Quick mounting structure of exhaust nozzle

Abstract

The invention discloses a quick mounting structure for an exhaust nozzle. The quick mounting structure comprises a reinforcing part, a rotating mechanism, a clamping mechanism, a locking plate, an inserting rod, a mounting box and a locking bolt, the reinforcing piece is fixed to the lower end of the combustion chamber, and the clamping mechanism is arranged between the reinforcing piece and the combustion chamber and can lock the exhaust nozzle and the reinforcing piece in the radial direction. The rotating mechanism is connected between the locking plate and the clamping mechanism and used for driving the clamping mechanism to rotate. The locking plate is arranged on the outer side of the exhaust nozzle, a plurality of mounting boxes are evenly fixed to the inner wall of the exhaust nozzle in the circumferential direction, a plurality of mounting grooves are evenly formed in the outer wall of the reinforcing part in the circumferential direction, and the mounting boxes and the mounting grooves are matched to axially limit the exhaust nozzle; inserting rods are fixedly connected to the locking plates, inserting grooves are formed in the inner walls of the mounting grooves, and when the locking plates are pressed, the inserting rods enter the inserting grooves to circumferentially limit the exhaust nozzle; a locking bolt is arranged on the locking plate, a threaded hole is formed in the outer wall of the exhaust nozzle, and the locking plate is fixed after the locking bolt is screwed into the threaded hole. The structure is convenient to install.

Description

Technical Field

[0001] The invention belongs to the field of tail nozzle fixing structures, in particular to a tail nozzle quick-assembly structure. Background Art

[0002] The tail nozzle is one of the components of the turbojet engine of a jet aircraft. Its main function is to eject the products of jet aircraft fuel combustion, such as carbon dioxide, sulfur dioxide, carbon monoxide, nitrogen oxides, and incompletely burned small molecular hydrocarbons, thereby exhausting exhaust gas. It also uses the reaction force generated by the air during injection to propel the aircraft.

[0003] The existing tail nozzle generally has a trumpet-shaped structure installed at the output port as the nozzle expansion section. However, since the impact force of the exhaust gas ejected from the tail nozzle is very strong, the existing installation structure needs to be repeatedly reinforced before each flight after each flight due to the impact during the flight and the bumps and shakes that occur during the altitude change during the flight. The fixing method is relatively cumbersome, and several bolts need to be repeatedly tightened and the threads on the bolts need to be checked for damage, which increases the workload of pre-flight preparations.

[0004] Therefore, a tail nozzle fixing structure that is convenient to fix and firmly fixed is needed. Summary of the invention

[0005] The object of the present invention is to provide a tail nozzle quick-install structure to reduce the workload of each maintenance.

[0006] The technical solution to achieve the purpose of the present invention is:

[0007] A tail nozzle quick-installation structure, comprising a reinforcement piece, a rotating mechanism, a clamping mechanism, a locking plate, a plug rod, a mounting box and a locking bolt;

[0008] The reinforcement is fixed at the lower end of the combustion chamber, and the engaging mechanism is arranged between the reinforcement and the combustion chamber, and can be rotated to lock the tail nozzle and the reinforcement in the radial direction;

[0009] The rotating mechanism is connected between the locking plate and the engaging mechanism, and is used to drive the engaging mechanism to rotate when the locking plate is pressed;

[0010] The locking plate is arranged on the outside of the tail nozzle and can fit with the outer wall of the tail nozzle;

[0011] A plurality of mounting boxes are evenly fixed on the inner wall of the tail nozzle along the circumferential direction, and a plurality of mounting grooves are evenly arranged on the outer wall of the reinforcement member along the circumferential direction, and the mounting boxes cooperate with the mounting grooves to limit the axial position of the tail nozzle;

[0012] The locking plates are all fixedly connected with plug rods, and the inner walls of the mounting grooves are all provided with slots. When the locking plates are pressed, the plug rods enter the slots to limit the tail nozzle circumferentially.

