CN104648661B - Normal releasing and retracting isolation system for plane undercarriage - Google Patents
Normal releasing and retracting isolation system for plane undercarriage Download PDFInfo
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- CN104648661B CN104648661B CN201310607963.3A CN201310607963A CN104648661B CN 104648661 B CN104648661 B CN 104648661B CN 201310607963 A CN201310607963 A CN 201310607963A CN 104648661 B CN104648661 B CN 104648661B
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Abstract
The invention belongs to the design field of a hydraulic control system in the plane design field and in particular relates to the field of the undercarriage emergency releasing control design. A normal releasing and retracting isolation system for a plane undercarriage is characterized in that a mechanical reversing bypass valve is additionally arranged on a pressure supplying oil line of a normal undercarriage control system, when the undercarriage is released at emergency, the bypass valve is mechanically controlled to be reversed, the pressure supplying oil line of the normal undercarriage releasing and retracting control system is switched off, and meanwhile, the normal releasing and retracting oil line is communicated for oil returning. The normal releasing and retracting isolation system for the plane undercarriage has the advantages that the quantity of attachments is reduced, the normal undercarriage releasing and retracting control system is completely isolated, and the influences of the clamping phenomenon of an undercarriage control valve and the oil returning blockage phenomenon of the normal undercarriage releasing and retracting actuating mechanism on the emergency releasing system are avoided.
Description
Technical field
The invention belongs to meeting an urgent need in the hydraulic control system design field in field of airplane design, specially undercarriage puts control
Design field.
Background technology
Undercarriage folding and unfolding control system generally comprises normal folding and unfolding control system and emergent place system.
The emergent place system of domestic existing undercarriage power generally normally puts down in undercarriage and increases emergent conversion on pipeline
Valve, emergent Emergency power source is supplied to undercarriage by emergent switching valve when putting and hatch door puts down pipeline, pass through oil extraction valve simultaneously
The fluid received in upper pipeline is drained into outside machine or fuel tank；External undercarriage generally gravity is met an urgent need and is put, and emergent putting is designed as
Increase solenoid directional control valve before undercarriage control valve voltage supply pipeline, undercarriage normal control system needs reversal valve during work to change
To voltage supply oil circuit and undercarriage control valve voltage supply hydraulic fluid port being connected, are provided with mechanical commutation on undercarriage stowage pipeline simultaneously
Valve, when carrying out emergent putting, solenoid directional control valve does not commutate, and mechanical commutation valve commutates simultaneously, now, the normal control piper of undercarriage
Disconnect with voltage supply oil circuit, undercarriage stowage pipeline links up oil return by mechanical commutation valve, the situation of uplock opened by undercarriage
Lower freely put down.
The emergent place system design less consideration impact to emergent place system for the normal extension and retraction system of Domestic Aircraft, abroad flies
Machine increased solenoid directional control valve, but this valve is also required to work when undercarriage normal system works, and increased system complexity,
Have also been introduced new trouble point simultaneously.In order to the impact of normal extension and retraction system is completely eliminated when undercarriage is met an urgent need and put, examine simultaneously
Consider simplified system design it is therefore desirable to design a set of undercarriage normal folding and unfolding shielding system is met an urgent need it is ensured that meeting an urgent need and putting actuator
During blow the gear down, normal for undercarriage extension and retraction system is isolated, makes normal folding and unfolding actuator servo-actuated.
Content of the invention
The purpose of the present invention is: a kind of normal folding and unfolding shielding system of undercarriage simple to operate, that reliability is high of design it is ensured that
Isolate normal extension and retraction system to the emergent interference put.
The technical scheme is that a kind of undercarriage normal folding and unfolding shielding system, including bypass valve 1, for force feed
Road 2, oil return circuit 3, hatch door control valve 4, hatch door normal folding and unfolding actuator 5, undercarriage normal folding and unfolding actuator 6, rise and fall
Frame control valve 7 is it is characterised in that bypass valve 1 is passed through in the voltage supply hydraulic fluid port parallel connection of hatch door control valve 4 and undercarriage control valve 7 simultaneously
P2 mouth be connected, voltage supply oil circuit 2 is connected with the p1 mouth of bypass valve 1, and oil return circuit 3 is connected with the o mouth of bypass valve 1, and undercarriage is just
The either on or off pipeline of the folding and unfolding pipeline of often folding and unfolding actuator 6 and hatch door normal folding and unfolding actuator 5 respectively with bypass valve 1
A, b, c, d mouth connects.
