CN102927069A - A hydraulic control system and a control method of the system - Google Patents
A hydraulic control system and a control method of the system Download PDFInfo
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- CN102927069A CN102927069A CN2012102827240A CN201210282724A CN102927069A CN 102927069 A CN102927069 A CN 102927069A CN 2012102827240 A CN2012102827240 A CN 2012102827240A CN 201210282724 A CN201210282724 A CN 201210282724A CN 102927069 A CN102927069 A CN 102927069A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2289—Closed circuit
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- 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
- F15B21/14—Energy-recuperation means
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
- E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
- E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
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- 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
- F15B1/027—Installations or systems with accumulators having accumulator charging devices
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- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
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- 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
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
- F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
- F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
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- 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
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
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- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/163—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for sharing the pump output equally amongst users or groups of users, e.g. using anti-saturation, pressure compensation
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- 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
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
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- 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
- F15B2211/2053—Type of pump
- F15B2211/20561—Type of pump reversible
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- 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
- F15B2211/2053—Type of pump
- F15B2211/20569—Type of pump capable of working as pump and motor
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- 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
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- 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
- F15B2211/27—Directional control by means of the pressure source
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- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
- F15B2211/7121—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in series
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- 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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
Abstract
This disclosure is directed towards a hydraulic control system (10, 47, 54) comprising a combined closed loop hydraulic circuit (14) for controlling two or more hydraulic actuators (21, 22) and a hydraulic energy storage system comprising one or more accumulators (19, 20). The hydraulic control system (10, 47, 54) further comprises a power unit (11). The closed loop hydraulic circuit (14) comprises a hydraulic machine (16) operably connected to the power unit (11), first and second accumulators (19, 20) for storing hydraulic fluid, first and second hydraulic actuators (21, 22), a first valve (17) for selectively directing hydraulic fluid between the hydraulic machine (16) and either the first accumulator (19) or the first hydraulic actuator (21) and a second valve (18) for selectively directing hydraulic fluid between the hydraulic machine (16) and either the second accumulator (20) or the second hydraulic actuator (22). The first hydraulic actuator (21) is fluidly connected to the second hydraulic actuator (22) by one or more conduits (29).
Description
Technical field
The present invention relates to a kind of hydraulic control system, comprise the closed loop hydraulic circuit that is used for two or more hydraulic actuators of control of combination and the hydraulic energy storage system that comprises one or more accumulators (reservoir).
Background technique
The work machine that comprises backhoe loader, excavator, loader or analog usually comprises a hydraulic control system, and this hydraulic control system is used for controlling one or more working tools, such as scraper bowl, pivoted arm, rear shovel, grab bucket and analog.Hydraulic control system can comprise an open loop oil hydraulic circuit, and this open loop oil hydraulic circuit is used for being operatively connected to one or more actuators of each working tool.The open loop oil hydraulic circuit can use one or more pumps via one or more valves and pipeline hydraulic fluid to be directed to actuator.Yet, valve layout in such loop may be very complicated and, if two or more actuators are carried out identical function at a working tool, guarantee that so applying similar all the time load by each actuator may require complicated control software and loop.Therefore, hydraulic control system can comprise closed loop hydraulic circuit but not the open loop oil hydraulic circuit, thereby overcomes these problems.
At document US-B-6, the example of the closed-loop hydraulic system that is used for the control working tool is disclosed in 520,731.Its disclosed hydraulic control system is used for the swing of the rear shovel on the control backhoe loader.Closed loop comprises variable delivery pump, and this variable delivery pump is directed to a pair of swing cylinder via pipeline with hydraulic fluid.Swing cylinder is attached to the pivoted arm on the rear shovel via frame and controls motion or the swing of rear shovel from a side to opposite side.Wobbler in the variable delivery pump is adjusted to around closed loop and guides hydraulic fluid along either direction, thereby allows hydraulic fluid to be directed in arbitrary swing cylinder.Closed loop is arranged to, when the piston of one of them swing cylinder stretches out, and the piston-retraction of another swing cylinder.Closed loop comprises that also the fixed displacement filling pump is in order to replenish hydraulic fluid in the situation that exist any leakage to supply with in the closed loop.
Yet, US-B-6,520,731 do not disclose following device, by this device closed loop hydraulic circuit and the other oil hydraulic circuit of the other actuator that is used for being operatively connected to working tool are integrated.In addition, the use of fixed displacement filling pump may increase complexity and the cost of hydraulic control system.Moreover, US-B-6,520,731 not open devices from power to variable delivery pump that supply with.
Usually, the pump in the hydraulic control system is by from the active force unit of work machine, supply with power such as internal-combustion engine, miniature turbine, motor or analog.Power unit with high power output capability is commonly used, because hydraulic control system and work machine power train may have high power requirement.Yet, have the fuel quantity that the power unit of high power output capability may be had relatively high expectations, may be relatively heavier and may give off relatively a large amount of refuses.Therefore, discharging the energy of storing in conjunction with the hydraulic energy storage system and when the extra energy of needs in the work machine that comprises the power unit with low power output capability, is common already.US-B-6,520,731 openly do not use the hydraulic energy storage system with closed loop hydraulic circuit.
