EP3735516A1 - Pumpenvorrichtung sowie verfahren zum zumindest lokalen abdichten der pumpenvorrichtung - Google Patents
Pumpenvorrichtung sowie verfahren zum zumindest lokalen abdichten der pumpenvorrichtungInfo
- Publication number
- EP3735516A1 EP3735516A1 EP19726594.5A EP19726594A EP3735516A1 EP 3735516 A1 EP3735516 A1 EP 3735516A1 EP 19726594 A EP19726594 A EP 19726594A EP 3735516 A1 EP3735516 A1 EP 3735516A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radial
- chamber pin
- pump ring
- separation chamber
- pump
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C5/00—Rotary-piston machines or engines with the working-chamber walls at least partly resiliently deformable
- F01C5/02—Rotary-piston machines or engines with the working-chamber walls at least partly resiliently deformable the resiliently-deformable wall being part of the inner member, e.g. of a rotary 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C5/00—Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable
Definitions
- the invention relates to a pump device and a method for at least locally sealing the pump device, in particular on an inner wall surface of the hydraulic housing, using a separating chamber pin.
- Generic pump devices are well known from the prior art.
- the publication WO 2016/173800 A1 which goes back to the applicant, discloses a corresponding pump device for pumping or conveying liquids with a hydraulic housing, a pump ring carrier and a pump ring which is operated by means of a separating chamber pins, also referred to as “clamping members”, to separate pump chambers from one another or a suction side from a pressure side of the pump.
- the pump ring is sometimes referred to in the trade as the "membrane”.
- the separating chamber pin is pressed axially into the elastic pump ring during assembly and, with its free front edge, shifts the pump ring both in the axial and in the radial direction, the radial offset creating a seal on the inner wall surface of the hydraulic housing.
- the problem here is that the axial insertion or displacement of the separating chamber pin also exerts axial loads on the pump ring, which can damage it or lead to an uneven tension ratio within the pump ring. The tightness is then not ensured, or at least not over the life of the pump device.
- the invention is therefore based on the object to provide a pump device in which the sealing of the pump ring on the Hydraulikge housing can take place, the acting on the pump ring on Monday the axial forces are eliminated or at least reduced.
- a pump device for pumping a liquid which comprises a hydraulic housing, a pump ring carrier arranged in the hydraulic housing and an elastic pump ring arranged in the radial direction between the pump ring carrier and the hydraulic housing and a separation chamber pin.
- the pump ring can be pressed in the radial direction against an inner wall surface of the hydraulic housing in order to produce an at least local seal on the hydraulic housing by the separating chamber pin in order to close the pump chambers of the pump device. separation from each other.
- the hydraulic housing has a radial offset section, along which a displacement element formed on the separation chamber pin or separately interacting with the separation chamber pin can be inserted in the axial direction and thus the
- Separation chamber pin and the pump ring offset in the radial direction to produce a radial compression of the elastic pump ring on the Hydraulikge housing.
- the provision of the radial offset section provided on the hydraulic housing and of the offset element acting on the separation chamber pin makes it possible for the separation chamber pin to initially be able to be passed completely or essentially completely through the pump ring without exerting any significant axial force on the pump ring.
- the pressing of the pump ring against the hydraulic housing in the radial direction can advantageously be brought about by the offset element which interacts with the radial offset section after the separating chamber pin extends over the pump ring in the axial direction.
- the axial force previously exerted on the pump ring when inserting the separation chamber pin, which led to an undesired local movement of the pump ring in the axial direction, can be avoided.
- the offset element is formed in one piece on the separating chamber pin, in particular on its axial edge section, and displaces the separating chamber pin in the radial direction as soon as it interacts with the radial offset section.
- the interaction can be achieved, for example, by pushing the offset element in the axial direction over the radial offset section and thereby displacing the separation chamber pin in the radial direction.
- the one-piece design means that additional components are not required.
- an embodiment of the pump device is characterized in that a radially outer insertion plane of a lateral surface of the separating chamber pin runs in the radial direction without overlap in a pre-assembled state of the separating chamber pin in a pre-assembled state of the separating chamber pin.
- the separation chamber pin can be guided past the pump ring in the axial direction without touching it, or at least without exerting an axial force on it.
- the insertion level and the pump ring level can also coincide.