When bypass valve core 103 is in limit on the right-right-hand limit position, now hydraulic fluid port p1, p2 communication of bypass valve, hydraulic fluid port a, b, c, d simultaneously
And oil return opening o is turned off, this state allows the normal extension and retraction system of undercarriage to control undercarriage.
When bypass valve core 103 is in limit on the left position, p1, p2 completely close, and now hatch door control valve 4 and undercarriage control
The voltage supply hydraulic fluid port of valve 7 and voltage supply oil circuit 2 disconnect, and actuator port a, b, c, d and oil return opening o start to link up, and now undercarriage is normal
The either on or off pipeline of the folding and unfolding pipeline of folding and unfolding actuator 6 and hatch door normal folding and unfolding actuator 5 is communicated with oil return circuit 3,
Undercarriage normal folding and unfolding actuator 6 and hatch door normal folding and unfolding actuator 5 can be freely-movable, when undercarriage is met an urgent need and is put,
Follow emergent laying mechanism servo-actuated.
Undercarriage normal folding and unfolding actuator 5 and hatch door normal folding and unfolding actuator are by hydraulically powered actuator.
Described bypass valve 1 includes rocker arm body 101, housing 102, valve element 103 and back-moving spring 104, valve element 103 and reset
Spring 104 is arranged in the cavity of housing 102, and back-moving spring 104 one end withstands on housing 102 cavity left side, other end set
Withstand on valve element 103 left end convex shoulder, valve element 103 right-hand member stretches out the cavity of housing 102, and by the waist of rocker arm body 101 lower end
Shape hole is hinged with it, and rocker arm body 101 is also by rotating shaft and housing hinge.
The cavity cooperation of valve element 103 and housing 102 leaves 7 logical oil pockets, 7 logical oil pockets pass through p1 on housing 102,
P2, o, a, b, c, d mouth and extraneous UNICOM.Valve element 103, when limit on the right-right-hand limit position, connects in inside cavity between hydraulic fluid port p1, p2, oil
Mouth a, b, c, d and oil return opening o is blind end；When limit on the left position, hydraulic fluid port p1, p2 are blind end to valve element 103, hydraulic fluid port a,
Connect in inside cavity between b, c, d and oil return opening o.
Valve element 103 limit on the right-right-hand limit position is: valve element 103 is maintained at the convex shoulder of valve element 103 in the presence of back-moving spring bullet 104
It is stuck in the position on housing 102 cavity inner convex platform.
Valve element 103 limit on the left position is: valve element 103 overcomes the active force of back-moving spring 104 to move to housing 102 chamber to the left
The position that body left side is contacted with valve element 103 left side.
The present invention has the advantage that with beneficial effect is: increases machinery on undercarriage normal control system voltage supply oil circuit and changes
To bypass valve, in landing-gear emergency extension, mechanical handling bypass valve commutation, play disconnection undercarriage normal folding and unfolding control system
Voltage supply oil circuit normal folding and unfolding oil circuit is linked up the effect of oil return simultaneously, advantage is to decrease adnexa quantity, completely isolated rises
The normal extension and retraction system of the frame that falls, thus avoid undercarriage control valve clamping stagnation and undercarriage normal folding and unfolding actuator oil return is not freely right
The impact of emergent place system.
Brief description
Fig. 1 is a kind of undercarriage of the present invention normal folding and unfolding shielding system principle schematic；
Wherein, 1- bypass valve, 2- voltage supply oil circuit, 3- oil return circuit, 4- hatch door control valve, 5- hatch door normal folding and unfolding execution machine
Structure, the normal folding and unfolding actuator of 6- undercarriage, 7- undercarriage control valve.
