The application discloses a diffusion section dismounting tool suitable for the following rotation of a tail pipe in a full-bullet maintenance process.

Abstract

The application discloses a diffusion section dismounting tool suitable for the tail pipe follow-up phenomenon in the whole elastic maintenance process, which comprises an anchor pulling tool, a hoop tool and an anti-follow-up tool. The anchor pulling tool mainly functions to drive the rudder cabin to move, and in combination with a diffusion section wrench disc, the rudder cabin and the tail nozzle can be alternately moved to the outside. The hoop tool mainly functions to prevent the tail pipe from being damaged due to the contact with the rudder cabin caused by gravity. The anti-follow-up tool mainly functions to limit the axial displacement of the tail pipe and prevent the tail pipe from following up during the dismounting of the diffusion section. The anchor pulling tool comprises a pull rod, a supporting rod, a screw rod, a screw wrench, a diffusion section wrench disc and a screw. The hoop tool comprises a hoop, a modified screw, a connecting bolt, a nut and a felt pad. The anti-follow-up tool comprises a modified shell, an inverted hook, an insert piece, a fixing member, a base and a screw.

Description

TECHNICAL FIELD

[0001] The application relates to a solid rocket engine technology field, in particular to a diffusion section dismounting device for a tail pipe after a tail pipe follow-up phenomenon occurs in a full missile maintenance process. BACKGROUND

[0002] For a small and medium-sized diameter solid rocket engine, a tail pipe front and rear interface generally adopts a threaded connection, a front interface is connected with a combustion chamber, and a rear interface is connected with a diffusion section. According to a full missile maintenance requirement of a type, a tail pipe follow-up phenomenon occurs in a diffusion section replacement process, at this time, if a diffusion section wrench is continuously used to screw the diffusion section in a conventional way, interference between internal parts of a rudder chamber and the tail pipe will be caused, parts are damaged and cannot be normally used, in order to effectively avoid the problem, a diffusion section dismounting device is separately designed for the tail pipe follow-up phenomenon, so that the rudder chamber and the tail nozzle are protected from being damaged, and the diffusion section replacement work is smoothly carried out. SUMMARY

[0003] The application provides a diffusion section dismounting device and a dismounting method using the device for a tail pipe follow-up phenomenon in a full missile maintenance process.

[0004] The technical scheme of the application is as follows: a diffusion section dismounting device suitable for a tail pipe follow-up phenomenon in a full missile maintenance process, comprising: an anchor pulling device, a clamp device and an anti-follow-up device, wherein,

[0005] The clamp device is used for clamping and fixing the rudder chamber, so as to prevent the tail pipe from being damaged due to contact with the rudder chamber under the action of gravity; the clamp device is connected with the anchor pulling device, and under the driving of the anchor pulling device, the rudder chamber moves along, then a diffusion section wrench is used alone to move the tail pipe to the outside, and the rudder chamber and the tail pipe are alternately moved to the outside by alternating use; the anti-follow-up device is used for limiting the axial displacement of the tail pipe, so as to prevent the tail pipe from following up during dismounting of the diffusion section.

[0006] Preferably, the anchor pulling device comprises: a pull rod, a support rod, a screw rod, a screw rod wrench and a diffusion section wrench.

[0007] The two pull rods are a group, one end of each of the two pull rods is connected to the two ends of the support rod, and the other end of each of the two pull rods is provided with an inward hook for cooperation with the clamp device, so that the clamp device moves along; an inner thread is designed in the middle of the support rod for cooperation with an outer thread on the outer surface of the screw rod, a groove is arranged on the upper end of the screw rod for abutting against the diffusion section wrench, and a hole is arranged on the other end of the screw rod for penetrating the screw rod wrench; the diffusion section wrench is used for abutting against the diffusion section to drive the rudder chamber to move along when the anchor pulling device is used, and is used alone for screwing the diffusion section to drive the tail nozzle to move.

[0008] Preferably, the clamp tool comprises: a clamp, a screw, a connecting bolt, and a nut.

