EP1055070B1 - Pompe a vide a faible bruit et rendement eleve - Google Patents
Pompe a vide a faible bruit et rendement eleve Download PDFInfo
- Publication number
- EP1055070B1 EP1055070B1 EP99902628A EP99902628A EP1055070B1 EP 1055070 B1 EP1055070 B1 EP 1055070B1 EP 99902628 A EP99902628 A EP 99902628A EP 99902628 A EP99902628 A EP 99902628A EP 1055070 B1 EP1055070 B1 EP 1055070B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam
- movements
- vacuum pump
- main axis
- pistons
- 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.)
- Expired - Lifetime
Links
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
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
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
-
- 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
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/02—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders arranged oppositely relative to main shaft
-
- 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
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B27/0404—Details, component parts specially adapted for such pumps
- F04B27/0414—Cams
Definitions
- the present invention relates to a vacuum pump comprising first and second cylinders of the same diameter in which respective first and second pistons, each of which is moved by an eccentric, delimit respective first and second volumes, each cylinder being with an inlet with a suction check valve and an outlet with a check valve backflow preventer.
- a similar pump is known from US 4,679,994.
- Vacuum pumps of this type which were widely used in industry before the generalization of rotary pumps, have the advantage of being able to constitute pumps dry, requiring no lubrication.
- US patent 2579927 describes a compressor whose pistons work in phase. However, an imbalance between the piston strokes causes undesirable vibrations.
- Japanese patent JP 58067978 describes a compressor with reduced noise level comprising at least minus a pair of pistons mounted symmetrically with respect to the main axis formed by the piston drive axis, but reduced efficiency since the movements suction and delivery of the pistons are the same duration.
- the invention is situated in this context and aims to propose a vacuum pump less generator of vibrations than known pumps and nevertheless having a yield superior.
- the vacuum pump of the invention is essentially characterized in that the cylinders are aligned with each other and arranged symmetrically with respect to a main axis, in that the pistons are simultaneously animated by respective suction movements, symmetrical with respect to the main axis, and for which the first and second volumes grow, and repression movements respective, symmetrical with respect to the main axis, and for which the first and second volumes decrease, and in that the suction and discharge movements have first and second respective durations of which the first is greater than the second.
- each eccentric is produced in the form of a guide on the same cam animated by a movement of uniform rotation around the main axis and accepting this main axis as the axis of even order symmetry, that the suction movements of the pistons result from a rotation of first angular amplitude of the cam, as the displacement movements of the pistons result from a rotation of second angular amplitude of the cam, and that the first angular amplitude is greater than the second angular amplitude.
- the cam can be shaped into a closed curve of order 2 axial symmetry, having a radial dimension of minimum length and a radial dimension of length maximum making between them angles different from 90 degrees.
- angles formed between the radial dimensions of lengths minimum and maximum of the cam have a minimum value at least equal to 70 degrees and a maximum value at most equal to 110 degrees.
- the cam can have a shape derived from an ellipse by anamorphosis or on the contrary present, parallel to its radial dimension of minimum length, a width intermediate greater than the radial dimension of minimum length and less than the radial dimension of maximum length.
- the vacuum pump of the invention comprises, in a known manner, first and second cylinders 1 and 2, of the same diameter D, in which respective first and second pistons 3 and 4 slide tightly.
- Each cylinder 1, 2 is provided with an inlet 11, 21 on which a non-return valve is installed suction 13, 23 and an outlet 12, 22 on which is installed a non-return valve repression 14, 24.
- the inputs 11, 21 are connected to an enclosure 6 which the pump must empty of its gas, and the outputs 12, 22 for example discharge into the atmosphere.
- the first and second pistons 3, 4 are driven by respective eccentrics 51, 52, and delimit respective first and second volumes V1, V2 in cylinders 1 and 2.
- the cylinders 1, 2 are aligned with each other and are arranged symmetrically with respect to a main axis X, which is perpendicular to the plane of the FIGS.
- Each of the pistons 3, 4 is alternately driven by a suction movement such as MA1 and MA2, for which the first and second volumes V1, V2 grow, and with a movement of repression such as MR1 and MR2, for which the first and second volumes V1, V2 decrease.
- suction and delivery movements MA1, MA2 and MR1, MR2 have first and second respective durations different t1, t2, each suction movement MA1, MA2 having a duration t1 greater than the duration t2 of each delivery movement MR1 and MR2.
- each eccentric 51, 52 is produced in the form of a guide on the same cam 5, which is rotated uniform around the main axis X.
