A wind power lubricating composition with excellent friction reduction and anti-wear performance

Abstract

The present invention provides a wind power lubricating composition with excellent anti-friction and anti-wear performance, which comprises the following components by mass percentage: 5-8 parts of extreme pressure anti-wear agent; 0.05-0.2 parts of metal deactivator; 1-2 parts of antioxidant; 5-15 parts of mineral oil; and the balance of base oil. Beneficial effects of the present invention: the grease composition exhibits extremely excellent tribological properties, and its anti-friction and anti-wear performance is better than that of domestic wind power grease of the same consistency level, and is also better than that of foreign brands of grease of the same consistency level. It is suitable for the long-term use of wind power main bearings to meet the requirements of anti-wear performance, and this advantage is mainly reflected in the reduction of wear spot diameter and the reduction of friction coefficient.

Description

Technical Field

[0001] The invention belongs to the technical field of lubrication, and in particular relates to a wind power lubricating composition with excellent friction reduction and anti-wear performance. Background Art

[0002] Wind energy is one of the most abundant renewable energy sources in the world. According to the Global Wind Energy Council, the world's new wind power installed capacity will reach 77.6GW in 2022, and the global cumulative wind power installed capacity will reach 906GW. In the next five years, the global new wind power grid-connected capacity will reach 680GW. my country is the world's largest wind power market. By the end of 2022, my country's cumulative wind power installed capacity will be 365 million kilowatts.

[0003] A general wind turbine includes blades (paddles), a tower (pillars), and a nacelle (the main body that generates power). The grease composition is used in the main shaft support bearings that rotate the blades by wind force, the blade bearings used in the pitch disk of the blades, the yaw rotation bearings used in the yaw disk of the nacelle, etc.

[0004] The high temperature performance, extreme pressure anti-wear performance, service life and other issues of the grease composition cannot meet the requirements of the prior art. Summary of the invention

[0005] In view of this, the present invention aims to provide a wind power lubricating composition with excellent friction reduction and anti-wear performance to solve at least one of the above problems.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A wind power lubricating composition with excellent friction reduction and anti-wear performance comprises the following components by mass percentage:

[0008]

[0009]

[0010] Furthermore, the extreme pressure anti-wear agent includes acidic phosphate amine salt, tricresyl phosphate, triphenyl thiophosphate, aminothiocarboxylate, MoS 2 -One or more of MXene composite materials

[0011] Preferably, the extreme pressure anti-wear agent is tricresol phosphate, acidic phosphate amine salt, triphenyl thiophosphate, aminothiocarboxylate and MoS 2 -One or more of MXene composite materials.

[0012] Furthermore, MoS 2 The preparation of MXene composite materials includes the following steps:

[0013] S1: Preparation of flower-shaped MoS 2 ;

[0014] S2: Preparation of MXene-PDA nanosheets;

[0015] S3: Flower ball MoS 2 MoS prepared with MXene-PDA nanosheets 2 -MXene composites.

[0016] Furthermore, in step S1, the flower ball-shaped MoS 2 The method comprises the following steps: adding ammonium molybdate and thiourea into water, adding polyethylene glycol, reacting at a certain temperature for a period of time, cooling, centrifuging to obtain a precipitate, and drying the precipitate;

[0017] Preferably, ammonium molybdate and thiourea are added to deionized water to obtain a mixed solution, and the volume of the mixed solution is the same as the volume of the polyethylene glycol added; the mixed solution and the polyethylene glycol are fully mixed under magnetic stirring, and reacted at 180° C.-220° C. for 16-22 hours;

[0018] Preferably, after cooling, the solution is transferred to a centrifuge tube and washed with deionized water until the supernatant becomes transparent, and then the washed precipitate is taken out and placed in an oven for drying.

