DE8803671U1 - Stator for eccentric screw pumps - Google Patents
Stator for eccentric screw pumpsInfo
- Publication number
- DE8803671U1 DE8803671U1 DE8803671U DE8803671U DE8803671U1 DE 8803671 U1 DE8803671 U1 DE 8803671U1 DE 8803671 U DE8803671 U DE 8803671U DE 8803671 U DE8803671 U DE 8803671U DE 8803671 U1 DE8803671 U1 DE 8803671U1
- Authority
- DE
- Germany
- Prior art keywords
- stator
- film
- stator according
- rubber
- casing
- 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
Links
- 229920000728 polyester Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims 2
- 229920003023 plastic Polymers 0.000 claims 2
- 244000309464 bull Species 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 229920006267 polyester film Polymers 0.000 description 4
- 230000009993 protective function Effects 0.000 description 2
- 239000010408 film Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
- F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
- F04C2/1075—Construction of the stationary member
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Description
Die Erfindung geht aus von einem Stator für Exzenterschneckenpumpen aus Gummi od. dgl. mit einem rohrförmigen Mantel, der mit einer f?&t angeordneten Abdeckung versehen ist.The invention is based on a stator for eccentric screw pumps made of rubber or the like with a tubular casing which is provided with a cover arranged at the front.
Bei den bekannten Statoren dieser Ausbildung sind die Abdeckungen kleinere Aufkleber, um damit technische Daten aufzeigen zu können. Diese Aufkleber können keine Schutzfunktion ausüben.In the known stators of this design, the covers are small stickers to show technical data. These stickers cannot provide any protective function.
Der Erfindung liegt die Aufgabe zugrunde, die obigen Statoren so auszuführen, dass die erwähnte Abdeckung auch eine Schutzfunktion z.B. gegen chemische Einflüsse ausüben kann und darüber hinaus auch eine gute mechanische Widerstandsfähigkeit aufweist.The invention is based on the object of designing the above stators in such a way that the mentioned cover can also perform a protective function, e.g. against chemical influences, and also has good mechanical resistance.
Zur Lösung dieser Aufgabe umschliesst erfindungsgemäas die Abdeckung den Mantel über den gesamten Umfang als geschlossener Ring und zudem ist die AbdeckungTo solve this problem, according to the invention the cover encloses the jacket over the entire circumference as a closed ring and in addition the cover is
ti ttl« I« «··«ti ttl« I« «··«
t t » f \ · 4·tt » f \ · 4·
&Lgr;. &Lgr; &Lgr; &Lgr; &Lgr; &lgr;. &lgr; &Lgr; - · · &Lgr;. &Lgr;&Lgr;&Lgr;&Lgr;&lgr;.&lgr;&Lgr; - · ·
• · i
* ft· i
* ft
eine schrumpffähige Folie insb. aus Polyester, wobei man zweckmässigerweise eine Wandstärke von etwa o,l - o,2 mm wählt und diese Abdeckung auch so ausführt, dass sie sich praktisch über die gesamte Statorlänge erstreckt. Mit Vorteil verbleibt aber an den Statorenden eine kleine z.B. etwa 5 - 15 mm lange Zone, die von dieser Abdeckung frei ist, um dort die für die Statormontage erforderlichen Endstücke ansetzen zu können.a shrinkable film, especially made of polyester, whereby a wall thickness of about 0.1 - 0.2 mm is preferably chosen and this cover is also designed in such a way that it extends practically over the entire length of the stator. It is advantageous, however, to leave a small zone, e.g. about 5 - 15 mm long, at the stator ends that is free of this cover in order to be able to attach the end pieces required for stator assembly there.
