WO2007134928A1 - pompe à membrane - Google Patents

pompe à membrane Download PDF

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Publication number
WO2007134928A1
WO2007134928A1 PCT/EP2007/053920 EP2007053920W WO2007134928A1 WO 2007134928 A1 WO2007134928 A1 WO 2007134928A1 EP 2007053920 W EP2007053920 W EP 2007053920W WO 2007134928 A1 WO2007134928 A1 WO 2007134928A1
Authority
WO
WIPO (PCT)
Prior art keywords
membrane
diaphragm
diaphragm pump
pump
pump housing
Prior art date
Application number
PCT/EP2007/053920
Other languages
German (de)
English (en)
Inventor
Manfred Rüffer
Wolfgang Ritter
Michael JÜRGING
Jürgen Schonlau
Original Assignee
Continental Teves Ag & Co. Ohg
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 Continental Teves Ag & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Publication of WO2007134928A1 publication Critical patent/WO2007134928A1/fr

Links

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
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22—Arrangements for enabling ready assembly or disassembly

Definitions

  • the invention relates to a diaphragm pump with a diaphragm, in particular a diaphragm pump of a motor-pump unit for providing pressure for a brake actuator of a motor vehicle brake system with a pneumatic brake booster, wherein a membrane bead of the membrane is clamped in a pump housing.
  • Object of the present invention is to provide a diaphragm pump, which allows easy assembly of the diaphragm pump without adjustment measures and positioning of the membrane.
  • the object is achieved in that means are provided for radially supporting the membrane, which are displaceable relative to the pump housing before the Membraneinthere in the radial direction with respect to a central axis of the membrane.
  • the means are provided integrally with the membrane, whereby an additional assembly step is not required.
  • the means are provided in the membrane bead.
  • the function of the membrane is thus not affected.
  • a simple production of the membrane is achieved in that as a means for radial support of the membrane preferably a support ring is provided, which is vulcanized into the membrane bead.
  • the support ring on axial projections on an upper side and a lower side. These serve for the axial positioning of the support ring during vulcanization.
  • the support ring has circumferentially distributed radially aligned projections which serve the radial of the axial positioning of the support ring during vulcanization.
  • the means are designed as a separate component, which is inserted before or during assembly of the membrane in the pump housing.
  • membrane and the component can be produced inexpensively.
  • the separate component is preferably provided as a ring element with a radially inwardly formed, circumferential edge, wherein the radial support of the membrane and the tensile forces occurring at the peripheral edge.
  • the ring element can be provided according to advantageous embodiments of plastic or sheet metal.
  • the membrane bead can be clamped in order to compensate for component and assembly tolerances with an adjustable distance between pump housing components.
  • the adjustment of the distance is preferably carried out by means of a mounting method for mounting a pump housing component.
  • the dead space of the diaphragm pump can be optimized thereby.
  • Figure 1 is a perspective view of a diaphragm pump according to the invention as a component of a motor-pump unit;
  • Figure 2 shows the motor-pump unit of Figure 1 with a first embodiment of a diaphragm pump according to the invention partially cut.
  • FIG. 3 shows a working space cover of the membrane pump according to the invention according to FIG. 2 cut;
  • Figures 4a and 4b each a section of a known diaphragm pump in longitudinal section
  • FIG. 5 shows a membrane connecting rod unit of the diaphragm pump according to the invention according to FIG. 2 in a longitudinal section in an enlarged view;
  • FIG. 6 shows a support ring of the diaphragm pump according to the invention according to FIG. 2 in a plan view
  • Figures 7a and 7b are each a detail of the diaphragm pump according to the invention according to FIG. 2 in longitudinal section and
  • Figure 8 shows a detail of a second embodiment of a diaphragm pump according to the invention in longitudinal section.
  • Fig. 1 shows a three-dimensional view of a diaphragm pump according to the invention as a component of a motor-pump unit 1, which comprises a diaphragm pump 2 with a pump 5 and a diaphragm pump 2 driving electric motor 3, wherein the motor 3, for example, designed as a DC motor can be .
  • the diaphragm pump 2 is, as is apparent in particular from FIG. 2, which shows the motor-pump unit 1 partially cut with a first embodiment of the diaphragm pump 2 according to the invention, provided as a double diaphragm pump with two opposite membranes 4, which in each case between the pump housing 5 and a working space cover. 6 is clamped and thereby limits a working space 7.
  • the diaphragm 4 are movable in opposite directions by means of a crank drive 8, which per diaphragm 4 comprises an eccentric 9 and a connecting rod 10.
  • the membrane 4 is shown in Fig. 5 as a component of a membrane connecting rod unit in an enlarged view and will be described in more detail below.
  • the working space cover 6 of the motor pump unit 1 is shown cut. It can be seen that the working space cover 6 has an upper cover 15 and a lower cover 16 which, depending on the material - plastic or aluminum - airtight welded or screwed together.
  • the centering of the upper lid 15 on the lower lid 16 is effected for example by a molded on the upper lid 15 welding allowance 19 which engages in the assembly of the upper lid 15 in a corresponding contour 20.
  • a connector 25 shown in FIG. 1 is provided with an adapter 26 which sealingly secures it and via which the connected brake booster is evacuated.
