Radial load bearing decoupling device

Abstract

A radial bearing separation device comprises an igniter, a sealing plug, a cartridge, a piston, a shell, a shear piece and a bolt; the central hole of the shell comprises a sealing plug mounting inner hole, a piston mounting inner hole and a shear piece mounting inner hole, the bottom of the piston mounting inner hole is provided with a straight groove, the shear piece is mounted in the shear piece mounting inner hole and is circumferentially limited by the straight groove at the bottom of the piston mounting inner hole; the piston is mounted in the inner hole of the shell and axially presses the shear piece after being mounted; the cartridge is mounted in the hole of the sealing plug; the sealing plug is mounted at the other end of the inner hole of the shell and axially presses the piston; the end of the bolt can be inserted into the inner hole of the shell and connected with the inner hole of the shear piece; the igniter is radially mounted on the shell, the bottom of the igniter mounting hole is provided with a through hole which is communicated with the cartridge mounting space and is aligned with the outer circle of the cartridge. The present application mainly bears radial load and realizes the separation function.

Description

TECHNICAL FIELD

[0001] The present application relates to a separation device, belonging to the field of initiating explosive. BACKGROUND

[0002] The explosive separation device is widely used in the aerospace industry in China to realize the connection and separation of different structural separation parts. According to different use environments, installation methods and functional requirements, the separation device can not only realize reliable separation function, but also be easy to install and bear certain load; the direction of the load borne is different in different use positions. Generally, the separation device suitable for axial connection of the separation surface mainly bears the load consistent with the axial direction of the separation device, and the separation device itself generally does not bear the radial load.

[0003] Patent "A strong sealing explosive bolt device (CN107191459B) and patent "Explosive bolt connection unlocking device" (CN208530876U) introduce two kinds of explosive bolt devices. Both of them are typical explosive bolt type separation devices, which mainly bear the load in the axial direction when installed and used, realizing the axial connection and separation function; the explosive bolt device of the former patent can only bear the axial load, and bearing the radial load will affect the reliability of its separation; the latter patent is a combination of explosive bolt and bearing structure, which bears the radial load through the bearing structure, and realizes the axial connection and separation through the built-in separate explosive bolt, and the axial and radial bearing capacity of the device is borne by the two parts of the device component respectively, and the appearance and weight of the device are much larger than those of the general explosive bolt separation device.

[0004] With the continuous development of the overall structure technology of the user, there is an increasingly urgent demand for a device that can not only bear the radial load, but also be reliably connected in the axial direction, be easy to install, have a small size, and be reliably separated. SUMMARY

[0005] The technical problem solved by the present application is to overcome the limitation that the existing separation device mainly bears the axial load, and to provide a separation device that mainly bears the radial load and realizes the separation function.

[0006] The technical solution adopted by the present application is: a radial bearing separation device, comprising an igniter, a sealing plug, a cartridge, a piston, a housing, a shear piece and a bolt.

[0007] The center hole of the shell comprises a sealing plug mounting inner hole, a piston mounting inner hole and a shear piece mounting inner hole, a straight groove is arranged at the bottom of the piston mounting inner hole, the shear piece is mounted in the shear piece mounting inner hole, and the circumferential limiting is realized through the symmetrical supporting ears on the shear piece and the straight groove at the bottom of the piston mounting inner hole; the piston is mounted in the inner hole of the shell, and the piston is axially pressed against the shear piece after being mounted; the medicine box is mounted in the hole of the sealing plug; the sealing plug is mounted at the other end of the inner hole of the shell and axially presses the piston; the bolt end can be inserted into the inner hole of the shell and connected with the inner hole of the shear piece; the igniter is radially mounted on the shell, and the through hole at the bottom of the igniter mounting hole is communicated with the medicine box mounting space and is aligned with the outer circle of the medicine box.

[0008] Further, the radial bearing separation device further comprises a flat washer, the flat washer is mounted in the sealing hole on the side of the shell, the igniter is pressed against the flat washer through the connection with the shell, and the sealing is realized between the igniter and the shell through the flat washer.

[0009] Further, the radial bearing separation device further comprises a small O-shaped ring, two annular grooves are arranged on the outer circle of one end of the piston, and the small O-shaped ring is mounted in the annular groove, so that the sealing between the piston and the shell is realized.

[0010] Further, the radial bearing separation device further comprises a large O-shaped ring, the large O-shaped ring is mounted between the shell and the sealing plug, and the sealing is realized.

[0011] Further, the sealing plug is axially pressed against the piston through the two symmetrical protruding structures arranged on the end face.

