EP0885949B1 - Use of a grease composition for maintenance-free articulated transmission shaft - Google Patents
Use of a grease composition for maintenance-free articulated transmission shaft Download PDFInfo
- Publication number
- EP0885949B1 EP0885949B1 EP98109053A EP98109053A EP0885949B1 EP 0885949 B1 EP0885949 B1 EP 0885949B1 EP 98109053 A EP98109053 A EP 98109053A EP 98109053 A EP98109053 A EP 98109053A EP 0885949 B1 EP0885949 B1 EP 0885949B1
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- EP
- European Patent Office
- Prior art keywords
- percent
- weight
- lubricant
- mixture
- molybdenum
- Prior art date
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- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- 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
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- C10M2229/048—Siloxanes with specific structure containing carboxyl groups
- C10M2229/0485—Siloxanes with specific structure containing carboxyl groups used as base material
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- 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
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- C10M2229/04—Siloxanes with specific structure
- C10M2229/05—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon
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- 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
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- 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
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- C10M2229/04—Siloxanes with specific structure
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- C10M2229/0515—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon containing halogen used as base material
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- 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
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- C10M2229/04—Siloxanes with specific structure
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- C10M2229/0525—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon containing nitrogen used as base material
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- 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
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- C10M2229/0535—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon containing sulfur used as base material
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- 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
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- C10M2229/054—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon containing phosphorus
- C10M2229/0545—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon containing phosphorus used as base material
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/02—Groups 1 or 11
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/10—Groups 5 or 15
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/12—Groups 6 or 16
Definitions
- the invention relates to the use of a lubricant for maintenance-free Cardan shafts.
- German patent application 195 30 504 is already a grease known that even at high temperatures can be used in constant velocity joints with can be produced with little effort and as a permanent solid lubricant filling to an increased lifespan of constant velocity joints leads. It contains mineral and / or as a basis synthetic oils, urea compounds as thickeners and Molybdenum sulfide as a dispersed solid lubricant as well additionally graphite, polytetrafluoroethylene and at least one organic molybdenum compound.
- organic phosphates in the lubricating oils described there Contain phosphines, phosphonates or phosphites that are suitable for the Improve the properties of the lubricant as a whole be viewed critically.
- Such lubricants are characterized by a content of inorganic molybdenum disulfide and are suitable for homokinetic constant velocity joints, but do not give good when used in universal joint shafts Services.
- this object is achieved through the use of a lubricant solved according to claim 1.
- a suitable basis for the lubricant Mineral oils and / or synthetic hydrocarbon oils is a naphthenic solvent raffinate, which by a combination of naphthenic base mineral oil with one synthetic hydrocarbon oil in a ratio of 1: 3 until 1: 5 is obtained.
- a paraffinic solvent refinate suitable which is a mixture of a paraffin base mineral oil with a synthetic hydrocarbon oil in a ratio of 1: 3 to 1: 5 and a viscosity of about 100 to 150 centistokes at 40 ° C.
- the lubricant contains a complex as a thickener Lithium soap made from a mixture of a saturated or unsaturated, aliphatic mono- or dicarboxylic acid with 10 to 24, preferably 16 to 18 carbon atoms and other acids is formed.
- a complex as a thickener Lithium soap made from a mixture of a saturated or unsaturated, aliphatic mono- or dicarboxylic acid with 10 to 24, preferably 16 to 18 carbon atoms and other acids is formed.
- a complex as a thickener Lithium soap made from a mixture of a saturated or unsaturated, aliphatic mono- or dicarboxylic acid with 10 to 24, preferably 16 to 18 carbon atoms and other acids is formed.
- the lithium salt of 12-hydroxstearic acid with the lithium salts of azelaic acid, the Sebacic acid or boric acid have thickeners for Lubricants have already found multiple uses because of them at higher temperatures than the simple lithium soaps can be used.
- the lithium salts of aliphatic, Mono- or dicarboxylic acids have proven themselves particularly well as thickeners of lubricants.
- the lithium salt is added to the base fat in an amount of 5 to 20 percent by weight based on the amount of base fat admitted.
