Lubricating oil as well as preparation method, application and use method thereof

Abstract

The invention belongs to the technical field of lubricating oil preparation and relates to lubricating oil as well as a preparation method, application and a use method thereof. The lubricating grease composition comprises the following components in percentage by volume: 10-99.99% of lithium-based lubricating grease and 0.01-90% of anti-wear hydraulic oil, wherein the 0.1 mm working penetration of the lithium-based lubricating grease is lower than 500, and preferably, the 0.1 mm working penetration is 310 to 340; the flash point of the anti-wear hydraulic oil is not lower than 185 DEG C, preferably 230-250 DEG C, and the kinematic viscosity at 40 DEG C is 41.4 mm < 2 > / s-50.6 mm < 2 > / s. Compared with the prior art, the lubricating oil disclosed by the invention has the following beneficial effects that the lubricating oil comprises the lithium-based lubricating grease and the anti-wear hydraulic oil, the lubricating oil can adapt to use at different temperatures by adjusting the mixing proportion of the lithium-based lubricating grease and the anti-wear hydraulic oil, the problem that the crane tube motor lubricating oil is condensed into a ball in the use process is solved, and the crane tube failure rate is greatly reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of lubricating oil preparation, and in particular, relates to a lubricating oil and a preparation method, application and use method thereof. Background Art

[0002] The crane is a special equipment used in the fluid loading and unloading process of the petrochemical industry, also known as the fluid loading and unloading arm. It is a mobile device that can transfer liquid media between trains, tank cars and trestle pipelines. The crane mainly includes motor components, vertical pipe traction actuator components, trolley traction drive components, vertical pipe components, etc. At present, there are 56 cranes in the closed gasoline loading train facilities of the storage and transportation department of Cangzhou Refining and Chemical Company. The structure is truss type and driven by a pneumatic motor.

[0003] The high failure rate of crane pipes is the main problem of crane pipes now. The high failure rate is mainly due to: the vertical pipes in the crane pipes cannot be lifted or lowered normally or the action is not in place; the airbags and sealing caps are damaged or aged; the wire rope is entangled; the mobile trolley fails, etc. According to statistics, vertical pipe failures account for 85% of the total failures. It can be said that vertical pipe failures are the main problem of crane pipes. The high failure rate of crane pipes affects the delivery of gasoline products: it causes a large amount of oil and gas leakage, which not only causes environmental pollution, but also causes waste of finished oil because the oil and gas cannot be recovered, and there are safety risks: it causes a large workload for the loading personnel of the storage and transportation department and the Bohai maintenance personnel, especially during night maintenance in winter, and there are safety hazards in high-altitude operations.

[0004] The motor is the power source for the crane to load trains. The performance of the motor directly determines the success or failure of the extension and retraction process of the vertical pipe. Lithium-based grease is generally used as the grease for the motor, but it is often found that the vertical pipe of the crane cannot rise and fall normally during use. Disassembly inspection found that the grease inside the motor condensed into a ball and basically lost its lubricating function, especially in extremely cold winter, the frequency of occurrence is very high.

[0005] In order to solve the problem of high failure rate of crane pipes, it is urgent to develop a crane pipe motor lubricant with high fluidity and low temperature resistance. Summary of the invention

[0006] In order to solve the above-mentioned problems of the prior art, the purpose of the present invention is to provide a lubricating oil and its preparation method, application and use method, which can adapt to use at different temperatures, solves the problem that the lubricating oil of the crane motor condenses into a ball during use, and greatly reduces the failure rate of the crane.

[0007] In order to achieve the above object, the first aspect of the present invention provides a lubricating oil, which comprises the following components in volume percentage:

[0008] Lithium-based grease 10-99.99% and anti-wear hydraulic oil 0.01-90%;

[0009] Wherein, the 0.1 mm working cone penetration of the lithium-based grease is less than 500, preferably 310 to 340;

[0010] The flash point of the anti-wear hydraulic oil is not less than 185°C, preferably 230-250°C, and the kinematic viscosity at 40°C is 41.4 mm 2 / s~50.6mm 2 / s.

