CN209051583U - A kind of emergency brake system can be realized long-range control - Google Patents
A kind of emergency brake system can be realized long-range control Download PDFInfo
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- CN209051583U CN209051583U CN201821656029.5U CN201821656029U CN209051583U CN 209051583 U CN209051583 U CN 209051583U CN 201821656029 U CN201821656029 U CN 201821656029U CN 209051583 U CN209051583 U CN 209051583U
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Abstract
A kind of emergency brake system can be realized long-range control directly controls the solenoid hydraulic lock being mounted in main landing gear compartment and Electric hydraulic pressure servo valve by the brake instruction transducer being mounted in cockpit, to realize emergency brake system long-range control.The solenoid hydraulic lock and Electric hydraulic pressure servo valve being mounted in main landing gear compartment are connected to hydraulic power source nearby, brake system fluid pressure line is arranged in main landing gear compartment close to brake machine wheel, solve the problems, such as that fluid pressure line must be into cockpit, to reduce the length of fluid pressure line, keep emergency brake system maintenance simple, reduces the complexity and maintenance difficulties of emergency brake system.
Description
Technical field
The present invention relates to airplane brake system field, the emergency brake system of specifically a kind of long-range control and its design side
Method.
Background technique
Digital FBW anti-skid brake system (ABS) is widely used in existing airplane brake system, and airplane brake system is by normal braking system
System and emergency brake system composition.Normal braking system has antiskid function；Emergency brake system is by brake reducing valve 1, oil
Case 2, hydraulic power source 3, foot pedal 5 form, and emergency brake is realized by the hand brake, no antiskid function.It is specifically shown in Fig. 1 prior art emergency
Brake system schematic diagram.
The reducing valve 1 that brakes is articulated and connected with foot pedal 5, is mounted in main driving cabin；Since emergency brake system uses
Mechanical brake reducing valve, brake system fluid pressure line is from aircraft cockpit until the brake gear of brake machine wheel 4.It is existing
There is the hydraulic oil of technology emergency brake system to have to enter into main driving cabin, causes fluid pressure line length, brake system weight big, directly
The problems such as causing emergency brake system system maintenance complicated.The present invention proposes a kind of emergency brake system of long-range control and its sets
Meter method solves all problems existing for prior art emergency brake system.
A kind of aircraft fax of brake instruction direct controlled type is disclosed in the innovation and creation of Publication No. CN106394525A
Brake system, the innovation and creation include brake instruction transducer, brake control valve, brake-control box and velocity sensor；By stopping
The brake instruction signal that vehicle instruction sensor issues is without brake-control box, and go directly brake control valve, directly manipulation brake control
The aircraft brake-by-wire control system that valve processed brakes.The brake instruction signal of brake instruction transducer output is directly fed to stop
Vehicle control valve, that is, electrohydraulic servo valve, electrohydraulic servo valve export the water brake pressure directly proportional to brake instruction signal and brake
Control.When brake machine wheel skids or is locked, issued and brake instruction current direction phase from brake-control box to brake control valve
Anti- anti-sliding control current signal, to reduce brake pressure, releases wheel and skids to reduce the control electric current of brake control valve
Or it is locked, avoid quick-fried tire of stopping.
But the aircraft fax that a kind of brake instruction of the innovation and creation of Publication No. CN106394525A proposition is directly controlled is stopped
Vehicle system is a kind of aircraft normal braking system, and the aircraft brake-by-wire system which directly controls has brake function, prevents
Sliding function, brake function are realized by instruction sensor, brake control valve；Antiskid function is by brake-control box, velocity sensor
It is realized jointly with brake control valve.But the aircraft brake-by-wire system as emergency brake system when, there are emergency brake liquid
The problem that pressure pipe road is long, system weight is big and system complex bring maintenance difficulties are big.
Summary of the invention
To overcome, emergency brake fluid pressure line existing in the prior art is long, system weight is big and system complex is brought
The big problem of maintenance difficulties, the invention proposes a kind of emergency brake systems that can be realized long-range control.
