Gearbox oil composition with effect of inhibiting temperature rise

Abstract

The invention provides a gearbox oil composition with a temperature rise inhibiting effect. The gearbox oil composition comprises the following components in parts by weight: 1-5 parts of an anti-scratch agent; 1.0 to 3.5 parts of an anti-wear reagent at extreme pressure; 0.2 to 2.5 parts of an antifriction additive; 0.04 to 0.15 part of a metal deactivator; 0.02 to 0.1 part of an antirust agent; 0.1 to 0.3 part of an ashless dispersant; 0 to 0.05 part of an anti-foaming agent; 2-8 parts of a viscosity index improver; the lubricating oil composition is prepared from the following components in parts by weight: 5 to 15 parts of ester oil, 2 to 10 parts of HVIS150BS, and 88.64 to 55.35 parts of PAO6 and PAO40. The gear box oil composition with the temperature rise inhibiting effect has the beneficial effects that the gear box oil composition with the temperature rise inhibiting effect simultaneously has scratch resistance, abrasion resistance, bearing capacity, friction reduction and corrosion resistance, can inhibit the temperature rise of oil products, and is suitable for lubricating gear boxes of equipment such as high-speed rails and the like with relatively high temperature rise inhibiting requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of lubrication, and in particular relates to a gearbox oil composition. Background Art

[0002] Gear transmission is the most common mechanical transmission method. When the gears transmit power, they generate heat due to meshing friction. This heat is mainly dissipated through the gear oil, the lubricating medium of the gears. The transmission gears of ordinary industrial equipment generate less heat, but the transmission gears of some equipment with fast running speed and heavy load generate more heat, such as high-speed rail and wind turbines.

[0004] In order to further enhance the international competitiveness of my country's rail transit equipment technology, it is necessary to overcome technical difficulties such as temperature rise and abnormal wear of high-speed rail gear transmission systems with speeds of 400 kilometers per hour and above.

[0005] As the lubricating medium of high-speed rail gearboxes, high-speed rail gear oil not only prevents gear wear, but also plays a role in heat dissipation and temperature reduction. As the speed of high-speed rail continues to increase, the heat generated by gear meshing and oil agitation is increasing, causing the temperature of gear oil to continue to rise. Excessive oil temperature will cause the train to trigger the protection device, causing the train to slow down and disrupt normal driving order. Summary of the invention

[0006] In view of this, the present invention aims to propose a gearbox oil composition with the function of inhibiting temperature rise. The gearbox oil composition with the function of inhibiting temperature rise provided by the present invention has anti-abrasion, anti-wear, load-bearing, friction reduction and cooling, and corrosion resistance. It is suitable for the lubrication of equipment such as high-speed rail gearboxes that have high requirements for inhibiting temperature rise.

[0007] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0008] The first aspect of the present invention provides a gearbox oil composition with the function of inhibiting temperature rise, characterized in that the gearbox oil composition with the function of inhibiting temperature rise comprises, by weight, 1.0-5.0 parts of an anti-scuffing agent, 1.0-3.5 parts of an extreme pressure anti-wear agent, 0.2-2.5 parts of a friction reducer, 0.04-0.15 parts of a metal deactivator, 0.02-0.15 parts of a rust inhibitor, 0.1-0.3 parts of an ashless dispersant, 0-0.05 parts of an anti-foaming agent, 2-8 parts of a viscosity index improver, 5-15 parts of an ester oil, 2-10 parts of HVIS150BS (a type of deeply refined mineral oil), and 88.64-55.35 parts of PAO6 and PAO40 base oils.

[0009] Preferably, the gearbox oil composition with the effect of inhibiting temperature rise comprises, by weight, 2.5-4.0 parts of anti-scuffing agent, 2.0-3.0 parts of extreme pressure anti-wear agent, 0.5-2.0 parts of friction reducer, 0.08-0.12 parts of metal deactivator, 0.02-0.08 parts of rust inhibitor, 0.12-0.20 parts of ashless dispersant, 0-0.03 parts of anti-foaming agent, 3-6 parts of viscosity index improver, 7-12 parts of ester oil, 5-10 parts of HVIS150BS, and 79.78-62.57 parts of PAO6 and PAO40 base oil.

