CN108238257B

CN108238257B - Drag parachute throwing mechanism with automatic parachute throwing function after failure

Info

Publication number: CN108238257B
Application number: CN201711340009.7A
Authority: CN
Inventors: 黄方略; 谷云峰; 单忠茂; 马天力; 樊健平
Original assignee: AVIC Chengdu Aircraft Design and Research Institute
Current assignee: AVIC Chengdu Aircraft Design and Research Institute
Priority date: 2017-12-14
Filing date: 2017-12-14
Publication date: 2021-02-09
Anticipated expiration: 2037-12-14
Also published as: CN108238257A

Abstract

The invention belongs to an aircraft drag parachute system, and particularly relates to a drag parachute throwing mechanism with a function of automatic parachute throwing after a fault. The anti-explosion device is composed of an explosion bolt, an electric detonator, a pin pushing device, an electro-conductive explosion assembly and a false locking device, wherein the explosion bolt is connected with a machine body structure and a rear cover of a resistance umbrella cabin, the false locking device is connected with a machine body support and a hanging ring of the resistance umbrella, the pin pushing end of the pin pushing device is installed on the false locking device through threads, the output end of the electro-conductive explosion assembly is connected with the explosion bolt and the other end of the pin pushing device, and the input end of the electro-conductive explosion assembly is connected with the electric detonator. The 'failure-safety' function can be realized only by adding one parallel ignition circuit in the traditional non-electric explosion transmission system, a resistance parachute bay cover sensor and a related logic judgment system are not required to be added, the system logic is simple, all functions can be realized only by relying on an initiating explosive system, and the structural space and the weight for installing the sensor and a cable of the sensor are saved.

Description

Drag parachute throwing mechanism with automatic parachute throwing function after failure

Technical Field

The invention belongs to an aircraft drag parachute system, and particularly relates to a drag parachute throwing mechanism with a function of automatic parachute throwing after a fault.

Background

A drag parachute throwing device on an existing aerospace craft is not provided with a parachute throwing function after the parachute is mistakenly put, or a hatch cover position sensor and a corresponding electric system are added for achieving the parachute throwing function. Both of these approaches either lose the safety of the aircraft platform or greatly increase the space, weight and complexity of the system occupied by the drag parachute system, losing the performance of the aircraft platform.

Disclosure of Invention

The invention has simple and reliable structure, and is suitable for a resistance umbrella system which is not frequently used and has high requirements on space, weight and reliability.

The utility model provides a drag parachute jettison mechanism of automatic parachute throwing function after taking trouble, by explosion bolt (1), electric detonator (2), promote ware (3), nonelectric explosion subassembly (4), false locking device (5) are constituteed, organism structure and drag parachute cabin back lid are connected to explosion bolt (1), false locking device (5) are connected organism support and drag parachute link, the promotion end of promoting ware (3) is installed on false locking device (5) through the screw thread, the other end of explosion bolt (1) and promotion ware (3) is connected to the output of nonelectric explosion subassembly (4), nonelectric explosion subassembly (4) input is connected electric detonator (2).

The pushing pin device (3) is composed of a pushing pin (521) and a pushing pin device shell (522), the pushing pin (521) is of a piston and rod body combined structure, the pushing pin device shell (522) is of a piston cylinder structure with one end closed and containing gunpowder, and the non-closed end is provided with a hexagon and threads to be assembled with a false lock bolt (501) in a false lock device (5).

The false locking device (5) consists of a false locking bolt (501), a self-locking nut (502), a gasket (503), a bushing (504), a clearance adjusting gasket (505), an inner ring (511) and a shaft neck (512); the false lock bolt (501) is a hollow hexagon bolt, the top surface of the hexagon bolt is provided with a blind hole, an internal thread with a certain depth is arranged in the blind hole and used for installing the pin pushing device (3), the polished rod part of the false lock bolt (501) is provided with two shearing damage grooves, and the groove distance is equal to the width of the inner ring (511); the bushing (504) is a flanging bushing and is arranged in the double-lug hole of the machine body support, and the flanging is positioned on the inner side of the double lugs; the thickness of the clearance adjusting gasket (505) is adjusted according to assembly requirements, and the false lock bolt (501), the self-locking nut (502), the gasket (503), the bushing (504) and the clearance adjusting gasket (505) are matched to install the inner ring (511) and the shaft neck (512) on the machine body support.

Advantages and technical problems to be solved

The invention is realized by arranging a false lock device in the cover throwing and umbrella placing device:

1. when the aircraft flies in the air, the false lock device automatically throws the parachute under the action of the aerodynamic resistance of the drag parachute under the condition that the drag parachute is mistakenly put due to various factors, so that the flying safety is guaranteed;

2. the false lock is changed into the true lock when the umbrella releasing function is executed, and the aerodynamic drag of the drag parachute can be ensured to be decelerated for the airplane normally when the parachute is normally released.

