EP1664540A1 - Drehkolbenmaschine - Google Patents
DrehkolbenmaschineInfo
- Publication number
- EP1664540A1 EP1664540A1 EP04786754A EP04786754A EP1664540A1 EP 1664540 A1 EP1664540 A1 EP 1664540A1 EP 04786754 A EP04786754 A EP 04786754A EP 04786754 A EP04786754 A EP 04786754A EP 1664540 A1 EP1664540 A1 EP 1664540A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotors
- rotary piston
- piston machine
- housing
- machine according
- 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
- 230000008859 change Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 15
- 230000008901 benefit Effects 0.000 description 6
- 238000007667 floating Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0076—Fixing rotors on shafts, e.g. by clamping together hub and shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C1/00—Rotary-piston machines or engines
- F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
- F01C1/082—Details specially related to intermeshing engagement type machines or engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/008—Prime movers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C3/00—Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type
- F04C3/06—Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type the axes being arranged otherwise than at an angle of 90 degrees
- F04C3/08—Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type the axes being arranged otherwise than at an angle of 90 degrees of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C3/085—Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type the axes being arranged otherwise than at an angle of 90 degrees of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing the axes of cooperating members being on the same plane
Definitions
- the invention relates to a rotary engine, according to the preamble of the main claim.
- a rotary lobe machine is known (DE-PS 4241320) as a pump, compressor or motor, in which the combs of teeth, a rotating drive part for limiting working spaces, run on a cycloid surface of a likewise toothed output part and drive it in the process. Between the teeth of the drive part and the driven part, the above-mentioned working spaces are formed, which are enlarged or reduced for their work while the parts are rotating in order to produce the conveying effect on a medium.
- Internal combustion engines for example as a pre-feed pump in diesel injection systems or as a pre-feed pump or as a pressure and feed pump of gasoline injection systems, can serve.
- the combination as a structural unit, between the motor housing and the machine housing, offers the possibility of making such a delivery or pressure pump small, since the electric motor can act directly on the drive part of the rotors, without additional expensive storage.
- the connection of the housing can be given in a variety of ways, for example as a screw connection between two "pots" which on the one hand encompass the pump and on the other hand the electric motor, or there can be a crimp between a cover part and a pot part, depending on how this is done for the Practical use and, above all, inexpensive production seems to make sense.
- the part relating to the electric motor is arranged, such as the magnets and the bearing of the rotor, and that the pump parts are accommodated in the machine housing, including the accessories - And discharge device for the medium.
- the fixed main axis provides good, above all axially aligned guidance of the rotating parts, namely the rotor of the electric motor, the drive part and the driven part, so that even if the inner housing were floatingly supported, there would be a radial adjustment.
- such an axis can also be used for the axial integration of the parts and, last but not least, offer advantages in the case of automatic assembly in large series production.
- the relatively short bearing width given in the known bearings is around a in the fixed main axis, in particular in the rotor of the electric motor Widened many times, whereby the specific radial forces are reduced in accordance with the larger bearing surface, which benefits the longevity of the rotary lobe machine. Longevity and reliability play an extremely important role, particularly when used as a fuel pump in the automotive industry.
- the bearing bush claimed has been proposed earlier, but is not part of the prior art. However, it plays a significant role in connection with the individual features of claim 1 and their configurations.
- Such an “electric pump” according to the invention is not restricted in its use as a fuel priming pump, but can be used for liquid or gaseous media, depending on its size and performance, whereby significantly higher pressures can be generated than in the known fuel priming pumps (Robert Bosch GmbH or the like).
- fuel priming pumps Robot Bosch GmbH or the like.
- the bearing bush is connected to a bottom bearing for the driven part, on which the driven part is supported on its side facing away from the drive part and which is also rotatably arranged on the main axis.
- the bearing bush and floor bearing have the same axis, which is perpendicular to the bearing surface on which the driven part is supported.
