A wind turbine gear oil composition with biodegradability and its preparation method and application

Abstract

The application discloses a wind power gear oil composition with biodegradability and a preparation method and application thereof. The wind power gear oil composition comprises the following components in mass percentage: 80-90% of synthetic ester type base oil, 0.8-1.8% of composite anti-wear agent, 1-10% of anti-foaming agent and 1-10% of demulsifier. The synthetic ester type base oil is adopted, and the composite anti-wear agent, the anti-foaming agent and the demulsifier are added at the same time, so that the obtained gear oil product can not only meet the performance requirements of the wind power gear oil, but also has good biodegradability, and is beneficial to the protection of the ecological environment.

Description

Technical Field

[0001] This invention belongs to the field of gear oil additive technology. Specifically, this invention relates to a biodegradable wind power gear oil composition, its preparation method, and its application. Background Technology

[0002] With the development of green energy in recent years, the wind power industry has also experienced rapid growth. As the most widely used and fastest-growing new energy power generation technology, wind power has been developed and applied on a large scale globally. By the end of 2017, my country had over 90,000 wind turbines installed, with a capacity exceeding 160 million kilowatts, and this number is increasing by more than 10,000 units and 20 million kilowatts annually. Having experienced a decade of unprecedented rapid growth, my country's wind energy industry has already ranked among the world's leading countries in terms of installed capacity. Gear oil, as an important liquid lubricating medium, mainly plays a role in lubrication, friction reduction, and heat dissipation in the main gearbox of wind turbines.

[0003] Currently, the base oil in commonly used wind turbine gear oils is mainly composed of polyalphaolefin (PAO), which has poor biodegradability and a long residence time in the natural environment. Once it seeps into the soil and aquifers, it will cause serious harm to the environment. With the increasing awareness of environmental protection and the increasingly stringent corresponding environmental protection measures, the development of new biodegradable wind turbine gear oils has become an inevitable trend. Summary of the Invention

[0004] This invention aims to at least partially address one of the technical problems in related technologies. To this end, embodiments of this invention provide a biodegradable wind turbine gear oil composition, its preparation method, and its application.

[0005] In a first aspect, embodiments of the present invention provide a wind turbine gear oil composition comprising the following components in weight percentages:

[0006] Synthetic ester-based base oils 80%–90%,

[0007] Composite anti-wear agent 0.8%–1.8%,

[0008] Antifoaming agent 1%–10%,

[0009] Demulsifier 1%–10%.

[0010] The embodiments of the present invention use synthetic ester-type base oil and add composite anti-wear agents, anti-foaming agents and demulsifiers, so that the resulting gear oil product can not only meet the performance requirements of wind power gear oil, but also has good biodegradability, which is beneficial to the protection of the ecological environment.

[0011] In some embodiments, the synthetic ester-type base oil is a mixture of saturated polyol ester and polyalphaolefin, wherein the mass ratio of the saturated polyol ester to the polyalphaolefin is (10-50):(1-2), and the kinematic viscosity of the synthetic ester-type base oil at 40°C is 300 mmHg. 2 / s~500mm 2 / s.

[0012] In some embodiments, the saturated polyol ester is a trimethylolpropane complex ester; the trimethylolpropane complex ester is prepared by condensation of trimethylolpropane and dihexanoic acid.

[0013] In some embodiments, the composite anti-wear agent comprises a mixture of T321 isobutylene sulfide, AW316 phosphate ester amine salt, and T304 di-n-butyl phosphite.

[0014] In some embodiments, the amount of T321 sulfurized isobutylene added accounts for 0.4 wt% to 0.8 wt% of the wind power gear oil composition;

[0015] And / or, the amount of AW316 phosphate ester amine salt added accounts for 0.2wt% to 0.6wt% of the wind power gear oil composition;

[0016] And / or, the amount of T304 di-n-butyl phosphite added is 0.2wt% to 0.4wt% of the wind turbine gear oil composition.