Summary of the invention
According to an aspect of the present invention, provide a kind of hydraulic control system, it comprises power unit and closed loop hydraulic circuit, and described closed loop hydraulic circuit comprises: the hydraulic equipment that functionally is connected to power unit; The first and second accumulators that are used for the storage hydraulic fluid; The first and second hydraulic actuators; The first valve, this first valve are used for optionally guiding hydraulic fluid between described hydraulic equipment and described the first accumulator or described the first hydraulic actuator; And second valve, this second valve is used for optionally guiding hydraulic fluid between described hydraulic equipment and described the second accumulator or described the second hydraulic actuator; Wherein, described the first hydraulic actuator is connected to described the second hydraulic actuator by one or more pipeline fluids.
The present invention also provides a kind of method of controlling hydraulic control system, and this hydraulic control system comprises power unit and closed loop hydraulic circuit, and described closed loop hydraulic circuit comprises: the hydraulic equipment that functionally is connected to described power unit; The first and second accumulators that are used for the storage hydraulic fluid; The first and second hydraulic actuators; The first and second valves; Wherein, described valve can be operated to implement: fill pattern, and hydraulic fluid is directed to described the first accumulator from described the second accumulator in this fill pattern; Or unload mode playback, unload at this that hydraulic fluid is directed to described the second accumulator from described the first accumulator in mode playback, so that described hydraulic equipment outputting power; Or turn to pattern, and turn at this that hydraulic fluid is directed to the second hydraulic actuator from the first hydraulic actuator in pattern, perhaps opposite.
Only in the mode of example, come with reference to the accompanying drawings the swing of as shown in the drawing combination and the embodiment of accumulator energy-storage system are described.
Description of drawings
Fig. 1 is an embodiment's of hydraulic control system of the present invention schematic diagram;
Fig. 2 is another embodiment's of hydraulic control system of the present invention schematic diagram;
Fig. 3 is another embodiment's of hydraulic control system of the present invention schematic diagram; And
Fig. 4 is can be by the side view of a kind of work machine of hydraulic control system of the present invention control.
Embodiment
A kind of hydraulic control system for work machine of relate generally to of the present invention, this hydraulic control system combines closed loop hydraulic circuit with the hydraulic energy reclaiming system.Closed loop hydraulic circuit can be used for storing hydraulic fluid and discharges when the extra power of other parts needs of hydraulic control system being used for thereafter.Closed loop hydraulic circuit also can be used for controlling two or more hydraulic actuators.Hydraulic control system also can comprise be used to the auxiliary circuit of controlling other hydraulic actuator.
The present invention relates to the work machine of any type, its example comprises backhoe loader, excavator, forestry machine, reaper, carloader, forward shovel, bulldozer and wheel loader.This work machine usually comprises power unit, and this power unit is directed to oil hydraulic circuit and/or power train via transmission device with power.The position of the controlled manufacturing instrument of oil hydraulic circuit, working tool usually comprises one or more pivoted arms, arm spare or rod member, described one or more pivoted arms, arm spare or rod member are attached with at least one operating apparatus.Operating apparatus can be any type, and its example comprises scraper bowl, shovel, drill bit, cold planer head, fells head, fork, grab bucket, hammer, Cutter, thumb member (thumb) and material processed arm.Power train can be delivered to wheel and/or crawler belt so that work machine can move from transmission device with power.
Fig. 1 illustrates the embodiment for the hydraulic control system 10 of control work machine, and this work machine comprises power unit 11, transmission device 12, power train 13, closed loop hydraulic circuit 14 and auxiliary circuit 15.Power unit 11 can be any type, and its example comprises internal-combustion engine, miniature turbine and motor.Transmission device 12 can be any type, and is for example manual, automatic or automanual.Transmission device 12 clutch or torque-converters (not shown) can be set so that can engage with power unit 11 and break away between power unit 11 and transmission device 12.Power train 13 clutch or torque-converters can be set so that can engage with transmission device 12 and break away between transmission device 12 and power train 13.
Closed loop hydraulic circuit 14 comprises the interconnection pipeline 23,24,25,26,27,28,29 of hydraulic equipment 16, the first valve 17, second valve 18, the first accumulator 19, the second accumulator 20, the first hydraulic actuator 21, the second hydraulic actuator 22 and some, and their layout is described hereinafter.Hydraulic equipment 16 can be reversible, thereby it can be used as hydraulic fluid pump or comes work as the motor that is driven by the motion of hydraulic fluid.Hydraulic equipment 16 can be variable delivery pump, such as axial piston pump, radial piston pump or inclined shaft pump.Hydraulic equipment 16 can comprise be attached to the adjusting device (not shown), such as the live axle (not shown) of wobbler, the flow rate that this adjusting device control hydraulic fluid passes hydraulic equipment 16.