- control oils are olefin copolymers, Polybutenes, polyol esters, polyalfaolefins, perfluoropolyethers, Polysiloxanes and hydrogenated diene-styrene copolymers are suitable. They are generally added to the base fat in an amount of 2 up to 40 percent by weight based on the total amount of Lubricant added.
- antioxidants sterically hindered phenols and Amines, for example phenyl- ⁇ -naphthylamine.
- the right properties of the lubricant are also achieved by being next to others Additives dithiocarbamates or dithiophosphates of molybdenum, in combination with a thiadiazole derivative contains. Molybdenum dithiophosphate and molybdenum dithiocarbamate have proven themselves particularly well. Such molybdenum compounds together with a 1-thia-3,4-diazole or his sulfur-bridged dimers are used, then the Lubrication properties both at high temperatures as well so strong with mechanical loads in the long term improved that the lubrication of the pin sets when Manufacturer for the entire service life of the commercial vehicle is sufficient.
- an anti-corrosion agent such as N-acyl sarcosine and / or one High pressure additive such as methylene bis (dibutyl dithio carbamate) Lubricant clogged.
- an anti-corrosion agent such as N-acyl sarcosine and / or one High pressure additive such as methylene bis (dibutyl dithio carbamate) Lubricant clogged.
- the amount of added Additives in a quantity range from 2 to 10 Percent by weight, based on the total lubricant, lie.
- the lubricant is manufactured so that the by reacting lithium hydroxide with a aliphatic mono- or dicarboxylic acid, produced lithium salts to be dissolved or suspended in the base and part of the Additives to the control oil is added. These two mixes are then at an elevated temperature between 80 to 240 ° C. a stirring or mixing device mixed together. High pressure homogenizers have been used to manufacture the Lubricant with a uniform and particularly homogeneous distribution of its ingredients proven. The temperature sensitive additives are just before added to the homogenization.
- a lubricant according to the invention with the following general composition was produced: 1st base 1.0 Percent by weight Aryl carboxylic acid 1.0 Percent by weight Alkyl sulfonic acid 3.0 Percent by weight aliphatic dicarboxylic acids with 6 to 10 carbon atoms 8.0 Percent by weight aliphatic monocarboxylic acids with 12 to 22 carbon atoms or their glycerides 3.0 Percent by weight Lithium hydroxide 43.0 Percent by weight naphthenic solvent refinate
- This mixture is contained in the lubricant according to the invention in an amount of 53 percent by weight.
- Synthetic control components 6.0 Percent by weight Olefin copolymer 18.0 Percent by weight Polyol ester 76.0 Percent by weight Poly- ⁇ -olefins
- This mixture is contained in the lubricant according to the invention in an amount of 40 percent by weight.
- Additives 0.5 Percent by weight aminic antioxidant 0.5 Percent by weight Carboxylic acid alkanolamide 2.0 Percent by weight Molybdenum compound 1.0 Percent by weight vegetable oil 1.0 Percent by weight Sarcosine derivative 2.0 Percent by weight Thiadiazole derivative
- This mixture is in the lubricant in an amount of 7 Weight percent included.
- a further lubricant according to the invention with the following general composition was produced: 1st base 2.0 Percent by weight Boric acid 14.0 Percent by weight Monocarboxylic acids with 12 to 22 carbon atoms or their glycerides 1.0 Percent by weight Polycarboxylic acid 3.0 Percent by weight Lithium hydroxide 66.0 Percent by weight paraffinic solvent refinate
- This mixture is contained in the lubricant according to the invention in an amount of 86 percent by weight.
- Synthetic control components 12.0 Percent by weight Olefin copolymers 36.0 Percent by weight Polyol ester 52.0 Percent by weight Poly- ⁇ -olefin
- This mixture is contained in the lubricant according to the invention in an amount of 7 percent by weight.
- Additives 0.5 Percent by weight aminic antioxidant 0.5 Percent by weight Carboxylic acid alkanolamide 2.0 Percent by weight Molybdenum compound 1.0 Percent by weight vegetable oil 1.0 Percent by weight Sarcosine derivative 2.0 Percent by weight Thiadiazole derivative
- This mixture is in the lubricant according to the invention in an amount of 7 percent by weight.
