WO2006058801A1 - Diaphragm pump and diaphragm for a diaphragm pump - Google Patents

Diaphragm pump and diaphragm for a diaphragm pump Download PDF

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Publication number
WO2006058801A1
WO2006058801A1 PCT/EP2005/054620 EP2005054620W WO2006058801A1 WO 2006058801 A1 WO2006058801 A1 WO 2006058801A1 EP 2005054620 W EP2005054620 W EP 2005054620W WO 2006058801 A1 WO2006058801 A1 WO 2006058801A1
Authority
WO
WIPO (PCT)
Prior art keywords
membrane
pump
diaphragm
characterized
body
Prior art date
Application number
PCT/EP2005/054620
Other languages
German (de)
French (fr)
Inventor
Bodo Grebner
Original Assignee
Robert Bosch 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
Priority to DE102004057688.2 priority Critical
Priority to DE102004057688A priority patent/DE102004057688A1/en
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2006058801A1 publication Critical patent/WO2006058801A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009Special features
    • F04B43/0054Special features particularities of the flexible members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/16Selection of particular materials
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/02Adding substances to exhaust gases the substance being ammonia or urea
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1433Pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066Selective catalytic reduction [SCR]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection
    • Y02A50/20Air quality improvement or preservation
    • Y02A50/23Emission reduction or control
    • Y02A50/232Catalytic converters
    • Y02A50/2322Catalytic converters for exhaust after-treatment of internal combustion engines in vehicles
    • Y02A50/2325Selective Catalytic Reactors [SCR]

Abstract

The invention relates to a diaphragm pump comprising an eccentric drive for the diaphragm (10) of said diaphragm pump, in addition to a conveyor chamber (23) for a medium and an aggregate chamber (24) which is separated from the conveyor chamber (23) by the diaphragm (10) of the diaphragm pump. According to the invention, the diaphragm (10) of the diaphragm pump has a metallic diaphragm body (11). The invention also relates to a diaphragm (10) for a diaphragm pump.

Description


  [0001] Diaphragm pump and membrane pump membrane

State of the art

The invention is based on a membrane pump and a membrane pump membrane according to the preambles of claims 1 and 7.

During the combustion process of diesel and gasoline engines, toxic gases such as nitrogen oxides NOx are formed. For the removal or decomposition of these nitrogen oxides has already been proposed to inject urea into the vehicle-side catalyst.

   Since urea is a chemically aggressive and prone to crystallization medium, which also tends to creep, membrane feed pumps have been proposed to promote it, which are advantageous for such substances.

In diaphragm pumps, the medium does not come into contact with the drive units, the delivery chamber is separated from the unit space by the membrane. Usually, the promotion takes place by an up and down stroke of the acted upon with a plunger membrane. Thus, however, the achievable pressures of the diaphragm pump are limited, while in urea production rather higher pressures are desirable.

   However, to provide higher delivery pressures complex and robust designs are necessary, which are not easily represented with conventional diaphragm pumps.

Advantages of the invention

It is proposed that a membrane pump has a membrane pump membrane with a metallic membrane body. In contrast to conventional membranes made of rubber or fabric films, the membrane body is very robust. The diaphragm pump can continue to operate at a significantly higher delivery pressure, in particular above 5 bar, and has an improved service life for its diaphragm pump diaphragm, which is significantly above the 10,000 hours usual with rubber diaphragms.

   The membrane pump is inexpensive to produce and particularly suitable for use in urea-based Entstickungssystemen of motor vehicles.

Preferably, the membrane body is formed of corrosion-resistant steel. This is favorable if, with a correspondingly long service life, aggressive media such as urea are to be conveyed. Preference is given to a chromium-nickel steel.

Is to actuate the diaphragm pump diaphragm, a plunger bolt connected to the membrane body, a pressurization for performing the media promotion can be easily performed, in particular, the plunger bolt is connected to an eccentric.

Conveniently, the plunger bolt is welded to the membrane body. The plunger bolt is preferably fastened by means of laser welding.

   This results in a durable connection with a long service life.

If the membrane body has a concentric, corrugated structure, the service life can be further improved. The beads cause a vibration behavior of the membrane pump membrane, which is well suited for continuous use.

Furthermore, a membrane pump diaphragm for a diaphragm pump with eccentric is proposed, the membrane body is formed of metal. Preferably, the membrane body is formed of corrosion-resistant steel. Especially when used in conveying chemically aggressive media such a membrane pump membrane shows a significantly improved lifetime compared to conventional membranes made of rubber or fabric films.

   Furthermore, such membrane pump membranes can be loaded with increased delivery pressures or back pressures.

Preferably, the membrane body has a concentric, wave-like structure. As a result, vibration characteristics of the membrane body are advantageously influenced, in particular in a normal up and down movement in operation with respect to the central axis of the disk-shaped membrane body.

It is advantageous if a curvature of the corrugations of the structure is designed so that forms at a normal periodic loading of the membrane body with driving force in the axial direction, a fatigue stress in the elastic range. The membrane body is only loaded elastically shortening life-shortening, inelastic deformations avoided.

