Engine fan blade group

Abstract

The utility model belongs to the technical field of engine fans, and particularly relates to an engine fan blade set which comprises a driving main shaft. The outer side of the middle of the driving main shaft is slidably connected with a fan connecting ring. A fan blade main body is fixedly connected to the outer side of the fan connecting ring; a limiting pin is fixedly connected to the outer side of the driving main shaft close to the fan connecting ring; a limiting groove is formed in the fan connecting ring; due to the fact that the working environment of an engine fan blade is extremely severe, the engine fan blade needs to be disassembled to be overhauled and replaced, but the disassembling steps are cumbersome and complex, the disassembling time can be prolonged, and the time cost is increased, the fan connecting ring only needs to be fixed to the outer side of the driving main shaft through the threaded barrel, and then limiting is conducted through the limiting pin and the limiting groove; therefore, the fan connecting ring is more stable when rotating along with the driving main shaft, the dismounting step is simplified, the stability is improved, and the time cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine fan, specifically a kind of engine fan blade group. BACKGROUND

[0002] Engine is a kind of device with energy conversion function, mainly by converting fuel or some other energy into mechanical energy, its working principle can be roughly summarized as four strokes of intake, compression, work and exhaust, is as one of the important power sources of modern industrial society.

[0003] Engine fan blade is usually composed of fan blade, wheel disc and structural member connecting them, fan blade is the most important component in fan blade group, responsible for generating airflow, usually made of high-strength, high-temperature-resistant, corrosion-resistant materials, such as titanium alloy, carbon fiber composite materials, etc.

[0004] In prior art, engine fan blade needs to be overhauled and replaced by disassembling due to extremely harsh working environment, but the disassembling procedure is tedious and complex, which increases disassembling time and time cost, therefore, a kind of engine fan blade group is proposed for the above problems. INVENTION CONTENTS

[0005] In order to make up for the deficiencies of prior art and solve at least one technical problem proposed in background art, the utility model provides a kind of engine fan blade group.

[0006] The technical scheme adopted by the utility model to solve its technical problems is: the utility model discloses a kind of engine fan blade group, including driving main shaft, the outer side of the middle part of driving main shaft is slidably connected with fan connecting ring, the outer side of fan connecting ring is fixedly connected with fan blade main body, the outer side of driving main shaft is fixedly connected with limit pin close to fan connecting ring, the inner part of fan connecting ring is provided with limit slot, the limit pin is slidably connected with limit slot, the outer side of the top of driving main shaft is equipped with screw groove, the outer side of screw groove is threadedly connected with threaded cylinder.

[0007] Preferably, the one end of the fan blade main body away from the fan connecting ring is fixedly connected with connecting column, the outer side of the fan blade main body is equipped with reinforcing ring, the inner part of the reinforcing ring is provided with multiple groups of sliding grooves, the connecting column is installed in the sliding groove, the inner part of the reinforcing ring is threadedly connected with plum-blossom screw.

[0008] Preferably, the inner part of the threaded cylinder is fixedly connected with spring column, the telescopic end of the spring column is fixedly connected with pressing plate, the pressing plate slides in the inner part of the spring column, the top of the fan connecting ring is provided with circular groove, the circular groove is slidably connected with the pressing plate.

[0009] Preferably, the top of the threaded cylinder is fixedly connected with fixed ring.

[0010] Preferably, a keyway is provided in the middle of the drive spindle, and the keyway is far away from the threaded groove.

[0011] Preferably, a shim is fixedly connected to the middle of the outer side of the drive spindle, and the shim is close to the limiting pin.

[0012] Preferably, the end of the drive spindle away from the threaded groove has a chamfer.

[0013] The advantages of this utility model are:

[0014] The present invention relates to an engine fan blade assembly. Engine fan blades, due to their extremely harsh working environment, require disassembly for inspection and replacement. However, the disassembly process is cumbersome and complex, increasing disassembly time and costs. Therefore, this invention simplifies the disassembly process by fixing the fan connecting ring to the outside of the drive shaft using a threaded cylinder, and then using a limiting pin and a limiting groove for positioning. This makes the fan connecting ring more stable when rotating with the drive shaft, thus simplifying the disassembly process, increasing stability, and reducing time costs.