[0010] More preferably, the gearbox oil composition with the effect of inhibiting temperature rise comprises, by weight, 3.35-3.65 parts of anti-scuffing agent, 2.06-2.46 parts of extreme pressure anti-wear agent, 1.0-1.30 parts of friction reducer, 0.08-0.10 parts of metal deactivator, 0.05-0.08 parts of rust inhibitor, 0.12-0.18 parts of ashless dispersant, 0.03-0.05 parts of anti-foaming agent, 5-6 parts of viscosity index improver, 9-10 parts of ester oil, 5-8 parts of HVIS150BS (a type of deeply refined mineral oil), and 73.59-68.90 parts of PAO6 and PAO40 base oils.

[0011] The second aspect of the present invention provides a gearbox oil composition with the function of inhibiting temperature rise, characterized in that the gearbox oil composition with the function of inhibiting temperature rise comprises, by mass percentage, 1.0-5.0% of anti-scuffing agent, 1.0-3.5% of extreme pressure anti-wear agent, 0.2-2.5% of friction reducer, 0.04-0.15% of metal deactivator, 0.02-0.15% of rust inhibitor, 0.1-0.3% of ashless dispersant, 0-0.05% of anti-foaming agent, 2-8% of viscosity index improver, 5-15% of ester oil, 2-10% of HVIS150BS, and the remainder of PAO6 and PAO40 base oil (preferably, 5-18% of PAO40 and the remainder of PAO6).

[0012] Preferably, the gearbox oil composition with the effect of inhibiting temperature rise comprises, by weight, 2.5-4.0% of anti-scuffing agent, 2.0-3.0% of extreme pressure anti-wear agent, 0.5-2.0% of friction reducer, 0.08-0.12% of metal deactivator, 0.02-0.08% of rust inhibitor, 0.12-0.20% of ashless dispersant, 0-0.03% of anti-foaming agent, 3-6% of viscosity index improver, 7-12% of ester oil, 5-10% of HVIS150BS, and the remainder of PAO6 and PAO40 base oil (preferably, 9-15% of PAO40 and the remainder of PAO6).

[0013] More preferably, the gearbox oil composition with the effect of inhibiting temperature rise comprises, by weight, 3.35-3.65% of anti-scuffing agent, 2.06-2.46% of extreme pressure anti-wear agent, 1.0-1.30% of friction reducer, 0.08-0.10% of metal deactivator, 0.05-0.08% of rust inhibitor, 0.12-0.18% of ashless dispersant, 0.03-0.05% of anti-foaming agent, 5-6% of viscosity index improver, 9-10% of ester oil, 5-8% of HVIS150BS, and the remainder of PAO6 and PAO40 base oil (preferably, 10-13.59% of PAO40 and the remainder of PAO6).

[0014] According to the gearbox oil composition of the first aspect or the second aspect of the present invention, preferably, the anti-scuffing agent comprises one or a combination of at least two of sulfided isobutylene, alkyl polysulfide (preferably, di-tert-alkyl polysulfide), and benzyl polysulfide. For example, sulfided isobutylene and alkyl polysulfide; alkyl polysulfide and benzyl polysulfide, etc., but not limited to the above-listed combinations, and other combinations not listed within the above-listed combination range are also applicable.

[0015] According to the gearbox oil composition described in the first aspect or the second aspect of the present invention, preferably, the extreme pressure anti-wear agent includes any one or a combination of at least two of acidic phosphate octadecylamine salt, dispersant and acidic phosphate amine salt synthesis product, alkoxy phosphate, and triphenyl thiophosphate. For example, acidic phosphate amine salt and dispersant and acidic phosphate amine salt reactant; alkoxy phosphate and triphenyl thiophosphate; acidic phosphate amine salt, alkoxy phosphate and triphenyl thiophosphate, etc. However, it is not limited to the above-listed combinations, and other combinations not listed within the above-listed combination range are also applicable.

