Flow guide device and working method thereof

Abstract

The invention belongs to the technical field of fluid directors, and particularly relates to a fluid director and a working method thereof.The fluid director comprises an outer shell, an inner fluid director shell and a fluid director stationary blade, the outer shell sleeves the inner fluid director shell, the fluid director stationary blade is arranged between the outer shell and the inner fluid director shell, the fluid director stationary blade is of a tetrahedral structure, and the left end face and the right end face of the fluid director stationary blade are both arranged to be planes; the left end face and the right end face of each flow guide static blade abut against the outer shell and the flow guide inner shell respectively, the flow guide inner shell is of a hollow cylinder structure, and the flow guide static blades are evenly arranged around the central axis of the flow guide inner shell. The relative angle of the two ends of the outer shell controls the convergence angle of airflow, the too small convergence angle can cause insufficient convergence, the too large convergence angle can cause pressure loss, when the angle range of the outer shell is 25-28 degrees, the airflow can be gradually converged in the outer shell, the convergence effect improves the axial component of air flowing, and the axial component of the airflow is reduced. Therefore, the airflow energy density is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of deflectors, and in particular relates to a deflector and a working method thereof. Background Art

[0002] A deflector is a device used to guide or control airflow, and is often used to optimize aerodynamic performance, improve efficiency, or improve operational safety. When used on a helicopter, it can effectively guide airflow, reduce the generation of vortices and turbulence, and distribute airflow paths through its own specific structure, reducing the impact of air resistance on the helicopter body.

[0003] Generally speaking, the core structure of the deflector is divided into three parts: the outer shell, the inner shell and the static blades. Each part plays a different role in the function of the deflector. The outer shell is responsible for the convergence of the overall airflow, supporting and protecting other structures, and adapting to external connections. It is mainly responsible for smoothly guiding the air in the environment to the internal flow channel. By designing its shape, it can effectively reduce fluid separation and vortex formation, ensuring that the airflow is evenly distributed inside the deflector. At the same time, the outer shell provides physical protection for the internal structure to prevent external impurities from damaging core components. The inner shell is responsible for stabilizing the core airflow, reducing flow interference, and serving as an internal skeleton support structure, playing a core support role. It is mainly used to form a central airflow channel and optimize the stability of the airflow in the mainstream area. It cooperates with the guide static blades to further refine the airflow path to ensure that the fluid is at high speed and in the main channel. The guide vanes are used to correct and rectify the direction of the core airflow, which directly affects the uniformity of the flow field and the aerodynamic efficiency. The guide vanes are mainly used to correct the direction and angle of the airflow so that it can match the aerodynamic components (such as tail rotors or ducted fans) more efficiently. They reduce the rotational component of the airflow and enhance the axial component of the airflow, thereby improving the stability of the flow field. At the same time, the guide vanes can decompose irregular airflow, reduce rotational turbulence and speed fluctuations, and form a uniform and stable outlet flow field. In the design of multi-blade arrangement, the number and shape of the blades directly determine the rectification effect.

[0004] In the prior art, the invention patent with publication number CN114269611A discloses a deflector for a diffuser of a gas generator, a diffuser-deflector assembly having such a deflector, a gas generator having such a diffuser-deflector assembly, a manufacturing method and an assembly method, wherein the deflector has a substantially tubular deflector base and a gas discharge device connected thereto, wherein the gas discharge device has a substantially rectangular base surface and two outflow areas on opposite side walls, so that the gas can flow out from the inside of the gas discharge device to the outside along the longitudinal axis of the tubular deflector base in substantially opposite directions; however, it does not disclose what kind of design the outer shell, the inner shell and the stationary blades should each be made to achieve their corresponding functions;

[0005] The invention patent with publication number CN116923709A discloses a deflector, a thrust reverser including the deflector, and an aircraft engine nacelle, wherein the deflector (e.g., a lateral deflector or a track deflector) is intended for an exhaust structure of a thrust reverser and comprises a deflector plate intended to act on an aerodynamic flow, the deflector plate having a concave upstream surface and a convex downstream surface, and an inlet end and an exhaust end, the deflector is equipped with a spoiler, the spoiler is rigidly connected to the exhaust end of the deflector plate and is arranged transversely relative to the deflector plate, the spoiler imparts special properties to the deflector to act on the aerodynamic flow, so as to enhance the performance of the thrust reverser including the deflector, but it does not disclose how to design a deflector including an outer shell, an inner shell, and stationary blades, so that each component cooperates to perform a deflection function;

