CN112852531A

CN112852531A - Aviation lubricating oil and preparation method thereof

Info

Publication number: CN112852531A
Application number: CN202110129762.1A
Authority: CN
Inventors: 叶韦鹏
Original assignee: Zhejiang Huakai Technology Co ltd
Current assignee: Zhejiang Huakai Technology Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-05-28

Abstract

The application provides aviation lubricating oil and a preparation method thereof, wherein A is added into a gathering and mixing part through a base oil tank₁Preparing base oil; adding A to the defoaming mixing part through a base oil tank₂The method comprises the following steps of mixing base oil, polyether modified silicone oil composite defoaming agent B, through a defoaming agent tank, into a defoaming mixing part, mixing the base oil and the polyether modified silicone oil composite defoaming agent for a first time at 55-75 ℃ through a defoaming mixing part to obtain a first product, and then adding the first product into a summary mixing partAnd (7) combining the parts. And mixing the base oil and the first product at 50-70 ℃ for a second time through a gathering and mixing part to obtain a second product. By adopting the method to prepare the aviation lubricating oil, the uniform mixing degree of the polyether modified silicone oil composite defoaming agent in the base oil (namely the dispersion degree of the defoaming agent in the base oil) can be ensured, so that the foam in the aviation lubricating oil can be eliminated more easily, and the defoaming effect of the aviation lubricating oil can be improved. In addition, the preparation efficiency of the aviation lubricating oil can be greatly improved by the method.

Description

Aviation lubricating oil and preparation method thereof

Technical Field

The application relates to the field of lubricating oil, in particular to aviation lubricating oil and a preparation method thereof.

Background

In modern lubricating oils, whether engine lubricating oils, industrial lubricating oils or transmission lubricating oils contain a certain amount of additives, the oils tend to foam during the use due to their transportation or the violent vibration of the oil and machine parts, and the formation of stable foams has extremely adverse consequences. For example, when lubricating oil is used, it is often necessary to lubricate and cool a workpiece that is operated at a high temperature and a high speed. When the flow rate of the lubricating oil is high, the stirring is violent, and the temperature and pressure change is large, a large amount of foam is generated.

When the lubricating oil generates foams during use and is difficult to eliminate in time, the following hazards are generally caused:

1. the lubricating oil contains a large amount of air, so that the lubricating and cooling effects of the lubricating oil are influenced, the working efficiency of machinery is reduced, and the service life of equipment is shortened;

2. the lubricating oil contains a large amount of bubbles, so that the volume of the lubricating oil is increased, the lubricating oil is easy to overflow from an oil tank, and unsafe factors such as oil loss or ignition are caused;

3. the lubricating oil contains bubbles, so that the compressibility of the lubricating oil is improved, oil supply of an oil pump is possibly blocked, and oil supply is difficult;

4. the lubricating foam can increase the contact area between the lubricating oil and air, accelerate the oxidative deterioration of the oil, shorten the service cycle of the oil and the like.

Therefore, aviation lubricating oil, which is a lubricating oil product requiring more severe use requirements, should have good defoaming performance, and be capable of suppressing the generation of foam, and eliminating the generated foam in a short time to ensure the normal operation of the lubricating system.

At present, two measures are generally adopted for solving the problem of oil product foaming of aviation lubricating oil, namely, the foaming performance of the oil product is improved by changing the composition structure of the lubricating oil; secondly, various defoaming methods are adopted in the system to achieve the purpose of defoaming (for example, a physical defoaming method is adopted, and a corresponding mechanism is arranged to eliminate the lubricating oil foam, for example, the pressure is changed sharply). The foam in the lubricating oil is eliminated, and the method has important practical significance for ensuring the safe operation of equipment, reducing the equipment loss and prolonging the mechanical life.

However, such a physical defoaming method is too costly and requires modification of the lubricating oil system to improve defoaming effect without affecting normal operation of the system itself, and such a method is too costly and difficult to predict. By using the chemical defoaming method, the defoaming effect of the lubricating oil can be improved in a low-cost manner. But the aviation lubricating oil is prepared by the existing chemical defoaming method, the preparation efficiency needs to be improved, and the defoaming effect still needs to be further improved.

Disclosure of Invention

An object of the embodiment of the application is to provide aviation lubricating oil and a preparation method thereof, so that the defoaming performance of the aviation lubricating oil is further improved while the preparation efficiency of the aviation lubricating oil is improved.

In order to achieve the above object, embodiments of the present application are implemented as follows:

in a first aspect, an embodiment of the present application provides a method for preparing aviation lubricating oil, where an aviation lubricating oil blending device includes a base oil tank, a defoaming agent tank, a functional agent tank, a defoaming and mixing unit, a collective mixing unit, a physical defoaming unit, a cooling unit, and a product oil tank, the method including: adding A to the collective mixing section via the base oil tank₁A base oil, wherein A₁Between 60 and 94; adding A to the defoaming mixing part through the base oil tank₂The method comprises the following steps of proportioning base oil, adding B parts of polyether modified silicone oil composite defoaming agent into a defoaming mixing part through a defoaming agent tank, mixing the base oil and the polyether modified silicone oil composite defoaming agent for a first time at 55-75 ℃ through the defoaming mixing part to obtain a first product, and adding the obtained first product into a collecting mixing part, wherein A is₂3-28 parts of the polyether modified silicone oil composite defoaming agent, and 0.02-0.10 part of the B component, wherein the components of the polyether modified silicone oil composite defoaming agent comprise polyether modified silicone oil and non-silicon type antifoaming agent T912; mixing the base oil and the first product at 50-70 ℃ for a second time period through the gathering and mixing part to obtain a second product; adding C parts of functional agent into the summarizing and mixing part through the functional agent tank, and adding the second product and the functional agent into the summarizing and mixing part through the summarizing and mixing part at 5Mixing for a third time at 0-70 ℃ to obtain a third product, wherein the functional agent comprises at least one of an antioxidant, a detergent dispersant and an extreme pressure antiwear agent, and C is 3-12; enabling the obtained third product to flow to the physical defoaming part through the summarizing and mixing part, and physically defoaming the third product for 5-10 minutes by the physical defoaming part to reduce the content of air dissolved in the third product to obtain the aviation lubricating oil; and the obtained aviation lubricating oil flows to the cooling part through the physical defoaming part, and when the aviation lubricating oil is cooled to normal temperature, the cooled aviation lubricating oil is added into the finished oil tank through the cooling part.

In the present embodiment, a is added to the collective mixing section through the base oil tank₁(between 60 and 94) parts of base oil; adding A to the defoaming mixing part through a base oil tank₂And (3-28) parts of base oil, adding B (0.02-0.10) parts of polyether modified silicone oil composite defoaming agent into a defoaming mixing part through a defoaming tank, mixing the base oil (in the defoaming mixing part) and the polyether modified silicone oil composite defoaming agent for a first time at 55-75 ℃ through the defoaming mixing part to obtain a first product, and adding the obtained first product into a summarizing mixing part. And mixing the base oil (in the gathering and mixing part) and the first product at 50-70 ℃ for a second time period through the gathering and mixing part to obtain a second product. The aviation lubricating oil prepared by the method can ensure the uniform mixing degree of the polyether modified silicone oil composite defoaming agent in the base oil (namely the dispersion degree of the defoaming agent in the base oil). The reason for generating foam in oil products is mainly as follows: various additives are added into the oil product; the oil product is oxidized to generate an oxidation product; during operation of the lubricating oil, changes in ambient temperature and pressure cause the release of air dissolved in the oil; lubricating oil containing air releases air when stirred at high speed. The formation of stable foam in the oil is mainly due to the surface active substances dissolved in the oil: the surface active molecules tend to be adsorbed on a gas-liquid interface, and a stable surface film can be formed on the surface of the bubbles, so that the surface tension of the bubbles is reduced and is difficult to eliminate. The defoaming agent is evenly mixed in the base oil,therefore, in the prepared aviation lubricating oil, the polyether modified silicone oil composite defoaming agent can be well dispersed everywhere, when bubbles are generated in the use of the aviation lubricating oil, the surface activity of the polyether modified silicone oil composite defoaming agent is large (the components of the composite defoaming agent T912 comprise a silicon defoaming agent and a non-silicon defoaming agent, the defoaming effect is good, a small amount of polyether modified silicone oil is supplemented, the defoaming effect can be further improved), the polyether modified silicone oil composite defoaming agent can be quickly adsorbed on an oil film, a new surface film is formed to change the property of the surface film of the bubbles, and the stable film cannot be formed, so that the foams in the aviation lubricating oil can be eliminated more easily, and the defoaming effect of the aviation lubricating oil is improved. In addition, in this way, the mixing (not dissolution) of the polyether modified silicone oil composite defoaming agent and the base oil can be divided into a plurality of processes, on one hand, the mixing efficiency can be improved to improve the defoaming performance of the prepared aviation lubricating oil, and on the other hand, multithreading cooperation is facilitated (for example, one defoaming mixing part can supply a plurality of different gathering mixing parts, and after a mixed first product is added into one gathering mixing part, the preparation of the first product of the other gathering mixing part can be started without waiting), so that the preparation efficiency of the aviation lubricating oil is greatly improved. Adding a C (between 3 and 12) part of functional agent into the summarizing and mixing part through a functional agent tank, and mixing the second product and the functional agent (comprising at least one of an antioxidant, a detergent dispersant and an extreme pressure antiwear agent) at 50 to 70 ℃ for a third time through the summarizing and mixing part to obtain a third product; flowing the obtained third product to a physical defoaming part through a gathering and mixing part, and physically defoaming the third product for 5-10 minutes to reduce the content of air dissolved in the third product to obtain the aviation lubricating oil; and cooling the aviation lubricating oil by the cooling part, and adding the aviation lubricating oil into the finished oil tank after the aviation lubricating oil is cooled to the normal temperature. The functional agent is added into the second product, so that the corresponding properties (such as pour point, detergency, oxidation resistance and the like) of the aviation lubricating oil can be further improved, the prepared aviation lubricating oil has more excellent properties, and the aviation lubricating oil can be suitable for corresponding working environments (such as a low-temperature starting environment, a large-span temperature difference working environment and the like).

