[go: up one dir, main page]

WO2004027267A1 - Hydrotransformateur - Google Patents

Hydrotransformateur Download PDF

Info

Publication number
WO2004027267A1
WO2004027267A1 PCT/DE2003/001833 DE0301833W WO2004027267A1 WO 2004027267 A1 WO2004027267 A1 WO 2004027267A1 DE 0301833 W DE0301833 W DE 0301833W WO 2004027267 A1 WO2004027267 A1 WO 2004027267A1
Authority
WO
WIPO (PCT)
Prior art keywords
control
hydrotransformer
dead
displacers
displacer
Prior art date
Application number
PCT/DE2003/001833
Other languages
German (de)
English (en)
Inventor
Alexander Mark
Original Assignee
Bosch Rexroth Ag
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 Bosch Rexroth Ag filed Critical Bosch Rexroth Ag
Priority to US10/516,728 priority Critical patent/US20050166751A1/en
Publication of WO2004027267A1 publication Critical patent/WO2004027267A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/303—Control of machines or pumps with rotary cylinder blocks by turning the valve plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2042—Valves

Definitions

  • the invention relates to an HV transformer according to the preamble of patent claim 1.
  • a hydrotransformer is a unit in which an energy flow Q j _ xp ] _ is converted into an energy flow Q2 x P 2 by hydraulic coupling of a hydraulic motor and a pump. Only as much hydraulic energy is drawn from an existing pressure supply as is required to drive a consumer connected to the pump.
  • Such hydraulic transformers can be designed as radial piston machines, as axial piston machines or according to other kinematic functional principles, for example as vane machines.
  • No. 3,188,963 shows a hydrotransformer designed as a swashplate machine, in which displacers guided in a rotatable cylinder are supported on a fixed swashplate.
  • the angle of attack of the swash plate determines the piston stroke of the displacer.
  • the pressure medium supply and discharge takes place via a control disk with four control kidneys, one pair of control kidneys each being assigned to the motor or the pump.
  • US 3,079,864 discloses a hydrotransformer in wing cell construction.
  • a large number of displacers displaceable in the radial direction are mounted in a rotor and biased against a cam ring.
  • the pressure medium supply and discharge takes place in a manner similar to the solution described above via a control disk arranged on the end face.
  • the so-called INNAS hydrotransformer is known, in which the transmission ratio, that is to say the ratio between the inlet pressure and the pressure intended to supply the consumer, can be changed.
  • a control mirror is provided with three control kidneys, the position of which can be changed relative to the dead center positions of the displacers by turning relative to the swash plate of an axial piston machine.
  • the pressure should increase or decrease linearly over the entire control angle interval up to the subsequent pressure level. It showed that such a reversal behavior cannot be implemented over the entire operating range of the transformer.
  • the rigid changeover geometry can lead to cavitation and pressure peaks in the changeover areas, so that the above-described noise emissions and the mechanical load on the hydrotransformer are further increased.
  • the invention is based on the object of providing a hydrotransformer in which the load caused by pressure gradients in the changeover region is reduced.
  • the hydrotransformer has a large number of displacers, each of which is guided in a displacer space and which can be connected to a pressure, a consumer or a tank connection by means of a reversing device, the relative position of the reversing device being changeable relative to the dead center positions of the displacers is.
  • the oil volume of the displacement space to be reversed is increased during the reversal phase. This takes place in that the respective displacement space is connected to a changeover space in this changeover phase. This increase in oil volume significantly reduces the pressure gradients, pressure peaks and noise emissions in the changeover phase.
  • control device has three control recesses distributed around the circumference, the reversing spaces each opening in the area between two adjacent control recesses. It is particularly preferred if these control recesses are approximately kidney-shaped and the reversing spaces each open into one of the kidney dividers.
  • control kidneys and through bores of the reversing spaces are formed in a control mirror of the control device.
  • the reversing device preferably has a base body, in which a part of the reversing chamber that adjoins the through holes of the control mirror is formed.
  • each reversing space is greater than or at least equal to the displacement volume of a displacer.
  • volume of the reversing space should preferably be less than five times the displacement volume. However, this range can vary depending on
  • the hydraulic transformer according to the invention is preferably designed as an axial piston inclined axis unit. As already mentioned at the beginning, the invention can also be applied to other kinematic functional principles for hydrotransformers.
  • Figure 1 is a three-dimensional representation of a hydrotransformer in inclined axis design
  • FIG. 2 shows a front view of a control part of the hydrotransformer from FIG. 1;
  • Figure 3 is a three-dimensional representation of the control part of Figure 2 and
  • FIGS. 2 and 3 shows a longitudinal section through the control part from FIGS. 2 and 3.
  • FIG. 1 shows a three-dimensional basic illustration of a hydrotransformer 1, which is designed in an inclined axis construction.
  • a hydraulic transformer 1 can be represented as a combination of a hydraulic motor and a hydraulic pump, which are mechanically coupled to one another.
  • hydraulic transformers can be realized by adjustable displacement units, axial piston machines or vane-cell machines preferably being used.
  • any displacement unit can be used, in which the displacers can be controlled in such a way that they can be operatively connected in succession to three pressure levels - the supply pressure, the tank pressure and the consumer pressure (working pressure).
  • the hydraulic transformer 1 has an angular housing 2 in which displacers, a drive flange and a drive shaft are arranged in a cylinder drum.
  • a control housing 4 is attached to the angle housing 2 and is closed by a cover 5.
  • the pressure medium is supplied and discharged into and out of the cylinder chambers via a lower part in the control housing 4. brought control part 12, by the adjustment of the transmission ratio between the pump and motor can be changed.
