EP1172553A2 - Hydrotransformator - Google Patents
Hydrotransformator Download PDFInfo
- Publication number
- EP1172553A2 EP1172553A2 EP01115826A EP01115826A EP1172553A2 EP 1172553 A2 EP1172553 A2 EP 1172553A2 EP 01115826 A EP01115826 A EP 01115826A EP 01115826 A EP01115826 A EP 01115826A EP 1172553 A2 EP1172553 A2 EP 1172553A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- windows
- hydrotransformer
- connection
- control body
- 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.)
- Withdrawn
Links
Images
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
- F04B1/20—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
-
- 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
- F04B1/128—Driving means
-
- 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
-
- 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
- F04B1/28—Control of machines or pumps with stationary cylinders
- F04B1/29—Control of machines or pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B1/295—Control of machines or pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash 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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
- F04B9/117—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
Definitions
- the invention relates to a hydrotransformer the preamble of claim 1.
- a hydrotransformer is a unit in which an energy flow Q 1 xp 1 is converted into an energy flow Q 2 xp 2 by hydraulic coupling of a hydraulic motor and a pump. In this case, 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 or as axial piston machines.
- US 3,188,963 shows one as a swash plate machine executed hydrotransformer, in which in a rotatable Cylinder-guided displacers on a fixed swash plate are supported.
- the angle of attack of the swashplate determines the piston stroke of the displacer.
- the pressure medium supply and removal takes place via a control disc with four control kidneys, one pair of control kidneys each is assigned to the motor or the pump.
- WO 97/31185 A1 are two of the three control kidneys by one Control recess formed over a slidable Bridge is divided into the two control kidneys.
- the web can move along the control recess the effective control length (effective length) of the control kidneys Gear ratio setting can be changed.
- the guidance and sealing of the control bridge is however relatively difficult, so this solution is difficult is feasible.
- the invention is based on the object to create a hydrotransformer where the setting the gear ratio compared to the one described above State of the art is simplified.
- the hydrotransformer according to the invention is equipped with a Control body provided in the two radial to the displacement spaces a control window arranged are.
- Control window offset on the front in the axial direction Displacement rooms trained. Due to the radially offset Relative arrangement of the control body can this comparatively simply on the outer circumference or in an axial bore of the Rotors are stored. Because the control window is pocket-shaped are formed, the control body is in the axial direction Pressure equalized so that no reaction forces are transmitted become.
- the change in the effective tax length of the two Control window is preferably through one in the axial direction running relative movement between control body and Rotor, preferably the control body with respect to Rotor is moved axially. In principle, however, it is also possible to close the rotor with reference to the fixed control body move.
- the design of the two control windows is special simply if this is through an approximately rectangular control recess with an approximately diagonal direction Web are formed.
- This diagonal web can be straight or curved, for example helical.
- the two are on a diagonal web separate control window the tank connection and the Supply port assigned while a third, larger Control window assigned to the work or consumer connection is.
- this can be the work connection assigned control window also - similar to that State of the art described at the beginning - on a control disk be formed.
- the relative position of this Control window with reference to the dead center positions of the displacers cannot be changed.
- the in the control window trained control window two more Transitional breakthroughs are assigned via the dead center positions the transition between the load pressure at the work connection and the supply pressure or the tank pressure can be produced is.
- the control of the gear ratio takes place via the control body.
- the invention can be used in constructions in axial and radial piston design, in the latter Case vane units can be used particularly advantageously are.
- Figure 1 shows a longitudinal section through a hydrotransformer 1, which is designed in axial piston design is.
- This has one in a housing, not shown guided cylinder drum 2 in the a variety of cylinder bores 4 are formed, in which displacer 6 are axially displaceable.
- the displacers 6 and the cylinder bores 4 delimit displacement spaces 8 which alternately with a dashed line in FIG Tank connection T, a supply connection P and a Work or consumer connection A can be connected.
