EP2733353B1 - Pompe à fluide - Google Patents
Pompe à fluide Download PDFInfo
- Publication number
- EP2733353B1 EP2733353B1 EP12793012.1A EP12793012A EP2733353B1 EP 2733353 B1 EP2733353 B1 EP 2733353B1 EP 12793012 A EP12793012 A EP 12793012A EP 2733353 B1 EP2733353 B1 EP 2733353B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- space
- fluid
- piston
- path
- air
- 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.)
- Active
Links
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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/123—Fluid connections
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/128—Crankcases
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/16—Filtration; Moisture separation
-
- 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
- F04B53/20—Filtering
Definitions
- an air passage is formed in a support member provided at a lower portion of the cylinder. And, to this air passage, a sealed chamber is connected (the arrangement shown in Fig. 5 in the document).
- an air filter is connected (the arrangement shown in Fig. 6 , Fig. 9, etc. in the document).
- the valve unit includes:
- the air sucked from the outside space into the drive chamber is always filtered through the fluid filter, whereby dust and/or moisture will be removed therefrom. And, a portion of the air fed to the discharge path from the pressure increasing/decreasing chamber at the time of this sucking operation is sucked into the drive chamber via the merging space. Therefore, the load on the piston is reduced and at the same time the amount of air to be sucked from the outside space can be reduced.
- the fluid pump includes a path block forming the merging space and an opening defined in a bottom wall of the path block for establishing communication between the interior space of the path block and the outside space; and an upper face of the bottom wall is formed with an inclined posture such that the upper face is positioned lower as it extends toward a position closer to the opening.
- the fluid filter can be easily disposed under a condition of its movement being restricted by the vertical walls, e.g. by inserting the fluid filter to the space surrounded by the vertical walls.
- a tubular body may be provided to project downwards at a position on the side of the lower face of the bottom wall of the path block and surrounding the opening.
- a reciprocating type vacuum pump as an example of a fluid pump, comprises a piston 2 mounted inside a cylinder 1 to be movable back and forth therein, a pressure increasing/decreasing chamber A formed on the side of a cylinder head relative to the piston 2, and a drive chamber B formed opposite the pressure increasing/decreasing chamber A relative to the piston 2 and accommodating a crank mechanism C for transmitting a drive force to the piston 2.
- This vacuum pump is used as a negative pressure source for a brake booster (not shown) for an automobile.
- a negative pressure is developed in the pressure increasing/decreasing chamber A.
- a discharging direction to the left-hand side in Fig. 1
- air as a fluid is discharged from the pressure increasing/decreasing chamber A to the outside.
- this vacuum pump is not limited for an automobile. This pump can be used in various devices that require a negative pressure and can be used with a gas other than air as the fluid.
- valve unit V As a valve unit V is disposed at one end (on the side of the cylinder head) of the cylinder 1, this valve unit V and the piston 2 delimit the pressure increasing/decreasing chamber A therebetween. Further, as a pump housing 3 is disposed at the other end of the cylinder 1, the interior space of this pump housing 3 forms the drive chamber B.
- the pump housing 3 mounts an electric motor 4, and to a crank arm 5 rotatable together with an output shaft 4A of this electric motor 4, a base end of a connecting rod 6 is connected. And, the piston 2 is operably connected to the leading end of this connecting rod 6.
- the crank mechanism C includes the crank arm 5 and the connecting rod 6.
- the drive chamber B is configured such that a space opened laterally in the pump housing 3 is closed by a plate-like closure member 7.
- This closure member 7 defines a ventilation opening 7A.
- a path block 15 having an interior space communicated with this ventilation opening 7A is mounted on the lower face of the closure member 7 on the outer side thereof. And, this path block 15 and the closure member 7 are fixedly connected to the pump housing 3 with a fastener bolt 8. Further, a tubular portion 16 communicated with the interior space of the path block 15 is provided in the form of a projection toward the valve unit V.
- the valve unit V includes an intake valve 22 mounted at a position thereof communicated with a sucking space 21A (an example of "a control space") of a valve body 21 and a discharge valve 23 at a portion communicated with a discharging space 21 B (an example of "a feeding/discharging space”) of this valve body 21.
- the valve unit V further includes a cover plate 24 for isolating the sucking space 21 A and the discharging space 21 B from the outside. To this cover plate 24, there is connected a tube 25 for applying a negative pressure to an external brake booster (an example of "a pressurizing/depressurizing object").
- the intake valve 22 is formed of a material such as a resin which is flexibly deformable.
- the valve body 21 includes a tubular projecting portion 26 communicated with the discharging space 21 B, with the projecting portion 26 projecting toward the pump housing 3.
- a tubular connecting pipe 9 is provided for interconnecting this projecting portion 26 and the tubular portion 16 under a mutually communicated state, and this connecting pipe 9 has one end thereof fitted on the projecting portion 26 and the other end thereof fitted on the tubular portion 16.
- a ventilation path F is formed to extend from the ventilation opening 7A through the interior space of the path block 15 to be communicated with an opening 15H defined in the outer face of the path block 15.
- a fluid path E functioning as a discharge path, is formed to extend from the discharging space 21 B of the valve body 21 trough the connecting pipe 9 to be communicated with the interior space of the path block 15. This fluid path E is merged in a merging space G formed at an intermediate position of the ventilation path F, and an air filter 17 (an example of "a fluid filter”) is mounted in this merging space G.
- This vacuum pump as shown in Fig. 1 , is designed to be used under a posture that the electric motor 4 is disposed at an upper portion and the path block 15 is disposed at the lower side.
- the path block 15, as shown in Figs. 2-4 is configured such that at an upper position of a block body having a circular bottom wall 15A and a tubular wall 15B continuous from the outer perimeter of the wall 15A, a laterally projecting flange body 15C is formed integral therewith.
- the flange body 15C defines bolt holes 15D in which fastener bolts 8 are to be inserted, and at a position surrounding the block body, there is formed a seal groove 15E for accommodating a seal 19.
- the dimension of the vertical wall 15F in the vertical direction is set shorter than the distance from the upper face of the flange body 15C of the path block 15 to the bottom wall 15A.
- a tubular body 15L formed integral with the bottom wall 15A, the tubular body 15L having a cylindrical form and projecting downwards.
- Rib bodies 15M interconnecting this tubular body 15L and the lower face of the bottom wall 15A are formed to extend radially about the opening 15H.
- this tubular portion 16 On the lateral wall of this path block 15, the tubular portion 16 mentioned above is formed. And, this tubular portion 16 is communicated with the interior space of the block body consisting of the bottom wall 15A and the cylindrical wall 15B. Further, an arrangement is provided such that when this path block 15 is connected to the closure member 7, the ventilation opening 7A defined in the closure member 7 is communicated with the interior space of the block body.
- the path block 15 has the interior space that constitutes the fluid path E, the ventilation path F and the merging space G, and also realizes dust removal and moisture removal by the air filter 17 as well as noise reduction by the silencer 18. Further, as the bottom wall 15A of the path block 15 is formed with an inclination, water drops formed inside or moisture removed by the air filter 17 are caused to flow toward the opening 15H along the inclination of the upper face of the bottom wall 15A to be drained through this opening 15H to the outside.
- the annular groove 2 includes a first lateral wall 2Ga on the side of the pressure increasing/decreasing chamber, a second lateral wall 2Gb on the side of the drive chamber, and a bottom wall 2Gc located therebetween and forming the bottom of the annular groove 2G.
- the piston ring 30 has a triple construction formed of an inner ring 30A, an intermediate ring 30B and an outer ring 30C superposed with each other.
- This piston ring 30 is subject to an urging force for increasing the radius of the inner ring 30A. And, with this urging force, the outer perimeter of the outer ring 30C is placed into contact with the inner perimeter face of the cylinder 1 and a gap is formed between the inner perimeter face of the inner ring 30A and the bottom wall 20Gc of the annular groove 2G.
- this piston ring 30 is displaced toward the second lateral wall 2Gb to eventually come into contact with this second lateral wall 2Gb, thus forming a gap between this piston ring 30 and the first lateral wall 2G; hence, the flow of air from the pressure increasing/decreasing chamber A toward the communication holes 2T is allowed.
- the ventilation path F for feeding air to the communication opening 7A is merged with the fluid path E (discharge path) in the merging space G, it is possible to feed the air from the fluid path E (discharge path) to the ventilation path F.
- the air of the fluid path E (discharge path) and the air drawn via the opening 15H will be mixed.
- the amount of ambient air to be drawn can be reduced.
- air filtered through the air filter 17 will be sucked.
- dust and/or moisture (water content) will be removed by the air filter 17 and will not enter the drive chamber B.
- the path block 15 has the interior space that constitutes the fluid path E, the ventilation path F and the merging space G, and also realizes dust removal and moisture removal by the air filter 17 as well as noise reduction by the silencer 18. Further, as the bottom wall 15A of the path block 15 is formed with an inclination, water drops formed inside or moisture removed by the air filter are caused to flow toward the opening 15H along the inclination of the upper face of the bottom wall 15A to be drained through this opening 15H to the outside.
- the present invention may be used for fluid pumps in general that are configured such that a piston is operated inside a cylinder.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Claims (5)
- Pompe à fluide comprenant :un cylindre ;un piston monté à l'intérieur du cylindre pour être déplacé selon un mouvement de va-et-vient, le piston séparant l'intérieur du cylindre entre une chambre d'augmentation/réduction de pression du côté de la culasse et une chambre d'entraînement (B) opposée à la chambre d'augmentation/réduction de pression ;une unité de valve (V) ayant un espace de commande pour amener le fluide de la chambre d'augmentation/réduction de pression à agir sur un objet de pressurisation/de dépressurisation et un espace d'alimentation/décharge pour alimenter/décharger le fluide entre la chambre d'augmentation/réduction de pression et l'espace extérieur, l'unité de valve étant prévue dans la culasse afin de contrôler l'écoulement du fluide jusqu'à la chambre d'augmentation/réduction de pression au moment du mouvement de va-et-vient du piston ;un bloc de trajectoire (15) monté sur le cylindre,une trajectoire de ventilation (F) faisant communiquer la chambre d'entraînement et l'espace extérieur entre eux via le bloc de trajectoire ;une trajectoire de fluide (E) raccordée à l'espace d'alimentation/décharge et le bloc de trajectoire afin de s'unir avec la trajectoire de ventilation dans un espace de réunion (G) à l'intérieur du bloc de trajectoire ;un filtre de fluide monté dans l'espace de réunion et caractérisé par :une ouverture (15H) définie dans une paroi inférieure (15A) du bloc de trajectoire et l'espace extérieur ; etdans laquelle une face supérieure de la paroi inférieure est formée avec une posture inclinée de sorte que la face supérieure est positionnée plus bas lorsqu'elle s'étend vers une position plus proche de l'ouverture.
- Pompe à fluide selon la revendication 1, dans laquelle l'unité de valve comprend :une valve d'admission disposée dans l'espace de contrôle et configurée pour être ouverte uniquement lorsque le piston est actionné dans la direction d'aspiration pour aspirer l'air en tant que fluide à partir d'un objet de dépressurisation en tant qu'objet de pressurisation/dépressurisation jusqu'à la chambre d'augmentation/réduction de pression ;une valve de décharge disposée dans l'espace d'alimentation/décharge et configurée pour être ouverte uniquement lorsque le piston est actionné dans la direction de décharge pour amener l'air en tant que fluide à l'espace d'augmentation/réduction de pression ; etune trajectoire de décharge en tant que trajectoire de fluide pour amener l'air de la valve de décharge jusqu'à l'espace de réunion.
- Pompe à fluide selon la revendication 1, dans laquelle l'unité de valve comprend :une valve de décharge disposée dans l'espace de contrôle et configurée pour être ouverte uniquement lorsque le piston est actionné dans la direction de décharge pour amener l'air en tant que fluide de l'espace d'augmentation/réduction de pression jusqu'à un objet de pressurisation en tant qu'objet de pressurisation/dépressurisation ;une valve d'admission disposée dans l'espace d'alimentation/décharge et configurée pour être ouverte uniquement lorsque le piston est actionné dans la direction d'aspiration pour aspirer l'air en tant que fluide vers la chambre d'augmentation/réduction de pression ; etune trajectoire d'admission en tant que trajectoire de fluide pour amener le fluide aspiré via le filtre de fluide à la valve d'admission.
