WO2012025423A1 - Membranpumpe mit trägheitsgesteuertem leckergänzungsventil - Google Patents
Membranpumpe mit trägheitsgesteuertem leckergänzungsventil Download PDFInfo
- Publication number
- WO2012025423A1 WO2012025423A1 PCT/EP2011/064045 EP2011064045W WO2012025423A1 WO 2012025423 A1 WO2012025423 A1 WO 2012025423A1 EP 2011064045 W EP2011064045 W EP 2011064045W WO 2012025423 A1 WO2012025423 A1 WO 2012025423A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- hydraulic chamber
- closing body
- working fluid
- leak
- Prior art date
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
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
-
- 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
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
-
- 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
- F04B43/0081—Special features systems, control, safety measures
-
- 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
- F04B53/10—Valves; Arrangement of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2210/00—Working fluid
- F05B2210/10—Kind or type
- F05B2210/11—Kind or type liquid, i.e. incompressible
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
Definitions
- the present invention relates to a diaphragm pump with a leak-relief valve and to a method of sizing a leak-relief valve.
- Diaphragm pumps generally have a delivery chamber which is separated from a hydraulic chamber by a membrane, wherein the delivery chamber is in each case connected to a suction connection and a pressure connection.
- the filled with working fluid hydraulic chamber can then be acted upon with a pulsating working fluid pressure.
- a pulsating movement of the diaphragm is produced, as a result of which the volume of the pumping chamber becomes periodically larger and smaller.
- a working fluid usually a hydraulic oil is used.
- suitable liquids such as. B. water can be used with a water-soluble mineral additive.
- the medium to be pumped is separated from the drive, whereby on the one hand the drive is shielded from harmful influences of the pumped medium and on the other hand, the fluid from harmful influences of the drive, eg. As impurities, is shielded.
- the pulsating working fluid pressure is often provided by means of a movable piston in contact with the working fluid.
- the piston is z. B. in a hollow cylindrical member moves back and forth, whereby the volume of the hydraulic space is reduced and increased, which leads to an increase and decrease in the pressure in the hydraulic chamber and in consequence to a movement of the membrane.
- each stroke a small amount of working fluid is lost through the narrow remaining gap between the piston and hollow cylindrical element, which gradually the working fluid in the hydraulic chamber is reduced. This has the consequence that the pressure stroke is no longer completely filled by the membrane, since not enough working fluid for pressure movement of the membrane is available. Therefore, it has already been proposed, for example, in DE 1034030, the hydraulic space with the interposition of a valve, a so-called leak-supplementing valve to connect to a working fluid reservoir.
- the leak-relief valve generally has a between a closed position in which the valve passage is decided and in an open position in which the valve passage is open, reciprocable closing body, z. B. in the form of a closing ball on.
- This closing body is by means of a pressure element, for. B. a spring, biased in the closed position.
- This pressure element is designed such that only when the pressure in the hydraulic chamber is less than a set pressure p L , the closing body moves in the direction of the open position.
- the set pressure p L must be set such that no liquid can reach the hydraulic chamber via the leak-relief valve during the suction stroke. Only at the end of the suction stroke, when the piston barely moves, should any refilling fluid be refilled via the leak-relief valve. It should be noted that the maximum pressure prevails at the end of the pressure stroke in the pumping chamber. If the suction stroke is now started, the membrane will move in the direction of the hydraulic chamber until the pressure in the delivery chamber has fallen to the static pressure at the suction connection.
- the set pressure p L In order to prevent that the leak-relief valve opens during this pressure surge and thus working fluid can flow into the hydraulic chamber, the set pressure p L must be set correspondingly small, which means that the pressure element of the leak-relief valve must be relatively large.
- This object is achieved by a membrane pump mentioned above, in which the mass of the closing body is so large that the closing body at a lasting not more than a millisecond surge due to a pressure drop in the hydraulic space by not more than 0.2 mm in the direction of Open position moves.