[0013] The locking plate is provided with a locking bolt, and the outer wall of the tail nozzle is provided with a threaded hole. The locking bolt is screwed into the threaded hole to fix the locking plate.

[0014] Compared with the prior art, the present invention has the following significant advantages:

[0015] The present invention reduces the number of locking bolts, utilizes a hinge structure to allow the arc-shaped sliding rod to extend into the arc-shaped groove to form lateral positioning, utilizes an insert rod to be inserted into the slot and a positioning rod to be inserted into the positioning hole to form longitudinal positioning, and then utilizes an F-shaped baffle to ensure that the reinforcement piece and the tail nozzle are always kept in close connection, thereby achieving multi-directional reinforcement and ensuring the stability of the tail nozzle. At the same time, the locking bolts are clamped by a hoop and the engagement formed by the top block and the connecting block ensures the stability of the locking bolts and avoids loosening due to vibration and jolt. This greatly improves the overall stability, is simple and convenient to install, and reduces the workload of the crew for each maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 The structure of the present invention Figure 1 A is an enlarged schematic diagram;

[0018] Figure 3 The structure of the present invention Figure 1 A magnified schematic diagram of B;

[0019] Figure 4 The structure of the present invention Figure 1 A magnified schematic diagram of middle C;

[0020] Figure 5 The structure of the present invention Figure 1 Top view of the assembly relationship between the middle guard bar and the support plate.

[0021] Figure 6 It is a top view of the structure of the tail nozzle quick assembly mechanism of the present invention;

[0022] Figure 7 The top view structure of the present invention Figure 6 An enlarged schematic diagram of D in FIG.

[0023] Figure 8 The structure of the present invention Figure 1 Top view of the lever in FIG.

[0024] Fig. 9 The structure of the present invention Figure 1 Parts drawing of the stopper in .

[0025] In the figure: turbine 1, combustion chamber 2, tail nozzle 3, reinforcement 4, support plate 5, dovetail groove 6, dovetail block 7, tension spring 8, block 9, block rod 10, stabilizing frame 11, twist groove 12, twist rod 13, locking plate 14, plug rod 15, slot 16, installation slot 17, installation box 18, locking bolt 19, threaded hole 20, limit slot 21, placement slot 22, top block 23, compression spring 24, extrusion block 25, extrusion slot 26, guide rod 27, clamping slot 28, hoop 29, sliding block 30, connecting block 31, fixing rod 32, arc plate 33, cross bar 34, positioning rod 35, positioning hole 36, first hinge block 37, hinge rod 38, second hinge block 39, arc groove 40, arc sliding rod 41. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9As shown, a tail nozzle structure includes a turbine 1, a combustion chamber 2 and a tail nozzle 3, wherein the turbine 1 is installed in the combustion chamber 2, the tail nozzle 3 is fixed at the output end of the combustion chamber 2, a reinforcement member 4 is fixedly installed at the lower end of the combustion chamber 2, the reinforcement member 4 is in a ring shape, and the lower end of the reinforcement member 4 is fixedly connected to multiple groups of support plates 5, each group of support plates 5 is two, and the lower end of the reinforcement member 4 is evenly provided with multiple groups of dovetail grooves 6 in the circumferential direction, each group of dovetail grooves 6 is two, and the radial direction of the tail nozzle 3 is axially ... Arrangement, each dovetail groove 6 is arranged on the inner side of the corresponding support plate 5, each dovetail groove 6 is slidably connected with a dovetail block 7, each dovetail groove 6 is connected with a tension spring 8, the movable end of the tension spring 8 is connected to the dovetail block 7, each dovetail block 7 is fixedly connected with a stopper 9 at the lower end, the bottom end of the stopper 9 is in an arc shape, and a slidably connected stopper rod 10 is inserted into each group of support plates 5, the stopper rod 10 is F-shaped, and the stopper rod 10 includes a transverse rod parallel to the twisted rod 13 and A longitudinal rod vertically connected to the two transverse rods, each longitudinal rod corresponding to a stopper 9, one end of the stopper rod 10 is provided with a twist groove 12, a twist rod 13 is connected in the twist groove 12, one end of the twist rod 13 passes through the tail nozzle 3 and is slidably connected thereto, and the other end of the twist rod 13 is fixedly connected with a locking plate 14, which is an arc-shaped plate that can fit with the outer wall of the tail nozzle 3. During the initial installation, the tail nozzle 3 is covered on the reinforcement 4, and then the locking plate is pushed inward. 14, which causes the twisted rod 13 to move accordingly. When the twisted rod 13 moves inward, it extends into the twisted groove 13, which causes the blocking rod 10 to deflect, thereby causing the blocking rod 10 to rotate ninety degrees. In this way, the blocking block 9 is squeezed by the blocking rod 10 (longitudinal rod) away from the direction of the turbine 1, and then the tension spring 8 is stretched, and the blocking block 9 is squeezed between the blocking rod 10 and the support plate 5, so that the tail nozzle 3 and the reinforcement 4 can be locked in the radial direction.

