EP0009467A2 - Magnetic filter - Google Patents

Magnetic filter Download PDF

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Publication number
EP0009467A2
EP0009467A2 EP79810096A EP79810096A EP0009467A2 EP 0009467 A2 EP0009467 A2 EP 0009467A2 EP 79810096 A EP79810096 A EP 79810096A EP 79810096 A EP79810096 A EP 79810096A EP 0009467 A2 EP0009467 A2 EP 0009467A2
Authority
EP
European Patent Office
Prior art keywords
magnetic
magnetic filter
roller
jacket
filter according
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
EP79810096A
Other languages
German (de)
French (fr)
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EP0009467B1 (en
EP0009467A3 (en
Inventor
Hans Streuli
Joseph Rüedi
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.)
Hans Streuli AG
Streuli Hans AG
Original Assignee
Hans Streuli AG
Streuli Hans AG
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Filing date
Publication date
Application filed by Hans Streuli AG, Streuli Hans AG filed Critical Hans Streuli AG
Priority to AT79810096T priority Critical patent/ATE237T1/en
Publication of EP0009467A2 publication Critical patent/EP0009467A2/en
Publication of EP0009467A3 publication Critical patent/EP0009467A3/en
Application granted granted Critical
Publication of EP0009467B1 publication Critical patent/EP0009467B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/28—Magnetic plugs and dipsticks
    • B03C1/284—Magnetic plugs and dipsticks with associated cleaning means, e.g. retractable non-magnetic sleeve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • B03C1/12—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with magnets moving during operation; with movable pole pieces
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0058—Working-up used lubricants to recover useful products ; Cleaning by filtration and centrifugation processes; apparatus therefor

