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EP3067571B1 - Dispositif d'alimentation - Google Patents

Dispositif d'alimentation Download PDF

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Publication number
EP3067571B1
EP3067571B1 EP16000049.3A EP16000049A EP3067571B1 EP 3067571 B1 EP3067571 B1 EP 3067571B1 EP 16000049 A EP16000049 A EP 16000049A EP 3067571 B1 EP3067571 B1 EP 3067571B1
Authority
EP
European Patent Office
Prior art keywords
hydraulic system
supply
liquid
operating
hydraulic
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.)
Active
Application number
EP16000049.3A
Other languages
German (de)
English (en)
Other versions
EP3067571A1 (fr
Inventor
Kany Helmfried
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydac Systems and Services GmbH
Original Assignee
Hydac Systems and Services GmbH
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Filing date
Publication date
Application filed by Hydac Systems and Services GmbH filed Critical Hydac Systems and Services GmbH
Publication of EP3067571A1 publication Critical patent/EP3067571A1/fr
Application granted granted Critical
Publication of EP3067571B1 publication Critical patent/EP3067571B1/fr
Active legal-status Critical Current
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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
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/06—Use of special fluids, e.g. liquid metal; Special adaptations of fluid-pressure systems, or control of elements therefor, to the use of such fluids
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20523—Internal combustion engine
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/214—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being hydrotransformers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H7/00—Armoured or armed vehicles
    • F41H7/02—Land vehicles with enclosing armour, e.g. tanks