In combination with the first aspectIn a first possible implementation manner of the first aspect, the aircraft lubricating oil blending device further includes a pour point depressant tank and a pour point depressant mixing portion, a₁Between 60 and 88, A₂Between 3 and 12 and B between 0.02 and 0.10, the method further comprising: adding A to the pour point depressing mixing section through the base oil tank₃Adding D parts of pour point depressant to the pour point depressing mixing part through the pour point depressant tank, mixing the base oil and the pour point depressant at 40-60 ℃ for a fourth time through the pour point depressing mixing part to obtain a fourth product, and adding the obtained fourth product to the collecting and mixing part, wherein A is₃5-14, and D is 0.98-1.90; correspondingly, the way of obtaining the second product is: and mixing the base oil, the first product and the fourth product at 50-70 ℃ for a second time through the gathering and mixing part to obtain the second product.

In this implementation, a is added to the pour point depressant mixing section through the base oil tank₃And (5-14) adding D (between 0.98-1.90) parts of pour point depressant to the pour point depressing mixing part through a pour point depressant tank, mixing the base oil (in the pour point depressing mixing part) and the pour point depressant at 40-60 ℃ for a fourth time through the pour point depressing mixing part to obtain a fourth product, and adding the obtained fourth product to the summarizing and mixing part so as to mix the base oil, the first product and the fourth product at 50-70 ℃ for a second time through the summarizing and mixing part to obtain a second product. The pour point depressant can be divided into two parts to be mixed in such a way, so that the pour point depressant is fully mixed with the base oil, the pour point depression effect (the pour point of the base oil) is guaranteed while the mixing efficiency is improved, and the pour point depressant can be well matched with the mixing of the defoaming agent so as to improve the preparation efficiency of the aviation lubricating oil on the whole.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the aviation lubricating oil blending device further includes a finger-sticking agent tank and a finger-sticking mixing portion, a₁Between 60 and 83, A₂3 to 5, B0.02 to 0.10, A₃Between 5 and 6, D is between 0.98 and 1.90The method further comprises: adding A to the viscous finger mixing part through the base oil tank₄Adding E parts of a finger adhesive into the finger adhesive mixing part through the finger adhesive tank, mixing the base oil and the finger adhesive at 50-70 ℃ for a fifth time through the finger adhesive mixing part to obtain a fifth product, and adding the obtained fifth product into the gathering and mixing part, wherein A is₄5-6, E is 1-11; correspondingly, the way of obtaining the second product is: and mixing the base oil, the first product, the fourth product and the fifth product at 50-70 ℃ for a second time period through the gathering and mixing part to obtain the second product.

In this implementation, a is added to the finger-stick mixing section through the base oil tank₄(between 5 and 6) parts of base oil, adding E (between 1 and 11) parts of a finger adhesive into a finger adhesive mixing part through a finger adhesive tank, mixing the base oil (in the finger adhesive mixing part) and the finger adhesive for a fifth time at 50 to 70 ℃ through the finger adhesive mixing part to obtain a fifth product, and adding the obtained fifth product into a gathering mixing part; then the base oil (in the summary mixing section), the first product, the fourth product and the fifth product are mixed by the summary mixing section at 50-70 ℃ for a second period of time to obtain a second product. The mode can divide the finger-sticking agent into two parts to be mixed, so that the finger-sticking agent and the base oil can be mixed conveniently and fully, the improvement effect of the viscosity index (the viscosity-temperature performance of the base oil is improved, and the base oil meets the requirements of wide temperature change range and stable viscosity) is ensured while the mixing efficiency is improved, and the mode can be well matched with the mixing of the defoaming agent so as to improve the preparation efficiency of the aviation lubricating oil on the whole.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the functional agent includes 2 parts of an antioxidant, 3 parts of a detergent dispersant, and 4 parts of an extreme pressure antiwear agent.

In the implementation mode, the functional agent comprises 2 parts of antioxidant, 3 parts of detergent dispersant and 4 parts of extreme pressure antiwear additive, so that the oxidation of the prepared aviation lubricating oil can be well delayed, and the service life of the aviation lubricating oil is prolonged. The detergent dispersant can neutralize organic acid and inorganic acid generated by oxidation of aviation lubricating oil and prevent further condensation of the organic acid and the inorganic acid, so that a paint film is reduced, and meanwhile, corrosion of parts caused by acidic substances can be prevented; meanwhile, the detergent dispersant is some surfactants, which can increase and dissolve solid or liquid substances which are not dissolved in oil into the center of a micelle formed by gathering 5-20 surfactant molecules, and during the use process, the detergent dispersant solubilizes oxygen-containing compounds containing hydroxyl, carbonyl and carboxyl, nitro-containing compounds, water and the like into the micelle to form colloid, thereby preventing further oxidation and condensation and reducing the formation and aggregation of harmful deposits on engine parts; the paint can adsorb the generated carbon deposit, paint film and other small solid particles to form a colloidal solution state, and disperse the colloidal solution state in oil, so that the substances are prevented from further agglomerating into large particles to be adhered to a machine member or depositing into oil sludge, and the paint film and the carbon deposit adsorbed on the surface of a part can be washed and dispersed in the oil, so that the engine and the metal surface are kept clean. The extreme pressure antiwear agent can well improve the extrusion antiwear property of the aviation lubricating oil and prevent sintering.

In combination with the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the base oil is a modified silicone oil or a fluoroether triazine, a₁Is 72, A₂5, B is 0.10, the mixing temperature of the defoaming mixing part is controlled at 65 ℃, the first time length is 15 minutes, A₃5, the pour point depressant is polymethacrylate, D is 1.50, the mixing temperature of the pour point depressant mixing part is controlled to be 55 ℃, the fourth time is 15 minutes, A₄5, the finger-gluing agent is ethylene-propylene copolymer, E is 2.40, the mixing temperature of the finger-gluing mixing part is controlled at 60 ℃, the fifth time is 30 minutes, and the second product is obtained by the following method: the defoaming mixing part adds the first product into the collecting and mixing part, and then the A is added into the product through the collecting and mixing part₁A base oil and (A)₂+ B) mixing the first product for five minutes, and passing through the collecting and mixing part after the pour point depressing and mixing part adds the fourth product into the collecting and mixing partA is to be₁Part of base oil, (A)₂+ B) parts of said first product and (A)₃+ D) mixing the fourth product for 10 minutes, adding the fifth product into the gathering and mixing part by the finger-sticking mixing part, and then adding the A into the gathering and mixing part by the gathering and mixing part₁Part of base oil, (A)₂+ B) parts of said first product, (A)₃+ D) parts of said fourth product and (A)₄+ E) portions of said fifth product were mixed together for 30 minutes to obtain said second product.

In this embodiment, the base oil is a modified silicone oil or a fluoroether triazine, A₁Is 72, A₂5, B0.10, the mixing temperature of the defoaming mixing part is controlled at 65 ℃, the first time length is 15 minutes, A₃5, the pour point depressant is polymethacrylate, D is 1.50, the mixing temperature of the pour point depressing mixing part is controlled at 55 ℃, the fourth time length is 15 minutes, A₄5, the finger-sticking agent is ethylene-propylene copolymer, E is 2.40, the mixing temperature of the finger-sticking mixing part is controlled at 60 ℃, and the fifth time period is 30 minutes. The preparation process parameters of the aviation lubricating oil can well ensure the quality and the performance of the prepared aviation lubricating oil, and can well control the cost. And the mixing duration parameter (for example, the first duration is 15 minutes, the fourth duration is 15 minutes, the fifth duration is 30 minutes), not only can the quality of the aviation lubricating oil be well considered, but also the preparation efficiency of the aviation lubricating oil can be considered, and the low-intermittent preparation of the aviation lubricating oil can be realized by using less equipment, so that the preparation efficiency of the aviation lubricating oil is greatly improved. Adding the first product into the gathering and mixing part through the defoaming and mixing part, and adding the first product into the gathering and mixing part through the gathering and mixing part₁A base oil and (A)₂+ B) mixing the first product for five minutes, adding the fourth product into the collecting and mixing part in the pour point depressing and mixing part, and then adding the product A into the collecting and mixing part in the collecting and mixing part₁Part of base oil, (A)₂+ B) parts of the first product and (A)₃+ D) mixing the fourth product for 10 minutes, adding the fifth product into the gathering and mixing part by the finger-sticking mixing part, and then adding the A into the gathering and mixing part by the gathering and mixing part₁Part of base oil, (A)₂+ B) parts of the first product, (A)₃+ D) parts of a fourth product and (A)₄+ E) portions of the fifth product were mixed together for 30 minutes to obtain the second product. Thus, the device is provided withThe method can not only consider the adding sequence among the defoaming agent, the pour point depressant and the finger-sticking agent, but also can consider the temperature parameter difference between the respective mixing and the co-mixing so as to obtain the best aviation lubricating oil blending effect. Moreover, the mixing time length distribution can enable 1 defoaming mixing part, 1 pour point depressing mixing part and 2 sticky finger mixing parts to be matched with 4 summary mixing parts for non-intermittent preparation, and the preparation efficiency of the aviation lubricating oil is improved by 4 times (the intermittence possibly involved in the preparation process, such as the time required by oil drainage, is not considered). Therefore, the preparation efficiency of the aviation lubricating oil can be greatly improved.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the base oil is synthetic oil PAO, a₁Is 80, A₂12, 0.10 of B, controlling the mixing temperature of the defoaming mixing part at 65 ℃, controlling the first time length to be 20 minutes, controlling the second time length to be 40 minutes, controlling the functional agent to comprise 1.50 parts of antioxidant, 2.90 parts of detergent dispersant and 3 parts of extreme pressure antiwear agent, and 0.50 part of alkyl polyamide, and controlling the third time length to be 30 minutes.

