Spiral strake device for turbine engine inlet passage

Abstract

The utility model relates to turbine engine technical field especially is related to a spiral guide grid device of turbine engine air inlet channel, including setting in turbine engine ontology one end's air inlet channel ontology, is equipped with spiral guide structure on air inlet channel ontology, spiral guide structure includes annular mounting bracket fixedly installed on the inner wall of air inlet channel ontology, the inside of annular mounting bracket is equipped with outer ring structure, the inside of outer ring structure is equipped with axle, and a plurality of spiral guide vanes are equipped between outer ring structure and axle. The utility model discloses the setting of spiral guide structure, sets up the spiral angle distribution between a plurality of spiral guide vanes and axle, carries out spiral formula guide to the airflow in air inlet channel ontology, effectively breaks up the vortex in airflow, adjusts the peripheral velocity and axial velocity distribution of airflow, makes airflow enter turbine engine with more uniform flow rate and direction, avoids local airflow disorder, and significantly improves turbine engine's air intake quality.

Description

Technical Field

[0001] This utility model relates to a turbine engine, and more particularly to a spiral guide grid device for the intake duct of a turbine engine, belonging to the field of turbine engine technology. Background Technology

[0002] Turbine engines are core power units in aviation, aerospace, marine, and industrial power fields. The intake quality of their intake system directly affects the engine's efficiency, stability, and service life. As a key component of the intake system, the intake duct's main function is to efficiently introduce outside air into the engine and perform preliminary air rectification to meet the compressor's requirements for intake airflow uniformity, stability, and flow direction.

[0003] To improve the quality of intake airflow, a flow guiding structure is usually installed in the intake duct. Existing turbine engine intake ducts typically use inline grids or simple arc grid structures for airflow rectification. Straight blade flow guiding grids can only perform simple airflow rectification and have limited ability to adjust circumferential vortices and axial velocity gradients in the airflow, making it difficult to achieve fine airflow guidance. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a spiral guide grid device for the intake duct of a turbine engine.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A spiral guide grid device for a turbine engine intake duct includes a turbine engine body, an intake duct body at one end of the turbine engine body, a spiral guide structure on the intake duct body, and an annular mounting bracket fixedly installed on the inner wall of the intake duct body. The annular mounting bracket has an outer ring structure inside, and a shaft is provided inside the outer ring structure. A plurality of spiral guide blades are provided on the shaft between the outer ring structure and the shaft. A plurality of grooves are formed on the shaft, and a motor connected to the spiral guide blades is fixedly installed in each groove. The inner end of the spiral guide blade is connected to the output end of the motor.

[0006] Furthermore, a cover plate is provided on the outer side of the shaft, a screw is fixedly installed on the cover plate, and a threaded groove is opened on the surface of the shaft. The cover plate is set on the shaft through the screw and the threaded groove.

[0007] Furthermore, the surface of the spiral guide vane is provided with a drag-reducing coating, which is a polytetrafluoroethylene coating.

[0008] Furthermore, a sealing gasket is provided on the inner wall of the annular mounting bracket, and a sealing groove is provided on the outer wall of the outer ring structure.

[0009] Furthermore, multiple fixing frames are uniformly fixedly arranged on the surface of the air intake body, and multiple fixing rods that are adapted to the inner diameter of the fixing frames are uniformly fixedly installed at one end of the outer ring structure.

[0010] Furthermore, one end of the fixing frame is provided with a bolt, and the bolt and the fixing rod are connected by a thread; preferably, the bolt is provided with a rubber ring, and the surface of the bolt is provided with a waterproof coating, which is an epoxy resin coating, used to isolate corrosive media.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention relates to a spiral guide grid device for a turbine engine intake duct. By setting a spiral guide structure, several spiral guide blades are arranged in a spiral angle distribution between the outer ring structure and the shaft, replacing the commonly used inline structure. This spiral guides the airflow within the intake duct body, effectively breaking up eddies in the airflow, adjusting the circumferential and axial velocity distribution of the airflow, and allowing the airflow to enter the turbine engine with a more uniform flow rate and direction. This avoids local airflow turbulence and significantly improves the intake quality of the turbine engine. At the same time, the evenly distributed spiral guide blades ensure the consistency of airflow guidance in the circumferential direction, avoiding local airflow turbulence. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the separation structure of the air intake body, the annular mounting bracket, and the spiral guide vanes of this utility model. Figure 3 This is a schematic diagram of the cover plate and screw structure of this utility model; Figure 4 This is a schematic diagram of the groove and motor structure of this utility model; Figure 5 This is a cross-sectional view of the fixed frame structure of this utility model.

[0013] In the diagram: 1. Turbine engine body; 2. Intake duct body; 3. Spiral guide structure; 4. Annular mounting bracket; 5. Outer ring structure; 6. Shaft; 7. Spiral guide blade; 8. Groove; 9. Motor; 10. Cover plate; 11. Screw; 12. Threaded groove; 13. Sealing gasket; 14. Sealing groove; 15. Fixing frame; 16. Fixing rod; 17. Bolt; 18. Rubber ring. Detailed Implementation

[0014] The technical solution of this utility model will be further described in a non-limiting manner below with reference to the accompanying drawings and specific embodiments.

[0015] like Figures 1-5 As shown, the spiral guide grid device for the turbine engine intake duct provided in this embodiment includes an intake duct body 2 disposed at one end of the turbine engine body 1. The intake duct body 2 is provided with a spiral guide structure 3. The spiral guide structure 3 includes an annular mounting bracket 4 fixedly installed on the inner wall of the intake duct body 2. The annular mounting bracket 4 is provided with an outer ring structure 5 inside. The outer ring structure 5 is provided with a shaft 6 inside. The shaft 6 is provided with a plurality of spiral guide blades 7 located between the outer ring structure 5 and the shaft 6. The shaft 6 is provided with a plurality of grooves 8. A motor 9 connected to the spiral guide blades 7 is fixedly installed in the grooves 8. The inner end of the spiral guide blades 7 is connected to the output end of the motor 9.

