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EP0615583B1 - Vorrichtung zur rückgewinnung von energie - Google Patents

Vorrichtung zur rückgewinnung von energie Download PDF

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Publication number
EP0615583B1
EP0615583B1 EP92924657A EP92924657A EP0615583B1 EP 0615583 B1 EP0615583 B1 EP 0615583B1 EP 92924657 A EP92924657 A EP 92924657A EP 92924657 A EP92924657 A EP 92924657A EP 0615583 B1 EP0615583 B1 EP 0615583B1
Authority
EP
European Patent Office
Prior art keywords
working cylinder
accumulator
working
hydraulic
piston
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.)
Expired - Lifetime
Application number
EP92924657A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0615583A1 (de
Inventor
Frantisek Krnavek
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 Technology GmbH
Original Assignee
Hydac Technology GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hydac Technology GmbH filed Critical Hydac Technology GmbH
Publication of EP0615583A1 publication Critical patent/EP0615583A1/de
Application granted granted Critical
Publication of EP0615583B1 publication Critical patent/EP0615583B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a device for recovering energy, in particular of location energy in working machines, with the characteristics of Preamble of claim 1.
  • PL-PS 127 710 In another known device for energy recovery Location energy (PL-PS 127 710) is the working organ with an additional, single-acting hydraulic linear motor (working cylinder) provided stored between the machine frame and the work organ and with a hydropneumatic accumulator and a distributor with a container or a hydrogenerator is connected.
  • working cylinder additional, single-acting hydraulic linear motor
  • hydropneumatic accumulator and a distributor with a container or a hydrogenerator is connected.
  • JP-A-60-250128 is a device for recovery of energy known in which between the piston chamber of the with the Memory connected working cylinder and the memory a switching device is available.
  • this known device can be completely the piston-side amount of fluid in the working cylinder, which is connected to the accumulator connected, give in to this, the related process several times is repeatable in succession, so that a precisely quantifiable amount of energy can be stored in the memory for later retrieval. It
  • a related Design is not enough to achieve a satisfactory energy recovery to get.
  • the object of the invention based, while maintaining the advantages of the known energy recovery devices an improved device for energy recuperation to accomplish.
  • a relevant task is with the features of claim 1 in solved in its entirety.
  • the fact that according to the characteristic part of the Claim 1 of the piston chamber of the hydraulic working cylinder with the hydropneumatic accumulator via a seat valve, especially in the form of a Cartridge valve, which interacts with a control distributor, which is connected to a pressure relay as part of a control device is, and that the control device with its control input to one Low pressure branch is connected to the movable parts of the Working machine, especially in the form of a boom, has it It has been shown that higher amounts of energy can be recovered than with the previously known devices.
  • the control behavior is also the Device improved and the scope of the necessary circuit optimized.
  • a hydraulically actuated switching device for example in the form of a 2/2-way valve.
  • the device is the piston chamber of the working cylinder connected to the accumulator by means of a fluid-carrying line with the piston chamber of the other Working cylinder connected, in which a check valve or a so-called.
  • One-way valve is switched.
  • the one-way valve is preferably a throttle element hydraulically connected in series and assigned a back branch or a branch line of communicating piston rod spaces of the mentioned hydraulic linear units is available via the distributor of the hydraulic machine system with the piston chamber of the hydraulic, at hydropneumatic accumulator connected by means of the one-way valve Linear motor in connection, this back branch or the branch line also connected to a liquid container by means of a pressure valve is.
  • the piston chamber of the hydraulic working cylinder is with the hydropneumatic Accumulator by means of a saddle valve, a control distributor or a control device formed by a pressure relay, this device with its control input on a low pressure branch connected from the work organ.
  • a Changeover or changeover valve provided, the output side to a feed channel connected.
  • the control unit's tank connection communicates with the interconnected piston rod spaces of the drive cylinders, which further interconnects with a hydraulically operated cylinder are, the axis of symmetry preferably with the axis of symmetry of the cone of a safety valve is identical, the piston of this cylinder on the Side of the supply of hydraulic fluid to the safety valve against the forehead of the Cone of this valve is supported.
