RU2707482C1 - Rotating parachute - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to rotating parachutes. Rotating parachute comprises central part and blades with slings, blades for laying blades on central part, belt corrugation central part, corrugation belt cutter, system for connection of blade to central part by means of corrugation belt fixed on lower edge of central part in corrugated state. Webs for laying are made with possibility of their fixing with corrugation belt both on outer and inner sides of lower edge of central part dome.

EFFECT: invention is aimed at improving the safety and reliability of the parachute.

1 cl, 5 dwg

Description

The invention relates to parachute technology, in particular to rotating parachutes.

Rotating parachutes are known, having a central part and two, three or more blades, RU 2 028 255. As shown by experimental studies, due to the mutual negative aerodynamic influence of the blades with each other during rotation, increasing with increasing number of blades, the highest load-bearing characteristics have two-bladed parachutes. However, at the same time, centrifugal forces during rotation tend to stretch the central part, which leads to distortion and instability of its shape and, as a result, leading to instability of the parachute.

The closest technical solution selected as a prototype is a rotating parachute according to patent RU 2 569 991, containing the Central part and the blades with slings, as well as panels for laying the blades. However, in it, centrifugal forces during rotation tend to stretch the central part, which leads to distortion and instability of its shape and, as a result, leading to instability of the parachute. In such a parachute, there is a high probability of inflating the panels and blowing the blades out from under the panels with an incoming air stream during braking in the grooved state.

As shown by theoretical and experimental studies, the reliable operation of the parachute during commissioning can be achieved by dividing in time the braking stage, which is realized by the work of the central part of the parachute, and the stage of commissioning and filling the blades under conditions of reduced air flow rate.

The present invention is directed to solving a technical problem of eliminating the disadvantages of known rotating parachutes by providing a given level of overloads and strength integrity of the central part when brought into use over a wide range of air flow velocities.

The technical result is to increase the safety and reliability of the parachute in the process of putting it into operation with the simplicity of the design.

To ensure a given level of overloads and strength integrity of the central part when commissioning in a wide range of air flow velocities, the corrugation of the central part is used with the help of a corrugation belt (tape, cord), which reduces (riffles) the input circumference along the lower edge of the dome of the central part, which ensures reduction of loads during filling in a reefed state. At the stage of braking during operation of the Central part of the blade to maintain their strength integrity must be in a laid condition under the panels for installation. At the same time, to ensure the fixing of the laying panels and the blades below them relative to the central part, the same corrugation belt is used, which runs along the lower edge of the central part through the windows on the lower edges of the central part, the laying panel and the cutter mounted on the panel or on central part. At the end of the braking stage, depending on the set time or the set height, when the torch cuts through the corrugation belt, the blades must come into action, i.e. go from the laid state to the state of exit from under the panels for styling and subsequent filling. At the same time, for a more reliable and safe placement of the blades under the panel for laying, which reduces the likelihood of inflation of the panels and blowing of the blades from under the panels by the incoming air flow during braking in the grooved state, the laying panels are made with the possibility of their fastening with a corrugation belt both from the external and and on the inside of the lower edge of the dome of the Central part.

This result is achieved by ensuring the specified loads, overloads and strength integrity of the components of the parachute during the successive implementation of the braking stage and the stage of putting the blades into operation, as well as combining the functions of the corrugation belt for corrugating the central part at the stage of braking and fixing the blades in the laid state under the panels for laying, and at the stage of putting into operation the blades for separating part of the panels for laying from the central part when the torch is triggered, cutting the corrugation belt and trimming Nia central part of the parachute.

The essence of the invention lies in the fact that a rotating parachute containing the central part and the blades with slings, panels for laying the blades on the central part, the corrugation belt of the central part, the cutter of the corrugation belt, the system for connecting the blades to the central part by the corrugation belt fixed on the lower edge of the central part in the corrugated state, the laying panels are made with the possibility of their fastening by a corrugation belt both from the external and from the internal side of the lower edge of the dome of the central part.

    To ensure the breakdown, a cutter is used that fires after a specified time or at a given height and located on the laying panel or on the central part in the middle of the section between the edges of the laying panel. To ensure a guaranteed exit of the corrugation cord from the windows on the laying panels and the windows on the lower edge of the central part, the corrugation belt is connected to the lower edge of the central part by means of a fastener, while the length of the part of the corrugation belt in the area from the fastener to the torch should be less than the length of the part of the lower edge of the dome of the central part in a crushed state in the area from the mount to the nearest edge of the laying panel.

In FIG. Figures 1 to 4 show this parachute in the corrugated state of the central part, with the blades laid under the panel for installation. In FIG. 2 shows a view A from inside the canopy of the central part of the parachute. In FIG. 3 shows a view of the laying panel attached to the lower edge of the dome of the central part from the outside. Figure 4 shows a section bB (figure 3) showing the envelope of the panel for laying the lower edge of the dome of the Central part. Figure 5 shows the state of the parachute after trimming, i.e. after cutting the corrugation belt with a cutter.

The parachute consists of a central part 1 having a round, square or polygonal shape, and two (or maybe more) blades 10 (Fig. 5, Figs. 1 to 4, the blades are located under the panels for laying 4 and are not visible). The Central part 1 and the blades 10 are connected, respectively, by slings 2 and 3 with a load (Figs. 1-4). The central part 1 is corrugated with a corrugation belt 5, which is connected to the lower edge of the central part 1 using the fastening unit 7, and runs along the lower edge in the cover of the corrugation belt 11 (Figs. 1 and 5) before the placement of the laying sheet 4, then passes through windows 8 (FIGS. 1–3) on the laying panels 4, windows 9 (FIG. 5) on the lower edge of the central part 1, windows 12 on the laying panel from the inside (FIG. 2) through the cutter 6 (point C) to the second edge of the panel for laying 4, then also along the lower edge of the Central part 1 in the cover along the corrugation 11 to the attachment point 7 on the opposite side of the laying panel 4. Correspondingly, the second (and maybe the third and fourth) blades and laying panels are also corrugated 4. Thus, we have as many corrugation belts as there are blades and panels for styling. At the same time, bending around the lower edge of the central part 1 with a styling plate 4 reduces the likelihood and degree of inflation of the panels and blowing of the blades from under the panels by the incoming air flow during braking in the grooved state,

The parachute works as follows. After putting into operation and filling the central part 1 in a grooved state with the blades 10 laid under the panels for laying 4, the load-parachute system is braked for a predetermined time or to a predetermined height, while the attachment of the panels for laying 4 is shown from the outside and inside of the bottom the edge of the Central part 1 prevents the inflation of the panels 4 and the blowing of the blades 10 when exposed to air flow. After the cutter 6 is activated, which cuts the corrugation belts 5, the central part 1 is filled with the lower edge fully unfolded and the cut halves of the corrugation belt 5 fixed in the attachment points 7 (at opposite points) exit windows 8 on the mounting panels 4, windows 9 on the bottom the edge of the Central part 1, the windows 12 on the panels for laying 4 from the inside. The blades 10 are introduced into the inhibited air flow, rotor parachuting of the cargo-parachute system is filled and realized.

The indicated operation of the parachute was tested in flight experiments and the design scheme was introduced into the design of a number of rotating (rotor) parachute systems.

Claims (1)

A rotating parachute containing the central part and the blades with slings, panels for laying the blades on the central part, the corrugation belt of the central part, the cutter of the corrugation belt, the system for connecting the blades to the central part by the corrugation belt fixed on the lower edge of the central part in the corrugated state, characterized in that the laying panels are made with the possibility of fixing them with a corrugation belt both from the outer and inner sides of the lower edge of the dome of the central part.

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