CN115466641B

CN115466641B - Gear oil special for vertical mill, processing method and device

Info

Publication number: CN115466641B
Application number: CN202210992981.7A
Authority: CN
Inventors: 陆水; 邹帅; 窦明远; 冯清; 杨靖; 李康春; 邓富康; 黄福川
Original assignee: Guangxi University
Current assignee: Guangxi University
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2023-09-19
Anticipated expiration: 2042-08-18
Also published as: CN115466641A

Abstract

The application relates to gear oil special for vertical mill, a processing method and a device, wherein the gear oil special for vertical mill comprises the following components in percentage by mass: base oil: 84.72 to 89.25 percent of base oil is the composition of 55 to 60 percent of III base oil and 40 to 45 percent of triphenyl phosphate according to the mass ratio; an antioxidant: 2.0 to 3.0 percent; metal deactivators: 0.02% -0.08%; viscosity index improver: 1.0 to 2.0 percent; extreme pressure agent: 3.0 to 4.0 percent; antiwear agent: 4.0 to 5.0 percent; rust inhibitor: 0.02% -0.12%; demulsifier: 0.05 to 0.08 percent; friction modifier: 0.66 to 1.0 percent. The technical scheme of the application effectively solves the problem that lubricating oil of the vertical mill in the prior art is easy to lose efficacy.

Description

Gear oil special for vertical mill, processing method and device

Technical Field

The application relates to the technical field of lubricating oil, in particular to gear oil special for vertical mill, a processing method and a device.

Background

The vertical mill consists of a casing, a base, a grinding roller, a grinding disc, a pressurizing device, a transmission device, a lubrication system and the like. The main difference is the different roll disc shapes, and mill specifications are typically expressed in terms of disc diameter. The technical term of vertical mill is roll mill. Since this mill is operated in a standing mode, it is conventionally called a vertical mill, also called a grinding mill.

The grinding equipment is used for crushing solid materials into smaller particles from massive materials under the action of mechanical force, and is widely applied to grinding in industries of building materials, metallurgy, mines, ceramics and the like, wherein the Mohs hardness is below 9, and the humidity is below 6 percent of various nonflammable and explosive mineral materials, such as cement (raw clinker), limestone, ceramics, glass and the like, for grinding and processing thousands of materials. Common milling machines are: ball mill, vertical mill, hammer mill, vibration mill, and air flow mill. The crushing modes are different due to the different properties of materials and the required crushing fineness. The basic crushing modes include extrusion crushing, impact crushing, friction shearing crushing, splitting crushing and the like according to the different modes of applying external force.

Large vertical mills are generally widely used for grinding heavy calcium carbonate. The equipment mainly comprises a grinding roller assembly, a grinding disc assembly, a hydraulic assembly, a transmission arm assembly, a main reducer lubrication station, a PLC electric control cabinet and the like. The calcium carbonate vertical mill integrates crushing, drying, grinding, grading and conveying into a whole, and has a vertical structure and compact layout. Starting from various angles such as grinding efficiency, material drying, wearing of wearing parts, maintenance and replacement of accessories, and the like, the method has the advantages of lower energy consumption, stronger drying capacity, lower wearing of core parts and more convenient maintenance, and saves the running cost of equipment of customers; the repeated grinding can be reduced, the granularity and chemical components of the product are better controlled, and the product quality is convenient to stabilize; meanwhile, the grinding roller and the grinding disc are not in direct contact, the iron content in the product is low, and the whiteness and purity of the material are effectively ensured; and the device works under negative pressure, so that no dust overflows; the automatic control system is equipped to realize the free switching of remote control and field control, and the operation is simple and convenient and the manpower is saved.

The working principle of the large vertical mill is as follows: the vertical mill utilizes the relative motion of the grinding roller and the grinding disc to grind the material in a material bed, and the fineness of the material is reduced along with the increase of the grinding pressure of the grinding roller; drying and taking up the ground materials by hot air, classifying the materials in a mill by a classifying device on the ground materials, and enabling coarse powder to fall into a millstone to be crushed again; and delivering and grinding the qualified fine powder to a bag dust collector by wind for collection.

