EP3446785A2 - 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
EP3446785A2
EP3446785A2 EP18187895.0A EP18187895A EP3446785A2 EP 3446785 A2 EP3446785 A2 EP 3446785A2 EP 18187895 A EP18187895 A EP 18187895A EP 3446785 A2 EP3446785 A2 EP 3446785A2
Authority
EP
European Patent Office
Prior art keywords
liquid
cutting
pump
chips
collecting basin
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
EP18187895.0A
Other languages
German (de)
English (en)
Other versions
EP3446785A3 (fr
EP3446785B1 (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
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 reservoir.
  • the invention is concerned with a method of treating coolant lubricant emulsions used in machine tools for cooling and lubricating the tools and workpieces.
  • the running in the processing zone of a machine tool from the tool and the workpiece cooling lubricant emulsion is collected and passed into a reservoir from which it is then sucked with the aid of a coolant lubricant pump and then filtered and returned to the processing zone.
  • the coolant emulsions are contaminated with metal shavings, which have arisen during the machining process and then reach the sump with the collected liquid.
  • the object of the invention is, in systems in which a chip-loaded liquid is collected in a reservoir and pumped out again, to avoid malfunctioning even with heavy chips accumulation.
  • This object is achieved in that the liquid is sucked by means of a dipping into the liquid, having a rotating cutting wheel having cutting unit from the bottom of the collecting basin and returned after crushing of the chips with the cutting immediately back into the reservoir.
  • the function of crushing the chips is separated from the function of pumping the liquid from the reservoir.
  • 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 in the chipping of the chips, for example due to overloading of the cutting mechanism, do not directly affect the function of the pump, so that the operation of the machine tool can continue undisturbed.
  • the crushing capacity can be adapted to the respective chip accumulation.
  • Another advantage is that the size of the returned to the tool with the emulsion chips is not dependent on the instantaneous flow rate of the pump, but on the crushing capacity of the cutting pump and the operating time of this pump controlled and with eg using a sieve at the inlet of the feed pump can be limited.
  • the invention is also a cutting unit, which is designed for carrying out the method described above.
  • the method according to the invention can also be carried out with a conventional pump with integrated cutting device by connecting to the discharge nozzle of the pump a valve arrangement with which the liquid is selectively returned to the filter and then to the processing zone of the machine tool or directly returned to the reservoir , During operation, when the tool does not require a coolant emulsion and the pump normally stops, the pump can then be used to shred chips "in stock" using the cutter.
  • This also has the advantage that in the phases in which no coolant lubricant emulsion is needed or the liquid reaches its minimum level in the reservoir, so that no further liquid should be pumped, the pump operation can be continued, so that long downtime and frequent Switching the pump on and off and the associated problems are avoided.
  • Fig. 1 is shown in a vertical section, an edge region of a collecting basin 10, which serves for example for collecting cooling lubricant emulsion in the machine bed of a machine tool, not shown.
  • the reservoir 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 level exceeds an upper limit, liquid is sucked by means of a coolant lubricant pump, not shown, and returned via a filter to the processing zone of the machine tool.
  • a cutting unit 18 is arranged in the reservoir 10, which serves to shred chips, especially metal chips, which have arisen in the machining process with the machine tool and have entered the reservoir 16 with the liquid 16 and then mainly on settle the bottom 12 of Sammelbeckens.
  • the cutter 18 is mounted at a lower end of a motor housing 20 which is located mostly outside of the collecting basin 10 and further receives above a motor, not shown, which drives a rotatably mounted in the motor housing motor shaft 22.
  • the cutter 18 has a cutter housing 24 which dips into the liquid 16 and at the bottom of a vertical, downwardly opening intake manifold 26 forms, to which a pump chamber 28 connects with a larger diameter upwards.
  • a radial impeller 30 and within the intake manifold 26 a cutting wheel 32 is disposed within the pumping chamber 28, which is designed here as Axiallaufrad.
  • the intake manifold 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 manifold 26.