[0016] When the above structure is in use, by setting the spiral guide structure 3, several spiral guide blades 7 are arranged in a spiral angle distribution between the outer ring structure 5 and the shaft 6, which can spirally guide the airflow in the intake body 2, effectively break up the eddies in the airflow, adjust the circumferential velocity and axial velocity distribution of the airflow, and make the airflow enter the turbine engine with a more uniform flow speed and direction, significantly improving the intake quality of the turbine engine. At the same time, the evenly distributed several spiral guide blades 7 can ensure the consistency of airflow guidance in the circumferential direction and avoid local airflow turbulence. After connecting the motor 9 to the external PLC controller and power supply, the motor 9 can drive the spiral guide vane 7 to rotate, thereby adjusting the angle of the spiral guide vane 7 to adjust the intake parameters under different operating conditions and improve the performance of the turbine engine body 1.

[0017] Specifically, such as Figure 2 As shown, a cover plate 10 is provided on the outer side of the shaft 6, and a screw 11 is fixedly installed on the cover plate 10. A threaded groove 12 matching the screw 11 is opened on the surface of the shaft 6. The cover plate 10 is set on the shaft 6 through the screw 11 and the threaded groove 12. The cover plate 10 is provided on the outer side of the shaft 6 to cover the groove 8 and to enclose the motor 9 inside the groove 8 for protection. The cover plate 10, which is threadedly connected to the screw 11 and the threaded groove 12, provides tight and stable support and also facilitates the disassembly and assembly of the cover plate 10.

[0018] like Figure 3 As shown, the surface of the spiral guide vane 7 is provided with a drag-reducing coating, which is a polytetrafluoroethylene coating; the drag-reducing coating can significantly reduce the frictional resistance and shape resistance when the airflow passes through, thereby reducing intake loss.

[0019] The inner wall of the annular mounting bracket 4 is provided with a sealing gasket 13, and the outer wall of the outer ring structure 5 is provided with a sealing groove 14. After the outer ring structure 5 is installed into the interior of the annular mounting bracket 4, the sealing gasket 13 and the sealing groove 14 are tightly fitted to seal the gap between the annular mounting bracket 4 and the outer ring structure 5, so as to prevent airflow from passing through the gap and disturbing the flow direction of the airflow.

[0020] Multiple fixing frames 15 are uniformly fixed on the surface of the air intake body 2. Multiple fixing rods 16 that are adapted to the inner diameter of the fixing frame 15 are uniformly fixed on one end of the outer ring structure 5. One end of the fixing frame 15 is provided with a bolt 17, and is threadedly connected to the fixing rod 16 through the bolt 17. A rubber ring 18 is provided on the bolt 17. The fixed frame 15, fixed rod 16, bolt 17, and rubber ring 18 are designed to fix the outer ring structure 5, thereby improving its operational stability within the annular mounting frame 4. The outer ring structure 5 is installed in the annular mounting frame 4 by the connection and positioning support of the fixed frame 15 and fixed rod 16. The bolt 17 is used to fix the fixed rod 16 to the fixed frame 15, thereby fixing the outer ring structure 5 and improving the installation stability of the outer ring structure 5. The rubber ring 18 helps to reduce the vibration experienced by the bolt 17.

[0021] The surface of bolt 17 is provided with a waterproof coating, which is an epoxy resin coating used to isolate corrosive media. After the epoxy resin coating is cured on bolt 17, it forms a continuous non-porous protective film that can isolate bolt 17 from contact with external corrosive media and prevent bolt 17 from being corroded.

[0022] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A spiral guide grid device for a turbine engine intake duct, comprising an intake duct body (2) disposed at one end of a turbine engine body (1), characterized in that: The intake duct body (2) is provided with a spiral flow guiding structure (3); The spiral guide structure (3) includes an annular mounting bracket (4) fixedly installed on the inner wall of the air intake body (2). The annular mounting bracket (4) has an outer ring structure (5) inside. The outer ring structure (5) has a shaft (6) inside. The shaft (6) has several spiral guide blades (7) located between the outer ring structure (5) and the shaft (6). The shaft (6) has several grooves (8) opened on it. A motor (9) connected to the spiral guide blades (7) is fixedly installed in the grooves (8).

2. The spiral guide grid device for the turbine engine intake duct according to claim 1, characterized in that: The outer side of the shaft (6) is provided with a cover plate (10).

3. The spiral guide grid device for the turbine engine intake duct according to claim 2, characterized in that: The surface of the spiral guide vane (7) is provided with a drag-reducing coating, which is a polytetrafluoroethylene coating.

4. The spiral guide grid device for the turbine engine intake duct according to claim 1, characterized in that: A sealing gasket (13) is provided on the inner wall of the annular mounting bracket (4), and a sealing groove (14) is provided on the outer wall of the outer ring structure (5).

5. The spiral guide grid device for the turbine engine intake duct according to claim 1, characterized in that: The surface of the air intake body (2) is uniformly fixed with multiple fixing frames (15), and one end of the outer ring structure (5) is uniformly fixed with multiple fixing rods (16) that are adapted to the inner diameter of the fixing frames (15).

6. The spiral guide grid device for the turbine engine intake duct according to claim 5, characterized in that: One end of the fixed frame (15) is provided with a bolt (17), and is threadedly connected to the fixed rod (16) by the bolt (17).

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