EP0237618B1 - Drehschieber-Vakuumpumpe - Google Patents

Drehschieber-Vakuumpumpe Download PDF

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Publication number
EP0237618B1
EP0237618B1 EP19860113768 EP86113768A EP0237618B1 EP 0237618 B1 EP0237618 B1 EP 0237618B1 EP 19860113768 EP19860113768 EP 19860113768 EP 86113768 A EP86113768 A EP 86113768A EP 0237618 B1 EP0237618 B1 EP 0237618B1
Authority
EP
European Patent Office
Prior art keywords
pump
stage
carrying plate
pump stage
stages
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.)
Expired
Application number
EP19860113768
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0237618A3 (en
EP0237618A2 (de
Inventor
Markus Rüscher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr-Ing K Busch GmbH
Original Assignee
Dr-Ing K Busch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dr-Ing K Busch GmbH filed Critical Dr-Ing K Busch GmbH
Publication of EP0237618A2 publication Critical patent/EP0237618A2/de
Publication of EP0237618A3 publication Critical patent/EP0237618A3/de
Application granted granted Critical
Publication of EP0237618B1 publication Critical patent/EP0237618B1/de
Expired legal-status Critical Current

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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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle

Definitions

  • the invention relates to a rotary vane vacuum pump with at least two pump stages arranged horizontally one above the other with their shafts, each of which has a housing in which an eccentrically arranged rotor with slide plates movable in radial slots can be rotated in such a way that a pumping action occurs due to changing chamber volumes, whereby the inlet of the second stage is connected to the outlet of the first stage and the pump stages are detachably attached to a support part independently of one another.
  • Multi-stage rotary vane pumps are e.g. used in the chemical and pharmaceutical industries for various purposes. They are often exposed to aggressive and corrosive media, which can affect the pump performance over a long period of operation. For example, reactions of the media, gases and vapors to be pumped with the lubricants of the pump stages, polymerizations and erosions due to aggressive condensates can impair the function of the pump after a relatively short time to such an extent that extensive maintenance work or a replacement is necessary. Because of the high value of such a pump, however, its replacement is particularly ruled out after a short operating time. The faulty machine must therefore be serviced and repaired. Since such pumps are often used to maintain very complex and expensive chemical processes, the prolonged interruption of which can cause high costs or losses, it is necessary to carry out the maintenance and repairs directly on the pump itself in the shortest possible time.
  • the high pressure stage is particularly at risk because both condensation and polymerization can occur faster and more easily and can impair the pump function.
  • the two pump stages are connected to a carrier housing within a common water jacket in such a way that all functions such as gas routing, lubrication and drive are fulfilled.
  • this results in an unfavorable long and angled gas flow both in the carrier housing and in the pump stages, which promotes the formation of condensate.
  • both pump stages are located in the water space of a common cooling jacket, they are subject to attack by the water, which is why rust and lime deposits can occur both on the stages and on the connecting elements to the carrier housing.
  • Adhesive rust and lime sludge can make maintenance work and disassembly of a pump stage difficult.
  • the large sealing surfaces required on the cooling jacket can promote leakage losses.
  • the large cooling jacket also only withstands water and explosion pressures to a very limited extent.
  • the invention has for its object to provide a rotary vane pump of the type mentioned, in which the exchange of the individual pump stages is easier and more flexible, but only short gas paths are required between the pump stages.
  • the supporting part is designed as a supporting plate, on the two sides of which at least one pump stage is fastened.
  • each pump stage can be dismantled very easily and quickly, without the other pump stage having to be affected in any way in its holder or position.
  • the pump stages are practically immediately adjacent to one another, so that the shortest gas paths are possible.
  • the support plate is arranged approximately horizontally and one pump stage on the top and the other pump stage on the underside of the support plate are detachably attached.
  • one pump stage can stand on the support plate while the other hangs under this support plate, so that they are both carried by this common support plate, but are not dependent on one another during assembly or disassembly.
  • An embodiment of the invention of very considerable importance which ensures the shortest possible gas path, can consist in that the support plate has an opening for the connection of the outlet of the first pump stage to the inlet of the second pump stage.
  • the two pump stages are arranged directly one above the other and one stage above and the other below the support plate, so that a simple vertical breakthrough through the support plate for the desired connection of the outlet of the first pump stage to the inlet the second pump stage.
  • the support plate can also have at least one opening for connecting the coolant paths of the pump stages and can serve as a connection of the coolant path from one pump stage to the other.
  • the cooling liquid can thus enter a pump stage, exit in the region of the support plate and enter the second pump stage through the support plate, in order then to be returned to the cooler at the exit of this second pump stage.
