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EP3548749A1 - Pompe sécatrice dotée d'unité de coupe à assemblage rapide et de rotor - Google Patents

Pompe sécatrice dotée d'unité de coupe à assemblage rapide et de rotor

Info

Publication number
EP3548749A1
EP3548749A1 EP17817150.0A EP17817150A EP3548749A1 EP 3548749 A1 EP3548749 A1 EP 3548749A1 EP 17817150 A EP17817150 A EP 17817150A EP 3548749 A1 EP3548749 A1 EP 3548749A1
Authority
EP
European Patent Office
Prior art keywords
impeller
cutting blade
cutting
shaft
pump
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.)
Granted
Application number
EP17817150.0A
Other languages
German (de)
English (en)
Other versions
EP3548749B1 (fr
EP3548749C0 (fr
Inventor
Emiliano CONFORTO
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.)
Dreno Pompe Srl
Original Assignee
Dreno Pompe Srl
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 Dreno Pompe Srl filed Critical Dreno Pompe Srl
Publication of EP3548749A1 publication Critical patent/EP3548749A1/fr
Application granted granted Critical
Publication of EP3548749B1 publication Critical patent/EP3548749B1/fr
Publication of EP3548749C0 publication Critical patent/EP3548749C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
    • 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
    • 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
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/622—Adjusting the clearances between rotary and stationary parts
    • 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
    • B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
    • B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
    • B02C2201/063—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage for waste water or sewage

Definitions

  • the present patent concerns cutter pumps, and in particular it concerns a cutter pump with quick-assembly cutting unit and impeller.
  • These pumps commonly called cutter pumps, are equipped with a cutting unit which is installed on the suction side of the pump and serves the function of cutting the solid materials contained in the liquid in order to reduce said solid material to such a size as to allow it to pass through the pump without causing any clogging.
  • the cutting unit is constituted by a rotary cutting blade, which is mounted so that it is coaxial with the impeller of the pump and rotates together with it, and a cutting plate which is fixed with respect to the pump body and is mounted between the cutting blade and the impeller, and wherein the cutting interface is defined between said rotary cutting blade and said cutting plate.
  • the liquid to be transported flows according to an axial suction direction, passes through the cutting unit and then is discharged through the outlet duct in radial direction.
  • the cutting efficiency is determined by the clearance between the cutting blade and the cutting plate.
  • Several types of cutter pump are known, which are provided with devices suited to adjust said clearance and lock the cutting unit in the desired position.
  • pumps are known where said adjustment takes place during the assembly phase, through the insertion of spacer washers in the driving shaft, between the impeller and the cutting blade, and the successive adjustment of the position of the cutting plate with respect to the pump body.
  • the correctness of this adjustment operation depends on the skills and expertise of the operator and cannot be reproduced exactly.
  • cutter pumps of the type described in patent EP2147213 are also known, in which said adjustment operation is carried out by means of additional threaded screws inserted in the correspondingly threaded end of the shaft, upstream of the cutting blade with respect to the suction direction, and in which said cutting blade is in turn screwed onto the driving shaft.
  • the driving shaft in particular, is made up of two portions that can be screwed onto each other, wherein one portion is mechanically fitted into a blind hole provided in said impeller, while the other portion is threaded externally, so that it can be engaged into a correspondingly threaded through axial opening provided in said cutting blade.
  • the main object of the present invention is to improve the known cutter pumps by simplifying and quickening the assembly of the cutter unit, in addition to reducing the number of its components.
  • the new cutter pump comprises a pump body, an impeller mounted on a driving shaft and rotating inside a housing created in said pump body and a cutting unit mounted so that it is coaxial with said impeller.
  • Said cutting unit comprises a rotary cutting blade, mounted in such a way that it is coaxial with said impeller and rotates together with it, being conveniently mounted on the same shaft as said impeller, and a cutting plate rigidly mounted on the pump body, and wherein said rotary cutting blade and said non-rotating cutting plate cooperate with each other and define the cutting interface.
  • Said cutting plate mounted between said impeller and said cutting blade, comprises a centre opening at the level of the impeller shaft and is rigidly constrained to the pump body, for example bolted onto it.
  • Said impeller and said cutting blade are both constrained to said shaft so that they rotate integrally with it, for example and conveniently through a mechanical connection with at least one fixing tab or key.
  • the new pump is provided with at least one self-locking nut suited to be screwed to the end of the shaft that projects from the cutting blade upstream of the latter with respect to the liquid suction direction.
  • said cutting plate in order to regulate the cutting efficiency, can be translated axially, so that it is possible to vary its distance from said cutting blade, while on the other hand the position of the latter with respect to the impeller cannot be changed.
  • Figure 1 shows a longitudinal axial section view of the pump (10) when it is completely assembled.
  • Figure 2 shows part of a further longitudinal axial section view, different from the previous one, of the pump (10) when it is completely assembled.
  • Figure 3 shows a view of the suction side of the pump (10) when it is completely assembled.
  • the new cutter pump (10) comprises a pump body (14) provided with at least one housing (11) with an impeller (20) rotating therein.
  • Said impeller (20) is mounted on a driving shaft (30) and rotates around the axis (X) of the shaft (30) inside said housing (11) created in said pump body (14).
  • said impeller (21) comprises a through axial opening (21) suitable for the insertion of said shaft (30).
  • Said housing (11) comprises a suction intake (12) which is substantially axial with respect to the impeller (20) and an outlet (13) intended to discharge the fluid in a substantially radial direction.
  • the transported liquid thus flows in axial direction during the suction phase and in radial direction during the delivery phase.
  • a cutting unit (40) is mounted coaxially with said impeller (30), upstream of said suction intake (12), so that the liquid to be transported flows through it before reaching said housing (11).
  • Said cutting unit (40) comprises a rotary cutting blade (50) mounted on said driving shaft (30) in such a way that it is coaxial with said impeller (20) and rotates together with it.
  • Said cutting blade (50) comprises a through axial opening (51) suitable for the insertion of the driving shaft (30) and one or more substantially radial cutting elements (52).
  • Said cutting unit (40) comprises also a cutting plate (60) mounted between said impeller (20) and said cutting blade (50) and rigidly constrained to the pump body (14), for example bolted onto the latter (62).
  • Said cutting plate (60) comprises a centre opening (61) and the driving shaft (30) passes through the latter.
  • Said cutting blade (50) rotates with respect to said cutting plate (60), and said cutting blade (50) and said cutting plate (60) cooperate with each other defining the cutting interface (T) through which the liquid flows and in which the solid elements transported by the liquid are cut.
  • Said impeller (20) and said cutting blade (50) are constrained to said shaft (30) in such a way that they rotate integrally with it and with each other, for example and conveniently through the same fixing tab or key (32).
  • said impeller (20) and said cutting blade (50) are mechanically connected to each other and to said shaft (30) through a single tab (32) inserted between said shaft (30) and said axial non-threaded openings (21, 51) of said impeller (20) and of said cutting blade (50).
  • said impeller (20), said cutting blade (50) and said shaft (30) make up a single body.
  • said cutting blade (50) and said impeller (20) are maintained in contact with and abutting against each other through said opening (61) created in said cutting plate (60), thanks to the tightening force of said nut (70).
  • said impeller (20) comprises an annular portion (22) in which said shaft (30) is inserted and which projects from the impeller (20) towards said cutting blade (50), and wherein said annular portion (22) of the impeller (20) is maintained in contact with said cutting blade (50).
  • Said cutting blade (50) conveniently comprises an annular portion (53) in which said shaft (30) is inserted and which projects from said cutting blade (50) towards said impeller (20), and wherein said annular portion (53) of the cutting blade (50) is maintained in contact with said annular portion (22) of the impeller (20).
  • said cutting plate (60) can be moved axially in such a way as to adjust its distance from said cutting blade (50), which instead remains constrained to said shaft (30) and to said impeller (20) in a fixed manner.
  • said pump body (14) comprises at least one fixed portion (16) and at least one adjusting portion (15) to which said cutting plate (60) is rigidly constrained, for example through fixing means (62).
  • Said adjusting portion (15) can be rigidly constrained to said fixed portion (16) through fixing means (151), wherein adjustable spacer elements are positioned between said fixed portion (16) and said adjusting portion (15), for example one or more threaded dowels (17) which are distributed homogeneously and engaged in correspondingly threaded seats (152) created in said adjusting portion (15).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Food Science & Technology (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une pompe sécatrice comprenant un rotor (20) monté sur un arbre d'entraînement (30), une lame de coupe rotative (50) montée coaxiale au rotor (20) et tournant avec ce dernier, et une plaque de coupe (60) fixée sur le corps de pompe (14) et définissant l'interface de coupe (T) conjointement avec la lame de coupe (50). La lame de coupe (50) comprend une ouverture axiale traversante (51) sans filetage et adaptée à l'introduction de l'arbre (30), et la lame de coupe (50) et le rotor (20) sont reliés mécaniquement à l'arbre (30) au moyen d'au moins une languette (32), afin de pouvoir tourner d'un seul tenant l'une avec l'autre et avec l'arbre (30) lui-même.
EP17817150.0A 2016-12-02 2017-11-28 Pompe sécatrice dotée d'unité de coupe à assemblage rapide et de rotor Active EP3548749B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000122865A IT201600122865A1 (it) 2016-12-02 2016-12-02 Pompa trinciatrice con gruppo di taglio e girante ad assemblaggio rapido
PCT/IB2017/057445 WO2018100488A1 (fr) 2016-12-02 2017-11-28 Pompe sécatrice dotée d'unité de coupe à assemblage rapide et de rotor

