Efficient Assembly Device and Method for Aeroengine Spring Assembly

Abstract

The present invention discloses an efficient assembly device and method for an aero-engine spring assembly. The efficient assembly device includes a mounting base, a volute spring tightening device, and a volute spring pressing device. The mounting base is mainly used to play a role of fixing and supporting during the use of the entire assembly tooling, preventing the assembly tooling from moving during the operation. The volute spring tightening device is fixed on the mounting base, and the volute spring is tightened through components such as a rotating mechanism and a working disk. The pressing device presses the volute spring tightened within the limiting ring into the housing of the spring assembly at a specified position through components such as a pressing mechanism, a limiting ring, and a gland, realizing the assembly of the volute spring. The present invention reduces the assembly labor intensity of workers, and at the same time improves the one-time success rate and assembly quality of the spring assembly.

Description

Technical Field

[0001] The present invention belongs to the technical field of aero-engine overall assembly and commissioning, and specifically relates to an efficient assembly device and method for a scroll spring in an aero-engine spring assembly. Background Art

[0002] Spring assemblies are widely used in the nozzle feedback system of aero-engines, aiming to provide real-time feedback on the operating status of the afterburner components during engine operation. In the assembly of spring assemblies, the assembly of multiple fine parts is involved, and among them, the assembly technology of scroll springs is the most difficult.

[0003] The specific assembly process of the scroll spring requires reducing the diameter of the scroll spring by more than twice, then press-fitting it into the housing of the spring assembly, and then limiting the holes on the scroll spring through a stop pin. During the contraction process of the scroll spring, it is necessary to overcome the self-elastic force of the scroll spring, and this process is relatively difficult to achieve.

[0004] At present, the commonly used method is to continuously rotate manually and tighten by screwing with three circumferential bolts. In this method, the operator needs to apply force continuously throughout the process. When the contracted scroll spring does not reach the assembly state, it needs to be adjusted repeatedly; at the same time, when installing the contracted scroll spring into the housing, due to the inability to circumferentially position, it is necessary to repeatedly adjust the initial position of the scroll spring, resulting in low efficiency. The elastic force of the scroll spring is relatively large, and improper operation is extremely likely to cause injury to the operator. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention aims to provide an efficient assembly device and method for an aero-engine spring assembly, realizing the stable, fast, efficient and safe installation of the scroll spring, and at the same time improving the assembly quality of the scroll spring.

[0006] The present invention adopts the following technical solutions:

[0007] An efficient assembly device for an aero-engine spring assembly includes a mounting base, a scroll spring tightening device and a scroll spring press-fitting device, wherein:

[0008] The scroll spring tightening device mainly consists of a working disk, a wrench, a fixing screw, a movable handle, a pawl, a movable pressing plate, a pressing plate and a slider;

[0009] The wrench simultaneously passes through and is rotatably inserted into the through holes of the mounting base and the working disk. A card slot is provided on the outer surface of the first axial end of the wrench. The end face of the first axial end of the wrench is detachably connected to the pressing plate. The second axial end of the wrench is inserted into the movable handle. Ratch teeth are provided on the surface of the wrench and between the movable handle and the mounting base;

[0010] On the surface of the working disk on the same side as the pressing plate, there are provided bosses and sliders for limiting and guiding the scroll spring;

[0011] The movable pressure plate is slidably connected to the mounting seat. A limiting groove matching the outer diameter of the wrench is formed in the movable pressure plate, and the moving path of the movable pressure plate intersects with the wrench.

[0012] The pawl is rotatably connected to the mounting seat with a fixing screw as the rotation axis. The pawl includes a pawl portion and a counterweight portion. The pawl portion cooperates with the ratchet teeth on the wrench, and the torque of the counterweight portion about the fixing screw is greater than that of the pawl portion about the fixing screw and in the opposite direction.

[0013] The scroll spring tightening device mainly consists of a bracket, a limiting ring, a gland, a fixed handle and a sleeve.

[0014] The bracket is C-shaped, on which a fixed handle is threadedly connected. One end of the fixed handle is connected to the gland, and the outer diameter of the gland is smaller than the inner cavity diameter of the sleeve.

[0015] The outer diameter of the limiting ring is larger than the outer diameter of the gland and smaller than the inner cavity diameter of the sleeve.

[0016] Furthermore, the scroll spring tightening device further includes a limiting screw, which is threadedly connected to the guide plate, and the axis of the limiting screw intersects with the sliding path of the movable pressure plate.

[0017] Furthermore, the scroll spring tightening device further includes a locking pin, which is slidably connected to the mounting plate and one end of the locking pin is connected to the movable pressure plate.