In the implementation mode, the base oil is synthetic oil PAO, and the synthetic oil PAO has excellent performance and very good pour point, viscosity-temperature performance and the like, so that after the polyether modified silicone oil composite antifoaming agent is added and mixed in stages (the mixing uniformity and mixing efficiency can be improved), the additives (namely the functional agents, for example, 1.50 parts of antioxidant, 2.90 parts of detergent dispersant and 3 parts of extreme pressure antiwear agent) are added and mixed, and the aviation lubricating oil with better performance can be efficiently prepared.

With reference to the first aspect, in a sixth possible implementation manner of the first aspect, the functional agent includes 2 parts of an ashless antioxidant, 3 parts of an ashless detergent dispersant, 4 parts of an extreme pressure antiwear agent, 1 part of an anticorrosive antirust agent, and 1 part of a metal deactivator, the base oil is neopentyl polyol ester, the components of the polyether modified silicone oil composite defoamer further include polyether modified polysiloxane, a₁Is 70, A₂5, B is 0.10, the mixing temperature of the defoaming mixing part is controlled at 65 ℃, the first time length is 15 minutes, A₃Is a mixture of a water-soluble polymer and a water-soluble polymer, and is 5,the pour point depressant is polymethacrylate, D is 1.50, the mixing temperature of the pour point depressant mixing part is controlled to be 55 ℃, the fourth time is 15 minutes, A₄5, the finger-gluing agent is ethylene-propylene copolymer, E is 2.40, the mixing temperature of the finger-gluing mixing part is controlled at 60 ℃, the fifth time is 30 minutes, and the second product is obtained by the following method: the defoaming mixing part adds the first product into the collecting and mixing part, and then the A is added into the product through the collecting and mixing part₁A base oil and (A)₂+ B) mixing the first product for five minutes, and adding the product A through the collecting and mixing part after the pour point depressing and mixing part adds the fourth product into the collecting and mixing part₁Part of base oil, (A)₂+ B) parts of said first product and (A)₃+ D) mixing the fourth product for 10 minutes, adding the fifth product into the gathering and mixing part by the finger-sticking mixing part, and then adding the A into the gathering and mixing part by the gathering and mixing part₁Part of base oil, (A)₂+ B) parts of said first product, (A)₃+ D) parts of said fourth product and (A)₄+ E) portions of said fifth product were mixed together for 30 minutes to obtain said second product.

In the implementation mode, the functional agent comprises 2 parts of ashless antioxidant, 3 parts of ashless clean dispersant, 4 parts of extreme pressure antiwear agent, 1 part of anticorrosive antirust agent and 1 part of metal deactivator, the base oil is neopentyl polyol ester, and the components of the polyether modified silicone oil composite defoamer also comprise polyether modified polysiloxane A₁Is 70, A₂5, B0.10, the mixing temperature of the defoaming mixing part is controlled at 65 ℃, the first time length is 15 minutes, A₃5, the pour point depressant is polymethacrylate, D is 1.50, the mixing temperature of the pour point depressing mixing part is controlled at 55 ℃, the fourth time length is 15 minutes, A₄5, the finger-sticking agent is ethylene-propylene copolymer, E is 2.40, the mixing temperature of the finger-sticking mixing part is controlled at 60 ℃, and the fifth time period is 30 minutes. The preparation process parameters of the aviation lubricating oil can well ensure the quality and the performance of the prepared aviation lubricating oil, and can well control the cost. While the mixing duration parameter (e.g., first duration 15 minutes, fourth duration 15 minutes, fifth duration 30 minutes) may not only be well considered for aviation lubricationThe quality of lubricating oil can also compromise the preparation efficiency of aviation lubricating oil, and can realize the low intermittent type preparation of aviation lubricating oil through using less equipment to promote the preparation efficiency of aviation lubricating oil greatly. Adding the first product into the gathering and mixing part through the defoaming and mixing part, and adding the first product into the gathering and mixing part through the gathering and mixing part₁A base oil and (A)₂+ B) mixing the first product for five minutes, adding the fourth product into the collecting and mixing part in the pour point depressing and mixing part, and then adding the product A into the collecting and mixing part in the collecting and mixing part₁Part of base oil, (A)₂+ B) parts of the first product and (A)₃+ D) mixing the fourth product for 10 minutes, adding the fifth product into the gathering and mixing part by the finger-sticking mixing part, and then adding the A into the gathering and mixing part by the gathering and mixing part₁Part of base oil, (A)₂+ B) parts of the first product, (A)₃+ D) parts of a fourth product and (A)₄+ E) portions of the fifth product were mixed together for 30 minutes to obtain the second product. In this way, the best aeronautical oil blending effect can be obtained by considering the adding sequence of the defoaming agent, the pour point depressant and the finger-sticking agent and the difference between the temperature parameter during mixing and the temperature parameter during mixing. Moreover, the mixing time length distribution can enable 1 defoaming mixing part, 1 pour point depressing mixing part and 2 sticky finger mixing parts to be matched with 4 summary mixing parts for non-intermittent preparation, and the preparation efficiency of the aviation lubricating oil is improved by 4 times (the intermittence possibly involved in the preparation process, such as the time required by oil drainage, is not considered). Therefore, the preparation efficiency of the aviation lubricating oil can be greatly improved.

In a second aspect, embodiments of the present application provide an aviation lubricating oil prepared by the method for preparing an aviation lubricating oil according to the first aspect or any one of possible implementation manners of the first aspect.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic diagram of an aircraft lubricating oil blending device according to an embodiment of the present disclosure.

Fig. 2 is a flowchart of a method for preparing aviation lubricating oil according to an embodiment of the present disclosure.

Icon: 100-an aircraft lubricating oil blending device; 110-a base oil tank; 121-defoamer tank; 122-a functional agent tank; 123-pour point depressant tank; 124-a finger stick can; 131-a defoaming mixing section; 132-a summary mixing section; 133-pour point depressing mixing section; 134-mixed finger sticking part; 140-physical bubble removal section; 150-a cooling section; 160-finished oil tank.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

Referring to fig. 1, fig. 1 is a schematic view of an aircraft lubricating oil blending device 100 according to an embodiment of the present disclosure. In this embodiment, the aircraft oil blending device 100 may include: the system comprises a base oil tank 110, a defoaming agent tank 121, a pour point depressant tank 123, an adhesive agent tank 124, a functional agent tank 122, a defoaming and mixing part 131, a pour point depressing and mixing part 133, an adhesive agent mixing part 134, a collective mixing part 132, a physical defoaming part 140, a cooling part 150 and a product oil tank 160. In other implementations, the aircraft oil blending device 100 may also not include the pour point depressant tank 123, the finger adhesive tank 124, the pour point depressant mixing section 133, the finger adhesive mixing section 134, or may also include other additive tanks, corresponding mixing sections, and the like, which are not limited herein.

Illustratively, the base oil tank 110 is used for containing base oil, and the base oil tank 110 is respectively communicated with the defoaming mixing portion 131, the pour point depressing mixing portion 133, the sticking mixing portion 134 and the collecting mixing portion 132 and is used for providing the base oil for the defoaming mixing portion 131, the pour point depressing mixing portion 133, the sticking mixing portion 134 and the collecting mixing portion 132. The pipes of the base oil tank 110 communicating with the defoaming mixing portion 131, the pour point depressing mixing portion 133, the sticking finger mixing portion 134, the collective mixing portion 132, and the like may be provided with valves and flow meters so as to realize flexible supply of the base oil and control the supply amount of the base oil.

Illustratively, the defoamer tank 121 may be used to hold a defoamer, and the defoamer tank 121 may communicate with the defoaming mixing portion 131 to provide the defoaming agent to the defoaming mixing portion 131. Of course, the pipeline of the defoaming agent tank 121 communicating with the defoaming mixing unit 131 may also be provided with corresponding valves and flow meters, so as to achieve flexible supply of the defoaming agent and control the supply amount of the defoaming agent.

Similarly, the pour point depressant tank 123 may be used to hold a pour point depressant, and the pour point depressant tank 123 may be in communication with the pour point depressant mixing portion 133 to provide a pour point depressant for the pour point depressant mixing portion 133. The pipeline of the pour point depressant tank 123 communicated with the pour point depressant mixing part 133 can be provided with corresponding valves and flow meters so as to realize flexible supply of pour point depressants and control the supply amount of the pour point depressants.

And the finger adhesive tank 124 is used to contain finger adhesive (viscosity index improver), and the finger adhesive tank 124 may communicate with the finger adhesive mixing portion 134 to supply the finger adhesive to the finger adhesive mixing portion 134. The pipeline of the finger-sticking agent tank 124 communicated with the finger-sticking agent mixing part 134 can also be provided with a corresponding valve and a flow meter so as to realize the flexible supply of the finger-sticking agent and control the supply amount of the finger-sticking agent.

As for the functional agent tank 122, since there may be a plurality of functional agents, some functional agents may be stored together, but some functional agents are not convenient to be stored together, and in order to better control the supply amount of the functional agents, the functional agent tank 122 herein may be regarded as a generic term of different functional agent storage containers, and in practice, there may be a plurality of different containers (such as a detergent tank, a dispersant tank, an antioxidant tank, an extrusion antiwear agent tank, etc.), and is not limited herein. The functional agent tank 122 may be in communication with the collective mixing section 132 to add a functional agent into the collective mixing section 132.

