EP0129066A2 - Stepped discs pump - Google Patents
Stepped discs pump Download PDFInfo
- Publication number
- EP0129066A2 EP0129066A2 EP84105616A EP84105616A EP0129066A2 EP 0129066 A2 EP0129066 A2 EP 0129066A2 EP 84105616 A EP84105616 A EP 84105616A EP 84105616 A EP84105616 A EP 84105616A EP 0129066 A2 EP0129066 A2 EP 0129066A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- angle
- rotation
- stepped
- rotors
- disks
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 206010038743 Restlessness Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 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
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
Definitions
- the invention relates to a stepped disk pump with at least two mutually engaging rotors rotating at the same speed, which are constructed from stepped disks lined up on a shaft, each with only one engagement segment, with adjacent stepped disks being rotated relative to one another by a certain angle, and which are designed and arranged in this way are that they form closed delivery chambers together with the housing.
- Such disc pumps are known, for. B. FR-PS 694 484, OE-PS 261 792 and DE-PS 917 230.
- the invention has for its object to improve a generic stage disc pump in such a way that periodic pressure fluctuations or compression within the chambers due to changing number of constrictions and unsuitable angles of rotation are largely avoided when rotating the rotors in order to achieve a smoother running of the rotors . It must therefore be attempted to take measures so that the number of constrictions remains constant when the stepped disks engage and that the angle of rotation of the stepped disks relative to one another is selected such that chamber courses occur over the conveying path, which avoid compression of the conveying medium. The latter is particularly important for liquid media.
- the angle of rotation ⁇ is equal to the angle ⁇ which results from the connection of the enveloping circle intersections of the rotors with their centers and that the angle of rotation ⁇ is equal to 360 ° and n is an integer greater than three.
- chambers are formed that are delimited from the outside by the pump housing.
- the chambers are generally connected to one another in the course of a screw spiral.
- the cross section of the chambers can remain unchanged, but it can also change within a division predetermined by the angle of rotation.
- the twist angle ⁇ should be according to an advantageous embodiment of the stepped disk pump according to the invention with n as an integer odd number from 5 to 15.
- Thin spacers may be located between the step disks lined up on a rotor. The rotors can then be turned more smoothly.
- the stepped washers can be made of any material, in particular steel, hard metal or ceramic.
- each rotor 2, 3 has a shaft 4, on which stepped disks 5 are lined up in the axial direction. Adjacent step disks 5 of a rotor 2 or 3 are rotated relative to one another by the angle of rotation ⁇ .
- the angle of rotation ⁇ is equal to the angle ⁇ which results from the connection of the enveloping circle intersection points 5 1 , 5 2 of the rotors 2, 3 with their centers M 1 , M 2 .
- each stepped disk 5 has an annular central section 5a and an engagement segment 5b, which in the exemplary embodiment extends over a circumferential angle of 180 °.
- the engagement segment 5b is delimited by concave epicycloid sections 5c.
- the backs of the engagement segments 5b of the step washers 5 are hatched.
- a larger seal is used for the overlap shown in FIG possible.
- sealing step washers 5 are also possible with an engagement segment 5b which has a circumferential angle of at least 180 ° - ⁇ .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Die Erfindung betrifft eine Stufenscheibenpumpe mit mindestens zwei miteinander in Eingriff stehenden gegenläufig gleich schnell drehenden Rotoren, die augebaut sind aus auf einer Welle aufgereihten Stufenscheiben mit jeweils nur einem Eingriffssegment, wobei jeweils benachbarte Stufenscheiben um einen bestimmten Winkel gegeneinander verdreht sind und die so ausgebildet und angeordnet sind, daß sie zusammen mit dem Gehäuse abgeschlossene Förderkammern bilden. Kennzeichen der Erfindung ist, daß der Verdrehwinkel α gleich dem Winkel β ist, der sich aus der Verbindung der Hüllkreisschnittpunkte (51, 52) der Rotoren (2, 3) mit deren Mittelpunkten (M1, M2) ergibt und daß der Verdrehwinkel α gleich 360°/n is mit n als ganzzahliger Zahl größer 3.The invention relates to a stepped disk pump with at least two mutually engaging rotors rotating at the same speed, which are constructed from stepped disks lined up on a shaft, each with only one engagement segment, with adjacent stepped disks being rotated relative to one another by a certain angle, and which are designed and arranged in this way are that they form closed delivery chambers together with the housing. The characteristic of the invention is that the angle of rotation α is equal to the angle β which results from the connection of the enveloping circle intersections (51, 52) of the rotors (2, 3) with their centers (M1, M2) and that the angle of rotation α is equal to 360 ° / n is greater than 3 with n as an integer.