[0012] Further, the outer circle of the medicine box is made of cellophane, and the medicine box is filled with black powder.

[0013] During installation and use, the shell is mounted on the structure through the flange, the separation piece is connected with the structure, and the bolt is connected with the shear piece through the mounting hole of the separation piece.

[0014] During work, the igniter receives the ignition energy of the previous stage to ignite the internal charge, the output gas is transmitted to the medicine box through the through hole at the bottom of the igniter mounting hole of the shell, the outer layer cellophane material and the internal black powder of the medicine box are ignited, the black powder is burned to generate gas to drive the piston to move axially, the piston drives the shear piece to move axially, the two supporting ears of the shear piece are cut off, and the shear piece and the bolt are further driven to move axially to fly out as a whole, the piston moves axially to the bottom of the piston mounting inner hole of the shell and is pressed by the gas after the shear piece and the bolt fly out, and the inner hole left by the shear piece and the bolt is filled.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] (1) The present application has the advantages of simple structure, easy installation, small size and weight.

[0017] (2) The bolt is separated from the device body, the device body can be pre-installed internally, and when connected, the bolt can be externally installed to realize reliable axial connection, so that the problem that the separated device is difficult to be internally installed and connected due to limited installation space is solved, and the application occasions are wider.

[0018] (3) When the bolt is used, the bolt bears the radial load generated by the split piece in cooperation with the hole shaft of the shell, and is particularly suitable for occasions requiring radial bearing separation; the bolt can be used singly or in groups.

[0019] (4) After the device works, the piston filling bolt separates the cavity, and does not shrink under the action of reverse pressure, so that the overall aerodynamic shape of the separated device after working can be maintained. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the device and an installation and use schematic diagram;

[0021] Figure 2 It is a working state schematic diagram of the device;

[0022] Figure 3 It is a structure schematic diagram of the main part of the shell of the device;

[0023] Figure 4 It is a structure schematic diagram of the sealing plug of the device;

[0024] Figure 5 It is a structure schematic diagram of the shearing piece of the device. DETAILED DESCRIPTION

[0025] The application is described in combination with the drawings.

[0026] As shown in Figure 1 , 2 , the application discloses a radial bearing separation device, which comprises a large O-shaped ring 1, a sealing plug 2, a medicine box 3, a small O-shaped ring 4, a shell 5, a piston 6, a shearing piece 7, a bolt 8, a flat washer 9 and an igniter 10.

[0027] The central hole of the shell 5 along the axial direction is a multi-section inner hole with different diameters, comprising a sealing plug installation inner hole, a piston installation inner hole and a shearing piece installation inner hole, and a straight groove is arranged at the bottom of the piston installation inner hole; two small O-shaped rings 4 are installed in two annular grooves of the piston 6, the large O-shaped ring 1 is installed in an annular groove of the shell 5, the medicine box 3 is fixedly connected by epoxy glue in the sealing plug hole, the two ears of the shearing piece 7 are matched and installed into the straight groove at the bottom of the piston installation inner hole of the shell, the piston 6 is installed into the shell 5 to press the shearing piece 7, the sealing plug 2 with the medicine box 3 is screwed into the shell 5 to press the piston 6, two flat washers 9 are respectively installed into two installation holes of the igniter 10 of the shell 5, two igniters 10 are respectively installed into the installation holes of the shell 5 to press the flat washers 9, and the bolt 8 is a separate part.

[0028] When the radial bearing separation device is installed, the device body (other than the bolt) is pre-installed on the mounting flange of the shell 5 Figure 1 The structure shown inside, generally used in the structure of the circumference of the device body is installed in several places, Figure 1 The separation piece is loaded from the axial direction of the structure Figure 1 (Downward direction), and the axially distributed device body is connected to the structure by the bolt 8.

[0029] In the installed state of the radial bearing separation device, the axial load on the separation piece acts on the outer circle of the bolt 8, which bears the load in its radial direction by cooperating with the hole of the shell 5, and the shell 5 bears the radial load on the bolt 8 by cooperating with the hole of the structure, so that the entire radial bearing separation device remains stable, can bear the radial load on the bolt 8, and can maintain the reliable connection between the structure and the separation piece.