[0009] The clamp is a two-part structure for clamping the rudder cabin and aligning the threaded hole of the clamp with the through hole on the rudder cabin. The screw is used to be screwed into the threaded hole of the clamp until it abuts against the rudder cabin. The connecting bolt is used to connect the two ends of the two-part clamp and is tightened by the nut. The two-part structure forms an incomplete circle, so that the connecting bolt between the two clamps after tightening cooperates with the hook at one end of the pull rod to realize follow-up.

[0010] Preferably, it also includes a felt pad, which is attached to the clamp to avoid scratching the rudder cabin coating.

[0011] Preferably, the anti-following tool comprises a shell, a barb, a plug, a fixing part, and a base.

[0012] The threaded end of the shell is slotted for inserting the barb and the plug. The barb is used to hook the tail pipe, and the plug is used to limit the barb from turning over. The fixing part is fitted inside the modified shell and is connected and fixed by fasteners to fix the barb and the plug on the shell. The base is connected to the other end of the shell to provide stability.

[0013] Preferably, the shell can be newly manufactured or processed from a part of the engine shell after testing. The number of slots is 2-6. The number of barbs and plugs is consistent with the number of slots. The maximum thickness of the barb is 6-7 mm, and the thickness of the plug is 2-3 mm.

[0014] A method for disassembling the divergent section when the tail pipe follows during the full missile maintenance process, comprising:

[0015] Measure and record the distance L1 between the convex end face of the divergent section and the rear end face of the rudder cabin. Measure and record the distance L2 between the inner profile of the divergent section and the tail pipe. Calculate the tail pipe following distance Δ = L1-L2, and confirm whether Δ≤S to determine whether the internal parts of the rudder cabin are safe. S is the safety distance between the tail pipe and the internal parts of the rudder cabin. Both cases need to carry out the next disassembly step.

[0016] Remove the connecting parts between the rudder cabin and the engine shell, install the clamp tool and the anchor pulling tool, and make the rear end face of the rudder cabin flush with the rear end face of the divergent section by the anchor pulling tool.

[0017] Remove the anchor pulling tool, rotate the divergent section wrench disc, and observe the distance L1 between the convex end face of the divergent section and the rear end face of the rudder cabin, and the distance L3 between the rudder cabin and the rear separation surface of the shell.

[0018] If the distance L1 does not exceed S all the time, continue to screw the diffuser section, and observe the distance L3 simultaneously; if the distance L1 exceeds S, install the anchor pulling tool, and make the rear end face of the rudder chamber flush with the rear end face of the diffuser section after installation;

[0019] Continue to rotate the diffuser section wrench disc until the tail nozzle is completely removed, at which time the clamp tool is removed together with the rudder chamber and the tail nozzle, and then the product in this state is horizontally transferred to the pillow, and the transfer process ensures that the clamp tool is in a tightened state;

[0020] Continue to rotate the diffuser section wrench disc until the tail nozzle is completely removed, at which time the clamp tool is removed together with the rudder chamber and the tail nozzle, and then the product in this state is horizontally transferred to the pillow, and the transfer process ensures that the clamp tool is in a tightened state;

[0021] Remove the tail pipe large end sealing ring and the rudder chamber front end sealing ring, and place the tail nozzle with the rudder chamber vertically with the tail pipe thread facing upwards;

[0022] Install the anti-following tool, and install the shell with a fixed part on the tail pipe with the rudder chamber in a vertical state, and screw the modified shell until it abuts against the screw on the clamp tool;

[0023] Remove the clamp tool, and then continue to screw the modified shell until it is installed in place, that is, the rear separation face of the shell is attached to the separation face of the rudder chamber;

[0024] Place the tail nozzle with the rudder chamber horizontally, and abut the shell and the tail pipe in place by the diffuser section wrench against the diffuser section in a horizontal state;

[0025] At the slotted position of the shell, sequentially extend the barb into the interior through the gap between the rudder chamber and the tail pipe shell until the barb hooks the rear end face of the tail pipe thread, and sequentially insert the insert piece into the gap between the barb and the rudder chamber and fix it;

[0026] Vertically assemble the overall structure on the base and fix it;

[0027] Use the diffuser section wrench to disassemble the diffuser section by applying force, and after the diffuser section is normally removed, continue to remove the rudder chamber and the tail pipe.