[0011] The second aspect of the present invention provides a method for preparing the lubricating oil, comprising the following steps:

[0012] The lithium-based grease is heated to 70-90° C., anti-wear hydraulic oil is added, stirred for reaction for 1-2 hours, and cooled to obtain the lubricating oil.

[0013] The third aspect of the present invention provides the use of the lubricating oil in a crane motor.

[0014] A fourth aspect of the present invention provides a method for using the lubricating oil in a crane motor, comprising the following steps: preparing the lubricating oil according to the preparation method, and injecting the lubricating oil into the crane motor;

[0015] Preferably, when the ambient temperature is lower than -10°C, the volume ratio of the anti-wear hydraulic oil and the lithium-based grease is (3-4):1;

[0016] When the ambient temperature is -10℃~30℃, the volume ratio of anti-wear hydraulic oil and lithium-based grease is (1~3):1;

[0017] When the ambient temperature is higher than 30°C, the volume ratio of the anti-wear hydraulic oil to the lithium-based grease is (0.01-1):1, preferably (0.05-0.1):1.

[0018] The present invention has the following beneficial effects:

[0019] (1) The lubricating oil of the present invention comprises lithium-based lubricating grease and anti-wear hydraulic oil. By adjusting the mixing ratio of lithium-based lubricating grease and anti-wear hydraulic oil, the lubricating oil can be adapted to use at different temperatures, thereby solving the problem of the lubricating oil of the crane motor condensing into a mass during use and greatly reducing the failure rate of the crane.

[0020] (2) The lubricating oil of the present invention adds antifreeze agent to the anti-wear hydraulic oil, which further improves the fluidity and low temperature resistance of the motor lubricating oil, and solves the problem of high failure frequency of the crane motor lubricating oil in extremely cold winter conditions.

[0021] Other features and advantages of the present invention will be described in detail in the following detailed description. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0023] In order to achieve the above object, the first aspect of the present invention provides a lubricating oil, which comprises the following components in volume percentage:

[0024] Lithium-based grease 10-99.99% and anti-wear hydraulic oil 0.01-90%;

[0025] Wherein, the 0.1 mm working cone penetration of the lithium-based grease is less than 500, preferably 310 to 340;

[0026] The flash point of the anti-wear hydraulic oil is not less than 185°C, preferably 230-250°C, and the kinematic viscosity at 40°C is 41.4 mm 2 / s~50.6mm 2 / s.

[0027] According to the present invention, preferably, the lubricating oil comprises the following components in volume percentage: 20-95% lithium-based lubricating grease and 5-80% anti-wear hydraulic oil.

[0028] According to the present invention, preferably, in parts by weight, the lithium-based grease comprises the following components: 80-97 parts of base oil, 2-15 parts of lithium-based thickener, and 1-5 parts of lithium-based grease additive; preferably, the lithium-based grease comprises the following components in parts by weight: 85-95 parts of base oil, 5-10 parts of lithium-based thickener, and 3-5 parts of lithium-based grease additive.

[0029] According to the present invention, preferably, in parts by weight, the anti-wear hydraulic oil comprises the following components: 80-95 parts of base oil, 1-8 parts of hydraulic oil additives, 1-6 parts of other anti-wear hydraulic oil additives, and 1-12 parts of antifreeze; preferably, the anti-wear hydraulic oil comprises the following components in parts by weight: 85-90 parts of base oil, 2-5 parts of hydraulic oil additives, 3-5 parts of other anti-wear hydraulic oil additives, and 6-10 parts of antifreeze.

[0030] According to the present invention, preferably, the base oils of the lithium-based grease and the anti-wear hydraulic oil are both paraffin-based base oils, and preferably, the viscosity of the paraffin-based base oil is 9-11 mm 2 / s.

