CN103600839A - Retractable actuator cylinder - Google Patents
Retractable actuator cylinder Download PDFInfo
- Publication number
- CN103600839A CN103600839A CN201310409651.1A CN201310409651A CN103600839A CN 103600839 A CN103600839 A CN 103600839A CN 201310409651 A CN201310409651 A CN 201310409651A CN 103600839 A CN103600839 A CN 103600839A
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- joint
- piston rod
- urceolus
- end cap
- ozzle
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Abstract
The invention relates to a retractable actuator cylinder, belongs to the technical field of undercarriage designs, and particularly relates to a dual-redundancy retractable actuator cylinder. The actuator cylinder is characterized in that the actuator cylinder comprises an actuator cylinder shell formed by a joint (1), an outer cylinder (4) and an end cap (6); the joint (1) is provided with a nozzle (2) and a nozzle (3) and extends out a long and thin pipe; the end cap (6) and the outer cylinder (4) are connected through screws; the end cap (6) is provided with a nozzle (5); the outer cylinder (4) and the joint (1) are connected through screws; a ring-shape cavity is formed between the inner wall of the outer cylinder (4) and the outer wall of the long and thin pipe of the joint (1); a piston rod (7) with a piston (8) is installed in the ring-shape cavity; and the piston rod (7) extends out through the center hole of the end cap (6). The actuator cylinder has a compact arrangement and can satisfy a dual-redundancy design of the actuator cylinder under the condition of not increasing the structural length of the actuator cylinder. The actuator cylinder takes little space and has a light weight, and a risk that rubber gasket is cut is nonexistent.
Description
Technical field
The invention belongs to undercarriage designing technique, relate to the pressurized strut structure of a kind of pair of remaining.
Background technology
The two redundancy designs of current domestic pressurized strut mainly contain the design of pressurized strut tandem or increase floating piston two schemes.
The design of pressurized strut tandem is generally the piston rod (as Fig. 1) of arranging that in urceolus two tandems distribute, each piston rod is realized identical stroke, generally to adopt in small-sized pressurized strut, the inevitable pressurized strut scantling length that greatly increases of design as adopted in large-scale pressurized strut, increase pressurized strut weight, to structural arrangement, bring very large difficulty.As increased floating piston in pressurized strut, when floating piston is by ozzle B, very easily scratch cushion rubber, thereby make pressurized strut occur leakage of oil failure of removal.
Summary of the invention
The object of the invention is: the present invention proposes a kind of parallel pressurized strut integrated design, in the situation that not increasing pressurized strut scantling length, meet two redundancy designs of pressurized strut.Three separate enclosed cavities have been arranged in this pressurized strut, comprise two piston rod elongate chamber, a piston rod is regained chamber, can utilize the two independent hydraulically controlled source of cover piston rod to extend, realize the two redundancy designs of pressurized strut, and seal ring can not pass through ozzle, thereby avoid occurring the oil leakage fault because of cushion rubber cut wound.
Technical scheme of the present invention is: a kind of retractable actuating cylinder, is characterized in that: comprise a pressurized strut shell being comprised of joint 1, urceolus 4, end cap 6, be provided with ozzle 2 and ozzle 3 on joint 1, and extend one section of elongated tubular; End cap 6 is threaded connection with urceolus 4, is provided with ozzle 5 on end cap 6; Urceolus 4 is threaded connection with joint 1, and forms an annular chamber between the elongated tubular outer wall of urceolus 4 inwalls and joint 1, is equipped with one with the piston rod 7 of piston 8 in this ring cavity, and piston rod 7 is stretched out by the centre hole of end cap 6.
Piston rod 7 inwardly has an elongated blind hole at piston 8 places, and the elongated tubular outside that piston rod 7 is enclosed within joint 1 by this blind hole packs in urceolus 4.Between the elongated tubular termination of joint 1 and piston rod 7, be provided with seal ring, the common C chamber communicating with ozzle 2 that forms of endoporus of this elongated tubular and piston rod 7.
Between piston 8 and urceolus 4, by seal ring, seal, above-mentioned annular chamber is separated into the A chamber communicating with ozzle 3 and the B chamber communicating with ozzle 5.
Between joint 1 and urceolus 4, be respectively arranged with seal ring between end cap 6 and urceolus 4 and piston rod 7, guarantee A chamber, B chamber and extraneous leak tightness.
