Aero-engine gear with high load

Abstract

The utility model discloses an aero-engine gear with high load, and relates to the technical field of aero-engine gears, the aero-engine gear comprises a web plate, a rigid spring and a gear body, the inner wall of the gear body is provided with a spring groove, the spring groove is internally provided with the rigid spring, the web plate and the gear body are internally provided with limiting holes, and the limiting holes are arranged in the web plate and the gear body. A fixing groove is formed in the web plate, a rivet penetrating through the gear body and the connecting flange and extending to the outer wall of the web plate is arranged in the fixing groove, an oil groove is formed in the outer wall of the web plate, a limiting groove is formed in the inner wall of the web plate, and the limiting groove is matched with the outer wall of the rigid spring. The device has the advantages that the web plate compresses elastic deformation of the rigid spring to absorb vibration energy, then torsional vibration breakage of the gear body is avoided, the limiting columns at the gear body can effectively limit, when the load is too large, the limiting columns can be matched with the kidney-shaped grooves to limit displacement, and overload protection is achieved.

Description

Technical Field

[0001] This utility model relates to the field of aero-engine gear technology, specifically aero-engine gears with high load capacity. Background Technology

[0002] The gear transmission system is a crucial component of the mechanical system of aircraft turbofan and turbojet engines (including the central drive, engine accessory housing, and aircraft accessory housing). The central drive is connected to the engine accessory housing via a central drive rod, and the engine accessory housing is connected to the aircraft accessory housing via a flexible shaft. During engine start-up, the starter motor, mounted on the aircraft accessory housing, transmits its output power to the engine's high-pressure rotor through the gear system, flexible shaft, and drive rod, thus starting the engine.

[0003] However, existing high-load aero-engine gears have the following problems during use: due to space constraints, traditional aero-engine gears cannot solve the problem of vibration fatigue damage when crankshaft torsion drives gear transmission, thus affecting engine functionality and reliability. In addition, engine gears require strong mechanical properties, but they are prone to significant wear after long-term use, which affects their normal operation. Utility Model Content

[0004] The purpose of this invention is to provide a high-load aero-engine gear to solve the related problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-load aero-engine gear, comprising a web, a rigid spring, and a gear body, characterized in that: a spring groove is formed on the inner wall of the gear body, and a rigid spring is disposed inside the spring groove; limit holes are formed inside both the web and the gear body; a fixing groove is formed inside the web, and a rivet extending through the gear body, a connecting flange, and to the outer wall of the web is disposed inside the fixing groove; an oil groove is formed on the outer wall of the web; a limit groove is formed on the inner wall of the web, and the limit groove is adapted to the outer wall of the rigid spring; the inner wall of the gear body... A waist-shaped groove is provided on one side near the spring groove, and a limiting post is provided inside the waist-shaped groove. The limiting post passes through two sets of web plates on both sides to the interior of the limiting hole. A connecting flange is fitted on the inner wall of the gear body, and the connecting flange has an installation hole that matches the limiting hole and fixing groove on the web plate. The front and rear end faces of the spring groove are acute angles that fit tightly against the rigid spring. A stop is provided on the inner wall of the gear body, and a spring washer for adjusting the axial clearance is placed inside the stop. An oil inlet is provided on the inner wall of the gear body. When a gap is generated between the web plate and the connecting flange, a lubrication channel is formed between the oil inlet and the oil groove.

[0006] The high-load aero-engine gear provided by this technical solution has multiple sound-absorbing cavities on the side of the web plate near the fixed groove, and sound-absorbing cotton is pasted on both ends of the inner wall of the sound-absorbing cavity.

[0007] The high-load aero-engine gear provided by this technical solution has a wear-resistant layer sprayed on the outer wall of the gear body.

[0008] The high-load aero-engine gear provided by this technical solution has a wear-resistant layer made of silicon carbide.

[0009] The high-load aero-engine gear provided by this technical solution has reinforcing ribs installed between the outer walls of the gear body tooth blocks, and the reinforcing ribs are H-shaped.

[0010] Compared with the prior art, this utility model provides an aircraft engine gear with high load capacity, which has the following beneficial effects:

[0011] 1. This utility model places a rigid spring directly into a spring groove, then inserts it into the gear body through a limiting post, and then rivets are riveted through the web, connecting flange, and gear body to form a whole. This structure is simple to install and has the advantages of the following: when power is transmitted, the crankshaft drives the connecting flange and web to rotate, and the web drives the gear body by compressing the rigid spring. This causes the elastic deformation of the rigid spring to be compressed by the web to absorb vibration energy, thereby preventing the gear body from torsional vibration and breakage. The limiting post at the gear body can effectively limit the movement. When the load is too large, the limiting post can cooperate with the waist groove to limit the displacement, which has the advantage of overload protection.

