EP2047113A1 - Elektropneumatischer hybridantrieb - Google Patents
Elektropneumatischer hybridantriebInfo
- Publication number
- EP2047113A1 EP2047113A1 EP07786687A EP07786687A EP2047113A1 EP 2047113 A1 EP2047113 A1 EP 2047113A1 EP 07786687 A EP07786687 A EP 07786687A EP 07786687 A EP07786687 A EP 07786687A EP 2047113 A1 EP2047113 A1 EP 2047113A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive unit
- cooling air
- hybrid drive
- hybrid
- pneumatic
- 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.)
- Granted
Links
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
- 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
- F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm 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
- 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
- F15B15/088—Characterised by the construction of the motor unit the motor using combined actuation, e.g. electric and fluid actuation
Definitions
- the invention relates to an electropneumatic hybrid drive, with at least one electric drive unit and at least one pneumatic drive unit driven by compressed air, which work together on the output side.
- Such an electro-pneumatic hybrid drive is shown in DE 102 44 260 Al. It contains a pneumatic drive unit formed in the manner of a pneumatic cylinder and an electric drive unit cooperating with the latter on the output side, designed as an electrodynamic linear direct drive.
- the two drive units By coordinated electrical and pneumatic control, the two drive units, as far as the power output, either complement or they can be operated alternately. This allows a very varied use.
- the power of the electric drive unit suffers due to its own heat generation. Overheating can even cause damage to individual components of the hybrid drive.
- a comparable problem is also subject to the hybrid drive described in DE 103 27 371 Al.
- a cooling of the electric drive unit takes place during operation of the hybrid drive, which improves power efficiency and efficiency and contributes to the protection of the components exposed to the heat occurring.
- the coolant used here is not an externally supplied medium, but the exhaust air arising during operation of the pneumatic drive unit, which in the case of conventional operation would be discharged unused directly to the atmosphere. Due to the displacement from the pneumatic drive unit, the exhaust air has the necessary flow energy to be able to be passed through the electric drive unit. This saves additional energy for the provision and transport of the cooling medium.
- a high cooling capacity is automatically obtained, which is due to the fact that the exhaust air discharged from the pneumatic drive unit is greatly cooled due to its expansion and thus an effective cooling effect occurs even at high ambient temperatures.
- the outlet temperature of the compressed air may be near freezing.
- Cooling measures as such are known from many fields of technology. Thus, for example, in automotive technology for cooling the drive motor to air or water cooling resorted. However, the cooling medium must always be provided separately for the purpose of cooling.
- DE 32 21 928 A1 discloses an electropneumatic pilot control stage for a pneumatic servo valve which cooperates with equipped for air cooling. Although the cooling air used comes from the associated servo valve, but is not exhaust air, but is tapped via a nozzle from the feed channel, so that an increased fluid and energy requirements occurs. There are also no indications for an application for cooling an electropneumatic hybrid drive.
- EP 0 917 279 B1 discloses an air conditioning system in which an air flow is generated by an electrically driven turbine, which air is passed through a heat exchanger and subsequently also used to cool the electric motor driving the turbine.
- a pneumatic drive unit is not available here.
- US Pat. No. 5,449,961 describes a combination of a gas turbine and an electric machine in the form of an electric motor or generator.
- compressed air is branched off from the compressor of the gas turbine.
- the cooling air is therefore no exhaust air, but is used only for cooling purposes, which affects the efficiency.
- the combined in the hybrid drive drive units are preferably linear drive units, but can in principle be designed as a rotary drive units, and also a combination between linear and rotary drive units is conceivable.
- the hybrid drive will be designed in such a way that its drive units are connected via separate output links. which may act on a common force delivery
- the drive units have a common output member, on which both electrically induced drive forces and pneumatically induced drive forces can act.
- At least one cooling air channel which can be flowed through by the running of the pneumatic drive unit functioning as cooling air.
