A crosswise unloading and stabilizing mechanism for assisting in the opening of an umbrella

Abstract

The application discloses a kind of auxiliary guide umbrella's opening umbrella transverse unloading and stabilizing mechanism.The mechanism is the umbrella top tear strip of side branch auxiliary guide umbrella, for pulling the umbrella top of umbrella cloth of side branch auxiliary guide umbrella when umbrella cloth is inflated;Umbrella top tear strip is formed by folding and sewing, 2 layers of tear strip, one end of which is cut into two halves and sewn together, the other end is cut open when folding, and the two ends are fixed respectively;One end is fixed on the umbrella top of side branch auxiliary guide umbrella, and the other end is fixed on the connection of long and short sections of connecting rope.The application solves the stability problem of multiple auxiliary guide umbrellas, so that auxiliary guide umbrellas can be used in the form of multiple umbrella parallel combination, and solves the instability of side umbrella of multiple auxiliary guide umbrella parallel system and the problem of excessive opening umbrella dynamic load.

Description

Technical Field

[0001] This invention belongs to the field of aerospace technology, and in particular, it relates to a mechanism and method for lateral unloading and stabilization of an auxiliary guiding parachute. Background Technology

[0002] The main parachute deployment process of the heavy equipment airdrop system mainly relies on the auxiliary guide parachute system for pulling. At the moment the heavy equipment airdrop system leaves the aircraft, the auxiliary guide parachute system opens, generating aerodynamic force to pull all the main parachute packs, thereby opening the main parachute system and ensuring the synchronization of the main parachute deployment process.

[0003] The auxiliary guiding parachute system has been applied to various heavy equipment airdrop systems both domestically and internationally. Its technical configuration has always been a single parachute; due to technological limitations, it cannot be designed to allow multiple auxiliary guiding parachutes to be used in parallel.

[0004] Existing auxiliary pilot parachutes cannot solve the stability problem of multiple auxiliary pilot parachutes, so only one auxiliary pilot parachute can be used. The pulling force of the auxiliary pilot parachute to lift the main parachute is changed by changing the area of ​​the canopy. Therefore, the pulling force of the main parachute is relatively limited and cannot lift a large number of main parachute systems; moreover, the pulling force value is singular and cannot be changed, making it unsuitable for a large number of main parachute spans. Summary of the Invention

[0005] The purpose of this invention is to provide a lateral unloading and stabilization mechanism for the deployment of an auxiliary guide parachute. This stabilization mechanism can ensure stability in the deployment process and pull force of the auxiliary guide parachute in a heavy equipment airdrop system.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a lateral unloading and stabilization mechanism for an auxiliary guide umbrella, the mechanism being a tear strip on the top of the auxiliary guide umbrella, used to hold the top of the umbrella canopy of the auxiliary guide umbrella in place when the canopy is inflated; the tear strip on the top is formed into two layers by folding and sewing, one end of which is cut in half and sewn together, and the other end is cut open when folded, with both ends fixed respectively; one end is fixed to the top of the umbrella canopy of the auxiliary guide umbrella, and the other end is fixed to the connection point of the long and short sections of the connecting rope.

[0007] Furthermore, the length of the tear strip at the top of the umbrella is determined according to the size of the auxiliary guiding umbrella, and is 0.8 to 1.5 times the diameter of the canopy.

[0008] Furthermore, the main strength of the umbrella top tear strip is made of brocade ribbon with a width of 26mm and a tensile strength of 600kgf.

[0009] Furthermore, the suture method for the tear strip at the top of the umbrella is three rows of serrated stitches.

[0010] Furthermore, a U-shaped connecting ring is inserted at the knot of the reversing connecting rope. This ring connects the main and auxiliary guide parachute packs, and the tear strip at the top of the parachute is connected to it by a knot, forming an overall connection method.

[0011] Furthermore, the connection method of the tear strip at the top of the umbrella is as follows: Pass one end of the tear strip through the top of the auxiliary guide umbrella and tighten it with a fixing loop knot; then, fold the tear strip in the middle in a zigzag shape, tie it with a breakable rope core, tighten it with a flat knot, and cut off the excess rope end; after the folding is completed, the folded part is about 1m away from the fixing loop knot and about 1.2m away from the free rope end; then, when packaging the auxiliary guide umbrella, leave the free rope end of the tear strip outside the auxiliary guide umbrella package.

[0012] Compared with the prior art, the present invention has the following significant advantages: (1) The present invention solves the stability problem of multiple auxiliary guide parachutes, so that multiple auxiliary guide parachutes can be used in parallel combination. (2) The present invention solves the problems of instability of the side parachutes and excessive dynamic load when opening the parachutes in the parallel system of multiple auxiliary guide parachutes. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the tear strip at the top of the umbrella.

[0014] Figure 2 This is a diagram showing the working status of the dual auxiliary guide umbrella system.

[0015] Figure 3 This is a diagram showing the installation method of the auxiliary guide parachute bag, reversing rope, and canopy tear strip. Detailed Implementation

[0016] The present invention discloses a lateral unloading and stabilization mechanism for an auxiliary guide umbrella, the main component of which is a tear strip on the top of the auxiliary guide umbrella. The tear strip on the top is used to hold the top of the canopy supporting the auxiliary guide umbrella in place during canopy inflation, preventing the top of the canopy from collapsing.

