EP0451085B1 - Screw rotor pump - Google Patents
Screw rotor pump Download PDFInfo
- Publication number
- EP0451085B1 EP0451085B1 EP91710004A EP91710004A EP0451085B1 EP 0451085 B1 EP0451085 B1 EP 0451085B1 EP 91710004 A EP91710004 A EP 91710004A EP 91710004 A EP91710004 A EP 91710004A EP 0451085 B1 EP0451085 B1 EP 0451085B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spindle
- pressure
- screw rotor
- rotor pump
- angle
- 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 - Lifetime
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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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids 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
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids 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
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- 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
- F04C15/0049—Equalization of pressure pulses
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- 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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/084—Toothed wheels
Definitions
- the invention relates to a screw pump with a Drive spindle and at least one spindle according to the preamble of claim 1.
- EP-A-209 984 can be one Screw pump can be removed, the drive spindle with their cantilevered thread in thread formations of some Spindles engages and form several tight chambers should.
- at least one is circumferential Channel provided around the periphery of the spindles so that the last of the tight chambers at an outlet with this - short its release by the chamber - partly via the canal communicates.
- US-A-29 22 377 indicates as an error Screw pumps have a high pressure, temperature and Noise development as a result of the discharge closed pockets. Then one is described Drive spindle with itself at an angle of, for example 30 ° tapering cross-section at the end of the print in the area of a adapted desk surface of the housing. This arrangement is said to those closed pockets by making one Prevent sealing edge over the entire length of the spindle.
- FR-A-799903 describes a liquid pump with a Drive spindle and a spindle, which in one Recess of a surrounding housing between one Pressure chamber and two suction rooms flanking these are.
- the spindle gears are as sliding partitions disclosed, between each of which a pump chamber is formed. These partitions move away Pressure chamber gradually from the surrounding housing wall, so that the tightness of a pump chamber in relation to Pressure space is reduced.
- That outer wall and that inner partitions move away towards the pressure side the pump from each other at individual points or on the entire length, and the tightness of the pump chamber / s decreases towards the pressure chamber gradually in the direction of the latter is the eight-shaped wall at the outer end of one or each individual turn of the spindle gear completely or partly cut out in a funnel shape, or - differently said - the cylindrical interface of one or both Coils have a conical shape.
- a screw pump leads to the solution of this task according to the teaching of patent claim 1;
- the conical surface of the Outer diameter of the pressure side, conically turned Profile outlet of the spindle has one and the Inclination angle below 10 °.
- Of particular importance for the reduction in pulsation is extremely flat Conical surface with an inclination angle of less than 5 °, preferred even below 3 °.
- This bevel on the pressure side causes the appropriate Point in time a gradual and defined opening of the pressure-side chamber takes place; so that through the Closing the suction side resulting volume flow or Pressure increase can be largely compensated.
- the Initial pulsation is significantly reduced.
- this can also be done suction-side profile end with such a flat Be conical surface provided, however, the axial Length of the last-mentioned conical surface should be less than the axial length of the pressure-side cone surface.
- the housing 12 is both on the pressure side and on the suction side Formation of a pressure chamber 20 and a suction chamber 22 each with a pump cover 25 or 24 closed.
- the through the pressure-side pump cover 25 guided drive spindle 14 is in Area of a through hole 26 with an axial thrust compensation piston 28 provided and with a bearing 30 in one Lid attachment 32 additionally supported. In the latter there is also a shaft seal 34.
- the interior 36 of the lid attachment 32 is from the delivery pressure relieved; the liquid entering from the pressure chamber 20 is over discharged a relief channel 38, which via a Connection bore 40 of the housing 12 in the suction chamber 22 flows into.
- Fig. 2 shows that the drive spindle 14 - the profile length - is turned conically at their ends, wherein the length of the pressure-side taper 42 e, the length of the with that end face 44 by an amount i protruding suction cone 42 s with e l , the remaining cylinder length of the drive spindle 14 between the conical surfaces 43, 43 s with q, the pitch angle of the thread 15 of the drive spindle 14 - or the spindle 16 - only partially indicated in FIG. 2 - with t and the pitch with s are.
