EP2283238A2 - Procede de controle de l'etat d'un accumulateur a reserve d'energie, notamment pour aeronef - Google Patents
Procede de controle de l'etat d'un accumulateur a reserve d'energie, notamment pour aeronefInfo
- Publication number
- EP2283238A2 EP2283238A2 EP09738332A EP09738332A EP2283238A2 EP 2283238 A2 EP2283238 A2 EP 2283238A2 EP 09738332 A EP09738332 A EP 09738332A EP 09738332 A EP09738332 A EP 09738332A EP 2283238 A2 EP2283238 A2 EP 2283238A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- accumulator
- predetermined
- duration
- predetermined pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 title claims abstract description 8
- 239000012530 fluid Substances 0.000 claims abstract description 72
- 238000005259 measurement Methods 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 12
- 238000004146 energy storage Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/022—Installations or systems with accumulators used as an emergency power source, e.g. in case of pump failure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
Definitions
- the present invention relates to a method for monitoring the state of an energy reserve accumulator connected to a fluid system.
- the planes are generally equipped with several hydraulic circuits, allowing the actuation of all servitudes of the aircraft.
- each device controlled by a hydraulic circuit is mounted on both a main hydraulic circuit and an auxiliary hydraulic circuit, independent and autonomous, for security reasons.
- This energy reserve accumulator is placed on the high pressure hydraulic line of the fluid system, between a hydraulic power generator and the controlled elements, remote from this power generator. Such an accumulator makes it possible to absorb the overpressures generated in the hydraulic circuit by the operation of the various elements controlled and thus to prevent the structure and equipment of the aircraft from being damaged during sudden pressure variation in the pipes.
- the document FR 2 888 898 proposes a method for checking the pressurization state of an energy accumulator.
- this control method comprises, after pressurizing the fluid system at an operating pressure, to measure the time interval required for the fluid system to change from a first predetermined pressure to a second predetermined pressure and to a second predetermined pressure. compare this time interval to a predetermined reference duration.
- This reference period is determined by implementing the control method on a reference accumulator.
- the time taken by the system to go from a first predetermined pressure to a second predetermined pressure can be significant because of the configuration. of the hydraulic system itself, and thus not be directly representative of the operating state of the energy accumulator.
- the object of the present invention is to solve the aforementioned drawbacks and to propose a method for controlling the state of an energy-efficient accumulator, making it possible to check the operation of an energy accumulator independently of the configuration of the system. hydraulic system on which is mounted this energy accumulator.
- the present invention relates to a method for controlling the state of an energy reserve accumulator, the accumulator being connected to a fluid system, characterized in that it comprises the following successive steps: pressurizing the fluid system;
- the difference between the first predetermined pressure and the second predetermined pressure is substantially equal to the difference between the third predetermined pressure and the fourth predetermined pressure.
- the second predetermined pressure is greater than the precharge pressure of the accumulator at a temperature substantially equal to 60 ° C.
- the third predetermined pressure is less than the precharging pressure of the accumulator at a temperature substantially equal to -40 ° C.
- the predetermined pressures used to control the operating state of the energy accumulator take into account the pressure of precharging the accumulator, the accumulator being able to supply energy to the fluid system as long as the pressure of the fluid system is greater than the precharge pressure.
- a device for monitoring the state of an energy reserve battery the accumulator being connected to a high pressure line of a fluid system and the system of fluid comprising at least one pressurization pump of the system, characterized in that it comprises:
- a real-time processing unit at least one pressure detector for measuring the pressure of the fluid in the high-pressure line, the detector transmitting to the processing unit a measurement signal representative of the pressure measured by the detector; and in that the processing unit comprises electronic means for measuring a first time separating a measurement of a first predetermined pressure and a measurement of a second predetermined pressure emitted by the pressure detector, and a second duration separating a measurement a third predetermined pressure and a measurement of a fourth predetermined pressure emitted by the pressure detector, and means for comparing the first duration and the second duration to determine the state of the energy reserve accumulator .
- the present invention relates to an aircraft comprising at least one energy reserve accumulator connected to a high pressure line of a fluid system, characterized in that it comprises means adapted to implement the method according to the invention. 'invention.
- FIG. 1 is a schematic representation of a device for monitoring the state of an energy reserve battery according to one embodiment of the invention.
- FIG. 2 is a curve illustrating the implementation of the method for monitoring the state of a storage battery with an energy reserve according to one embodiment of the invention.
