A double-row linked guide vane device

Abstract

The utility model relates to a double-row linkage type flow guiding vane device relates to the field of aircraft technology, and the flow guiding vane is divided into several groups and is arranged on the support (1) from top to bottom, and each group of flow guiding vane includes front vane (6) and rear vane (7), and the two ends of front vane (6) and rear vane (7) are fixed on middle connecting rod (3) and rear connecting rod (4) respectively, one end of rear connecting rod (4) is hinged on inter-group connecting rod (5), and the other end is hinged with one end of front connecting rod (2), and front connecting rod (2) is equipped with front sliding block (8) and rear sliding block (9) that can slide along its front and back, one end of middle connecting rod (3) is hinged on the position of the front of rear connecting rod (4) middle, and the other end is hinged on rear sliding block (9), and front sliding block (8) is hinged on support (1), and driving device is connected with rear connecting rod (4) or middle connecting rod (3). Simple and reliable structure can correct propeller rotation direction wake, scatter concentrated wake, and balance downstream pressure field.

Description

Technical Field

[0001] This invention relates to the field of aircraft technology, and more specifically to a double-row linked guide vane cascade device for use behind an aircraft propeller. Background Technology

[0002] When a propeller rotates, it generates a strong circumferential wake, tip vortex, and negative pressure separation zone, resulting in significant kinetic energy loss in the wake, reduced propulsion efficiency, and noticeable aerodynamic noise and turbulence interference. The arrangement of a guide vane cascade composed of multiple guide vanes can adjust the airflow path, reduce drag, optimize the airflow field around the aircraft, and improve propulsion efficiency. Existing propeller-side rectification structures are generally fixed airfoil cascades with non-adjustable blade angles, making it impossible to match the wake angle changes under different operating conditions such as propeller idling, cruise, and high load. This results in a limited rectification effect and poor adaptability to different operating conditions. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a double-row blade cascade device with adjustable blade angle.

[0004] The technical solution of this invention is: a double-row linked guide vane device, including guide vanes, a support, a front connecting rod, a middle connecting rod, a rear connecting rod, an inter-group connecting rod, and a driving device. The guide vanes are divided into several groups and arranged on the support from top to bottom. Each group of guide vanes includes a front vane and a rear vane. The two ends of the front vane and the rear vane are respectively fixed to the middle connecting rod and the rear connecting rod. The inter-group connecting rod is arranged vertically. One end of the rear connecting rod is hinged to the inter-group connecting rod, and the other end is hinged to one end of the front connecting rod. The front connecting rod is provided with a front slider and a rear slider that can slide back and forth along it. One end of the middle connecting rod is hinged to the middle of the rear connecting rod at a position slightly forward and is hinged to the support through the hinge axis. The other end is hinged to the rear slider. The front slider is hinged to the support. The driving device is connected to the rear connecting rod or the middle connecting rod. The driving device can drive the rear connecting rod to swing around the middle hinge axis.

[0005] The technical advantages of this invention are: simple and reliable structure; ability to correct propeller spin direction and wake; dispersion of concentrated wake vortices; and equalization of downstream pressure field, significantly reducing wake energy dissipation, improving overall propulsion efficiency, and reducing aerodynamic noise. Each group of guide vanes in this device contains two blades, and the swing angle of each group of blades can be continuously adjusted in both directions, dynamically matching the wake spin angle at low, medium, and high propeller speeds. The coordinated operation of the two blades maintains a stable inter-group slotted air passage under any posture, effectively avoiding back separation, flow breakdown, and airflow oscillation caused by single-blade swing, thus significantly improving flow field stability.

[0006] Through the constraint of the linkage mechanism, the front and rear blades maintain a certain width of through-flow gap throughout their entire working stroke, from upward negative deflection to mid-position straightness and downward positive deflection, ensuring the blades never come into contact. This overcomes the shortcomings of traditional propellers, such as non-adjustable rear blade cascades, susceptibility to airflow separation, and limited functionality. It can dynamically correct propeller spin direction and wake, suppress wake vortices, and recover wake kinetic energy. Furthermore, it can actively generate lift or downforce by adjusting the blade deflection angle, assisting in carrier attitude control. It is suitable for various propeller-driven propulsion platforms. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the connecting rod portion when the guide vane of the present invention tilts upwards; Figure 3 This is a schematic diagram of the connecting rod portion when the guide vane of the present invention swings downwards. Detailed Implementation

