CN217864772U

CN217864772U - Load shedding parachute

Info

Publication number: CN217864772U
Application number: CN202221690736.2U
Authority: CN
Inventors: 李轲; 雷小平
Original assignee: AVIC Aerospace Life Support Industries Ltd
Current assignee: AVIC Aerospace Life Support Industries Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-11-22
Anticipated expiration: 2032-06-29

Abstract

The utility model provides a load-shedding parachute, which comprises a parachute canopy (1), an auxiliary canopy (2), a connecting rope (3), a restraint rope (4), a cutter (5) and a rope buckle (6), wherein the auxiliary canopy (2) is arranged at the central position of the parachute canopy (1), the periphery is provided with the drawable restraint rope (4), at least four connecting ropes (3) are symmetrically arranged, one end of the auxiliary canopy is sewed with the rope buckle (6) and is sleeved with the restraint rope (4), and the other end of the auxiliary canopy is connected with the bottom edge of the parachute canopy (1); the restriction rope (4) is provided with a cutter (5) to cut off the restriction rope (4) to release the restriction on the parachute canopy (1), and the parachute canopy (1) is inflated and fully inflated. The utility model discloses the reliability that can effectual promotion large-scale parachute open reduces the parachute-opening impact force, and guarantee system safety steadily lands, has better using value.

Description

Load shedding parachute

Technical Field

The utility model belongs to the lifesaving field, concretely relates to deloading parachute.

Background

Parachute opening process is the process of an instantaneous explosion, the goods and materials speed that will make the instantaneous input reduces, will produce great relative impact force between parachute and object, this kind of impact force either can make the parachute damage, or can make the air-drop goods and materials damage, but when heavy equipment air-drop, generally all can use multistage parachute to slow down, and final use's landing parachute area is generally all great, in order to satisfy the safe input of equipment goods and materials, will take some measures, make the reliability of large-scale parachute when expanding high, and at the in-process of full area expansion, and the relative motion that produces between the air-drop goods and materials is less, can satisfy the safety requirement of equipping the parachute on the one hand, on the other hand, reliable parachute opening performance, can ensure that the parachute is fully opened according to program control, the air-drop goods and materials safety steadily falls and be unlikely to being damaged. Although the multi-stage parachute deceleration can effectively reduce parachute opening impact, the system is heavy in weight, high in complexity and poor in inflation performance. For the expansion of a large parachute, the load can be effectively relieved, and the parachute opening and expanding performance is good, so that the key for the stable descending success of the system is realized.

In conclusion, the technical problems in the prior art are that the large parachute has poor inflation performance and large instantaneous expansion inflation impact.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: provided is a load-reducing parachute capable of assisting the opening of a large parachute at a high speed and reducing the force of opening the parachute.

The utility model adopts the technical scheme that:

the utility model has the advantages and beneficial effects: the method for assisting the parachute opening and inflation of a large parachute and reducing parachute opening impact is characterized in that an auxiliary canopy similar to the shape of the large parachute is designed on the inner side of the large parachute, the auxiliary canopy is connected with the bottom edge of the parachute, the parachute canopy is retracted inwards, the parachute canopy is inflated in the initial stage of parachute opening, due to the plane shape of the auxiliary canopy, air flow is overflowed, the canopy on the bottom edge of the large parachute can be diffused outwards, and meanwhile, the parachute opening time is prolonged and the parachute opening impact force is reduced by using a mode of restraining the canopy. The method can effectively improve the reliability of opening the large parachute, reduce the parachute opening impact force, ensure the safe and stable landing of the system and have better application value.

Drawings

The following further describes the present invention with reference to the drawings and examples.

Fig. 1 is a schematic view of the parachute auxiliary canopy unfolding provided by the embodiment of the present invention.

Fig. 2 is a schematic view of the auxiliary canopy restraint canopy structure of the present invention.

Fig. 3 is a schematic view of the parachute canopy of the present invention fully extended.

