CN103910059B - One can carry pressurized strut - Google Patents
One can carry pressurized strut Download PDFInfo
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- CN103910059B CN103910059B CN201410091836.7A CN201410091836A CN103910059B CN 103910059 B CN103910059 B CN 103910059B CN 201410091836 A CN201410091836 A CN 201410091836A CN 103910059 B CN103910059 B CN 103910059B
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- pressurized strut
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Abstract
The present invention relates to one and can carry pressurized strut, sleeved at piston rod overcoat, this sleeve moves back and forth along sleeve axis through the driving of slip expansion mechanism and realizes the relative urceolus reciprocal telescopic of sleeve, the front end of sleeve is connected with piston rod by the socket cover be sleeved on outside piston rod, and the tail end of sleeve is closed; Described pressurized strut emergency starting device comprise be sleeved on piston rod outer and be placed in floating piston between urceolus end cap and socket cover, locking mechanism floating piston is locked together on sleeve, outer cylinder front end is provided with the emergent free flow coupling to passing into pressure oil between urceolus end cap and floating piston, and it is sealed that described locking mechanism can be removed floating piston under the promotion of pressure oil.The present invention can carry pressurized strut as one, by integrated for the bearing function of emergency starting function and sleeve, simplifies the structure, has saved space, alleviated system weight.
Description
Technical field
The present invention relates to one and can carry pressurized strut.
Background technology
For adapting to the requirement of aiMonhiness authority, aircraft system is necessary for the pressurized strut configuration emergency starting device of Landing Gear System, the emergency mode that current home and abroad is commonly used mainly contains two kinds: the first is for meeting an urgent need by rope arrangement, this emergency mode is because of needs layout rope arrangement, take up room comparatively large, improve complexity and the weight of system, in addition, because the restriction of motor mechanism, the emergent load that rope arrangement provides is also smaller.The second emergent unlocking device is electrical actuation cylinder emergency facility, it and hydraulic lock pressurized strut integrate, pressurized strut action is driven by independent electric device during Emergency use, this device requires high to motor, greatly improve design cost, which also exists the less problem of load equally in addition.
The common feature of above-mentioned Liang Zhong emergent unlocking mechanism pressurized strut is: the space that needs take is larger, Heavy Weight, complex structure.This has a negative impact to the loss of weight of aircraft and space availability ratio.
Summary of the invention
The object of the invention is to, for the deficiencies in the prior art, provide one to carry pressurized strut, by emergency function and bearing function integrated, simplify the internal structure of an organization, expendable weight, saving space.
Technical scheme of the present invention is, one can carry pressurized strut, comprise hollow and urceolus, the urceolus end cap being arranged on outer cylinder front end, cover that tail end opens wide load piston rod in urceolus and pressurized strut emergency starting device, described piston rod overcoat is sleeved, this sleeve moves back and forth along sleeve axis through the driving of slip expansion mechanism and realizes the relative urceolus reciprocal telescopic of sleeve, the front end of sleeve is connected with piston rod by the socket cover be sleeved on outside piston rod, and the tail end of sleeve is closed; Described pressurized strut emergency starting device comprise be sleeved on piston rod outer and be placed in floating piston between urceolus end cap and socket cover, locking mechanism floating piston is locked together on sleeve, outer cylinder front end is provided with the emergent free flow coupling to passing into pressure oil between urceolus end cap and floating piston, and it is sealed that described locking mechanism can be removed floating piston under the promotion of pressure oil.
It is sealed that locking mechanism can be removed sleeve under the promotion of pressure oil, and it is protruding that floating piston can promote sleeve.
Described slip expansion mechanism comprise be sleeved on piston rod afterbody piston, from tail end penetrate in piston rod, piston is fixed nut, be located at piston rod oil suction chamber in piston rod and piston rod oil back chamber vertically, and be provided with oil inlet pipe union and be connected with piston rod oil suction chamber and piston rod oil back chamber respectively with oil returning pipe joint, the tail end inwall of described piston and sleeve forms sleeve oil suction chamber, is provided with the through hole of coupling bush oil suction chamber and piston rod oil suction chamber in nut; Described sleeve lining, between socket cover and piston, form sleeve oil back chamber, and be provided with the fuel return hole for connecting piston rod oil back chamber and sleeve oil back chamber at the rear side of piston rod.
Piston rod oil suction chamber, sleeve oil suction chamber refer to the access way of pressure oil when sleeve stretches out, and namely oil inlet pipe union is provided with electromagnetic valve, and when sleeve stretches out, pressure oil, from oil inlet pipe union oil-feed, enters sleeve oil suction chamber through piston rod oil suction chamber; And piston rod oil back chamber, sleeve oil back chamber refer to the access way of pressure oil when sleeve is regained.
