CN117755499A - Mechanism for popping and opening speed reducing parachute of aircraft - Google Patents
Mechanism for popping and opening speed reducing parachute of aircraft Download PDFInfo
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- CN117755499A CN117755499A CN202311660004.8A CN202311660004A CN117755499A CN 117755499 A CN117755499 A CN 117755499A CN 202311660004 A CN202311660004 A CN 202311660004A CN 117755499 A CN117755499 A CN 117755499A
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Abstract
The invention discloses a mechanism for ejecting and opening an aircraft drogue, which is used for ejecting and opening the aircraft drogue in a complex aircraft wake. The parachute opening device is mainly used for popping up and opening the parachute of the aircraft which falls at a low altitude and high speed, improves the accuracy of parachute opening time and improves the reliability of parachute opening. The two sets of actuators are adopted to jointly act and pop up the parachute cover, the parachute and the parachute opening mechanism, so that the acting force is large, the airflow interference resistance is strong, the time precision controllability is good, and the time synchronism is high. The parachute opening mechanism consisting of the pressure spring, the sliding block, the connecting rod and the heavy object is adopted, so that the parachute can be ensured to be opened rapidly in a short time after being ejected out, and a deceleration effect is achieved. The mechanism can effectively ensure the final effective opening of the drogue parachute, and improves the controllability of the opening time and the reliability of successful opening.
Description
Technical Field
The invention belongs to the technical field of aircrafts, and mainly relates to an aircraft which needs to be decelerated by a drogue in flight, and a mechanism for completing the ejection and opening of the drogue.
Background
There are many aircraft that need to land at high speeds during mission and are decelerated using drag parachutes that tend to collapse inside the aircraft before opening. It is therefore necessary to ensure that the drogue can be ejected out of the aircraft on time, reliably and safely and be opened smoothly.
Common umbrella opening schemes:
firstly, a main umbrella is added by a guiding umbrella; secondly, the umbrella is opened by blowing. The limitations and disadvantages of these schemes are obvious, such as complex mechanism, poor reliability, difficult control, poor accuracy of the time of opening the umbrella, etc.
Therefore, there is a need to design a mechanism for easily controlling and opening the umbrella with high reliability and precision.
Disclosure of Invention
The technical problem to be solved by the invention is to design a mechanism for popping and opening the parachute of the aircraft, which can smoothly pop up the parachute and open the parachute of the aircraft falling at high speed in low-altitude dense atmosphere, and has good time accuracy and reliability.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a mechanism for ejecting and opening an aircraft drogue, comprising: the device comprises a speed reducing umbrella cover, a connecting rod, a sliding block, a pressure spring, an actuator nut, an actuator, a speed reducing umbrella and a heavy object; the screw thread at the front end of the actuator passes through the speed reducing umbrella cover to be matched with the actuator nut, and is connected with the speed reducing umbrella cover through the actuator nut; the top of the connecting rod is connected with the speed reducing umbrella cover; the root of the connecting rod is provided with a hook for hooking the upper groove of the sliding block, the protrusion of the heavy object is inserted into the lower groove of the sliding block, a pressure spring is arranged in a round hole in the middle of the sliding block, the bulkhead is positioned at the periphery of the sliding block to limit the sliding block from outwards under the action of the pressure spring, and the pressure spring is compressed between the sliding block and the heavy object; the drogue is arranged between the heavy object and the drogue cover and is connected with the heavy object.
Further, after the actuator receives an umbrella opening instruction, the actuator outputs acting force to act on the parachute cover, and the parachute cover is pushed upwards.
The principle of the invention is as follows:
the parachute cover, the parachute opening mechanism and the parachute are pushed out of a complex wake flow area of the aircraft by adopting an actuator with larger acting force. At the moment, the restraint of the pressure spring is automatically released, the pressure spring acts, the sliding block is ejected, the connecting rod is separated from the heavy object, and the drogue is opened under the action of the gravity of the heavy object and the pneumatic force of the drogue.
The invention has simple structure, stable and reliable operation, modularized universality and good application prospect, and an aircraft needing parachute opening and deceleration is provided.
Drawings
FIG. 1 illustrates the assembly of an aircraft drogue parachute pop-up parachute opening mechanism.
Fig. 2 shows the state of the parachute pop-up and parachute-opening mechanism of the aircraft before the action.
FIG. 3 shows the parachute pop-up and parachute opening mechanism of the aircraft in a state after the action
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The invention discloses a mechanism for ejecting and opening an aircraft drogue in a complex aircraft wake. The parachute opening device is mainly used for popping up and opening the parachute of the aircraft which falls at a low altitude and high speed, improves the accuracy of parachute opening time and improves the reliability of parachute opening.
