Wind turbine generator gear oil foam repairing agent as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of industrial gear repairing, and relates to a wind turbine generator gear oil foam repairing agent and a preparation method and application thereof. The gear oil comprises the following components in percentage by mass: 70-80% of gear oil, 3-5% of an amine antioxidant, 3-5% of a phenol antioxidant, 2-6% of an extreme pressure agent, 1-4% of an anti-wear agent, 1-4% of a demulsifier and 7-11% of an anti-foaming agent. According to the gear oil foam repairing agent, through functional complementation of all the components, the foam problem is solved in a targeted mode, the oxidation resistance, abrasion resistance, emulsification resistance and extreme pressure performance of gear oil can be integrally improved, and the service life of oil products and equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of industrial gear repair and relates to a wind turbine gear oil foam restorer, a preparation method and application thereof. BACKGROUND

[0002] The gear box of a wind turbine is a core transmission component of a wind power generation system, and its stable operation is crucial to the efficiency and service life of the unit. The gear box generally adopts a circulating lubrication system. During operation, the lubricating oil is inevitably subjected to severe stirring, oscillation and air entrainment, resulting in the formation of foam. The formation of foam not only increases the volume of the oil, causing false liquid level triggering low oil level alarm, leading to unplanned shutdown, but also causes more serious problems, such as lubrication failure, accelerated oil oxidation, and impact on power transmission efficiency, and induces pitting, scratches and even cavitation of gears and bearings, greatly increasing operation and maintenance costs and equipment safety hazards.

[0003] The root causes of the foam problem are complex and can be mainly summarized into two categories: lubricating oil itself and equipment operation factors. In terms of the lubricating oil itself, the base oil has a certain solubility to air, which is significantly affected by temperature and pressure changes; additives, especially surface-active substances such as detergents and dispersants, not only play a role in pollution control but also promote the generation of foam; in addition, the anti-foaming agent is ineffective during storage or is exhausted by high-precision filter cores during use, which can cause a sharp decrease in the anti-foaming performance of the oil. In terms of equipment, the main causes of foam include improper sealing of oil seals, improper design of oil return pipes leading to turbulent flow, excessively low oil temperature (especially in cold regions and frequent start-stop conditions) causing increased viscosity and air blockage during pumping, and water or impurity contamination.

[0004] Current technical measures to combat foam in the industry mainly include physical and mechanical methods and chemical additive methods. Physical methods include strictly controlling the cleanliness of lubricating oil, adjusting the oil temperature by heating or cooling devices to avoid entering the viscosity window prone to foaming, and maintaining the oil level in a reasonable range that is neither too high nor too low. The chemical method mainly relies on the addition of anti-foaming agents, which can break the foam by reducing the surface tension of the bubble film and destroying the mechanical balance of the film. Commonly used anti-foaming agents include silicon-containing, non-silicon (such as polyacrylate) and composite anti-foaming agents. However, the existing technology, especially the widely used silicon-containing anti-foaming agent, has the problem of being easily adsorbed, filtered and thus deactivated by the precision filtration system in the gear box. Moreover, the silicon-containing anti-foaming agent is adsorbed and precipitated due to its strong affinity to metal filters, resulting in excessive foam in the gear box and frequent failure shutdown. In addition, relying solely on physical methods is often limited by site conditions and cannot completely eliminate the foam problem. SUMMARY

[0005] The application provides a wind turbine gear oil foam repairing agent and a preparation method and application thereof, which not only solves the problem of gear oil foam, but also improves the antioxidant, anti-wear, anti-emulsification and extreme pressure performance of the gear oil as a whole, thereby prolonging the service life of the oil product and equipment.

[0006] To achieve the above-mentioned purpose, the application adopts the following technical solutions: In a first aspect, the application provides a wind turbine gear oil foam repairing agent, which comprises, by mass percentage, 70-80% of gear oil, 3-5% of amine antioxidant, 3-5% of phenolic antioxidant, 2-6% of extreme pressure agent, 1-4% of anti-wear agent, 1-4% of demulsifier and 7-11% of anti-foaming agent.

