CN107813943B - Three-stage ejection cylinder - Google Patents
Three-stage ejection cylinder Download PDFInfo
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- CN107813943B CN107813943B CN201711199985.5A CN201711199985A CN107813943B CN 107813943 B CN107813943 B CN 107813943B CN 201711199985 A CN201711199985 A CN 201711199985A CN 107813943 B CN107813943 B CN 107813943B
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- cylinder
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- sealing
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- limiting block
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- 238000007789 sealing Methods 0.000 claims abstract description 69
- 239000002737 fuel gas Substances 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 11
- 230000003068 static effect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 description 1
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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
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- 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 the field of design of ejection barrels for rocket ejection seats, and relates to a three-stage ejection barrel. After high-pressure gas enters the inner cylinder, the middle cylinder, the limiting block connected with threads and the sealing plug move together against the outer cylinder with ejection load until the limiting block contacts with the outer step of the inner cylinder, the middle cylinder stops moving, the outer cylinder continues moving under the action of inertia and the sealing plug, after the outer cylinder moves to a certain stroke, the sealing plug is separated from the inner cylinder, and the gas enters a space region between the middle cylinder and the outer cylinder after being throttled by an inner hole of a sealing section, and continues pushing the outer cylinder to move. Because the fuel gas enters the inner cavity of the outer cylinder and is throttled, the pressure is reduced, and the middle cylinder is in a balanced static state under the limitation of the fuel gas pressure and the steps of the inner cylinder. The outer cylinder is used as a framework of the seat, the cylinder is fixedly limited by utilizing the gas pressure difference between the cylinders at all levels, and the seat has the advantages of simple structure, light weight, convenient implementation and reliable functions.
Description
Technical Field
The invention belongs to the field of design of ejection barrels for rocket ejection seats, and relates to a three-stage ejection barrel.
Background
The three-stage ejection cylinder used on the existing rocket ejection seat is in a form that an inner cylinder moves along with ejection load, the ejection cylinder cannot be used as a framework of the seat, and the redundant weight of a seat system is large; the three-stage ejection cylinder adopting the outer cylinder as the seat framework has the problem that the middle one-stage cylinder is difficult to fix and limit.
In the prior art, the middle cylinder is in lap joint movement with the outer cylinder in the working process, the outer cylinder is cut off in a ring shape by means of a cutting rope after the middle cylinder moves to a certain shape, and the constraint is released at the disconnection limiting part.
Disclosure of Invention
The purpose of the invention is that: the three-stage catapulting cylinder solves the problem that the redundant weight of a seat system is achieved due to the fact that an inner cylinder of the three-stage catapulting cylinder used in the existing rocket catapulting seat moves along with catapulting load, and the problem that a middle primary cylinder is difficult to limit and fix.
The technical scheme of the invention is as follows: a three-stage ejection cylinder comprises an outer cylinder 2, a middle cylinder 3 and an inner cylinder 4;
the outer cylinder 2 is a cylinder with an open left end and a cylinder bottom at the right end, and a section of screw thread connected with the seat is arranged in the middle section outside the cylinder;