[0006] To sum up, how to design a deflector so that its outer shell, inner shell and stationary blades can each guide the air in the environment smoothly to the internal flow channel, stabilize the core airflow, reduce flow interference, and at the same time serve as an internal skeleton support structure to play a core support role, as well as a role in correcting and rectifying the direction of the core airflow, and the structures work together to play a guiding role, has become a problem to be solved. Summary of the invention

[0007] The object of the present invention is to provide a deflector and a working method thereof to solve the above problems.

[0008] In order to achieve the above objectives, the following technical solutions are provided:

[0009] A flow guide comprises: an outer shell, an inner flow guide shell and flow guide static blades, wherein the outer shell is sleeved on the outside of the inner flow guide shell, the flow guide static blades are arranged between the outer shell and the inner flow guide shell, the flow guide static blades are of a tetrahedral structure, both left and right end surfaces thereof are configured as planes, the top and bottom ends of the front and rear end surfaces are arranged in contact with each other, the left and right end surfaces of the flow guide static blades are respectively in contact with the outer shell and the inner flow guide shell, the inner flow guide shell is of a hollow cylindrical structure, and the flow guide static blades are evenly arranged around the central axis of the inner flow guide shell.

[0010] Preferably, the outer shell and the guide inner shell are both integral structures, the outer shell is bent sequentially from one end to the other end, and the two ends of the outer shell are oriented in different directions, one end is oriented in the same direction as the central axis of the guide inner shell, and the other end has an angle with the direction of the central axis of the guide inner shell, and the angle range of the angle is 25-28°.

[0011] Preferably, a through hole is provided through the middle of the guide static blade, and a convex column is provided on one end face of the plane. The outer wall surface of the guide inner shell is evenly provided with recessed portions along its circumference, and the recessed portion is recessed in the direction of its axis. The size of the convex column matches that of the recessed portion, and the convex column is limited in the recessed portion. The guide static blade is bent toward its front end as a whole, and the relative bending angles at both ends of the guide static blade range from 17 to 20°.

[0012] Preferably, the convex columns are arranged on both sides of the top and bottom of one end surface of the guide vane, and the number of the recessed portions is the same as the number of the convex columns.

[0013] Preferably, the outer shell and the guide inner shell are both uniformly provided with through holes along their circumferences, and the number of through holes on the outer shell and the guide inner shell is the same as the number of guide vanes. The guide device also includes a connector, which can pass through the through holes on the outer shell, the guide vanes and the guide inner shell in sequence, so as to fix the outer shell, the guide vanes and the guide inner shell together.

[0014] Preferably, the flow guide inner shell includes an expanded diameter portion and a cylindrical portion, the expanded diameter portion is arranged at the top of the cylindrical portion, the expanded diameter portion extends outward from top to bottom along the expanded diameter portion at an extension angle, and then the expanded diameter portion is sequentially expanded from its top end downward.

[0015] Preferably, the extension angle of the expanded diameter portion increases from top to bottom, and the bottom of the expanded diameter portion is connected to the top of the cylindrical portion.

[0016] Preferably, the cylindrical portion is provided with a fixed number of first weight-reducing holes along its circumference, and the guide inner shell is also provided with a second weight-reducing hole, which is located between the expanded diameter portion and the cylindrical portion. The cylindrical portion is provided with a rectangular opening at the front end and a trapezoidal opening at the rear end. The rectangular opening is arranged from top to bottom through the front end surface of the cylindrical portion, and the expanded diameter portion is provided with an inverted trapezoidal opening, which is located above the rectangular opening. The two side walls of the expanded diameter portion at the inverted trapezoidal opening are fitted with the two side walls of the cylindrical portion at the rectangular opening, and the top corner point of the inverted trapezoidal opening is arranged in an arc shape.

[0017] Preferably, a base is also provided at the bottom end of the cylindrical portion, which is correspondingly arranged at the edges of the rectangular opening and the trapezoidal opening. A connecting hole is penetrated through the base, and the chord length of the plane end of the guide static blade ranges from 0.8 to 1.1 times the maximum distance between the left and right end surfaces.

