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Folded aerodynamic surface

Folded aerodynamic surface
IPC classes for russian patent Folded aerodynamic surface (RU 2338663):
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FIELD: aircraft engineering.

SUBSTANCE: aerodynamic surface comprises fixed and hinged parts, pusher sliding inside the hinge holes and helical converter of the pusher translation motion into the rotary motion of the aforesaid aerodynamic surface rotary part, the converter including a helical-surface cylinder and a pin interacting with the said helical surface. The helical converter is furnished with the second cylinder with helical surfaces with direction opposite to that of the fist cylinder and an additional pin interacting with the second cylinder helical surfaces. Both cylinders are arranged aligned and prohibited to reciprocate by a thrust bearing. One of the cylinders is linked with the aerodynamic surface fixed part while the other one with its rotary part. The pusher is arranged inside the cylinders to reciprocate and revolve therein, the pins being fitted on the said pusher to interact with the cylinders helical surfaces via the spherical sleeves. The said helical surfaces of every cylinder are formed by the side surfaces of helical slots made on the opposite sides of the cylinders rings.

EFFECT: smaller weight and sizes.

3 dwg

 

The invention relates to aircraft, and in particular to collapsible structures of the aerodynamic surfaces of unmanned aerial vehicles.

Known design foldable aerodynamic surfaces, adopted as a prototype (U.S. patent for the invention №3563495, CL-3.29)containing stationary and rotary parts, screw the transducer movement in a sliding cylinder shaped groove, which includes a finger rigidly connected with the rotary part of the surface to prevent rotation of the cylinder on the fixed portion of the surface placed limiter, which is a longitudinal groove made on the cylinder. Through moving cylinder finger interacting with shaped groove, turn the rotary part of the aerodynamic surface, laying out or folding it (depending on the direction of movement of the cylinder). The movement of the cylinder is a plunger (Central core).

The characteristics of the prototype, coinciding with the essential features of the proposed solution are: folding aerodynamic surface contains a fixed and a hinged hinged on her rotary part, a plunger sliding within the holes of the hinge, and screw the Converter of the translational motion of the pusher into rotational motion of the rotating part AE is dinamicheskoi surface, including a cylinder with helical surfaces and interacting with them the finger.

In such constructions folding aerodynamic surfaces of the work coil of the transducer is not effective enough:

- travel limiter on the straight groove under load does not produce a "useful work" - rotation of the movable part of the surface, but requires a significant increase in force on the plunger to overcome the frictional forces at the contact limiter and groove;

- external load is small shoulders, equal to the distance from rotation axis to the points of contact of the finger with a screw surface and limiter - with a groove that also leads to increased efforts on the pusher, and the increase in the shoulders, to reduce this effort entails an increase in the transverse and longitudinal dimensions.

In addition, the longitudinal dimensions of actuators (screw inverter driven progressive action) in such constructions folding surfaces are defined by a double turn coil transducer (transducer and actuator stroke) and at large angles of folding (more than 90°) significantly increase.

All this leads, respectively, to increase the weight and size folding aerodynamic surfaces.

The proposed technical solution run SL is blowing tasks: reduced weight and dimensions folding aerodynamic surfaces under high aerodynamic loads and large angles of opening.

To achieve the technical result in folding of the aerodynamic surface, comprising a fixed and a hinged hinged on her rotary part, a plunger sliding within the holes of the hinge, and screw the Converter of the translational motion of the pusher into a rotary movement of the rotary part of the aerodynamic surface, comprising a cylinder with helical surfaces and interacting with them the finger, screw the Converter comes with a second cylinder with helical surfaces a different direction than the helical surface of the first cylinder, and an additional finger interacting with the helical surfaces of the second cylinder, the cylinders are sequentially aligned and limited thrust bearing from mutually-and-forth movements, with one of the cylinders is connected with a fixed part of the aerodynamic surface, and the other rotary part, the plunger is placed in the inner cavity of the cylinder with the possibility of translational and rotational movements of the fingers mounted on the plunger and cooperating with the helical surfaces of the cylinder through the spherical bushing, and screw the surface of each cylinder is formed with lateral surfaces of the helical grooves made on diametrically opposite sides of the cylinder shells.

