CN117755499A - Mechanism for popping and opening speed reducing parachute of aircraft - Google Patents

Abstract

The invention discloses a mechanism for ejecting and opening an aircraft deceleration parachute. It is a mechanism for ejecting and opening an aircraft deceleration parachute in complex aircraft wakes. It is mainly used for ejecting and deploying the parachute of aircraft that are landing at low altitude and high speed to improve the accuracy of parachute deployment time and the reliability of parachute deployment. Two sets of actuators are used to pop up the deceleration canopy, the deceleration parachute and the parachute opening mechanism. They have strong force, strong resistance to airflow interference, good time accuracy and controllability, and high time synchronization. The use of a deceleration parachute opening mechanism composed of compression springs, sliders, connecting rods, and weights can ensure that the deceleration parachute can quickly open in a short time after popping up to achieve a deceleration effect. This mechanism can effectively ensure that the parachute will eventually deploy effectively, improving the controllability of the parachute deployment time and the reliability of successful parachute deployment.

Description

A mechanism for ejecting and opening an aircraft's parachute

Technical field

The invention belongs to the technical field of aircraft, and mainly relates to an aircraft that needs to use a deceleration parachute to decelerate during flight, and to complete the mechanism for ejecting and opening the deceleration parachute.

Background technique

There are many aircraft that need to land at high speed during missions and use parachutes to slow down. These parachutes are often folded inside the aircraft before opening. Therefore, it is necessary to ensure that the parachute can eject the aircraft on time, reliably, and safely and open smoothly.

Common umbrella opening plans:

One is to add the main parachute to the guide parachute; the other is to blow the parachute open by blowing air. The limitations and shortcomings of these solutions are obvious, such as complex mechanisms, poor reliability, difficulty in control, and poor accuracy in parachute opening time.

Therefore, it is necessary to design an easy-to-deploy deceleration parachute ejection and opening mechanism that is easy to control, has good reliability, and has high parachute opening time accuracy.

Contents of the invention

The technical problem to be solved by the present invention is to design a mechanism for ejecting and opening the deceleration parachute of an aircraft, which can enable a high-speed landing aircraft to smoothly eject the deceleration parachute and open the deceleration parachute in a low-altitude dense atmosphere. This mechanism has a good time Accuracy and reliability.

In order to solve the above technical problems, the technical solution of the present invention is:

A mechanism for ejecting and opening an aircraft deceleration parachute, which is characterized in that it includes: a deceleration parachute cover, a connecting rod, a slider, a compression spring, an actuator nut, an actuator, a deceleration parachute, and a weight; the front end of the actuator The thread passes through the deceleration umbrella cover and cooperates with the actuator nut, and is connected with the deceleration umbrella cover through the actuator nut; the top of the connecting rod and the deceleration umbrella cover are connected together; there is a hook at the root of the connecting rod, which hooks the concave upper part of the slider groove, the protrusion of the heavy object is inserted into the lower groove of the slider. A compression spring is installed in the circular hole in the middle of the slider. The bulkhead is located on the outer periphery of the slider to limit the slider from being pushed outward by the force of the compression spring. The compression spring is compressed in Between the slider and the heavy object; the deceleration parachute is placed between the heavy object and the deceleration parachute cover and is connected to the heavy object.

Further, after the actuator receives the parachute opening command, the actuator outputs a force that acts on the deceleration canopy, and the deceleration canopy is pushed upward.

The principle of the present invention is:

The actuator is used to push the deceleration canopy, the parachute opening mechanism, and the deceleration parachute out of the complex wake area of the aircraft with a large force. At this time, the compression spring constraint is automatically released, the compression spring acts, the slider is ejected, the connecting rod and the weight are separated, and the deceleration parachute opens under the action of the gravity of the weight and the aerodynamic force of the deceleration parachute.

The invention has a simple structure, stable and reliable operation, versatile modularity, and has good application prospects for aircraft that need to open an umbrella to decelerate.

Description of the drawings

Figure 1 The composition of the aircraft deceleration parachute ejection and opening mechanism.