[0019] Further, the preparation of MXene-PDA nanosheets in step S2 includes: adding dopamine and Ti into Tris buffer. 3 C 2 The nanosheets are obtained by mixing the mixed solution, the mixed solution is ultrasonically treated in an ultrasonic cell disruptor for a period of time, magnetically stirred at room temperature, the solution is washed with deionized water, and then freeze-dried to obtain MXene-PDA nanosheets;

[0020] Preferably, the volume of Tris buffer is 8-12 mM and the pH is ≈ 8-9.

[0021] Furthermore, in step S3, MXene-PDA and MoS 2 A certain amount of N-methylpyrrolidone was added; the mixture was then sonicated in an ultrasonic cell disruptor and then magnetically stirred at room temperature to ensure that MXene-PDA and MoS 2 MoS 2 -MXene composites.

[0022] Further, the metal deactivator is a benzotriazole derivative;

[0023] The benzotriazole derivatives include one or more of benzotriazole octadecylamine salt, benzotriazole octadecylamine salt and N,N-di-n-butylaminomethylenebenzotriazole.

[0024] Preferably, the metal deactivator is N,N-di-n-butylaminomethylenebenzotriazole or benzotriazole derivatives.

[0025] Further, the antioxidant includes two or three of phenolic antioxidants, amine antioxidants, and high molecular weight phenolic antioxidants;

[0026] Preferably, the antioxidant is 2,6-di-tert-butyl-p-methylphenol and octyl / butyl diphenylamine.

[0027] Further, the mineral oil is 150BS and 500N.

[0028] Further, the base oil is a mixture of ester oil and PAO;

[0029] The ester oil includes one or more of polyol esters and / or diesters;

[0030] The PAO includes one or both of PAO40 and PAO100.

[0031] The additive is compounded with a variety of extreme pressure anti-wear agents, antioxidants, metal deactivators and antioxidants and corrosion inhibitors. One of the homemade extreme pressure anti-wear agents has a unique structure, which links Ti3C2Tx MXene nanosheets with flower-shaped molybdenum disulfide through the "bridge" effect of dopamine to form a stable composite structure. This structure alleviates the restacking phenomenon between solid fillers through the nano-space hindrance effect, thereby enhancing the dispersibility of the composite structure in the grease. At the same time, it has little effect on other properties of the composite lithium-based grease, and still has excellent high temperature resistance, colloidal stability, etc.

[0032] Compared with the prior art, the wind power lubricating composition with excellent friction reduction and anti-wear performance described in the present invention has the following advantages:

[0033] The grease composition exhibits extremely excellent tribological properties, and its anti-friction and anti-wear properties are better than domestic wind power greases of the same consistency level, and are also better than foreign brands of greases of the same consistency level. It is suitable for the long-term use of wind power main bearings to meet the requirements of anti-wear performance. This advantage is mainly reflected in the reduction of wear spot diameter and friction coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0035] Figure 1The MoS described in Example 2 of the present invention 2 -Schematic diagram of MXene composites;

[0036] Figure 2 The MoS described in Example 2 of the present invention 2 -Schematic diagram of high-resolution transmission electron microscopy images of MXene composite materials;

[0037] Figure 3 The MoS described in Example 2 of the present invention 2 -EDS spectrum of MXene composite material. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0040] Flower-shaped MoS 2 Preparation

[0041] 0.7358g of ammonium molybdate and 1.3572g of thiourea were added to deionized water, followed by sufficient stirring to dissolve them completely. Next, an equal volume of polyethylene glycol 400 was added to the solution and stirred for 20 minutes under magnetic stirring. After thorough mixing, the solution was poured into a reactor and reacted at 180°C-220°C for 16-22 hours. After cooling, the solution was transferred to a centrifuge tube and washed with deionized water until the supernatant became transparent. Then, the washed black precipitate was taken out and dried in an oven to prepare a flower ball-shaped MoS 2。

[0042] Preparation of MXene-PDA nanosheets

[0043] In 1000 mL of Tris buffer (8-12 mmol, pH ≈ 8.5), add 400-500 mg dopamine and 300-500 mg Ti 3 C 2 The mixed solution was ultrasonicated in an ultrasonic cell disruptor for 1-3 h and then subjected to long-term magnetic stirring at room temperature. Subsequently, the solution was washed with deionized water and then freeze-dried to prepare MXene-PDA nanosheets.

