EP3161314A1 - Pompe volumétrique à piston et à moyen de distribution rotatif - Google Patents
Pompe volumétrique à piston et à moyen de distribution rotatifInfo
- Publication number
- EP3161314A1 EP3161314A1 EP15734337.7A EP15734337A EP3161314A1 EP 3161314 A1 EP3161314 A1 EP 3161314A1 EP 15734337 A EP15734337 A EP 15734337A EP 3161314 A1 EP3161314 A1 EP 3161314A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- exhaust
- intake
- product
- inlet
- 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.)
- Granted
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
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/0003—Piston machines or pumps characterised by having positively-driven valving the distribution member forming both the inlet and discharge distributor for one single pumping chamber
-
- 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
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
-
- 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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
-
- 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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- 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
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/04—Pumps for special use
-
- 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
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/20—Other positive-displacement pumps
- F04B19/22—Other positive-displacement pumps of reciprocating-piston type
-
- 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
- F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
-
- 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
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/0003—Piston machines or pumps characterised by having positively-driven valving the distribution member forming both the inlet and discharge distributor for one single pumping chamber
- F04B7/0007—Piston machines or pumps characterised by having positively-driven valving the distribution member forming both the inlet and discharge distributor for one single pumping chamber and having a rotating movement
Definitions
- the present invention relates to the field of volumetric piston pumps.
- An interesting application of such a pump relates to the supply of rubber gum of an extruder for forming a profile for the manufacture of a vehicle tire.
- Such a pump can of course be used for all kinds of viscous and liquid products.
- a volumetric pump comprises a product metering piston slidably mounted in a cylinder of the pump body forming a metering chamber, and means for actuating the piston, for example a cam in contact with one end thereof. .
- a type of volumetric pump also comprises a distribution valve rotatably mounted inside a sleeve of the pump body for communicating the metering chamber alternately with an intake chamber and an exhaust chamber of the sleeve, through an orifice provided in the thickness of said sheath.
- first and second groups of grooves are formed on the outer surface of the plug and arranged so as to pass in front of the opening of the sleeve during the rotation of the plug in order to successively communicate the metering chamber with the intake chamber and then with the exhaust chamber.
- the pumped product flows from the inlet chamber to the metering chamber, then from this metering chamber to the exhaust chamber through the same orifice.
- EP-A1-0 604 888 it will be possible for example to refer to the patent application EP-A1-0 604 888.
- leaks may also exist along the outer surface of the plug circumferentially between the intake grooves and the exhaust grooves in case of wear of this outer surface, for example by scratches, abrasion, etc. which can be caused by polluting particles contained in the product to be pumped.
- the flow rate of the pump may be uneven.
- the present invention aims to remedy this disadvantage.
- the present invention aims to provide a piston volumetric pump having a regular flow and simple design.
- the positive displacement pump comprises a product dosing chamber, a metering piston slidably mounted within said chamber, a sleeve defining at least in part an inlet chamber and a exhaust of the product, and a means for dispensing the product rotatably mounted inside the sleeve about an axis and able to put the metering chamber into communication alternately with the inlet chamber and the exhaust chamber.
- the dispensing means comprises an inlet member comprising means for passing the product able to come at least partly opposite an inlet orifice of the metering chamber to put said chamber in communication with the admission chamber.
- an escapement member comprising means for passing the product able to come at least partly opposite an orifice of output of the metering chamber for putting said chamber in communication with the exhaust chamber.
- the intake and exhaust members are located axially on either side of an internal partition wall of the sleeve and each mounted axially in abutment against said partition.
- the dispensing means also comprises means for holding the intake and exhaust members in abutment against the inner wall of the sheath.
- the dispensing means is adapted to separate the intake and exhaust functions of the product which are each produced by a specific member.
- the means of passage of the product of each member provide a single function of admission or exhaust.
- the axially abutment mounting of each inlet or exhaust member against the wall of the pump body and the maintenance of this axial contact make it possible to prevent product leakage between the intake chamber and the exhaust chamber. .
- the passage means for admission are spaced axially from those provided for the exhaust, which prevents a circumferential flow of product between these means.
- two orifices each specific to the product inlet or to the exhaust are also provided.
- each of the intake and exhaust members comprises a planar front face mounted axially bearing against the inner wall of the sheath.
- a plane contact between each inlet or exhaust member and the partition promotes a good seal between the intake and exhaust chambers.
- each of the intake and exhaust members comprises a body provided with means for passing the product, and a friction ring in rotation with said body and mounted axially in abutment against the inner wall of the sheath. This arrangement reduces the frictional forces between the intake and exhaust members and the sheath.
- the holding means comprise at least one elastic prestressing means capable of exerting an axial prestressing force on one of the intake and exhaust members.
- the dispensing means may also comprise a common support shaft on which the intake and exhaust members are mounted.
