hole of the auxiliary fixing plate form an axial constraint system, stress concentration caused by overall rigid clamping is avoided, meanwhile, the positioning plate and the movable plate of the front straightening mechanism cooperate with the locking bolt, controllable straightening force application is realized, the nozzle is prevented from being damaged by instantaneous overload, the bolt hole design ensures that the fastening bolt and the straightening mechanism do not interfere with each other, operation convenience is improved, meanwhile, as a limiting groove, the straightening precision is ensured, and excessive extrusion is avoided.

[0038] 2. By the setting of the support plate, the upper mounting plate and the upper straightening mechanism, the multidirectional stable support and the precise straightening effect can be achieved, the support plate and the main fixing plate form a rigid frame, the overall stability is enhanced, the upper mounting plate connects the support plate and the main fixing plate, the axial deviation of the nozzle during the straightening process is ensured, the tightening part, the pressing part and the inclined surface design of the upper straightening mechanism make the small end of the nozzle bear force uniformly, local stress that is too large is avoided, meanwhile, the nozzle structure of different angles is adapted to, the universality and the straightening precision of the tooling are improved.

[0039] 3. By the setting of the L-shaped positioning plate, the multidirectional collaborative support and the self-adaptive adjustment effect can be achieved, the L-shaped positioning plate supports the upper mounting plate and cooperates with the extrusion part to form a clamping space, the straightening efficiency is improved, meanwhile, the L-shaped positioning plate is convenient to disassemble and assemble, the supporting mechanism provides auxiliary support, the nozzle is prevented from drooping under stress, the straightening stability is enhanced, the differential hole diameter design of the main mounting hole and the auxiliary mounting hole adapts to the gradually changing diameter of the nozzle, the straightening force distribution is ensured to be reasonable, local deformation is avoided, and the straightening quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is the overall schematic view in the utility model;

[0041] Figure 2 is the structural schematic view for reflecting the front straightening mechanism in the utility model;

[0042] Figure 3 is the schematic view for reflecting the upper straightening mechanism in the utility model.

[0043] In the diagram, 1 is the base plate; 2 is the fixing block; 3 is the main fixing plate; 4 is the front straightening mechanism; 41 is the positioning plate; 42 is the movable plate; 421 is the squeezing part; 422 is the locking part; 5 is the secondary fixing plate; 6 is the support plate; 7 is the upper mounting plate; 8 is the upper straightening mechanism; 81 is the tightening part; 82 is the pressing part; and 9 is the supporting mechanism. Detailed Implementation

[0044] The present invention will be further described in detail below with reference to the accompanying drawings.

[0045] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0046] like Figure 1 - Figure 3 As shown, the jet engine nozzle straightening fixture includes a base plate 1, on which a fixing block 2 for fixing the rear of the jet engine nozzle is provided. A main fixing plate 3 is provided at the upper front end of the base plate 1. The main fixing plate 3 has a main mounting hole for accommodating the front and rear ends of the jet engine nozzle. A front straightening mechanism 4 is provided in front of the main fixing plate 3. The front straightening mechanism 4 includes a positioning plate 41 and a movable plate 42. The positioning plate 41 and the movable plate 42 are respectively located at the left and right ends in front of the main mounting hole. The movable plate 42 includes a pressing part 42 located in front of the main fixing plate 3. 1. A locking part 422 is vertically installed on the side of the extrusion part 421 away from the jet engine nozzle. A screw hole is provided on the locking part 422, and a locking bolt is horizontally installed in the screw hole. The movable plate 42 can adjust its relative position by cooperating with the main fixed plate 3 through the locking bolt. A secondary fixed plate 5 is provided on the front side of the front straightening mechanism 4, and the main fixed plate 3 and the secondary fixed plate 5 are detachably connected by fastening bolts. The secondary fixed plate 5 has a secondary mounting hole for accommodating the front end of the jet engine nozzle. A bolt hole for avoiding the fastening bolt is provided on the extrusion part 421.

