EP2149710B1 - Vacuum pump arrangement - Google Patents
Vacuum pump arrangement Download PDFInfo
- Publication number
- EP2149710B1 EP2149710B1 EP09008725.5A EP09008725A EP2149710B1 EP 2149710 B1 EP2149710 B1 EP 2149710B1 EP 09008725 A EP09008725 A EP 09008725A EP 2149710 B1 EP2149710 B1 EP 2149710B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flange
- share
- ring segments
- ring
- vacuum 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.)
- Not-in-force
Links
- 238000010008 shearing Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000126 substance Substances 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
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
- F04D19/042—Turbomolecular vacuum pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0292—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
Definitions
- the invention relates to a Vakuumpumpan extract according to the preamble of claim 1, such as from US 2003/175113 A1 known.
- Vacuum pumps with fast rotating rotors have become indispensable in many vacuum-assisted manufacturing processes.
- the rotors rotate at speeds of tens of thousands of revolutions per minute to produce the pumping action. Due to these speeds and the weight of the rotor, this thus stores a high kinetic energy. If there is a blocking of the rotor, this energy is released. There are numerous measures taken to prevent the blocking of the rotor or detect a leading malfunction early. Nevertheless, vacuum arrangements have to be designed in such a way that they are safe even when the worst-case scenario is an accident. Safe means that no parts fly around or dangerous substances are released.
- the solution with the features of claim 1 has the advantage that it is inexpensive to implement and can be easily retrofitted to existing facilities. Due to the design of the retaining element such that the flange is secured by positive engagement against movement perpendicular to the flange plane, the safety is increased according to the following principle. The resistance of the arrangement against forces and moments which lead to a tearing of the vacuum pump in a direction perpendicular to the flange plane is greatly increased. It is easy to completely prevent this movement by the design, because the design options are not limited by standards. The yielding of individual screws by overloading does not lead to a subsequent failure of the complete screw through the retaining element according to the invention. A further advantage of the invention is that the vacuum pumping arrangement is secured in the axial direction against the axial forces occurring during blocking of the rotor by the positive locking.
- the vacuum chamber has a chamber flange and the holding element is designed such that the flange and the chamber flange form-lockingly connect and allow rotation about the axis of symmetry.
- the symmetry axis coincides with single-suction vacuum pumps with the rotor axis.
- the vacuum pump can rotate about this axis and convert kinetic energy into other forms of energy during the rotation by friction, for example heat. Due to the positive connection, it is held in the axial direction and can not tear away from the Vakuumpumpan ever. Thus, safety is increased by preventing part tearing and lowering the load on the chamber flange.
- the holding element has a plurality of circumferentially offset from each other and connected together to form a closed ring ring segments.
- All of the aforementioned design forms can be further developed by the strength of the screw is dimensioned such that the screw yields at a predefined shearing load.
- This predefined shearing load is dimensioned so that the screw transmits only the maximum tolerable for the vacuum chamber moment on this. If the torque created during blocking exceeds the maximum tolerable moment, the screw will yield. This will cause the vacuum pump to move according to its degrees of freedom.
- the only degree of freedom of all developments is the rotation about the axis of symmetry, so that a tearing of the vacuum pump can not take place and kinetic energy is safely degraded by the braked rotation.
- Another development proposes providing the surface of the holding element in contact with the flange with a defined and constant coefficient of friction. This makes it possible to allow a rotation, which rubs the surfaces of flange and retaining element against each other, take place in a defined manner. This makes it possible, in particular, during a rotation of the vacuum pump necessary Make measures cost-effective. These measures include flexible prevacuum lines and excess length of the electrical connections.
- the vacuum pumping arrangement according to FIG. 1 includes a vacuum chamber 100 and a vacuum pump 102.
- the vacuum pump has a flange 108, which is detachably connected to a screw 110 with the vacuum chamber. Normally, twelve screws are distributed symmetrically over the circumference of the flange.
- the flange is part of the housing 104 of the vacuum pump.
- This housing houses a rotor 106 which includes a fast rotating shaft 161 and a rotor disk 162 carrying blades.
- a stator disk 130 which likewise carries blades, is arranged at a small axial distance from the rotor disk. Rotor disk and stator disc can come into contact with each other in the worst possible accident so that blocked in the wake of the rotor.
- Rotor and stator are designed according to Becker in the example shown. Alternatively, they may be designed in whole or in part according to Holweck or Gaede, since these also require a fast rotation of the rotor.
- a centering ring 140 and a seal 142 are seated, which effect a precise alignment of the vacuum pump to the vacuum chamber and a vacuum-tight seal of the arrangement.
- the arrangement has a holding element 120, which is designed such that the flange is secured by positive engagement against movement perpendicular to the flange plane.
- This configuration is achieved by a ring 122 and a stop element 124.
- the ring surrounds the flange and centering ring and has an axial thickness equal to the sum of the thickness of the centering ring and the thickness of the flange.
- a stop element 124 is connected to the ring.
- this compound in the example shown is releasably generated by stopper screws 128. Flange and stop element touch each other.
- the contact surface 126 is provided with a coating which has a defined and constant coefficient of friction.
- FIG. 2 is a section through the vacuum arrangement along the line II 'shown.
- This cutting line is perpendicular to the rotor axis and to the axis of symmetry of flange and ring. It lies in a plane parallel to the flange plane.
- the housing 104 can be seen cut.
- On the flange 108 results in a plan view.
- the flange is surrounded by the ring 122. Between them is a gap that is not drawn to scale. This gap allows easy movements in the flange plane, which simplifies the mounting of the vacuum pump to the vacuum chamber.
- the gap also compensates for slight inaccuracies in the centering of the ring and centering ring. This reduces the requirements for precision in the assembly of the ring.
- a stop member 124 is releasably connected to the ring by stopper screws 128.
- the stop members have recesses 170 leaving room for the screws 110.
- the recesses may be designed as elongated recesses 171, wherein the screw 110 sits at that end of the recess, which comes first in relation to the direction of rotor rotation. This allows a rotation of the vacuum pump relative to the stop element by a defined angle, should the screws 110 already be destroyed. Together with the coating, the maximum twist angle can be determined for the worst case to be assumed.
- FIG. 3 shows a section through the arrangement in a plane in which the symmetry axis lies.
- the vacuum pump 202 has a housing 204, in which in particular the stator disk 230 and the rotor 206 are arranged.
- the rotor has a shaft 261 and at least one rotor disk 262, which is equipped with blades.
- Rotor and stator are designed according to Becker in the example shown. Alternatively, they may be designed in whole or in part according to Holweck or Gaede, since these also require a fast rotation of the rotor.
- To the housing 204 a flange 208 is connected to the housing 204.
- the vacuum chamber 200 has a tubular neck with a chamber flange 201. Between the chamber flange and flange are a centering ring 240 for mutual alignment of the flanges and a sealing ring 242 for vacuum-tight sealing of the flange connection. Screws 210 releasably connect the flanges. Both flanges are surrounded by the components of the support member 220, which is designed such that the flange is secured by positive engagement against movement perpendicular to the flange plane.
- the retaining element comprises the ring segments 222a, 222c, 224a and 224c.
- the fit is achieved by contacting a portion of the ring segments 222a and 222c with the chamber flange and another portion of the ring segments 224a and 224c with the flange in touching contact.
- the ring segments engage positively in one another and are interconnected.
- a part of the ring segments threaded portions 228 which through holes in other part of the ring segments are plugged.
- the connection is secured by nuts 229 engaged with the threaded portions.
- FIG. 4 shows a section along the line II-II 'by the arrangement of FIG. 3 ,
- the cutting plane lies in the plane of the flange of the vacuum pump.
- the flange 208 can be seen centrally, which has twelve distributed on the circumference holes through which screws 210 are inserted.