[0018] The present invention also provides a working method of the above-mentioned flow guide, comprising the following steps:

[0019] S1: Install the deflector onto the high-speed fan through the connecting hole;

[0020] S2: Start the high-speed fan to blow the high-pressure gas into the deflector;

[0021] S3: Part of the high-pressure gas is blown out through the hollow part of the guide vane, and the rest of the high-pressure gas is blown out through the guide vane.

[0022] The beneficial effects of the present invention are:

[0023] 1. The relative angles at both ends of the outer shell in the present invention control the convergence angle of the airflow. A convergence angle that is too small will lead to insufficient convergence, and a convergence angle that is too large will lead to pressure loss. When the angle range of the outer shell is 25-

[0024] At 28°, the airflow gradually converges inside the outer shell. This convergence effect increases the axial component of the air flow, thereby increasing the airflow energy density.

[0025] 2. The tetrahedral shape of the guide vane and the bending angle range of 17-20° in the present invention can eliminate the uneven velocity distribution in the airflow, reduce the turbulence effect, and make the flow field at the outlet of the guide vane more stable. At the same time, the chord length of the flat end of the guide vane increases the control area of ​​the guide vane on the airflow, which cooperates with the width of the guide vane to further avoid turbulence.

[0026] 3. The inner shell of the present invention forms a stable flow channel through the design of the expanded diameter part and the cylindrical part, smoothes the airflow path, and reduces the speed mutation when the airflow enters the deflector; BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The structure of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 2 The structure of the present invention is shown in FIG. Figure 2 ;

[0029] Figure 3 It is a schematic diagram of the cooperation between the inner casing and the guide vanes;

[0030] Figure 4 Schematic diagram of the inner shell structure Figure 1 ;

[0031] Figure 5 Schematic diagram of the inner shell structure Figure 2 ;

[0032] Figure 6 It is a structural schematic diagram of the guide static blade;

[0033] In the figure:

[0034] 1- Outer shell;

[0035] 2-inner shell, 201-recessed portion, 202-enlarged diameter portion, 203-cylindrical portion, 204-first weight-reducing hole, 205-second weight-reducing hole, 206-rectangular opening, 207-trapezoidal opening, 208-inverted trapezoidal opening, 209-base, 210-connection hole;

[0036] 3- guide vane, 301- boss. DETAILED DESCRIPTION

[0037] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions of the schematic diagrams in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1-6 As shown, a guide vane comprises: an outer shell 1, an inner guide shell 2 and guide vanes 3, the outer shell 1 is sleeved on the outer side of the inner guide shell 2, the guide vanes 3 are arranged between the outer shell 1 and the inner guide shell 2, the guide vanes 3 are tetrahedral structures, both left and right end surfaces thereof are configured as planes, the top and bottom ends of the front and rear end surfaces are arranged in contact, the left and right end surfaces of the guide vanes 3 are respectively in contact with the outer shell 1 and the inner guide shell 2, the inner guide shell 2 is a hollow cylindrical structure, and the guide vanes 3 are evenly arranged around the central axis of the inner guide shell 2;

[0039] In some embodiments, the outer shell 1 and the flow guide inner shell 2 are both integral structures, the outer shell 1 is bent sequentially from one end to the other end, and the two ends of the outer shell 1 are oriented in different directions, one end is oriented in the same direction as the central axis of the flow guide inner shell 2, and the other end is oriented at an angle to the central axis of the flow guide inner shell 2, and the angle range of the angle is 25-28°;

[0040] In this embodiment, the relative angles of the two ends of the outer shell 1 control the convergence angle of the airflow. If the convergence angle is too small, it will lead to insufficient convergence, and if the convergence angle is too large, it will lead to pressure loss. When the angle range of the outer shell 1 is 25-28°, the airflow will gradually converge in the outer shell 1. This convergence effect increases the axial component of the air flow, thereby increasing the energy density of the airflow.

[0041] In some embodiments, a through hole is provided through the middle of the guide static blade 3, and a convex column 301 is provided on one end surface of the plane of the guide static blade 3. The outer wall surface of the guide inner shell 2 is evenly provided with recessed portions 201 along its circumference, and the recessed portion 201 is recessed toward the direction of its axis. The size of the convex column 301 matches that of the recessed portion 201, and the convex column 301 is limitedly set in the recessed portion 201. The guide static blade 3 is bent toward its front end as a whole, and the bending angle range of the two ends of the guide static blade 3 is 17-20°.