The present invention includes brake instruction transducer, solenoid hydraulic lock, Electric hydraulic pressure servo valve, fuse, brake instruction biography
Sensor, power supply, landing gear position switch.Wherein: the actuator port of the Electric hydraulic pressure servo valve and the brake fluid of brake machine wheel
Entrance connection, the oil outlet of the Electric hydraulic pressure servo valve are connected to the oil return line of fuel tank；The oil inlet of the Electric hydraulic pressure servo valve
Mouth is connected to the oil outlet of solenoid hydraulic lock；The oil inlet of the solenoid hydraulic lock is connected to the oil outlet of hydraulic power source, oil return opening
It is connect with the oil return pipe of fuel tank, the oil inlet connection of the actuator port and Electric hydraulic pressure servo valve.
The control signal input of Electric hydraulic pressure servo valve and the Electric hydraulic pressure servo valve control of brake instruction transducer refer to
Output end is enabled to be connected to.The control signal input of the solenoid hydraulic lock and the electromagnetic hydraulic pressure lock control of brake instruction transducer are believed
The connection of number output end.The DC power supply is connected through fuse with one end that landing gear position switchs, landing gear position switch
The other end and brake instruction transducer power input connect.The brake instruction transducer is connect with brake lever.
When the mechanical trip of the brake instruction transducer is within the scope of idle stroke, the electromagnetic hydraulic pressure of brake instruction transducer
Lock control signal is 0V；When brake instruction transducer mechanical trip in the idle stroke not less than brake instruction transducer and is not more than
When the total kilometres of the brake instruction transducer, the electromagnetic hydraulic pressure lock control signal of brake instruction transducer is the DC voltage of 28V.
Emergency brake system brake instruction transducer machinery idle stroke is 2+0.5Mm, total kilometres areElectro-hydraulic pressure
Force servo valve quiescent current isMaximum controlling current isControlling current range is The Electric hydraulic pressure servo valve control instruction electric current and stroke gain K of brake instruction transducer1=0.4444mA/mm.
When brake instruction transducer mechanical trip is in 0mm~2+0.5Within the scope of mm, electric current is controlledWhen brake refers to
Sensor mechanism stroke is enabled to existIn range, electric current is controlledBrake
Instruction sensor electric current/stroke gain K1=0.4444mA/mm.
The specified charge oil pressure 21MPa of emergency brake system, flow system flow are not less than 15L/min, and return pressure is not more than
1.2MPa；Rated operational current isDead zone electric currentElectric hydraulic pressure servo valve exports brake pressure and control electricity
Flow IFIt is directly proportional, Electric hydraulic pressure servo valve pressure/current gain K2=0.6167MPa/mA.
The present invention directly controls the electricity being mounted in main landing gear compartment by the brake instruction transducer being mounted in cockpit
Magnetic hydraulic lock and Electric hydraulic pressure servo valve, to realize emergency brake system long-range control.It is mounted in main landing gear compartment
Solenoid hydraulic lock and Electric hydraulic pressure servo valve are connected to hydraulic power source nearby, and brake system fluid pressure line is arranged in close to brake machine wheel
In main landing gear compartment, solve the problems, such as that fluid pressure line, to reduce the length of fluid pressure line, must make to meet an urgent need into cockpit
Brake system maintenance is simple.
Brake instruction transducer connects landing gear position switch, when brake instruction transducer mechanical trip is in idle stroke range
When interior, it is 0V that the solenoid hydraulic lock of brake instruction transducer, which shuts control signal, and solenoid hydraulic lock closes emergency brake system liquid
The fuel feeding of potential source；The Electric hydraulic pressure servo valve control instruction of brake instruction transducer is static cost control electric current IF0, electro-hydraulic pressure watches
The brake pressure for taking valve output is anti-skid brake system (ABS) return pressure.
Landing gear position switch is connected, when brake instruction transducer mechanical trip is not less than idle stroke and no more than head office
When in range, the solenoid hydraulic lock of brake instruction transducer unlocks control signal as 28V.DC, and solenoid hydraulic lock opening answers emergency brake
The fuel feeding of vehicle system hydraulic power source；The Electric hydraulic pressure servo valve control instruction of brake instruction transducer is control electric current IF, electro-hydraulic pressure
The control electric current I of force servo valve output and brake instruction transducerFDirectly proportional brake pressure；Brake instruction transducer stroke is got over
Greatly, output control electric current IFBigger, Electric hydraulic pressure servo valve output brake pressure is higher, and brake instruction transducer mechanical trip reaches
Electric hydraulic pressure servo valve exports emergency brake system maximum brake pressure when to total kilometres.