[0017] In some embodiments, the antifoaming agent comprises a mixture of T922 antifoaming agent and AMH2 antifoaming agent; the mass ratio of T922 antifoaming agent to AMH2 antifoaming agent is (1-3):(2-5).

[0018] In some embodiments, the demulsifier is DL32 demulsifier; the concentration of the demulsifier is 200ppm to 400ppm.

[0019] Secondly, embodiments of the present invention also provide a method for preparing the wind turbine gear oil composition as described in the first aspect, comprising the following steps:

[0020] The synthetic ester-type base oil, composite anti-wear agent, anti-foaming agent and demulsifier are mixed in proportion to obtain the wind turbine gear oil composition.

[0021] In some embodiments, the mixing time is 1 hour to 2 hours.

[0022] Thirdly, embodiments of the present invention also propose the application of the wind power gear oil composition as described in the first aspect in wind turbine generators. Attached Figure Description

[0023] Figure 1This is a graph showing the trend of foam volume change of the wind power gear oil composition prepared in Example 1 of the present invention.

[0024] Figure 2 The diagram shows the defoaming performance test results of the wind power gear oil compositions prepared in Examples 1, 3, and 4 of this invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0026] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0027] In this document, when values ​​are described as ranges, it should be understood that such disclosure includes disclosure of all possible subranges within that range, as well as the specific numerical values ​​falling within that range, regardless of whether the specific numerical value or specific subrange is explicitly specified.

[0028] In this article, the words “contain” and “include” and their various variations mean that other elements or wholes may be included but not specifically described.

[0029] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three kinds of relationships. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone.

[0030] In a first aspect, embodiments of the present invention provide a wind turbine gear oil composition comprising the following components in weight percentages:

[0031] Synthetic ester-based base oils 80%–90%,

[0032] Composite anti-wear agent 0.8%–1.8%,

[0033] Antifoaming agent 1%–10%,

[0034] Demulsifier 1%–10%.

[0035] The embodiments of the present invention use synthetic ester-type base oil and add composite anti-wear agents, anti-foaming agents and demulsifiers, so that the resulting gear oil product has a better biodegradability rate, which ensures environmental friendliness while meeting the working requirements.

[0036] In some specific embodiments, the synthetic ester-type base oil is a mixture of saturated polyol ester and polyalphaolefin, and the mass ratio of saturated polyol ester to polyalphaolefin is (10-50):(1-2), for example, it can be 10:1, 15:2, 28:1, 30:1, 45:1 or 50:1, but is not limited to the listed values; other unlisted values ​​within this range are also applicable; and the kinematic viscosity of the synthetic ester-type base oil at 40°C is 300 mmHg. 2 / s~500mm 2 / s, for example, could be 300mm 2 / s, 320mm 2 / s, 350mm 2 / s, 400mm 2 / s, 480mm 2 / s or 500mm 2 / s, but not limited to the listed values; other unlisted values ​​within this range also apply.

[0037] Furthermore, the saturated polyol ester is a trimethylolpropane complex ester; and the trimethylolpropane complex ester is prepared by condensation of trimethylolpropane and dihexanoic acid.

[0038] By selecting trimethylolpropane complex ester as the base oil, which is biodegradable, the resulting wind turbine gear oil composition can also be biodegradable. However, since the viscosity of the trimethylolpropane complex ester base oil is relatively high, this application also adds a small amount of low-viscosity polyalphaolefin to adjust the viscosity of the base oil, so that its kinematic viscosity at 40°C is 300 mmHg. 2 / s~500mm 2 Within the range of / s.