[0042] In some embodiments, the convex pillars 301 are disposed on both sides of the top and bottom of one end surface of the guide vane 3, and the number of the recessed portions 201 is the same as the number of the convex pillars 301;

[0043] In some embodiments, the outer shell 1 and the guide inner shell 2 are uniformly provided with through holes along the circumference thereof, the number of through holes on the outer shell 1 and the guide inner shell 2 is the same as the number of the guide static blades 3, and the guide device further comprises a connector, which can sequentially pass through the through holes on the outer shell 1, the guide static blades 3 and the guide inner shell 2, so as to fix the outer shell 1, the guide static blades 3 and the guide inner shell 2 together;

[0044] In some embodiments, the flow guide inner shell 2 includes an expanded diameter portion 202 and a cylindrical portion 203. The expanded diameter portion 202 is disposed at the top of the cylindrical portion 203. The expanded diameter portion 202 extends outward from top to bottom along the cylindrical portion 203 at an extension angle, and then the expanded diameter portion 202 is sequentially expanded from the top downward;

[0045] In some embodiments, the extension angle of the enlarged diameter portion 202 increases from top to bottom, and the bottom of the enlarged diameter portion 202 is connected to the top of the cylindrical portion 203;

[0046] In some embodiments, a fixed number of first weight-reducing holes 204 are provided through the cylindrical portion 203 along its circumference, and a second weight-reducing hole 205 is also provided on the flow guide inner shell 2, which is located between the enlarged diameter portion 202 and the cylindrical portion 203. A rectangular opening 206 is provided at the front end of the cylindrical portion 203, and a trapezoidal opening 207 is provided at the rear end. The rectangular opening 206 is arranged to penetrate the front end surface of the cylindrical portion 203 from top to bottom, and an inverted trapezoidal opening 208 is provided on the enlarged diameter portion 202, which is correspondingly located above the rectangular opening 206. The two side walls of the enlarged diameter portion 202 at the inverted trapezoidal opening 208 are in contact with the two side walls of the cylindrical portion 203 at the rectangular opening 206, and the top corner point of the inverted trapezoidal opening 208 is arranged in an arc shape;

[0047] In this embodiment, the inner shell 2 forms a stable flow passage through the design of the enlarged diameter portion 202 and the cylindrical portion 203, smoothes the airflow path, and reduces the speed mutation when the airflow enters the deflector;

[0048] In some embodiments, a base 209 is further provided at the bottom end of the cylindrical portion 203, which is correspondingly arranged at the edges of the rectangular opening 206 and the trapezoidal opening 207. A connecting hole 210 is penetrated through the base 209. The chord length of the plane end of the guide vane 3 ranges from 0.8 to 1.1 times the maximum distance between the left and right end surfaces.

[0049] In this embodiment, the tetrahedral shape of the guide vane 3 and the bending angle range of 17-20° can eliminate the uneven velocity distribution in the airflow, reduce the turbulence effect, and make the flow field at the outlet of the guide vane more stable. At the same time, the chord length of the plane end of the guide vane 3 increases the control area of ​​the guide vane 3 on the airflow, which cooperates with the width of the guide vane 3 to further avoid turbulence.

[0050] The present invention also provides a working method of the above-mentioned flow guide, comprising the following steps:

[0051] S1: Install the deflector onto the high-speed fan through the connecting hole 210;

[0052] S2: Start the high-speed fan to blow the high-pressure gas into the deflector;

[0053] S3: Part of the high-pressure gas is blown out through the hollow part of the guide vane, and the rest of the high-pressure gas is blown out through the guide vane 3;

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flow guide, characterized in that: include: An outer shell (1), an inner flow guide shell (2) and a guide vane (3), wherein the outer shell (1) is sleeved on the outer side of the inner flow guide shell (2), the guide vane (3) is arranged between the outer shell (1) and the inner flow guide shell (2), the guide vane (3) is a tetrahedron structure, the left and right end surfaces thereof are both configured as planes, the top and bottom ends of the front and rear end surfaces are arranged in contact, the left and right end surfaces of the guide vane (3) are respectively in contact with the outer shell (1) and the inner flow guide shell (2), the inner flow guide shell (2) is a hollow cylindrical structure, and the guide vanes (3) are evenly arranged around the central axis of the inner flow guide shell (2).

