A new wind power gear oil complexing agent and a preparation method thereof

Abstract

The application relates to the field of lubricating oil, and more particularly to a novel wind power gear oil compound and a preparation method thereof. The novel wind power gear oil compound comprises, in mass parts, at least the following raw materials: a base agent 60-80 parts, an oily agent 1-8 parts, an antioxidant 3-6 parts, an anti-wear agent 3-8 parts and an improver 4-10 parts. The application provides a novel wind power gear oil compound which can be directly used as a wind power gear lubricating oil or used as an additive of other lubricating oil systems, can effectively enhance the extreme pressure resistance, corrosion and rust resistance, low-temperature flow and stability of the lubricating oil under the guarantee of excellent lubricating wear resistance and weather resistance and aging resistance of the lubricating oil, and meets the performance requirements of more complex wind power speed-up gear boxes.

Description

Technical Field

[0001] This application relates to the field of lubricating oil, and more specifically mentions a novel wind turbine gear oil compound and its preparation method. Background Technology

[0002] With the increasing global demand for clean energy, wind power, as a clean and renewable energy source, has seen its development accelerate significantly. As a core component of wind turbine generators, the gearbox's stable operation is crucial to the efficiency and lifespan of the entire system. The wind turbine gearbox is a core component of doubly-fed induction generators (DFIGs), converting the power carried by the low-speed wind turbine into high-speed, low-torque power matched to the generator. Its performance throughout its life cycle directly affects the overall power generation of the turbine. Wind turbine generators are typically installed at altitudes of 80-100 meters in mountainous areas, deserts, grasslands, and near-shore locations, where the nacelle space is limited, resulting in extremely high repair costs after a failure.

[0003] Wind power gear oil is a key factor in ensuring the normal operation of the gearbox. It not only needs to provide sufficient lubrication protection under extreme operating conditions, but also needs to possess good anti-wear properties, oxidation stability, and low-temperature fluidity. Currently, widely used wind power gear oils are typically formulated based on mineral oils or synthetic base oils, with various additives added to enhance their performance. For example, some wind power gear oils use polyalphaolefin (PAO) and synthetic esters as base oils, combined with extreme pressure agents, friction reducers, antioxidants, rust inhibitors, and other functional additives to enhance their performance under high load and high temperature environments. Furthermore, some products pay special attention to reducing the coefficient of friction and improving energy transfer efficiency, such as by using specific chemical structures to optimize the formation of the lubricating oil film, thereby reducing direct metal-to-metal contact and achieving better anti-wear effects.

[0004] However, despite the continuous improvement in the performance of existing products on the market, there are still shortcomings when facing more demanding working conditions. For example, there are deficiencies in extreme pressure performance, corrosion and rust prevention performance, low temperature fluidity and stability. Summary of the Invention

[0005] Therefore, in summary, how to improve the defects of the aforementioned wind turbine gear oils and further enhance their overall performance to meet the higher requirements of current wind power generation has become an important research topic for those skilled in the art. The applicant has dedicated itself to in-depth research on this type of lubricant product and proposes a novel wind turbine gear oil compound in this application. This compound can be used directly as a wind turbine gear lubricant or as an additive to other lubricant systems. While ensuring the excellent lubrication, wear resistance, weather resistance, and aging resistance of the lubricant, it effectively enhances the extreme pressure properties, corrosion and rust prevention, low-temperature flow, and stability of the lubricant, meeting the more complex performance requirements of wind turbine gearboxes.

[0006] A novel wind turbine gear oil compound, by weight, comprises at least the following raw materials: 60-80 parts base agent, 1-8 parts oiliness agent, 3-6 parts antioxidant, 3-8 parts anti-wear agent, and 4-10 parts modifier.

[0007] In a preferred embodiment, the mass ratio of the base agent, the oiliness agent and the improver is (65~75):(2~6):(5~9).

[0008] In a preferred embodiment, the mass ratio of the base agent, oiling agent and improver is (67~70):(2~5):(7~8.5).

[0009] In a preferred embodiment, the base agent is isobutylene sulfide.

[0010] In a preferred embodiment, the oiling agent is at least one of sulfurized olefin cottonseed oil, sulfurized castor oil, oleic acid ethoxylate, and sulfurized palm oil.

[0011] In a preferred embodiment, the oiling agent is sulfurized olefin cottonseed oil or sulfurized castor oil.