- the Displacers 6 are on the foot side against an inclined surface 10 a swash plate 12 biased so that with a relative rotation between swash plate 12 and drum 2 Displacers 6 can be set in a lifting movement.
- the drum 2 is penetrated by an axial bore 14, in which a control body displaceable in the axial direction 16 is sealingly guided.
- the control body 16 is bolt-shaped trained and has on its outer peripheral surface three control windows 18, 20 (see Figure 1) and 22 (see Figure 2).
- the two control windows 18, 20 are not over channels shown in the rotor or in the control body 16 with connected to the tank connection T or the supply connection P, while the rear control window 22 in FIG. 1 via a corresponding channel with the work or Consumer connection A is connected.
- control windows 18, 20, 22 are through three webs 24, 26, 28 separated from each other, the web between the two control windows 18, 20 formed as a diagonal web 24 is.
- a radial channel 30 extends so that the displacement spaces 8 alternately with the control windows 18, 20, 22 are connectable.
- FIGS. 3 and 4 16 Details of the control body are shown in FIGS. 3 and 4 16 explained.
- Figure 3 shows a settlement of Control body 16 with a rectangular control window 22 and the two approximately triangular control windows 18, 20 separated by the diagonal web 24 are.
- the two webs 24, 26 extending in the axial direction separate the control window 24 from the two triangular ones Control windows 18, 20, the dividing line of the settlement divides the web 24 in the middle.
- the section plane AA shown in FIG. 1 is also shown in the development according to FIG. 3.
- the control windows 18, 20, 24 are passed over by the cross sections of the mouth of the radial channels 30 along the section line AA.
- Each displacement chamber 8 is connected to the control window 20 for the length l 1 and thus to the supply connection P and to the tank connection T for the length l 2 .
- the corresponding radial channel 30 passes over the control window 22, so that a connection to the consumer connection is established.
- the length l 1 corresponds to the length l 2 , so that a corresponding transmission ratio is established.
- the transmission ratio is changed by axially displacing the control body 24 in the direction of the arrow according to FIG. 1, as a result of which the line AA in FIG. 3 shifts accordingly.
- an axial position of the control body 16 is indicated with a double dotted line, in which the length l 1 'is substantially greater than the effective control length l 2 ' during which the displacement space in question is connected to the tank connection T - the transmission ratio becomes approximately proportional changed to the ratio of the new effective control lengths l 1 'and l 2 '.
- FIG. 4 shows a section along the line AA in FIG. 3, from which the ratios of the effective control lengths l 1 , l 2 can be seen.
- the effective length of the rectangular control window 22 remains unchanged.
- an arbitrarily curved, for example helically curved web 24 can alternatively be used, so that a non-linear change in the effective control lengths l 1 , l 2 can be set.
- FIG. 1 A variant is indicated by dash-dotted lines in FIG. 1, according to which a control disk 32 is assigned to the drum 2 is via which the pressure medium supply to the work connection A is controlled.
- the control body 16 is then corresponding only with the two remaining connections, the Tank connection T and the supply connection P assigned Control windows 18, 20 provided.
- Figure 5 shows a schematic View of the end indicated in Figure 1 Control disc 32.
- the control window 22 as Control kidney trained, which is roughly between the two Dead center positions OT and UT extends. From the control window 22 seen from the dead center positions OT and UT are two comparatively short transition openings 38, 40 are formed, the transition when the dead center positions are exceeded to the supply connection (transition opening 40) or to the tank connection (transition breakthrough 38). that is, in this variant, the control disk 32 are unchanged permanent tax windows / tax breaks, while in the control body 16 by axial displacement variable control window 18, 20 arranged are.
- the pressure medium supply from the displacement spaces 8 to the in the control disc 32 formed control window 22 or the transition openings 38, 40 take place via axial channels 42 (indicated by dashed lines in FIG. 1) the displacement rooms 8 open. That is, with this variant A radial channel 30 and open into each displacement space 8 Axial channel 42 through which in connection to the control windows 18, 20 or 22 can be produced.
