DE1178670B - Method and arrangement for reducing the wear and tear on roller plain bearings cooled with cooling water - Google Patents

Method and arrangement for reducing the wear and tear on roller plain bearings cooled with cooling water

Info

Publication number
DE1178670B
DE1178670B DE1960P0025427 DEP0025427A DE1178670B DE 1178670 B DE1178670 B DE 1178670B DE 1960P0025427 DE1960P0025427 DE 1960P0025427 DE P0025427 A DEP0025427 A DE P0025427A DE 1178670 B DE1178670 B DE 1178670B
Authority
DE
Germany
Prior art keywords
wear
arrangement
plain bearings
roll neck
cooling water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE1960P0025427
Other languages
German (de)
Inventor
Dr Kurt Born
Georg Gebauer
Walter Hattwig
Dr Gerhard Heim
Dr Heinrich Klas
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.)
Phoenix Rheinrohr AG
Original Assignee
Phoenix Rheinrohr AG
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 Phoenix Rheinrohr AG filed Critical Phoenix Rheinrohr AG
Priority to DE1960P0025427 priority Critical patent/DE1178670B/en
Publication of DE1178670B publication Critical patent/DE1178670B/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/04—Controlling or regulating desired parameters
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/10—Electrodes characterised by the structure
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
    • C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
    • C23F2213/31—Immersed structures, e.g. submarine structures

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Rolling Contact Bearings (AREA)

Description

Verfahren und Anordnung zur Verringerung des Verschleißes von mit Kühlwasser gekühlten Walzengleitlagern Der mechanische Verschleiß von mit Wasser gekühlten und geschmierten Gleitlagern hängt von der Flächenpressung, der Umfangsgeschwindigkeit der sich drehenden Zapfen od. dgl. und von der Temperatur der Lagerteile ab. Es wurde nun bei Walzwerken, insbesondere schnellaufenden Walzwerken, festgestellt, daß der Verschleiß des mit Wasser gekühlten Walzenzapfens und der Preßstofflagerschale oft sprunghaft ansteigt, trotzdem die vorgenannten Einflußgrößen unverändert geblieben waren. Wegen dieses vorzeitigen Verschleißes müssen die Walzen häufig ein- und ausgebaut, die Walzenzapfen abgedreht sowie die Lagerschalen ausgewechselt werden.Method and arrangement for reducing the wear and tear of with Cooling water cooled roller plain bearings The mechanical wear and tear of water cooled and lubricated plain bearings depends on the surface pressure, the peripheral speed the rotating pin or the like and the temperature of the bearing parts. It has now been found in rolling mills, especially high-speed rolling mills, that the wear of the water-cooled roll neck and the pressed material bearing shell often increases by leaps and bounds, despite the fact that the aforementioned influencing variables have remained unchanged was. Because of this premature wear, the rollers often have to be installed and removed, the roll journals are turned off and the bearing shells are replaced.

Der vorzeitige Verschleiß des Walzenzapfens wird, wie die Erfahrung gezeigt hat, erfindungsgemäß verhindert durch Anwendung des kathodischen Schutzes auf dem Walzenzapfen.The premature wear of the roll neck will, as experience has shown, prevented according to the invention by using cathodic protection on the roll neck.

Es ist bekannt, die Korrosion von Rohrleitungen, Behältern oder Schiffsteilen durch kathodischen Schutz zu verhindern. Bei dem Korrosionsschutz für Schiffsteile wird beispielsweise die Schraubenwelle mit dem negativen Pol einer Spannungsquelle verbunden, während deren positiver Pol mit Anoden verbunden ist, die im Kühlwasser der Schiffsmaschine angeordnet sind. Es ist auch bekannt, die zu schützende Metalloberfläche mit einem den Elektrolyten absorbierenden Material abzudecken, wodurch eine elektrolytische Verbindung zwischen der zu schützenden Metalloberfläche und einer Anode ermöglicht wird.The corrosion of pipelines, containers or ship parts is known to prevent by cathodic protection. When it comes to corrosion protection for ship parts for example, the screw shaft with the negative pole of a voltage source connected, while its positive pole is connected to anodes in the cooling water the ship's engine are arranged. It is also known the metal surface to be protected cover with an electrolyte absorbing material, creating an electrolytic Allows connection between the metal surface to be protected and an anode will.

Die erfindungsgemäße Lehre steht im Gegensatz zu den bisherigen Erfahrungen, wonach bei einem kathodischen Schutz zwischen der Anode und der Kathode ein nach allen Seiten ausgedehnter Elektrolyt vorhanden sein muß, so daß sämtliche Oberflächenbereiche genügend Schutzstrom erhalten (vergleiche v. Baeckmann in ETZ, 1961, S.273ff.).The teaching according to the invention is in contrast to previous experience, after which a cathodic protection between the anode and the cathode after extensive electrolyte must be present on all sides, so that all surface areas get enough protective current (compare v. Baeckmann in ETZ, 1961, p.273ff.).

Da bei Walzenlagern, auf die sich die Erfindung bezieht, nur ein ringförmiger Spalt zwischen Walzenzapfen und Lagerschale besteht, also nur ein dünner Elektrolytfilm von etwa 0,1 mm vorhanden ist, war ein kathodischer Schutz des Walzenzapfens nicht zu erwarten. Trotz der ungünstigen Bedingungen hinsichtlich Verteilung des Schutzstromes bei Walzengleitlagern hat sich gezeigt, daß eine Korrosion des Zapfens erfindungsgemäß sicher verhindert wird. Dem Walzenzapfen wird ein kathodischer Schutzstrom von einer Anode über das als Elektrolyt dienende Kühlwasser zugeführt. Zu diesem Zweck wird die untere Metallstützschale isoliert angeordnet und mit dem Pluspol einer Gleichstromquelle verbunden, während der Minuspol dieser Stromquelle an den Walzenzapfen gelegt wird. Es können aber auch Blechstreifen aus unlegiertem Stahl in die Preßstofflagerschalen eingelassen und als Anoden verwendet werden. Der Kühlwasserzu- und -abfluß in den Walzenlagern muß so einreguliert werden, daß das Walzenlager weitgehend mit Wasser gefüllt ist. In den Zeichnungen zeigt A b b. 1 einen Längsschnitt durch ein Walzenlager mit isoliert aufgehängter Stützschale, A b b. 2 einen Querschnitt durch ein Walzenlager mit Anodenblechen, die in die Preßstofflagerschalen eingelassen sind.Since in roller bearings to which the invention relates, only an annular one There is a gap between the roll neck and the bearing shell, i.e. only a thin electrolyte film of about 0.1 mm is present, there was no cathodic protection of the roll neck expected. Despite the unfavorable conditions with regard to the distribution of the protective current with roller plain bearings it has been shown that corrosion of the journal according to the invention is safely prevented. The roll neck is supplied with a cathodic protective current from a The anode is supplied via the cooling water serving as the electrolyte. To this end, will the lower metal support shell arranged in an isolated manner and connected to the positive pole of a direct current source connected while the negative pole of this power source is placed on the roll neck. However, sheet metal strips made of unalloyed steel can also be placed in the pressed material bearing shells embedded and used as anodes. The cooling water inflow and outflow in the Roller bearings must be adjusted in such a way that the roller bearings are largely filled with water is filled. In the drawings, A b shows b. 1 shows a longitudinal section through a roller bearing with insulated suspended support shell, A b b. 2 shows a cross section through a roller bearing with anode sheets that are embedded in the pressed material bearing shells.

Mit 1 ist der Walzenzapfen bezeichnet, der in der Preßstofflagerschale 2 gelagert ist. Die Lagerschale 2 liegt in der metallenen isoliert aufgehängten Stützschale 3.The roll neck, which is mounted in the pressed material bearing shell 2, is designated by 1. The bearing shell 2 lies in the metal support shell 3, which is suspended in an insulated manner.

Gemäß A b b. 2 sind in der Preßstofflagerschale 2 Anodenbleche 4 angeordnet. Die Bohrungen für den Wasserein- und -austritt sind mit 5 bzw. 6 bezeichnet.According to A b b. 2 2 anode plates 4 are arranged in the pressed material bearing shell. The holes for the water inlet and outlet are denoted by 5 and 6 , respectively.

Der kathodische Schutzstrom ist so einzustellen, daß das gegen eine Kupfer-Kupfersulfat-Elektrode gemessene Potential des Walzenzapfens mindestens - 850 mV beträgt. Im Gegensatz zu den üblichen kathodischen Schutzverfahren, bei denen man bestrebt ist, durch Einstellung eines hohen Potentials zunächst eine Schutzschicht auf der Kathode zu bilden, wird im vorliegenden Fall vorzugsweise ein Schutzpotential von höchstens -1000 mV eingestellt. Dadurch wird die Ablagerung kalkhaltiger Schichten auf dem Walzenzapfen verhindert, die sich nachteilig auf die Laufeigenschaften auswirken.The cathodic protective current is to be set so that the against a Copper-copper sulphate electrode measured potential of the roll neck at least - 850 mV. In contrast to the usual cathodic protection methods in which the aim is to first create a protective layer by setting a high potential to form on the cathode is preferably a protective potential in the present case set to a maximum of -1000 mV. This makes the deposit more calcareous layers prevents on the roll neck, which have a detrimental effect on the running properties.