- At least one cooling air duct preferably extends in a drive housing of the electric drive unit that contains the output member.
- the electric drive unit can be assigned a plurality of cooling air ducts which can be simultaneously and / or temporally offset and in this case flowed through by the cooling air with the same or different flow direction.
- Passing through cooling air with opposite flow direction is particularly advantageous in connection with at least two cooling air ducts which extend along the direction of movement of the output member of the electric drive unit along the travel path of the output member. As a result, an extremely uniform temperature distribution in the electric drive unit can be generated.
- the output member of the electric drive unit will be accommodated in a receiving space adapted to the cross section of a housing of the electric drive unit and subdivide this receiving space into one or two chambers. It is now advantageous if at least one of these chambers is connected to at least one cooling air channel, so that the supplied cooling air is a pulse-like thrust support for the output member of the electric drive unit at the beginning of its movement can afford.
- the exhaust air of the pneumatic drive unit still has a sufficiently high residual pressure in order to develop an additional force for a short time. As a result, at least the influence of friction when starting the electric drive unit can be minimized or even completely compensated.
- the hybrid drive expediently contains a preferably electrically controllable control valve device which has one or more exhaust air outlets, from which or from which the cooling air for the pneumatic drive unit to be cooled can be tapped off.
- the control valve device can be installed directly on the electric drive unit, so that the one or more exhaust air outlets communicate directly with one or more cooling air ducts.
- a connection can be made by means of a suitable exhaust duct, for example in the form of a flexible hose or a rigid pipe.
- control valve device contains two exhaust air outlets, it is possible to connect each to its own cooling air duct or to combine the exhaust air outlets and to make a common connection to at least one cooling air duct.
- the figures 1, 2 and 3 contained therein show, in each case schematic representation, various embodiments of the hybrid drive according to the invention.
- the illustrated hybrid drives 1 each contain an electric drive unit 2 and a pneumatic drive unit 3, which are combined to form a structural unit.
- the summary is done by way of example by means of a schematically indicated rigid connection structure 4, on the example, the drive housing 5, 6 of the two drive units 2, 3 are firmly connected.
- the two drive housings 5, 6 could be attached directly to one another or these two drive housings 5, 6 could be realized in the form of a unitary drive housing.
- the two drive housing 5, 6 have a fixed, positionally immutable assignment.
- the two drive units 2, 3 work together on the output side. They act together on a force delivery member 7, which can be driven by them to a direction indicated by double arrow power output movement 8.
- the force output member 7 is expediently equipped with fastening means, not shown, over which a component to be moved can be attached.
- Each drive unit 2, 3 contains an output drive 12, 13 which can be driven relative to the associated drive housing 5, 6 by a driven movement 12, 13 which is indicated by a double arrow.
- These output members 14, 15 jointly act simultaneously on the force output member 7. By way of example, this is done in each case via a coupling rod 16 extending in the direction of the output movement 12, 13, although other types of coupling are also possible.
- the output member 14 of the electric drive unit 2 can be driven to its output movement 12.
- the driving forces for generating the Ab 5 drive 13 of the associated output member 15 serving pneumatic, ie generated by compressed air.
- a mutual operation can take place in order to achieve a high acceleration.
- an exclusive operation of the pneumatic drive unit 3 with, if required, a high travel speed can take place.
- an exclusive operation of the electric drive unit 2 can take place, within the scope of which an exact position
- the two drive units 2, 3 are designed as linear drives.
- the driven movements 5, 13 are linear movements, which coincide expediently with the direction of movement of the likewise linear power output movement 8.
- one or both drive units 2, 3 are designed as rotary actuators that can generate a rotary Abtriebsbe- movement, from the example, a likewise rotative, for example, pivoting force output movement 8 is derivable.
- the two drive units 2, 3 are independent of each other. They contain the two already mentioned separate output members 14, 15, which act on a jointly assigned force output member 7. However, it would be readily possible, both drive units 2, 3 to assign a single output member together, which can be acted upon by both electrically induced driving forces and by pneumatically induced driving forces. A possible embodiment of such a type disclosed in DE 102 44 260 Al.