Spiral bevel-planetary gears are the most important of the power transmissions of large vertical mills. The device has the advantages of compact structure, small volume, light weight, high transmission efficiency, large differential ratio and low noise. The box body is of a cylindrical closed structure, the outer wall of the box body only bears pressure, and the transmission power can reach 4100kw. The vertical mill can transmit motion and power between any two shafts by utilizing a gear mechanism; meanwhile, the gear has the characteristics of large transmission power range, high efficiency and the like. In any gear transmission, if the flanks mesh directly, the flanks may form a mutual adhesion, and the flanks will wear, heat, burn, or even weld, resulting in gear failure. Therefore, gear oil is required to be used for separating the working surfaces of the gears so as to ensure the normal operation of the gears, and the gear mechanism mainly plays roles of preventing the tooth surfaces from being worn, taking away heat generated by the friction of the tooth surfaces, isolating the tooth surfaces from contact with air, moisture and dust, avoiding rust, corrosion, abrasion and the like of the gears. Statistics of the data, about 54% of the mechanical failures are caused by lubrication problems, with under-lubrication and under-lubrication accounting for 34.4% and 19.6% respectively, and the importance of gear oil to gear transmission is seen.

The lubrication mechanism of the gear is that the lubricant enters the working position of gear engagement to form an effective lubrication film, so that the engagement surfaces are separated, the motion friction of the engagement tooth surfaces is changed into the internal friction of the lubrication film, thereby reducing the friction, reducing the abrasion and prolonging the service life of the large vertical mill. However, in the use process of the vertical mill, the abrasion resistance effect of the lubricating oil in the prior art is not ideal, and especially after the vertical mill is used for a period of time in a high-temperature, high-humidity and multi-dust environment, the lubricating performance of the lubricating oil is seriously reduced, so that equipment is seriously worn or even blocked.

Disclosure of Invention

The application provides gear oil special for a vertical mill, a processing method and a device, which are used for solving the problem that lubricating oil of the vertical mill in the prior art is easy to fail.

The application provides gear oil special for vertical mill, which comprises the following components in percentage by mass:

base oil: 84.72 to 89.25 percent of base oil is the composition of 55 to 60 percent of III base oil and 40 to 45 percent of triphenyl phosphate according to the mass ratio;

an antioxidant: 2.0 to 3.0 percent;

metal deactivators: 0.02% -0.08%;

viscosity index improver: 1.0 to 2.0 percent;

extreme pressure agent: 3.0 to 4.0 percent;

antiwear agent: 4.0 to 5.0 percent;

rust inhibitor: 0.02% -0.12%;

demulsifier: 0.05 to 0.08 percent;

friction modifier: 0.66 to 1.0 percent.

Further, the base oil is a composite of 55-60% of III base oil and 40-45% of triphenyl phosphate in mass ratio.

Further, the antioxidant is the composition of the sulfur-phosphorus dioctyl basic zinc salt with the mass ratio of 60-70 percent and the 2, 6-di-tert-butyl-p-cresol with the mass ratio of 30-40 percent.

Further, the metal deactivator is the composition of N' -di-n-butylaminomethylene benzotriazole in 30-40 wt% and alkyl diphenylamine in 60-70 wt%.

Further, the viscosity index improver is a polyisobutylene having a molecular weight of 1300; the extreme pressure agent is vulcanized lard; the friction modifier is benzotriazole fatty amine salt.

Further, the antiwear agent is a composite of 50-60% of vulcanized isobutene and 40-50% of di-n-butyl phosphite by mass ratio.

Further, the rust inhibitor is a compound of any two or more of phosphate amine salt, alkenyl succinic acid, alkali barium dinonyl naphthalene sulfonate and barium petroleum sulfonate.

Further, the demulsifier is a composite of 40 to 50 mass percent of propylene oxide, 20 to 35 mass percent of condensate of amine and epoxy compound and 25 to 30 mass percent of polyether polymer compound.