- these pressure compensation pockets axially offset from the control windows 18, 20, 22 are formed.
- control body arranged radially to the displacement spaces also with other types of hydrotransformer, for example Vane cell units can be used.
- control body for example be arranged in an axial bore of the rotor, which Radial holes are connected to the displacement spaces.
- Disclosed is a hydrotransformer with a rotor, in which a large number of displacers is guided.
- the the Displacer-absorbing displacement spaces are above one Control device with at least three control windows a work connection, a supply connection or a Connectable tank connection.
- the control unit has a control body in which at least two of the control windows are radial are offset to the displacement rooms.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Housings And Mounting Of Transformers (AREA)
- Hydraulic Motors (AREA)
Abstract
Description
Es zeigen:
- 1
- Hydrotransformator
- 2
- Trommel
- 4
- Zylinderbohrung
- 6
- Verdränger
- 8
- Verdrängerraum
- 10
- Schrägfläche
- 12
- Schrägscheibe
- 14
- Axialbohrung
- 16
- Steuerkörper
- 18
- Steuerfenster
- 20
- Steuerfenster
- 22
- Steuerfenster
- 24
- Diagonalsteg
- 26
- Stege
- 28
- Stege
- 30
- Radialkanal
- 32
- Stege
- 34
- Stege
- 36
- Stege
- 38
- Übergangsdurchbrüche
- 40
- Übergangsdurchbrüche
- 42
- Axialkanal
Claims (10)
- Hydrotransformator mit einem Rotor (2), in dessen Verdrängerräumen Verdränger (6) geführt sind, die zur Steuerung eines Hubbewegung an einem Hubelement (12) abgestützt sind, und mit einer Steuereinrichtung (16, 32) mit zumindest drei Steuerfenstern (18, 20, 22), die mit einem Versorgungsanschluß (P), einem Arbeitsanschluß (A) bzw. einem Tankanschluß (T) verbunden sind und die wechselweise mit den die Verdränger (6) aufnehmenden Verdrängerräumen (8) in Überdeckung bringbar sind, wobei das Druckverhältnis durch Verändern der wirksamen Steuerlängen (1) der Steuerfenster (18, 20) einstellbar ist, dadurch gekennzeichnet, daß die Steuereinrichtung einen Steuerkörper (16) hat, in dem zumindest zwei radial zu den Verdrängerräumen (8) versetzte Steuerfenster (18, 20) ausgebildet sind, die mit den Verdrängerräumen (8) über Verbindungskanäle (30) verbunden sind und deren Geometrie derart gewählt ist, daß die wirksame Steuerlänge (1) der Steuerfenster (18, 20) bei einer Verstellung des Steuerkörpers (16) gegenläufig veränderbar ist.
- Hydrotransformator nach Patentanspruch 1, wobei der Steuerkörper (16) in Axialrichtung mit Bezug zum Rotor (2) verschiebbar ist.
- Hydrotransformator nach Patentanspruch 2, wobei der Steuerkörper (16) in einer Axialbohrung (14) des Rotors (2) geführt ist.
- Hydrotransformator nach Patentanspruch 2 oder 3, wobei die beiden Steuerfenster (18, 20) durch eine Steuerausnehmung mit einem Diagonalsteg (24) gebildet sind.
- Hydrotransformator nach Patentanspruch 4, wobei der Diagonalsteg (24) wendelförmig ausgebildet ist.
- Hydrotransformator nach einem der vorhergehenden Patentansprüche, wobei im Steuerkörper (16) Druckausgleichstaschen zur Kompensation des in den Steuerfenstern (18, 20) wirkenden Druckes ausgebildet sind.
- Hydrotransformator nach Patentanspruch 6, wobei die Druckausgleichtaschen diametral zu oder axial versetzt zu den Steuerfenstern (18, 20) angeordnet sind.