Definitions

  • the invention relates to a magnetic filter, consisting of a magnetic roller rotatably mounted in a housing with a scraper, which is enveloped at the bottom by a jacket, wherein a flow channel for the medium to be filtered is formed between the roller and the jacket.
  • the magnetic filter is used to remove magnetically conductive and non-conductive dirt particles from coolants and lubricants so that they can be reused.
  • the degree of cleanliness of the coolants and lubricants is a decisive factor in the manufacturing precision and the surface quality of the machined machine parts. A Improving the quality of the magnetic filter leads to an increase in the service life of tools, system parts and the lubricants and coolants.
  • Magnetic induction decreases as the distance between the magnets and the individual chip increases. Mainly the smallest chips that are on the outside, i.e. furthest away from the roller surface, flowing in the medium to be cleaned in the channel, do not have enough time during the flow to reach the magnetic surface of the roller.
  • this object is achieved in such a way that the flow channel cross section can be changed.
  • at least part of the casing is advantageously designed to be movable.
  • a slide valve could also be provided which penetrates the flow channel in a controllable manner.
  • a reduction in the channel cross section results in an increase in the flow resistance, resulting in a backflow, see above that even with small quantities, the level and thus the flow characteristics of the filter correspond approximately to that of the full load quantity.
  • the magnetic filter has a control arrangement with an electrical signal transmitter, which switches the drive motor of the magnetic roller on and off as a function of the liquid level.
  • the filter efficiency can be optimally adapted automatically to the operating conditions and the physical properties of the lubricating and cooling liquids.
  • the magnetic filter has a stable aluminum housing 1, in which a horizontal magnetic roller 2 is rotatably mounted.
  • the roller 2 is constructed from fine-pole, powerful permanent magnets, which are arranged at narrow intervals and generate a strong magnetic field across the entire width of the roller.
  • the roller drive takes place via a double worm gear 4 by an electric motor 3.
  • a curved sheet metal jacket 5 is arranged below the magnetic roller 2, at a distance a from its surface, which envelops the lower part of the roller 2.
  • a flow channel 6 for the liquid to be filtered is formed between the roll surface and the sheet metal jacket 5.
  • the sheet metal jacket 5 consists of a part 5a fixed to the housing and a pivotable part 5b, the latter being fastened to the fixed part 5a by means of a hinge 8 parallel to the roller axis 7.
  • the jacket could also consist of two cast parts.
  • a handle 9 which is arranged outside the housing 1 and which is connected to the adjustable part 5b via two articulated levers 10, 11, is used to adjust the pivotable jacket part 5b.
  • both jacket parts Sa, 5b are arranged coaxially with the magnetic roller 2.
  • the movable jacket part Sb can now be adjusted by means of the handle 9 in such a way that the gap narrows continuously in the direction of flow, a flow cross section tapering in the form of a wedge being formed in the region of the movable jacket part 5b.
  • This setting of the movable jacket part is shown in dashed lines in the figures, with the handle 9 alternatively being able to be arranged on one or the other side of the housing.
  • a known, inclined scraper plate 14 is attached to the top of the housing 1 and lies with its front edge 15 on the roller surface.
  • a pre-filtering chamber 13 made of aluminum is arranged in front of the magnetic roller, in which a dirt discharge basket can be used.
  • the sloping baffle 16 in the prefiltration chamber 13 serves to calm the inflowing liquid.
  • the medium to be filtered has to flow into the flow channel 6 in a laminar manner and evenly distributed over the entire width, since turbulence affects the filter efficiency. Due to the calming in the prefiltration chamber 13, a certain sedi takes place mentation instead, especially heavy parts such as grinding wheel abrasion, chips, etc. are deposited.
  • the dirt discharge basket is an important cleaning aid, since sedimentation can be removed quickly and easily using this basket; time-consuming cleaning is spared.
  • the medium flows out of the antechamber 13 through the baffle 16 and then smoothly under the magnetic roller 2.
  • the flow gap can now be narrowed more or less in a wedge shape in the direction of flow, as required.
  • the larger iron particles are excreted first and the effectiveness of the filtration in the micron range in the constricted areas is significantly increased.
  • the outflow can be backed up to the inlet height by a riser pipe or by increasing the adjustable baffles.
  • the adjustable scraper plate 14 is arranged to rise slightly. The dirt is pushed further and further back on the scraper plate and then falls largely dry into a designated dirt container.
  • a filter system can be immediately adapted to a changed operating condition or application. In this way, iron particles are practically always completely and, thanks to the wetting effect, non-ferrous substances largely removed continuously from the coolant and lubricant (oils, water, emulsions).
  • the magnetic filter can be provided with an electronic control for the drive.
  • this enables the system to be operated as a precoat filter, that is, filtering out non-magnetizable material.
  • a capacitive compact limit switch 17 projects with its measuring parts 18 into the liquid in the pre-filtering chamber 13. It is designed for fine regulation and responds to the smallest changes in the flow resistance or the liquid level and automatically switches the drive motor 3 on and off in a narrow control band. This eliminates the need for any manual re-regulation when changing the degree of contamination of the liquid to be filtered.
  • the basic mode of operation corresponds to that of the magnetic filter without signal transmitter, only the magnetic roller does not turn when it is started up.
  • the magnetizable parts immediately build into one beard-shaped sieve in the flow wedge, which leads directly to the floating of non-magnetizable parts and thus forms a tight filter layer.
  • the degree of filtering can be infinitely adjusted in the capacitive compact limit switch. If the flow resistance in the filter exceeds the predetermined value, a control command triggers a forward rotation of the magnetic roller. If a small part of the filter layer is discharged, the flow resistance is reduced, the motor is switched off and the magnetic roller turns tight again.
  • This modern type of electronic capacitive control can work in a narrow control band with short cycle intervals in order to keep the filter efficiency always within narrow limits.
  • the belt can also be moved up or down almost as you like.
  • the measuring point can be inside or outside the filter housing, depending on the medium.
  • an electrically magnetizable roller is provided instead of the magnetic roller.
  • a slide regulatingly penetrate into the channel with a fixed jacket instead of the electrical signal transmitter, a membrane switch or a proximity switch could also be used, which control the electric motor as a function of the liquid level. Depending on the type of medium, photocell control would also be conceivable.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Filtration Of Liquid (AREA)
  • Networks Using Active Elements (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The magnetic filter has a magnetic cylinder (2) pivotally mounted in a housing (1) and having an inclined stripper (14). The bottom of the cylinder (2) is surrounded by a casing (5), whereby a flow channel (6) for the medium to be filtered is created between the cylinder (2) and the casing (5). One portion (5b) of the casing (5) can be mobile so that the flow-channel profile section can be changed. Decreasing the channel profile section causes an increase in the flow resistance, resulting in a backwash, so that even in cases of small quantities the level and hence the inflow characteristic of the filter is approximately the same as that of the full-load quantity.

Description

Die Erfindung bezieht sich auf einen Magnetfilter, bestehend aus einer in einem Gehäuse drehbar gelagerten Magnetwalze mit Abstreifer, die unten von einem Mantel umhüllt ist, wobei zwischen der Walze und dem Mantel ein Durchflusskanal für das zu filtrierende Medium gebildet ist.The invention relates to a magnetic filter, consisting of a magnetic roller rotatably mounted in a housing with a scraper, which is enveloped at the bottom by a jacket, wherein a flow channel for the medium to be filtered is formed between the roller and the jacket.