- Example 1 8 universal joints with the lubricant according to the invention from Example 1 and 6 universal joints with a standard lubricant of the following composition were compared: 1st base 2.0 Percent by weight Boric acid 14.0 Percent by weight Monocarboxylic acids with 12 to 22 carbon atoms or their glycerides 1.0 Percent by weight Polycarboxylic acid 3.0 Percent by weight Lithium hydroxide 66.0 Percent by weight paraffinic solvent refinate
- the standard lubricant contains 5 percent by weight of this component.
- Additives 0.5 Percent by weight aminic antioxidant 0.7 Percent by weight Carboxylic acid alkanolamide 1.0 Percent by weight Imidazoline derivative 1.0 Percent by weight vegetable oil 0.5 Percent by weight phenolic antioxidant 1.0 Percent by weight Thiadiazole derivative 2.5 Percent by weight Zinc dialkyl dithiophosphate 1.5 Percent by weight Zinc naphthenate
- the mixture of these additives is in the standard lubricant contained in an amount of 9 percent by weight.
- the B10 value for the tested joints describes the determined service life at which 90% of the joints are not yet have failed.
- the B63.2 value describes the same determined lifespan at which 36.8% of the universal joints still have not failed.
- Fig. 1 shows the graphical representation of this experiment. It it can be seen that the runtime when using the Lubricant is significantly higher than that of the Use of the standard lubricant, the failure-free Time must be added according to the table. This is in the Diagram listed again as t0 in the box at the bottom right.
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- Chemical & Material Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Lubricants (AREA)
Description
Gegenstand der Erfindung ist die Verwendung einer Schmierstoffes für wartungsfreie Gelenkwellen.The invention relates to the use of a lubricant for maintenance-free Cardan shafts.
Aus der deutschen Offenlegungsschrift 195 30 504 ist bereits ein Schmierfett bekannt, das auch bei hoher Temperaturbelastung in Gleichlaufgelenken angewendet werden kann, mit geringem Aufwand herstellbar ist und als permanente Festschmierstoffüllung zu einer erhöhten Lebensdauer von Gleichlaufgelenken führt. Es enthält als Basis mineralische und/oder synthetische Öle, Harnstoff-Verbindungen als Verdicker und Molybdänsulfid als dispergierten Festschmierstoff sowie zusätzlich Graphit, Polytetrafluorethylen und wenigstens eine molybdänorganische Verbindung. Weiterhin ist aus der internationalen Patentanmeldung WO 97/03152 die Verwendung von Molybdändisulfid, Zinknaphthenat und einem oder mehreren Metalldithiophosphaten als eine Reibung vermindernde Additivmischung in Schmierölen auf Basis eines mineralischen und/oder synthetischen Öles bekannt. Darüberhinaus ist aus der internationalen Patentanmeldung WO 94/11470 ein Lithiumseifen enthaltendes Schmierfett bekannt, dem Dithiocarbamate oder Dithiophosphate des Molybdäns im Gemisch mit Dithiocarbamaten oder Dithiophosphaten des Wismuts, des Bleis, des Antimons und anderer Schwermetalle bei gleichzeitiger Anwesenheit unterschiedlicher organischer Schwefelverbindungen, unter denen sich auch Thiadiazole befinden, zugesetzt sind. Außerdem sind in den dort beschriebenen Schmierölen organische Phosphate, Phosphine, Phosphonate oder Phosphite enthalten, die für die Verbesserung der Eigenschaften des Schmierstoffes als ganz entscheidend angesehen werden. Derartige Schmierstoffe sind durch einen Gehalt an anorganischem Molybdändisulfid gekennzeichnet und eignen sich für homokinetische Gleichlaufgelenke, geben aber beim Einsatz in Kreuzgelenkwellen keine guten Leistungen.From the German patent application 195 30 504 is already a grease known that even at high temperatures can be used in constant velocity joints with can be produced with little effort and as a permanent solid lubricant filling to an increased lifespan of constant velocity joints leads. It contains mineral and / or as a basis synthetic oils, urea compounds as thickeners and Molybdenum sulfide as a dispersed solid lubricant as well additionally graphite, polytetrafluoroethylene and at least one organic molybdenum compound. Furthermore, from the international Patent application WO 97/03152 the use of Molybdenum disulfide, zinc naphthenate and one or more Metal dithiophosphates as a friction reducing additive mixture in lubricating oils based on a mineral and / or known synthetic oils. Furthermore, from the international patent application WO 94/11470 a lithium soap containing grease known, the dithiocarbamate or Dithiophosphates of molybdenum mixed with dithiocarbamates or dithiophosphates of bismuth, lead, antimony and other heavy metals in the presence of different ones organic sulfur compounds, among which there are also thiadiazoles added. Also are organic phosphates in the lubricating oils described there, Contain phosphines, phosphonates or phosphites that are suitable for the Improve the properties of the lubricant as a whole be viewed critically. Such lubricants are characterized by a content of inorganic molybdenum disulfide and are suitable for homokinetic constant velocity joints, but do not give good when used in universal joint shafts Services.