[0030] As Figure 3 shown, the igniter 10 mounting hole of the radial bearing separation device is connected to the two small holes inside the shell 5 to transfer the ignition energy of the igniter 10, and the inner hole of the shell 5 has a straight groove at the bottom of the mounting hole of the piston 6, as Figure 5 shown, the two ears of the shear piece 7 are installed in cooperation with the straight groove to prevent the shear piece 7 from rotating during installation with the bolt 8; during installation between the bolt 8 and the shear piece 7, the shear piece 7 is twisted by the ears of the shear piece 7 and the straight groove of the inner hole of the shell to realize the axial bearing force of the shear piece 7; the axial bearing force of the shear piece 7 is realized by the axial compression of the piston 6 on the bottom of the hole of the shell mounting piston; the hole of the shell 5 is cooperated with the hole of the structure to bear the radial load on the bolt 8 after installation.

[0031] As Figure 4 shown, the inner hole of the sealing plug 2 is used to install the cartridge 3, and two small cylinders are designed on the end face of the sealing plug 2 to press the piston 6 while maintaining the cartridge 3 and the two small holes at the bottom of the igniter 10 mounting hole of the shell 5 unobstructed, ensuring that the ignition energy reaches the cartridge smoothly to achieve reliable ignition.

[0032] When the radial bearing separation device is working, after the igniter 10 receives the ignition signal, the igniter 10 works to produce high-temperature gas, which reaches the surface of the cartridge 3 after passing through the corresponding small hole of the shell 5, igniting the cartridge 3, which works to produce high-pressure gas, pushing the piston 6 to move, cutting the shear piece 7 from the two side ears, and continuing to push the combination of the bolt 8 and the remaining part of the shear piece 7 to fly outwards, realizing the separation function, and the piston moves to the bottom of the hole of the shell 5, filling the inner hole of the bolt 8, maintaining the flatness of the end face after separation under the action of gas pressure, to maintain good aerodynamic shape.

[0033] Portions of the disclosure which are not specifically recited herein are deemed to be known by those skilled in the art.

Claims

1. A radial load-bearing separation device, characterized in that, Includes igniter (10), sealing plug (2), medicine box (3), piston (6), housing (5), shear plate (7), and bolt (8); The central hole of the housing (5) includes a sealing plug mounting inner hole, a piston mounting inner hole, and a shear plate mounting inner hole. A straight groove is provided at the bottom of the piston mounting inner hole. The shear plate (7) is installed in the shear plate mounting inner hole. The circumferential limit is achieved by the symmetrical lugs on the shear plate (7) and the straight groove at the bottom of the piston mounting inner hole. The piston (6) is installed in the inner hole of the housing (5). After the piston (6) is installed, it axially presses the shear plate (7). The medicine box (3) is installed in the hole of the sealing plug (2). The sealing plug (2) is installed at the other end of the inner hole of the housing and axially presses the piston (6). The end of the bolt (8) can be inserted into the inner hole of the housing and connected to the inner hole of the shear plate (7). The igniter (10) is radially installed on the housing (5). The bottom of the igniter mounting hole has a through hole that connects to the installation space of the medicine box (3) and is aligned with the outer circle of the medicine box (3). The sealing plug (2) axially presses the piston (6) through two symmetrical protrusions on its end face. During installation and use, the housing (5) is installed on the structure through the flange. After the separator is connected to the structure, the bolt (8) passes through the mounting hole of the separator and is installed and connected to the shear plate (7). When working, the igniter (10) receives the ignition energy from the previous stage to ignite the internal charge. The output gas is transmitted to the charge box (3) through the through hole at the bottom of the igniter mounting hole on the shell (5), igniting the celluloid material on the outer layer of the charge box and the black powder inside. The combustion of the black powder generates gas that pushes the piston (6) to move axially. The piston (6) pushes the shear plate (7) to move axially, cutting off the two ears of the shear plate (7), and continues to push the connection between the shear plate (7) and the bolt (8) so that the shear plate (7) and the bolt (8) fly out axially as a whole. After the piston (6) moves axially to the bottom of the piston mounting hole in the shell, it is pressed by the gas and fills the inner hole left after the shear plate (7) and the bolt (8) fly out. The radial load separation device further includes a flat washer (9), which is installed in a sealing hole on the side of the housing (5). The igniter (10) is connected to the housing (5) and presses the flat washer (9) together. The igniter (10) and the housing (5) are sealed by the flat washer (9). The outer circumference of the medicine box (3) is made of celluloid material, and the medicine box (3) contains black powder.

2. The radial load-bearing separation device according to claim 1, characterized in that, It also includes small O-rings (4), and two annular grooves are provided on the outer circle of one end of the piston (6), and small O-rings (4) are installed in the annular grooves respectively to achieve the sealing between the piston (6) and the housing (5).

3. The radial load-bearing separation device according to claim 1, characterized in that, It also includes a large O-ring (1), which is installed between the housing (5) and the sealing plug (2) to achieve a seal.

Images