CN113173269A - Low-resilience combined buffering device - Google Patents
Low-resilience combined buffering device Download PDFInfo
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- CN113173269A CN113173269A CN202110423596.6A CN202110423596A CN113173269A CN 113173269 A CN113173269 A CN 113173269A CN 202110423596 A CN202110423596 A CN 202110423596A CN 113173269 A CN113173269 A CN 113173269A
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- piston rod
- honeycomb
- plunger
- buffer
- cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/62—Systems for re-entry into the earth's atmosphere; Retarding or landing devices
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- Fluid-Damping Devices (AREA)
Abstract
The invention belongs to the field of rocket launching, and particularly relates to a low-resilience combined buffering device. The plunger piston comprises a plunger cylinder, a piston rod, a buffer honeycomb, a bottom baffle and a bottom baffle locking mechanism during reverse stroke movement of the piston rod; the buffer honeycombs comprise a forward stroke buffer honeycomb and a reverse stroke buffer honeycomb, and the piston rod comprises two cylinders separated by a middle part of partition plate; a positive stroke buffer honeycomb which plays a role in positive stroke buffering is arranged between the plunger cylinder and the partition plate of the piston rod; and a reverse stroke buffer honeycomb which plays a role in reverse stroke buffering is arranged between the partition plate and the bottom end baffle of the piston rod. The invention solves the problem that the prior common oil gas buffer device can generate springback after finishing the task of buffering and energy absorption; the carrier can be more stable in the recovery landing process, and the carrier is prevented from unstably overturning.
Description
Technical Field
The invention belongs to the field of rocket launching, and particularly relates to a low-resilience combined buffering device.
Background
Since most of the conventional launch vehicles are discarded and cannot be recovered after being launched, which results in a significant increase in launch cost, the retractable vehicles are in the direction of development in various countries, and the retractable vehicles are subjected to a large impact force when landing, and therefore, the landing buffering devices are required to absorb the energy of the vehicles during landing and reduce the impact load.
The landing buffer device used at present adopts an oil-gas structure, and can absorb impact energy when a carrier lands, but for the oil-gas buffer device, because high-pressure gas in an air cavity is compressed when the oil-gas buffer device moves in a positive stroke, the pressure of the air cavity is greatly increased, a piston rod can receive resilience force, so that the buffer device inevitably rebounds after the buffer task is finished, unstable factors are increased when the carrier lands, and the low-resilience landing buffer device is urgently needed to eliminate the unstable factors.
Disclosure of Invention
The invention aims to provide a low-resilience combined buffering device, which solves the problem that the conventional oil-gas buffering device can generate resilience after finishing a buffering and energy-absorbing task; the carrier can be more stable in the recovery landing process, and the carrier is prevented from unstably overturning.
The technical solution for realizing the purpose of the invention is as follows: a low-resilience combined buffering device comprises a plunger cylinder, a piston rod, a buffering honeycomb, a bottom baffle and a bottom baffle locking mechanism during reverse stroke movement of the piston rod;
the buffer honeycomb comprises a forward stroke buffer honeycomb and a reverse stroke buffer honeycomb, and the piston rod) comprises two cylinders separated by a middle partition plate;
a positive stroke buffer honeycomb which plays a role in positive stroke buffering is arranged between the plunger cylinder and the partition plate of the piston rod;
and a reverse stroke buffer honeycomb which plays a role in reverse stroke buffering is arranged between the partition plate and the bottom end baffle of the piston rod.
Further, the plunger cylinder comprises an outer cylinder, an inner cylinder and a plunger which are integrally arranged; an annular bulge towards the circle center of the inner cylinder is arranged at the bottom end of the inner cylinder, and a sealing ring is arranged between the side surface of the annular bulge and the cylinder of the piston rod; the positive stroke buffer honeycomb is arranged between the annular bulge and the partition plate of the piston rod.
Furthermore, the piston rod limiting device further comprises a connecting screw, wherein the connecting screw is a socket head cap shaft shoulder screw, one end of the connecting screw penetrates through a through hole in the partition plate and the reverse stroke buffering honeycomb to be in threaded connection with the bottom end baffle, and the shaft shoulder at the other end is used for limiting the partition plate of the piston rod.