2. The deflector according to claim 1, characterized in that: The outer shell (1) and the flow-guiding inner shell (2) are both of an integrated structure. The outer shell (1) is bent from one end to the other end in sequence, and the two ends of the outer shell (1) are oriented in different directions. One end is oriented in the same direction as the central axis of the flow-guiding inner shell (2), and the other end is oriented at an angle to the central axis of the flow-guiding inner shell (2), and the angle range of the angle is 25-28°.

3. The deflector according to claim 2, characterized in that: A through hole is provided through the middle of the guide static blade (3); a convex column (301) is provided on one end surface of a plane of the guide static blade (3); a recessed portion (201) is evenly provided on the outer wall surface of the guide inner shell (2) along its circumference; the recessed portion (201) is recessed in the direction of its axis; the size of the convex column (301) matches that of the recessed portion (201); and the convex column (301) is limitedly arranged in the recessed portion (201); the guide static blade (3) is bent toward its front end as a whole; and the bending angles of the two ends of the guide static blade (3) relative to each other range from 17 to 20 degrees.

4. The deflector according to claim 3, characterized in that: The convex columns (301) are arranged on both sides of the top and bottom of one end surface of the guide static blade (3), and the number of the recessed portions (201) is the same as the number of the convex columns (301).

5. The deflector according to claim 4, characterized in that: The outer shell (1) and the guide inner shell (2) are both uniformly provided with through holes along their circumferences, the number of through holes on the outer shell (1) and the guide inner shell (2) is the same as the number of guide vanes (3), and the guide device further comprises a connector, which can pass through the through holes on the outer shell (1), the guide vanes (3) and the guide inner shell (2) in sequence, and is used to fix the outer shell (1), the guide vanes (3) and the guide inner shell (2) together.

6. The deflector according to claim 5, characterized in that: The flow guide inner shell (2) comprises an expanded diameter portion (202) and a cylindrical portion (203), wherein the expanded diameter portion (202) is arranged at the top of the cylindrical portion (203), and the expanded diameter portion (202) extends outwards along the cylindrical portion (203) from top to bottom at an extension angle, and then the expanded diameter portion (202) is arranged to expand in diameter in sequence from its top end downward.

7. The deflector according to claim 6, characterized in that: The extension angle of the expanded diameter portion (202) increases from top to bottom, and the bottom of the expanded diameter portion (202) is connected to the top of the cylindrical portion (203).

8. The deflector according to claim 7, characterized in that: The cylindrical portion (203) is provided with a fixed number of first weight-reducing holes (204) along its circumferential direction. The flow guide inner shell (2) is also provided with a second weight-reducing hole (205) located between the expanded diameter portion (202) and the cylindrical portion (203). The cylindrical portion (203) is provided with a rectangular opening (206) at the front end and a trapezoidal opening (207) at the rear end. The rectangular opening (206) is provided from top to bottom through the front end surface of the cylindrical portion (203). The expanded diameter portion (202) is provided with an inverted trapezoidal opening (208) correspondingly located above the rectangular opening (206). The two side walls of the expanded diameter portion (202) at the inverted trapezoidal opening (208) are in contact with the two side walls of the cylindrical portion (203) at the rectangular opening (206). The top corner point of the inverted trapezoidal opening (208) is arranged in an arc shape.

9. The deflector according to claim 8, characterized in that: The bottom end of the cylindrical portion (203) is also provided with a base (209), which is correspondingly arranged at the edges of the rectangular opening (206) and the trapezoidal opening (207); a connecting hole (210) is penetrated through the base (209); and the chord length of the plane end of the guide vane (3) ranges from 0.8 to 1.1 times the maximum distance between the left and right end surfaces.

10. A method for operating a flow director according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Install the deflector onto the high-speed fan through the connecting hole (210); S2: Start the high-speed fan to blow the high-pressure gas into the deflector; S3: Part of the high-pressure gas is blown out through the hollow part of the guide vane, and the rest of the high-pressure gas is blown out through the guide vane (3).

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