[0039] In some specific embodiments, the composite anti-wear agent includes a mixture of T321 isobutylene sulfide, AW316 phosphate ester amine salt and T304 di-n-butyl phosphite;

[0040] Furthermore, the amount of T321 isobutylene sulfide added accounts for 0.4wt% to 0.8wt% of the wind power gear oil composition, for example, it can be 0.4wt%, 0.5wt%, 0.6wt%, 0.7wt%, or 0.8wt%, but is not limited to the listed values; other unlisted values ​​within this range are also applicable. T321 isobutylene sulfide is an extreme pressure anti-wear agent. The inventors have discovered through research that when T321 isobutylene sulfide is introduced into gear oil, the sintering load of the gear oil can be increased.

[0041] And / or, the amount of AW316 phosphate ester amine salt added is 0.2wt% to 0.6wt% of the wind power gear oil composition, for example, it can be 0.2wt%, 0.3wt%, 0.4wt%, 0.5wt% or 0.6wt%, but is not limited to the listed values, and other unlisted values ​​within this range are also applicable; the inventors have found through research that as the amount of AW316 phosphate ester amine salt added increases, the wear scar diameter of the wind power gear oil composition will decrease, but when the amount of AW316 phosphate ester amine salt added increases to 1.0%, it will lead to an increase in the wear scar diameter of the wind power gear oil composition. Therefore, this application controls the amount of AW316 phosphate ester amine salt added to be 0.2wt% to 0.6wt%.

[0042] And / or, the amount of T304 di-n-butyl phosphite added is 0.2wt% to 0.4wt% of the wind power gear oil composition, for example, it can be 0.2wt%, 0.3wt%, 0.35wt% or 0.4wt%, but is not limited to the listed values, and other unlisted values ​​within this range are also applicable; the inventors have found through research that the more T304 di-n-butyl phosphite added, the larger the wear scar diameter of the wind power gear oil composition will be. Therefore, this application controls the amount of T304 di-n-butyl phosphite added to be 0.2wt% to 0.4wt%.

[0043] In some specific embodiments, the antifoaming agent includes a mixture of T922 antifoaming agent and AMH2 antifoaming agent; and the mass ratio of T922 antifoaming agent to AMH2 antifoaming agent is (1-3):(2-5), for example, it can be 1:2, 1:5, 2:2, 2:3, 3:4 or 3:5, but is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0044] In some specific embodiments, the demulsifier is DL32 demulsifier; and the concentration of the demulsifier is 200ppm to 400ppm, for example, it can be 200ppm, 250ppm, 280ppm, 300ppm, 360ppm or 400ppm, but is not limited to the listed values, other unlisted values ​​within this range are also applicable.

[0045] DL32 is an oil-soluble polyether polymer synthesized from multiple monomers, and its structure is shown below, where R is a chain hydrocarbon.

[0046] H3C—(CH2CHO)(CH2CHO)mR

[0047] The good demulsification effect of DL32 is related to its molecular structure: the oxygen in its molecule has an affinity for water, forming multi-point adsorption, so the adsorption capacity of this type of molecule is strong; and the molecular weight of DL32 is quite large, with many branches in the molecular structure, and polar and non-polar groups are arranged alternately. The adsorbed molecules are roughly lying flat on the interface, so the intermolecular interaction is not strong, they cannot be tightly packed, and the resulting interfacial film has low strength and is easy to break.

[0048] Secondly, embodiments of the present invention also provide a method for preparing the wind turbine gear oil composition as described in the first aspect, comprising the following steps:

[0049] By mixing synthetic ester-type base oil, composite anti-wear agent, anti-foaming agent and demulsifier in a certain proportion, a wind turbine gear oil composition can be obtained.

[0050] In some specific embodiments, the mixing time is 1 hour to 2 hours, for example, it can be 1 hour, 1.5 hours, 1.8 hours or 2 hours, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0051] Thirdly, embodiments of the present invention also propose the application of the wind power gear oil composition as described in the first aspect in wind turbine generators.

[0052] The following are non-limiting embodiments and comparative examples of the present invention. It should be noted that the comparative examples are not prior art, but are only provided for comparison with the embodiments and are not intended to limit the present invention. Unless otherwise stated, all raw materials used in the embodiments and comparative examples are conventional commercially available products or can be prepared by known methods.