Furthermore, locking mechanical system is including setting up the ratch strip at plunger section of thick bamboo urceolus inner wall and setting up at bottom baffle bottom and the rotatable pawl of ratch strip complex, when the piston rod produced the resilience force and leads to producing the reverse stroke motion, the pawl card is on the ratch strip, and the motion of bottom baffle is blocked.
Furthermore, the bottom of bottom baffle is equipped with square groove, is equipped with the locating hole in the square groove, is equipped with the through-hole on the pawl, and spring plunger passes the through-hole on the pawl and sets up the pawl in the locating hole of square groove to make the pawl wind spring plunger free rotation.
Furthermore, the ratchet bar fixing device further comprises a spring piece, wherein the spring piece is installed in the slot at the bottom of the bottom baffle and tightly attached to the pawl and compresses the pawl, so that the pawl can only rotate along a preset direction, the pawl is prevented from rotating in the opposite direction, and the pawl is guaranteed to clamp the ratchet bar.
Furthermore, the ratchet strip is an arc long plate provided with ratchets, countersunk holes for mounting fixing screws are formed in two sides of the middle of the ratchet strip, and the ratchet strip is fixed on the inner wall of the outer barrel of the plunger barrel through the fixing screws.
Furthermore, four ratchet bars are circumferentially arranged along the inner wall of the outer barrel of the plunger barrel, and four groups of pawls and spring pieces are arranged and matched with the ratchet bars; the bottom baffle is discoid structure, and bottom baffle top circumference equipartition has four to be used for with connecting screw complex thread groove, and connecting screw is four.
Furthermore, strong honeycombs are adopted for the forward stroke buffer honeycombs, weak honeycombs are adopted for the reverse stroke buffer honeycombs, the static crushing force difference of the strong and weak honeycombs is 2500-3000N, and internal structural units of the buffer honeycombs are hexagons.
Furthermore, sealing ring grooves are formed in the inner cylinder and the plunger to mount sealing rings, two rows of plunger holes are formed in the side wall of the plunger to facilitate oil-gas exchange between the interior of the plunger and the interior of the inner cylinder, and an edge oil hole and a main oil hole are formed in the bottom end of the plunger to facilitate pressing oil in the oil cavity into the air cavity;
the variable cross-section oil needle is arranged in the cylinder at the front part of the piston rod, the front end of the cylinder is provided with a groove and a backflow hole for placing a sealing ring, oil in the air cavity can flow back into the backflow cavity through the backflow hole when the piston rod moves in a reverse stroke mode, the tail end of the tail cylinder is provided with a thread groove for installing a load element, and four counter bores are arranged at the joint of the two cylinders in the circumferential direction.
Compared with the prior art, the invention has the remarkable advantages that:
(1) the utility model provides a low combination buffer that kick-backs adopts the ratchet structure, can let the piston rod receive external load power and can normally move when producing the forward stroke motion, but the high-pressure gas in the air cavity is compressed and produces the resilience force to the piston rod and make the motion of bottom end baffle be retarded because ratchet's existence when leading to the piston to produce the reverse stroke motion to play the effect of anti-kick-back, stability when increasing the lander and landing.
(2) The mode that adopts strong and weak honeycomb to combine together, the load that receives when the piston rod takes place positive stroke motion is great under the effect of external impact load, and strong honeycomb plays the effect this moment, absorbs impact load together with fluid damping force and air resistance, plays the effect of positive stroke buffering. When the piston rod moves in a reverse stroke mode under the action of the resilience force of the high-pressure gas, the displacement of the bottom end baffle is limited under the action of the ratchet mechanism, so that the weak honeycomb between the piston rod and the bottom end baffle plays a role, and the resilience force of the high-pressure gas is relieved together with the oil damping force.
Drawings
FIG. 1 is a cross-sectional view of a low rebound combination bumper of the present invention.
Fig. 2 is a cross-sectional view of the low rebound combination damper of the present invention during forward stroke movement.
Fig. 3 is a cross-sectional view of the low rebound combination damper of the present invention during reverse stroke movement.
Fig. 4 is a view of the basic components of the plunger rod and the piston rod of the low rebound combined damping device of the present invention.
Fig. 5 is a top view of the low rebound combination damper of the present invention.