  • the reversing device can be adjusted by means of an adjusting device, such as by means of an electric motor 6 or another suitable drive, for example a gear drive, with reference to the dead center positions of the displacers.
  • a working connection B, a tank connection T and a supply connection A are provided on the angle housing 2 and on the cover 5. These connections can be designed as axial or radial connections.
  • the control part 12 from FIGS. 2 to 4, which is rotatably mounted in the control housing 4, has a flange 14 on its outer circumference for the axial contact of a gearwheel, not shown.
  • the control part 12 can be adjusted with this gearwheel with reference to the dead center positions of the displacers.
  • the control part 12 has on the end face (view according to FIG. 2) a control mirror 16 which bears sealingly on the cylinder drum rotatably received in the angular housing 2.
  • the axially displaceable displacers supported on an inclined axis are guided in this cylinder drum.
  • the control mirror 16 is penetrated by three control kidneys 18, 20, 22 distributed around the circumference.
  • control mirror 16 is part of a base body 24, on the outer circumference of which the flange 14 is formed. Connection channels 26, 28, 30 are formed in the base body 24, via which the control kidneys 18, 20 and 22 are connected to the assigned pressure medium connections.
  • the control kidney 18 is via the connection channel 26 and radially opening channels 32 with the tank connection T, the control kidney 20 via the connection channel 28 and an inclined channel 36, which runs obliquely to the axis 34 of the control part 12, with the consumer or working connection B and the control kidney 22 connected to the supply connection A via three axially parallel bores 38.
  • the displacers can be pressurized at the tank connection T, at the working connection B or at the supply connection A.
  • the width of the kidney dividers 25 is selected such that a displacement space in the changeover phase between two adjacent control kidneys can be covered by the kidney separator web 25.
  • kidney dividers are closed, so that the displacement space is completely covered in the reversal phase.
  • the displacement spaces located in the area of the kidney dividers 25 are connected via the blind bores 23, 27 and 29 to the dead spaces 40, 42 and 44 shown in FIG. 3 in the reversal phase.
  • These are designed as axially and radially or obliquely positioned bore sections in the base body 24 and are shown in FIG. 3 for the sake of clarity outside the control part 12.
  • the geometry of the connection channels 26, 28, 30 described above and the dead spaces 40, 42, 44 separated therefrom depends on the geometry of the base body 24.
  • the dead space 44 is essentially one Centrally located, axially extending cavity is formed, which is connected to the blind bore 29 via a transverse bore.
  • the two reversing spaces 40 and 42 are radially offset, essentially in the axial direction. extending bore sections formed, which are each connected by inclined or radial bores.
  • the dead space 44 is closed to the control mirror 16 by a screw plug 45.
  • the bores running in the axial direction of the two other dead spaces are introduced into the end face of the control part 12 remote from the control mirror 16 and are closed by locking screws 46.
  • the radial bores in the dead spaces are also closed on the outside by locking screws.
  • the volume of the reversing spaces which also includes the volume of the blind bores 23, 27, 29, corresponds at least to the displacement volume of a displacer and should not exceed 5 times the displacement volume of a displacer in order to minimize compression and decompression losses.
  • the displacers accommodated in the rotating cylinder drum are successively connected to the three control kidneys 18, 20 and 22 in the course of their rotary movement and are subjected to the appropriate pressure.
  • the respective displacement chamber is connected to the associated dead space 40, 42 and 44 via one of the three through bores 23, 27 and 29, so that the oil volume of the assigned displacement space is practically increased by the volume of the dead space.
  • the resulting soft reversal significantly reduces the loads and noise emissions described above and thus improves the efficiency of the hydrotransformer compared to conventional solutions.
  • First test run with the hydrotransformer according to the invention confirm the superiority over the known solutions.
  • the shape of the cavities within the base body 24 plays a subordinate role. It is essential that the volume of the dead spaces effective in the changeover zones is measured as a function of the system pressure, the switching frequency and the geometry of the through bores in such a way that the rigidity of the "oil spring" is reduced in the changeover phase.
  • a hydrotransformer with a multiplicity of displacers, each of which is guided into a displacement space.
  • the pressure medium supply and discharge to and from the displacement spaces is controlled by a control device provided with control recesses.
  • the effective position of the control recesses with respect to the dead center positions of the displacers can be changed, each displacement space being connectable to a dead space in a changeover phase during the transition between two adjacent control recesses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne un hydrotransformateur comportant une pluralité de déplaceurs qui sont guidés, dans chaque cas, dans une chambre de déplacement. L'alimentation en fluide hydraulique et son évacuation en direction et en provenance des chambres de déplacement sont régulées par l'intermédiaire d'un dispositif de commande munie de cavités de commande (18, 20, 22). La position efficace des cavités de commande (18, 20, 22) par rapport aux positions de point mort des déplaceurs peut être modifiée. Chaque chambre de déplacement peut être reliée, dans une phase d'inversion de commande, au moment du passage entre deux cavités de commande (18, 20, 22) adjacentes, avec un espace mort (40, 42, 44).
PCT/DE2003/001833 2002-09-11 2003-06-04 Hydrotransformateur WO2004027267A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/516,728 US20050166751A1 (en) 2002-09-11 2003-06-04 Hydro transformer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10241979A DE10241979A1 (de) 2002-09-11 2002-09-11 Hydrotransformator
DE10241979.5 2002-09-11

