EP4108934A1 - Ensemble comprenant une roue motrice et une tête de coupe d'une pompe pour fluide chargé de solide - Google Patents

Ensemble comprenant une roue motrice et une tête de coupe d'une pompe pour fluide chargé de solide Download PDF

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Publication number
EP4108934A1
EP4108934A1 EP22175435.1A EP22175435A EP4108934A1 EP 4108934 A1 EP4108934 A1 EP 4108934A1 EP 22175435 A EP22175435 A EP 22175435A EP 4108934 A1 EP4108934 A1 EP 4108934A1
Authority
EP
European Patent Office
Prior art keywords
cutting
impeller
pump
edges
cutter head
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.)
Pending
Application number
EP22175435.1A
Other languages
German (de)
English (en)
Inventor
Johannes REUSCHEL
Benjamin Wegner
Andreas Zeiss
Thomas Keil
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.)
Wilo SE
Original Assignee
Wilo SE
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 Wilo SE filed Critical Wilo SE
Publication of EP4108934A1 publication Critical patent/EP4108934A1/fr
Pending 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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
    • B02C18/0092—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage for waste water or for garbage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B02C2018/188—Stationary counter-knives; Mountings thereof

Definitions

  • the invention relates to an arrangement comprising an impeller and a cutting head for solid-loaded liquid of a pump, the cutting head being stationarily connected to the impeller in an axial extension thereof for interaction with a cutting ring, and a cutting head base body having a plurality of cutting segments with cutting head cutting edges for comminuting the solid which cutter head cutting edges extend radially away from the cutter head body.
  • Admixtures of solids in liquids such as waste water can clog pumps or pipes.
  • so-called cutters are used, which are located in front of a suction area of the pump, in order to comminute the solids contained in the liquid.
  • Cutting units known from the prior art often have a fixed part, called the cutting surface or cutting element, and a rotating part, called the cutting head.
  • the cutting surfaces also known as the cutting sieve, have openings through which the liquid flows to an impeller of the pump. If the cutting surface is flat or conical, it is referred to as a cutting insert.
  • a cylindrical shape of the cutting surface is called a cutting ring.
  • a cutting system upstream of the pump usually has a negative effect on the efficiency and the characteristic curve of the pump due to the influence on the inflow into the pump.
  • leading cutting head cutting edges which means a better flow in the impeller area and such a higher pump characteristic is achieved. Solids that have passed the cutting unit formed by the cutting ring and cutting head do not hit the leading edges directly. This prevents fibrous components from getting around the leading edges and clogging the pump.
  • Leading edges extending essentially parallel to the cutting head cutting edges means in particular that the cutting head cutting edges and the leading edges extend parallel or pivoted by an angle of ⁇ 2°, 5° or 10° with respect to one another.
  • a pump is generally referred to as a fluid machine that uses a rotary movement and dynamic forces to convey liquids as the medium.
  • the pump is preferably designed as a centrifugal pump.
  • a centrifugal pump in addition to a tangential acceleration of the liquid, the medium, centrifugal force occurring in radial flow is used for delivery, so that such pumps are also referred to as centrifugal pumps.
  • the pump can preferably be used for a hydraulic system in a building, for example as a waste water pump.
  • a housing of a motor of the pump can be arranged above a pump housing, in which the impeller driven by the motor via the motor shaft is provided for pumping the fluid, the housing of the motor being connected to the pump housing in a stationary manner and/or being designed in one piece can be.
  • the motor shaft preferably protrudes from the housing of the motor into the pump housing on a drive side and/or the impeller is connected in a stationary manner to the motor shaft on the drive side.
  • the liquid preferably comprises water or another liquid medium such as waste water.
  • the fluid can include solids such as impurities of any kind, in particular faeces, sediments, dirt, sand, or also smaller pieces of wood, undergrowth, textiles or rags or the like.
  • the housing of the motor and/or the pump housing is preferably made of metal, in particular cast iron or stainless steel, and/or plastic.
  • the cutting head cutting edges are preferably arranged so that they overlap radially with respect to the leading edges. This means in particular that the leading edges are at least partially arranged at the same axial height and/or at least partially in a common radial plane as the cutter head cutting edges.