- the electric drive unit 2 could be, for example, a spindle drive with an electric motor which can set a drive spindle in rotation, with which the output member 14 is in threaded engagement so that it is offset by the rotation of the drive spindle in the linear output movement 12.
- a toothed belt drive would be conceivable.
- electrodynamic linear direct drive is regarded as being particularly advantageous, as it is also used in the exemplary embodiments.
- the linear direct drive has a receiving space 18, which is formed in its drive housing 5 and extends in the direction of the output movement 12, in which the associated output member 14 is slidably received.
- the output member 14 of the receiving space 18 is axially divided into two chambers 22, 23 whose volume varies depending on the current position of the output member 14.
- the receiving space 18 is expediently closed on the front side.
- the output member 14 may be formed piston-shaped.
- the trained as a linear direct drive electric drive unit 2 includes two on the electromagnetic basis drivingly cooperating drive means 24, 25, of which one, first drive means 24 on the drive housing 5 and the other, second drive means 25 is arranged on the output member 14.
- the first drive means 24, indicated only by dash-dotted lines in the drawing, is formed by a coil device which contains a plurality of coaxially successive drive coils. It extends along the entire travel path of the output member 14.
- the arranged on the output member 14 second output device 25 is designed as a magnetic device and contains at least one, but preferably a plurality of axially consecutive permanent magnets 26, expediently with opposite polarization.
- the two drive means 24, 25 work together according to the electrodynamic principle. Via the electronic control device 17, the drive coils of the first drive device 24 can be excited one after the other, individually or in groups, the generated magnetic field interacting with the magnetic fields of the permanent magnets 26 of the second drive device 25, so that reaction forces result, which the output member 14, depending on Polungsraum, act on the execution of the output movement 12 in one or the other direction. The reaction forces thereby form the driving force acting on the output member 14.
- the pneumatic drive unit 3 is a built-up, for example, in the manner of a conventional pneumatic cylinder linear drive, although a rodless variant would be used.
- the driven member 15 is designed as a piston, which is arranged in an extending in the direction of the driven movement 13 interior 27 of the associated drive housing 7 and this interior 27 under sealing axially divided into two working chambers 28, 29. In each working chamber 28, 29 opens one of two independent fluid channels 32, 33, via the compressed air can be selectively fed or discharged, to exert on the output member 15, the desired driving force.
- a preferably electrically actuable Steuerven- til beautiful 34 is present, which has two working outputs 35, to each of the fluid channels 32, 33 is connected.
- the control valve device 34 also includes a feed port 36 which is connected or connectable to a compressed air source 37.
- control valve device 34 also contains at least one and expediently two exhaust air outlets 38, 39, via which the exhaust air displaced from the pneumatic drive unit 3 during its operation can flow out to the atmosphere.
- exhaust air is that air to be understood that is currently displaced by the output member 15 from that of the two working chambers 28, 29, which is due to a correspondingly oriented output movement 13 of the output member 15 in a state of volume reduction.
- the operating state of the control valve device 34 is set electrically by the electronic control device 17.
- control valve device 34 has a 5 5/3 valve function, wherein it can be designed as a continuous valve device. A realization as a switching valve device would also be possible. If no intermediate positions are specified, a 4/2 valve function could be sufficient. In all cases, the functionality can be realized in each case lo by either only a single control valve or by a functionally coupled multiple arrangement of control valves.
- the great advantage of all mapped hybrid drives is that there are means that cause i5 the exhaust air obtained during operation of the pneumatic drive unit 3 is at least partially and preferably passed through the electrical unit 2 in its entirety as cooling air. The exhaust air of the pneumatic drive unit 3 is thus before cooling to the atmosphere for cooling
- the cooling effect is particularly pronounced because the exhaust air has a very low temperature due to the relaxation process associated with its discharge.