The tail end of described socket cover is provided with the piston ring corresponding with fuel return hole.
Described piston rod oil back chamber tail end is provided with the damping hole be connected with sleeve oil back chamber.This damping hole and described piston ring form damping cavity when sleeve moves to end.
Described locking mechanism comprises the snap ring be sleeved on outside floating piston, and the outer tube inner wall corresponding with snap ring is provided with deep-slotted chip breaker, and the rear of deep-slotted chip breaker is recessed to urceolus center shaft, and described snap ring is circumferentially with an opening.
The rear of deep-slotted chip breaker is recessed to urceolus center shaft, namely stops snap ring rearward to move.
After the folding and unfolding that can not realize alighting gear is broken down in normal pressurized strut, start emergency starting device, high pressure oil enters between urceolus end cap and floating piston by emergent free flow coupling, thus on floating piston, produce certain hydraulic coupling F1 promote piston and move right, now, snap ring on floating piston stops floating piston to move, and the strained condition of snap ring as shown in Figure 3, there is F3, F2 application force, when floating piston does not move, F3 and F power is equal, and snap ring has a breach in the circumferential, snap ring reduced diameter is forced under the effect of centripetal force F2, after snap ring external diameter is less than outer tube inner wall, hydraulic coupling F moves after promoting floating floating piston, thus promotion sleeve stretches out, realize pressurized strut emergency function, and former normal pressurized strut inner fluid is interconnected by electromagnetic valve and is connected with fuel tank, guarantee the sleeve energy free-extension of pressurized strut.
The tail end of described urceolus is provided with the sensor of belt sensor driving lever, and sensor driving lever is deeply to outer tube inner wall, and on front side of described sleeve, periphery is provided with outwardly sleeve stop platform.
Packing ring is provided with, for adjusting the entire length of urceolus, namely for adjusting the stroke of sleeve between the front end of described urceolus and urceolus end cap.
Its principle of work is: urceolus is fixed on by urceolus end cap to be installed on stand, during normal work, as shown in Figure 4, pressure oil enters sleeve oil suction chamber by oil inlet pipe union through the piston rod oil suction chamber of piston rod, promotion sleeve stretches out, when to end of travel, after piston ring moves to fuel return hole position, the pressure of oil back chamber promotes piston ring and touch socket cover end face, make pressure oil can not through fuel return hole oil return, between socket cover and piston, the hydraulic oil of sleeve oil back chamber can only enter the oil back chamber of piston rod through damping hole, make pressurized strut can obtain actv. buffering at end, when sleeve moves to bottom, sleeve stop platform on sleeve will promote the driving lever of sensor, to put in place signal to sensor passes, when pressurized strut is regained, pressure oil enters the piston rod oil back chamber of piston rod by oil returning pipe joint, then enters sleeve oil back chamber, and pushing set cover band moving sleeve is regained.When the normal fuel injection system failure (namely pressure oil does not enter by oil inlet pipe union), as shown in Figure 5, now, in order to sleeve is released, pressure oil can enter between urceolus end cap and floating piston by emergent free flow coupling, now, is arranged in the groove of snap ring on floating piston retraction floating piston under the effect of the pressure, thus make floating piston lock-off, under the effect of pressure oil, promote sleeve skid off.
The present invention can carry pressurized strut as one, by integrated for the bearing function of emergency starting function and sleeve, simplifies the structure, has saved space, alleviated system weight; And on fixing piston rod, be provided with the import and export of oil circuit, save the arrangement space of pipeline, bottom piston rod, be provided with damping hole simultaneously, make pressurized strut reduce kinematic velocity at end of travel, reduce impact load.The pressurized strut of this pattern can be applicable to that space arrangement requirement is strict, lock pin need bear larger load and with the lock pressurized strut mechanism of emergency function.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the present invention;
Fig. 2 is the structural representation of Fig. 1 Elastic snap ring;
Fig. 3 is floating piston local pressure sketch in Fig. 1;
Fig. 4 is for stretching out view when pressurized strut shown in Fig. 1 normally works;
Fig. 5 stretches out view for during the emergency of pressurized strut shown in Fig. 1.
Detailed description of the invention
As shown in Figure 1, one can carry pressurized strut, comprise hollow and urceolus 16, the urceolus end cap 8 being arranged on urceolus 16 front end, cover that tail end opens wide load piston rod 3 in urceolus 16 and pressurized strut emergency starting device, described piston rod 3 overcoat sleeved 15, this sleeve 15 moves back and forth along sleeve 15 axis through the driving of slip expansion mechanism and realizes sleeve 15 urceolus 16 reciprocal telescopic relatively, the front end of sleeve 15 is connected with piston rod 3 by the socket cover 14 be sleeved on outside piston rod 3, and the tail end of sleeve 15 is closed; Described pressurized strut emergency starting device comprises that to be sleeved on piston rod 3 outer and be placed in floating piston 11 between urceolus end cap 8 and socket cover 14, floating piston 11 is locked together in the locking mechanism on sleeve 15, outer cylinder front end 16 is provided with the emergent free flow coupling 32 to passing into pressure oil between urceolus end cap 8 and floating piston 11, and it is sealed that described locking mechanism can be removed floating piston under the promotion of pressure oil.
