CN107813943A - A kind of three-stage catapult cylinder - Google Patents
A kind of three-stage catapult cylinder Download PDFInfo
- Publication number
- CN107813943A CN107813943A CN201711199985.5A CN201711199985A CN107813943A CN 107813943 A CN107813943 A CN 107813943A CN 201711199985 A CN201711199985 A CN 201711199985A CN 107813943 A CN107813943 A CN 107813943A
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- Prior art keywords
- cylinder
- outer barrel
- section
- diameter
- plug
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- 239000000567 combustion gas Substances 0.000 claims abstract description 12
- 230000033001 locomotion Effects 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 7
- 230000007423 decrease Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D25/00—Emergency apparatus or devices, not otherwise provided for
- B64D25/08—Ejecting or escaping means
- B64D25/10—Ejector seats
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention belongs to ejector seat ejection guns design field, is related to a kind of three-stage catapult cylinder.After ejection guns of the present invention enters high-pressure gas inside inner cylinder, the confinement block and sealing-plug of middle cylinder and threaded connection head on the outer barrel with ejection load and moved together together, until the outer steps of confinement block and inner cylinder contact with each other, middle cylinder stop motion, outer barrel continues to move in the presence of inertia and sealing-plug, and after moving to certain stroke, sealing-plug departs from inner cylinder, area of space in entering after the endoporus throttling that sealed section of combustion gas between cylinder and outer barrel, continues to press on outer barrel motion.Because combustion gas is entering outer tube inner chamber by throttling, pressure decline, middle cylinder is under the limitation of gaseous-pressure and inner cylinder step in balance inactive state.Using skeleton of the outer barrel as seat, limitation cylinder is fixed using the gas pressure difference between cylinders at different levels, simple in construction, in light weight, easy to implement, function is reliable.
Description
Technical field
The invention belongs to ejector seat ejection guns design field, is related to a kind of three-stage catapult cylinder.
Background technology
The three-stage catapult cylinder used at present on ejector seat is form of the inner cylinder with ejection loading movement, and ejection guns is not
Skeleton of the energy as seat, the redundancy weight of seat system are larger；Outer barrel is used as in the three-stage catapult cylinder presence of chair framework
Between one-level cylinder be difficult to fix the problem of spacing.
Have in the prior art one kind take middle cylinder in the course of the work with outer barrel overlap move, move to one be shaped as after
By flexible linear shaped charge annular cut-out outer barrel, disconnect the outstanding constraint of restriction site technical scheme, the program add seat system with
The connecting interface of aircraft, the action of flexible linear shaped charge cutting metal outer cylinder being added, the reliability requirement of cutting is higher, once cutting is lost
Effect, seat will be directly influenced and depart from aircraft, influence lifesaving safety, reliability is relatively low.
The content of the invention
The purpose of the present invention is：A kind of three-stage catapult cylinder is provided, solves the three-stage catapult that current ejector seat uses
The problem of cylinder inner cylinder brings seat system redundancy weight to reach with ejection loading movement and middle one-level cylinder are difficult to spacing fixation
The problem of.
The present invention technical solution be：A kind of three-stage catapult cylinder, including outer barrel 2, middle cylinder 3 and inner cylinder 4；
The outer barrel 2 is the cylinder that a left end is unlimited, right-hand member carries cylinder bottom, and cylindrical outer stage casing carries one section and seat
The screw thread of connection；
The middle cylinder 3 is the cylinder that an inside carries step, is from left to right divided into 3 sections, is confinement block linkage section respectively
3a, shell portion 3b and seal section 3c, shell portion 3b are the cylinders that an outside carries annular steps, and the external diameter of annular steps is identical
And be uniformly distributed along stack shell, shell portion 3b external left sections are disposed with an annular steps, and confinement block linkage section 3a is an inside
Screwed cylinder, outside diameter of cylinder is equal with outer barrel 2, and diameter of thread is more than shell portion 3b internal diameter, and seal section 3c is one
Cylindrical structure, cylinder outside carry seal groove, and outside diameter of cylinder is equal with shell portion 3b, and one section of cylinder is provided with diameter and is less than stack shell
Section 3b aperture 3d, seal section 3c outer face carries annular groove；
The inner cylinder 4 is that an end face carries internal thread, the cylinder of internal all-pass, step outside with step, the other end
With seal groove, diameter of bore is more than aperture 3d internal diameter, and internal thread is used to be connected with producing the ejection bullet of combustion gas；
A kind of three-stage catapult cylinder, the one end of inner cylinder 4 with step are placed on inside middle cylinder, confinement block linkage section 3a on middle cylinder 3
On be connected with an outside be threaded, inside be through hole confinement block 1, the through-hole diameter of confinement block 1 and the cylindrical section of inner cylinder 4
External diameter is equal, and the one end of middle cylinder 3 with step is placed on inside outer barrel 2, and a sealing-plug 5 is housed at seal section 3c endoporus, close
Blocking 5 is the revolution cylinder that a section is T-shaped, and it is equal with seal section 3c diameter of bore to turn round the taper end diameter of cylinder, time
Turn the taper end length of cylinder and seal section 3c endoporus equal length, turn round in the middle part of the taper end periphery of cylinder with a sealing
Ring recess, the butt end for turning round cylinder are bonded with outer barrel 2, and rubber seal is housed at each seal groove.
