WO2002002948A1 - Zerkleinerungspumpe - Google Patents
Zerkleinerungspumpe Download PDFInfo
- Publication number
- WO2002002948A1 WO2002002948A1 PCT/DE2001/002351 DE0102351W WO0202948A1 WO 2002002948 A1 WO2002002948 A1 WO 2002002948A1 DE 0102351 W DE0102351 W DE 0102351W WO 0202948 A1 WO0202948 A1 WO 0202948A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cutting
- pump
- knife
- passages
- rotating knife
- Prior art date
Links
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
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/001—Pumps for particular liquids
Definitions
- the invention relates to a comminution pump for conveying waste water containing solids, as a rotating displacement pump, with an electric motor, with a pump housing, with a fixed pump stator and an eccentrically mounted rotor, and with a comminution device consisting of at least one fixed and at least one rotating knife, the Comminution device is driven via the end of the pump rotor remote from the drive shaft of the electric motor, the knives are designed as superimposed disks with cutting passages, the cutting passages form circular-arc-shaped or sickle-shaped cutting edges and at least two cutting passages at least partially overlap in at least one angular position of the rotating knife.
- Such a comminution pump is known from DE 198 02 025 Cl.
- This pump ensures as far as possible freedom from blockages and undisturbed operation even in the presence of long-fiber and solid components in the medium.
- nylon stockings tend to be pulled between the open areas of the knives and loop around and wrap around the pump rotor or the rotating knife. This does not necessarily lead to a blockage of the pump or a blockage, but the operation of the pump is limited.
- the invention is therefore based on the object of further improving the comminution device of a pump of the type mentioned at the outset with regard to freedom from blockages and interference in the presence of long-fiber and solid constituents in the delivery medium.
- the object is achieved according to the invention in that the edge portions of the cutting passages leading in the direction of rotation of the rotating knife are each undercut to form a free space between the knives.
- a further significant improvement in the size reduction performance of the pump according to the invention is achieved in that only a cutting passage which is offset or eccentrically arranged with respect to the central longitudinal axis of the pump housing is provided in the fixed knife.
- a plurality of cutting passages designed as circular holes were provided, which are arranged on a circular arc concentric to the center of the disks. The measure, in contrast, to provide only a single cutting passage, significantly increases the size reduction of the pump according to the invention.
- the cutting passage in the fixed knife is slightly larger than that in the rotating knife.
- Two cutting passages are preferably provided in the rotating knife.
- the diameter of the disk forming the rotating knife is less than or equal to half the diameter of the disk forming the fixed knife.
- the undercuts are preferably designed such that the cutting edges of the cutting passages are interrupted in the regions that advance in the direction of rotation. These areas are already passive during a cutting process. Such a geometry of the rotating knife has proven to be optimal in almost every respect. It can be seen that this also slightly increases the passage area through the cutting passages.
- the rotating knife is expediently arranged downstream in the conveying direction of the medium to be pumped.
- the cutting passage of the fixed knife tapers downstream and forms a circumferential beveled cutting edge.
- the cutting passages of the rotating knife expediently expand downstream.
- FIG. 1 is a partial sectional view of the pump housing in the area of the suction side with a comminution device arranged therein,
- Fig. 4 is a view in the direction of the arrow labeled IV in Fig. 3 and 5 is a view in the direction of the arrow labeled V in Fig. 3rd
- the pump according to the invention consists of an electric motor, drive shaft, coupling rod, joints, pump housing 1, pump stator 2 and pump rotor 3 and is designed as a known eccentric screw pump.
- the pump which is of conventional construction except for the shredding unit, is not shown completely in the figures.
- the pump rotor 3 is driven in a known manner within the pump stator 2 via the shaft of an electric motor by means of a coupling rod attached to two joints. As a result, the pump rotor 3 executes a rotating and slightly radial movement within the pump housing 1.
- FIG. 1 shows the suction side of the pump, a fixed knife 5 and a rotating knife 6 being arranged in a funnel-shaped suction nozzle 4, both of which are designed as circular disks.