Ein so ausgeführter Stator ist - ohne ihn in seiner Funktion zu beeinträchtigen - weitgehend gegen äussere Einflüsse geschützt, und zwar sowohl vor dem Einbau, also bei der Lagerhaltung, als auch nach der Montage innerhalb der Exzenterschneckenpumpe. Hinzu kommt weiterhin, dass die erfindungsgemässcAbdeckung auch erhalten bleibt, wenn der Stator durch Spannschellen od. dgl.von aussen her beeinflusst wird, um den Mantel- und Ststordurchmesser zu verringern, eine Massnahme, die im Verschleissfalle des innen liegenden Gummis erforderlich ist.A stator designed in this way is largely protected against external influences - without impairing its function - both before installation, i.e. during storage, and after assembly within the eccentric screw pump. In addition, the cover according to the invention is also retained if the stator is influenced from the outside by clamps or the like in order to reduce the casing and stator diameter, a measure that is necessary if the internal rubber wears out.
Weitere Einzelheiten der Erfindung werden anhand der Zeichnung erläutert, in der ein Ausführungabeispiel der Erfindung dargestellt .'.st, das vorzugsweise verwendet werden soll.Further details of the invention are explained with reference to the drawing, in which an embodiment of the invention is shown, which is preferably to be used.
Die Abbildung zeigt einen Teillängsschnitt durch tinen Stator für eine Exzenterschneckenpumpe, wobei der obere Teil der Abbildung eine Ansicht darstellt.The figure shows a partial longitudinal section through a stator for an eccentric screw pump, the upper part of the figure shows a view.
; s; s
Oer Pumpenhohlreum I1 in dem sich der nicht dargestellte
Rotor befindet, wird durch den Statorkörper 2
aus Gummi begrenzt. In üblicher Weise ist der Pumpen··
hohlraum 1 durch eine zweigängige Schnecke bestimmt,
die durch die Linien 3 angedeutet sind.The pump cavity I 1 in which the rotor (not shown) is located is formed by the stator body 2
made of rubber. The pump is usually
cavity 1 determined by a two-start screw,
which are indicated by lines 3.
Der stfltorkörper 2 ist an der Innenfläche eines Mantels 4
angehaftet, der rohrförmig gestaltet und härter eingestellt ist im Vergleich zum Statorkörper 2. Aussen
können auf den Mantel 4 Spannschellen od. dgl. einwirken,
um einen Verschleiss des Gummi durch eine Durchmesserverringerung auszugleichen. Der Stator ist also
nachstellbar.The stfltor body 2 is on the inner surface of a jacket 4
which is tubular and harder than the stator body 2. Outside
4 clamps or similar can act on the casing,
to compensate for wear of the rubber by reducing the diameter. The stator is therefore
adjustable.
anliegend eine Polyesterfolie 5 vorgesehen, die
schlauch- bzw. ringförmig ausgeführt ist und den j A polyester film 5 is provided adjacent to the
is designed in a tubular or ring-shaped manner and the j
Statorende; dieser von der Folie freie Zylinderabschnitt j ist bei 6 dargestellt; er hat eine Länge F.
Die Polyesterfolie 5 ist eine durch Schrumpfen aufgebrachte dünne Folie mit einer Wandstärke von etwa ,
o,l - 0.2 mm. Im Bereich F kann der Stator an seinen %.
En-Je&eegr; eingespannt werden, ohne die Polyesterfolie 5
zu beschädigen.Stator end; this cylinder section j free of the foil is shown at 6; it has a length F.
The polyester film 5 is a thin film applied by shrinking with a wall thickness of about , o,l - 0.2 mm. In the area F, the stator can be clamped at its %. En-Je&eegr; without removing the polyester film 5
to damage.
-A--A-
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8803671U DE8803671U1 (en) | 1988-03-18 | 1988-03-18 | Stator for eccentric screw pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8803671U DE8803671U1 (en) | 1988-03-18 | 1988-03-18 | Stator for eccentric screw pumps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE8803671U1 true DE8803671U1 (en) | 1989-07-20 |
Family
ID=6822006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8803671U Expired DE8803671U1 (en) | 1988-03-18 | 1988-03-18 | Stator for eccentric screw pumps |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE8803671U1 (en) |
-
1988
- 1988-03-18 DE DE8803671U patent/DE8803671U1/en not_active Expired
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