- Hydrotransformator nach einem der vorhergehenden Patentansprüche, wobei das dem Arbeitsanschluß (A) zugeordnete Steuerfenster (22) am Steuerkörper (16) ausgebildet ist.
- Hydrotransformator nach einem der Patentansprüche 1 bis 7, wobei das dem Arbeitsanschluß (A) zugeordnete Steuerfenster (22) an einer stirnseitigen Steuerscheibe (32) ausgebildet ist, in der auch zwei dem Tankanschluß (T) und dem Versorgungsanschluß (P) zugeordnete Übergangsdurchbrüche (38, 40) ausgebildet sind.
- Hydrotransformator nach einem der vorhergehenden Patentansprüche, wobei dieser in Axialkolbenbauweise oder in Radialkolbenbauweise, vorzugsweise als Flügelzelleneinheit ausgeführt ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10034239 | 2000-07-13 | ||
DE10034239A DE10034239B4 (de) | 2000-07-13 | 2000-07-13 | Hydrotransformator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1172553A2 true EP1172553A2 (de) | 2002-01-16 |
EP1172553A3 EP1172553A3 (de) | 2003-12-03 |
Family
ID=7648899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01115826A Withdrawn EP1172553A3 (de) | 2000-07-13 | 2001-06-28 | Hydrotransformator |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1172553A3 (de) |
DE (1) | DE10034239B4 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003087575A1 (de) * | 2002-04-17 | 2003-10-23 | Bosch Rexroth Ag | Hydrotransformator |
WO2010025729A1 (de) * | 2008-09-06 | 2010-03-11 | Danfoss A/S | Axialkolbenmaschine und umkehrosmoseeinrichtung |
CN113374747A (zh) * | 2021-04-09 | 2021-09-10 | 哈尔滨理工大学 | 一种斜盘柱塞式液压变压器缓冲结构设计方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3079864A (en) | 1963-03-05 | Pressure intensifier | ||
US3188963A (en) | 1962-06-04 | 1965-06-15 | Bendix Corp | Fluid intensifier |
WO1997031185A1 (en) | 1996-02-23 | 1997-08-28 | Innas Free Piston B.V. | Pressure transformer |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE469931A (de) * | 1945-11-26 | |||
US4077746A (en) * | 1974-04-11 | 1978-03-07 | Sundstrand Corporation | Hydraulic intensifier system |
GB8515944D0 (en) * | 1985-06-24 | 1985-07-24 | Normalair Garrett Ltd | Pressure intensifier device |
US6038958A (en) * | 1998-04-07 | 2000-03-21 | Noax B.V. | Porting for hydraulic pressure transformer |
-
2000
- 2000-07-13 DE DE10034239A patent/DE10034239B4/de not_active Expired - Fee Related
-
2001
- 2001-06-28 EP EP01115826A patent/EP1172553A3/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3079864A (en) | 1963-03-05 | Pressure intensifier | ||
US3188963A (en) | 1962-06-04 | 1965-06-15 | Bendix Corp | Fluid intensifier |
WO1997031185A1 (en) | 1996-02-23 | 1997-08-28 | Innas Free Piston B.V. | Pressure transformer |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003087575A1 (de) * | 2002-04-17 | 2003-10-23 | Bosch Rexroth Ag | Hydrotransformator |
WO2010025729A1 (de) * | 2008-09-06 | 2010-03-11 | Danfoss A/S | Axialkolbenmaschine und umkehrosmoseeinrichtung |
CN113374747A (zh) * | 2021-04-09 | 2021-09-10 | 哈尔滨理工大学 | 一种斜盘柱塞式液压变压器缓冲结构设计方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1172553A3 (de) | 2003-12-03 |
DE10034239B4 (de) | 2009-09-17 |
DE10034239A1 (de) | 2002-04-25 |
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