- the closing body is now designed such that its mass and thus its mass inertia is so great that, in the event of such a pressure surge, the closing body can not move more than 0.2 mm in the direction of the open position due to the mass inertia. Since after one millisecond the pressure has already risen again, the movement of the closing body is stopped.
- a movement of the closing body is less than 0.2 mm so small that the resulting opening gap for the working fluid is too small to convey a significant amount of working fluid in the hydraulic chamber. If the small amount should nevertheless be disadvantageous, it is provided in a preferred embodiment that the closing body moves by not more than 0.1 mm in the direction of the open position with a pressure surge lasting no more than one millisecond due to a pressure drop in the hydraulic space.
- the pressure in the hydraulic chamber does not drop to 0 bar, but to a minimum pressure p min .
- This minimum pressure p min depends on the selected process parameters, such. B. the static pressure at the pump suction port, the speed of the piston and the volumes of the hydraulic chamber and the delivery chamber from.
- the object mentioned at the outset is achieved in that the mass of the closing body is selected such that the closing body does not become more than 0 when the pressure surge persists for no more than one millisecond due to a pressure drop in the hydraulic space. 2 mm, preferably not moved by more than 0.1 mm in the direction of the open position.
- FIG. 1 shows a partial sectional view of a diaphragm pump of the prior art
- Figure 2 shows the pressure curve in the hydraulic chamber during the suction stroke
- Figure 3 is a sectional view of a leak-relief valve according to an embodiment of the invention.
- FIG. 1 the essential parts of a diaphragm pump are shown in a partial sectional view.
- the membrane pump has a membrane 1, which separates the hydraulic chamber 8 from the delivery chamber 9.
- the delivery chamber 9 is connected via corresponding check valves with a Saugan- connected and a pressure connection.
- the hydraulic chamber 8 can be acted upon by means of the piston 3 with a pulsating working fluid pressure.
- the membrane 1 is connected to a mounted in an installation space 13 spring 10, which ensures that the membrane is biased in the direction of the hydraulic chamber. Due to the pulsating pressure of the working fluid, the membrane is also moved back and forth between the walls 4 and 7, whereby the volume of the delivery chamber is increased and decreased.
- the delivery fluid in the delivery chamber is discharged via the check valve at the pressure outlet. If the volume of the delivery chamber increases due to a return movement of the diaphragm 1, delivery fluid is drawn in via the check valve from the suction connection. As a result of the periodic movement of the membrane, delivery fluid is periodically sucked from the suction connection and discharged via the pressure connection at higher pressure.
- the membrane is held between the clamping edges 1 1, 12. Due to the return spring 10 may cause a bulging of the membrane 1, which is represented by the dashed lines 14.
- a leak-relief valve 6 is provided, via which the hydraulic space 8 is connected to a working fluid reservoir 15.
- This leak relief valve has a small ball which is pressed in a valve seat by means of a spring.
- the set pressure p L is set.
- the ball of the leak relief valve lifts off the valve set and additional working fluid can flow into the hydraulic chamber 8 from the working fluid reservoir 15, which is generally below atmospheric pressure (1 bar) the pressure in the hydraulic chamber 8 has risen above the set pressure p L , since then the spring of the leak-relief valve 6 pushes the ball back into the valve seat and thus closes the valve passage.
- the pressure in the hydraulic chamber during the suction stroke is plotted over time.
- the pressure in the hydraulic chamber corresponds approximately to the pressure with which the pump discharges the delivery fluid from the pressure connection. This pressure is significantly higher than the static pressure of the suction line. It is understood that the pressure in the hydraulic chamber is additionally determined by the return spring 10. However, this pressure difference is not considered below because it is not relevant to the invention.
- the suction stroke begins when the piston 3 is moved back, that is, in the embodiment shown in Figure 1 is moved to the right. This initially leads to the fact that the pressure in the hydraulic chamber slowly reduced and since the pressure in the pumping chamber is greater, the membrane will move to the right, ie in the direction of the hydraulic chamber.