- each piston 3, 4 can, for example, be obtained by pressing on the profile of the cam 5 a roller such as 31, 41 secured to this piston in translation, by means of springs such that 7 and 8 working either in compression or in traction as is the case for the realization illustrated in figure 1.
- Cam 5 which rotates around the X axis, also accepts this axis as the axis of symmetry even order, that is to say that the profile of this cam is invariant for a rotation of 2 x PI / N radians around the X axis, N being an even integer.
- the suction movements MA1, MA2 of pistons 3, 4 result from a rotation of first angular amplitude A1 of the cam 5, while the displacement movements MR1, MR2 of the pistons 3, 4 result from a rotation of second angular amplitude A2 of cam 5, the first angular amplitude A1 being greater than the second angular amplitude A2.
- the cam 5 which is in this case conformed to a closed curve of axial symmetry of order 2, has a radial dimension of minimum length L1 and a radial dimension of maximum length L2 making between they have angles A1, A2 other than 90 degrees.
- the cam 5 is completely covered by a circle centered on the axis X and of diameter L2, and completely covers a circle centered on the X axis and of diameter L1, the tangents T1 and T2 or T1 'and T2' to these circles, which are also tangents to the cam, making between them complementary angles A1 and A2, the first of which, A1, is greater than the second, A2.
- the angle A1 is at most equal to 110 degrees, the angle A2 therefore being at least equal to 70 degrees.
- Cam 5 can, as shown in FIG. 3, have a shape obtained by anamorphosis of an ellipse.
- a cam as illustrated in FIG. 2, and which has, parallel to its dimension radial of minimum length L1, an intermediate width L3 greater than the dimension radial of minimum length L1 and less than the radial dimension of maximum length L2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Reciprocating Pumps (AREA)
Description
- la Figure 1 est une vue schématique d'une pompe à vide selon l'invention;
- la Figure 2 est une vue schématique d'une première came utilisable dans une pompe à vide selon l'invention; et
- la Figure 3 est une vue schématique d'une seconde came utilisable dans une pompe à vide selon l'invention.
Claims (5)
- Pompe à vide comprenant des premier et second cylindres (1, 2) de même diamètre (D) dans lesquels des premier et second pistons respectifs (3, 4), dont chacun est mû par un excentrique (51, 52), délimitent des premier et second volumes respectifs (V1, V2), chaque cylindre étant muni d'une entrée (11, 21) dotée d'un clapet anti-retour d'aspiration (13, 23) et d'une sortie (12, 22) dotée d'un clapet anti-retour de refoulement (14, 24), les cylindres (1, 2) étant alignés l'un avec l'autre et disposés symétriquement par rapport à un axe principal (X), caractérisée en ce que les pistons (3, 4) sont simultanément animés de mouvements d'aspiration respectifs (MA1, MA2), symétriques par rapport à l'axe principal (X), et pour lesquels les premier et second volumes (V1, V2) croissent, et de mouvements de refoulement respectifs (MR1, MR2), symétriques par rapport à l'axe principal (X), et pour lesquels les premier et second volumes (V1, V2) décroissent, et en ce que les mouvements d'aspiration et de refoulement (MA1, MA2, MR1, MR2) ont des première et seconde durées respectives (t1, t2) dont la première (t1) est supérieure à la seconde (t2).
- Pompe à vide suivant la revendication 1, caractérisée en ce que chaque excentrique (51, 52) est réalisé sous forme d'un guidage sur une même came (5) animée d'un mouvement de rotation uniforme autour de l'axe principal (X) et acceptant cet axe principal comme axe de symétrie d'ordre pair, en ce que les mouvements d'aspiration (MA1, MA2) des pistons (3, 4) résultent d'une rotation de première amplitude angulaire (A1) de la came (5), en ce que les mouvements de refoulement (MR1, MR2) des pistons (3, 4) résultent d'une rotation de seconde amplitude angulaire (A2) de la came (5), et en ce que la première amplitude angulaire (A1) est supérieure à la seconde amplitude angulaire (A2).
- Pompe à vide suivant la revendication 2, caractérisée en ce que la came (5) est conformée en une courbe fermée de symétrie axiale d'ordre 2, présentant une dimension radiale de longueur minimale (L1) et une dimension radiale de longueur maximale (L2) faisant entre elles des angles (A1, A2) différents de 90 degrés.
