US20120097025A1 - Drive device for oscillating positive-displacement machines - Google Patents

Drive device for oscillating positive-displacement machines Download PDF

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Publication number
US20120097025A1
US20120097025A1 US13/379,551 US201013379551A US2012097025A1 US 20120097025 A1 US20120097025 A1 US 20120097025A1 US 201013379551 A US201013379551 A US 201013379551A US 2012097025 A1 US2012097025 A1 US 2012097025A1
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US
United States
Prior art keywords
drive mechanism
eccentric shaft
piston rods
set forth
groove
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.)
Abandoned
Application number
US13/379,551
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English (en)
Inventor
Horst Fritsch
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Prominent GmbH
Original Assignee
Prominent Dosiertechnik GmbH
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Filing date
Publication date
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Assigned to PROMINENT DOSIERTECHNIK GMBH reassignment PROMINENT DOSIERTECHNIK GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FRITSCH, HORST
Publication of US20120097025A1 publication Critical patent/US20120097025A1/en
Assigned to PROMINENT GMBH reassignment PROMINENT GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: PROMINENT DOSIERTECHNIK GMBH
Abandoned legal-status Critical Current

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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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/01—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical
    • 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
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/06—Control
    • F04B1/07—Control by varying the relative eccentricity between two members, e.g. a cam and a drive shaft
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F04B49/123—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element
    • F04B49/125—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element by changing the eccentricity of the actuation means, e.g. cams or cranks, relative to the driving means, e.g. driving shafts
    • F04B49/126—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element by changing the eccentricity of the actuation means, e.g. cams or cranks, relative to the driving means, e.g. driving shafts with a double eccenter mechanism