[0016] More preferably, the synthetic product of the dispersant and the acidic phosphate amine salt is QT301, and the preparation method thereof comprises the following steps:

[0017] 1) Take a three-necked flask, add a certain amount of phosphorus pentoxide into an organic solvent, and stir to make it evenly dispersed;

[0018] 2) Add a certain amount of isooctyl alcohol dropwise under stirring, and control the temperature of the reaction liquid below 40°C during the addition. After the addition is completed, heat the temperature to 72-75°C to obtain an intermediate product;

[0019] 3) After cooling the intermediate product, a certain amount of polyisobutylene bissuccinimide (T152) and dodecylamine are added, and then the temperature is raised to 90-94°C for reaction;

[0020] 4) After the organic solvent is removed by distillation, QT301 is obtained.

[0021] Wherein, preferably, the organic solvent comprises petroleum ether (boiling range 90-120° C.);

[0022] Wherein, preferably, the stirring time in step 1) is 2-4 minutes (more preferably, 3 minutes);

[0023] Wherein, preferably, the intermediate product in step 2) is an acidic phosphate; the reaction time in step 2) is 3-5 hours (more preferably, 4 hours);

[0024] Preferably, the reaction time in step 3) is 2-4 hours (more preferably, 3 hours).

[0025] According to the gearbox oil composition of the first aspect or the second aspect of the present invention, preferably, the friction reducer comprises any one or a combination of two of non-sulfur phosphorus organic molybdenum, nitrogen-containing borate, and organic antimony. For example, non-sulfur phosphorus organic molybdenum and nitrogen-containing borate, non-sulfur phosphorus organic molybdenum and organic antimony, etc. However, it is not limited to the above-listed combinations, and other combinations not listed within the above-listed combination range are also applicable.

[0026] More preferably, the non-sulfur-phosphorus organic molybdenum is QT403, and its preparation method comprises the following steps:

[0027] 1) In a three-necked flask, a long-chain unsaturated acid chloride and pyridine are dissolved in a first organic solvent, and diethanolamine is added dropwise to the reaction system at 20-30° C. while stirring. After the addition is completed, the temperature is maintained at 20-30° C. and the reaction is continued until the raw materials are completely reacted. The reaction solution is filtered, the organic phase is washed with a buffer solution, stripped with ethyl acetate, dried, and the solvent is removed by rotary evaporation to obtain a long-chain unsaturated amide.

[0028] 2) Dissolve the long-chain unsaturated amide in a second organic solvent, add a certain amount of catalyst, control the temperature at 90-120° C., dropwise add an aqueous solution of ammonium molybdate into the reaction system while stirring, then reflux the reaction at 60-120° C., filter, and remove the solvent by reduced pressure distillation to obtain QT403.

[0029] Wherein, preferably, the first organic solvent comprises petroleum ether (boiling range 90-120° C.);

[0030] Wherein, preferably, the buffer solution in step 1) comprises sodium bicarbonate (more preferably, the mass percentage concentration of sodium bicarbonate is 15%);

[0031] Wherein, preferably, the reaction time in step 1) is 4-5 hours;

[0032] Wherein, preferably, the second organic solvent comprises N,N-dimethylformamide;

[0033] Preferably, the reaction time in step 2) is 7-8 hours.

[0034] According to the gearbox oil composition of the first aspect or the second aspect of the present invention, preferably, the metal deactivator comprises any one or a combination of at least two of benzotriazole derivatives. For example, benzotriazole octadecylamine salt; a combination of benzotriazole octadecylamine salt and N,N-di-n-butylaminomethylenebenzotriazole, etc. However, it is not limited to the above-listed combinations, and other combinations not listed within the above-listed combination range are also applicable.

[0035] According to the gearbox oil composition of the first aspect or the second aspect of the present invention, preferably, the rust inhibitor comprises overbased calcium sulfonate.

[0036] According to the gearbox oil composition of the first aspect or the second aspect of the present invention, preferably, the ashless dispersant comprises high molecular weight polyisobutylene succinimide.

[0037] According to the gearbox oil composition of the first aspect or the second aspect of the present invention, preferably, the antifoaming agent comprises one or a combination of two of a silicon-based antifoaming agent, a non-silicon-based antifoaming agent, and a composite antifoaming agent. For example, a combination of a silicon-based antifoaming agent and a non-silicon-based antifoaming agent; a combination of a non-silicon-based antifoaming agent and a composite antifoaming agent, etc. However, it is not limited to the above-listed combinations, and other combinations not listed within the above-listed combination range are also applicable.

