EP0897480B1 - Vorrichtung zur energieeinsparung - Google Patents

Vorrichtung zur energieeinsparung Download PDF

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Publication number
EP0897480B1
EP0897480B1 EP97915466A EP97915466A EP0897480B1 EP 0897480 B1 EP0897480 B1 EP 0897480B1 EP 97915466 A EP97915466 A EP 97915466A EP 97915466 A EP97915466 A EP 97915466A EP 0897480 B1 EP0897480 B1 EP 0897480B1
Authority
EP
European Patent Office
Prior art keywords
piston
fluid
space
housing
pistons
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
EP97915466A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0897480A1 (de
Inventor
Jürgen MARKWART
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 EP0897480A1 publication Critical patent/EP0897480A1/de
Application granted granted Critical
Publication of EP0897480B1 publication Critical patent/EP0897480B1/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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • F15B2201/312—Sealings therefor, e.g. piston rings
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/32—Accumulator separating means having multiple separating means, e.g. with an auxiliary piston sliding within a main piston, multiple membranes or combinations thereof
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid ports having valve means
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports
    • F15B2201/4155—Gas ports having valve means

Definitions

  • the invention relates to a device for saving energy in hydraulic actuatable tools with a piston accumulator.
  • US-A-2,721,446 is an actuator for a hydraulic actuated working cylinder known, which otherwise has the features of the preamble of claim 1.
  • Hydraulic pump becomes a constant supply for the hydraulic working cylinder manufactured in the event of their malfunction and interruption in the sense of an emergency supply the piston accumulator with two longitudinally movable pistons over the preloaded Gas pressure in the prestressing chamber is the further hydraulic supply for the Ensures working cylinder and causes it to extend.
  • the one on the opposite Provided end of the biasing space of the known Piston accumulator leads to the outside via a ventilation opening.
  • the invention is based on the object a device for saving energy in hydraulically actuated work equipment to create, with advanced uses that the does not have the disadvantages described above.
  • a related task solves one Device with the features of claim 1.
  • the surrounding space also connected to the hydraulic work equipment is like the fluid space provided with the filling medium, and that the other fluid space via a switchable fluid control to the hydraulic pump connected, allow the pistons of the piston accumulator to be positively coupled with a direction of travel with a decreasing preload space an increase in the internal gas pressure, which decreases in the sense of relaxation, as soon as the pistons move in the other direction with an enlargement of the Move the volume of the prestressing space.
  • the one enclosed in the leader room The amount of gas thus forms a kind of energy storage comparable to a mechanical spring and the kinetic energy introduced into the memory by the movement can be called up again by pressing the switchable fluid control. Because the surrounding space of the piston accumulator in addition fluid-carrying are unwanted, due to compression processes Avoiding heating and the respective amounts of fluid to be controlled Carrying out a working stroke can be reduced, which is energetically favorable.
  • the piston accumulator used in the energy saving device belong to the family of hydraulic accumulators, including bladder accumulators and membrane memory belong.
  • One of the main tasks of this hydraulic accumulator is certain volume of a pressurized fluid in a hydraulic system record and return them to the system if necessary.
  • the Known piston accumulators consist of a liquid and a Gas part with a piston as a gas-tight separating element, the gas side with Nitrogen is filled.
  • the liquid side of the piston accumulator stands with the Hydraulic circuit in connection, so that when the pressure rises, the piston accumulator increasingly absorbs liquid and the gas on its gas side is compressed. When the pressure drops, the compressed gas expands and thereby displaces the stored hydraulic fluid in the hydraulic Circulation.
  • Piston accumulators can basically work in any position, a vertical arrangement with the gas side up is preferred, so that contamination from the liquid settles on the piston seals is avoided.
  • the piston accumulator does not have a flexible separating element in the form of a rubber membrane or rubber bladder, but rather a rigid piston that is hardly subject to wear and as in the device according to the invention can also work without fail over very long periods of time.
  • the energy saving device does not need to be limited to working machines to be, but can also be used in hydraulic braking systems, in elevators and hydraulic motors or the like. Find use. In these cases it is beneficial to achieve a low spring rate large volume for the prestressing space. To achieve this, it can be provided that the prestressing space is connected to a further gas supply device, especially in the form of a nitrogen storage as a buffer.
