CN107723063B

CN107723063B - Special long-service-life lubricating grease for soap-free wind power bearing and preparation method thereof

Info

Publication number: CN107723063B
Application number: CN201710908037.8A
Authority: CN
Inventors: 田晓如; 徐芹龙; 王殿平; 张沾; 宋桂林
Original assignee: Xinjiang Jinxuechi Technology Co ltd
Current assignee: Xinjiang Jinxuechi Technology Co ltd
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2023-07-04
Anticipated expiration: 2037-09-29
Also published as: CN107723063A

Abstract

The invention relates to the technical field of lubricating grease for wind power bearings, in particular to long-service-life special lubricating grease for a soap-free wind power bearing and a preparation method thereof, wherein the raw materials comprise base oil, a thickening agent, an extreme pressure antiwear agent, an antioxidant and an anti-corrosion antirust agent; firstly mixing a thickening agent and base oil, uniformly stirring, then adding an extreme pressure antiwear agent, an antioxidant and an anti-corrosion antirust agent into the mixture, and uniformly stirring to obtain the special long-service-life lubricating grease for the soap-free wind power bearing. The special lubricating grease for the wind power bearing, provided by the invention, has excellent adhesion performance, extreme pressure wear resistance, oxidation resistance, excellent corrosion resistance, better flow characteristic and better lubricity, can adapt to extremely severe environmental conditions, and is more environment-friendly in the use process; the preparation and production conditions are mild, the energy consumption is effectively reduced, the energy consumption is saved by 60-75%, and the production cost is effectively reduced.

Description

Special long-service-life lubricating grease for soap-free wind power bearing and preparation method thereof

Technical Field

The invention relates to the technical field of lubricating grease for wind power bearings, in particular to long-service-life special lubricating grease for a soap-free wind power bearing and a preparation method thereof.

Background

With the increasing consumption of traditional energy, the global energy supply is becoming more and more tense, and the development and utilization of new energy sources, such as wind energy, solar energy, tidal energy, biological energy and the like, are researched in various countries around the world, wherein the most mature technical conditions are based on the wind power generation technology of wind energy utilization. The principle of wind power generation is quite simple: blade rotation of windmill driven by windAnd the rotating speed is increased by the gear speed increasing mechanism, so that the generator is driven to generate electricity, and the generated electricity is transmitted to a power supply system of the power plant. Compared with the traditional energy, the wind energy has the advantages of abundant and clean reserves, relatively mature utilization technology and the like, so that wind power generation is rapidly developed in various countries of the world in recent years. In 2013, china (including Taiwan area) has newly increased installed capacity 16088.7 MW by 24.1% in the same ratio; the accumulated installed capacity 91412.89 MW is increased by 21.4 percent in the same ratio. The two data of the new installation and the accumulation installation are the first in the world, and are the United states, germany, india and the United kingdom in sequence. Wherein, the storage of the wind energy resources of Xinjiang in China is very rich, the storage of the wind energy resources of Xinjiang in China is about 20.8 percent of the total storage of the wind energy resources of China, and the position of the wind energy resources of Xinjiang in China is 2 nd position of China. According to statistics, the total area of wind areas which can be developed and utilized in Xinjiang reaches 15.45 ten thousand square kilometers, and the average effective wind energy density in the whole Xinjiang is 260 kWh/m ² The effective wind speed time is 3000 hours, the total reserve is about 9100 hundred million kWh, and the installed capacity of power generation can reach 1.82 hundred million kW.

In view of the severe conditions of energy sources and the advantages of wind power generation in China at present, china successively goes out a series of industrial policies for promoting wind power development, three departments of the issuing and modifying commission, the energy bureau and the environmental protection department jointly issue an 'enhanced atmospheric pollution control working scheme' in the energy industry, and the scheme further defines the development targets of renewable energy sources such as wind power and the like. In 2015, the installed capacity of national wind power reaches 1.0 hundred million kilowatts. In 2017, the installed capacity of wind power reaches 1.5 hundred million kilowatts. However, compared with foreign countries, the research and production of wind power generation technology in China are still relatively backward, wind power generation is still in a starting stage in terms of equipment manufacture at present, most of important raw materials, parts, lubricating materials and large-capacity wind power generation devices depend on import, and the current situation severely restricts the development of wind power industry in China. There are many scientific and technical problems in research and development and production of domestic large-scale wind power generation equipment, and the lubricating material required for realizing long-life operation under severe environmental conditions is one of the main technical difficulties which are not solved.