Brake instruction transducer of the invention is mounted in cockpit, and solenoid hydraulic lock and Electric hydraulic pressure servo valve are mounted on
In main landing gear compartment, solenoid hydraulic lock and Electric hydraulic pressure servo valve are connected to hydraulic power source nearby, and brake system fluid pressure line is close
Brake machine wheel is arranged in main landing gear compartment, to reduce the length of emergency brake system fluid pressure line, reduces brake system
The weight of system, the present invention directly control solenoid hydraulic lock and Electric hydraulic pressure servo valve by brake instruction transducer at a distance, from
And realize emergency brake system long-range control.Reduce the complexity and maintenance difficulties of emergency brake system.
With in the prior art, reducing valve
Brake instruction transducer is in together with solenoid hydraulic lock and Electric hydraulic pressure servo valve
Detailed description of the invention
The structural schematic diagram of Fig. 1 prior art；
Structural schematic diagram Fig. 2 of the invention.
1. brake reducing valve；2. fuel tank；3. hydraulic power source；4. brake machine wheel；5. foot pedal；6. brake lever；7. brake
Instruction sensor；8. Electric hydraulic pressure servo valve；9. solenoid hydraulic lock；10. landing gear position switchs；11. fuse；12.28VDC
Power supply.
Specific embodiment
The present embodiment is a kind of emergency brake system of long-range control, including brake instruction transducer 7, solenoid hydraulic lock 9,
Electric hydraulic pressure servo valve 8, fuse 11, brake instruction transducer 7, power supply 12, landing gear position switch 10；The brake instruction
Sensor is mounted in cockpit, and solenoid hydraulic lock and Electric hydraulic pressure servo valve are mounted in main landing gear compartment.Wherein: the electricity
The actuator port of hydraulic coupling servo valve 8 is connect with the brake oil-in of brake machine wheel 4, the oil outlet of the Electric hydraulic pressure servo valve with
The oil return line of fuel tank 2 is connected to；The oil inlet of the Electric hydraulic pressure servo valve 8 is connected to the oil outlet of solenoid hydraulic lock 9；Electro-hydraulic pressure
The control signal input of force servo valve 8 is connected to the Electric hydraulic pressure servo valve control instruction output end of brake instruction transducer 7.
There are three hydraulic ports for the solenoid hydraulic lock 9, are oil inlet, oil return opening and actuator port, oil inlet therein respectively
Mouth is connected to the oil outlet of hydraulic power source 3, and oil return opening is connect with the oil return pipe of fuel tank 2, and the actuator port is watched with electro-hydraulic pressure
Take the oil inlet connection of valve 8.
The control signal input of the solenoid hydraulic lock 9 and the electromagnetic hydraulic pressure lock control signal of brake instruction transducer 7
Output end connection.
The DC power supply 12 of 28V is connected through fuse 11 with one end of landing gear position switch 10, which opens
The other end of pass 10 is connect with the power input of brake instruction transducer 7.The brake instruction transducer 7 and brake lever 6
Connection.
The design process of the emergency brake system for the long-range control that the present embodiment proposes is:
Step 1: determining the control logic of brake instruction transducer.
I, which determines that the solenoid hydraulic lock of brake instruction transducer output is unlocked, controls the voltage of signal:
When the mechanical trip of brake instruction transducer 7 is within the scope of idle stroke, the electromagnetic hydraulic pressure of brake instruction transducer 7
Lock control signal is 0V；When brake instruction transducer mechanical trip in the idle stroke not less than brake instruction transducer and is not more than
When the total kilometres of the brake instruction transducer, the electromagnetic hydraulic pressure lock control signal of brake instruction transducer 7 is the direct current of 28V
Pressure.
II determines the control logic of brake instruction transducer
When the electromagnetic hydraulic pressure lock control signal of brake instruction transducer 7 is 0V, solenoid hydraulic lock is shut, and emergency brake is answered in cutting
Vehicle system hydraulic power source；When the electromagnetic hydraulic pressure lock control signal of brake instruction transducer 7 is 28V, solenoid hydraulic lock is unlocked, emergency
Brake system hydraulic power source fuel feeding.