the middle cylinder 3 is a cylinder with steps inside, is divided into 3 sections from left to right, and is respectively provided with a limiting block connecting section 3a, a cylinder body section 3b and a sealing section 3c, wherein the cylinder body section 3b is a cylinder with annular steps outside, the outer diameter of the annular steps is the same as the inner diameter of the outer cylinder 2 and is uniformly distributed along the cylinder body, the annular steps are further arranged at the left end outside the cylinder body section 3b, the limiting block connecting section 3a is a cylinder with threads inside, the outer diameter of the cylinder of the limiting block connecting section 3a is equal to the outer diameter of the outer cylinder 2, the minor diameter of the threads is larger than the inner diameter of the cylinder body section 3b, the sealing section 3c is of a cylinder structure, the outer side of the cylinder of the sealing section 3c is provided with a sealing ring groove, the outer diameter of the cylinder of the sealing section 3c is equal to the outer diameter of the cylinder body section 3b, one end of the cylinder of the sealing section 3c is provided with a small hole 3d with an annular groove, and the outer end of the sealing section 3c is provided with an annular groove;
the inner cylinder 4 is a cylinder with a step on one end surface, an internal thread on the other end and a full-through inside, a sealing ring groove is arranged on the outer side of the step, the diameter of an inner hole of the inner cylinder 4 is larger than the inner diameter of the small hole 3d, and the internal thread is used for being connected with an ejection bomb for generating fuel gas;
one end of an inner cylinder 4 with a step is sleeved in a middle cylinder 3, a limiting block 1 with threads on the outside and through holes in the inside is connected to a limiting block connecting section 3a on the middle cylinder 3, the diameter of the through hole of the limiting block 1 is equal to the outer diameter of a cylinder section of the inner cylinder 4, one end of the middle cylinder 3 with the step is sleeved in an outer cylinder 2, a sealing plug 5 is arranged at an inner hole of a sealing section 3c, the sealing plug 5 is a rotary cylinder with a T-shaped section, the diameter of the thin end of the rotary cylinder is equal to the diameter of the inner hole of the sealing section 3c, the length of the thin end of the rotary cylinder is equal to the length of the inner hole of the sealing section 3c, a sealing ring groove is formed in the middle of the outer circle surface of the thin end of the rotary cylinder, the thick end of the rotary cylinder is attached to the outer cylinder 2, and rubber sealing rings 6 are arranged at the sealing ring grooves.
After the ejection cylinder enters high-pressure gas in the inner cylinder 4, the middle cylinder 3, the limiting block 1 in threaded connection and the sealing plug 5 move together against the outer cylinder 2 with ejection load until the limiting block 1 and the outer step of the inner cylinder 4 are in contact with each other, the middle cylinder 3 stops moving, the outer cylinder 2 continues moving under the action of inertia and the sealing plug 5, after the ejection cylinder moves to a certain stroke, the sealing plug 5 is separated from the middle cylinder 3, and gas enters a space region between the middle cylinder 3 and the outer cylinder 2 after being throttled by the small hole 3d of the sealing section 3c, and the outer cylinder 2 is continuously pushed to move. Because the fuel gas enters the inner cavity of the outer cylinder 2 and is throttled, the pressure is reduced, and the middle cylinder 3 is in a balanced static state under the limitation of the fuel gas pressure and the inner cylinder steps.
The invention has the advantages that: the three-stage ejection cylinder adopts the outer cylinder as a framework of the seat, and the cylinder is fixedly limited by utilizing the gas pressure difference between the cylinders at all stages, so that the three-stage ejection cylinder has the advantages of simple structure, light weight, convenience in implementation and reliable functions.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the middle barrel 3 in the present invention.
