WO2001094795A1 - Procede pour le reglage du debit aspire dans un generateur de vide et generateur de vide a debit ajustable - Google Patents
Procede pour le reglage du debit aspire dans un generateur de vide et generateur de vide a debit ajustable Download PDFInfo
- Publication number
- WO2001094795A1 WO2001094795A1 PCT/FR2001/001761 FR0101761W WO0194795A1 WO 2001094795 A1 WO2001094795 A1 WO 2001094795A1 FR 0101761 W FR0101761 W FR 0101761W WO 0194795 A1 WO0194795 A1 WO 0194795A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nozzle
- mixer
- generator
- vacuum
- vacuum generator
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/48—Control
- F04F5/52—Control of evacuating pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
- F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
- F04F5/22—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating of multi-stage type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
- F04F5/461—Adjustable nozzles
Definitions
- the present invention relates to a method for adjusting the flow rate drawn into a vacuum generator as well as a vacuum generator, in particular for implementing the above-mentioned method.
- the vacuum generators known to date comprise at least one nozzle and a mixer communicating respectively with a vacuum chamber, as well as a body serving to maintain the position of the nozzle and the mixer.
- the one-piece design of the nozzle and the mixer respectively makes it possible to obtain, for a nozzle-mixer couple, a unique characteristic of flow rate and vacuum level. Changing the characteristics of the generator in terms of flow requires modifying the nozzle and the mixer. This results in the need to have a stock of nozzles and mixers of various passage sections. Furthermore, the large number of parts of the generator generates relatively long assembly and adjustment times.
- the purpose of the present invention is to provide a vacuum generator whose design makes it possible to make vary easily and quickly over a wide range the flow rate drawn into the generator vacuum chamber while reducing the number of part numbers in stock.
- Another object of the present invention is to provide a vacuum generator whose design allows precise adjustment on demand of the flow rate to be sucked into the generator vacuum chamber.
- Another object of the present invention is to provide a method for adjusting the flow rate to be sucked into the vacuum chamber of a generator, this process being simple to implement while allowing precise adjustment of the flow rate over a large flow range .
- the subject of the invention is a method for adjusting the flow rate drawn into a vacuum generator of the type comprising at least one nozzle and a compressed air mixer communicating with a vacuum chamber, characterized in that forms the nozzle and / or the mixer by assembly by a joint plane of at least two elements and in that one varies, if necessary, according to the choice of the flow rate to be sucked into the vacuum chamber, the geometry of the compressed air nozzle and / or the mixer in the direction of an increase in the passage section by insertion into said joint plane of at least one spacer.
- the generator nozzle can have a shape other than cylindrical without adversely affecting the performance of the generator.
- Another subject of the invention is a vacuum generator, this generator comprising at least one nozzle and a compressed air mixer communicating with a vacuum chamber, characterized in that the nozzle and / or the mixer are formed from at least two elements which can be assembled by a joint plane to allow the possible insertion in said joint plane of at least one spacer, this spacer allowing a modification of the section *: for passage of the nozzle and / or of the mixer depending on the choice of the flow rate to be sucked into the vacuum chamber.
- Figure 1 shows a longitudinal sectional view of a vacuum generator according to one invention without interposition of spacer in the joint plane
- FIG. 2 represents a view in longitudinal section of a vacuum generator according to the invention with the interposition of several spacers in the joint plane;
- Figure 3 shows a perspective view of a component of the vacuum generator
- FIG. 4 represents a top view of a spacer in the form of a perforated plate
- FIG. 5 represents a perspective view of a vacuum generator in the assembled state of the elements constituting it, a spacer having been inserted in the joint plane.
- the vacuum generator represented under the general reference 1, comprises at least one nozzle 2 and a mixer 3 of compressed air communicating respectively with a vacuum chamber 4.
- a compressed air supply chamber of the nozzle 2 is positioned upstream of the nozzle while an exhaust chamber is provided downstream of the mixer 3.
- the nozzle 2 and the mixer 3 are formed from at least two elements 7A, 7B which can be assembled by a joint plane 9 to allow possible insertion into the joint plane 9 of at least a spacer 8.
- This spacer 8 allows a modification of the passage section of the nozzle 2 and / or of the mixer 3 according to the choice of the flow rate to be sucked into the vacuum chamber 4.
- the spacer 8 has an internal profile similar to that of the nozzle 2 and / or of the mixer 3.
- the internal profile of the spacer 8 is defined to allow a simultaneous and corresponding variation of the passage section. nozzle 2 and mixer 3 while maintaining a constant ratio between the nozzle 2 and mixer 3 passage sections.
- the ratio between the nozzle 2 and mixer 3 passage sections defines the vacuum level. This level should preferably be kept constant.
- the variation in the passage sections of the nozzle 2 and of the mixer 3 makes it possible to increase or reduce the flow rate to be sucked into the vacuum chamber 4. Consequently, when designing a vacuum generator, the ratio of the nozzle 2 - mixer 3 sections is selected to determine a vacuum level and then the passage section of the nozzle 2 and of the mixer 3 is varied accordingly. obtain for this constant determined vacuum level a regulation of the flow rate sucked into the vacuum chamber 4 as a function of the passage sections chosen.
- spacers 8 can affect a large number of shapes, in the examples shown, these spacers 8 affect the shape of profiled plates. In practice, these plates have perforations or through openings corresponding at least to the profile of the nozzle 2 and of the mixer 3.
- each element 7A, 7B constituting the generator and assembled by a joint plane 9 each time forms a monobloc assembly comprising at least one nozzle part 2 and a mixer part 3.
- This design of each constituent element makes it possible to reduce assembly and adjustment times.