- the suction port 4 and the end of the pump housing 1 remote from the electric motor are coupled to one another by a flange connection 7.
- the rotating knife 6 is rotatably fixed to a knife shaft 8, which in turn is screwed to a threaded pin 9 in the end face of the pump rotor 3, so that a
- Rotational movement of the eccentrically mounted pump rotor 3 causes both a rotation and a radial deflection of the rotating knife 6.
- the rotating knife 6 and / or the knife shaft 8 can be axially adjustably connected to the pump rotor 3 in order to adjust the play between the
- the rotating knife 6 and / or the knife shaft 8 can also be axially resiliently connected to the pump rotor 3, as is described, for example, in DE 198 02 025 C1, by an elastic gap setting between the fixed knife 5 and the rotating knife 6 to ensure.
- the gap adjustment also enables the knives to be readjusted when worn.
- the knives 5, 6 are provided with cutting passages 10, 11, with 11 the cutting passes in the rotating knife and 10 with a single cutting passage in the fixed knife 5.
- At least the cutting passage 10 in the fixed knife is designed as a circular hole which tapers downstream of the medium to be conveyed and thus forms a circumferential cutting edge 12a.
- the imaginary longitudinal axis 13 leading through the center of the cutting passage 10 is laterally offset from the central longitudinal axis 14 of the pump housing 1, so that there is an eccentric arrangement of the cutting passage 10 on the fixed knife 5.
- a total of two cutting passages 11 are arranged in the rotating knife 6, namely at an angular distance of 180 °.
- the cutting passages 11, on the one hand, and the cutting passage 10, on the other hand, are arranged approximately in superimposed radius areas, so that the cutting passages 10, 11 are permeable in certain angular positions of the knives 5, 6, i.e. overlap.
- the cutting passages 10, 11 each form circular-arc-shaped or crescent-shaped cutting edges 12a, 12b.
- the cutting passages 11 in the rotating knife 6 taper upstream of the medium to be conveyed, as can be seen in particular in FIG. 1, these forming the cutting edges 12b which only partially circulate.
- the interruption of the cutting edges 12b of the rotating knife 6, the diameter of which corresponds to approximately half the diameter or less of the fixed knife 5, can be attributed to recesses 15 provided in the rotating knife 6 on its side facing the fixed knife 5, each of which undercuts the Form cutting passages 11, specifically in the edge sections 17 leading in the direction of rotation of the rotating knife 6.
- the direction of rotation of the rotating knife 6 (indicated by arrow 18) is to the right, ie from the in FIG Fig. 2 selected viewing direction clockwise, the term leading to a single cutting passage 11 is related.
- the recesses 15 forming the undercuts reduce the free areas of the knives 5, 6 arranged one above the other, which has the effect of reducing friction and wear and preventing blockages.
- the recesses 15 may, for example, have been sunk in from the side of the rotating knife 6 facing the fixed knife 5, such that, as can be seen from a combination of FIGS. 3 and 5, on the side opposite the cutting edge 12b still obtained in the rotating knife 6 each results in a shoulder 16 which extends approximately radially.
- This type of countersinking of the material of the rotating disk slightly increases the passage through the cutting passages 11.
- the edge region of the cutting passages 11, which leads in the direction of rotation of the rotating knife 6, is reduced in thickness such that there is no cutting edge there.
- the cutting passages 11 of the rotating knife 6 are perforated on their outer circumference where they meet with the outer circumference of the rotating knife 6. Such openings do not necessarily have to be provided, rather the diameter of the rotating knife 6 can be selected such that the cutting passages 11 are closed circumferentially.
- the cutting passages 10, 11 in certain angular positions of the rotating knife 6 form a passage for the medium to be conveyed and any solids contained therein.