- the relaxation results from the fact that the exhaust air was previously fed into the relevant working chamber 28, 29 to produce an opposite output movement 13 as compressed air under a relatively high pressure.
- the exhaust air can in principle be passed arbitrarily through the electric drive unit 2 o.
- Effective and yet inexpensive is an arrangement in which the cooling air the drive housing 5 of the electric drive unit 2 flows through. Additionally or alternatively, however, it could also be passed through the output member 14, for example.
- the drive housing 5 of the electric drive unit 2 is penetrated by a cooling air duct 42, which expediently extends in the direction of the output movement 12, preferably in the vicinity of the drive device 24 assigned to the drive housing 5 at one end via an exhaust duct 43, for example a hose or a pipe, at the same time to both exhaust air outlets 38, 39 of the control valve device 34 is connected.
- an exhaust duct 43 for example a hose or a pipe
- the cooling air duct 42 is traversed by a cooling air flow in both directions of movement of the output member 15 of the pneumatic drive unit 3.
- the summary of the two exhaust air outlets 38, 39 can be accomplished, for example, via a corresponding pipe fitting.
- cooling air channels 42 may be formed, which are also fed from the two exhaust air outlets 38, 39 with serving for cooling exhaust air.
- a separate exhaust air line 43 can be dispensed with if the control valve device 34 is attached directly to the drive housing 5 and communicates with the at least one cooling air duct 42 via internal channels of the housing.
- the output via the two exhaust air outlets 38, 39 exhaust air is independent from each other as cooling air to the electric drive unit 2 passed.
- the drive housing 5 at least two cooling air ducts 42, which are not connected to one another and which are connected to one of the two exhaust air outlets 38, 39 independently of one another, directly or by conveying an exhaust air duct 43, extend.
- either only one or only the other cooling air passage 42 is thus alternately flowed through by cooling air.
- the outflow opening 44 of the cooling air channels 42 may be provided on the front side of the drive housing 5 as in the other embodiments, but this is not mandatory.
- the two exhaust air outlets 38, 39 in the exemplary embodiment of FIG. 2 are connected to the two preferably parallel cooling air passages 42, in that these two cooling air passages 42 are flowed through in opposite directions in the axial direction of the driven movement 12.
- the air feed into the two cooling air channels 42 can be done in particular on mutually oppositely oriented channel ends, so that the outflow openings 44 of the cooling air channels 42 may also be oriented opposite each other, in particular the front side of the drive housing 5th
- An extension of the cooling air duct or passages 42 parallel to the direction of movement of the output member 14 has the advantage that the entire region in which heat is generated is exposed to the cooling air. At least one cooling air channel 42 could also extend helically around the receiving space 18 around.
- the embodiment of Figure 3 is identical to that of Figure 2 except for a difference.
- This difference consists in that the two cooling air channels 42 are connected via at least one branch channel 45 to one of the two above-mentioned chambers 22, 23, which divides the output member 14 from each other.
- This has the consequence that from the exhaust air of the pneumatic drive unit 3, a certain proportion in the connected chamber 22, 23 can occur, so as to supply a force-like support for the drive of the output member 14 by acting on the end face of the output member 14.
- a certain proportion in the connected chamber 22, 23 can occur, so as to supply a force-like support for the drive of the output member 14 by acting on the end face of the output member 14.
- the most high static friction within the pneumatic drive unit 3 must be overcome, such a measure allows an additional, pulse-like introduction of force.
- the efficiency of the hybrid drive 1 can be further improved.
- the exhaust air of the pneumatic drive unit 3 is used for cooling the electric drive unit 2 and due to their residual pressure still available is also used to generate an additional driving force within the electric drive unit 2.
- the drive housing 5 contains a plurality of cooling air passages 42, these can be placed in, preferably more uniform, distribution around the receiving space 18 in order to achieve particularly uniform cooling.