The false lock device can realize the 'failure-safety' function only by adding one parallel ignition circuit in the traditional non-electric explosion transmission system without adding a resistance parachute bay cover sensor and a related logic judgment system, the system logic is simple, all functions can be realized only by depending on an initiating explosive system, and the structural space and the weight for installing the sensor and a cable thereof are saved.

Drawings

FIG. 1 installation of drag parachute deployment mechanism

FIG. 2 composition of drag parachute throwing mechanism

FIG. 3 false lock device (false lock state)

FIG. 4 false lock device (true lock state)

FIG. 5 false lock bolt

In the figure: explosive bolt 1, electric detonator 2, push pin 3, non-electric detonator assembly 4, dummy lock device 5, dummy lock bolt 501, self-locking nut 502, washer 503, bushing 504, gap adjusting washer 505, inner ring 511, journal 512, push pin 521, push pin housing 522.

Detailed Description

The drag parachute throwing and releasing device has the working process as follows:

when the false locking device works normally, the two electric detonators 2 are electrified, the electric detonators 2 work and ignite the 2 x 4-path non-electric detonation component 4, the detonation wave is transmitted to the three explosion bolts 1 and the pin pushing device 3 by the detonation component 4, the explosion bolts 1 and the pin pushing device 3 work synchronously or work sequentially according to a program under the control of delay powder (the pin pushing device works after working the explosion bolts first), the pin pushing device 3 pushes the pin pushing 521 into the false locking bolt 501, so that the false locking device is converted from a false locking state to a true locking state, and at the moment, the false locking device can bear the normal pneumatic resistance load of the resistance umbrella. The three explosive bolts work to throw out the rear cover of the drag parachute cabin and release the drag parachute, and the drag parachute transmits pneumatic resistance to the aircraft body through the false locking device to decelerate the aircraft.

The failure state is that the drag parachute is mistakenly released by various factors to generate pneumatic resistance when the aircraft flies in the air, so that the flight safety is directly endangered, at the moment, the drag parachute releasing device is not ignited, the false locking device is in a 'false locking' state, when the pneumatic resistance is applied to the false locking bolt 501 through the shaft neck 512 and the inner ring 511, two shearing damage grooves on the false locking bolt are damaged, as the pushing pin 521 is not pushed into the false locking bolt 501 by the pushing pin device 3, the false locking bolt 501 cannot bear the load after the shearing damage grooves are damaged, the pneumatic resistance pulls the drag parachute away from the aircraft body, and the drag parachute releasing mechanism automatically executes the parachute releasing function under the condition of the failure parachute releasing, so that the flight safety is realized.

Claims

1. The utility model provides a drag parachute throwing mechanism with automatic parachute throwing function behind trouble, by explosion bolt (1), electric initiating explosive device (2), promote needle (3), the subassembly is exploded to telex (4), false locking device (5) and constitutes its characterized in that: the explosion bolt (1) is connected with the machine body structure and the rear cover of the drag parachute cabin, the false lock device (5) is connected with the machine body support and the drag parachute hanging ring, the push pin end of the push pin device (3) is installed on the false lock device (5) through threads, the output end of the non-electric explosion component (4) is connected with the explosion bolt (1) and the other end of the push pin device (3), and the input end of the non-electric explosion component (4) is connected with the electric detonator (2); the push pin (521) is a piston and rod combined structure, the push pin outer shell (522) is a piston cylinder structure with one end closed and containing gunpowder, and the non-closed end is provided with a hexagon and threads and is assembled with a false lock bolt (501) in a false lock device (5); the false locking device (5) consists of a false locking bolt (501), a self-locking nut (502), a gasket (503), a bushing (504), a clearance adjusting gasket (505), an inner ring (511) and a shaft neck (512); the false lock bolt (501) is a hollow hexagon bolt, the top surface of the hexagon bolt is provided with a blind hole, an internal thread with a certain depth is arranged in the blind hole and used for installing the pin pushing device (3), the polished rod part of the false lock bolt (501) is provided with two shearing damage grooves, and the groove distance is equal to the width of the inner ring (511); the bushing (504) is a flanging bushing and is arranged in the double-lug hole of the machine body support, and the flanging is positioned on the inner side of the double lugs; the thickness of the clearance adjusting gasket (505) is adjusted according to assembly requirements, and the false lock bolt (501), the self-locking nut (502), the gasket (503), the bushing (504) and the clearance adjusting gasket (505) are matched to install the inner ring (511) and the shaft neck (512) on the machine body support.