- the pressure-side cone angle w or the suction-side cone angle w l is preferably 2 °.
- the length adjustment of the entire system is chosen so that during part of the funding period in FIG. 3 reproduced more of sealing lines is generated; this means, an increase from Qvmax to Qvmin.
- the pulsation pattern is thus changed by attaching the described conical surface 43 to the pressure-side spindle end, which leads to a decrease in Qv and -Q kom .
- the extension of the cross-sectionally inclined conical surface 43 has the effect that, on the one hand, the pressure side opens earlier, and on the other hand, the cross-sections become continuously larger during opening. It may be sufficient to provide the pressure side with the cone 42 and to leave the spindle end on the suction side cylindrical.
- the operating system for the three-spindle screw pump 10 shown can be described as follows: On the basis of a certain number of chambers n, which is a measure of the internal pressure build-up in the pump, the ratio of length to slope - ie a / s - represents an analogue quantity for the geometric implementation; the greater this ratio, the smaller the pressure increase per unit length.
- a 1 + (2. N -1).
- the pre-factor x is a measure of the pre-compression, which in the other only depending on the profile for values above 0.1 - 0.15 occurs.
- the pressure-side cone must 42 to that dimension x - that is, to the pre-compression achieved - be coordinated.
- the length e chosen such that for the normal case
- the cone 42 s on the suction side generally allows the closing characteristic to be adapted, as is shown at A 'in FIG. 2.
- This cone 42 s must be precisely matched to the pressure-side cone 42 on the basis of a defined length ratio a / s.
- the length e l of the cone 42 s is expediently chosen to be smaller than the length e of the other cone 42.
- the length e of the pressure-side cone 42 is to be made smaller overall.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Reciprocating Pumps (AREA)
- Supercharger (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Die Erfindung betrifft eine Schraubenspindelpumpe mit einer Antriebsspindel und wenigstens einer Laufspindel nach dem Oberbegriff des Anspruches 1.The invention relates to a screw pump with a Drive spindle and at least one spindle according to the preamble of claim 1.
Bei einem in der DE-A-38 15 158 offenbarten Verfahren zur Verringerung der Druckpulsation wird die arttypische Druckpulsation mit einer erzwungenen inversen Druckpulsation überlagert, welche durch periodisches Absteuern eines Teiles des Förderstromes auf der Druckseite der Förderschrauben erzielbar ist. Dieses Verfahren wird durch eine druckseitige Blende ermöglicht, die mit einem Abfluß zur Saugseite hin ausgebildet ist, welche periodisch abhängig von der Drehstellung der Antriebsspindel mittels eines Verschlußorganes abgedeckt wird. In dieser Druckschrift wird auch erörtert, daß in die Aufnahmebohrungen am druckseitigen Ende des Gehäuses sich zum Saugraum hin verjüngende Keilschrägen eingearbeitet sind.In a method disclosed in DE-A-38 15 158 for Reduction of pressure pulsation becomes the species-typical Pressure pulsation with a forced inverse pressure pulsation superimposed, which is caused by the periodic control of a part of the Flow can be achieved on the pressure side of the conveyor screws is. This process is achieved through a pressure-side cover allows that formed with a drain to the suction side which is periodically dependent on the rotational position of the Drive spindle is covered by a closure member. In This document also discusses that in the Mounting holes on the pressure side end of the housing Tapered wedge bevels are incorporated into the suction chamber.
Der EP-A- 209 984 kann eine Schraubenspindelpumpe entnommen werden, deren Antriebsspindel mit ihrem auskragendem Gewinde in Gewindeeinformungen einiger Laufspindeln eingreift und dabei mehrere dichte Kammern bilden soll. Außerdem ist zumindest ein in Umfangsrichtung verlaufender Kanal um die Peripherie der Laufspindeln vorgesehen, so daß die letzte der dichten Kammern an einem Auslaß mit diesem - -kurz vor dessen Freigabe durch die Kammer -- teilweise über den Kanal kommuniziert. EP-A-209 984 can be one Screw pump can be removed, the drive spindle with their cantilevered thread in thread formations of some Spindles engages and form several tight chambers should. In addition, at least one is circumferential Channel provided around the periphery of the spindles so that the last of the tight chambers at an outlet with this - short its release by the chamber - partly via the canal communicates.