[0007] Preferably, the amine antioxidant is nonyl diphenylamine.

[0008] Preferably, the phenolic antioxidant is 2,6-di-tert-butyl-4-methylphenol, tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester or β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid n-octadecyl ester.

[0009] Preferably, the extreme pressure agent is sulfurized isobutylene or amine salt of thiophosphoric acid.

[0010] Preferably, the anti-wear agent is di-n-butyl phosphite.

[0011] Preferably, the demulsifier is polyoxyethylene polyoxypropylene stearyl alcohol ether or polyoxyethylene polyoxypropylene amine ether.

[0012] Preferably, the anti-foaming agent is polydimethylsiloxane or polyacrylate ether.

[0013] In a second aspect, the application provides a preparation method of the wind turbine gear oil foam repairing agent, which comprises the following steps: S1, heating the gear oil to a preset temperature while stirring; S2, adding the amine antioxidant and the phenolic antioxidant into the gear oil obtained in step S1 in sequence and stirring at the preset temperature; S3, adding the extreme pressure agent and the anti-wear agent into the mixture obtained in step S2 in sequence and stirring at the preset temperature; S4, adding the demulsifier into the mixture obtained in step S3 and stirring at the preset temperature; S5, adding the anti-foaming agent into the mixture obtained in step S4 and stirring at the preset temperature to obtain the gear oil foam repairing agent.

[0014] Preferably, the preset temperature is 50-60 DEG C.

[0015] In a third aspect, the application provides a wind turbine gearbox oil foam repair agent for use in the field of lubrication maintenance of a wind turbine gearbox.

[0016] Compared with the prior art, the application has the following beneficial effects: By using the same type of gear oil as a carrier, the compatibility of the repair agent with the in-use oil product is ensured, and the compatibility risk caused by differences in base oil is avoided; by compounding amine antioxidants and phenolic antioxidants, synergistic antioxidant protection is provided, which can effectively delay the oxidative degradation of gear oil under high temperature conditions and prolong the service life of the oil product. By combining extreme pressure agents and anti-wear agents, a high-strength protective film can be formed on the surface of the gear, significantly enhancing the extreme pressure and wear resistance of the gear under heavy and impact loads, and protecting the equipment from wear. The demulsifier can quickly separate the water in the oil, prevent emulsification, and maintain the cleanliness and lubrication stability of the oil product. The antifoam agent can effectively inhibit the generation of foam and accelerate the elimination of foam, ensuring the integrity of the oil film and preventing lubrication failure and heat dissipation problems caused by foam. The foam repair agent of the application not only solves the problem of gear oil foam, but also improves the oxidation resistance, wear resistance, emulsion resistance and extreme pressure performance of the gear oil as a whole, prolonging the service life of the oil product and the equipment. DETAILED DESCRIPTION

[0017] In order for those skilled in the art to understand the characteristics and effects of the present application, the following is a general description and definition of the terms and phrases mentioned in the specification and claims. Unless otherwise specified, all technical and scientific words used herein have their usual meanings as understood by those skilled in the art of the present application, and in the event of a conflict, the definitions in the specification shall prevail.

[0018] Theories or mechanisms described and disclosed herein, whether correct or not, should not be considered limiting on the scope of the present application, i.e., the present application can be practiced without regard to any particular theory or mechanism.

[0019] In this document, all features defined by numerical ranges or percentage ranges, such as numerical values, quantities, contents and concentrations, are for the sake of brevity and convenience. Therefore, the description of numerical ranges or percentage ranges should be considered to have encompassed and specifically disclosed all possible sub-ranges and individual numerical values within the range (including integers and fractions).

[0020] In this document, unless otherwise specified, "comprise", "include", "contain", "have" or similar terms encompass the meaning of "consist of" and "consist essentially of", for example, "A comprises a" encompasses the meaning of "A comprises a and other" and "A comprises only a".