After ejection guns enters high-pressure gas inside inner cylinder 4, the confinement block 1 and sealing-plug 5 one of middle cylinder 4 and threaded connection
Rise to head on and moved together with the outer barrel 2 for launching load, until the outer steps of confinement block 1 and inner cylinder 2 contact with each other, middle cylinder 4
Stop motion, outer barrel 2 continues to move in the presence of inertia and sealing-plug 5, and after moving to certain stroke, sealing-plug 5 is de-
From inner cylinder 3, the area of space in entering after sealed section of 3c of combustion gas endoporus throttling between cylinder 3 and outer barrel 2, outer barrel is continued to press on
2 motions.Because combustion gas is entering outer tube inner chamber by throttling, pressure decline, limit of the middle cylinder 3 in gaseous-pressure and inner cylinder step
System is lower in balance inactive state.
It is an advantage of the invention that：A kind of three-stage catapult cylinder is proposed, using skeleton of the outer barrel as seat, utilizes cylinders at different levels
Between gas pressure difference fix limitation cylinder, simple in construction, in light weight, easy to implement, function is reliable.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of middle cylinder 3 in the present invention.
Embodiment
The present invention is described in further details below.Referring to Fig. 1 and Fig. 2, a kind of three-stage catapult cylinder, including outer barrel 2, in
Cylinder 3 and inner cylinder 4；
The outer barrel 2 is the cylinder that a left end is unlimited, right-hand member carries cylinder bottom；
The middle cylinder 3 is the cylinder that an inside carries step, is from left to right divided into 3 sections, is confinement block linkage section respectively
3a, shell portion 3b and seal section 3c, shell portion 3b are the cylinders that an outside carries annular steps, and the external diameter of annular steps is identical
And be uniformly distributed along stack shell, shell portion 3b external left sections are disposed with an annular steps, and confinement block linkage section 3a is an inside
Screwed cylinder, outside diameter of cylinder is equal with outer barrel 2, and diameter of thread is more than shell portion 3b internal diameter, and seal section 3c is one
Cylindrical structure, cylinder outside carry seal groove, and outside diameter of cylinder is equal with shell portion 3b, and barrel bore is interior less than shell portion 3b's
Footpath, seal section 3c outer face carry annular groove；
The inner cylinder 4 is that an end face carries seal groove, endoporus with step, the cylinder of internal all-pass, step outside
Diameter is more than seal section 3c internal diameter；
A kind of one end of three-stage catapult cylinder inner cylinder 4 with step is placed on inside middle cylinder, on middle cylinder 3 on confinement block linkage section 3a
Be connected with an outside be threaded, inside be through hole confinement block 1, the through-hole diameter of confinement block 1 is outer with the cylindrical section of inner cylinder 4
Footpath is equal, and the one end of middle cylinder 3 with step is placed on inside outer barrel 2, and a sealing-plug 5 is housed at seal section 3c endoporus, is sealed
Plug 5 is the revolution cylinder that a section is T-shaped, and it is equal with seal section 3c diameter of bore to turn round the taper end diameter of cylinder, is turned round
The taper end length of cylinder and seal section 3c endoporus equal length, turn round in the middle part of the taper end periphery of cylinder and carry a sealing ring
Groove, the butt end for turning round cylinder are bonded with outer barrel 2, and rubber seal is housed at each seal groove.
