Wind power generation gear oil composition and preparation method thereof

Abstract

The present invention relates to the field of lubricating oil, and discloses a wind power generation gear oil composition and a preparation method thereof, the wind power generation gear oil composition comprises 0.5-2 wt% of an extreme pressure agent, 0.1-1 wt% of an anti-wear agent, 0.1-0.5 wt% of a sulfur-phosphorus-free friction modifier, 0.05-0.35 wt% of a metal deactivator, 0.15-1 wt% of an antioxidant, 0.02-0.2 wt% of an anti-rust agent, 0.5-2 wt% of solvent oil, and 0.005-0.05 wt% of an anti-foaming agent, 95-98 wt% of mixed base oil; wherein the extreme pressure agent is sulfurized olefin A and sulfurized olefin B, and the mass dosage ratio of the sulfurized olefin A to the sulfurized olefin B is 1: (1.5-4); the anti-wear agent is acidic phosphate amine salt; the sulfur and phosphorus-free friction modifier is boric acid modified oleic acid diethanolamide and / or boronized amide. The wind power generation gear oil composition can effectively prolong the oil change period of the wind power generation gear oil.

Description

Technical Field

[0001] This invention relates to the field of lubricating oils, and more specifically to a wind power gear oil composition and its preparation method. Background Technology

[0002] In recent years, with the rapid development of China's wind power industry, China's installed wind power capacity ranks among the top in the world, achieving independent control of the entire industrial chain from blades and gearboxes to main bearings.

[0003] Wind turbine gear oil is the core lubricating medium ensuring the stable operation of the transmission system (especially the gearbox) of wind turbine generators. Its performance directly affects the lifespan, reliability, and maintenance costs of wind power equipment. Because wind turbine gearboxes operate under harsh outdoor conditions such as low temperatures, dust storms, high humidity, and alternating loads, and are difficult and costly to maintain, the performance requirements for wind turbine gear oils are far higher than those for ordinary industrial gear oils. While existing domestically produced wind turbine gear oils can meet basic performance requirements, their design life is typically only 3-5 years, requiring frequent replacements and increasing maintenance costs. Furthermore, the antioxidant additive system in existing wind turbine gear oils is prone to failure under long-term high-load and variable-load conditions, leading to accelerated sludge formation, decreased lubrication performance, and shortened oil change intervals. As for imported wind turbine gear oils, their viscosity characteristics are unstable at low temperatures, exacerbating gearbox wear and affecting their lifespan. Long-life, high-reliability gear oil is crucial for ensuring the long-term stable operation of wind turbines. It can not only significantly reduce the cost of the entire life cycle of wind power, but also reduce downtime, improve power generation efficiency, and reduce the amount of waste oil to be disposed of, which is in line with the trend of green wind power development.

[0004] Therefore, breakthroughs in long-life wind turbine gear oil technology can not only ensure supply chain security, but also significantly reduce costs and increase efficiency by extending oil change intervals, thus contributing to the sustainable development of the industry in the era of grid parity for wind power. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems of insufficient lifespan and high cost of existing wind power gear oils, and to provide a wind power gear oil composition and its preparation method. This wind power gear oil composition solves the problem of oxidation and degradation of oil under long-term service, increases the oil change cycle of wind power gear oil, and reduces the overall cost of using wind power gear oil.

[0006] To achieve the above objectives, the present invention provides a wind power gear oil composition, which, by weight percentage, comprises: 0.5-2 wt% extreme pressure agent, 0.1-1 wt% anti-wear agent, 0.1-0.5 wt% sulfur-free phosphorus friction modifier, 0.05-0.35 wt% metal deactivator, 0.15-1 wt% antioxidant, 0.02-0.2 wt% rust inhibitor, 0.5-2 wt% solvent oil, 0.005-0.05 wt% antifoaming agent; and 95-98 wt% mixed base oil. The extreme pressure agent is sulfurized olefin A and sulfurized olefin B, and the mass ratio of sulfurized olefin A to sulfurized olefin B is 1:1.5~4; sulfurized olefin A is obtained by catalytic sulfurization reaction of olefin and sulfurizing agent at 120~200℃ and 1~10MPa; sulfurized olefin B is obtained by catalytic sulfurization reaction of olefin and sulfurizing agent at 150~250℃ and 0.08~0.12MPa. The anti-wear agent is an acidic phosphate amine salt; The sulfur-free phosphorus-type friction modifier is boric acid-modified oleic acid diethanolamide and / or borate amide.

[0007] Preferably, the sulfur content in the sulfurized olefin A is 42-46 wt%; and the sulfur content in the sulfurized olefin B is 40-45 wt%.

[0008] Preferably, the boric acid-modified oleic acid diethanolamide is obtained by reacting oleic acid and diethanolamine at a temperature of 140~160°C with boric acid in the presence of a solvent; more preferably, the solvent is petroleum ether with a boiling range of 90~120°C.

[0009] Preferably, the metal deactivator is a benzotriazole derivative and / or a thiadiazole derivative.

[0010] Preferably, the antioxidant is at least one of N-phenyl-α-naphthylamine, alkylated phenyl-α-naphthylamine, and alkyl diphenylamine; more preferably, the alkyl diphenylamine is bis(octyl)diphenylamine and / or octyl / pentyl diphenylamine.

[0011] Preferably, the rust inhibitor is a low-alkalinity petroleum sulfonate and / or stearamide.

[0012] Preferably, the solvent oil is at least one of alkylnaphthalene base oil, alkylbenzene base oil, synthetic ester base oil, and cycloalkyl base oil.

[0013] Preferably, the antifoaming agent is an organosilicon polymer and / or an organopolyether ester compound.

[0014] Preferably, the mixed base oil is a base oil containing synthetic esters and / or alkyl naphthalenes and a hydrogenated base oil and / or polyalphaolefin synthetic oil; more preferably, the content of the base oil containing synthetic esters and / or alkyl naphthalenes is 5 to 25 wt% of the total mass of the wind power gear oil composition.

[0015] Another aspect of the present invention provides a method for preparing the above-mentioned wind power gear oil composition, the method comprising: 1) After mixing extreme pressure agent, anti-wear agent, sulfur-free phosphorus friction modifier, metal deactivator, antioxidant, rust inhibitor and solvent oil, stir at 60~80℃ and 200~500rpm for 60~120min, cool and filter to obtain wind power gear oil composite additive. 2) After mixing the wind turbine gear oil composite additive, antifoaming agent and mixed base oil, stir at a speed of 100~400 rpm for 60~120 min.

[0016] Compared with the prior art, the present invention has the following advantages: 1) The wind power gear oil composition of the present invention has better anti-corrosion, anti-rust and anti-micro-pitting properties than existing wind power gear oils, while also having better high-temperature durability. Even after high-temperature thermal decay at 200°C, it still has good anti-wear properties, which can effectively improve the long-term service performance of wind power gear oil, thereby extending the oil change cycle and improving the economy of wind turbine generator sets.

[0017] 2) This invention uses extreme pressure agents, anti-wear agents and sulfur-free phosphorus friction modifiers as the core, and combines them with metal deactivators, antioxidants, rust inhibitors and solvent oil to prepare a composite additive for wind power gear oil. This composite additive for wind power gear oil can solve the problem of oxidation and degradation of oil under long-term service, improve the oil change cycle of wind power gear oil and thus reduce the overall cost of using wind power gear oil. Detailed Implementation

[0018] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0019] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0020] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0021] The wind power gear oil composition of this invention comprises, by weight percentage: 0.5-2 wt% extreme pressure agent, 0.1-1 wt% anti-wear agent, 0.1-0.5 wt% sulfur-free phosphorus friction modifier, 0.05-0.35 wt% metal deactivator, 0.15-1 wt% antioxidant, 0.02-0.2 wt% rust inhibitor, 0.5-2 wt% solvent oil, 0.005-0.05 wt% antifoaming agent; and 95-98 wt% mixed base oil. The extreme pressure agent is sulfurized olefin A and sulfurized olefin B, and the mass ratio of sulfurized olefin A to sulfurized olefin B is 1:1.5~4; sulfurized olefin A is obtained by catalytic sulfurization reaction of olefin and sulfurizing agent at 120~200℃ and 1~10MPa; sulfurized olefin B is obtained by catalytic sulfurization reaction of olefin and sulfurizing agent at 150~250℃ and 0.08~0.12MPa; the anti-wear agent is acidic phosphate ester amine salt; the sulfur-free phosphorus friction modifier is boric acid modified oleic acid diethanolamide and / or borate amide.

