EP2183508B1 - Pompe a vide de type seche comportant un dispositif d'etancheite aux fluides lubrifiants et element centrifugeur equipant un tel dispositif - Google Patents
Pompe a vide de type seche comportant un dispositif d'etancheite aux fluides lubrifiants et element centrifugeur equipant un tel dispositif Download PDFInfo
- Publication number
- EP2183508B1 EP2183508B1 EP08761080.4A EP08761080A EP2183508B1 EP 2183508 B1 EP2183508 B1 EP 2183508B1 EP 08761080 A EP08761080 A EP 08761080A EP 2183508 B1 EP2183508 B1 EP 2183508B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vacuum pump
- pump according
- bearing
- dry
- stator
- 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
- 239000012530 fluid Substances 0.000 title claims description 55
- 238000007789 sealing Methods 0.000 title claims description 36
- 230000001050 lubricating effect Effects 0.000 title claims description 11
- 238000005086 pumping Methods 0.000 claims description 45
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 239000002657 fibrous material Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 description 20
- 239000007789 gas Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 7
- 239000004519 grease Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 5
- 210000000078 claw Anatomy 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 208000017587 Polyrrhinia Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 210000003323 beak Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 210000002268 wool Anatomy 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
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
- F04C27/009—Shaft sealings specially adapted for pumps
-
- 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
- F04C2220/00—Application
- F04C2220/10—Vacuum
- F04C2220/12—Dry running
-
- 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/026—Lubricant separation
Definitions
- the present invention relates to a dry type vacuum pump such as a rotary lobe vacuum pump, in particular of multi-stage type such as "Roots” or “Claw” type or such as a spiral vacuum pump. (“Scroll”) or like a screw vacuum pump.
- a dry type vacuum pump such as a rotary lobe vacuum pump, in particular of multi-stage type such as "Roots” or “Claw” type or such as a spiral vacuum pump. (“Scroll”) or like a screw vacuum pump.
- these pumps comprise one or more stages placed in series in which circulates a gas to be pumped between a gas inlet inlet and a gas discharge outlet.
- the rotary lobe pumps “Roots” comprise two rotors of identical profiles, rotating inside a stator (pump body) in opposite directions. During rotation, the sucked gas is trapped in the free space between the rotors and the stator, then it is discharged by the exhaust. The operation is carried out without any mechanical contact between the rotors and the body of the pump, which allows the total absence of oil in the compression chamber.
- “Claw” double-nose pumps also include two lobe rotors, rotating in opposite directions in a cylinder, sucking the gas and compressing it.
- the shape of the lobes is particular to ensure dry compression.
- the rotors are carried by rotary shafts supported by at least one lubricated bearing, for example with oil or by grease.
- the rotation of the shafts in the bearings generates pollutants such as grease particles or drops of oil which, when subjected to pressure variations, can migrate to the pumping stages.
- a shaft seal for a vacuum pump according to the preamble of claim 1 is disclosed in the document JP61-291795 .
- the object of the present invention is therefore to provide a dry vacuum pump whose sealing device requires little or no maintenance operation on the pump, while ensuring that the pumping stages are free of oil or grease, and more particularly, free from mists or vapors of these lubricants.
- the subject of the invention is a dry type vacuum pump comprising at least one rotary shaft supported by at least one lubricated bearing and at least one lubricant fluid sealing device capable of coming from said bearing for sealing at the shaft passage, the sealing device being mounted between the lubricated bearing and a dry pumping stage, characterized in that the said sealing device comprises a centrifugal element mounted integrally in rotation on the said shaft and comprising at least a through duct capable of separating the lubricant fluids from the fluid likely to flow from said bearing to the dry pumping stage.
- the centrifuge element further comprises a filter body placed in the through conduit, such as, for example, a fibrous material.
- the through pipe is located closer to the shaft than the circumferential surface of the centrifuge element.
- the diameter of the orifice of the through pipe is greater on the bearing side than on the side of the dry pumping stage.