  • Radially extending edges at the lower ends of the blades of the cutting wheel 32 are formed as cutting, and Radial ridges of the cutting plate 34 which separate the inlet openings form counter-blades over which the cutting edges of the cutting wheel 32 move in such a way that a shearing action is achieved.
  • the cutting edges of the cutting wheel 32 or the counter blades may be serrated.
  • An extension 36 of the motor shaft 22 protrudes downward from the cutter housing 24 and carries at the lower end of a pre-shredder 38 with two radial wings, which move just above the bottom 12 of the collecting basin and are adjusted obliquely so that they are in the liquid an upward directed flow to the intake manifold 26 towards produce.
  • the pump chamber 28 is connected at its outer peripheral edge with a plurality of circumferentially distributed outlet channels 40 which open at the bottom of the cutting unit housing 24 in the reservoir 10.
  • the suction pump may have its own cutting, which in principle the the same structure has as the cutting unit 18 shown here, so that a total of a larger crushing capacity is available.
  • a solution is preferred in which in the suction pump, only the size of the transmitted chips is limited, for example by means of a sieve.
  • the pre-shredder 38, the cutting wheel 32 formed as Axiallaufrad and the radial impeller 30 generate in the liquid 16 a circulating flow, which is directed near the bottom of the collecting basin 10 radially to the axis of the motor shaft 22, so that also chips which are located at a greater distance to the Cutting unit 18 have settled on the bottom 12 of the collecting basin, are transported into the catchment area of the pre-shredder 38. It is in particular the coarser and heavier chips that are transported in this way to the cutting unit, while the already crushed finer chips settle more slowly and therefore remain longer in the liquid 16 above the bottom 12 in suspension.
  • the radial impeller 30 may be omitted.
  • the liquid 16 then circulates more slowly through the cutter, so that less chips are fed per unit of time to the cutting wheel 32, while on the other hand practically all the torque of the motor is available for the cutting of the chips.
  • This variant is therefore particularly suitable for applications with very thick or hard and therefore difficult to crush chips.
  • Fig. 2 is shown in an axial section, the lower end of a known suction pump for cooling lubricants, in which a cutting unit 18 'is integrated.
  • the cutter 18 ' has in principle the same structure as the cutter 18 described above, only with the difference that on the outer circumference of the pump chamber 28 no outlet channels are arranged, which lead back directly into the interior of the collecting basin. Instead, the pump chamber 28 is connected to the outer periphery of its upper side with a spiral housing 44, which opens into a discharge nozzle 46.
  • the motor housing 20 after Fig. 1 is here replaced by a pump housing 20 ', which receives the drive motor of the pump and also forms the discharge port 46.
  • a valve assembly 48 is shown here only schematically connected, the two check valves 50, 52 has.
  • the check valve 50 is arranged in a line 54 which leads via a filter, not shown, to the processing zone of the machine tool.
  • the valve 52 is arranged in a branch line 56, which branches off from the line 54 or from the discharge nozzle and returns it to the collecting basin 10.
  • the check valves 50, 52 are electronically switchable, for example.
  • the check valve 50 In normal pumping operation, the check valve 50 is opened and the check valve 52 is closed. However, if no coolant emulsion is to be delivered, because there is no need in the processing zone, or because the fill level in the sump is too low, then pumping will continue and only the check valve 50 will be closed, and instead the check valve 52 will open, making the liquid similar as in Fig. 1 circulated in a closed circuit, wherein the chips are comminuted by the cutting unit 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)
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 true EP3446785A2 (fr) 2019-02-27
EP3446785A3 EP3446785A3 (fr) 2019-04-03
EP3446785B1 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
KR101206846B1 (ko) 2004-12-03 2012-11-30 브링크만 펌펜 카.하. 브링크만 게엠베하 운트 코.카게 절단 임펠러를 가진 펌프
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
CA2918887C (fr) * 2013-08-01 2016-06-07 Bjm Pumps Llc Pompe a dechiqueter et a cisailler
DE202013103972U1 (de) 2013-09-04 2014-12-15 Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg Pumpe mit Schneidrad und Vorzerkleinerer

Also Published As

Publication number Publication date
EP3446785A3 (fr) 2019-04-03
JP2019035407A (ja) 2019-03-07
DE102017119019A1 (de) 2019-02-21
US20190055955A1 (en) 2019-02-21
EP3446785B1 (fr) 2020-03-25

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