CN101503113A - Shape memory spring driven hinder margin camber variable wing - Google Patents

Abstract

A variable trailing edge camber wing driven by a shape memory spring relates to a variable trailing edge camber wing. Aiming at the problems of complex mechanism, bulky structure, premature airflow separation and low aerodynamic efficiency in traditional aircraft control surfaces. The front and rear end faces of the upper sheet metal are fixedly connected to the connecting plate and the front end face of the rear edge of the wing, the front and rear end faces of the lower sheet metal are fixedly connected to the front end face of the connecting plate and the rear edge of the wing, and the upper and lower sheet metal The upper and lower pillars are fixed on the same side surface, the two ends of the first shape memory spring are affixed to the fixed plate and the upper metal sheet, and the two ends of the second shape memory spring are affixed to the upper pillar and the front end of the rear edge of the wing , both ends of the third shape memory spring are affixed to the fixing plate and the lower metal sheet, and both ends of the fourth shape memory spring are affixed to the lower strut and the front end of the rear edge of the wing. The invention has the advantages of light weight, simple structure and high aerodynamic efficiency.

Description

A variable trailing edge camber wing driven by shape memory springs

technical field

The invention relates to a variable trailing edge camber wing.

Background technique

At present, the control surfaces (such as ailerons and flaps) of most aircraft use mechanical drive mechanisms to change the camber of the wings to provide the aircraft with the aerodynamic force required for maneuvering. However, the control surface using a mechanical drive mechanism has the problems of complex mechanism, heavy weight, premature separation of airflow, and low aerodynamic efficiency.

Contents of the invention

The purpose of the present invention is to provide a variable trailing edge camber wing driven by a shape memory spring, which replaces the traditional mechanical drive mechanism, so as to solve the problems of complex and heavy control surface mechanism of the existing aircraft, premature airflow separation and low aerodynamic efficiency. question.

The technical scheme that the present invention takes for solving the above-mentioned technical problem is: the airfoil with variable trailing edge camber of the present invention comprises the trailing edge of the wing; the airfoil with variable trailing edge camber of the present invention also includes an upper sheet metal, a first shape memory spring , the upper pillar, the second shape memory spring, the third shape memory spring, the lower pillar, the fourth shape memory spring, the lower metal sheet and the connection plate; the front end of the upper metal sheet is fixedly connected with the upper end of the connection plate, and the upper metal The rear end surface of the thin plate is fixedly connected to the upper end of the front end surface of the wing trailing edge, the front end surface of the lower metal sheet is fixedly connected to the lower end of the connecting plate, and the rear end surface of the lower metal sheet is fixed to the lower end of the front end surface of the wing trailing edge connection, the same side surfaces of the upper metal sheet and the lower metal sheet are respectively fixed with an upper pillar and a lower pillar along the vertical direction, and the two ends of the first shape memory spring are respectively fixedly connected with the fixing plate and the upper metal sheet, and the The two ends of the second shape memory spring are respectively fixedly connected with the upper strut and the front end of the rear edge of the wing, the two ends of the third shape memory spring are respectively fixedly connected with the fixing plate and the lower metal sheet, and the fourth shape memory The two ends of the spring are respectively fixedly connected with the lower strut and the front end of the rear edge of the wing.

The beneficial effects of the present invention are: in the present invention, the smooth and continuous variable camber wing technology is adopted, and the mechanical hinge is canceled, so that the wing surface is smooth, continuous and seamless during the deformation process, so that the control surface is avoided. When deflecting, the airflow separation occurs due to the sudden change in the slope of the wing surface, thereby improving the pressure distribution of the wing. The smooth and continuous change of the wing camber can also improve the lift-to-drag ratio under the existing flight conditions. By adjusting the maximum lift-to-drag ratio, the maximum lift coefficient is increased, thereby extending the cruising range. Another effect of changing the camber of the wing is that the buffet boundary in the cruise Mach range is widened, allowing the aircraft to obtain a higher lift coefficient in flight. This allows the aircraft to fly at higher altitudes without excessive weight constraints imposed by low wing loads in wing designs. In addition, the variable trailing edge camber wing surface remains smooth, continuous and seamless during the deformation process, which greatly reduces radar echoes and fundamentally improves the stealth performance of the aircraft. For reconnaissance aircraft, the use of variable trailing edge camber wings can improve its cruising capability and range, and its stealth performance is also greatly improved; for civil airliners, the use of variable trailing edge camber wings reduces its fuel consumption Consumption, improve the economy of passenger aircraft. Therefore, compared with the mechanical drive mechanism widely used at present, the present invention has the advantages of light weight, simple structure, convenient maintenance, and continuous deflection of the trailing edge of the wing, thereby greatly reducing the maintenance cost of the aircraft and improving the combat maneuverability of the weapon system and safety, reducing the risk of weapons and equipment in service. In the long run, this change in the shape of the aircraft can enable the aircraft to achieve a greater lift-to-drag ratio, and have high fuel efficiency, high flight quality, high safety performance, better maneuverability, and faster landing speed. A take-off field for all conditions.