Hydraulic equipment 16 functionally is connected to power unit 11.The connection of operability makes it possible to transferring power between parts.Therefore, the power output from power unit 11 can be passed to hydraulic equipment 16.This can realize by the live axle that ultromotivity unit 11 output shaft in direct future is connected to hydraulic equipment 16.The live axle of hydraulic equipment 16 can pass transmission device 12 and extend, but is not that transmission device 12 is supplied with power, and/or engages by the output shaft of spline with power unit 11.The live axle of the output shaft of power unit 11 and hydraulic equipment 16 can be included in the single axle.Alternatively, the live axle of hydraulic equipment 16 is connected to the output shaft of transmission device 12 operably.The output shaft of the live axle of hydraulic equipment 16 and transmission device 12 can for example utilize the joint spline on the axle or functionally be connected to each other via clutch or torque-converters.
Hydraulic equipment 16 is connected to the first valve 17 and is connected to second valve 18 by pipeline 24 fluids by pipeline 23 fluids.These fluids connect so that the flow of pressurized physical efficiency flows along either direction between parts.The first valve 17 is connected to the first accumulator 19 and is connected to the first hydraulic actuator 21 by pipeline 27 fluids by pipeline 25 fluids.Second valve 18 is connected to the second accumulator 20 and is connected to the second hydraulic actuator 22 by pipeline 28 fluids by pipeline 26 fluids.The first valve 17 and second valve 18 can be the valves of any type, and its example comprises selector valve, guiding valve, cartridge valve or poppet valve.The first valve 17 and second valve 18 can be operated in any suitable manner, for example manually, by using guide's hydraulic pressure installation or by using electric control device.The first valve 17 can operate so that the flow of pressurized physical efficiency is guided to the first accumulator 19, hydraulic equipment 16 and the first hydraulic actuator 21 or is guided out from the first accumulator 19, hydraulic equipment 16 and the first hydraulic actuator 21.Second valve 18 can operate so that hydraulic fluid can be guided to the second accumulator 20, hydraulic equipment 16 and the second hydraulic actuator 22 or be guided out from the second accumulator 20, hydraulic equipment 16 and the second hydraulic actuator 22.
The pressure of the hydraulic fluid in the one or both in the first accumulator 19 and the second accumulator 20 can be higher and can be higher than the external pressure of hydraulic control system 10.Hydraulic fluid can be stored under a pressure in the first accumulator 19, and this pressure can be higher than, be lower than or the approaching pressure that equals to be stored in the hydraulic fluid in the second accumulator 20.Thereby accumulator 19,20 can be directly connected to the first and second valves 17,18 or integrate with the first and second valves 17,18 and not need pipeline 25,26.
The first and second hydraulic actuators 21,22 can be the hydraulic actuators of any type, such as connecting rod, welding, single-acting, dbl act, telescopic, plunger or without rod-type.In the embodiment shown in fig. 1, the first hydraulic actuator 21 and the second hydraulic actuator 22 are dbl act hydraulic actuators.In the first and second hydraulic actuators 21,22 each comprises actuator body 30,31, piston 32,33, the first hydraulic chamber 34, the 35 and second hydraulic chamber 36,37.
The second chamber 36,37 can be by each other fluid connection of pipeline 29.Alternatively, the second hydraulic chamber 36 of the first hydraulic actuator 21 can be connected to by a pipeline (not shown) fluid the first hydraulic chamber 35 of the second hydraulic actuator 22, and the second hydraulic chamber 37 of the second hydraulic actuator 22 can be connected to by a pipeline (not shown) fluid the first hydraulic chamber 34 of the first hydraulic actuator 21.
Piston 32,33 can comprise piston rod 38,39 and piston head 40,41 separately.The first hydraulic chamber 34, the 35 and second hydraulic chamber 36,37 can be positioned at piston head 40,41 both sides in cylinder body 30,31.Because piston head 40,41 inboard forms sealing with cylinder body 30,31, so hydraulic fluid can transmission between the first hydraulic chamber 34, the 35 and second hydraulic chamber 36,37.
The first and second hydraulic actuators 21,22 each in cylinder body 30 more than one, 31 and piston 32,33 can be arranged.For example, the first hydraulic actuator 21 can comprise two cylinder bodies and two pistons, wherein, the first hydraulic chamber of each in two cylinder bodies is connected to the first valve 17 by pipeline 27 fluids, and each the second hydraulic chamber in the cylinder body is connected to the second hydraulic chamber 37 of the second hydraulic actuator 22 by pipeline 29 fluids.
Piston rod 38 shown in Fig. 1,39 extends through cylinder body 30,31 from the second hydraulic chamber 36,37.Yet piston rod 38,39 can extend through cylinder body 30,31 from the first hydraulic chamber 34,35 in opposite direction.Piston 32,33 can be two bar types, wherein, piston rod 38,39 extend through the first hydraulic chamber 34, the 35 and second hydraulic chamber 36,37 the two.The first and second hydraulic actuators 21,22 can be single-acting hydraulic actuators, wherein, are provided with a spring in the second hydraulic chamber 36,37.
The first and second hydraulic actuators 21,22 piston rod 38,39 can be attached at least one parts of working tool such as pivoted arm, thereby can handle the position of working tool.Piston 32,33 also can operative attachment to the operating apparatus of working tool, such as one group of Cutter or fell head.The first and second hydraulic actuators 21,22 and any pipeline therebetween or parts can be arranged to so that when stretching out for one in the piston 32,33, another piston 32,33 is retracted.