Definitions

  • the invention relates to a supply device for a military vehicle having the features in the preamble of claim 1.
  • Such a supply device is already from DE 10 2009 035 810 A1 known in which a military vehicle has a wading device.
  • a consumer of this wading device is designed in the form of a hydrostatic cylinder, with which an armored flap can be actuated to close an air- and/or exhaust gas-conducting opening in order to avoid unwanted water ingress when wading.
  • the hydrostatic cylinder is part of the military vehicle's supply hydraulic system and can be controlled by means of a flame-retardant liquid, which is designed as an aqueous polymer solution available under the brand name "HYDROTHERM 15 M, type HFC".
  • This flame-retardant liquid is conveyed within the supply hydraulic system by means of two fluid pumps arranged sequentially with respect to one another, each of which has its own drive for actuation, which is designed either electrically or with a power take-off of a traction motor of the vehicle.
  • the pertinent design represents an autonomous independent HFC concept, the realization of which is relatively expensive, since the otherwise oil-hydraulic controlled components of the hydraulic supply circuit have to be replaced by components that are HFC-compatible, i.e. that can withstand the aggressive, especially corrosive HFC fluid from the sealing and material side, which proves to be cost-intensive in the implementation. It has also been shown that due to the self-sufficient design of the overall system from the first conception stage of the armored vehicle onwards, retrofitting vehicles that have already been delivered and are in use with HFC supply circuits and their components is hardly possible at a reasonable cost.
  • the US 2014/0004998 A1 relates to a hybrid hydraulic powertrain configured to propel a vehicle and reuse the propulsion energy. This means that brake wear can be reduced, fuel consumption reduced and smaller drive motors can be used than in comparable non-hybrid vehicles.
  • the DE 10 2005 061 990 A1 relates to a drive with energy recovery and retarder function, comprising a hydrostatic piston machine which is connected to an accumulator for storing pressure energy and a pressure-limiting valve for generating a braking effect.
  • the U.S. 3,432,437 A1 relates to a fire resistant hydraulic fluid.
  • the invention is based on the object of creating a supply device for use in military vehicles whose supply hydraulics can be designed in a cost-effective manner for operation with flame-retardant liquids such as HFC and, if necessary, with existing military vehicles, some of which are already in use, can be easily retrofitted.
  • the supply hydraulics are separated from the working hydraulics in a media-tight manner, that at least one fluid pump is provided to operate the supply hydraulics, which can be actuated by at least one hydraulic motor of the working hydraulics during operation of the vehicle, that the fluid pump of the supply hydraulics the hydraulic motor of the working hydraulics is connected by means of a coupling device, preferably using a mechanical or hydromechanical clutch or a transmission, such as a converter transmission, and that the coupling device is used between the fluid pump and the hydraulic motor, and has at least one leakage fluid connection, preferably a leakage fluid connection, which leads into the supply hydraulics and a further leakage fluid connection which leads into the working hydraulics, the above-described task can be solved in an advantageous manner.
  • a coupling device preferably using a mechanical or hydromechanical clutch or a transmission, such as a converter transmission
  • the invention is initially based on the knowledge that in armored vehicles, parts of the same are regularly armored to a greater or lesser extent; be it for reasons of practicability and/or for weight and cost reasons.
  • the floor assembly of a combat, reconnaissance or artillery tank with its chain or wheel drive usually in the form of an internal combustion engine with its oil-hydraulic components, such as lubrication systems, hydraulic gears, etc., is usually more heavily armored than the rotatable one mounted on the floor assembly gun turret.
  • Comparable considerations also apply to the navy, whose ships basically have a heavily armored hull for the accommodation of the ship's propulsion system, usually in the form of a ship's diesel engine in contrast, have at least partially weaker armored superstructures.
  • the invention now proposes the solution, in any case those hydraulic components that are at least partially weakly armored or possibly not protected at all, such as Triggering mechanisms for weapons, for example in the form of automatic machine guns, door actuation systems, sensor devices, radar systems and the like, to be designed in such a way that they can be operated with flame-retardant liquids, such as the HFC already mentioned, which helps to save costs significantly, since the number of can be reduced to the components of the supply hydraulics that have to be monitored and maintained during long-term operation and are exposed to the HFC liquid.
  • Triggering mechanisms for weapons for example in the form of automatic machine guns, door actuation systems, sensor devices, radar systems and the like
  • flame-retardant liquids such as the HFC already mentioned
  • the fluid pump of the supply hydraulic system is connected to the hydraulic motor of the working hydraulic system by means of a coupling device, preferably using a mechanical or hydromechanical clutch or a transmission, such as a converter transmission.
  • a mechanical or hydromechanical clutch enables the fluid pump to be driven by the hydraulic motor without slip and with low losses.
  • the use of a converter transmission prevents this due to the fluidic flow connection between the converter pump and the converter turbine the blocking of the hydraulic motor in the event of a blockage of the fluid pump, for example in the event of a failure in combat.
  • the coupling device is used by installing it between the fluid pump and hydraulic motor and has at least one leakage fluid connection, preferably one leakage fluid connection, which leads to the supply hydraulics and another leakage fluid connection, which leads to the working hydraulics. Consequently, as a result of the associated lower tightness requirements in the area of the coupling device compared to leak-free sealing concepts, seals and sealing concepts that are structurally simpler and can therefore be implemented more cost-effectively can be used.