According to another aspect of the present application, there is also provided a method for processing gear oil dedicated for vertical mill, the gear oil dedicated for vertical mill being the above gear oil dedicated for vertical mill, the method comprising the steps of:

s10, adding 40% -50% of composite base oil into a reaction kettle, stirring for 30min, and heating to 60-70 ℃;

s20, preparing 10% mother liquor from an antioxidant and a metal deactivator, adding the 10% mother liquor into a reaction kettle, and stirring and blending for 30-60 min;

s30, pouring the rest composite base oil into a reaction kettle, continuously stirring for 30min, and cooling the mixed oil in the reaction kettle to 50-60 ℃;

s40, maintaining the temperature of 50-60 ℃, sequentially adding the viscosity index improver, the antirust agent, the extreme pressure agent, the antiwear agent, the demulsifier and the oiliness agent into the reaction kettle, and circularly stirring for 3-4 hours;

s50 is filtered under the pressure of 0.1MPa to 0.2MPa, and the gear oil special for the vertical mill is obtained.

According to another aspect of the present application, there is also provided an apparatus for processing a gear oil dedicated for vertical mill, the gear oil dedicated for vertical mill being the gear oil dedicated for vertical mill described above, the apparatus comprising: the reaction kettle, the filter, the pump and the collecting container are connected in sequence.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

according to the technical scheme, the formula of the lubricating oil adopts base oil: 84.72 to 89.25 percent of base oil is the composition of 55 to 60 percent of III base oil and 40 to 45 percent of triphenyl phosphate according to the mass ratio. An antioxidant: 2.0 to 3.0 percent; metal deactivators: 0.02% -0.08%; viscosity index improver: 1.0 to 2.0 percent; extreme pressure agent: 3.0 to 4.0 percent; antiwear agent: 4.0 to 5.0 percent; rust inhibitor: 0.02% -0.12%; demulsifier: 0.05 to 0.08 percent; friction modifier: 0.66 to 1.0 percent. The lubricating oil with the components has higher kinematic viscosity and better bearing capacity, is suitable for vertical mill, and can effectively lubricate the vertical mill and reduce the abrasion of the vertical mill.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 shows a schematic diagram of a method of processing gear oil dedicated to vertical grinding according to the present application;

fig. 2 shows a schematic process structure of the apparatus for processing gear oil dedicated to a vertical mill according to the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In various forms of gear transmission, the teeth of the gear all pass from the beginning into engagement to the end of disengagement, and there are different forms of friction, namely sliding friction and rolling friction. Sliding friction is generated by inconsistent relative speeds of the engagement surfaces, and can generate certain reaction forces, and can cause abrasion of objects. Rolling friction is present when the relative speeds of the engaging tooth surfaces are equal, and can reduce the abrasion effect generated when friction, but cannot generate a sufficient reaction force.

Along with the development of scientific technology, the manufacturing technology of the gear transmission mechanism of the large vertical mill is continuously improved, and the requirements of gear manufacturing on parameters such as precision, bearing capacity and the like are also higher and higher. Gear transmission devices are gradually developed towards miniaturization, high power, heavy load, high torque, ultra-high speed and the like, and meanwhile, the use condition of the gear transmission is more and more harsh. For example, in metallurgical, mining, marine engineering, heavy chemical and extreme operating environments, gear trains are subjected to high temperatures, high humidity, random impact loads, dust, strong vibrations and extreme weather and geographical conditions for long periods of time, and gearboxes are often subjected to little moisture and water vapor infiltration. After the gear oil and the water in the gear box are mixed, when the gear is in a high-speed running condition, the gear oil is easy to generate the phenomenon of emulsification after severe vibration. When gear oil is circulated in the system, the gear oil cannot be rapidly demulsified and separated from oil in the gear box, and the emulsified gear oil can seriously influence the formation of a lubricating oil film, so that the gear is scratched, corroded and worn to a certain extent, and even seriously welded. Experiments and practices prove that the lubricating oil disclosed by the application has good anti-emulsifying, anti-corrosion and high-bearing capacity for the gear oil special for the large vertical mill.

Group III base oils have the advantages of low volatility, high viscosity index, excellent additive sensitivity, improved thermal and oxidative stability, and fuel economy. But also have some minor disadvantages, because of the low polar content, the solubility to the additives is somewhat poor. The application adopts triphenyl phosphate as a cosolvent to improve the solubility of the additive in the III base oil, thereby providing good performances of wear resistance, sealing expansion, metal passivation and the like.

In the technical scheme of the application, the metal deactivator is not used alone, is usually used together with the antioxidant in a compound way, has a synergistic effect, and can reduce the dosage of the antioxidant. The metal deactivation agent is compounded with N' -di-n-butylaminomethylene benzotriazole in 30-40 wt% and alkyl diphenylamine in 60-70 wt%, and has excellent antioxidant, copper corrosion inhibiting and metal deactivation performance. The compound use of the sulfur-phosphorus dioctyl alkali zinc salt and the phenol antioxidant has outstanding synergistic effect, and obviously improves the oxidation resistance of the gear oil of the speed reducer, so that the compound of the sulfur-phosphorus dioctyl alkali zinc salt with the mass ratio of 60% -70% and the 2, 6-di-tert-butyl-p-cresol with the mass ratio of 30% -40% is adopted as the antioxidant. The viscosity index improver adopts low molecular weight polyisobutene, is a non-volatile liquid with stable chemical property, and can not form residues after high-temperature volatilization or thermal decomposition. The extreme pressure agent adopts vulcanized lard oil and has the characteristics of low smell, high viscosity, thick oil film, high wear resistance and no corrosion. The antiwear agent is compounded by 50-60% of sulfurized isobutylene and 40-50% of di-n-butyl phosphite in mass ratio, and has the characteristics of good antiwear property, but has higher activity and more corrosion and abrasion. The application adds antirust agent to inhibit. The antirust agent adopts the combination of more than two of phosphate amine salt, alkenyl succinic acid, alkali dinonyl naphthalene sulfonate and petroleum sulfonate barium, and has the performances of penetrating rust removal, corrosion inhibition, metal protection and the like. The demulsifier is compounded by 40-50% of propylene oxide, 20-35% of condensate of amine and epoxy compound and 25-30% of polyether high molecular compound according to the mass ratio; has excellent demulsification performance and defoaming effect. The friction modifier adopts benzotriazole fatty amine salt, has multiple effects of oiliness, rust resistance, oxidation resistance and the like, can reduce friction and abrasion, can be compounded with sulfur-containing extreme pressure agents, and has good synergistic effect.

The application takes III base oil and triphenyl phosphate as the base oil of the special gear oil for the large-scale vertical mill, adopts an entropy weight fuzzy comprehensive evaluation method to purposefully perform the functions and characteristics of various functional additives, performs mathematical model simulation calculation and screening to obtain the additive usage amount with the optimal cost performance, and then puts the raw materials into a reaction kettle according to the method to finally obtain the special gear oil for the large-scale vertical mill.

Application of entropy weight fuzzy comprehensive evaluation method to gear oil formula optimization link

1. Establishing a feature matrix

The main aspect of the applicationFour separate indicators of flash point (opening)/deg.c, viscosity index, sintering load (PD)/N, and plaque diameter D (mm) were examined, and a total of 3 sets of tests were arranged by means of a orthonormal table. Thus, the feature matrix set x= (X _ij ) _3×4 The construction is as follows:

among the 4 index points, the flash point, the viscosity index and the sintering load are benefit type indexes, and the cost type index of the abrasive spot diameter is adopted;

(1) For the benefit index:

(2) For the cost index:in max (x) _ij )、min(x _ij ) Respectively represent x= (X) _ij ) _n×m And the maximum and minimum values of each element in the j-th column in the feature matrix, namely the maximum and minimum data of each scheme under the j-score index. Through the transformation, y is equal to or less than 0 _ij Less than or equal to 1 (i=1, 2, …, m), and the indexes of each class are homogenized into a forward index, the optimal value is 1, and the worst value is 0.