Lubrication is a necessary condition for normal operation of any mechanical equipment, but compared with other large-scale machines, lubrication of a transmission system of the wind power generation equipment has the following characteristics:

first, the equipment operating environment conditions are harsh. The inland wind belts in Xinjiang in China are positioned at the air openings in western mountains or in gobi open fields, the temperature changes alternately with seasons or weather conditions, the high temperature exceeds 40 ℃, the low temperature reaches minus 40 ℃, and disastrous weather such as sand dust, heavy rain, snow storm and the like are frequent, and the lubricant needs to ensure reliable protection and lubrication of all operating parts of wind power equipment in the severe environment.

Second, the equipment operating conditions are harsh. Currently, wind turbines are developed in a large scale, and megawatt wind turbines are commercialized and become a mainstream type. The blade bearing and the main bearing of the large fans are connected with blades and rotors weighing tens to tens of tons, and the large power for converting wind energy is transmitted to the gear box; the gear speed increasing system increases the rotation speed of the main shaft of 10 revolutions per minute to 1000 revolutions per minute, and transmits power to the generator to generate electricity. All the bearing gears and other moving parts of the wind power equipment are in the working condition of frequent start-stop and high-load continuous operation. It is known that lubrication failure is one of the main reasons for causing the wind turbine to fail, for example, friction pieces are scratched or glued under high load, so that the abrasion and pitting of the surfaces of bearings and gears can greatly shorten the service life of wind turbine, and the lubricant for wind turbine is required to have excellent extreme pressure performance to prevent serious lubrication failure accidents such as scratch and sintering of bearings and gears under high load, and excellent abrasion resistance and pitting resistance to prolong the service life of expensive wind turbine. In general, wind power plant lubricants are required to have high bearing capacity, outstanding wear resistance, excellent antifriction and lubrication properties, and good corrosion resistance. It should be noted that the bearing capacity of the lubricant often contradicts the corrosion resistance, and achieving a harmonious balance of the two is difficult.

Thirdly, lubrication and maintenance of wind power equipment are difficult. The wind power plant is usually arranged in areas with little smoke such as gobi open fields, mountain areas and the like, so that the traffic is inconvenient; the wind turbine generator is usually fixed on a tower base with the height of tens to 100 meters, and can be imagined: in the barren field and in the case of a strong wind whistle, it is difficult and inconvenient to perform lubrication maintenance such as oil change, grease adding and the like for a wind turbine generator set which is several tens of meters away from the ground, and meanwhile, besides the replacement of accidentally damaged components, the lubrication maintenance and the consumption of the lubricant are main operation costs of wind power generation, which require that the lubricant of wind power equipment have a longer service life so as to prolong the oil change and grease change period as much as possible, and the same-service-life lubrication is preferably realized.

At present, the traditional bearing grease is lithium-based grease, the temperature is required to be programmed in the preparation process, meanwhile, the production conditions such as pressure, temperature and the like in the reaction process are required to be controlled, the equipment requirement is higher, meanwhile, more energy is required to be consumed in the production process, and the used metallic lithium and alkaline raw materials can pollute the environment if not treated well. At present, large-scale wind power equipment in Xinjiang mainly depends on import, and the wind power equipment lubricant is completely monopoly of foreign lubricating oil companies. Meanwhile, the environmental conditions of the wind power plant in the western region, particularly the environmental conditions of the Xinjiang inland wind band with abundant wind energy and convenient development are very severe, the alternating range of the environmental temperature is large, sand dust is frequent, and foreign lubrication products are not designed to take the environmental characteristics of the wind power plant in the Xinjiang region into consideration, so that various wind power equipment faults caused by poor lubrication often occur.

Disclosure of Invention

The invention provides a long-life special lubricating grease for a soap-free wind power bearing and a preparation method thereof, which overcome the defects of the prior art, and can effectively solve the problems that the traditional bearing lubricating grease has strict production conditions, high equipment requirements, high energy consumption and easy environmental pollution, and the imported bearing lubricating grease is expensive and frequently causes wind power equipment faults due to inapplicability to harsh running environment conditions and working conditions of a Xinjiang wind power plant.