  • the adapter 26 may be executed, for example, angled as shown. Likewise, however, according to customer requirements, a straight adapter 26 is possible.
  • an adapter outlet 27, to which a vacuum hose, not shown, is attached designed differently depending on the connection. So is next to the darg Robinsonen Tannenbaumprofil also a snap or catch closure conceivable.
  • the adapter 26 can either be positioned in the connection 25 by means of a latching connection or the connection adapter connection is rotatably provided.
  • the rotatable embodiment of the connection can be realized, for example, by means of pin-shaped elements 21, which project into bores of the connection 25 and engage in a non-visible external groove of the adapter 26.
  • the port 25 opens into a housing bore, not shown, which branches into two channels formed in the pump housing 5, which lead to the two working space covers 6. This makes it possible, the working space cover 6 for both sides of the diaphragm pump 2 to design the same, whereby the assembly is much easier.
  • a second connection 25 may be provided on the opposite side of the pump housing 5. This makes it possible, depending on the customer and installation conditions of the motor-pump unit 1 to connect the adapter 26 either on one side or on the opposite side.
  • one of the terminals 25 are sealed by means of a plug. It is also conceivable to leave one of the connections 25 closed during production and to open it only when required, for example by drilling.
  • inlet channel 11 is provided, which is airtightly connected to said pump housing channel by means of a sealing element and the sucked air to an inlet valve 12 forwards.
  • the inlet valve 12 is preferably designed as a plate valve with a valve disc 11 made of elastic material.
  • the total passage area to be covered by the elastomeric valve disk 17 becomes thereby expediently divided into several small passage surfaces each having a circular cross-section.
  • the inlet channel 11 branches in the upper cover 15 in a corresponding number of individual channels 22, which are arranged in a circular ring about a central axis of the inlet valve 11.
  • the sucked air passes through the working space cover openings 23 in the lower cover 16 in the working space 7 between the diaphragm 4 and the working space cover 6, is compressed there and guided via further working space cover openings 24 to the outlet valve 14, which also as a plate valve with a valve disc 18 of elastomeric Material is formed.
  • the outlet valve 14 also as a plate valve with a valve disc 18 of elastomeric Material is formed.
  • an outlet channel 13 is formed between upper lid 15 and lower lid 16.
  • the working space cover 6 also in this exemplary embodiment has a three-dimensional shape which is adapted to the envelope of a working-surface-side membrane surface 52 which is induced by the tilting movement of a ram 45 moved by the crank drive 8.
  • the adaptation of the three-dimensional work space lid inner contour 54 to the envelope is achieved by maintaining a predetermined small distance between the areas of a hard deformable portion 50 of the membrane 4 and the working space cover 6, while the distance in the regions of easily deformable portion 44 of the membrane 4 and a Membranwulstes 51 is selected to zero.
  • the small distance of the working space lid inner contour 54 from the envelope of the working space side membrane surface 52 in the central region of the membrane 4 prevents its abutment on the working space cover 6 during operation of the diaphragm pump 2 and also allows a top dead center of the crank drive 8 a Air flow between the working space 7 and the work space ceiling openings 23,24.
  • the working space cover openings 23,24 count to the so-called Schadvolumen, i. the residual volume remaining during ejection.
  • the remaining air under atmospheric pressure expands during the suction process, whereby less volume can be sucked. It is therefore useful to design the working space cover openings 23,24 with the lowest possible volume.
  • Inlet and outlet valves 12,14 are therefore tangential to the working space lid inner contour 54, i. arranged obliquely to the planes of symmetry of the diaphragm pump 2, and the working space cover openings 23,24 are formed as short holes.
  • This embodiment of the working space cover 6 takes as a further advantage a small space to complete.
  • the ejected air is passed through the outlet channel 13 in the working space cover 6 to an outlet channel, not shown, in the pump housing 5.
  • the outlet channels 13 in the working space cover 6 and the pump housing 5 are connected airtight by means of a sealing element.
  • the two outlet channels in the pump housing 5 open into an interior 28 of the pump housing 5, the so-called crank chamber.
  • the lower cover 16 in the region of the valves 12,14 each have a positioning pin 55,56, which serves to guide the valve disks 17,18.
  • the inlet valve 12 further comprises two provided on the upper lid 15 coaxial circular sealing surfaces 57,58, which are configured as circumferential projections, wherein a Sealing surface 57 outside of the individual channels 22 and a sealing surface 58 is disposed within the individual channels 22.
  • a provided in the pump housing 5 air outlet unit 29 allows a low-noise blowing out of the air from the interior 28.
  • the air outlet unit 29 comprises a check valve 49 comprising a one- or multi-part valve body 34, which prevents a backflow of already expelled air and the penetration of liquid or gaseous substances into the crank chamber 28.
  • the air outlet unit 29 has a filter 31 arranged in a filter housing 30, through which the air exits into the atmosphere.
  • the air outlet unit 29 comprises a
  • Air outlet cover 32, a Heilauslassver gleichkappe 33 and the valve body 34 can be provided as a preassembled module.