Obtaining a standardized matrix:

2. determination of entropy and entropy weight

From the formulaObtaining:

then from the formulaObtaining:

H＝(h ₁ h ₂ h ₃ h ₄ )＝(0.61248 0.57922 0.62365 0.51154)

3. calculating the weight of each index:

(d _j ＝1-h _j ) The method can obtain:

w＝(0.23162 0.25150 0.22494 0.29195)

4. constructing a fuzzy comprehensive judgment model

From the above Y and w, a fuzzy comprehensive judgment model is obtained by using a fuzzy mathematical theory as follows:

B＝wY ^T ＝(0.23162 0.87284 0.44790)

the obtained scheme corresponding to the maximum value element in the B is the optimal scheme, namely, the example 2 is the optimal scheme of the application.

The special gear oil for the vertical mill comprises the following components in percentage by mass: base oil: 84.72 to 89.25 percent of base oil is the composition of 55 to 60 percent of III base oil and 40 to 45 percent of triphenyl phosphate according to the mass ratio. An antioxidant: 2.0 to 3.0 percent. Metal deactivators: 0.02 to 0.08 percent. Viscosity index improver: 1.0 to 2.0 percent. Extreme pressure agent: 3.0 to 4.0 percent. Antiwear agent: 4.0 to 5.0 percent. Rust inhibitor: 0.02 to 0.12 percent. Demulsifier: 0.05 to 0.08 percent. Friction modifier: 0.66 to 1.0 percent.

In the technical scheme of the application, the extreme pressure agent is vulcanized lard; the friction modifier is benzotriazole fatty amine salt. The antioxidant is the composition of sulfur-phosphorus dioctyl basic zinc salt with the mass ratio of 60-70% and 2, 6-di-tert-butyl-p-cresol with the mass ratio of 30-40%. The metal deactivator is the composition of N' -di-n-butylaminomethylene benzotriazole in 30-40 wt% and alkyl diphenylamine in 60-70 wt%. The viscosity index improver is a polyisobutylene having a molecular weight of 1300. The antiwear agent is a composite of 50-60% of vulcanized isobutene and 40-50% of di-n-butyl phosphite by mass ratio. The antirust agent is a compound of any two or more of phosphate amine salt, alkenyl succinic acid, alkali barium dinonyl naphthalene sulfonate and barium petroleum sulfonate. The demulsifier is a composite of 40-50% of propylene oxide, 20-35% of condensate of amine and epoxy compound and 25-30% of polyether high molecular compound by mass ratio.

Example 1:

the composite material is prepared by blending the following raw material components in percentage by mass:

the sum of the components is 100 percent.

Example 1 preparation method:

(1) Weighing the components according to the proportion, adding 40% of composite base oil into a reaction kettle, stirring for 30min, and heating to 60 ℃; (2) Firstly, preparing a mother solution of 10% (m) by using an antioxidant and a metal deactivator, adding the mother solution into a reaction kettle, and stirring and blending for 30min; (3) Pouring the rest composite base oil into a reaction kettle, continuously stirring for 30min, and cooling the mixed oil in the reaction kettle to 50 ℃; (4) Maintaining 50 ℃, sequentially adding a viscosity index improver, an antirust agent, an extreme pressure agent, an antiwear agent, a demulsifier and an oiliness agent into a reaction kettle, and circularly stirring for 3 hours; (5) Finally, filtering is carried out under the pressure of 0.1MPa, and the gear oil special for the large-scale vertical mill can be obtained.

Example 2:

the sum of the components is 100 percent. The content of the file is mass percent.

Example 2 preparation method:

(1) Weighing the components according to the proportion, adding 45% of composite base oil into a reaction kettle, stirring for 30min, and heating to 65 ℃; (2) Firstly, preparing a mother solution of 10% (m) by using an antioxidant and a metal deactivator, adding the mother solution into a reaction kettle, and stirring and blending for 45min; (3) Pouring the rest composite base oil into a reaction kettle, continuously stirring for 30min, and cooling the mixed oil in the reaction kettle to 55 ℃; (4) Maintaining 55 ℃, sequentially adding a viscosity index improver, an antirust agent, an extreme pressure agent, an antiwear agent, a demulsifier and an oiliness agent into a reaction kettle, and circularly stirring for 3.5 hours; (5) Finally, filtering is carried out under the pressure of 0.15MPa, and the gear oil special for the large-scale vertical mill can be obtained.

