RU2237598C2 - Method of opening control surfaces of guided projectile actuator unit and actuator unit for realization of this method - Google Patents

Abstract

FIELD: rocketry; guided projectiles.

SUBSTANCE: proposed method includes furnishing the electric signal for ignition of igniter squib, setting in motion the control surface opening mechanism, releasing the slots on fairing of actuator unit by breaking-off the sealing components and opening and locking the control surfaces. Opening the control surfaces is performed at time delay after breaking-off the sealing components. Actuator unit includes fairing with slots closed by sealing components for extension of spring-loaded control surfaces located on frames and folded inside actuator unit. Control surface opening mechanism has base with igniter squib and control surface moving members. Mounted on frame in area of slots of fairing are plates locked relative to frame by means of shear members having longitudinal slots for control surfaces, stops for free ends of control surfaces and thrust projections supported by pistons mounted in base perpendicularly to longitudinal axis of projectile and provided with slots for control surfaces. Clearance is provided between bottom of piston slot and leading edge of control surfaces. Pistons and control surfaces are made from different materials; control surfaces are made from harder material and pistons are made from softer material.

EFFECT: enhanced reliability of actuator.

3 cl, 3 dwg

Description

The invention relates to the field of rocketry and can be used for guided missiles fired from a gun barrel.

Known US patent 6073880A "Folding rudders for guided missiles and a system for opening the rudders" [1], taken as an analogue.

Bringing the folding rudders of a guided missile into working position is carried out in the following sequence:

after the rocket body leaves the launch tube, a signal is sent to a special drive mechanism;

a special drive mechanism releases the latches that hold the steering wheels in the folded position;

rudders under the action of torsion springs are brought into working position.

Folding rudders for guided missiles and a system for opening rudders consist of folding rudders, and in the stowed position are located in longitudinal grooves made on the rocket body and are held in grooves on the rocket body using latches. The rudders are spring-loaded and are brought into working position by means of torsion springs. After the rocket body leaves the launch tube, the latches are released using a special drive mechanism and the rudders are brought into working position under the action of torsion springs.

The disadvantage of this method and device is the limited scope only for missiles fired from the launch tube and do not require sealing the rocket body.

A known method of disclosing the rudders of the steering gear unit and the steering gear unit of the guided projectile 9M117, the ZUBK10 shot [2], is intended for a sealed rocket fired from the gun’s barrel, and is adopted for prototypes.

The steering unit is brought into working position in the following sequence:

after the rocket leaves the barrel, an electrical signal is supplied to ignite the pyrozapal;

the gases of the pyrozapal drive the rudder opening mechanism;

a mechanism for opening the rudders drives the rudders, turning them around the axis;

rudders tear off sealing elements, freeing fairing grooves;

steering wheels open and lock in position.

The steering drive unit contains a frame with spring-loaded rudders folded inwards, a fairing with grooves for the rudders to exit, closed by sealing shield elements. A mechanism for opening the rudders is installed on the frame, including a base with a pyrozapal and elements moving the rudders. The elements that move the rudders consist of a pusher having on one side grippers interacting with the lower edges of the rudders, on the other hand, the pusher is connected to a piston, which is driven by a pyrozapal. A pusher with a piston is installed at the base, along the longitudinal axis of the projectile. When folding and opening the rudders, they rotate around the axis.

The steering wheel opening method used has the following disadvantages:

significant loads on the elements of the disclosure mechanism, which act simultaneously and consist of the efforts to secure the shields, inertial loads from the rudders, shields, and the piston of the disclosure mechanism;

significant steering loads from the side shields.

In the steering drive unit adopted for the prototype, when the rudders are opened, the pusher strikes the lower edge of the blades, the blades tear off the shields on the upper surface. In the process of opening the rudders and shields on the rudders and the elements moving the rudders, significant forces act that load the bearings of the rudder axles and can lead to deformations that interfere with the operability of the steering drive unit, which reduces its reliability.

When using the steering wheel as an element that opens the flaps, due to its small thickness and the possibility of turning into the fairing groove when the position is folded, the point of application of force to detach the flap from the axis of symmetry of the flap is displaced, which in turn can lead to incomplete (one-sided) detachment shield.

A pusher strike on the edge of the rudders can lead to its deformation and violation of the aerodynamic characteristics of the rudder.

Significant efforts arising in the process of disclosing the rudders and shields require the rudders and elements moving the rudders to be made of high-strength alloys.

The objective of the present invention is to improve the reliability of the steering gear by unloading the elements of the steering gear unit from the forces acting on them when opening and breaking the sealing elements.

This problem is solved by the fact that in the method of opening the rudders of the steering gear block of a guided projectile, which includes applying an electric signal to ignite the pyrozapal, actuating the mechanism for opening the rudders, releasing grooves on the cowl of the steering gear block to exit the rudders by tearing off the sealing elements, opening and fixing the rudders , new is that a delay is introduced between the opening of the rudders and the separation of the sealing elements.