Publications (1)

Publication Number Publication Date
WO2004027267A1 true WO2004027267A1 (fr) 2004-04-01

Family

ID=31724622

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/001833 WO2004027267A1 (fr) 2002-09-11 2003-06-04 Hydrotransformateur

Country Status (3)

Country Link
US (1) US20050166751A1 (fr)
DE (1) DE10241979A1 (fr)
WO (1) WO2004027267A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434504A (zh) * 2011-12-09 2012-05-02 哈尔滨工业大学 轴向配流的液压变压器

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRE20050110A1 (it) * 2005-10-04 2007-04-05 Orles Ferretti Sistema di distribuzione per unita' idrostatica a pistoni
WO2012171519A2 (fr) 2011-06-14 2012-12-20 Schaeffler Technologies AG & Co. KG Hydrotransformateur
US8662277B2 (en) 2011-12-22 2014-03-04 Fairfield Manufacturing Company, Inc. Planetary gearbox with integral service brake
US9429227B2 (en) 2014-02-19 2016-08-30 Fairfield Manufacturing Company, Inc. Planetary gearbox with integral service brake

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847938A (en) * 1955-12-01 1958-08-19 John T Gondek Hydraulic pump
DE1233267B (de) * 1959-08-21 1967-01-26 Citroen Sa Einrichtung zur Geraeuschminderung bei schiebergesteuerten Pumpen und Fluessigkeitsmotoren
US3362342A (en) * 1964-06-12 1968-01-09 Dowty Technical Dev Ltd Hydraulic apparatus
GB1324756A (en) * 1971-02-03 1973-07-25 Bosch Gmbh Robert Axial piston machine
DE2837178A1 (de) * 1978-08-25 1980-03-06 Aleksandr Konstantino Alekseev Axial-drehkolbenpumpe
WO1997031185A1 (fr) * 1996-02-23 1997-08-28 Innas Free Piston B.V. Transformateur de pression
DE10025248A1 (de) * 2000-05-22 2001-11-29 Mannesmann Rexroth Ag Hydrotransformator

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079864A (en) * 1963-03-05 Pressure intensifier
US2892413A (en) * 1955-10-25 1959-06-30 Sundstrand Machine Tool Co Anti-hum device
US3183847A (en) * 1961-12-22 1965-05-18 Hydro Kinetics Inc Variable displacement pump
US3188963A (en) * 1962-06-04 1965-06-15 Bendix Corp Fluid intensifier
US3289604A (en) * 1964-09-23 1966-12-06 Gunnar A Wahlmark Fluid device
US3585901A (en) * 1969-02-19 1971-06-22 Sundstrand Corp Hydraulic pump
DE7114577U (de) * 1971-04-16 1972-09-28 Bosch R Gmbh Verdraengerpumpe
DE2333380C2 (de) * 1973-06-30 1982-04-08 Eckhard 7120 Bietigheim Aschke Hydraulische Maschine
US4007663A (en) * 1974-02-01 1977-02-15 Mitsubishi Kogyo Kabushiki Kaisha Hydraulic pump of the axial piston type
GB1525411A (en) * 1975-01-24 1978-09-20 Dowty Hydraulic Units Ltd Noise reduction in axial piston machines
SE507637C2 (sv) * 1991-09-06 1998-06-29 Parker Hannifin Ab Förfarande och anordning för dämpning av flödespulsationer vid hydrostatiska hydraulmaskiner av deplacementtyp samt anordning för utövande av förfarandet
US5894783A (en) * 1997-07-01 1999-04-20 Hydro-Gear Limited Partnership Hydrostatic transmission swash plate assembly
SE514196C2 (sv) * 1997-12-08 2001-01-22 Parker Hannifin Ab Hydraulisk roterande axialkolvmaskin