  • the axial extension of the cutting head cutting edges is preferably greater than the axial extension of the leading edges.
  • the cutting head can be screwed to the impeller, for example, and can be fixed to it in this way, ie the cutting head and impeller are designed in two parts.
  • the cutting head can be made in one piece with the impeller, for example made of a metal or a plastic.
  • radially leading ahead of the leading edges means in particular that the leading edges and the cutter head cutting edges do not lie on a radial line, but are arranged fixed in front of them in the direction of rotation, for example by a few degrees or mm.
  • the cutting segments preferably extend radially away from the main body of the cutter head and/or are arranged at regular intervals and/or are designed in one piece with the main body of the cutter head.
  • the axially extending cutting head cutting edges are preferably provided radially on the outside of the cutting segments and preferably interact with cutting teeth of the cutting ring for comminuting the solid.
  • a rotational movement of the motor shaft can, for example, cause a textile caught by the cutting head cutting edges of the cutting body to come into engagement with the cutting teeth as a solid, so that the textile is shredded and as a result cannot clog the pump.
  • the cutting head cutting edges each extend essentially axially.
  • substantially axially means in particular that, for example, a draft bevel can be included and/or the cutting head cutting edges can extend pivoted by ⁇ 3%, 5% or 10% from the axial line.
  • the cutting head cutting edge can be designed in the form of a serrated edge.
  • the cutting head cutting edges are at an angle ⁇ 1.5°, 2.5°, 5° or 10° and in particular ⁇ 2.5°, 5°, 10°, 15°, 20°, 30° or 45° leading arranged towards the leading edges.
  • angles of, for example, ⁇ 15° or 20° and in particular ⁇ 60°, 75° or 90° are also conceivable.
  • solids that have passed the cutting mechanism formed by the cutting ring and the cutting head do not hit the leading edges directly, so that fibrous components of the solids can be prevented from laying around the leading edges and clogging the pump.
  • the impeller has an opening, within which the cutting head is arranged, and the leading edges are arranged spaced radially outwards from the edge of the opening.
  • the distance is preferably ⁇ 2, 5, 10, 15 or 20 mm. Such a spacing also contributes to a better flow in the impeller area and an improved pump characteristic.
  • the number of cutter head cutting edges is equal, unequal or twice the number of blades and/or leading edges. In other words, however, a cutting head cutting edge is preferably assigned to the leading edge. If the cutter head has cutter head cutting edges of different axial lengths, the longer cutter head cutting edges preferably correspond to the number of blades, while the shorter cutter head cutting edges, viewed axially, do not reach the blades. In such a case, the number of longer cutter head cutting edges is preferably equal to the number of blades and/or leading edges. The leading edges preferably extend in the axial direction.
  • the impeller has a support disk on the motor side with a hub for receiving a motor shaft of the pump and a cover disk with a suction side on the suction side, the blades being provided between the support disk and the cover disk.
  • the impeller is preferably designed as a closed two-channel impeller.
  • the impeller can also be designed as an open impeller, as is known from the prior art.
  • the impeller is preferably stationarily connected to the motor shaft in a non-positive and/or positive manner.
  • Carrier disc and / or cover disc are preferably designed circular and arranged parallel to each other, while the Blades extend axially and helically radially outward between the opening and an outer edge of the impeller. If the cutting head has four cutting segments with cutting head cutting edges on the outside, with opposite segments set back, the radial position of the cutting head on the hub is preferably chosen such that the continuous cutting segments lie in the area of the two leading edges of the impeller.
  • At least two of the cutting head cutting edges have axial extensions of different lengths and the cutting head cutting edge with the longer axial extension is arranged at a distance from the leading edge. Due to the different lengths of cutting head cutting edges, a higher and thus better pump characteristic is achieved. While the longer cutting head cutting edge can interact with impeller blades, the shorter cutting head cutting edge acts additionally on the solids, resulting in a better cutting result and less clogging of the pump. An even better cutting result can be achieved if, for example, one third of the cutting head cutting edges are made longer for interaction with the blades of the impeller and two thirds of the cutting head cutting edges are made shorter.