[0053] Example 1

[0054] This embodiment provides a wind turbine gear oil composition, comprising the following components:

[0055]

[0056] This wind turbine gear oil composition is prepared by a method comprising the following steps:

[0057] The wind turbine gear oil composition is obtained by mixing synthetic ester-type base oil, composite anti-wear agent, anti-foaming agent and demulsifier in proportion for 1 hour.

[0058] Following the method outlined in OECD 301F, the wind turbine gear oil composition prepared in this embodiment underwent a 28-day biodegradability test, and the degradation rate was calculated based on the test data. The calculated 28-day biodegradability rate of the wind turbine gear oil composition prepared in this embodiment was 78.4%.

[0059] The performance of the wind power gear oil composition prepared in this embodiment was tested using a four-ball test. The results showed that the sintering load of the wind power gear oil composition prepared in this embodiment was 315 kgf, the friction coefficient was 0.052, and the wear scar diameter was 0.239 mm.

[0060] The antifoaming performance of the wind turbine gear oil composition prepared in this embodiment was tested using the Flender antifoaming test method. The percentage increase in total volume of the wind turbine gear oil composition after 1 minute of settling following gear rotation and the percentage increase in oil vapor after 5 minutes of settling were measured. The test results are as follows: Figure 1 As shown, the results indicate that their percentages increased by 5% and 2%, respectively.

[0061] Example 2

[0062] This embodiment provides a wind turbine gear oil composition, comprising the following components:

[0063]

[0064]

[0065] This wind turbine gear oil composition is prepared by a method comprising the following steps:

[0066] The wind turbine gear oil composition is obtained by mixing synthetic ester-type base oil, composite anti-wear agent, anti-foaming agent and demulsifier in proportion for 1 hour.

[0067] Example 3

[0068] This embodiment provides a wind turbine gear oil composition, comprising the following components:

[0069]

[0070] This wind turbine gear oil composition is prepared by a method comprising the following steps:

[0071] The wind turbine gear oil composition is obtained by mixing synthetic ester-type base oil, composite anti-wear agent, anti-foaming agent and demulsifier in proportion for 1.5 hours.

[0072] Example 4

[0073] This embodiment provides a wind turbine gear oil composition, comprising the following components:

[0074]

[0075] This wind turbine gear oil composition is prepared by a method comprising the following steps:

[0076] The wind turbine gear oil composition is obtained by mixing synthetic ester-type base oil, composite anti-wear agent, anti-foaming agent and demulsifier in proportion for 1.5 hours.

[0077] Example 5

[0078] This embodiment provides a wind turbine gear oil composition, comprising the following components:

[0079]

[0080] This wind turbine gear oil composition is prepared by a method comprising the following steps:

[0081] The wind turbine gear oil composition is obtained by mixing synthetic ester-type base oil, composite anti-wear agent, anti-foaming agent and demulsifier in proportion for 2 hours.

[0082] Example 6

[0083] This embodiment provides a wind turbine gear oil composition, comprising the following components:

[0084]

[0085] This wind turbine gear oil composition is prepared by a method comprising the following steps:

[0086] The wind turbine gear oil composition is obtained by mixing synthetic ester-type base oil, composite anti-wear agent, anti-foaming agent and demulsifier in proportion for 2 hours.

[0087] Comparative Example 1

[0088] This comparative example is basically the same as Example 1, except that the amount of T321 isobutylene added in this comparative example is 0.1 wt%.

[0089] Comparative Example 2

[0090] This comparative example is basically the same as Example 1, except that the demulsifier in this comparative example is 1800X demulsifier.

[0091] Comparative Example 3

[0092] This comparative example is basically the same as Example 1, except that the antifoaming agent in this comparative example is T922 antifoaming agent.

[0093] Comparative Example 4

[0094] This comparative example is basically the same as Example 1, except that the antifoaming agent in this comparative example is AMH2 antifoaming agent.

[0095] Experimental Example 1

[0096] The sintering load (PD) of the wind turbine gear oil compositions prepared in Examples 1, 2, and Comparative Example 1, as well as pure synthetic ester-based base oil, was tested using a four-ball test. The results are shown in Table 1.

[0097] Table 1

[0098] Example 1 Example 2 Comparative Example 1 Synthetic ester base oils Sintering load (PD) 315kgf 400kgf 250kgf 200kgf

[0099] The demulsification properties of the wind turbine gear oil compositions prepared in Example 1 and Comparative Example 2 were tested according to GB / T 8022, and the results are shown in Table 2:

[0100] Table 2

[0101] Oil-to-water ratio Separate water volume emulsion volume Example 1 2％ 77mL 0.2mL Comparative Example 2 6％ 54mL <0.025mL

[0102] As shown in Table 2, the DL32 demulsifier used in Example 1 of the present invention has better demulsification performance than the 1800X demulsifier.

[0103] The defoaming performance of the wind turbine gear oil compositions prepared in Example 1, Comparative Example 3, and Comparative Example 4 was tested. The test method involved introducing air into the wind turbine gear oil composition using a high-speed rotating agitator, and observing the surface foam to determine the defoaming performance. The test conditions were: using speed setting 5, stopping stirring after 30 seconds, and observing the surface foam after 3 minutes, 8 minutes, and 13 minutes. The results are as follows: Figure 2 As shown. From Figure 2 As can be seen from the above, the combination of T922 and AMH2 as antifoaming agents in Example 1 of the present invention has the best defoaming effect and can still maintain good antifoaming performance after being filtered through a 0.8μm filter membrane.

[0104] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0105] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A wind turbine gear oil composition, characterized in that, The components include the following components by mass percentage: The synthetic ester-type base oil comprises 80%–90%, wherein the synthetic ester-type base oil is a mixture of saturated polyol ester and polyalphaolefin, and the mass ratio of the saturated polyol ester to the polyalphaolefin is (10–50):(1–2); the saturated polyol ester is trimethylolpropane complex ester, which is obtained by condensation of trimethylolpropane and dihexanoic acid. The composite anti-wear agent comprises 0.8% to 1.8%, wherein the composite anti-wear agent includes a mixture of T321 isobutylene sulfide, AW316 phosphate ester amine salt, and T304 di-n-butyl phosphite; the amount of T321 isobutylene sulfide added accounts for 0.4wt% to 0.8wt% of the wind power gear oil composition, the amount of AW316 phosphate ester amine salt added accounts for 0.2wt% to 0.6wt% of the wind power gear oil composition, and the amount of T304 di-n-butyl phosphite added accounts for 0.2wt% to 0.4wt% of the wind power gear oil composition. The antifoaming agent is 1% to 10%, wherein the antifoaming agent comprises a mixture of T922 antifoaming agent and AMH2 antifoaming agent; the mass ratio of T922 antifoaming agent to AMH2 antifoaming agent is (1 to 3):(2 to 5); The demulsifier is 1% to 10%, wherein the demulsifier is DL32 demulsifier; the concentration of the demulsifier is 200 ppm to 400 ppm.

2. The wind turbine gear oil composition according to claim 1, characterized in that, The kinematic viscosity of the synthetic ester-type base oil at 40°C is 300 mm. 2 / s~500mm 2 / s.

3. The method for preparing the wind turbine gear oil composition according to claim 1 or 2, characterized in that, Includes the following steps: The synthetic ester-type base oil, composite anti-wear agent, anti-foaming agent and demulsifier are mixed in proportion to obtain the wind turbine gear oil composition.

4. The method for preparing the wind turbine gear oil composition according to claim 3, characterized in that, The mixing time is 1 to 2 hours.

5. The application of the wind turbine gear oil composition according to claim 1 or 2 in a wind turbine generator.

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