[0038] According to the gearbox oil composition of the first aspect or the second aspect of the present invention, preferably, the viscosity index improver comprises polymethacrylate.

[0039] According to the gearbox oil composition described in the first aspect or the second aspect of the present invention, preferably, the ester oil includes polyol esters (preferably, pentaerythritol fatty acid esters, trimethylolpropane octanedioate) and / or diesters (preferably, diisononyl sebacate, diisodecyl adipate).

[0040] The third aspect of the present invention also provides use of the gearbox oil composition according to the first aspect or the second aspect of the present invention in the preparation of gear lubricating oil.

[0041] Compared with the prior art, the gearbox oil composition with the function of suppressing temperature rise described in the present invention has the following advantages:

[0042] The present invention provides a gearbox oil composition with the function of suppressing temperature rise. Through the coordination and interaction of various raw materials, the product has the capabilities of anti-scratch, anti-wear, load-bearing, friction reduction and temperature reduction, and corrosion resistance. The product is suitable for lubrication of equipment with high requirements for suppressing temperature rise, such as high-speed rail gearboxes.

[0043] The present invention uses a self-made non-sulfur-phosphorus organic molybdenum friction reducing additive QT403 and an organic antimony friction reducing additive to make the composition have the effect of reducing friction and inhibiting temperature rise, and uses a self-made QT301 phosphorus-containing extreme pressure anti-wear agent and other extreme pressure anti-wear agents to make the composition have load-bearing and anti-wear properties, thereby reducing meshing wear and playing a role in reducing friction temperature rise. Through the combined effect of the above two aspects, the invented composition achieves a significant decrease (more than 10°C) in the thermal equilibrium temperature of the friction temperature rise of the existing high-speed rail gear oil of the same viscosity level. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0045] Figure 1 : Thermal equilibrium temperature of temperature rise test for different oil products in temperature rise test 1.

[0046] Figure 2 : Thermal equilibrium temperature of temperature rise test for different oil products in temperature rise test 2. DETAILED DESCRIPTION

[0047] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0048] The present invention will be described in detail below with reference to examples.

[0049] In the following examples, sulfided isobutylene (dialkyl tetrasulfide) was purchased from Shenyang Guangda Chemical Co., Ltd., code T321; di-tert-alkyl polysulfide was purchased from Hangzhou Shitan Chemical Co., Ltd., code TPS32. Alkoxy phosphate was purchased from Shenyang Hualun Lubricant Additive Co., Ltd., code P120; acid phosphate ester octadecylamine salt was purchased from Shenyang Hualun Lubricant Additive Co., Ltd., code T308; dispersant and acid phosphate amine salt synthesis product (self-made), code QT301; triphenyl thiophosphate was purchased from Jinzhou Shengda Chemical Co., Ltd., code T309. Non-sulfur phosphorus organic molybdenum friction reducing additive (self-made), code QT403; nitrogen-containing borate was purchased from Suzhou Jinmo Runcheng Lubrication Technology Co., Ltd., code GM1011; organic antimony (dialkyl antimony dithiophosphate) was purchased from Vanderbilt, code V622. Domestic organic antimony (antimony dialkyl dithiocarbamate) was purchased from Kelong Chemical Glass Instrument Supply Station, Weibin District, Baoji City, code HL622. N, N-di-n-butylaminomethylene benzotriazole was purchased from Zibo Huihua Petroleum Additives Co., Ltd., code T551; benzotriazole derivatives were purchased from Changsha Wangcheng Petrochemical Co., Ltd., code T553; ​​benzotriazole octadecylamine salt was purchased from Jinzhou Xinxing Petroleum Additives Co., Ltd., code T406E. Polyisobutylene succinimide was purchased from Xinxiang Ruifeng New Materials Co., Ltd., code RF1161H. High base calcium sulfonate was purchased from Xinxiang Ruifeng New Materials Co., Ltd., code RF1106D. Silicone antifoaming agent was purchased from Jinzhou Xinxing Petroleum Additives Co., Ltd., code T903; composite antifoaming agent was purchased from Jinzhou Shengda Chemical Co., Ltd., code T921; composite antifoaming agent was purchased from Germany Mengqingxin Company, code 155. Polymethacrylate was purchased from Dalian Xinyi Industry New Materials Development Co., Ltd., code name V6520. Fatty acid pentaerythritol ester was purchased from Croda Company, code name 3970; PAO6 and PAO40 base oils were purchased from Mobil; Class I deep refined mineral oil was purchased from Suzhou Zhuxin Industrial Lubricant Co., Ltd., code name HVIS150BS.