Illustratively, the aggregate mixing section 132 may be in communication with the physical bubble removal section 140 to input the mixed product into the physical bubble removal section 140.

In the present embodiment, the plurality of mixing sections (for example, the defoaming mixing section 131, the pour point depressing mixing section 133, the viscous finger mixing section 134, the collective mixing section 132, and the like) may be appropriately selected according to need, for example, a pulse pneumatic mixing method, a mechanical mixing method, a pump circulation mixing method, and the like, and are not limited herein. Of course, in order to achieve both cost and mixing efficiency, the collection mixing section 132 may be a pulse pneumatic mixing system, and the pour point depressing mixing section 133, the viscous finger mixing section 134, the collection mixing section 132, and the like may be a mechanical mixing system or a pump circulation mixing system.

Illustratively, the physical bubble removal portion 140 is configured to physically remove bubbles from the conditioned aviation lubricating oil to reduce the dissolved air content of the conditioned aviation lubricating oil. The physical defoaming unit 140 may be used for defoaming by physical radiation irradiation, or may be used for ultrasonic defoaming, mechanical defoaming, filtration defoaming, etc., and is not limited herein.

And physical defoaming portion 140 may be in communication with cooling portion 150 so as to convey the defoamed aircraft lubricating oil to cooling portion 150 for cooling, and after the aircraft lubricating oil is cooled to normal temperature, cooling portion 150 may further convey the cooled aircraft lubricating oil to product oil tank 160 for storage.

For example, the aviation oil blending device 100 may further be provided with a main control module (e.g., a control terminal), and the main control module may be communicatively connected to each of the other components (e.g., the base oil tank 110, the functional agent tank 122, the collective mixing portion 132, the physical defoaming portion 140, and the like) in the aviation oil blending device 100, so as to achieve intelligent control over the entire aviation oil blending device 100 (e.g., opening and closing of a valve is controlled to provide base oil, functional agents, and the like; operation of the mixing portion is controlled to achieve blending of products; operation of the physical defoaming portion 140 is controlled to achieve physical defoaming of products, and the like), thereby achieving intelligent preparation of aviation oil, which is not limited herein.

In addition, since the mixing time periods of different mixing sections are different, in order to further improve the operating efficiency of the aircraft lubricating oil blending device 100, a plurality of mixing sections of the same type may be provided to cooperate with mixing sections of another different type, for example, 4 summarizing mixing sections 132 may cooperate with 2 sticking finger mixing sections 134, and 2 sticking finger mixing sections 134 may cooperate with 1 defoaming mixing section 131 and 1 pour point depressing mixing section 133 (it may be understood that there may be a time interval between 1 defoaming mixing section 131 and 1 pour point depressing mixing section 133, and after the mixing of 1 defoaming mixing section 131 is completed, the mixed product is added to one summarizing mixing section 132, that is, the mixing of the products required by another summarizing mixing section 132 is started). The specific cooperation mode can be that a defoaming mixing portion 131 communicates with 4 mixing portion 132 that gathers respectively, and every passageway has a valve to control opening or closing of this passageway, thereby can realize that a defoaming mixing portion 131 provides the product for 4 mixing portion 132 that gathers, can the maximize of aeronautical oil blending device 100 operating efficiency like this, thereby the preparation efficiency of aeronautical oil is showing to promote with the mode of low cost. Of course, the description is only exemplary, and the cooperation between other mixing parts may be performed in this way, and the present application should not be considered as limited herein.

The embodiment of the application also provides a preparation method of the aviation lubricating oil, which can be realized by the aviation lubricating oil blending device 100. Referring to fig. 2, fig. 2 is a flowchart of a method for preparing aviation lubricant according to an embodiment of the present disclosure.

The aviation lubricant in the present embodiment is an aviation turbine engine lubricant, but should not be construed as limiting the present application. In other possible implementations, the aircraft oil blending device 100 may also be used to prepare other types of aircraft oils, such as aircraft hydraulic oil, and the like, and thus, is not limited herein.

In this embodiment, the preparation method of the aviation lubricating oil may include the following steps: adding base oil, adding and mixing defoaming agent, summarizing and mixing, adding and mixing functional agent, physically defoaming, cooling product and canning.

Adding base oil: addition of A to the collective mixing section 132 via the base oil tank 110₁A base oil, wherein A₁Between 60 and 94.

Adding and mixing a defoaming agent: a is added to the defoaming mixing portion 131 through the base oil tank 110₂Base oil is added, and defoaming agent is addedAdding B parts of polyether modified silicone oil composite defoaming agent into the defoaming mixing part 131 through the tank 121, mixing the base oil and the polyether modified silicone oil composite defoaming agent at 55-75 ℃ for a first time through the defoaming mixing part 131 to obtain a first product, and adding the obtained first product into the summarizing mixing part 132, wherein A is₂3 to 28, B is 0.02 to 0.10.

Summarizing and mixing: and mixing the base oil and the first product at 50-70 ℃ for a second time period by the gathering and mixing part 132 to obtain a second product.

Adding and mixing functional agents: and adding C parts of functional agent into the summarizing and mixing part 132 through the functional agent tank 122, and mixing the second product and the functional agent at 50-70 ℃ for a third time through the summarizing and mixing part 132 to obtain a third product, wherein the functional agent comprises at least one of an antioxidant, a detergent dispersant and an extreme pressure antiwear agent, and C is 3-12.

Physical defoaming: through gathering mixing portion 132 and flowing towards physics defoaming unit 140 with the third product that obtains, physics defoaming unit 140 carries out physics defoaming 5 ~ 10 minutes to the third product, reduces the air content of dissolving in the third product, obtains aviation lubricating oil.

Cooling and canning the product: the obtained aviation lubricating oil flows to the cooling part 150 through the physical defoaming part 140, and when the aviation lubricating oil is cooled to normal temperature, the cooled aviation lubricating oil is added into the product oil tank 160 through the cooling part 150.

Addition of A to the collective mixing section 132 via the base oil tank 110₁(between 60 and 94) parts of base oil; a is added to the defoaming mixing portion 131 through the base oil tank 110₂(between 3 and 28) parts of base oil, adding B (between 0.02 and 0.10) parts of polyether modified silicone oil composite defoaming agent into a defoaming mixing part 131 through a defoaming tank 121, mixing the base oil (in the defoaming mixing part 131) and the polyether modified silicone oil composite defoaming agent at 55 to 75 ℃ for a first time through the defoaming mixing part 131 to obtain a first product, and adding the obtained first product into a summarizing mixing part 132. And mixing the base oil (in the gathering mixing part 132) and the first product at 50-70 ℃ for a second time period through the gathering mixing part 132 to obtain a second product. By such a methodThe aviation lubricating oil prepared by the method can ensure the uniform mixing degree of the polyether modified silicone oil composite defoaming agent in the base oil (namely the dispersion degree of the defoaming agent in the base oil). The reason for generating foam in oil products is mainly as follows: various additives are added into the oil product; the oil product is oxidized to generate an oxidation product; during operation of the lubricating oil, changes in ambient temperature and pressure cause the release of air dissolved in the oil; lubricating oil containing air releases air when stirred at high speed. The formation of stable foam in the oil is mainly due to the surface active substances dissolved in the oil: the surface active molecules tend to be adsorbed on a gas-liquid interface, and a stable surface film can be formed on the surface of the bubbles, so that the surface tension of the bubbles is reduced and is difficult to eliminate. The defoaming agent is uniformly mixed in the base oil, so that in the prepared aviation lubricating oil, the polyether modified silicone oil composite defoaming agent can be well dispersed everywhere, when bubbles are generated in the use of the aviation lubricating oil, the surface activity of the polyether modified silicone oil composite defoaming agent is large (the components of the composite defoaming agent T912 comprise a silicon type defoaming agent and a non-silicon type defoaming agent, the defoaming effect is good, a small amount of polyether modified silicone oil is used as an auxiliary material, the defoaming effect can be further improved), the polyether modified silicone oil composite defoaming agent can be quickly adsorbed on an oil film, a new surface film is formed to change the property of a bubble surface film, and a stable film cannot be formed, so that the foams in the aviation lubricating oil can be eliminated more easily, and the defoaming effect of the aviation lubricating. In addition, in this way, the mixing (not dissolution) of the polyether modified silicone oil composite defoaming agent and the base oil can be divided into a plurality of processes, on one hand, the mixing efficiency can be improved to improve the defoaming performance of the prepared aviation lubricating oil, and on the other hand, multithread cooperation is also facilitated (for example, one defoaming mixing portion 131 can supply a plurality of different summarizing mixing portions 132, and after a mixed first product is added into one summarizing mixing portion 132, the preparation of the first product of the other summarizing mixing portion 132 can be started without waiting), so that the preparation efficiency of the aviation lubricating oil is greatly improved. Adding a C (between 3 and 12) part of functional agent into a gathering mixing part 132 through a functional agent tank 122, and adding a second product and the functional agent (comprising antioxidant, detergent dispersant and extreme pressure antiwear agent) into a gathering mixing part 132 through the gathering mixing part 132At least one) is mixed for a third time at 50-70 ℃ to obtain a third product; the obtained third product flows to the physical defoaming part 140 through the collecting and mixing part 132, physical defoaming is carried out on the third product for 5-10 minutes, and the content of air dissolved in the third product is reduced to obtain the aviation lubricating oil; and then the aircraft lubricating oil is cooled by the cooling part 150, and the aircraft lubricating oil can be added into the finished oil tank 160 after being cooled to the normal temperature. The functional agent is added into the second product, so that the corresponding properties (such as pour point, detergency, oxidation resistance and the like) of the aviation lubricating oil can be further improved, the prepared aviation lubricating oil has more excellent properties, and the aviation lubricating oil can be suitable for corresponding working environments (such as a low-temperature starting environment, a large-span temperature difference working environment and the like).