- the through pipe has a truncated cone shape whose top is located on the side of the dry pumping stage.
- a portion of the through pipe has a narrowing or that the through pipe is formed by a recess of the truncated cone-shaped centrifugal element whose axis of revolution coincides with the axis rotation of the centrifuge element and whose vertex communicates with a predefined number of orifices on the side of the pumping stage.
- the conductance of the through-pipe is greater than the conductance of a peripheral passage of the fluid formed between the circumferential surface of the centrifuge element and the inner wall of the stator.
- the sealing device comprises a check valve placed vis-à-vis the orifice of the through conduit located on the side of the pumping stage.
- the non-return valve is preferably formed by a disc slidably mounted on the rotary shaft.
- the peripheral passage has a labyrinth seal.
- the labyrinth seal may have a plurality of rings mounted in the stator and the circumferential surface of the centrifuge element may have a plurality of corresponding grooves.
- each ring is open and elastic to be mounted in the stator.
- each ring at rest is greater than the diameter of the inner wall of the stator so that after insertion of the rings in the stator, they are pressed against the inner wall of the stator by the elastic force of the Ring.
- the sealing device further comprises a deflector mounted on the shaft between the bearing and the centrifugal element.
- the invention also relates to a lubricated fluid sealing device centrifugal element intended to be mounted integrally in rotation on a rotary shaft of dry type vacuum pump, between a lubricated bearing and a dry pumping stage, characterized in that it comprises at least one through pipe through which a fluid is able to flow from the bearing to the dry pumping stage to separate the lubricant fluids fluid.
- the invention applies to a dry type vacuum pump comprising at least one rotary shaft supported by at least one lubricated bearing and at least one lubricant fluid sealing device capable of coming from the bearing for sealing at the level of the shaft passage, the sealing device being mounted between the lubricated bearing and a dry pumping stage.
- a vacuum pump such as a vacuum pump comprising two rotary lobe shafts, in particular of multi-stage type, such as "Roots” or “Claw” type or of a similar principle, there are therefore four sealing devices at the four levels of the pump.
- the invention also applies to any type of dry vacuum pump, such as spiral vacuum pumps or screw vacuum pumps.
- the figure 1 represents a part of the vacuum pump 1 according to a first embodiment of the invention.
- the inside of the stator 3 of the vacuum pump 1 comprises a bearing 5, a pumping stage 7 and a sealing device 9 to the lubricated fluids for the passage of a rotary shaft 11, mounted between the bearing 5 and the pumping stage 7.
- the bearing 5 comprises a bearing 13 lubricated with a fluid, such as grease or oil.
- a fluid such as grease or oil.
- the bearing 5 is advantageously in communication with an oil sump (not shown) also distributing the oil to the gears of the shafts.
- the shaft 11 rotatable about the axis of rotation 14 extends into the pump stage 7 where it carries a rotor 15 such as rotating lobes.
- the pumping stage 7 is said to be “dry” because in operation, the rotors 15 rotate inside the stator 3 in opposite directions without any mechanical contact between the rotors 15 and the body 3 of the pump 1, which allows the total absence of oil.
- the sealing device 9 greatly limits the passage of lubricating fluids such as grease or oil from the bearing 5 to the dry pumping stages 7 while allowing the shaft 11 to rotate when the vacuum pump 1 is in operation.
- the sealing device 9 comprises a centrifugal element 17 integrally mounted in rotation on the shaft 11 and comprising at least one through conduit 19 capable of separating the lubricant fluids from the fluid likely to flow from the bearing 5 to the dry pumping stage 7.
- the fluid capable of flowing from the bearing to the dry pumping stage comprises a mixture of lubricating fluid and gas.
- the centrifugal element 17 will rotate at the same rotational speed as the shaft 11, for example at 6000 rpm for a primary vacuum pump Roots type.
- the through pipe 19 carried by the centrifugal element 17 will also rotate about the axis of rotation 14 of the shaft 11 of the pump 1 and at the same speed of rotation.
- the lubricant fluid in the form of mist, liquid or residual particles having a mass or a density greater than the gas, flowing in the through pipe 19, will be removed from the center 14 of the centrifugal element 17.
- centrifugal force created by the rapid rotation of the centrifugal element 17 projects the lubricant fluids on the inner side faces 21 of the pipe 19, thus separating the lubricating fluid from the fluid by centrifugation.
- the sealing device separates the mist and / or the vapor from the lubricant, from the fluid.
- the diameter of the orifice 39 of the through pipe 19 is greater on the bearing side 5 than on the dry pump stage side 7.
- a part of the through conduit 19 has a narrowing 53 formed by a recess of the centrifugal element 17 in the form of a truncated cone whose axis of revolution coincides with the axis of rotation 14 of the centrifugal element 17 and whose top communicates with a predefined number of orifices 39 on the side of the pumping stage 7.
- the frustoconical shape will in particular allow, by the effect of centrifugal force, to guide the vapors and mists of lubricants trapped along the walls in order to evacuate them from the pipe 19.
- the lubricated fluid is then directed to the base of the centrifuge element 17 allowing the sealing device to be self-cleaning.
- the figure 2 represents a centrifugal element 17 having eight orifices 39 of through pipes 19 and an opening 25 in the center of the centrifugal element 17 for the passage of the shaft 11.
- the centrifuge element 17 advantageously comprises a filter body placed in the through conduit 19, such as a fibrous material (not shown).
- the fibrous material may for example be based on steel wool or glass wool.
- the vapors and / or oil mist trapped in the filter body will also be projected towards the walls of the centrifugal element 17, and then guided towards the base thereof.
- the filter body self-cleans.
- the sealing device 9 comprises a deflector 27 mounted on the shaft 11 between the bearing 5 and the centrifugal element 17.
- the deflector 27 makes it possible to modify the flow of the fluid coming from the bearing 5 to form a first means of coarse separation of the lubricants in the form of liquids, greases and particles originating from the bearing 5.
- a corresponding groove 29 is provided in the stator 3 located opposite the peripheral end 31 of the deflector 27.
- a channel (not shown) starts from the groove 29 and extends into the stator 3 of the pump 1.
- This channel can communicate with the oil pan of lubricated bearings.
- the lubricant flowing in the groove 29 is then driven into the channel and then to the oil sump.
- the through pipe 19 is situated closer to the shaft 11 than to the circumferential surface 33 of the centrifugal element 17, as illustrated by FIG. figure 2 .
- the complementary rolling effect is produced by a localized overpressure between the deflector 27 and the centrifugal element 17. It is due to the small space between the deflector 27 and the centrifugal element 17.
- the rolling effect also makes it possible to reject the lubricants at the periphery of the deflector 27.
- the conductance of the through conduit 19 is greater than the conductance of the peripheral passage of the fluid formed between the circumferential surface 33 of the centrifugal element 17 and the inner wall 35 of the stator 3.
- the flow of the fluid is preferred through the through conduit 19 of the centrifuge element 17 rather than the periphery thereof, when the pressure on the bearing side 5 is higher.
- the fluid is well filtered by the centrifugal element 17 and the pressure differential on either side of it is limited, the flow through the peripheral passage being very small in view of the high conductance.
- the sealing device 9 comprises a non-return valve 37 vis-a-vis the orifice 39 of the through pipe 19, situated on the side of the pumping stage 7.
- the position of the valve 37 makes it possible to orient the preferred path of the fluid as a function of the pressure differential.
- the fluid When moved away from the orifice 39, the fluid preferably flows through the through conduit 19 since it has the largest conductance.
- the fluid When pressed against the orifice 39, the fluid preferably flows through the peripheral passage of the centrifugal element 17.
- the opening and closing of the pipe 19 by the valve 37 is naturally controlled by the pressure difference on either side thereof.
- the valve 37 is placed on the shaft 11 so as to be in a position remote from the orifice 39 when the pressure on the bearing side 5 is greater than the pressure of the pumping stage 7.