[0050] The process of synthesizing the product QT301 from the self-made dispersant and acidic phosphate amine salt is as follows:

[0051] 1) Take a 500ml three-necked flask, add a certain amount of phosphorus pentoxide into 100ml petroleum ether (boiling range 90-120℃) solvent, and stir to make it evenly dispersed (about 3 minutes);

[0052] 2) Add a certain amount of isooctyl alcohol using a dropping funnel under stirring, and control the temperature of the reaction liquid below 40°C during the addition. After the addition is completed, heat the mixture to 72-75°C and react for 4 hours to obtain an intermediate product (acidic phosphate);

[0053] 3) After cooling the intermediate product, a certain amount of T152 (polyisobutylene bissuccinimide) and dodecylamine were added, and then the temperature was raised to 90-94° C. for reaction for 3 hours;

[0054] 4) After distilling off the petroleum ether solvent, QT301 is obtained.

[0055] The process of making the self-made non-sulfur-phosphorus organic molybdenum friction reducing additive QT403 is as follows:

[0056] 1) Dissolve the long-chain unsaturated acid chloride and pyridine in petroleum ether (boiling range 90-120° C.) in a three-necked flask, add diethanolamine dropwise to the reaction system at 20-30° C. while stirring, and continue to react for 4-5 hours at 20-30° C. until the raw materials are completely reacted after the addition is completed. Filter the reaction solution, wash the organic phase with a buffer solution (15% sodium bicarbonate), extract with ethyl acetate, dry with anhydrous magnesium sulfate, and remove the solvent by rotary evaporation to obtain a long-chain unsaturated amide.

[0057] 2) Dissolve the long-chain unsaturated amide in an organic solvent (N,N-dimethylformamide), add a certain amount of catalyst (triethylamine), control the temperature at 90-120°C, dropwise add an aqueous solution of ammonium molybdate into the reaction system while stirring, then reflux at 60-120°C for 7-8 hours, filter, and remove the solvent by distillation under reduced pressure to obtain QT403.

[0058] Example 1

[0059] This embodiment provides a gearbox oil composition having the function of suppressing temperature rise, and the specific composition is as follows (in mass percentage):

[0060] Anti-scuffing agent (T321) 3.35%, extreme pressure and anti-wear agent (1.0% QT301, 0.3% T308, 0.36% T309, 0.8% P120) 2.46%, friction reducing additive (0.8% QT403, 0.5% V622) 1.30%, metal deactivator (0.05% T553, 0.05% T406E) 0.10%, ashless dispersant (RF1161H) 0.12%, rust inhibitor (RF1106D) 0.05%, anti-foaming agent (155) 0.03%, viscosity index improver (V6520) 5%, ester oil (3970) 9%, HVIS150BS 5%, PAO (61.61% PAO6 and 11.98% PAO40) 73.59%.

[0061] The preparation method is as follows:

[0062] The above raw materials are mixed (solid additives and a small amount of additives are added first, then a large amount of additives are added, and finally the base oil is added), the temperature is raised to 66° C. and stirred for 1.5 hours to obtain the gearbox oil with good temperature rise inhibition effect.

