US20060201324A1 - Reciprocating piston engine - Google Patents

Reciprocating piston engine Download PDF

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Publication number
US20060201324A1
US20060201324A1 US10/550,433 US55043305A US2006201324A1 US 20060201324 A1 US20060201324 A1 US 20060201324A1 US 55043305 A US55043305 A US 55043305A US 2006201324 A1 US2006201324 A1 US 2006201324A1
Authority
US
United States
Prior art keywords
membrane
reciprocating piston
piston machine
cross
area
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
US10/550,433
Other languages
English (en)
Inventor
Erich Becker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KNF Neuberger GmbH
Original Assignee
KNF Neuberger GmbH
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 KNF Neuberger GmbH filed Critical KNF Neuberger GmbH
Assigned to KNF NEUBERGER GMBH reassignment KNF NEUBERGER GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BECKER, ERICH
Publication of US20060201324A1 publication Critical patent/US20060201324A1/en
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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members

Definitions

  • the invention relates to a reciprocating piston machine comprising at least one working membrane and/or at least one auxiliary membrane made from an elastomeric material as well as an oscillating reciprocating drive engaging the membrane in a center zone, with a membrane zone, which deforms during the oscillating pumping movement, being provided between the central zone of the membrane, and a circumferential edge zone clamped in the reciprocating piston machine.
  • a reciprocating piston machine of the type mentioned at the outset has been known from DE 198 34 468 C1, which is embodied as a membrane pump.
  • the membrane pump known from DE 198 34 468 C1 has a working membrane serving as a reciprocating piston made from an elastomeric material, which is clamped with its circumferential edge zone in the pump housing.
  • An oscillating reciprocating drive engages the central zone of the working membrane, setting the membrane into a pumping movement.
  • a stiff molded core is formed in the central zone of the working membrane, which is connected to a drive rod of the pump drive.
  • a stiff support element is also connected to the molded core, which stiffens the working membrane and, during the pumping movements, limits the deforming membrane and flexing area to a comparatively small annular zone of the membrane.
  • the object is to particularly provide a reciprocating piston machine of the type mentioned at the outset with it being characterized by a working membrane and/or auxiliary membrane having a long life and a secure function.
  • the solution to this objective according to the invention comprises a reciprocating piston machine of the type mentioned at the outset, in particular in that the geometric adjustment of the working membrane and/or auxiliary membrane, different due to the stroke, to the mounting points provided in the central zone and at the circumferential edge zone results from two merging curves, which develop from a respective design of the membrane.
  • Another alternative to meet the above-described objective provides for the cross-section of the working membrane and/or the auxiliary membrane to be sized in a deformable membrane zone, such that during the pumping movement approximately equal tension and/or elastic deformation develops in the deformable membrane zone.
  • an additional, also independently patentable solution to the above-described objective provides for the working membrane and/or the auxiliary membrane to have at least two self-supporting annular zones in the deformable membrane zone, which merge in a reduction of the membrane cross-section, and that the cross-section of the membrane in the annular zones are each enlarging beginning at the cross-sectional reduction.
  • the working membrane and/or auxiliary membrane of the reciprocating piston machine according to the invention is sized in the deformable membrane zone, such that approximately equal tension and/or elastic deformation develop in the deformable membrane zone during the pumping movement. Due to the fact that partial tension peaks in the upper surface membrane zone are avoided in the working membrane and/or auxiliary membrane, the geometrical deformation required by the stroking movement of the membrane and/or auxiliary membrane is not represented by two annular zones serving as hinges, but by two merging curves, with their merging point, depending on the stroke, being located at a different position of the radius between the central zone and the circumferential zone clamped in the reciprocating piston machine.
