EP1597480A1 - Kolbenpumpe, vorzugsweise kolbenvakuumpumpe, mit auslassventil - Google Patents
Kolbenpumpe, vorzugsweise kolbenvakuumpumpe, mit auslassventilInfo
- Publication number
- EP1597480A1 EP1597480A1 EP03767639A EP03767639A EP1597480A1 EP 1597480 A1 EP1597480 A1 EP 1597480A1 EP 03767639 A EP03767639 A EP 03767639A EP 03767639 A EP03767639 A EP 03767639A EP 1597480 A1 EP1597480 A1 EP 1597480A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- valve
- piston pump
- pump according
- valve plate
- 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- Withdrawn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
- 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
- F04B53/12—Valves; Arrangement of valves arranged in or on pistons
- F04B53/121—Valves; Arrangement of valves arranged in or on pistons the valve being an annular ring surrounding the piston, e.g. an O-ring
Definitions
- Piston pump preferably piston vacuum pump, with outlet valve
- the invention relates to a piston pump, preferably a piston vacuum pump with the features of the preamble of patent claim 1.
- the present invention is therefore based on the object of designing a piston pump, preferably a piston vacuum pump, in such a way that an increase in the stroke frequency is also associated with an improvement in its delivery properties, in particular its vacuum technology properties.
- the invention is based on the knowledge gained in piston vacuum pumps that the design of the exhaust valves was the cause of the unsatisfactory results of the aforementioned tests, i.e. that an increase in the vacuum properties cannot be achieved simply by increasing the stroke frequency.
- Vacuum pumps according to the invention have a higher pumping speed and achieve lower final pressures.
- piston pumps that are used in pressure ranges that are above atmospheric pressure. Further advantages and details of the invention are based on shown in the Figures 1 to 5 embodiments of the piston / cylinder assemblies which are suitable for use in piston pumps or 'piston vacuum pumps, will be explained. Show it
- FIGS. 1 and 2 a solution with a valve disk guided by spring arms
- Figure 3 shows a solution with elastomeric projections on the end face of the piston
- the respective piston / cylinder arrangement is denoted by 1, the cylinder by 2, the piston by .3, the exhaust valve assigned to the end face 4 of the piston 3 by 5 and the valve plate of the exhaust valve 5 by 6.
- the cylinder 2 is formed by a bore in the pump housing or block 8.
- the gas inlet takes place via an annular groove 9 in the cylinder wall, which is connected to the inlet of the pump in a manner not shown.
- the piston releases the annular groove 9, so that gases can flow into the displacement.
- the outlet valve 5 is opened.
- the valve disk 6 is part of the outlet valve 5. It is located in an outlet chamber 11, to which the outlet line 12 is connected.
- the diameter of the valve plate 6 is larger than the diameter of the piston 3.
- the front edge of the cylinder 2 has the function of the valve seat 13.
- the valve plate 6 is equipped with at least two holding arms 15. They are either clamped themselves or (as shown) via an outer ring 16 in the housing.
- the holding arms 15 do not extend directly radially but in sections approximately peripherally. This design allows the valve plate to move out of the level. ne of the clamped ring 16 out.
- the holding arms 15 generate the desired restoring forces with such a movement.
- the valve 5 is generally actuated by the piston 3. Only at the beginning of an operating phase can the amount of gas delivered be so large that already compressed delivery medium initiates the opening movement of the valve plate 6.
- the position of the piston at the top dead center is selected so that it has a small projection, that is to say that it projects into the outlet space 11 in this position. When it moves to the top dead center, it lifts the valve plate 6 from its seat 13 and thus opens the valve 5. During its subsequent downward movement, the holding arms 15 cause the valve 5 to close.
- several measures - alone or in combination - are proposed:
- the valve disk 6 has the smallest possible mass to be accelerated. It expediently consists of sheet steel and has a thickness of 0.2 to 0.5 mm, preferably 0.3 to 0.4 mm.
- the material of the valve plate 6 and the holding arms 15 has a high rigidity C.
- the rigidity C is part of the formula
- ⁇ is the resonance frequency and m is the mass of the valve head.
- w is significantly less than the stroke frequency, maximum one third of the stroke frequency of the piston (> 1200 Hz).
- the risk of the valve disc buckling is reduced, which also leads to delays in sealing the work area.
- the holding arms 15 are made as short as possible in order to achieve high restoring forces.
- the protrusion of the piston 3 is selected so that the opening stroke of the valve plate 6 is limited to up to 1 mm.
- a short overlap also has the effect that the acceleration of the valve plate 6 is small.
- a stroke catcher 18 is assigned to the valve plate 6.
- the stroke catcher 18 is arranged essentially centrally with respect to the piston 3 behind the valve plate 6 and is expediently made of elastomeric material in order to achieve a soft and resilient limitation of the stroke.
- Figure 3 shows a solution in which the piston has no protrusion. Its end face 4 is equipped in a manner known per se with projections 19 which serve the opening movement of the valve plate 6. The closing movement of the valve plate 6 produces a spring 21 made of the lightest possible material, since it is part of the valve mass.
- the projections 19 consist of a relatively soft elastomer, which deform elastically when touching the valve disk and thus on the one hand limit the acceleration of the valve mass and on the other hand contribute to the rapid closing movement. Silicon or similar materials are expedient as materials.