[0031] In the present invention, the paraffin-based base oil may be selected from but is not limited to at least one of CNOOC -20°C transformer oil, Handi Sunshine 60N, Maoming Petrochemical 10# white oil and Ssangyong 70N.

[0032] According to the present invention, preferably, the lithium-based thickener is a lithium salt of a fatty acid, and preferably the fatty acid is stearic acid and / or 12-hydroxystearic acid.

[0033] According to the present invention, preferably, the lithium-based grease additive includes an antioxidant, an extreme pressure agent, a corrosion inhibitor and a viscosity improver; the antioxidant is an amine antioxidant and / or a phenolic antioxidant, preferably, the amine antioxidant is dialkyl diphenylamine, and the phenolic antioxidant is 2,6-di-tert-butyl-p-cresol; the extreme pressure agent is selected from at least one of borates, boric acid esters, zinc dialkyl dithiophosphates, molybdenum dialkyl dithiocarbamates and sulfided olefins; the corrosion inhibitor is selected from at least one of benzotriazole, benzotriazole derivatives and thiadiazole derivatives; and the viscosity improver is an ethylene-propylene copolymer.

[0034] According to the present invention, preferably, the hydraulic oil additive comprises: C15-C50 deeply refined mineral oil, alkyl dithiophosphate zinc, hindered alkyl phenol, calcium salicylate sulfide, aralkyl polyether, sulfurized branched alkyl phenol calcium, branched alkyl phenol calcium and dialkyl cycloalkyl sulfonate zinc; preferably, the mass ratio of the C15-C50 deeply refined mineral oil, alkyl dithiophosphate zinc, hindered alkyl phenol, calcium salicylate sulfide, aralkyl polyether, sulfurized branched alkyl phenol calcium, branched alkyl phenol calcium and dialkyl cycloalkyl sulfonate zinc is (19-21): (39-41): (2.5-3.5): (1.5-2.5): (1.5-2.5): (0.3-0.5): 1.

[0035] According to the present invention, preferably, the other anti-wear hydraulic oil additives include metal deactivators, pour point depressants and extreme pressure anti-wear agents; the pour point depressants are polymethacrylate solutions; the metal deactivators are selected from at least one of benzotriazole derivative compounds, thiadiazole derivative compounds and organic amine compounds; the extreme pressure anti-wear agent is selected from at least one of phosphate compounds, phosphite compounds, organic sulfides, phosphorus-nitrogen compounds, sulfur-phosphorus-nitrogen compounds and organic chlorides.

[0036] According to the present invention, preferably, the antifreeze agent is at least one of ethylene glycol, polyvinyl alcohol, polyisobutylene, methyl methacrylate and sodium dodecyl sulfonate; preferably sodium dodecyl sulfonate.

[0037] The second aspect of the present invention provides a method for preparing the lubricating oil, comprising the following steps:

[0038] The lithium-based grease is heated to 70-90° C., anti-wear hydraulic oil is added, stirred for reaction for 1-2 hours, and cooled to obtain the lubricating oil.

[0039] In the present invention, the obtained lubricating oil is brown-yellow grease and has slight fluidity at room temperature.

[0040] According to the present invention, preferably, the following steps are also included:

[0041] (1) Preparation of lithium-based grease: taking part of the base oil and heating it to 80-90° C., adding a lithium-based thickener for thickening, stirring and heating to 190-220° C. after the thickening is completed, adding the remaining paraffin-based base oil, cooling to 80-100° C., adding a lithium-based grease additive and an antifreeze agent, stirring evenly, and cooling to obtain the lithium-based grease; wherein the ratio of part of the base oil to the remaining base oil is (2-4):1;

[0042] (2) Preparation of anti-wear hydraulic oil: base oil, hydraulic oil additive, anti-wear hydraulic oil additive and antifreeze are mixed, heated to 70-80° C., stirred for reaction for 4-5 hours, and cooled to obtain the anti-wear hydraulic oil.

[0043] The third aspect of the present invention provides the use of the lubricating oil in a crane motor.

[0044] The fourth aspect of the present invention provides a method for using the lubricating oil in a crane motor, comprising the following steps: preparing the lubricating oil according to the preparation method and injecting the lubricating oil into the crane motor.

[0045] According to the present invention, preferably, when the ambient temperature is lower than -10°C, the volume ratio of the anti-wear hydraulic oil and the lithium-based grease is (3-4):1; at room temperature, the lubricating oil can be seen to flow slightly. After mixing, it is picked up with a stick and becomes wire-drawn, and the working cone penetration is 448mm-458mm.

[0046] When the ambient temperature is -10℃~30℃, the volume ratio of anti-wear hydraulic oil and lithium-based grease is (1~3):1; at room temperature, the lubricating oil can be seen to flow slightly. After mixing, it is picked up with a stick and becomes a wire-drawn shape. The working cone penetration is 428mm~448mm.

[0047] When the ambient temperature is higher than 30°C, the volume ratio of anti-wear hydraulic oil and lithium-based grease is (0.01-1):1, preferably (0.05-0.1):1. At room temperature, the lubricating oil can be seen to flow slightly. After mixing, it is picked up with a stick and is in a wire-drawing shape. The working cone penetration is 310mm-428mm.

[0048] In the present invention, the obtained lubricating oil is brown-yellow grease and has slight fluidity at room temperature.

[0049] The present invention will be further described below in conjunction with embodiments, but the scope of the present invention is not limited to these embodiments.

[0050] The performance test standard of lubricating oil is based on GB / T3142-1982(2004)GB / T269-1991.

[0051] The hydraulic oil additive is configured in the following proportions: the mass ratio of C15-C50 deeply refined mineral oil, alkyl dithiophosphate zinc, hindered alkylphenol, calcium salicylate sulfide, arylalkyl polyether, sulfurized branched alkyl phenol calcium, branched alkyl phenol calcium and dialkyl cycloalkyl sulfonate zinc is 20:40:3:2:2:0.4:1.

[0052] Example 1

[0053] Preparation of lithium-based grease: Take 60g of 10# white oil from Maoming Petrochemical and heat it to 80-90°C, add 8g of 12-hydroxystearate lithium salt to thicken, stir and heat to 190-220°C after thickening, add 30g of 10# white oil from Maoming Petrochemical, cool to 80-100°C, add 0.2g of 2,6-di-tert-butyl-p-cresol, 0.7g of boric acid ester, 0.8g of benzotriazole and 0.4g of ethylene-propylene copolymer, stir evenly, and cool to obtain the lithium-based grease;

[0054] Preparation of anti-wear hydraulic oil: 88g of 10# white oil from Maoming Petrochemical, 4g of hydraulic oil additive, 0.3g of polymethacrylate solution, 0.8g of thiadiazole derivative compound, 1g of phosphorus nitrogen compound and 7g of sodium dodecyl sulfate were mixed, heated to 70-80°C, stirred for reaction for 4-5 hours, and cooled to obtain the anti-wear hydraulic oil.

[0055] Take 40 ml of lithium-based grease and heat it to 70-90° C., add 80 ml of anti-wear hydraulic oil, stir and react for 1-2 hours, and cool to obtain the lubricating oil.

[0056] Example 2

[0057] The only difference from Example 1 is that 26.7 ml of lithium-based grease is heated to 70-90° C., 80 ml of anti-wear hydraulic oil is added, the mixture is stirred for reaction for 1-2 hours, and the lubricating oil is obtained by cooling.

[0058] Example 3

[0059] The only difference from Example 1 is that 20 ml of lithium-based grease is heated to 70-90° C., 80 ml of anti-wear hydraulic oil is added, stirred for reaction for 1-2 hours, and cooled to obtain the lubricating oil.

[0060] Example 4

[0061] The only difference from Example 1 is that 16 ml of lithium-based grease is heated to 70-90° C., 80 ml of anti-wear hydraulic oil is added, stirred for reaction for 1-2 hours, and cooled to obtain the lubricating oil.