   It can-- A -

[0015] NEN advantageous lifetimes are achieved, which correspond to permanently stressed springs.

If the membrane body has a plunger bolt in its center, a connection to an eccentric drive in use of the membrane pump diaphragm can be produced without great effort, as is usual in conventional diaphragm pumps.

Conveniently, the plunger pin is arranged in a cup-shaped, convex to the plunger bolt bulge of the membrane body.

   This arrangement provides a reliable diversion of dynamic forces in a conventional use of the diaphragm pump diaphragm.

Preferably, the plunger bolt is fixedly connected to the membrane body, preferably the plunger bolt is welded to the membrane body.

Drawings

The invention will be explained in more detail in an embodiment with reference to the accompanying drawings. Show it:

1 shows a section through a preferred membrane pump membrane with plunger bolts. Figure 2 is a plan view of a preferred membrane body with concentric, besickter structure. and Fig. 4 shows schematically a preferred diaphragm pump.

   Description of the embodiment

Figure 1 shows a section through a preferred membrane pump membrane 10 with a plunger pin 12 which is arranged in the center 16 of its membrane body 11 and extending in the axial direction of the surface of the disc-shaped membrane pump membrane 10. The membrane pump membrane 10 physically separates a delivery chamber 23 for a medium and a separate from the delivery chamber 23 unit space 24 of a diaphragm pump 20 with an eccentric, as is roughly sketched schematically in Figure 3.

   Drive units or valves, etc. are not shown.

A promotion of the medium, which is indicated by arrows at an inlet 21 and an outlet 22 of the delivery chamber 23 of the diaphragm pump 20, carried by an up and down movement of the plunger 12 by an eccentric 13, as shown by the double arrow in the figure 3 , The membrane pump membrane 10 is thereby raised and lowered. When lifting the medium is sucked through the inlet 21 and pushed out of the output 22 when lowering.

   The eccentric drive, which is not further developed, corresponds to a conventional eccentric drive of diaphragm pumps familiar to the person skilled in the art.

As can be further seen in Figure 1, the membrane body 11 has a concentric, wavy-besickened structure 14, wherein a curvature of the beads 15 of the structure 14 is designed so that at a normal periodic loading of the membrane body 11 with driving force in the axial direction 17 forms a fatigue stress in the elastic region.

   At the edge 19 of the membrane body 11 is formed flat to allow easy attachment and sealing in a diaphragm pump housing.

For deflecting the up and down movement of the membrane pump diaphragm 10 of the plunger pin 12 is arranged on a cup-shaped, to the plunger pin 12 convexly formed bulge 18 of the membrane body 11.

The membrane 10 is preferably formed of a metallic membrane body 11, preferably made of corrosion-resistant steel, more preferably of chromium-nickel steel.

In Figure 2 is a plan view of a preferred membrane body 11 is shown, in which its concentric, wavy-edged structure 14 can be clearly seen.

Claims

claims
A membrane pump with an eccentric drive of its membrane pump membrane (10) and a delivery chamber (23) for a medium and a delivery chamber (23) through the membrane pump membrane (10) separate unit space (24), characterized in that the membrane pump membrane
(10) comprises a metallic membrane body (11).
2. Diaphragm pump according to claim 1, characterized in that the membrane body (11) is formed of corrosion-resistant steel.
3. Diaphragm pump according to claim 1 or 2, characterized in that for actuating the membrane pump membrane
(10) a plunger pin (12) is connected to the membrane body (11).
4. Diaphragm pump according to claim 3, characterized in that the plunger pin (12) with an eccentric (13) is connected.
5. Diaphragm pump according to claim 3 or 4, characterized in that the plunger pin (12) with the membrane body
(11) is welded. 6. Diaphragm pump according to one of the preceding claims, characterized in that the membrane body (11) has a concentric, corrugated structure (14).
7. membrane pump diaphragm for a diaphragm pump (20) with an eccentric drive, with a disc-shaped membrane body (11), characterized in that the membrane body (11) is formed of metal.
8. membrane pump membrane according to claim 7, characterized in that the membrane body (11) is formed of corrosion-resistant steel.
9. membrane pump membrane according to claim 7 or 8, characterized in that the membrane body (11) has a concentric, corrugated structure (14).
10. membrane pump diaphragm according to claim 9, characterized in that a curvature of the beads (15) of the structure (14) is designed so that at a normal periodic loading of the diaphragm body (11) with driving force in the axial direction (17) a fatigue stress in elastic range is formed.
11. membrane pump membrane according to one of the preceding claims 7 to 10, characterized in that the
Membrane body (11) in its center (16) has a plunger pin (12). 12. membrane pump membrane according to claim 11, characterized in that the plunger pin (12) in a cup-shaped, to the plunger pin (12) towards convex bulge (18) of the membrane body (11) is arranged.
13. membrane pump membrane according to claim 11 or 12, characterized in that the plunger pin (12) with the membrane body (11) is firmly connected.
14. membrane pump membrane according to one of claims 11 to 13, characterized in that the plunger pin (12) with the membrane body (11) is welded.
PCT/EP2005/054620 2004-11-30 2005-09-16 Diaphragm pump and diaphragm for a diaphragm pump WO2006058801A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102004057688.2 2004-11-30
DE102004057688A DE102004057688A1 (en) 2004-11-30 2004-11-30 Diaphragm pump motor vehicle, has diaphragm with metallic diaphragm body which is formed from corrosion-resistant steel, and lifter pin connected with body by welding for actuating diaphragm