otlichitelnye signs offer folding aerodynamic surfaces are as follows - screw the Converter comes with a second cylinder with helical surfaces a different direction than the helical surface of the first cylinder, and an additional finger interacting with the helical surfaces of the second cylinder, the cylinders are sequentially aligned and limited thrust bearing from mutually-and-forth movements, with one of the cylinders is connected with a fixed part of the aerodynamic surface, and the other rotary part, the plunger is placed in the inner cavity of the cylinder with the possibility of translational and rotational movements of the fingers mounted on the plunger and cooperating with the helical surfaces of the cylinder through the spherical bushing, and screw the surface of each cylinder is formed with lateral surfaces of the helical grooves made on diametrically opposite sides of the cylinder shells.

The grooves can be made in the form of grooves on the inner surfaces of the shells of the cylinder or through the entire thickness of the shells, and to provide the necessary law of sowing is a constant or variable pitch.

Due to the presence of these distinctive features, allowing twice as slow coil of the Converter and the drive and double shoulder tackle loads (load is overcome at medium dia the fucking cylinder screw Converter), in conjunction with the known (specified in the restrictive part of the formula), is achieved by the following technical result is compared with the prototype reduced the size and weight of the rotary device, and accordingly, the weight and dimensions of the aerodynamic surfaces, provides a more effective functioning of the coil of the transducer under high aerodynamic loads and large angles of opening.

The proposed solution can be used in the construction of folding aerodynamic surfaces of unmanned aerial vehicles.

The invention is illustrated by drawings.

1 shows a General view of the collapsible aerodynamic surface with a spiral motion Converter, figure 2 shows a cross-section through the screw Converter in the unfolded position of the rotating part, figure 3 shows a cross-section through the screw Converter in the folded position of the rotating part.

We offer rotary device comprises a fixed part 1, pivotally hung on her swivel part 2. With the fixed part 1 is connected to the cylinder 3, and the rotary part 2 - cylinder 4. On the shells of the cylinder is screw slots 5 and 6, with the side surfaces of which (through the spherical bushing 7 and 8) between the fingers 9 and 10, fixed to the plunger 11 of the power is rivada 12. From mutual longitudinal displacement of the cylinders is limited thrust bearing 13.

Described folding aerodynamic surface is as follows.

When triggered, the actuator 12 of the plunger 11 moves the fingers 9 and 10 on slots 5 and 6. Interacting with the groove 5, the finger 9 rotates the plunger 11 relative to the stationary part 1, which, in turn, through the finger 10 rotates the rotary part 2 at the same angle. Interacting with the groove 6, the finger 10 advanced rotates the rotatable part 2. Thus, the smaller the course actuator and screw transducer provides the necessary angle folding aerodynamic surfaces, "not a work groove of the rotation limiter in the proposed device becomes "work" - it also turns the surface on its part of the angle folding.

Folding aerodynamic surface, comprising a fixed and a hinged hinged on her rotary part, a plunger sliding within the holes of the hinge, and screw the Converter of the translational motion of the pusher into a rotary movement of the rotary part of the aerodynamic surface, comprising a cylinder with helical surfaces and interacting with them the finger, wherein the coil transducer comes with a second cylinder of the screw is passed surfaces other direction, than the helical surface of the first cylinder, and an additional finger interacting with the helical surfaces of the second cylinder, the cylinders are sequentially aligned and limited thrust bearing from mutually-and-forth movements, with one of the cylinders is connected with a fixed part of the aerodynamic surface, and the other rotary part, the plunger is placed in the inner cavity of the cylinder with the possibility of translational and rotational movements of the fingers mounted on the plunger and cooperating with the helical surfaces of the cylinder through the spherical bushing, and screw the surface of each cylinder is formed with lateral surfaces of the helical grooves made on diametrically opposite sides of the cylinder shells.

 

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