- the set pressure p L can be significantly larger than p min be selected as long as p L is smaller than an average pressure P m in the hydraulic chamber.
- the invention is based on the finding that the pressure surge occurs only during a very short time interval Ats ⁇ 1 millisecond.
- the mass of the closing body is inventively chosen so large that such a pressure surge only leads to a stroke of less than 0.2 mm or preferably less than 0, 1 mm.
- FIG. 1 An inventive leak-relief valve is shown in FIG.
- This leak-relief valve has a closing body 16 accommodated in a valve body 18, which has a closing element 20 which, in the closed position, closes a bore in the valve body 18, so that the line to the working-fluid reservoir 19 is separated from the hydraulic space 8.
- the closing body is biased by means of a spring element 17 in the closed position, which is shown in Figure 3.
- the pressure of the working fluid in the working fluid reservoir and thus the pressure in the conduit 19 remains substantially constant.
- the closing body 16 is moved upward in the position shown in FIG. 3, so that a connection between the line 19 and the hydraulic chamber 8 is opened.
- the mass of the closing body must be at least 17.5 g to prevent movement of the closing body by more than 0.1 mm.
- the closing body does not move so far that a significant amount of working fluid leaking into the hydraulic chamber.
- the described method can be improved even if one considers that the pressure surge generally does not lead to a pressure reduction to 0 bar, but only to a minimum pressure p min .
- the difference p L - p m between the set pressure p L and the minimum pressure p min due to the surge can be used, whereby the mass can be further reduced.
- the set pressure p L can be increased, whereby the spring 17 can be made weaker, which simplifies the handling of the pump.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2808388A CA2808388C (en) | 2010-08-26 | 2011-08-15 | Membrane pump having an inertially controlled leakage compensation valve |
CN201180040469.2A CN103154517B (zh) | 2010-08-26 | 2011-08-15 | 具有惯性控制的泄漏补偿阀的隔膜泵 |
JP2013525247A JP5862903B2 (ja) | 2010-08-26 | 2011-08-15 | 慣性制御式漏出補償弁を有する膜ポンプ |
KR1020137006053A KR20130138194A (ko) | 2010-08-26 | 2011-08-15 | 관성적으로 제어되는 누출 보상 밸브를 가지는 멤브레인 펌프 |
BR112013004584A BR112013004584A2 (pt) | 2010-08-26 | 2011-08-15 | bomba de membrana com uma válvula de extensão de vazamento controlada por inércia |
RU2013113209/06A RU2573069C2 (ru) | 2010-08-26 | 2011-08-15 | Мембранный насос, снабженный клапаном пополнения утечек с инерционным управлением |
US13/818,119 US20130209280A1 (en) | 2010-08-26 | 2011-08-15 | Membrane Pump Having an Inertially Controlled Leakage Compensation Valve |
EP11745539.4A EP2609332A1 (de) | 2010-08-26 | 2011-08-15 | Membranpumpe mit trägheitsgesteuertem leckergänzungsventil |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010039829.2 | 2010-08-26 | ||
DE102010039829A DE102010039829A1 (de) | 2010-08-26 | 2010-08-26 | Membranpumpe mit trägheitsgesteuertem Leckergänzungsventil |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012025423A1 true WO2012025423A1 (de) | 2012-03-01 |
Family