[0012] In a preferred embodiment, the oiliness agent is sulfurized olefin cottonseed oil.

[0013] In a preferred embodiment, the antioxidant is at least one selected from butyl-octyl diphenylamine, 2,6-di-tert-butyl-p-cresol, pentaerythritol tetraester, and alkylated diphenylamine.

[0014] In a preferred embodiment, the antioxidant is a composition of butyloctyl diphenylamine and 2,6-di-tert-butyl-p-cresol.

[0015] In a preferred embodiment, the mass ratio of butyloctyl diphenylamine to 2,6-di-tert-butyl-p-cresol is (1~1.5):1.

[0016] In a preferred embodiment, the anti-wear agent is at least one selected from the following: acidic ammonium phosphate salt, thiophosphate ammonium salt, borate amine salt, and sulfide alkyl naphthalene.

[0017] In a preferred embodiment, the anti-wear agent is a composition of an acidic ammonium phosphate salt and an ammonium thiophosphate.

[0018] In a preferred embodiment, the acidic phosphate ammonium salt is isooctyl acid thiophospholipid octadecylamine.

[0019] In a preferred embodiment, the ammonium thiophosphate is a dialkyl thiophosphate complex salt.

[0020] In a preferred embodiment, the mass ratio of the acidic ammonium phosphate salt to the ammonium thiophosphate salt is (4~6):(4~6).

[0021] In a preferred embodiment, the modifier is a composition of magnesium lignosulfonate complex, benzotriazole borate ester, and sodium polyglycerol-3-oleyl ether carboxylate.

[0022] In a preferred embodiment, the mass ratio of the magnesium lignosulfonate complex, benzotriazole borate ester, and sodium polyglycerol-3-oleyl ether carboxylate is (3~6):(2~4):(0.8~1.5).

[0023] In a preferred embodiment, the mass ratio of the magnesium lignosulfonate complex, benzotriazole borate ester, and sodium polyglycerol-3-oleyl ether carboxylate is (4~5):(2.5~3.5):(1~1.2).

[0024] In a preferred embodiment, the novel wind turbine gear oil compound, by weight, further comprises: 1-3 parts dispersant, 1-2 parts detergent, 1-2 parts metal passivator, 2-3 parts rust inhibitor, and 3-8 parts combined functional agent.

[0025] In a preferred embodiment, the mass ratio of the base agent to the combined functional agent is (65~75):(4~6).

[0026] In a preferred embodiment, the mass ratio of the base agent to the combined functional agent is (67~70):(4.5~5.5).

[0027] In a preferred embodiment, the dispersant is at least one selected from polyisobutylene succinimide, polyisobutylene succinimide, polyalkyl acrylate, and boronized polyisobutylene succinimide.

[0028] In a preferred embodiment, the dispersant is polyisobutylene succinimide.

[0029] In a preferred embodiment, the detergent is at least one selected from calcium alkyl sulfonate, calcium alkylphenol sulfide, magnesium borosulfonate, and calcium naphthenate.

[0030] In a preferred embodiment, the detergent is calcium alkyl sulfonate.

[0031] In a preferred embodiment, the metal passivating agent is at least one selected from 2,5-dimercapto-1,3,4-thiadiazole, methylbenzotriazole, and alkyl aminophosphate.

[0032] In a preferred embodiment, the metal passivating agent is 2,5-dimercapto-1,3,4-thiadiazole.

[0033] In a preferred embodiment, the rust inhibitor is at least one selected from alkenyl succinic acid, sorbitol monooleate, nonylphenol ethoxylate phosphate, and dinonylnaphthalene sulfonate calcium.

[0034] In a preferred embodiment, the rust inhibitor is alkenyl succinic acid.

[0035] In a preferred embodiment, the combined functional agent is a composition of benzotriazole borate, an organomolybdenum complex, and 1-hexyl-3-methylimidazolium tetrafluoroborate.

[0036] In a preferred embodiment, the combined functional agent is benzotriazole borate, and the mass ratio of the organic molybdenum complex and 1-hexyl-3-methylimidazolium tetrafluoroborate is (3~4):(3~4):(0.3~0.6).

[0037] In a preferred embodiment, the combined functional agent is benzotriazole borate, and the mass ratio of the organic molybdenum complex and 1-hexyl-3-methylimidazolium tetrafluoroborate is (3~3.5):(3.5~4):(0.3~0.4).