[0022] In the aforementioned wind power gear oil composition, the preferred contents of each component are: extreme pressure agent 0.7~1.2wt%, anti-wear agent 0.1~0.8wt%, sulfur-free phosphorus friction modifier 0.1~0.3wt%, metal deactivator 0.05~0.2wt%, antioxidant 0.2~0.6wt%, rust inhibitor 0.03~0.15wt%, solvent oil 0.5~1.0wt%, antifoaming agent 0.01~0.03wt%, and mixed base oil 96~98wt%.

[0023] The extreme pressure agent of this invention is a compounded sulfurized olefin, comprising sulfurized olefin A and sulfurized olefin B; wherein, sulfurized olefin A is a high-pressure sulfurized olefin, with a sulfur content preferably of 42-46 wt%; and sulfurized olefin B is an atmospheric-pressure sulfurized olefin, with a sulfur content preferably of 40-45 wt%. In some specific embodiments, sulfurized olefin A is sulfurized isobutylene T321H, and sulfurized olefin B is sulfurized isobutylene T321. The compounded extreme pressure agent can give the gear oil better extreme pressure carrying capacity and the ability to inhibit high-speed gear scuffing.

[0024] The acidic phosphate amine salts described in this invention include at least one of acidic alkyl phosphate amine salts, phosphate fatty amine salts, and phosphate aromatic amine salts.

[0025] The sulfur-free phosphorus-type friction modifier of this invention is boric acid-modified oleic acid diethanolamide and / or boric amide. The boric acid-modified oleic acid diethanolamide can be obtained by reacting oleic acid with diethanolamine at 140-160°C, followed by reaction with boric acid in the presence of a solvent; preferably, the solvent is petroleum ether with a boiling range of 90-120°C. In some specific embodiments, the preparation of boric acid-modified oleic acid diethanolamide can be as follows: oleic acid and diethanolamine undergo an amidation reaction at 40-160°C; after the reaction is complete, boric acid is added to the reaction product, and the reaction is carried out using petroleum ether with a boiling range of 90-120°C as the solvent; the mixture is refluxed at 100-160°C to remove water; after the reaction is complete, the solvent is removed by distillation, and the mixture is filtered to obtain boric acid-modified oleic acid diethanolamide; wherein the mass ratio of oleic acid, diethanolamine, and boric acid is 1:2.5-3.5:4-5. In this invention, the addition of boric acid-modified oleic acid diethanolamide can reduce the friction coefficient of the oil under low load conditions.

[0026] The metal deactivator described in this invention can be a benzotriazole derivative and / or a thiadiazole derivative. In some specific embodiments, the benzotriazole derivative is N,N-dialkylaminomethylenetriazole T551 and / or toluene-benzotriazole derivative Irgamet39; the thiadiazole derivative is dimercaptothiadiazole derivative T561.

[0027] The antioxidant described in this invention can be at least one selected from N-phenyl-α-naphthylamine, alkylated phenyl-α-naphthylamine, and alkyl diphenylamine. Preferably, the alkyl diphenylamine is bis(octyl)diphenylamine and / or octyl / pentyl)diphenylamine. In some specific embodiments, the N-phenyl-α-naphthylamine can be N-phenyl-α-naphthylamine T531.

[0028] The rust inhibitor described in this invention can be a low-alkalinity petroleum sulfonate and / or stearamide. Preferably, the low-alkalinity petroleum sulfonate is calcium low-alkalinity petroleum sulfonate and / or barium low-alkalinity petroleum sulfonate.

[0029] The solvent oil described in this invention can be at least one of alkylnaphthalene base oil, alkylbenzene base oil, synthetic ester base oil, and naphthenic base oil. In some specific embodiments, the alkylnaphthalene base oil is Synestic AN5; the alkylbenzene base oil is Synnaph AB3; and the synthetic ester base oil is Priolube 3970.

[0030] The antifoaming agent described in this invention can be an organosilicon polymer and / or an organic polyether ester compound. In some specific embodiments, the organosilicon polymer is T901 antifoaming agent; the organic polyether ester compound is 933S antifoaming agent.

[0031] The blended base oil described in this invention is a base oil containing synthetic esters and / or alkyl naphthalenes, and a hydrogenated base oil and / or a polyalphaolefin synthetic oil. Specifically, the blended base oil is obtained by mixing at least one of a base oil containing synthetic esters and a base oil containing alkyl naphthalenes with at least one of a hydrogenated base oil and a polyalphaolefin synthetic oil. The kinematic viscosity of the blended base oil at 40°C is preferably 100~460 mmHg. 2 / s. In this invention, the content of the base oil containing synthetic esters and / or alkyl naphthalenes is preferably 5 to 25 wt% of the total mass of the wind power gear oil composition.