  • the supply hydraulics with the flame-retardant liquid (HFC) carried therein as a fluidic drive means can not only be used to control deep fording devices or weapon devices, but can also be used, for example, to hydraulically control door actuation and locking devices. Furthermore, the use of the supply device does not require the application of Armored ships and vehicles to be limited, but can also be used in aircraft, especially in the field of military use if necessary.
  • HFC flame-retardant liquid
  • the supply hydraulics at least with those components that come into contact with the flame-retardant liquid, can be installed as a retrofit kit in military vehicles that already have the working hydraulics at the factory.
  • the vehicle drive and its working hydraulics can be supplied with a working medium that is optimized for this purpose, in particular with regard to lubrication and corrosion protection - but which is relatively easily ignited and combustible - which in particular is a mineral, synthetic or semi-synthetic hydraulic oil, in particular an engine oil or a transmission oil of the usual type.
  • the fluid pump takes the flame-retardant liquid from a storage tank and, after supplying the respective consumer, returns it to the relevant tank using a type of supply circuit.
  • the hydraulic motor which can be actuated by a drive of the military vehicle, takes the working medium from a further, second storage tank, separate from the first storage tank, and, after passing through the hydraulic motor when driving the fluid pump of the supply circuit, returns it to the relevant tank using a type of working circuit.
  • the separation of the supply circuit and the working circuit prevents the flame-resistant liquid and the working medium, which is not compatible with it, from accidentally coming into contact with one another.
  • the working hydraulics can be accommodated in a particularly heavily armored area of the military vehicle, such as the underbody of a tracked or wheeled vehicle, and the supply hydraulics can be accommodated in an area that is less armored in comparison, such as the superstructure of the vehicle.
  • the one in the 1 The supply device 9 shown is used to supply a hydraulic consumer 10, which is part of a supply hydraulic system 11 of a military vehicle that carries a flame-retardant liquid (not shown).
  • the consumer 10 can be fluidically controlled by means of the flame-retardant liquid in that it is designed as part of a military facility 12 with a single-acting hydrostatic cylinder 13 that can be reset via a spring element and that actuates an armored flap 14 in the sense of closing an opening to be sealed on the military vehicle .
  • the flap 14 can be part of the armor of the vehicle.
  • the flap 14 is pivotable about an axis of rotation 15 and is designed to be pivotable about the axis of rotation 15 by means of the hydrostatic cylinder 13 .
  • the hydrostatic cylinder 13 is connected as a whole to 12 designated device and supplied by a fluid pump 16 in the form of a first hydraulic pump with a constant delivery volume via a supply network 17 with flame-retardant liquid 18.
  • the fluid in the form of a flame-retardant liquid 18 is taken from a storage tank 19 by the fluid pump 16 and, after supplying the consumer 10 , is returned to the storage tank 19 using a type of supply circuit 20 as part of the supply network 17 .
  • the amount of flame-retardant liquid 18 stored in the storage tank 19 is exposed to atmospheric pressure.
  • the fluid pump 16 for operating the supply hydraulic system 11 can be designed, for example, as a conventional rotary pump and, as will be explained in more detail below, can be actuated by a hydraulic motor 21 of a working hydraulic system 22 when the vehicle is in operation.
  • a high-pressure filter 23 is inserted into a supply line 24 for the device 12 upstream of the fluid pump 16 .
  • the high-pressure filter 23 has a filtration fineness that is designed for the dirt sensitivity of the downstream devices in the supply circuit 20, such as the valves 25, 26 and any servo valves of the device 12. Furthermore, the filtration fineness of the high-pressure filter 23, which is operated in the main flow, is dimensioned to match the chemical composition and the physical material properties of the flame-resistant liquid 18 of the supply circuit 20.
  • non-return valves 27, 28 connected sequentially one after the other in the supply line 24 to the consumer 10.
  • the check valves 27, 28 open in the direction of flow to the device 12 and the consumer 10 and block the flow of fluid in the reverse direction.
  • the device 12 is provided with a pressure-dependent control in a manner known per se, with the two valves 25, 26 arranged parallel to one another limiting the fluid pressure at the consumer 10 in the exemplary embodiment shown for reasons of safety and the possibility of overriding the pressure-dependent control.
  • One valve 25 is a pressure relief valve and the other valve 26 is a safety valve.
  • the two valves 25, 26 are each connected to a fluid-carrying section of the supply line 24 via nodes 32, 33 of the supply network 17, which section runs between the two check valves 27, 28.
  • each of the two valves 25, 26, when open, returns the flame-retardant liquid 18 to the storage tank 19 via a common node 30 of the supply network 17 and a common return line 34 adjoining this.
  • the second safety valve 26 is a hand-lever-actuated valve with which a pre-pressure accumulator 35 can be depressurized for maintenance.
  • flame-retardant liquid 18 can be drained off with the second manual drain valve 26 in order to check a pressure switch 36 and a warning switch 37 .
  • the electric pressure switch 36 and the electric warning switch 37 are provided in the supply line 24 upstream of the second check valve 28 .
  • the energy accumulator 35 which is designed as a piston accumulator in the exemplary embodiment shown, whereby an operating pressure of the device 9 of up to about 200 bar is readily possible.
  • the piston accumulator 35 has the function of a static pretensioning device which ensures in every operating phase of the device 9 and in particular when the fluid pump 16 is switched off that the compressibility of the liquid 18 and its negative effect on the Operating behavior of the device 9 are avoided.