  • the piston accumulator according to FIG. 2 has a reference number 10 as a whole Housing on.
  • the housing 10 is designed in the form of a cylinder tube, can also form other cross-sectional shapes (square, elliptical).
  • Two longitudinally displaceable pistons 12, 14 are arranged in the housing 10 via a coupling part in the form of a solid coupling rod 16 are interconnected.
  • the coupling rod 16 is longitudinally movable in one Partition 18 of the housing 10 out, which is in the manner of a cylindrical Intermediate section of the housing 10 is formed and with the two adjacent fluid pistons 12, 14 delimit two fluid spaces 20, 22.
  • the circumferential one Partition 18 corresponding round seals 24.
  • the housing 10 is delimited at the end by two end walls 26, 28 which cover the closure cover of the piston accumulator. Between the view towards Fig.2 seen left end wall 26 and the adjacent opposite Piston 12 is limited by these parts, a biasing chamber 30, the a predeterminable gas internal pressure is assigned.
  • the coupling rod 16 is of solid construction and is fixed at the end by means of screws 32 System with the respectively assigned pistons 12, 14.
  • the pistons 12, 14 point in known training corresponding outer seals on the outer circumference on.
  • the partition 18 is part of a tubular center connector 34 to which the housing tubes 36 of the housing 10 join on both sides, which the Serve longitudinal guidance of the pistons 12, 14.
  • connection points 40 and 42 extend in the central connection piece 34, which open into the respectively assigned fluid space 20 or 22.
  • the cross section and viewed in the direction of Fig.1 in the direction of the longitudinal axis 38 H-shaped center connector 34 is at both ends via one Sealing ring 44 in the two housing tubes 36 and the fluid spaces 20, 22 from sealing the environment.
  • the two end walls also point 26, 28 each have a sealing ring 46 on the outer circumference.
  • end sleeves 50 are used each screwed into the free ends of the two housing tubes 36 Hold the mentioned end walls 26, 28 in their position shown in FIG.
  • the respective connection point 40, 42 opens into a cylindrical one Cross channel 52 of the coupling rod 16 in each position of the Piston 12,14 is penetrated and parallel to the longitudinal axis 38 of the piston accumulator runs.
  • the two pistons 12 and 14 have a hollow cylindrical center recess 56 on.
  • a gas supply device see Fig. 1
  • the housing 10 limits its two housing tubes 36 the fluid spaces 20, 22 on the outer circumference.
  • the biasing chamber 30 is filled with a working gas, for example in the form of Nitrogen, filled and assigned an internal gas pressure.
  • a working gas for example in the form of Nitrogen
  • the sealing plug not shown be provided with a valve device 68 (see Fig. 1) which blocks the gas passage allowed in the direction of the bias chamber 30, in the sense of a check valve but blocked the exit.
  • the gas located in the prestressing space 30 with predeterminable Gas pressure therefore forms a kind of gas or pressure cushion with, if one uses a mechanical comparison model, more predetermined Spring constant.
  • the pressure pad addressed thus forms in the sense of mechanical Comparative model a kind of compression spring. Take the two Piston 12, 14 seen in the direction of FIG.
  • the piston 12 abuts the facing end of the Center connector 34 and the piston 14 comes into contact with the end wall 28. Since the surrounding space 54 is connected to the supply line 66 is, the amount of fluid stored in the surrounding space 54 is in the Supply line 66 pushed out. In the relevant final position takes then the prestressing space 30 has its largest volume and the fluid space 22, which can be filled with a fluid via the connection point 42. The fluid space 20, then takes its lowest volume and the gas pressure inside in the prestressing space 30 is due to the volume increase of the prestressing space 30 then reduced, which is the relaxation in the mechanical model equal to the compression spring.
  • the volume of the prestressing space then decreases in the opposite direction of movement 30 and the fluid space 22 and the fluid space 20, takes its maximum possible volume.
  • the gas in the prestressing chamber 30 is then accordingly compressed and pre-stressed, which is the tensioning of a mechanical Feather equals.
  • the gas or spring energy stored in this way can then be called up to a hydraulic, which will be explained in more detail Work equipment or the like to operate in a supportive manner.
  • the two-piston arrangement shown can optionally be used for other control processes even more pistons (not shown) are used, which if necessary the number of fluid spaces as well as the prestressing spaces and others Gas rooms increased.
  • Several piston accumulators could also be connected in series or interconnected in parallel.
  • FIG Device shows the use of the piston accumulator according to FIG Device for saving energy in hydraulically actuated work equipment in the form of two hydraulic working cylinders 70.
