WO2004040065A1 - Dämpfungsvorrichtung - Google Patents
Dämpfungsvorrichtung Download PDFInfo
- Publication number
- WO2004040065A1 WO2004040065A1 PCT/DE2003/003110 DE0303110W WO2004040065A1 WO 2004040065 A1 WO2004040065 A1 WO 2004040065A1 DE 0303110 W DE0303110 W DE 0303110W WO 2004040065 A1 WO2004040065 A1 WO 2004040065A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- damping device
- hydraulic
- pressure
- space
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
-
- 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
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
-
- 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
- F15B1/021—Installations or systems with accumulators used for damping
-
- 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
- F15B15/17—Characterised by the construction of the motor unit of the straight-cylinder type of differential-piston type
-
- 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
- F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
- F15B7/005—With rotary or crank input
- F15B7/006—Rotary pump input
Definitions
- the invention relates to a damping device, in particular for cable-supported structures such.
- damping device is understood to mean a hydraulic linear axis for semi-active or active damping, in which essentially only control energy is entered.
- the effect of known passive dampers on the cover vibrations is not satisfactory.
- Active damping devices on the other hand, especially provided in the end abutments of the stay cables, bring about a significant reduction in the vibration amplitude.
- the known designs have a considerable energy consumption.
- the object of the present invention is to provide a damping device which has an improved response and thus damping behavior with a minimal energy requirement and a reduced overall size of the actuator and which allows the use of inexpensive sensors.
- the damping device has a differential cylinder, two hydraulic machines with adjustable swivel angles, an electric motor assigned to the hydraulic machines, a hydraulic accumulator and a tank.
- a hydraulic machine is arranged in the pressure medium flow path between the tank and an annular space on the piston rod side, and the second hydraulic machine is positioned in the pressure medium flow path between the annular space and a cylinder space of the differential cylinder.
- displacement machines with a constant absorption volume can also be used.
- the variable volume flow required for the desired cylinder speed is then achieved by means of a variable-speed electric motor.
- the electric motor is basically only necessary to put the damping device into operation with low vibration excitation, to specify the speed, or to make the excess power usable as electricity or to compensate for frictional losses.
- the differential cylinder is mounted in a stationary manner via its piston on an end abutment of a cable-stayed bridge, its cylinder jacket being displaceable in the longitudinal direction of the piston.
- a stay cable of the stay cable bridge is attached to the cylinder jacket, so that by appropriate control of the differential cylinder, the vibrations acting in the structure or the dynamic forces thereby acting in the stay cable are damped by a longitudinal displacement of the cylinder jacket - in accordance with the damping law, whereby uncontrolled tensions within the structure can be avoided ,
- the longitudinal displacement of the cylinder jacket as a result of external loads is made possible by adjusting the swivel angle of the hydraulic machines.
- the swivel angles are adjustable so that the speed with the cylinder jacket moves is proportional to the external loads. This means that large loads cause large swivel angles, so that high pressure medium volume flows can be realized, while small loads require small swivel angles, so that low pressure medium volume flows are possible.
- the cylinder jacket of the differential cylinder is mounted in a stationary manner and the piston of the differential cylinder is guided in an axially displaceable manner.
- the swivel angle or delivery volume is set as a function of a pressure signal from a pressure transducer arranged in the annular space or cylinder space.
- a further embodiment provides a pressure sensor in the cylinder space and / or in the area of the hydraulic accumulator for measuring and adapting the hydraulic accumulator pressure and the hydraulic accumulator charge to the respective static load.
- the hydraulic accumulator is integrated in the differential cylinder, so that a compact design is realized.
- the annular space of the differential cylinder is relative to the environment and / or sealed the cylinder space via a gap seal, which is formed via an annular gap between the piston-side and the cylinder jacket-side surfaces.
- the annular gap for sealing the annular space from the outside environment opens into a leakage connection, at least one sealing element being provided beyond the leakage connection for sealing the annular gap from the atmosphere.
- FIG. 1 shows a schematic view of a cable-stayed bridge
- FIG. 2 shows a longitudinal section through an embodiment according to the invention with an external hydraulic accumulator
- Figure 3 shows a longitudinal section through an embodiment of the invention with a hydraulic accumulator integrated in the differential cylinder and
- FIG. 4 shows a longitudinal section through a differential cylinder with gap seals according to the invention.
- Figure 1 shows a cable-stayed bridge 2 with a carriageway 4 which is supported by main girders 6.