Figure 2 shows the state of the aircraft's deceleration parachute ejection and opening mechanism before action.

Figure 3 shows the state of the aircraft deceleration parachute ejection and opening mechanism after action.

Detailed ways

Specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. The following examples are used to illustrate the invention but are not intended to limit the scope of the invention.

The invention discloses a mechanism for ejecting and opening an aircraft deceleration parachute in a complex aircraft wake. It is mainly used for ejecting and deploying the parachute of aircraft that are landing at low altitude and high speed to improve the accuracy of parachute deployment time and the reliability of parachute deployment.

Two sets of actuators are used to pop up the deceleration canopy, the deceleration parachute and the parachute opening mechanism. They have strong force, strong resistance to airflow interference, good time accuracy and controllability, and high time synchronization. The use of a deceleration parachute opening mechanism composed of compression springs, sliders, connecting rods, and weights can ensure that the deceleration parachute can quickly open in a short time after popping up to achieve a deceleration effect. This mechanism can effectively ensure that the parachute will eventually deploy effectively, improving the controllability of the parachute deployment time and the reliability of successful parachute deployment.

An aircraft deceleration parachute ejects the parachute opening mechanism. The deceleration parachute cover, the deceleration parachute and the parachute opening mechanism are ejected together through an actuator. After ejection, the parachute opening mechanism acts and the deceleration parachute opens. The arrangement of the two actuators is symmetrical about the cabin symmetry axis, and the parachute opening mechanism is located on the symmetry axis.

When the actuator is inactive, the deceleration parachute cover is connected to the cabin where the deceleration parachute is located through the actuator; the parachute opening mechanism and the deceleration parachute are both connected to the deceleration parachute cover. The actuator acts to push out the deceleration canopy, and the deceleration canopy simultaneously takes the parachute opening mechanism and the deceleration parachute out of the cabin. The actuator layout is symmetrical about the symmetrical axis of the cabin, and the plane formed by the thrust action lines of the two actuators passes through the center of mass of the deceleration canopy, deceleration parachute, and parachute opening mechanism to ensure that the deceleration canopy can be parallel roll out. The two actuators are detonated by detonating cords drawn from the two detonating devices respectively, achieving a redundant design.

It consists of connecting rod, slider, compression spring and weight. After the deceleration canopy, parachute opening mechanism and deceleration parachute are pushed out of the cabin by the actuator, the compression spring restraint is released, the slider is ejected, the connecting rod and the weight are separated, and the deceleration parachute moves upward relative to the weight under the action of aerodynamic force. Movement, the parachute is opened, and the parachute is completed.

As shown in Figure 1, the present invention mainly includes: deceleration umbrella cover 1, screw 2, connecting rod 3, slider 4, compression spring 5, actuator nut 6, actuator 7, deceleration umbrella 8, weight 9.

The thread at the front end of the actuator 7 passes through the deceleration umbrella cover 1 and is connected with the deceleration umbrella cover 1 through the actuator nut 6. The connecting rod 3 passes through the threaded hole on the top and is connected to the deceleration umbrella cover 1 by screws 2. There is a hook at the root of the connecting rod 3, which hooks the upper groove of the slider 4. The protrusion of the weight 9 is inserted into the lower groove of the slider 4. A compression spring 5 is installed in the round hole in the middle of the slider 4. The bulkhead limits the slider. The distance between 4 and the weight 9, the compression spring 5 is compressed between the slider 4 and the weight 9. The deceleration parachute 8 is placed between the heavy object 9 and the deceleration parachute cover 1 and is connected to the heavy object 9 . In this way, the entire umbrella opening mechanism forms a whole.