[0044] MoS 2 - Preparation of MXene composites

[0045] MXene-PDA and MoS 2The mixture was then sonicated in an ultrasonic cell disruptor and then magnetically stirred for a long time at room temperature to ensure that MXene-PDA and MoS 2 The MoS 2 -MXene composites.

[0046]

[0047] Tricresyl phosphate was purchased from Zibo Huihua Petroleum Additives Co., Ltd., code T306;

[0048] Acidic phosphate amine salt was purchased from Shenyang Hualun Lubricant Additive Co., Ltd., code T308;

[0049] Triphenyl thiophosphate was purchased from Jinzhou Shengda Chemical Co., Ltd., code T309;

[0050] Aminothiocarboxylate was purchased from Shenyang Hualun Lubricant Additive Co., Ltd., code T323;

[0051] N,N-di-n-butylaminomethylenebenzotriazole was purchased from Jinzhou Xinxing Petroleum Additives Co., Ltd., code T551;

[0052] Benzotriazole derivatives were purchased from Changsha Wangcheng Petrochemical Co., Ltd., code T553;

[0053] 2,6-di-tert-butyl-p-methylphenol was purchased from Jinzhou Xinxing Petroleum Additives Co., Ltd., code T501;

[0054] Octyl / butyl diphenylamine was purchased from Jinzhou Xinxing Petroleum Additives Co., Ltd., code T557;

[0055] Implementation 1:

[0056] Trimethyl phosphate (T306) is 1.2 g, acidic phosphate amine (T308) is 1.2 g, triphenyl thiophosphate (T309) is 1.2 g, aminothiocarboxylate (T323) is 1.2 g, and flower ball MoS 2 1.2g; N,N-di-n-butylaminomethylenebenzotriazole (T551) is 0.05g, benzotriazole derivative (T553) is 0.05g;

[0057] 2,6-di-tert-butyl-p-methylphenol (T501) is 0.75 g, octyl / butyl diphenylamine (T557) is 0.75 g, mineral oil (150BS 500N) is 10 g, the total amount is 100 g, and the rest is PAO (PAO100 and PAO40).

[0058] Implementation 2:

[0059] Trimethyl phosphate (T306) is 1.2 g, acidic phosphate amine (T308) is 1.2 g, triphenyl thiophosphate (T309) is 1.2 g, aminothiocarboxylate (T323) is 1.2 g, MoS 2 -MXene composite material is 1.2g; N,N-di-n-butylaminomethylenebenzotriazole (T551) is 0.05g, and benzotriazole derivative (T553) is 0.05g;

[0060] 2,6-di-tert-butyl-p-methylphenol (T501) is 0.75 g, octyl / butyl diphenylamine (T557) is 0.75 g, mineral oil (150BS 500N) is 10 g, the total amount is 100 g, and the rest is PAO (PAO100 and PAO40).

[0061] Implementation 3:

[0062] Tricresol phosphate (T306) is 1.2 g, acidic phosphate amine (T308) is 1.2 g, triphenyl thiophosphate (T309) is 1.2 g, aminothiocarboxylate (T323) is 1.2 g, MXene-PDA nanosheets are 1.2 g; N, N-di-n-butylaminomethylenebenzotriazole (T551) is 0.05 g, and benzotriazole derivative (T553) is 0.05 g;

[0063] 2,6-di-tert-butyl-p-methylphenol (T501) is 0.75 g, octyl / butyl diphenylamine (T557) is 0.75 g, mineral oil (150BS (Mobil) 500N (PetroChina Dalian Petrochemical Company)) is 10 g, the total amount is 100 g, and the rest is PAO (PAO100 and PAO40).