One of the technical schemes of the invention is realized by the following measures: the long-life special lubricating grease for the soap-free wind power bearing comprises, by weight, 10-25% of a thickening agent, 0.5-6% of an extreme pressure antiwear agent, 0.3-3% of an antioxidant, 0.3-3% of an anti-corrosion antirust agent and the balance of base oil.

The following are further optimizations and/or improvements to one of the above-described inventive solutions:

the base oil is one or more of total synthetic poly alpha olefin, silicone oil, ester oil and polyether, wherein the viscosity of the base oil at 40deg.C is 50mm ² /s to 400mm ² /s。

The thickener is one or more of inorganic clay, diatomite, cellulose ether, synthetic polymer, natural polymer and derivatives thereof; or/and the extreme pressure antiwear agent is more than one of vulcanized grease, phosphate, dithiophosphoric acid metal salt, vulcanized olefin and nitride; or/and, the antioxidant is more than one of tetrapentaerythritol ester, shielding phenols and phenol ammonia; or/and, the corrosion and rust inhibitor is one or more of thiadiazole derivative, petroleum sulfonate, heavy alkylbenzenesulfonate, synthetic sulfonate, zinc naphthenate, dinonyl naphthalene sulfonate barium salt, benzotriazole, oxidized petrolatum barium soap, lanolin magnesium soap and castor ester potassium.

The long-life special lubricating grease for the soap-free wind power bearing is prepared by the following method: firstly mixing a thickening agent and base oil together to obtain a mixture I, uniformly stirring the mixture I at the temperature of 80-120 ℃, and then cooling to 40-70 ℃; and secondly, adding the required extreme pressure antiwear agent, antioxidant and corrosion and rust inhibitor into the mixture I to obtain a mixture II, and uniformly stirring the mixture II and homogenizing to obtain the special long-service-life lubricating grease for the soap-free wind power bearing.

In the first step, the mixture I is stirred for 30 to 120 minutes at a temperature of 80 to 120 ℃; or/and, in the second step, the mixture II is stirred for 30 to 60 minutes and then homogenized.

The second technical scheme of the invention is realized by the following measures: the preparation method of the long-service-life special lubricating grease for the soap-free wind power bearing comprises the following steps: firstly, preparing raw materials in percentage by weight: 10 to 25 percent of thickening agent, 0.5 to 6 percent of extreme pressure antiwear agent, 0.3 to 3 percent of antioxidant, 0.3 to 3 percent of corrosion and rust inhibitor and the balance of base oil; secondly, mixing the thickening agent and the base oil together to obtain a mixture I, uniformly stirring the mixture I at the temperature of 80-120 ℃, and then cooling to 40-70 ℃; and thirdly, adding the required extreme pressure antiwear agent, antioxidant and corrosion and rust inhibitor into the mixture I to obtain a mixture II, and uniformly stirring the mixture II and homogenizing to obtain the special long-service-life lubricating grease for the soap-free wind power bearing.

The following is a further optimization and/or improvement of the second technical scheme of the invention:

In the second step, the mixture I is stirred for 30 to 120 minutes at a temperature of 80 to 120 ℃; or/and, in the third step, the mixture II is stirred for 30 to 60 minutes and then homogenized.

The special lubricating grease for the wind power bearing, provided by the invention, has excellent adhesion performance, extreme pressure wear resistance, oxidation resistance, excellent corrosion resistance, better flow characteristic and better lubricity, can adapt to extremely severe environmental conditions, and is more environment-friendly in the use process; the preparation method has mild production conditions, effectively reduces energy consumption, can save 60-75% of energy consumption, has low equipment requirements, and can effectively reduce production cost.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention. The various chemical reagents and chemical supplies mentioned in the invention are all commonly known and used in the prior art unless specified otherwise; the percentages in the invention are mass percentages unless specified otherwise; if not specified, the water in the invention is tap water or purified water; the solutions in the invention are aqueous solutions in which the solvent is water unless otherwise specified, for example, the hydrochloric acid solution is hydrochloric acid aqueous solution; the normal temperature in the present invention generally means a temperature of 15℃to 25℃and is generally defined as 25 ℃.