- FIG. 1 shows a device for controlling the state of an energy reserve battery according to one embodiment of the invention.
- the energy reserve accumulator is connected to the fluid system.
- the hydraulic circuit is adapted to control the maneuvering of a rudder 1 of an aircraft.
- Each fluid system comprises its own fluid reservoir 2 connected to a closed fluid distribution circuit 3, which comprises an HP high pressure line and a low pressure BP line for the return of the low pressure fluid to the reservoir 2.
- the fluid used is an incompressible liquid for an aircraft but any other liquid or air can be implemented for applications other than aeronautics (land or naval).
- the fluid distribution circuit is connected to a hydraulic cylinder 4.
- a distribution circuit 3 comprises rigid pipes and possibly flexible pipes for mobile connections (brakes, landing gear, etc.).
- the hydraulic power generation is ensured, for example, by a variable displacement piston pump 5.
- a control signal is sent to a computer 7 which controls a selector 8.
- a face of the jack 4 receives the hydraulic pressure in an inlet chamber 9 causing a movement of the cylinder (to the right in Figure 1).
- the rudder 1 then moves down.
- the outlet chamber 10 of this cylinder being connected back to the reservoir 2, the fluid present in this chamber 10 is sent to the reservoir 2.
- a transmitter 11 sends a status signal from the rudder 1 to the computer 7 for display 12
- the selector 8 can send the fluid under high pressure to the chamber 9 or to the chamber 10 according to the desired direction of movement of the rudder 1, downwards or upwards.
- an energy reserve accumulator 13 which is adapted to restore its energy reserve to the consumer (s) 4 in order to maintain the pressure at a level close to the nominal operating pressure.
- This energy reserve accumulator 13 is placed on the HP high-pressure hydraulic line between the hydraulic power generator 5 and the consumers 4 furthest away from this power generator 5.
- This accumulator 13 also makes it possible to absorb the overpressures generated in the hydraulic circuit by the operation of the consumers 4. This prevents the structure and equipment of the aircraft from being damaged during sudden pressure variation in the pipes.
- Each fluid system comprises at least one energy storage accumulator 13, their number being a function of the demands of the fluid servitudes at nominal pressure.
- the device of the invention described below in the context of the control of the state of an accumulator connected to a fluid system is adaptable by those skilled in the art to control all the accumulators of a fluid system.
- the energy reserve accumulator 13 is here a membrane accumulator, that is to say having an elastic wall delimiting the internal volume of this accumulator in two cavities 14, 15.
- this accumulator can be a hydraulic accumulator with metal bellows. The proper functioning of this energy reserve battery is guaranteed only when the battery is properly pressurized, it is necessary to regularly check the state of the accumulator 13.
- the device comprises a pressure sensor 16 for measuring the pressure of the fluid in the HP high pressure line of this fluid system.
- This pressure detector 16 is mounted on the distribution circuit 3 on the same HP high-pressure line where is placed the energy reserve battery 13 to be tested. It transmits a measurement signal representative of the pressure measured by the detector to a real-time processing unit 17.
- This pressure detector 16 advantageously makes it possible to measure pressures up to 420 bar with an accuracy on the measurement of less than +/- 2.5 bar.
- the pressure detector 16 must have a measurement acquisition speed very fast to be able to respond to discharge times well below the second.
- the real-time processing unit 17 is, for example, an on-board computer. It comprises electronic means 18 for measuring the time interval ⁇ t separating two predetermined pressure measurements by the pressure detector 16. It further comprises means 19 for comparing time intervals ⁇ t between them. These means are implemented by software means which are known to those skilled in the art and will not be described here.
- the control of the state of an accumulator 13 may be performed in masked time each time the pump nominally pressurizes the fluid system in a stabilized manner and then stops. This control can thus be performed for example after a maintenance operation by maintaining the power generation time required for the test.
- the secondary power generation must be able to cut itself instantly. It is thus possible to use, for example, a hydraulic pump with an electric power source.
- the processing unit then preprogrammed the state monitoring method of an accumulator as described below.
- the real-time processing unit 17 can send a status signal from the energy reserve accumulator 13 to display means indicating to the operator whether a maintenance operation is to be performed on this accumulator 13.
- This fluid system is first pressurized. For this, at least one pressurization pump 5 is used as described above.