  • the cutting head In order to form at least two cutting head cutting edges, it is preferred to have a shorter design and a multiple thereof to be longer. More preferably, the cutting head is designed to be rotationally symmetrical. Furthermore, the cutting head cutting edge can be designed in the form of a serrated edge. A shorter cutter head cutting edge is preferably provided between two longer cutter head cutting edges.
  • the object of the invention is further achieved by a pump with a pump housing and an arrangement arranged in the pump housing as described above, a cylindrical sealing gap being provided for radial sealing of the impeller between a suction side of the impeller and the pump housing.
  • the pump has a stationary cutting ring provided on the pump or the cutting ring and an arrangement as described above, the cutting ring at least partially enclosing the impeller to form a conical sealing gap for radial sealing.
  • the proposed sealing gaps is a reliable Sealing of the pump achieved.
  • a shaft sealing ring and/or a split ring can be provided in the sealing gap.
  • the shaft sealing ring preferably has a sealing lip which rests on the impeller and is preferably pressed radially onto the impeller by a tubular spring and/or garter spring.
  • the shaft sealing ring can be introduced with a firm seat in the pump housing and/or is preferably designed as a radial shaft sealing ring.
  • a V-ring seal preferably made of nitrile rubber, can also be provided.
  • the cutting ring has a plurality of cutting teeth cooperating with the cutting edges of the cutting head for comminuting the solid matter collected.
  • a pump enables a better inflow in the inlet area of the impeller, which results in a higher pump characteristic curve, since interference with the inflow between the blades or the blade channels formed by them is reduced compared to designs known from the prior art. Due to the cutting head cutting edges of different lengths described above, solids with larger diameters are held back better until they are sufficiently comminuted by the cutting ring on the outside, so that a better cutting result and a lower risk of blockages are achieved.
  • the pump designed as a submersible sewage motor pump, has a cutting mechanism upstream of an impeller 3, comprising a cutting head 1 and a cutting ring 2, which in figs 2 to 4 are shown.
  • Cutting head 1, cutting ring 2 and impeller 3 of the pump do not necessarily have to be designed as described below.
  • the pump can have, for example, the cutting head 1 described below, but the cutting ring 2 and impeller 3 can be designed differently than described below.
  • the cutting ring 2 and the impeller 3. when the cutting ring 2 is designed as described below, for example, the cutting head 1 does not have to be designed as described below, which is, however, entirely possible.
  • the partial sectional view of 1 shows part of a pump housing 4 of the pump, above which a housing (not shown) for a motor of the pump is provided during regular operation of the pump.
  • the motor drives the impeller 3 via a motor shaft (not shown), through which liquid loaded with solids can be sucked in from a suction side 5 formed below the pump housing 4 .
  • the following terms used axially and radially based on the axial extent of the motor shaft.
  • the cutting head 1 is stationary, in particular non-positively and/or positively connected to the impeller 3 by means of a cutting head screw 6 and rotates accordingly with the impeller 3 during operation of the pump.
  • the cylindrical cutting ring 2 enclosing the cutting head 1 is connected in a stationary manner to the pump housing 4 by means of a plurality of cutting ring screws 7 .
  • a radial seal is provided between the cutting ring 2 and the impeller 3 .
  • the cutting head 1 protrudes into the suction side 5 so that liquid drawn in from the suction side 5 first flows through a gap provided between the cutting head 1 and the cutting ring 2 in order to then be conveyed through the impeller 3 .
  • the rotary movement of the cutting head 1 relative to the cutting ring 2 causes solids contained in the liquid to be crushed before they reach the impeller 3 .
  • the cutting head 1 has a cylindrical, rotationally symmetrical cutting head base body 8 made of metal, through which a bore 9 for receiving the cutting head screw 6 for attachment to the impeller 3 extends axially.
  • Cutting segments 11 arranged at regular intervals are provided on the peripheral surface 10 of the basic cutter head body 8 and are designed in one piece with the basic cutter head body 8 .
  • the cutting segments 11 each extend radially away from the main body 8 of the cutting head.
  • all cutter head base bodies 8 extend axially from a liquid inlet side 12 of cutter head 1 opposite impeller 3 and facing suction side 5 in the direction of impeller 3 and thus form axially running cutter head cutting edges 13 .
  • two cutting head cutting edges 13 each have a different angle than the other two cutting head cutting edges 13 long axial extent, since a first part of the cutter head cutting edges 13 extends from the liquid entry side 14 substantially or over the entire axial extent of the cutter head 1 and a second part of the cutter head cutting edges 13 extends from the liquid Trittsseite14 only extends over part of the entire axial extent of the cutting head 1.
  • the second part of the cutting segments 11 is shortened by about half compared to the first part, with the cutting segments 11 arranged opposite one another being identical in design.
  • the shortened part of the cutting segments 11 of the axial extent is designed without cutting edges 13 of the cutting head.
  • the shortened cutting segments 11 have a constant radial diameter up to about half of the axial extent of the cutting head 1 and then taper in diameter towards the side 14 facing the impeller 3 in the form of a drop.
  • the cutting head 1 On its side 14 axially facing the impeller 3 , the cutting head 1 has a circumferential, cylindrical collar 15 which is designed in one piece with the cutting head body 8 and is flush with the cutting head cutting edges 13 in terms of its radial outer diameter.
  • the collar 15 tapers in its diameter from the side 14 in the direction of the liquid inlet side 12 in the cutting head body 8 evenly.
  • the cutting segments 11 Facing the direction of rotation of the cutting head 1, the cutting segments 11 extend concavely radially away from the main body 8 of the cutting head towards the respective cutting head cutting edge 13. In contrast, facing away from the direction of rotation of the cutting head 1, the cutting segments 11 extend linearly radially away from the main body 8 of the cutting head the cutting head cutting edge 13. The same applies to the drop-shaped taper of the shortened cutting segments 11.
  • the cutting segments 11 and the cutting head cutting edges 13 are beveled on the liquid inlet side 12 of the cutting head 1 opposite the impeller 3, as shown in FIG 2 can be seen.
  • the cutting head 1 described above can interact with its cutting head cutting edges 13 with the stationary cutting ring 2 provided on the pump, having a plurality of cutting teeth 16 as described below.
  • FIG. 3 shows a cutting ring 2 of the pump in two perspective views (top) and in a sectional view (bottom) according to the preferred embodiment of the invention.
  • the cutting ring 2 has a ring-like cutting ring base body 18 forming an opening 17 .
  • in 1 When installed, the cutting head 1 shown is guided through the opening 17 .
  • the cutting ring 2 is fixed in place in an axial extension of the impeller 3 to the pump housing 4 of the pump by means of three cutting ring screws 7 grouped around the opening 17 .
  • a plurality of cutting teeth 16 with inner cutting edges 19 oriented axially in the direction of the impeller 3 and outer in the direction of the suction side 5 of the pump away from the impeller 3 are provided at regular intervals on the rotationally symmetrical cutting ring base body 18 around the opening 17, the cutting edges 19 when turning the cutting head 1 with the cutting head cutting edges 13 of the same.
  • Three cutting teeth 16 each extend axially away from the cutting ring base body 18 in the direction of the impeller 3 inward into the pump housing 4 and three cutting teeth 16 each extend outward in the direction of the suction side 5 out of the pump housing 4, as also in FIG 1 implied.
  • four, eight, twelve or more cutting teeth 16 can be provided, which are oriented alternately outwards and inwards. In axial extension is between a tip of an external cutting tooth 16 and a tip of an inner cutting tooth 16 around the opening 17 around an inner cutting edge 19 and an outer cutting edge 17, respectively.
  • the outwardly extending cutting teeth 16 are shown in the sectional view at the bottom of FIG 3 shown below the disc-like cutting ring body 18, while the inwardly extending cutting teeth 16 are shown in the sectional view above the cutting ring body 18.
  • the perspective figure above right in 3 corresponds to this representation and shows the view of the cutting ring 2 seen from the suction side 5 , while the perspective illustration at the top left shows the view of the cutting ring 2 seen from the pump housing 4 .
  • a radially outwardly extending material recess 20 is introduced behind the cutting edge 19 in the direction of rotation of the impeller 4 .
  • Such a material recess 20 is also made in the inwardly extending cutting teeth 16 .
  • the outer diameter of the cutting teeth 16, which extend annularly around the opening 17 in a wave-like or sinusoidal manner around the opening in a plan view, is the same, while the inner diameter in the area of the material recess 20 is larger than in the area of the cutting teeth 16 without a material recess.
  • a radially outwardly extending pocket-like axial recess 22 is introduced into the cutting ring base body 18 in a valley 21 between at least two outwardly extending cutting teeth 16 .