Auxiliary circuit 15 can comprise oil hydraulic pump 42, valve group 43, main working tool oil hydraulic circuit 44 and pipeline 45,46.Oil hydraulic pump 42 can comprise the input shaft (not shown), and this input shaft functionally is connected to the live axle of hydraulic equipment 16, but so that oil hydraulic pump 42 functionally is connected to power unit 11 and driven force unit 11 receives power.The connection of operability can comprise the spline of the joint on the input shaft of the live axle of hydraulic equipment 16 and oil hydraulic pump 42.Alternatively, the output shaft of the live axle of the input shaft of oil hydraulic pump 42, hydraulic equipment 16 and power unit 11 can be comprised of single axle.Oil hydraulic pump 42 can be variable delivery pump.Oil hydraulic pump 42 can comprise the adjusting device that is connected to input shaft, such as wobbler, and the flow rate that the hydraulic fluid of oil hydraulic pump 42 is passed in this adjusting device control.
In Fig. 1, on the side relative with transmission device 12 that shown oil hydraulic pump 42 is positioned at hydraulic equipment 16.Yet oil hydraulic pump 42 can alternatively be arranged between transmission device 12 and the hydraulic equipment 16.
Oil hydraulic pump 42 can be arranged to via pipeline 45 from hydraulic pressure reservoir (not shown) to the valve group 43 the guiding hydraulic fluids.The flow rate of the hydraulic fluid in the auxiliary circuit 15 and pressure can be controlled by the position of the adjusting device in the operating hydraulically operated pump 42.Valve group 43 can guide hydraulic fluid via pipeline 46 around main working tool oil hydraulic circuit 44.Main working tool oil hydraulic circuit 44 can comprise the hydraulic actuator that is attached to one or more working tools and/or operating apparatus.Therefore, main working tool oil hydraulic circuit 44 can be controlled the position of one or more working tools and/or operating apparatus.Main working tool oil hydraulic circuit 44 can also the operation task apparatus.The first hydraulic actuator 21 and second hydraulic actuator 22 of the hydraulic actuator of working tool oil hydraulic circuit 44 and closed loop hydraulic circuit 14 can be attached on the identical or different parts of working tool and/or operating apparatus.
Hydraulic fluid in the closed loop hydraulic circuit 14 is when being replaced/remain in the closed loop hydraulic circuit 14 when moving by hydraulic equipment 16, the first hydraulic actuator 21 or the second hydraulic actuator 22.Yet, comprise that the closed loop of various parts such as valve, pump and actuator also generally includes the device that may make hydraulic flow leakage.As a result, thus can be incorporated into hydraulic pressure in hydraulic control system 10 fills the loop and replenishes hydraulic fluid and compensate any hydraulic flow leakage or loss to supply with to closed loop hydraulic circuit 14.Thus, can in closed loop hydraulic circuit 14, keep the hydraulic fluid of constant volume, and the volume of keeping can be maintained in the predetermined scope.Hydraulic pressure is filled the loop and can be extracted hydraulic fluid and can supply with additional hydraulic fluid to any parts of closed loop hydraulic circuit 14 from hydraulic pressure reservoir or auxiliary circuit 15, and described any parts comprise pipeline 24,27,29,28.
Fig. 2 illustrates an embodiment of hydraulic control system 47, and this hydraulic control system comprises hydraulic pressure filling loop 48.In this example, hydraulic pressure is filled loop 48 and is comprised reduction valve 49, safety check 50,51 and pipeline 52,53.Pipeline 52 is depicted as and is connected to pipeline 45.Yet pipeline 52 can be connected to any parts of auxiliary circuit 15.Reduction valve 49 is directed to safety check 50,51 with hydraulic fluid from pipeline 52 via pipeline 53.But safety check 50,51 fluids are connected to and thus hydraulic fluid is directed to pipeline 23,24.
Reduction valve 49 has reduced the pressure that supplies to the hydraulic fluid of pipeline 53 from auxiliary circuit 15.The change amplitude of the hydraulic fluid pressure of being implemented by reduction valve 49 can be that fix or adjustable and can with closed loop hydraulic circuit 14 in pressure correlation.Reduction valve 49 can manually be operated, passes through to use the operation of guide's hydraulic pressure installation or operated by the use electric control device.Safety check 50,51 can have cracking pressure, this cracking pressure is safety check 50,51 pressure of opening under this pressure, this cracking pressure be adapted so that hydraulic fluid only the hydraulic fluid in closed loop hydraulic circuit 14 drop to when being lower than a predetermined pressure and just enter closed loop hydraulic circuit 14 from pipeline 53.Cracking pressure can be the pressure of the hydraulic fluid in the pipeline 53, and therefore, when safety check 50,51 can the pressure in closed loop hydraulic circuit 14 drops to the pressure that is lower than in the pipeline 53 hydraulic fluid is discharged in the closed loop hydraulic circuit 14.