After ejection guns enters high-pressure gas inside inner cylinder 4, the confinement block 1 and sealing-plug 5 one of middle cylinder 4 and threaded connection
Rise to head on and moved together with the outer barrel 2 for launching load, until the outer steps of confinement block 1 and inner cylinder 2 contact with each other, middle cylinder 4
Stop motion, outer barrel 2 continues to move in the presence of inertia and sealing-plug 5, and after moving to certain stroke, sealing-plug 5 is de-
From inner cylinder 3, the area of space in entering after sealed section of 3c of combustion gas endoporus throttling between cylinder 3 and outer barrel 2, outer barrel is continued to press on
2 motions.Because combustion gas is entering outer tube inner chamber by throttling, pressure decline, limit of the middle cylinder 3 in gaseous-pressure and inner cylinder step
System is lower in balance inactive state.
The present invention operation principle be：After ejection guns enters high-pressure gas inside inner cylinder 4, middle cylinder 4 and threaded connection
Confinement block 1 and sealing-plug 5 head on the outer barrel 2 with ejection load together and move together, until confinement block 1 and inner cylinder 2 is outer
Portion's step contacts with each other, and the middle stop motion of cylinder 4, outer barrel 2 continues to move in the presence of inertia and sealing-plug 5, moves to one
After fixed stroke, sealing-plug 5 departs from inner cylinder 3, in entering after sealed section of 3c of combustion gas endoporus throttling between cylinder 3 and outer barrel 2
Area of space, continue to press on outer barrel 2 and move.Because combustion gas is entering outer tube inner chamber by throttling, pressure declines, and middle cylinder 3 is firing
In balance inactive state under the limitation of atmospheric pressure and inner cylinder step.
Claims (1)
1. a kind of three-stage catapult cylinder, including outer barrel (2), middle cylinder (3) and inner cylinder (4)；The outer barrel (2) be a left end open wide,
Right-hand member carries the cylinder at cylinder bottom, and cylindrical outer stage casing carries one section of screw thread being connected with seat；The middle cylinder (3) is an inside
Cylinder with step, is from left to right divided into 3 sections, is confinement block linkage section (3a), shell portion (3b) and seal section (3c) respectively,
Shell portion (3b) is the cylinder that an outside carries annular steps, and the external diameter of annular steps is identical and is uniformly distributed along stack shell, cylinder
Figure (3b) external left section is disposed with an annular steps, and confinement block linkage section (3a) is a screwed cylinder in inside,
Outside diameter of cylinder is equal with outer barrel (2), and diameter of thread is more than the internal diameter of shell portion (3b), and seal section (3c) is a cylindrical structure,
Seal groove is carried on the outside of cylinder, outside diameter of cylinder is equal with shell portion (3b), and one section of cylinder is provided with diameter and is less than shell portion (3b)
Aperture (3d), the outer face of seal section (3c) carries annular groove；The inner cylinder (4) is an end face with step, another
End carries seal groove with internal thread, the cylinder of internal all-pass, step outside, and diameter of bore is more than the internal diameter of aperture (3d),
Internal thread is used to be connected with producing the ejection bullet of combustion gas, it is characterised in that:The one end of inner cylinder (4) with step is placed in middle cylinder
Portion, be connected with confinement block linkage section (3a) on middle cylinder (3) outside be threaded, inside be through hole confinement block (1), limit
The through-hole diameter of clamp dog (1) is equal with the external diameter of inner cylinder (4) cylindrical section, and the one end of middle cylinder (3) with step is placed in outer barrel (2)
Portion, a sealing-plug (5) is housed at the endoporus of seal section (3c), sealing-plug (5) is the revolution cylinder that a section is T-shaped, is returned
Turn that the taper end diameter of cylinder is equal with the diameter of bore of seal section (3c), turn round the interior of the taper end length of cylinder and seal section (3c)
Hole length is equal, turns round in the middle part of the taper end periphery of cylinder and carries a seal groove, and the butt end and outer barrel (2) for turning round cylinder paste
Close, rubber seal is housed at each seal groove；After ejection guns enters high-pressure gas inside inner cylinder (4), middle cylinder (4) and spiral shell
The confinement block (1) and sealing-plug (5) of line connection head on the outer barrel (2) with ejection load and moved together together, until confinement block
