Hydraulic tank-gearbox universal lubricating oil composition and preparation method thereof

Abstract

The invention discloses a universal lubricating oil composition for a hydraulic tank and a gearbox. The universal lubricating oil composition comprises the following components: 0.5 to 5.0 percent of antioxidant, 0.5 to 2.0 percent of antiwear agent, 0.02 to 2.0 percent of friction modifier, 0.02 to 1.0 percent of metal deactivator, 0.05 to 0.2 percent of antirust agent, 0.1 to 2.0 percent of pour point depressant, 0.001 to 0.06 percent of defoaming agent, 0.001 to 0.05 percent of demulsifier and the balance of base oil. The preparation method comprises the following steps: mixing and stirring the base oil, the antioxidant, the antiwear agent, the friction modifier, the metal deactivator, the antirust agent and the pour point depressant, adding the defoaming agent and the demulsifier, stirring, cooling and filtering. The lubricating oil composition disclosed by the invention has excellent extreme pressure anti-wear property, thermal oxidation stability, rust and corrosion resistance, demulsibility and anti-foaming property, can meet the harsh requirements of a hydraulic system on filterability and rust and corrosion resistance, and can meet the extreme pressure anti-wear requirement of a transmission system.

Description

Technical Field

[0001] The invention belongs to the technical field of lubricating oil additives, and in particular relates to a hydraulic box-gear box universal lubricating oil composition, and also relates to a preparation method of the lubricating oil composition. Background Art

[0002] The mineral processing hydraulic system is connected to the power crankcase, but in order to meet the lubrication needs of different equipment, they need to be lubricated separately. Due to the long-term use of the hydraulic system, inevitable equipment wear occurs, resulting in the leakage and mixing of the industrial gear oil in the power end crankcase and the anti-wear hydraulic oil in the hydraulic chamber, causing aggravated wear and insufficient lubrication. The hydraulic box-gearbox universal lubricant takes into account the oil requirements of the gearbox and the hydraulic system, has good anti-emulsification, filterability, thermal oxidation stability, sealing adaptability, and excellent extreme pressure and anti-wear properties, ensuring the smooth and safe operation of the equipment. At present, there is no universal lubricant for hydraulic box-gearbox in OEM equipment, and they are all lubricated separately. Therefore, the development and production of universal lubricants will further improve the industrial lubricant production line. Summary of the invention

[0003] An object of the present invention is to provide a hydraulic box-gear box universal lubricating oil composition having excellent anti-emulsification properties and extreme pressure anti-wear properties.

[0004] Another object of the present invention is to provide a method for preparing a hydraulic box-gear box universal lubricating oil composition.

[0005] The technical solution adopted by the present invention is that the hydraulic box-gear box universal lubricating oil composition comprises the following components by mass percentage: 0.5% to 5.0% antioxidant, 0.5% to 2.0% antiwear agent, 0.02% to 2.0% friction modifier, 0.02% to 1.0% metal passivator, 0.05% to 0.2% rust inhibitor, 0.1% to 2.0% pour point depressant, 0.001% to 0.06% defoamer, 0.001% to 0.05% demulsifier, and the balance is base oil, and the sum of the mass percentages of the above components is 100%.

[0006] The present invention is also characterized in that:

[0007] The base oil is any one of Group I mineral oil and Group II hydrogenated base oil, Group II hydrogenated base oil and naphthenic base oil, paraffinic base oil, naphthenic base oil, paraffinic base oil and naphthenic base oil.

[0008] The antioxidant is any one or more of methylene formate, hindered phenol and aromatic amine antioxidants.

[0009] The anti-wear agent is any one or more of tricresyl phosphate, n-octyl phosphite, dodecyl phosphite, n-octylamine phosphate, dodecylamine phosphate, triphenothiophosphate, isooctyl acid phosphate octadecylamine salt, butylisooctyl dodecyl phosphate, tricresyl phosphate, and di-n-butyl phosphite.

[0010] The friction modifier is any one or more of octadecenoic acid, octadecenoylamine, octadecenoyl alcohol, octadecenoic acid ester, and octadecenoic acid amine salt.

[0011] The metal passivator is any one or more of benzotriazole derivatives, benzenetriazole di-n-butylamine formaldehyde condensate, benzenetriazole di-n-octylamine formaldehyde condensate, thiadiazole dodecyl mercaptan hydrogen peroxide condensate, and thiadiazole octadecyl mercaptan hydrogen peroxide condensate.

[0012] The rust inhibitor is any one or more of petroleum sulfonate, succinic acid semi-esters, and dinonylnaphthalene sulfonate; the pour point depressant is polymethacrylate; and the demulsifier is LZ5957 or DL32.