Illustratively, the polyether modified silicone oil defoamer may include a composite defoamer T912 and a polyether modified silicone oil (for example, 90% of the composite defoamer T912, 1% of the polyether modified silicone oil, and 9% of a solvent of the polyether modified silicone oil), while the composite defoamer T912 includes a silicon type defoamer and a non-silicon type defoamer, and has good defoaming effect, and the defoaming effect can be further improved by adding a small amount of the polyether modified silicone oil.

In this embodiment, the preparation method of the aviation lubricating oil may further include the following steps: and (4) adding and mixing the pour point depressant. The pour point depressant addition and mixing procedure follows the base oil addition procedure and precedes the aggregate mixing procedure. In this case, the aircraft lubricating oil blending device 100 needs to include the pour point depressant tank 123 and the pour point depressant mixing section 133, a₁Between 60 and 88, A₂3-12, B is 0.02-0.10, so as to realize the addition of the pour point depressant and the execution of the mixing process.

Adding and mixing pour point depressants: adding A to the pour point depressing mixing section 133 through the base oil tank 110₃The base oil is added, D parts of pour point depressant are added into the pour point depressant mixing part 133 through a pour point depressant tank 123, the base oil and the pour point depressant are mixed for a fourth time at 40-60 ℃ through the pour point depressant mixing part 133 to obtain a fourth product, and the obtained fourth product is added into the summary mixing part 132, wherein A₃5 to 14, and D is 0.98 to 1.90.

Correspondingly, the summary mixing flow is as follows: and mixing the base oil, the first product and the fourth product at 50-70 ℃ for a second time period by a gathering and mixing part 132 to obtain a second product.

Adding A to the pour point depressing mixing section 133 through the base oil tank 110₃And (5-14) parts of base oil, adding D (between 0.98-1.90) parts of pour point depressant to the pour point depressing mixing part 133 through the pour point depressant tank 123, mixing the base oil (in the pour point depressing mixing part 133) and the pour point depressant at 40-60 ℃ for a fourth time through the pour point depressing mixing part 133 to obtain a fourth product, and adding the obtained fourth product to the summarizing and mixing part 132 so as to mix the base oil, the first product and the fourth product at 50-70 ℃ for a second time through the summarizing and mixing part 132 to obtain a second product. The pour point depressant can be divided into two parts to be mixed in such a way, so that the pour point depressant is fully mixed with the base oil, the pour point depression effect (the pour point of the base oil) is guaranteed while the mixing efficiency is improved, and the pour point depressant can be well matched with the mixing of the defoaming agent so as to improve the preparation efficiency of the aviation lubricating oil on the whole.

In this embodiment, the preparation method of the aviation lubricating oil may further include the following steps: adding and mixing the adhesive. The flow of the adhesive addition and mixing is after the base oil addition flow and before the summary mixing flow. In this case, the aircraft lubricating oil blending device 100 needs to include the pour point depressant tank 123, the pour point depressant mixing section 133, the finger adhesive tank 124, and the finger adhesive mixing section 134, a₁Between 60 and 83, A₂3 to 5, B0.02 to 0.10, A₃And D is between 5 and 6 and between 0.98 and 1.90, so that the finger adhesive adding and mixing processes are executed.

Adding and mixing a finger adhesive: adding A to the finger-sticking mixing section 134 via the base oil tank 110₄Adding E parts of a finger adhesive into a finger adhesive mixing part 134 through a finger adhesive tank 124, mixing the base oil and the finger adhesive at 50-70 ℃ for a fifth time through the finger adhesive mixing part 134 to obtain a fifth product, and adding the obtained fifth product into a summary mixing part 132, wherein A₄Between 5 and 6, E is between 1 and 11.

Correspondingly, the summary mixing flow is as follows: and mixing the base oil, the first product, the fourth product and the fifth product at 50-70 ℃ for a second time period by a gathering and mixing part 132 to obtain a second product.

Adding A to the finger-sticking mixing section 134 via the base oil tank 110₄(between 5 and 6) parts of base oil, adding E (between 1 and 11) parts of a finger adhesive into the finger adhesive mixing part 134 through the finger adhesive tank 124, mixing the base oil (in the finger adhesive mixing part 134) and the finger adhesive at 50 to 70 ℃ for a fifth time through the finger adhesive mixing part 134 to obtain a fifth product, and adding the obtained fifth product into the gathering mixing part 132; the base oil, the first product, the fourth product, and the fifth product (within the collective mixing section 132) are mixed by the collective mixing section 132 at 50-70 ℃ for a second length of time to obtain a second product. The mode can divide the finger-sticking agent into two parts to be mixed, so that the finger-sticking agent and the base oil can be mixed conveniently and fully, the improvement effect of the viscosity index (the viscosity-temperature performance of the base oil is improved, and the base oil meets the requirements of wide temperature change range and stable viscosity) is ensured while the mixing efficiency is improved, and the mode can be well matched with the mixing of the defoaming agent so as to improve the preparation efficiency of the aviation lubricating oil on the whole.

In this example, the functional agent may include 2 parts antioxidant, 3 parts detergent dispersant and 4 parts extreme pressure antiwear agent.

The antioxidant can well delay the oxidation of the prepared aviation lubricating oil and prolong the service life of the aviation lubricating oil. The detergent dispersant can neutralize organic acid and inorganic acid generated by oxidation of aviation lubricating oil and prevent further condensation of the organic acid and the inorganic acid, so that a paint film is reduced, and meanwhile, corrosion of parts caused by acidic substances can be prevented; meanwhile, the detergent dispersant is some surfactants, which can increase and dissolve solid or liquid substances which are not dissolved in oil into the center of a micelle formed by gathering 5-20 surfactant molecules, and during the use process, the detergent dispersant solubilizes oxygen-containing compounds containing hydroxyl, carbonyl and carboxyl, nitro-containing compounds, water and the like into the micelle to form colloid, thereby preventing further oxidation and condensation and reducing the formation and aggregation of harmful deposits on engine parts; the paint can adsorb the generated carbon deposit, paint film and other small solid particles to form a colloidal solution state, and disperse the colloidal solution state in oil, so that the substances are prevented from further agglomerating into large particles to be adhered to a machine member or depositing into oil sludge, and the paint film and the carbon deposit adsorbed on the surface of a part can be washed and dispersed in the oil, so that the engine and the metal surface are kept clean. The extreme pressure antiwear agent can well improve the extrusion antiwear property of the aviation lubricating oil and prevent sintering.

In this embodiment, the base oil may be modified silicone oil or fluoroether triazine, and in this case, A₁Is 72, A₂5, B is 0.10, the mixing temperature of the defoaming mixing part 131 is controlled at 65 ℃, the first time period is 15 minutes, A₃5, the pour point depressant is polymethacrylate, D is 1.50, the mixing temperature of the pour point depressing mixing part 133 is controlled at 55 ℃, the fourth time length is 15 minutes, A₄5, the finger-sticking agent is ethylene-propylene copolymer, E is 2.40, the mixing temperature of the finger-sticking mixing part 134 is controlled at 60 ℃, and the fifth time period is 30 minutes.

Correspondingly, the summary mixing flow is as follows: the defoaming mixer 131 adds the first product to the collective mixer 132, and the collective mixer 132 adds a to the first product₁A base oil and (A)₂+ B) portions of the first product are mixed for five minutes, and after the pour point depressing mixing portion 133 adds the fourth product to the collecting and mixing portion 132, the A is mixed by the collecting and mixing portion 132₁Part of base oil, (A)₂+ B) parts of the first product and (A)₃+ D) mixing the fourth product for 10 minutes, adding the fifth product into the collecting and mixing part 132 by the finger-sticking mixing part 134, and then adding the A into the collecting and mixing part 132₁Part of base oil, (A)₂+ B) parts of the first product, (A)₃+ D) parts of a fourth product and (A)₄+ E) portions of the fifth product were mixed together for 30 minutes to obtain the second product.

The base oil is modified silicone oil or fluoroether triazine A₁Is 72, A₂5, B is 0.10, the mixing temperature of the defoaming mixing part 131 is controlled at 65 ℃, the first time period is 15 minutes, A₃5, the pour point depressant is polymethacrylate, D is 1.50, the mixing temperature of the pour point depressing mixing part 133 is controlled at 55 ℃, the fourth time period is 15 minutes,A₄5, the finger-sticking agent is ethylene-propylene copolymer, E is 2.40, the mixing temperature of the finger-sticking mixing part 134 is controlled at 60 ℃, and the fifth time period is 30 minutes. The preparation process parameters of the aviation lubricating oil can well ensure the quality and the performance of the prepared aviation lubricating oil, and can well control the cost. And the mixing duration parameter (for example, the first duration is 15 minutes, the fourth duration is 15 minutes, the fifth duration is 30 minutes), not only can the quality of the aviation lubricating oil be well considered, but also the preparation efficiency of the aviation lubricating oil can be considered, and the low-intermittent preparation of the aviation lubricating oil can be realized by using less equipment, so that the preparation efficiency of the aviation lubricating oil is greatly improved. After the first product is fed into the collective mixing section 132 through the defoaming mixing section 131, a is fed into the collective mixing section 132₁A base oil and (A)₂+ B) portions of the first product are mixed for five minutes, and after the pour point depressing mixing portion 133 adds the fourth product to the collecting and mixing portion 132, the A is mixed by the collecting and mixing portion 132₁Part of base oil, (A)₂+ B) parts of the first product and (A)₃+ D) mixing the fourth product for 10 minutes, adding the fifth product into the collecting and mixing part 132 by the finger-sticking mixing part 134, and then adding the A into the collecting and mixing part 132₁Part of base oil, (A)₂+ B) parts of the first product, (A)₃+ D) parts of a fourth product and (A)₄+ E) portions of the fifth product were mixed together for 30 minutes to obtain the second product. In this way, the best aeronautical oil blending effect can be obtained by considering the adding sequence of the defoaming agent, the pour point depressant and the finger-sticking agent and the difference between the temperature parameter during mixing and the temperature parameter during mixing. Moreover, such a mixing time period distribution can enable the 1 defoaming mixing part 131, the 1 pour point depressing mixing part 133 and the 2 sticking finger mixing part 134 to be matched with the 4 summarizing mixing parts 132 for non-intermittent preparation, and the preparation efficiency of the aviation lubricating oil is improved by 4 times (the intermittent operation possibly involved in the preparation process, such as the time required for oil discharge, is not considered here). Therefore, the preparation efficiency of the aviation lubricating oil can be greatly improved.