[0018] Furthermore, the scroll spring tightening device further includes a guide plate, which is fixedly connected to the mounting seat. A notch is formed in the guide plate, and the movable pressure plate is slidably connected in the notch. The cross-sectional shape of the guide plate is similar to that of a channel steel, and the movable pressure plate slides in the groove of the channel steel.

[0019] Furthermore, the scroll spring tightening device further includes an adjusting bolt, which is threadedly connected to the working disk. The adjusting bolt is located on the sliding path of the slider and the axis of the adjusting bolt is parallel to the moving direction of the slider.

[0020] Furthermore, the limiting ring includes a section of step. When the limiting ring is inserted between the gland and the sleeve, the step is located outside the sleeve.

[0021] The assembly method of the aero-engine spring assembly adopting the above high-efficiency assembly device includes the following steps:

[0022] Step 1, move the movable pressure plate so that its limiting groove presses tightly on the wrench and keeps in contact with the end face of the ratchet teeth. Snap the fold angle in the scroll spring into the card slot on the wrench, and rotate the movable handle in the same direction to drive the wrench to rotate. The scroll spring rotates with the wrench and tightens under the limiting and guiding effects of the convex platform on the working disk.

[0023] Step 2: Move the slider on the working plate so that the slider keeps the limiting state of the volute spring.

[0024] Step 3: When the outer diameter of the volute spring is about to contact the boss on the working plate, remove the pressure plate at the end of the wrench, sleeved the limiting ring on the outside of the volute spring, and move the movable pressure plate so that its limiting groove disengages from the end faces of the wrench and the ratchet teeth.

[0025] Step 4: Pull the wrench towards the movable wrench side through the movable handle until the volute spring exits the card slot on the wrench and separates and tightens into the limiting ring.

[0026] Step 5: Install the housing of the spring assembly on the bracket.

[0027] Step 6: Install the limiting ring with the volute spring on the housing of the spring assembly.

[0028] Step 7: Sleeve the sleeve on the outside of the limiting ring.

[0029] Step 8: Rotate the fixed handle to drive the gland to apply pressure to the volute spring in the limiting ring so as to press the volute spring into the housing of the spring assembly to complete the assembly.

[0030] Compared with the prior art, the present invention can efficiently implement the assembly of the spring assembly, solve the dilemma of no special tooling in the past, reduce the labor intensity of workers, and at the same time improve the one-time success rate and assembly quality of the spring assembly. Description of the Drawings

[0031] Figure 1 is the structure of the volute spring tightening device;

[0032] Figure 2 is the top view of the volute spring tightening device;

[0033] Figure 3 is the structure diagram of the volute spring pressing device;

[0034] Figure 4 is the structure diagram of the mounting seat;

[0035] Figures 5 to 8 is the overall installation drawing of the assembly device for efficiently assembling the spring assembly of the aeroengine;

[0036] In the figure, 1 - working plate; 2 - wrench; 3 - fixing screw; 4 - movable handle; 5 - pawl; 6 - locking pin; 7 - guide plate; 8 - movable pressure plate; 9 - pressure plate; 10 - limiting screw; 11 - slider; 12 - bracket; 13 - limiting ring; 14 - gland; 15 - fixed handle; 16 - sleeve; 17 - support; 18 - fixing bolt; 19 - base; 20 - boss; 21 - adjusting bolt; 22 - ratchet teeth; 23 - step. Detailed implementation mode

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments. Without departing from the above technical idea of the present invention, all modifications, substitutions, and changes made according to common technical knowledge and conventional means in the art are included in the scope of the present invention.

[0038] As Figures 5 to 8 shown, the high-efficiency assembly device for the spring assembly includes: a mounting base, a volute spring tightening device, and a volute spring pressing device, where:[[]]END]]

[0039] (1) The mounting base is mainly used to play a role of fixing and supporting during the use of the entire assembly tooling, preventing the assembly tooling from moving during operation and bringing inconvenience to the operator;

[0040] (2) The volute spring tightening device is the core part of the application of this assembly device. This part is fixed on the mounting base, and the volute spring is tightened through components such as a rotating mechanism and a working disk 1 to meet the assembly requirements;

[0041] (3) The pressing device presses the volute spring tightened within the limiting ring 13 into the shell of the spring assembly at a specified position through components such as a pressing mechanism, a limiting ring 13, and a gland 14 to achieve the assembly of the volute spring.

[0042] As Figures 1 to 4 shown, the high-efficiency assembly device for the aero-engine spring assembly mainly consists of 1 mounting base, 1 volute spring tightening device, and 1 volute spring pressing device as the main components. The volute spring tightening device is installed on the mounting base and is used to tighten the volute spring; the volute spring pressing device is an independent structure and mainly realizes pressing the tightened volute spring into the shell of the spring assembly to complete the assembly work of the volute spring.

[0043] As Figure 4 , the mounting base is composed of a support 17 and a base 19 and is connected and fixed by 8 fixing bolts 18.