  • the air outlet cover 32, the Heilauslassver gleichkappe 33 and the filter housing 30 are each secured with screw elements 35,37.
  • the filter housing 30 is riveted to the Heilauslassdeckel 32.
  • further means can be provided, which are advantageously integrated in the subassembly air outlet unit 29.
  • the check valve 49 opens by at least partially lifting off the valve body 34 from through holes 38 in the air outlet cover 32, and the air through openings (not shown) in the air outlet cap 33 and escape through the filter 31 from the pump housing 5 into the atmosphere.
  • the pressure in the interior 28 of the diaphragm pump 2 only by the small, to open the check valve 49 necessary differential pressure above the atmospheric pressure increase and on the other hand, the pressure in the interior 28 is subject to periodic fluctuations in the rhythm of the associated with the crank movement interior volume change. This results in a time-averaged interior pressure below the atmospheric pressure.
  • a motor shaft 139 of the electric motor 3 is mounted in a first, not shown, arranged in the motor 3 bearings and in a second bearing 40, wherein the second bearing 40 in part by a motor housing 41 and is partially absorbed by the pump housing 5.
  • the attachment of the motor 3 to the pump housing 5 by means not shown screw elements which engage in introduced in the pump housing 5 threaded inserts when the pump housing 5 is formed of plastic.
  • the motor shaft 39 also serves as an eccentric shaft, which carries the crank drive 8 with the eccentrics 9 and the connecting rods 10. However, it is also possible a separate execution of motor shaft 39 and eccentric shaft.
  • the eccentric 9 may for example be offset by 90 ° to each other, wherein the offset causes a lower torque by 90 ° and thus has a positive effect on the noise and the start-up of the diaphragm pump 2.
  • FIG. 2 further shows that the membrane 4 separates the working space 7 from the crank space 28 and is firmly connected to the plunger 45, wherein the preferably non-deformable plunger 45 can be encapsulated by the elastically deformable material of the membrane 4.
  • the plunger 45 may be connected to the connecting rod 10 either by means of a welded or a threaded connection. However, it may also be provided integrally with the connecting rod 10.
  • the connecting rods 10 are movably mounted on the eccentrics 9 by means of ball bearings 146. If the connecting rods 10 are made of plastic, injected support elements 59 in the region of a connecting rod eye 60 can stabilize the seating of ball bearings 46 in the connecting rods 10. Alternatively, slits 61 formed in the connecting rods 10 in the region of the connecting rod eye 60 can resiliently surround the ball bearings 46, as can be seen, for example, from FIG. 5.
  • means are provided to secure the diaphragm bead 51 to an adjustable distance x between pump housing components, i. the pump housing 5 and the working space cover 6, clamp.
  • manufacturing tolerances and assembly tolerances can be compensated and it is possible to optimize the dead space of the diaphragm pump 2. It is intended to carry out the adjustment during the final assembly of the motor-pump unit 1.
  • the distance adjusting means are formed by an adjustable connection between the connecting rod 10 and plunger 45.
  • An example of such a connection is a welded joint.
  • Another example is a screw connection with inserted washers.
  • Another embodiment provides the Abstandseinstellstoff as an adjustable connection between the pump housing 5 and the working space cover 6.
  • An example of such an adjustable connection is a welded joint
  • another example is a screw connection of the pump housing 5 and the working space cover 6, in which the tightening torque of the connecting screws determines the clamping deformation of the membrane rim 51 designed for this purpose as a membrane bead.
  • a weight-optimized unit 1 is obtained by the fact that the pump housing 5 and the working space cover 6 are made of plastic, for example by means of injection molding, wherein individual parts produced by injection molding are preferably joined together by ultrasonic welding.
  • the pump housing 5 and the working space cover 6 or only the pump housing 5 can be made of aluminum, since aluminum allows good heat dissipation from the motor 3. So a material combination of plastic and aluminum for the two parts is conceivable.
  • the inlet and outlet channels 11,13 are positioned in the pump housing 5 such that the two working space cover 6 can be configured identically.
  • the working space cover 6 and the pump housing 5 means for the defined positioning of the working space cover 6 on the pump housing 5 in order to facilitate the assembly and to preclude erroneous positioning.
  • an asymmetrical joint contour, as well as projections in the connection surface can be provided.
  • an asymmetrical hole pattern is suitable as the positioning means.
  • Flow channels which penetrate the connection surface between the working space cover 6 and the pump housing 5, are gas-tight in the transitions between the working space cover 6 and the pump housing 5 towards their surroundings - for example by the use of sealing elements 62 by means of a gas-tight welding.
  • the air outlet unit 29 described above consisting essentially of filter housing 30, filter 31, valve cover 32, Valve cap 33 and valve body 34 is formed as a preassembled unit and provided for installation in an opening 48 of a motor 3 facing away from the wall 53 of the pump housing 5.
  • the abutment of the disc-shaped valve body 34, for example, on the valve cover 32 is achieved by means of the valve closure cap 33.
  • the opening 48 before the onset of the air outlet unit 29 fulfills the function of a mounting window, which allows access to the interior 28 of the pump housing 5.