The two sets of actuators are adopted to jointly act and pop up the parachute cover, the parachute and the parachute opening mechanism, so that the acting force is large, the airflow interference resistance is strong, the time precision controllability is good, and the time synchronism is high. The parachute opening mechanism consisting of the pressure spring, the sliding block, the connecting rod and the heavy object is adopted, so that the parachute can be ensured to be opened rapidly in a short time after being ejected out, and a deceleration effect is achieved. The mechanism can effectively ensure the final effective opening of the drogue parachute, and improves the controllability of the opening time and the reliability of successful opening.
The parachute opening mechanism is characterized in that a parachute cover, a parachute and the parachute opening mechanism are popped out together through an actuator, and after the parachute cover, the parachute and the parachute opening mechanism are popped out, the parachute opening mechanism acts and the parachute is opened. The two actuators are arranged symmetrically about the symmetry axis of the cabin body, and the umbrella opening mechanism is positioned on the symmetry axis.
When the actuator is not in action, the parachute cover is linked with the cabin body where the parachute is positioned through the actuator; the parachute opening mechanism and the parachute are connected to the parachute cover. The actuator acts to push out the parachute cover, and the parachute cover brings the parachute opening mechanism and the parachute out of the cabin. The actuators are arranged symmetrically about the symmetry axis of the cabin body, and the plane formed by the thrust action lines of the two actuators passes through the mass center of the whole of the parachute cover, the parachute and the parachute opening mechanism so as to ensure that the parachute cover can be pushed out in parallel. The two actuators are detonated by detonating cords respectively led out by the two detonating devices, so that redundant design is realized.
It consists of a connecting rod, a sliding block, a pressure spring and a weight. After the parachute cover, the parachute opening mechanism and the parachute are pushed out of the cabin body by the actuator, the constraint of the pressure spring is released, the sliding block is ejected out, the connecting rod is separated from the heavy object, the parachute moves upwards relative to the heavy object under the action of pneumatic force, and the parachute is pulled open to complete parachute opening.
As shown in fig. 1, the present invention mainly includes: the device comprises a speed reducing umbrella cover 1, screws 2, 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 parachute cover 1 and is connected with the parachute cover 1 through the actuator nut 6. The connecting rod 3 is connected with the speed reducing umbrella cover 1 through the threaded hole at the top by the screw 2. 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, the round hole in the middle part of the sliding block 4 is internally provided with a pressure spring 5, and the pressure spring 5 is compressed between the sliding block 4 and the heavy object 9 because the distance between the sliding block 4 and the heavy object 9 is limited by the bulkhead. The drogue 8 is arranged between the heavy object 9 and the drogue cover 1 and is connected with the heavy object 9. Thus the whole umbrella opening mechanism forms a whole.
Before the actuator 7 acts, the parachute-in-flight mechanism pops up inside the aircraft, as shown in fig. 2. The parachute opening mechanism receives a parachute opening instruction, the actuator 7 acts on the parachute cover 1 by larger thrust, and the parachute cover 1 is pushed. The speed reducing umbrella cover 1 drives the connecting rod 3, the connecting rod 3 drives the sliding block 4, the sliding block 4 drives the heavy object 9, and the speed reducing umbrella 8 is clamped between the heavy object 9 and the speed reducing umbrella cover 1. The whole of the parachute cover 1, the parachute 8, the heavy object 9, the connecting rod 3, the pressure spring 5 and the sliding block 4 is pushed out of a complex wake area of the aircraft by the actuator 7. At this time, the restraint of the compression spring 5, which is 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, the slider 4 and the weight 9 are separated, as shown in fig. 3. The drogue 8 is then opened under the force of gravity from the weight 9 and pneumatic force from the drogue 8.
Of course, the above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the scope of the invention.
The invention is successfully applied to an aircraft, and is verified by ground test and flight test.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311660004.8A CN117755499A (en) | 2023-12-06 | 2023-12-06 | Mechanism for popping and opening speed reducing parachute of aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311660004.8A CN117755499A (en) | 2023-12-06 | 2023-12-06 | Mechanism for popping and opening speed reducing parachute of aircraft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117755499A true CN117755499A (en) | 2024-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311660004.8A Pending CN117755499A (en) | 2023-12-06 | 2023-12-06 | Mechanism for popping and opening speed reducing parachute of aircraft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117755499A (en) |
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2023
- 2023-12-06 CN CN202311660004.8A patent/CN117755499A/en active Pending
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