  • the cantilever-shaped annular zones are characterized in that, beginning at the reduction of the cross-section, the cross-section of the membranes enlarges in each of the annular zones towards the outside (exterior annular zone) and/or towards the inside (interior annular zone.) Due to the fact that the working membrane and/or the auxiliary membrane of the reciprocating piston machine according to the invention is therefore embodied without any hinge area subject to any particular stress, the reciprocating piston machine is characterized by a long life and a low noise operation of its working membrane and/or auxiliary membrane.
  • the cross-section of the membrane is particularly advantageous for the cross-section of the membrane to at least partially enlarge linearly in the annular zones.
  • a particularly advantageous embodiment according to the invention provides for the reduction of the cross-section to be sized in the range from 0.6 to 0.8 in reference to the diameter of the deformable membrane zone.
  • the reciprocating piston machine is particularly advantageous for the reciprocating piston machine to be embodied as a membrane pump, with its fast-moving working membrane and/or auxiliary membrane regularly to be subjected to a particular stress.
  • the working membrane of such a membrane pump can be embodied as a molded membrane or as a flat membrane. While in the molded membrane a molded piece, connected via a drive rod of the stroke drive, is molded in the elastomer material of the membrane, in order to mold the membrane surface, facing the pump space, to the cross-section of the pump space such that the molded membrane completely fills the top dead center of the pump space, the flat membrane is clamped in its central zone between the upper end of the drive rod and, on its membrane surface facing the pump space, a pressure disc.
  • FIG. 1 a membrane pump in a partial longitudinal cross-section in an area of a pump head provided with a working membrane
  • FIG. 2 a detailed representation of the section, marked in dot-dash lines in FIG. 1 of the membrane pump according to FIG. 1 .
  • a working membrane 1 serving as the stroke piston in a reciprocating piston machine embodied as a membrane pump, is shown in a partial cross-section.
  • the working membrane 1 comprises an elastomeric material, into which a molded piece 2 has been molded. While the molded piece 2 forming the central area 3 of the membrane 1 is connected to an oscillating drive rod 4 of a reciprocating drive, not shown here, the circumferential area 5 of the membrane 1 is clamped into the pump head 6 of the reciprocating piston machine.
  • a membrane area or flexing area M is provided, which deforms during the oscillating pumping movements.
  • the cross-section of the working membrane 1 is designed such that during the pumping movement almost identical tension and/or elastic deformation develops in the surface area of the membrane 1 , which can be deformed.
  • the geometrical deformation required by the reciprocating movement is not represented by two hinged annular zones, as known from working membranes or auxiliary membranes of prior art, but by two merging curves with their merging point being located, depending on the position of the drive, at a different position of the radius between the membrane center 3 and the clamping point 5 .
  • These curves are developed by the strength of the elastomer used to produce the membrane 1 being selected such for each position of the membrane 1 that the two merging curves develop by the drive during the membrane deformation.
  • the working membrane 1 is provided with two cantilever-shaped annular areas 7 , 8 , which merge in the area of the exterior circumference of the deformable membrane area M.
  • These cantilever-shaped annular areas 7 , 8 are designed and sized such that in the normal position of the working membrane 1 the tension allowed for the annular area 7 , 8 develops homogenously in every annular zone 7 , 8 under the predetermined stress.
  • the cantilever-shaped annular areas 7 , 8 are characterized in that in these annular areas 7 , 8 the cross-section of the membrane each enlarge from the cross-sectional reduction 9 outward (annular area 8 ) and/or inward (annular area 7 ). In FIG. 1 and in the detailed view according to FIG. 2 it is discernible that the cross-section of the working membrane 1 at least partially enlarges linearly in these annular areas 7 , 8 .
  • the cross-sectional thickness reduction 9 ranges from 0.6 to 0.8 in reference to the diameter of the deformable membrane area M, and forms the intersection of the extensions of the bottom sides of the annular areas defined by the annular areas 7 , 8 , positioned approximately at the narrowest point of the cross-sectional reduction 9 .
  • the membrane pump shown here is characterized in a long life and a low-noise operation of its working membrane 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US10/550,433 2003-03-22 2004-02-13 Reciprocating piston engine Abandoned US20060201324A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10312898A DE10312898A1 (de) 2003-03-22 2003-03-22 Hubkolbenmaschine
DE103-12-898.0 2003-03-22
PCT/EP2004/001390 WO2004083638A1 (de) 2003-03-22 2004-02-13 Hubkolbenmaschine