Es besteht deshalb ein Bedarf bei der Entwicklung von wartungsfreien Kreuzgelenkwellen, insbesondere Kreuzgelenkgarnituren für schwere Nutzfahrzeuge durch eine Verbesserung der Eigenschaften von Schmierstoffen die Laufleistung, die Wirtschaftlichkeit und die Umweltverträglichkeit von Teilen der Nutzfahrzeuge zu verbessern.There is therefore a need to develop maintenance-free universal joint shafts, especially universal joint sets for heavy commercial vehicles by improving the Properties of lubricants the mileage that Economy and environmental compatibility of parts to improve commercial vehicles.
Erfindungsgemäß wird diese Aufgabe durch die Verwendung einer Schmierstoffes
nach Anspruch 1 gelöst. According to the invention, this object is achieved through the use of a lubricant
solved according to
Für den Schmierstoff eignen sich als Basis Mineralöle und/oder synthetische Kohlenwasserstofföle. Bevorzugt wird ein naphthenisches Solventraffinat, das durch eine Kombination von Naphthenbasismineralöl mit einem synthetischen Kohlwasserstofföl in einem Verhältnis von 1:3 bis 1:5 erhalten wird. Ebenso ist ein paraffinisches Solventraffinat geeignet, das eine Mischung eines Paraffinbasismineralöls mit einem synthetischen Kohlenwasserstofföl in einem Verhältnis von 1:3 bis 1:5 ist und eine Viskosität von etwa 100 bis 150 Centistoke bei 40°C aufweist.A suitable basis for the lubricant Mineral oils and / or synthetic hydrocarbon oils. Preferred is a naphthenic solvent raffinate, which by a combination of naphthenic base mineral oil with one synthetic hydrocarbon oil in a ratio of 1: 3 until 1: 5 is obtained. Also a paraffinic solvent refinate suitable, which is a mixture of a paraffin base mineral oil with a synthetic hydrocarbon oil in a ratio of 1: 3 to 1: 5 and a viscosity of about 100 to 150 centistokes at 40 ° C.
Der Schmierstoff enthält als Verdicker eine Komplexe Lithiumseife, die aus einer Mischung von einer gesättigten oder ungesättigten, aliphatischen Mono- oder Dicarbonsäure mit 10 bis 24, vorzugsweise 16 bis 18 Kohlenstoffatomen und anderer Säuren gebildet wird. Vor allem Mischungen des Lithiumsalzes der 12-Hydroxstearinsäure mit den Lithiumsalzen der Azelainsäure, der Sebacinsäure oder der Borsäure haben als Verdickungsmittel für Schmierstoffe bereits vielfache Verwendung gefunden, weil sie bei höheren Temperaturen als die einfachen Lithiumseifen eingesetzt werden können.The lubricant contains a complex as a thickener Lithium soap made from a mixture of a saturated or unsaturated, aliphatic mono- or dicarboxylic acid with 10 to 24, preferably 16 to 18 carbon atoms and other acids is formed. Especially mixtures of the lithium salt of 12-hydroxstearic acid with the lithium salts of azelaic acid, the Sebacic acid or boric acid have thickeners for Lubricants have already found multiple uses because of them at higher temperatures than the simple lithium soaps can be used.