Description
Die Erfindung betrifft eine Stufenscheibenpumpe mit mindestens zwei miteinander in Eingriff stehenden gegenläufig gleich schnell drehenden Rotoren, die aufgebaut sind aus auf einer Welle aufgereihten Stufenscheiben mit jeweils nur einem Eingriffssegment, wobei jeweils benachbarte Stufenscheiben um einen bestimmten Winkel gegeneinander verdreht sind und die so ausgebildet und angeordnet sind, daß sie zusammen mit dem Gehäuse abgeschlossene Förderkammern bilden.The invention relates to a stepped disk pump with at least two mutually engaging rotors rotating at the same speed, which are constructed from stepped disks lined up on a shaft, each with only one engagement segment, with adjacent stepped disks being rotated relative to one another by a certain angle, and which are designed and arranged in this way are that they form closed delivery chambers together with the housing.
Derartige Stufenscheibenpumpen sind bekannt, z. B. FR-PS 694 484, OE-PS 261 792 und DE-PS 917 230.Such disc pumps are known, for. B. FR-PS 694 484, OE-PS 261 792 and DE-PS 917 230.
Beim Betrieb derartiger Stufenscheibenpumpen können periodisch Druckschwankungen dadurch entstehen, daß das Fördermedium eine wechselnde Anzahl von Engstellen auf dem Förderweg passieren muß. Außerdem können bei Betrieb derartiger Stufenscheibenpumpen abhängig vom Verdrehwinkel der Scheiben gegeneinander Kammerverläufe über den Förderweg entstehen, die eine Kompression des Fördermediums zur Folge haben.When such stepped disk pumps are operated, pressure fluctuations can occur periodically due to the fact that the pumped medium has to pass a changing number of constrictions on the conveying path. In addition, depending on the angle of rotation of the disks relative to one another, chamber profiles can arise over the conveying path during operation of such stepped disk pumps, which result in compression of the conveying medium.
Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Stufenscheibenpumpe dahingehend zu verbessern, daß beim Drehen der Rotoren periodische Druckschwankungen bzw. Kompression innerhalb der Kammern, bedingt durch wechselnde Anzahl der Engstellen und ungeeignete Verdrehwinkel, weitgehend vermieden werden um somit einen ruhigeren Lauf der Rotoren zu erreichen. Es muß also versucht werden Maßnahmen zu ergreifen, daß die Anzahl der Engstellen beim Eingriff der Stufenscheiben konstant bleibt und daß der Verdrehwinkel der Stufenscheiben gegeneinander so gewählt wird, daß Kammerverläufe über den Förderweg entstehen, die eine Kompression des Fördermediums vermeiden. Letzteres ist insbesondere bei flüssigen Medien von großer Wichtigkeit.The invention has for its object to improve a generic stage disc pump in such a way that periodic pressure fluctuations or compression within the chambers due to changing number of constrictions and unsuitable angles of rotation are largely avoided when rotating the rotors in order to achieve a smoother running of the rotors . It must therefore be attempted to take measures so that the number of constrictions remains constant when the stepped disks engage and that the angle of rotation of the stepped disks relative to one another is selected such that chamber courses occur over the conveying path, which avoid compression of the conveying medium. The latter is particularly important for liquid media.
Zur Lösung dieser Aufgabe wird bei einer Stufenscheibenpumpe der eingangs genannten Gattung gemäß der Erfindung vorgeschlagen, daß der Verdrehwinkel α gleich dem Winkel ß ist, der sich aus der Verbindung der Hüllkreisschnittpunkte der Rotoren mit deren Mittelpunkten ergibt und daß der Verdrehwinkei α gleich 360° ist und n eine n ganze Zahl größer drei ist.To solve this problem, it is proposed in a stepped disk pump of the type mentioned according to the invention that the angle of rotation α is equal to the angle β which results from the connection of the enveloping circle intersections of the rotors with their centers and that the angle of rotation α is equal to 360 ° and n is an integer greater than three.