[0032] In some specific implementations, the mixed base oil is obtained by blending a base oil containing synthetic esters and a polyalphaolefin synthetic oil, wherein the content of the base oil containing synthetic esters is 5 to 25 wt% of the total mass of the wind power gear oil composition.

[0033] In this invention, the polyalphaolefin synthetic oil can be at least one of PAO4, PAO6, PAO8, PAO10, PAO40, PAO100 and PAO150.

[0034] The preparation method of the above-mentioned wind power gear oil composition in this invention includes: 1) After mixing extreme pressure agent, anti-wear agent, sulfur-free phosphorus friction modifier, metal deactivator, antioxidant, rust inhibitor and solvent oil, stir at 60~80℃ and 200~500rpm for 60~120min, cool and filter to obtain wind power gear oil composite additive. 2) After mixing the wind turbine gear oil composite additive, antifoaming agent and mixed base oil, stir at a speed of 100~400 rpm for 60~120 min.

[0035] This invention prepares a composite additive for wind power gear oil using extreme pressure agents, anti-wear agents, sulfur-free phosphorus friction modifiers, metal deactivators, antioxidants, rust inhibitors, and solvent oil. The core of this additive is boric acid-modified oleic acid diethanolamide-sulfur phosphorus anti-wear agent, which improves the high-temperature durability and anti-wear performance of the wind power gear oil composition.

[0036] The following examples further illustrate the wind power gear oil composition and its preparation method according to the present invention. These examples are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following examples.

[0037] Unless otherwise specified, the experimental methods used in the following embodiments are conventional methods in the art. Unless otherwise specified, the experimental materials used in the following embodiments are commercially available.

[0038] In the following implementations: T321H, sulfurized isobutylene extreme pressure agent (sulfurized olefin A), purchased from Jinzhou Chenghua New Materials Co., Ltd.

[0039] T321, sulfurized isobutylene extreme pressure agent (sulfurized olefin B), purchased from Jinzhou Chenghua New Materials Co., Ltd.

[0040] T308, an acidic phosphate ester amine salt anti-wear agent, was purchased from Beijing Tianyi Chengchang New Material Technology Co., Ltd.

[0041] T551, a benzotriazole derivative metal deactivator, was purchased from Luoyang Pacific United Petrochemical Co., Ltd.

[0042] T531, N-phenyl-α-naphthylamine antioxidant, purchased from Dongguan Hongli Chemical Technology Co., Ltd.

[0043] L57, octyl / pentyl diphenylamine antioxidant, purchased from Dongguan Hongli Chemical Technology Co., Ltd.

[0044] T101, low-alkalinity calcium petroleum sulfonate rust inhibitor, purchased from Jinzhou Chenghua New Materials Co., Ltd.

[0045] T901, an organosilicon polymer antifoaming agent, was purchased from Beijing Tianyi Chengchang New Material Technology Co., Ltd.

[0046] PAO6, with a kinematic viscosity of 6 cSt at 100℃, was purchased from Nanjing Xinhua Yuan Chemical Co., Ltd.

[0047] PAO40, with a kinematic viscosity of 40 cSt at 100℃, was purchased from Nanjing Xinhuayuan Chemical Co., Ltd.

[0048] PAO100, with a kinematic viscosity of approximately 100 cSt at 100°C, was purchased from Nanjing Xinhua Yuan Chemical Co., Ltd.

[0049] PAO150, with a kinematic viscosity of approximately 150 cSt at 100℃, was purchased from Nanjing Xinhua Yuan Chemical Co., Ltd.

[0050] Priolube 3970, synthetic grease (3970) base oil, kinematic viscosity at 100°C is approximately 4.0 cSt, purchased from Dongguan Hongli Chemical Technology Co., Ltd.

[0051] CTL10, hydrotreated base oil, purchased from Nanjing Xinhua Yuan Chemical Co., Ltd.

[0052] Synnaph AB3, alkylbenzene base oil, purchased from Shanghai Daopu Chemical Co., Ltd.

[0053] Synesstic AN5, an alkyl naphthalene base oil, was purchased from ExxonMobil Chemical Company, USA.

[0054] SG3011, boroamide (sulfur-free phosphorus friction modifier), purchased from Shanghai Shenggu Technology Co., Ltd.