Auch die Lithiumsalze von aliphatischen, Mono- oder Dicarbonsäuren haben sich als Verdicker von Schmierstoffen besonders bewährt. Das Lithiumsalz wird dem Basisfett in einer Menge von 5 bis 20 Gewichtsprozent, bezogen auf die Menge des Basisfetts zugegeben. The lithium salts of aliphatic, Mono- or dicarboxylic acids have proven themselves particularly well as thickeners of lubricants. The lithium salt is added to the base fat in an amount of 5 to 20 percent by weight based on the amount of base fat admitted.
Zum Erreichen eines während des Betriebes möglichst flachen Viskositäts-Temperatur-Verlaufes werden dem Basisfett ein oder mehrere Stellöle zugegeben, in welchen die Additive bereits gelöst sein können. Als Stellöle sind Olefincopolymere, Polybutene, Polyolester, Polyalfaolefine, Perfluorpolyether, Polysiloxane und hydrierte Dien-Styrol-Copolymere geeignet. Sie werden dem Basisfett im allgemeinen in einer Menge von 2 bis 40 Gewichtsprozent, bezogen auf die Gesamtmenge des Schmierstoffes zugegeben.To achieve a flat as possible during operation The viscosity-temperature curve becomes one or more of the base fat added several control oils, in which the additives already can be solved. As control oils are olefin copolymers, Polybutenes, polyol esters, polyalfaolefins, perfluoropolyethers, Polysiloxanes and hydrogenated diene-styrene copolymers are suitable. They are generally added to the base fat in an amount of 2 up to 40 percent by weight based on the total amount of Lubricant added.
Um den Schmierstoff gegen die hohen thermischen und mechanischen Beanspruchungen zu stabilisieren, die bei seiner Anwendung in der Lagerung des Zapfenkreuzes auftreten, müssen ihm Additive zugesetzt werden. Als Antioxydantien eignen sich hierfür sterisch gehinderte Phenole und Amine, zum Beispiel Phenyl-α-naphthylamine.To the lubricant against the high stabilize thermal and mechanical loads, which in its application in the bearing of the cross Additives have to be added to it. As antioxidants sterically hindered phenols and Amines, for example phenyl-α-naphthylamine.
Die richtigen Eigenschaften des Schmierstoffes werden zudem dadurch erreicht, daß er neben anderen Additiven Dithiocarbamate oder Dithiophosphate des Molybdäns, in Kombination mit einem Thiadiazol-Derivat enthält. Molybdän-dithiophosphate und Molybdändithiocarbamate haben sich ganz besonders bewährt. Werden derartige Molybdänverbindungen zusammen mit einem 1-Thia-3,4-diazol oder seinem schwefelverbrückten Dimeren eingesetzt, dann werden die Schmiereigenschaften sowohl bei hohen Temperaturen als auch bei mechanischen Belastungen auf dauerhafte Weise so stark verbessert, daß die Schmierung der Zapfengarnituren beim Hersteller für die ganze Lebensdauer des Nutzfahrzeuges ausreicht. The right properties of the lubricant are also achieved by being next to others Additives dithiocarbamates or dithiophosphates of molybdenum, in combination with a thiadiazole derivative contains. Molybdenum dithiophosphate and molybdenum dithiocarbamate have proven themselves particularly well. Such molybdenum compounds together with a 1-thia-3,4-diazole or his sulfur-bridged dimers are used, then the Lubrication properties both at high temperatures as well so strong with mechanical loads in the long term improved that the lubrication of the pin sets when Manufacturer for the entire service life of the commercial vehicle is sufficient.
Weitere Verbesserung lassen sich dadurch erreichen, daß man ein Korrosionsschutzmittel wie N-Acyl-Sarkosin und/oder einen Hochdruckzusatz wie Methylen-bis(dibutyl-dithio-carbamat) dem Schmierstoff zusetzt. Insgesamt soll die Menge der zuzusetzenden Additive in einem Mengenbereich von 2 bis 10 Gewichtsprozent, bezogen auf den gesamten Schmierstoff, liegen.Further improvement can be achieved in that an anti-corrosion agent such as N-acyl sarcosine and / or one High pressure additive such as methylene bis (dibutyl dithio carbamate) Lubricant clogged. Overall, the amount of added Additives in a quantity range from 2 to 10 Percent by weight, based on the total lubricant, lie.