[0021] Herein, all possible combinations of the technical features in each embodiment or example are not described in order to make the description concise. Therefore, as long as there is no contradiction in the combination of the technical features, the technical features in each embodiment or example can be combined arbitrarily, and all possible combinations should be considered as the scope of the present specification.

[0022] The first object of the present application is to provide a wind turbine gear oil foam repair agent, comprising by mass percentage: gear oil 70-80%, amine antioxidant 3-5%, phenolic antioxidant 3-5%, extreme pressure agent 2-6%, anti-wear agent 1-4%, demulsifier 1-4%, anti-foaming agent 7-11%.

[0023] The wind turbine gear oil foam repair agent formula provided by the present application has synergistic effect of each component, which improves the comprehensive performance of the oil product. Among them, the gear oil as the basic carrier ensures the good compatibility of the repair agent with the in-use oil product, avoiding the performance decline caused by the mismatch of the oil product. The amine antioxidant and the phenolic antioxidant effectively delay the oxidative degradation of the gear oil under high temperature and oxygen through the composite antioxidant mechanism, protecting the basic performance of the oil product. The extreme pressure agent and the anti-wear agent significantly enhance the anti-wear and extreme pressure resistance of the gear under heavy load and impact load by forming a high-strength protective film on the metal surface, protecting the equipment. The demulsifier can quickly separate the water in the oil, prevent emulsification, and maintain the lubricating performance and stability of the oil product. The anti-foaming agent can effectively inhibit the generation of foam and accelerate the elimination of foam, ensuring the integrity of the oil film and avoiding the lubrication failure and heat dissipation problems caused by foam. The composite formula through the functional complementation of each component not only solves the foam problem specifically, but also improves the antioxidant, anti-wear, anti-emulsification and extreme pressure performance of the gear oil as a whole, prolonging the service life of the oil product and the equipment.

[0024] In practical applications, the gear oil in the formula of the present application can be selected from new oil or running oil of the same brand as the oil used in the fan gearbox. Synthetic gear oil prepared by using PAO (poly-alpha-olefin) base oil is commonly used in fan gearboxes. However, the solubility and sensitivity of PAO base oil to additives are relatively poor. If the repair agent package is directly prepared by using pure PAO base oil without blending, the additives are difficult to be fully and stably dispersed. More importantly, directly preparing the repair package by using pure PAO base oil has the risk of incompatibility between the base oil component and the oil used in the fan gearbox. Different types of PAO or base oils prepared by different processes may have slight differences in molecular structure and refining degree, which may cause the oil product to flocculate, precipitate or degrade in performance after mixing. Once the compatibility problem occurs, it will seriously damage the lubricating performance and stability of the repaired gear oil, and directly threaten the operation safety and reliability of the wind turbine generator.

[0025] Exemplarily, the amine antioxidant is nonyl diphenylamine, which has excellent high-temperature oxidation resistance and thermal stability, can effectively inhibit the oxidative degradation of gear oil under high-temperature and high-speed operating conditions of the fan gearbox, and prolong the service life of the oil product. It has good oil solubility and flowability, ensuring uniform dispersibility and compatibility in the repair agent formula and avoiding precipitation. At the same time, nonyl diphenylamine has good compatibility and synergistic effect with the phenolic antioxidant and other components in the formula, which can further improve the overall antioxidant performance of the repair agent.

[0026] Exemplarily, the phenolic antioxidant is 2,6-di-tert-butyl-4-methylphenol, tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester or β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid n-octadecanol ester. These phenolic antioxidants are all high-efficiency hindered phenolic compounds, which can effectively interrupt the free radical chain reaction in the oxidation process of lubricating oil by providing hydrogen atoms, thereby significantly delaying the oxidative degradation and viscosity increase of gear oil under high-temperature and high-load operating conditions of the fan gearbox, and prolonging the service life of the oil product. They have excellent thermal stability and can maintain antioxidant activity at relatively high temperatures, and are particularly suitable for the working conditions of the gearbox. In addition, this type of antioxidant has good oil solubility and good compatibility with gear oil and other additives in the formula, and is not easy to precipitate, ensuring that its performance is stable and does not produce sediment.