(1) outer steps with inner cylinder (2) contact with each other, and middle cylinder (4) stop motion, outer barrel (2) is in inertia and the work of sealing-plug (5)
Continue to move under, after moving to certain stroke, sealing-plug (5) departs from inner cylinder (3), the endoporus section of sealed section of combustion gas (3c)
Area of space in entering after stream between cylinder (3) and outer barrel (2), outer barrel (2) motion is continued to press on, because combustion gas is into outer barrel
Inner chamber declines by throttling, pressure, and middle cylinder (3) is under the limitation of gaseous-pressure and inner cylinder step in balance inactive state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711199985.5A CN107813943B (en) | 2017-11-23 | 2017-11-23 | Three-stage ejection cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711199985.5A CN107813943B (en) | 2017-11-23 | 2017-11-23 | Three-stage ejection cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107813943A true CN107813943A (en) | 2018-03-20 |
| CN107813943B CN107813943B (en) | 2023-05-23 |
Family
ID=61610145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711199985.5A Active CN107813943B (en) | 2017-11-23 | 2017-11-23 | Three-stage ejection cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107813943B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834381A (en) * | 2021-06-16 | 2021-12-24 | 北京机械设备研究所 | Underwater balance launching device and launching method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1323073A (en) * | 1969-08-06 | 1973-07-11 | Ml Aviation Co Ltd | Ejection guns and ejection devices incorporating such guns for use in aircraft |
| US4088287A (en) * | 1976-03-09 | 1978-05-09 | R. Alkan & Cie. | Dual-purpose ejector for aircraft load jettisoning mechanism |
| FR2408520A1 (en) * | 1977-11-10 | 1979-06-08 | Dassault Avions | Ejection device for pod-mounted missiles - has telescopic multiple pistons extended by explosive charge and retracted by cable system |
| GB2078912A (en) * | 1979-06-04 | 1982-01-13 | Nash Frazer Ltd | Missile launcher |
| US4399968A (en) * | 1980-05-16 | 1983-08-23 | Rockwell International Corporation | Controlled output force actuator |
| US4466334A (en) * | 1982-03-09 | 1984-08-21 | The United States Of America As Represented By The Secretary Of The Navy | Hydraulic aircraft/stores cartridge |
| US4850553A (en) * | 1986-09-12 | 1989-07-25 | Scot, Incorporated | Ejector arrangement for aircraft store racks |
| US6073886A (en) * | 1998-08-20 | 2000-06-13 | Mcdonnell Douglas Corporation | Constant pressure area telescoping piston and method of using same |
| CN202807102U (en) * | 2012-09-21 | 2013-03-20 | 航宇救生装备有限公司 | Initiation mechanism of stabilization system for discharging seat from cabin |
| CN203146733U (en) * | 2013-02-04 | 2013-08-21 | 哈尔滨东安发动机（集团）有限公司 | Transmission structure of motor-driving mechanism of rocket ejector seat |
-
2017
- 2017-11-23 CN CN201711199985.5A patent/CN107813943B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1323073A (en) * | 1969-08-06 | 1973-07-11 | Ml Aviation Co Ltd | Ejection guns and ejection devices incorporating such guns for use in aircraft |
| US4088287A (en) * | 1976-03-09 | 1978-05-09 | R. Alkan & Cie. | Dual-purpose ejector for aircraft load jettisoning mechanism |
| FR2408520A1 (en) * | 1977-11-10 | 1979-06-08 | Dassault Avions | Ejection device for pod-mounted missiles - has telescopic multiple pistons extended by explosive charge and retracted by cable system |
| GB2078912A (en) * | 1979-06-04 | 1982-01-13 | Nash Frazer Ltd | Missile launcher |
| US4399968A (en) * | 1980-05-16 | 1983-08-23 | Rockwell International Corporation | Controlled output force actuator |
| US4466334A (en) * | 1982-03-09 | 1984-08-21 | The United States Of America As Represented By The Secretary Of The Navy | Hydraulic aircraft/stores cartridge |
| US4850553A (en) * | 1986-09-12 | 1989-07-25 | Scot, Incorporated | Ejector arrangement for aircraft store racks |
| US6073886A (en) * | 1998-08-20 | 2000-06-13 | Mcdonnell Douglas Corporation | Constant pressure area telescoping piston and method of using same |
| CN202807102U (en) * | 2012-09-21 | 2013-03-20 | 航宇救生装备有限公司 | Initiation mechanism of stabilization system for discharging seat from cabin |
| CN203146733U (en) * | 2013-02-04 | 2013-08-21 | 哈尔滨东安发动机（集团）有限公司 | Transmission structure of motor-driving mechanism of rocket ejector seat |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834381A (en) * | 2021-06-16 | 2021-12-24 | 北京机械设备研究所 | Underwater balance launching device and launching method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107813943B (en) | 2023-05-23 |
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