In this example, the base oil may be a synthetic oil PAO, where A₁Is 80, A₂12, B is 0.10, and the mixing temperature of the defoaming mixing section 131 is controlledAt 65 ℃, the first time period is 20 minutes, the second time period is 40 minutes, the functional agent comprises 1.50 parts of antioxidant, 2.90 parts of detergent dispersant and 3 parts of extreme pressure antiwear agent, and 0.50 part of alkyl polyamide, and the third time period is 30 minutes.

The base oil is synthetic oil PAO which has excellent performance, and the pour point, the viscosity-temperature performance and the like of the synthetic oil PAO are very good, so that after the polyether modified silicone oil composite antifoaming agent is added and mixed in stages (the mixing uniformity and the mixing efficiency can be improved), the additive (namely the functional agent, for example, the functional agent comprises 1.50 parts of antioxidant, 2.90 parts of detergent dispersant and 3 parts of extreme pressure antiwear agent) is added and mixed, and the aviation lubricating oil with better performance can be efficiently prepared.

In this embodiment, the base oil may be neopentyl polyol ester, and then, the components of the polyether modified silicone oil composite defoaming agent further include polyether modified polysiloxane, and the functional agents include 2 parts of ashless antioxidant, 3 parts of ashless detergent dispersant, 4 parts of extreme pressure antiwear agent, 1 part of anticorrosive antirust agent, and 1 part of metal deactivator. A. the₁Is 70, A₂5, B0.10, the mixing temperature of the defoaming mixing part is controlled at 65 ℃, the first time length is 15 minutes, A₃5, the pour point depressant is polymethacrylate, D is 1.50, the mixing temperature of the pour point depressing mixing part is controlled at 55 ℃, the fourth time length is 15 minutes, A₄5, the finger-sticking agent is ethylene-propylene copolymer, E is 2.40, the mixing temperature of the finger-sticking mixing part is controlled at 60 ℃, and the fifth time period is 30 minutes.

Correspondingly, the summary mixing flow is as follows: the defoaming mixer 131 adds the first product to the collective mixer 132, and the collective mixer 132 adds a to the first product₁A base oil and (A)₂+ B) portions of the first product are mixed for five minutes, and after the pour point depressing mixing portion 133 adds the fourth product to the collecting and mixing portion 132, the A is mixed by the collecting and mixing portion 132₁Part of base oil, (A)₂+ B) parts of the first product and (A)₃+ D) mixing the fourth product for 10 minutes, adding the fifth product into the collecting and mixing part 132 by the finger-sticking mixing part 134, and then adding the A into the collecting and mixing part 132₁Part of base oil, (A)₂+ B) parts of the first product, (A)₃+ D) parts of a fourth product and (A)₄+ E) fifth productMixing the two products together for 30 minutes to obtain a second product.

The functional agent comprises 2 parts of ashless antioxidant, 3 parts of ashless clean dispersant, 4 parts of extreme pressure antiwear additive, 1 part of anticorrosive antirust agent and 1 part of metal deactivator, the base oil is neopentyl polyol ester, the components of the polyether modified silicone oil composite defoamer also comprise polyether modified polysiloxane, A₁Is 70, A₂5, B0.10, the mixing temperature of the defoaming mixing part is controlled at 65 ℃, the first time length is 15 minutes, A₃5, the pour point depressant is polymethacrylate, D is 1.50, the mixing temperature of the pour point depressing mixing part is controlled at 55 ℃, the fourth time length is 15 minutes, A₄5, the finger-sticking agent is ethylene-propylene copolymer, E is 2.40, the mixing temperature of the finger-sticking mixing part is controlled at 60 ℃, and the fifth time period is 30 minutes. The preparation process parameters of the aviation lubricating oil can well ensure the quality and the performance of the prepared aviation lubricating oil, and can well control the cost. And the mixing duration parameter (for example, the first duration is 15 minutes, the fourth duration is 15 minutes, the fifth duration is 30 minutes), not only can the quality of the aviation lubricating oil be well considered, but also the preparation efficiency of the aviation lubricating oil can be considered, and the low-intermittent preparation of the aviation lubricating oil can be realized by using less equipment, so that the preparation efficiency of the aviation lubricating oil is greatly improved. Adding the first product into the gathering and mixing part through the defoaming and mixing part, and adding the first product into the gathering and mixing part through the gathering and mixing part₁A base oil and (A)₂+ B) mixing the first product for five minutes, adding the fourth product into the collecting and mixing part in the pour point depressing and mixing part, and then adding the product A into the collecting and mixing part in the collecting and mixing part₁Part of base oil, (A)₂+ B) parts of the first product and (A)₃+ D) mixing the fourth product for 10 minutes, adding the fifth product into the gathering and mixing part by the finger-sticking mixing part, and then adding the A into the gathering and mixing part by the gathering and mixing part₁Part of base oil, (A)₂+ B) parts of the first product, (A)₃+ D) parts of a fourth product and (A)₄+ E) portions of the fifth product were mixed together for 30 minutes to obtain the second product. In this way, the best aviation lubricating oil adjustment can be obtained by considering the adding sequence of the defoaming agent, the pour point depressant and the finger-sticking agent and the difference of the temperature parameters during the respective mixing and the temperature parameters during the co-mixingAnd (5) obtaining a resultant effect. Moreover, the mixing time length distribution can enable 1 defoaming mixing part, 1 pour point depressing mixing part and 2 sticky finger mixing parts to be matched with 4 summary mixing parts for non-intermittent preparation, and the preparation efficiency of the aviation lubricating oil is improved by 4 times (the intermittence possibly involved in the preparation process, such as the time required by oil drainage, is not considered). Therefore, the preparation efficiency of the aviation lubricating oil can be greatly improved.

In the present example, the parts of the raw materials represent the weight ratio. In addition, physical defoaming is firstly carried out, and then cooling is carried out, so that the air content in the aviation lubricating oil can be reduced as far as possible.

In order to enable the prepared aviation lubricating oil (turbine engine oil) to show excellent performance in a wide temperature range and meet military specifications of MIL-PRF-23699G specification and civil specifications of SAE-AS-5780 specification of the product (turbine engine oil), the prepared aviation lubricating oil needs certain indexes such AS viscosity, pour point, flash point and the like, and the key point for meeting the indexes is to select base oil meeting the requirements.

Aviation turbine engine oils are exposed to increasingly harsh environments including high temperatures, oxidation, etc. which can lead to undesirable consequences for the engine oil, particularly sludge, coking, etc. in the system. Coking is generally believed to be due to carbon deposits that form on engine surfaces over long periods of oil use. If these deposits are generated within the engine, they may clog oil passages and filters, thereby reducing heat transfer. The aviation industry has developed hydrothermal fluid simulation testers to assess the coking propensity of aviation turbine engine oils, a critical requirement for both civilian and military use.

Illustratively, to ensure that the aviation lubricating oil (i.e., aviation turbine engine oil) prepared meets the following criteria: the viscosity at 100 ℃ is 4.9-5.4 mm²(preferably 4.9 to 5.15 mm)²S) viscosity at-40 ℃ of less than 13000mm²S (preferably less than 11500 mm)²S), pour point less than-54 deg.C (preferably less than-57 deg.C), flash point greater than 246 deg.C (preferably greater than 250 deg.C). When modified silicone oil, fluoroether triazine, PAO, neopentyl polyol ester and the like are used as base oil, the base oil may be selectedA base oil meeting the following criteria: the dynamic viscosity of the base oil at 40 ℃ is 20-30 mm²(preferably 22 to 25 mm)/s²S) and a dynamic viscosity of 4 to 6mm at 100 DEG C²(preferably 4.85-5.15 mm)²(s) dynamic viscosity at-40 ℃ of 7000 to 13000mm²(preferably 8000-10000 mm/s)²And/s), the pour point is-50 to-65 ℃ (preferably-55 to-60 ℃), and the flash point is 230 to 260 ℃ (preferably 250 to 260 ℃).

In addition, in order to make the prepared aviation lubricating oil meet the requirements of MIL-PRF-23699G and SAE-AS-5780 specifications, besides the polyether modified silicone oil complex antifoaming agent, pour point depressant, finger-sticking agent and the functional agents (such AS antioxidant, detergent dispersant and extreme pressure antiwear agent) used in the foregoing examples, other types of functional agents can be added to the base oil to improve the corresponding properties of the prepared aviation lubricating oil.

For example, in the case of neopentyl polyol ester as a base oil, an ashless antioxidant, an ashless dispersant, an ashless detergent, a corrosion and rust inhibitor, a metal deactivator, an antiwear agent, an extreme pressure agent, a pour point depressant, a wax modifier, a viscosity modifier, a seal compatibility agent, a friction modifier, an anti-stain agent, a coloring agent, an anti-foaming agent, a demulsifier, and other conventional additive packages may be added.