[0063] Example 2

[0064] This embodiment provides a gearbox oil composition having the function of suppressing temperature rise, and the specific composition is as follows (in mass percentage):

[0065] Anti-scuffing agent (TPS32) 3.65%, extreme pressure and anti-wear agent (0.8% QT301, 0.8% P120, 0.1% T308, 0.36% T309) 2.06%, friction reducing additive (0.5% QT403, 0.5% GM1011) 1.0%, metal deactivator (0.05% T551, 0.03% T406E) 0.08%, ashless dispersant (RF1161H) 0.18%, rust inhibitor (RF1106D) 0.08%, anti-foaming agent (T921, T903) 0.05%, viscosity index improver (V6520) 6%, ester oil (3970) 10%, HVIS150BS 8%, 68.9% PAO (58.9% PAO6 and 10% PAO40).

[0066] The preparation method is similar to that of Example 1.

[0067] Implementation 3

[0068] This embodiment provides a gearbox oil composition having the function of suppressing temperature rise, and the specific composition is as follows (in mass percentage):

[0069] Anti-scuffing agent (T321) 3.35%, extreme pressure and anti-wear agent (1.0% QT301, 0.3% T308, 0.36% T309, 0.8% P120) 2.46%, friction reducing additive (0.8% QT403, 0.5% HL622) 1.30%, metal deactivator (T406E) 0.10%, ashless dispersant (RF1161H) 0.12%, rust inhibitor (RF1106D) 0.05%, anti-foaming agent (155) 0.03%, viscosity index improver (V6520) 5%, ester oil (3970) 9%, HVIS150BS 5%, PAO (60% PAO6 and 13.59% PAO40) 73.59%.

[0070] The preparation method is similar to that of Example 1.

[0071] In order to evaluate the performance of the present invention, the currently used high-speed railway gear oil (BASF 75W / 80) and the gear oil composition with similar temperature rise inhibition effect in the applicant's prior patent CN116083150B were used as comparative examples 1 and 2, respectively.

[0072] Comparative Example 2:

[0073] Anti-scuffing agent (isobutylene tetrasulfide) 1.5%, extreme pressure anti-wear agent (containing monoolefin succinimide phosphate dodecylamine salt, acidic phosphate octadecylamine salt, triphenyl thiophosphate 0.5% each) 1.5%, metal deactivator (benzotriazole octadecylamine salt, 2,5-bis(tert-nonyldisulfide)-1,3,4-thiadiazole 0.06% each) 0.12%, detergent (medium base value calcium sulfonate) 0.13%, ashless dispersant (polymer polyisobutylene succinimide) 0.2%, antioxidant (octyl / butyl diphenylamine) 0.6%, viscosity index improver (polymethacrylate) 9%, ester oil (fatty acid pentaerythritol) 10%, base oil (PAO base oil) balance.

[0074] Comparison of main performances between the embodiment and the comparative example:

[0075] The main properties of the embodiments and comparative examples were investigated, including anti-scratch, anti-wear, load-bearing, anti-corrosion and temperature rise suppression performance.

[0076] The temperature rise suppression test was carried out on the MS-10A four-ball friction testing machine produced by Xiamen Tianji Automation Company: the test load was 784N, the test speed was 2000r / min, the test steel ball was GCr15 steel ball (diameter 12.7mm), hardness (58-62) HRC, and the laboratory temperature was controlled between 23.2-23.5℃ by air conditioning.

[0077] Clamp three steel balls cleaned with petroleum ether in an oil box, pour the test oil to immerse the three steel balls, place another steel ball on top of the three balls, and apply a load of 784N. After the test oil is heated to 40℃, stop heating, start the equipment, record the equipment running time at a certain temperature interval, and stop the test when thermal equilibrium is reached and the temperature no longer rises (the temperature remains unchanged within 2 minutes). The lower the thermal equilibrium temperature, the stronger the oil's ability to reduce friction and cool down.

[0078] The specific results are shown in Tables 1 and 2.

[0079] Table 1 Main properties of the implementation examples and comparative examples

[0080]

[0081]

[0082] From the results in Table 1, it can be seen that the anti-wear performance (wear spot diameter) and friction reduction performance (average friction coefficient) of the embodiment are better than those of the comparative example 1, indicating that the lubricating oil composition of the present invention has good friction reduction and anti-wear performance and is suitable for lubrication of high-speed high-speed rail gearboxes. The comparative example 2 is mainly used for lubrication of the transmission system of new energy passenger vehicles, so its kinematic viscosity at 100°C is low, and its load-bearing and anti-sintering capabilities are poor.

