CN115595194A - Long-life antioxidant wear-resistant wind power gear oil and preparation method thereof - Google Patents

Abstract

The invention discloses long-life antioxidant and antiwear wind power gear oil which is prepared from metallocene poly-alpha olefin base oil, alkyl naphthalene base oil, polyol ester, a gear oil composite additive detergent dispersant, an antioxidant, an extreme pressure antiwear agent, an antifriction agent and a non-silicon defoamer. The wind power gear oil has high viscosity index, the average viscosity index can reach 196, and the wind power gear oil has better high and low temperature adaptability; the pour point is lower than-46 ℃, and the method is applicable to lower ambient temperature; the diameter of the abrasion spot can be reduced to 0.19mm, and the better extreme pressure abrasion resistance is realized; has excellent oxidation resistance and long service life, and can be replaced for more than 5 years.

Description

Long-life antioxidant wear-resistant wind power gear oil and preparation method thereof

Technical Field

The invention belongs to the technical field of lubricating oil, and particularly relates to long-life antioxidant wear-resistant wind power gear oil and a preparation method thereof.

Background

Wind power generation is one of the most main clean energy power generation modes at present, china has abundant wind resources, wind power generation projects are distributed to all over the country, from the northeast, the northwest to the south of the sea, and from the east coast to the west plateau, and therefore higher requirements are provided for the manufacturing and performance of a fan.

Moreover, with the increasing installation capacity of the single machine, the requirement on the core transfer equipment is also higher and higher. The operation state and performance of the gear box, which is one of the most core devices of wind power generation, directly determine the working performance and service life of the wind turbine. The gearbox mainly has the functions of transmitting power generated by blades of the fan under the action of wind power to the generator and simultaneously increasing the lower rotating speed to the corresponding rotating speed suitable for power generation through the gear set, so that the wind power gearbox is also called as a speed increasing box and needs to bear larger torque. Meanwhile, due to the changeability and instability of factors such as the speed and the wind direction of wind and the like, the rotating speed and the rotating direction of the blades are also changed continuously, so that the load transmitted to the gear box is also very complex variable load, and the requirement on gear lubricating oil in the gear box is higher. Therefore, the index requirement of the lubricating oil of the wind power gear box is always the highest in the gear oil series.

The fatigue abrasion of the gear, which is easily caused by the long-term low-speed heavy-load operation condition of the wind power gear box, generates a micro-pitting phenomenon, and then influences the precision of gear transmission and the service life of the gear. Therefore, the wind power gear oil with good performance also has good micro-pitting corrosion resistance. And because the usage of the base oil of the wind power gear oil is very high and is higher than 95%, the selection of the base oil has decisive influence on the performance of the gear oil.

In addition to the requirement of internal lubrication of the gear box, the external environment also puts higher demands on wind power gear oil, and firstly, the gear oil has excellent high and low temperature performance, can cope with extremely cold winter at-30-40 ℃ in the north and also can adapt to high temperature of 40-50 ℃ in the field in summer. Secondly, because the wind farm is generally in mountains, wastelands, oceans and the like, the difficulty and danger coefficient of oil change operation are high, and therefore, the oil product is required to have a longer service life as far as possible.

At present, wind power gear oil is mainly prepared by using a composite additive of Poly Alpha Olefin (PAO), metallocene poly alpha olefin (mPAO) base oil and gear oil, and can generally meet the requirement of 3-year oil change period of the existing wind power gear box. The design life of the fan is commonly 20-25 years, the replacement of lubricating oil is one of the most important works for the after-sale maintenance work of the fan, if the fan is replaced once according to 3 years, each fan is expected to be replaced by 7-8 times of lubricating oil in the life cycle, for a wind power operation unit, the fan is not only a large expenditure, but also needs to be stopped during maintenance, the power generation amount of the fan is reduced, meanwhile, the oil replacement work belongs to high-altitude work, and the more frequent replacement also increases the personnel cost. Therefore, the development of the wind power gear oil with better oxidation resistance and wear resistance and longer service cycle is very significant and has obvious economic benefit.