  • Positional energy of a work organ of construction or agricultural machinery consists in that by interconnecting them with one of the hydraulic linear motors (Working cylinder) for lifting or lowering the boom enables one relatively high working pressure or relatively low flow rates of hydraulic fluid use what reduces the manufacturing costs and at the same time the Efficiency of the device increases, thereby increasing the overall profitability of the Device is increased. It is also advantageous that the device has an overall represents compact, relatively small unit, which may also be as one Additional device for retrofitting to already delivered Working machines can be used. Ultimately, the invention enables Device for lifting and lowering the work organ, for example in the form of a boom of the machine in question, the full active force that theoretically results to also be achieved.
  • 1 to 4 show different embodiments based on circuit diagrams the device for energy recovery.
  • FIG. 1 shows an embodiment of the device according to the invention with two rectilinear hydraulic motors or working cylinders 3.5 for lifting and lowering a working device 2, for example in the form of a hydraulic one Backhoe.
  • the piston chamber 32 of the drive cylinder 3 is with a Hydraulic fluid filled and to a hydropneumatic memory 4, for example in the form of a membrane or bladder accumulator, which can be connected with a safety valve 7 and one connected to a liquid container 9 Intake valve or check valve 11 is provided.
  • the piston rod space 31 of the working cylinder 3 is on the piston rod chamber 51 of the further working cylinder 5 connected.
  • a hydraulically actuated switching device (not shown) must be switched on, a switching device (not shown) to this switching device can be switched on in series in the circle.
  • the piston chamber 32 of the double-acting, linear working cylinder 3 is in front of Switching device to a liquid container 9 via a safety valve 7 in Form of a pressure relief valve connected.
  • the hydraulic switching device is e.g. a valve in the form of a 2/2-way valve that next to a hydraulic signal can also be actuated by an electrical signal, which by swiveling the control device in by the operator the lifting or lowering position of the work device 2 is caused.
  • the hydraulic switching device is, for example, a distributor in the form a 3/2-way valve, which is also operated by a hydraulic or electrical Signal can be actuated, which by a pressure increase in the through Piston rod chambers 31 and 51 of the working cylinders 3 and 5, respectively Work facility 2 is caused.
  • the static load capacity of the working device 2 is in the form of a Arm or boom in the sense of lowering by the on the safety valve of the hydraulic system of the machine set static pressure determines which in the piston chamber 52 of the working cylinder 5 of the working device 2 acts, and further determined by the current working pressure in the hydropneumatic accumulator 4, which in the piston chamber 32 of the accumulator hydraulic motor or working cylinder 3 acts.
  • the pressure of the safety valve 7 with the pressure of the Corresponding safety valve of the hydraulic system of the working machine is preferably set the same.
  • the static load capacity of the work equipment 2 in the sense of lowering is then only through that on the safety valve of the hydraulic system of the machine set static Pressure determines which in the piston rod spaces 31 and 51 of the working cylinder 3 or 5 acts. This makes both sides more static Load capacity reached.
  • the hydraulic fluid is from the Piston chamber 52 via the hydraulic system of the machine into the liquid container 9 and the filling liquid from the piston chamber 32 of the working cylinder 3 pressed out into the hydropneumatic accumulator 4.
  • the Liquid in the hydropneumatic accumulator 4 becomes the piston of the working cylinder 3 raised, whereby the lowering of the working device 2 braked without the stored in the hydropneumatic memory 4 Energy is consumed.
  • the device according to the invention for recuperating the position energy of a Work equipment can be used to advantage in construction and earth-moving machinery find, but also be advantageous for machines with a high Action force of the work facility is required, e.g. for loading machines, Hoists, universal hydraulic excavators as well as for loading and unloading devices.
  • the one-way valve 14 with a throttle element 15, for example in the form of an adjustable throttle valve, a throttle disc or throttle nozzle, hydraulically connected in series; where appropriate, the Piston chambers 52 and 32 together using a freely definable throttle profile connected.
  • the branch line 12 is with a liquid container 9 via a pressure valve 10 in connection, which is preferably on a Medium pressure in the branch line 12 of the standard hydraulic system Machine is set.
  • the piston chamber 32 is the working cylinder 3 with the hydropneumatic accumulator or storage 4 by means of of the control device 65.
  • the control device 65 has a saddle or cartridge valve 61, a control manifold 62 in the form of a 4/2-way valves and possibly a pressure relay 63, which in the case an electrically controllable distributor 62 also by an electrical one Limit switch can be formed.
  • control device 65 With its control input 64, the control device 65 has a low-pressure branch 13, which cooperates with the boom 2, hydraulically connected or - if the mentioned electrical limit switch is used is a spring loaded stop within the reach of or close to the movable one, with the slide of the section of the distributor of hydraulic Machine system for moving or starting the boom 2 mechanically coupled components attached.