[0027] Exemplarily, the extreme pressure agent is sulfurized isobutylene or amine salt of thiophosphoric acid (such as ammonium thiophosphate, diphenylamine thiophosphate, etc.), and the sulfurized isobutylene can chemically react with the metal surface under extreme conditions of high temperature and high pressure to generate a firm iron sulfide protective film. The film has excellent heat resistance and can effectively prevent gear surface scratches and welding, significantly improving the extreme pressure performance and load capacity of the lubricating oil. The amine salt of thiophosphoric acid is a sulfur-phosphorus-nitrogen (S-P-N) type multi-effect additive, and the sulfur and phosphorus elements in the molecule jointly act to form an effective extreme pressure and wear-resistant protective film on the metal surface, and the introduction of nitrogen element also has certain antioxidant and rust-proof performance, which helps to comprehensively improve the comprehensive performance of the oil product.

[0028] Exemplarily, the anti-wear agent is di-n-butyl phosphite, which is a phosphorus-based extreme pressure and anti-wear agent. It can reduce wear and improve anti-wear performance through so-called "chemical polishing" effect. The protruding points on the friction surface decompose at high temperature, react with iron to form a low-melting-point eutectic alloy and flow to the concave part, making the friction surface smoother.

[0029] Exemplarily, the demulsifying agent is polyoxyethylene polyoxypropylene stearyl ether or polyoxyethylene polyoxypropylene amine ether. The polyoxyethylene polyoxypropylene stearyl ether (SP type) is a non-ionic surfactant, and the polyoxyethylene (EO) segment in its molecular structure provides hydrophilicity, and the polyoxypropylene (PO) segment and the stearyl group provide lipophilicity, so that it can effectively destroy the water-in-oil (W / O) emulsion, promote the rapid separation of oil and water, and thus achieve high-efficiency demulsification. The polyoxyethylene polyoxypropylene amine ether also belongs to a non-ionic surfactant, and the amine group in its molecule introduces a polar group and a potential weak base, enhancing its adsorption capacity on the interface and the destruction effect on certain emulsified substances. Its low surface tension and good permeability enable it to quickly reach and destroy the stable emulsion interface film, promote the coalescence and sedimentation of fine water droplets, and achieve oil-water separation.

[0030] Exemplarily, the anti-foaming agent is polydimethylsiloxane or polyacrylate ether. Polydimethylsiloxane has extremely low surface tension, can quickly penetrate and spread on the foam liquid film, effectively reduce the local surface tension, destroy the stability of the foam, and thus achieve rapid and efficient defoaming and antifoaming. It has high chemical inertness, excellent thermal stability and oxidation resistance, and can maintain stable performance in a wide temperature range (-50°C to 180°C or even higher), and is suitable for high temperature conditions that the fan gearbox may experience. Polyacrylate ether (belonging to non-silicon anti-foaming agent) has good solubility and dispersion stability in oil, which can effectively avoid the compatibility problems or performance degradation caused by sedimentation that may be encountered by organic silicon anti-foaming agents. Its mechanism focuses on replacing part of the surface active substances in the bubble film, changing the intermolecular force, thereby reducing the strength and elasticity of the foam film and accelerating the rupture of the foam.

[0031] The second object of the present application is to provide a preparation method of a wind turbine gear oil foam restorer, comprising the following steps: S1, heating the gear oil to 50-60℃ while stirring at 100-300rpm; S2, adding amine antioxidant and phenolic antioxidant into the gear oil of step S1 in sequence, and stirring at 100-300rpm for 20min or more at 50-60℃; S3, adding extreme pressure agent and anti-wear agent into the mixture of step S2 in sequence, and stirring at 100-300rpm for 30min or more at 50-60℃; S4, adding demulsifier into the mixture of step S3, and stirring at 100-300rpm for 30min or more at 50-60℃; S5, adding anti-foaming agent into the mixture of step S4, and stirring at 500-600rpm for 40min or more at 50-60℃ to obtain the gear oil foam restorer.

[0032] The method of the present application ensures that each additive component can be fully and stably dissolved and dispersed in the base oil by precisely controlling the addition sequence, temperature range and stirring conditions, thereby achieving the best synergistic repair effect. The step-by-step addition and gradient stirring process design effectively avoids the compatibility problems, precipitation or performance offsetting that may be caused by improper addition sequence or uneven dispersion of the additives, and is particularly beneficial to the stability of sensitive components such as anti-foaming agents. The range of 50-60℃ ensures the dissolution efficiency of the additives, and prevents the oxidation or degradation of the base oil and additives at excessively high temperatures. Finally, high-speed stirring significantly improves the dispersion fineness and uniformity of the anti-foaming agent in the system, so that it can quickly and durably exert excellent anti-foaming performance in the actual working conditions of the wind turbine gearbox.

[0033] The third object of the present application is to provide an application of the wind turbine gear oil foam restorer in the lubrication and maintenance field of wind turbine gearboxes. Specifically, the foam restorer is added to the in-use gear oil of the wind turbine gearbox at a specific addition amount based on the rated power of the wind turbine, for online repair of the foam properties of the in-use gear oil and simultaneous improvement of its extreme pressure and anti-wear performance.

[0034] wherein the calculation formula of the specific addition amount is:

[0035] wherein, is the mass (kg) of the restorer to be added, is the rated power (kW) of the wind turbine.

[0036] The application will be further described in connection with the following detailed description of specific embodiments. It should be understood that these embodiments are intended to illustrate the application and are not intended to limit the scope of the application. Furthermore, it should be understood that various modifications and changes can be made to the application by those skilled in the art upon reading the contents of this specification and such equivalent forms are considered to fall within the scope of the application as defined by the appended claims.

[0037] The following examples use apparatuses and devices that are conventional in the art. The experimental methods in the following examples, unless otherwise specified, are generally carried out under conventional conditions, or under conditions recommended by the manufacturers. The following examples use various raw materials, unless otherwise specified, all use conventional commercially available products, and the specifications are conventional specifications in the art. In the specification of the present application and in the following examples, unless otherwise specified, "%" means weight percent, "parts" means weight parts, and the ratio means weight ratio.

[0038] Example 1 The raw materials are weighed according to the mass ratio: 78 parts of gear oil, 3.5 parts of amine antioxidant, 3 parts of phenolic antioxidant, 2 parts of extreme pressure agent, 2 parts of anti-wear agent, 2.5 parts of demulsifier, and 9 parts of anti-foaming agent.

[0039] The preparation method of the gear oil foam restorer is as follows: S1, heat the gear oil to 60°C while stirring at 300 rpm; S2, add the amine antioxidant and the phenolic antioxidant into the gear oil of step S1 in sequence, and stir at 60°C and 300 rpm for 20 min; S3, add the extreme pressure agent and the anti-wear agent into the mixture obtained in step S2 in sequence, and stir at 60°C and 300 rpm for 30 min; S4, add the demulsifier into the mixture obtained in step S3, and stir at 60°C and 300 rpm for 30 min; S5, add the anti-foaming agent into the mixture obtained in step S4, and stir at 60°C and 600 rpm for 40 min to obtain the gear oil foam restorer.

[0040] Example 2 The raw materials are weighed according to the mass ratio: 70 parts of gear oil, 5 parts of amine antioxidant, 5 parts of phenolic antioxidant, 6 parts of extreme pressure agent, 4 parts of anti-wear agent, 3 parts of demulsifier, and 7 parts of anti-foaming agent.