Der Magnetfilter dient dazu, magnetisch leitende und nicht-leitende Schmutzteilchen aus Kühl- und Schmierflüssigkeiten zu entfernen, so dass diese wieder verwendet werden können. Der Sauberkeitsgrad der Kühl- und Schmierflüssigkeiten ist ein ausschlaggebender Faktor bei der Fertigungspräzision und der Oberflächengüte der bearbeiteten Maschinenteile. Eine Qualitätsverbesserung beim Magnetfilter führt zur Erhöhhng der Standzeit von Werkzeugen, Anlageteilen und der Schmier- und Kühlflüssigkeiten.The magnetic filter is used to remove magnetically conductive and non-conductive dirt particles from coolants and lubricants so that they can be reused. The degree of cleanliness of the coolants and lubricants is a decisive factor in the manufacturing precision and the surface quality of the machined machine parts. A Improving the quality of the magnetic filter leads to an increase in the service life of tools, system parts and the lubricants and coolants.

Automatische Magnetfilter sind in der modernen Technik seit langem bekannt, z.B. aus der US-PS 2.736.432 und der CH-PS 459.107. Die in der Praxis gebräuchlichsten Automaten sind mit einer langen Magnetwalze, die aus mehreren Magnetfeldern besteht, versehen. Die durch einen Motor mit Reduziergetriebe angetriebene Magnetwalze ist in einem Gehäuse gelagert, welches die Walze von unten umschliesst. Das zu reinigende Medium wird üblicherweise oberhalb der Achse über die in Achsrichtung des Magnetkörpers verlaufenden Durchflussöffnung der Anzugskraft der Magnetwalze zugeleitet. In gleicher Weise ist der Austritt auf der gegenüberliegenden Seite angeordnet, jedoch normalerweise etwas tiefer, um einen guten Durchfluss zu gewährleisten. Die magnetisch angezogenen, in der zu filtrierenden Flüssigkeit enthaltenen Verunreinigungen bauen sich in Form von Bärten an der Magnetwalze auf, wobei grosse Späne schneller angezogen werden als kleine. Die magnetische Induktion fällt mit der Vergrösserung der Distanz zwischen den Magneten und dem einzelnen Span ab. Vorwiegend kleinste Späne, die auf der Aussenseite, d.h. von der Walzenoberfläche am weitesten entfernt, im zu reinigenden Medium im Kanal mitfliessen, haben während des Durchflusses nicht genügend Zeit, bis zur magnetischen Oberfläche der Walze zu gelangen.Automatic magnetic filters have long been known in modern technology, e.g. from US-PS 2,736,432 and CH-PS 459.107. The machines most commonly used in practice are equipped with a long magnetic roller consisting of several magnetic fields. The magnetic roller, which is driven by a motor with a reduction gear, is mounted in a housing which surrounds the roller from below. The medium to be cleaned is usually supplied above the axis via the flow opening in the axial direction of the magnetic body to the pulling force of the magnetic roller. In the same way, the outlet is arranged on the opposite side, but usually a little lower to ensure a good flow. The magnetically attracted contaminants contained in the liquid to be filtered build up in the form of beards on the magnetic roller, with large chips being attracted faster than small ones. Magnetic induction decreases as the distance between the magnets and the individual chip increases. Mainly the smallest chips that are on the outside, i.e. furthest away from the roller surface, flowing in the medium to be cleaned in the channel, do not have enough time during the flow to reach the magnetic surface of the roller.

Wird die Durchflussmenge bei einem solchen Filter reduziert, so fällt das Niveau am Eintritt in den Durchflusskanal ab, die beaufschlagte Fläche auf der Magnetwalze wird kleiner und damit auch die Leistungsfähigkeit des Filters. Bei noch kleineren Mengen plätschert das zu reinigende Medium über die Einlaufkante, damit Turbulenzen im Durchlaufkanal erzeugend und damit den Wirkungsgrad des Magnetfilters zusätzlich reduzierend.If the flow rate in such a filter is reduced, the level at the inlet into the flow channel drops, the area acted upon on the magnetic roller becomes smaller and thus the performance of the filter. In the case of even smaller quantities, the medium to be cleaned ripples over the inlet edge, thus creating turbulence in the flow channel and thus additionally reducing the efficiency of the magnetic filter.

Es ist nun Aufgabe der Erfindung, einerseits den Wirkungsgrad von Magnetfiltern zu verbessern und andererseits die Durchflussbedingungen des zu reinigenden Mediums auch bei reduzierten Durchflussmengen optimal zu halten.It is an object of the invention to improve the efficiency of magnetic filters on the one hand and to keep the flow conditions of the medium to be cleaned optimal even with reduced flow rates.

Erfindungsgemäss wird diese Aufgabe so gelöst, dass der Durchflusskanalquerschnitt veränderbar ist. Vorteilhafterweise ist dazu mindestens ein Teil des Mantels beweglich ausgebildet. Es könnte aber auch ein Schieber vorgesehen sein, der regulierbar in den Durchflusskanal eindringt.According to the invention, this object is achieved in such a way that the flow channel cross section can be changed. For this purpose, at least part of the casing is advantageously designed to be movable. However, a slide valve could also be provided which penetrates the flow channel in a controllable manner.