  • the piston accumulator 35 guarantees emergency operation of the device 12 shown in the event of a failure of the fluid pump 16.
  • a 3/2-way valve 38 which serves as a switching valve 39 for the consumer 10 and is connected upstream of it, is preferably electromagnetically controllable.
  • a fluid backflow occurs from the working chamber of the hydrostatic cylinder 13 via a return feed line 29, which opens into the return line 34 at a node 31 of the supply network 17, from which the returning portion of the flame-retardant liquid 18 is conducted to the storage tank 19.
  • the hydrostatic cylinder 13 and thus the flap 14 are in a rest position in which an opening on the vehicle to be closed with the flap 14 is not closed.
  • the warning switch 37 can be positively coupled to the pressure switch 36 in the manner of a chained system and is used to make the hydraulic device 12 operational or to unlock the flap 14 for the purpose of pivoting and closing the vehicle hatch (not shown).
  • the supply circuit 20 has a number of pressure monitoring devices with which the respective fluid pressure in various functional sections of the supply circuit 20 can be measured and displayed.
  • a first manometer 40 is connected in the supply line 24 downstream of the fluid pump 16 between the latter and the high-pressure filter 23 .
  • a second manometer 41 is provided in the supply line 24 between the adjustable pressure relief valve 25 and the manually operated safety valve 26 in the pertinent control part of the device 12.
  • a temperature of the liquid is recorded by means of a temperature monitoring device 42 designed as a temperature sensor TS.
  • a temperature monitoring device 42 designed as a temperature sensor TS.
  • countermeasures can be initiated as soon as definable temperature limit values are exceeded.
  • the fluid pump 16 can be actuated by the hydraulic motor 21 of the working hydraulic system 22 associated with the vehicle drive and media-tightly separated from the hydraulic supply system 11 or the supply network 17 when the military vehicle is in operation.
  • the fluid pump 16 of the supply circuit 20 is connected to the hydraulic motor 21 of the hydraulic working circuit 44 associated with the working hydraulic system 22 by means of a coupling device 45 in the manner of a clutch, which connects an output shaft 46 of the hydraulic motor 21 to an input shaft 47 of the fluid pump 16.
  • This coupling device 45 is thus used between the fluid pump 16 and the hydraulic motor 21 and has a leakage fluid connection 48 which guides the leakage amount of the hardly inflammable liquid 18 into the supply circuit 20 .
  • the coupling device 45 has a further leakage fluid connection 49 which returns any leakage quantity of a working medium 50 driving the hydraulic motor 21 to the working circuit 44 .
  • the working medium 50 is a working medium that is more easily flammable than the flame-retardant liquid, for example hydraulic oil produced on an oil basis.
  • the hydraulic motor 21, which can be actuated indirectly by a vehicle drive M, draws the working medium 50 from a second storage tank 51, which is separate from the first storage tank 19 Hydraulic pump suction side with the second storage tank 51 and connected on the pressure side via a third check valve 55 to the hydraulic motor 21 in such a way that the check valve 55 opens in the direction of flow from the pressure medium delivery device 52 to the hydraulic motor 21 and blocks against this flow direction.
  • the working medium 50 is fed back into the second storage tank 51, the amount of fluid in which is exposed to atmospheric pressure.
  • This "mineral oil assembly” is already included in many vehicles and is only tapped to supply the HFC assemblies (motor-pump combination).
  • the assembly between the components 27 and 28 is pressure-controlled. At P min (pressure switch) the conveyor 52 starts; at P max the device 52 turns off.
  • a line 56 that opens into a line section 54 between the pressure medium delivery device 52 and the third check valve 55 leads at its other end to an inlet side of a pressure-limiting valve, which forms a safety device 57 and whose outlet side opens into a return flow line 58 leading from the hydraulic motor 21 to the second storage tank 51 .
  • This ensures that the pressure medium delivery device 52 is relieved against the second storage tank 51 both in the event of an extremely high delivery resistance at the hydraulic motor 21 and when this hydraulic motor 21 is blocked.
  • FIG. 2 shows a supply device in which the supply circuit 120 associated with the supply hydraulic system 111 is designed as a so-called closed hydraulic circuit.
  • the liquid 118 which is again difficult to ignite, is in the closed hydraulic circuit under the preload pressure of the preload device 160, this time in the form of a bladder or diaphragm accumulator.
  • this hydraulic circuit seen upstream of the fluid pump 116, next to the named reservoir 160, there is a compensating tank 167, which can be filled with the flame-resistant liquid 118 that is under the preload pressure of a working gas. Thanks to the energy store 160 with its preload pressure, water from the HFC circuit is prevented from evaporating or evaporating even at elevated temperatures.
  • This liquid 118 present on the suction side of the fluid pump 116 is brought via the high-pressure filter 123, two check valves 127, 128 which follow it downstream and open in this direction of flow, and the supply line 124 to an actuating valve (not shown) and a consumer connected to it (also not shown in detail), comparable to the solution according to the 1 with the 3/2-way valve 38 and the consumer 10.
  • a return line 129 which returns the liquid from this actuating valve, opens into a line section 134, which then opens into a line section 161, which leads from the reservoir 160 to the fluid pump 116, so that insofar as the closed circuit results.
  • a spring-loaded check valve (not shown) can be switched into the line section 161, the opening direction of which points towards the expansion tank or storage tank 167.
  • a manually actuatable maintenance valve 162 in the manner of a 2/2-way valve is arranged, the input side of which opens out via a line section 163 into the supply line 124 to the actuating valve.