- the rotors run in an inner housing in which the suction channel and the pressure channel are open towards the rotors.
- This inner housing is arranged in a rotationally fixed and non-floating manner within the remaining machine housing and, in particular, is secured against rotation in relation to the base bearing.
- the inner housing can be arranged in an additional housing bushing and can be secured there against twisting.
- This housing bushing in turn, can be mounted in the outer machine housing.
- the rotors run in a recess (of the inner housing) which is open and cylindrical on the driven side and closed and spherical on the drive side. The drive part is supported on this spherical surface, while the driven part is held in its working position on the cylindrical side by the bearing bush and the bottom bearing.
- the drive part has an inner spherical area on which the driven part is supported with a correspondingly designed end face or the bearing bush of the driven part.
- the driven part is axially loaded in the direction of the drive part.
- the driven part is loaded by a spring force in the direction of the drive part.
- a spring force can be advantageous in particular in the starting phase of such a pump in order to achieve the tightness required for the conveyance between the working flanks of the interlocking teeth.
- the pressure channel of the machine is connected to a space between the driven part and the housing (bottom bearing) on the side facing away from the drive part. This ensures that when the medium in the pressure channel has reached a certain pressure, the driven part is pressed against the drive part in such a way that the above-mentioned tightness between the flanks can be achieved by this pressure.
- the transitions between the spherical bearing surfaces facing one another for axial support and the tooth surfaces delimiting the working space are rounded off on the rotors.
- Such a rounding on the one hand achieves a higher tightness between the boundaries of the working spaces, which leads to an improvement in the effective pressure and delivery effect of the pump, and on the other hand it simplifies the machining of the pump parts in these sections during manufacture, quite apart from the fact that the danger of chip formation given with sharp-edged parts is avoided.
- the radius of such roundings is preferably at least 1 mm. Basically, this radius depends on the size of the pump parts.
- short-circuit channels or short-circuit grooves are arranged in the bottom surface of the rotors, via which adjacent work spaces can be connected to one another during rotation and in particular before opening a suction or pressure channel, in order to to achieve a pressure equalization in the changing volumes of the work rooms.
- the delivery spaces between the parts change, the associated flanks of the teeth of one part sliding over the corresponding surfaces of the other part, so that the Spaces lying between the teeth, from which the actual work spaces arise, act here as harmful spaces. While an overpressure would develop in one harmful room, an underpressure would develop in the neighboring room.
- the invention provides a pressure equalization of the rooms, which benefits the pump efficiency.
- FIG. 1 shows a fuel feed pump according to the invention in longitudinal section according to arrow I in Figure 2; 2 shows a longitudinal section through the feed pump according to the line II-II in Figure 1; Fig. 3 The associated rotors of the pump in longitudinal section on an enlarged scale, and in an exploded view; Fig. 4 The inner housing of the pump in longitudinal section;
- the fuel feed pump shown has a rotary lobe pump 1 and an electric motor 2 driving it, which are arranged in a motor housing 3 and a housing cover 4 screwed thereon.
- the electric motor in particular is shown in a highly simplified manner with a rotor 5 and a magnetic ring 6, as well as an axial closure part 7 of the motor housing 3, which is connected to the motor housing 3 and sealed to it.
- a fixed axis 8 (main axis) of the rotor 5 and the possible pressure connection 9 for the fuel discharge are arranged on this closure part 7.
- the fuel pump is designed as a submersible pump in which the fuel reaches the pump via suction openings 10, which are only indicated here then leave the pump again via the pressure connection 9.
- the electric motor 5, 6 flows around the fuel within the motor housing 3.
- the second fixed bearing 11 of the rotor 5 is arranged on the housing of the pump 1, which is arranged in a corresponding bore on the end face of an inner housing 12 of the rotary lobe pump 1.
- This inner housing 12 is arranged on the outside in a housing bushing 13, which in turn is sealed off from the motor housing 3, partly clamped therein and partly within the housing cover 4.