Publications (1)

Publication Number Publication Date
US20060201324A1 true US20060201324A1 (en) 2006-09-14

Family

ID=32946074

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/550,433 Abandoned US20060201324A1 (en) 2003-03-22 2004-02-13 Reciprocating piston engine

Country Status (4)

Country Link
US (1) US20060201324A1 (de)
EP (1) EP1611354A1 (de)
DE (1) DE10312898A1 (de)
WO (1) WO2004083638A1 (de)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904068A (en) * 1956-05-14 1959-09-15 Weatherhead Co Appliance regulator
US4231287A (en) * 1978-05-01 1980-11-04 Physics International Company Spring diaphragm
US4237775A (en) * 1978-08-21 1980-12-09 Gould Inc. Diaphragm for pressure sensors
US4785719A (en) * 1980-05-16 1988-11-22 J. Wagner Gmbh Diaphragm for high pressure pumps, compressors or the like
US5306122A (en) * 1989-08-31 1994-04-26 J. Wagner Gmbh Diaphragm pump construction
US5564911A (en) * 1992-03-05 1996-10-15 Joe Santa & Associates Pty Limited Pump, control valve and diaphragm
US5863184A (en) * 1995-04-18 1999-01-26 J. Wagner Gmbh Diaphragm pump apparatus
US6123320A (en) * 1998-10-09 2000-09-26 Swagelok Co. Sanitary diaphragm valve
US6276907B1 (en) * 1999-08-12 2001-08-21 Wagner Spray Tech Corporation Hydraulically driven diaphragm pump
US20010050040A1 (en) * 2000-05-25 2001-12-13 Toshiharu Shimizu Diaphragm and reciprocating pump using the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9403103U1 (de) * 1994-02-24 1994-04-14 ASF, Gesellschaft für elektrotechnische Geräte mbH, 82178 Puchheim Membrane für eine Membranpumpe zum Fördern eines brennbaren Fluids
DE19834468C1 (de) * 1998-07-30 2000-02-24 Asf Thomas Ind Gmbh Membrane für eine Membranpumpe

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904068A (en) * 1956-05-14 1959-09-15 Weatherhead Co Appliance regulator
US4231287A (en) * 1978-05-01 1980-11-04 Physics International Company Spring diaphragm
US4237775A (en) * 1978-08-21 1980-12-09 Gould Inc. Diaphragm for pressure sensors
US4785719A (en) * 1980-05-16 1988-11-22 J. Wagner Gmbh Diaphragm for high pressure pumps, compressors or the like
US5306122A (en) * 1989-08-31 1994-04-26 J. Wagner Gmbh Diaphragm pump construction
US5564911A (en) * 1992-03-05 1996-10-15 Joe Santa & Associates Pty Limited Pump, control valve and diaphragm
US5863184A (en) * 1995-04-18 1999-01-26 J. Wagner Gmbh Diaphragm pump apparatus
US6123320A (en) * 1998-10-09 2000-09-26 Swagelok Co. Sanitary diaphragm valve
US6276907B1 (en) * 1999-08-12 2001-08-21 Wagner Spray Tech Corporation Hydraulically driven diaphragm pump
US20010050040A1 (en) * 2000-05-25 2001-12-13 Toshiharu Shimizu Diaphragm and reciprocating pump using the same

Also Published As

Publication number Publication date
EP1611354A1 (de) 2006-01-04
WO2004083638A1 (de) 2004-09-30
DE10312898A1 (de) 2004-10-07

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KNF NEUBERGER GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BECKER, ERICH;REEL/FRAME:017124/0480

Effective date: 20050909

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION