DE102018129696A1 - Main rotor bearing or gearbox mounting - Google Patents
Main rotor bearing or gearbox mounting Download PDFInfo
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- DE102018129696A1 DE102018129696A1 DE102018129696.7A DE102018129696A DE102018129696A1 DE 102018129696 A1 DE102018129696 A1 DE 102018129696A1 DE 102018129696 A DE102018129696 A DE 102018129696A DE 102018129696 A1 DE102018129696 A1 DE 102018129696A1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/62—Selection of substances
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/64—Special methods of manufacture
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2202/00—Solid materials defined by their properties
- F16C2202/02—Mechanical properties
- F16C2202/04—Hardness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/02—Noble metals
- F16C2204/04—Noble metals based on silver
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/60—Ferrous alloys, e.g. steel alloys
- F16C2204/64—Medium carbon steel, i.e. carbon content from 0.4 to 0,8 wt%
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/60—Ferrous alloys, e.g. steel alloys
- F16C2204/70—Ferrous alloys, e.g. steel alloys with chromium as the next major constituent
- F16C2204/72—Ferrous alloys, e.g. steel alloys with chromium as the next major constituent with nickel as further constituent, e.g. stainless steel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/10—Hardening, e.g. carburizing, carbo-nitriding
- F16C2223/18—Hardening, e.g. carburizing, carbo-nitriding with induction hardening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/60—Thickness, e.g. thickness of coatings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/70—Diameters; Radii
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/10—Application independent of particular apparatuses related to size
- F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/31—Wind motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Die Erfindung betrifft eine Hauptrotorlagerung einer Windkraftanlage oder eine Getriebelagerung, umfassend ein Wälzlager mit zumindest einem induktiv schlupffrei randschichtgehärteten Lagerring, wobei für den zumindest einen Lagerring ein Nickel-Vanadium-legierter Stahl 56NiCrMoV7 mit folgenden Legierungsbestandteilen vorgesehen ist:0,45 bis 0,60 Gew.-% Kohlenstoff,0,1 bis 0,4 Gew.-% Silizium,0,6 bis 0,9 Gew.-% Mangan,0,8 bis 1,2 Gew.-% Chrom,0,05 bis 0,15 Gew.-% Vanadium,1,5 bis 1,8 Gew. % Nickel,0,35 bis 0,55 Gew.-% Molybdän.The invention relates to a main rotor bearing a wind turbine or a gearbox bearing comprising a rolling bearing with at least one inductively slip-free surface hardened bearing ring, wherein for the at least one bearing ring a nickel-vanadium alloy steel 56NiCrMoV7 is provided with the following alloy components: 0.45 to 0.60 wt % Carbon, 0.1 to 0.4 wt% silicon, 0.6 to 0.9 wt% manganese, 0.8 to 1.2 wt% chromium, 0.05 to 0, 15% by weight of vanadium, 1.5 to 1.8% by weight of nickel, 0.35 to 0.55% by weight of molybdenum.
Description
Die Erfindung betrifft eine Hauptrotorlagerung einer Windkraftanlage oder eine Getriebelagerung, umfassend ein Wälzlager mit zumindest einem induktiv schlupffrei randschichtgehärteten Lagerring.The invention relates to a main rotor bearing a wind turbine or a gearbox mounting, comprising a rolling bearing with at least one inductively slip-free edge hardened bearing ring.
Wälzlager mit auf gegenüberliegend angeordneten ringförmigen Laufflächen auf einem oder mehreren Teilkreisen abwälzenden Wälzkörpern sind hinreichend bekannt. Hierbei sind die Laufflächen an zwei gegenüberliegenden Lagerringen wie Innenring und Außenring oder auf einer Welle und zumindest einem Lagerring, beispielsweise einem Außenring angearbeitet.Rolling bearings with rolling elements rolling on oppositely arranged annular running surfaces on one or more pitch circles are well known. Here, the running surfaces are worked on two opposite bearing rings such as inner ring and outer ring or on a shaft and at least one bearing ring, for example, an outer ring.