- the sealing device 9 is optimized because the turbulent movements of gas and lubricants inside the through pipe 19 are avoided, the flow through the through pipe 19 occurring only in a only sense.
- the pressures on either side of the sealing device 9 can therefore be automatically equilibrated by two separate passages depending on whether the fluid is loaded with lubricants or not.
- nonreturn valve 37 by a simple disc mounted in axial sliding on the shaft 11, for example a metal disc, the travel of the valve 37 being defined by the centrifugal element 17 and a stop 41 fixed to the tree 11.
- the radius of the valve 37 is provided sufficiently large to be able to obstruct the orifices 39 of the through pipes 19 opening on the side of the pumping stage 7.
- valve 37 is thus pushed by the fluid flow to the pumping stage 7 and retained by the stop 41 (see FIG. figure 1 ) when the pressure of the bearing 5 is greater than the pressure of the pumping stage 7, thus releasing the passage through the through pipe 19 of the centrifugal element 17.
- valve 37 is attracted to the centrifugal element 17 by the fluid flow when the pressure of the bearing 5 is lower than the pressure of the pump stage 7, obstructing the passage of the fluid in the through pipe 19.
- the peripheral passage of the fluid is formed by a labyrinth seal 43.
- the labyrinth seal 43 comprises a series of baffles limiting the conductance of the passage between the stator 3 and the centrifugal element 17.
- the baffles are formed by corresponding grooves and grooves respectively carried by the stator and the rotary member and centered vis-à-vis non-contact to prevent significant friction at high rotational speeds of the rotary member.
- the peripheral passage is thus formed between the circumferential surface 33 of the centrifugal element 17 and the stator 3 of the pump 1, which makes it possible to avoid friction at the high rotational speed of the centrifugal element. 17.
- the invention advantageously provides and independently of the pipe 19, a labyrinth seal 43 characterized in that it comprises a plurality of rings 45 mounted in the stator 3 and in that the circumferential surface 33 of the centrifuge element 17 has several corresponding grooves 47.
- the rings 45 are distinct elements of the stator 3 and are open and resilient in order to be mounted in the stator 3.
- This arrangement facilitates assembly.
- each ring 45 at rest is greater than the diameter of the inner wall 35 of the stator 3 so that after insertion of the rings 45 in the stator 3, they are pressed against the inner wall 35 of the stator 3 by the elastic force of the ring 45.
- an auxiliary mounting tube is disposed around the centrifugal element 17 carrying the rings 45, so that the rings 45 are compressed, the ends of each ring 45 joining.
- the elasticity of the rings 45 is chosen so that they remain firmly fixed to the stator 3.
- a labyrinth seal 43 is thus obtained between the stator 3 and the centrifugal element 17 whose grooves 47 and grooves 45 are easy to fabricate, center and assemble.
- this type of labyrinth seal 43 applies to both the centrifugal element 17 of the present invention and any rotary element rotating in a stator, such as a rotor or a rotating shaft.
- the flow of fluid from the bearing 5 is deflected by the baffle 27, separating coarsely the particles and lubricating liquids.
- valve 37 is pushed towards the pumping stage 7 thus freeing access to the through conduit 19 so that a majority of the fluid flows through the centrifuge element 17.
- the gas is thus separated from the lubricating fluids by centrifugation.
- the valve 37 is attracted to the centrifuge element 17, obstructing the passage of fluid in the through conduit 19, so that a majority of the fluid flows through the peripheral passage, causing the lubricant residues.
- constriction 53 of the through conduit 19 may be formed by a constriction of the conduit 19 (not shown).
- FIGS 4 and 5 illustrate other advantageous embodiments of the invention in which the diameter of the orifice 39 of the through pipe 19 is greater on the bearing side 5 than on the side of the dry pumping stage 7.
- the through pipe 19 has a narrowing section forming a step whose reduced diameter portion opens on the side of the dry pumping stage 7.
- This variant has the advantage of being simple.