Emergency brake system brake instruction transducer solenoid hydraulic lock control logic is determined by formula (1):
In formula: S is brake instruction transducer control signal condition；1 is solenoid hydraulic lock unlocking control signal, the control
Signal is the DC voltage of 28V；0 is that solenoid hydraulic lock shuts control signal, which is the DC voltage of 0V；LsIt is to stop
Vehicle instruction sensor impulse stroke；Ls0It is brake instruction transducer idle stroke.
In the present embodiment, emergency brake system brake instruction transducer machinery idle stroke is set as 2+0.5Mm, total kilometres areOperating voltage is the DC voltage of 28V.Solenoid hydraulic lock shuts the DC voltage that control signal is 0V；Electromagnetic liquid
Pressure lock, which is unlocked, controls signal as the DC voltage of 28V.
Step 2, the Electric hydraulic pressure servo valve control instruction current logic of brake instruction transducer is determined.
When the mechanical trip of brake instruction transducer 7 is within the scope of idle stroke, the electro-hydraulic pressure of brake instruction transducer 7
Servo valve control instruction current is static cost control electric current IF0, emergency brake system Electric hydraulic pressure servo valve 8 export brake pressure be
Anti-skid brake system (ABS) return pressure；When 7 mechanical trip of brake instruction transducer not less than brake instruction transducer idle stroke and
When no more than the brake instruction transducer total kilometres, the Electric hydraulic pressure servo valve control instruction electric current of brake instruction transducer 7 is
IF, the output control of brake instruction transducer 7 electric current IFIt is directly proportional to brake instruction transducer mechanical trip, emergency brake system electricity
It is directly proportional to control electric current that hydraulic coupling servo valve 8 exports brake pressure.Emergency brake system brake instruction is determined by formula (2)
Sensor Electric hydraulic pressure servo valve control instruction electric current:
In formula: IFIt is control electric current；IF0It is static cost control electric current；K1It is electric current/stroke gain；LsIt is that brake instruction passes
Sense device working stroke；Ls0It is brake instruction transducer idle stroke.
In the present embodiment, emergency brake system brake instruction transducer machinery idle stroke is set as 2+0.5Mm, total kilometres areElectric hydraulic pressure servo valve quiescent current isMaximum controlling current isControl current range
ForThe Electric hydraulic pressure servo valve control instruction electric current and stroke gain K of brake instruction transducer1=
0.4444mA/mm.When brake instruction transducer mechanical trip is in 0mm~2+0.5Within the scope of mm, electric current is controlledWork as brake
Vehicle instruction sensor mechanical trip existsIn range, electric current is controlled
Brake instruction transducer electric current/stroke gain K1=0.4444mA/mm.The Electric hydraulic pressure servo valve of brake instruction transducer controls
Instruction current size is directly proportional to brake instruction transducer impulse stroke, and the bigger output electric current of brake instruction transducer stroke is more
Greatly, it is exported when total kilometresMaximum brake electric current.
Step 3: determining the control parameter of solenoid hydraulic lock.
Solenoid hydraulic lock is common two-bit triplet solenoid valve, is integrated in an oil piping system with Electric hydraulic pressure servo valve
In.When work, which is shut, and emergency brake system cutting hydraulic power source 13 simultaneously releases stress；Electromagnetic liquid
It presses locking wire circle to be powered to unlock, emergency brake system and 13 connection of hydraulic power source, brake system export brake pressure.
Solenoid hydraulic lock coil blackout is shut, and emergency brake system cuts off hydraulic power source fuel feeding, supplies Electric hydraulic pressure servo valve
Oil pressure is 0MPa or is return pressure.Solenoid hydraulic lock coil, which is powered, unlocks, and emergency brake system hydraulic power source connects fuel feeding, makes
Electric hydraulic pressure servo valve charge oil pressure is
The present embodiment set the specified charge oil pressure of emergency brake system asFlow system flow is not less than 15L/min,
The return pressure of emergency brake system is not more than 1.2MPa, solenoid hydraulic lock rated operational voltage 28V.DC, minimum
Not less than 16V.DC, maximum operating voltage 30V.DC.