Illustratively, viscosity index improvers (i.e., finger-stick agents, also known as VI improvers, viscosity modifiers, or viscosity improvers) impart shear stability at high temperatures and acceptable viscosity at low temperatures to the lubricant. For example, neopentyl polyol ester is used as the base oil, and ethylene-propylene copolymer is used as the viscosity index improver.

The antioxidant can delay the oxidative degradation of the aviation lubricating oil in use (the oxidative degradation can cause sludge and deposition on the metal surface and increase the viscosity of the fluid), so that the antioxidant performance of the aviation lubricating oil is improved.

For example, the antioxidant may be selected from amine type antioxidants, including, for example, alkyl or non-alkyl substituted aromatic amines. Neopentyl polyol ester is used as base oil, and the following can be specifically used: antioxidants such as P, P' -diisooctyldiphenylamine, tert-octylphenyl- α -naphthylamine, phenyl- α -naphthylamine and P-octylphenyl- α -naphthylamine may be used alone or in combination with one another by type. These additives may be used in an amount of 0.01 to 5% (i.e., 0.01 to 5 parts), preferably 0.01 to 2% (i.e., 0.01 to 2 parts).

Illustratively, the detergents may be of the simple or mixed type, and suitable detergents include compounds containing long chain lipophilic groups and short anionic or oleophobic groups in the molecule. Detergents may optionally include alkali metal and alkaline earth metal salts of sulfuric acid, sulfonic acid, phenol, carboxylic acid, phosphoric acid, salicylic acid. For example, typical aryl sulfonates contain about 9 to 80 or more carbon atoms, and more typically 16 to 80 carbon atoms.

Exemplary pour point depressants (i.e., pour point depressants) suitable for use with neopentyl polyol ester as the base oil include: polymethacrylates, polyacrylates, polyaramides, ethylene-propylene polymers. Polymethacrylates are preferred in this embodiment.

The defoaming agent can delay the formation of foam, and in order to improve the defoaming performance of the aviation lubricating oil as much as possible, in this embodiment, neopentyl polyol ester is used as the base oil, and the polyether modified silicone oil composite defoaming agent may further include a polyether modified polysiloxane component. Of course, the amount of the polyether modified silicone oil complex antifoaming agent used herein should be referred to the amount of other additives such as demulsifiers, and generally, the amount of the polyether modified silicone oil complex antifoaming agent is preferably not more than 1% (wt) together with other additives such as demulsifiers.

In addition, suitable dispersants typically contain polar groups attached to a relatively high molecular weight hydrocarbon chain. The polar group typically contains N, O, P at least one element. Typical hydrocarbon chains contain about 50-400 carbons, and suitable dispersants are: phenates, sulfonates, salicylates, naphthenates, stearates, carbamates, thiocarbamates, and the like. The dispersant is particularly effective as a class of alkenyl derivatives, which alkenyl groups may be polyisobutenyl. The amount of such additives (dispersants) is about 0.01 to 3 wt%, i.e., 0.01 to 3 parts, based on neopentyl polyol ester as a base oil. The amount used with the detergents described above may be from 1 to 4 parts (preferably 3 parts).

The embodiment of the application further provides aviation lubricating oil, which is prepared by operating the aviation lubricating oil blending device in the embodiment through the preparation method of the aviation lubricating oil provided by the embodiment, and the aviation lubricating oil is good in performance and more outstanding in defoaming performance.

For example, the aviation lubricating oil prepared by using the modified silicone oil as the base oil is taken as an example: 72 parts of base oil were added to the collective mixing section via a base oil tank. 5 parts of base oil is added into the defoaming mixing part through a base oil tank, 0.10 part of polyether modified silicone oil composite defoaming agent is added into the defoaming mixing part through a defoaming agent tank, the base oil and the polyether modified silicone oil composite defoaming agent are mixed for 15 minutes at 65 ℃ through the defoaming mixing part to obtain a first product, and then the obtained first product is added into the summarizing mixing part. And 5 parts of base oil is added into the pour point depressing mixing part through a base oil tank, 1.50 parts of pour point depressant is added into the pour point depressing mixing part through a pour point depressing tank, the base oil and the pour point depressant are subjected to 15 minutes at 55 ℃ through the pour point depressing mixing part to obtain a fourth product, and the obtained fourth product is added into the collecting and mixing part. And then 5 parts of base oil is added into the finger sticking mixing part through a base oil tank, 2.40 parts of finger sticking agent is added into the finger sticking mixing part through a finger sticking agent tank, the base oil and the finger sticking agent are mixed for 30 minutes at 60 ℃ through the finger sticking mixing part to obtain a fifth product, and then the obtained fifth product is added into the gathering mixing part.

At this time, A₁Is 72, A₂5, B is 0.10, the mixing temperature of the defoaming mixing part 131 is controlled at 65 ℃, the first time period is 15 minutes, A₃5, the pour point depressant is polymethacrylate, D is 1.50, the mixing temperature of the pour point depressing mixing part 133 is controlled at 55 ℃, the fourth time length is 15 minutes, A₄5, the finger-sticking agent is ethylene-propylene copolymer, E is 2.40, the mixing temperature of the finger-sticking mixing part 134 is controlled at 60 ℃, and the fifth time period is 30 minutes.

Correspondingly, the summary mixing flow is as follows: after the defoaming mixing portion added the first product to the portion of mixing that gathers, mix 72 parts base oil and 5.10 parts first product through the portion of mixing that gathers for five minutes, after the pour point depressing mixing portion added the fourth product to the portion of mixing that gathers, mix 72 parts base oil, 5.10 parts first product and 6.50 parts fourth product through the portion of mixing that gathers for 10 minutes jointly, after the portion of mixing that glues indicates to add the fifth product to the portion of mixing that gathers, mix 72 parts base oil, 5.10 parts first product, 6.50 parts fourth product and 7.40 parts fifth product for 30 minutes jointly through the portion of mixing that gathers, obtain the second product.

Then 9 parts of functional agent (2 parts of antioxidant, 3 parts of detergent dispersant and 4 parts of extreme pressure antiwear additive, of course, other additives such as anticorrosive antirust agent, metal passivator, wax modifier, seal compatilizer, friction modifier and the like can be contained in the summary mixing part, and the total parts are 9 parts) are added into the summary mixing part, and the second product and the functional agent are mixed for 30 minutes at 60 ℃ through the summary mixing part to obtain a third product.

Then, the third product flow direction physics defoaming portion that will obtain through gathering the mixing portion, physics defoaming portion carries out physics defoaming 10 minutes to the third product, reduces the air content of dissolving in the third product, obtains aviation lubricating oil. And then the obtained aviation lubricating oil flows to a cooling part through a physical defoaming part, and after the aviation lubricating oil is cooled to normal temperature, the cooled aviation lubricating oil is added into a finished oil tank through the cooling part.

The aviation lubricating oil obtained in this way had the following properties (as shown in table 1):

table 1: physical and chemical properties of aviation lubricating oil

Index name	Index (I)	Typical value
			Viscosity at-40 ℃ in mm²/s	≤13000	12000
Viscosity change rate after 72h at-40%	±6	2
			Viscosity at 100 ℃ in mm²/s	4.90-5.40	5.05cSt
Viscosity at 40 ℃ in mm²/s	Not less than 23.0	24.8cSt
			Flash point, DEG C	≥246	250
Pour point, DEG C	≤-54	-60
			Total Acid Number (TAN), mgKOH/G	≤0.75	0.5

The physicochemical properties of the aviation lubricating oil (aviation turbine engine oil) prepared by the method meet the index requirements of the MIL-PRF-23699G and SAE-AS-5780 specifications, and the anti-foaming performance can be further improved.

Of course, the aviation lubricating oil prepared in the above manner is only exemplary, and other aviation lubricating oils prepared in other manners have physical and chemical performance indexes meeting the index requirements of the MIL-PRF-23699G and SAE-AS-5780 specifications, and are not described herein again.