[0028] Preferably, the base is pre-installed with expansion bolts for fixation.

[0029] Preferably, the certain distance is a distance that can ensure that the screw on the clamp tool contacts the tail pipe thread, and needs to be determined in combination with the specific product design state, and is less than the length of the tail pipe thread.

[0030] Compared with the prior art, the beneficial effects of the present application are that, compared with the conventional diffusion section dismounting tool (only the diffusion section wrench disc), only the full missile maintenance process can be smoothly dismounted, but some tricky special situations often occur in the maintenance process, the tail pipe following rotation phenomenon is one of them, at this time, if the conventional way of continuing to use the diffusion section wrench disc to rotate the diffusion section is adopted, the internal parts of the rudder chamber and the tail pipe will be interfered, thereby causing damage to the parts and unable to be normally used. The diffusion section dismounting tool provided by the present application can effectively solve the technical problem that the diffusion section cannot be normally dismounted due to the tail pipe following rotation phenomenon in the full missile maintenance process, and can also ensure that the rudder chamber and the tail nozzle are not damaged during dismounting, thereby avoiding unnecessary economic losses. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A-Anchor dismounting tool for the diffusion section of the tail pipe following rotation phenomenon in the full missile maintenance process provided by the present application is a cross-sectional view;

[0032] Figure 2 B-Hoop dismounting tool for the diffusion section of the tail pipe following rotation phenomenon in the full missile maintenance process provided by the present application is a cross-sectional view;

[0033] Figure 3 C-Anti-following rotation tool for the diffusion section of the tail pipe following rotation phenomenon in the full missile maintenance process provided by the present application is a cross-sectional view. DETAILED DESCRIPTION

[0034] In the scheme provided by the present application, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0035] The diffusion section dismounting tool for the tail pipe following rotation phenomenon in the full missile maintenance process provided by the present application is further described in detail below in combination with the drawings of the specification, including anchor dismounting tool A, hoop dismounting tool B and anti-following rotation tool C, which are described with reference to Figure 1 , Figure 2 and Figure 3 .

[0036] The anchor pulling tool A mainly moves the rudder cabin so that the rudder cabin and the tail nozzle move together. It comprises a pull rod 1, a support rod 2, a screw rod 3, a screw rod wrench 4, a diffusion section wrench disc 5, and a screw 6. Two pull rods are a group, the pull rod is connected with the support rod through the screw, the middle of the support rod is designed with internal threads, the outer surface of one end of the screw rod is designed with external threads for connecting the support rod, the inner surface is designed with a groove for resisting the diffusion section wrench disc, and the other end is designed with a hole for passing through the screw rod wrench. The working principle of the anchor pulling tool is as follows: the diffusion section wrench disc is fixed, the screw rod resists the diffusion section wrench disc, when the screw rod wrench is turned, the support rod moves outward axially due to the thread engagement between the screw rod and the support rod, thereby driving the pull rod to move axially, and the pull rod further drives the clamp tool and the rudder cabin to move axially.

[0037] The clamp tool B mainly prevents the tail pipe from being damaged due to contact with the rudder cabin under the action of gravity. It comprises a clamp 21, a screw 22, a connecting bolt 23, a nut 24, and a felt pad 25. The clamp is in two halves for easy installation, the two halves of the clamp are fixed through the connecting bolt and the nut, the clamp is provided with threaded holes around the circumference for installing the modified screw, and the clamp is pasted with the felt pad to avoid scratching the coating of the rudder cabin.

[0038] The anti-following tool C mainly limits the axial displacement of the tail pipe to prevent the tail pipe from following during the disassembly of the diffusion section. It comprises a shell 31, a barb 32, a plug 33, a fixing part 34, a base 35, and a screw 36. The shell is provided with a groove at one end for inserting and installing the barb and the plug, the barb is used for hooking the tail pipe, the plug is used for limiting the barb from turning over, the fixing part is sleeved on the inner side of the shell and is fixed through the screw, and the main purpose is to fix the barb and the plug on the shell. The base is connected to one side of the shell through the screw and plays a stabilizing role. The base can be installed on the ground through expansion bolts as needed.