The invention has the beneficial effects as follows:
Characteristics of compact layout of the present invention, in the situation that not increasing pressurized strut scantling length, meets two redundancy designs of pressurized strut, takes up room little, lightweight, and does not exist cushion rubber to be hurt risk.Be arranged on certain undercarriage jack, meet the normal folding and unfolding of alighting gear and emergent put use relatively independent hydraulic power source requirement in, overcome the difficulty that cannot arrange two pressurized struts, and reliable through its principle of draw-in and draw-off function verification experimental verification, implement convenient.
Accompanying drawing explanation
Fig. 1 is series type pressurized strut design diagram
Fig. 2 is pressurized strut structural plan
Fig. 3 is joint 1 part schematic diagram
Fig. 4 is the full extended position figure of pressurized strut
Fig. 5 is pressurized strut full compression site plan
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Referring to Fig. 2～Fig. 5, a kind of retractable actuating cylinder, is characterized in that: comprise a pressurized strut shell being comprised of joint 1, urceolus 4, end cap 6, as shown in Figure 2.On joint 1, be provided with ozzle 2 and ozzle 3, and extend one section of elongated tubular (as Fig. 3); End cap 6 is threaded connection with urceolus 4, is provided with ozzle 5 on end cap 6; Urceolus 4 is threaded connection with joint 1, and forms an annular chamber between the elongated tubular outer wall of urceolus 4 inwalls and joint 1, is equipped with one with the piston rod 7 of piston 8 in this ring cavity, and piston rod 7 is stretched out by the centre hole of end cap 6.
Piston rod 7 inwardly has an elongated blind hole at piston 8 places, and the elongated tubular outside that piston rod 7 is enclosed within joint 1 by this blind hole packs in urceolus 4.Between the elongated tubular termination of joint 1 and piston rod 7, be provided with seal ring, the endoporus of this elongated tubular and piston rod 7 is common to be formed the ，Gai chamber, C chamber communicating with ozzle 2 and is generally used for and realizes the playing function of meeting an urgent need;
Between piston 8 and urceolus 4, by seal ring, seal, above-mentioned annular chamber is separated into the A chamber communicating with ozzle 3 and the ，Zhe Liang chamber, B chamber communicating with ozzle 5 is generally used for the normal draw-in and draw-off function of realizing pressurized strut;
Between joint 1 and urceolus 4, be respectively arranged with seal ring between end cap 6 and urceolus 4 and piston rod 7, guarantee A chamber, B chamber and extraneous leak tightness.
Pressurized strut has three chambeies, three ozzles as shown in the above description, will guarantee sealing property and keep sealing with the external world between each chamber of pressurized strut, and each chamber is separate, has guaranteed that pressurized strut can be used different hydraulic power sources to realize different draw-in and draw-off functions.
Principle of work of the present invention is: when alighting gear normally puts down, fluid enters pressurized strut A chamber by ozzle 3, promotes piston rod and stretches out, and makes gear down; When alighting gear is normally packed up, fluid enters pressurized strut B chamber by ozzle 5, promotes piston rod and regains, and makes undercarriage stowage; When alighting gear is emergent while putting, fluid enters pressurized strut C chamber by ozzle 2 oil-feeds, promotes piston rod and stretches out, and makes gear down.
Aircraft is in design process, can be in the situation that main hydraulic power source loses efficacy according to general design requirement alighting gear, separately with a set of independent hydraulically controlled source emergency extension alighting gear, this landing gear compartment space, position is nervous, be difficult to arrange the pressurized strut of two independent pressurized struts or a tandem piston rod design, as used floating piston design to worry that it in use lost efficacy cushion rubber cut wound.For addressing the above problem, bold proposition this brand-new pressurized strut version, in the situation that not increasing pressurized strut scantling length, meet two redundancy designs of pressurized strut, and it is little to take up room.This design plan has successfully solved the problem in aircraft Landing Gear Design, has reached master operation requirement completely, and service condition is good.
Claims (4)
1. a retractable actuating cylinder, is characterized in that: comprise a pressurized strut shell being comprised of joint (1), urceolus (4), end cap (6), be provided with ozzle (2) and ozzle (3) on joint (1), and extend one section of elongated tubular; End cap (6) is threaded connection with urceolus (4), is provided with ozzle (5) on end cap (6); Urceolus (4) is threaded connection with joint (1), and form an annular chamber between the elongated tubular outer wall of urceolus (4) inwall and joint (1), the piston rod (7) that a band piston (8) is housed in this ring cavity, piston rod (7) is stretched out by the centre hole of end cap (6).