Fig. 2 is a kind of principle schematic of the main accessories bypass valve of the normal shielding system of undercarriage of the present invention；
Wherein, 101- rocker arm body, 102- housing, 103- valve element, 104- back-moving spring.
Specific embodiment
With reference to Figure of description, the present invention is described in further detail.Refer to Fig. 1 to Fig. 2.
As shown in figure 1, the voltage supply hydraulic fluid port of hatch door control valve 4 and undercarriage control valve 7 p2 simultaneously passing through bypass valve 1 in parallel
Mouth is connected, and voltage supply oil circuit 2 is connected with the p1 mouth of bypass valve 1, and oil return circuit 3 is connected with the o mouth of bypass valve 1, and undercarriage is normally received
Put the either on or off pipeline of the folding and unfolding pipeline of actuator 6 and hatch door normal folding and unfolding actuator 5 respectively with a of bypass valve 1, b,
C, d mouth connects.The start that undercarriage normal folding and unfolding actuator 5 and hatch door normal folding and unfolding actuator are generally hydraulically operated
Device.
Described bypass valve 1 includes rocker arm body 101, housing 102, valve element 103 and back-moving spring 104, valve element 103 and reset
Spring 104 is arranged in housing 102, and back-moving spring 104 one end withstands on housing 102 cavity left side, and other end set withstands on valve
On core 103 left end convex shoulder, valve element 103 right-hand member stretches out the cavity of housing 102, and by the mounting hole of rocker arm body 101 lower end with
It is hinged, and rocker arm body 101 is also by rotating shaft and housing hinge.
The cavity cooperation of valve element 103 and housing 102 leaves 7 logical oil pockets, 7 logical oil pockets pass through p1 on housing 102,
P2, o, a, b, c, d mouth and extraneous UNICOM.Valve element 103, when limit on the right-right-hand limit position, connects in inside cavity between hydraulic fluid port p1, p2, oil
Mouth a, b, c, d and oil return opening o is blind end；When limit on the left position, hydraulic fluid port p1, p2 are blind end to valve element 103, hydraulic fluid port a,
Connect in inside cavity between b, c, d and oil return opening o.
Valve element 103 limit on the right-right-hand limit position is: valve element 103 is maintained at the convex shoulder of valve element 103 in the presence of back-moving spring bullet 104
It is stuck in the position on housing 102 cavity inner convex platform.
Valve element 103 limit on the left position is: valve element 103 overcomes the active force of back-moving spring 104 to move to housing 102 chamber to the left
The position that body left side is contacted with valve element 103 left side.
When manipulating bypass valve rocker arm body 101, along the direction with bypass valve core 103 diameter parallel, pulling force f1 to the right is little
When 150n, rotating torque produced by back-moving spring 104 is more than rotating torque produced by steering force, and valve element 103 is resetting
It is maintained at the limit on the right-right-hand limit position that the convex shoulder of valve element 103 is stuck on housing 102 cavity inner convex platform, now in the presence of spring bullet 104
Hydraulic fluid port p1, p2 of bypass valve links up, and hydraulic fluid port a, b, c, d and oil return opening o is turned off simultaneously, and this state allows the normal folding and unfolding of undercarriage
System controls undercarriage.
When manipulating bypass valve rocker arm body 101, along the direction with bypass valve core 103 diameter parallel, pulling force f1 to the right is big
When 200n, rocker arm body 101 rotates clockwise around fixed rotating shaft, and promotes valve element 103 to overcome the active force of back-moving spring 104
Move to the extreme position that housing 102 cavity left side is contacted with valve element 103 left side to the left, move from left to right in valve element
When, rocking arm end stroke is that during 4mm, p1, p2 mouth begins to shut off, and when rocking arm end stroke reaches 22mm, p1, p2 completely close,
Now the voltage supply hydraulic fluid port of hatch door control valve 4 and undercarriage control valve 7 and voltage supply oil circuit 2 disconnect, and when rocker arm body end, stroke is
During 23mm, when rocking arm end stroke reaches 41mm, actuator port a, b, c, d and oil return opening o start to link up, and now undercarriage is being just
The often folding and unfolding pipeline of folding and unfolding actuator 6 and the either on or off pipeline of hatch door normal folding and unfolding actuator 5 and oil return circuit 3 phase
Logical, thus completing the isolation of the normal extension and retraction system of undercarriage.After the isolation of undercarriage normal extension and retraction system, the normal folding and unfolding of undercarriage
Actuator 6 and hatch door normal folding and unfolding actuator 5 can be freely-movable, when undercarriage is met an urgent need and put, follow emergent laying mechanism
Servo-actuated.