[0028] The baffle rod 10 is provided with a plurality of rotationally connected stabilizing frames 11, one end of each of which is fixedly connected to the inner bottom surface of the corresponding tail nozzle 3. The stabilizing frames 11 maintain the stability of the baffle rod 10 during rotation and limit the baffle rod 10 axially.

[0029] The inner wall of the tail nozzle 3 is evenly and fixedly installed with a plurality of installation boxes 18 along the circumferential direction, and the outer wall of the reinforcement member 4 is evenly provided with a plurality of installation grooves 17 along the circumferential direction. Each installation box 18 is inserted into the corresponding installation groove 17 and is slidably connected thereto. A plug rod 15 is fixedly connected to each locking plate 14. A slot 16 is provided on the inner wall of each installation groove 17. One end of each plug rod 15 penetrates the installation box 18 and extends into the slot 16. The plug rod 15 is slidably connected with the installation box 18 and the slot 16 along the radial direction. When the tail nozzle 3 is covered on the reinforcement member 4, the installation box 18 also enters the corresponding installation groove 17. When the locking plate 14 is pushed to move, the plug rod 15 also enters the slot 16 to form a secondary fixation.

[0030] The locking plate 14 is provided with a locking bolt 19, and a plurality of threaded holes 20 are evenly arranged on the outer wall of the tail nozzle 3. A limiting groove 21 is arranged on the inner side wall of each threaded hole 20, and a placement groove 22 is arranged on the inner top surface and the inner bottom surface of each limiting groove 21. A top block 23 is slidably connected in the placement groove 22, and a compression spring 24 is arranged in the placement groove 22. The compression spring 24 is respectively connected to the bottom surface of the placement groove 22 and the top block 23. A plurality of groups of extrusion springs are fixedly installed on the outer wall of the tail nozzle 3. There are two extrusion blocks 25 in each group, which are symmetrical about the threaded hole 20. Two extrusion grooves 26 are arranged on the inner side wall of each locking plate 14. The extrusion grooves 26 are arranged opposite to the extrusion blocks 25. A guide rod 27 and a sliding block 30 are arranged in each extrusion groove 26. The sliding direction is the radial direction of the locking bolt 19. Two clamping grooves 28 are arranged on each locking plate 14. A hoop 29 is slidably connected in each clamping groove 28. The hoop 29 is in an arc shape. The guide rod 27 in the pressing groove 26 and one end of the sliding block 30 are fixedly connected to the outer arc wall of the corresponding clamping hoop 29, and one end of the locking bolt 19 is fixedly connected to a connecting block 31, which is ring-shaped and has an H-shaped cross-section. When the locking plate 14 is pushed to a certain distance, the locking bolt 19 is rotated so that the locking bolt 19 enters the threaded hole 20 and is threadedly connected thereto. On the one hand, multiple groups of top blocks 23 are provided. Under the action of the compression spring 24, the top block 23 extends into the outer surface notch of the connecting block 31 to form a snap fit, thereby ensuring the stability of the locking bolt 19. On the other hand, the extrusion block 25 will enter the extrusion groove 26, which will cause the wedge surface of the sliding block 30 to be compressed, thereby causing the sliding block 30 to displace with the guide rod 27. The guide rod 27 plays a guiding role to ensure that the clamping hoop 29 can move stably. In this way, the two clamping hoops 29 are used again to clamp the smooth surface of the root of the locking bolt 19, thereby further ensuring the stability of the locking bolt 19. The top block 23 may be connected to a shifting block, and the top block 23 and the connecting block 31 may be separated by shifting the shifting block.