  • the two hydraulic cylinders 70 are equivalent to one via their respective piston rods 72
  • Boom 74 connected, for example in the form of a crane or excavator arm.
  • the boom 74 can, however, also represent a lifting platform such as this is used for goods and passenger lifts as well as lifting platforms, provided that these can be moved with hydraulic cylinders.
  • a suitably trained hydraulic motor can also be used, to operate a work tool.
  • the two Hydraulic working cylinder 70 also only one working cylinder for moving the Cantilever 74 can be provided, but this is associated with lower savings.
  • the two hydraulic cylinders 70 are on the rod side via a connecting line 76 jointly connected to a fluid control 78 in a fluid-carrying manner, for example a controllable valve unit in the form of directional valves or the like. can have.
  • a fluid-operated control is also connected to the fluid control 78 Hydraulic pump 80 connected and a tank line 82 for the tank 84.
  • the fluid control 78 has a further fluid-carrying connecting line 86, which opens into the second connection point 42.
  • the first Connection point 40 of the fluid space 20 is in the embodiment shown in FIG connected to the supply line 66 and therefore via this Supply line 66 in connection with the surrounding space 54.
  • the fluid space 20 is included Hydraulic fluid is filled and, like the supply line 66, is above a Secondary branch 66a with the hydraulic work tool in the form of the two Hydraulic cylinder 70 in fluid communication.
  • the ones to be controlled can also be controlled Reduce fluid quantities to perform a working stroke.
  • the supply line 66 and the secondary branch 66a open out as shown 1 in a further fluid-carrying connecting line 88, which is located in Direction of the hydraulic cylinder 70 and the on the piston sides 90 to the Hydraulic cylinder 70 is connected.
  • the energy saving device is now set such that at a middle load or boom position of the boom 74 in the biasing space 30 increased, maximum possible internal gas pressure prevails, that of a biased mechanical compression spring corresponds. If the boom 74 is now to be lifted, So moving in the direction of view of Fig.1, the Hydraulic pump 80 switched on and fluid arrives via the fluid control 78 under pressure via the connecting line 86 and the second connection point 42 into the fluid chamber 22, the pistons being viewed in the direction of view of FIG Move 12 and 14 to the right.
  • Hydraulic energy is stored in the pretensioning space 30 then when the boom 74 is lowered, this being stored on the piston side 90 Fluid is returned to the fluid space 20 and the surrounding space 54 with the result that seen in the direction of Fig.1 Move pistons 12 and 14 to the left and the preload in the preload chamber 30 increases.
  • the gas supply device can 62 in the form of the nitrogen storage shown. Should however, for example because the boom 74 is a lifting platform acts, the spring constant to be reduced over longer travels
  • the chamber volume becomes a uniform energy output of the biasing space 30 increased by the connection of the memory 62. Further becomes by switching the fluid control 78 on the rod side of the hydraulic cylinder 70 filled via the hydraulic pump 80 under pressure, which is the lowering process facilitates as well as the increase in gas pressure in the prestressing space 30.
  • FIG 3 shows a further piston accumulator, which, like the piston accumulator design according to Figure 2 is suitable for an energy saving device to be used according to the circuit diagram of Fig.1.
  • the same components of the piston accumulator according to Figure 3 with the same reference numerals but increased by 100 as described above according to the Representation according to Fig.2 are described. That for the embodiment after the figure 2 applies accordingly to the embodiment of the piston accumulator according to Figure 3, which is described in the following only insofar as it differs significantly from the above-described embodiment according to FIG different.
  • the end walls 126, 128 are in one piece formed and screwed to the inside of the housing tubes 136 each.
  • the connection points 140, 142 open in one direction, i.e. 3 looking down from the inside of the housing 110 out.
  • the two-part partition 118 again has the character a hollow cylindrical intermediate piece 134 and interlocks with each other a, the fixed connection realized via a screw connection 192 is the flange-like widenings of the two-part partition intermediate piece be upheld.
  • they are in the pistons 112, 114 made cylindrical center recesses 156 coaxial to the longitudinal axis 138 arranged and facing each other. There is therefore an increase in volume of fluid spaces 120 and 122 take place.
  • Both embodiments of a piston accumulator both according to Fig.2 and as 3 also essentially show a central axis and its axis Longitudinal axis 38, 138 a symmetrical arrangement of parts, which allows it to be inexpensive in a large number the piston accumulator as an inexpensive standard component to manufacture and offer.