- the flange is surrounded by four ring segments 222a, 222b, 222c and 222d. In the circumferential direction offset from these four further ring segments 224a, 224b, 224c and 224d are arranged.
- the ring segments 222a, 222b, 222c, 222d and 224a, 224b, 224c and 224d are according to FIG FIG. 3 screwed together, thus forming a closed ring surrounding the flanges 201 and 208.
- FIG. 5 shows a section along the line III-III '.
- a partial settlement of the interconnected ring segments can be seen.
- Each of the ring segments 222a, 222b and 22d has a plurality of threaded portions 228. These pass through holes 250 in the ring segments 224a, 224b and 224d. With the threaded portions nuts 229 are engaged, so that a fuse of the ring segments is effected against each other.
- the ring segments are offset from one another. This means that each of the threaded sections ring segments is connected to two drilled ring segments. Likewise, each of the drilled ring segment is connected to two ring segments provided with threaded portions.
- the vacuum pump can now only rotate about its axis.
- the flanges turn against each other.
- a complete tearing of the vacuum pump is excluded even in the worst case.
- the coefficient of friction is such that the angle of rotation in the worst case is only a few degrees, in particular about 5 degrees. The friction must at the same time be low enough to avoid the introduction of excessive torque in the chamber flange.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Non-Positive Displacement Air Blowers (AREA)
Description
Die Erfindung betrifft eine Vakuumpumpanordnung nach dem Oberbegriff des Anspruchs 1, wie beispielsweise aus der
Ferner beschreibt die
Aus vielen vakuumunterstützten Herstellungsprozessen sind Vakuumpumpen mit schnell drehenden Rotoren heute nicht mehr wegzudenken. Die Rotoren drehen dabei mit Drehzahlen von einigen zehntausend Umdrehungen pro Minute, um die Pumpwirkung zu erzeugen. Aufgrund dieser Drehzahlen und dem Eigengewicht des Rotors speichert dieser somit eine hohe kinetische Energie. Kommt es zu einem Blockieren des Rotors, wird diese Energie freigesetzt. Es werden zahlreiche Maßnahmen ergriffen, die das Blockieren des Rotors verhindern oder eine dazu führende Fehlfunktion frühzeitig erkennen. Trotzdem müssen Vakuumanordnungen so gestaltet werden, dass sie auch dann sicher sind, wenn als schlimmster anzunehmender Unfall das Blockieren eintritt. Sicher bedeutet, dass keine Teile umherfliegen oder gefährliche Stoffe freigesetzt werden.Vacuum pumps with fast rotating rotors have become indispensable in many vacuum-assisted manufacturing processes. The rotors rotate at speeds of tens of thousands of revolutions per minute to produce the pumping action. Due to these speeds and the weight of the rotor, this thus stores a high kinetic energy. If there is a blocking of the rotor, this energy is released. There are numerous measures taken to prevent the blocking of the rotor or detect a leading malfunction early. Nevertheless, vacuum arrangements have to be designed in such a way that they are safe even when the worst-case scenario is an accident. Safe means that no parts fly around or dangerous substances are released.
Erschwert wird die Konstruktion sicherer Verbindungen durch Vorgaben aus Normen. Insbesondere gilt dies für Vakuumpumpanordnungen, in denen Vakuumpumpe und Vakuumkammer durch eine Schraubverbindung lösbar miteinander verbunden sind. Die Normen schreiben Anzahl und Durchmesser der Schrauben vor. Dies setzt den übertragbaren Drehmomenten Grenzen.The design of secure connections is made more difficult by specifications from standards. This applies in particular to vacuum pump arrangements in which the vacuum pump and vacuum chamber are detachably connected to one another by a screw connection. The standards prescribe the number and diameter of the screws. This limits the transferable torques.