Die US-A-29 22 377 zeigt als Fehler an Schraubenspindelpumpen eine hohe Druck-, Temperatur- und Lärmentwicklung infolge am Austrag entstehender geschlossener Taschen auf. Beschrieben wird dann eine Antriebsspindel mit sich in einem Winkel von beispielsweise 30° verjüngendem Querschnitt am Druckende im Bereich einer angepaßten Pultfläche des Gehäuses. Diese Anordnung soll jene geschlossenen Taschen durch Herstellung einer Dichtkante über die gesamte Spindellänge verhindern.US-A-29 22 377 indicates as an error Screw pumps have a high pressure, temperature and Noise development as a result of the discharge closed pockets. Then one is described Drive spindle with itself at an angle of, for example 30 ° tapering cross-section at the end of the print in the area of a adapted desk surface of the housing. This arrangement is said to those closed pockets by making one Prevent sealing edge over the entire length of the spindle.
Die FR-A-799903 beschreibt eine Flüssigkeitspumpe mit einer Antriebsspindel und einer Laufspindel, die in einer Ausnehmung eines sie umgebenden Gehäuses zwischen einem Druckraum und zwei diesen flankierenden Saugräumen gelagert sind. Die Spindelgänge sind als gleitende Trennwände offenbart, zwischen denen jeweils eine Pumpenkammer gebildet wird. Diese Trennwände entfernen sich in Richtung Druckraum allmählich von der sie umfangenden Gehäusewand, so daß die Dichtigkeit einer Pumpenkammer im Verhältnis zum Druckraum vermindert wird. Dazu sind zwei oder mehr ineinandergreifende Spindelgänge gleicher Breite von einer Wand in Form einer Acht umgeben. Jene äußere Wand und die inneren Trennwände entfernen sich in Richtung Druckseite der Pumpe voneinander an einzelnen Stellen oder auf der ganzen Länge, und die Dichtigkeit der Pumpenkammer/n nimmt gegenüber dem Druckraum allmählich ab, in Richtung der letzteren ist die achtförmige Wandung am äußeren Ende einer oder jeder einzelnen Windung des Spindelganges ganz oder teilsweise trichterförmig ausgeschnitten, oder -- anders gesagt -- die zylindrische Grenzfläche einer oder beider Windungen hat eine konische Form. FR-A-799903 describes a liquid pump with a Drive spindle and a spindle, which in one Recess of a surrounding housing between one Pressure chamber and two suction rooms flanking these are. The spindle gears are as sliding partitions disclosed, between each of which a pump chamber is formed. These partitions move away Pressure chamber gradually from the surrounding housing wall, so that the tightness of a pump chamber in relation to Pressure space is reduced. There are two or more interlocking spindle gears of the same width of one Wall surrounded by an eight. That outer wall and that inner partitions move away towards the pressure side the pump from each other at individual points or on the entire length, and the tightness of the pump chamber / s decreases towards the pressure chamber gradually in the direction of the latter is the eight-shaped wall at the outer end of one or each individual turn of the spindle gear completely or partly cut out in a funnel shape, or - differently said - the cylindrical interface of one or both Coils have a conical shape.
In Kenntnis dieses Standes der Technik hat sich der Erfinder das Ziel gesetzt, eine Schraubenspindelpumpe der eingangs genannten Art dahingehend zu verbessern, daß die Druckpulsation ohne zusätzliche Maschinenteile weitergehend wirksam gedämpft wird.Knowing this state of the art Inventor set the goal of a screw pump to improve the type mentioned in that the Pressure pulsation continues without additional machine parts is effectively dampened.