- This fluid is maintained at an operating pressure PF, for example 210 bars, for at least one duration ⁇ so as to ensure the stabilization of the fluid system. Stabilization of the system is achieved when no more pressure variation is observed in the fluid system.
- the pressurization of the fluid system is then stopped and the pressure drop of the system is monitored.
- the gas pressure in the second cavity of the energy reserve accumulator 13 is then deduced from the analysis of the pressure discharge time ⁇ t of the fluid system.
- control method consists of measuring a first duration ⁇ ti put by the fluid system to go from a first pressure P1 to a second pressure P2, lower than the first pressure P1 and a second duration At 2 set by the fluid system to move from a third pressure P3, lower than the second pressure P2, to a fourth pressure P4, itself lower than the third pressure P3.
- first and second pressures are greater than a precharge pressure Pp of the accumulator 13 while the third and fourth pressures are lower than the precharging pressure of the accumulator 13.
- This precharge pressure Pp corresponds to the pressure of gas in the second cavity 15 of the energy reserve accumulator 13 in its new state, that is to say corresponds to the pressure as specified at the factory outlet.
- this precharge pressure Pp is typically 133 bars at 20 ° C. for a nitrogen-type gas.
- the accumulator 13 can supply energy to the fluid system as long as the pressure of the fluid system is greater than the precharge pressure.
- this precharge pressure Pp depends on the temperature at which the accumulator 13 is located.
- the method of checking the condition of an accumulator should be implemented outside extreme temperatures, of the type -40 0 C or +60 0 C.
- the second predetermined pressure P2 must be greater than the precharging pressure of the accumulator 13 at a temperature substantially equal to 60 ° C: P2> P P + 6 o ° c- Similarly, the third predetermined pressure P3 is less than the pre-charge pressure of the accumulator at a temperature substantially equal to -40 0 C: P3 ⁇ Pp -40 -C
- the first predetermined pressure P1 must be greater than the second predetermined pressure P2 while remaining lower than the operating pressure P F of the fluid system.
- the accumulator restores the hydraulic energy to the fluid system between the first pressure P1 and the second pressure P2.
- the processing unit 17 indicates to the operator the operational state or not of the accumulator, so as to possibly cause a maintenance intervention when the accumulator 13 is no longer operational.
- the typical values of predetermined pressures used in the method of checking the state of an accumulator can be as follows:
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0852826A FR2930605B1 (fr) | 2008-04-25 | 2008-04-25 | Procede de controle de l'etat d'un accumulateur a reserve d'energie, notamment pour aeronef. |
| PCT/FR2009/000419 WO2009133298A2 (fr) | 2008-04-25 | 2009-04-10 | Procede de controle de l'etat d'un accumulateur a reserve d'energie, notamment pour aeronef |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2283238A2 true EP2283238A2 (fr) | 2011-02-16 |
| EP2283238B1 EP2283238B1 (fr) | 2014-08-13 |
Family
ID=40084325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09738332.7A Not-in-force EP2283238B1 (fr) | 2008-04-25 | 2009-04-10 | Procede de controle de l'etat d'un accumulateur a reserve d'energie, notamment pour aeronef |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8494789B2 (fr) |
| EP (1) | EP2283238B1 (fr) |
| CN (1) | CN102016331B (fr) |
| FR (1) | FR2930605B1 (fr) |
| WO (1) | WO2009133298A2 (fr) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8833143B2 (en) | 2012-03-22 | 2014-09-16 | Caterpillar Inc. | Hydraulic accumulator pre-charge pressure detection |