Publications (3)

Publication Number Publication Date
EP3548749A1 true EP3548749A1 (fr) 2019-10-09
EP3548749B1 EP3548749B1 (fr) 2024-04-10
EP3548749C0 EP3548749C0 (fr) 2024-04-10

Family

ID=58402042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17817150.0A Active EP3548749B1 (fr) 2016-12-02 2017-11-28 Pompe sécatrice dotée d'unité de coupe à assemblage rapide et de rotor

Country Status (3)

Country Link
EP (1) EP3548749B1 (fr)
IT (1) IT201600122865A1 (fr)
WO (1) WO2018100488A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2971520B1 (fr) 2013-03-15 2022-02-23 Pentair Pump Group, Inc. Ensemble de lame de coupe
WO2017189741A1 (fr) 2016-04-26 2017-11-02 Pentair Flow Technologies, Llc Ensemble de coupe pour une pompe hacheuse
US11161121B2 (en) 2019-05-10 2021-11-02 Jung Pumpen Gmbh Cutting blade assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930587U (ja) * 1982-08-20 1984-02-25 株式会社鶴見製作所 水中ポンプにおける夾雑物の切断機構
JPH0636315Y2 (ja) * 1988-06-14 1994-09-21 三和特珠製綱株式会社 カッター付き渦巻ポンプ
JP2843270B2 (ja) * 1994-11-14 1999-01-06 小松ゼノア株式会社 破砕ポンプ
FR3006721A1 (fr) * 2013-06-10 2014-12-12 Ksb Sas Pompe dileceratrice a moyens de reglage

Also Published As

Publication number Publication date
EP3548749B1 (fr) 2024-04-10
WO2018100488A1 (fr) 2018-06-07
IT201600122865A1 (it) 2018-06-02
EP3548749C0 (fr) 2024-04-10

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