[0012] 2. This utility model can effectively increase the strength and rigidity by installing H-shaped reinforcing ribs at the gap position of the outer wall of the gear body, thereby increasing the mechanical properties of the gear body when it is engaged with the external tooth blocks. In addition, silicon carbide is sprayed on the outer wall of the gear body, which can increase the strength of the gear body. It has the advantages of high thermal conductivity, impact resistance, oxidation resistance and corrosion resistance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional exploded view of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 3 This is an enlarged structural schematic diagram of point A in the figure of this utility model;

[0016] Figure 4 This is a schematic diagram of the left sectional view of the present invention;

[0017] Figure 5 This is a three-dimensional structural diagram of the present invention.

[0018] In the diagram: 1. Web plate; 2. Limiting post; 3. Rigid spring; 4. Spring washer; 5. Gear body; 6. Connecting flange; 7. Rivet; 8. Spring groove; 9. Limiting hole; 10. Fixing groove; 11. Silencing cavity; 12. Limiting groove; 13. Wear-resistant layer; 14. Reinforcing rib; 15. Oil groove; 16. Oil inlet hole; 17. Waist-shaped groove. Detailed Implementation

[0019] 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.

[0020] Example 1, such as Figure 1-2As shown, this utility model provides a technical solution: a high-load aero-engine gear, including a web plate 1, a rigid spring 3, and a gear body 5. The inner wall of the gear body 5 has a spring groove 8, and a rigid spring 3 is installed inside the spring groove 8. The front and rear end faces of the spring groove 8 are acute angles, tightly fitting the rigid spring 3. Limiting holes 9 are provided inside both the web plate 1 and the gear body 5. A waist-shaped groove 17 is provided on the inner wall of the gear body 5 near the spring groove 8, and a limiting post 2 is installed inside the waist-shaped groove 17. The limiting post 2 penetrates two sets of web plates 1 to the inside of the limiting holes 9 on both sides. A fixing groove 10 is provided inside the web plate 1, and a rivet 7 is installed inside the fixing groove 10, penetrating the gear body 5, extending through the connecting flange 6 to the outer wall of the web plate 1. An oil inlet hole 16 is provided on the inner wall of the gear body 5. When a gap is created between the web plate 1 and the connecting flange 6, a lubrication channel is formed between the oil inlet hole 16 and the oil groove 15. A stop is provided on the inner wall of the gear body 5, and an adjustment mechanism is placed inside the stop. The axial clearance spring pad 4, the outer wall of the web 1 has an oil groove 15, the inner wall of the web 1 has a limiting groove 12, and the limiting groove 12 is adapted to the outer wall of the rigid spring 3. The inner wall of the gear body 5 is fitted with a connecting flange 6, and the connecting flange 6 has an installation hole adapted to the limiting hole 9 and the fixing groove 10 at the web 1. The rigid spring 3 is directly placed in the spring groove 8, and then inserted into the gear body 5 through the limiting post 2. Then the rivet 7 is inserted through the web 1, the connecting flange 6 and the limiting post 2. The gear body 5 is riveted into one piece. This structure is easy to install. When power is transmitted, the crankshaft drives the connecting flange 6 and the web plate 1 to rotate. The web plate 1 drives the gear body 5 by compressing the rigid spring 3. This causes the elastic deformation of the web plate 1 to compress the rigid spring 3 to absorb vibration energy, thereby preventing the gear body 5 from torsional vibration and breakage. The limiting post 2 at the gear body 5 can effectively limit the position by cooperating with the rivet 7. When the load is too large, the limiting post 2 can cooperate with the waist groove 17 to limit the displacement, which has the advantage of overload protection.

[0021] Example 2, as Figure 1-4 As shown, this utility model provides a technical solution: a high-load aero-engine gear, with multiple sound-absorbing cavities 11 opened on the side of the web plate 1 near the fixed groove 10, and sound-absorbing cotton is pasted at both ends of the sound-absorbing cavities 11. By opening the sound-absorbing cavities 11 at the web plate 1 and adding sound-absorbing cotton at the sound-absorbing cavities 11, when sound waves are incident into the interior of the sound-absorbing cavities 11, the sound-absorbing cavities 11 and the sound-absorbing cotton shell effectively block the sound transmission and achieve a sound absorption effect.