In another embodiment, as shown in Figure 3, hydraulic control system 54 comprises hydraulic pressure filling loop 55, and wherein, hydraulic pressure filling pump 56 is used to supply with hydraulic fluids to closed loop hydraulic circuit 14.Hydraulic pressure filling pump 56 is directed to safety check 59,60 from hydraulic pressure reservoir 57 via pipeline 58 with hydraulic fluid, and is directed to reduction valve 61 via pipeline 62.But safety check 59,60 fluids are connected to pipeline 23,24 or any other parts of closed loop hydraulic circuit 14, and reduction valve 61 can be directed to hydraulic pressure reservoir 63 via pipeline 64 with hydraulic fluid.Hydraulic pressure reservoir 57,63 can be identical hydraulic pressure reservoir and can be identical with hydraulic pressure reservoir from hydraulic fluids to oil hydraulic pump 42 that supply with.
Hydraulic pressure filling pump 56 can be the fixed displacement oil hydraulic pump and can comprise inner or outside driving mechanism.Hydraulic pressure filling pump 56 is connected to live axle, the output shaft from power unit 11, the output shaft of transmission device 12 or the input shaft of oil hydraulic pump 42 of hydraulic equipment 16 operably.Therefore, hydraulic pressure filling pump 56 functionally is connected to power unit 11 and is driven by power unit 11.Oil hydraulic pump 42 can functionally be connected to transmission device 12 via hydraulic equipment 16 and/or via hydraulic pressure filling pump 56.
But reduction valve 61 can be that fix or adjustable and pilot line 62 in the pressure of hydraulic fluid.The pressure of keeping in the pipeline 62 can with closed loop hydraulic circuit 14 in pressure correlation.Reduction valve 61 can manually be operated, passes through to use the operation of guide's hydraulic pressure installation or operated by the use electric control device.Safety check 59,60 can have cracking pressure, and the pressure of the hydraulic fluid in the closed loop hydraulic circuit 14 drops to the pressure hydraulic fluid that is lower than predetermined and enters closed loop hydraulic circuit 14 in case this cracking pressure is suitable for.The position control valve of useful any type replaces safety check 59,60.
Reduction valve 61 guarantees, the output of the hydraulic pressure filling pump 56 how pressure of the hydraulic fluid in the pipeline 62 all remains on constant level.Therefore, if the pressure of the hydraulic fluid in the closed loop hydraulic circuit 14 drops to the pressure that is lower than the hydraulic fluid in the pipeline 62, then hydraulic fluid can be released in the closed loop hydraulic circuit 14 by safety check 59,60.Because the leakage in the closed loop hydraulic circuit 14 can cause the reduction of hydraulic fluid pressure, the volume of the hydraulic fluid in the closed loop hydraulic circuit 14 will maintain relatively constant level.
At hydraulic control system 10,47,52 duration of works, power unit 11 can be supplied with power to transmission device 12, hydraulic equipment 16, oil hydraulic pump 42 and/or power train 13.Closed loop hydraulic circuit 14 and auxiliary circuit 15 can be that work simultaneously, that work alone or idle.
The live axle that the input shaft of hydraulic equipment 16 is connected with oil hydraulic pump can rotate when they are connected via the operability with power unit 11 and receive power.When the live axle rotation of the input shaft of oil hydraulic pump 42 and hydraulic equipment 16, the adjusting device in hydraulic equipment 16 and/or the oil hydraulic pump 42 can be oriented to so that the hydraulic fluid in closed loop hydraulic circuit 14 and/or the auxiliary circuit 15 is not replaced.Be the situation of wobbler for one of them adjusting device, can be configured to zero degree in the normal direction of axle and the angle between the wobbler face replaced to prevent hydraulic fluid.
In another arrangement, one or more clutches or torque-converters (not shown) can be set so that hydraulic equipment 16 can engage with transmission device 12 or power unit 11 and break away between the output shaft of the live axle of hydraulic equipment 16 and transmission device 12 or power unit 11.Oil hydraulic pump 42 clutch or torque-converters (not shown) can be set so that can engage with hydraulic equipment 16 and break away between the input shaft of the live axle of hydraulic equipment 16 and oil hydraulic pump 42.Clutch or torque-converters can be engaged with one in hydraulic equipment 16 and/or oil hydraulic pump 42/the two provides power.Oil hydraulic pump 42 can be constant flow pump or variable delivery pump.If constant flow pump, and therefore can only supply with the fixedly hydraulic fluid of flow rate for the power of specified level, oil hydraulic pump 42 can operate by engaging suitable clutch or torque-converters.If variable delivery pump, oil hydraulic pump 42 can be by engaging suitable clutch or torque-converters and operating by the orientation of regulating adjusting device.Hydraulic equipment 16 can operate by engaging clutch or torque-converters and by the orientation of regulating the adjusting device in the hydraulic equipment 16.
When closed loop hydraulic circuit 14 operation, hydraulic fluid is guided around closed loop hydraulic circuit 14.Under the operator scheme of a kind of being called as " fill pattern ", the adjusting device in the hydraulic equipment 16 is oriented to, so that hydraulic equipment 16 is by utilizing the power of being supplied with by power unit 11 as pumping up effect.Valve 17,18 activated and hydraulic fluid is guided into the first accumulator 19 from the second accumulator 20.The pressure that hydraulic fluid is stored in the first accumulator is greater than the pressure of storing in the second accumulator.