Disclosure of Invention

Based on the background, the invention provides the antioxidant wear-resistant wind power gear oil with high viscosity index, long ROBT oxidation induction period, low pour point temperature and long service life and the preparation method thereof.

The technical scheme of the invention is as follows:

the long-life antioxidant antiwear wind power gear oil is prepared with metallocene polyalpha olefin base oil 45-65 wt%, alkyl naphthalene base oil 15-25 wt%, polyol ester 15-25 wt%, gear oil composite additive 2-3.5 wt%, detergent dispersant 0.5-1.5 wt%, antioxidant 0.5-1 wt%, extreme pressure antiwear agent 1-2.5 wt%, antifriction agent 0.2-0.8 wt% and non-silicon defoaming agent 0.01-0.03 wt%.

Further, the metallocene poly a olefin base oil comprises at least one of mPAO300, mPAO 150, or mPAO 65.

Further, the alkyl naphthalene base oil includes at least one of alkyl naphthalene AN 23 or alkyl naphthalene AN 5.

The detergent dispersant is at least one of synthetic calcium sulfonate T106D and boronized polyisobutylene succinimide T154B.

Further, the antioxidant is at least one of diphenylamine antioxidant and phenol antioxidant.

Further, the extreme pressure anti-wear agent is zinc dialkyl dithiophosphate ZDDP or sulfur nitrogen benzene borate.

Further, the friction reducer is non-sulfur-phosphorus type organic molybdenum.

Further, it comprises the following steps:

s1: under the protection of nitrogen, the metallocene poly-alpha olefin base oil and the alkyl naphthalene base oil with the proportion are stirred and mixed, and the temperature is raised to 55-60 ℃;

s2: adding the gear oil composite additive with the components in proportion, maintaining the temperature at 55-60 ℃, and continuing stirring;

s3: continuously adding the polyol ester with the proportion components, maintaining the temperature at 55-60 ℃, and continuously stirring;

s4: sequentially adding the detergent dispersant, the antioxidant, the extreme pressure antiwear agent and the antifriction agent in proportion, maintaining the temperature at 55-60 ℃, and continuing stirring;

s5: adding the non-silicon type defoaming agent with the proportion components, maintaining the temperature at 55-60 ℃, continuing to stir for a period of time, stopping heating, and continuing to stir for a period of time to obtain the silicon-based defoaming agent.

Compared with the prior art, the invention has the beneficial effects that:

(1) the alkyl naphthalene base oil added into the wind power gear oil has better oxidation stability, especially thermal stability, and the compound addition in a certain proportion can improve the stability of the wind power gear oil in high-temperature work, delay the performance attenuation of the gear oil and prolong the service life of the gear oil;

the alkyl naphthalene has a certain additive solubilization effect, and can improve the disadvantage of poor solubility of the gear oil composite additive compared with the poly-alpha olefin base oil;

(2) the polyol ester added into the wind power gear oil has a very good solubilizing effect, and the solubility of the gear oil composite additive can be further improved;

the polyol ester has polarity and metal affinity, is easy to adsorb on the metal surface to form a durable oil film protective layer, and can greatly reduce the metal surface abrasion at the starting moment, reduce the micro-pitting corrosion and tooth surface abrasion and prolong the service life of the gear due to the existence of the oil film adsorption layer particularly when the machine is stopped and restarted;

(3) the detergent dispersant added into the wind power gear oil mainly disperses impurities such as oil sludge, carbon deposit and the like of a product in the gear operation process into the oil product to avoid agglomeration and precipitation, and then is filtered out when passing through a filter, so that the oil product can be kept clean for a long time.

(4) The antioxidant added into the wind power gear oil further improves the oxidation resistance of the oil product and delays the oxidation of the oil product.

(5) The extreme pressure antiwear agent added into the wind power gear oil is mainly used for solving the problems of abrasion and scratch caused by the oil film rupture of a local tooth surface when a gear is impacted by a large load, improving the anti-extrusion capacity of the gear and effectively avoiding or inhibiting the formation and the occurrence of pitting corrosion.