Die Herstellung des Schmierstoffes erfolgt so, daß die durch Umsetzung von Lithiumhydroxyd mit einer aliphatischen Mono- oder Dicarbonsäure, hergestellten Lithiumsalze in der Basis gelöst oder suspendiert werden und ein Teil der Additive dem Stellöl zugegeben wird. Diese beiden Mischungen werden dann bei erhöhter Temperatur zwischen 80 bis 240°C in einer Rühr- oder Mischvorrichtung miteinander vermischt. Hochdruckhomogenisatoren haben sich für die Herstellung des Schmierstoffes mit einer gleichmäßigen und homogenen Verteilung seiner Inhaltsstoffe ganz besonders bewährt. Die temperaturempfindlichen Additive werden erst vor dem Homogenisieren zugegeben.The lubricant is manufactured so that the by reacting lithium hydroxide with a aliphatic mono- or dicarboxylic acid, produced lithium salts to be dissolved or suspended in the base and part of the Additives to the control oil is added. These two mixes are then at an elevated temperature between 80 to 240 ° C. a stirring or mixing device mixed together. High pressure homogenizers have been used to manufacture the Lubricant with a uniform and particularly homogeneous distribution of its ingredients proven. The temperature sensitive additives are just before added to the homogenization.
Die folgenden Beispiel zeigen Rezepturen des Schmierstoffes, die sich zur Lebensdauerschmierung von Zapfenkreuzlagerungen von Kreuzgelenken als hervorragend geeignet erwiesen haben: The following examples show recipes of the Lubricant that can be lubricated for life Pin cross bearings of universal joints as excellent have proven suitable:
Es wurde ein erfindungsgemäßer Schmierstoff mit folgender
allgemeiner Zusammensetzung hergestellt:
Diese Mischung ist in dem erfindungsgemäßen Schmierstoff in
einer Menge von 53 Gewichtsprozent enthalten.
Diese Mischung ist in dem erfindungsgemäßen Schmierstoff in
einer Menge von 40 Gewichtsprozent enthalten.
Diese Mischung ist in dem Schmierstoff in einer Menge von 7 Gewichtsprozent enthalten.This mixture is in the lubricant in an amount of 7 Weight percent included.
Es wurde ein weiterer erfindungsgemäßer Schmierstoff mit
folgender allgemeiner Zusammensetzung hergestellt:
Diese Mischung ist in dem erfindungsgemäßen Schmierstoff in
einer Menge von 86 Gewichtsprozent enthalten.
Diese Mischung ist in dem erfindungsgemäßen Schmierstoff in
einer Menge von 7 Gewichtsprozent enthalten.
Diese Mischung ist in dem erfindungsgemäßen Schmierstoff in einer Menge von 7 Gewichtsprozent enthalten.This mixture is in the lubricant according to the invention in an amount of 7 percent by weight.
Zur Beurteilung der Leistungsfähigkeit der erfindungsgemäßen
Schmierstoffe wurde der Schmierstoff gemäß der Rezeptur von
Beispiel 1 einem Lebensdauerausfalltest an Kreuzgelenken
unterworfen. Dabei wurden 8 Kreuzgelenke mit dem erfindungsgemäßen
Schmierstoff von Beispiel 1 und 6 Kreuzgelenke mit
einem Standardschmierstoff folgender Zusammensetzung verglichen:
Diese Mischung ist in dem Standardschmierstoff in einer Menge
von 86 Gewichtsprozent enthalten.
Diese Komponente ist zu 5 Gewichtsprozent in dem Standardschmierstoff
enthalten.
Die Mischung dieser Additive ist in dem Standardschmierstoff in einer Menge von 9 Gewichtsprozent enthalten.The mixture of these additives is in the standard lubricant contained in an amount of 9 percent by weight.