This method is implemented in the proposed steering gear unit of the guided projectile, including a fairing with grooves closed by sealing elements for exiting the spring-loaded rudders placed on the frame folded inside the steering gear unit, the mechanism for opening the rudders, including a base with pyrozapal and elements moving the rudders, is new that on the frame of the steering gear steering gear block in the area of the fairing grooves, trims are fixed, fixed relative to the frame by shear elements, containing longitudinal longitudinal grooves for the rudders, stops for the free ends of the rudders and persistent protrusions based on pistons installed at the base perpendicular to the longitudinal axis of the projectile and containing grooves for the rudders, and a gap was made between the bottom of the piston groove and the front edges of the rudders.

To prevent deformation of the rudders when they are opened, a steering gear drive unit is proposed in which the pistons and rudders are made of different materials, the rudders made of harder material, for example steel, and the pistons made of softer material, for example aluminum.

Improving the reliability of the steering gear by unloading the elements of the steering gear block from the forces acting on them when opening and opening the sealing elements is achieved by introducing a delay between the opening of the steering wheels and the separation of the sealing elements.

The introduction of planks with persistent protrusions supported by pistons for tearing off the sealing elements and installing them on the frame in the area of the fairing grooves and pistons installed at the base perpendicular to the longitudinal axis of the projectile allows you to not load the rudders and steering elements kinematically connected with the rudders in the process their disclosure by sealing elements.

The longitudinal grooves in the strips under the rudders serve to install the rudders in the folded position and exclude the possibility of turning the rudders in the fairing groove, the stops for the free ends of the rudders hold the rudders in the folded position.

The use of strips for tearing off the sealing elements ensures uniform tearing off of the sealing elements.

Delay is provided by introducing a gap between the bottom of the groove of the pistons and the front edges of the rudders.

The implementation of the pistons and rudders of different materials, and rudders of harder material than pistons, eliminates the deformation of the leading edge of the rudders and the violation of the aerodynamic characteristics of the rudders when they open to the working position.

The essence of the design is illustrated by drawings, where figure 1 shows a longitudinal section of the steering gear; figure 2 is a cross section along section aa; figure 3 is a section along BB.

On the frame 1 in the bearings 2 mounted trunnions 3 with rudders 4, spring-loaded through pin 5 by spring 6, fairing 7 with grooves 8 for the exit rudders. Shields 9 are installed in the grooves 8. A base 10 is installed on the frame 1 with radial channels 11 into which the pistons 12 are inserted. The channels 11 with the pistons 12 are connected to the pyrozapal cavity 13.

Between the flap 9 and the piston 12, a bar 14 is mounted on the frame 1, fixed to the frame 1 by a shear element 15. In the bar 14, grooves 16 are made for the rudders 4, an emphasis 17 for the free end of the rudders, a protrusion 18 for emphasis on the piston 12. A groove 19 is made in the piston 12. A gap 21 is made between the bottom of the groove 19 and the front edge 20 of the steering wheel 4.

The operation of the steering gear unit is as follows. In the folded position, the bar 14 is supported by the protrusion 18 on the piston 12, the rudders 4 are held in the folded position by the stop 17 of the bar 14. After the rocket leaves the barrel, an electric signal is applied to trigger the pyrozapal 13, gas is formed that acts on the pistons 12, causing them to move. The pistons 12 press on the straps 14 and cut off the shear element 15. The strap 14, under the action of the piston 12, tears off the shields 9 and releases the grooves for the rudders to exit. When moving the pistons, choosing a gap 21, hit the leading edge 20 of the rudders 4 and the rudders open and occupy the working position. In the working position, the rudders are fixed with a pin 5 under the action of the spring 6.

Thus, the proposed method and design of the steering drive unit can significantly increase its reliability by introducing a delay between the opening of the rudders and the separation of the sealing elements, ensuring a uniform separation of the sealing elements and eliminating loading of the rudders and steering elements kinematically connected with the rudders when the opening mechanism is triggered .

This improves the reliability of the guided projectile.

Sources of information

1. Inventions of the countries of the world. Issue 81, No.6, 2001

2. Shot ZUBK10 with a guided projectile 9M117. Technical description and instruction manual. Moscow. Military publishing house. 1987 year

Claims (3)

1. The method of disclosing the rudders of the steering gear unit of the guided projectile, comprising supplying an electric signal to ignite the pyrozapal, driving the mechanism for opening the rudders, releasing grooves on the cowl of the steering gear unit to exit the rudders by tearing off the sealing elements, opening and fixing the rudders, characterized in that the disclosure of the rudders is carried out with a time delay after separation of the sealing elements. 2. The steering gear unit of the guided projectile, comprising a fairing with grooves closed by sealing elements for exiting the spring-loaded rudders placed on the frame, folded inside the steering gear unit, a mechanism for opening the rudders, including a base with pyrozapal and elements moving the rudders, characterized in that it on the frame, in the area of the grooves of the fairing, installed strips, fixed relative to the frame by shear elements, containing longitudinal grooves for the rudders, stops for the free ends of the wheels and persistent rails ups based on pistons installed at the base perpendicular to the longitudinal axis of the projectile and containing grooves under the rudders, while a gap is made between the bottom of the piston groove and the front edges of the rudders. 3. The steering gear unit of the guided projectile according to claim 2, characterized in that the pistons and steering wheels are made of different materials, the steering wheels are made of harder material, and the pistons are made of a softer material.

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