Aero-engine high-pressure compressor rotor blade locking block installation tool

Abstract

The utility model discloses an aero-engine high-pressure compressor rotor blade locking piece installation tool which is composed of a lengthened plum blossom screwdriver head, an internal thread connector, an outer supporting connecting rod, an inner driving shaft and a rotating hand shaft, and the front end of the lengthened plum blossom screwdriver head is matched with an open groove in a high-pressure compressor rotor blade locking piece screw nut. The rear end of the lengthened plum bit is connected with the front end of the inner driving shaft, the rear end of the inner driving shaft is connected with the rotating hand shaft, and the front end of the internal thread connector is provided with an internal thread matched with an external thread of a high-pressure compressor rotor blade locking block screw. The rear end of the internal thread connector is connected with the front end of the external supporting connecting rod, and the internal thread connector and the external supporting connecting rod are integrally and rotatably arranged on the internal driving shaft in a sleeving mode and can slide along the internal driving shaft. In the screwing process, the blade locking blocks can be kept in a stretched state at the same time, so that the blade locking blocks are completely located in the rotor disc locking grooves and do not retreat, and therefore the situation that the rotor disc is damaged due to the fact that the locking blocks retreat in the rotor disc is avoided.

Description

Technical Field

[0001] The utility model relates to a maintenance tool for an aero-engine, in particular to an installation tool for a locking block of a high-pressure compressor rotor blade of an aero-engine. Background Art

[0002] At present, the tightening and loosening of the locking block of the high-pressure compressor rotor blade of a certain type of aero-engine is completed by using a simple tool provided in the original equipment manufacturer's manual in cooperation with a general tool.

[0003] However, this tool has the following defects:

[0004] ⑴ The structural design of this tool is relatively simple and it needs to be used in cooperation with a general tool.

[0005] ⑵ When using this tool to tighten the locking block, it cannot ensure that the inner wall of the blade locking block is located at the working surface position of the compressor rotor disk, and it is easy to cause damage to the compressor rotor disk by the inner wall of the high-pressure compressor rotor blade locking block. Content of the Utility Model

[0006] The purpose of the utility model is to provide an installation tool for a locking block of a high-pressure compressor rotor blade of an aero-engine, which has the advantages of simple structure, low cost, convenient use and can avoid damaging the compressor rotor disk.

[0007] The purpose of the utility model is realized by the following technical measures: an installation tool for a locking block of a high-pressure compressor rotor blade of an aero-engine, characterized in that it is composed of an extended socket head, an internal thread connector, an external support connecting rod, an internal drive shaft and a rotating hand shaft. The front end of the extended socket head is adapted to the slot on the nut of the screw of the high-pressure compressor rotor blade locking block. The rear end of the extended socket head is connected to the front end of the internal drive shaft. The rear end of the internal drive shaft is connected to the rotating hand shaft. The front end of the internal thread connector has an internal thread adapted to the external thread of the screw of the high-pressure compressor rotor blade locking block. The rear end of the internal thread connector is connected to the front end of the external support connecting rod and the whole is rotatably sleeved on the internal drive shaft and can slide along the internal drive shaft.

[0008] During the tightening process of the utility model, the blade locking block can be kept in a tensile state at the same time so that it is completely located in the rotor disk locking groove without withdrawing, thereby avoiding damage to the rotor disk caused by the backward movement of the locking block in the rotor disk. The utility model has a simple structure, low cost, can be used independently without cooperation with a general tool, is convenient to use, and is suitable for wide popularization and use.

[0009] The internal thread connector of the utility model is composed of two concentric hollow cylinders with different diameters, the front is small and the rear is large. Since the gap between adjacent blades is small, reducing the diameter of the front section of the internal thread connector can avoid frictional damage to the blades when using this tooling.

[0010] The lengthened plum blossom bit of the present utility model is made of S2 steel to ensure sufficient rigidity and hardness. The internal thread connecting head, the external support connecting rod, the internal driving shaft and the rotating hand shaft are made of SUS304 stainless steel, which has strong corrosion resistance and strong wear resistance.

[0011] The internal thread connecting head of the present utility model is in threaded connection with the external support connecting rod.

[0012] The external support connecting rod of the present utility model is composed of a hollow column and a boss provided at the rear end of the hollow column with a central hole. The front end of the hollow column has an internal thread, and the rear end of the internal thread connecting head has a threaded column, and the threaded column is screwed onto the internal thread of the hollow column.

[0013] The rotating hand shaft of the present utility model is a column, and the rear end of the internal driving shaft passes through the rotating hand shaft and is fixed.

[0014] Compared with the prior art, the present utility model has the following remarkable effects:

[0015] ⑴ During the tightening process of the present utility model, the blade lock block can be kept in a tensile state at the same time so that it is completely located in the rotor disk lock groove and does not withdraw, thereby avoiding damage to the rotor disk caused by the backward movement of the lock block in the rotor disk.

[0016] ⑵ The structure of the present utility model is simple and the cost is low. It can be used independently without being used in cooperation with a general tool, and is convenient to use, and is suitable for wide promotion and use. Description of the Drawings

[0017] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 is a top view of the present utility model;

[0020] Figure 3 is a perspective structural schematic diagram of the internal thread connecting head;

[0021] Figure 4 is a perspective structural schematic diagram of the external support connecting rod;

[0022] Figure 5 is a perspective structural schematic diagram of the rotating hand shaft;

[0023] Figure 6 is a structural schematic diagram of the present utility model during use.