- the carriageway 4 is suspended on stay cables 8 which are supported by the main girders 6.
- the stay cables 8 are supported by damping devices 10 on end abutments 12 of the roadway 4, so that cover vibrations can be damped.
- FIG. 2 shows a longitudinal section through a preferred embodiment of a damping device 10.
- the damping device 10 has a differential cylinder 14, two hydraulic machines 22, 24, an electric motor 26, a hydraulic accumulator 42 and a tank 20.
- the differential cylinder 14 has a stepped piston 16 which divides the space formed by the cylinder jacket 18 into two pressure spaces - an annular space 32 on the piston rod side and a cylinder space 34.
- the piston 16 of the differential cylinder 14 is fixedly mounted on the end abutment 12 via its radially stepped down part 28 - hereinafter referred to as the piston rod - so that a stroke movement takes place via a longitudinal displacement of the cylinder jacket 18. Due to the hydraulic clamping of the piston 16 on both sides, pressure medium is displaced from the one pressure chamber 32, 34 with each stroke movement and conveyed into the other pressure chamber 34, 32, with missing or excess pressure medium volumes being compensated for by the tank 20.
- the stay cable 8 engages on the cylinder jacket 18, so that the pretensioning of the stay cable 8 is predetermined via the pressures prevailing in the annular space 32 and cylinder space 34.
- the first hydraulic machine 22 is arranged in a first working line 36 between the low-pressure side tank 20 and the high-pressure side annular space 32, it being connected to the electric motor 26. It has an adjustable delivery volume and can be used as a pump or motor.
- the second hydraulic machine 24 is arranged in a second working line 38 between the high-pressure side annular space 32 and the high-pressure side cylinder space 34, the second working line 38 preferably opening into the first working line 36.
- the second hydraulic machine 24 also has an adjustable delivery volume, is also connected to the electric motor 26 and can be used as a pump or motor.
- Both hydraulic or displacement machines 22, 24 convey in two directions during the vibration damping, the first hydraulic machine 22 being resistant to high pressure on only one side, i.e. on the annulus side and low pressure is present on the other side, i.e. on the tank side, while the second hydraulic machine 24 is highly pressure-resistant on both sides, i.e. on the annulus side and on the cylinder space side, and the direction of the pressure difference can also be reversed in accordance with 4-quadrant operation.
- the delivery volumes of the hydraulic machines 22, 24 can be set as a function of the signal from a load cell 40.
- the load cell 40 is arranged in the area of the stay cable 8-cylinder jacket 18 connection and is assigned to a control circuit of the hydraulic machines 22, 24. It detects the loads acting on the stay cable 8 and forwards the tensile stresses or tensile forces detected thereby to the control loop, so that it depends on the swivel angle of the hydraulic machines 22, 24 adjusts these external loads.
- Another embodiment provides that instead of the costly force measurement, the pressure prevailing in the annular space 32 or cylinder space 34 is used as the feedback variable of the control loop. This can be done, for example, via a pressure transducer (not shown) arranged in the annular space 32 or cylinder ram 34.
- a hydraulic accumulator 42 is provided, which is connected to the second working line 38 and the cylinder space 34 by means of a third working line 44, so that the pressure in the cylinder space 34 becomes largely independent of the cylinder stroke and the pre-set pressure always prevails.
- the accumulator charge and the regulation of the accumulator pressure of the hydraulic accumulator 42 can advantageously be achieved by mutually adjusting the delivery volumes of the hydraulic machines 22, 24.
- a pressure on ⁇ is contractor or pressure transmitter is provided which is preferably arranged in the hydraulic accumulator connection or in the working line 38 or in the cylinder chamber 34th
- the electric motor 26 is operatively connected to the two hydraulic machines 22, 24, whereby it can be used both as a drive for the hydraulic machines 22, 24 and can be driven in the form of a generator by the hydraulic machines 22, 24 and thus acts as a brake.
- the preset pressures in the pressure chambers 32, 34 can be set and the hydraulic accumulator 42 can be charged.
- the hydraulic energy generated by the first hydraulic machine 22 or the second hydraulic machine 24 can also be generated by switching the Electric motor 26 can be converted into electrical energy as a generator.
- the cylinder jacket 18 moves to the left in FIG. 1, so that the cylinder space 34 is reduced and the annular space 32 is enlarged.
- the pressure in the annular space 32 drops below the preset pressure (for example ⁇ 100 bar), while the pressure in the cylinder space 34 remains essentially unchanged (for example 200 bar) due to the balancing effect of the hydraulic accumulator 42.