[0008] like Figure 1 , 2 As shown in Figure 3, a double-row linked guide vane device includes guide vanes, a support 1, a front connecting rod 2, a middle connecting rod 3, a rear connecting rod 4, an inter-group connecting rod 5, and a driving device. The guide vanes are arranged in several groups stacked on the support 1 from top to bottom. Each group of guide vanes includes a front vane 6 and a rear vane 7. The two ends of the front vane 6 and the rear vane 7 are respectively fixed to the middle connecting rod 3 and the rear connecting rod 4. The inter-group connecting rod 5 is arranged vertically. One end of the rear connecting rod 4 is hinged to the inter-group connecting rod 5, and the other end is hinged to one end of the front connecting rod 2. The front connecting rod 2 is equipped with a front slider 8 and a rear slider 9 that can slide back and forth along it. One end of the intermediate connecting rod 3 is hinged to the rear connecting rod 4 at a position slightly forward and in the middle, and is hinged to the bracket 1 through this hinge axis. The other end is hinged to the rear slider 9. The front slider 8 is hinged to the bracket 1. This hinge axis is at the same horizontal position as the hinge axis between the intermediate connecting rod and the bracket. The drive device is connected to the rear connecting rod 4 or the intermediate connecting rod 3, and can also be connected to other related linkage components. The drive device can drive the rear connecting rod 4 to swing around its middle hinge axis. The guide vane assembly is set behind the propeller of the aircraft through a bracket. The front connecting rod, intermediate connecting rod, rear connecting rod, and inter-group connecting rod are respectively set on both sides behind the propeller. The front and rear blades are arranged laterally in pairs behind the propeller. When the angle of the front and rear blades changes, the wing can be more curved, which can effectively improve lift. During operation, the drive unit drives one of the rear connecting rods to swing up and down, and each set of blades will move together under the drive of the inter-set connecting rods, making upward, flattening or downward swinging movements.

[0009] A gap is provided between the front blade 6 and the rear blade 7 to allow airflow. Both the front and rear blades have an airfoil structure, with slots forming a slotted flap structure. When bending downwards, the high-pressure airflow on the lower surface flows at high speed to the upper surface through the slots, increasing the air velocity in the boundary layer of the upper wing, delaying airflow separation, and improving the maximum lift coefficient. Bending upwards increases downforce.

[0010] The front slider 8 is a tubular body, and the front slider 8 is slidably fitted onto the front connecting rod 2.

[0011] The rear slider 9 is a tubular body, and the rear slider 9 can be slidably fitted onto the front connecting rod 2.

[0012] The drive device is fixedly connected to the rear link 4 via a hinge shaft in the middle of the rear link 4, driving it to rotate, thereby driving the rear link.

[0013] The drive device is connected to the rear connecting rod 4 via gear 10. The hinge shaft between the gear and the rear connecting rod is coaxial. The forward or reverse rotation of the drive gear can drive the rear connecting rod to swing, thereby driving each set of blades of the blade rack device to make an upward or downward swinging motion.

[0014] The driving device is an electric motor.

[0015] The guide vane cascade is a stacked airfoil structure; a single guide vane unit includes a leading airfoil blade and a trailing airfoil blade; multiple guide vane units are arranged horizontally and stacked vertically. The blades deflect downwards to guide the airflow downwards, generating lift; they deflect upwards to guide the airflow upwards, generating downforce. In addition to propeller propulsion, it can provide additional vertical force, assisting in the lift and attitude trim of the carrier and expanding the maneuverability of the propeller-powered platform.

Claims

1. A double-row linked guide vane device, comprising guide vanes and a support (1), characterized in that, It also includes a front connecting rod (2), a middle connecting rod (3), a rear connecting rod (4), an inter-group connecting rod (5), and a driving device. The guide vanes are divided into several groups and arranged from top to bottom on the support (1). Each group of guide vanes includes a front vane (6) and a rear vane (7). The two ends of the front vane (6) and the rear vane (7) are respectively fixed to the middle connecting rod (3) and the rear connecting rod (4). The inter-group connecting rod (5) is arranged vertically. One end of the rear connecting rod (4) is hinged to the inter-group connecting rod (5), and the other end is connected to... One end of the front link (2) is hinged, and the front link (2) is provided with a front slider (8) and a rear slider (9) that can slide back and forth along it. One end of the middle link (3) is hinged to the middle of the rear link (4) at a position near the front and is hinged to the bracket (1) through the hinge axis. The other end is hinged to the rear slider (9). The front slider (8) is hinged to the bracket (1). The driving device is connected to the rear link (4) or the middle link (3). The driving device can drive the rear link (4) to swing around the middle hinge axis.

2. The double-row linked guide vane device as described in claim 1, characterized in that, A gap is left between the front blade (6) and the rear blade (7) to allow airflow to pass through.

3. The double-row linked guide vane device as described in claim 1, characterized in that, The front slider (8) is a tubular body, and the front slider (8) is slidably fitted onto the front connecting rod (2).

4. The double-row linked guide vane device as described in claim 1, characterized in that, The rear slider (9) is a tubular body, and the rear slider (9) is slidably fitted onto the front connecting rod (2).

5. The double-row linked guide vane device as described in claim 1, characterized in that, The drive device is fixedly connected to the rear link (4) via the hinge shaft in the middle of the rear link (4).

6. The double-row linked guide vane device as described in claim 5, characterized in that, The drive unit is connected to the rear connecting rod (4) via a gear (10).

7. The double-row linked guide vane device as described in claim 6, characterized in that, The driving device is an electric motor.

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