Dadurch wird zum einen erreicht, dass nach der ersten Phase der Beruhigung und der Ausfilterung der grösseren Teile das zu reinigende Medium in Richtung der Magnete gelenkt wird und zum anderen die magnetische Induktion während der Annäherung des Spanes an die Magnete verstärkt wird. Eine Verminderung des Kanalquerschnittes ergibt eine Erhöhung des Durchflusswiderstandes, resultierend in einem Rückstau, so dass auch bei kleinen Mengen das Niveau und damit die Einfliesscharakteristik des Filters ungefähr derjenigen der Vollastmenge entspricht.On the one hand, this means that after the first phase of calming down and filtering out the larger parts, the medium to be cleaned is directed in the direction of the magnets and, on the other hand, the magnetic induction is strengthened as the chip approaches the magnets. A reduction in the channel cross section results in an increase in the flow resistance, resulting in a backflow, see above that even with small quantities, the level and thus the flow characteristics of the filter correspond approximately to that of the full load quantity.

Bei einer bevorzugten Ausführungsform weist der Magnetfilter eine Steueranordnung mit elektrischem Signalgeber auf, welcher in Abhängigkeit des Flüssigkeitsniveaus den Antriebsmotor der Magnetwalze ein-und ausschaltet.In a preferred embodiment, the magnetic filter has a control arrangement with an electrical signal transmitter, which switches the drive motor of the magnetic roller on and off as a function of the liquid level.

Aus der CH-PS 459.107 ist wohl bekannt, die Umlaufsteuerung der Magnetwalze durch einen Schwimmer vorzunehmen. Ein solcher beweglicher Steuerteil ist jedoch zu wenig betriebssicher und hat ein zu breites Regelband, um einen kontinuierlich hohen Wirkungsgrad zu gewährleisten.From CH-PS 459.107 it is well known to control the circulation of the magnetic roller by a float. However, such a movable control part is not reliable enough and has a control band that is too wide to ensure a continuously high level of efficiency.

Durch die erwähnte vorteilhafte Ausführungsform mit elektrischem Signalgeber werden diese Nachteile behoben. In Verbindung mit dem variierbaren Durchflussquerschnitt ist der Filterwirkungsgrad optimal den Betriebsbedingungen und den physikalischen Eigenschaften der Schmier- und Kühlflüssigkeiten automatisch anpassbar.These disadvantages are eliminated by the aforementioned advantageous embodiment with an electrical signal transmitter. In conjunction with the variable flow cross-section, the filter efficiency can be optimally adapted automatically to the operating conditions and the physical properties of the lubricating and cooling liquids.

Anhand der Zeichnungen werden nachstehend Ausführungsbeispiele der Erfindung näher erläutert. Es zeigen :

  • Fig. 1 einen Längsschnitt durch einen Magnetfilter und
  • Fig. 2 eine Draufsicht auf den Magnetfilter gemäss Fig. 1.
Exemplary embodiments of the invention are explained in more detail below with reference to the drawings. Show it :
  • Fig. 1 shows a longitudinal section through a magnetic filter and
  • FIG. 2 shows a top view of the magnetic filter according to FIG. 1.

Der Magnetfilter weist ein stabiles Aluminiumgehäuse 1 auf, in welchem eine horizontale Magnetwalze 2 drehbar gelagert ist. Die Walze 2 ist aus feinpoligen, leistungsstarken Permanentmagneten aufgebaut, die in schmalen Abständen angeordnet sind und über die ganze Walzenbreite ein starkes Magnetfeld erzeugen. Der Walzenantrieb erfolgt über ein Doppelschneckengetriebe 4 durch einen Elektromotor 3.The magnetic filter has a stable aluminum housing 1, in which a horizontal magnetic roller 2 is rotatably mounted. The roller 2 is constructed from fine-pole, powerful permanent magnets, which are arranged at narrow intervals and generate a strong magnetic field across the entire width of the roller. The roller drive takes place via a double worm gear 4 by an electric motor 3.

Unterhalb der Magnetwalze 2, im Abstand a von deren Oberfläche, ist ein gewölbter Blechmantel 5 angeordnet, der den unteren Teil der Walze 2 umhüllt. Dadurch wird zwischen der Walzenoberfläche und dem Blechmantel 5 ein Durchflusskanal 6 für die zu filtrierende Flüssigkeit gebildet. Der Blechmantel 5 besteht aus einem gehäusefesten Teil 5a und einem verschwenkbaren Teil 5b, welch'letzterer mittels eines zur Walzenachse 7 parallelen Scharniers 8 am festen Teil 5a befestigt ist. Statt aus Blech könnte der Mantel auch aus zwei Gussteilen bestehen.Below the magnetic roller 2, at a distance a from its surface, a curved sheet metal jacket 5 is arranged, which envelops the lower part of the roller 2. As a result, a flow channel 6 for the liquid to be filtered is formed between the roll surface and the sheet metal jacket 5. The sheet metal jacket 5 consists of a part 5a fixed to the housing and a pivotable part 5b, the latter being fastened to the fixed part 5a by means of a hinge 8 parallel to the roller axis 7. Instead of sheet metal, the jacket could also consist of two cast parts.

