EP3446785B1 - Procédé de traitement d'un liquide chargé des copeaux - Google Patents

Procédé de traitement d'un liquide chargé des copeaux Download PDF

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Publication number
EP3446785B1
EP3446785B1 EP18187895.0A EP18187895A EP3446785B1 EP 3446785 B1 EP3446785 B1 EP 3446785B1 EP 18187895 A EP18187895 A EP 18187895A EP 3446785 B1 EP3446785 B1 EP 3446785B1
Authority
EP
European Patent Office
Prior art keywords
liquid
cutting
pump
chips
cutting assembly
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.)
Active
Application number
EP18187895.0A
Other languages
German (de)
English (en)
Other versions
EP3446785A2 (fr
EP3446785A3 (fr
Inventor
Dirk Wenderott
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.)
Brinkmann Pumpen KH Brinkmann GmbH and Co KG
Original Assignee
Brinkmann Pumpen KH Brinkmann GmbH and Co KG
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 Brinkmann Pumpen KH Brinkmann GmbH and Co KG filed Critical Brinkmann Pumpen KH Brinkmann GmbH and Co KG
Publication of EP3446785A2 publication Critical patent/EP3446785A2/fr
Publication of EP3446785A3 publication Critical patent/EP3446785A3/fr
Application granted granted Critical
Publication of EP3446785B1 publication Critical patent/EP3446785B1/fr
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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
    • 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
    • F04D29/181—Axial flow rotors
    • 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