- the pre-assembly state is the state in which the separation chamber pin is inserted into the elastic pump ring but does not yet exert any radial compression on the pump ring.
- an embodiment of the pump device is favorable in which the separating chamber pin can be displaced in the radial direction in a state that completely extends the pump ring in the axial direction, in order to simultaneously press the elastic pump ring over its entire effective axial length against the inner wall surface of the hydraulic housing.
- the separation chamber pin has a sufficient axial length so that it is first passed completely through the pump ring in the axial direction and only then is it moved as a whole in the radial direction. This means that no axial forces act on the pump ring during insertion of the separation chamber pin, which could damage it.
- the radial offset section of the hydraulic housing is designed as a radial step.
- the radial step is provided on an axial insertion section of the hydraulic housing for the separation chamber pin, so that the separation chamber pin can interact with the radial step in the axial outer region, ie axially spaced apart from the pump ring, in order to bring about the radial offset of the separation chamber pin and pump ring.
- the pump device is characterized in that the radial step and the Ver set element formed on the separating chamber pin have a corresponding run-up slope over which the separating chamber pin can be pushed in the axial direction in order to simultaneously generate the radial offset of the separating chamber pin and the pump ring.
- the separating chamber pin can thus be inserted axially into the pump ring as before, while the run-on bevels of the radial step and the offset element provide a guide for the separating chamber pin, which automatically moves it radially when fully inserted into the final assembly position.
- an exemplary embodiment of the pump device provides that the fly hydraulic housing on a side axially opposite the radial offset section to the pump ring carrier has a receptacle for the
- Separation chamber pin forms.
- the receptacle has an insertion ramp which runs obliquely in the radial direction, via which the separating chamber pin can be pushed and at the same time displaced in the radial direction.
- the separation chamber pin can be displaced in a radial direction on the inclined insertion ramp of the receptacle on a second axial side and thus over its entire axial length.
- a favorable embodiment is one in which the inclined insertion ramp and the starting bevels have the same angle with respect to an axial extent of the separating comb pin, so that the separating chamber pin can be displaced axially on both sides in the radial direction.
- the pump device further comprises at least one insertion element, the radial extent of which is dimensioned larger than that of the radial offset section.
- the at least one insert element can be inserted into the radial offset section in the axial direction and thereby displaces the separating chamber pin and the pump ring in the radial direction.
- the number of parts is admittedly thrust element larger, but conventional standardized separation chamber pins can be used, which are displaced in the radial direction via the insertion element. An offset element formed on the separation chamber pin can then be dispensed with.
- the hydraulic housing has two axially opposite radial offset sections and two insertion elements in relation to the pump ring carrier, whereby one insertion element can be inserted in each axial offset section and thereby the separating chamber pin and the pump ring of two axially opposing overlying pages offset only in the radial direction.
- the disclosure also includes the method for at least locally sealing the pump device described above, comprising a hydraulic housing and a drive shaft extending in the axial direction within the hydraulic housing, a pump ring carrier arranged in the radial direction between the hydraulic housing and the drive shaft, one in the radial direction between the Pump ring carrier and the hydraulic housing arranged elastic pump ring and one
- the separation chamber pin is first positioned in a state that completely extends the pump ring in the axial direction and is then displaced in the radial direction. As a result, the pump ring is pressed or pressed against the inner wall surface of the hydraulic housing to produce the at least local seal.
- the method also includes the variant that the radial offset section designed as a radial step and the offset element designed on the separation chamber pin have the corresponding run-on slope, over which the separation chamber pin is pushed in the axial direction, at the same time to the separation chamber pin and the pump ring in the radial direction offset.
- the method provides that the separating chamber pin in the axial direction over the oblique running insertion ramp is pushed and at the same time is displaced in the radial direction.
- the pump ring is pressed from its two axially opposite sides as a whole against the inner wall surface of the hydraulic housing.
- the insert element is inserted into the radial offset section in the axial direction and thereby displaces the separating chamber pin and the pump ring in the radial direction only.
- the method comprises the exemplary embodiment in which the hydraulic housing to the pump ring carrier has two axially opposed rings. has dial-offset sections and two insert elements, one insert element each being inserted in a radial offset section in the axial direction and thereby displacing the separating chamber pin and the pump ring from two axially opposite sides in the exclusively radial direction.
