A coaxiality auxiliary tool for turbojet engine assembly

Abstract

This utility model discloses a coaxiality auxiliary tool for assembling a turbojet engine, belonging to the technical field of turbojet engine technology. It includes a fixed frame, a turbojet engine placement platform fixed to the fixed frame, a connecting seat fixed to the turbojet engine placement platform, a coaxiality fixture inside the connecting seat, and a handle on one side of the connecting seat, which is connected to the coaxiality fixture via a transmission connection. The top surface of the fixed frame has a recessed platform for placing the turbojet engine. The turbojet engine is placed on the turbojet engine placement platform, and the handle is pressed down. The coaxiality fixture passes through the diffuser front cover and shaft tube of the turbojet engine. At this time, the shaft tube and the diffuser front cover are aligned and coaxial by the coaxiality fixture. Then, the screws of the diffuser front cover are glued and tightened. The handle is lifted, and the coaxiality fixture is removed from the turbojet engine. The compressor wheel, main shaft, and air inlet are then installed onto the turbojet engine to complete the assembly. This utility model can save assembly time and improve work efficiency while ensuring coaxiality accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of turbojet engine technology, and in particular relates to a coaxiality auxiliary tool for turbojet engine assembly. Background Technology

[0002] In the existing technology, the assembly of turbojet engines is time-consuming. It requires installing the shaft tube, diffuser front cover, air inlet, and compressor wheel together, and then manually adjusting the coaxiality. At the same time, it also requires repeated hammering. This process takes about 40 minutes for each turbojet engine. If the coaxiality adjustment is not done by experienced employees, the accuracy will be low, which may lead to the engine crashing when the turbojet engine runs at high speed. Utility Model Content

[0003] The purpose of this invention is to provide a coaxiality aid for assembling turbojet engines, in order to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a coaxiality auxiliary tool for assembling a turbojet engine, including a fixed frame, a turbojet engine placement platform fixedly connected to the fixed frame, a connecting seat fixedly connected to the turbojet engine placement platform, a coaxiality fixture provided inside the connecting seat, a handle provided on one side of the connecting seat, the handle being pulsatorically connected to the coaxiality fixture, and a recessed platform for placing the turbojet engine provided on the top surface of the fixed frame, the recessed platform being perpendicular to and concentric with the coaxiality fixture.

[0005] Preferably, the coaxiality fixture includes a connector that is slidably connected to the connecting seat, the connector being drively connected to the handle, a positioner being fixedly connected to the bottom of the connector, and a bearing connection portion being fixedly connected to the bottom of the positioner.

[0006] Preferably, the bearing connection includes a high-precision bearing fixed to the bottom of the positioner, and a high-precision bearing guide is fixed to the bottom of the high-precision bearing.

[0007] Preferably, the positioner is a diffuser front cover positioner.

[0008] Preferably, the number of high-precision bearings is two.

[0009] Preferably, the high-precision bearing guide is tapered.

[0010] Preferably, the concentricity between the recess and the coaxiality tooling is ≤0.02mm.

[0011] This utility model discloses the following technical effects: In use, the turbojet engine is placed on the recessed platform of the turbojet engine mounting stand. The handle is pressed down, and the coaxiality fixture is inserted into the diffuser front cover and shaft tube of the turbojet engine. At this time, the shaft tube and diffuser front cover are aligned and coaxial by the coaxiality fixture. Then, the screws of the diffuser front cover are glued and tightened. The handle is lifted, and the coaxiality fixture is removed from the turbojet engine. The compressor wheel, main shaft, and air inlet are then installed onto the turbojet engine to complete the assembly. Different engine models are equipped with coaxiality fixtures of different sizes. The coaxiality fixture is detachable for easy operation. This utility model can save assembly time and improve work efficiency while ensuring coaxiality accuracy. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0013] Figure 1 This is a front view of the coaxiality auxiliary fixture used during the assembly of the turbojet engine of this utility model.

[0014] Figure 2 This is a side view of the coaxiality auxiliary tool used during the assembly of the turbojet engine of this utility model.

[0015] Figure 3 This is a schematic diagram of the coaxiality tooling of this utility model;

[0016] Figure 4 This is a structural diagram of the coaxiality auxiliary tool used during the assembly of the turbojet engine of this utility model.