Slip expansion mechanism comprise be sleeved on piston rod 3 afterbody piston 23, to penetrate nut 21 fixing for piston 3 from tail end in piston rod 3, be located at piston rod oil suction chamber 34 in piston rod 3 and piston rod oil back chamber 35 vertically, and be provided with oil inlet pipe union 7 and be connected with piston rod oil suction chamber 34 and piston rod oil back chamber 35 respectively with oil returning pipe joint 1, described piston 23 forms sleeve oil suction chamber 36 with the tail end inwall of sleeve 15, is provided with the through hole of coupling bush oil suction chamber 36 and piston rod oil suction chamber 34 in nut 21; Described sleeve 15 inwall, between socket cover 14 and piston 23, form sleeve oil back chamber 37, and be provided with the fuel return hole 38 for connecting piston rod oil back chamber 35 and sleeve oil back chamber 37 at the rear side of piston rod 3.
The tail end of socket cover 14 is provided with the piston ring 24 corresponding with fuel return hole 38.
Piston rod oil back chamber 35 tail end is provided with the damping hole 39 be connected with sleeve oil back chamber 37.
As shown in Figure 2, locking mechanism comprises the snap ring 10 be sleeved on outside floating piston 11, urceolus 16 inwall corresponding with snap ring 10 is provided with deep-slotted chip breaker 40, and the rear of deep-slotted chip breaker 40 is recessed to urceolus 16 center shaft, and described snap ring 10 is circumferentially with an opening.
The tail end of urceolus 16 is provided with the sensor 17 of belt sensor driving lever 33, and sensor driving lever 33 is deeply to urceolus 16 inwall, and on front side of described sleeve 15, periphery is provided with outwardly sleeve stop platform 41.
Packing ring 9 is provided with between the front end of urceolus 16 and urceolus end cap 8.
Claims (7)
1. one kind can carry pressurized strut, comprise hollow and tail end open wide urceolus (16), be arranged on the urceolus end cap (8) of urceolus (16) front end, piston rod (3) in cover loading urceolus (16) and pressurized strut emergency starting device, it is characterized in that, described piston rod (3) overcoat sleeved (15), this sleeve (15) moves back and forth along sleeve axis through the driving of slip expansion mechanism and realizes the relative urceolus of sleeve (16) reciprocal telescopic, the front end of sleeve (15) is connected with piston rod (3) by being sleeved on piston rod (3) socket cover outward (14), and the tail end of sleeve (15) is closed, described pressurized strut emergency starting device comprises and is sleeved on piston rod (3) and be placed in floating piston (11) between urceolus end cap (8) and socket cover (14), floating piston (11) is locked together in the locking mechanism on sleeve (15) outward, urceolus (16) front end is provided with the emergent free flow coupling (32) to passing into pressure oil between urceolus end cap (8) and floating piston (11), and it is sealed that described locking mechanism can be removed floating piston under the promotion of pressure oil.
2. pressurized strut can be carried according to claim 1, it is characterized in that, described slip expansion mechanism comprises the piston (23) being sleeved on piston rod (3) afterbody, penetrate nut (21) that piston rod (3) is fixing in piston rod (3) from tail end, be located at the piston rod oil suction chamber (34) in piston rod (3) and piston rod oil back chamber (35) vertically, and be provided with oil inlet pipe union (7) and be connected with piston rod oil suction chamber (34) and piston rod oil back chamber (35) respectively with oil returning pipe joint (1), described piston (23) forms sleeve oil suction chamber (36) with the tail end inwall of sleeve (15), the through hole of coupling bush oil suction chamber (36) and piston rod oil suction chamber (34) is provided with in nut (21), described sleeve (15) inwall, between socket cover (14) and piston (23), form sleeve oil back chamber (37), and be provided with the fuel return hole (38) for connecting piston rod oil back chamber (35) and sleeve oil back chamber (37) at the rear side of piston rod (3).
3. can carry pressurized strut according to claim 2, it is characterized in that, the tail end of described socket cover (14) is provided with the piston ring (24) corresponding with fuel return hole (38).
4. can carry pressurized strut according to claim 2, it is characterized in that, described piston rod oil back chamber (35) tail end is provided with the damping hole (39) be connected with sleeve oil back chamber (37).