In the figure, 1, parachute canopy, 2, auxiliary canopy, 3, connecting rope, 4, restraining rope, 5, cutter, 6, rope fastener

Detailed Description

The present invention is further described in detail by the following embodiments:

as shown in fig. 1 to 3, the parachute system provided by the embodiment of the present invention is illustrated in the state of ready before operation and after complete operation. When the parachute is designed, the corresponding connecting rope 3 is designed at the rope buckle at the bottom end of the parachute canopy 1, the planar circular auxiliary canopy 2 consistent with the appearance of the parachute is designed at the center of the parachute canopy, and when the parachute canopy 1 is completely unfolded, the auxiliary canopy 2 and the connecting rope 3 are unfolded and are consistent with the diameter of the parachute. Before preparation, the constraining rope 4 penetrates through the rope buckles 6 on the connecting ropes 3 to encircle a circle, the cutter 5 is connected to the constraining rope 4, two ends of the constraining rope 4 are fixedly bound, and at the moment, the rope buckles 6 of the connecting ropes 3 are tightened inwards by the constraining rope 4, so that the area of the parachute canopy 1 which can be actually unfolded is reduced.

The auxiliary canopy is designed at the bottom end of the canopy of the parachute, the parachute is unfolded instantaneously at a large parachute, in order to enable limited air flow to act on an air inlet at the bottom of the parachute, the constraint rope is used for constraining the whole area in the parachute, on one hand, the instant unfolding impact force of the whole area can be reduced, on the other hand, the air flow acting on the auxiliary canopy is outwards diffused in the surrounding overflowing process, a horn mouth is formed, and the large parachute is internally inflated when being unfolded at the bottom of the large parachute. When the bottom edge of the parachute canopy is unfolded outwards by the rapid air flow, the cutter starts to work in a delayed mode, the restrained parachute canopy is further released, the parachute canopy at the bottom edge of the parachute already forms a horn mouth under the action of the auxiliary canopy, the whole parachute canopy can be rapidly fully expanded, and the reliability of the air inflation performance of the large parachute canopy is improved. The requirements of the large parachute on reliability of parachute opening and load shedding are met.

The separator is equipped commonly used separator for the umbrella class, and the structure is cylindrical, and one end has the round hole, and round hole department is provided with sharp blade and powder, and the other end starts the pull pin for the section installation, and it is fixed with starting the pull pin that about rope passes the round hole, and the sharp blade of round hole department is released in the explosion of inner wall powder pulls out the pull pin at the parachute-opening in-process and starts, and the back is arrived in the delay time, and the sharp blade of round hole department is released in the explosion of inner wall powder, cuts off the about rope that passes the separator hole, releases the canopy.

The working principle is as follows:

when the parachute is opened, firstly, the auxiliary canopy 2 is unfolded against the wind, and compared with actual air-dropped objects, the auxiliary canopy 2 is small, the airflow is in contact with the auxiliary canopy 2 and then can be diffused to the periphery, and then the bottom edge of the parachute canopy 1 is blown open, because the auxiliary canopy 2 is connected with the parachute canopy 1 through the connecting rope 3, at the moment, the connecting rope 3 is restrained by the restraining rope 4, the parachute can be inflated in a bulb shape, after the system works for several seconds, the cutter 5 starts to work, the restraining rope 4 is cut off, after the connecting rope 3 is released, the parachute canopy 1 is diffused outwards, and the whole parachute canopy 1 is fully inflated.

Claims

1. A load shedding parachute comprises a parachute canopy (1), an auxiliary canopy (2), connecting ropes (3), restraint ropes (4), a cutter (5) and rope buckles (6), and is characterized in that the auxiliary canopy (2) is arranged in the center of the parachute canopy (1), the restraint ropes (4) capable of being pulled and pulled are arranged along the periphery, at least four of the connecting ropes (3) are symmetrically arranged, the rope buckles (6) are sewn at one end of each connecting rope and are sleeved with the restraint ropes (4), and the other end of each connecting rope is connected with the bottom edge of the parachute canopy (1); the restriction rope (4) is provided with a cutter (5) to cut off the restriction rope (4) to release the restriction on the parachute canopy (1), and the parachute canopy (1) is inflated and fully inflated.

2. A load shedding parachute according to claim 1, wherein the length of the restraining cord (4) is smaller than the deployment diameter of the parachute canopy (1) so that the actual deployable canopy (1) area of the parachute canopy (1) is reduced.

3. A parachute according to claim 1, wherein the restraining lines (4) are tied at both ends.

4. A load shedding parachute according to claim 1, wherein the auxiliary canopy (2) has the same shape as the parachute canopy (1), and the deployment area is smaller than the area of the outer opening of the parachute canopy (1) after deployment.

5. A parachute according to claim 1, wherein the cutter (5) is cylindrical, one end of the cutter is provided with a round hole, a sharp blade and gunpowder are arranged at the round hole, the other end of the cutter is provided with a starting pull pin for installing the cross section, and the restraining rope passes through the round hole and is fixed with the starting pull pin.