In another operator scheme that can be described as " unloading mode playback " of hydraulic control system 10, the adjusting device in the hydraulic pressure installation 16 can be oriented to, so that hydraulic equipment 16 works as motor.Valve 17,18 activated and the first accumulator 19 discharges hydraulic fluid, and this hydraulic fluid is guided through hydraulic equipment 16 and enters the second accumulator 20.Therefore hydraulic equipment 16 replenishes from the power of power unit 11 and can connect to transmission device 12 and/or oil hydraulic pump 42 via operability supplies with power.Because the pressure that hydraulic fluid is stored in the first accumulator 19 is higher than the pressure of storage in the second accumulator 20, hydraulic fluid is delivered to the second accumulator 20 from the first accumulator 19.
Those of skill in the art will recognize that above-mentioned unload put with fill pattern in, the first and second accumulators may exchange mutually.Therefore, hydraulic fluid may be directed to the first accumulator 19 from the second accumulator 20 in unloading mode playback, and is directed to the second accumulator 20 from the first accumulator 19 in fill pattern.
In another operator scheme that is called as " turning to pattern " of hydraulic control system 10, the adjusting device of hydraulic equipment 16 is oriented to, so that hydraulic equipment 16 is by utilizing the power of being supplied with by power unit 11 as pumping up effect.Hydraulic fluid is pumped into the first hydraulic chamber 34 of the first hydraulic actuator 21 via the first valve 17, second valve 18 and pipeline 23,24,27,28 by the first hydraulic chamber 35 from the second hydraulic actuator 22.Therefore, the pressure of the hydraulic fluid in the first hydraulic chamber 34 raises and piston 32 moves, and piston rod 38 is further stretched out from cylinder body 30.Hydraulic fluid in first or second hydraulic chamber 34,36 of the first hydraulic actuator 21 is sent to first or second hydraulic chamber 35,37 of the second hydraulic actuator 22.Therefore, piston 33 moves, and piston rod 39 further is retracted in the cylinder body 31.
Alternatively, during turning to pattern, hydraulic fluid can be pumped into the first hydraulic chamber 35 of the second hydraulic actuator 22 by the first hydraulic chamber 34 from the first hydraulic actuator 21.Therefore piston 33 can stretch out, and therefore piston 32 can retract.
Turn to pattern, fill pattern and unload mode playback can be at any time manually or by utilizing control loop automatically to implement.When being operated, piston 32,33 working tool or operating apparatus can use the pattern that turns to when being attached to.
When the power that is required by auxiliary circuit 15 and power train 13 driven force unit 11 power output very low or power unit 11 was lower than a predetermined value, fill pattern can be implemented.Predetermined value can be maximum power output or the power output capability of power unit 11.Thereby the output of the power of power unit 11 can be increased to supply with enough power to hydraulic equipment 16 and allow fill pattern to be implemented.
When the power that is required by auxiliary circuit 15 and power train 13 driven force unit 11 power output very high or power unit 11 was higher than a predetermined value, unloading mode playback can be implemented.Should predetermined value can be maximum power output or the power output capability of power unit 11.When unloading mode playback and be implemented, power can be fed into auxiliary circuit 15 and/or be fed into power train 13 via transmission device 12 or power unit 11 via oil hydraulic pump 42.The power of supplying with can be independent of or be complemented at the power that is supplied to closed loop hydraulic circuit 14, auxiliary circuit 15, transmission device 12 and power train 13 by power unit 11.
Fig. 4 illustrates one type work machine 65, and its form is backhoe loader, and this work machine can use hydraulic control system 10,47,54.The working tool 66,67th of backhoe loader, loader 66 and rear shovel 67, they respectively comprise a series of pivoted arm 68,69,70,71.In Fig. 4, be attached to pivoted arm 68,71 as the operating apparatus 72,73 shown in the scraper bowl.Aforesaid hydraulic control system 10,47,54 can be used to control position and the orientation of backhoe loader itself, rear shovel 67 and loader 66.
In a kind of arrangement, piston 32,33 can be attached to the motion from a side to a side or the swing of rear shovel 67 and control rear shovel 67.The actuator of auxiliary circuit 15 can be attached to the pivoted arm 68,69,70,71 and scraper bowl 70,71 and control thus their position of rear shovel 67 and loader 66.
Industrial applicibility
Hydraulic control system 10 of the present invention, 47,54---wherein closed loop hydraulic circuit 14 is combined with closed loop and hydraulic energy storage system---can be incorporated in the diversified work machine.
By come with single hydraulic equipment 16 Control loop oil hydraulic circuit and hydraulic energy storage system the two, avoided too high complexity and cost.
Hydraulic control system 10,47,54 can comprise power unit 11, and the power output capability of this power unit 11 is lower than power train 13 and/or auxiliary circuit 15 needed power.When power train 13 and/or auxiliary circuit 15 needs extra power, can use and unload mode playback.