Es ist daher Aufgabe der Erfindung, eine Vakuumpumpanordnung mit Schraubverbindung zwischen Vakuumkammer und Vakuumpumpe vorzustellen, die im Schadensfall eine erhöhte Sicherheit gewährleistet.It is therefore an object of the invention to provide a vacuum pump assembly with screw connection between the vacuum chamber and the vacuum pump, which ensures increased safety in the event of damage.
Diese Aufgabe wird gelöst durch eine Vakuumpumpanordnung mit den Merkmalen des Anspruchs 1.This object is achieved by a vacuum pump arrangement having the features of claim 1.
Die abhängigen Ansprüche 2 und 3 geben vorteilhafte Weiterbildung an.The dependent claims 2 and 3 indicate advantageous development.
Die Lösung mit den Merkmalen des Anspruchs 1 bietet den Vorteil, dass sie kostengünstig umzusetzen ist und an bereits bestehenden Anlagen leicht nachgerüstet werden kann. Durch die Gestaltung des Halteelements derart, dass der Flansch durch Formschluss gegen eine Bewegung senkrecht zur Flanschebene gesichert ist, wird die Sicherheit nach dem folgenden Prinzip erhöht. Die Widerstandsfähigkeit der Anordnung gegen Kräfte und Momente, die zu einem Abreißen der Vakuumpumpe in eine Richtung senkrecht zur Flanschebene führen, wird sehr stark erhöht. Es ist leicht, durch die Gestaltung diese Bewegung komplett zu verhindern, denn die Gestaltungsmöglichkeiten sind nicht durch Normen begrenzt. Das Nachgeben einzelner Schrauben durch Überlastung führt durch das erfindungsgemäße Halteelement nicht zu einem nachfolgenden Versagen der kompletten Schraubverbindung. Ein weiterer Vorteil der Erfindung ist, dass die Vakuumpumpanordnung gegen bei einem Blockieren des Rotors auftretende axiale Kräfte durch den Formschluss in axialer Richtung gesichert wird.The solution with the features of claim 1 has the advantage that it is inexpensive to implement and can be easily retrofitted to existing facilities. Due to the design of the retaining element such that the flange is secured by positive engagement against movement perpendicular to the flange plane, the safety is increased according to the following principle. The resistance of the arrangement against forces and moments which lead to a tearing of the vacuum pump in a direction perpendicular to the flange plane is greatly increased. It is easy to completely prevent this movement by the design, because the design options are not limited by standards. The yielding of individual screws by overloading does not lead to a subsequent failure of the complete screw through the retaining element according to the invention. A further advantage of the invention is that the vacuum pumping arrangement is secured in the axial direction against the axial forces occurring during blocking of the rotor by the positive locking.
Erfindungsgemäß weist die Vakuumkammer einen Kammerflansch auf und das Halteelement ist derart gestaltet, dass Flansch und Kammerflansch formschlüssig verbindet und eine Drehung um die Symmetrieachse zulässt. Die Symmetrieachse fällt bei einflutigen Vakuumpumpen mit der Rotorachse zusammen. Im Falle des Blockierens des Rotors kann sich die Vakuumpumpe um diese Achse drehen und bei der Drehung durch Reibung Bewegungsenergie in andere Energieformen umsetzen, beispielsweise Wärme. Durch den Formschluss wird sie in axialer Richtung gehalten und kann sich nicht von der Vakuumpumpanordnung losreißen. Somit wird die Sicherheit erhöht, indem Abreißen von Teilen verhindert und die Belastung für den Kammerflansch gesenkt wird.According to the invention, the vacuum chamber has a chamber flange and the holding element is designed such that the flange and the chamber flange form-lockingly connect and allow rotation about the axis of symmetry. The symmetry axis coincides with single-suction vacuum pumps with the rotor axis. In the case of blocking the rotor, the vacuum pump can rotate about this axis and convert kinetic energy into other forms of energy during the rotation by friction, for example heat. Due to the positive connection, it is held in the axial direction and can not tear away from the Vakuumpumpanordnung. Thus, safety is increased by preventing part tearing and lowering the load on the chamber flange.