[0038] A method for preparing the above-mentioned novel wind turbine gear oil compound includes the following steps: S1: Add the base agent to a mixing vessel and heat to 45~50℃, keep warm for 0.5~1h, then add the remaining raw materials sequentially, and disperse at high speed of 400~500rpm for 40~50min; S2: After completion, maintain the temperature at 60~70℃ and stir at 200~300rpm under normal pressure for 1.5~2h; S3: Then cool down to 35~40℃ and slowly defoam, then pass the test, filter, and keep away from light to obtain the final product.

[0039] This application has practical significance and beneficial effects:

[0040] 1. This application proposes a novel wind turbine gear oil compound, which can be used directly as a wind turbine gear lubricant or as an additive to other lubricant systems. It can effectively enhance the extreme pressure properties, corrosion and rust prevention, low-temperature flow and stability of the lubricant while ensuring its excellent lubrication, wear resistance, weather resistance and aging resistance, thus meeting the more complex performance requirements of wind turbine speed-increasing gearboxes.

[0041] 2. The wind turbine gear oil compound finally obtained in this application fills the performance gap of this type of lubricating oil product in China. It can effectively lubricate gears and bearings and remove frictional heat. It can also be used for oil sample analysis to promptly identify gearbox abnormalities, thereby providing a basis for formulating treatment measures and facilitating the maintenance of wind turbine units.

[0042] 3. Furthermore, this application balances the contradictions between multiple properties such as extreme pressure resistance, wear resistance, and weather aging resistance through the integration of the formulation and the combined effect of improvers and combined functional agents. This reduces the amount of functional additives used, avoids compatibility problems and negative mutual effects caused by excessive addition, and thus maintains excellent overall stability. Attached Figure Description

[0043] Figure 1 This is a physical image of the novel wind turbine gear oil composite agent prepared in Example 1 of this application.

[0044] Figure 2 This is a test report diagram of the novel wind power gear oil composite agent prepared in Example 1 of this application. Detailed Implementation

[0045] Example 1

[0046] The new type of wind turbine gear oil compound, by weight, contains the following raw materials: 68 parts base agent, 5 parts oiliness agent, 5 parts antioxidant, 7 parts anti-wear agent, 7.5 parts modifier, 2 parts dispersant, 1 part detergent, 1.2 parts metal passivator, 2 parts rust inhibitor, and 5.2 parts combined functional agent.

[0047] The base agent is sulfurized isobutylene; the oiliness agent is sulfurized olefin cottonseed oil.

[0048] The antioxidant is a combination of butyloctyl diphenylamine and 2,6-di-tert-butyl-p-cresol in a mass ratio of 1:1.

[0049] The anti-wear agent is a composition of acidic ammonium phosphate salt (isooctyl acidic thiophospholipid octadecylamine) and ammonium thiophosphate salt (dialkyl thiophosphate complex amine salt) in a mass ratio of 5:6.

[0050] The modifier is a composition of magnesium lignosulfonate complex, benzotriazole borate ester and sodium polyglycerol-3-oleyl ether carboxylate in a mass ratio of 4.5:3:1.

[0051] Magnesium lignosulfonate complex, industrial grade, from Wuhan Jiyesheng Chemical Co., Ltd.; Sodium polyglycerol-3-oleoethercarboxylate, Carbomer 45, from Evonik Industries AG, Germany.

[0052] The dispersant is polyisobutylene succinimide, industrial grade, from Maclean's reagents; the detergent is calcium alkyl sulfonate; the metal passivator is 2,5-dimercapto-1,3,4-thiadiazole; and the rust inhibitor is alkenyl succinic acid.

[0053] The combined functional agent is a composition of benzotriazole borate, an organomolybdenum complex, and 1-hexyl-3-methylimidazolium tetrafluoroborate in a mass ratio of 3.2:3.8:0.4.

[0054] Organic molybdenum complex, industrial grade, from Pacific United Petrochemical Co., Ltd., Luoyang, China.

[0055] The preparation method of the above-mentioned novel wind turbine gear oil compound includes the following steps: S1: Add the base agent to the mixing vessel and heat to 50°C. After keeping it at this temperature for 1 hour, add the remaining raw materials in sequence and disperse them at a high speed of 400 rpm for 45 minutes; S2: After completion, maintain the temperature at 70°C and stir at 250 rpm under normal pressure for 2 hours; S3: Then cool down to 40°C and slowly defoam. After inspection, filter and keep away from light to obtain the final product.