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847938A (en) * 1955-12-01 1958-08-19 John T Gondek Hydraulic pump
DE1233267B (de) * 1959-08-21 1967-01-26 Citroen Sa Einrichtung zur Geraeuschminderung bei schiebergesteuerten Pumpen und Fluessigkeitsmotoren
US3362342A (en) * 1964-06-12 1968-01-09 Dowty Technical Dev Ltd Hydraulic apparatus
GB1324756A (en) * 1971-02-03 1973-07-25 Bosch Gmbh Robert Axial piston machine
DE2837178A1 (de) * 1978-08-25 1980-03-06 Aleksandr Konstantino Alekseev Axial-drehkolbenpumpe
WO1997031185A1 (fr) * 1996-02-23 1997-08-28 Innas Free Piston B.V. Transformateur de pression
DE10025248A1 (de) * 2000-05-22 2001-11-29 Mannesmann Rexroth Ag Hydrotransformator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434504A (zh) * 2011-12-09 2012-05-02 哈尔滨工业大学 轴向配流的液压变压器

Also Published As

Publication number Publication date
US20050166751A1 (en) 2005-08-04
DE10241979A1 (de) 2004-03-18

Similar Documents

Publication Publication Date Title
DE19706114C9 (de) Vorrichtung zur Pulsationsverminderung an einer hydrostatischen Verdrängereinheit
DE4229069C2 (de) Taumelscheiben-Kältemittelkompressor für ein Kühlsystem
WO2007118624A1 (fr) Machine a piston hydrostatique avec disque de commande rotatif
DE19504220A1 (de) Verstellbare hydrostatische Pumpe
DE10209805A1 (de) Elektronische Bohrungsdruckoptimierungseinrichtung
WO2006122808A1 (fr) Machine hydrostatique a pistons fonctionnant selon le principe des coupelles flottantes
EP1174617A2 (fr) Machine hydrostatique à pistons axiaux
WO2004027267A1 (fr) Hydrotransformateur
DE102022200140A1 (de) Axialkolbenmaschine mit zumindest teilweise spanend hergestellten Vorkompressionsräumen
WO2013068210A1 (fr) Machine à pistons hydrostatique
DE10037114B4 (de) Hydrotransformator
WO2015086336A1 (fr) Machine à plateau oscillant, plateau oscillant et procédé d'équilibrage hydrostatique d'un raccordement d'élément de réglage d'une machine à plateau oscillant
DE10044784A1 (de) Verstellvorrichtung für eine Axialkolbenmaschine in Schrägachsenbauweise
EP1299644A1 (fr) Transformateur hydraulique
DE3242983A1 (de) Regelbare fluegelzellenpumpe
DE102013225892A1 (de) Schrägscheibenmaschine, Schrägscheibe und Verfahren zur hydrostatischen Entlastung einer Stellteilanbindung einer Schrägscheibenmaschine und zum Druckabbau eines Arbeitsmediums während eines Umsteuervorgangs der Schrägscheibenmaschine
DE3322549A1 (de) Fluegelzellenpumpe mit veraenderlichem foerderhub fuer hydraulische betriebsmittel insbesondere von kraftfahrzeugen
DE10044782C1 (de) Verstelleinrichtung für eine Axialkolbenmaschine in Schrägachsenbauweise
DE69207224T2 (de) Taumelscheiben-Kolbenhydraulikanlage
DE10034239B4 (de) Hydrotransformator
WO2008034808A1 (fr) pompe à piston radial
DE3414535C2 (fr)
DE10025248A1 (de) Hydrotransformator
DE19538447B4 (de) Hydrostatische Maschine mit reduzierter Druckflüssigkeitsmenge
DE102012013572A1 (de) Hydrostatische Taumelscheibenmaschine

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 10516728

Country of ref document: US

122 Ep: pct application non-entry in european phase