Detailed Description
The present invention will be described in further detail below. Referring to fig. 1 and 2, a three-stage ejection cartridge includes an outer cartridge 2, a middle cartridge 3, and an inner cartridge 4;
the outer cylinder 2 is a cylinder with an open left end and a cylinder bottom at the right end;
the middle cylinder 3 is a cylinder with steps inside, is divided into 3 sections from left to right, and is respectively provided with a limiting block connecting section 3a, a cylinder body section 3b and a sealing section 3c, wherein the cylinder body section 3b is a cylinder with circular steps outside, the outer diameter of the circular steps is the same as the inner diameter of the outer cylinder 2 and is uniformly distributed along the cylinder body, the circular steps are further arranged at the left end outside the cylinder body section 3b, the limiting block connecting section 3a is a cylinder with threads inside, the outer diameter of the cylinder of the limiting block connecting section 3a is equal to the outer diameter of the outer cylinder 2, the minor diameter of the threads is larger than the inner diameter of the cylinder body section 3b, the sealing section 3c is of a cylinder structure, the outer side of the cylinder of the sealing section 3c is provided with a sealing ring groove, the outer diameter of the cylinder of the sealing section 3c is equal to the outer diameter of the cylinder body section 3b, the inner diameter of the cylinder of the sealing section 3c is smaller than the inner diameter of the cylinder body section 3b, one end of the cylinder of the sealing section 3c is provided with a small hole 3d with a circular groove;
the inner cylinder 4 is a cylinder with a step on one end face, an internal thread on the other end and a full-through inside, a sealing ring groove is arranged on the outer side of the step, the diameter of an inner hole of the inner cylinder 4 is larger than the inner diameter of a small hole 3d of the sealing section 3c, and the internal thread is used for being connected with an ejection bomb for generating fuel gas;
one end of an inner cylinder 4 with a step is sleeved in a middle cylinder 3, a limiting block 1 with threads on the outside and through holes in the inside is connected to a limiting block connecting section 3a on the middle cylinder 3, the diameter of the through hole of the limiting block 1 is equal to the outer diameter of a cylinder section of the inner cylinder 4, one end of the middle cylinder 3 with the step is sleeved in an outer cylinder 2, a sealing plug 5 is arranged at an inner hole of a sealing section 3c, the sealing plug 5 is a rotary cylinder with a T-shaped section, the diameter of the thin end of the rotary cylinder is equal to the diameter of the inner hole of the sealing section 3c, the length of the thin end of the rotary cylinder is equal to the length of the inner hole of the sealing section 3c, a sealing ring groove is formed in the middle of the outer circle surface of the thin end of the rotary cylinder, the thick end of the rotary cylinder is attached to the outer cylinder 2, and rubber sealing rings 6 are arranged at the sealing ring grooves.
After the ejection cylinder enters high-pressure gas in the inner cylinder 4, the middle cylinder 3, the limiting block 1 in threaded connection and the sealing plug 5 move together against the outer cylinder 2 with ejection load until the limiting block 1 and the outer step of the inner cylinder 4 are in contact with each other, the middle cylinder 3 stops moving, the outer cylinder 2 continues moving under the action of inertia and the sealing plug 5, after the ejection cylinder moves to a certain stroke, the sealing plug 5 is separated from the middle cylinder 3, and gas enters a space region between the middle cylinder 3 and the outer cylinder 2 after being throttled by the small hole 3d of the sealing section 3c, and the outer cylinder 2 is continuously pushed to move. Because the fuel gas enters the inner cavity of the outer cylinder 2 and is throttled, the pressure is reduced, and the middle cylinder 3 is in a balanced static state under the limitation of the fuel gas pressure and the inner cylinder steps.
The working principle of the invention is as follows: after the ejection cylinder enters high-pressure gas in the inner cylinder 4, the middle cylinder 3, the limiting block 1 in threaded connection and the sealing plug 5 move together against the outer cylinder 2 with ejection load until the limiting block 1 and the outer step of the inner cylinder 4 are in contact with each other, the middle cylinder 3 stops moving, the outer cylinder 2 continues moving under the action of inertia and the sealing plug 5, after the ejection cylinder moves to a certain stroke, the sealing plug 5 is separated from the middle cylinder 3, and gas enters a space region between the middle cylinder 3 and the outer cylinder 2 after being throttled by the small hole 3d of the sealing section 3c, and the outer cylinder 2 is continuously pushed to move. Because the fuel gas enters the inner cavity of the outer cylinder 2 and is throttled, the pressure is reduced, and the middle cylinder 3 is in a balanced static state under the limitation of the fuel gas pressure and the inner cylinder steps.