[0039] When the tail pipe follows during the disassembly process, the anchor pulling tool A and the clamp tool B are used in combination first, the rudder cabin can move outward alone, and the diffusion section is screwed by the diffusion section wrench disc alone, and the tail nozzle moves outward. The two tools are used alternately, the rudder cabin and the tail nozzle can be disassembled at the same time under the condition of maintaining a safe distance. Then the anti-following tool C is used, which can limit the axial displacement of the tail pipe to prevent the tail pipe from following during the disassembly of the diffusion section. After the diffusion section is successfully disassembled, the rudder cabin and the tail pipe can also be easily disassembled.

[0040] Specifically, in the scheme provided in the embodiments of the present application, the screw rod 3 of the anchor pulling tool A has a thread specification of M36x1.5, and the length of the pull rod 1 is 500 mm. The inner diameter of the hoop 21 of the hoop tool B is 314 mm, and eight M10 threaded holes are provided. The shell 31 of the anti-following tool C can be newly manufactured or processed from a part of the engine shell after testing, and four slots are provided. The number of the barbs 32 and the inserts 33 is consistent with the number of the slots. The maximum thickness of the barbs 32 is 6.8 mm, and the thickness of the inserts 33 is 3 mm.

[0041] The specific implementation steps of the dismounting tool are as follows (the unit of distance is mm):

[0042] 1) Measure and record the distance L1 between the convex rudder cabin rear end surface of the diffusion section and the rudder cabin rear end surface;

[0043] 2) Measure and record the distance L2 between the inner profile surface of the diffusion section and the tail pipe;

[0044] 3) Calculate the tail pipe following distance Δ = L1-L2, and confirm whether Δ≤S (S is the safety distance of the tail pipe and the internal parts of the rudder cabin);

[0045] 4) Remove the connecting parts between the rudder cabin and the engine shell;

[0046] 5) Install the hoop tool B, align the threaded holes of the hoop 21 with the through holes on the rudder cabin, then screw the screws 22 into the corresponding threaded holes of the hoop 21, until they abut against the rudder cabin, and finally install the nuts 24 to tighten the connecting bolts 23;

[0047] 6) Install the anchor pulling tool A, and hook the pull rod 1 around the connecting bolt 3;

[0048] 7) Rotate the screw wrench 4 until the rudder cabin rear end surface is flush with the diffusion section rear end surface;

[0049] 8) Remove the anchor pulling tool A, rotate the diffusion section wrench disc, and simultaneously observe the distance L1 between the diffusion section rear end surface and the rudder cabin rear end surface, and the distance L3 between the rudder cabin and the shell rear separation surface;

[0050] 9) If the distance L1 does not exceed S at all, continue to rotate the diffusion section (synchronously observe the distance L3);

[0051] 10) If the distance L1 exceeds S, install the anchor pulling tool A, and after installation, rotate the screw wrench 4 until the rudder cabin rear end surface is flush with the diffusion section rear end surface;

[0052] 11) so on, until L3 reaches a certain distance and stops screwing, at this time the screw 22 on the clamp tool is continued to be screwed in until it reaches the tail pipe thread, and the radial position of the tail nozzle and the rudder cabin is fixed;

[0053] 12) Continue to screw the diffuser segment wrench disc until the tail nozzle is completely removed, at this time the clamp tool B is removed with the rudder cabin and tail nozzle, and then the product in this state is transferred horizontally to the pillow, and the transfer process ensures that the clamp tool is in a tightened state.