[0024] In the figure: 1 - Extended plum blossom bit, 2 - Internal thread connector, 21 - Thread post, 3 - External support connecting rod, 31 - Hollow column, 32 - Boss, 4 - Internal drive shaft, 5 - Rotating hand shaft, 6 - High-pressure compressor rotor blade lock block, 7 - High-pressure compressor rotor disk. Detailed implementation manners

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0026] As Figures 1 to 6 shown, it is an installation tool for a high-pressure compressor rotor blade lock block of the present invention, which is composed of an extended plum blossom bit 1, an internal thread connector 2, an external support connecting rod 3, an internal drive shaft 4 and a rotating hand shaft 5. The front end of the extended plum blossom bit 1 is adapted to the slot on the screw nut of the high-pressure compressor rotor blade lock block 6. The rear end of the extended plum blossom bit 1 is connected to the front end of the internal drive shaft 4, and the rear end of the internal drive shaft 4 is connected to the rotating hand shaft 5. By rotating the rotating hand shaft 5, the extended plum blossom bit 1 can be driven to rotate to achieve the purpose of tightening the rotor blade lock block. The front end of the internal thread connector 2 has an internal thread adapted to the external thread of the screw of the high-pressure compressor rotor blade lock block 6. The rear end of the internal thread connector 2 is threadedly connected to the front end of the external support connecting rod 3 and can be rotatably sleeved on the internal drive shaft 4 and can slide along the internal drive shaft 4.

[0027] Since the distance between adjacent blades of the high-pressure compressor rotor is relatively small, in order to avoid friction damage to the blade 8 when using this tool, the internal thread connector 2 is composed of two concentric hollow cylinders with different diameters, smaller at the front and larger at the rear. See Figure 1 .

[0028] See Figure 3 , Figure 4 . The external support connecting rod 3 is composed of a hollow column 31 and a boss 32 provided at the rear end of the hollow column 31 with a central hole. The front end of the hollow column 31 has an internal thread, and the rear end of the internal thread connector 2 has a thread post 21. The thread post 21 is screwed into the internal thread of the hollow column 31, thereby realizing the threaded connection between the internal thread connector 2 and the external support connecting rod 3.

[0029] See Figure 5 . The rotating hand shaft 5 is a cylinder, and the rear end of the internal drive shaft 4 passes through the rotating hand shaft 5 and is fixed, thereby realizing the connection between the internal drive shaft 4 and the rotating hand shaft 5.

[0030] The lengthened socket head 1 is the most important working component of this tooling. The material is S2 steel, which can ensure sufficient rigidity and hardness. The materials of other components are all SUS304 stainless steel, which has strong corrosion resistance and strong wear resistance.

[0031] The using process of this utility model is as follows: When in use, install the lengthened socket head 1 in the slot of the lock block screw nut, then slide the internal thread connector 2 together with the outer support connecting rod 3 forward, and rotate to connect the internal thread at the front end of the internal thread connector 2 with the external thread of the lock block screw. Then slowly tighten and rotate the hand shaft 5. During the tightening process, the operator synchronously applies a suitable outward pulling force to the outer support connecting rod 3, and always keeps the high-pressure compressor rotor blade lock block 6 in a tensile state so that it is completely in the rotor disc lock groove and does not withdraw, thereby avoiding damage to the rotor disc caused by the lock block retreating in the rotor disc.

[0032] This utility model is an installation tooling for the 6th to 10th stage rotor blade lock blocks of an aero-engine high-pressure compressor. In order to prevent unexpected damage caused by abnormal contact between the mating surfaces of the high-pressure compressor rotor blade lock block 6 and the high-pressure compressor rotor disc 7 during the installation and tightening process, the external thread connection between the internal thread joint of this utility model and the lock block screw is utilized to ensure that the high-pressure compressor rotor blade lock block is completely in the rotor disc lock groove during the tightening process, thereby avoiding damage to the high-pressure compressor rotor disc caused by the lock block retreating in the rotor disc.

[0033] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An installation tooling for a locking block of a high-pressure compressor rotor blade of an aero-engine, characterized in that: It consists of an extended plum blossom bit, an internal thread connector, an external support connecting rod, an internal drive shaft and a rotating hand shaft. The front end of the extended plum blossom bit is adapted to the slot on the nut of the high-pressure compressor rotor blade locking block screw, the rear end of the extended plum blossom bit is connected to the front end of the internal drive shaft, the rear end of the internal drive shaft is connected to the rotating hand shaft, the front end of the internal thread connector has an internal thread adapted to the external thread of the high-pressure compressor rotor blade locking block screw, the rear end of the internal thread connector is connected to the front end of the external support connecting rod and the whole can be rotatably sleeved on the internal drive shaft and can slide along the internal drive shaft.

2. The installation tooling for the locking block of the high-pressure compressor rotor blade of an aero-engine according to claim 1, characterized in that: The internal thread connector is composed of two concentric hollow cylinders with different diameters, the front being smaller and the back being larger.

3. The installation tooling for the locking block of the high-pressure compressor rotor blade of an aeroengine according to claim 2, wherein: The internal thread connector is threadedly connected to the external support connecting rod.

4. The installation tooling for the locking block of the high-pressure compressor rotor blade of an aero-engine according to claim 3, characterized in that: The external support connecting rod consists of a hollow column and a boss with a center hole arranged at the rear end of the hollow column. The front end of the hollow column has an internal thread, and the rear end of the internal thread connector has a threaded column, which is screwed onto the internal thread of the hollow column.

5. The installation tooling for the locking block of the high-pressure compressor rotor blade of an aeroengine according to claim 4, characterized in that: The rotating hand shaft is a cylinder, and the rear end of the inner driving shaft passes through the rotating hand shaft and is fixed.

6. The installation tooling for the locking block of the high-pressure compressor rotor blade of an aeroengine according to claim 5, characterized in that: The extended plum blossom screwdriver bit is made of S2 steel, and the internal thread connector, external support connecting rod, internal drive shaft and rotating hand shaft are made of SUS304 stainless steel.

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