Zur Verstellung des verschwenkbaren Mantelteiles 5b dient ein ausserhalb des Gehäuses 1 angeordneter Handgriff 9, welcher über zwei Gelenkhebel 10, 11 mit dem verstellbaren Teil 5b verbunden ist. Bei konstantem Durchflussquerschnitt, d.h. bei konstanter Spalthöhe a , sind beide Mantelteile Sa, 5b koaxial zur Magnetwalze 2 angeordnet.A handle 9, which is arranged outside the housing 1 and which is connected to the adjustable part 5b via two articulated levers 10, 11, is used to adjust the pivotable jacket part 5b. With a constant flow cross-section, i.e. at a constant gap height a, both jacket parts Sa, 5b are arranged coaxially with the magnetic roller 2.

Mittels des Handgriffes 9 kann nun der bewegliche Mantelteil Sb so eingestellt werden, dass sich der Spalt in Durchflussrichtung kontinuierlich verengt, wobei im Bereich des beweglichen Mantelteiles 5b ein sich keilförmig verjüngender Durchflussquerschnitt entsteht. Diese Einstellung des beweglichen Mantelteiles ist in den Figuren gestrichelt eingetragen, wobei der Handgriff 9 alternativ auf der einen oder der anderen Gehäuseseite angeordnet sein kann.The movable jacket part Sb can now be adjusted by means of the handle 9 in such a way that the gap narrows continuously in the direction of flow, a flow cross section tapering in the form of a wedge being formed in the region of the movable jacket part 5b. This setting of the movable jacket part is shown in dashed lines in the figures, with the handle 9 alternatively being able to be arranged on one or the other side of the housing.

Statt der manuellen Verstellung wäre es auch möglich, den Durchflussquerschnitt automatisch zu regulieren, z.B. in nicht näher dargestellter Weise mit motorischem Antrieb in Funktion der gemessenen Durchflussmenge.Instead of manual adjustment, it would also be possible to regulate the flow cross-section automatically, e.g. in a manner not shown with motor drive as a function of the measured flow rate.

Ein an sich bekanntes, geneigtes Abstreifblech 14 ist oben am Gehäuse 1 befestigt und liegt mit seiner vorderen Kante 15 auf der Walzenoberfläche auf.A known, inclined scraper plate 14 is attached to the top of the housing 1 and lies with its front edge 15 on the roller surface.

Der Magnetwalze ist eine Vorfiltrierkammer 13 aus Aluminium vorgelagert, in welcher ein Schmutzaustragkorb eingesetzt werden kann. Die schräge Schikane 16 in der Vorfiltrierkammer 13 dient dazu, die einströmende Flüssigkeit zu beruhigen.A pre-filtering chamber 13 made of aluminum is arranged in front of the magnetic roller, in which a dirt discharge basket can be used. The sloping baffle 16 in the prefiltration chamber 13 serves to calm the inflowing liquid.

Das zu filtrierende Medium muss nämlich laminar und gleichmässig über die ganze Breite verteilt in den Durchflusskanal 6 einströmen, da Turbulenzen den Filterwirkungsgrad beeinträchtigen. Durch die Beruhigung in der Vorfiltrierkammer 13 findet eine gewisse Sedimentierung statt, insbesondere werden spezifisch schwere Teile wie Schleifscheibenabrieb, Späne, usw. abgelagert. Eine wesentliche Reinigungshilfe bringt der Schmutzaustragkorb mit sich, da die Sedimentierung durch diesen Korb einfach und schnell entfernt werden kann; eine aufwendige Reinigung bleibt erspart.The medium to be filtered has to flow into the flow channel 6 in a laminar manner and evenly distributed over the entire width, since turbulence affects the filter efficiency. Due to the calming in the prefiltration chamber 13, a certain sedi takes place mentation instead, especially heavy parts such as grinding wheel abrasion, chips, etc. are deposited. The dirt discharge basket is an important cleaning aid, since sedimentation can be removed quickly and easily using this basket; time-consuming cleaning is spared.