Der vorstehend genannte Standardschmierstoff und der
Schmierstoff gemäß Beispiel 1 ergaben bei einer
Auswertung der Lebensdauereinzelwerte mittels Weibull-Verteilung
(VDA: Qualitätskontrolle der Automobilindustrie:
Zuverlässigkeitssicherung bei Automobilherstellern und
Lieferanten, Verfahren und Beispiele; Verband der Automobilindustrie
e.V. (VDA), Westendstraße 61, Frankfurt am Main,
1976) eine deutlich verbesserte Lebensdauer beim Einsatz des
Schmierstoffes. Die Kreuzgelenke wurden bei
der Durchführung des Versuches einer Umgebungstemperatur von
80°C ausgesetzt. Als Ausfall wurde ein Überschreiten der
Außentemperatur von 100°C, gemessen am Boden der Lagerbüchse
der Zapfenkreuzgarnitur des Kreuzgelenkes, gewertet. Bei
Verwendung des Schmierstoffes wurden
deutlich höhere B10- und B63,2-Werte erzielt.
Hierbei beschreibt der B10-Wert für die geprüften Gelenke die ermittelte Lebensdauer, bei der 90% der Gelenke noch nicht ausgefallen sind. Analog beschreibt der B63,2-Wert die ermittelte Lebensdauer, bei der 36,8% der Kreuzgelenke noch nicht ausgefallen sind.The B10 value for the tested joints describes the determined service life at which 90% of the joints are not yet have failed. The B63.2 value describes the same determined lifespan at which 36.8% of the universal joints still have not failed.
Fig. 1 zeigt die grafische Darstellung dieses Versuches. Es ist ersichtlich, daß die Laufzeit bei Verwendung des Schmierstoffes deutlich höher ist als bei der Verwendung des Standard-Schmierstoffes, wobei die ausfallfreie Zeit gemäß Tabelle hinzuaddiert werden muß. Diese ist in dem Diagramm als t0 im Kästchen unten rechts nochmals aufgeführt.Fig. 1 shows the graphical representation of this experiment. It it can be seen that the runtime when using the Lubricant is significantly higher than that of the Use of the standard lubricant, the failure-free Time must be added according to the table. This is in the Diagram listed again as t0 in the box at the bottom right.
Claims (3)
- Use of a lubricant for cardan joints comprisingand further, in lubricants normally used antioxidants, corrosion inhibitors and high-pressure additives.a) a base selected from the group consisting of a naphthenic solvent or a paraffinic solvent or a mixture thereofb) 5 to 20 percent by weight, calculated on the amount of the base, of a complex lithium soap consisting of a mixture of a saturated or a unsaturated, aliphatic mono- or dicarbonic acid with 10 to 24 carbon atoms and other acids,c) 2 to 40 percent by weight, calculated on the total amount of the lubricant, of several flux oils selected from the group consisting of a olefin copolymer, a polybutene, a polyol ester, a poly-α-olefin, a perfluoropolyether, a polysiloxane or a hydrogenated diene-styrene copolymer andd) a molybdenum dithiocarbamate or a molybdenum dithio phosphate in combination with a thiadiazole derivative
- Use of a lubricant as claimed in claim 1, comprising as further additives amine antioxidants or phenolic antioxidants.