ID=44630450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/064045 WO2012025423A1 (de) | 2010-08-26 | 2011-08-15 | Membranpumpe mit trägheitsgesteuertem leckergänzungsventil |
Country Status (10)
Country | Link |
---|---|
US (1) | US20130209280A1 (de) |
EP (1) | EP2609332A1 (de) |
JP (1) | JP5862903B2 (de) |
KR (1) | KR20130138194A (de) |
CN (1) | CN103154517B (de) |
BR (1) | BR112013004584A2 (de) |
CA (1) | CA2808388C (de) |
DE (1) | DE102010039829A1 (de) |
RU (1) | RU2573069C2 (de) |
WO (1) | WO2012025423A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016225512A1 (de) | 2016-12-20 | 2018-06-21 | Volkswagen Aktiengesellschaft | Kraftstofftanksystem und Verfahren zur Prüfung der Dichtheit eines solchen Kraftstofftanksystems |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2722575B1 (de) * | 2012-10-16 | 2017-08-30 | Water Powered Technologies Limited | Gasfederakkumulator |
DE102014002720B4 (de) | 2013-04-04 | 2023-10-12 | Mann+Hummel Gmbh | Pumpe zum Fördern eines Fluids |
DE102013105072A1 (de) * | 2013-05-16 | 2014-11-20 | Prominent Gmbh | Membranpumpe mit Lagensteuerung |
US10267303B2 (en) | 2013-08-30 | 2019-04-23 | Flow Control Llc. | High viscosity portion pump |
FR3012538B1 (fr) * | 2013-10-30 | 2018-05-18 | Dosatron International | Pompe a membrane et dispositif a clapets pour une telle pompe |
EP3152440B1 (de) | 2014-06-06 | 2024-03-27 | Flow Control LLC. | Bag-in-box (bib)-pumpe mit einzelkolbenfundament |
DE102017122270B4 (de) * | 2017-09-26 | 2020-09-10 | Prominent Gmbh | Membranpumpe mit einer funktionssicheren Membranlagensteuerung |
EP4325053A1 (de) * | 2019-01-10 | 2024-02-21 | PSG California LLC | Luftbetriebene pumpe mit leckerkennung und schutzeinrichtung |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1034030B (de) | 1955-09-22 | 1958-07-10 | Reiners Walter Dr Ing | Membranpumpe fuer nicht schmierende und chemisch aggressive Fluessigkeiten, insbesondere zur Schaedlingsbekaempfung in der Landwirtschaft |
US5655894A (en) * | 1994-06-15 | 1997-08-12 | Lewa Herbert Ott Gmbh & Co. | Controlled prevention of premature snuffle valve actuation in high pressure membrane pumps |
EP1099853A2 (de) * | 1999-11-12 | 2001-05-16 | Nikkiso Co., Ltd. | Schutzvorrichtung gegen Membranbruch in einer Membranpumpe |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3680981A (en) * | 1970-12-21 | 1972-08-01 | Josef Wagner | Pump and method of driving same |
DE3039915A1 (de) * | 1980-10-23 | 1982-05-27 | Robert Bosch Gmbh, 7000 Stuttgart | Elektrisch ansteuerbare ventileinrichtung |
EP0055467B1 (de) * | 1980-12-29 | 1984-12-05 | LEWA Herbert Ott GmbH + Co. | Membranpumpe mit druckentlastet eingespannter Membran |
US4365745A (en) * | 1981-02-05 | 1982-12-28 | Louis Beck | Diaphragm pump |
DE3446952A1 (de) * | 1984-12-21 | 1986-07-10 | Lewa Herbert Ott Gmbh + Co, 7250 Leonberg | Membranpumpe mit umlaufspuelung |
DE3546189A1 (de) * | 1985-12-27 | 1987-07-02 | Ott Kg Lewa | Verfahren und vorrichtung zur durchflussmessung bei oszillierenden verdraengerpumpen |
CN2071714U (zh) * | 1989-02-28 | 1991-02-20 | 王松涛 | 引液自流器 |
BR9002787A (pt) * | 1990-06-08 | 1991-12-10 | Brasil Compressores Sa | Valvula para compressor hermetico |
DE4141670C2 (de) * | 1991-12-17 | 1994-09-29 | Ott Kg Lewa | Hydraulisch angetriebene Membranpumpe mit Membranhubbegrenzung |