Aus der Vorkammer 13 fliesst das Medium durch die Schikane 16 und dann ruhig unter der Magnetwalze 2 durch. Der Durchflussspalt lässt sich nun in Fliessrichtung, je nach Bedarfsfall, stärker oder schwächer keilförmig verengen. Dadurch werden die grösseren Eisenteilchen zuerst ausgeschieden und die Wirksamkeit der Ausfiltrierung im Mikronbereich in den verengten Stellen wesentlich erhöht. Um eine erhöhte Reinigung zu erreichen, kann der Ausfluss auf die Einlaufhöhe zurückgestaut werden durch ein Steigrohr oder durch Erhöhung der verstellbaren Schikanen.The medium flows out of the antechamber 13 through the baffle 16 and then smoothly under the magnetic roller 2. The flow gap can now be narrowed more or less in a wedge shape in the direction of flow, as required. As a result, the larger iron particles are excreted first and the effectiveness of the filtration in the micron range in the constricted areas is significantly increased. In order to achieve increased cleaning, the outflow can be backed up to the inlet height by a riser pipe or by increasing the adjustable baffles.

Damit die im ausgebilterten Material noch enthaltene Flüssigkeit in den Behälter zurückfliessen kann, ist das verstellbare Abstreifblech 14 leicht ansteigend angeordnet. Der Schmutz wird auf dem Abstreiflech immer weiter nach hinten geschoben und fällt dann weitgehend trocken in einen dafür vorgesehenen Schmutzbehälter.So that the liquid still contained in the filtered material can flow back into the container, the adjustable scraper plate 14 is arranged to rise slightly. The dirt is pushed further and further back on the scraper plate and then falls largely dry into a designated dirt container.

Durch die stufenlose Veränderung des Durchflusskeiles kann für jeden Bedarfsfall be'züglich gewünschter Filterleistung und Durchflussmenge eine optimale Position gefunden werden. Eine Filteranlage kann sofort einer verämderten Betriebsbedingung oder Anwendung angepasst werden. So werden Eisenteilchen praktisch immer vollständig und, dank der Netzwirkung, Nichteisenstoffe zum grössten Teil kontinuierlich aus der Kühl- und Schmierflüssigkeit (Oele, Wasser, Emulsionen) entzogen.Thanks to the continuous change in the flow wedge züglich desired filter capacity and flow rate can for every need be 'optimal Position can be found. A filter system can be immediately adapted to a changed operating condition or application. In this way, iron particles are practically always completely and, thanks to the wetting effect, non-ferrous substances largely removed continuously from the coolant and lubricant (oils, water, emulsions).

Statt die Magnetwalze 2 kontinuierlich rotieren zu lassen, kann der Magnetfilter mit einer elektronischen Steuerung für den Antrieb versehen sein. Dies ermöglicht neben der Arbeitsweise als reiner Magnetfilter einen Betrieb der Anlage als Anschwemmfilter, also ein Ausfiltern von nicht-magnetisierbarem Material. In Verbindung mit der Verstellvorrichtung, d.h. durch Veränderung des Durchflusskeiles, kann mit der Walzensteuerung praktisch jeder gewünschte Filtrerwirkungsgrad erzielt werden. Ein kapazitiver Kompaktgrenzschalter 17 ragt mit seinen Messteilen 18 in die Flüssigkeit in der Vorfiltrierkammer 13. Er ist für Feinregulierung ausgelegt und spricht auf kleinste Veränderungen des Durchflusswiderstandes bzw. des Flüssigkeitsniveaus an und schaltet den Antriebsmotor 3 in einem engen Regelband automatisch ein und aus. Damit erübrigt sich jedes manuelle Neuregulieren bei Veränderung des Verschmutzungsgrades der zu filtrierenden Flüssigkeit.Instead of allowing the magnetic roller 2 to rotate continuously, the magnetic filter can be provided with an electronic control for the drive. In addition to working as a purely magnetic filter, this enables the system to be operated as a precoat filter, that is, filtering out non-magnetizable material. In connection with the adjustment device, i.e. By changing the flow wedge, practically any desired filter efficiency can be achieved with the roller control. A capacitive compact limit switch 17 projects with its measuring parts 18 into the liquid in the pre-filtering chamber 13. It is designed for fine regulation and responds to the smallest changes in the flow resistance or the liquid level and automatically switches the drive motor 3 on and off in a narrow control band. This eliminates the need for any manual re-regulation when changing the degree of contamination of the liquid to be filtered.

Die grundsätzliche Arbeitsweise entspricht derjenigen des Magnetfilters ohne Signalgeber, nur dreht sich die Magnetwalze bei Inbetriebsetzung noch nicht. Sofort bauen sich die magnetisierbaren Teile zu einem bartförmigen Sieb im Durchflusskeil auf, was unmittelbar zur Anschwemmung von nicht-magnetisierbaren Teilen führt und damit eine dichte Filterschicht bildet.The basic mode of operation corresponds to that of the magnetic filter without signal transmitter, only the magnetic roller does not turn when it is started up. The magnetizable parts immediately build into one beard-shaped sieve in the flow wedge, which leads directly to the floating of non-magnetizable parts and thus forms a tight filter layer.