Zur Erhöhung der Vergütung werden Wälzlager, insbesondere Großwälzlager, induktiven Härteverfahren, beispielsweise induktiven Randschichthärteverfahren, unterzogen. Beispielsweise ist aus der Druckschrift
Für derart große Lagerringe sind spezielle Stahllegierungen notwendig, welche wälzfeste Härten von 650 HV in den Randbereichen ermöglichen. Hierzu werden Stahllegierungen des Typs XXCrMo4 eingesetzt, wobei XX beispielsweise für 42 oder 50 steht. Die Härtbarkeit dieser Legierungen ist auf vergleichsweise kleine Wandstärken des zumindest einen Lagerrings, insbesondere für sehr große Wälzlager, beschränkt. Mit zunehmender Wandstärke müssen die Lagerringe mit zunehmender Wandstärke nach der Induktivhärtung schroffer, das heißt mit höheren Temperaturgradienten pro Zeiteinheit, beispielsweise in wässrigen Salzlösungen oder dergleichen, abgeschreckt werden, so dass Härterisse auftreten können.For such large bearing rings special steel alloys are necessary, which allow rolling hardnesses of 650 HV in the edge regions. For this purpose, steel alloys of the type XXCrMo4 are used, where XX stands for 42 or 50, for example. The hardenability of these alloys is limited to comparatively small wall thicknesses of the at least one bearing ring, in particular for very large rolling bearings. With increasing wall thickness, the bearing rings with increasing wall thickness after induction hardening must be abrupt, that is quenched with higher temperature gradients per unit time, for example in aqueous salt solutions or the like, so that cracks can occur.
Weiterhin kann die, diesen Stahllegierungen eigene Härtbarkeit zu einer unzureichenden Homogenität des notwendigen Vergütungsgefüges vom Rand bis zum Kern führen. Dadurch ist der Induktivhärteprozess schwer zu steuern und kann die Qualität des Fertigungsprozesses insbesondere bei schroffer Abschreckung negativ beeinträchtigen.Furthermore, the hardenability inherent in these steel alloys can lead to insufficient homogeneity of the necessary tempering structure from the edge to the core. As a result, the induction hardening process is difficult to control and can adversely affect the quality of the manufacturing process, especially in the case of a severe quenching.
Aufgabe der Erfindung ist die Weiterbildung eines Werkstoffes für einen induktiv gehärteten Lagerring eines Wälzlagers einer Hauptrotorlagerung einer Windkraftanlage oder einer Getriebelagerung.The object of the invention is the development of a material for an inductively hardened bearing ring of a rolling bearing of a main rotor bearing a wind turbine or a gearbox mounting.
Die Aufgabe wird für eine Hauptrotorlagerung einer Windkraftanlage oder eine Getriebelagerung gelöst, umfassend ein Wälzlager mit zumindest einem induktiv schlupffrei randschichtgehärteten Lagerring, wobei für den zumindest einen Lagerring ein Nickel-Vanadium-legierter Stahl 56NiCrMoV7 mit folgenden Legierungsbestandteilen vorgesehen ist:
- 0,45 bis 0,60 Gew.-% Kohlenstoff,
- 0,1 bis 0,4 Gew.-% Silizium,
- 0,6 bis 0,9 Gew.-% Mangan,
- 0,8 bis 1,2 Gew.-% Chrom,
- 0,05 bis 0,15 Gew.-% Vanadium,
- 1,5 bis 1,8 Gew. % Nickel,
- 0,35 bis 0,55 Gew.-% Molybdän.
- 0.45 to 0.60 wt.% Carbon,
- 0.1 to 0.4% by weight of silicon,
- 0.6 to 0.9% by weight of manganese,
- 0.8 to 1.2% by weight of chromium,
- From 0.05% to 0.15% by weight of vanadium,
- 1.5 to 1.8% by weight nickel,
- 0.35 to 0.55 weight percent molybdenum.