  • the outlet side of the maintenance valve 162 opens into the return line 129 .
  • the actuating valve can thus be bridged when the maintenance valve 162 is in the open position.
  • the maintenance valve 162 also has a blocking position, which blocks the flow from the supply line 124 to the return line 129 in the manner of a check valve function, but releases the flow in the opposite direction.
  • a line section 164 of the supply circuit 120 opens out between the two check valves 127, 128, to which a high-pressure hydraulic accumulator 135 in the manner of a piston accumulator and the two electric pressure switches 136, 137 are connected via branch lines. Also connected to this line section 164 is the manual release valve 126, which can also be opened manually and is connected in parallel with the other pressure-limiting valve 125 in such a way that the liquid 118 is fed via the line section 134 into the line section 161 leading to the reservoir 160 and the fluid pump 116 can.
  • Both the pressure in the high-pressure accumulator 135 and the pressure between the two check valves 127, 128, or on the inlet side of the two valves 125, 126, are each recorded by means of a manometer 165, 141.
  • the gas filling pressure in the reservoir 160 can be detected by means of a further manometer 166 which can be connected to the gas side of the reservoir 160 to carry the medium.
  • the working hydraulic system 122 to be attributed to the vehicle drive M of the military vehicle is provided, which uses the working medium 150, in particular in the form of hydraulic oil, which is more easily flammable than the flame-retardant liquid 118. having.
  • This working hydraulic system 122 is media-tightly separated from the supply hydraulic system 111, the fluid pump 116 of which can be actuated by a hydraulic motor 121 of the working hydraulic system 122 when the vehicle is in operation.
  • the working hydraulic system 122 has the same structure as the first exemplary embodiment, including a storage tank 151, a pressure medium conveying device 152, a check valve 155 and a pressure-limiting valve 157, this working hydraulic system 122 will not be discussed further and in this respect the statements made regarding the exemplary embodiment will not be discussed further 1 referred.
  • Fluids have proven to be particularly advantageous for the present application, which are provided in the manner of aqueous polymer solutions with a water content of up to 50%, preferably with a water content of between 35% and 50%.
  • the fluid in question is biodegradable and free of nitrite and monoethylene glycol.
  • the fluid in question may also contain diglycol and alkanolamine as ingredients.
  • Such flame-retardant hydraulic fluids can be freely obtained on the market under the brand name "HYDROTHERM 15 M, type HFC”. According to the technical specification, HYDROTHERM 46 M is classified as a flame-retardant hydraulic fluid of the HFC group according to DIN 51 502 (aqueous polymer solution of ISO VG 46 with a water content of up to 50%).
  • Ionic liquids can also be used as the liquid that is difficult to ignite.
  • Ionic liquids consist of anions and cations and are therefore structurally salts.
  • the salts forming the ionic liquids have a low melting point and are in the liquid phase even at room temperature. All salts that are in pure liquid form at a temperature of 100°C or less are called ionic liquids.
  • Ionic liquids usually have a low vapor pressure (10 -13 bar) and are flame retardant. Their low gas solubility and lubricity are particularly advantageous for their use in hydraulic systems. In addition, they are thermally stable up to a temperature of more than 250°C. In addition, they are often physiologically harmless and therefore more environmentally and resource-friendly than the well-known hydraulic oils.
  • ionic liquids In the case of ionic liquids, the choice of cations and anions can be used to set the polarity and thus, for example, their miscibility with water or oily substances. In addition, their suitability in terms of lubricating effect, vapor pressure limits, pressure stability, chemical and thermal inertness and their viscosity as a function of temperature can be influenced.
  • Ionic liquids have no appreciable vapor pressure, so that no cavitation occurs in hydraulic systems, which improves the operational safety compared to hydraulic systems that are operated with the known hydraulic oils.
  • the cation of the ionic liquid used can preferably be, for example, a phosphonium cation or an ammonium cation or an imidazolium cation, a pyridinium cation or a pyrazolium cation or a triazolium cation.
  • ionic liquids are mentioned as examples: 1-butyl-3-methylimidazolium tetrafluoroborate (miscible with water, stable up to >250 degrees Celsius, chemically inert, good lubricating properties), 1-ethyl-3-methylimidazolium ethyl sulfate (miscible with water, stable up to 250 degrees Celsius, ready availability), 1-butyl-3-methylimidazolium hexafluoro-phosphate (water-immiscible, stable up to 250 degrees Celsius, chemically inert, good lubricating properties), 1-ethyl-3-methylimidazoliumbistrifluoro-methanesulfonylamide (water-immiscible, stable up to >300 degrees Celsius, chemically inert, good lubricating properties), 3-methyl-1-ethylpyridinium methyl sulfate (miscible with water, stable up to 250 degrees Celsius, chemically inert), butyl
  • valves For example, seat valves, logic valves or slide valves can be used as valves.
  • the switching valve 38 designed as a 3/2-way valve with an electromagnetic actuator for actuating the consumer 10
  • a switching valve with more than Three connections and more than two switching positions can be provided.
  • the switching valve can be designed in particular as a 4/3-way valve with a blocking middle position.
  • the valves of the supply devices explained above can be designed with an electromagnetic actuator, with an additional or exclusive manual actuating device and/or a hydraulic pilot control.
  • the fire protection is improved with the solution according to the invention.
  • the HFC used does not burn, at least not directly, so that in the event of a hit there is time to leave the vehicle and rescue the injured. Furthermore, the use of HFC liquids is environmentally friendly.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lubricants (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)