- a recess 14 is provided in the inner housing 12, with a cylindrical section 15 and a spherical section 16.
- Two pump rotors namely a drive part 17 and a driven part 18, work in this recess 14.
- the drive part 17 is driven by a claw coupling 20 by the rotor 5 of the electric motor 2 and transmits its rotary movement to the driven part 18.
- On the end faces of the drive part 17 and the driven part 18 cycloidal toothings are provided, as can be seen in FIG. 3, and have the corresponding mutually facing working surfaces 19.
- pump work spaces 21 are formed between the work surfaces 19 and the inner wall of the recess 14, as can be seen in FIG. 2.
- the recess 14 is closed on the output side by a base bearing 22 which is arranged obliquely to the axis of the recess 14 in order to achieve the required delivery angle and which is sealed off at 23 from the housing bush 13.
- a bearing journal 24 is arranged in this floor bearing 22, specifically perpendicular to the end face of the floor bearing 22 facing the recess 14, on which the driven part 18 is mounted via a bore 25 (FIG. 3).
- the driven part 18 is supported on a corresponding spherical recess 30 of the drive part 17 via a spherical surface 29 facing the drive part 17 (FIG. 3).
- FIG. 4 shows how the conveying process takes place.
- the working spaces 21 (FIG. 2) are supplied or disposed of with fuel via conveying means 31 which are arranged in the walls of the inner housing 12.
- the fuel is then directed to the underside of the output part 18, whereby this is loaded in the direction of the drive part 17, which, however, only works if the pump has already generated pressure.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Reciprocating Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Knitting Machines (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Centrifugal Separators (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10342342 | 2003-09-11 | ||
PCT/DE2004/002033 WO2005024236A1 (de) | 2003-09-11 | 2004-09-10 | Drehkolbenmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1664540A1 true EP1664540A1 (de) | 2006-06-07 |
EP1664540B1 EP1664540B1 (de) | 2007-01-24 |
Family
ID=34258650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04786754A Expired - Lifetime EP1664540B1 (de) | 2003-09-11 | 2004-09-10 | Drehkolbenmaschine |
Country Status (8)
Country | Link |
---|---|
US (1) | US7275920B2 (de) |
EP (1) | EP1664540B1 (de) |
JP (1) | JP2007505249A (de) |
AT (1) | ATE352717T1 (de) |
BR (1) | BRPI0414235A (de) |
CA (1) | CA2538004A1 (de) |
DE (2) | DE102004044301A1 (de) |
WO (1) | WO2005024236A1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004026048A1 (de) * | 2004-05-25 | 2005-12-29 | Cor Pumps + Compressors Ag | Spaltverluststromsteuerung |
US8834140B2 (en) * | 2004-05-25 | 2014-09-16 | Cor Pumps + Compressors Ag | Leakage loss flow control and associated media flow delivery assembly |
JP5085528B2 (ja) * | 2005-03-16 | 2012-11-28 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | 回転ピストン機械 |
WO2007128303A1 (de) * | 2006-05-10 | 2007-11-15 | Cor Pumps + Compressors Ag | Drehkolbenmaschine |
JP5135361B2 (ja) * | 2007-03-13 | 2013-02-06 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | ポンプ若しくはモータ |