The invention is further described below with reference to examples:

the long-life special lubricating grease for the soap-free wind power bearing comprises, by weight, 10-25% of a thickening agent, 0.5-6% of an extreme pressure antiwear agent, 0.3-3% of an antioxidant, 0.3-3% of an anti-corrosion antirust agent and the balance of base oil. The raw materials of the invention are cheap, and the production cost can be effectively reduced; the special lubricating grease for the bearing, provided by the invention, meets the long-term operation requirement of the wind generating set, has excellent adhesion performance, extreme pressure wear resistance, oxidation resistance and excellent corrosion resistance, and can adapt to extremely severe environmental conditions.

The long-life special lubricating grease for the soap-free wind power bearing comprises, by weight, 10% or 25% of a thickening agent, 0.5% or 6% of an extreme pressure antiwear agent, 0.3% or 3% of an antioxidant, 0.3% or 3% of an anti-corrosion antirust agent and the balance of base oil.

Example 3, as an optimization of the above examples, the base oil is one or more of fully synthetic polyalphaolefins, silicone oils, ester oils and polyethers, wherein the viscosity of the base oil at 40℃is 50mm ² /s to 400mm ² And/s. The base oil in this example was selected for its better kinematic viscosity, better flow characteristics and better lubricity.

Example 4 as an optimization of the above examples, the thickener is one or more of inorganic clay, diatomaceous earth, cellulose ether, synthetic polymer, natural polymer and derivatives thereof. The thickener selected in the embodiment of the invention has no metal soap salt substance, and is more environment-friendly in the use process.

Example 5 as an optimization of the above example, the extreme pressure antiwear agent is one or more of sulfurized fats and oils, phosphoric acid esters, metal dithiophosphates, sulfurized olefins, and nitrides.

Example 6, as an optimization of the above example, the antioxidant is one or more of tetrapentaerythritol esters, shielding phenols, and phenol amines.

Example 7, the anticorrosive and antirust agent is one or more of thiadiazole derivative, petroleum sulfonate, heavy alkylbenzenesulfonate, synthetic sulfonate, zinc naphthenate, barium dinonylnaphthalene sulfonate, benzotriazole, oxidized petrolatum barium soap, lanolin magnesium soap and castor ester potassium. Although the corrosion inhibitor may contain soap substances, the addition amount of the corrosion inhibitor to the long-life special grease for a non-soap-based wind power bearing is small, and the negative effect of the soap substances is negligible with respect to the overall effect.

Example 8 as an optimization of the above example, the long-life special grease for a soap-free wind power bearing was obtained as follows: firstly, mixing a thickening agent and base oil to obtain a mixture I, uniformly stirring the mixture I at 80-120 ℃, and then cooling to 40-70 ℃; and secondly, adding the required extreme pressure antiwear agent, antioxidant and corrosion and rust inhibitor into the mixture I to obtain a mixture II, and uniformly stirring the mixture II and homogenizing to obtain the special long-service-life lubricating grease for the soap-free wind power bearing. The preparation method of the invention does not need to raise temperature in the production process and can be operated in normal pressure equipment, unlike the prior art which needs to adopt special equipment with pressure for production, therefore, the preparation method of the invention has mild production conditions, does not need to input excessive energy sources, effectively reduces energy consumption, can save 60 to 75 percent of energy consumption, has low equipment requirements, and can effectively reduce production cost from the aspect of production.

Example 9, as an optimization of example 8 above, in a first step, mixture i is stirred at a temperature of 80 ℃ to 120 ℃ for 30 minutes to 120 minutes; or/and, in the second step, the mixture II is stirred for 30 to 60 minutes and then homogenized.

Index detection data of the long-life special grease for the soap-free wind power bearing, obtained according to the above-described present embodiment of the invention, are shown in table 1.

Example 10 as optimization of the above example, the raw materials of the long-life special grease for the soap-free wind power bearing comprise, by weight, 16% of a thickening agent, 5.8% of an extreme pressure antiwear agent, 2.2% of an antioxidant, 1.1% of an anti-corrosion antirust agent and the balance of base oil. Index detection data of the long-life special grease for the soap-free wind power bearing obtained according to the present example are shown in table 1.

Example 11 as an optimization of the above example, the raw materials of the long-life special grease for the soap-free wind power bearing comprise, by weight, 18% of a thickening agent, 5.0% of an extreme pressure antiwear agent, 2.8% of an antioxidant, 2.0% of an anti-corrosion antirust agent and the balance of base oil. Index detection data of the long-life special grease for the soap-free wind power bearing obtained according to the present example are shown in table 1.

Example 12 as optimization of the above example, the raw materials of the long-life special grease for the soap-free wind power bearing comprise, by weight, 20% of a thickening agent, 5.5% of an extreme pressure antiwear agent, 2.5% of an antioxidant, 2.5% of an anti-corrosion antirust agent and the balance of base oil. Index detection data of the long-life special grease for the soap-free wind power bearing obtained according to the present example are shown in table 1.

Example 13 as an optimization of the above example, the raw materials of the long-life special grease for the soap-free wind power bearing comprise 22% of thickening agent, 4.8% of extreme pressure antiwear agent, 2.8% of antioxidant, 1.5% of corrosion and rust inhibitor and the balance of base oil in percentage by weight. Index detection data of the long-life special grease for the soap-free wind power bearing obtained according to the present example are shown in table 1.

Example 14 as an optimization of the above example, the raw materials of the long-life special grease for the soap-free wind power bearing comprise, by weight, 24% of a thickening agent, 4.8% of an extreme pressure antiwear agent, 2.2% of an antioxidant, 1.1% of an anti-corrosion antirust agent and the balance of base oil. Index detection data of the long-life special grease for the soap-free wind power bearing obtained according to the present example are shown in table 1.

Example 15 as an optimization of the above example, the raw materials of the long-life special grease for the soap-free wind power bearing comprise, by weight, 20% of a thickening agent, 5.2% of an extreme pressure antiwear agent, 2.5% of an antioxidant, 2.0% of an anti-corrosion antirust agent and the balance of base oil. Index detection data of the long-life special grease for the soap-free wind power bearing obtained according to the present example are shown in table 1.

As can be seen from the data in table 1: the special long-service-life lubricating grease for the soap-free wind power bearing can adapt to extremely severe environmental conditions through the highest use temperature and the lowest use temperature; according to the long-life special lubricating grease for the soap-free wind power bearing, which is obtained according to the embodiment of the invention, compared with the lubricating grease for the wind power bearing in the prior art, the long-life special lubricating grease for the soap-free wind power bearing, which is obtained according to the embodiment of the invention, has better viscosity index, and further shows that the long-life special lubricating grease for the soap-free wind power bearing, which is obtained according to the embodiment of the invention, has better characteristic of the long-life special lubricating grease for the soap-free wind power bearing, which is obtained according to the embodiment of the invention; as can be seen from the data of extending the penetration of the working cone, compared with the special long-service-life lubricating grease for the wind power bearing without soap base in the prior art, the special long-service-life lubricating grease for the wind power bearing without soap base has smaller consistency, better lubricating performance and better adhesive performance; according to the oil distribution amount of the steel mesh, compared with the lubricating grease for the wind power bearing in the prior art, the lubricating grease for the soap-free wind power bearing has the advantages that the temperature can be born higher, and the colloid stability is better; according to the evaporation quantity, the evaporation loss ratio of the grease is lower, which indicates that the long-service-life special grease for the soap-free wind power bearing has small evaporation loss and better practical application effect; according to the evaporation capacity, the water spray loss is smaller, so that the long-service-life special lubricating grease for the soap-free wind power bearing has better resistance to water spray compared with the lubricating grease for the wind power bearing in the prior art; according to four-ball experiments and oxidation stability data, the special long-life lubricating grease for the soap-free wind power bearing is better in wear resistance, compression resistance and oxidation resistance and longer in service life than the lubricating grease for the wind power bearing in the prior art.

The method can effectively solve the problems that the traditional bearing lubricating grease has strict production conditions, high requirements on equipment, high energy consumption and easy environmental pollution, the imported bearing lubricating grease is expensive, and wind power equipment faults frequently occur because the imported bearing lubricating grease is not suitable for severe running environment conditions and working conditions of a Xinjiang wind power plant.