- such a pipe 19 can be obtained for example by drilling with a stepped forest.
- the through pipe 19 has a truncated cone shape whose top is located on the side of the dry pumping stage 7.
- the shrinkage 53, partial or continuous, of the through-pipe 19 makes it possible to brake the lubricant residues projected on the internal lateral faces 21 of the pipe 19.
- the through pipe 19 has the shape of a tube ( figure 6 ).
- a vacuum pump 1 comprising at least one sealing device 9 for lubricating fluids comprising a centrifugal element 17 mounted to rotate integrally with the shaft 11 and comprising at least one through conduit 19, makes it possible to provide a Lubricant tightness without friction parts and therefore without wear, requiring little maintenance.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0757146A FR2920207B1 (fr) | 2007-08-23 | 2007-08-23 | Pompe a vide de type seche comportant un dispositif d'etancheite aux fluides lubrifiants et elements centrifugeur equipant un tel dispositif |
PCT/EP2008/057574 WO2009024370A1 (fr) | 2007-08-23 | 2008-06-16 | Pompe a vide de type seche comportant un dispositif d'etancheite aux fluides lubrifiants et element centrifugeur equipant un tel dispositif |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2183508A1 EP2183508A1 (fr) | 2010-05-12 |
EP2183508B1 true EP2183508B1 (fr) | 2017-08-02 |
Family
ID=39361781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08761080.4A Active EP2183508B1 (fr) | 2007-08-23 | 2008-06-16 | Pompe a vide de type seche comportant un dispositif d'etancheite aux fluides lubrifiants et element centrifugeur equipant un tel dispositif |
Country Status (7)
Country | Link |
---|---|
US (1) | US8465269B2 (zh) |
EP (1) | EP2183508B1 (zh) |
JP (1) | JP5037688B2 (zh) |
KR (1) | KR101227220B1 (zh) |
CN (1) | CN101784824B (zh) |
FR (1) | FR2920207B1 (zh) |
WO (1) | WO2009024370A1 (zh) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI510715B (zh) * | 2009-09-25 | 2015-12-01 | Ulvac Inc | 真空乾式泵浦 |
FR2962173B1 (fr) * | 2010-06-30 | 2012-08-03 | Alcatel Lucent | Pompe a vide de type seche |
JP5631155B2 (ja) * | 2010-10-27 | 2014-11-26 | 三菱重工業株式会社 | 軸シール機構及びこれを備える回転機械 |
JP6041449B2 (ja) * | 2012-09-14 | 2016-12-07 | 株式会社前川製作所 | 油冷式スクリュー圧縮機システム及び油冷式スクリュー圧縮機 |
CN105650282B (zh) * | 2014-11-12 | 2017-09-15 | 中国科学院沈阳科学仪器股份有限公司 | 一种离心非接触式密封结构 |
CN105736704A (zh) * | 2014-12-11 | 2016-07-06 | 舍弗勒技术有限两合公司 | 唇形油封及轴承 |
CN105065276A (zh) * | 2015-07-22 | 2015-11-18 | 宋东方 | 干式螺杆真空泵组合式密封装置 |
DE202016106107U1 (de) | 2016-10-31 | 2018-02-01 | Hugo Vogelsang Maschinenbau Gmbh | Drehkolbenpumpe mit Sperrkammerdichtung |
EP3536962B1 (en) * | 2018-03-07 | 2021-06-02 | Entecnia Consulting, S.L.U. | Rotary-vane vacuum pump and outlet assembly thereof |
FR3078748B1 (fr) * | 2018-03-07 | 2020-03-27 | Pfeiffer Vacuum | Pompe a vide de type seche |
CN113175480B (zh) * | 2021-05-18 | 2023-01-06 | 杰锋汽车动力系统股份有限公司 | 一种氢气循环泵轴承结构 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3601307A (en) * | 1970-03-19 | 1971-08-24 | Pennwalt Corp | Centrifuge with spindle-sealing means |
NO138608C (no) * | 1973-07-05 | 1978-10-04 | Thune Eureka As | Neddykkbar vaeskepumpe. |
FR2320458A1 (fr) * | 1975-08-08 | 1977-03-04 | Europ Turb Vapeur | Dispositif de refroidissement d'un joint |
DE2700226C2 (de) * | 1977-01-05 | 1985-04-04 | Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh, 6334 Asslar | Drehkolbengebläse oder -vakuumpumpe |
US4386786A (en) * | 1982-02-08 | 1983-06-07 | Merck & Co., Inc. | Adjustable pump seal with tapered conical members |