| US9366269B2 (en) | 2012-03-22 | 2016-06-14 | Caterpillar Inc. | Hydraulic accumulator health diagnosis |
| US8661875B2 (en) | 2012-05-07 | 2014-03-04 | Caterpillar Inc. | System and method to detect accumulator loss of precharge |
| US9533667B2 (en) | 2014-02-06 | 2017-01-03 | Goodrich Corporation | System and method of determining accumulator status |
| EP2908024B1 (fr) * | 2014-02-17 | 2023-09-06 | Special Springs S.r.l. | Appareil destiné à la pressurisation contrôlée d'actionneurs de cylindre à gaz |
| EP2924231A1 (fr) * | 2014-03-28 | 2015-09-30 | Siemens Aktiengesellschaft | Système de compensation de pression |
| GB2528321A (en) * | 2014-07-18 | 2016-01-20 | Airbus Operations Ltd | Determining integrity of braking control system |
| GB2528322B (en) * | 2014-07-18 | 2020-08-05 | Airbus Operations Ltd | Determining integrity of braking control system |
| EP3311033A4 (fr) * | 2015-06-18 | 2019-03-13 | Sikorsky Aircraft Corporation | Systèmes et procédés pour entretenir des accumulateurs hydrauliques |
| US10210676B2 (en) | 2016-06-29 | 2019-02-19 | Caterpillar Inc. | Systems, apparatuses, and methods for monitoring pressure in a hydraulic system |
| DE102016214375B3 (de) * | 2016-08-03 | 2017-11-16 | Audi Ag | Hydrauliksystem für ein Automatikgetriebe eines Kraftfahrzeugs |
| US10723337B2 (en) * | 2017-10-05 | 2020-07-28 | Goodrich Corporation | Brake control system channel protection |
| US11536262B2 (en) * | 2018-07-26 | 2022-12-27 | Amtrol Licensing Inc. | Automatic system profiling for a well system |
| CN113217503A (zh) * | 2021-05-27 | 2021-08-06 | 中冶赛迪技术研究中心有限公司 | 一种液压系统蓄能器状态检测系统 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2245038B (en) * | 1990-06-07 | 1994-03-23 | Toyota Motor Co Ltd | Device for detecting accumulator fluid leakage through control valve and restoring proper valve seating |
| JP3390949B2 (ja) * | 1993-07-21 | 2003-03-31 | 株式会社ボッシュオートモーティブシステム | 液圧ブレーキ倍力装置の警告装置 |
| JPH10230539A (ja) * | 1997-02-19 | 1998-09-02 | Mitsubishi Heavy Ind Ltd | 比例電磁制御弁の作動特性測定方法,油圧シリンダの作動制御方法および比例電磁制御弁の作動特性修正方法 |
| JPH1134860A (ja) * | 1997-07-23 | 1999-02-09 | Jidosha Kiki Co Ltd | 液圧ブレーキ倍力システムの異常検出装置および安全装置 |
| JP4064016B2 (ja) * | 1999-09-13 | 2008-03-19 | 本田技研工業株式会社 | 内燃機関の始動制御装置 |
| JP3513096B2 (ja) * | 2000-09-25 | 2004-03-31 | トヨタ自動車株式会社 | アキュムレータおよびアキュムレータの異常検出装置 |
| JP4710159B2 (ja) * | 2001-04-09 | 2011-06-29 | 株式会社アドヴィックス | 加圧流体用ベローズ式アキュームレータの異常検出装置 |
| JP3807270B2 (ja) * | 2001-08-31 | 2006-08-09 | 株式会社デンソー | 蓄圧式燃料噴射装置 |
| DE102004043589B4 (de) * | 2004-09-09 | 2018-11-15 | Zf Friedrichshafen Ag | Vorrichtung und Verfahren zur Bestimmung der Antriebsleistungsverteilung in einem Hybrid-Antriebsstrang eines Fahrzeuges |
| FR2888898B1 (fr) * | 2005-07-25 | 2010-09-10 | Airbus France | Dispositif et procede pour controler l'etat d'un accumulateur d'energie |
-
2008
- 2008-04-25 FR FR0852826A patent/FR2930605B1/fr not_active Expired - Fee Related
-
2009
- 2009-04-10 CN CN2009801145679A patent/CN102016331B/zh not_active Expired - Fee Related
- 2009-04-10 EP EP09738332.7A patent/EP2283238B1/fr not_active Not-in-force
- 2009-04-10 US US12/989,099 patent/US8494789B2/en not_active Expired - Fee Related
- 2009-04-10 WO PCT/FR2009/000419 patent/WO2009133298A2/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009133298A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009133298A2 (fr) | 2009-11-05 |
| WO2009133298A9 (fr) | 2012-05-10 |
| US8494789B2 (en) | 2013-07-23 |
| CN102016331B (zh) | 2013-08-21 |
| CN102016331A (zh) | 2011-04-13 |
| FR2930605A1 (fr) | 2009-10-30 |
| EP2283238B1 (fr) | 2014-08-13 |
| FR2930605B1 (fr) | 2015-01-16 |
| US20110046901A1 (en) | 2011-02-24 |
| WO2009133298A3 (fr) | 2010-01-07 |
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