Definitions

  • the present invention concerns a drive mechanism for oscillating positive-displacement machines such as for example diaphragm pumps comprising an eccentric shaft and a plurality of piston rods, wherein the piston rods are connected to the eccentric shaft in such a way that rotation of the eccentric shaft produces an oscillating linear movement of the piston rods
  • Oscillatingly operating machines are usually constructed on the basis of the principle of the straight-thrust crank drive. At high levels of power or to keep down the oscillating mass forces acting on the machine foundation, such machines are usually in the form of a multi-crank drive mechanism. In that case the individual eccentrics with connecting and piston rods are arranged in mutually juxtaposed relationship either in an in-line or opposed boxer or radial star form and are driven by a common crank shaft, the eccentrics of which are respectively displaced relative to each other by the same angle.
  • the return brace which is alternatively used and which embraces all piston rods is an expensive component, in particular in large machines, and also requires a large structural volume for the entire eccentric drive mechanism.
  • DE 85 21 520 describes a multi-cylinder diaphragm pump having a plurality of diaphragm pump heads which each have a diaphragm actuable by a hydraulic piston.
  • the pump drive is effected by way of a connecting rod-eccentric arrangement.
  • the connecting rod is rotatably coupled both to the piston or the piston rod and also to the eccentric shaft whereby the drive mechanism is expensive to manufacture.
  • U.S. Pat. No. 5,368,451 describes a corresponding arrangement with three hydraulic cylinders, in which the piston rod is urged against the eccentric surface by means of a return spring.
  • DE 196 26 938 A1 also describes a star-shaped piston-cylinder arrangement in which the shaft is surrounded by radially oriented cylinders in which are arranged displaceable pistons connected to the shaft by connecting rods by way of an eccentric.
  • the object of the present invention is to provide a corresponding drive mechanism which avoids or at least reduces the described disadvantages.
  • a sliding unit guide comprises a sliding unit having a slot, a land or a groove, and a sliding block of corresponding configuration which is positively guided by the sliding unit.
  • all piston rods lie in one plane, wherein particularly preferably the piston rods are arranged in a star configuration.
  • star configuration in accordance with the present application is used to mean that the piston rods are equally spaced from each other in the peripheral direction of the eccentric shaft.
  • adjacent piston rods respectively include the same angle in a projection on a plane perpendicularly to the eccentric shaft.
  • the sliding unit guide is of such a configuration that the eccentric shaft and the piston rods are connected together in positively locking relationship in a first direction in space, preferably also in a second direction in space arranged perpendicularly thereto, while a relative movement in a third direction in space which is arranged perpendicularly to the first and second directions in space is possible.
  • the sliding unit can be in the form of a T-groove and the sliding block can be in the form of a suitably matched sliding block. It has been found in that respect that respect that the sliding unit is preferably arranged on the piston rod and the sliding blocks are preferably fixed to the eccentric shaft.
  • the eccentric shaft can be connected to a sliding element (for example rotatably) which has the sliding units or the sliding blocks, wherein the sliding units or the sliding blocks lie on the boundary surfaces of a regular polygon with n corners.
  • a sliding element for example rotatably which has the sliding units or the sliding blocks, wherein the sliding units or the sliding blocks lie on the boundary surfaces of a regular polygon with n corners.
  • the sliding unit is preferably made from hardened steel.
  • the sliding block is best made from a copper alloy, preferably bronze to permit movement of the sliding block in the sliding unit, with as low friction as possible.
  • the multi-piston drive mechanism according to the invention eliminates the disadvantages set forth in the opening part of this specification in that the piston forces both for the pressure stroke and also for the suction stroke are transmitted to the individual piston rods directly by the eccentric sliding unit which is rotatably connected to the eccentric shaft, wherein additional components such as for example an expensive return rod or connecting rods are eliminated and thus the structural size of the overall drive mechanism can be markedly reduced.
  • FIG. 1 shows a sectional view of a first embodiment of an eccentric sliding unit drive mechanism according to the invention
  • FIG. 2 shows a further sectional view perpendicularly to the view in FIG. 1 ,
  • FIGS. 3 a - c show three variants of the drive mechanism according to the invention.
  • FIGS. 4 a+b and 5 a+b show various embodiments of the connection between the piston rod and the sliding element.
  • the drive mechanism serves to drive a three-cylinder machine.
  • the drive mechanism thus has three piston rods 1 which lie in one plane and which are arranged displaced relative to each other through 120°.
  • the eccentric shaft 2 is rotatably movably connected to an eccentric sliding unit. When the eccentric shaft is rotated about the axis 12 the center point 11 of the eccentric sliding unit will move on the circle denoted by reference 13 . In other words the eccentric sliding unit performs a translatory circular movement.
  • the sliding element 6 is preferably triangular, wherein the sliding or groove blocks are arranged on the three sides of the triangle, which have slide surfaces 8 .
  • the piston rods 1 have corresponding slide shoes 5 which serve as a sliding unit. As can be seen in particular from FIG.
  • the slide shoe 5 embraces the sliding blocks of the sliding element 6 so that the slide surfaces 8 of the sliding blocks bear against the slide surfaces 7 of the sliding unit.
  • the sliding blocks of the sliding element 6 are thus embraced by the slide shoe 5 in positively locking relationship.
  • the slide shoes 5 Upon rotation of the shaft 2 the slide shoes 5 will slide along the slide surfaces 8 of the sliding blocks. That structure provides that almost no transverse forces are applied to the piston rods 1 by the eccentric shaft.
  • FIGS. 3 a through 3 c show three different embodiments of the invention.
  • FIG. 3 a shows a two-cylinder drive.
  • the drive mechanism therefore has only two piston rods 1 .
  • the sliding element 6 ′ is here of a rectangular shape, wherein it is only at two opposite sides of the rectangle that there are arranged corresponding sliding blocks which are provided with slide surfaces and which are embraced by the slide shoes 5 of the piston rods 1 .
  • the center point 11 of the sliding element 6 ′ will move along the circle 13 .
  • FIG. 3 b shows the embodiment already known from FIGS. 1 and 2 , with three cylinders.
  • FIG. 3 c shows a four-cylinder drive.
  • the sliding element 6 ′′ is similar to the sliding element 6 ′ of the embodiment of FIG. 3 a , but in this case arranged at all four sides of the square sliding element 6 ′′ are corresponding sliding blocks carrying slide surfaces 11 , which are respectively embraced by a slide shoe 5 of one of the four piston rods 1 .
  • FIGS. 4 and 5 show special embodiments of the slide shoes 5 .
  • FIGS. 4 a and 4 b show a view on an enlarged scale of the sliding unit guide.
  • the piston rods 1 at their end have a pressure plate 5 ′ which together with the restraint claws 14 form the slide shoe.
  • the restraint claws 14 are fixed to the pressure plate 5 ′ by means of a screw. In the embodiment shown in FIG. 4 a the restraint claw 14 is screwed at the end face onto the pressure plate 5 ′.
  • the restraint claw 14 is of a U-shaped configuration so that it embraces both the sliding block and also the pressure plate 5 ′.
  • the claw 14 is then screwed to the pressure plate 5 ′ from behind, that is to say from the side thereof, that is remote from the sliding block.
  • FIGS. 5 a and 5 b show embodiments in which the restraint claws 14 are screwed to the peripherally extending edge of the pressure plate 5 ′.
  • both restraint claws 5 ′ are connected together by means of a bolt and suitable fitting screws 15 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Transmission Devices (AREA)
US13/379,551 2009-08-11 2010-08-03 Drive device for oscillating positive-displacement machines Abandoned US20120097025A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009037123 2009-08-11
DE102009037123.0 2009-08-11
PCT/EP2010/061303 WO2011018393A1 (de) 2009-08-11 2010-08-03 Antriebsvorrichtung für oszillierende verdrängermaschinen