Step 4: determining Electric hydraulic pressure servo valve control parameter
The Electric hydraulic pressure servo valve of the present embodiment selection pressure Linear Control.The brake pressure of Electric hydraulic pressure servo valve output
Power is determined by the electric current that brake instruction transducer exports；The electric current that brake instruction transducer 7 exports is by 7 machine of brake instruction transducer
Tool stroke determines: when 7 mechanical trip of brake instruction transducer is within the scope of idle stroke, the output brake of Electric hydraulic pressure servo valve 8
Pressure is anti-skid brake system (ABS) return pressure P0；When 7 mechanical trip of brake instruction transducer is being not less than idle stroke and is being not more than
When within the scope of total kilometres, Electric hydraulic pressure servo valve exports brake pressure and control electric current IFIt is directly proportional.It is determined and is stopped by formula (3)
Vehicle pressure P.
P=K2(IF-IF0)+P0 (3)
In formula: K2Pressure/current gain；P0Anti-skid brake system (ABS) return pressure；P brake pressure.
In the present embodiment, the specified charge oil pressure 21MPa of emergency brake system is set, flow system flow is not less than 15L/min, returns
Oil pressure is not more than 1.2MPa, it is desirable that Electric hydraulic pressure servo valve energy long-term work under 8 grades of oil liquid environment of GJB420B, it is specified defeated
Pressure outRated operational currentDead zone electric currentElectric hydraulic pressure servo valve export brake pressure with
Control electric current IFIt is directly proportional, Electric hydraulic pressure servo valve pressure/current gain K2=0.6167MPa/mA.
So far, the design of the emergency brake system of long-range control is completed.
Claims (2)
1. a kind of emergency brake system that can be realized long-range control, which is characterized in that including brake instruction transducer, electromagnetic liquid
Press lock, Electric hydraulic pressure servo valve, fuse, brake instruction transducer, power supply, landing gear position switch；Wherein: the electro-hydraulic pressure
The brake oil-in of the actuator port of force servo valve and brake machine wheel connects, the oil outlet of the Electric hydraulic pressure servo valve and fuel tank
Oil return line connection；The oil inlet of the Electric hydraulic pressure servo valve is connected to the oil outlet of solenoid hydraulic lock；The solenoid hydraulic lock
Oil inlet be connected to the oil outlet of hydraulic power source, the connection of the oil return pipe of oil return opening and fuel tank, the actuator port and electro-hydraulic pressure
The oil inlet of force servo valve connects；
The control signal input of Electric hydraulic pressure servo valve and the Electric hydraulic pressure servo valve control instruction of brake instruction transducer are defeated
Outlet connection；The control signal input of the solenoid hydraulic lock and the electromagnetic hydraulic pressure lock control signal of brake instruction transducer are defeated
Outlet connection；DC power supply is connected through fuse with one end that landing gear position switchs, the other end of landing gear position switch
It is connect with the power input of brake instruction transducer；The brake instruction transducer is connect with brake lever.
2. can be realized the emergency brake system of long-range control as described in claim 1, which is characterized in that the brake instruction passes
When the mechanical trip of sensor is within the scope of idle stroke, the electromagnetic hydraulic pressure lock control signal of brake instruction transducer is 0V；Work as brake
Instruction sensor mechanical trip is in the idle stroke not less than brake instruction transducer and is not more than the total of the brake instruction transducer
When stroke, the electromagnetic hydraulic pressure lock control signal of brake instruction transducer is the DC voltage of 28V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821656029.5U CN209051583U (en) | 2018-10-12 | 2018-10-12 | A kind of emergency brake system can be realized long-range control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821656029.5U CN209051583U (en) | 2018-10-12 | 2018-10-12 | A kind of emergency brake system can be realized long-range control |
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| Publication Number | Publication Date |
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| CN209051583U true CN209051583U (en) | 2019-07-02 |
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| CN201821656029.5U Active CN209051583U (en) | 2018-10-12 | 2018-10-12 | A kind of emergency brake system can be realized long-range control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117360769A (en) * | 2023-10-12 | 2024-01-09 | 贵州新安航空机械有限责任公司 | Helicopter brake pressure control system and control method |
-
2018
- 2018-10-12 CN CN201821656029.5U patent/CN209051583U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117360769A (en) * | 2023-10-12 | 2024-01-09 | 贵州新安航空机械有限责任公司 | Helicopter brake pressure control system and control method |
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