- Pressure medium thus flows from the cylinder space 34 via the second hydraulic machine 24 into the annular space 32, the second hydraulic machine 24 being driven by the pressure medium flow and acting as a hydraulic motor.
- This drives the first hydraulic machine 22, so that this pressure medium delivers from the tank 20 into the annular space 32.
- the first hydraulic machine 22 thus acts as a pump.
- this further customer is the electric motor 26, which in this arrangement tion is operated as a generator and thus the excess hydraulic energy of the second hydraulic machine 24 is converted into electrical energy or acts as a brake.
- the first hydraulic machine 22 acts as a pump
- the second hydraulic machine 24 acts as a motor for the first hydraulic machine 22
- the electric motor 26 optionally acts as a generator, wherein a movement of the cylinder jacket 18 damping the bridge deck vibration is realized.
- the first hydraulic machine 22 acts as a motor for the second Hydromachine 24, the second hydromachine 24 as a pump, and the electric motor 26 optionally as a generator, a movement of the cylinder jacket 18 damping the bridge deck vibration being realized.
- a damping device 10 is created according to the invention, which functions in the prestressed state essentially without external energy supply.
- all the energy required to maintain or balance the pressures can be covered from the vibration energy in accordance with the design of the damping device 10 according to the invention.
- the hydraulic accumulator 42 is not arranged externally, but is integrated in the differential cylinder 14 with its accumulator 64.
- the cylinder jacket 18 is extended in this embodiment and delimits the memory 64, which is separated from the cylinder chamber 34 by a partition wall 46. To provide additional gas volume, this is connected to external expansion tanks 68.
- the partition wall 46 is acted upon by the pressure pH in the cylinder space 34 on the cylinder space side, so that it is axially displaced depending on the ratio between the gas pressure pG and the pressure pH and the pressure pH in the cylinder space 34 is largely constant in accordance with the laws of the state variables of the gas is held.
- Such an arrangement of the hydraulic accumulator 42 is particularly compact. Furthermore, the piping is simple since no pressure medium line between the hydraulic accumulator 42 and the cylinder space 34 is necessary.
- the differential cylinder 14 has a multi-part piston 16 and a cylinder jacket 18.
- the differential cylinder 14 has on the free end section 90 of its piston 16 a receptacle 72 for supporting the differential cylinder 14 on the end abutment 12 and on the cylinder jacket 18 a receptacle 70 for fastening a stay cable 8.
- the differential cylinder 14 has a stroke measuring device 76 which is arranged on the end face of the cylinder jacket 18 and is operatively connected to the piston 16.
- the piston 16 has an annular element 66 which is operatively connected to a rod-shaped element 78 arranged on the cylinder jacket 18.
- the annular element 66 changes its relative position in relation to the longitudinal axis of the rod-shaped element 78 when the cylinder jacket 18 is lifted, so that the stroke can be determined and a position control of the damping device 10 can be implemented.
- the annular space 32 (detail x) extends radially between a piston section 52 and an opposite cylinder jacket section 112 and is axially through opposite end faces 92, 94 a sliding sleeve 96 arranged on the cylinder jacket 18 and a spacer sleeve arranged on the received end section 98 of the piston 16 100 limited. It is connected via radial bores 102, which open into an axial pressure channel, not shown, to a pressure connection 104 for connecting the first working line 36 or the hydraulic machines 22, 24.
- a leakage connection 60 is provided in the cylinder jacket 18 in the region of the sliding sleeve 96.
- the cylinder space 34 extends radially over the entire inner diameter of the cylinder jacket 18 and is axially delimited by opposite end faces 86, 88 of the cylinder jacket 18 and the piston 16. It is connected via a pressure sleeve 106 arranged in the piston 16 to a pressure connection 108 for connecting the second working line 38 or the second hydraulic machine 24 and the hydraulic accumulator 42.
- the sealing of the annular space 32 according to the invention from the external environment 62 and the cylinder space 34 is realized via gap seals 48, 82 in the form of annular gaps 58, 84.
- the annular gap 58 for sealing the annular space 32 from the external environment 62 is formed between the inner circumferential surface 54 of the sliding sleeve 96 and the respective outer circumferential section 50 of the piston 16.
- the annular gap 58 opens into a leak connection 60.
- the annular gap 84 for sealing the annular space 32 from the cylinder space 34 is formed between the outer peripheral surface 52 of the spacer sleeve 100 and the respective opposite inner peripheral portion 112 of the cylinder jacket 18.