[0047] By adopting the technical scheme, the front part of the nozzle is fixed by the main mounting hole of the main fixed plate 3, and the front end of the front part is fixed by the auxiliary mounting hole, an axial constraint system is formed, stress concentration caused by overall rigid clamping is avoided, the front straightening mechanism 4 is arranged between the main fixed plate and the auxiliary fixed plate, the positioning plate 41 and the movable plate 42 for extrusion straightening are arranged at the middle position of the front part of the straightening nozzle, the extrusion part 421 of the movable plate 42 is locked by the locking bolt to form a progressive force applying mechanism, the operator can control the straightening force by torque, instantaneous overload caused by traditional hammering straightening is avoided, the bolt hole is designed to ensure that the fastening bolt and the straightening mechanism do not interfere with each other, the side of the bolt hole close to the nozzle is open, in order to facilitate the approach from the direction away from the nozzle, the fastening bolt is avoided in this process, parallel operation of straightening and fixing is realized, and the bolt hole itself also plays a limiting role, when the bolt is tightened to the mechanical stop position, the distance between the positioning plate 41 and the extrusion part 421 is not greater than the design width of the jet engine nozzle, through the mounting holes on the main fixed plate 3 and the auxiliary fixed plate 5, uniform force is realized on the complex geometric shape, local excessive extrusion is avoided, the part to be straightened is fully supported, and manual intervention adjustment is not needed, and good consistency is achieved.

[0048] In further embodiments, the upper rear end of the bottom plate 1 is vertically provided with a support plate 6, the height of the support plate 6 is consistent with the height of the main fixed plate 3, the upper part of the support plate 6 and the main fixed plate 3 is provided with an upper mounting plate 7, and the upper mounting plate 7 is provided with an upper mounting hole corresponding to the small end of the jet engine nozzle, and an upper straightening mechanism 8 is assembled in the upper mounting hole.

[0049] By adopting the technical scheme, the support plate 6 and the main fixed plate 3 form a stable frame structure, the upper mounting plate 7 enhances the overall rigidity by connecting the support plate 6 and the main fixed plate 3, the upper mounting hole corresponds to the small end of the nozzle, so that the upper straightening mechanism 8 can accurately apply the straightening force, and axial deviation of the nozzle during the straightening process is avoided, and the setting of the upper mounting plate 7 enables the straightening tool to simultaneously constrain and straighten the large end and the small end of the nozzle, thereby improving the comprehensiveness and precision of straightening.

[0050] In further embodiments, the upper straightening mechanism 8 comprises a tightening part 81 and a pressing part 82, a gasket is coaxially arranged above the upper mounting hole, the gasket is provided with the tightening part 81 above, the tightening part 81 and the pressing part 82 are fixedly connected by a bolt, and an inclined surface corresponding to the small end of the jet engine nozzle is arranged below the pressing part 82.

[0051] By adopting the technical scheme, the gasket is arranged to disperse the pressure of the tightening part 81, so as to avoid damage to the nozzle surface due to excessive local stress, the tightening part 81 is connected with the pressing part 82 through the bolt, so as to form adjustable pressing force, the design of the inclined surface makes the pressing part 82 more closely contact with the small end of the nozzle, so as to apply uniform radial force and avoid deformation or scratching caused by point contact, and different tightening parts 81 are replaced, the inclined surface can adapt to nozzles with different angles, and the universality of the tooling is improved.

[0052] In a further embodiment, the positioning plate 41 is an L-shaped plate, the top of the L-shaped plate supports the upper mounting plate 7, and the inner bent side of the L-shaped plate cooperates with the extrusion part 421 to press the jet nozzle of the jet engine.

[0053] By adopting the technical scheme, the top of the L-shaped plate supports the upper mounting plate 7, so as to enhance the stability of the upper mounting plate 7 and avoid shaking of the upper mounting plate 7 during the straightening process, the inner bent side of the L-shaped plate cooperates with the extrusion part 421 to form a clamping space, so as to simultaneously straighten the lateral and radial directions of the nozzle, improve the efficiency and effect of straightening, and the L-shaped structure is convenient for installation and disassembly, and simplifies the operation process.

[0054] In a further embodiment, the rear side of the main fixed plate 3 is provided with a supporting mechanism 9.