Zur Lösung dieser Aufgabe führt eine Schraubenspindelpumpe nach der Lehre des Patentspruchs 1; die Konusfläche des am Außendurchmesser konisch angedrehten druckseitigen Profilauslaufs der Spindel weist einen und der Neigungswinkel unter 10° auf. Von besonderer Bedeutung für die Verminderung der Pulsation ist eine äußerst flache Konusfläche mit einem Neigungswinkel unter 5°, bevorzugt sogar unter 3°.A screw pump leads to the solution of this task according to the teaching of patent claim 1; the conical surface of the Outer diameter of the pressure side, conically turned Profile outlet of the spindle has one and the Inclination angle below 10 °. Of particular importance for the reduction in pulsation is extremely flat Conical surface with an inclination angle of less than 5 °, preferred even below 3 °.
Diese druckseitige Anschrägung bewirkt, daß zum geeigneten Zeitpunkt ein allmähliches und definiertes Öffnen der druckseitigen Kammer erfolgt; damit kann der durch das Schließen der Saugseite entstehende Volumenstrom- bzw. Druckanstieg größtenteils ausgeglichen werden. Die Ausgangspulsation wird deutlich verringert.This bevel on the pressure side causes the appropriate Point in time a gradual and defined opening of the pressure-side chamber takes place; so that through the Closing the suction side resulting volume flow or Pressure increase can be largely compensated. The Initial pulsation is significantly reduced.
Nach einem weiteren Merkmal der Erfindung kann auch das saugseitige Profilende mit einer derartigen flachen Konusfläche versehen sein, wobei allerdings die axiale Länge des letztgenannten Konusfläche geringer sein soll als die axiale Länge der druckseitigen Konusfläche.According to a further feature of the invention, this can also be done suction-side profile end with such a flat Be conical surface provided, however, the axial Length of the last-mentioned conical surface should be less than the axial length of the pressure-side cone surface.
Somit wird erreicht, daß durch ein gezieltes Abstimmen von Systemwirklänge und druckseitigem -- gegebenenfalls zusätzlich saugseitigem -- Konus die Pulsation verringert wird. It is thus achieved that by a specific tuning of System effects and pressure side - if necessary additional suction-side cone reduces the pulsation becomes.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt in:
- Fig. 1:
- einen Längsschnitt durch eine Schraubenspindelpumpe;
- Fig. 2:
- einen vergrößerten Teilschnitt durch die Schraubenspindelpumpe;
- Fig. 3:
- ein Diagramm zur Druckpulsation bzw. Volumenstrompulsation der Schraubenspindelpumpe.
- Fig. 1:
- a longitudinal section through a screw pump;
- Fig. 2:
- an enlarged partial section through the screw pump;
- Fig. 3:
- a diagram of the pressure pulsation or volume flow pulsation of the screw pump.
Das Gehäuse 12 ist sowohl druckseitig als auch saugseitig unter
Bildung eines Druckraums 20 und eines Saugraums 22 jeweils mit
einem Pumpendeckel 25 bzw. 24 verschlossen. Die durch den
druckseitigen Pumpendeckel 25 geführte Antriebsspindel 14 ist im
Bereich einer Durchführungsbohrung 26 mit einem Axialschubausgleichkolben
28 versehen sowie mit einem Lager 30 in einem
Deckel aufsatz 32 zusätzlich abgestützt. In letzterem findet sich
auch eine Wellenabdichtung 34.The
Der Innenraum 36 des Deckel aufsatzes 32 ist vom Förderdruck
entlastet; die vom Druckraum 20 eintretende Flüssigkeit wird über
einen Entlastungskanal 38 abgeführt, der über eine
Verbindungsbohrung 40 des Gehäuses 12 in den Saugraum 22
einmündet. The
Fig. 2 macht deutlich, daß die Antriebsspindel 14 -- der
Profillänge -- an ihren Enden konisch abgedreht ist, wobei die
Länge des druckseitigen Konus 42 mit e, die Länge des mit jener
Stirnfläche 44 um ein Maß i überstehenden saugseitigen Konus 42s
mit el, die zwischen den Konusflächen 43, 43s verbleibende
Zylinderlänge der Antriebsspindel 14 mit q, der Steigungswinkel
des in Fig. 2 nur teilweise angedeuteten Gewindeganges 15 der
Antriebsspindel 14 -- oder der Laufspindel 16 -- mit t sowie die
Steigung mit s bezeichnet sind. Der druckseitige Konuswinkel w
bzw. der saugseitige Konuswinkel wl liegt bevorzugt bei 2°.Fig. 2 shows that the drive spindle 14 - the profile length - is turned conically at their ends, wherein the length of the pressure-side taper 42 e, the length of the with that
In Fig. 3 ist graphisch die Längsoptimierung durch eine erfindungsgemäße Vorkompression dargestellt, wobei die dort verwendeten Buchstaben die folgenden Bedeutungen haben:
- A:
- Ausgangspulsation;
- B:
- Pulsation bei Nutzung des Vorkompressionseffektes;
- Qv:
- Verlustvolumenstrom;
- Qkom:
- Kompressionsvolumenstrom.