- the holding means are also mounted on said shaft.
- the intake and exhaust members and the inner wall of the sheath are annular.
- the internal clo ison can be located axially between the inlet and outlet ports of the metering chamber.
- the inlet and outlet ports are formed in the thickness of the sheath.
- the passage means may comprise grooves provided on the outer surfaces of the intake and exhaust members.
- - Figure 1 is a partial schematic sectional view of a volumetric pump according to an exemplary embodiment of the invention in a product inlet position
- - Figure 2 is a partial schematic sectional view of the pump of Figure 1 in an exhaust position of said product.
- FIGS. 1 and 2 show an exemplary embodiment of a volumetric pump, referenced as a whole, intended for dispensing a viscous product, such as an elastomer that may be unvulcanized rubber.
- the pump 10 comprises a pump body 12 provided with a sleeve 14 delimiting an admission chamber 16 and a discharge or exhaust chamber 18, and a cylinder 20 defining a metering chamber 22.
- the sleeve 14 presents an axis XX 'of elongation and the cylinder 20 has an axis YY' of elongation orthogonal to the axis X-X '.
- the cylinder 20 is fixed on the sheath 14.
- the metering chamber 22 is shifted radially outwardly with respect to the intake and exhaust chambers 18.
- the terms "axial, radial and circumferential" are defined by considering the axis X-X '.
- the pump 10 also comprises a product dispensing means 24 which is rotatably mounted inside the sleeve 14 about the axis X-X '.
- the dispensing means 24 is designed on the one hand to alternately communicate the metering chamber 22 with the inlet chamber 16 and the exhaust chamber 18 via two separate bodies, and secondly to prevent product leakage between these chambers.
- the intake and exhaust chambers 16 and 18 are separated from one another by the distribution means 24.
- the pump 10 further comprises an endless type feeding screw 26 disposed in the inlet chamber 16 and making it possible to move the product from an insertion orifice (not shown). the chamber towards the dispensing means 24 and put under pressure the pumped product.
- the distribution means 24 is secured to the screw 26 and the axis XX 'of said means coincides with that of the screw.
- the pump may be devoid of booster means depending on the product to be dosed.
- the pump 1 0 further comprises a product dosing piston 28 which is slidably mounted along the axis YY 'inside the metering chamber 22.
- the sliding movement of the metering piston 28 is perpendicular to the axis XX 'of rotation of the dispensing means 24.
- the piston 28 is slidably mounted between maximum and minimum volume positions of the metering chamber 22 which respectively correspond to bottom and top dead spots of said piston.
- the piston 28 moves from the top dead center to the bottom dead center. This movement towards the bottom dead center is illustrated schematically by the arrow referenced 30.
- the piston 28 moves from the bottom dead center to the top dead center under the effect of means. actuator (not shown) of said pump. This movement towards the top dead center is represented by the arrow referenced 32.
- the actuating means may for example include a cam mounted in contact against the lower end of the metering piston 28. The rotational movements of the distribution means 24 and translation of the piston 28 are synchronized.
- the dispensing means 24 comprises a product inlet member 34, a member 36 for exhausting said product axially spaced from said intake member, and a common support shaft 38 of axis XX 'on which said members are mounted.
- the annular intake and exhaust members 34, 36 are rotationally secured to said shaft 38 via a key 40.
- the intake and exhaust members 34, 36 can slide axially on the shaft 38 along the key 40.
- the shaft 38 is integral with the screw 26 for feeding.
- the intake and exhaust members 34, 36 are arranged axially on either side of an internal partition 42 of the sleeve and axially bear against said partition.
- the partition 42 of annular shape, axially separates the inlet chamber 16 from the exhaust chamber 18.
- the partition 42 extends inwards from the bore of the sheath.
- the partition 42 extends radially to the vicinity of the support shaft 38 while remaining radially at a distance therefrom.
- the partition 42 has two opposite flat front faces against which each of the intake and exhaust members 34, 36 is axially supported.
- the inlet member 34 is disposed in the inlet chamber 16.
- the inlet member 34 comprises a body 44 and a friction ring 46 mounted axially bearing against said body.
- the body 44 and the friction ring 46 are integral in rotation with the shaft 38 via the key 40.
- the body 44 is mounted axially in abutment against a shoulder 38a of the shaft and the friction ring 46 comes axially in abutment against the wall 42 of the sheath.
- the shoulder 38a of the shaft is here located at an axial end of said shaft and extends radially outwards.
- the shoulder 38a forms a means for maintaining the axial position of the intake member 34 bearing against the partition 42 of the sleeve.
- the holding means is axially mounted in abutment against the inlet member 34.
- the body 44 comprises an axial cylindrical outer surface 44a centered in the bore of the sleeve 14 and two opposite end faces 44b, 44c radially defining said outer surface.