Claims (6)

  1. Dispositif d'alimentation d'un véhicule militaire, qui comprend une hydraulique (22) de travail, une hydraulique (11) d'alimentation, un liquide (18) difficilement inflammable, un milieu (50) de travail plus facile à allumer que le liquide (18) difficilement inflammable et un consommateur (10) et qui est prévu pour l'alimentation au moins du consommateur (10), qui peut être commandé au moyen du liquide (18, 118) difficilement inflammable et qui est une partie de l'hydraulique (11) d'alimentation conduisant le liquide (18) difficilement inflammable, et comprenant, à attribuer à un entraînement de véhicule, l'hydraulique (22) de travail, qui a le milieu (50) de travail, comme de l'huile hydraulique, plus facile à allumer que le liquide (18) difficilement inflammable, caractérisé en ce que l'hydraulique (11) d'alimentation est séparée d'une manière étanche au milieu, de l'hydraulique (22) de travail, en ce qu'il est prévu, pour le fonctionnement de l'hydraulique (11) d'alimentation, au moins une pompe (16) à fluide, qui peut être actionnée, lorsque le véhicule est en fonctionnement, par au moins un moteur (21) hydraulique de l'hydraulique (22) de travail, en ce que la pompe (16) à fluide de l'hydraulique (11) d'alimentation est raccordée au moteur (21) hydraulique de l'hydraulique (22) de travail au moyen d'un dispositif (45) d'accouplement, de préférence en utilisant un accouplement mécanique ou hydromécanique ou une transmission, comme une transmission à convertisseur, et en ce que le dispositif (45) d'accouplement intervient entre la pompe (16) à fluide et le moteur (21) hydraulique et dispose d'au moins un raccord (48) de fluide de fuite, de préférence d'un raccord (48) de fluide de fuite, qui va à l'hydraulique (11) d'alimentation, et d'un autre raccord (49) de fluide de fuite, qui va à l'hydraulique (22) de travail.
  2. Dispositif d'alimentation suivant la revendication 1, caractérisé en ce que l'hydraulique (11) d'alimentation est, au moins avec les composants, qui viennent en contact avec le liquide (18) difficilement inflammable, réalisée sous la forme d'un ensemble de rééquipement pouvant être incorporé à des véhicules militaires, qui disposent déjà en atelier de l'hydraulique (22) de travail.
  3. Dispositif d'alimentation suivant la revendication 1 ou 2, caractérisé en ce que la pompe (16) à fluide prélève le liquide difficilement inflammable d'un réservoir (19) et, après alimentation du consommateur (10) respectif, le retourne au réservoir (19) concerné en utilisant l'hydraulique (11) d'alimentation.
  4. Dispositif d'alimentation suivant la revendication 3, caractérisé en ce que le moteur (21) hydraulique, pouvant être actionné par un entraînement de traction du véhicule militaire, prélève le milieu (50) de travail d'un autre deuxième réservoir (50) distinct du premier réservoir (51) et, après passage dans le moteur (21) hydraulique alors que la pompe (16) à fluide de l'hydraulique (11) d'alimentation est entraînée, le retourne au réservoir (50) concerné en utilisant l'hydraulique (22) de travail.
  5. Dispositif d'alimentation suivant l'une des revendications précédentes, caractérisé en ce que le liquide (18) difficilement inflammable est à base d'eau, tandis que le milieu (50) de travail facile à allumer est à base d'huile.
  6. Dispositif d'alimentation suivant l'une des revendications précédentes, caractérisé en ce que, dans une partie particulièrement très cuirassée du véhicule militaire, comme le dessous de caisse d'un véhicule sur chenilles ou sur roues, peut être logée l'hydraulique (22) de travail et dans une partie moins cuirassée, comme la superstructure du véhicule, peut être logée l'hydraulique (11) d'alimentation.
EP16000049.3A 2015-03-10 2016-01-12 Dispositif d'alimentation Active EP3067571B1 (fr)

