CN114810215A - A transducible guide vane based on electromagnetic control - Google Patents

Abstract

The invention discloses a rotatable guide vane based on electromagnetic control, which comprises a rotatable air inlet front edge, a bendable blade web, a bendable blade back, a rotatable air outlet tail edge and a magnetic suction module, wherein the bendable blade web and the bendable blade back are fixedly arranged on the rotatable air inlet front edge and the rotatable air outlet tail edge, and the magnetic suction module is connected with the rotatable air inlet front edge and the rotatable air outlet tail edge. The invention discloses a rotatable guide vane based on electromagnetic control, which controls vanes to be in different states through a magnet module so as to adapt to different air inlet angles and further provide different lifting forces, and can adjust the air inlet angles and provide more appropriate and stable inflow conditions for downstream.

Description

A transducible guide vane based on electromagnetic control

technical field

The invention relates to the field of impeller machinery and pneumatic control, in particular to a steerable guide vane based on electromagnetic control.

Background technique

In the field of aerodynamics, the main function of the guide vane is to smoothly guide the outside air flow to the inlet of the downstream components. For example, in an aero-engine, the inlet guide vane is the compressor inlet that guides the outside airflow to the downstream. This requires the guide vane to have two properties: First, to adapt to different intake angles. Second, it can provide stable import conditions for the downstream.

At present, the guide vanes in this field are generally fixed vanes, that is, after the design is determined, the shape and angle of the vanes cannot be adjusted. Another technique is to take the blade as a whole and directly adjust the placement angle of the blade. The fixed guide vane has a simple structure, but can only adapt to one air intake condition, and has poor adaptability under other air intake conditions. Not only cannot adapt to the angle of the inlet airflow, but also cannot adjust the airflow angle of the outlet. Although the rotatable inlet guide vanes can adapt to different intake angles, the outlet angle of the airflow will also change with the change of the rotation angle, which cannot provide stable inlet conditions for the downstream.

SUMMARY OF THE INVENTION

The present invention provides a steerable guide vane based on electromagnetic control, to overcome the simple structure of the fixed guide vane in the field, the single applicable air intake working condition, and the poor adaptability under other air intake working conditions; the angle that cannot adapt to the inlet airflow, It is also impossible to adjust the limitation of the airflow angle at the outlet; although the existing rotatable inlet guide vanes can adapt to different intake angles, the outlet angle of the airflow will also change with the change of the rotation angle, which cannot provide downstream The issue of stable import conditions.

In order to achieve the above object, the technical scheme of the present invention is:

A rotatable guide vane based on electromagnetic control, comprising a rotatable intake leading edge, a bendable blade belly, a bendable blade back, a rotatable exhaust trailing edge and a magnetic suction module, the bendable blade belly The flexible blade back is fixedly mounted on the rotatable intake leading edge and the rotatable exhaust trailing edge, and the magnetic suction module is connected with the rotatable intake leading edge and the rotatable exhaust trailing edge.

Further, the flexible blade belly and the flexible blade back can be fixed on the rotatable intake leading edge and the rotatable exhaust trailing edge by welding or screwing.

Further, both the flexible blade belly and the flexible blade back are made of 60Si2Mn spring steel.

Further, the magnetic attraction module is connected with the rotatable intake leading edge and the rotatable exhaust trailing edge through hinges.

Further, an electromagnet is provided inside the magnetic attraction module, and a DC suction cup type electromagnet is used, and a fixing plate with a thickness of 1 mm is installed on the side where the electromagnet does not generate magnetic force.

Beneficial effects of the present invention:

The invention discloses a rotatable guide vane based on electromagnetic control. The on-off of the module can then control the blades to be in different states to adapt to different intake angles, thereby providing different lift forces, and at the same time, the intake angle can be adjusted to provide more suitable and stable inflow conditions for the downstream.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the structure schematic diagram of the guide vane that can adjust the inlet and outlet airflow angle of the present invention;

2 is a schematic structural diagram of a magnetic attraction module of the present invention;

3 is a front view of the magnetic attraction module, the rotatable intake leading edge and the rotatable exhaust trailing edge connection structure of the present invention;

Fig. 4 is the top view of Fig. 3;

Fig. 5 is the bottom view of Fig. 3;

FIG. 6 is a structural comparison diagram of the airfoil guide vane before and after energization of the present invention;

FIG. 7 is a comparison diagram of the total pressure loss (Cpt) at the outlet of the variable airfoil guide vane of the present invention.