[0022] Example 3, as Figure 1-5As shown, this utility model provides a technical solution: a high-load aero-engine gear, including a gear body 5 with reinforcing ribs 14 installed between the outer walls of the tooth blocks, and the reinforcing ribs 14 are H-shaped. By installing H-shaped reinforcing ribs 14 in the gap position of the outer wall of the gear body 5, the strength and rigidity can be effectively increased, and the mechanical performance of the gear body 5 when it is engaged with the outer tooth blocks can be increased.

[0023] Example 4, as Figure 1-5 As shown, this utility model provides a technical solution: a high-load aero-engine gear, including a wear-resistant layer 13 sprayed on the outer wall of the gear body 5, and the wear-resistant layer 13 is made of silicon carbide. The spraying of silicon carbide on the outer wall of the gear body 5 can increase the strength of the gear body 5 and has the advantages of high thermal conductivity, impact resistance, oxidation resistance and corrosion resistance.

[0024] Working principle: First, the rigid spring 3 is placed directly in the spring groove 8. Then, it is inserted into the gear body 5 through the limiting post 2. Next, the rivet 7 is riveted through the web plate 1, connecting flange 6, and gear body 5 to form a whole. This structure is simple to install. When power is transmitted, the crankshaft drives the connecting flange 6 and web plate 1 to rotate. The web plate 1 compresses the rigid spring 3 and then drives the gear body 5, so that the elastic deformation of the rigid spring 3 is compressed by the web plate 1 to absorb vibration energy, thereby preventing the gear body 5 from torsional vibration and breakage. The limiting post 2 at the gear body 5 can effectively limit the load. When the load is too large, the limiting post 2 can... The waist-shaped groove 17, in conjunction with the limiting displacement, provides overload protection. The gear body 5 has a sound-absorbing cavity 11 opened at the web plate 1, and sound-absorbing cotton is added to the sound-absorbing cavity 11. When sound waves are incident into the sound-absorbing cavity 11, the sound-absorbing cavity 11 and the sound-absorbing cotton shell effectively block the sound transmission, achieving a sound absorption effect. Silicon carbide is sprayed on the outer wall of the gear body 5, which can increase the strength of the gear body 5 and has the advantages of high thermal conductivity, impact resistance, oxidation resistance and corrosion resistance.

[0025] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A high-load aircraft engine gear, comprising a web (1), a rigid spring (3), and a gear body (5), characterized in that: The inner wall of the gear body (5) is provided with a spring groove (8), and a rigid spring (3) is provided inside the spring groove (8). Limiting holes (9) are provided inside both the web plate (1) and the gear body (5). A fixing groove (10) is provided inside the web plate (1), and a rivet (7) is provided inside the fixing groove (10) that penetrates the gear body (5), the connecting flange (6) and extends to the outer wall of the web plate (1). An oil groove (15) is provided on the outer wall of the web plate (1). A limiting groove (12) is provided on the inner wall of the web plate (1), and the limiting groove (12) is adapted to the outer wall of the rigid spring (3). A waist-shaped groove (17) is provided on the inner wall of the gear body (5) near the spring groove (8), and the inner wall of the waist-shaped groove (17) is... The gear body (5) is provided with a limiting post (2), which penetrates two sets of web plates (1) to the inside of the limiting hole (9) on both sides. The inner wall of the gear body (5) is fitted with a connecting flange (6), and the connecting flange (6) has an installation hole that matches the limiting hole (9) and the fixing groove (10) at the web plate (1). The front and rear end faces of the spring groove (8) are acute angles that fit tightly with the rigid spring (3). The inner wall of the gear body (5) has a stop, and a spring pad (4) for adjusting the axial clearance is placed inside the stop. The inner wall of the gear body (5) has an oil inlet hole (16). When a gap is generated between the web plate (1) and the connecting flange (6), a lubrication channel is formed between the oil inlet hole (16) and the oil groove (15).

2. The high-load aero-engine gear according to claim 1, characterized in that: The web plate (1) has multiple sound-absorbing cavities (11) on the side near the fixing groove (10), and sound-absorbing cotton is pasted on both ends of the inner wall of the sound-absorbing cavity (11).

3. The high-load aero-engine gear according to claim 1, characterized in that: The outer wall of the gear body (5) is sprayed with a wear-resistant layer (13).

4. The high-load aero-engine gear according to claim 3, characterized in that: The wear-resistant layer (13) is made of silicon carbide.

5. The high-load aero-engine gear according to claim 1, characterized in that: The gear body (5) has reinforcing ribs (14) installed between the outer walls of the tooth blocks, and the reinforcing ribs (14) are H-shaped.

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