Description of reference numerals:
1-plunger cylinder, 2-buffer honeycomb, 3-connecting screw, 4-fixing screw, 5-spring plunger, 6-pawl, 7-sealing ring, 8-ratchet bar, 9-piston rod, 10-bottom baffle, 11-spring leaf, 12-load element, 13-oil return cavity, 14-air cavity, 15-oil liquid cavity, 101-outer cylinder, 102-inner cylinder, 103-plunger, 104-plunger hole, 105-side oil hole, 106-main oil hole, 201-forward stroke buffer honeycomb, 202-reverse stroke buffer honeycomb, 901-return hole and 902-variable cross-section oil needle.
Detailed Description
The invention is further explained by combining the attached drawings, and the low-resilience combined buffer device disclosed by the invention comprises a plunger cylinder 1, a piston rod 9, a sealing ring 7, a buffer honeycomb 2, a connecting screw 3, a bottom end baffle 10, a ratchet 8, a fixing screw 4, a spring plunger 5, a pawl 6, a spring leaf 11 and a load element 12.
The plunger barrel 1 is of an inner barrel 101 structure and an outer barrel 101 structure, and is composed of an outer barrel 101, an inner barrel 102 and a plunger 103, wherein the outer barrel 101 is responsible for connecting and fixing the ratchet bars 8 and protecting components such as internal honeycomb modules and the like from being interfered by external loads. The inner cylinder 102 and the plunger 103 form an air chamber 14 with the piston rod 9, and two rows of plunger holes 104 are formed on the wall of the plunger cylinder 1 so as to facilitate oil-gas exchange between the inside of the plunger 103 and the inside of the inner cylinder 102. The piston rod 9 is formed by a two-part hollow cylinder structure, the variable cross-section oil needle 902 is arranged in the front cylinder, and the variable cross-section design can enable the carrier to be smoother in the whole landing process by adjusting the thickness of the variable cross-section oil needle 902 at each landing stage. Meanwhile, the tail part of the piston rod 9 adopts a hollow cylinder design to reduce the weight of the piston rod 9. In addition, the oil cavity 15 is used for storing oil before the mechanism works, the air cavity 14 is filled with high-pressure gas to maintain the balance of the mechanism before the mechanism works, and the oil return cavity 13 is used for storing oil which flows back from the air cavity 14 when the piston rod moves in a reverse stroke mode.
The buffer honeycomb 2 is divided into a forward stroke buffer honeycomb 201 and a reverse stroke buffer honeycomb 202, and the honeycomb between the plunger cylinder 1 and the piston rod 9 is the forward stroke buffer honeycomb 201, and plays a role when the buffer device is subjected to external load to cause the piston rod 9 to move in a forward stroke, so that part of impact load is relieved. And the honeycomb between piston rod 9 and bottom end baffle 10 is reverse stroke buffering honeycomb 202, and the effect is played when leading to piston rod 9 to take place to kick-back owing to receive high-pressure gas's resilience force after buffer unit accomplishes the buffering task to alleviate some resilience force. In addition, the impact load of the piston rod 9 is large when the piston rod 9 moves in a forward stroke, and the thrust force received when the piston rod 9 moves in a reverse stroke only has the resilience force of high-pressure gas, so that the forward stroke buffering honeycomb 201 is a strong honeycomb, the reverse stroke buffering honeycomb 202 is a weak honeycomb, and the connecting screw 3 is threaded only at the part connected with the bottom end baffle plate 10, and the rest parts are polished rods, so that when the piston rod 9 rebounds under the rebound action of the high-pressure gas, the piston rod 9 and the reverse stroke buffering honeycomb 202 can move relative to the bottom end baffle plate 10, and the damage to the structure caused by rigid reverse rebound is avoided. The ratchets 8 and the pawls 6 form a reverse rebound structure which plays a role when the piston rod 9 generates reverse stroke movement and can limit the reverse stroke movement of the bottom end baffle 10.