- Pompe à fluide selon l'une quelconque des revendications 1 à 3, dans laquelle, dans une zone annulaire entourant l'ouverture au titre de son centre, on forme une pluralité de parois verticales s'étendant vers le haut à partir de la face supérieure de la paroi inférieure,
l'espace de réunion est formé par la région entourée par les parois verticales, et
la trajectoire de fluide et la trajectoire de ventilation communiquent entre elles à l'extérieur de l'espace de réunion. - Pompe à fluide selon l'une quelconque des revendications 1 à 4, dans laquelle :un corps tubulaire est prévu pour faire saillie vers le bas dans une position sur le côté de la face inférieure de la paroi inférieure du bloc de trajectoire et entourant l'ouverture.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011125555 | 2011-06-03 | ||
JP2011242693A JP5748106B2 (ja) | 2011-06-03 | 2011-11-04 | 流体ポンプ |
PCT/JP2012/064173 WO2012165582A1 (fr) | 2011-06-03 | 2012-05-31 | Pompe à fluide |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2733353A1 EP2733353A1 (fr) | 2014-05-21 |
EP2733353A4 EP2733353A4 (fr) | 2015-07-01 |
EP2733353B1 true EP2733353B1 (fr) | 2016-05-18 |
Family
ID=47259434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12793012.1A Active EP2733353B1 (fr) | 2011-06-03 | 2012-05-31 | Pompe à fluide |
Country Status (5)
Country | Link |
---|---|
US (1) | US20140112812A1 (fr) |
EP (1) | EP2733353B1 (fr) |
JP (1) | JP5748106B2 (fr) |
CN (1) | CN203742952U (fr) |
WO (1) | WO2012165582A1 (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3223766A2 (fr) * | 2014-11-24 | 2017-10-04 | Huntleigh Technology Limited | Couvre-lit de régulation d'humidité |
JP6714971B2 (ja) * | 2015-02-10 | 2020-07-01 | ナブテスコオートモーティブ株式会社 | 真空ポンプ |
EP3051136B1 (fr) * | 2015-01-29 | 2020-04-01 | Pfeiffer Vacuum Gmbh | Pompe à vide |
TWI570329B (zh) * | 2015-02-13 | 2017-02-11 | Wen-San Chou | 空氣壓縮機之壓縮筒出氣構造改良 |
TWI580867B (zh) * | 2015-03-03 | 2017-05-01 | 周文三 | 空氣壓縮機之構造改良 |
TWI608168B (zh) * | 2016-01-18 | 2017-12-11 | 周文三 | 空氣壓縮機之汽缸出氣結構改良 |
TWI644021B (zh) * | 2016-02-26 | 2018-12-11 | 周文三 | 空氣壓縮機之汽缸出氣結構改良 |
WO2017155243A2 (fr) * | 2016-03-07 | 2017-09-14 | 뉴모텍(주) | Petit compresseur d'air |
US10760557B1 (en) * | 2016-05-06 | 2020-09-01 | Pumptec, Inc. | High efficiency, high pressure pump suitable for remote installations and solar power sources |
CN112955657B (zh) * | 2018-10-31 | 2023-06-27 | 山东君睿机械科技有限公司 | 一种具备高低压功能的家用电器 |
CN114837792A (zh) | 2021-03-10 | 2022-08-02 | 美普盛(上海)汽车零部件有限公司 | 一种带膨胀补偿密封件的电动冷却液泵 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1415183A (fr) * | 1964-11-21 | 1965-10-22 | Bosch Gmbh Robert | Machine telle que compresseur, notamment pour la production d'air comprimé ou autres applications |
JPS564693U (fr) * | 1979-06-20 | 1981-01-16 | ||
US4679994A (en) * | 1981-03-09 | 1987-07-14 | Allied Corporation | Piston vacuum pump |
JPH0631615B2 (ja) * | 1986-12-16 | 1994-04-27 | 三菱電機株式会社 | ガス圧縮機 |
JPH0547375U (ja) * | 1991-11-13 | 1993-06-22 | 株式会社共立 | エンジンコンプレッサ |
JP3017123B2 (ja) | 1997-03-24 | 2000-03-06 | 帝国ピストンリング株式会社 | 圧縮機 |
US7654283B2 (en) * | 2003-10-21 | 2010-02-02 | Seiko Epson Corporation | Check valve and pump including check valve |
BE1016727A4 (nl) * | 2005-08-17 | 2007-05-08 | Atlas Copco Airpower Nv | Verbeterde inrichting voor het regelen van het debiet van een mobiele oliegeinjecteerde schroefcompressor. |
US8322271B2 (en) * | 2007-07-02 | 2012-12-04 | Brewl Technologies, Inc. | Infusible material capsule for brewing a beverage |
DE102007042318B4 (de) * | 2007-09-06 | 2017-11-30 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Kompakter trockenlaufender Kolbenverdichter |
JP5477614B2 (ja) * | 2008-05-23 | 2014-04-23 | アイシン精機株式会社 | 弁構造 |
JP2011007118A (ja) | 2009-06-26 | 2011-01-13 | Aisin Seiki Co Ltd | 真空ポンプ |
-
2011
- 2011-11-04 JP JP2011242693A patent/JP5748106B2/ja active Active
-
2012
- 2012-05-31 US US14/123,579 patent/US20140112812A1/en not_active Abandoned
- 2012-05-31 CN CN201290000573.9U patent/CN203742952U/zh not_active Expired - Fee Related
- 2012-05-31 EP EP12793012.1A patent/EP2733353B1/fr active Active
- 2012-05-31 WO PCT/JP2012/064173 patent/WO2012165582A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
CN203742952U (zh) | 2014-07-30 |
EP2733353A4 (fr) | 2015-07-01 |
JP2013011268A (ja) | 2013-01-17 |
US20140112812A1 (en) | 2014-04-24 |
EP2733353A1 (fr) | 2014-05-21 |
WO2012165582A1 (fr) | 2012-12-06 |
JP5748106B2 (ja) | 2015-07-15 |
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