Ferner ist es erfindungsgemäß vorgesehen, dass das Halteelement eine Mehrzahl von in Umfangsrichtung zueinander versetzt angeordneten und miteinander zu einem geschlossenen Ring verbundenen Ringsegmenten aufweist. Dies ist eine kostengünstig herzustellende und leicht zu montierenden Anordnung, die die Sicherheit erhöht. Zur erhöhten Sicherheit trägt auch bei, dass die gegenseitige Verbindung der Ringsegmente bewirkt, dass die Drehung der Vakuumpumpe deren einziger freie Freiheitsgrad ist.Furthermore, it is provided according to the invention that the holding element has a plurality of circumferentially offset from each other and connected together to form a closed ring ring segments. This is an inexpensive to manufacture and easy to install arrangement that increases safety. Increased safety also contributes that the mutual connection of the ring segments causes the rotation of the vacuum pump is their only free degree of freedom.
Alle vorgenannten Gestaltungsformen können weitergebildet werden, indem die Festigkeit der Schraube derart bemessen ist, dass die Schraubverbindung bei einer vordefinierten Scherbelastung nachgibt. Diese vordefinierte Scherbelastung ist dabei so bemessen, dass die Schraube nur das für die Vakuumkammer maximal verträgliche Moment auf diese überträgt. Übersteigt das beim Blockieren entstehenden Moment das maximal verträgliche Moment, gibt die Schraube nach. Dadurch wird die Vakuumpumpe eine Bewegung gemäß ihrer Freiheitsgrade ausführen. Der einzige Freiheitsgrad aller Weiterbildungen ist jedoch die Drehung um die Symmetrieachse, so dass ein Abreißen der Vakuumpumpe nicht stattfinden kann und durch die gebremste Drehung kinetische Energie ungefährlich abgebaut wird.All of the aforementioned design forms can be further developed by the strength of the screw is dimensioned such that the screw yields at a predefined shearing load. This predefined shearing load is dimensioned so that the screw transmits only the maximum tolerable for the vacuum chamber moment on this. If the torque created during blocking exceeds the maximum tolerable moment, the screw will yield. This will cause the vacuum pump to move according to its degrees of freedom. However, the only degree of freedom of all developments is the rotation about the axis of symmetry, so that a tearing of the vacuum pump can not take place and kinetic energy is safely degraded by the braked rotation.
Eine andere Weiterbildung schlägt vor, die mit dem Flansch in Kontakt stehende Oberfläche des Halteelements mit einem definierten und konstanten Reibwert zu versehen. Dies erlaubt es, eine Drehung, welche die Oberflächen von Flansch und Halteelement gegeneinander Reiben lässt, in definierter Weise stattfinden zu lassen. Dies ermöglicht insbesondere, bei einer Drehung der Vakuumpumpe notwendige Maßnahmen kostengünstig zu gestalten. Zu diesen Maßnahmen gehören flexible Vorvakuumleitungen und Überlängen der elektrischen Verbindungen.Another development proposes providing the surface of the holding element in contact with the flange with a defined and constant coefficient of friction. This makes it possible to allow a rotation, which rubs the surfaces of flange and retaining element against each other, take place in a defined manner. This makes it possible, in particular, during a rotation of the vacuum pump necessary Make measures cost-effective. These measures include flexible prevacuum lines and excess length of the electrical connections.
Anhand der Figuren soll die Erfindung näher erläutert und die Darstellung der Vorteile vertieft werden. Es zeigen:
- Fig. 1:
- Schnitt durch eine Vakuumpumpanordnung gemäß einer nicht beanspruchten Ausführungsform.
- Fig. 2:
- Schnitt durch die Anordnung entlang der Linie I-I' der
Fig. 1 . - Fig. 3:
- Schnitt durch eine Vakuumpumpanordnung gemäß einer erfindungsgemäßen Ausführungsform.