[0055] The wind turbine gear oil compound, Afton HiTEC 307, was purchased from Afton.

[0056] Dibutyl phosphite T304 was purchased from Beijing Tianyi Chengchang New Material Technology Co., Ltd.

[0057] Thiophosphate amine salt T310A was purchased from Henan Runyang Chemical New Materials Co., Ltd.

[0058] FMET 2890 nitrogen-containing borate ester was purchased from Luoyang Pacific United Petrochemical Co., Ltd.

[0059] Example 1 1) 100g of oleic acid and 250g of diethanolamine were subjected to an amidation reaction at 140℃. After the reaction was completed, 400g of boric acid was added to the product and the reaction was carried out with petroleum ether with a boiling range of 90~120℃ as solvent. The water was separated by reflux at 120℃. After the reaction was completed, the organic solvent was removed by distillation and filtered to obtain boric acid modified oleic acid diethanolamide. 2) Mix 0.1wt% of boric acid modified oleic acid diethanolamide obtained in step 1), 0.21wt% of sulfurized isobutylene T321H, 0.76wt% of sulfurized isobutylene T321, 0.1wt% of acidic phosphate ester amine salt anti-wear agent T308, 0.06wt% of benzotriazole derivative metal deactivator T551, 0.11wt% of N-phenyl-α-naphthylamine antioxidant T531, 0.09wt% of octyl / pentyl diphenylamine antioxidant L57, 0.07wt% of low-alkalinity petroleum sulfonate calcium rust inhibitor T101 and 0.5wt% alkylbenzene base oil Synnaph AB3, stir at 200 rpm for 60 min at 60℃, cool and filter to obtain a wind turbine gear oil composite additive; 3) Mix 10% of the synthetic ester base oil Priolube 3970, 71% of PAO40 and the balance PAO100, and stir at 100 rpm for 60 min to obtain the mixed base oil.

[0060] 4) Mix the wind power gear oil composite additive prepared in step 2), the mixed base oil prepared in step 3), and 0.01wt% organosilicon polymer antifoaming agent T901, and stir at 100 rpm for 60 min to obtain the wind power gear oil composition.

[0061] Example 2 1) 100g of oleic acid and 300g of diethanolamine were subjected to an amidation reaction at 140℃. After the reaction was completed, 450g of boric acid was added to the product and the reaction was carried out with petroleum ether with a boiling range of 90~120℃ as solvent. The water was separated by reflux at 120℃. After the reaction was completed, the organic solvent was removed by distillation and filtered to obtain boric acid modified oleic acid diethanolamide. 2) Mix 0.5wt% of boric acid modified oleic acid diethanolamide obtained in step 2), 0.25wt% sulfurized isobutylene T321H, 0.7wt% sulfurized isobutylene T321, 0.12wt% acidic phosphate ester amine salt anti-wear agent T308, 0.12wt% benzotriazole derivative metal deactivator T551, 0.3wt% N-phenyl-α-naphthylamine antioxidant T531, 0.3wt% octyl / pentyl diphenylamine antioxidant L57, 0.1wt% low-alkalinity petroleum sulfonate calcium rust inhibitor T101 and 0.56wt% alkylbenzene base oil Synnaph AB3, stir at 200 rpm for 60 min at 60℃, cool and filter to obtain a wind turbine gear oil composite additive; 3) Mix 10wt% of synthetic ester base oil Priolube 3970, 18wt% of hydrogenated base oil CTL10 and the balance PAO150, and stir at 100 rpm for 60 min to obtain mixed base oil.

[0062] 4) Mix the wind power gear oil composite additive prepared in step 2), the mixed base oil prepared in step 3), and 0.01wt% organosilicon polymer antifoaming agent T901, and stir at 100 rpm for 60 min to obtain the wind power gear oil composition.