[0017] The length of the tear strip at the top of the umbrella is determined according to the size of the auxiliary guide umbrella, generally 0.8 to 1.5 times the diameter of the canopy. Two layers of tear strips are formed through folding and sewing. One end of the strip is cut in half and sewn together. The other end is cut open during folding, and both ends are fixed: one end is fixed to the top of the auxiliary guide umbrella canopy, and the other end is fixed to the junction of the long and short sections of the connecting rope.

[0018] The main body strength and suture tear strength of the tear strip have been rigorously designed. The main body strength uses 26mm wide silk ribbon with a tensile strength of 600kgf, ensuring the area, strength, and elongation of the sutured area. The suture method is a three-row serrated stitch code. After a tensile strength test, the suture tear strength is stable at 50kgf±10kgf, which can provide a stable force value and does not hinder the full opening of the auxiliary guide umbrella.

[0019] Figure 2 This is a schematic diagram of a typical parallel configuration of multiple auxiliary guide parachutes. 4 represents the canopy top tear strip, which controls the top of the side auxiliary guide parachutes. In the diagram, 1 is the reversing connecting rope, 2 is the main auxiliary guide parachute pack, 3 is the secondary auxiliary guide parachute pack, 4 is the canopy top tear strip, 5 is the main auxiliary guide parachute, 6 is the secondary auxiliary guide parachute, 7 is the center rope, and 8 is the auxiliary guide parachute connecting rope.

[0020] For the installation instructions of the two auxiliary guide parachute packs, reversing lines, and canopy tear strips, please refer to [link / reference]. Figure 3 In the diagram, 1. Reversing connecting rope, 2. Main and auxiliary guide parachute packs, 3. Support auxiliary guide parachute packs, and 4. Top tear strip.

[0021] At the knot of the reversing connecting rope, a U-shaped connecting ring (located in the middle of the image) is inserted. The shape and size of this ring are specially designed to ensure a secure fixation while connecting the main and auxiliary guide parachute packs. The canopy top tear strip is then knotted and connected to it, forming a complete connection.

[0022] The connection method for the canopy top tear strip is as follows: Pass one end of the auxiliary guide umbrella tear strip through the top of the auxiliary guide umbrella and tighten it with a securing loop knot. Then, zigzag back the middle of the auxiliary guide umbrella tear strip, tie it with a breakable cord core, tighten it with a flat knot, and cut off any excess cord ends. After folding back, the folded portion should be approximately 1m from the securing loop knot and approximately 1.2m from the free cord end. Subsequently, when packaging the auxiliary guide umbrella, the free cord end of the auxiliary guide umbrella tear strip should be left outside the auxiliary guide umbrella package for easy assembly in subsequent processes.

[0023] The actual size prototype of this design has been verified by heavy-duty airdrop, and its performance meets the design requirements. It has the ability to realize the parallel connection of multiple auxiliary guide parachutes and the side auxiliary guide parachutes to remain stable during the opening process without the parachute top collapsing.

[0024] In summary, the tear strip at the top of the side-supported guide parachute ensures that the parachute remains stable and the top does not collapse during deployment.

Claims

1. A lateral unloading and stabilization mechanism for an auxiliary guiding parachute, characterized in that: This mechanism is the tear strip at the top of the auxiliary guide umbrella, used to hold the top of the canopy of the auxiliary guide umbrella in place when the canopy is inflated. The tear strip at the top of the umbrella is formed by folding and sewing, creating two layers of tear strips. One end of the strip is cut in half and sewn together, while the other end is cut open during folding, and both ends are fixed separately. One end is fixed to the top of the auxiliary guide umbrella canopy, and the other end is fixed to the connection point of the long and short sections of the connecting rope.

2. The lateral unloading and stabilization mechanism for the auxiliary guiding parachute according to claim 1, characterized in that: The length of the tear strip at the top of the umbrella is determined according to the size of the auxiliary guiding umbrella, and is 0.8 to 1.5 times the diameter of the canopy.

3. The lateral unloading and stabilization mechanism for the auxiliary guiding parachute according to claim 1, characterized in that: The main strength of the umbrella top tear strip is made of 26mm wide silk ribbon with a tensile strength of 600kgf.

4. The lateral unloading and stabilization mechanism for the auxiliary guiding parachute according to claim 1, characterized in that: The tear strip at the top of the umbrella is sewn with three rows of serrated stitches.

5. The lateral unloading and stabilization mechanism for the auxiliary guiding parachute according to claim 1, characterized in that: A U-shaped connecting ring is inserted at the knot of the reversing connecting rope. This ring connects the main and auxiliary guide parachute packs, and the tear strip at the top of the parachute is connected to it by a knot, forming an overall connection method.

6. The lateral unloading and stabilization mechanism for the auxiliary guiding parachute according to claim 5, characterized in that: The connection method for the tear strip on the umbrella top is as follows: Pass one end of the tear strip through the top of the auxiliary guide umbrella and tighten it with a fixing loop knot; then, fold the tear strip back in a zigzag shape in the middle, tie it with a breakable rope core, tighten it with a flat knot, and cut off the excess rope end; after the folding is completed, the folded part should be about 1m away from the fixing loop knot and about 1.2m away from the free rope end; then, when packaging the auxiliary guide umbrella, leave the free rope end of the tear strip outside the auxiliary guide umbrella package.

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