- FIG. 1 shows a side sectional view of a section of a conventional pump device not according to the invention
- FIG. 2a is a side sectional view of a section of a pump device in a first embodiment
- FIG. 2b shows the side sectional view of the detail from FIG. 2a with the separation chamber pin fitted
- 3a is a side sectional view of a section of a pump device in a second embodiment
- FIG. 3b shows the side sectional view of the detail from FIG. 3a with the separation chamber pin mounted
- FIG. 4 sectional view A-A of Fig. 2a and 3a
- FIG. 1 shows a sectional side view of a section of a conventional pump device 100 with a hydraulic housing 101, a pump ring carrier 103 arranged in the hydraulic housing 101 and an elastic pump ring 102 arranged between them.
- the pump device 100 is not necessarily state of the art, but only represents the problem solved by the invention.
- a separation chamber pin 104 is pushed in the axial direction into the pump ring 102 and simultaneously presses with its free axial end against the pump ring 102 axial and radial direction for pressing on the inner wall surface of the hydraulic housing 101, wherein damage to the pump ring 102 cannot be ruled out by the axial force.
- FIG. 2a and 2b show a first embodiment variant of a section of the pump device 1 in a lateral sectional view, the radial direction RR running vertically and the axial direction AR running horizontally.
- Other components of the pump device 1, such as the drive motor or the drive shaft, have been omitted for reasons of clarity.
- the pump device 1 comprises, as essential components, the hydraulic housing 2 formed from several parts, the pump ring carrier 5, the elastic pump ring 3 arranged in the radial direction between the pump ring carrier 5 and the hydraulic housing 2 and the separating chamber pin 4.
- FIG. 2a shows the
- a connection 20 for conveying liquid is shown on the outside of the hydraulic housing 2.
- the hydraulic housing 2 can also be replaced in part by flanges.
- the hydraulic housing 2 has an insertion channel 12 for the
- Isolation chamber pin 4 on the first axial side of the radial offset section 6 designed as a radial step and on its second axial side the receptacle 9 are provided for the separation chamber pin 4.
- the radial stage of the radial offset section 6 on the hydraulic housing 2 forms a run-up slope 7, via which the separating chamber pin 4 can be displaced in the radial direction.
- the radially outer insertion plane EE of the outer surface of the separating chamber pin 4 runs parallel and at a slight distance in the radial direction from the pump ring plane PE of the pump ring 3, so that the separating chamber pin 4 on the pump ring up to the state shown in FIG.
- the offset element is formed in one piece on the separation chamber pin 4 as a local thickening 14 in the axial end section.
- the transition between the thickening 14 and the remaining separation chamber pin 4 also takes place via a run-up slope 8 which is shaped in accordance with the run-up slope 7 of the radial step.
- the receptacle 9 has the insertion ramp 10 at an angle corresponding to the run-up slope 7 of the hydraulic housing 2.
- the separation chamber pin 4 forms a conical taper 11 at its free axial end, which in the embodiment shown is shaped in accordance with the insertion ramp 10. 2b, the separating chamber pin 4 is fully inserted into the receptacle 9, and the seal between the pump ring 3 and the inner wall surface 21 has been carried out.
- FIGS. 2a and 2b an alternative variant of the pump device 1 is shown in sections as side sectional views, the same Features of Figures 2a and 2b are not repeated, however, are hereby considered disclosed.
- the radial offset section 6 of the hydraulic housing 2 is of quite angled design and is identical on both axially opposite sides of the pump ring carrier 5.
- the separation chamber pin 4 is already positioned so that it completely extends over the pump ring 3 in the axial direction.
- the insertion level EE and the pump ring level PE coincide in the embodiment shown without a gap.
- an insertion element 22 is axially inserted on both sides, the radial extent of which is larger than that of the radial offset sections 6.
- the insertion elements 22 each have a bevel 23 on their edge sections facing the separating chamber pin 4 to be able to be introduced better and thereby move the separating chamber pin 4 and the elastic pump ring 3 in the exclusively radial direction RR and press against the inner wall surface 21 of the hydraulic housing 2.