- Pompe à vide suivant la revendication 3, caractérisée en ce que les angles (A1, A2) formés entre les dimensions radiales de longueurs minimale et maximale (L1, L2) de la came (5) ont une valeur minimale au moins égale à 70 degrés et une valeur maximale au plus égale à 110 degrés.
- Pompe à vide suivant la revendication 2 ou 3, caractérisée en ce que la came (5) présente, parallèlement à sa dimension radiale de longueur minimale (L1) une largeur intermédiaire (L3) supérieure à la dimension radiale de longueur minimale (L1) et inférieure à la dimension radiale de longueur maximale (L2).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9801664A FR2774727B1 (fr) | 1998-02-12 | 1998-02-12 | Pompe a vide a faible bruit et rendement eleve |
| FR9801664 | 1998-02-12 | ||
| PCT/FR1999/000284 WO1999041501A1 (fr) | 1998-02-12 | 1999-02-08 | Pompe a vide a faible bruit et rendement eleve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1055070A1 EP1055070A1 (fr) | 2000-11-29 |
| EP1055070B1 true EP1055070B1 (fr) | 2002-12-04 |
Family
ID=9522880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99902628A Expired - Lifetime EP1055070B1 (fr) | 1998-02-12 | 1999-02-08 | Pompe a vide a faible bruit et rendement eleve |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1055070B1 (fr) |
| JP (1) | JP4172005B2 (fr) |
| DE (1) | DE69904299T2 (fr) |
| ES (1) | ES2189384T3 (fr) |
| FR (1) | FR2774727B1 (fr) |
| WO (1) | WO1999041501A1 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345582A (zh) * | 2011-10-10 | 2012-02-08 | 中国人民解放军第四军医大学 | 水平对置双气缸真空泵 |
| CN102094776B (zh) * | 2009-12-09 | 2015-03-11 | 上海汽车制动系统有限公司 | 汽车用对置摇摆活塞式真空泵 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008061311A1 (de) * | 2008-12-11 | 2010-06-24 | Doukas Ag | Vorrichtung zum Fördern eines Gases |
| CN109595137B (zh) * | 2018-12-20 | 2020-03-27 | 杨爱钗 | 一种负压蒸汽发生装置 |
| KR102420248B1 (ko) * | 2020-08-05 | 2022-07-13 | 이준재 | 진공펌프 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2579927A (en) * | 1947-05-17 | 1951-12-25 | Joho Olga | Opposed cylinder air compressor |
| US3834840A (en) * | 1972-06-07 | 1974-09-10 | E Hartley | Compact reciprocating piston machine |
| US4105371A (en) * | 1976-10-15 | 1978-08-08 | General Motors Corporation | Cam driven compressor |
| US4679994A (en) * | 1981-03-09 | 1987-07-14 | Allied Corporation | Piston vacuum pump |
| JPS5867978A (ja) * | 1981-10-16 | 1983-04-22 | Nippon Denso Co Ltd | 往復動圧縮機 |
| US5482443A (en) * | 1992-12-21 | 1996-01-09 | Commonwealth Scientific And Industrial Research Organization | Multistage vacuum pump |
-
1998
- 1998-02-12 FR FR9801664A patent/FR2774727B1/fr not_active Expired - Fee Related
-
1999
- 1999-02-08 ES ES99902628T patent/ES2189384T3/es not_active Expired - Lifetime
- 1999-02-08 WO PCT/FR1999/000284 patent/WO1999041501A1/fr not_active Ceased
- 1999-02-08 DE DE69904299T patent/DE69904299T2/de not_active Expired - Fee Related
- 1999-02-08 EP EP99902628A patent/EP1055070B1/fr not_active Expired - Lifetime
- 1999-02-08 JP JP2000531666A patent/JP4172005B2/ja not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094776B (zh) * | 2009-12-09 | 2015-03-11 | 上海汽车制动系统有限公司 | 汽车用对置摇摆活塞式真空泵 |
| CN102345582A (zh) * | 2011-10-10 | 2012-02-08 | 中国人民解放军第四军医大学 | 水平对置双气缸真空泵 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999041501A1 (fr) | 1999-08-19 |
| EP1055070A1 (fr) | 2000-11-29 |
| FR2774727A1 (fr) | 1999-08-13 |
| FR2774727B1 (fr) | 2000-04-21 |
| JP2002503786A (ja) | 2002-02-05 |
| DE69904299D1 (de) | 2003-01-16 |
| ES2189384T3 (es) | 2003-07-01 |
| JP4172005B2 (ja) | 2008-10-29 |
| DE69904299T2 (de) | 2003-08-21 |
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