[0062] Example 5

[0063] The only difference from Example 1 is that 80 ml of lithium-based grease is heated to 70-90° C., 5 ml of anti-wear hydraulic oil is added, stirred for reaction for 1-2 hours, and cooled to obtain the lubricating oil.

[0064] Example 6

[0065] The only difference from Example 1 is that sodium dialkyl sulfonate is replaced by methyl methacrylate.

[0066] Example 7

[0067] The only difference from Example 1 is that the amount of sodium dialkyl sulfonate used is 12 g.

[0068] Example 8

[0069] The only difference from Example 1 is that no sodium dialkyl sulfonate is added.

[0070] Comparative Example 1

[0071] The only difference from Example 4 is that no anti-wear hydraulic oil is added.

[0072] Comparative Example 2

[0073] The only difference from Example 1 is that the lithium-based lubricating grease is Great Wall General Lithium-based Lubricating Grease No. 3 purchased from Sinopec Lubricant Co., Ltd., and its 0.1 mm working cone penetration is 228.

[0074] Comparative Example 3

[0075] Only Great Wall general lithium-based grease No. 1 purchased from Sinopec Lubricant Co., Ltd. was used.

[0076] Test Case

[0077] Table 1 of various performance indicators of the lubricating oils of Examples 1-7 and Comparative Examples 1-3:

[0078] Table 1

[0079]

[0080] It can be seen from Table 1 that, compared with the comparative example, the lubricating oil obtained in the embodiment has a higher cone penetration value, has higher fluidity, can adapt to use at different temperatures, solves the problem of the crane motor lubricating oil condensing into a ball during use, and greatly reduces the crane failure rate, especially the failure rate in extremely cold winter conditions.

[0081] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A lubricating oil, characterized in that: In terms of volume percentage, it includes the following components: Lithium-based grease 10-99.99% and anti-wear hydraulic oil 0.01-90%; Wherein, the 0.1 mm working cone penetration of the lithium-based grease is less than 500, preferably 310 to 340; The flash point of the anti-wear hydraulic oil is not less than 185°C, preferably 230-250°C, and the kinematic viscosity at 40°C is 41.4 mm 2 / s~50.6mm 2 / s.

2. The lubricating oil according to claim 1, wherein Calculated by volume percentage, the lubricating oil comprises the following components: 20-95% of lithium-based lubricating grease and 5-80% of anti-wear hydraulic oil.

3. The lubricating oil according to claim 1, wherein: In parts by weight, the lithium-based grease comprises the following components: 80-97 parts of base oil, 2-15 parts of lithium-based thickener, and 1-5 parts of lithium-based grease additive; preferably, the lithium-based grease comprises the following components in parts by weight: 85-95 parts of base oil, 5-10 parts of lithium-based thickener, and 3-5 parts of lithium-based grease additive; In parts by weight, the anti-wear hydraulic oil comprises the following components: 80-95 parts of base oil, 1-8 parts of hydraulic oil additives, 1-6 parts of other anti-wear hydraulic oil additives, and 1-12 parts of antifreeze; preferably, the anti-wear hydraulic oil comprises the following components in parts by weight: 85-90 parts of base oil, 2-5 parts of hydraulic oil additives, 3-5 parts of other anti-wear hydraulic oil additives, and 6-10 parts of antifreeze.

4. The lubricating oil according to claim 3, wherein: The base oils of the lithium-based grease and the anti-wear hydraulic oil are both paraffin-based base oils. Preferably, the viscosity of the paraffin-based base oil is 9-11 mm 2 / s.