Before the actuator 7 acts, the aircraft deceleration parachute pops up and the parachute opening mechanism is inside the aircraft, as shown in Figure 2. When the parachute opening mechanism receives the parachute opening command, the actuator 7 acts on the deceleration canopy 1 with a larger thrust, and the deceleration canopy 1 is pushed. The deceleration umbrella cover 1 drives the connecting rod 3, the connecting rod 3 drives the slider 4, the slider 4 drives the weight 9, and the deceleration umbrella 8 is sandwiched between the weight 9 and the deceleration umbrella cover 1. In this way, the deceleration canopy 1 together with the deceleration parachute 8, the weight 9, the connecting rod 3, the compression spring 5 and the slider 4 are pushed out of the complex wake area of the aircraft by the actuator 7. At this time, the restraint of the compression spring 5 originally provided by the bulkhead is released, the length of the compression spring 5 is restored, the slider 4 is ejected from the weight 9, and the connecting rod 3, slider 4 and weight 9 are separated, as shown in Figure 3. Then under the action of the gravity of the weight 9 and the aerodynamic force of the parachute 8, the parachute 8 opens.

Of course, the above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. In addition to the above embodiments, the present invention may also have other embodiments. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present invention.

The invention has been successfully applied to a certain aircraft and verified by ground tests and flight tests.

Claims (9)

1. A mechanism for ejecting and opening an aircraft drogue, comprising: the device comprises a speed reducing umbrella cover (1), a connecting rod (3), a sliding block (4), a pressure spring (5), an actuator nut (6), an actuator (7), a speed reducing umbrella (8) and a weight (9);

the screw thread at the front end of the actuator (7) passes through the speed reducing umbrella cover (1) to be matched with the actuator nut (6), and is connected with the speed reducing umbrella cover (1) through the actuator nut (6); the top of the connecting rod (3) is connected with the speed-reducing umbrella cover (1); the root of the connecting rod (3) is provided with a hook for hooking the upper groove of the sliding block (4), the protrusion of the heavy object (9) is inserted into the lower groove of the sliding block (4), a pressure spring (5) is arranged in a round hole in the middle of the sliding block (4), the bulkhead is positioned at the periphery of the sliding block (4) to limit the sliding block (4) to be outwards under the action of the pressure spring (5), and the pressure spring (5) is compressed between the sliding block (4) and the heavy object (9); the drogue (8) is arranged between the heavy object (9) and the drogue cover (1) and is connected with the heavy object (9).

2. A mechanism for ejecting and opening an aircraft drogue according to claim 1, wherein upon receipt of an instruction to open the drogue, the actuator outputs a force acting on the drogue (1), the drogue (1) being pushed upwardly.

3. The mechanism for ejecting and opening a drag parachute of an aircraft according to claim 1, wherein after the drag parachute cover and the drag parachute are pushed out of the cabin by the actuator, the restraint of the compression spring is released, the slide block is ejected, the connecting rod and the weight are separated, the drag parachute moves upwards relative to the weight under the action of pneumatic force, and the drag parachute is pulled out to complete the opening of the drag parachute.

4. The mechanism for ejecting and opening an aircraft drogue according to claim 1, further comprising a screw, wherein the connecting rod has a threaded hole through the top and is coupled to the drogue by the screw.

5. A mechanism for ejecting and opening an aircraft drogue according to claim 1 wherein the actuators comprise two actuators arranged symmetrically about an axis of symmetry of the nacelle, the drogue being located on the axis of symmetry.

6. A mechanism for ejecting and opening an aircraft drogue according to claim 1, characterised in that the mechanism is inside the aircraft cabin before the actuator (7) acts.

7. The mechanism for ejecting and opening an aircraft drogue according to claim 1, wherein the drogue cap is linked to the drogue body by the actuator when the actuator is not actuated; the mechanism and the drogue are connected with the drogue cover.

8. A mechanism for popping up and opening a drag parachute for an aircraft according to claim 1 wherein the actuators are arranged symmetrically about the axis of symmetry of the nacelle and the plane formed by the lines of action of the thrust of the two actuators passes through the center of mass of the drag parachute cover, drag parachute, and parachute opening mechanism.

9. The mechanism for ejecting and opening an aircraft drogue according to claim 5, wherein the two actuators are each detonated by a detonating cord from each of the two detonating devices.