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  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Confectionery (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Optical Head (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP97915466A 1996-05-04 1997-03-29 Vorrichtung zur energieeinsparung Expired - Lifetime EP0897480B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19617950A DE19617950A1 (de) 1996-05-04 1996-05-04 Kolbenspeicher mit Gasvorspannung
DE19617950 1996-05-04
PCT/EP1997/001613 WO1997042417A1 (de) 1996-05-04 1997-03-29 Vorrichtung zur energieeinsparung

Publications (2)

Publication Number Publication Date
EP0897480A1 EP0897480A1 (de) 1999-02-24
EP0897480B1 true EP0897480B1 (de) 2002-07-17

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Application Number Title Priority Date Filing Date
EP97915466A Expired - Lifetime EP0897480B1 (de) 1996-05-04 1997-03-29 Vorrichtung zur energieeinsparung

Country Status (8)

Country Link
US (1) US6266959B1 (cs)
EP (1) EP0897480B1 (cs)
JP (1) JP3857321B2 (cs)
AT (1) ATE220766T1 (cs)
CZ (1) CZ295658B6 (cs)
DE (2) DE19617950A1 (cs)
SK (1) SK284792B6 (cs)
WO (1) WO1997042417A1 (cs)

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EP2580439A1 (de) * 2010-06-09 2013-04-17 Robert Bosch GmbH Druckausgleichsvorrichtung für hydrauliksysteme
DE102012009668B3 (de) * 2012-05-03 2013-08-14 Hydac Technology Gmbh Vorrichtung zur Energieeinsparung bei hydraulisch betätigbaren Arbeitsgerätschaften
DE102012009669B3 (de) * 2012-05-03 2013-08-14 Hydac Technology Gmbh Vorrichtung zur Energieeinsparung bei hydraulisch betätigbaren Arbeitsgerätschaften
DE102012009670A1 (de) 2012-05-03 2013-11-07 Hydac Technology Gmbh Vorrichtung zur Energieeinsparung bei hydraulisch betätigbaren Arbeitsgerätschaften
DE102013006204A1 (de) 2013-04-04 2014-10-09 Sennebogen Maschinenfabrik Gmbh Betätigungseinrichtung und Arbeitsgerätschaft mit einer solchen Betätigungseinrichtung
DE102013013690A1 (de) 2013-08-16 2015-02-19 Hydac Technology Gmbh System zur automatischen Anpassung einer vorgebbaren Gaseintragsmenge und Betätigungseinrichtung mit einem solchen System
CN105697434A (zh) * 2016-04-19 2016-06-22 赵永军 一种高效蓄能增压器

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US9080710B2 (en) 2011-01-21 2015-07-14 Hamilton Sundstrand Corporation Accumulator reservoir venting
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CN106996399A (zh) * 2017-05-19 2017-08-01 中冶赛迪技术研究中心有限公司 一种用于重力势能回收利用的三油口液压装置
CN106949119A (zh) * 2017-05-19 2017-07-14 中冶赛迪技术研究中心有限公司 一种用于重力势能回收利用的四油口液压装置
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2580439A1 (de) * 2010-06-09 2013-04-17 Robert Bosch GmbH Druckausgleichsvorrichtung für hydrauliksysteme
DE102012009668B3 (de) * 2012-05-03 2013-08-14 Hydac Technology Gmbh Vorrichtung zur Energieeinsparung bei hydraulisch betätigbaren Arbeitsgerätschaften
DE102012009669B3 (de) * 2012-05-03 2013-08-14 Hydac Technology Gmbh Vorrichtung zur Energieeinsparung bei hydraulisch betätigbaren Arbeitsgerätschaften
DE102012009670A1 (de) 2012-05-03 2013-11-07 Hydac Technology Gmbh Vorrichtung zur Energieeinsparung bei hydraulisch betätigbaren Arbeitsgerätschaften
WO2013164072A1 (de) 2012-05-03 2013-11-07 Hydac Technology Gmbh Vorrichtung zur energieeinsparung bei hydraulisch betätigbaren arbeitsgerätschaften
WO2013164073A1 (de) 2012-05-03 2013-11-07 Hydac Technology Gmbh Vorrichtung zur energieeinsparung bei hydraulisch betätigbaren arbeitsgerätschaften
WO2013164096A1 (de) 2012-05-03 2013-11-07 Hydac Technology Gmbh Vorrichtung zur energieeinsparung bei hydraulisch betätigbaren arbeitsgerätschaften
DE102013006204A1 (de) 2013-04-04 2014-10-09 Sennebogen Maschinenfabrik Gmbh Betätigungseinrichtung und Arbeitsgerätschaft mit einer solchen Betätigungseinrichtung
DE102013013690A1 (de) 2013-08-16 2015-02-19 Hydac Technology Gmbh System zur automatischen Anpassung einer vorgebbaren Gaseintragsmenge und Betätigungseinrichtung mit einem solchen System
CN105697434A (zh) * 2016-04-19 2016-06-22 赵永军 一种高效蓄能增压器

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JP3857321B2 (ja) 2006-12-13
SK148198A3 (en) 1999-03-12
JP2000509477A (ja) 2000-07-25
SK284792B6 (sk) 2005-11-03
ATE220766T1 (de) 2002-08-15
CZ295658B6 (cs) 2005-09-14
EP0897480A1 (de) 1999-02-24
WO1997042417A1 (de) 1997-11-13
DE19617950A1 (de) 1997-11-13
DE59707734D1 (de) 2002-08-22
CZ299298A3 (cs) 1998-12-16
US6266959B1 (en) 2001-07-31

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