[0055] By adopting the technical scheme, the supporting mechanism 9 can assist in supporting the rear part of the nozzle, so as to avoid drooping or deviation of the nozzle due to stress during the straightening process, the supporting mechanism 9 cooperates with the main fixed plate 3 to form a multi-point support system, further improving the stability and precision of straightening, and the supporting mechanism 9 can be adjusted according to different models of nozzles, enhancing the adaptability of the tooling.

[0056] In a further embodiment, the main mounting hole has a larger hole diameter than the hole diameter of the auxiliary mounting hole.

[0057] By adopting the technical scheme, the different hole diameters of the main mounting hole and the auxiliary mounting hole can adapt to the gradually changing diameter of the front part of the nozzle, the larger hole diameter of the main mounting hole is convenient for preliminary positioning and installation of the nozzle, and the smaller hole diameter of the auxiliary mounting hole provides more accurate fixing, so as to ensure that the nozzle does not slide axially during the straightening process, and the segmented hole diameter design makes the straightening force distribution more reasonable, avoiding excessive local stress to cause deformation of the nozzle.

[0058] In the embodiments disclosed by the utility model, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connection" can be direct connection, or indirect connection through an intermediate medium.

[0059] The specific embodiments are merely illustrative of the utility model, and are not intended to limit the utility model, and those skilled in the art can make modifications to the embodiments without creative contribution according to the needs after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, they are protected by the patent law.

Claims

1. A jet engine nozzle straightening tool comprising a base plate (1) provided with a fixing block (2) for fixing the rear part of a jet engine nozzle, characterized in that: The upper front end of the bottom plate (1) is provided with a main fixing plate (3); The main fixing plate (3) is provided with a main mounting hole for accommodating the front end of the nozzle of the jet engine; The front side of the main fixing plate (3) is provided with a front straightening mechanism (4); The front straightening mechanism (4) comprises a positioning plate (41) and a movable plate (42); The positioning plate (41) and the movable plate (42) are respectively arranged at the left and right ends of the front side of the main mounting hole; The movable plate (42) comprises a pressing part (421) arranged on the front side of the main fixing plate (3), and a locking part (422) vertically arranged on the side away from the nozzle of the jet engine; The locking part (422) is provided with a threaded hole, and a locking bolt is horizontally arranged in the threaded hole; The movable plate (42) is adjusted in relative position by cooperating with the main fixing plate (3) through the locking bolt; The front side of the front straightening mechanism (4) is provided with a secondary fixing plate (5), and the main fixing plate (3) and the secondary fixing plate (5) are detachably connected through a fastening bolt; The secondary fixing plate (5) is provided with a secondary mounting hole for accommodating the front end of the nozzle of the jet engine; The pressing part (421) is provided with a bolt hole for avoiding the fastening bolt.

2. The jet engine nozzle correction tooling fixture of Claim 1, wherein: The upper rear end of the bottom plate (1) is vertically provided with a support plate (6); The height of the support plate (6) is consistent with the height of the main fixing plate (3); The upper side of the support plate (6) and the main fixing plate (3) is provided with an upper mounting plate (7); The upper mounting plate (7) is provided with an upper mounting hole corresponding to the small end of the nozzle of the jet engine; An upper straightening mechanism (8) is assembled in the upper mounting hole.

3. The jet engine nozzle correction tooling of Claim 2, wherein: The upper straightening mechanism (8) comprises a tightening part (81) and a pressing part (82); A gasket is coaxially arranged above the upper mounting hole, and the upper side of the gasket is provided with the tightening part (81); The tightening part (81) and the pressing part (82) are fixedly connected through a bolt; The lower side of the pressing part (82) is provided with an inclined surface corresponding to the small end of the nozzle of the jet engine.

4. The jet engine nozzle correction tooling fixture of Claim 1, wherein: The positioning plate (41) is an L-shaped plate, and the top of the L-shaped plate supports the upper mounting plate (7); The inner bending side of the L-shaped plate cooperates with the pressing part (421) to press the nozzle of the jet engine.

5. The jet engine nozzle correction tooling fixture of Claim 1, wherein: The rear side of the main fixing plate (3) is provided with a supporting mechanism (9).

6. The jet engine nozzle correction tooling fixture of Claim 1, wherein: The aperture of the main mounting hole is larger than the aperture of the secondary mounting hole.

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