[0015] The engine fan blade assembly described in this utility model requires the fan blade body to rotate at high speed during the operation of the device. Because the outermost stroke is larger and the rotation speed is faster, it needs to withstand greater forces and is prone to deformation and twisting. Therefore, multiple fan blade bodies are connected by reinforcing rings to reduce the possibility of deformation and twisting of the fan blade body under high-speed rotation. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0017] In the attached diagram:

[0018] Figure 1 This is a three-dimensional structural diagram of the drive spindle in this utility model;

[0019] Figure 2 This is a three-dimensional cross-sectional view of the fan connecting ring in this utility model;

[0020] Figure 3 This is a schematic diagram of the threaded cylinder structure in this utility model;

[0021] Figure 4 This is a schematic diagram of the main structure of the fan blade in this utility model;

[0022] Figure 5 for Figure 2 Enlarged view of point A;

[0023] Figure 6 forFigure 4 Enlarged view of point B.

[0024] In the diagram: 1. Drive spindle; 11. Fan connecting ring; 12. Fan blade body; 13. Threaded cylinder; 14. Threaded groove; 15. Limit pin; 16. Limit groove; 2. Connecting column; 21. Slide groove; 22. Reinforcing ring; 23. Torx screw; 3. Spring column; 31. Pressure plate; 32. Circular groove; 4. Fixing ring; 5. Keyway; 6. Washer; 7. Chamfer. Detailed Implementation

[0025] 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.

[0026] like Figures 1-6 As shown, an engine fan blade assembly includes a drive shaft 1. A fan connecting ring 11 is slidably connected to the outer side of the middle of the drive shaft 1. A fan blade body 12 is fixedly connected to the outer side of the fan connecting ring 11. A limiting pin 15 is fixedly connected to the outer side of the drive shaft 1 near the fan connecting ring 11. A limiting groove 16 is formed inside the fan connecting ring 11. The limiting pin 15 is slidably connected to the limiting groove 16. A threaded groove 14 is provided on the top of the outer side of the drive shaft 1. A threaded cylinder 13 is threadedly connected to the outer side of the threaded groove 14. During operation, the fan blade body 12 is first installed on the outer side of the fan connecting ring 11, and then the fan connecting ring 11 is slidably installed on the outer side of the drive shaft 1. The limiting groove 16 inside the fan connecting ring 11 and the limiting groove 16 are slidably connected to the fan connecting ring 11. The fan connecting ring 11 is connected to the drive spindle 1 by matching the limiting pin 15 on the outside of the drive spindle 1. Then, the threaded cylinder 13 is installed on one end of the drive spindle 1 by rotation and is fixed to the fan connecting ring 11 by cooperating with the threaded groove 14. In this step, the engine fan blade needs to be disassembled for inspection and replacement due to the extremely harsh working environment. However, the disassembly steps are cumbersome and complicated, which will increase the disassembly time and time cost. Therefore, it is only necessary to fix the fan connecting ring 11 to the outside of the drive spindle 1 by the threaded cylinder 13, and then limit it by the limiting pin 15 and the limiting groove 16. This makes the fan connecting ring 11 more stable when it rotates with the drive spindle 1, which simplifies the disassembly steps, increases stability, and reduces time cost.

[0027] like Figures 1-2 , Figure 4 , Figure 6As shown, a connecting post 2 is fixedly connected to the end of the fan blade body 12 away from the fan connecting ring 11. A reinforcing ring 22 is provided on the outer side of the fan blade body 12. Multiple sets of sliding grooves 21 are opened inside the reinforcing ring 22. The connecting post 2 is installed inside the sliding groove 21. A Torx screw 23 is threaded inside the reinforcing ring 22. During operation, the connecting post 2 is first installed at one end of the fan blade body 12. Then, the sliding groove 21 inside the reinforcing ring 22 is matched with the connecting post 2. The Torx screw 23 is used to fix the connecting post 2 and the reinforcing ring 22. During the operation of the device, the fan blade body 12 needs to rotate at high speed. Because the outermost stroke is larger and the rotation speed is faster, it needs to withstand greater force and is prone to deformation and twisting. Therefore, the reinforcing ring 22 is used to connect multiple sets of fan blade bodies 12 to reduce the possibility of deformation and twisting of the fan blade body 12 under high-speed rotation.