- Use of a lubricant as claimed in claims 1 and 2, comprising as a further additive N-acylsarcosine as a corrosion inhibitor.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19726127 | 1997-06-20 | ||
| DE19726127 | 1997-06-20 | ||
| DE19817055 | 1998-04-17 | ||
| DE19817055A DE19817055A1 (en) | 1997-06-20 | 1998-04-17 | Lubricant for maintenance-free cardan shafts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0885949A1 EP0885949A1 (en) | 1998-12-23 |
| EP0885949B1 true EP0885949B1 (en) | 2000-08-09 |
Family
ID=26037601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98109053A Expired - Lifetime EP0885949B1 (en) | 1997-06-20 | 1998-05-19 | Use of a grease composition for maintenance-free articulated transmission shaft |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6541427B1 (en) |
| EP (1) | EP0885949B1 (en) |
| JP (1) | JPH1121579A (en) |
| ES (1) | ES2152724T3 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2346892B (en) * | 1999-02-16 | 2002-10-09 | Gkn Technology Ltd | Grease for constant velocity joints |
| GB0002524D0 (en) * | 2000-02-04 | 2000-03-29 | Castrol Ltd | A process for producing organometallic dithio-compounds and the orgenometallic dithio-compounds produced therefrom |
| JP4238509B2 (en) * | 2002-02-27 | 2009-03-18 | Ｎｏｋクリューバー株式会社 | Grease composition |
| WO2005035700A1 (en) * | 2003-10-10 | 2005-04-21 | R.T. Vanderbilt Company, Inc. | Lubricating compositions containing synthetic ester base oil, molybdenum compounds and thiadiazole-based compounds |
| US7763574B2 (en) * | 2003-10-10 | 2010-07-27 | R.T. Vanderbilt Company, Inc. | Lubricating compositions containing synthetic ester base oil, molybdenum compounds and thiadiazole-based compounds |
| JP5158995B2 (en) | 2007-12-14 | 2013-03-06 | アール．ティー． ヴァンダービルト カンパニー インコーポレーティッド | Additive composition for EP grease having excellent wear resistance and corrosion characteristics |
| KR101080763B1 (en) * | 2009-09-21 | 2011-11-07 | 현대자동차주식회사 | Gasoline Engine oil composition of long-life cycle |
| KR101543039B1 (en) * | 2009-10-26 | 2015-08-10 | 현대자동차주식회사 | Method of Circuit Configuration of Inverter Capacitor Module Using Impedance Matching Method |
| CN102703168A (en) * | 2012-06-20 | 2012-10-03 | 津滨东宝(天津)科技发展有限公司 | Extreme pressure antiwear additive composition and application thereof to lubricating grease |
| WO2019133238A1 (en) | 2017-12-29 | 2019-07-04 | Exxonmobil Research And Engineering Company | Grease compositions for low temperatures operation |
| CN110804480A (en) * | 2018-08-06 | 2020-02-18 | 南京三佳万向节制造有限公司 | Lubricant for universal joint |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3533943A (en) * | 1966-11-10 | 1970-10-13 | Mobil Oil Corp | Lubricant compositions |
| FR2572089B3 (en) * | 1984-10-22 | 1987-04-10 | Raffinage Cie Francaise | LITHIUM SOAP GREASE |
| US4897210A (en) * | 1988-07-12 | 1990-01-30 | Pennzoil Products Company | Lithium complex grease thickener and high dropping point thickened grease |
| JP2576898B2 (en) | 1989-03-04 | 1997-01-29 | 日本石油株式会社 | Grease composition |
| US5368758A (en) * | 1992-10-13 | 1994-11-29 | The Lubrizol Corporation | Lubricants, greases and aqueous fluids containing additives derived from dimercaptothiadiazoles |
| GB9223945D0 (en) * | 1992-11-14 | 1993-01-06 | Gkn Technology Ltd | Greases |
| US5670461A (en) | 1994-08-19 | 1997-09-23 | Gkn Automotive Ag | High temperature lubricating grease containing urea compounds |
| JP3320569B2 (en) * | 1994-10-21 | 2002-09-03 | 協同油脂株式会社 | Grease composition for constant velocity joints |
| AU710294B2 (en) * | 1995-09-12 | 1999-09-16 | Lubrizol Corporation, The | Lubrication fluids for reduced air entrainment and improved gear protection |
| US5922654A (en) * | 1995-10-23 | 1999-07-13 | Nsk Ltd. | Lubricant composition |
-
1998
- 1998-05-19 EP EP98109053A patent/EP0885949B1/en not_active Expired - Lifetime
- 1998-05-19 ES ES98109053T patent/ES2152724T3/en not_active Expired - Lifetime
- 1998-06-19 JP JP10188073A patent/JPH1121579A/en active Pending
- 1998-06-22 US US09/102,390 patent/US6541427B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1121579A (en) | 1999-01-26 |
| US6541427B1 (en) | 2003-04-01 |
| ES2152724T3 (en) | 2001-02-01 |
| EP0885949A1 (en) | 1998-12-23 |
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