  • the outlet channels 13 open into the interior 28 of the pump housing 5, so that this serves as an acoustic damping chamber to reduce the exit sound when ejecting air from the work spaces 7.
  • the control of the motor-pump units 1 described for the embodiments is carried out by an electronic control unit (ECU), not shown in response to a signal from a sensor which detects a pressure difference between the vacuum chamber and a working chamber or the absolute pressure in the vacuum chamber of the brake booster.
  • ECU electronice control unit
  • the motor-pump unit 1 is turned on when the signal falls below a first predetermined lower value and turned off when the signal exceeds a second certain upper value.
  • the control unit can be integrated in an electronic control unit ECU, for example that of the brake system, or provided as a separate control unit.
  • FIGS. 4a and 4b each show a section of a known diaphragm pump 2 in longitudinal section.
  • the membrane 4 or its membrane bead 51 it is necessary for the membrane 4 or its membrane bead 51 to be radially supported in a pump housing 5 of the diaphragm pump 2.
  • the radial support of the known membrane 4 is realized by a contact of the diaphragm bead 51 on a circumferential, axially aligned projection 63 pump housing system of the pump housing 5, against which an axial inner side 64 of the diaphragm bead 51 abuts. This system is illustrated by means of an arrow P.
  • Fig. 5 shows the membrane-connecting rod unit of the diaphragm pump 2 of FIG. 2 in an enlarged view.
  • a support ring 65 is vulcanized in the radially outer membrane bead 51 of the membrane 4, which is shown in Fig. 6 in a plan view.
  • the support ring 65 serves to radially support the diaphragm 4 in the pump housing 5.
  • the tensile forces, which act on the diaphragm 4, represented by the arrow Z are supported by the support ring 65.
  • On a pump housing system for the diaphragm bead 51 can thus be dispensed with and accurate positioning of the diaphragm 4 in the radial direction is not required.
  • the diaphragm 4 with a center axis M in the radial direction with respect to the central axis M in a certain margin be mounted without the function of the diaphragm pump 2 is affected.
  • This scope is illustrated in particular by the arrows R in Fig. 7a.
  • the necessary for a proper pump function radial support of the membrane is not carried out by supporting tensile forces on the pump housing system, which makes an accurate, complicated positioning of the membrane during assembly unnecessary.
  • the support ring 65 has axial projections 66, 67 on a top 68 and a bottom 69, which serve for the axial positioning of the support ring 65 during the vulcanization. Additional radial positioning during vulcanization is achieved by circumferentially distributed radially aligned projections 70.
  • the distance x between the schematically illustrated pump housing components, pump housing 5 and working space cover 6 is adjustable, whereby in particular the dead space of the diaphragm pump 2 can be optimized and manufacturing or Mounting tolerances can be compensated.
  • a possible position tolerance r is shown in Fig. 7b, which results from different distances ri and T 2 of the diaphragm bead 51 from the pump housing 5 and the working space cover 6.
  • Fig. 8 shows a section of a second Embodiment of a diaphragm pump 1 according to the invention in longitudinal section. This differs from the first exemplary embodiment according to FIGS. 2, 3, 5 to 7 substantially in the design of the membrane 4, so that only the differences will be discussed below. The remaining components are designed identically.
  • the means for radial support of the membrane 4 is provided in this embodiment as a separate component, which is designed as a ring member 72 with a radially inwardly formed, circumferential edge 72.
  • the ring element 71 is inserted before or during assembly of the membrane 4 in the pump housing 5 and can be made, for example, simple and weight-optimized plastic or sheet metal.
  • the radial support of the tensile forces takes place here on the peripheral edge 72.
  • the membrane bead 51 can be adapted to the shape of the peripheral edge 72.
  • the motor-pump unit 1 described above is not limited to the described application of the provision of vacuum. Such units 1 can be used anywhere where gases are to be brought with high efficiency and low noise emissions from a first pressure level to a higher second pressure level.
  • an application of the unit 1 as a compressor is conceivable, in which application preferably the installation direction of the valves is reversed, so that the suction of the air from the interior 28 of the pump housing 5 and the discharge of compressed air via the port 25 takes place.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Pompe à membrane (2) comprenant une membrane (4), en particulier une pompe à membrane (2) d'un groupe pompe-moteur (1) destinée à mettre à disposition une pression pour un dispositif d'actionnement de frein d'une installation de frein de véhicule automobile avec un amplificateur de force de freinage pneumatique, un bourrelet de membrane (51) de la membrane (4) étant monté dans un carter de pompe (5). Afin de permettre un assemblage simple de la pompe à membrane sans mesures de réglage et positionnement de la membrane, des moyens destinés à soutenir radialement la membrane (4) sont prévus, lesquels peuvent être déplacés par rapport au carter de pompe (5) avant le montage de la membrane dans la direction radiale par rapport à un axe médian (M) de la membrane (4).
PCT/EP2007/053920 2006-05-18 2007-04-23 pompe à membrane WO2007134928A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102006023655.6 2006-05-18
DE102006023655 2006-05-18
DE102007005019.6 2007-02-01
DE102007005019A DE102007005019A1 (de) 2006-05-18 2007-02-01 Membranpumpe