DE3231171C1 (de) * | 1982-08-21 | 1983-05-19 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen | Sperrfluessigkeitsdichtung |
JPS61291795A (ja) * | 1985-06-19 | 1986-12-22 | Hitachi Ltd | 粗引真空ポンプの軸封装置 |
JPH03185285A (ja) * | 1989-12-15 | 1991-08-13 | Mitsubishi Oil Co Ltd | 気体除去機能付回転型液体流送用ポンプ |
DE4211809A1 (de) * | 1992-04-08 | 1993-10-14 | Klein Schanzlin & Becker Ag | Schwimmringdichtung |
ES2109592T3 (es) * | 1993-07-14 | 1998-01-16 | Atlas Copco Airpower Nv | Transmision con cojinete giratorio y junta de estanqueidad utilizada. |
US6325382B1 (en) * | 1999-05-21 | 2001-12-04 | Nippon Pillar Packing Co., Ltd. | Non-contact type mechanical seal |
DE10011063A1 (de) * | 2000-03-07 | 2001-09-27 | Daimler Chrysler Ag | Labyrinthdichtung zwischen drehbaren Bauteilen |
DE10113593A1 (de) * | 2001-03-20 | 2002-09-26 | Sms Demag Ag | Dichtungsvorrichtung für Walzenlager |
JP4617615B2 (ja) | 2001-07-05 | 2011-01-26 | 株式会社豊田自動織機 | 真空ポンプにおける油洩れ防止構造 |
CN2665413Y (zh) * | 2003-11-29 | 2004-12-22 | 潍柴动力股份有限公司 | 高压油泵传动轴的密封装置 |
DE202004019718U1 (de) * | 2004-12-21 | 2005-03-03 | Burgmann Industries Gmbh & Co. Kg | Anordnung aus einer Welle mit darauf montierter Gleitringdichtung |
DE102005015212A1 (de) | 2005-04-02 | 2006-10-05 | Leybold Vacuum Gmbh | Wellendichtung |
ATE461366T1 (de) * | 2005-09-21 | 2010-04-15 | High Technology Invest Bv | Lagerdichtungsanordung mit labyrinthdichtungs- und schraubdichtungskombination |
DE102007060890A1 (de) * | 2007-12-14 | 2009-06-18 | Rolls-Royce Deutschland Ltd & Co Kg | Abdichtung mindestens einer Welle mit mindestens einer hydraulischen Dichtung |
EP2404087B1 (de) * | 2009-03-03 | 2014-05-07 | SEW-EURODRIVE GmbH & Co. KG | Anordnung zur berührungslosen abdichtung einer drehbar gelagerten welle zu einem gehäuse hin und getriebe |
-
2007
- 2007-08-23 FR FR0757146A patent/FR2920207B1/fr not_active Expired - Fee Related
-
2008
- 2008-06-16 US US12/452,978 patent/US8465269B2/en active Active
- 2008-06-16 CN CN2008801040282A patent/CN101784824B/zh active Active
- 2008-06-16 WO PCT/EP2008/057574 patent/WO2009024370A1/fr active Application Filing
- 2008-06-16 EP EP08761080.4A patent/EP2183508B1/fr active Active
- 2008-06-16 KR KR1020107003820A patent/KR101227220B1/ko active IP Right Grant
- 2008-06-16 JP JP2010521367A patent/JP5037688B2/ja not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
KR101227220B1 (ko) | 2013-01-28 |
CN101784824A (zh) | 2010-07-21 |
FR2920207B1 (fr) | 2009-10-09 |
EP2183508A1 (fr) | 2010-05-12 |
US20100189583A1 (en) | 2010-07-29 |
CN101784824B (zh) | 2013-07-03 |
JP2010537109A (ja) | 2010-12-02 |
FR2920207A1 (fr) | 2009-02-27 |
JP5037688B2 (ja) | 2012-10-03 |
US8465269B2 (en) | 2013-06-18 |
WO2009024370A1 (fr) | 2009-02-26 |
KR20100036374A (ko) | 2010-04-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2183508B1 (fr) | Pompe a vide de type seche comportant un dispositif d'etancheite aux fluides lubrifiants et element centrifugeur equipant un tel dispositif | |
EP2199614B1 (fr) | Machine combinée de pompage et de séparation pour circuit d'huile de turboréacteur | |
EP3285908B1 (fr) | Dispositif et agencement à élément filtrant pour séparer l'huile des gaz de carter d'un moteur à combustion interne | |
FR2933626A1 (fr) | Dispositif avec rotor a media coalesceur pour separer l'huile des gaz de carter d'un moteur a combustion interne. | |
EP3175091B1 (fr) | Élément de turbomachine comprenant un moyen d'étanchéité auxiliaire et procédé de test de cet élément | |