(6) The non-silicon defoaming agent added into the wind power gear oil can be prevented from being filtered out and losing defoaming capability too quickly while providing good defoaming performance, so that cavitation erosion and micro pitting erosion of the tooth surface caused by foam generation are avoided.

(7) Experimental data show that compared with products on the market, the oxidation induction period of the wind power gear oil can be improved by about 60%; lifting; the average viscosity index can be as high as 196, and the better high and low temperature adaptability is realized; the minimum pour point temperature can reach-46 ℃, and the method can be suitable for lower ambient temperature; the diameter of the abrasive wear can be reduced to about 0.19mm, and the wear-resisting property is better.

The invention has better oxidation resistance, can prolong the service life of the product, and can be replaced for more than 5 years.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.

Metallocene poly-a olefin base oil: mPAO300, mPAO 150 or mPAO 65 are all produced by Mobil chemical industry;

the alkyl naphthalene AN 23 and the alkyl naphthalene AN 5 are produced by Mobil chemical industry;

the polyol ester is selected from saturated polyol ester 3970 of CRODA or saturated polyol ester NP343 both produced by Mobil chemical industry;

the gear oil composite additive is IG93MB of Lubrizol company or H8018A of Whihua company;

the antioxidant is selected from diphenylamine antioxidant L57 or phenol antioxidant L135 produced by BASF;

the friction reducer is selected from non-sulfur-phosphorus type organic molybdenum M855 or 4716;

the non-silicon type defoaming agent is selected from non-silicon type composite defoaming agents T922 or H2030;

example 1: a long-life antioxidant wear-resistant wind power gear oil, which comprises the following components in percentage by weight,

the lubricant is prepared from 49.5% of metallocene poly-alpha olefin base oil (mPAO 300), 25% of alkyl naphthalene AN 5, 25% of polyol ester, 2.68% of gear oil compound additive IG93MB, 0.5% of detergent dispersant T106D, 0.5% of antioxidant L57, 1.5% of extreme pressure antiwear agent (thionitrobenzoate SNBA), 0.3% of antifriction agent M855 and 0.02% of non-silicon type defoamer H2030.

The preparation procedure of this example is as follows:

s1: replacing air in a reactor with nitrogen, taking 49.5 percent of metallocene poly-alpha-olefin (mPAO 300) and 20 percent of alkyl naphthalene AN 5 according to mass fraction under the protection of nitrogen atmosphere, stirring and heating to 55-60 ℃;

s2: adding a gear oil composite additive IG93MB with the component content of 2.68% into the reactor, and continuously stirring for 20min;

s3: adding 25% polyol ester 3970, and stirring for 15min;

s4: sequentially adding 0.5% of detergent dispersant T106D, 0.5% of antioxidant L57, 1.5% of extreme pressure antiwear agent self-made thiazaboronate SNBA and 0.3% of antifriction agent M855, and continuously stirring for 15min;

s5: adding 0.02% non-silicon type defoaming agent H2030, stirring for 15min, stopping heating, stirring for 30min, cooling, and sampling for detection.

Example 2: the long-life antioxidant wear-resistant wind power gear oil is prepared from the following components in percentage by weight,

the lubricant is prepared from 40% of metallocene poly-a olefin base oil (mPAO 150), 15% of metallocene poly-a olefin base oil (mPAO 65), 18% of alkyl naphthalene AN 23, 20% of polyol ester NP343, 2.68% of gear oil compound additive IG93MB, 0.5% of detergent dispersant T154B, 0.5% of antioxidant L57, 1.5% of extreme pressure antiwear agent (thionitrobenzeneborate SNBA), 0.3% of friction reducer M855 and 0.02% of non-silicon type defoamer T922.

The preparation procedure of this example is as follows:

s1: replacing air in a reactor with nitrogen, taking metallocene poly-alpha-olefin (mPAO 150 is 40%, mPAO 65 is 15%) and 18% of alkyl naphthalene AN 23 according to mass fraction under the protection of nitrogen atmosphere, stirring and heating to 55-60 ℃;

s2: adding a gear oil composite additive IG93MB with the component content of 2.68 percent, and continuously stirring for 20min;

s3: adding 20% of polyol ester NP343, stirring for 15min:

s4: sequentially adding 0.5% of detergent dispersant T154B, 0.5% of antioxidant L57, 1.5% of extreme pressure antiwear agent self-made thiazaboronate SNBA and 0.3% of antifriction agent M855, and continuously stirring for 15min;

s5: and adding a non-silicon defoamer T922 with the component content of 0.02%, stirring for 15min, stopping heating, continuing stirring for 30min, cooling, and sampling for detection.