- This passage has an approximately elliptical contour, which contracts in the shape of a sickle or arc during the rotational movement of the knife 6, making a drawing cut on solids approximately contained in the medium to be conveyed. crushing pump
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Rotary Pumps (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Luminescent Compositions (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01951434A EP1297260B1 (de) | 2000-07-04 | 2001-06-26 | Zerkleinerungspumpe |
DE50101483T DE50101483D1 (de) | 2000-07-04 | 2001-06-26 | Zerkleinerungspumpe |
DE10193285T DE10193285D2 (de) | 2000-07-04 | 2001-06-26 | Zerkleinerungspumpe |
HU0301705A HUP0301705A2 (en) | 2000-07-04 | 2001-06-26 | Comminutor pump |
AU2001272356A AU2001272356A1 (en) | 2000-07-04 | 2001-06-26 | Comminutor pump |
AT01951434T ATE259469T1 (de) | 2000-07-04 | 2001-06-26 | Zerkleinerungspumpe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20011412.3 | 2000-07-04 | ||
DE20011412U DE20011412U1 (de) | 2000-07-04 | 2000-07-04 | Zerkleinerungspumpe |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002002948A1 true WO2002002948A1 (de) | 2002-01-10 |
Family
ID=7943380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2001/002351 WO2002002948A1 (de) | 2000-07-04 | 2001-06-26 | Zerkleinerungspumpe |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1297260B1 (de) |
AT (1) | ATE259469T1 (de) |
AU (1) | AU2001272356A1 (de) |
DE (3) | DE20011412U1 (de) |
HU (1) | HUP0301705A2 (de) |
WO (1) | WO2002002948A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1923821U (de) * | 1965-07-06 | 1965-09-16 | Eugen Soeding | Exzenterschneckenpumpe. |
DE1950502U (de) * | 1966-07-30 | 1966-11-24 | Eugen Soeding | Exzenterschnekkenpumpe. |
CH439982A (de) * | 1964-06-29 | 1967-07-15 | Bachmann Walter | Güllenpumpe |
DE19802025C1 (de) * | 1998-01-21 | 1999-06-10 | Werner Dipl Ing Arnswald | Zerkleinerungspumpe |
-
2000
- 2000-07-04 DE DE20011412U patent/DE20011412U1/de not_active Expired - Lifetime
-
2001
- 2001-06-26 AT AT01951434T patent/ATE259469T1/de not_active IP Right Cessation
- 2001-06-26 WO PCT/DE2001/002351 patent/WO2002002948A1/de active IP Right Grant
- 2001-06-26 AU AU2001272356A patent/AU2001272356A1/en not_active Abandoned
- 2001-06-26 HU HU0301705A patent/HUP0301705A2/hu unknown
- 2001-06-26 DE DE10193285T patent/DE10193285D2/de not_active Expired - Fee Related
- 2001-06-26 EP EP01951434A patent/EP1297260B1/de not_active Expired - Lifetime
- 2001-06-26 DE DE50101483T patent/DE50101483D1/de not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH439982A (de) * | 1964-06-29 | 1967-07-15 | Bachmann Walter | Güllenpumpe |
DE1923821U (de) * | 1965-07-06 | 1965-09-16 | Eugen Soeding | Exzenterschneckenpumpe. |
DE1950502U (de) * | 1966-07-30 | 1966-11-24 | Eugen Soeding | Exzenterschnekkenpumpe. |
DE19802025C1 (de) * | 1998-01-21 | 1999-06-10 | Werner Dipl Ing Arnswald | Zerkleinerungspumpe |
Also Published As
Publication number | Publication date |
---|---|
DE50101483D1 (de) | 2004-03-18 |
EP1297260A1 (de) | 2003-04-02 |
DE10193285D2 (de) | 2003-06-05 |
EP1297260B1 (de) | 2004-02-11 |
ATE259469T1 (de) | 2004-02-15 |
HUP0301705A2 (en) | 2004-01-28 |
DE20011412U1 (de) | 2001-11-15 |
AU2001272356A1 (en) | 2002-01-14 |
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