- Fig. 4:
- Schnitt durch die Anordnung entlang der Linie II-II' der
Fig. 2 . - Fig. 5:
- Schnitt durch die Anordnung entlang der Linie III-III' der
Fig. 3 .
- Fig. 1:
- Section through a vacuum pump assembly according to a not claimed embodiment.
- Fig. 2:
- Section through the arrangement along the line II 'of
Fig. 1 , - 3:
- Section through a vacuum pumping arrangement according to an embodiment of the invention.
- 4:
- Section through the arrangement along the line II-II 'of
Fig. 2 , - Fig. 5:
- Section through the arrangement along the line III-III 'of
Fig. 3 ,
Die Vakuumpumpanordnung gemäß
Zwischen Vakuumpumpe und Vakuumkammer sitzen ein Zentrierring 140 und eine Dichtung 142, die eine genaue Ausrichtung von Vakuumpumpe zu Vakuumkammer und eine vakuumdichte Abdichtung der Anordnung bewirken.Between the vacuum pump and the vacuum chamber, a centering
Die Anordnung weist ein Halteelement 120 auf, welches derart gestaltet ist, dass der Flansch durch Formschluss gegen eine Bewegung senkrecht zur Flanschebene gesichert ist. Diese Gestaltung wird durch einen Ring 122 und ein Stoppelement 124 erreicht. Der Ring umgibt Flansch und Zentrierring und besitzt eine axiale Dicke, die der Summe aus Dicke des Zentrierrings und Dicke des Flansches entspricht. Mit dem Ring ist ein Stoppelement 124 verbunden. Zur besseren Montier- und Demontierbarkeit der Vakuumpumpe ist diese Verbindung im gezeigten Beispiel lösbar durch Stoppelementschrauben 128 erzeugt. Flansch und Stoppelement berühren sich. Die Kontaktfläche 126 ist mit einer Beschichtung versehen, welche einen definierten und konstanten Reibwert aufweist.The arrangement has a holding
In
Eine erfindungsgemäße Ausführungsform ist in den
Die Vakuumkammer 200 besitzt einen rohrförmigen Stutzen mit einem Kammerflansch 201. Zwischen Kammerflansch und Flansch befinden sich ein Zentrierring 240 zum gegenseitigen Ausrichten der Flansche und ein Dichtring 242 zum vakuumdichten Abdichten der Flanschverbindung. Schrauben 210 verbinden die Flansche lösbar miteinander. Beide Flansche sind von den Bauteilen des Halteelements 220 umgeben, welches derart gestaltet ist, dass der Flansch durch Formschluss gegen eine Bewegung senkrecht zur Flanschebene gesichert ist. Das Halteelement umfasst die Ringsegmente 222a, 222c, 224a und 224c. Der Formschluss wird erreicht, indem ein Teil der Ringsegmente 222a und 222c mit dem Kammerflansch und ein anderer Teil der Ringsegmente 224a und 224c mit dem Flansch in berührendem Kontakt stehen. Die Ringsegmente greifen formschlüssig ineinander und sind miteinander verbunden. Zum Herstellen der Verbindung weist ein Teil der Ringsegmente Gewindeabschnitte 228 auf, die durch Bohrungen im anderen Teil der Ringsegmente gesteckt werden. Die Verbindung wird durch mit den Gewindeabschnitten in Eingriff stehenden Muttern 229 gesichert.The
Claims (3)
- An arrangement having a vacuum chamber (200) and a vacuum pump (202) which has a housing (204), a fast-rotating rotor (206) arranged therein and a flange (208) connected to the housing (204); and having a screw (210) for connecting the flange (208) to the vacuum chamber which has a chamber flange (201), wherein the arrangement has a holding element (220) which has a plurality of ring segments (222a, 222b, 222c, 222d, 224a, 224b, 224c, 224d) connected to one another to form a closed ring and which is configured such that it connects the flange (208) and the chamber flange (201) in a form fitted manner, allows a rotation about the symmetry axis and the flange (208) is secured by a form fit against a movement perpendicular to the flange plane,
characterized in that
a first share of the ring segments (222a, 222b, 222c, 222d) is in touching contact with the chamber flange (201) and a second share of the ring segments (224a, 224b, 224c, 224d) is in touching contact with the flange (208), with the ring segments (222a, 222b, 222c, 222d) of the first share being arranged offset from the ring segments (224a, 224b, 224c, 224d) of the second share in the peripheral direction such that each ring segment (222a, 222b, 222c, 222d) of the first share is connected to two of the ring segments (224a, 224b, 224c, 224d) of the second share and each ring segment (224a, 224b, 224c, 224d) of the second share is connected to two of the ring segments (222a, 222b, 222c, 222d) of the first share. - An arrangement in accordance with claim 1, characterized in that the strength of the screw (210) is dimensioned such that, with a shear load above the maximum tolerable load for the vacuum chamber, the screw connection gives way by a shearing off of the screw (210).