Bypass valve rocker arm end initial 4mm and end 4mm(41～45mm) for idle stroke (although i.e. valve element motion,
It is that hydraulic fluid port is not changed), this design can prevent from causing bypass valve hydraulic fluid port to change due to the vibrations of aircraft.
Claims (4)
1. a kind of normal folding and unfolding shielding system of undercarriage, is characterized in that, including bypass valve (1), voltage supply oil circuit (2), oil return
Oil circuit (3), hatch door control valve (4), hatch door normal folding and unfolding actuator (5), undercarriage normal folding and unfolding actuator (6), rises and falls
Frame control valve (7) is it is characterised in that side is passed through in the voltage supply hydraulic fluid port parallel connection of hatch door control valve (4) and undercarriage control valve (7) simultaneously
The p2 mouth of port valve (1) is connected, and voltage supply oil circuit (2) is connected with the p1 mouth of bypass valve (1), the o of oil return circuit (3) and bypass valve (1)
Mouth is connected, the either on or off of the folding and unfolding pipeline of undercarriage normal folding and unfolding actuator (6) and hatch door normal folding and unfolding actuator (5)
Pipeline is connected with a, b, c, d mouth of bypass valve (1) respectively；
When bypass valve core (103) is in limit on the right-right-hand limit position, now hydraulic fluid port p1, p2 of bypass valve links up, simultaneously hydraulic fluid port a, b, c, d and
Oil return opening o is turned off, and this state allows the normal extension and retraction system of undercarriage to control undercarriage；
When bypass valve core (103) is in limit on the left position, p1, p2 completely close, and now hatch door control valve (4) and undercarriage control
The voltage supply hydraulic fluid port of valve (7) is disconnected with voltage supply oil circuit (2), and actuator port a, b, c, d and oil return opening o start to link up, now undercarriage
The normal folding and unfolding pipeline of folding and unfolding actuator (6) and the either on or off pipeline of hatch door normal folding and unfolding actuator (5) and oil return oil
Road (3) communicates, and undercarriage normal folding and unfolding actuator (6) and hatch door normal folding and unfolding actuator (5) can be freely-movable, rising
The frame that falls is met an urgent need when putting, and follows emergent laying mechanism servo-actuated.
2. the normal folding and unfolding shielding system of a kind of undercarriage as claimed in claim 1, is characterized in that, described undercarriage is just
Often folding and unfolding actuator (6) and hatch door normal folding and unfolding actuator are by hydraulically powered actuator.
3. the normal folding and unfolding shielding system of a kind of undercarriage as claimed in claim 1, is characterized in that, described bypass valve
(1) rocker arm body (101), housing (102), valve element (103) and back-moving spring (104), valve element (103) and back-moving spring are included
(104) it is arranged in the cavity of housing (102), back-moving spring (104) one end withstands on housing (102) cavity left side, another
End set withstands on valve element (103) left end convex shoulder, and valve element (103) right-hand member stretches out the cavity of housing (102), and passes through rocker arm body
(101) mounting hole of lower end is hinged with it, and rocker arm body (101) is also by rotating shaft and housing hinge；
The cavity cooperation of valve element (103) and housing (102) leaves 7 logical oil pockets, 7 logical oil pockets pass through p1 on housing (102),
P2, o, a, b, c, d mouth and extraneous UNICOM；Valve element (103), when limit on the right-right-hand limit position, connects in inside cavity between hydraulic fluid port p1, p2,
Hydraulic fluid port a, b, c, d and oil return opening o are blind end；When limit on the left position, hydraulic fluid port p1, p2 are blind end to valve element (103), oil
In inside cavity connection between mouth a, b, c, d and oil return opening o.