[0054] 13) Take out the tail pipe large end sealing ring and the rudder cabin front end sealing ring, and place the tail nozzle with the rudder cabin vertically (the tail pipe thread upwards);

[0055] 14) Install the anti-following tool C, install the shell 31 (including the fixing part 34) to the tail nozzle with the rudder cabin in a vertical state, and screw the shell 31 until it reaches the screw 22 on the clamp tool;

[0056] 15) Remove the clamp tool B, and then continue to screw the shell 31 until it is installed in place (the shell 31 rear separation surface and the rudder cabin separation surface are in contact);

[0057] 16) Place the tail nozzle with the rudder cabin horizontally, and pre-tighten the shell 31 and the tail pipe to the tail nozzle by the diffuser segment wrench disc in a horizontal state;

[0058] 17) At the slotted position of the shell 31, the barb 32 is inserted into the interior through the gap between the rudder cabin and the tail pipe shell in sequence until the barb 32 hooks the tail pipe thread rear end surface;

[0059] 18) Insert the insert 33 into the gap between the barb 32 and the rudder cabin in sequence, and install the screw 36 for fixation;

[0060] 19) After the above parts are fixed in place, the whole structure is vertically fitted on the base 35 (the base 35 is pre-installed with expansion bolt fixation), and the screw 36 is installed for fixation;

[0061] 20) Use the diffuser segment wrench disc to disassemble the diffuser segment, and continue to disassemble the rudder cabin and the tail pipe after the diffuser segment is normally removed.

[0062] The disassembly tool has been applied in a certain type, and its feasibility and operability have been verified. The use risk is controllable, and it can meet the disassembly requirements of the whole missile maintenance process.

[0063] Compared with the conventional diffusion section dismounting tool (only the diffusion section wrench disc), only the full bomb maintenance process can be smoothly dismounted, but some tricky special situations often occur in the maintenance process, the tail pipe following rotation phenomenon belongs to one of them, at this time, if the conventional way continues to use the diffusion section wrench disc to rotate the diffusion section, the internal parts of the rudder chamber and the tail pipe will interfere, thereby causing the parts damage and unable to be normally used. The diffusion section dismounting tool can effectively solve the technical problem that the diffusion section cannot be normally dismounted due to the tail pipe following rotation phenomenon in the full bomb maintenance process, and can also ensure that the rudder chamber and the tail nozzle are not damaged in the dismounting process, thereby avoiding unnecessary economic losses.

[0064] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A diffuser section dismounting tool suitable for the full elastic repair process of the tail pipe of the follow-up phenomenon, characterized in that, The utility model relates to a kind of anchor pulling tool, hoop tool and anti-following tool, and the utility model discloses the following technical scheme: The hoop tool is used to hoop fixed rudder cabin, prevent tail pipe from being damaged due to gravity and rudder cabin contact;The hoop tool is connected with anchor pulling tool, under the driving of anchor pulling tool, make rudder cabin follow movement, then separately use diffusion section wrench disc, so that tail pipe moves to outside, so alternately use, make rudder cabin and tail pipe alternate movement to outside;The anti-following tool is used to limit the axial displacement of tail pipe, prevent tail pipe from following when diffusion section is removed; The anchor pulling tool includes pull rod, support rod, screw rod, screw wrench and diffusion section wrench disc; Two pull rods are a group, one end of two pull rods is connected at two ends of support rod respectively, the other end of two pull rods is provided with inward hook for cooperation with hoop tool, so that hoop tool follows movement;Middle of support rod is designed with internal thread for cooperation with external thread on outer surface of screw rod, upper end of screw rod is provided with recess for abutting against diffusion section wrench disc, other end is provided with hole for passing screw wrench, diffusion section wrench disc is used to abut against diffusion section for driving rudder cabin to follow movement when anchor pulling tool is used, and is used to screw diffusion section for driving tail nozzle to move when diffusion section is used alone. The hoop tool includes hoop, screw, connecting bolt and nut; 2. The diffusion section dismounting tool according to claim 1, characterized in that: The hoop is two-petal structure, used to hoop rudder cabin and make the screw hole of hoop align with through hole on rudder cabin, the screw is used to screw into the screw hole of hoop until abutting against rudder cabin, connecting bolt is used to connect two ends of two-petal hoop and is tightened by nut;Two-petal structure forms a non-complete circle, so that connecting bolt between two-petal hoop and hook at one end of pull rod cooperate to realize follow movement after being tightened. Felt pad is further included, and felt pad is pasted on hoop to avoid damaging coating of rudder cabin.