- annular gaps 58, 84 In order to achieve a sufficient tightness and a sufficiently large pressure reduction via the annular gaps 58, 84, these must be designed to be radially narrow and axially long.
- radial sealing elements or wipers 80, 110 are provided, which seal the annular gap 58 with respect to the external environment 62. Due to the small pressure gradient between the pressure of the external environment 62 and the pressure of the pressure medium in the area of the leak connection 60, only low-pressure seals 80, 110 are necessary. In addition to dispensing with high-pressure seals for sealing the annular space 32, it is particularly positive about the gap seals 48, 82 according to the invention that the friction between opposite piston-side surfaces 50, 54 and cylinder jacket-side surfaces 52, 56 is reduced, so that such a differential cylinder 14 has a better response than has comparable differential cylinder 14 with conventional seals.
- a damping device in particular for cable-supported structures such.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Bridges Or Land Bridges (AREA)
- Surgical Instruments (AREA)
- Noodles (AREA)
- Seal Device For Vehicle (AREA)
- Fluid-Damping Devices (AREA)
- Vehicle Body Suspensions (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/530,570 US20060011370A1 (en) | 2002-10-28 | 2003-09-18 | Damping device |
EP03753313A EP1556551B1 (de) | 2002-10-28 | 2003-09-18 | Dämpfungsvorrichtung |
DE50308289T DE50308289D1 (de) | 2002-10-28 | 2003-09-18 | Dämpfungsvorrichtung |
JP2004547384A JP4481171B2 (ja) | 2002-10-28 | 2003-09-18 | 制動装置 |
AU2003271539A AU2003271539A1 (en) | 2002-10-28 | 2003-09-18 | Damping device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10250207.2 | 2002-10-28 | ||
DE10250207A DE10250207A1 (de) | 2002-10-28 | 2002-10-28 | Dämpfungsvorrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004040065A1 true WO2004040065A1 (de) | 2004-05-13 |
Family
ID=32103132
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/003110 WO2004040065A1 (de) | 2002-10-28 | 2003-09-18 | Dämpfungsvorrichtung |
Country Status (8)
Country | Link |
---|---|
US (1) | US20060011370A1 (de) |
EP (1) | EP1556551B1 (de) |
JP (1) | JP4481171B2 (de) |
KR (1) | KR20050065622A (de) |
AT (1) | ATE374287T1 (de) |
AU (1) | AU2003271539A1 (de) |
DE (2) | DE10250207A1 (de) |
WO (1) | WO2004040065A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102305262A (zh) * | 2011-06-17 | 2012-01-04 | 靳阳 | 能量收集式减振器及其实现方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004028477A1 (de) * | 2004-06-11 | 2005-12-29 | Georg Piontek | Mechanischer Energie - Transformator |
WO2011085184A1 (en) * | 2010-01-08 | 2011-07-14 | University Of Connecticut | Smart vibration absorber for traffic signal supports |
DE102012017004A1 (de) * | 2012-08-28 | 2014-03-06 | Hydac Technology Gmbh | Hydraulisches Energierückgewinnungssystem |
CN113612180B (zh) * | 2021-07-27 | 2023-06-16 | 福州维思电力勘察设计有限公司 | 一种高压线防风装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3259932A (en) * | 1963-03-06 | 1966-07-12 | Cie D Ingenierus Et Technicien | Cable-stayed bridge |
FR2380449A1 (fr) * | 1977-02-12 | 1978-09-08 | Orenstein & Koppel Ag | Dispositif de commande comportant un cylindre differentiel raccorde a un circuit hydraulique ferme |
JP2001241403A (ja) * | 2000-02-29 | 2001-09-07 | Kayaba Ind Co Ltd | 油圧制御装置 |
WO2002004820A1 (fr) * | 2000-07-10 | 2002-01-17 | Kobelco Construction Machinery Co., Ltd. | Circuit de verin hydraulique |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3244191C2 (de) * | 1982-11-30 | 1985-07-25 | Mannesmann Rexroth GmbH, 8770 Lohr | Mit einer Konstantzugregelung versehener hydraulischer Zylinder |