  • the piston 18 of the hydraulically actuated actuating cylinder 17 preferably has the Diameter which corresponds to the diameter of the active part of the cone of Safety valve 7 corresponds, and is on the side of the supply of hydraulic fluid supported to the safety valve 7 against the conical end of this valve 7.
  • the performance of the engine and hydrogenerators can preferably be either by using a less powerful drive unit or by changing the setting, e.g. Decrease in engine speed by changing the control lever stop of the injection pump of the diesel engine, be reduced.
  • control device is located 65 in the neutral position of the actuator of the boom 2 in the connected position.
  • the static load capacity again in the sense of lowering the boom 2 is seen through the on the secondary safety valve of the hydraulic Machine system and the pressure set on the safety valve 7 set pressure determined.
  • the pressure of the safety valve 7 is preferably equal to the pressure of the hydraulic machine system set.
  • Fig.2 is when lowering the boom 2 and due to the resistance the amount of earth reaches the full active lowering force because of the cone end of the safety valve 7 driving piston 18 the same safety pressure up to zero at full pressure in communicating piston rod spaces 31 and 51 decreases when this pressure simultaneously closes the closing process of the cartridge valve 61 of the control device 65 causes what the Pressure drop and loss of hydrostatic energy from the hydropneumatic Accumulator 4 avoids.
  • the piston chamber 32 of the hydraulic Linear motor 3 by means of the one-way valve 14, possibly also by means of of the throttle element 15, fed with the hydraulic fluid, whereby the through Leakage of the devices caused losses of hydraulic fluid at least be compensated for during a possible, by opening the Throttle element 15 created excess pressure fluid to achieve full working pressure in the hydropneumatic accumulator 4 even with one Reduction of the stroke of the boom 2 ensures.
  • Opening of the throttle element 5 or the same comes out of operation it when lifting the boom 2 in a certain position to compensate for the Pressure values in the piston chambers 51 and 32, so that the hydraulic fluid in both rooms 52,32 only from the hydraulic machine system is delivered what the achievement of the full active lifting force of the boom 2 ensures.
  • the hydropneumatic accumulator closes at the same time 4 and its pressure does not exceed the value of the balancing pressure, this compensation pressure even in the highest position of the boom 2 in the piston chambers 32 and 52 can be reached by means of the working cylinders.
  • the embodiment having the throttle element 15 is suitable for loading machines with relatively high requirements in terms of active lifting power of the boom and for so-called sinking systems of hydraulic excavators with low and irregular lifting frequency of the boom. Also suitable the embodiment according to FIG. 2 particularly when used on machines with high requirements with regard to the active lowering force of the work organ.
  • FIGS. 3 and 4 Another particularly advantageous embodiment of the invention
  • the device is shown in FIGS. 3 and 4, but only partially Play relevant circuit.
  • the cartridge valve shown there or seat valve without seal has an area ratio of 1:12.
  • Around To obtain an optimal solution is the rod-side volume of the piston spaces 31 and 51 designed larger than the volume of the working cylinder on the Piston side 32 or 52. Care is preferably taken here that the free ring area of two working cylinders is larger than the loadable Piston area of a cylinder.
  • the pressure relay shown in Figure 3 or the pressure switch 63 is from to a pilot control device via line 40 and has one Branch 41 to the second control block of the machine.
  • the second control block has a return line 42 coming from the piston rod space, which is connected to the hydraulic system 43 of the machine, which has at least has a feed pump for the fluid and a tank drain.
  • the second Control block 44 is connected to the hydraulics 43 and to the communicating connection switched between the piston rod spaces 31 and 51.
  • a return 45 of the first control block is shown at the top right in FIG.
  • At least one further control block 45 connected to a feed pump and one Tank is connected is also to the piston chamber 52 of the working cylinder 5th connected.
  • the embodiment shown in Figure 3 is special suitable for pressure differences of 100 to 300 bar, the another embodiment according to Figure 4 is particularly suitable for pressure differences from 180 to 300 bar.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Civil Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Mining & Mineral Resources (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Centrifugal Separators (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
  • Lasers (AREA)
  • Operation Control Of Excavators (AREA)
EP92924657A 1991-12-04 1992-12-03 Vorrichtung zur rückgewinnung von energie Expired - Lifetime EP0615583B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CS913680A CZ279137B6 (cs) 1991-12-04 1991-12-04 Zařízení pro rekuperaci polohové energie praco vního zařízení stavebního, nebo zemního stroje
CS3680/91 1991-12-04
PCT/EP1992/002797 WO1993011363A1 (de) 1991-12-04 1992-12-03 Vorrichtung zur rückgewinnung von energie