Der vorgeschlagene Werkstoff ist für ein Wälzlager mit zumindest einem schlupffrei induktiv randschichtgehärteten Lagerring vorgesehen. Zur Verbesserung der Härtbarkeit und Vergütung mittels induktiver Randhärtung besteht der Werkstoff für den zumindest einen Lagerring aus Nickel-Vanadium-legiertem Stahl des Typs 56NiCrMoV7 (1.2714).The proposed material is provided for a rolling bearing with at least one slip-free inductively surface hardened bearing ring. To improve the hardenability and tempering by means of inductive edge hardening, the material for the at least one bearing ring consists of nickel-vanadium-alloyed steel of the type 56NiCrMoV7 (1.2714).
Der vorgeschlagene Werkstoff weist im Vergleich zu den Stahllegierungen XXCrMo4 mit XX gleich 42 oder 50 aufgrund des erhöhten Nickelgehalts bei vergleichbaren Chromgehalten und leicht verringerten Mangangehalten eine deutlich höhere Härtbarkeit auf. Durch die Verwendung des Legierungsbestandteils Vanadium kann die Vergütung erhöht werden.The proposed material has a significantly higher hardenability compared to the steel alloys XXCrMo4 with XX equal to 42 or 50 due to the increased nickel content at comparable chromium contents and slightly reduced manganese contents. By using the alloying component vanadium, the remuneration can be increased.
Der vorgeschlagene Werkstoff kann weniger schroff, beispielsweise im Ölbad oder dergleichen, abgeschreckt werden, so dass mittels eines Vergütungsprozesses die Homogenität des Vergütungsgefüges über den Querschnitt des zumindest einen Lagerrings beispielsweise von der Randschicht in den Kern zunimmt und Härterisse vermieden werden können. Mittels des verwendeten Werkstoffs kann eine signifikant höhere Durchvergütung erzielt werden.The proposed material can be less abruptly quenched, for example in an oil bath or the like, so that by means of a tempering process, the homogeneity of the compensation structure over the cross section of the at least one bearing ring, for example, from the surface layer increases in the core and hardening cracks can be avoided. By means of the material used, a significantly higher throughput can be achieved.
Durch den vergleichsweise höheren Kohlenstoffgehalt des vorgeschlagenen Werkstoffs kann eine vergleichsweise höhere Härte von mehr als 650 HV als für die Stahllegierungen XXCrMo4 erzielt werden.Due to the comparatively higher carbon content of the proposed material, a comparatively higher hardness of more than 650 HV can be achieved than for the steel alloys XXCrMo4.
In dem Nickel-Vanadium-legierter Stahl 56NiCrMoV7 sind vorzugsweise weiterhin folgende Legierungsbestandteile vorgesehen:
- bis 0,015 Gew.-% Phosphor,
- bis 0,010 Gew.-% Schwefel,
- bis 0,25 Gew.-% Kupfer,
- bis 0,0030 Gew.-% Titan,
- bis 0,0400 Gew. % Arsen,
- bis 0,0300 Gew.-% Zinn,
- bis 0,0050 Gew.-% Antimon,
- bis 0,0020 Gew.-% Blei,
- bis 0,0010 Gew.-% Kalzium,
- bis 0,0002 Gew.-% Wasserstoff (H2),
- bis 0,0012 Gew.-% Sauerstoff,
- 0,02 bis 0,040 Gew.-% Aluminium,
- wobei ein Aluminium-Stickstoffverhältnis im Bereich von 2 bis 4 vorliegt.
- up to 0.015% by weight phosphorus,
- up to 0.010% by weight of sulfur,
- to 0.25% by weight of copper,
- up to 0.0030% by weight of titanium,
- up to 0.0400% by weight of arsenic,
- up to 0.0300% by weight of tin,
- up to 0.0050% by weight of antimony,
- to 0.0020% by weight of lead,
- up to 0.0010% by weight of calcium,
- up to 0.0002% by weight of hydrogen (H 2 ),
- to 0.0012% by weight of oxygen,
- 0.02 to 0.040% by weight of aluminum,
- wherein an aluminum-nitrogen ratio is in the range of 2 to 4.
Das Wälzlager enthält zumindest einen induktiv schlupffrei randschichtgehärteten Lagerring, beispielsweise einen Innenring und/oder einen Außenring, und über den Umfang verteilt auf Laufflächen dieser abwälzende Wälzkörper, beispielsweise Kugeln, Rollen, Kegeln, Nadeln, Tonnen oder dergleichen auf. Zumindest ein Lagerring ist aus dem zuvor vorgeschlagenen Werkstoff, nämlich aus Nickel-Vanadium-legiertem Stahl 56NiCrMoV7 hergestellt. Es können aber auch die Wälzkörper derart ausgebildet sein.The rolling bearing contains at least one induction slip-free surface hardened bearing ring, for example, an inner ring and / or an outer ring, and distributed over the circumference on running surfaces of these rolling rolling elements, such as balls, rollers, cones, needles, tons or the like. At least one bearing ring is made of the previously proposed material, namely nickel-vanadium-alloyed steel 56NiCrMoV7. But it can also be designed such the rolling elements.
Das Wälzlager weist vorzugsweise einen Außendurchmesser größer 700 mm auf. Dementsprechend kann ein, als Außenring vorgesehener, aus dem vorgeschlagenen Werkstoff gebildeter Lagerring einen Durchesser größer 700 mm und/oder ein gegebenenfalls zum Wälzlager zugehöriger Innenring einen kleineren Durchmesser aufweisen.The rolling bearing preferably has an outer diameter greater than 700 mm. Accordingly, a bearing ring provided as an outer ring and formed from the proposed material may have a diameter greater than 700 mm and / or an inner ring optionally associated with the rolling bearing may have a smaller diameter.
Der vorgeschlagene Werkstoff eignet sich insbesondere für Lagerringe, welche eine Wandstärke größer 150 mm aufweisen. Bei derart großen Wandstärken ist die Möglichkeit der verbesserten Ausbildung einer Homogenität des Vergütungsgefüges über den Querschnitt des Lagerrings und beispielsweise eine qualitativ hochwertige Durchvergütung besonders vorteilhaft.The proposed material is particularly suitable for bearing rings, which have a wall thickness greater than 150 mm. With such large wall thicknesses, the possibility of improved formation of a homogeneity of the compensation structure over the cross section of the bearing ring and, for example, a high-quality through-coating is particularly advantageous.
Das Wälzlager enthält vorzugsweise zumindest einen Lagerring aus dem vorgeschlagenen Werkstoff, dessen Oberflächenhärte wie Randhärte größer 650 HV ist. Eine derartige Randhärte kann mittels des vorgeschlagenen Werkstoffs auch bei großen Durchmessern und/oder großen Breiten des Lagerrings über die gesamte Oberfläche oder an den Laufflächen der Wälzkörper samt den erforderlichen Umgebungsbereichen dieser erzielt werden.The rolling bearing preferably contains at least one bearing ring made of the proposed material whose surface hardness, such as edge hardness, is greater than 650 HV. Such edge hardness can be achieved by means of the proposed material, even with large diameters and / or large widths of the bearing ring over the entire surface or on the running surfaces of the rolling elements together with the required surrounding areas thereof.