  • a further embodiment of the invention of considerable importance can consist in that the support plate contains perforations or channels for the lubricating oil distribution and lubricating oil connection of the pump stages.
  • the lubricating oil can also get from the one pump stage to the other by the shortest route through the support plate.
  • a further embodiment of the invention of considerable importance which above all greatly facilitates and favors the replacement of the pump stage located under the support plate, can consist in that the support plate or intermediate plate is mounted at a distance from a base frame of the pump unit, one of the pump stages in this Distance between the underside of the support plate and the top of the base frame is arranged and after detaching from the support plate on the base plate under the upper pump stage can be moved out.
  • This is achieved in a simple manner by the arrangement mentioned, which first allows the lower pump stage to be pushed out of the region of the upper pump stage, so that a hoist can then easily attack this shifted pump stage without being impaired by the upper pump stage.
  • This disassemblability in particular of the lower pump stage by a first shifting out from under the support plate, can be favored by the fact that sliding elements or rollers are arranged on the bottom of the lower pump stage which move the pump stage relative to the base frame and a guide preferably arranged there or the like. facilitate.
  • rolling elements that are only to be used temporarily to facilitate the displacement between the pump stage detached from the support plate and the base frame.
  • the sliding elements or rollers of the lower pump stage can have an approximately the tightening path of fasteners, e.g. B. the screw-in depth of retaining screws, for the pump stage on the support plate corresponding or smaller distance. If the fastening elements of the lower pump stage on the support plate are loosened, this is lowered in accordance with the tightening path of these fastening elements until the sliding elements or rollers reach the lower guide on the base frame. Then the fasteners can be completely loosened and then the pump stage can be moved. This means that the pump stage can be lowered from the support plate to the guide very easily and without additional aids. If aids for moving the pump stage are to be inserted between the pump stage to be lowered and the top of the base frame, the lowering to such an aid can in turn be carried out in a simple manner by loosening the fastening elements.
  • fasteners e.g. B. the screw-in depth of retaining screws
  • Embodiments of the invention with regard to the mounting of the support plate itself on the base frame and with regard to the configuration of the displacement path of the lower pump stage on the base frame and with regard to the fastening, positioning and sealing of the individual pump stages and also the arrangement of drive, lubrication lines, etc., in each case also in relation to the support plate are the subject of claims 7 and 10 to 24.
  • a rotary vane pump generally designated 1, in particular rotary vane vacuum pump, has two pump stages 3 and 4 arranged horizontally one above the other with their shafts 2, each of which has its own, in the exemplary embodiment, liquid-cooled housing.
  • an eccentrically arranged rotor with Schteber plates movable in radial slots is rotatable in such a way that a pumping effect is created by changing chamber volumes, the inlet of the second stage 4, not shown in more detail, on its top with that on the bottom of the first Stage 3 located outlet is connected and the pump stages 3 and 4 can be individually dismantled in a manner to be described.
  • a support plate 5 can be seen in all the figures, on the two sides of which one of the pump stages is detachably fastened independently of the other. This can be seen particularly clearly from FIG. 2, according to which the support plate 5 is arranged approximately horizontally and the pump stage 3 is detachably attached to the top, while the other pump stage 4, which is detachably attached to the underside of the support plate 5 according to FIG. 1 is in the release position or before fastening.
  • the housings of pump stages 3 and 4 have liquid cooling in the exemplary embodiment.
  • the support plate 5 according to FIG. 5 has an opening 7 for connecting the coolant paths of the pump stages 3 and 4, so that the support plate 5 also acts as a connection of the coolant path from one to the other pump stage serves as it does for the medium to be pumped.
  • the support plate 5 contains perforations 8 and channels 9 for the lubricating oil distribution and lubricating oil connection of the pump stages 3 and 4.
  • the pump shafts 2 - in the exemplary embodiment of the upper pump stage 3 - driven oil pump 10 is provided, which, for. B. can be releasably connected to the end of this pump shaft 2 via a quickly detachable adapter flange and claw or pin coupling in order to enable replacement of this upper pump stage 3 and still allow the oil pump 10 to be used further.
  • the lubricating oil lines 11 emanating from the oil pump 10 lead to the support plate 5, which can be seen above all in FIG. 4.
  • the lubricating oil lines 11 which can be seen on the left in FIG. 5 can be returned through a horizontal hollow channel 12 located approximately in the middle of the support plate 5 to the same side on which the other lines 11 are also connected, so that all connections and lines are largely from one side are accessible from here.
  • the support plate 5 is mounted at a distance from a base frame 13 of the pump unit 1, the pump stage 4 is arranged at this distance between the underside of the support plate 5 and the top of the base frame 13 in the use position and after detaching from the support plate 5 on the base plate 13 under the upper pump stage 3 in the position shown in Fig. 2 can be moved out.