[0063] Example 3 1) 100g of oleic acid and 350g of diethanolamine were subjected to an amidation reaction at 140℃. After the reaction was completed, 500g of boric acid was added to the product and the reaction was carried out with petroleum ether with a boiling range of 90~120℃ as solvent. The water was separated by reflux at 120℃. After the reaction was completed, the organic solvent was removed by distillation and filtered to obtain boric acid modified oleic acid diethanolamide. 2) Mix 0.8wt% of boric acid modified oleic acid diethanolamide obtained in step 2), 0.3wt% sulfurized isobutylene T321H, 0.9wt% sulfurized isobutylene T321, 0.2wt% acidic phosphate ester amine salt anti-wear agent T308, 0.2wt% benzotriazole derivative metal deactivator T551, 0.3wt% N-phenyl-α-naphthylamine antioxidant T531, 0.3wt% octyl / pentyl diphenylamine antioxidant L57, 0.15wt% low-alkalinity petroleum sulfonate calcium rust inhibitor T101 and 1.0wt% alkylbenzene base oil Synnaph AB3, stir at 200 rpm for 60 min at 60℃, cool and filter to obtain a wind turbine gear oil composite additive; 3) Mix 20% of alkyl naphthalene base oil Synestic AN5, 65 wt% of PAO40 and the balance PAO100, and stir at 100 rpm for 60 min to obtain mixed base oil.

[0064] 4) Mix the wind power gear oil composite additive prepared in step 2), the mixed base oil prepared in step 3), and 0.01wt% organosilicon polymer antifoaming agent T901, and stir at 100 rpm for 60 min to obtain the wind power gear oil composition.

[0065] Example 4 The wind power gear oil composition was prepared according to the method of Example 1, except that the N-phenyl-α-naphthylamine antioxidant T531 was replaced with an equal mass content of octyl / pentyl diphenylamine antioxidant L57.

[0066] Comparative Example 1 The wind power gear oil composition was prepared according to the method of Example 1, except that the wind power gear oil composite additive was replaced with an equal mass content of wind power gear oil composite Afton HiTEC 307.

[0067] Comparative Example 2 The wind power gear oil composition was prepared according to the method of Example 1, except that 0.21 wt% isobutylene sulfide T321H and 0.76 wt% isobutylene sulfide T321 were replaced with an equal mass content of di-n-butyl phosphite T304.

[0068] Comparative Example 3 The wind power gear oil composition was prepared according to the method of Example 1, except that the acidic phosphate amine salt anti-wear agent T308 was replaced with an equal mass content of thiophosphate amine salt T310A.

[0069] Comparative Example 4 The wind power gear oil composition was prepared according to the method of Example 1, except that boric acid modified oleic acid diethanolamide was replaced with an equal mass content of FMET 2890 nitrogen-containing borate ester.

[0070] Comparative Example 5 The wind power gear oil composition was prepared according to the method of Example 1, except that 0.21 wt% sulfurized isobutylene T321H and 0.76 wt% sulfurized isobutylene T321 were replaced with an equal mass of acidic phosphate ester amine salt anti-wear agent T308.

[0071] Comparative Example 6 The wind power gear oil composition was prepared according to the method of Example 1, except that the acidic phosphate ester amine salt anti-wear agent T308 was replaced with an equal mass content of boric acid modified oleic acid diethanolamide.

[0072] Comparative Example 7 The wind power gear oil composition was prepared according to the method of Example 1, except that boric acid modified oleic acid diethanolamide was replaced with an equal mass content of acidic phosphate amine salt anti-wear agent T308.

[0073] Comparative Example 8 The wind power gear oil composition was prepared according to the method of Example 1, except that 0.21 wt% isobutylene sulfide T321H and 0.76 wt% isobutylene sulfide T321 were replaced with 0.76 wt% isobutylene sulfide T321H and 0.21 wt% isobutylene sulfide T321.

[0074] Comparative Example 9 The wind power gear oil composition was prepared according to the method of Example 1, except that 0.21 wt% isobutylene sulfide T321H and 0.76 wt% isobutylene sulfide T321 were replaced with 0.485 wt% isobutylene sulfide T321H and 0.485 wt% isobutylene sulfide T321, that is, the ratio of isobutylene sulfide T321H to isobutylene sulfide T321 was 1:1.

[0075] Comparative Example 10 The wind power gear oil composition was prepared according to the method of Example 1, except that boric acid modified oleic acid diethanolamide was replaced with an equal mass content of sulfur-free phosphorus-type friction modifier SG3011.

[0076] The wind power gear oil compositions prepared in Examples 1-4 and Comparative Examples 1-10 were subjected to performance testing, and the results of the performance testing are recorded in Table 1.

[0077] Table 1

[0078]

[0079] in, The detection method for copper sheet corrosion is GB / T 5096-2017.

[0080] The test method for wear scar diameter (WSD) is SH / T 0189.

[0081] The test method for maximum non-seize load is GB / T 3142.

[0082] The test method for sintering load is GB / T 3142.