The special lubricating grease for the bearing, provided by the invention, meets the long-term operation of the wind generating set, has excellent adhesion performance, extreme pressure wear resistance, oxidation resistance, excellent corrosion resistance, better flow characteristic and better lubricity, can adapt to extremely severe environmental conditions, and is more environment-friendly in the use process; the preparation method has mild production conditions, effectively reduces energy consumption, can save 60-75% of energy consumption, has low equipment requirements, and can effectively reduce production cost.

The technical characteristics form the embodiment of the invention, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.

Claims

1. A special long-life lubricating grease for a soap-free wind power bearing is characterized in that: the raw materials comprise 16 to 25 percent of thickening agent, 4.8 to 6 percent of extreme pressure antiwear agent, 2.2 to 3 percent of antioxidant, 1.1 to 3 percent of corrosion and rust inhibitor and the balance of base oil in percentage by weight; the base oil is one or more of total synthetic poly alpha olefin, silicone oil, ester oil and polyether, wherein the base oil is at the temperature ofViscosity at 40℃is 225mm ² /s to 280mm ² S; the thickener is one or more metal-free soap salt substances selected from inorganic clay, diatomite, cellulose ether, synthetic polymer, natural polymer and derivatives thereof; the extreme pressure antiwear agent is more than one of vulcanized grease, phosphate, vulcanized olefin and nitride; the antioxidant is more than one of tetrapentaerythritol ester, shielding phenols and phenol ammonia; the corrosion-resistant rust inhibitor is more than one of zinc naphthenate, oxidized petrolatum barium soap and ricinoleic acid potassium; the long-life special lubricating grease for the soap-free wind power bearing is prepared by the following steps: firstly, mixing a thickening agent and base oil together to obtain a mixture I, and then uniformly stirring the mixture I at the temperature of 80-120 ℃ and then cooling to 40-70 ℃; secondly, adding the required extreme pressure antiwear agent, antioxidant and corrosion and rust inhibitor into the mixture I to obtain a mixture II, uniformly stirring the mixture II, and homogenizing to obtain the special long-service-life lubricating grease for the soap-free wind power bearing; in the first step, the mixture I is stirred at a temperature of 80 ℃ to 120 ℃ for 30 minutes to 120 minutes; in the second step, the mixture II is homogenized after stirring for 30min to 60 min.

2. A preparation method of long-life special lubricating grease for a soap-free wind power bearing is characterized by comprising the following steps of: the method comprises the following steps of: firstly, preparing raw materials in percentage by weight: 16 to 25 percent of thickening agent, 4.8 to 6 percent of extreme pressure antiwear agent, 2.2 to 3 percent of antioxidant, 1.1 to 3 percent of corrosion and rust inhibitor and the balance of base oil; secondly, mixing the thickening agent and the base oil together to obtain a mixture I, uniformly stirring the mixture I at the temperature of 80-120 ℃, and then cooling to 40-70 ℃; thirdly, adding the required extreme pressure antiwear agent, antioxidant and corrosion and rust inhibitor into the mixture I to obtain a mixture II, uniformly stirring the mixture II, and homogenizing to obtain the special long-service-life lubricating grease for the soap-free wind power bearing; the base oil is one or more of total synthetic poly-a-olefin, silicone oil, lipid oil and polyether, wherein the viscosity of the base oil at 40deg.C is 225mm ² /s to 280mm ² S; the thickening agent is inorganic adhesiveSoil, diatomite, cellulose ether, synthetic polymer, natural polymer and one or more metal-free soap salt substances of derivatives thereof; the extreme pressure antiwear agent is more than one of vulcanized grease, phosphate, vulcanized olefin and nitride; the antioxidant is more than one of tetrapentaerythritol ester, shielding phenols and phenol ammonia; the corrosion-resistant rust inhibitor is more than one of zinc naphthenate, oxidized petrolatum barium soap and ricinoleic acid potassium; in the second step, the mixture I is stirred at a temperature of 80 ℃ to 120 ℃ for 30 minutes to 120 minutes; in the third step, the mixture II is homogenized after stirring for 30min to 60 min.