ATE502185T1 (de) * | 2007-08-31 | 2011-04-15 | Bosch Gmbh Robert | Druckluftmotor |
US9115646B2 (en) | 2010-06-17 | 2015-08-25 | Exponential Technologies, Inc. | Shroud for rotary engine |
KR101133302B1 (ko) | 2010-07-09 | 2012-04-04 | 금아유압 주식회사 | 축방향 피스톤 모터 |
DE102013226974A1 (de) * | 2013-12-20 | 2015-06-25 | Robert Bosch Gmbh | Taumelpumpe mit im Stator gelagerter Welle |
EP3724507A4 (de) | 2017-12-13 | 2021-10-20 | Exponential Technologies, Inc. | Rotierende fluidströmungsvorrichtung |
US11168683B2 (en) | 2019-03-14 | 2021-11-09 | Exponential Technologies, Inc. | Pressure balancing system for a fluid pump |
DE102020124825A1 (de) | 2020-09-23 | 2022-03-24 | Kolektor Group D.O.O. | Motor-Pumpe-Einheit |
DE102021103306A1 (de) | 2021-02-12 | 2022-08-18 | Kolektor Group D.O.O. | Handgeführtes Druckflüssigkeitsgerät |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2662482A (en) * | 1951-09-12 | 1953-12-15 | Paulsmeier Fritz | Ball piston pump |
US2831436A (en) * | 1952-08-19 | 1958-04-22 | Garvenswerke Maschinen Pumpen & Waagenfabrik W Garvens | Pump |
US3101700A (en) * | 1960-06-14 | 1963-08-27 | Meredith E Bowdish | Rotary compressor or engine |
US3236186A (en) * | 1963-04-29 | 1966-02-22 | Wildhaber Ernest | Positive-displacement unit |
DE1551081A1 (de) * | 1967-06-06 | 1970-04-16 | Walter Bietzig | Drehkugelmaschine |
US4981424A (en) * | 1988-12-21 | 1991-01-01 | The United States Of America As Represented By The Secretary Of The Navy | High pressure single screw compressors |
WO1993012325A1 (de) * | 1991-12-09 | 1993-06-24 | Felix Arnold | Drehkolbenmaschine |
CA2215219C (en) * | 1996-11-19 | 2000-07-04 | Yukio Kajino | Disc-type rotary engine |
DE10035900A1 (de) * | 2000-07-21 | 2002-01-31 | Bosch Gmbh Robert | Innenzahnradpumpe |
JP2002364572A (ja) | 2001-06-07 | 2002-12-18 | Kawakami Seisakusho:Kk | 流体圧送装置 |
DE10150653A1 (de) * | 2001-10-13 | 2003-04-30 | Bosch Gmbh Robert | Innenzahnradpumpe |
BR0313309B1 (pt) | 2002-08-02 | 2012-08-21 | máquina de êmbolo rotativa com carcaça interna deslocável. |
-
2004
- 2004-09-10 AT AT04786754T patent/ATE352717T1/de not_active IP Right Cessation
- 2004-09-10 US US10/571,243 patent/US7275920B2/en not_active Expired - Lifetime
- 2004-09-10 DE DE102004044301A patent/DE102004044301A1/de not_active Withdrawn
- 2004-09-10 CA CA002538004A patent/CA2538004A1/en not_active Abandoned
- 2004-09-10 JP JP2006525622A patent/JP2007505249A/ja not_active Withdrawn
- 2004-09-10 DE DE502004002805T patent/DE502004002805D1/de not_active Expired - Lifetime
- 2004-09-10 WO PCT/DE2004/002033 patent/WO2005024236A1/de active IP Right Grant
- 2004-09-10 BR BRPI0414235-7A patent/BRPI0414235A/pt not_active Application Discontinuation
- 2004-09-10 EP EP04786754A patent/EP1664540B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO2005024236A1 * |
Also Published As
Publication number | Publication date |
---|---|
BRPI0414235A (pt) | 2006-10-31 |
DE502004002805D1 (de) | 2007-03-15 |
ATE352717T1 (de) | 2007-02-15 |
US7275920B2 (en) | 2007-10-02 |
WO2005024236A1 (de) | 2005-03-17 |
EP1664540B1 (de) | 2007-01-24 |
DE102004044301A1 (de) | 2005-05-19 |
JP2007505249A (ja) | 2007-03-08 |
CA2538004A1 (en) | 2005-03-17 |
US20060257277A1 (en) | 2006-11-16 |
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