Claims (24)
1. a hydraulic control system (10,47,54) comprises power unit (11) and closed loop hydraulic circuit (14), and described closed loop hydraulic circuit (14) comprising:
Functionally be connected to the hydraulic equipment (16) of described power unit (11);
The first and second accumulators (19,20) that are used for the storage hydraulic fluid;
The first and second hydraulic actuators (21,22);
The first valve (17), described the first valve are used for optionally guiding hydraulic fluid between described hydraulic equipment (16) and described the first accumulator (19) or described the first hydraulic actuator (21); And
Second valve (18), described second valve are used for optionally guiding hydraulic fluid between described hydraulic equipment (16) and described the second accumulator (20) or described the second hydraulic actuator (22);
Wherein, described the first hydraulic actuator (21) is connected to described the second hydraulic actuator (22) by one or more pipelines (29) fluid.
2. hydraulic control system according to claim 1 (10,47,54), wherein, described the first and second hydraulic actuators (21,22) comprise at least two hydraulic chamber (34,35,36,37) separately.
3. hydraulic control system (10 according to claim 1 and 2,47,54), wherein, described hydraulic equipment (16) also comprises live axle, described power unit (11) also comprises output shaft, the described output shaft of described power unit (11) be connected the described live axle of hydraulic equipment (16) and functionally connect.
4. hydraulic control system according to claim 3 (10,47,54), wherein, the described output shaft of described power unit (11) be connected the described live axle of hydraulic equipment (16) and functionally connect via the spline that engages.
5. hydraulic control system according to claim 1 and 2 (10,47,54), wherein, described hydraulic equipment (16) functionally is connected to described power unit (11) via transmission device (12).
6. hydraulic control system according to claim 5 (10,47,54), wherein, described hydraulic equipment (16) also comprises live axle, and described transmission device (12) also comprises output shaft, described output shaft be connected the spline of live axle by clutch or joint and functionally connect.
7. each described hydraulic control system (10,47,54) according to claim 2-6, wherein, described the second hydraulic chamber (36,37) connects by pipeline fluid.
8. each described hydraulic control system (10 according to claim 2-6,47,54), wherein, described the second hydraulic chamber (36) fluid of described the first hydraulic actuator (21) is connected to described first hydraulic chamber (35) of described the second hydraulic actuator (22), and described the second hydraulic chamber (37) fluid of described the second hydraulic actuator (22) is connected to described first hydraulic chamber (34) of described the first hydraulic actuator (21).
9. according to each described hydraulic control system (10,47,54) in the claims, wherein, described hydraulic equipment (16) comprises live axle and adjusting device, wherein, and the flow rate that the hydraulic fluid of described hydraulic equipment (16) is passed in described adjusting device control.
10. according to each described hydraulic control system (10 in the claims, 47,54), also comprise auxiliary circuit (15), described auxiliary circuit (15) comprises the oil hydraulic pump (42) that functionally is connected to described power unit (11), wherein, described oil hydraulic pump (42) is configured to optionally hydraulic fluid be guided to main working tool oil hydraulic circuit (44).
11. hydraulic control system according to claim 10 (10,47,54), wherein, described oil hydraulic pump (42) comprises input shaft, and described hydraulic equipment (16) comprises live axle, described input shaft be connected the spline of live axle by clutch or joint and functionally connect.
12. according to claim 10 or 11 described hydraulic control systems (10,47,54), wherein, described oil hydraulic pump (42) comprises input shaft and adjusting device, wherein, and the flow rate that the hydraulic fluid of described oil hydraulic pump (42) is passed in described adjusting device control.
13. each described hydraulic control system (10,47,54) according to claim 10-12, wherein, described main working tool oil hydraulic circuit (44) comprises at least one actuator of the working tool of controlling work machine.
14. according to each described hydraulic control system (10 in the claims, 47,54), wherein, described the first and second hydraulic actuators (21,22) comprise separately piston (32,33), the fluid between the described hydraulic actuator (21,22) connects so that when a piston (32, another piston (33,32) stretches out when 33) retracting.
15. according to each described hydraulic control system (10,47,54) in the claims, wherein, the pressure that is stored in the hydraulic fluid in described the first accumulator (19) is higher than the pressure that is stored in the hydraulic fluid in described the second accumulator (20).
16. according to each described hydraulic control system (10,47,54) in the claims, wherein, the swing of the rear shovel on described the first and second hydraulic actuators (21,22) control backhoe loader.
17. according to each described hydraulic control system (10,47,54) in the claims, comprise that also fluid is connected to the hydraulic pressure filling loop (48,55) of described closed loop hydraulic circuit (14), wherein, described hydraulic pressure is filled loop (48,55) and is comprised at least one reduction valve (49,61), at least one safety check (50,51,59,60) and at least one pipeline (52,53,58,62,64).
18. hydraulic control system according to claim 17 (10,47,54) wherein, is directed to described hydraulic pressure by the oil hydraulic pump (42) that functionally is connected to described hydraulic equipment (16) with hydraulic fluid and fills loop (48,55).
19. hydraulic control system according to claim 17 (10,47,54) wherein, is directed to described hydraulic pressure by the hydraulic pressure filling pump (56) that functionally is connected to described hydraulic equipment (16) with hydraulic fluid and fills loop (48,55).