Der Grad der Ausfilterung kann stufenlos im kapazitiven Kompaktgrenzschalter eingestellt werden. Uebersteigt der Durchflusswiderstand im Filter den vorbestimmten Wert, so löst ein Steuerbefehl eine Vorwärtsdrehung der Magnetwalze aus. Ist ein kleiner Teil der Filterschicht ausgetragen, so reduziert sich der Durchflusswiderstand, der Motor wird ausgeschaltet, und die Magnetwalze sreht wieder fest. Diese moderne Art von elektronischer Kapazitivsteuerung kann in einem schmalen Regelband arbeiten mit kruzen Taktintervallen, um damit den Filterwirkungsgrad stets in engen Grenzen zu halten. Das Band lässt sich ausserdem fast beliebig nach oben oder unten verschieben. Die Messstelle kann sich innerhalb oder ausserhalb des Filtergehäuses befinden, je nach Medium.The degree of filtering can be infinitely adjusted in the capacitive compact limit switch. If the flow resistance in the filter exceeds the predetermined value, a control command triggers a forward rotation of the magnetic roller. If a small part of the filter layer is discharged, the flow resistance is reduced, the motor is switched off and the magnetic roller turns tight again. This modern type of electronic capacitive control can work in a narrow control band with short cycle intervals in order to keep the filter efficiency always within narrow limits. The belt can also be moved up or down almost as you like. The measuring point can be inside or outside the filter housing, depending on the medium.

Bei weiteren Ausführungsformen wird statt der Magnetwalze eine elektrisch magnetisierbare Walze vorgesehen. Zur Veränderung des Durchflusskanalquerschnittes wäre es auch möglich, bei festem Mantel einen Schieber regulierbar in den Kanal eindringen zu lassen. Schliesslich könnten statt des elektrischen Signalgebers auch ein Membranschalter oder ein Annäherungsschalter Verwendung finden, die in Abhängigkeit des Flüssigkeitsniveaus den Elektromotor steuern. Je nach Art des Mediums wäre auch eine Photozellensteuerung denkbar.In further embodiments, an electrically magnetizable roller is provided instead of the magnetic roller. To change the flow channel cross-section, it would also be possible to have a slide regulatingly penetrate into the channel with a fixed jacket. Finally, instead of the electrical signal transmitter, a membrane switch or a proximity switch could also be used, which control the electric motor as a function of the liquid level. Depending on the type of medium, photocell control would also be conceivable.

Claims (8)

1. Magnetfilter, bestehend aus einer in einem Gehäuse drehbar gelagerten Magnetwalze mit Abstreifer, die unten von einem Mantel umhüllt ist, wobei zwischen der Walze und dem Mantel ein Durchflusskanal für das zu filtrierende Medium gebildet ist, dadurch gekennzeichnet, dass der Durchflusskanalquerschnitt veränderbar ist.1. Magnetic filter, consisting of a rotatably mounted magnetic roller with a scraper, which is enveloped at the bottom by a jacket, wherein a flow channel for the medium to be filtered is formed between the roller and the jacket, characterized in that the flow channel cross section is variable. 2. Magnetfilter nach Patentanspruch 1, dadurch gekennzeichnet, dass zur Veränderung des Durchflusskanalquerschnittes mindestens ein Teil (5b) des Mantels (5) beweglich ausgebildet ist.2. Magnetic filter according to claim 1, characterized in that at least a part (5b) of the jacket (5) is designed to be movable to change the flow channel cross section. 3. Magnetfilter nach Patentanspruch 1, dadurch gekennzeichnet, dass ein Schieber vorgesehen ist, welcher regulierbar in den Durchflusskanal (6) hineinragt.3. Magnetic filter according to claim 1, characterized in that a slide is provided which protrudes into the flow channel (6). 4. Magnetfilter nach Patentanspruch 2, dadurch gekennzeichnet, dass der inbezug auf die Durchflussrichtung hintere Mantelteil (5b) um einen vorderen, festen Mantelteil (5a) verschwenkbar ist, wobei die Schwenkachse (8) parallel zur Walzenachse (7) verläuft.4. Magnetic filter according to claim 2, characterized in that the rear jacket part (5b) in relation to the flow direction is pivotable about a front, fixed jacket part (5a), the Swivel axis (8) runs parallel to the roller axis (7). 5. Magnetfilter nach Patentanspruch 4, dadurch gekennzeichnet, dass der hintere Mantelteil (Sb) über eine Gelenkhebelanordnung (10, 11) mit einem ausserhalb des Gehäuses (1) vorgesehenen Betätigungshebel (9) verbunden ist.5. Magnetic filter according to claim 4, characterized in that the rear jacket part (Sb) via an articulated lever arrangement (10, 11) with an outside of the housing (1) provided actuating lever (9) is connected. 6. Magnetfilter nach Patentanspruch 4, dadurch gekennzeichnet, dass der Mantel (5) aus zwei gebogenen Blech- oder Gussstücken (5a, 5b) besteht, die mittig über ein Scharnier (8) miteinander verbunden sind, und die in einer Stellung konstanten Durchflussquerschnittes koaxial zur Magnetwalze (2) angeordnet sind.6. Magnetic filter according to claim 4, characterized in that the jacket (5) consists of two bent sheet metal or cast pieces (5a, 5b) which are connected to one another centrally via a hinge (8), and which are coaxial in one position with a constant flow cross section are arranged to the magnetic roller (2). 7. Magnetfilter nach Patentanspruch 1, gekennzeichnet durch eine Steueranordnung mit elektrischem Signalgeber (17), welcher mit dem Medium zusammenwirkt und in Abhängigkeit von dessen Niveau einen Antriebsmotor (3) für die Magnetwalze (2) ein- und ausschaltet.7. Magnetic filter according to claim 1, characterized by a control arrangement with an electrical signal transmitter (17) which interacts with the medium and, depending on its level, switches a drive motor (3) for the magnetic roller (2) on and off. 8. Magnetfilter nach Patentanspruch 4, dadurch gekennzeichnet, dass der Durchflusskanalquerschnitt Bereich des hinteren Mantelteiles (5b) kontinuierlich, keilförmig sich verjüngend reduzierbar ist.8. Magnetic filter according to claim 4, characterized in that the flow channel cross-section area of the rear jacket part (5b) can be reduced in a wedge-shaped manner.
EP79810096A 1978-09-21 1979-09-17 Magnetic filter Expired EP0009467B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79810096T ATE237T1 (en) 1978-09-21 1979-09-17 MAGNETIC FILTER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH989278 1978-09-21
CH9892/78 1978-09-21