Das Wälzlager erlaubt, den zumindest einen Lagerring in einem induktiven Härteprozesses, hier einem induktiv schlupffrei geführten Randschichthärteprozess und/oder Vergütungsprozess mit geringerem Temperaturgradienten pro Zeiteinheit zu härten beziehungsweise zu vergüten, das heißt, diesen weniger schroff, beispielsweise im Ölbad oder dergleichen, abzuschrecken als einen vergleichbaren Lagerring aus einer Stahllegierung XXCrMo4, die zur Erzielung vergleichbarer Härten mit der Gefahr von Härterissen in der Regel in wässrigen Salzlösungen abgeschreckt werden muss. Hierdurch kann eine verbesserte Vergütungsqualität, insbesondere an den Übergängen von der Randhärtung zum nicht oder weniger gehärteten Kern des Lagerrings erzielt werden.The rolling bearing allows the at least one bearing ring in an inductive hardening process, here an inductive slip-guided edge hardening process and / or tempering process with lower temperature gradients per unit time to cure or to compensate, that is, this less abrupt, for example, in the oil bath or the like, deter as a comparable bearing ring made of a steel alloy XXCrMo4, which must be quenched to achieve comparable hardness with the risk of hardening cracks usually in aqueous salt solutions. In this way, an improved quality of compensation, in particular at the transitions from the edge hardening to the non-hardened or less hardened core of the bearing ring can be achieved.
Das Wälzlager ist für Anwendungen mit großen Lagerdurchmessern vorgesehen. Erfindungsgemäß wird das Wälzlager zur Bildung einer Lagerung eines Rotors einer Hauptrotorlagerung einer Windkraftanlage gegenüber einem Gehäuse vorgesehen. Weiterhin wird das Wälzlager erfindungsgemäß zur Bildung einer Getriebelagerung, insbesondere im Schwermaschinenbau, Schiffsbau, Turbinenbau und dergleichen, eingesetzt.The rolling bearing is intended for applications with large bearing diameters. According to the invention, the rolling bearing is provided to form a bearing of a rotor of a main rotor bearing of a wind turbine with respect to a housing. Furthermore, the rolling bearing according to the invention is used to form a gearbox bearing, in particular in heavy machinery, shipbuilding, turbine construction and the like.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102005006701 B3 [0003]DE 102005006701 B3 [0003]
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/DE2018/100964 WO2019114864A1 (en) | 2017-12-14 | 2018-11-28 | Main rotor mounting or transmission mounting |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102017129963 | 2017-12-14 | ||
DE102017129963.7 | 2017-12-14 |
Publications (1)
Publication Number | Publication Date |
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DE102018129696A1 true DE102018129696A1 (en) | 2019-06-19 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102018129696.7A Withdrawn DE102018129696A1 (en) | 2017-12-14 | 2018-11-26 | Main rotor bearing or gearbox mounting |
Country Status (2)
Country | Link |
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DE (1) | DE102018129696A1 (en) |
WO (1) | WO2019114864A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005006701B3 (en) | 2005-02-15 | 2006-03-30 | Rothe Erde Gmbh | Production of bearing ring for large rolling bearing comprises arranging inductors over common zone of annular track to be hardened, heating the opposite-lying edge layer to the hardening temperature and further processing |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0881738A (en) * | 1994-09-12 | 1996-03-26 | Daido Steel Co Ltd | Steel for induction hardening excellent in high bearing fatigue strength |
DE102008062920A1 (en) * | 2008-12-23 | 2010-07-01 | Gühring Ohg | Method for producing a tool system module |
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2018
- 2018-11-26 DE DE102018129696.7A patent/DE102018129696A1/en not_active Withdrawn
- 2018-11-28 WO PCT/DE2018/100964 patent/WO2019114864A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005006701B3 (en) | 2005-02-15 | 2006-03-30 | Rothe Erde Gmbh | Production of bearing ring for large rolling bearing comprises arranging inductors over common zone of annular track to be hardened, heating the opposite-lying edge layer to the hardening temperature and further processing |
Also Published As
Publication number | Publication date |
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WO2019114864A1 (en) | 2019-06-20 |
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