[0056] The actual product of the novel wind turbine gear oil compound prepared in this embodiment is shown below. Figure 1 As shown.

[0057] The test report for the novel wind turbine gear oil compound prepared in this embodiment is as follows: Figure 2 As shown.

[0058] Example 2

[0059] The only difference between this embodiment and Embodiment 1 is as follows: The new wind power gear oil compound, by weight, includes the following raw materials: 69 parts base agent, 2 parts oiliness agent, 5 parts antioxidant, 7 parts anti-wear agent, 6.5 parts modifier, 2 parts dispersant, 1 part detergent, 1.2 parts metal passivator, 2 parts rust inhibitor, and 4.5 parts combined functional agent.

[0060] The modifier is a composition of magnesium lignosulfonate complex, benzotriazole borate ester and sodium polyglycerol-3-oleyl ether carboxylate in a mass ratio of 5.5:2.5:0.8.

[0061] The combined functional agent is a composition of benzotriazole borate, an organic molybdenum complex, and 1-hexyl-3-methylimidazolium tetrafluoroborate in a mass ratio of 3:4:0.6.

[0062] All other implementation schemes are the same.

[0063] Example 3

[0064] The only difference between this embodiment and Embodiment 1 is as follows: The new wind power gear oil compound, by weight, includes the following raw materials: 74 parts base agent, 3.5 parts oiliness agent, 6 parts antioxidant, 6.5 parts anti-wear agent, 8.8 parts modifier, 2 parts dispersant, 1 part detergent, 1.2 parts metal passivator, 2 parts rust inhibitor, and 5 parts combined functional agent.

[0065] The modifier is a composition of magnesium lignosulfonate complex, benzotriazole borate ester and sodium polyglycerol-3-oleyl ether carboxylate in a mass ratio of 3.8:3.5:1.4.

[0066] The combined functional agent is a composition of benzotriazole borate, an organic molybdenum complex, and 1-hexyl-3-methylimidazolium tetrafluoroborate in a mass ratio of 4:3:0.3.

[0067] All other implementation schemes are the same.

[0068] Comparative Example 1

[0069] The only difference between this comparative example and Example 1 is as follows: The novel wind turbine gear oil compound, by weight, comprises the following raw materials: 80 parts base agent, 5 parts oiliness agent, 6.5 parts antioxidant, 8 parts anti-wear agent, 1.5 parts modifier, 2 parts dispersant, 1 part detergent, 1.2 parts metal passivator, 2 parts rust inhibitor, and 7.5 parts combined functional agent.

[0070] All other implementation schemes are the same.

[0071] Comparative Example 2

[0072] The only difference between this comparative example and Example 1 is as follows: The novel wind turbine gear oil compound, by weight, comprises the following raw materials: 75 parts base agent, 4 parts oiliness agent, 6 parts antioxidant, 8 parts anti-wear agent, 10.5 parts modifier, 2 parts dispersant, 1 part detergent, 1.2 parts metal passivator, 2 parts rust inhibitor, and 1.5 parts combined functional agent.

[0073] All other implementation schemes are the same.

[0074] Comparative Example 3

[0075] The only difference between this comparative example and Example 1 is that the modifier is a combination of magnesium lignosulfonate complex, benzotriazole borate ester and sodium polyglycerol-3-oleyl ether carboxylate in a mass ratio of 1:4:0.5.

[0076] All other implementation schemes are the same.

[0077] Comparative Example 4

[0078] The only difference between this comparative example and Example 1 is that the modifier is a combination of magnesium lignosulfonate complex, benzotriazole borate ester and sodium polyglycerol-3-oleyl ether carboxylate in a mass ratio of 8:1:3.

[0079] All other implementation schemes are the same.

[0080] Comparative Example 5

[0081] The only difference between this comparative example and Example 1 is that the combined functional agent is a composition of benzotriazole borate, an organomolybdenum complex, and 1-hexyl-3-methylimidazolium tetrafluoroborate in a mass ratio of 5:2:1.

[0082] All other implementation schemes are the same.

[0083] Comparative Example 6

[0084] The only difference between this comparative example and Example 1 is that the combined functional agent is a composition of benzotriazole borate, an organomolybdenum complex and 1-hexyl-3-methylimidazolium tetrafluoroborate in a mass ratio of 2:5:0.2.

[0085] All other implementation schemes are the same.