Publications (1)

Publication Number Publication Date
WO2006058801A1 true WO2006058801A1 (en) 2006-06-08

Family

ID=35427732

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/054620 WO2006058801A1 (en) 2004-11-30 2005-09-16 Diaphragm pump and diaphragm for a diaphragm pump

Country Status (2)

Country Link
DE (1) DE102004057688A1 (en)
WO (1) WO2006058801A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9084845B2 (en) 2011-11-02 2015-07-21 Smith & Nephew Plc Reduced pressure therapy apparatuses and methods of using same
US9427505B2 (en) 2012-05-15 2016-08-30 Smith & Nephew Plc Negative pressure wound therapy apparatus
US9901664B2 (en) 2012-03-20 2018-02-27 Smith & Nephew Plc Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination
US9956121B2 (en) 2007-11-21 2018-05-01 Smith & Nephew Plc Wound dressing
US10307517B2 (en) 2010-09-20 2019-06-04 Smith & Nephew Plc Systems and methods for controlling operation of a reduced pressure therapy system

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006044253B3 (en) * 2006-09-16 2008-03-27 Thomas Magnete Gmbh Membrane, for a hydraulic membrane pump for diesel exhaust cleaning, has a recess to define the exact delivery dose volume
DE102009028027A1 (en) 2009-07-27 2011-02-03 Robert Bosch Gmbh Fluid feed pump
DE102010042944A1 (en) 2010-10-26 2012-04-26 Robert Bosch Gmbh Working wall element of a fluid conveyor
DE102011089509A1 (en) 2011-12-22 2013-06-27 Robert Bosch Gmbh Conveyor and dosing
DE102013211164A1 (en) 2013-06-14 2014-12-31 Robert Bosch Gmbh Magnetic actuator for a delivery unit
DE102015226463A1 (en) 2015-12-22 2017-06-22 Robert Bosch Gmbh Magnetic actuator for a delivery unit
WO2019019154A1 (en) * 2017-07-28 2019-01-31 深圳市大疆创新科技有限公司 Diaphragm pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB269263A (en) * 1926-01-20 1927-04-20 Reginald Luther Munday A new or improved diaphragm pump
US1927617A (en) * 1930-01-15 1933-09-19 Schmidt Rudolf Piston engine or piston pump
US3722373A (en) * 1969-06-23 1973-03-27 Sybron Corp Differential pressure responsive device of welded construction
EP1536137A1 (en) * 2003-11-25 2005-06-01 Magneti Marelli Powertrain S.p.A. Fuel pump for an internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB269263A (en) * 1926-01-20 1927-04-20 Reginald Luther Munday A new or improved diaphragm pump
US1927617A (en) * 1930-01-15 1933-09-19 Schmidt Rudolf Piston engine or piston pump
US3722373A (en) * 1969-06-23 1973-03-27 Sybron Corp Differential pressure responsive device of welded construction
EP1536137A1 (en) * 2003-11-25 2005-06-01 Magneti Marelli Powertrain S.p.A. Fuel pump for an internal combustion engine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10231875B2 (en) 2007-11-21 2019-03-19 Smith & Nephew Plc Wound dressing
US9956121B2 (en) 2007-11-21 2018-05-01 Smith & Nephew Plc Wound dressing
US10016309B2 (en) 2007-11-21 2018-07-10 Smith & Nephew Plc Wound dressing
US10307517B2 (en) 2010-09-20 2019-06-04 Smith & Nephew Plc Systems and methods for controlling operation of a reduced pressure therapy system
US9084845B2 (en) 2011-11-02 2015-07-21 Smith & Nephew Plc Reduced pressure therapy apparatuses and methods of using same
US10143783B2 (en) 2011-11-02 2018-12-04 Smith & Nephew Plc Reduced pressure therapy apparatuses and methods of using same
US9901664B2 (en) 2012-03-20 2018-02-27 Smith & Nephew Plc Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination
US9545465B2 (en) 2012-05-15 2017-01-17 Smith & Newphew Plc Negative pressure wound therapy apparatus
US9427505B2 (en) 2012-05-15 2016-08-30 Smith & Nephew Plc Negative pressure wound therapy apparatus
US10299964B2 (en) 2012-05-15 2019-05-28 Smith & Nephew Plc Negative pressure wound therapy apparatus

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