- A:
- Initial pulsation;
- B:
- Pulsation when using the pre-compression effect;
- Qv:
- Loss volume flow;
- Q com :
- Compression volume flow.
Die Längenabstimmung des gesamten Systems wird so gewählt, daß
während eines Teils der Förderperiode ein in Fig. 3
wiedergegebenes Mehr an Dichtlinien erzeugt wird; dies bedeutet,
einen Anstieg von Qvmax auf Qvmin. Durch gezieltes Verändern der
Dichtgüte über den beschriebenen Konus 42 wird insbesondere auf
der Druckseite das "harte" Öffnen aufgrund der Spindelgeometrie
vermieden. The length adjustment of the entire system is chosen so that
during part of the funding period in FIG. 3
reproduced more of sealing lines is generated; this means,
an increase from Qvmax to Qvmin. By deliberately changing the
Sealing quality over the described
Ausgehend von der Ausgangspulsation wird somit durch das
Anbringen der beschriebenen Konusfläche 43 am druckseitigen
Spindelende das Pulsationsbild geändert, was zu einem
Kleinerwerden von Qv und-Qkom führt. Die Verlängerung der
querschnittlich schrägen Konusfläche 43 bewirkt, daß einerseits
die Druckseite früher öffnet, anderseits die Querschnitte während
des Öffnens kontinuierlich größer werden. So kann es ausreichen,
die Druckseite mit dem Konus 42 zu versehen und das saugseitige
Spindelende zylindrisch zu belassen.Starting from the initial pulsation, the pulsation pattern is thus changed by attaching the described
Für die dargestellte dreispindelige Schraubenspindelpumpe 10 kann
das Wirksystem folgendermaßen beschrieben werden:
Unter Zugrundelegung einer bestimmten Kammerzahl n, welche ein
Maß für den pumpeninternen Druckaufbau ist, stellt das Verhältnis
von Länge zu Steigung --, d.h. also a/s -- eine analoge Größe für
die geometrische Realisierung dar; je größer dieses Verhältnis
ist, umso kleiner wird der Druckanstieg je Längeneinheit.The operating system for the three-
On the basis of a certain number of chambers n, which is a measure of the internal pressure build-up in the pump, the ratio of length to slope - ie a / s - represents an analogue quantity for the geometric implementation; the greater this ratio, the smaller the pressure increase per unit length.
Für die Anwendung des Vorkompressionsverfahrens sind bei der
Längenabstimmung folgende Voraussetzungen zu erfüllen:
x ein Vorfaktor mit 0,15 < x < 0,4 ist, und
n die Anzahl der im Mittel wirkenden Kammern beschreibt.When using the pre-compression procedure, the following requirements must be met when adjusting the length:
x is a prefactor with 0.15 <x <0.4, and
n describes the number of chambers acting on average.
Der Vorfaktor x ist ein Maß für die Vorkompression, die im übrigen profilabhängig erst für Werte oberhalb von 0,1 - 0,15 auftritt. The pre-factor x is a measure of the pre-compression, which in the other only depending on the profile for values above 0.1 - 0.15 occurs.