Example 3: the long-life antioxidant wear-resistant wind power gear oil is prepared from the following components in percentage by weight,

the lubricant is prepared from 30% of metallocene poly-a olefin base oil (mPAO 300), 20% of metallocene poly-a olefin base oil (mPAO 65), 24.8% of alkyl naphthalene AN 5, 20% of polyol ester NP343,2.37% of gear oil compound additive H8018A, 0.5% of detergent dispersant T06D, 0.5% of antioxidant L135, 1.5% of extreme pressure antiwear agent (thionitrobenzeneborate SNBA), 0.3% of antifriction agent 4716 and 0.02% of non-silicon type defoamer T922.

The preparation procedure of this example is as follows:

s1: replacing air in a reactor with nitrogen, taking metallocene poly-alpha-olefin (30% of mPAO300 and 20% of mPAO 65) and 24.8% of alkyl naphthalene AN 5 according to mass fraction under the protection of nitrogen atmosphere, stirring and heating to 55-60 ℃;

s2: adding 2.37% of gear oil composite additive H8018A, and stirring for 20min;

s3: adding 20% of polyol ester NP343, and stirring for 15min;

s4: sequentially adding 0.5% of detergent dispersant T06D, 0.5% of antioxidant L135, 1.5% of extreme pressure antiwear agent self-made azobenzol borate SNBA and 0.3% of antifriction agent 4716, and continuously stirring for 15min;

s5: adding 0.03% non-silicon type defoaming agent T922, stirring for 15min, stopping heating, stirring for 30min, cooling, and sampling for detection.

Comparative example 1: a wind power gear oil is prepared from 20% of metallocene poly-a olefin base oil (mPAO 300), 30% of metallocene poly-a olefin base oil (mPAO 65), 24.8% of poly-alpha olefin Durasyn 180R, 20% of polyol ester NP343,2.37% of gear oil composite additive H8018A, 0.5% of detergent dispersant T06D, 0.5% of antioxidant L135, 1.5% of extreme pressure antiwear agent (thionitrobenzeneborate SNBA), 0.3% of antifriction agent 4716 and 0.02% of non-silicon type defoamer T922.

This example compared to example 3 where the alkyl naphthalene base oil was replaced with a polyalphaolefin.

The procedure of this example is the same as example 3, except that the alkylnaphthalene AN 5 in step S1 is replaced with a polyalphaolefin.

Comparative example 2: a wind power gear oil is prepared from 50% of metallocene poly-alpha olefin base oil (mPAO 300), 34.8% of poly-alpha olefin Durasyn 168, 10% of polyol ester NP343,2.37% of gear oil composite additive H8018A, 0.5% of detergent dispersant T06D, 0.5% of antioxidant L135, 1.5% of extreme pressure antiwear agent (thionitrobenzoate SNBA), 0.3% of antifriction agent 4716 and 0.02% of non-silicon type defoamer T922.

In this example, compared to example 3, the alkyl naphthalene base oil and part of the polyol ester are replaced by polyalphaolefin.

The preparation procedure of this example is as follows:

s1: after air in the reactor is replaced by nitrogen, taking 50% of metallocene poly alpha olefin and 34.8% of poly alpha olefin according to mass fraction under the protection of nitrogen atmosphere, stirring and heating to 55-60 ℃;

s2: adding 2.37% of gear oil composite additive H8018A, and continuing stirring for 20min;

s3: continuously adding the polyol ester with the proportion components, maintaining the temperature at 55-60 ℃, and continuously stirring;

s4: sequentially adding 0.5% of detergent dispersant T06D, 0.5% of antioxidant L135, 1.5% of extreme pressure antiwear agent self-made azobenzol borate SNBA and 0.3% of antifriction agent 4716, and continuously stirring for 15min;

s5: adding 0.02% non-silicon type defoaming agent T922, stirring for 15min, stopping heating, stirring for 30min, cooling, and sampling for detection.