- An arrangement in accordance with claim 1 or claim 2, characterized in that the surface (226) of the holding element (220) in contact with the flange (208) has a defined and constant friction value.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008035972A DE102008035972A1 (en) | 2008-07-31 | 2008-07-31 | Vacuum pumping arrangement |
Publications (3)
Publication Number | Publication Date |
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EP2149710A2 EP2149710A2 (en) | 2010-02-03 |
EP2149710A3 EP2149710A3 (en) | 2017-03-15 |
EP2149710B1 true EP2149710B1 (en) | 2019-01-16 |
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Application Number | Title | Priority Date | Filing Date |
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EP09008725.5A Not-in-force EP2149710B1 (en) | 2008-07-31 | 2009-07-03 | Vacuum pump arrangement |
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EP (1) | EP2149710B1 (en) |
DE (1) | DE102008035972A1 (en) |
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DE102014104161A1 (en) * | 2014-03-26 | 2015-10-01 | Pfeiffer Vacuum Gmbh | Roots |
JP2021514492A (en) | 2018-02-09 | 2021-06-10 | ニーサー,ポール | Filtration equipment and methods |
US11260330B2 (en) | 2018-02-09 | 2022-03-01 | Paul NEISER | Filtration apparatus and method |
CN112041724A (en) | 2018-02-15 | 2020-12-04 | P·奈瑟 | Apparatus and method for selectively transmitting an object |
CN111868378A (en) * | 2018-02-23 | 2020-10-30 | P·奈瑟 | Interaction method and apparatus |
EP3617523A1 (en) * | 2019-02-12 | 2020-03-04 | Pfeiffer Vacuum Gmbh | Vacuum device and vacuum system |
GB2607605B (en) * | 2021-06-08 | 2023-07-05 | Leybold Gmbh | Apparatus and vacuum system |
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US6485254B1 (en) * | 2000-10-19 | 2002-11-26 | Applied Materials, Inc. | Energy dissipating coupling |
JP2002327698A (en) * | 2001-04-27 | 2002-11-15 | Boc Edwards Technologies Ltd | Vacuum pump |
JP2003336597A (en) * | 2002-03-12 | 2003-11-28 | Boc Edwards Technologies Ltd | Turbo molecular pump |
JP4484470B2 (en) * | 2002-10-23 | 2010-06-16 | エドワーズ株式会社 | Molecular pump and flange |
US20050029417A1 (en) * | 2003-08-08 | 2005-02-10 | Richard Scheps | Mounting bracket for a rotary pump |
DE102006058672B4 (en) * | 2006-12-13 | 2016-09-15 | Pfeiffer Vacuum Gmbh | Arrangement with vacuum pump |
-
2008
- 2008-07-31 DE DE102008035972A patent/DE102008035972A1/en not_active Ceased
-
2009
- 2009-07-03 EP EP09008725.5A patent/EP2149710B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
EP2149710A2 (en) | 2010-02-03 |
EP2149710A3 (en) | 2017-03-15 |
DE102008035972A1 (en) | 2010-02-04 |
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