Publications (1)

Publication Number Publication Date
US20120097025A1 true US20120097025A1 (en) 2012-04-26

Family

ID=43242194

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/379,551 Abandoned US20120097025A1 (en) 2009-08-11 2010-08-03 Drive device for oscillating positive-displacement machines

Country Status (10)

Country Link
US (1) US20120097025A1 (pt)
EP (1) EP2464867B1 (pt)
JP (1) JP2013501881A (pt)
CN (1) CN102472262A (pt)
BR (1) BR112012003106A8 (pt)
CA (1) CA2762274A1 (pt)
ES (1) ES2523271T3 (pt)
MY (1) MY160348A (pt)
RU (1) RU2012104760A (pt)
WO (1) WO2011018393A1 (pt)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2540548A (en) * 2015-07-20 2017-01-25 Delphi Int Operations Luxembourg Sarl Novel pump design
CN108050041A (zh) * 2018-01-25 2018-05-18 刘硕毅 同面多缸直动式气体压缩机构

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102691636B (zh) * 2012-06-09 2015-02-25 林志元 一种水持续增压装置
DE112014002794A5 (de) * 2013-06-13 2016-03-10 Magna Powertrain Bad Homburg GmbH Radialkolbenverdichter
CN105715473A (zh) * 2016-04-01 2016-06-29 郑州科技学院 一种多缸高压径向柱塞泵
CN107120252A (zh) * 2017-03-31 2017-09-01 杨先哲 一种动力转化装置和气泵
CN107339218A (zh) * 2017-07-17 2017-11-10 李静茹 一种高效率空气压缩器
CN110630461B (zh) * 2019-09-24 2021-02-05 浙江瑞程石化技术有限公司 一种变量径向柱塞泵

Citations (6)

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Publication number Priority date Publication date Assignee Title
US3682044A (en) * 1970-03-31 1972-08-08 Delavan Mfg Co Inc Balanced hydraulic device
US4223595A (en) * 1977-05-26 1980-09-23 Riva Calzoni S.P.A. Device for coupling the pistons to the rotor in a radial-piston hydraulic motor
US5069874A (en) * 1986-09-08 1991-12-03 Oiles Corporation Method for reducing high-load, low-speed wear resistance in sliding members
US5393358A (en) * 1990-12-03 1995-02-28 Nkk Corporation Method for producing abrasion-resistant steel having excellent surface property
US6244832B1 (en) * 1998-04-09 2001-06-12 Robert Bosch Gmbh Radial piston pump for high-pressure fuel delivery
US20030031568A1 (en) * 2001-08-10 2003-02-13 Hans-Peter Stiefel Radial piston pump for producing high fuel pressure, as well as method for operating an internal combustion engine, computer program, and control and/or regulating unit