Zu beachten ist, daß sich die nachstehenden Angaben auf das
besonders vorteilhafte erfindungsgemäße Anschrägen der
Antriebsspindel 14 beziehen.It should be noted that the following information relates to the
particularly advantageous bevels according to the invention
Obtain
Bei konstantem Winkel w (0 < w < 3°) muß der druckseitige Konus 42 auf jenes Maß x -- also auf die erzielte Vorkompression -- abgestimmt werden. So wird beispielsweise für einen Winkel w von etwa 2° die Länge e derart gewählt, daß für den NormalfallWith a constant angle w (0 <w <3 °) the pressure-side cone must 42 to that dimension x - that is, to the pre-compression achieved - be coordinated. For example, for an angle w of about 2 ° the length e chosen such that for the normal case
e ≤ x . s gilt; hier tritt etwa bei x = 0,25; n = 3; s = 80 mm,
d.h. einem a = 2,25 und einem druckseitigen Konus 42 einer Länge
e von 20 mm eine nur sehr kleine Restpulsation auf.e ≤ x. s applies; here occurs approximately at x = 0.25; n = 3; s = 80 mm, ie an a = 2.25 and a pressure-
Der Konus 42s auf der Saugseite erlaubt ganz allgemein die
Anpassung der Schließcharakteristik, wie es bei A' in Fig. 2
dargestellt ist. Dieser Konus 42s muß unter Zugrundelegung eines
definierten Längenverhältnisses a/s auf den druckseitigen Konus
42 genau abgestimmt sein. So ist zweckmäßigerweise die Länge el
des Konus 42s kleiner zu wählen als die Länge e des anderen Konus
42. Ferner ist bei unverändertem Maß des Spindelpakets 14, 16 die
Länge e des druckseitigen Konus 42 insgesamt kleiner zu
gestalten.The
Eine sorgfältige Abstimmung der Gesamtgeometrie führt zu einer wirksamen Pulsationsverringerung in einem weiten Druckbereich von 10 bis 80 bar sowie im und Viskositätsbereich von 20 bis 200 mm2/s.Careful coordination of the overall geometry leads to effective pulsation reduction in a wide pressure range from 10 to 80 bar and in the and viscosity range from 20 to 200 mm 2 / s.
In jedem Falle wird ohne zusätzliche Maschinenteile eine deutlich verringerte Pulsation erreicht.In any case, one becomes clear without additional machine parts reduced pulsation reached.
Claims (5)
- Screw rotor pump comprising a drive spindle and at least one idler spindle mounted between a suction chamber and a delivery chamber in a recess in a housing surrounding them, the outer diameter of the profile run-out being turned conically at the delivery end, characterised in that the angle of inclination (w) of the conical surface (43) of the spindle (14, 16) is less than 10°.
- Screw rotor pump according to claim 1, characterised in that the spindle (14, 16) has a conical surface (43s) with an angle of inclination (wl) at its suction end.
- Screw rotor pump according to claim 1 or claim 2, characterised in that the angle of inclination (w, wl) is less than 5°.
- Screw rotor pump according to claim 1 or claim 2, characterised in that the angle of inclination (w, wl) is less than 3°.
- Screw rotor pump according to claims 1 and 2, characterised in that the axial length (e) of the conical surface (43) at the delivery end is greater than the axial length (el) of the conical surface (43s) at the suction end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96105318A EP0727581B1 (en) | 1990-03-08 | 1991-03-07 | Screw rotor pump |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4007273 | 1990-03-08 | ||
| DE4007273 | 1990-03-08 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96105318A Division EP0727581B1 (en) | 1990-03-08 | 1991-03-07 | Screw rotor pump |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0451085A2 EP0451085A2 (en) | 1991-10-09 |
| EP0451085A3 EP0451085A3 (en) | 1992-07-08 |
| EP0451085B1 true EP0451085B1 (en) | 1998-08-12 |
Family
ID=6401666