[0031] The installation box 18 is provided with an arc-shaped plate 33, and two slidingly connected cross bars 34 are inserted into the arc-shaped plate 33. The two ends of the cross bars 34 are respectively fixedly connected to the inner walls of the installation box 18 on both sides to guide the arc-shaped plate 33. A positioning rod 35 is fixedly connected to the inner side of the arc-shaped plate 33. A positioning hole 36 is provided on the inner wall of one side of each installation groove 17. The positioning hole 36 is arranged opposite to the axis of the positioning rod 35. A plurality of first hinge blocks 37 are fixedly installed on the inner arc wall of the arc-shaped plate 33. In this embodiment, four first hinge blocks 37 are provided, two of which are symmetrically arranged on the upper side of the positioning rod 35, and two of which are symmetrically arranged on the lower side of the positioning rod 35. Each first hinge block 37 is hinged to a hinge rod 38 through a hinge pin, and one end of each hinge rod 38 is hinged to a second hinge block 39 through a hinge pin, which is located on the same side of the arc-shaped plate 33 in the circumferential direction. The two second hinge blocks 39 are commonly fixedly connected with a sliding rod 41 at one end, and the sliding rod 41 is T-shaped. An arc groove 40 is provided on the relative inner wall of each mounting groove 17. A fixing rod 32 is fixedly connected to the outer arc wall of each arc plate 33. One end of each fixing rod 32 passes through the tail nozzle 3 and is fixedly connected to the corresponding locking plate 14 side wall respectively. As the locking plate 14 moves, the fixing rod 32 will also move accordingly, thereby driving the arc plate 33 in the installation box 18 to move radially, and the cross bar 34 plays a stabilizing role. In this way, the symmetrically arranged first hinge block 37 is displaced, and the hinge rod 38 is used to drive the second hinge block 39 to also be displaced, so that the sliding rod 41 extends into the arc groove 40, forming multiple positioning and limiting, thereby ensuring the stability of the connection of the tail nozzle 3.

[0032] The freedom restriction of some key mechanisms is explained as follows: the freedom restriction of the nozzle 3 by the combustion chamber 2 includes the axial, circumferential and radial directions of the tail nozzle 3. The double slider mechanism composed of the arc plate 33, the hinge rod 38, the installation box 18 and the arc groove 40 imposes axial freedom restriction on the nozzle. The mechanism composed of the above-mentioned plug rod 15 and the reinforcement 4, the positioning rod 35 and the positioning hole 36 cooperates with the installation box 18 and the installation groove 16 to impose circumferential freedom restriction on the nozzle. The mechanism composed of the above-mentioned support plate 5, the stopper 9, the stopper rod 10 and the stabilizing frame 11 imposes radial freedom restriction on the nozzle. Therefore, through a set of 4 circumferentially arranged bolts, the freedom of the entire nozzle can be fully restricted and fixed, which greatly improves the overall stability, is simple and convenient to install, and reduces the workload of the crew for each maintenance.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A tail nozzle quick-install structure, characterized in that: It includes a reinforcement member, a rotating mechanism, a locking mechanism, a locking plate, a plug rod, a mounting box and a locking bolt; The reinforcement is fixed at the lower end of the combustion chamber, and the engaging mechanism is arranged between the reinforcement and the combustion chamber, and can be rotated to lock the tail nozzle and the reinforcement in the radial direction; The rotating mechanism is connected between the locking plate and the engaging mechanism, and is used to drive the engaging mechanism to rotate when the locking plate is pressed; The locking plate is arranged on the outside of the tail nozzle and can fit with the outer wall of the tail nozzle; A plurality of mounting boxes are evenly fixed on the inner wall of the tail nozzle along the circumferential direction, and a plurality of mounting grooves are evenly arranged on the outer wall of the reinforcement member along the circumferential direction, and the mounting boxes cooperate with the mounting grooves to limit the axial position of the tail nozzle; The locking plates are all fixedly connected with plug rods, and the inner walls of the mounting grooves are all provided with slots. When the locking plates are pressed, the plug rods enter the slots to limit the tail nozzle circumferentially. The locking plate is provided with a locking bolt, and the outer wall of the tail nozzle is provided with a threaded hole. The locking bolt is screwed into the threaded hole to fix the locking plate.