[0013] Another technical solution adopted by the present invention is a method for preparing a universal lubricating oil composition for a hydraulic box and a gear box, which specifically comprises: mixing a base oil, an antioxidant, an antiwear agent, a friction modifier, a metal passivator, a rust inhibitor, and a pour point depressant, stirring at 65°C to 75°C for 2-4 hours, then adding a defoaming agent and a demulsifier, stirring at 65°C to 75°C for 2-4 hours, cooling to room temperature to obtain a mixture A, and filtering the mixture A at a pressure of 0.2MPa to 0.3MPa to obtain a universal lubricating oil composition for a hydraulic box and a gear box.

[0014] The beneficial effects of the present invention are as follows: the lubricating oil composition of the present invention has excellent extreme pressure and anti-wear properties, shear stability, thermal oxidation stability, rust and corrosion resistance, anti-emulsification and anti-foaming properties, and excellent filterability, and can meet the stringent requirements of the hydraulic system for filterability, rust and corrosion resistance, and meet the requirements of the transmission system for extreme pressure and anti-wear, extend the oil change cycle of the lubricating oil, and save maintenance costs and oil change costs. DETAILED DESCRIPTION

[0015] The present invention is described in detail below in conjunction with specific implementation modes.

[0016] The universal lubricating oil composition for hydraulic box and gear box of the present invention comprises the following components by mass percentage: 0.5% to 5.0% antioxidant, 0.5% to 2.0% antiwear agent, 0.02% to 2.0% friction modifier, 0.02% to 1.0% metal passivator, 0.05% to 0.2% rust inhibitor, 0.1% to 2.0% pour point depressant, 0.001% to 0.06% defoamer, 0.001% to 0.05% demulsifier, and the balance is base oil, and the sum of the mass percentages of the above components is 100%.

[0017] The base oil may be a Class I mineral oil and a Class II hydrogenated base oil, with a mass ratio of 85:15; the base oil may also be a Class II hydrogenated base oil and a naphthenic base oil, with a mass ratio of 95:5; the base oil may also be a paraffinic base oil and / or a naphthenic base oil;

[0018] The antioxidant is any one or more of methylene formate, hindered phenol, and aromatic amine antioxidants;

[0019] The anti-wear agent is any one or more of tricresyl phosphate, n-octyl phosphite, dodecyl phosphite, n-octylamine phosphate, dodecylamine phosphate, triphenyl thiophosphate, isooctyl acid phosphate octadecylamine salt, butyl isooctyl phosphate dodecylamine salt, tricresyl phosphate, and di-n-butyl phosphite;

[0020] The friction modifier is any one or more of octadecenoic acid, octadecenoylamine, octadecenoyl alcohol, octadecenoic acid ester, and octadecenoic acid amine salt;

[0021] The metal passivator is any one or more of benzotriazole derivatives, benzenetriazole di-n-butylamine formaldehyde condensate, benzenetriazole di-n-octylamine formaldehyde condensate, thiadiazole dodecyl mercaptan hydrogen peroxide condensate, and thiadiazole octadecyl mercaptan hydrogen peroxide condensate;

[0022] The rust inhibitor is any one or more of petroleum sulfonate, succinic acid semi-esters, and dinonylnaphthalene sulfonate; the appropriate content in the lubricating oil composition is 0.05% to 0.2%;

[0023] The pour point depressant is polymethacrylate (PMA) with a molecular weight of less than 30,000, and its content in the lubricating oil composition is 0.1-2.0%;

[0024] The defoaming agent is dimethyl silicone oil, acrylate or homopolymer or copolymer of acrylate, No. 1 composite antifoaming agent, No. 2 composite antifoaming agent, or any combination thereof, and the appropriate content in the lubricating oil is 0.001% to 0.06%.

[0025] The demulsifier is LZ5957 or DL32, or any combination thereof, and the suitable content in the lubricating oil composition is 0.001% to 0.05%;

[0026] The invention contains at least one mineral base oil, at least one antioxidant, at least one antiwear agent, at least one friction modifier, at least one metal passivator, at least one rust inhibitor, at least one pour point depressant, at least one antifoaming agent, and at least one demulsifier. The interaction relationship between the base oil and the additives is studied, the ratio relationship between the additives is screened, and the ratio relationship between the base oil and the additives is carefully selected to achieve a balance between extreme pressure and corrosion protection, and a balance between extreme pressure and antiwear and filterability, while taking into account the performances of anti-oxidation, anti-shearing, anti-emulsification, etc., so as to achieve the expected purpose.

[0027] The preparation method of the hydraulic box-gear box universal lubricating oil composition of the present invention is specifically as follows:

[0028] The base oil, antioxidant, antiwear agent, friction modifier, metal passivator, rust inhibitor and pour point depressant are mixed, stirred at 65°C-75°C for 2-4 hours, defoamer and demulsifier are added, stirred at 65°C-75°C for 2-4 hours, cooled to room temperature to obtain mixture A, and the mixture A is filtered at a pressure of 0.2MPa-0.3MPa to obtain a hydraulic box-gear box universal lubricating oil composition.