2. retractable actuating cylinder according to claim 1, is characterized in that: piston rod (7) locates inwardly to have an elongated blind hole at piston (8), and the elongated tubular outside that piston rod (7) is enclosed within joint (1) by this blind hole packs in urceolus (4).Between the elongated tubular termination of joint (1) and piston rod (7), be provided with seal ring, the common C chamber communicating with ozzle (2) that forms of endoporus of this elongated tubular and piston rod (7).
3. retractable actuating cylinder according to claim 1, is characterized in that: between piston (8) and urceolus (4), by seal ring, seal, above-mentioned annular chamber is separated into the A chamber communicating with ozzle (3) and the B chamber communicating with ozzle (5).
4. retractable actuating cylinder according to claim 1, is characterized in that: between joint (1) and urceolus (4), be respectively arranged with seal ring between end cap (6) and urceolus (4) and piston rod (7), guarantee A chamber, B chamber and extraneous leak tightness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310409651.1A CN103600839A (en) | 2013-09-10 | 2013-09-10 | Retractable actuator cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310409651.1A CN103600839A (en) | 2013-09-10 | 2013-09-10 | Retractable actuator cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103600839A true CN103600839A (en) | 2014-02-26 |
Family
ID=50119132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310409651.1A Pending CN103600839A (en) | 2013-09-10 | 2013-09-10 | Retractable actuator cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103600839A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107813918A (en) * | 2017-10-27 | 2018-03-20 | 中国舰船研究设计中心 | Sealing of hole cover plate drive device with hydraulic drives |
| CN110844052A (en) * | 2019-11-04 | 2020-02-28 | 中航飞机起落架有限责任公司 | Undercarriage folding and unfolding actuator cylinder capable of being loaded in delayed mode |
| CN114408161A (en) * | 2021-12-28 | 2022-04-29 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Three-redundancy double-cavity actuator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2803222A (en) * | 1953-11-12 | 1957-08-20 | Bendix Aviat Corp | Retracting mechanism for aircraft landing gear |
| US3605568A (en) * | 1969-09-15 | 1971-09-20 | Western Hydraulics Inc | Hydraulic actuator with center lock |
| US4167891A (en) * | 1976-08-12 | 1979-09-18 | Teijin Seiki Company, Limited | Hydraulic actuator |
| CN1986334A (en) * | 2005-12-23 | 2007-06-27 | 梅西耶-布加蒂公司 | Telescopic actuator with a main rod and an auxiliary rod, and method applying said actuator |
-
2013
- 2013-09-10 CN CN201310409651.1A patent/CN103600839A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2803222A (en) * | 1953-11-12 | 1957-08-20 | Bendix Aviat Corp | Retracting mechanism for aircraft landing gear |
| US3605568A (en) * | 1969-09-15 | 1971-09-20 | Western Hydraulics Inc | Hydraulic actuator with center lock |
| US4167891A (en) * | 1976-08-12 | 1979-09-18 | Teijin Seiki Company, Limited | Hydraulic actuator |
| CN1986334A (en) * | 2005-12-23 | 2007-06-27 | 梅西耶-布加蒂公司 | Telescopic actuator with a main rod and an auxiliary rod, and method applying said actuator |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107813918A (en) * | 2017-10-27 | 2018-03-20 | 中国舰船研究设计中心 | Sealing of hole cover plate drive device with hydraulic drives |
| CN107813918B (en) * | 2017-10-27 | 2019-09-10 | 中国舰船研究设计中心 | Sealing of hole cover board driving device with hydraulic drives |
| CN110844052A (en) * | 2019-11-04 | 2020-02-28 | 中航飞机起落架有限责任公司 | Undercarriage folding and unfolding actuator cylinder capable of being loaded in delayed mode |
| CN110844052B (en) * | 2019-11-04 | 2021-04-30 | 中航飞机起落架有限责任公司 | Undercarriage folding and unfolding actuator cylinder capable of being loaded in delayed mode |
| CN114408161A (en) * | 2021-12-28 | 2022-04-29 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Three-redundancy double-cavity actuator |
| CN114408161B (en) * | 2021-12-28 | 2023-05-30 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Three-redundancy double-cavity actuator |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140226 |