20. the method for a control hydraulic control system (10,47,54), described hydraulic control system comprises power unit (11) and closed loop hydraulic circuit (14), and described closed loop hydraulic circuit (14) comprising:
Functionally be connected to the hydraulic equipment (16) of described power unit (11);
The first and second accumulators (19,20) that are used for the storage hydraulic fluid;
The first and second hydraulic actuators (21,22);
The first and second valves (17,18);
Wherein, described valve (17,18) can be operated to implement:
Fill pattern, hydraulic fluid is directed to described the first accumulator (19) from described the second accumulator (20) in this fill pattern; Or
Unload mode playback, unload at this that hydraulic fluid is directed to described the second accumulator (20) from described the first accumulator (19) so that described hydraulic equipment (16) outputting power in mode playback; Or
Turn to pattern, turn in the pattern hydraulic fluid to be directed to described the second hydraulic actuator (22) or opposite from the first hydraulic actuator (21) at this.
21. method according to claim 20 wherein, functionally is connected to described hydraulic equipment (16) for the oil hydraulic pump (42) that fluid is directed to auxiliary circuit (15).
22. according to claim 20 or 21 described methods, wherein, when being lower than a predetermined level, the power output of described power unit (11) uses described fill pattern.
23. each described method according to claim 20-22 wherein, is used the described mode playback that unloads when the output of the power of described power unit (11) is higher than a predetermined level.
24. each described method according to claim 20-23, wherein, hydraulic pressure fill loop (48,55) with the volume maintenance of the hydraulic fluid in the closed loop hydraulic circuit (14) in a predetermined scope.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1113884.9A GB2493706B (en) | 2011-08-11 | 2011-08-11 | Combined closed loop hydraulic circuit and hydraulic energy storage system |
| GB1113884.9 | 2011-08-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102927069A true CN102927069A (en) | 2013-02-13 |
Family
ID=44764387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102827240A Pending CN102927069A (en) | 2011-08-11 | 2012-08-09 | A hydraulic control system and a control method of the system |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2557239A1 (en) |
| CN (1) | CN102927069A (en) |
| GB (1) | GB2493706B (en) |
| RU (1) | RU2605514C2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201931A (en) * | 2014-06-18 | 2015-12-30 | 博世力士乐（常州）有限公司 | Hydraulic system |
| CN107000355A (en) * | 2014-09-19 | 2017-08-01 | Siti-B&T集团股份公司 | The hydraulic system for the forcing press for being used to manufacture ceramic product is particularly for forcing press |
| CN107120320A (en) * | 2017-04-19 | 2017-09-01 | 北京科技大学 | A kind of many container type circular energy storage devices and its energy storing-releasing method |
| CN113090610A (en) * | 2021-03-12 | 2021-07-09 | 上海卫星工程研究所 | Surface mount type piezoelectric screw pump hydraulic linear actuator and driving method thereof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20150059325A1 (en) * | 2013-09-03 | 2015-03-05 | Caterpillar Inc. | Hybrid Apparatus and Method for Hydraulic Systems |
| EP3083369A4 (en) * | 2013-12-19 | 2017-10-04 | Volvo Construction Equipment AB | A hydraulic load sensing system |
| GB2529909B (en) | 2014-09-30 | 2016-11-23 | Artemis Intelligent Power Ltd | Industrial system with synthetically commutated variable displacement fluid working machine |
| CN106122126B (en) * | 2016-08-18 | 2018-01-05 | 武汉船用机械有限责任公司 | The control method and device of a kind of hydraulic system |
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- 2012-08-06 EP EP12179392A patent/EP2557239A1/en not_active Withdrawn
- 2012-08-09 CN CN2012102827240A patent/CN102927069A/en active Pending
- 2012-08-10 RU RU2012134393/06A patent/RU2605514C2/en active
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| DE9218087U1 (en) * | 1991-11-08 | 1993-10-21 | Mannesmann Ag | Drive device |
| US20060162988A1 (en) * | 2002-12-03 | 2006-07-27 | Monika Ivantysynova | Hydraulic steering device for vehicles |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105201931A (en) * | 2014-06-18 | 2015-12-30 | 博世力士乐（常州）有限公司 | Hydraulic system |
| CN107000355A (en) * | 2014-09-19 | 2017-08-01 | Siti-B&T集团股份公司 | The hydraulic system for the forcing press for being used to manufacture ceramic product is particularly for forcing press |
| CN107120320A (en) * | 2017-04-19 | 2017-09-01 | 北京科技大学 | A kind of many container type circular energy storage devices and its energy storing-releasing method |
| CN107120320B (en) * | 2017-04-19 | 2018-09-14 | 北京科技大学 | A kind of more container type circular energy storage devices and its energy storing-releasing method |
| CN113090610A (en) * | 2021-03-12 | 2021-07-09 | 上海卫星工程研究所 | Surface mount type piezoelectric screw pump hydraulic linear actuator and driving method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2557239A1 (en) | 2013-02-13 |
| RU2012134393A (en) | 2014-02-20 |
| GB2493706A (en) | 2013-02-20 |
| RU2605514C2 (en) | 2016-12-20 |
| GB201113884D0 (en) | 2011-09-28 |
| GB2493706B (en) | 2013-11-06 |
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