  • the support plate 5 is mounted on a bridge structure 14 mounted on the base frame 13, wherein it is cantilevered in the direction of displacement of the lower pump stage 4.
  • the displacement of the lower pump stage 4 is not affected by the mounting of the support plate 5.
  • rollers 15 At the bottom of the lower pump stage 4 can be seen in Fig. 1 and 3 rollers 15, but also as Sliding elements could be formed and which facilitate the displacement of the pump stage 4 relative to the base frame 13 and a guide 16 arranged there in the exemplary embodiment.
  • the guide 16 is formed by two parallel bars 17, on the top of which the rollers 15 can run.
  • Fig. 3 it can also be seen that the lower pump stage 4 extending along its displacement path during assembly or disassembly of guide projections 19, guide jaws or the like. has, which center this lower pump stage 4 to the central axis of the intermediate or support plate 5 or keep it centered.
  • these guide projections 19 overlap the outer side surfaces of the spars 17.
  • such guide projections 19 could also be provided on the inner side surfaces.
  • a laterally protruding guide projection or a guide bar 19 could be provided on the spars 17, relative to which the pump stage 4 would be displaceable laterally.
  • the embodiment shown is structurally particularly simple, in which the lateral guides 19 of the lower pump stage 4 laterally overlap the guideway 16 for their rollers 15.
  • Coolant and / or lubricating oil paths can be arranged to further facilitate and accelerate the assembly of a new pump stage 4.
  • the lower pump stage 4 or at least two fastening devices or elements, in particular quick-release fasteners, the holding screws 18 or the like already mentioned. can be attached to the support plate 5 and seals 20, for example O-rings or the like. are arranged at least in the region of the channel openings 6, 7, 8 and 9.
  • these seals 20, of which only those which are indicated in the area of the lubricating oil path in FIG. 4 as an example, can then also fulfill their function.
  • a complicated, area-wide seal comparable to a cylinder head gasket on the support plate 5 or even on both sides of the support plate 5 can be very easily avoided in this way. It can be seen in Fig. 4 that corresponding recesses en are provided for their position stabilization and fixation for these sealing rings.
  • the upper pump stage 3 can with at least two fasteners, for. B. also two screws 18 or at least one screw and an index bolt, quick fasteners or the like. be fixed, because the upper pump stage can be easily gripped with a hoist after opening the fastening device and lifted up. Also between its underside and the top of the support plate 5 are z. B. O-rings or the like. Seals arranged. While the indentations for the seals are provided on the lower stage itself, they are arranged on the top of the support plate in the support plate, so that the sealing rings 20 are held in the vertical direction by gravity.
  • a common drive motor 21 is provided for both pump stages 3 and 4, which is mounted on a height-adjustable bridge 22 on the base frame 13 and can be adjusted and fixed with its output shaft 23 in alignment with the drive shaft 2 of the lower pump stage 4.
  • the coupling between the lower pump stage 4 and the drive motor 21 is an axially releasable claw coupling 24, which facilitates the simple and rapid axial displacement of the pump stage 4 away from or towards the motor and the necessary disengagement or engagement.
  • the two pump stages 3 and 4 are connected via a V-belt 25 on the side facing away from the drive motor 21.
  • a chain drive or a gear drive would also be conceivable.
  • a V-belt drive is particularly simple and has the additional advantage that a tensioning device 26 for the drive belt 25 can be attached in a resilient and self-adjusting manner on the support plate 5 above its horizontal extension, as can be seen clearly from FIGS. 1 and 3.
  • the support plate 5 also has an additional function in connection with the drive transmission from the lower to the upper pump stage.
  • the support plate 5 can be a cast part and at least the larger openings 6 and 7 can be pre-cast.
  • the breakthroughs which are advantageous for the short paths of the medium guidance can thus be left out during the manufacture of the support plate, so that an additional effort for attaching these breakthroughs can be avoided.
  • the bridge structure 14 holding the support plate 5 can also be a casting with lateral openings 27 in its connecting parts between the base plate 13 and the support plate 5, the lateral openings 27 being located at the level of the coupling 24 between the motor 21 and the lower pump stage 4 and preferably by means of grids or the like. Protection against accidental contact can be closed. Through this opening 27, the opening or closing of the clutch 24 is thus possible quickly and easily.
  • the support plate 5 and the bridge 14 can be screwed together or, in particular, can also be connected in one piece in the case of production as castings.
  • this additional part which has the aforementioned considerable advantages for the entire pump unit 1, is very simple and inexpensive.
  • the pump stage 3 located on the upper side of the support plate 5 is the low-pressure stage and thus the pump stage 4 located on the underside of the support plate 5 is the high-pressure stage, which has to be replaced more often due to the higher load.
  • the larger and thus heavier low-pressure stage 3 can advantageously be gripped and lifted directly from the top of the support plate 5 with the aid of a lifting device.
  • the smaller and therefore also easier to move high-pressure stage 4 is expediently provided on the underside of the support plate 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP19860113768 1985-12-23 1986-10-04 Drehschieber-Vakuumpumpe Expired EP0237618B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853545982 DE3545982A1 (de) 1985-12-23 1985-12-23 Drehschieber-vakuumpumpe
DE3545982 1985-12-23