Applications Claiming Priority (1)

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DE102015003014.0A DE102015003014A1 (de) 2015-03-10 2015-03-10 Versorgungsvorrichtung

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EP3067571B1 true EP3067571B1 (fr) 2022-08-03

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Publication number Priority date Publication date Assignee Title
DE102016125872A1 (de) * 2016-12-29 2018-07-05 Krauss-Maffei Wegmann Gmbh & Co. Kg Militärisches Fahrzeug
DE102018007007B4 (de) * 2018-09-05 2025-07-03 Hydac Systems & Services Gmbh Hydraulische Anlage, insbesondere für militärisch genutzte Fahrzeuge
US20220136530A1 (en) * 2020-11-03 2022-05-05 Deere & Company Systems and method for pressurizing a fluid to perform an operation of a machine

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US3432437A (en) * 1966-01-24 1969-03-11 Mc Donnell Douglas Corp Fire resistant hydraulic fluid and lubricant compositions
DE102005061990A1 (de) * 2005-12-23 2007-07-05 Bosch Rexroth Aktiengesellschaft Antrieb mit Energierückgewinnungs- und Retarderfunktion
US20070197410A1 (en) * 2006-02-21 2007-08-23 Rohmax Additives Gmbh Energy efficiency in hydraulic systems
DE102009035810B4 (de) 2009-08-01 2019-06-19 Hydac Systems & Services Gmbh Vorrichtung zur Versorgung mindestens eines hydraulischen Verbrauchers eines militärisch genutzten Fahrzeugs
WO2014005051A1 (fr) * 2012-06-29 2014-01-03 Eaton Corporation Transmission hydraulique
DE102013108843A1 (de) * 2013-08-15 2015-02-19 Claas Selbstfahrende Erntemaschinen Gmbh Hydrauliksystem

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EP3067571A1 (fr) 2016-09-14
DE102015003014A1 (de) 2016-09-15

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