- the front face 44b is oriented axially on the side of the internal wall 42 of the sleeve and forms a bearing face for the friction ring 46.
- the front face 44c is oriented axially on the side of the product introduction orifice of the admission room 16.
- the end face 44c is mounted axially in abutment against the shoulder 38a of the shaft.
- the body 44 of the intake member further comprises a plurality of recesses or grooves 44d formed on the outer surface 44a and opening on the end face 44c.
- the grooves 44d are spaced from each other in the circumferential direction, preferably evenly.
- the grooves 44d run past an inlet orifice 48 of the metering chamber 22.
- the grooves 44d ensure the setting fluidic communication of the metering chamber 22 with the admission chamber 16.
- the escapement member 36 has a design similar to that of the admission member 34.
- the exhaust member 36 is disposed in the exhaust chamber 1 8.
- the exhaust member 36 comprises a body 50 and a friction ring 52 mounted axially bearing against said body 50.
- the friction ring 52 is axially mounted in abutment with the partition 42 of the sleeve axially on the opposite side to the inlet member 34. .
- the body 50 comprises an axial cylindrical outer surface 50a centered in the bore of the sleeve 14 and two opposite end faces 50b, 50c radially defining said outer surface.
- the front face 50b is oriented axially on the side of the inner wall 42 of the sleeve and forms a bearing surface for the friction ring 52.
- the front face 50c is oriented axially towards a discharge orifice (not shown). the product of the exhaust chamber 1 8.
- the body 50 of the exhaust member 36 also comprises a plurality of recesses or grooves 50d formed on the outer surface 50a, opening on the end face 50c and spaced relative to each other in the circumferential direction.
- the grooves 50d run past a outlet orifice 54 of the metering chamber 22.
- the grooves 50d ensure the fluidic communication of the metering chamber 22 with the exhaust chamber 18.
- the grooves 50d of the exhaust member are arranged relatively to the grooves 44d of the inlet member so that when one of the grooves 44d comes opposite the inlet orifice 48 of the metering chamber 22, none of the grooves 50d of the exhaust member is positioned opposite the outlet orifice 54. In this product inlet position in the metering chamber 22, the outlet orifice 54 is closed off by the outer surface 50a of the exhaust member as shown in FIG.
- the dispensing means 24 makes it possible to put the metering chamber 22 in communication with alternately the inlet chamber 16 and the exhaust chamber 18.
- the inlet orifice 48 and the outlet orifice 54 are formed in the thickness of the sleeve 14 of the pump body and open into the metering chamber 22.
- the orifices 48, 54 radially extend in the thickness of the sheath 14.
- the orifices 48, 54 are located radially facing the metering piston 26 and arranged radially beyond the top dead center of said piston.
- the orifices 48, 54 are located axially on either side of the partition 42, respectively on the side of the inlet chamber 16 and the exhaust chamber 18.
- the rotary friction rings 46, 52 are mounted axially in abutment against the fixed partition 42 of the pump body.
- the partition 42 is in axial contact with the friction ring 46 of the intake member on one side and is in axial contact with the friction ring 52 of the exhaust member on the other side.
- Each friction ring 46, 52 comprises a front face 46a, 52a here radial plane mounted axially in contact against the partition 42 inside the sheath.
- each friction ring 42, 52 is made of a low coefficient of friction material and may have self-lubricating properties and good wear resistance, for example bronze, graphite, etc.
- the dispensing means 24 further comprises an annular washer 56 mounted on the shaft 38 and coming axially in abutment against the exhaust member 36, and a nut 58 which is screwed onto a threaded portion of said shaft (not referenced) and blocking axially the washer 56.
- the washer 56 is mounted axially in abutment against the end face 50c of the exhaust member 36.
- the washer 56 may for example be of the Belleville type.
- the washer 56 is able to exert an axial force on the exhaust member 36 so as to apply an axial prestress tending to keep said member against the wall 42 of the sheath.
- any other resilient biasing means with axial elasticity able to exert an axial prestressing force on the exhaust member 36. It could also be possible to combine several prestressing means stacked axially between the nut 58 and the exhaust member 36.
- the washer 56 and the nut 58 form means for holding the axial position of the exhaust member 36 in abutment against the partition 42 for separating the sleeve. These holding means are mounted axially in abutment against the exhaust member 36.
- a pump comprising a distribution means designed to dissociate the intake and exhaust functions of the product which are each produced by a specific element.
- the passage means of each member provide a single function of admission or exhaust.
- the axial contact between each inlet member or The exhaust system and the pump body partition make it possible to avoid product leaks between the intake chamber and the exhaust chamber efficiently and economically, even with the presence of a radial functional element. between the dispensing means and the bore of the barrel of the pump body. The obtaining of a regular flow is favored.
- the pressure of the product applied axially against the intake member and / or the pressure of the product applied axially against the exhaust member promotes the axial plating of said members against the partition wall of the sleeve.