Description of drawings

Fig. 1 is a schematic front view of the overall structure of the present invention (under the undeformed state of the trailing edge of the wing 5), and Fig. 2 is a schematic front view of the overall structure of the present invention (under the deformed state of the trailing edge of the wing 5).

Detailed ways

Embodiment 1: This embodiment is described in conjunction with FIG. 1. The variable trailing edge camber wing of this embodiment includes a wing trailing edge 5; the variable trailing edge camber wing also includes an upper metal sheet 1, a first shape Memory spring 2, upper strut 3, second shape memory spring 4, third shape memory spring 6, lower strut 7, fourth shape memory spring 8, lower metal sheet 9 and connecting plate 10; the front end of the upper sheet metal 1 The surface is fixedly connected with the upper end of the connection plate 10, the rear end surface of the upper sheet metal 1 is fixedly connected with the upper end of the front end surface of the wing trailing edge 5, the front end surface of the lower metal sheet 9 is fixedly connected with the lower end of the connection plate 10, and the lower The rear end surface of the metal sheet 9 is fixedly connected to the lower end of the front end surface of the wing trailing edge 5, and the same side surfaces of the upper sheet metal 1 and the lower sheet metal 9 are respectively fixed with an upper support 3 and a lower support 7 along the vertical direction. The two ends of the first shape memory spring 2 are respectively fixedly connected with the fixed plate 10 and the upper sheet metal 1, and the two ends of the second shape memory spring 4 are respectively fixedly connected with the upper strut 3 and the front end surface of the wing trailing edge 5 , the two ends of the third shape memory spring 6 are fixedly connected with the fixed plate 10 and the lower metal sheet 9 respectively, and the two ends of the fourth shape memory spring 8 are respectively connected with the front end surface of the lower strut 7 and the rear edge of the wing 5 Fixed connection.

Specific Embodiment 2: This embodiment is described in conjunction with FIG. 1 . The difference between this embodiment and Embodiment 1 is that: the two ends of the first shape memory spring 2 of this embodiment respectively fix the middle part of the plate 10 and the upper metal sheet 1 The middle part of the second shape memory spring 4 is fixedly connected, and the two ends of the second shape memory spring 4 are respectively fixedly connected with the upper end of the upper strut 3 and the middle part of the front end surface of the wing trailing edge 5, and the two ends of the third shape memory spring 6 are respectively connected with The middle part of the fixing plate 10 is fixedly connected with the middle part of the lower thin metal plate 9, and the two ends of the fourth shape memory spring 8 are respectively fixedly connected with the lower end of the lower strut 7 and the middle part of the front end surface of the wing trailing edge 5. Such setting can make the camber of the wing trailing edge 5 reach the best state, and it is most likely to be bent and deformed.

Specific Embodiment Three: This embodiment is described in conjunction with FIG. 1. The materials of the first shape memory spring 2, the second shape memory spring 4, the third shape memory spring 6 and the fourth shape memory spring 8 of this embodiment are all in the shape of TiNi Memory alloy has good shape memory effect. Others are the same as in the first or second embodiment.

Embodiment 4: This embodiment is described in conjunction with FIG. 1 . The materials of the upper sheet metal 1 and the lower sheet metal 9 in this embodiment are all steel, iron or aluminum metal materials, which can be selected according to the needs of use. Others are the same as in the first or second embodiment.