In the figure: 1. Air intake leading edge; 2. Leaf belly; 3. Leaf back; 4. Air outlet trailing edge; 5. Magnetic suction module; 6. Electromagnet; 7. Fixed piece.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

This embodiment provides a steerable guide vane based on electromagnetic control. As shown in FIG. 1 , a steerable guide vane based on electromagnetic control includes a rotatable intake leading edge 1 and a bendable vane 2 , a bendable blade back 3, a rotatable exhaust trailing edge 4 and a magnetic suction module 5, the bendable blade belly 2 and the bendable blade back 3 are fixedly installed on the rotatable intake leading edge 1 and the rotatable On the outlet tail edge 4 of the magnetic suction module 5 , one end of the magnetic suction module 5 is connected with the rotatable intake air leading edge 1 , and the other end of the magnetic suction module 5 is connected with the rotating gas outlet tail edge 4 .

The guide vanes are generally fixed vanes. After the design is determined, the shape and angle of the vanes cannot be adjusted. They can only adapt to one air intake condition. The adaptability under other air intake conditions is poor, not only can they not adapt to the angle of the inlet airflow , and the airflow angle of the outlet cannot be adjusted. Although the rotatable inlet guide vanes can directly adjust the placement angle of the vanes to adapt to different intake angles, the outlet angle of the airflow will also change with the change of the rotation angle, which cannot provide stable inlet conditions for the downstream.

Based on the original intention of the above design, a rotatable intake leading edge 1 , a flexible blade belly 2 , a flexible blade back 3 , a rotatable exhaust tail edge 4 and a magnetic suction module 5 are used. , and then control the blades to be in different states to adapt to different intake angles, thereby providing different lift forces, and at the same time, the intake angle can be adjusted to provide more suitable and stable inflow conditions for the downstream.

In a specific embodiment, the flexible blade belly 2 and the flexible blade back 3 can be fixedly installed on the rotatable intake leading edge 1 and the rotatable exhaust trailing edge 4 by welding or screws, so as to ensure the structural frame integrity.

In a specific embodiment, the bendable leaf belly 2 and the bendable leaf back 3 are both made of 60Si2Mn spring steel, which on the one hand ensures that the original shape can be guaranteed when there is no magnetic attraction, and on the other hand, can be bent when subjected to magnetic force. deformation.

In a specific embodiment, the magnetic attraction module 5 is connected with the rotatable intake leading edge 1 and the rotatable exhaust trailing edge 4 through hinges, and the flexible blade belly 2 and the flexible blade back 3 are connected by hinges. When the electromagnetic force is bent, the rotatable intake leading edge 1 and the rotatable exhaust trailing edge 4 are rotated through hinges.

In a specific embodiment, as shown in FIG. 2 to FIG. 4 , eight electromagnets 7 are placed inside the magnetic attraction module 5 , and a fixing plate 6 with a thickness of 1 mm is placed on the side of the electromagnet 7 where no magnetic force is generated. To fix the electromagnet 7, as shown in Figure 5, it is divided into two sides, A and B, C and D. Each side is provided with four electromagnets 7. Parts A and B are used to attract the flexible blade back 3, and the electromagnet 7 is close to the blade. A fixed piece 6 is installed on one side of the belly 2, and the parts C and D are used to attract the flexible leaf belly 2. The electromagnet 7 is installed with a fixed piece 6 on the side of the back 3, so as to realize the independent control of both sides.

In a specific embodiment, as shown in FIG. 6 , in the magnetic attraction module 5, when A and B are energized, the blade back 3 is attracted by the magnetic force, which drives the rotatable intake leading edge 1 and the rotatable exhaust trailing edge 4 to deflect upwards ; When C, D are energized, the blade belly 2 is attracted by the magnetic force, and drives the rotatable intake leading edge 1 and the rotatable exhaust trailing edge 4 to deflect downward. When the magnetic attraction module 5 is powered off, the blade back 3 Or the blade back 2 maintains the original shape, and the rotatable intake leading edge 1 and the rotatable exhaust trailing edge 4 do not deflect.