[0029] Example 1

[0030] The composition of the hydraulic box-gear box universal lubricating oil composition of this embodiment is shown in Table 1:

[0031] Table 1 Composition of hydraulic box-gear box universal lubricating oil composition

[0032] name Dosage (mass percentage) HVI400 / HVIH12 margin Phosphate dodecylamine salt 2.0 Benzenetridibutylamine formaldehyde condensate 0.5 4,4'-Methylenebis(2,6-di-tert-butylphenol) 0.5 Octadecenoic acid 0.02 Dinonylnaphthalenesulfonate 0.2 Polymethacrylate 0.1 T901 0.01 LZ5957 0.01 content 100

[0033] Example 2

[0034] The composition of the hydraulic box-gear box universal lubricating oil composition of this embodiment is shown in Table 2:

[0035] Table 2 Composition of hydraulic box-gear box universal lubricating oil composition

[0036]

[0037]

[0038] Example 3

[0039] The composition of the hydraulic box-gear box universal lubricating oil composition of this embodiment is shown in Table 3:

[0040] Table 3 Composition of hydraulic box-gear box universal lubricating oil composition

[0041] name Amount (mass percentage) HVIH12 / HVIH150BSM margin Tricresyl phosphate 0.5 Butyl isooctyl phosphate dodecylamine salt 0.5 4,4'-Methylenebis(2,6-di-tert-butylphenol) 1.0 Octadecenoic acid amine salt 1.0 Calcium alkyl phenol sulfide 0.05 Polymethacrylate 0.3 T922 0.03 LZ5957 0.05 content 100

[0042] Taking Examples 1 and 2 as examples, the test results of the oil products are as follows:

[0043]

[0044]

[0045] It can be seen that the oil blended in Example 1 and Example 2 has excellent antioxidant performance, FZG failure level 12, Timken can reach 200N, good antioxidant performance, and the rotating oxygen bomb can reach 1257min. At the same time, it has excellent anti-rust, anti-foaming and demulsification properties, which can effectively extend the service life of the oil and meet the lubrication requirements of the hydraulic system and the gearbox system.

Claims

1. A universal lubricating oil composition for a hydraulic box and a gear box, characterized in that: The composition includes the following components by mass percentage: antioxidant 0.5%-5.0%, antiwear agent 0.5%-2.0%, friction modifier 0.02%-2.0%, metal passivator 0.02%-1.0%, rust inhibitor 0.05%-0.2%, pour point depressant 0.1%-2.0%, defoamer 0.001%-0.06%, demulsifier 0.001%-0.05%, and the balance is base oil. The sum of the mass percentages of the above components is 100%.

2. The hydraulic box-gear box universal lubricating oil composition according to claim 1, characterized in that: The base oil is any one of Class I mineral oil and Class II hydrogenated base oil, Class II hydrogenated base oil and cycloalkyl base oil, paraffin base oil, cycloalkyl base oil, paraffin base oil and cycloalkyl base oil.

3. The hydraulic box-gear box universal lubricating oil composition according to claim 1, characterized in that: The antioxidant is any one or more of methylene formate, hindered phenol and aromatic amine antioxidants.

4. The hydraulic box-gear box universal lubricating oil composition according to claim 1, characterized in that: The anti-wear agent is any one or more of tricresyl phosphate, n-octyl phosphite, dodecyl phosphite, n-octylamine phosphate, dodecylamine phosphate, triphenothiophosphate, isooctyl acid phosphate octadecylamine salt, butylisooctyl dodecyl phosphate, tricresyl phosphate, and di-n-butyl phosphite.

5. The hydraulic box-gear box universal lubricating oil composition according to claim 1, characterized in that: The friction modifier is any one or more of octadecenoic acid, octadecenoylamine, octadecenoyl alcohol, octadecenoic acid ester, and octadecenoic acid amine salt.

6. The hydraulic box-gear box universal lubricating oil composition according to claim 1, characterized in that: The metal passivator is any one or more of benzotriazole derivatives, benzenetriazole di-n-butylamine formaldehyde condensate, benzenetriazole di-n-octylamine formaldehyde condensate, thiadiazole dodecyl mercaptan hydrogen peroxide condensate, and thiadiazole octadecyl mercaptan hydrogen peroxide condensate.

7. The hydraulic box-gear box universal lubricating oil composition according to claim 1, characterized in that: The rust inhibitor is any one or more of petroleum sulfonate, succinic acid semi-lipid, and dinonylnaphthalene sulfonate; the pour point depressant is polymethacrylate; and the demulsifier is LZ5957 or DL32.

8. The method for preparing the hydraulic box-gear box universal lubricating oil composition according to any one of claims 1 to 7, characterized in that: Specifically, base oil, antioxidant, antiwear agent, friction modifier, metal passivator, rust inhibitor and pour point depressant are mixed, stirred at 65°C-75°C for 2-4 hours, defoamer and demulsifier are added, stirred at 65°C-75°C for 2-4 hours, cooled to room temperature to obtain mixture A, and mixture A is filtered at a pressure of 0.2MPa-0.3MPa to obtain a hydraulic box-gear box universal lubricating oil composition.

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