[0041] The preparation method of the gear oil foam restorer is as follows: S1, heat the gear oil to 50°C while stirring at 300 rpm; S2, add the amine antioxidant and the phenolic antioxidant into the gear oil of step S1 in sequence, and stir at 50°C and 300 rpm for 20 min; S3, adding extreme pressure agent and anti-wear agent to the mixture obtained in step S2 in sequence, and stirring at 300 rpm for 30 min at 50°C; S4, adding demulsifier to the mixture obtained in step S3, and stirring at 300 rpm for 30 min at 50°C; S5, adding anti-foaming agent to the mixture obtained in step S4, and stirring at 600 rpm for 40 min at 50°C to obtain the gear oil foam restorer.

[0042] Example 3 The raw materials are weighed according to the mass fraction ratio: gear oil 72 parts, amine antioxidant 5 parts, phenolic antioxidant 3 parts, extreme pressure agent 5 parts, anti-wear agent 3 parts, demulsifier 2 parts, and anti-foaming agent 10 parts.

[0043] The preparation method of the gear oil foam restorer is as follows: S1, heating the gear oil to 52°C while stirring at 300 rpm; S2, adding amine antioxidant and phenolic antioxidant to the gear oil of step S1 in sequence, and stirring at 300 rpm for 20 min at 52°C; S3, adding extreme pressure agent and anti-wear agent to the mixture obtained in step S2 in sequence, and stirring at 300 rpm for 30 min at 52°C; S4, adding demulsifier to the mixture obtained in step S3, and stirring at 300 rpm for 30 min at 52°C; S5, adding anti-foaming agent to the mixture obtained in step S4, and stirring at 600 rpm for 40 min at 52°C to obtain the gear oil foam restorer.

[0044] Example 4 The raw materials are weighed according to the mass fraction ratio: gear oil 75 parts, amine antioxidant 4 parts, phenolic antioxidant 3 parts, extreme pressure agent 2 parts, anti-wear agent 1 part, demulsifier 4 parts, and anti-foaming agent 11 parts.

[0045] The preparation method of the gear oil foam restorer is as follows: S1, heating the gear oil to 54°C while stirring at 200 rpm; S2, adding amine antioxidant and phenolic antioxidant to the gear oil of step S1 in sequence, and stirring at 200 rpm for 25 min at 54°C; S3, adding extreme pressure agent and anti-wear agent to the mixture obtained in step S2 in sequence, and stirring at 200 rpm for 35 min at 54°C; S4, adding demulsifier to the mixture obtained in step S3, and stirring at 200 rpm for 35 min at 54°C; S5, adding anti-foaming agent to the mixture obtained in step S4, and stirring at 54°C at a rotating speed of 550 rpm for 45 min to obtain the gear oil foam repairing agent.

[0046] Example 5 The raw materials are weighed according to the mass fraction ratio: gear oil 76 parts, amine antioxidant 3 parts, phenolic antioxidant 4 parts, extreme pressure agent 4 parts, anti-wear agent 3 parts, demulsifier 3 parts, and anti-foaming agent 7 parts.

[0047] The preparation method of the gear oil foam repairing agent is as follows: S1, heating the gear oil to 58°C while stirring at 100 rpm; S2, adding amine antioxidant and phenolic antioxidant to the gear oil in step S1 in sequence, and stirring at 58°C at a rotating speed of 100 rpm for 25 min; S3, adding extreme pressure agent and anti-wear agent to the mixture obtained in step S2 in sequence, and stirring at 58°C at a rotating speed of 100 rpm for 35 min; S4, adding demulsifier to the mixture obtained in step S3, and stirring at 58°C at a rotating speed of 100 rpm for 35 min; S5, adding anti-foaming agent to the mixture obtained in step S4, and stirring at 58°C at a rotating speed of 500 rpm for 45 min to obtain the gear oil foam repairing agent.