- each element 7A, 7B, constituting the generator 1, and assembled by a joint plane 9 comprises, upstream of the nozzle 2, at least part of a chamber 5 d compressed air supply to the nozzle 2 and, downstream of the mixer 3, at least part of an exhaust chamber 6. It should be noted that, above, by constituent element means each element entering into the constitution of the generator 1.
- the vacuum generator 1 consists of two basic elements 7A, 7B which can be assembled by a joint plane 9 into which at least one spacer 8 can be inserted, each element 7A, 7B basic affecting the shape of a half-shell, as shown in Figure 3.
- the half-shells in the assembled state thus constitute a generator 1 which corresponds to the smallest passage section of the nozzle 2 and of the mixer 3 for a given vacuum level.
- the basic constituent elements of the generator could consist of simple plates with smooth faces participating in the production of the nozzle and / or mixer conduit formed in the spacer.
- the vacuum generator formed by simple stacking of elements becomes extremely easy to manufacture and assemble. Indeed, each element of the stack can be provided with guides or markers to facilitate its positioning. Furthermore, this design of the generator in the form of a stacking assembly makes it possible to obtain a very modular generator.
- Such a vacuum generator can be made from metal parts or parts made of synthetic material.
- provision may be made for the interposition of one or more spacers.
- the manufacturer can decide to produce standard spacer plates so that the passage section of the nozzle and / or of the mixer will vary depending on the number of spacers inserted in said joint plane 9.
- it can be decided to make the spacers in the form of a profile cut to the demand function of the thickness d 1 desired spacer.
- the number of part numbers to be stored can in certain cases be limited to two, one corresponding to the basic component of the generator, the other to one spacer. This is only possible if the basic constituent elements of the generator which can be assembled by a joint plane are two identical elements, the joint plane constituting a plane of symmetry of said elements.
- the basic constituent elements of the generator comprise on their external face the inputs necessary for the proper functioning of the vacuum generator such as a compressed air inlet opening into the chamber 5 for supplying compressed air to the nozzle 2 and an inlet d air emerging in the vacuum chamber 4.
- this vacuum generator may include an outlet communicating with the exhaust chamber 6 of the vacuum generator 1.
- Maintaining the assembled state of all the constituent elements of the vacuum generator may be effected by any means such as the use of screw-type fixing members or the like, the use of adhesive means such as glue or the like.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01943581A EP1295040A1 (fr) | 2000-06-09 | 2001-06-07 | Procede pour le reglage du debit aspire dans un generateur de vide et generateur de vide a debit ajustable |
US10/297,720 US20040052646A1 (en) | 2000-06-09 | 2001-06-07 | Method for adjusting flow rate exhausted into a vacuum generator and vacuum generator with adjustable flow rate |
AU2001266125A AU2001266125A1 (en) | 2000-06-09 | 2001-06-07 | Method for adjusting flow rate exhausted into a vacuum generator and vacuum generator with adjustable flow rate |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0007411A FR2810080B1 (fr) | 2000-06-09 | 2000-06-09 | Procede pour le reglage du debit aspire dans un generateur de vide et generateur de vide a debit ajustable |
FR00/07411 | 2000-06-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001094795A1 true WO2001094795A1 (fr) | 2001-12-13 |
Family
ID=8851141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/001761 WO2001094795A1 (fr) | 2000-06-09 | 2001-06-07 | Procede pour le reglage du debit aspire dans un generateur de vide et generateur de vide a debit ajustable |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040052646A1 (fr) |
EP (1) | EP1295040A1 (fr) |
AU (1) | AU2001266125A1 (fr) |
FR (1) | FR2810080B1 (fr) |
WO (1) | WO2001094795A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102016540A (zh) | 2008-04-11 | 2011-04-13 | 梅索斯卡莱科技公司 | 分析装置、方法和试剂 |
DE202009019074U1 (de) | 2009-11-24 | 2016-05-23 | J. Schmalz Gmbh | Druckluftbetriebener Unterdruckerzeuger |
CA3107353A1 (fr) | 2013-01-04 | 2014-07-10 | Meso Scale Technologies, Llc. | Appareils, procedes et reactifs de dosage |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0297550A1 (fr) * | 1987-06-29 | 1989-01-04 | Thilo Volkmann | Pompe à jet |
EP0346314A2 (fr) * | 1988-06-08 | 1989-12-13 | Peter Tell | Dispositif à éjecteur à vide |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9210497U1 (de) * | 1992-08-06 | 1993-12-09 | Volkmann Thilo | Ejektorpumpe |
-
2000
- 2000-06-09 FR FR0007411A patent/FR2810080B1/fr not_active Expired - Fee Related
-
2001
- 2001-06-07 AU AU2001266125A patent/AU2001266125A1/en not_active Abandoned
- 2001-06-07 WO PCT/FR2001/001761 patent/WO2001094795A1/fr not_active Application Discontinuation
- 2001-06-07 EP EP01943581A patent/EP1295040A1/fr not_active Withdrawn
- 2001-06-07 US US10/297,720 patent/US20040052646A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0297550A1 (fr) * | 1987-06-29 | 1989-01-04 | Thilo Volkmann | Pompe à jet |
EP0346314A2 (fr) * | 1988-06-08 | 1989-12-13 | Peter Tell | Dispositif à éjecteur à vide |
Also Published As
Publication number | Publication date |
---|---|
FR2810080A1 (fr) | 2001-12-14 |
AU2001266125A1 (en) | 2001-12-17 |
FR2810080B1 (fr) | 2002-09-06 |
US20040052646A1 (en) | 2004-03-18 |
EP1295040A1 (fr) | 2003-03-26 |
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