[0083] Table 2 Friction temperature rise test results of the embodiment and the comparative example

[0084]

[0085] From the results in Table 2, it can be seen that the comparative example cannot complete the test and the temperature rise is fast. The examples can complete the test, among which the thermal equilibrium temperature of Example 3 is the lowest. The above test results show that the additive selected by the present invention has good performance and obvious effect of inhibiting temperature rise.

[0086] The implementation examples and the comparative examples were subjected to a temperature rise test on a transmission test bench (the test equipment was a new energy vehicle reducer test bench).

[0087] Temperature rise test 1: speed 6000r / min, torque 80N·m, motor power 45kW, single-stage gear transmission, speed ratio 9.599, ambient temperature 28.3℃-31.4℃.

[0088] Use the test oil sample to flush the gearbox, then add 1.8 liters of test oil. Start the machine, gradually increase the torque to 80N·m, start timing when the oil temperature reaches 45℃, record the oil temperature at regular intervals, and stop the test when the thermal equilibrium temperature is reached (temperature rise does not exceed 2℃ within 10 minutes). See the results. Figure 1 The results show that the thermal equilibrium temperature of Comparative Example 2 is the highest, and the thermal equilibrium temperature of Implementation Example 3 is the lowest, and the cooling effect is the most significant.

[0089] Temperature rise test 2: speed 9000r / min, torque 53N·m, motor power 45kW, single-stage gear transmission, speed ratio 9.599, ambient temperature 29.5℃-31.2℃.

[0090] Use the test oil sample to flush the gearbox, then add 1.8 liters of test oil. Start the machine, gradually increase the torque to 53N·m, start timing when the oil temperature reaches 45℃, record the oil temperature at regular intervals, and stop the test when the thermal equilibrium temperature is reached (temperature rise does not exceed 2℃ within 10 minutes). See the results. Figure 2 The results show that: Example 2 has the highest thermal equilibrium temperature, while Example 3 has the lowest thermal equilibrium temperature, and the cooling effect is the most significant.

[0091] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate a gearbox oil composition having the function of suppressing temperature rise, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of various raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0092] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0093] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gearbox oil composition having a temperature rise suppressing effect, characterized in that: In parts by weight:

2. The gearbox oil composition according to claim 1, characterized in that: In parts by weight:

3. The gearbox oil composition according to claim 1 or 2, characterized in that: The anti-scratch agent includes one or more of sulfided isobutylene, alkyl polysulfide, and benzyl polysulfide.

4. The gearbox oil composition according to claim 1 or 2, characterized in that: The extreme pressure anti-wear agent comprises one or more of acidic phosphate octadecylamine salt, a dispersant and a synthetic product of acidic phosphate amine salt, alkoxy phosphate, and triphenyl thiophosphate.

5. The gearbox oil composition according to claim 1 or 2, characterized in that: The friction reducing additive includes one or two of non-sulfur-phosphorus organic molybdenum, nitrogen-containing borate, and organic antimony.

6. The gearbox oil composition according to claim 1 or 2, characterized in that: The metal deactivator includes one or more benzotriazole derivatives. Preferably, the benzotriazole derivatives include benzotriazole octadecylamine salt and N,N-di-n-butylaminomethylenebenzotriazole.

7. The gearbox oil composition according to claim 1 or 2, characterized in that: The rust inhibitor includes overbased calcium sulfonate.

8. The gearbox oil composition according to claim 1 or 2, characterized in that: The ashless dispersant includes high molecular weight polyisobutylene succinimide.

9. The gearbox oil composition according to claim 1 or 2, characterized in that: The antifoaming agent includes one or more of a silicon-based antifoaming agent, a non-silicon-based antifoaming agent, and a composite antifoaming agent.

10. The gearbox oil composition according to claim 1 or 2, characterized in that: The viscosity index improver includes a polymethacrylate type viscosity index improver.

11. The gearbox oil composition according to claim 1 or 2, characterized in that: The ester oil includes polyol esters and / or diesters.

12. Use of the gearbox oil composition according to any one of claims 1 to 11 in the preparation of gear lubricating oil.

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