CN2172358Y (zh) * | 1993-08-06 | 1994-07-20 | 机械电子工业部合肥通用机械研究所 | 液压隔膜泵用隔膜最大挠曲机械式自控机构 |
RU2079715C1 (ru) * | 1994-05-06 | 1997-05-20 | Акционерное общество открытого типа Рязанское научно-техническое акционерное предприятие "Нефтехиммашсистемы" | Мембранный гидроприводной дозировочный насос |
DE10308421A1 (de) * | 2003-02-27 | 2004-09-09 | Leybold Vakuum Gmbh | Kolbenpumpe, vorzugsweise Kolbenvakuumpumpe, mit Auslassventil |
DE10322221B3 (de) * | 2003-05-16 | 2005-01-27 | Lewa Herbert Ott Gmbh + Co | Leckageüberwachung im Hydraulikdruckraum einer Membranpumpe |
RU38365U1 (ru) * | 2004-01-30 | 2004-06-10 | Подрезов Александр Владимирович | Мембранный гидроприводной дозировочный насос |
JP4413741B2 (ja) * | 2004-10-14 | 2010-02-10 | 日機装株式会社 | ダイアフラムポンプ |
DE102007057945B4 (de) * | 2007-12-01 | 2009-11-05 | Knf Neuberger Gmbh | Mehrstufige Membran-Saugpumpe |
-
2010
- 2010-08-26 DE DE102010039829A patent/DE102010039829A1/de not_active Withdrawn
-
2011
- 2011-08-15 EP EP11745539.4A patent/EP2609332A1/de not_active Withdrawn
- 2011-08-15 JP JP2013525247A patent/JP5862903B2/ja not_active Expired - Fee Related
- 2011-08-15 WO PCT/EP2011/064045 patent/WO2012025423A1/de active Application Filing
- 2011-08-15 BR BR112013004584A patent/BR112013004584A2/pt not_active Application Discontinuation
- 2011-08-15 RU RU2013113209/06A patent/RU2573069C2/ru not_active IP Right Cessation
- 2011-08-15 CN CN201180040469.2A patent/CN103154517B/zh active Active
- 2011-08-15 CA CA2808388A patent/CA2808388C/en active Active
- 2011-08-15 KR KR1020137006053A patent/KR20130138194A/ko not_active Application Discontinuation
- 2011-08-15 US US13/818,119 patent/US20130209280A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1034030B (de) | 1955-09-22 | 1958-07-10 | Reiners Walter Dr Ing | Membranpumpe fuer nicht schmierende und chemisch aggressive Fluessigkeiten, insbesondere zur Schaedlingsbekaempfung in der Landwirtschaft |
US5655894A (en) * | 1994-06-15 | 1997-08-12 | Lewa Herbert Ott Gmbh & Co. | Controlled prevention of premature snuffle valve actuation in high pressure membrane pumps |
EP1099853A2 (de) * | 1999-11-12 | 2001-05-16 | Nikkiso Co., Ltd. | Schutzvorrichtung gegen Membranbruch in einer Membranpumpe |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016225512A1 (de) | 2016-12-20 | 2018-06-21 | Volkswagen Aktiengesellschaft | Kraftstofftanksystem und Verfahren zur Prüfung der Dichtheit eines solchen Kraftstofftanksystems |
WO2018114408A1 (de) | 2016-12-20 | 2018-06-28 | Volkswagen Aktiengesellschaft | Kraftstofftanksystem und verfahren zur prüfung der dichtheit eines solchen kraftstofftanksystems |
Also Published As
Publication number | Publication date |
---|---|
CA2808388C (en) | 2018-02-20 |
JP2013536364A (ja) | 2013-09-19 |
BR112013004584A2 (pt) | 2016-09-06 |
RU2573069C2 (ru) | 2016-01-20 |
CN103154517A (zh) | 2013-06-12 |
KR20130138194A (ko) | 2013-12-18 |
RU2013113209A (ru) | 2014-10-10 |
JP5862903B2 (ja) | 2016-02-16 |
CN103154517B (zh) | 2016-01-20 |
US20130209280A1 (en) | 2013-08-15 |
CA2808388A1 (en) | 2012-03-01 |
DE102010039829A1 (de) | 2012-03-01 |
EP2609332A1 (de) | 2013-07-03 |
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