- FIGS. 4 and 5 show the sectional views A-A of FIGS. 2a and 3a and B-B of FIGS. 2b and 3b, the radial offset of the separating chamber pin 4 and the resulting compression of the pump ring 3 against the inner wall surface 21 of the hydraulic housing 2 being evident.
- an alternative embodiment also includes combining the two exemplary embodiments according to FIGS. 2a and 2b with one another and on an axial side the solution according to FIGS. 3a, 3b with rectangular radial offset sections 6 and an insertion element 22 on the opposite axial side to provide a solution according to Figure 2a, 2b with insert 9, the separating chamber pin 4 is formed on its two axial sides according to the game shownassisbei.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018114455.5A DE102018114455A1 (de) | 2018-06-15 | 2018-06-15 | Pumpenvorrichtung sowie Verfahren zum zumindest lokalen Abdichten der Pumpenvorrichtung |
| PCT/EP2019/062583 WO2019238351A1 (de) | 2018-06-15 | 2019-05-16 | Pumpenvorrichtung sowie verfahren zum zumindest lokalen abdichten der pumpenvorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3735516A1 true EP3735516A1 (de) | 2020-11-11 |
Family
ID=66353805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19726594.5A Withdrawn EP3735516A1 (de) | 2018-06-15 | 2019-05-16 | Pumpenvorrichtung sowie verfahren zum zumindest lokalen abdichten der pumpenvorrichtung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20210324843A1 (de) |
| EP (1) | EP3735516A1 (de) |
| CN (2) | CN208845350U (de) |
| DE (1) | DE102018114455A1 (de) |
| WO (1) | WO2019238351A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018114455A1 (de) * | 2018-06-15 | 2019-12-19 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Pumpenvorrichtung sowie Verfahren zum zumindest lokalen Abdichten der Pumpenvorrichtung |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011015110B3 (de) * | 2011-03-19 | 2012-01-26 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Dosiersystem |
| EP3123028B1 (de) * | 2014-03-26 | 2018-08-29 | Continental Automotive GmbH | Verfahren zum betrieb einer pumpe |
| DE102014112390A1 (de) * | 2014-08-28 | 2016-03-03 | Continental Automotive Gmbh | Pumpe zur Förderung einer Flüssigkeit, insbesondere zur Förderung eines Abgasreinigungsadditivs |
| DE102015106612A1 (de) | 2015-04-29 | 2016-11-03 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Pumpenvorrichtung |
| DE102015106613A1 (de) * | 2015-04-29 | 2016-11-03 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Pumpenvorrichtung |
| DE102018114455A1 (de) * | 2018-06-15 | 2019-12-19 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Pumpenvorrichtung sowie Verfahren zum zumindest lokalen Abdichten der Pumpenvorrichtung |
-
2018
- 2018-06-15 DE DE102018114455.5A patent/DE102018114455A1/de not_active Withdrawn
- 2018-08-13 CN CN201821301095.0U patent/CN208845350U/zh not_active Expired - Fee Related
-
2019
- 2019-05-16 CN CN201980020013.6A patent/CN111868351B/zh not_active Expired - Fee Related
- 2019-05-16 EP EP19726594.5A patent/EP3735516A1/de not_active Withdrawn
- 2019-05-16 US US17/252,246 patent/US20210324843A1/en not_active Abandoned
- 2019-05-16 WO PCT/EP2019/062583 patent/WO2019238351A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN111868351A (zh) | 2020-10-30 |
| CN111868351B (zh) | 2022-05-27 |
| WO2019238351A1 (de) | 2019-12-19 |
| US20210324843A1 (en) | 2021-10-21 |
| CN208845350U (zh) | 2019-05-10 |
| DE102018114455A1 (de) | 2019-12-19 |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: GHODSI-KHAMENEH, HASSAN Inventor name: KUHLMEY, ANDREAS Inventor name: KUHNERT, GERHARD Inventor name: HAUER, DANIEL Inventor name: STAIGER, MARIO |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HAUER, DANIEL Inventor name: DIETZ, BENJAMIN Inventor name: KUHLMEY, ANDREAS Inventor name: KUHNERT, GERHARD Inventor name: STAIGER, MARIO Inventor name: GHODSI-KHAMENEH, HASSAN |
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| DAV | Request for validation of the european patent (deleted) | ||
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| 18D | Application deemed to be withdrawn |
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