5. pressurized strut can be carried according to claim 1 or 2, it is characterized in that, described locking mechanism comprises and is sleeved on floating piston (11) snap ring outward (10), urceolus (16) inwall corresponding with snap ring (10) is provided with deep-slotted chip breaker (40), the rear of deep-slotted chip breaker (40) is recessed to urceolus (16) center shaft, and described snap ring (10) is circumferentially with an opening.
6. pressurized strut can be carried according to claim 1 or 2, it is characterized in that, the tail end of described urceolus (16) is provided with the sensor (17) of belt sensor driving lever (33), sensor driving lever (33) is deeply to urceolus (16) inwall, and periphery, described sleeve (15) front side is provided with outwardly sleeve stop platform (41).
7. can carry pressurized strut according to claim 1 or 2, it is characterized in that, between the front end of described urceolus (16) and urceolus end cap (8), be provided with packing ring (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410091836.7A CN103910059B (en) | 2014-03-13 | 2014-03-13 | One can carry pressurized strut |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410091836.7A CN103910059B (en) | 2014-03-13 | 2014-03-13 | One can carry pressurized strut |
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| Publication Number | Publication Date |
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| CN103910059A CN103910059A (en) | 2014-07-09 |
| CN103910059B true CN103910059B (en) | 2015-10-14 |
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| CN201410091836.7A Active CN103910059B (en) | 2014-03-13 | 2014-03-13 | One can carry pressurized strut |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337855A (en) * | 2016-09-23 | 2017-01-18 | 江西洪都航空工业集团有限责任公司 | Actuating cylinder structure achieving quick disassembling and adjustment |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089853B (en) * | 2016-08-25 | 2018-04-17 | 中航飞机起落架有限责任公司 | The pressurized strut and its locking of a kind of built-in machines lock, the method unlocked |
| EP3597940A1 (en) * | 2018-07-20 | 2020-01-22 | Goodrich Actuation Systems Limited | Locking mechanism |
| CN109278989B (en) * | 2018-08-24 | 2022-02-22 | 中国航空工业集团公司沈阳飞机设计研究所 | Locking mechanism of stay bar device |
| CN109334957B (en) * | 2018-11-29 | 2021-10-01 | 中国航空工业集团公司沈阳飞机设计研究所 | Lower connecting structure of undercarriage buffer |
| CN114132489B (en) * | 2021-11-25 | 2023-08-04 | 中航飞机起落架有限责任公司 | Bidirectional terminal load shedding actuating device and load shedding method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5184465A (en) * | 1990-09-28 | 1993-02-09 | The Boeing Company | Landing gear drag strut actuator having self-contained pressure charge for emergency use |
| CN102211660A (en) * | 2011-04-29 | 2011-10-12 | 中航飞机起落架有限责任公司 | Explosion type emergency unlocking device for built-in mechanical lock of actuator cylinder |
| CN102434521A (en) * | 2011-11-03 | 2012-05-02 | 中航飞机起落架有限责任公司 | Actuator cylinder capable of being as locking pin |
| CN102530244A (en) * | 2012-02-14 | 2012-07-04 | 南京航空航天大学 | All-electric retractable actuator cylinder suitable for laying landing gear down emergently and operating mode thereof |
| CN103466083A (en) * | 2013-08-30 | 2013-12-25 | 中航飞机起落架有限责任公司 | Emergency actuation cylinder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8827205B2 (en) * | 2009-05-08 | 2014-09-09 | Spectrum Aeronautical, Llc | Pneumatic blow-down actuator |
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2014
- 2014-03-13 CN CN201410091836.7A patent/CN103910059B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184465A (en) * | 1990-09-28 | 1993-02-09 | The Boeing Company | Landing gear drag strut actuator having self-contained pressure charge for emergency use |
| CN102211660A (en) * | 2011-04-29 | 2011-10-12 | 中航飞机起落架有限责任公司 | Explosion type emergency unlocking device for built-in mechanical lock of actuator cylinder |
| CN102434521A (en) * | 2011-11-03 | 2012-05-02 | 中航飞机起落架有限责任公司 | Actuator cylinder capable of being as locking pin |
| CN102530244A (en) * | 2012-02-14 | 2012-07-04 | 南京航空航天大学 | All-electric retractable actuator cylinder suitable for laying landing gear down emergently and operating mode thereof |
| CN103466083A (en) * | 2013-08-30 | 2013-12-25 | 中航飞机起落架有限责任公司 | Emergency actuation cylinder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337855A (en) * | 2016-09-23 | 2017-01-18 | 江西洪都航空工业集团有限责任公司 | Actuating cylinder structure achieving quick disassembling and adjustment |
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| CN103910059A (en) | 2014-07-09 |
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