Definitions

  • the invention relates to a method for treating a chip-loaded liquid in a collecting basin, the liquid being sucked from the bottom of the collecting basin by means of a cutting mechanism which is immersed in the liquid and has a rotating cutting wheel.
  • the invention is concerned with a method for treating cooling lubricant emulsions which are used in machine tools for cooling and lubricating the tools and workpieces.
  • the cooling lubricant emulsion running off the tool and the workpiece in the machining zone of a machine tool is collected and passed into a collecting basin, from which it is then sucked off with the aid of a cooling lubricant pump and then filtered and returned to the machining zone.
  • the cooling lubricant emulsions are often contaminated with metal chips that have arisen in the machining process and then reach the collecting basin with the collected liquid.
  • the object of the invention is to avoid malfunctions in systems in which a chip-laden liquid is collected in a collecting basin and pumped out again, even in the event of a large amount of chips.
  • this object is achieved in that, after the chips have been comminuted, the liquid is returned to the collecting basin with the cutting device.
  • the function of comminuting the chips is thus separated from the function of pumping the liquid out of the collecting basin.
  • the cutting unit reduces the amount of coarse chips in the liquid and thus relieves the actual suction pump. This has the advantage that malfunctions when the chips are shredded, for example due to an overload of the cutting unit, do not directly impair the function of the pump, so that the machine tool can continue to operate undisturbed.
  • the size reduction can be adapted to the respective amount of chips.
  • Another advantage is that the size of the chips returned to the tool with the emulsion does not depend on the current delivery rate of the pump, but is controlled via the size reduction rate of the cutting pump and the operating time of this pump and, for example, with the help of a sieve at the inlet of the delivery pump can be limited.
  • the invention also relates to a cutting mechanism which is designed to carry out the method described above.
  • the method according to the invention can also be carried out with a conventional pump with an integrated cutting unit, by connecting a valve arrangement to the pressure port of the pump, with which the liquid is optionally returned to the filter and then to the processing zone of the machine tool or is returned directly to the collecting basin .
  • the pump can then be used to shred chips "in stock" with the aid of the cutting unit.
  • a peripheral region of a collecting basin 10 is shown in a vertical section, which serves, for example, for collecting cooling lubricant emulsion in the machine bed of a machine tool, not shown.
  • the collecting basin 10 has a bottom 12 and a side wall 14 and is filled to a certain level with a liquid 16 (cooling lubricant emulsion). If the fill level exceeds an upper limit value, liquid is drawn off with the aid of a cooling lubricant pump (not shown) and returned to the machining zone of the machine tool via a filter.
  • a cutting mechanism 18 is arranged in the collecting basin 10, which serves to shred chips, in particular metal chips, that have arisen during the machining process with the machine tool and have reached the collecting basin 10 with the liquid 16 and then predominantly settle the bottom 12 of the collecting basin.
  • the cutting device 18 is mounted on a lower end of a motor housing 20, which is arranged for the most part outside of the collecting basin 10 and receives a motor, not shown, which drives a motor shaft 22 which is rotatably mounted in the motor housing.
  • the cutting unit 18 has a cutting unit housing 24, which is immersed in the liquid 16 and forms a vertical, downwardly opening suction nozzle 26 in the lower region, to which a pump chamber 28 with a larger diameter adjoins at the top.
  • a radial impeller 30 is arranged on the motor shaft 22 within the pump chamber 28 and a cutting wheel 32 is arranged inside the intake port 26, which is designed here as an axial impeller.
  • the intake port 26 is closed at the bottom by a cutting plate 34 which forms a plurality of inlet openings through which the liquid 16 can enter the intake port 26.
  • Radially running edges at the lower ends of the wings of the cutting wheel 32 are designed as cutting edges, and Radial webs of the cutting plate 34, which separate the inlet openings from one another, form counter-knives over which the cutting edges of the cutting wheel 32 move so that a shearing effect is achieved.
  • the cutting edges of the cutting wheel 32 or the counter knives can optionally be serrated.
  • An extension 36 of the motor shaft 22 protrudes downward out of the cutter housing 24 and carries at the lower end a pre-shredder 38 with two radial vanes which move close above the bottom 12 of the collecting basin and are inclined in such a way that they move upwards in the liquid generate directed flow to the intake port 26.
  • the pump chamber 28 is connected at its outer circumferential edge to a plurality of outlet channels 40 distributed over the circumference, which open into the collecting basin 10 on the underside of the cutter housing 24.
  • the suction pump can have its own cutting unit, which in principle is the has the same structure as the cutting unit 18 shown here, so that overall a greater size reduction capacity is available.
  • a solution is preferred in which only the size of the passed chips is limited in the suction pump, for example with the aid of a sieve.
  • the pre-shredder 38, the cutting wheel 32 designed as an axial impeller and the radial impeller 30 generate a circulating flow in the liquid 16 which is directed radially to the axis of the motor shaft 22 near the bottom of the collecting basin 10, so that also chips which are at a greater distance from it
  • the radial impeller 30 can be omitted.
  • the liquid 16 then circulates more slowly through the cutting mechanism, so that fewer chips per unit of time are fed to the cutting wheel 32, while on the other hand practically the entire torque of the motor is available for comminuting the chips.
  • This variant is therefore particularly suitable for applications with very thick or hard and therefore difficult to shred chips.
  • Fig. 2 the lower end of a known suction pump for cooling lubricants is shown in an axial section, into which a cutting mechanism 18 'is integrated.
  • the cutting mechanism 18 ' has the same structure as the cutting mechanism 18 described above, with the difference that there are no outlet channels on the outer circumference of the pump chamber 28 which lead directly back into the interior of the collecting basin.
  • the pump chamber 28 is connected on the outer circumference of its upper side to a spiral housing 44 which opens into a pressure port 46.
  • the engine case 20 after Fig. 1 is replaced here by a pump housing 20 ', which receives the drive motor of the pump and also forms the pressure port 46.
  • a valve arrangement 48 which is shown only schematically here and has two check valves 50, 52, is connected to the pressure port 46.
  • the check valve 50 is arranged in a line 54 which leads to the machining zone of the machine tool via a filter, not shown.
  • the valve 52 is arranged in a branch line 56, which branches off from the line 54 or from the pressure connection and leads back into the collecting basin 10.
  • the check valves 50, 52 can be switched electronically, for example.
  • the check valve 50 In normal pump operation, the check valve 50 is open and the check valve 52 is closed. However, if no cooling lubricant emulsion is to be pumped because there is no need in the processing zone or because the fill level in the collecting basin is too low, the pump operation is continued and only the shut-off valve 50 is closed and instead the shut-off valve 52 is opened so that the liquid is similar as in Fig. 1 circulates in a closed circuit, the chips being shredded by the cutter 18 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (5)

  1. Procédé destiné à traiter un liquide chargé de copeaux (16) dans un bac de collecte (10), dans lequel le liquide (16) est aspiré à partir du fond (12) du bac de collecte (10) au moyen d'un mécanisme tranchant (18 ; 18') comportant une roue tranchante rotative (32) immergée dans le liquide, caractérisé en ce que le liquide est directement réintroduit dans le bac de collecte après broyage des copeaux avec le mécanisme tranchant.
  2. Mécanisme tranchant (18) destiné à mettre en œuvre le procédé selon la revendication 1, comportant un boîtier de mécanisme tranchant (24) qui est configuré pour être immergé dans le liquide et qui forme une tubulure d'aspiration (26) qui reçoit une roue tranchante (32) pouvant être entraînée par un arbre de moteur (22), dans lequel la roue tranchante (32) et/ou un rotor spécial (30) sont configurés pour créer un effet d'aspiration dans la tubulure d'aspiration (26) de manière à aspirer le liquide (16), caractérisé en ce que dans le boîtier de mécanisme tranchant (24), au moins un canal de sortie part du côté de sortie d'écoulement (40) de la tubulure d'aspiration (26) pour retourner au côté d'entrée d'écoulement de cette tubulure d'aspiration et est configuré de manière à renvoyer directement dans le bac de collecte (10) le liquide aspiré par la tubulure d'aspiration (26).
  3. Mécanisme tranchant selon la revendication 2, dans lequel la roue tranchante (32) est formée comme un rotor de pompe, en particulier un rotor axial.
  4. Mécanisme tranchant selon la revendication 2 ou 3, dans lequel un rotor radial (30) est agencé sur l'arbre de moteur (22) dans une chambre de pompe (28) qui est reliée au au moins un canal de sortie (40) au niveau de la circonférence extérieure.
  5. Mécanisme tranchant selon l'une des revendications 2 à 4, dans lequel sur une extension (36) de l'arbre de moteur (22) faisant saillie à partir du boîtier de mécanisme tranchant (24) est agencé un pré-broyeur (38) qui se trouve juste au-dessus du fond (12) du bac de collecte (10) lorsque le mécanisme tranchant est dans la position montée.
EP18187895.0A 2017-08-21 2018-08-08 Procédé de traitement d'un liquide chargé des copeaux Active EP3446785B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017119019.8A DE102017119019A1 (de) 2017-08-21 2017-08-21 Verfahren zum Behandeln einer spänebelasteten Flüssigkeit

Publications (3)

Publication Number Publication Date
EP3446785A2 EP3446785A2 (fr) 2019-02-27
EP3446785A3 EP3446785A3 (fr) 2019-04-03
EP3446785B1 true EP3446785B1 (fr) 2020-03-25

Family

ID=63174036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18187895.0A Active EP3446785B1 (fr) 2017-08-21 2018-08-08 Procédé de traitement d'un liquide chargé des copeaux

Country Status (4)

Country Link
US (1) US20190055955A1 (fr)
EP (1) EP3446785B1 (fr)
JP (1) JP2019035407A (fr)
DE (1) DE102017119019A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110159551B (zh) * 2019-06-12 2021-01-01 华南泵业(赣州)有限公司 一种多级切割高效潜污泵
CN116241498A (zh) * 2023-04-17 2023-06-09 四川省机械研究设计院(集团)有限公司 一种切割式无过载叶轮

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1131953B (de) * 1958-06-07 1962-06-20 Ewald Burger Sandschutzglocke fuer Wanddurchfuehrungen von unter Wasser laufenden Wellen, insbesondere von Kreiselpumpen
US3325107A (en) * 1964-01-16 1967-06-13 Ultra Inc Disintegrator pump
DE4423149C2 (de) * 1994-07-04 1998-01-29 Orpu Gmbh Mehrstufige Freistrompumpe
US7967553B2 (en) 2004-12-03 2011-06-28 Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg Pump with cutting impeller
DE102005014348B3 (de) 2005-03-24 2006-08-10 Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg Pumpe mit Schneidlaufrad und Vorzerkleinerer
DE102008031842B3 (de) * 2008-07-05 2010-03-04 Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg Pumpe mit Schneidlaufrad und Vorzerkleinerer
DE202008010817U1 (de) * 2008-08-05 2008-10-16 Burgmann Industries Gmbh & Co. Kg Pumpenanordnung mit Zyklonabscheider
MX389905B (es) * 2013-08-01 2025-03-19 Bjm Pumps Llc Bomba cortadora y trituradora.
DE202013103972U1 (de) 2013-09-04 2014-12-15 Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg Pumpe mit Schneidrad und Vorzerkleinerer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
JP2019035407A (ja) 2019-03-07
EP3446785A2 (fr) 2019-02-27
EP3446785A3 (fr) 2019-04-03
US20190055955A1 (en) 2019-02-21
DE102017119019A1 (de) 2019-02-21

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