The working process of the buffer device is as follows: when the carrier lands, impact load is transmitted to the piston rod 9 connected with the carrier along the load element 12, the piston rod 9 drives the reverse stroke buffering honeycomb 2 and the bottom end baffle 10 to move in a forward stroke mode together, oil in the oil cavity 15 is pushed into the air cavity 14, meanwhile, the piston rod 9 compresses the forward stroke buffering honeycomb 201, and the buffering force of the honeycomb, the oil damping force and air resistance absorb the impact load received by the piston rod 9 together. After the impact load born by the piston rod 9 is absorbed, because the air in the air chamber 14 is compressed, the pressure in the air chamber 14 is increased, the high-pressure gas in the air chamber 14 can generate resilience force on the piston rod 9, the piston rod 9 generates reverse stroke motion under the action of the resilience force at the moment, and the bottom baffle 10 is limited under the action of the ratchet mechanism, so that the piston rod 9 compresses the reverse stroke buffer honeycomb 202 under the action of the resilience force, the buffer force of the honeycomb and the oil damping force block the rebound of the piston rod 9 together, and the flexible reverse rebound system is formed together with the ratchet mechanism.
Claims (10)
1. A low-resilience combined buffering device is characterized by comprising a plunger cylinder (1), a piston rod (9), a buffering honeycomb (2), a bottom end baffle (10) and a bottom end baffle (10) locking mechanism during reverse stroke movement of the piston rod;
the buffer honeycomb (2) comprises a forward stroke buffer honeycomb (201) and a reverse stroke buffer honeycomb (202), and the piston rod (9) comprises two cylinders separated by a middle separation plate;
a positive stroke buffer honeycomb (201) playing a role in positive stroke buffering is arranged between the plunger cylinder (1) and a partition plate of the piston rod (9);
and a reverse stroke buffer honeycomb (202) playing a role in reverse stroke buffering is arranged between the partition plate of the piston rod (9) and the bottom baffle (10).
2. A damper according to claim 1, characterized in that the plunger cylinder (1) comprises an outer cylinder, an inner cylinder and a plunger which are integrally provided; an annular bulge towards the circle center of the inner cylinder is arranged at the bottom end of the inner cylinder, and a sealing ring is arranged between the side surface of the annular bulge and the cylinder of the piston rod; the positive stroke buffer honeycomb (201) is arranged between the annular bulge and the partition plate of the piston rod.
3. The buffer device as claimed in claim 2, further comprising a connecting screw (3), wherein the connecting screw (3) is a socket head cap shoulder screw, one end of the connecting screw (3) passes through the through holes on the partition plate and the reverse stroke buffer honeycomb (202) to be in threaded connection with the bottom end baffle (10), and the shoulder at the other end is used for limiting the partition plate of the piston rod.
4. A damper according to claim 3, characterized in that the locking mechanism comprises a ratchet (8) arranged on the inner wall of the outer cylinder of the plunger cylinder (1) and a rotatable pawl (6) arranged at the bottom of the bottom end stop (10) and cooperating with the ratchet, wherein when the piston rod generates a resilience force to generate a reverse stroke movement, the pawl is blocked on the ratchet, and the movement of the bottom end stop is retarded.
5. The cushioning device of claim 4, wherein the bottom of the bottom end stop is provided with a square groove, the square groove is provided with a positioning hole, the pawl is provided with a through hole, and the spring plunger penetrates through the through hole on the pawl to arrange the pawl in the positioning hole of the square groove and enable the pawl to freely rotate around the spring plunger.
6. A buffer device according to claim 5, characterized in that it further comprises a spring plate, which is mounted in a slot at the bottom of the bottom end baffle (10) and tightly contacts the pawl (6) and presses the pawl (6) to make the pawl (6) rotate only in a predetermined direction, thus preventing the pawl (6) from rotating in the opposite direction and ensuring the pawl (6) to catch the ratchet (8).
7. The buffer device according to claim 6, wherein the ratchet bar (8) is an arc long plate provided with ratchets, countersunk holes for installing the fixing screws (4) are formed in two sides of the middle part of the ratchet bar (8), and the ratchet bar (8) is fixed on the inner wall of the outer cylinder (101) of the plunger cylinder (1) by the fixing screws (4).
8. The buffer device according to claim 7, wherein four ratchet bars (8) are arranged along the circumferential direction of the inner wall of the outer cylinder (101) of the plunger cylinder (1), and four groups of pawls and spring pieces are arranged to match with the ratchet bars; the bottom baffle (10) is a disc-shaped structure, four threaded grooves matched with the connecting screws are evenly distributed in the circumferential direction on the top of the bottom baffle (10), and the number of the connecting screws is four.