In order to better illustrate the performance of the micro-pitting corrosion resistant wind power gear oil provided by the embodiment of the invention, the wind power gear oils prepared in the above embodiments 1 to 3 and comparative examples 3 to 4 are respectively subjected to performance tests, and table 1 is main index detection data of the wind power gear oils prepared in the embodiments 1 to 3 and comparative examples 3 to 4.

In order to better compare the performance improvement of the invention with the prior art, two searched patents which disclose the most similar technical scheme to the invention are taken as a comparative example 3 and a comparative example 4, the comparative example 3 is 'a micro-pitting resistant wind power gear oil and a preparation method thereof' with the application number of 202111021965.5, the comparative example 4 is 'a wind generating set gear oil and a preparation method thereof' with the application number of 201910118211.8, and the data of the comparative example 3 and the comparative example 4 are the optimal data disclosed by the embodiment; and the gear oil of a certain brand on the current market is used as the gear oil to be compared with the gear oil of a certain brand on the current market 5.

TABLE 1 wind turbine gear oil main index detection data

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (8)

1. The long-life antioxidant and antiwear wind power gear oil is characterized by being prepared from 45-65 wt% of metallocene poly-alpha olefin base oil, 15-25 wt% of alkyl naphthalene base oil, 15-25 wt% of polyol ester, 2-3.5 wt% of gear oil composite additive, 0.5-1.5 wt% of detergent dispersant, 0.5-1 wt% of antioxidant, 1-2.5 wt% of extreme pressure antiwear agent, 0.2-0.8 wt% of antifriction agent and 0.01-0.03 wt% of non-silicon defoaming agent.

2. The long life, oxidation resistant, anti-wear wind turbine gear oil of claim 1 wherein said metallocene poly a olefin base oil comprises at least one of mPAO300, mPAO 150, or mPAO 65.

3. The long life antioxidant antiwear wind turbine gear oil in accordance with claim 1, wherein said alkyl naphthalene base oil comprises at least one of alkyl naphthalene AN 23 or alkyl naphthalene AN 5.

4. The long-life antioxidant antiwear wind power gear oil as set forth in claim 1, wherein said detergent dispersant is at least one of synthetic calcium sulfonate T106D and boronized polyisobutylene succinimide T154B.

5. The long-life antioxidant and antiwear wind power gear oil as set forth in claim 1, wherein said antioxidant is at least one of diphenylamine type antioxidant and phenol type antioxidant.

6. The long-life antioxidant antiwear wind power gear oil according to claim 1, wherein the extreme pressure antiwear agent is zinc dialkyldithiophosphate (ZDDP) or phenyl thionoate borate.

7. The long-life antioxidant antiwear wind power gear oil according to claim 1, wherein the friction reducer is a non-sulfur-phosphorus type organic molybdenum.

8. The preparation method of the long-life antioxidant and antiwear wind power gear oil as claimed in any one of claims 1 to 7, characterized by comprising the following steps:

s1: under the protection of nitrogen, the metallocene poly-alpha olefin base oil and the alkyl naphthalene base oil with the proportion are stirred and mixed, and the temperature is raised to 55-60 ℃;

s2: adding the gear oil composite additive with the components in proportion, maintaining the temperature at 55-60 ℃, and continuing stirring;

s3: continuously adding the polyol ester with the proportion components, maintaining the temperature at 55-60 ℃, and continuously stirring;

s4: sequentially adding the detergent dispersant, the antioxidant, the extreme pressure antiwear agent and the antifriction agent in proportion, maintaining the temperature at 55-60 ℃, and continuing stirring;

s5: adding the non-silicon type defoaming agent with the proportion components, maintaining the temperature at 55-60 ℃, continuing to stir for a period of time, stopping heating, and continuing to stir for a period of time to obtain the silicon-based defoaming agent.