CA2719472A1 (fr) | Dispositif et procede d'equilibrage de pression dans une enceinte palier de turboreacteur | |
EP2402613B1 (fr) | Pompe à vide de type sèche | |
EP1749977B1 (fr) | Systeme d'etancheite de la chambre de lubrification arriere d'un turboreacteur | |
FR2488970A1 (fr) | Joint d'etancheite pour paliers de turbochargeur | |
EP1965041B1 (fr) | Système de déshuilage pour moteur d`aéronef | |
EP3132123B1 (fr) | Pompe à engrenages à carburant, prévue notamment comme pompe à haute pression | |
EP3762612B1 (fr) | Pompe à vide de type sèche | |
FR2945330A1 (fr) | Pompe centrifuge a double echappement. | |
EP0097548A1 (fr) | Groupe motopompe pour puits de forage et procédé de protection s'y rapportant | |
FR3075867A1 (fr) | Dispositif de deshuilage d'une enceinte de lubrification de turbomachine | |
CA2945728C (fr) | Filtrage d'un flux gaz/particules | |
FR3090035A1 (fr) | Dispositif de deshuilage et d’etancheite d’une enceinte de lubrification de turbomachine | |
FR2816995A1 (fr) | Installation de climatisation avec dispositif pour le depot du lubrifiant et compresseur | |
FR3075868B1 (fr) | Tube de degazage pour une turbomachine d'aeronef a reducteur | |
EP0421900A1 (fr) | Dispositif d'étanchéité pour organe cylindrique mobile axialement et/ou en rotation dans une chambre | |
FR3119209A1 (fr) | Pompe à vide de type sèche et groupe de pompage | |
WO2022248220A1 (fr) | Machine tournante, groupe moto-pompe primaire muni de cette machine tournante | |
EP2428681A1 (fr) | Pompe de circulation | |
FR2988783A3 (fr) | Dispositif de reduction de fuites internes de pompes a roue fermee |
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: 20100323 |
|
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 HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ADIXEN VACUUM PRODUCTS |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PFEIFFER VACUUM |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20170221 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: AT Ref legal event code: REF Ref document number: 914848 Country of ref document: AT Kind code of ref document: T Effective date: 20170815 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: FRENCH |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602008051401 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20170802 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 914848 Country of ref document: AT Kind code of ref document: T Effective date: 20170802 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20171102 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20171102 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20171103 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20171202 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602008051401 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 11 |
|
26N | No opposition filed |
Effective date: 20180503 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20180616 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20180630 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180616 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180616 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180616 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180630 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20080616 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170802 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230524 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20240627 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20240626 Year of fee payment: 17 |