2. The tail nozzle quick assembly structure according to claim 1, characterized in that: The locking mechanism includes a support plate, a dovetail block, a tension spring, a stopper and a stopper rod; the support plate is fixed to the lower end of the reinforcement member, the lower end of the reinforcement member is provided with a dovetail groove, the dovetail groove is located on the inner side of the support plate, a dovetail block is slidably connected in the dovetail groove, a tension spring is connected between the dovetail groove and the dovetail block, and a stopper is fixedly connected to the lower end of the dovetail block; the stopper rod is rotatably connected to the support plate, and can rotate and contact the stopper under the drive of the rotating mechanism, so that the tension spring is stretched by force, so that the stopper is squeezed between the stopper rod and the support plate.

3. The tail nozzle quick assembly structure according to claim 2, characterized in that: The number of the support plate, dovetail block and stopper is two each, and the stopper rod is F-shaped and is provided with two longitudinal rods cooperating with the stopper.

4. The tail nozzle quick assembly structure according to claim 1, characterized in that: The rotating mechanism includes a twisted rod and a stabilizing frame; the locking mechanism is provided with a twisted groove cooperating with the twisted rod, one end of the twisted rod passes through the tail nozzle and cooperates with the twisted groove, and the other end is fixed to the locking plate; the stabilizing frame is fixed to the tail nozzle, and is rotatably connected to the rotating mechanism, and axially limits the rotating mechanism.

5. The tail nozzle quick assembly structure according to claim 1, characterized in that: A limiting groove is provided in the threaded hole, and a placement groove is provided on the top surface and the inner bottom surface of the limiting groove; a top block is slidably connected in the placement groove, and a compression spring is provided between the top block and the top block; a connecting block is provided at the end of the locking bolt, and the connecting block is ring-shaped. After the locking bolt enters the threaded hole, the top block cooperates with the connecting block to lock the locking bolt.

6. The tail nozzle quick assembly structure according to claim 1, characterized in that: Two extrusion blocks are symmetrically fixed on the outer wall of the threaded hole, and two extrusion grooves are arranged on the inner wall of the locking plate, and the extrusion grooves are arranged opposite to the extrusion blocks; a slidably connected guide rod and a sliding block are provided in the extrusion groove, and the sliding direction is the radial direction of the locking bolt; two clamping grooves are provided on the locking plate, and a clamp is slidably connected in each clamping groove to clamp the locking bolt.

7. The tail nozzle quick assembly structure according to claim 1, characterized in that: An arc plate is slidably connected inside the installation box, and the outer side of the arc plate is fixed to the locking plate through a fixing rod; a positioning rod is fixedly connected to the inner side of the arc plate, and a positioning hole cooperating with the positioning rod is provided on the inner wall of the installation groove; a sliding rod is symmetrically hinged on the inner wall of the arc plate, and the sliding rod cooperates with the arc groove provided on the installation groove and can enter the arc groove for limiting.

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