- the drive housing 5 is designed in its receiving section 8 peripherally delimiting longitudinal section as extruded part, and one or more cooling air channels 42 may be provided, which extend over a relatively large circumferential length of time around the receiving space 18 around.
- Such cooling air channels 42 can then in particular have a circular arc-shaped cross-section and be formed directly during the production of the extruded part.
- At least one cooling air duct could also be formed in an independent duct component, for example in a cooling air duct, which may be, for example, a duct. outside - is arranged on the drive housing 5.
- the cooling air can be discharged after flowing through a cooling air duct 42 directly to the surrounding atmosphere.
- a silencer to the respective outflow opening 44, which reduces the outflow noise.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Motor Or Generator Cooling System (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006044954A DE102006044954A1 (de) | 2006-09-22 | 2006-09-22 | Elektropneumatischer Hybridantrieb |
PCT/EP2007/007237 WO2008034503A1 (de) | 2006-09-22 | 2007-08-16 | Elektropneumatischer hybridantrieb |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2047113A1 true EP2047113A1 (de) | 2009-04-15 |
EP2047113B1 EP2047113B1 (de) | 2011-12-28 |
Family
ID=38626752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07786687A Not-in-force EP2047113B1 (de) | 2006-09-22 | 2007-08-16 | Elektropneumatischer hybridantrieb |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2047113B1 (de) |
CN (1) | CN101517247B (de) |
AT (1) | ATE539262T1 (de) |
DE (1) | DE102006044954A1 (de) |
WO (1) | WO2008034503A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202009014670U1 (de) * | 2009-10-30 | 2011-03-17 | Tipper Tie Technopack Gmbh | Positionierbarer Pneumatikzylinder |
DE102014016337B3 (de) * | 2014-11-05 | 2016-02-11 | Audi Ag | Falzvorrichtung |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3221928A1 (de) * | 1982-06-11 | 1983-12-15 | Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen | Elektropneumatische vorsteuerstufe fuer ein pneumatisches servoventil |
US5449961A (en) * | 1993-03-18 | 1995-09-12 | Solar Turbines Incorporated | Electric machine cooling system |
GB9721850D0 (en) * | 1997-10-16 | 1997-12-17 | Normalair Garrett Ltd | Motor cooling |
US6138458A (en) * | 1998-12-02 | 2000-10-31 | Griffin; William S. | Electro-pneumatic actuator and servo-valve for use therewith |
CN1150099C (zh) * | 2000-12-08 | 2004-05-19 | 田晓虹 | 气电混合动力发动机 |
US6959795B2 (en) * | 2002-02-20 | 2005-11-01 | Csa Engineering, Inc. | Hybrid pneumatic-magnetic isolator-actuator |
DE10244260A1 (de) * | 2002-09-24 | 2004-04-01 | Festo Ag & Co. | Linearantriebsvorrichtung |
DE10327371B4 (de) * | 2003-06-18 | 2005-07-14 | Festo Ag & Co. | Positionssteuerungsvorrichtung für einen elektro-fluidtechnischen Antrieb und Verfahren zur Positionssteuerung |
-
2006
- 2006-09-22 DE DE102006044954A patent/DE102006044954A1/de not_active Withdrawn
-
2007
- 2007-08-16 CN CN200780035339.3A patent/CN101517247B/zh not_active Expired - Fee Related
- 2007-08-16 EP EP07786687A patent/EP2047113B1/de not_active Not-in-force
- 2007-08-16 AT AT07786687T patent/ATE539262T1/de active
- 2007-08-16 WO PCT/EP2007/007237 patent/WO2008034503A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2008034503A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE539262T1 (de) | 2012-01-15 |
CN101517247A (zh) | 2009-08-26 |
CN101517247B (zh) | 2013-06-19 |
EP2047113B1 (de) | 2011-12-28 |
WO2008034503A1 (de) | 2008-03-27 |
DE102006044954A1 (de) | 2008-04-03 |
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