Railway speed-reducing head ultra-low temperature special oil composition and preparation method thereof

Abstract

The application discloses a railway speed bump super-low-temperature special oil composition and a preparation method thereof. The railway speed bump super-low-temperature special oil composition comprises the following components in parts by mass: a viscosity index improver 11-20 parts; a metal deactivator 0.03-0.1 part; an antirust agent 0.03-0.1 part; an antioxidant 0.2-1.0 part; an antiwear agent 0.01-0.1 part; a pour point depressant 0.2-1.0 part; an antifoaming agent 0.01-0.05 part; and base oil 77.65-88.52 parts. The railway speed bump super-low-temperature special oil composition has excellent oxidation resistance, wear resistance and rust resistance, especially has super-high viscosity index (greater than 340) and excellent low-temperature flow performance, can guarantee smooth operation of the speed bump under extreme low-temperature conditions (-40 DEG C), can meet the requirements of extremely harsh working conditions, and the oil product can pass all requirements of OEM quality indexes.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of railway retarder ultra-low temperature special oil composition and its preparation method. BACKGROUND

[0002] Retarder is used in the stage of hump speed regulation system, located at the both ends of the track, without external energy, without external control, can according to the action of the speed itself, achieve the effect of deceleration. Retarder is usually placed in the stage of hump speed regulation system, its external environment temperature range is-40 ℃~40 ℃, the lowest starting temperature can reach-40 ℃ when working in winter, requires oil to have excellent viscosity-temperature performance and low temperature performance;When working, multiple train carriages pass through retarder in turn, its maximum load can reach 40 tons, and the wear resistance of oil is required higher. The railway retarder running in low temperature environment, 10 aviation hydraulic oil is generally used as low temperature railway retarder oil at present, but its low temperature performance is insufficient, and the wear resistance is poor, which can cause the problems of unstable operation of retarder, high equipment failure rate and the like. SUMMARY

[0003] In order to improve the low temperature performance and wear resistance of oil, to realize the requirements of low operating temperature and high working pressure of railway retarder, the present application is made.

[0004] As a first aspect of the present application, it relates to a railway retarder ultra-low temperature special oil composition, which comprises the following components by mass fraction: viscosity index improver 11-20 parts;Metal deactivator 0.03-0.1 parts;Antirust agent 0.03-0.1 parts;Antioxidant 0.2-1.0 parts;Antiwear agent 0.01-0.1 parts;Pour point depressant 0.2-1.0 parts;Antifoam agent 0.01-0.05 parts;Base oil 77.65-88.52 parts.

[0005] In one or some optional embodiments, the viscosity index improver is an olefin copolymer and its derivative.

[0006] In one or some preferred embodiments, the viscosity index improver is polymethyl acrylate.

[0007] In one or some optional embodiments, the molecular weight of the polymethyl acrylate is about 150,000, and the number of side chain carbons is 10-16.

[0008] In one or some optional embodiments, the metal deactivator is benzotriazole derivative, which has the following structure:

[0009]

[0010] In the formula, R is a benzene ring, and R' is a butane group.

[0011] In one or some optional embodiments, the benzotriazole derivative has a kinematic viscosity of 80 mm 2 / s, and a nitrogen content of 14.6%.

[0012] In one or some optional embodiments, the rust preventive agent is dodecenyl succinic acid.

[0013] In one or some optional embodiments, the antioxidant agent is 2,6-di-tert-butyl-p-cresol.

[0014] In one or some optional embodiments, the anti-wear agent is trimethylphosphite.

[0015] In one or some optional embodiments, the trimethylphosphite has a phosphorus content of 11.7%, a wear scar diameter of 0.45 mm, and a Pb value of 540 N.

[0016] In one or some optional embodiments, the pour point depressant is polymethyl methacrylate.

[0017] In one or some optional embodiments, the polymethyl methacrylate has a molecular weight of about 80,000, and a pour point effect of not less than 10°C.

[0018] In one or some optional embodiments, the anti-foaming agent is methyl silicone oil or phosphoric acid ester.

[0019] In one or some preferred embodiments, the anti-foaming agent is methyl silicone oil.

[0020] In one or some optional embodiments, the base oil is low viscosity hydrogenated refined industrial white oil.

[0021] In one or some preferred embodiments, the base oil is W1-100 industrial white oil.

[0022] In one or some optional embodiments, the W1-100 industrial white oil has a kinematic viscosity of 1-2.5 mm 2 / s at 40°C, and an open flash point of 100-120°C.

[0023] As a second aspect of the present application, a method for preparing the above-mentioned railway EHL special oil composition is provided, which comprises:

[0024] Mixing the viscosity index improver, the metal deactivator, the rust preventive agent, the antioxidant agent, the anti-wear agent, the pour point depressant, the anti-foaming agent, and the base oil uniformly.