3. The diffusion section dismounting tool according to claim 2, characterized in that: The anti-following tool includes shell, barb, insert, fixing part and base; 4. The diffusion section dismounting tool according to claim 2, characterized in that: Shell is slotted at one end with thread, used to insert and install barb and insert, barb is used to hook tail pipe, insert is used to limit barb from turning over, fixing part is sleeved on inner side of shell and is connected and fixed by fastener, used to fix barb and insert on shell, base is connected at other end of shell, and plays the role of stabilizing. Shell can be newly made or processed from part of engine shell after test, and the number of slots is 2-6, the number of barb and insert is consistent with the number of slots, the maximum thickness of barb is 6-7mm, and the thickness of insert is 2-3mm.

5. The diffusion section dismounting tool according to claim 4, characterized in that: Including:

6. A method for disassembling the diffuser section of the tail pipe that has occurred following the full-bomb repair process, using the disassembling tooling for the diffuser section of the tail pipe that has occurred following the full-bomb repair process according to claim 4, characterized in that Measure and record the distance L1 between the convex end face of diffusion section rear end and the rear end of rudder cabin;Measure and record the distance L2 between the inner profile of diffusion section and tail pipe; Calculate the distance of tail pipe following Δ=L1-L2, confirm whether Δ≤S, to confirm whether the internal parts of rudder cabin are safe in advance, S is the safety distance between tail pipe and internal parts of rudder cabin;Whether it is satisfied or not, next step of dismounting needs to be carried out; Remove the connecting part between rudder cabin and engine shell, install hoop tool and anchor pulling tool, make the rear end face of rudder cabin flush with the rear end face of diffusion section by anchor pulling tool. ​ Remove the anchor pulling tool, and screw the diffuser segment wrench disc, while observing the distance L1 between the convex rudder cabin rear end surface and the rudder cabin rear end surface, and the distance L3 between the rudder cabin and the shell rear separation surface; If the distance L1 always does not exceed S, continue to screw the diffuser segment, and synchronously observe the distance L3; if the distance L1 exceeds S, install the anchor pulling tool, and after installation, make the rudder cabin rear end surface flush with the diffuser segment rear end surface through the anchor pulling tool; Continue to rotate the diffuser segment wrench disc until the tail nozzle is completely removed, at which time the clamp tool is removed together with the rudder cabin and the tail nozzle, and then the product in this state is horizontally transferred to the bolster, and the transfer process ensures that the clamp tool is in a tightened state; Remove the tail pipe large end sealing ring and the rudder cabin front end sealing ring, and place the tail nozzle with the rudder cabin vertically with the tail pipe thread upward; Install the anti-following tool, and install the shell with the fixed part on the tail pipe with the rudder cabin in a vertical state, and screw the shell until it abuts against the screw on the clamp tool; Remove the clamp tool, and then continue to screw the shell until it is installed in place, that is, the shell rear separation surface is attached to the rudder cabin separation surface; Place the tail nozzle with the rudder cabin horizontally, and abut the diffuser segment against the diffuser segment through the diffuser segment wrench in a horizontal state, and pre-tighten the shell and the tail pipe in place; At the slotted position of the shell, sequentially insert the barbs into the gap between the rudder cabin and the tail pipe shell, and then into the interior, until the barbs hook the tail pipe thread rear end surface; Sequentially insert the inserts into the gap between the barbs and the rudder cabin, and fix them; Vertically assemble the overall structure on the base and fix it; Use the diffuser segment wrench to disassemble the diffuser segment, and after the diffuser segment is normally removed, continue to remove the rudder cabin and the tail pipe. The base is pre-installed with expansion bolts for fixation.

7. The method of claim 6, wherein The certain distance is a distance that can ensure that the screw on the clamp tool contacts the tail pipe thread, which needs to be determined in combination with the specific product design state, and is less than the length of the tail pipe thread.

8. The method of claim 6, wherein: ​

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