Example 3:

the sum of the components is 100 percent.

Example 3 preparation method:

(1) Weighing the components according to the proportion, adding 50% of composite base oil into a reaction kettle, stirring for 30min, and heating to 70 ℃; (2) Firstly, preparing a mother solution of 10% (m) by using an antioxidant and a metal deactivator, adding the mother solution into a reaction kettle, and stirring and blending for 60min; (3) Pouring the rest composite base oil into a reaction kettle, continuously stirring for 30min, and cooling the mixed oil in the reaction kettle to 60 ℃; (4) Maintaining 60 ℃, sequentially adding a viscosity index improver, an antirust agent, an extreme pressure agent, an antiwear agent, a demulsifier and an oiliness agent into a reaction kettle, and circularly stirring for 4 hours; (5) Finally, filtering is carried out under the pressure of 0.2MPa, and the gear oil special for the large-scale vertical mill can be obtained.

Test examples

The special gear oil for the large vertical mill obtained in the examples 1-3 is subjected to performance detection, and a certain similar gear oil product is compared, and the results are shown in the following table:

as can be seen from the table: the application relates to an optimal scheme of a formula technology of an example 2 special gear oil for a large vertical mill.

The following tests were performed on example 2 and on a similar gear oil product:

1. the gear oil of example 2 was used for a comparative experiment with a similar gear oil product, and tested using an MM-200 abrasion tester. The upper sample is 45 steel, quenching treatment is carried out, and the hardness is 45HRC to 50HRC. The test piece was 45 steel, which was quenched to a hardness of 45HRC to 50HRC and a surface roughness Ra of 1.6nm. And after the two test pieces are ground for 1h, measuring the abrasion loss of the lower test piece. When the load is 240N, the abrasion loss of gear oil using a similar product is 0.42g; in contrast, when the gear oil of example 2 was used, the abrasion loss was only 0.20g, and the abrasion loss was reduced by 52.3%.

2. The two oil control experiments described above were still used. Experimental facilities: spiral bevel gear of vertical mill of a certain manufacturer; the mechanical efficiency was measured with a PC 20 1 mechanical efficiency meter. The gear oil of example 2 has a 3.24% improvement in mechanical efficiency over a similar gear oil product.

3. The two oil control experiments described above were still used. Experimental facilities: SRV reciprocating friction abrasion tester manufactured by Optimol corporation, germany. A test piece is arranged, wherein the diameter of the test piece is 7 mm; and (3) lower test piece, namely SKH high-speed steel. The experimental time was 5000sec. The bite time of a similar gear oil product was 2138sec when the load was 50N, but was reduced to 280sec when the gear oil of example 2 was used, and the wear scar depth was reduced from 4.64u m to 3.87um.

The physicochemical indexes of the oil product in the embodiment 2 of the application all reach Q/45022GLHC 001-2020, the special gear oil for milling equipment enterprise standard, and the typical physicochemical indexes are as follows:

as shown in fig. 1, the application provides a method for processing gear oil special for vertical mill, wherein the gear oil special for vertical mill is the gear oil special for vertical mill, and the method comprises the following steps: s10, adding 40% -50% of composite base oil into a reaction kettle, stirring for 30min, and heating to 60-70 ℃. S20, adding 10% mother liquor prepared from the antioxidant and the metal deactivator into a reaction kettle, and stirring and blending for 30-60 min. S30, pouring the rest composite base oil into a reaction kettle, continuously stirring for 30min, and cooling the mixed oil in the reaction kettle to 50-60 ℃. S40, maintaining the temperature at 50-60 ℃, sequentially adding the viscosity index improver, the antirust agent, the extreme pressure agent, the antiwear agent, the demulsifier and the oiliness agent into the reaction kettle, and circularly stirring for 3-4 hours. S50, filtering under the pressure of 0.1MPa to 0.2MPa to obtain the gear oil special for the vertical mill. The blending method is simple to operate, low in automation level and free from the influence of fluctuation of the oil quality of the distillate components of the device, and most of oil refineries currently adopt the blending method. It should be noted that, the formula optimization of the gear oil is performed by adopting the entropy weight fuzzy comprehensive evaluation method before the step S10, so that the number of experiments can be greatly reduced, the time is saved, the cost is reduced, and the specific evaluation method is described above and is not repeated here.

As shown in fig. 2, the present application also provides a device for processing gear oil dedicated for vertical mill, the gear oil dedicated for vertical mill is the gear oil dedicated for vertical mill, the device includes: the reaction vessel 10, the filter 20, the pump 30 and the collection vessel 40 are connected in this order.

The special gear oil for the large vertical mill has the remarkable advantages that:

has good extreme pressure abrasion resistance, oxidation resistance, corrosion resistance, thermal oxidation stability and emulsification resistance;

the unique extreme pressure agent and antiwear agent can reduce tooth surface scratch, effectively reduce running noise and ensure smooth running of the gear under the working condition of heavy load or impact load;

the use of triphenyl phosphate can improve the solubility of the additive in group III base oils;

proper adhesiveness and extremely low friction coefficient, can effectively reduce the temperature of a machine body generated when a speed reducer gear runs, and reduce energy consumption. The heat stability is good, the oxidation resistance is outstanding, and the generation of various harmful oxides and oil sludge can be reduced;

under the conditions that all performances are excellent, and the normal operation of the large vertical mill is ensured, the service life of the oil product can be greatly prolonged, the oil change frequency is reduced, the enterprise cost is saved, and the profit margin is improved.

It should be noted that in this document, relational terms such as "first" and "second" and the like are 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. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The processing method of the gear oil special for the vertical mill is characterized by comprising the following steps of:

s40, maintaining the temperature at 50-60 ℃, sequentially adding the viscosity index improver, the antirust agent, the extreme pressure agent, the antiwear agent, the demulsifier and the oiliness agent into the reaction kettle, and circularly stirring for 3-4 hours;

s50, filtering under the pressure of 0.1-0.2 MPa to obtain gear oil special for the vertical mill;

the method also comprises the following steps of adopting an entropy weight fuzzy comprehensive evaluation method to conduct formula optimization of the gear oil before the step S10;

the gear oil special for the vertical mill comprises the following components in percentage by mass:

the viscosity index improver is polyisobutylene having a molecular weight of 1300;

the entropy weight fuzzy comprehensive evaluation method is adopted to pertinently perform the functions and characteristics of various functional additives, and perform mathematical model simulation calculation and screening to obtain the additive usage amount with optimal cost performance;

the first step: feature matrix set x= (X) _ij ) _3×4 The construction is as follows:

(1) For the benefit index:

(2) For the cost index:

in max (x) _ij )、min(x _ij ) Respectively represent x= (X) _ij ) _n×m The maximum and minimum values of each element in the j-th column in the feature matrix, namely the maximum and minimum data of each scheme under the j-score index; through the transformation, y is equal to or less than 0 _ij Less than or equal to 1 (i=1, 2, …, m), and the indexes of each class are homogenized into a forward index, the optimal value is 1, and the worst value is 0;

obtaining a standardized matrix:

second, determination of entropy and entropy weight

From the formulaObtaining:

then from the formulaObtaining:

H＝(h ₁ h ₂ h ₃ h ₄ )＝(0.61248 0.57922 0.62365 0.51154)

thirdly, calculating the weight of each index:

(d _j ＝1-h _j ) The method can obtain:

w＝(0.23162 0.25150 0.22494 0.29195)

fourth, constructing a fuzzy comprehensive judgment model

B＝wY ^T ＝(0.23162 0.87284 0.44790)。