- the pressure of the product on the intake side and / or the pressure of the product on the exhaust side make it possible to maintain this plating.
- the axial biasing force exerted by the washer also promotes the maintenance of axial contact between the wall of the sleeve and between the intake and exhaust members in case of wear.
- the passage means for the admission of the product are offset axially relative to the means of passage for the exhaust. This avoids a flow of product between the means for admission and those for the exhaust in case of wear on the outer surface of the dispensing means.
- each inlet or exhaust member comprises a body and a separate friction ring to limit friction with the wall of the pump body.
- each member could be constituted solely by the body and could preferably comprise an anti-friction and anti-wear coating.
- a friction ring or a coating could be provided on each side face of the fixed internal wall of the pump body.
- each of the intake and exhaust members could comprise, in replacement of the ring of friction, a seal, for example ring or lip (s), rubbing against the partition wall of the sleeve.
- a seal for example ring or lip (s)
- a partition wall comprising, on each of its end faces, a seal coming to rub against the associated intake or exhaust member.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Coating Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1456210A FR3022958B1 (fr) | 2014-06-30 | 2014-06-30 | Pompe volumetrique a piston et a moyen de distribution rotatif |
| PCT/EP2015/064777 WO2016001187A1 (fr) | 2014-06-30 | 2015-06-30 | Pompe volumétrique à piston et à moyen de distribution rotatif |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3161314A1 true EP3161314A1 (fr) | 2017-05-03 |
| EP3161314B1 EP3161314B1 (fr) | 2018-05-02 |
Family
ID=51298894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15734337.7A Active EP3161314B1 (fr) | 2014-06-30 | 2015-06-30 | Pompe volumétrique à piston et à moyen de distribution rotatif |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US10400756B2 (fr) |
| EP (1) | EP3161314B1 (fr) |
| CN (1) | CN106536926B (fr) |
| FR (1) | FR3022958B1 (fr) |
| WO (1) | WO2016001187A1 (fr) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US937790A (en) * | 1908-02-20 | 1909-10-26 | Nat Vacuum Cleaning Company | Pump. |
| FR545198A (fr) * | 1921-12-22 | 1922-10-06 | Anciens Etablissements Berger | Perfectionnements apportés aux pompes à piston |
| US1932636A (en) * | 1932-04-13 | 1933-10-31 | S R Dresser Mfg Co | Rotary valve for compressors |
| US3694112A (en) * | 1970-10-15 | 1972-09-26 | New Brunswick Scientific Co | Rotary valve pump |
| US4989576A (en) * | 1981-07-30 | 1991-02-05 | Coates George J | Internal combustion engine |
| FR2699966A1 (fr) * | 1992-12-31 | 1994-07-01 | Sedepro | Machine à piston comportant un organe de distribution rotatif. |
| JP2001073933A (ja) * | 1999-09-01 | 2001-03-21 | Bridgestone Corp | 容積型押出装置および粘性材料の押出方法 |
| JP5224476B2 (ja) * | 2006-06-02 | 2013-07-03 | ノーメット マネージメント サービス ビイ.ヴイ. | 駆動機構を具えた定量ポンプ |
| EP1925811B1 (fr) * | 2006-11-23 | 2009-09-16 | Willibrord Lösing Filterproduktion GmbH | Pompe pour fluide, en particulier pompe manuelle pour un moteur diesel |
| FR2911374B1 (fr) * | 2007-01-11 | 2010-08-20 | Michelin Soc Tech | Pompe volumetrique a piston et procede de controle de debit de cette pompe |
| DE102012102274B4 (de) * | 2012-03-19 | 2018-05-24 | B. Braun Melsungen Ag | Kolbenpumpe |
| TWI495783B (zh) * | 2013-01-11 | 2015-08-11 | Nat Univ Tsing Hua | 具有轉動式進氣排氣機構的氣動引擎 |
-
2014
- 2014-06-30 FR FR1456210A patent/FR3022958B1/fr not_active Expired - Fee Related
-
2015
- 2015-06-30 EP EP15734337.7A patent/EP3161314B1/fr active Active
- 2015-06-30 WO PCT/EP2015/064777 patent/WO2016001187A1/fr not_active Ceased
- 2015-06-30 CN CN201580035544.4A patent/CN106536926B/zh active Active
- 2015-06-30 US US15/323,025 patent/US10400756B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| FR3022958B1 (fr) | 2016-07-01 |
| EP3161314B1 (fr) | 2018-05-02 |
| WO2016001187A1 (fr) | 2016-01-07 |
| FR3022958A1 (fr) | 2016-01-01 |
| US20170138356A1 (en) | 2017-05-18 |
| CN106536926A (zh) | 2017-03-22 |
| US10400756B2 (en) | 2019-09-03 |
| CN106536926B (zh) | 2018-12-21 |
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