[0048] Example 6 The raw materials are weighed according to the mass fraction ratio: gear oil 80 parts, amine antioxidant 3 parts, phenolic antioxidant 3 parts, extreme pressure agent 2 parts, anti-wear agent 1 part, demulsifier 1 part, and anti-foaming agent 10 parts.

[0049] The preparation method of the gear oil foam repairing agent is as follows: S1, heating the gear oil to 60°C while stirring at 100 rpm; S2, adding amine antioxidant and phenolic antioxidant to the gear oil in step S1 in sequence, and stirring at 60°C at a rotating speed of 100 rpm for 25 min; S3, adding extreme pressure agent and anti-wear agent to the mixture obtained in step S2 in sequence, and stirring at 60°C at a rotating speed of 100 rpm for 35 min; S4, adding demulsifier to the mixture obtained in step S3, and stirring at 60°C at a rotating speed of 100 rpm for 35 min; S5, adding anti-foaming agent to the mixture obtained in step S4, and stirring at 60°C at a rotating speed of 500 rpm for 45 min to obtain the gear oil foam repairing agent.

[0050] Performance test: The gear oil foam restorer obtained in Example 1 was added into the fan gearbox oil, and the equipment was operated for 1 week after the addition of the restorer, and the test results are shown in Table 1: Table 1 Performance test data of the gear oil after the addition of the restorer

[0051] As shown in Table 1, the gear oil foam restorer successfully solved the problem of the foam of the fan gearbox oil, and the effect was rapid and durable. Meanwhile, it had no negative effect on other key performance indicators of the gear oil, and the comprehensive performance of the oil was improved by the addition of a supplementary functional additive (anti-wear and antioxidant). The restorer can effectively restore the performance of the in-use oil, prolong the oil change cycle, ensure the safe and stable operation of the equipment, and has high practical value.

[0052] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wind turbine gear oil foam restorer, characterized in that, By mass percentage, it comprises: gear oil 70%-80%, amine antioxidant 3%-5%, phenolic antioxidant 3%-5%, extreme pressure agent 2%-6%, anti-wear agent 1%-4%, demulsifier 1%-4%, and anti-foaming agent 7%-11%.

2. A wind turbine gear oil foam restorer according to claim 1, characterized in that The amine antioxidant is nonyl diphenylamine.

3. A wind turbine gear oil foam restorer according to claim 1, characterized in that The phenolic antioxidant is 2,6-di-tert-butyl-4-methylphenol, tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, or β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid n-octadecanol ester.

4. A wind turbine gear oil foam restorer according to claim 1, wherein, The extreme pressure agent is sulfurized isobutylene or amine salt of thiophosphoric acid.

5. A wind turbine gear oil foam restorer according to claim 1, wherein, The anti-wear agent is di-n-butyl phosphite.

6. A wind turbine gear oil foam restorer according to claim 1, wherein, The demulsifier is polyoxyethylene polyoxypropylene octadecanol ether or polyoxyethylene polyoxypropylene amine ether.

7. A wind turbine gear oil foam restorer according to claim 1 wherein, The anti-foaming agent is polydimethylsiloxane or polyacrylate ether.

8. The method of claim 1-7, wherein the wind turbine gear oil foam restorer is prepared by the steps of: The method comprises the following steps: S1, heating the gear oil to a preset temperature while stirring; S2, adding the amine antioxidant and the phenolic antioxidant into the gear oil of step S1 in sequence, and stirring at the preset temperature; S3, adding the extreme pressure agent and the anti-wear agent into the mixture obtained in step S2 in sequence, and stirring at the preset temperature; S4, adding the demulsifier into the mixture obtained in step S3, and stirring at the preset temperature; S5, adding the anti-foaming agent into the mixture obtained in step S4, and stirring at the preset temperature to obtain the gear oil foam repairing agent.

9. The method of claim 8, wherein the wind turbine gear oil foam restorer is prepared by the steps of: The preset temperature is 50-60℃.

10. Application of the gear oil foam repairing agent of any one of claims 1-7 in the lubrication maintenance of wind turbine gearbox.

Images