Claims (1)
1. A three-level ejection cylinder, which comprises an outer cylinder (2), a middle cylinder (3) and an inner cylinder (4);
the outer cylinder (2) is a cylinder with an open left end and a cylinder bottom at the right end, and a section of screw thread connected with the seat is arranged in the middle section outside the cylinder;
the middle cylinder (3) is a cylinder with steps inside, is divided into 3 sections from left to right, and is respectively a limiting block connecting section (3 a), a cylinder body section (3 b) and a sealing section (3 c), the cylinder body section (3 b) is a cylinder with annular steps outside, the outer diameter of the annular steps is the same as the inner diameter of the outer cylinder (2) and is uniformly distributed along the cylinder body, the annular steps are further arranged at the left end outside the cylinder body section (3 b), the limiting block connecting section (3 a) is a cylinder with threads inside, the outer diameter of the cylinder of the limiting block connecting section (3 a) is equal to the outer diameter of the outer cylinder (2), the small diameter of the threads is larger than the inner diameter of the cylinder body section (3 b), the sealing section (3 c) is of a cylinder structure, the outer side of the cylinder of the sealing section (3 c) is provided with a sealing ring groove, the outer diameter of the cylinder of the sealing section (3 c) is equal to the outer diameter of the cylinder body section (3 b), one end of the cylinder of the sealing section (3 c) is provided with a small hole (3 d) with a smaller diameter than the inner diameter of the cylinder section (3 b), and the outer end of the sealing section (3 c) is provided with a ring groove;
the inner cylinder (4) is a cylinder with a step on one end face, an internal thread on the other end and a full-through inside, a sealing ring groove is arranged on the outer side of the step, the inner hole diameter of the inner cylinder (4) is larger than the inner diameter of the small hole (3 d), and the internal thread is used for being connected with an ejection bomb for generating fuel gas, and the inner cylinder is characterized in that: one end of the inner cylinder (4) with a step is sleeved inside the middle cylinder (3), a limiting block (1) with threads on the outside and through holes in the inside is connected to a limiting block connecting section (3 a) on the middle cylinder (3), the diameter of the through hole of the limiting block (1) is equal to the outer diameter of the cylinder section of the inner cylinder (4), one end of the middle cylinder (3) with the step is sleeved inside the outer cylinder (2), a sealing plug (5) is arranged at the inner hole of the sealing section (3 c), the sealing plug (5) is a rotary cylinder with a T-shaped section, the diameter of the thin end of the rotary cylinder is equal to the diameter of the inner hole of the sealing section (3 c), the length of the thin end of the rotary cylinder is equal to the length of the inner hole of the sealing section (3 c), a sealing ring groove is arranged in the middle of the outer circle surface of the thin end of the rotary cylinder, the thick end of the rotary cylinder is attached to the outer cylinder (2), and rubber sealing rings (6) are arranged at the sealing ring grooves; after the ejection cylinder enters high-pressure gas in the inner cylinder (4), the middle cylinder (3) and the limiting block (1) and the sealing plug (5) which are in threaded connection move together against the outer cylinder (2) with ejection load until the limiting block (1) and the outer step of the inner cylinder (4) are in contact with each other, the middle cylinder (3) stops moving, the outer cylinder (2) continues moving under the actions of inertia and the sealing plug (5), after the ejection cylinder moves to a certain stroke, the sealing plug (5) is separated from the middle cylinder (3), fuel gas enters a space area between the middle cylinder (3) and the outer cylinder (2) after being throttled by a small hole (3 d) of the sealing section (3 c), and the outer cylinder (2) is continuously pushed to move, and because the fuel gas enters an inner cavity of the outer cylinder (2) to be throttled, the pressure is reduced, and the middle cylinder (3) is in a balanced static state under the limitation of the fuel gas pressure and the inner cylinder step.
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 |
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| Publication Number | Publication Date |
|---|---|
| CN107813943A CN107813943A (en) | 2018-03-20 |
| CN107813943B true CN107813943B (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711199985.5A Active CN107813943B (en) | 2017-11-23 | 2017-11-23 | Three-stage ejection cylinder |
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| Country | Link |
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| CN (1) | CN107813943B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113587724A (en) * | 2021-06-16 | 2021-11-02 | 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 |
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| Publication number | Publication date |
|---|---|
| CN107813943A (en) | 2018-03-20 |
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