Embodiment 5: This embodiment is described with reference to FIG. 1 . In this embodiment, the thickness of the upper thin metal plate 1 and the thickness of the lower metal thin plate 9 are equal and both are 0.1 mm to 0.5 mm. Such setting can meet the strength requirement of the variable trailing edge camber wing. Others are the same as the specific embodiment 1, 2, 3 or 4.

Embodiment 6: This embodiment is described with reference to FIG. 1 . In this embodiment, the thickness of the upper thin metal plate 1 and the thickness of the lower metal thin plate 9 are both 0.3mm. On the premise of ensuring the strength requirements of the variable trailing edge camber wing, the overall weight can also be reduced. Others are the same as in the fifth embodiment.

Embodiment 7: This embodiment is described with reference to FIG. 1 . The upper pillar 3 and the lower pillar 7 of this embodiment are coaxial. So arranged, it is convenient for the wing to bend. Others are the same as in the first embodiment.

Working principle: The process of a complete deformed wing changing the camber is: ① heating the third shape memory spring 6; ② after a period of heating, the third shape memory spring 6 begins to shrink and deform; ③ the lower metal sheet 9 is in the Under the action of the contraction force of the three shape memory springs 6, bending deformation is produced; ④ the upper sheet metal 1 will bend around the upper pillar 3, so that the wing trailing edge 5 is deflected downward (see accompanying drawing 2). Conversely, if the upward deflection of the trailing edge 5 of the wing is desired, only the first shape-memory spring 2 needs to be heated. Under the action of the contraction force of the shape memory spring 2 , bending deformation occurs, and the lower thin metal plate 9 will perform bending movement around the lower strut 7 , so that the trailing edge 5 of the wing is deflected upward.

Claims (6)

1, a kind of variable trailing edge camber wing of shape memory spring driving, described variable trailing edge camber wing comprises trailing edge (5); It is characterized in that: described variable trailing edge camber wing also comprises sheet metal (1), first shape memory spring (2), upper supporting column (3), second shape memory spring (4), the 3rd shape memory spring (6), lower supporting rod (7), the 4th shape memory spring (8), following sheet metal (9) and connecting panel (10); The described front end face of going up sheet metal (1) is captiveed joint with the upper end of connecting panel (10), the aft end face of last sheet metal (1) is captiveed joint with the upper end of the front end face of trailing edge (5), the described front end face of sheet metal (9) is down captiveed joint with the lower end of connecting panel (10), the aft end face of following sheet metal (9) is captiveed joint with the lower end of the front end face of trailing edge (5), the surface, the same side of last sheet metal (1) and following sheet metal (9) is vertically gone up and is fixed with upper supporting column (3) and lower supporting rod (7) respectively, captive joint with last sheet metal (1) with adapter plate (10) respectively in the two ends of described first shape memory spring (2), captive joint with the front end face of trailing edge (5) with upper supporting column (3) respectively in the two ends of described second shape memory spring (4), captiveing joint with following sheet metal (9) with adapter plate (10) respectively in the two ends of described the 3rd shape memory spring (6), captives joint with the front end face of trailing edge (5) with lower supporting rod (7) respectively in the two ends of described the 4th shape memory spring (8).

2, the variable trailing edge camber wing of a kind of shape memory spring driving according to claim 1, it is characterized in that: the material of described first shape memory spring (2), second shape memory spring (4), the 3rd shape memory spring (6) and the 4th shape memory spring (8) is the TiNi marmem.

3, the variable trailing edge camber wing of a kind of shape memory spring driving according to claim 1 is characterized in that: the described material that goes up sheet metal (1) and following sheet metal (9) is steel, iron or aluminum metallic material.

4, the variable trailing edge camber wing that drives according to claim 1,2 or 3 described a kind of shape memory spring is characterized in that: the thickness of the described thickness of going up sheet metal (1) and following sheet metal (9) is equal and be 0.1mm～0.5mm.

5, the variable trailing edge camber wing of a kind of shape memory spring driving according to claim 4 is characterized in that: the thickness of described upward sheet metal (1) and the thickness of following sheet metal (9) are 0.3mm.

6, the variable trailing edge camber wing of a kind of shape memory spring driving according to claim 1, it is characterized in that: described upper supporting column (3) and lower supporting rod (7) are coaxial.

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