4. the normal folding and unfolding shielding system of a kind of undercarriage as claimed in claim 3, is characterized in that, described valve element
(103) limit on the right-right-hand limit position is: the convex shoulder that valve element (103) is maintained at valve element (103) in the presence of back-moving spring (104) is stuck in shell
Position on body (102) cavity inner convex platform；
Valve element (103) limit on the left position is: valve element (103) overcomes the active force of back-moving spring (104) to move to housing to the left
(102) position that cavity left side is contacted with valve element (103) left side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310607963.3A CN104648661B (en) | 2013-11-22 | 2013-11-22 | Normal releasing and retracting isolation system for plane undercarriage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310607963.3A CN104648661B (en) | 2013-11-22 | 2013-11-22 | Normal releasing and retracting isolation system for plane undercarriage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104648661A CN104648661A (en) | 2015-05-27 |
| CN104648661B true CN104648661B (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310607963.3A Active CN104648661B (en) | 2013-11-22 | 2013-11-22 | Normal releasing and retracting isolation system for plane undercarriage |
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| Country | Link |
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| CN (1) | CN104648661B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107697273A (en) * | 2017-09-12 | 2018-02-16 | 陕西飞机工业（集团）有限公司 | A kind of control system actively prevented undercarriage and fail to lay down Single Point of Faliure |
| CN112173085B (en) * | 2020-09-25 | 2023-03-28 | 中国直升机设计研究所 | Hydraulic control system and method for retraction and release of helicopter undercarriage |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6311927B1 (en) * | 2000-07-11 | 2001-11-06 | Lockheed Martin Corporation | Emergency landing gear extension system using pyrotechnic operated high pressure bottle |
| EP1495961A1 (en) * | 2003-07-08 | 2005-01-12 | Liebherr-Aerospace Lindenberg GmbH | Retractable undercarriage actuation system |
| CN201220749Y (en) * | 2008-05-28 | 2009-04-15 | 江西洪都航空工业集团有限责任公司 | Hydraulic control system for folding and unfolding undercarriage |
| CN201745747U (en) * | 2010-07-16 | 2011-02-16 | 中国航空工业集团公司西安飞机设计研究所 | Teletype turning system capable of preventing out of control of airplane |
| CN102460317A (en) * | 2009-05-29 | 2012-05-16 | 伊顿公司 | Control system for actuation system |
| CN202226056U (en) * | 2011-08-15 | 2012-05-23 | 中国航空工业集团公司西安飞机设计研究所 | Control system for front landing gear |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2469484B (en) * | 2009-04-15 | 2013-09-18 | Ge Aviat Systems Ltd | Landing gear actuation control system |
-
2013
- 2013-11-22 CN CN201310607963.3A patent/CN104648661B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6311927B1 (en) * | 2000-07-11 | 2001-11-06 | Lockheed Martin Corporation | Emergency landing gear extension system using pyrotechnic operated high pressure bottle |
| EP1495961A1 (en) * | 2003-07-08 | 2005-01-12 | Liebherr-Aerospace Lindenberg GmbH | Retractable undercarriage actuation system |
| CN201220749Y (en) * | 2008-05-28 | 2009-04-15 | 江西洪都航空工业集团有限责任公司 | Hydraulic control system for folding and unfolding undercarriage |
| CN102460317A (en) * | 2009-05-29 | 2012-05-16 | 伊顿公司 | Control system for actuation system |
| CN201745747U (en) * | 2010-07-16 | 2011-02-16 | 中国航空工业集团公司西安飞机设计研究所 | Teletype turning system capable of preventing out of control of airplane |
| CN202226056U (en) * | 2011-08-15 | 2012-05-23 | 中国航空工业集团公司西安飞机设计研究所 | Control system for front landing gear |
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| Publication number | Publication date |
|---|---|
| CN104648661A (en) | 2015-05-27 |
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