  • pocket-like axial indentations 22 are introduced both in the valleys 21 between the cutting teeth 16 extending outwards and inwards.
  • the indentations 22 extend radially outwards from the bottom of the valley, deepening so that the cutting ring base body 18 is flattened radially outwards in the valley 21 .
  • the material recesses 20 and valleys 21 are provided on all cutting teeth 16 or between them and can be produced by milling or by a corresponding casting of a metal cutting ring 2 .
  • the outer cutting edge 19 of a valley 21 between two outwardly extending cutting teeth 16 and the inner cutting edge 19 of a valley 21 between two inwardly extending cutting teeth 16 overlap in the axial direction.
  • a cutting angle of the cutting edge 19 flattens out from the cutting ring base body 18 outwards towards a tip of the cutting tooth 16 .
  • a cutting angle of the outer cutting teeth 16 or the outer cutting edges 19 facing the cutting head cutting edges 13 is 55°, the cutting angle of the inner cutting teeth 16 being 52.5° in comparison. In the direction of rotation of the impeller 3, the cutting angle is flatter and is 20° on the outside and 10° on the inside.
  • Each cutting tooth 16 projects outwardly from the cutter ring body 18 at least 17 mm, with the inner cutting teeth 16 extending further axially away from the cutter ring body 16 than do the outer cutting teeth 16 .
  • the cutting teeth 16 are also radially 'sharpened', namely flattened at 37° on the outside and 33° on the inside in relation to the disk-like cutting ring base body 16 towards the opening 17 .
  • other cutting angles and dimensions are conceivable.
  • the cutter head 1 shows a closed two-channel impeller 3 and the cutting head 1 of the pump in a perspective half-open view on the left and in a half-open top view on the right according to the preferred embodiment of the invention.
  • the cutting head 1 is still with the in 4 Impeller 3, not shown, stationary in an axial extension of the same for cooperation with the also in 4 Not shown cutting ring 2 connected.
  • the cutter head 1 is designed with a cutter head base body 8 with the plurality of cutting segments 11 each with cutter head cutting edges 13 running in particular axially for comminuting the solid, the cutter head cutting edges 13 extending radially away from the cutter head base body 8 .
  • the disc-like impeller 3 has, in the usual manner, two snail-like running blades 23, each of which extends from one of the cutting head 1 to a central impeller opening 25 facing leading edge 24 extend to the outer radial edge of the impeller, as in 4 can be seen in particular on the right.
  • the blades 23 are axially bordered on the one hand by a radially extending support disk 26 on the motor side with a hub (not shown) for receiving the motor shaft of the pump and on the other hand on the suction side by a radially extending cover disk 27, so that the axially extending blades 23 between the support disks arranged parallel to one another 26 and cover plate 27 are provided.
  • the impeller 3 On the radially outer edge, the impeller 3 is open radially between the support disk 26, the cover disk 27 and two adjacent blades 23 in the form of a rectangle in a lateral plan view.
  • the cutting head cutting edges 13 are arranged at a distance from the leading edges 24 . Furthermore, the leading edges 24 are spaced radially outwards from the inner edge of the impeller opening 25 . In addition, the cutting head cutting edges 13 are arranged radially ahead of the leading edges 24 in the direction of rotation of the impeller 3, as indicated by the angle ⁇ in 4 indicated on the right. In other words, the leading edges 24 of the impeller 3 and the cutting head cutting edges 13 do not lie on a radial line.
  • the angle ⁇ is, for example, ⁇ 2.5°, 5° or 10°.
  • the cutting head cutting edges 13 and the leading edges 24 extend parallel to one another.
  • the cutting head 1 passed through the impeller opening 25 has four cutting head cutting edges 13 .
  • the shortened cutting segments 11 are provided in front of the blades 23 on the suction side, so that the cutting head cutting edges 13 of the shortened cutting segments 11 are not transferred to the blades 23 .
  • the impeller 3 expediently has four blades 23 .
  • a cylindrical sealing gap (not shown) is provided between the suction side 5 of the impeller 3 and the pump housing 4 for the radial sealing of the impeller 3 .
  • Another seal is formed in which the Cutting ring 2, the impeller 2 to form a conical sealing gap at least partially encloses.
  • Reference List cutting head 1 cutting ring 2 Wheel 3 pump housing 4 suction side 5 cutting head screw 6 cutting ring screw 7 cutting head body 8th drilling 9 peripheral surface 10 cutting segment 11 liquid inlet side 12 cutting head cutting edge 13 side 14 Federation 15 cutting tooth 16 opening 17 cutting ring body 18 cutting edge 19 material recess 20 valley 21 deepening 22 shovel 23 leading edge 24 impeller opening 25 carrier disc 26 cover disk 27