Durch das Aneinanderreihen der Stufenscheiben auf einer Welle werden Kammern gebildet, die vom Pumpengehäuse nach außen begrenzt werden. Die Kammern sind im großen und ganzen im Verlauf einer Schraubenwendel miteinander verbunden. Der Querschnitt der Kammern kann dabei unverändert bleiben, er kann sich aber innerhalb einer durch den Verdrehwinkel vorgegebenen Teilung auch ändern.By lining up the stepped disks on a shaft, chambers are formed that are delimited from the outside by the pump housing. The chambers are generally connected to one another in the course of a screw spiral. The cross section of the chambers can remain unchanged, but it can also change within a division predetermined by the angle of rotation.
Der erste Fall tritt ein, wenn der Verdrehwinkel α ganzzahlig gerade in 360° enthalten ist, z. B. wenn α = 60" ist. Wenn der Verdrehwinkel α ganzzahlig ungerade in 360° enthalten ist, z.B. α = 72°, so kann der zweite Fall auftreten, nämlich ein Kammerverlauf mit sich änderndem Querschnitt.The first case occurs when the twist angle α is contained in 360 °, z. B. if α = 60 ". If the angle of rotation α is an integer is contained oddly in 360 °, for example α = 72 °, the second case can occur, namely a chamber profile with a changing cross section.
In beiden erwähnten Fällen kann es zu einem unruhigen Lauf kommen, denn im ersten Fall sind eine wechselnde Anzahl von Engstellen im Kammerverlauf möglich und im letzteren Fall auch Querschnittsänderungen, die zu Kompression bzw. Druckschwankungen führen können.In both of the above-mentioned cases, there can be a restless run, because in the first case a varying number of constrictions in the course of the chamber are possible, and in the latter case also cross-sectional changes that can lead to compression or pressure fluctuations.
In beiden Fällen führt die Einhaltung der erfindungsgemäßen Vorschrift, α = β und α =
Wenn die Stufenscheiben beider Rotoren gleiche Querschnitte besitzen, ergibt sich ein fertigungstechnischer Vorteil.If the stepped disks of both rotors have the same cross-sections, there is a manufacturing advantage.
Wenn das Eingriffssegment in bekannter Weise begrenzt ist von konkaven Epizykloidenabschnitten, so ergibt sich beim Zusammenwirken gegenüberliegender Stufenscheiben auf den beiden Rotoren ein ständiger Kontakt an den Stufenübergängen mit der Folge einer guten Abdichtung und Verhindern des Rückströmens von Material.If the engagement segment is delimited in a known manner by concave epicycloid sections, the interaction of opposing stepped disks on the two rotors results in constant contact at the stepped transitions, with the result of good sealing and preventing backflow of material.
Um den Verschleiß an den äußeren Ecken des Eingriffssegments zu vermeiden, können diese gerundet sein. Zwischen den auf einem Rotor aufgereihten Stufenscheiben können sich dünne Distanzscheiben befinden. Die Rotoren können dann leichtgängiger gedreht werden.To avoid wear on the outer corners of the engagement segment, these can be rounded. Thin spacers may be located between the step disks lined up on a rotor. The rotors can then be turned more smoothly.
Die Stufenscheiben können an sich aus beliebigem Material bestehen, insbesondere Stahl, Hartmetall oder Keramik.The stepped washers can be made of any material, in particular steel, hard metal or ceramic.
Anhand der Zeichnung wird die Erfindung näher erläutert.The invention is explained in more detail with reference to the drawing.
Es zeigen:
- Fig. 1 den Querschnitt durch das Pumpengehäuse und die darin angeordneten beiden gegenläufigen Rotoren,
- Fig. 2 eine Stufenscheibe in Ansicht,
- Fig. 3 die Abwicklung eines Rotorabschnitts mit α = 60° und
- Fig. 4 die Abwicklung eines Abschnitts des Rotors mit n = 5.
- 1 shows the cross section through the pump housing and the two counter-rotating rotors arranged therein,
- 2 is a step disc in view,
- Fig. 3 shows the development of a rotor section with α = 60 ° and
- 4 shows the development of a section of the rotor with n = 5.