[0028] like Figure 3 As shown, a spring column 3 is fixedly connected inside the threaded cylinder 13, and a pressure plate 31 is fixedly connected to the telescopic end of the spring column 3. The pressure plate 31 slides inside the spring column 3. A circular groove 32 is opened on the top of the fan connecting ring 11. The circular groove 32 is slidably connected to the pressure plate 31. During operation, when the threaded cylinder 13 is raised and rotated to be installed outside the drive spindle 1, as the bottom of the threaded cylinder 13 gradually approaches the fan connecting ring 11, the pressure plate 31 first contacts the circular groove 32. Then, the pressure plate 31 squeezes and contracts the spring column 3. During the operation of the device, the engine drive device may generate vibration, which may cause the threaded cylinder 13 to loosen. Therefore, through the compression of the spring column 3, after installation, an outward force is applied to the threaded cylinder 13, making the thread inside the threaded cylinder 13 more tightly connected to the thread groove 14, reducing the possibility of the threaded cylinder 13 loosening due to engine vibration.

[0029] like Figures 1-2 As shown, a fixing ring 4 is fixedly connected to the top of the threaded cylinder 13. During operation, when the threaded cylinder 13 is installed on the outside of the fan connecting ring 11, the assist device is connected to the fixing ring 4. Then, by rotating the fixing ring 4, the threaded cylinder 13 can be disassembled. This step often requires a large force to assist in the installation during mechanical assembly in order to increase the stability of the connection. Therefore, the use of the fixing ring 4 makes the disassembly of the threaded cylinder 13 more efficient.

[0030] like Figures 1-2 , Figure 5 As shown, a keyway 5 is provided in the middle of the drive spindle 1. The keyway 5 is far away from the threaded groove 14. When installing the drive spindle 1 during operation, the keyway 5 can be installed conveniently, and other structures can be firmly fixed to the outside of the drive spindle 1.

[0031] like Figure 2As shown, a shim 6 is fixedly connected to the middle of the outer side of the drive spindle 1. The shim 6 is close to the limiting pin 15. During operation, when the fan connecting ring 11 is installed on the outer side of the drive spindle 1, the shim 6 is located between the fan connecting ring 11 and the drive spindle 1. In this step, when the fan connecting ring 11 is fixed on the outer side of the drive spindle 1, the shim 6 increases the contact surface and protects the fan connecting ring 11.

[0032] like Figures 1-2 , Figure 5 As shown, the drive spindle 1 has a chamfer 7 at the end away from the threaded groove 14. The use of chamfer 7 can reduce installation damage and also enhance the compressive strength of the drive spindle 1.