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP22175435.1A 2021-06-24 2022-05-25 Ensemble comprenant une roue motrice et une tête de coupe d'une pompe pour fluide chargé de solide Pending EP4108934A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU102841A LU102841B1 (de) 2021-06-24 2021-06-24 Anordnung umfassend ein Laufrad und einen Schneidkopf für mit Feststoff belastete Flüssigkeit einer Pumpe

Publications (1)

Publication Number Publication Date
EP4108934A1 true EP4108934A1 (fr) 2022-12-28

Family

ID=77431354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22175435.1A Pending EP4108934A1 (fr) 2021-06-24 2022-05-25 Ensemble comprenant une roue motrice et une tête de coupe d'une pompe pour fluide chargé de solide

Country Status (3)

Country Link
EP (1) EP4108934A1 (fr)
CN (1) CN115523153A (fr)
LU (1) LU102841B1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1344944A1 (fr) * 2002-03-14 2003-09-17 KSB Aktiengesellschaft Pompe centrifuge avec un dispositif de broyage
WO2010039858A1 (fr) * 2008-09-30 2010-04-08 The Gorman-Rupp Company Pompe-hachoir
US20130121811A1 (en) * 2011-11-16 2013-05-16 Walter James Cuppetelli Centrifugal chopper pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1344944A1 (fr) * 2002-03-14 2003-09-17 KSB Aktiengesellschaft Pompe centrifuge avec un dispositif de broyage
WO2010039858A1 (fr) * 2008-09-30 2010-04-08 The Gorman-Rupp Company Pompe-hachoir
US20130121811A1 (en) * 2011-11-16 2013-05-16 Walter James Cuppetelli Centrifugal chopper pump

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Publication number Publication date
CN115523153A (zh) 2022-12-27
LU102841B1 (de) 2022-12-27

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