9. The buffer device as claimed in claim 8, wherein the positive stroke buffer honeycomb (201) is strong honeycomb, the reverse stroke buffer honeycomb (202) is weak honeycomb, the static crushing force of the strong and weak honeycomb is 2500-3000N different, and the internal structural unit of the buffer honeycomb (2) is hexagonal.
10. A buffer device according to claim 9, wherein the inner cylinder (102) and the plunger (103) are provided with sealing ring grooves for mounting the sealing ring (7), the side wall of the plunger (103) is provided with two rows of plunger holes (104) for facilitating oil-gas exchange between the inside of the plunger (103) and the inside of the inner cylinder (102), and the bottom end of the plunger (103) is provided with a side oil hole (105) and a main oil hole (106) for facilitating pressing oil in the oil-liquid chamber (15) into the air chamber (14);
a variable cross-section oil needle (902) is arranged in a cylinder at the front part of the piston rod (9), a groove for placing a sealing ring (7) and a backflow hole (901) are formed in the front end of the cylinder, oil in an air cavity (14) can flow back into the backflow cavity (13) through the backflow hole (901) when the piston rod (9) moves in a reverse stroke mode, a thread groove is formed in the tail end of a cylinder at the tail part and used for installing a load element (12), and four countersunk holes are formed in the joint of the two cylinders in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110423596.6A CN113173269B (en) | 2021-04-20 | 2021-04-20 | Low-resilience combined buffering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110423596.6A CN113173269B (en) | 2021-04-20 | 2021-04-20 | Low-resilience combined buffering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113173269A true CN113173269A (en) | 2021-07-27 |
| CN113173269B CN113173269B (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110423596.6A Active CN113173269B (en) | 2021-04-20 | 2021-04-20 | Low-resilience combined buffering device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151502A (en) * | 2021-11-18 | 2022-03-08 | 湖北航天技术研究院总体设计所 | Take low separation buffer of impact of self-locking function |
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| CN102060106A (en) * | 2010-12-21 | 2011-05-18 | 南京航空航天大学 | Buffer landing leg for planet detector |
| KR20130139619A (en) * | 2012-06-13 | 2013-12-23 | 한국항공우주연구원 | Shock absorber for spacecraft lander |
| KR101807424B1 (en) * | 2016-09-08 | 2017-12-12 | 한국항공우주연구원 | Shock absorber having multiple extruding structure |
| CN109436380A (en) * | 2018-12-29 | 2019-03-08 | 哈尔滨工业大学 | A kind of length adjustable supporting leg buffer for rocket landing mechanism |
| CN109625337A (en) * | 2019-01-22 | 2019-04-16 | 哈尔滨工业大学 | A kind of reusable rocket leg formula buffer with time-shared serial Trigger Function |
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2021
- 2021-04-20 CN CN202110423596.6A patent/CN113173269B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060106A (en) * | 2010-12-21 | 2011-05-18 | 南京航空航天大学 | Buffer landing leg for planet detector |
| KR20130139619A (en) * | 2012-06-13 | 2013-12-23 | 한국항공우주연구원 | Shock absorber for spacecraft lander |
| KR101807424B1 (en) * | 2016-09-08 | 2017-12-12 | 한국항공우주연구원 | Shock absorber having multiple extruding structure |
| CN109436380A (en) * | 2018-12-29 | 2019-03-08 | 哈尔滨工业大学 | A kind of length adjustable supporting leg buffer for rocket landing mechanism |
| CN109625337A (en) * | 2019-01-22 | 2019-04-16 | 哈尔滨工业大学 | A kind of reusable rocket leg formula buffer with time-shared serial Trigger Function |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151502A (en) * | 2021-11-18 | 2022-03-08 | 湖北航天技术研究院总体设计所 | Take low separation buffer of impact of self-locking function |
| CN114151502B (en) * | 2021-11-18 | 2023-09-22 | 湖北航天技术研究院总体设计所 | Separation buffer device with self-locking function and low impact |
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| Publication number | Publication date |
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| CN113173269B (en) | 2022-03-15 |
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