5. The lubricating oil according to claim 3, wherein: The lithium-based thickener is a lithium salt of a fatty acid, and preferably the fatty acid is stearic acid and / or 12-hydroxystearic acid; The lithium-based grease additives include antioxidants, extreme pressure agents, corrosion inhibitors and viscosity improvers; The antioxidant is an amine antioxidant and / or a phenolic antioxidant. Preferably, the amine antioxidant is dialkyl diphenylamine, and the phenolic antioxidant is 2,6-di-tert-butyl-p-cresol; The extreme pressure resistance agent is selected from at least one of borates, boric acid esters, zinc dialkyl dithiophosphates, molybdenum dialkyl dithiocarbamates and sulfided olefins; The anticorrosive agent is selected from at least one of benzotriazole, benzotriazole derivatives and thiadiazole derivatives; The viscosity improver is ethylene-propylene copolymer.

6. The lubricating oil according to claim 3, wherein: The hydraulic oil additive comprises: C15-C50 deeply refined mineral oil, alkyl dithiophosphate zinc, hindered alkyl phenol, calcium salicylate sulfide, aralkyl polyether, sulfurized branched alkyl phenol calcium, branched alkyl phenol calcium and dialkyl cycloalkyl sulfonate zinc; preferably, the mass ratio of the C15-C50 deeply refined mineral oil, alkyl dithiophosphate zinc, hindered alkyl phenol, calcium salicylate sulfide, aralkyl polyether, sulfurized branched alkyl phenol calcium, branched alkyl phenol calcium and dialkyl cycloalkyl sulfonate zinc is (19-21): (39-41): (2.5-3.5): (1.5-2.5): (1.5-2.5): (0.3-0.5): 1; The other anti-wear hydraulic oil additives include metal deactivators, pour point depressants and extreme pressure anti-wear agents; The pour point depressant is a polymethacrylate solution; The metal deactivator is selected from at least one of benzotriazole derivative compounds, thiadiazole derivative compounds and organic amine compounds; The extreme pressure anti-wear agent is selected from at least one of phosphate compounds, phosphite compounds, organic sulfides, phosphorus-nitrogen compounds, sulfur-phosphorus-nitrogen compounds and organic chlorides; The antifreeze agent is at least one of ethylene glycol, polyvinyl alcohol, polyisobutylene, methyl methacrylate and sodium dodecyl sulfonate; preferably sodium dodecyl sulfonate.

7. The method for preparing the lubricating oil according to any one of claims 1 to 6, characterized in that: The steps include: The lithium-based grease is heated to 70-90° C., anti-wear hydraulic oil is added, stirred for reaction for 1-2 hours, and cooled to obtain the lubricating oil.

8. The preparation method according to claim 7, wherein: The following steps are also included: (1) Preparation of lithium-based grease: taking part of the base oil and heating it to 80-90° C., adding a lithium-based thickener for thickening, stirring and heating to 190-220° C. after the thickening is completed, adding the remaining paraffin-based base oil, cooling to 80-100° C., adding a lithium-based grease additive and an antifreeze agent, stirring evenly, and cooling to obtain the lithium-based grease; wherein the ratio of part of the base oil to the remaining base oil is (2-4):1; (2) Preparation of anti-wear hydraulic oil: base oil, hydraulic oil additive, anti-wear hydraulic oil additive and antifreeze are mixed, heated to 70-80° C., stirred for reaction for 4-5 hours, and cooled to obtain the anti-wear hydraulic oil.

9. Use of the lubricating oil according to any one of claims 1 to 6 or the lubricating oil prepared by the preparation method according to claim 7 or 8 in a crane motor.

10. A method for using the lubricating oil according to any one of claims 1 to 6 or the lubricating oil prepared by the preparation method according to claim 7 or 8 in a crane motor, characterized in that: The steps include: preparing lubricating oil according to the preparation method of claim 7 or 8, and injecting the lubricating oil into the crane motor; Preferably, when the ambient temperature is lower than -10°C, the volume ratio of the anti-wear hydraulic oil and the lithium-based grease is (3-4):1; When the ambient temperature is -10℃~30℃, the volume ratio of anti-wear hydraulic oil and lithium-based grease is (1~3):1; When the ambient temperature is higher than 30°C, the volume ratio of the anti-wear hydraulic oil to the lithium-based grease is (0.01-1):1, preferably (0.05-0.1):1.

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