[0044] As Figure 1 、 2As shown in Figures 5 and 6, the scroll spring tightening device consists of a working disk 1, a wrench 2, a fixing screw 3, a movable handle 4, a pawl 5, three locking pins 6, a guide plate 7, a movable pressing plate 8, a pressing plate 9, a limit screw 10, and two sliders 11. The wrench 2, the movable handle 4, and the pressing plate 9 form a rotating member for driving the scroll spring to rotate. The pawl 5 is designed with an eccentric structure. Utilizing its own gravity and the lever action with the fixing screw 3 as the rotation fulcrum, it cooperates with the ratchet teeth 22 on the wrench 2 to achieve the one-way rotation function of clockwise rotation and counterclockwise stop, which can prevent the wrench 2 from rebounding counterclockwise under the influence of the elastic force of the scroll spring during the rotation process. The working disk 1 and the two sliders 11 form a guiding disk structure. The boss 20 structure on the working disk 1 is used to guide the scroll spring during the contraction process, enabling the scroll spring to contract along a specific path. The two sliders 11 are used to constrain the outer contour of the contracted scroll spring to ensure that the scroll spring is relatively smooth after contraction. The three locking pins 6, the guide plate 7, the movable pressing plate 8, and the limit screw 10 form a limiting mechanism, mainly to axially limit the wrench 2 in the rotating state (clamping on the end face of the ratchet teeth 22 to limit the axial movement of the wrench 2), prevent the wrench 2 from slipping outwards. At the same time, after the scroll spring completes the tightening work, the limiting mechanism is withdrawn, and the wrench 2 can move towards the side of the movable handle 4. After the scroll spring is blocked by the working disk 1, it disengages from the wrench 2 to complete the tightening work of the scroll spring. The guide plate 7 is selected as a channel steel and is installed on the support 17 by screws. The groove of the channel steel serves as the sliding space for the movable pressing plate 8. The limit screw 10 is threadedly connected to the bottom surface of the channel steel to achieve the pressing and positioning of the movable pressing plate 8.

[0045] As shown in Figure 3 , 7 and 8, the scroll spring pressing device consists of a bracket 12, a limit ring 13, a pressing cover 14, a fixed handle 15, and a sleeve 16. The limit ring 13 is used to transfer the tightened scroll spring from the scroll spring tightening device to the scroll spring pressing device, and the pressing cover 14 is driven by the fixed handle 15 to press the scroll spring into the spring assembly housing.

[0046] The assembly method of the scroll spring using the above assembly device is as follows:

[0047] 1. Move the movable pressing plate 8, press its limit groove on the wrench 2 and closely attach it to the end face of the ratchet teeth 22. Install the scroll spring on the scroll spring tightening device. The fold angle inside the scroll spring is caught in the slot of the wrench 2. Drive the wrench 2 to rotate clockwise by rotating the movable handle 4. The scroll spring is tightened regularly under the limitation of the boss 20 on the working disk 1.

[0048] 2. Drive the two sliders 11 to move towards the center of the working disk 1 by screwing two adjusting bolts 21 to uniformly limit the scroll spring.

[0049] 3. When the scroll spring is tightened within the range of the boss 20, remove the pressure plate 9, install the limit ring 13 on the scroll spring, and drive the movable pressure plate 8 by screwing the locking pin 6 to withdraw the limiting mechanism;

[0050] 4. Move the wrench 2 towards the movable handle 4 through the movable handle 4. The scroll spring is blocked by the working disk 1 and separated from the wrench 2. At this time, the scroll spring is tightened into the limit ring 13;

[0051] 5. Install the housing of the spring assembly on the bracket 12;

[0052] 6. Install the limit ring 13 with the scroll spring on the housing of the spring assembly, and perform circumferential positioning through the step 23 of the limit ring 13;

[0053] 7. Put the sleeve 16 on the outer ring of the limit ring 13 to center the limit ring 13;

[0054] 8. Apply pressure to the scroll spring by rotating the fixed handle 15 to drive the gland 14. Under the action of the force, the scroll spring is pressed from within the limit ring 13 into the housing of the spring assembly, and finally the assembly of the scroll spring is completed.