Durch das erfindungsgemäße Verfahren gelingt es, die Walzenzapfen vollkommen blank zu halten und einen vorzeitigen Verschleiß des Zapfens und der Preßstofflagerschalen zu verhindern. Die Ursache für diese überraschende Wirkung des kathodischen Schutzes auf den mechanischen Verschleiß im Lager ist sehr wahrscheinlich darauf zurückzuführen, daß eine Korrosion des Walzenzapfens und eine Aufrauhung der Zapfenoberfläche durch die Polarisations-Korrosion selbst und durch die Korrosionsprodukte nicht mehr eintritt und damit ein vorzeitiger Verschleiß der Preßstofflagerschalen vermieden wird.The method according to the invention makes it possible to produce the roll necks to keep completely blank and a premature wear of the pin and the Prevent molded bearing shells. The cause of this surprising effect of cathodic protection on mechanical wear in the bearing is very likely due to corrosion of the roll neck and roughening the pin surface by the polarization corrosion itself and by the corrosion products no longer occurs and thus premature wear of the pressed material bearing shells is avoided.

Das erfindungsgemäße Verfahren kann nicht nur in Walzenlagern, sondern darüber hinaus überall dort angewendet werden, wo in Gegenwart von Wasser auf Reibung beanspruchte Maschinenelemente verschleißgefährdet sind.The inventive method can not only in roller bearings, but can also be used where there is friction in the presence of water stressed machine elements are at risk of wear.

Claims (4)

Patentansprüche: 1. Anwendung des kathodischen Schutzes auf den Walzenzapfen zur Verringerung des Verschleißes von mit Wasser gekühlten Walzengleitlagern. Claims: 1. Application of cathodic protection to the roll neck to reduce the wear of water-cooled roller plain bearings. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Potential des Walzenzapfens auf mindestens - 850 mV bis höchstens -1000 mV, gemessen gegen eine Kupfer-Kupfersulfat-Elektrode, eingestellt wird. 2. Method according to claim 1, characterized in that the potential of the roll neck to at least - 850 mV to a maximum of -1000 mV, measured against a copper-copper sulfate electrode, is set. 3. Anordnung zur Durchführung des Verfahrens nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Stützschale (3), in der die Lagerschale (2) liegt, elektrisch isoliert und mit dem Pluspol der Schutzstromquelle verbunden ist. 3. Arrangement for performing the method according to claim 1 or 2, characterized in that the support shell (3) in which the bearing shell (2) lies, is electrically isolated and connected to the positive terminal of the protective power source. 4. Anordnung zur Durchführung des Verfahrens nach Anspruch 1 oder 2, gekennzeichnet durch in die Preßstofflagerschalen (2) eingelassene Anodenbleche (4). In Betracht gezogene Druckschriften: Britische Patentschrift Nr. 503 946 (referiert im Chem. Centralblatt 1939/1I, S.4348); USA.-Patentschrift Nr. 2 744 863; »Werkstoffe und Korrosion«, 1954, S. 84 bis 87; »Schiff und Hafen«, 1954, S. 136, 140.4th Arrangement for carrying out the method according to claim 1 or 2, characterized through anode plates (4) embedded in the pressed material bearing shells (2). Into consideration Drawn pamphlets: British Patent No. 503,946 (referenced in Chem. Centralblatt 1939/1I, p.4348); U.S. Patent No. 2,744,863; »Materials and Korrosion ”, 1954, pp. 84 to 87; "Schiff und Hafen", 1954, pp. 136, 140.
DE1960P0025427 1960-07-27 1960-07-27 Method and arrangement for reducing the wear and tear on roller plain bearings cooled with cooling water Pending DE1178670B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1960P0025427 DE1178670B (en) 1960-07-27 1960-07-27 Method and arrangement for reducing the wear and tear on roller plain bearings cooled with cooling water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1960P0025427 DE1178670B (en) 1960-07-27 1960-07-27 Method and arrangement for reducing the wear and tear on roller plain bearings cooled with cooling water

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DE1178670B true DE1178670B (en) 1964-09-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4332922A1 (en) * 1993-09-28 1995-03-30 Kloeckner Humboldt Deutz Ag Two-high roller machine and process for the pressure comminution of granular moist material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB503946A (en) * 1936-07-10 1939-04-11 Joseph Lepage Improvements in or relating to methods of protecting the screws, condensers or otherparts of ships or other marine craft against corrosion
US2744863A (en) * 1951-10-25 1956-05-08 Smith Corp A O Cathodic protection of metal in vapor space

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB503946A (en) * 1936-07-10 1939-04-11 Joseph Lepage Improvements in or relating to methods of protecting the screws, condensers or otherparts of ships or other marine craft against corrosion
US2744863A (en) * 1951-10-25 1956-05-08 Smith Corp A O Cathodic protection of metal in vapor space

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4332922A1 (en) * 1993-09-28 1995-03-30 Kloeckner Humboldt Deutz Ag Two-high roller machine and process for the pressure comminution of granular moist material

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