[0083] The difference between the test method for the diameter of the wear scar on a variable speed heavy-duty four-ball ball and the test method for the diameter of the wear scar is that the wear resistance test is carried out under the following conditions: variable speed of 20-2800RPM, fixed load of 40kg, fixed temperature of 75℃, and fixed time of 70min.

[0084] The method for testing the resistance to micropitting corrosion is the method disclosed in patent application CN118050281A.

[0085] As can be seen from the results in Table 1, the wind power gear oil compositions prepared using Examples 1-4 of the present invention have good extreme pressure anti-wear, anti-corrosion and anti-rust, anti-micro-pitting and heat resistance properties, and have significantly better effects in long-term protection of gearboxes.

[0086] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A wind turbine gear oil composition characterized in that, The wind power gear oil composition comprises, by weight percentage, 0.5-2 wt% of extreme pressure agent, 0.1-1 wt% of anti-wear agent, 0.1-0.5 wt% of sulfur-free phosphorus type friction modifier, 0.05-0.35 wt% of metal deactivator, 0.15-1 wt% of antioxidant, 0.02-0.2 wt% of rust inhibitor, 0.5-2 wt% of solvent oil, 0.005-0.05 wt% of anti-foaming agent, and 95-98 wt% of mixed base oil; The extreme pressure agent is sulfidized olefin A and sulfidized olefin B, and the mass ratio of the sulfidized olefin A to the sulfidized olefin B is 1:1.5-4; the sulfidized olefin A is obtained by catalytic sulfidization of olefin and sulfidizing agent at 120-200 ℃ and 1-10 MPa; and the sulfidized olefin B is obtained by catalytic sulfidization of olefin and sulfidizing agent at 150-250 ℃ and 0.08-0.12 MPa; The anti-wear agent is acid phosphate amine salt; The sulfur-free phosphorus type friction modifier is boric acid modified oleic acid diethanol amide and / or boronized amide.

2. The wind power gear oil composition of claim 1, wherein, The sulfur content in the sulfidized olefin A is 42-46 wt%, and the sulfur content in the sulfidized olefin B is 40-45 wt%.

3. The wind power gear oil composition according to claim 1 or 2, characterized in that The boric acid modified oleic acid diethanol amide is obtained by amide reaction of oleic acid and diethanol amine at 140-160 ℃, and then reacted with boric acid in the presence of a solvent; Preferably, the solvent is petroleum ether with a boiling range of 90-120 ℃.

4. The wind turbine gear oil composition of any of claims 1-3, wherein, The metal deactivator is benzene triazole derivative and / or thiadiazole derivative.

5. The wind turbine gear oil composition of any of claims 1-4, wherein, The antioxidant is at least one of N-phenyl-α-naphthylamine, alkylated phenyl-α-naphthylamine and alkyl diphenylamine; Preferably, the alkyl diphenylamine is dioctyl diphenylamine and / or octyl / pentyl diphenylamine.

6. The wind turbine gear oil composition of any of claims 1-5, wherein, The rust inhibitor is low base number petroleum sulfonate and / or stearic acid amide.

7. The wind turbine gear oil composition of any of claims 1-6, wherein The solvent oil is at least one of alkyl naphthalene base oil, alkyl benzene base oil, synthetic ester base oil and naphthenic base oil.

8. The wind turbine gear oil composition of any of claims 1-7, wherein, The anti-foaming agent is silicone polymer and / or organic polyether ester compound.

9. The wind turbine gear oil composition of any of claims 1-8, wherein, The mixed base oil is base oil containing synthetic ester and / or alkyl naphthalene and hydrogenated base oil and / or poly-alpha olefin synthetic oil; Preferably, the content of the base oil containing synthetic ester and / or alkyl naphthalene is 5-25 wt% of the total mass of the wind power gear oil composition.

10. A process for preparing the wind turbine gear oil composition according to any one of claims 1 to 9, characterized in that, The preparation method comprises: 1) mixing the extreme pressure agent, the anti-wear agent, the sulfur-free phosphorus type friction modifier, the metal deactivator, the antioxidant, the rust inhibitor and the solvent oil, stirring at a speed of 200-500 rpm at 60-80 ℃ for 60-120 min, cooling and filtering to obtain a wind power gear oil composite additive; 2) mixing the wind power gear oil composite additive, the anti-foaming agent and the mixed base oil, and stirring at a speed of 100-400 rpm for 60-120 min.

Images