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CH83943A (de) * 1919-05-17 1920-02-02 Brandenberg Hanselmann Robert Pumpenantrieb
CH504620A (de) * 1970-03-02 1971-03-15 Wisag Wissenschaftliche Appara Kolbenpumpe, deren Hub veränderlich einstellbar ist
DE8521520U1 (de) * 1985-07-25 1987-04-16 Lewa Herbert Ott Gmbh + Co, 7250 Leonberg Mehrzylindermembranpumpe
CN86200564U (zh) * 1986-02-26 1987-02-11 上海试验机厂 用于万能试验机上的径向辐射七柱塞圆泵
DE3900888A1 (de) * 1989-01-13 1990-07-26 Rexroth Mannesmann Gmbh Radialkolbenmaschine
US5368451A (en) 1991-06-04 1994-11-29 Hammond; John M. Metering pump
US6024542A (en) * 1994-02-14 2000-02-15 Phillips Engineering Co. Piston pump and method of reducing vapor lock
DE19626938A1 (de) * 1996-07-04 1998-01-08 Wanzke Lothar Sternförmige Kolben-Zylinderanordnung
EP1555954B1 (de) * 2002-10-17 2010-04-14 Braun GmbH Munddusche und sprühdüse zur erzeugung eines flüssigkeitsstrahls sowie zahnreinigungssystem
DE10248338A1 (de) * 2002-10-17 2004-05-06 Braun Gmbh Tauchkolbenpumpe
CN101131152A (zh) * 2007-10-16 2008-02-27 天津市泽华源泵业科技发展有限公司 恒压变量径向柱塞泵
CN101315074A (zh) * 2008-06-21 2008-12-03 张桂云 柱塞泵往复运动装置
CN101457747B (zh) * 2008-12-18 2010-07-07 浙江工业大学 立式单偏心轴径向均布多联往复泵

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3682044A (en) * 1970-03-31 1972-08-08 Delavan Mfg Co Inc Balanced hydraulic device
US4223595A (en) * 1977-05-26 1980-09-23 Riva Calzoni S.P.A. Device for coupling the pistons to the rotor in a radial-piston hydraulic motor
US5069874A (en) * 1986-09-08 1991-12-03 Oiles Corporation Method for reducing high-load, low-speed wear resistance in sliding members
US5393358A (en) * 1990-12-03 1995-02-28 Nkk Corporation Method for producing abrasion-resistant steel having excellent surface property
US6244832B1 (en) * 1998-04-09 2001-06-12 Robert Bosch Gmbh Radial piston pump for high-pressure fuel delivery
US20030031568A1 (en) * 2001-08-10 2003-02-13 Hans-Peter Stiefel Radial piston pump for producing high fuel pressure, as well as method for operating an internal combustion engine, computer program, and control and/or regulating unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2540548A (en) * 2015-07-20 2017-01-25 Delphi Int Operations Luxembourg Sarl Novel pump design
CN108050041A (zh) * 2018-01-25 2018-05-18 刘硕毅 同面多缸直动式气体压缩机构

Also Published As

Publication number Publication date
ES2523271T3 (es) 2014-11-24
BR112012003106A8 (pt) 2017-12-05
CA2762274A1 (en) 2011-02-17
RU2012104760A (ru) 2013-09-20
JP2013501881A (ja) 2013-01-17
CN102472262A (zh) 2012-05-23
MY160348A (en) 2017-02-28
WO2011018393A1 (de) 2011-02-17
EP2464867A1 (de) 2012-06-20
EP2464867B1 (de) 2014-09-03
BR112012003106A2 (pt) 2016-02-23

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Owner name: PROMINENT DOSIERTECHNIK GMBH, GERMANY

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Effective date: 20111108

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STCB Information on status: application discontinuation

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