Publications (1)

Publication Number Publication Date
WO2007134928A1 true WO2007134928A1 (fr) 2007-11-29

Family

ID=38235227

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/053920 WO2007134928A1 (fr) 2006-05-18 2007-04-23 pompe à membrane

Country Status (2)

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DE (1) DE102007005019A1 (fr)
WO (1) WO2007134928A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016150763A1 (fr) * 2015-03-20 2016-09-29 Continental Teves Ag & Co. Ohg Unité de pompe à moteur pourvue d'une seule membrane élastique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2733355B1 (fr) * 2012-11-15 2019-05-08 Shenzhen Mindray Bio-Medical Electronics Co., Ltd. Élasticité étendue de membrane de pompe avec force de pompe conservée
DE102014220619A1 (de) * 2014-10-10 2016-04-14 Continental Teves Ag & Co. Ohg Motor-Pumpenaggregat
EP4257825A1 (fr) * 2022-04-06 2023-10-11 Goodrich Corporation Diaphragme

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB744873A (en) * 1952-10-29 1956-02-15 Carter Carburetor Corp Diaphragm type fuel pump assembly
DE4136805A1 (de) * 1991-11-08 1993-05-13 Almatec Tech Innovationen Gmbh Doppelmembranpumpe
US6295918B1 (en) * 1999-10-15 2001-10-02 John M. Simmons Suspended diaphragm
DE10233302A1 (de) * 2002-07-22 2004-02-12 Knf Neuberger Gmbh Pumpe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB744873A (en) * 1952-10-29 1956-02-15 Carter Carburetor Corp Diaphragm type fuel pump assembly
DE4136805A1 (de) * 1991-11-08 1993-05-13 Almatec Tech Innovationen Gmbh Doppelmembranpumpe
US6295918B1 (en) * 1999-10-15 2001-10-02 John M. Simmons Suspended diaphragm
DE10233302A1 (de) * 2002-07-22 2004-02-12 Knf Neuberger Gmbh Pumpe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016150763A1 (fr) * 2015-03-20 2016-09-29 Continental Teves Ag & Co. Ohg Unité de pompe à moteur pourvue d'une seule membrane élastique
US10508649B2 (en) 2015-03-20 2019-12-17 Continental Teves Ag & Co. Ohg Motor/pump unit having a single elastic diaphragm

Also Published As

Publication number Publication date
DE102007005019A1 (de) 2007-12-06

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