[0086] Performance testing

[0087] The wind turbine gear oil was formulated using examples, comparative examples, and commercially available formulation agents. The specific formulation scheme is shown in Table 1. H307 is from Laubercom GmbH, Germany; IG93MB is from Lubrizol, USA; POA6 is from Sinopec Maoming Petrochemical Company, China; PAO150 is from Sinopec Maoming Petrochemical Company, China; and Priolube 3970 is from Croda, UK.

[0088] Table 1 Wind Turbine Gear Oil Formulation Table

[0089]

[0090] 1. Extreme pressure test: Refer to standard GB / T 3142, and the test results of the four-ball machine are recorded in Table 2.

[0091] 2. Abrasion resistance test: Refer to standard NB / SH / T 0189, and the test results of the four-ball machine are recorded in Table 2.

[0092] 3. Antioxidant test, refer to standard SH / T 0193, and the results are recorded in Table 2.

[0093] 4. FZG test: Refer to standard GB / T 33540.3-2017, and the results are recorded in Table 2.

[0094] Table 1 Performance Test Results

[0095]

[0096] Based on the final performance test results of the examples and comparative examples, it can be seen that Comparative Examples 1 and 2 did not adopt the technical solutions such as the raw material ratios specified in this application as in Examples 1 and 3, which led to a weakening of their interaction and the synergistic effect between the raw materials. Consequently, the gear oil compound products prepared by Comparative Examples 1 and 2 showed a significant decline in final performance.

[0097] Comparative Examples 3-6, due to the use of different modifiers and combined functional agents, resulted in a significant decrease in their effectiveness within the gear oil compound system, leading to negative impacts and fluctuations in overall performance, making the final performance significantly worse than Examples 1-3.

Claims

1. A novel wind turbine gear oil compound, characterized in that: By weight, the raw materials include at least: 60-80 parts base agent, 1-8 parts oiliness agent, 3-6 parts antioxidant, 3-8 parts anti-wear agent, 4-10 parts modifier, 1-3 parts dispersant, 1-2 parts detergent, 1-2 parts metal passivator, 2-3 parts rust inhibitor, and 3-8 parts combined functional agent. The improver is a composition of magnesium lignosulfonate complex, benzotriazole borate ester and sodium polyglycerol-3-oleyl ether carboxylate, in a mass ratio of (3~6):(2~4):(0.8~1.5). The anti-wear agent is at least one of acidic phosphate ammonium salt, thiophosphate ammonium salt, borate amine salt, and sulfide alkyl naphthalene; The mass ratio of the base agent, oiliness agent and improver is (65~75):(2~6):(5~9); The mass ratio of the base agent to the combined functional agent is (65~75):(4~6); The combined functional agent is a composition of benzotriazole borate, an organomolybdenum complex, and 1-hexyl-3-methylimidazolium tetrafluoroborate, in a mass ratio of (3~4):(3~4):(0.3~0.6). The base agent is isobutylene sulfide.

2. The novel wind turbine gear oil compound according to claim 1, characterized in that: The oiliness agent is at least one of sulfurized olefin cottonseed oil, sulfurized castor oil, oleic acid ethoxylate, and sulfurized palm oil; the antioxidant is at least one of butylated diphenylamine, 2,6-di-tert-butyl-p-cresol, pentaerythritol tetraester, and alkylated diphenylamine.

3. The novel wind turbine gear oil compound according to claim 2, characterized in that: The antioxidant is a combination of butyloctyl diphenylamine and 2,6-di-tert-butyl-p-cresol in a mass ratio of (1~1.5):

1.

4. The novel wind turbine gear oil compound according to claim 3, characterized in that: The anti-wear agent is a composition of acidic ammonium phosphate salt and ammonium thiophosphate salt, with a mass ratio of (4~6):(4~6).

5. A method for preparing a novel wind turbine gear oil composite agent according to any one of claims 1 to 4, characterized in that: Specifically, the following steps are included: S1: Add the base agent to the mixing vessel and heat to 45~50℃. After holding at this temperature for 0.5~1h, add the remaining raw materials sequentially and disperse them at high speed of 400~500rpm for 40~50min. S2: After completion, maintain the temperature at 60~70℃ and stir at 200~300rpm under normal pressure for 1.5~2h. S3: Then cool down to 35~40℃ and slowly defoam. After inspection, filter and keep away from light to obtain the final product.

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