In summary, the present application implementsAn aviation lubricant and a method for preparing the same are provided, wherein A is added to a gathering and mixing part 132 through a base oil tank 110₁(between 60 and 94) parts of base oil; a is added to the defoaming mixing portion 131 through the base oil tank 110₂(between 3 and 28) parts of base oil, adding B (between 0.02 and 0.10) parts of polyether modified silicone oil composite defoaming agent into a defoaming mixing part 131 through a defoaming tank 121, mixing the base oil (in the defoaming mixing part 131) and the polyether modified silicone oil composite defoaming agent at 55 to 75 ℃ for a first time through the defoaming mixing part 131 to obtain a first product, and adding the obtained first product into a summarizing mixing part 132. And mixing the base oil (in the gathering mixing part 132) and the first product at 50-70 ℃ for a second time period through the gathering mixing part 132 to obtain a second product. The aviation lubricating oil prepared by the method can ensure the uniform mixing degree of the polyether modified silicone oil composite defoaming agent in the base oil (namely the dispersion degree of the defoaming agent in the base oil). The reason for generating foam in oil products is mainly as follows: various additives are added into the oil product; the oil product is oxidized to generate an oxidation product; during operation of the lubricating oil, changes in ambient temperature and pressure cause the release of air dissolved in the oil; lubricating oil containing air releases air when stirred at high speed. The formation of stable foam in the oil is mainly due to the surface active substances dissolved in the oil: the surface active molecules tend to be adsorbed on a gas-liquid interface, and a stable surface film can be formed on the surface of the bubbles, so that the surface tension of the bubbles is reduced and is difficult to eliminate. The defoaming agent is uniformly mixed in the base oil, so that in the prepared aviation lubricating oil, the polyether modified silicone oil composite defoaming agent can be well dispersed everywhere, when bubbles are generated in the use of the aviation lubricating oil, the surface activity of the polyether modified silicone oil composite defoaming agent is large (the components of the composite defoaming agent T912 comprise a silicon type defoaming agent and a non-silicon type defoaming agent, the defoaming effect is good, a small amount of polyether modified silicone oil is used as an auxiliary material, the defoaming effect can be further improved), the polyether modified silicone oil composite defoaming agent can be quickly adsorbed on an oil film, a new surface film is formed to change the property of a bubble surface film, and a stable film cannot be formed, so that the foams in the aviation lubricating oil can be eliminated more easily, and the defoaming effect of the aviation lubricating. And, this kind ofThe method can also divide the mixing (not dissolving) of the polyether modified silicone oil composite defoaming agent and the base oil into a plurality of processes, on one hand, the mixing efficiency can be improved to improve the defoaming performance of the prepared aviation lubricating oil, and on the other hand, the multithread cooperation is also favorably realized (for example, one defoaming mixing part 131 can supply a plurality of different summarizing mixing parts 132, and after a mixed first product is added into one summarizing mixing part 132, the preparation of the first product of the other summarizing mixing part 132 can be started without waiting), so that the preparation efficiency of the aviation lubricating oil is greatly improved. Adding a C (between 3 and 12) part of functional agent into the summarizing and mixing part 132 through the functional agent tank 122, and mixing the second product and the functional agent (comprising at least one of an antioxidant, a detergent dispersant and an extreme pressure antiwear agent) for a third time at 50 to 70 ℃ through the summarizing and mixing part 132 to obtain a third product; the obtained third product flows to the physical defoaming part 140 through the collecting and mixing part 132, physical defoaming is carried out on the third product for 5-10 minutes, and the content of air dissolved in the third product is reduced to obtain the aviation lubricating oil; and then the aircraft lubricating oil is cooled by the cooling part 150, and the aircraft lubricating oil can be added into the finished oil tank 160 after being cooled to the normal temperature. The functional agent is added into the second product, so that the corresponding properties (such as pour point, detergency, oxidation resistance and the like) of the aviation lubricating oil can be further improved, the prepared aviation lubricating oil has more excellent properties, and the aviation lubricating oil can be suitable for corresponding working environments (such as a low-temperature starting environment, a large-span temperature difference working environment and the like).

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above embodiments are merely examples of the present application and are not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A preparation method of aviation lubricating oil is characterized in that an aviation lubricating oil blending device comprises a base oil tank, a defoaming agent tank, a functional agent tank, a defoaming and mixing part, a summarizing and mixing part, a physical defoaming part, a cooling part and a product oil tank, and the method comprises the following steps:

adding A to the collective mixing section via the base oil tank₁A base oil, wherein A₁Between 60 and 94;

adding A to the defoaming mixing part through the base oil tank₂The method comprises the following steps of proportioning base oil, adding B parts of polyether modified silicone oil composite defoaming agent into a defoaming mixing part through a defoaming agent tank, mixing the base oil and the polyether modified silicone oil composite defoaming agent for a first time at 55-75 ℃ through the defoaming mixing part to obtain a first product, and adding the obtained first product into a collecting mixing part, wherein A is₂3-28 parts of the polyether modified silicone oil composite defoaming agent, and 0.02-0.10 part of the B component, wherein the components of the polyether modified silicone oil composite defoaming agent comprise polyether modified silicone oil and non-silicon type antifoaming agent T912;

mixing the base oil and the first product at 50-70 ℃ for a second time period through the gathering and mixing part to obtain a second product;

adding C parts of functional agent into the summarizing and mixing part through the functional agent tank, and mixing the second product and the functional agent at 50-70 ℃ for a third time through the summarizing and mixing part to obtain a third product, wherein the functional agent comprises at least one of an antioxidant, a detergent dispersant and an extreme pressure antiwear agent, and C is 3-12;

enabling the obtained third product to flow to the physical defoaming part through the summarizing and mixing part, and physically defoaming the third product for 5-10 minutes by the physical defoaming part to reduce the content of air dissolved in the third product to obtain the aviation lubricating oil;

and the obtained aviation lubricating oil flows to the cooling part through the physical defoaming part, and when the aviation lubricating oil is cooled to normal temperature, the cooled aviation lubricating oil is added into the finished oil tank through the cooling part.

2. The method of claim 1, wherein the aircraft lubricant blending unit further comprises a pour point depressant tank and a pour point depressant mixing section, a₁Between 60 and 88, A₂Between 3 and 12 and B between 0.02 and 0.10, the method further comprising:

adding A to the pour point depressing mixing section through the base oil tank₃Adding D parts of pour point depressant to the pour point depressing mixing part through the pour point depressant tank, mixing the base oil and the pour point depressant at 40-60 ℃ for a fourth time through the pour point depressing mixing part to obtain a fourth product, and adding the obtained fourth product to the collecting and mixing part, wherein A is₃5-14, and D is 0.98-1.90;

correspondingly, the way of obtaining the second product is:

and mixing the base oil, the first product and the fourth product at 50-70 ℃ for a second time through the gathering and mixing part to obtain the second product.

3. The method of claim 2, wherein the aircraft lubricant blending unit further comprises a finger stick tank and a finger stick mixing section, A₁Between 60 and 83, A₂3 to 5, B0.02 to 0.10, A₃Between 5 and 6 and D between 0.98 and 1.90, the method further comprising:

adding A to the viscous finger mixing part through the base oil tank₄Adding E parts of a finger adhesive into the finger adhesive mixing part through the finger adhesive tank, mixing the base oil and the finger adhesive at 50-70 ℃ for a fifth time through the finger adhesive mixing part to obtain a fifth product, and adding the obtained fifth product into the gathering and mixing part, wherein A is₄5-6, E is 1-11;

correspondingly, the way of obtaining the second product is:

and mixing the base oil, the first product, the fourth product and the fifth product at 50-70 ℃ for a second time period through the gathering and mixing part to obtain the second product.

4. The method for preparing the aviation lubricating oil of claim 3, wherein the functional agent comprises 2 parts of antioxidant, 3 parts of detergent dispersant and 4 parts of extreme pressure antiwear agent.

5. The method for preparing aviation lubricating oil according to claim 4, wherein the base oil is modified silicone oil or fluoroether triazine, and A₁Is 72, A₂5, B is 0.10, the mixing temperature of the defoaming mixing part is controlled at 65 ℃, the first time length is 15 minutes, A₃5, the pour point depressant is polymethacrylate, D is 1.50, the mixing temperature of the pour point depressant mixing part is controlled to be 55 ℃, the fourth time is 15 minutes, A₄5, the finger-gluing agent is ethylene-propylene copolymer, E is 2.40, the mixing temperature of the finger-gluing mixing part is controlled at 60 ℃, the fifth time is 30 minutes, and the second product is obtained by the following method:

the defoaming mixing part adds the first product into the collecting and mixing part, and then the A is added into the product through the collecting and mixing part₁A base oil and (A)₂+ B) mixing the first product for five minutes, and adding the product A through the collecting and mixing part after the pour point depressing and mixing part adds the fourth product into the collecting and mixing part₁Part of base oil, (A)₂+ B) parts of said first product and (A)₃+ D) mixing the fourth product for 10 minutes, adding the fifth product into the gathering and mixing part by the finger-sticking mixing part, and then adding the A into the gathering and mixing part by the gathering and mixing part₁Part of base oil, (A)₂+ B) parts of said first product, (A)₃+ D) parts of said fourth product and (A)₄+ E) portions of said fifth product were mixed together for 30 minutes to obtain said second product.

6. The method of making an aviation lubricating oil of claim 1, wherein the method comprisesCharacterized in that the base oil is synthetic oil PAO, A₁Is 80, A₂12, 0.10 of B, controlling the mixing temperature of the defoaming mixing part at 65 ℃, controlling the first time length to be 20 minutes, controlling the second time length to be 40 minutes, controlling the functional agent to comprise 1.50 parts of antioxidant, 2.90 parts of detergent dispersant and 3 parts of extreme pressure antiwear agent, and 0.50 part of alkyl polyamide, and controlling the third time length to be 30 minutes.

7. The preparation method of the aircraft lubricating oil of claim 1, wherein the functional agent comprises 2 parts of ashless antioxidant, 3 parts of ashless detergent dispersant, 4 parts of extreme pressure antiwear agent, 1 part of anti-corrosion antirust agent and 1 part of metal deactivator, the base oil is neopentyl polyol ester, the components of the polyether modified silicone oil composite defoamer further comprise polyether modified polysiloxane, A is₁Is 70, A₂5, B is 0.10, the mixing temperature of the defoaming mixing part is controlled at 65 ℃, the first time length is 15 minutes, A₃5, the pour point depressant is polymethacrylate, D is 1.50, the mixing temperature of the pour point depressant mixing part is controlled to be 55 ℃, the fourth time is 15 minutes, A₄5, the finger-gluing agent is ethylene-propylene copolymer, E is 2.40, the mixing temperature of the finger-gluing mixing part is controlled at 60 ℃, the fifth time is 30 minutes, and the second product is obtained by the following method:

the defoaming mixing part adds the first product into the collecting and mixing part, and then the A is added into the product through the collecting and mixing part₁A base oil and (A)₂+ B) mixing the first product for five minutes, and adding the product A through the collecting and mixing part after the pour point depressing and mixing part adds the fourth product into the collecting and mixing part₁Part of base oil, (A)₂+ B) parts of said first product and (A)₃+ D) mixing the fourth product for 10 minutes, adding the fifth product into the gathering and mixing part by the finger-sticking mixing part, and then adding the A into the gathering and mixing part by the gathering and mixing part₁Part of base oil, (A)₂+ B) parts of said first product, (A)₃+ D) parts of said fourth product and (A)₄+ E) portions of said fifth product are mixed together for 30 minutes to obtain said second product。

8. An aviation lubricating oil, characterized by being produced by the method for producing an aviation lubricating oil according to any one of claims 1 to 7.