Publications (3)

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EP0009467A2 true EP0009467A2 (en) 1980-04-02
EP0009467A3 EP0009467A3 (en) 1980-04-30
EP0009467B1 EP0009467B1 (en) 1981-09-23

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ID=4356812

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EP79810096A Expired EP0009467B1 (en) 1978-09-21 1979-09-17 Magnetic filter

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US (1) US4293410A (en)
EP (1) EP0009467B1 (en)
JP (1) JPS5597262A (en)
AT (1) ATE237T1 (en)
DE (1) DE2960898D1 (en)

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CN102470374A (en) * 2009-07-31 2012-05-23 西门子公司 Method for separating magnetisable particles from a suspension and associated device
CN107297277A (en) * 2017-07-01 2017-10-27 太仓英达锅炉设备有限公司 Absorption type lube oil purification unit
CN108889999A (en) * 2018-07-12 2018-11-27 王军 A kind of milling attachment for the execution Milling Process inside slot
CN110090500A (en) * 2019-05-17 2019-08-06 嘉兴济铭商贸有限公司 A kind of exhaust fan started automatically

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ES2264899B1 (en) 2005-07-12 2008-01-01 Centro De Investigacion De Rotacion Y Torque Aplicada, S.L. FILTER TO CAPTURE POLLUTANT EMISSIONS.
DE102006013256B4 (en) * 2006-03-21 2008-11-20 Jostarndt Patentanwalts-Ag Apparatus and method for removing particles from a liquid
USH2238H1 (en) 2006-07-26 2010-05-04 The United States Of America As Represented By The Secretary Of The Navy Magnetic particle separator
CA2890893C (en) * 2012-12-04 2020-01-07 Evoqua Water Technologies Llc Magnetic drum inlet slide and scraper blade
US9242251B2 (en) 2013-01-30 2016-01-26 Wheelabrator Group, Inc. Magnetic separator with dynamic baffle system
CN107769753A (en) * 2017-09-20 2018-03-06 戴承萍 A kind of reconfigurable filter and complex filter
CN111183002B (en) * 2017-10-13 2022-04-05 住友重机械精科技株式会社 Coolant treatment device

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CN102470374A (en) * 2009-07-31 2012-05-23 西门子公司 Method for separating magnetisable particles from a suspension and associated device
CN102470374B (en) * 2009-07-31 2015-06-03 西门子公司 Method for separating magnetisable particles from a suspension and associated device
CN107297277A (en) * 2017-07-01 2017-10-27 太仓英达锅炉设备有限公司 Absorption type lube oil purification unit
CN108889999A (en) * 2018-07-12 2018-11-27 王军 A kind of milling attachment for the execution Milling Process inside slot
CN110090500A (en) * 2019-05-17 2019-08-06 嘉兴济铭商贸有限公司 A kind of exhaust fan started automatically

Also Published As

Publication number Publication date
JPS5597262A (en) 1980-07-24
ATE237T1 (en) 1981-10-15
EP0009467B1 (en) 1981-09-23
US4293410A (en) 1981-10-06
EP0009467A3 (en) 1980-04-30
DE2960898D1 (en) 1981-12-10

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