Publications (3)

Publication Number Publication Date
EP0237618A2 EP0237618A2 (de) 1987-09-23
EP0237618A3 EP0237618A3 (en) 1988-01-07
EP0237618B1 true EP0237618B1 (de) 1989-05-31

Family

ID=6289501

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860113768 Expired EP0237618B1 (de) 1985-12-23 1986-10-04 Drehschieber-Vakuumpumpe

Country Status (2)

Country Link
EP (1) EP0237618B1 (cg-RX-API-DMAC7.html)
DE (2) DE3545982A1 (cg-RX-API-DMAC7.html)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8807065U1 (de) * 1988-05-30 1989-09-28 Siemens AG, 1000 Berlin und 8000 München Auf einem transportablen Traggestell angeordnetes Vakuumpumpenaggregat
DE58901145D1 (de) 1988-06-24 1992-05-21 Siemens Ag Mehrstufiges vakuumpumpenaggregat.
GB2394011A (en) * 2002-10-10 2004-04-14 Compair Uk Ltd Oil sealed rotary vane compressor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT158310B (de) * 1937-01-27 1940-03-26 Schweizerische Lokomotiv Zwei- oder mehrzylindriger Drehkolbenverdichter.
CH192649A (de) * 1937-03-11 1937-08-31 Graber & Wening Mehrstufiger Rotationskompressor.
AT159765B (de) * 1938-05-14 1940-11-11 Klein Schanzlin & Becker Ag Zweistufige Drehkolbenvakuumpumpe mit sichelförmigen Arbeitsräumen und radial oder annähernd radial verschiebbaren Arbeitsschiebern.
US2780406A (en) * 1953-04-21 1957-02-05 Worthington Corp Rotary compressor
US2961151A (en) * 1955-08-12 1960-11-22 Westinghouse Air Brake Co Rotary compressor
DE1848304U (de) * 1962-01-18 1962-03-15 Karl Dr Ing Busch Zweistufige rotations-verdichter und -vakuumpumpe.
US4588358A (en) * 1984-07-02 1986-05-13 Werner Rietschle Maschinen-Und Apparatebau Gmbh Rotary vane evacuating pump

Also Published As

Publication number Publication date
EP0237618A3 (en) 1988-01-07
DE3663721D1 (en) 1989-07-06
DE3545982A1 (de) 1987-07-02
EP0237618A2 (de) 1987-09-23
DE3545982C2 (cg-RX-API-DMAC7.html) 1988-12-01

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