[0033] The working principle is as follows: First, the fan blade body 12 is installed on the outside of the fan connecting ring 11. Then, the fan connecting ring 11 is slidably installed on the outside of the drive main shaft 1. The limiting groove 16 inside the fan connecting ring 11 matches the limiting pin 15 on the outside of the drive main shaft 1, realizing the connection between the fan connecting ring 11 and the drive main shaft 1. At this time, the threaded cylinder 13 is installed on one end of the drive main shaft 1 by rotation, and it cooperates with the threaded groove 14 to fix the fan connecting ring 11. Due to the extremely harsh working environment, the engine fan blade needs to be disassembled for inspection and replacement. However, the disassembly process is cumbersome and complicated, which will increase the disassembly time and time cost. Therefore, it is only necessary to fix the fan connecting ring 11 on the outside of the drive main shaft 1 by the threaded cylinder 13, and then fix it by the limiting pin. 15. The limiting groove 16 provides a limiting position, making the fan connecting ring 11 more stable when rotating with the drive spindle 1. This simplifies the disassembly process, increases stability, and reduces time costs. First, the connecting post 2 is installed at one end of the fan blade body 12. Then, the sliding groove 21 inside the reinforcing ring 22 mates with the connecting post 2, and the connecting post 2 and the reinforcing ring 22 are fixed together by the Torx screw 23. During the operation of the device, the fan blade body 12 needs to rotate at high speed. Because the outermost stroke is larger and the rotation speed is faster, it needs to withstand greater forces, making it prone to deformation and twisting. Therefore, the reinforcing ring 22 connects multiple sets of fan blade bodies 12, reducing the possibility of deformation and twisting of the fan blade body 12 under high-speed rotation. When the threaded cylinder 13 is lifted and rotated to be installed outside the drive spindle 1, as the bottom of the threaded cylinder 13 gradually approaches the fan connecting ring 11, the pressure plate 31 first contacts the circular groove 32, and then the pressure plate 31 compresses and contracts the spring column 3. During the operation of the device, vibration may occur due to the operation of the engine drive device, causing the threaded cylinder 13 to loosen. Therefore, through the compression of the spring column 3, an outward force is applied to the threaded cylinder 13 after installation, making the internal threads of the threaded cylinder 13 more tightly connected to the threaded groove 14, reducing the possibility of the threaded cylinder 13 loosening due to engine vibration. When installing the threaded cylinder 13 outside the fan connecting ring 11, the assist device is connected to the fixing ring 4, and then rotated... By rotating the retaining ring 4, the threaded cylinder 13 can be disassembled. This step often requires considerable force during mechanical assembly to increase the stability of the connection. Therefore, the use of the retaining ring 4 makes the disassembly of the threaded cylinder 13 more efficient. When installing the drive spindle 1, the keyway 5 facilitates installation and firmly fixes other structures to the outside of the drive spindle 1. When installing the fan connecting ring 11 on the outside of the drive spindle 1, the washer 6 is located between the fan connecting ring 11 and the drive spindle 1. In this step, when fixing the fan connecting ring 11 to the outside of the drive spindle 1, the washer 6 increases the contact surface and protects the fan connecting ring 11. The use of the chamfer 7 can reduce installation damage and also enhance the compressive strength of the drive spindle 1.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An engine fan blade assembly, comprising a drive shaft (1), characterized in that: A fan connecting ring (11) is slidably connected to the outer side of the middle part of the drive spindle (1). A fan blade body (12) is fixedly connected to the outer side of the fan connecting ring (11). A limit pin (15) is fixedly connected to the outer side of the drive spindle (1) near the fan connecting ring (11). A limit groove (16) is opened inside the fan connecting ring (11). The limit pin (15) is slidably connected to the limit groove (16). A threaded groove (14) is provided on the top of the outer side of the drive spindle (1). A threaded cylinder (13) is threadedly connected to the outer side of the threaded groove (14).

2. The engine fan blade assembly according to claim 1, characterized in that: The fan blade body (12) is fixedly connected to a connecting post (2) at the end away from the fan connecting ring (11). A reinforcing ring (22) is provided on the outside of the fan blade body (12). Multiple sets of sliding grooves (21) are opened inside the reinforcing ring (22). The connecting post (2) is installed inside the sliding groove (21). A Torx screw (23) is threaded inside the reinforcing ring (22).

3. The engine fan blade assembly according to claim 1, characterized in that: A spring column (3) is fixedly connected inside the threaded cylinder (13). A pressure plate (31) is fixedly connected to the telescopic end of the spring column (3). The pressure plate (31) slides inside the spring column (3). A circular groove (32) is opened on the top of the fan connecting ring (11). The circular groove (32) is slidably connected to the pressure plate (31).

4. The engine fan blade assembly according to claim 1, characterized in that: A retaining ring (4) is fixedly connected to the top of the threaded cylinder (13).

5. The engine fan blade assembly according to claim 1, characterized in that: The drive spindle (1) has a keyway (5) in the middle, and the keyway (5) is far away from the threaded groove (14).

6. The engine fan blade assembly according to claim 1, characterized in that: A shim (6) is fixedly connected to the middle of the outer side of the drive spindle (1), and the shim (6) is close to the limiting pin (15).

7. The engine fan blade assembly according to claim 1, characterized in that: The drive spindle (1) has a chamfer (7) at the end away from the threaded groove (14).

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