In this design, the deflection angle to the side of the blade belly 2 is defined as "-", and the deflection angle to the side of the blade back 3 is defined as "+".

In the specific embodiment, as shown in Table 1 below, taking the side of the blade back 3 as an example, the uniform distribution load of the blade back 3 is q, and Wmax is the maximum deflection of 3mm, that is, when the front and rear edges are deflected by 10°, the maximum drop in the middle of the blade back 3 is about 3mm. The formula for calculating the uniform load is:

Known Wmax, elastic modulus E of 60Si2Mn spring steel, I is the moment of inertia:

Where h is the height of the blade back steel sheet; b is the thickness L of the blade back steel sheet; is the length of the blade back steel sheet.

The parameters of the DC suction cup electromagnet in this embodiment are as follows: model: P20/15, voltage: DC12V, suction force 2.5kg, outer diameter 20mm, inner diameter 7.8mm, thickness 15mm, screw mounting hole diameter is 3mm, screw mounting hole depth is 6mm. The calculation parameters of the uniform load are shown in Table 1:

Table 1. Uniform Load Calculation Table

The suction force of each magnet can reach 2.5*9.8=24.5N. Four magnets are used on one side of the device, which can generate a total force of 98N, which is far greater than the uniform load, so the bending of the ventral and the back of the leaf can be easily realized.

Further, when A and B are energized at the same time, the flexible blade back 3 is attracted by the electromagnetic force to bend upward, and drives the rotatable intake leading edge 1 and the rotatable exhaust trailing edge 4 to deflect. The leading edge 1 and the rotatable exhaust trailing edge 4 can produce a deflection of +10°. When C and D are energized at the same time, the flexible blade belly 2 is attracted by the electromagnetic force and bends downward, which drives the rotatable intake leading edge 1 and the rotatable exhaust trailing edge 4 to deflect, at this time, the leading trailing edge can generate -10 ° deflection.

The test data of blade pressure loss are as follows: As shown in Figure 7, when the incoming flow i is ±30°, the total pressure loss coefficient Cpt of the prototype blade (Ori) is 0.024, and the total pressure loss coefficient Cpt of the modified blade (10°-OPT) is 0.020; when the incoming flow i is ±40°, the total pressure loss coefficient Cpt of the prototype blade (Ori) is 0.211, and the total pressure loss coefficient Cpt of the modified blade (10°-OPT) is 0.081; when the incoming flow i is At ±45°, the total pressure loss coefficient Cpt of the prototype blade (Ori) is 0.468, and the total pressure loss coefficient Cpt of the modified blade (10°-OPT) is 0.157. It can be concluded that when the outflow angle increases, the total pressure loss coefficient of the modified blade is larger. The smaller the pressure loss coefficient, the more obvious the optimization result.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (5)

1. The utility model provides a but rotary stator based on electromagnetic control, its characterized in that includes, rotatable air inlet leading edge (1), flexible blade belly (2), flexible blade back (3), rotatable air outlet trailing edge (4) and magnetism inhale module (5), blade belly (2) and blade back (3) relative fixed mounting in air inlet leading edge (1) with on air outlet trailing edge (4), the one end of magnetism inhale module (5) with air inlet leading edge (1) is connected, the other end of magnetism inhale module (5) with air outlet trailing edge (4) are connected.

2. The rotatable guide vane based on electromagnetic control of claim 1, characterized in that the blade belly (2) and the blade back (3) are fixedly mounted on the leading air inlet edge (1) and the trailing air outlet edge (4) by welding or screwing.

3. Rotatable guide vane based on electromagnetic control according to claim 1, characterized in that the magnetic attraction module (5) is connected with the leading inlet edge (1) and the trailing outlet edge (4) by hinges.

4. Rotatable guide vane based on electromagnetic control according to claim 2, characterized in that the blade flank (2) and the blade back (3) are both made of spring steel.

5. Rotatable guide vane based on electromagnetic control according to claim 3, characterized in that the magnetic module (5) is internally provided with an electromagnet (7); and a fixing sheet (6) is arranged on one side of the electromagnet (7) which does not generate magnetic force.

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