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96105318A Expired - Lifetime EP0727581B1 (en) | 1990-03-08 | 1991-03-07 | Screw rotor pump |
| EP91710004A Expired - Lifetime EP0451085B1 (en) | 1990-03-08 | 1991-03-07 | Screw rotor pump |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96105318A Expired - Lifetime EP0727581B1 (en) | 1990-03-08 | 1991-03-07 | Screw rotor pump |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5123821A (en) |
| EP (2) | EP0727581B1 (en) |
| JP (1) | JP3036874B2 (en) |
| KR (1) | KR0177815B1 (en) |
| AT (2) | ATE169721T1 (en) |
| BR (1) | BR9100993A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI104440B (en) * | 1995-06-22 | 2000-01-31 | Kone Corp | Screw pump and screw pump screw |
| US6623262B1 (en) | 2001-02-09 | 2003-09-23 | Imd Industries, Inc. | Method of reducing system pressure pulsation for positive displacement pumps |
| GB0226529D0 (en) * | 2002-11-14 | 2002-12-18 | Dana Automotive Ltd | Pump |
| US8096288B2 (en) * | 2008-10-07 | 2012-01-17 | Eaton Corporation | High efficiency supercharger outlet |
| DE102017210767B4 (en) | 2017-06-27 | 2019-10-17 | Continental Automotive Gmbh | Screw pump, fuel delivery unit and fuel delivery unit |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2652192A (en) * | 1947-06-13 | 1953-09-15 | Curtiss Wright Corp | Compound-lead screw compressor or fluid motor |
| US2952216A (en) * | 1956-03-13 | 1960-09-13 | Wildhaber Ernest | Rotary screw unit for displacing fluid |
| US2922377A (en) * | 1957-09-26 | 1960-01-26 | Joseph E Whitfield | Multiple arc generated rotors having diagonally directed fluid discharge flow |
| CH390690A (en) * | 1959-02-23 | 1965-04-15 | Imo Industri Ab | Screw pump |
| FR1243471A (en) * | 1959-08-31 | 1960-10-14 | Improvements to rotors for pumps, motors, compressors, fans, meters and other similar devices | |
| US3103894A (en) * | 1960-02-18 | 1963-09-17 | Laval Turbine | Screw pump |
| DE2033201C3 (en) * | 1970-07-04 | 1979-02-01 | Allweiler Ag | Screw motor or pump |
| SE383774B (en) * | 1975-04-02 | 1976-03-29 | Imo Industri Ab | SCREW PUMP |
| JPS5238615A (en) * | 1975-09-22 | 1977-03-25 | Mayekawa Mfg Co Ltd | Screw compressor |
| JPS5936116B2 (en) * | 1976-08-07 | 1984-09-01 | 株式会社荏原製作所 | fluid machinery |
| FR2538463B1 (en) * | 1982-12-23 | 1985-06-21 | Dba | VOLUMETRIC CONICAL SCREW MACHINE |
| JPS61294178A (en) * | 1985-06-24 | 1986-12-24 | Kawasaki Heavy Ind Ltd | Screw pump |
| DE3815158A1 (en) * | 1988-05-04 | 1989-11-16 | Allweiler Ag | Method for reducing the pressure pulsation of a positive-displacement pump, in particular a screw pump, and a screw pump designed according to this method |
-
1990
- 1990-11-26 US US07/617,678 patent/US5123821A/en not_active Expired - Lifetime
-
1991
- 1991-03-07 EP EP96105318A patent/EP0727581B1/en not_active Expired - Lifetime
- 1991-03-07 EP EP91710004A patent/EP0451085B1/en not_active Expired - Lifetime
- 1991-03-07 AT AT91710004T patent/ATE169721T1/en not_active IP Right Cessation
- 1991-03-07 AT AT96105318T patent/ATE176717T1/en not_active IP Right Cessation
- 1991-03-08 KR KR1019910003767A patent/KR0177815B1/en not_active IP Right Cessation
- 1991-03-08 JP JP3069138A patent/JP3036874B2/en not_active Expired - Lifetime
- 1991-03-08 BR BR919100993A patent/BR9100993A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0451085A2 (en) | 1991-10-09 |
| US5123821A (en) | 1992-06-23 |
| EP0451085A3 (en) | 1992-07-08 |
| KR910017081A (en) | 1991-11-05 |
| EP0727581B1 (en) | 1999-02-10 |
| BR9100993A (en) | 1991-11-05 |
| ATE169721T1 (en) | 1998-08-15 |
| ATE176717T1 (en) | 1999-02-15 |
| EP0727581A1 (en) | 1996-08-21 |
| JPH05231341A (en) | 1993-09-07 |
| JP3036874B2 (en) | 2000-04-24 |
| KR0177815B1 (en) | 1999-04-15 |
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