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind power lubricating composition with excellent friction reduction and anti-wear performance, characterized in that: Calculated by mass percentage, it includes the following components: 5-8 parts of extreme pressure anti-wear agent; Metal deactivator 0.05-0.2 parts; 1-2 parts of antioxidant; Mineral oil 5-15 parts; Base oil balance; The extreme pressure anti-wear agent is tricresol phosphate, acidic phosphate amine salt, triphenyl thiophosphate, aminothiocarboxylate and MoS2-MXene composite material; The preparation of MoS2-MXene composite materials includes the following steps: S1: Preparation of flower ball-shaped MoS2; S2: Preparation of MXene-PDA nanosheets; S3: MoS2-MXene composite material was prepared by flower-ball-shaped MoS2 and MXene-PDA nanosheets; The preparation of flower-shaped MoS2 in step S1 comprises the following steps: adding ammonium molybdate and thiourea to water, adding polyethylene glycol, reacting at a certain temperature for a period of time, cooling, centrifuging to obtain a precipitate, and drying the precipitate; The step S2 of preparing MXene-PDA nanosheets includes: adding dopamine and Ti3C2 nanosheets to a Tris buffer to obtain a mixed solution, ultrasonically treating the mixed solution in an ultrasonic cell disruptor for a period of time, magnetically stirring at room temperature, washing the solution with deionized water, and then freeze-drying to obtain MXene-PDA nanosheets; In step S3, MXene-PDA and MoS2 are added to a certain amount of N-methylpyrrolidone; the mixture is then ultrasonically treated in an ultrasonic cell disruptor and then magnetically stirred at room temperature to ensure that MXene-PDA and MoS2 are fully combined to prepare a MoS2-MXene composite material.

2. A wind power lubricating composition with excellent friction reduction and anti-wear performance according to claim 1, characterized in that: Ammonium molybdate and thiourea are added to deionized water to obtain a mixed solution, the volume of the mixed solution being the same as the volume of the added polyethylene glycol; the mixed solution and the polyethylene glycol are fully mixed under magnetic stirring, and then reacted at 180° C.-220° C. for 16-22 hours.

3. A wind power lubricating composition with excellent friction reduction and anti-wear performance according to claim 1, characterized in that: After cooling, the solution was transferred to a centrifuge tube and washed with deionized water until the supernatant became transparent, and then the washed precipitate was taken out and placed in an oven for drying.

4. A wind power lubricating composition with excellent friction reduction and anti-wear performance according to claim 1, characterized in that: The volume of Tris buffer is 8-12 mM, pH=8-9.

5. The wind power lubricating composition with excellent friction reduction and anti-wear performance according to claim 1, characterized in that: In step S3, MXene-PDA and MoS2 are added to a certain amount of N-methylpyrrolidone; the mixture is then ultrasonically treated in an ultrasonic cell disruptor and then magnetically stirred at room temperature to ensure that MXene-PDA and MoS2 are fully combined to prepare a MoS2-MXene composite material.

6. A wind power lubricating composition with excellent friction reduction and anti-wear performance according to claim 1, characterized in that: The metal deactivator is a benzotriazole derivative; The benzotriazole derivatives include one or more of benzotriazole octadecylamine salt and N,N-di-n-butylaminomethylenebenzotriazole.

7. The wind power lubricating composition with excellent friction reduction and anti-wear performance according to claim 1, characterized in that: The metal deactivator is N,N-di-n-butylaminomethylenebenzotriazole, T553.

8. The wind power lubricating composition with excellent friction reduction and anti-wear performance according to claim 1, characterized in that: The antioxidants are 2,6-di-tert-butyl-p-methylphenol and octyl / butyl diphenylamine.

9. A wind power lubricating composition with excellent friction reduction and anti-wear performance according to claim 1, characterized in that: The mineral oils are 150BS and 500N.

10. A wind power lubricating composition with excellent friction reduction and anti-wear performance according to claim 1, characterized in that: The base oil is a mixture of ester oil and PAO; The ester oil includes one or more of polyol esters and / or diesters; The PAO includes one or both of PAO40 and PAO100.

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