In dem Pumpengehäuse 1 sind zwei Rotoren 2, 3 übereinander angeordnet, die unter dem Winkel β miteinander in Eingriff stehen. Jeder Rotor 2, 3 besitzt eine Welle 4, auf die in axialer Richtung Stufenscheiben 5 aufgereiht sind. Benachbarte Stufenscheiben 5 eines Rotors 2 bzw. 3 sind um den Verdrehwinkel α gegeneinander verdreht. Gemäß der Erfindung ist der Verdrehwinkel α gleich dem Winkel β, der sich aus der Verbindung der Hüllkreisschnittpunke 51, 52 der Rotoren 2, 3 mit deren Mittelpunkten M1, M2 ergibt.In the
Wie aus Fig. 2 ersichtlich ist, besitzt jede Stufenscheibe 5 einen kreisringförmigen Mittelabschnitt 5a und ein Eingriffssegment 5b, das sich im Ausführungsbeispiel über einen Umfangswinkel von 180° erstreckt. In Umfangsrichtung wird das Eingriffssegment 5b begrenzt durch konkave Epizykloidenabschnitte 5c.As can be seen from FIG. 2, each
Fig. 3 zeigt ein Ausführungsbeispiel mit abschnittsweiser Abwicklung des Rotorumfangs für den Verdrehwinkel α = 60°. Die Rücken der Eingriffssegmente 5b der Stufenscheiben 5 sind schraffiert.Fig. 3 shows an embodiment with section-wise development of the rotor circumference for the angle of rotation α = 60 °. The backs of the
Eine größere Abdichtung wird bei der in Fig. 4 gezeigten Überlappung um
Claims (2)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3318859 | 1983-05-25 | ||
DE3318859 | 1983-05-25 | ||
DE3323327 | 1983-06-29 | ||
DE3323327A DE3323327C1 (en) | 1983-05-25 | 1983-06-29 | Stage disc pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0129066A2 true EP0129066A2 (en) | 1984-12-27 |
EP0129066A3 EP0129066A3 (en) | 1985-04-10 |
Family
ID=25811009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84105616A Withdrawn EP0129066A3 (en) | 1983-05-25 | 1984-05-17 | Stepped discs pump |
Country Status (4)
Country | Link |
---|---|
US (1) | US4543048A (en) |
EP (1) | EP0129066A3 (en) |
AU (1) | AU2852584A (en) |
DE (1) | DE3323327C1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4761125A (en) * | 1986-03-29 | 1988-08-02 | Nippon Soken, Inc. | Twin-shaft multi-lobed type hydraulic device |
JP2904719B2 (en) * | 1995-04-05 | 1999-06-14 | 株式会社荏原製作所 | Screw rotor, method for determining cross-sectional shape of tooth profile perpendicular to axis, and screw machine |
RS50951B (en) * | 2001-02-23 | 2010-08-31 | Ateliers Busch Sa. | Rotary piston machine for compressible media |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR694484A (en) * | 1929-08-03 | 1930-12-04 | Further development of rotary impeller pumps | |
DE917230C (en) * | 1951-02-10 | 1954-08-30 | Eugen Hack | Capsule plant for the conveyance of liquids, plastic masses etc. like |
AT261792B (en) * | 1965-06-15 | 1968-05-10 | Paul Wormser & Co | Rotary piston machine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB200547A (en) * | 1922-03-11 | 1923-07-11 | Serge Leliavsky | Improvements in rotary pumps and engines |
GB705774A (en) * | 1951-02-09 | 1954-03-17 | Eugen Haok | Rotary pump adapted for use as a pump or motor for the delivery of liquids, plastic masses and the like |
US3941521A (en) * | 1974-08-28 | 1976-03-02 | Calspan Corporation | Rotary compressor |
-
1983
- 1983-06-29 DE DE3323327A patent/DE3323327C1/en not_active Expired
-
1984
- 1984-05-17 EP EP84105616A patent/EP0129066A3/en not_active Withdrawn
- 1984-05-23 AU AU28525/84A patent/AU2852584A/en not_active Abandoned
- 1984-05-23 US US06/612,982 patent/US4543048A/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR694484A (en) * | 1929-08-03 | 1930-12-04 | Further development of rotary impeller pumps | |
DE917230C (en) * | 1951-02-10 | 1954-08-30 | Eugen Hack | Capsule plant for the conveyance of liquids, plastic masses etc. like |
AT261792B (en) * | 1965-06-15 | 1968-05-10 | Paul Wormser & Co | Rotary piston machine |
Also Published As
Publication number | Publication date |
---|---|
EP0129066A3 (en) | 1985-04-10 |
AU2852584A (en) | 1984-11-29 |
US4543048A (en) | 1985-09-24 |
DE3323327C1 (en) | 1984-10-31 |
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Legal Events
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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 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH FR GB IT LI LU NL SE |
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PUAL | Search report despatched |
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AK | Designated contracting states |
Designated state(s): AT BE CH FR GB IT LI LU NL SE |
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17P | Request for examination filed |
Effective date: 19850703 |
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17Q | First examination report despatched |
Effective date: 19860507 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19860917 |