JPS59151833U (ja) * | 1983-03-31 | 1984-10-11 | 日野自動車株式会社 | 車輌の振動エネルギ−変換装置 |
US4979595A (en) * | 1989-02-14 | 1990-12-25 | Paton H N | Fluid actuated friction damper |
JPH0639317B2 (ja) * | 1989-09-09 | 1994-05-25 | 株式会社神戸製鋼所 | 移動式クレーンの変位抑制機構 |
JPH0647672U (ja) * | 1992-12-02 | 1994-06-28 | 勝好 榛村 | 橋梁振動発電装置 |
WO1994020768A1 (en) * | 1993-03-03 | 1994-09-15 | Paton H N | Fluid actuated friction damper |
JPH08109939A (ja) * | 1994-10-13 | 1996-04-30 | Mitsubishi Heavy Ind Ltd | 油圧式ダンパ |
JP3035455B2 (ja) * | 1994-11-02 | 2000-04-24 | カヤバ工業株式会社 | 制振装置用油圧アクチュエータ |
NL1002430C2 (nl) * | 1996-02-23 | 1997-08-26 | Innas Free Piston Ifp Bv | Inrichting voor het opwekken, gebruiken of transformeren van hydraulische energie. |
US5706919A (en) * | 1996-07-29 | 1998-01-13 | General Motors Corporation | Alternating state pressure regulation valved damper |
US5810125A (en) * | 1996-09-19 | 1998-09-22 | Stidd Systems, Inc. | Active shock-absorbing seating system |
US5947240A (en) * | 1997-02-03 | 1999-09-07 | Honeywell, Inc. | Load vibration isolation apparatus |
US5988330A (en) * | 1997-07-03 | 1999-11-23 | Morris; Jay | Adjustable shock absorber |
JP3903596B2 (ja) * | 1998-06-08 | 2007-04-11 | 鹿島建設株式会社 | 振動エネルギー変換・供給型橋梁制振構造物 |
DE19831624A1 (de) * | 1998-07-15 | 2000-01-20 | Mueller Weingarten Maschf | Hydraulischer Antrieb für eine Presse |
US6216456B1 (en) * | 1999-11-15 | 2001-04-17 | Caterpillar Inc. | Load sensing hydraulic control system for variable displacement pump |
FR2821654B1 (fr) * | 2001-03-02 | 2003-09-05 | Jarret Soc | Amortisseur ou limiteur d'efforts en particulier pour ouvrages de genie civil |
-
2002
- 2002-10-28 DE DE10250207A patent/DE10250207A1/de not_active Withdrawn
-
2003
- 2003-09-18 AT AT03753313T patent/ATE374287T1/de active
- 2003-09-18 DE DE50308289T patent/DE50308289D1/de not_active Expired - Lifetime
- 2003-09-18 JP JP2004547384A patent/JP4481171B2/ja not_active Expired - Lifetime
- 2003-09-18 EP EP03753313A patent/EP1556551B1/de not_active Expired - Lifetime
- 2003-09-18 US US10/530,570 patent/US20060011370A1/en not_active Abandoned
- 2003-09-18 AU AU2003271539A patent/AU2003271539A1/en not_active Abandoned
- 2003-09-18 KR KR1020057006972A patent/KR20050065622A/ko not_active Application Discontinuation
- 2003-09-18 WO PCT/DE2003/003110 patent/WO2004040065A1/de active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3259932A (en) * | 1963-03-06 | 1966-07-12 | Cie D Ingenierus Et Technicien | Cable-stayed bridge |
FR2380449A1 (fr) * | 1977-02-12 | 1978-09-08 | Orenstein & Koppel Ag | Dispositif de commande comportant un cylindre differentiel raccorde a un circuit hydraulique ferme |
JP2001241403A (ja) * | 2000-02-29 | 2001-09-07 | Kayaba Ind Co Ltd | 油圧制御装置 |
WO2002004820A1 (fr) * | 2000-07-10 | 2002-01-17 | Kobelco Construction Machinery Co., Ltd. | Circuit de verin hydraulique |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 26 1 July 2002 (2002-07-01) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102305262A (zh) * | 2011-06-17 | 2012-01-04 | 靳阳 | 能量收集式减振器及其实现方法 |
Also Published As
Publication number | Publication date |
---|---|
JP4481171B2 (ja) | 2010-06-16 |
JP2006504014A (ja) | 2006-02-02 |
US20060011370A1 (en) | 2006-01-19 |
DE10250207A1 (de) | 2004-05-13 |
KR20050065622A (ko) | 2005-06-29 |
EP1556551B1 (de) | 2007-09-26 |
AU2003271539A1 (en) | 2004-05-25 |
DE50308289D1 (de) | 2007-11-08 |
EP1556551A1 (de) | 2005-07-27 |
ATE374287T1 (de) | 2007-10-15 |
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