- the piston 3 is provided with a • Magnet 23 equipped, for example, as shown with a magnetic ring 23 inside the hollow piston 3.
- the material of the valve plate 6 is selected so that the magnet 23 exerts an attractive effect on it. It is thereby achieved that the valve plate 6 is held by the end face 4 of the piston 3 during its opening movement, which in this solution has an overhang at the top dead center. A completely dead space-free opening of valve 5 with an optimally short valve opening time is possible. Even the spring 21 can be omitted.
- both the piston 3 and the valve plate 6 are equipped with a magnet 23 or 24.
- the polarity of the magnets 23, 24 is chosen so that they repel each other.
- the valve 5 opens before the piston contacts the valve plate 6.
- the acceleration pulse exerted on the valve plate 6 can be kept small. Very short valve working times can be achieved in particular in connection with one or more lift catchers 18. Another advantage is that this solution is quiet since the piston 3 and valve plate 6 do not touch.
- the aim of the present invention is to strive for the ideal case in which the valve plate 6 exactly follows the movement of the piston 3 (or the movement of projections 19 on the piston). This is not the case with the prior art.
- the piston takes the valve plate with it during the valve opening phase (valve opening time). After reaching the top dead center of the piston, however, the valve plate continues its opening movement due to the acceleration forces exerted on it. Contact with the piston is released. Only after further uncontrolled oscillatory movements It begins its closing movement, which results in a relatively long valve closing time due to the delayed closing movement of the valve plate compared to the piston movement, which is further extended if the valve plate continues to oscillate after it has been placed on its seat.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003108421 DE10308421A1 (de) | 2003-02-27 | 2003-02-27 | Kolbenpumpe, vorzugsweise Kolbenvakuumpumpe, mit Auslassventil |
DE10308421 | 2003-02-27 | ||
PCT/EP2003/013215 WO2004076860A1 (de) | 2003-02-27 | 2003-11-25 | Kolbenpumpe, vorzugsweise kolbenvakuumpumpe, mit auslassventil |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1597480A1 true EP1597480A1 (de) | 2005-11-23 |
Family
ID=32841949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03767639A Withdrawn EP1597480A1 (de) | 2003-02-27 | 2003-11-25 | Kolbenpumpe, vorzugsweise kolbenvakuumpumpe, mit auslassventil |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1597480A1 (de) |
AU (1) | AU2003292100A1 (de) |
DE (1) | DE10308421A1 (de) |
WO (1) | WO2004076860A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010039829A1 (de) * | 2010-08-26 | 2012-03-01 | Prominent Dosiertechnik Gmbh | Membranpumpe mit trägheitsgesteuertem Leckergänzungsventil |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3005608A1 (de) * | 1980-02-15 | 1981-08-20 | Linde Ag, 6200 Wiesbaden | Kolbenpumpe |
DE19917009A1 (de) * | 1999-04-15 | 2000-10-19 | Leybold Vakuum Gmbh | Kolbenvakuumpumpe mit Gaseinlass und Gasauslass |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01182302A (ja) * | 1988-01-13 | 1989-07-20 | Unitika Ltd | 吸収性材料 |
DE19634517A1 (de) * | 1996-08-27 | 1998-03-05 | Leybold Vakuum Gmbh | Kolbenvakuumpumpe mit Auslaßventil |
DE19634518A1 (de) * | 1996-08-27 | 1998-03-05 | Leybold Vakuum Gmbh | Kolbenpumpe mit Entlastungsventil |
WO2000063555A1 (de) * | 1999-04-19 | 2000-10-26 | Leybold, Vakuum Gmbh | Schwingkolbenantrieb |
DE19926186A1 (de) * | 1999-06-09 | 2000-12-14 | Leybold Vakuum Gmbh | Kolbenvakuumpumpe mit Auslassventil |
-
2003
- 2003-02-27 DE DE2003108421 patent/DE10308421A1/de not_active Withdrawn
- 2003-11-25 WO PCT/EP2003/013215 patent/WO2004076860A1/de not_active Application Discontinuation
- 2003-11-25 AU AU2003292100A patent/AU2003292100A1/en not_active Abandoned
- 2003-11-25 EP EP03767639A patent/EP1597480A1/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3005608A1 (de) * | 1980-02-15 | 1981-08-20 | Linde Ag, 6200 Wiesbaden | Kolbenpumpe |
DE19917009A1 (de) * | 1999-04-15 | 2000-10-19 | Leybold Vakuum Gmbh | Kolbenvakuumpumpe mit Gaseinlass und Gasauslass |
Non-Patent Citations (1)
Title |
---|
See also references of WO2004076860A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10308421A1 (de) | 2004-09-09 |
AU2003292100A1 (en) | 2004-09-17 |
WO2004076860A1 (de) | 2004-09-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20050618 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
DAX | Request for extension of the european patent (deleted) | ||
RBV | Designated contracting states (corrected) |
Designated state(s): CH DE FR GB IT LI |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: LANGER, PETER Inventor name: HODAPP, JOSEF Inventor name: BAHNEN, RUDOLF Inventor name: BURGHARD, HANS-JOSEF |
|
17Q | First examination report despatched |
Effective date: 20100623 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20101104 |