[0017] In the diagram: 1. Fixture; 2. Turbojet engine mounting platform; 3. Connector; 4. Handle; 5. Recess; 6. Connector; 7. Positioner; 8. High-precision bearing; 9. High-precision bearing guide. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Reference Figures 1-4As shown, this embodiment provides a coaxiality auxiliary tool for assembling a turbojet engine, including a fixed frame 1, a turbojet engine placement platform 2 fixedly connected to the fixed frame 1, a connecting seat 3 fixedly connected to the turbojet engine placement platform 2, a coaxiality tooling provided inside the connecting seat 3, a handle 4 provided on one side of the connecting seat 3, the handle 4 being connected to the coaxiality tooling in a transmission manner, and a recessed platform 5 for placing the turbojet engine provided on the top surface of the fixed frame 1, the recessed platform 5 being perpendicular to and concentric with the coaxiality tooling.

[0021] In use, place the turbojet engine on the recessed platform 5 of the turbojet engine mounting stand 2, press down the handle 4, and insert the coaxiality fixture into the diffuser front cover and shaft tube of the turbojet engine. At this time, the shaft tube and the diffuser front cover are aligned and coaxial by the coaxiality fixture. Then, apply glue to the screws of the diffuser front cover and tighten them. Lift the handle 4, and the coaxiality fixture is removed from the turbojet engine. Now, install the compressor wheel, main shaft, and air inlet onto the turbojet engine to complete the assembly. Different engine models are equipped with coaxiality fixtures of different sizes. The coaxiality fixture is detachable for easy operation. This utility model can save assembly time and improve work efficiency while ensuring coaxiality accuracy. The coaxiality adjustment time for this process is reduced to 10 minutes per turbojet engine. The coaxiality accuracy is controlled within 0.05mm.

[0022] Further optimization of the scheme: the coaxiality fixture includes a connector 6 that is slidably connected to the connecting seat 3, the connector 6 is connected to the handle 4 for transmission, the bottom of the connector 6 is fixedly connected to a positioner 7, and the bottom of the positioner 7 is fixedly connected to a bearing connection part.

[0023] The design is further optimized so that the bearing connection part includes a high-precision bearing 8 fixed to the bottom of the positioner 7, and a high-precision bearing guide 9 fixed to the bottom of the high-precision bearing 8.

[0024] The scheme was further optimized, and the positioner 7 is the front cover positioner 7 of the diffuser.

[0025] The design was further optimized so that the number of high-precision bearings 8 is either 1 or 2, serving to ensure coaxiality accuracy. The high-precision bearings 8 are either high-precision HQW bearings or high-precision GRW bearings.

[0026] The design has been further optimized, with the high-precision bearing guide now tapered. This guide is used to insert the coaxiality tooling into the shaft tube.

[0027] The scheme was further optimized so that the concentricity of the recess and the coaxiality tooling is ≤0.02mm.

[0028] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A coaxiality auxiliary tool for assembling a turbojet engine, characterized in that: The device includes a fixed frame (1), on which a turbojet engine placement platform (2) is fixedly connected. A connecting seat (3) is fixedly connected to the turbojet engine placement platform (2). A coaxiality fixture is provided inside the connecting seat (3). A handle (4) is provided on one side of the connecting seat (3). The handle (4) is connected to the coaxiality fixture in a transmission manner. A recess (5) for placing the turbojet engine is provided on the top surface of the fixed frame (1). The recess (5) is perpendicular to and concentric with the coaxiality fixture.

2. The coaxiality fixture for assembling a turbojet engine according to claim 1, characterized in that: The coaxiality fixture includes a connector (6) that is slidably connected to the connecting seat (3), the connector (6) being drivenly connected to the handle (4), a positioner (7) being fixedly connected to the bottom of the connector (6), and a bearing connection part being fixedly connected to the bottom of the positioner (7).

3. The coaxiality fixture for assembling a turbojet engine according to claim 2, characterized in that: The bearing connection includes a high-precision bearing (8) fixed to the bottom of the positioner (7), and a high-precision bearing guide (9) is fixed to the bottom of the high-precision bearing (8).

4. The coaxiality fixture for assembling a turbojet engine according to claim 2, characterized in that: The positioner (7) is the diffuser front cover positioner (7).

5. The coaxiality fixture for assembling a turbojet engine according to claim 3, characterized in that: The number of high-precision bearings (8) is 2.

6. The coaxiality fixture for assembling a turbojet engine according to claim 3, characterized in that: The high-precision bearing guide (9) is tapered.

7. The coaxiality fixture for assembling a turbojet engine according to claim 1, characterized in that: The concentricity of the recess (5) and the coaxiality fixture is ≤0.02mm.

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