Publications (2)

Publication Number Publication Date
EP0615583A1 EP0615583A1 (de) 1994-09-21
EP0615583B1 true EP0615583B1 (de) 1998-03-18

Family

ID=5377577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92924657A Expired - Lifetime EP0615583B1 (de) 1991-12-04 1992-12-03 Vorrichtung zur rückgewinnung von energie

Country Status (11)

Country Link
US (1) US5477677A (cs)
EP (1) EP0615583B1 (cs)
JP (1) JP3231771B2 (cs)
AT (1) ATE164209T1 (cs)
CZ (1) CZ279137B6 (cs)
DE (1) DE59209243D1 (cs)
DK (1) DK0615583T3 (cs)
ES (1) ES2113443T3 (cs)
GR (1) GR3026601T3 (cs)
SK (2) SK368091A3 (cs)
WO (1) WO1993011363A1 (cs)

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US4738101A (en) * 1985-10-11 1988-04-19 Kubik Philip A Fluid system having a hydraulic counterbalance system
DE3602362A1 (de) * 1986-01-27 1987-07-30 Man Nutzfahrzeuge Gmbh Ventilanordnung fuer einen hydraulischen druckspeicher
JPH0662269B2 (ja) * 1989-04-21 1994-08-17 株式会社神戸製鋼所 移動式クレーンの変位抑制装置
DE4031808A1 (de) * 1990-10-08 1992-04-09 Volkswagen Ag Anordnung zur ansteuerung eines stellmotors sowie verfahren zur ansteuerung eines stellmotors
DE4129509C2 (de) * 1991-09-05 1994-06-16 Rexroth Mannesmann Gmbh Hydraulische Steueranordnung für Baumaschinen

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JP3231771B2 (ja) 2001-11-26
CZ279137B6 (cs) 1995-01-18
ATE164209T1 (de) 1998-04-15
SK368091A3 (en) 1994-05-11
JPH07504723A (ja) 1995-05-25
SK66094A3 (en) 1994-11-09
DE59209243D1 (de) 1998-04-23
ES2113443T3 (es) 1998-05-01
CZ368091A3 (en) 1993-06-16
US5477677A (en) 1995-12-26
WO1993011363A1 (de) 1993-06-10
EP0615583A1 (de) 1994-09-21
DK0615583T3 (da) 1999-01-11
GR3026601T3 (en) 1998-07-31

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