[0055] The content not described in detail in the specification of the present invention belongs to the prior art well-known to those skilled in the art. Although the illustrative specific embodiments of the present invention are described above for the understanding of those skilled in the art of the present technology, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of the present technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

Claims

1. An efficient assembly device for an aero-engine spring assembly, characterized in that: It includes a mounting base, a volute spring tightening device and a volute spring pressing device, wherein: The volute spring tightening device is composed of a working disk (1), a wrench (2), a fixing screw (3), a movable handle (4), a pawl (5), a movable pressing plate (8), a pressing plate (9) and a slider (11); The wrench (2) penetrates and is rotatably inserted into the through holes of the mounting base and the working disk (1) at the same time. A clamping groove is arranged on the outer surface of the first axial end of the wrench (2). The end face of the first axial end of the wrench (2) is detachably connected to the pressing plate (9). The second axial end of the wrench (2) is inserted into the movable handle (4). Ratch teeth (22) are arranged on the surface of the wrench (2) between the movable handle (4) and the mounting base; On the surface of the working disk (1) on the same side as the pressing plate (9), there are convex platforms (20) and sliders (11) for limiting and guiding the volute spring; The movable pressing plate (8) is slidably connected to the mounting base. A limiting groove matching the outer diameter of the wrench (2) is opened on the movable pressing plate (8). The moving path of the movable pressing plate (8) intersects with the wrench (2); The pawl (5) is rotatably connected to the mounting base with the fixing screw (3) as the rotation axis. The pawl (5) includes a pawl part and a counterweight part. The pawl part cooperates with the ratchet teeth (22) on the wrench (2). The torque of the counterweight part about the fixing screw (3) is greater than that of the pawl part about the fixing screw (3) and the directions are opposite; The volute spring pressing device is composed of a bracket (12), a limiting ring (13), a gland (14), a fixed handle (15) and a sleeve (16); The bracket (12) is in a C shape, and a fixed handle (15) is threadedly connected thereto. One end of the fixed handle (15) is connected to the gland (14). The outer diameter of the gland (14) is smaller than the inner cavity diameter of the sleeve (16); The outer diameter of the limiting ring (13) is larger than the outer diameter of the gland (14) and smaller than the inner cavity diameter of the sleeve (16).

2. The high-efficiency assembly device for the aero-engine spring assembly according to claim 1, wherein: The volute spring tightening device further includes a limiting screw (10). The limiting screw (10) is threadedly connected to the guide plate (7), and the axis of the limiting screw (10) intersects with the sliding path of the movable pressing plate (8).

3. The high-efficiency assembly device for the aero-engine spring assembly according to claim 1, wherein: The volute spring tightening device further includes a locking pin (6). The locking pin (6) is slidably connected to the mounting plate and one end of the locking pin (6) is connected to the movable pressing plate (8).

4. The high-efficiency assembly device for the aero-engine spring assembly according to claim 1, wherein: The volute spring tightening device further includes a guide plate (7). The guide plate (7) is fixedly connected to the mounting base. A notch is opened on the guide plate (7), and the movable pressing plate (8) is slidably connected in the notch.

5. The high-efficiency assembly device for the aero-engine spring assembly according to claim 1, characterized in that: The volute spring tightening device further includes an adjusting bolt (21). The adjusting bolt (21) is threadedly connected to the working disk (1). The adjusting bolt (21) is located on the sliding path of the slider (11) and the axis of the adjusting bolt (21) is parallel to the moving direction of the slider (11).

6. The high-efficiency assembly device for the aero-engine spring assembly according to claim 1, characterized in that: The limiting ring (13) includes a section of step (23). When the limiting ring (13) is inserted between the gland (14) and the sleeve (16), the step (23) is located outside the sleeve (16).

7. An assembly method for an aero-engine spring assembly using the high-efficiency assembly device for the aero-engine spring assembly described in claim 1, characterized in that: Include, Step 1: Move the movable pressure plate (8) so that its limiting groove presses tightly on the wrench (2) and remains in contact with the end face of the ratchet tooth (22). Snap the fold angle in the scroll spring into the card slot on the wrench (2). Rotate the movable handle (4) in the same direction to drive the wrench (2) to rotate. The scroll spring rotates with the wrench (2) and tightens under the limiting and guiding action of the boss (20) on the working disk (1). Step 2: Move the slider (11) on the working disk (1) so that the slider (11) maintains the limiting state of the scroll spring. Step 3: When the outer diameter of the scroll spring is about to contact the boss (20) on the working disk (1), remove the pressure plate (9) at the end of the wrench (2), sleeved the limiting ring (13) on the outside of the scroll spring, and move the movable pressure plate (8) so that its limiting groove disengages from the wrench (2) and the end face of the ratchet tooth (22). Step 4: Pull the wrench (2) towards the movable handle (4) side through the movable handle (4) until the scroll spring exits the card slot on the wrench (2) and separates and tightens into the limiting ring (13). Step 5: Install the housing of the spring assembly on the bracket (12). Step 6: Install the limiting ring (13) containing the scroll spring on the housing of the spring assembly. Step 7: Sleeve the sleeve (16) on the outside of the limiting ring (13). Step 8: Rotate the fixed handle (15) to drive the gland (14) to apply pressure to the scroll spring in the limiting ring (13) so as to press the scroll spring into the spring assembly housing to complete the assembly.

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