[0025] The railway speed bump super-low temperature special oil composition of the present application has excellent oxidation resistance, wear resistance, rust resistance, especially super-high viscosity index (more than 340) and excellent low temperature flow performance, which can ensure the smooth operation of the speed bump under extremely low temperature conditions (-40 DEG C), meet the requirements of extremely harsh working conditions, and the oil product can meet all requirements of OEM quality indicators.

[0026] The present application adopts polymethyl methacrylate (PMA) as a viscosity index improver, which is an oil-soluble chain polymer compound, at high temperature, the polymer compound molecules stretch, so that the hydrodynamic volume increases, and the internal friction of the liquid increases, that is, the viscosity increases; at low temperature, the polymer compound molecules shrink and curl, so that the hydrodynamic volume becomes smaller, and the internal friction becomes smaller, that is, the viscosity of the oil product becomes smaller. In addition, the viscosity index improver with a molecular weight of 20-30 thousand is used in the present application, and the mass percentage in the composition is 11-20%, which can ensure that the oil product has a -40mm 2 / s.

[0027] The metal deactivator used in the present application is an organic compound containing non-metallic elements such as P, S and N, which can inhibit the catalytic effect of metal or its ion on oxidation through film forming and chelation, thereby improving the oxidation resistance of the oil product.

[0028] The sulfonate compound is used as a rust inhibitor in the present application, which has excellent rust prevention performance, can wet the metal surface and form a metal protective film during the use of lubricating oil, and can still form a firm oil film on the metal surface even in the presence of moisture, thereby protecting the metal from rust and corrosion.

[0029] The 2,6-di-tert-butyl-p-cresol (BHT) is used as an antioxidant in the present application, which can react with free radicals to become an inert substance, thereby terminating the oxidation reaction and improving the oxidation resistance of the oil product.

[0030] The anti-wear agent with phosphoric acid trimethylphenyl ester structure is used in the present application, which has good wear resistance and small corrosion, and under the condition of bearing load on the metal surface, the anti-wear agent reacts with the metal surface to form a metal protective film with low shear strength, thereby preventing metal wear.

[0031] The poly methyl methacrylate (PMA) is used as the pour point depressant in the present application, the polymerization degree of which influences the pour point depressing effect, and the average carbon number of the side chain is decisive to the pour point depressing effect, because the starting crystallization temperature of the solid wax in the base oil should be consistent with the starting crystallization temperature of the side chain alkyl, but the solid wax structure of the base oil is complex, and the crystallization temperature is wide, so the pour point depressant structure with different side chain length and crystallization temperature is needed. The pour point depressant with the side chain carbon number of 10-16 is used in the present application, the mass percentage of which in the composition is 0.2-1.0%, and the pour point of the oil product is lowered by at least-12℃, and the pour point of the oil product is lower than-60℃.

[0032] The anti-foaming agent used in the present application is the methyl silicone oil type composite anti-foaming agent, which has good defoaming performance and air releasing property, and ensures the anti-foaming sustainability in the use process.

[0033] The W1-100 industrial white oil is used as the base oil in the present application, which can provide better low temperature viscosity. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail as follows: The embodiments of the present application are implemented on the premise of the technical scheme of the present application, and the detailed implementation mode and process are given, but the protection scope of the present application is not limited to the following embodiments, and the process parameters not specified in the following embodiments are usually according to the conventional conditions.

[0035] The end points and any values in the scope disclosed in the present application are not limited to the exact range or value, and the range or value should be understood as containing the values close to the range or value. For the numerical range, the end point values of each range, the end point values of each range and the individual point values, and the individual point values can be combined with each other to obtain one or more new numerical ranges, which should be regarded as specifically disclosed in the present application.

[0036] Example 1

[0037] The W1-100 industrial white oil, the polymethyl methacrylate viscosity index improver 7-310, the phosphoric acid trimethyl phenyl ester anti-wear agent T306, the benzene triazole derivative metal deactivator IR39, the dodecenyl succinic acid anti-rust agent T746 (the total acid value is 267mgKOH / g, and the pH value is 4.9), the 2,6-di-tert-butyl-p-cresol antioxidant T501, the polymethyl methacrylate pour point depressant 1-156 and the methyl silicone oil anti-foaming agent 1# composite anti-foaming agent are mixed, and stirred at 60±5℃ for 1-2 hours, and the blending is obtained. The railway speed reduction top ultra-low temperature special oil composition, and the adding amount of each component is shown in Table 1.

[0038] Table 1 The components and contents of each component in the railway speed reduction top ultra-low temperature special oil composition of example 1

[0039]

[0040]

[0041] The performance of the railway retarder super low temperature special oil composition prepared by blending in this example was tested, and the test results are shown in Table 2.

[0042] Table 2 Performance data of railway retarder super low temperature special oil composition of Example 1

[0043]

[0044] As can be seen from Table 2, the -40℃ kinematic viscosity of the railway retarder super low temperature special oil composition prepared in Example 1 is only 385.2 mm 2 / s, and the viscosity index is as high as 326, indicating that the railway retarder super low temperature special oil composition has excellent low temperature flowability and ultra-high viscosity index, which can effectively ensure the smooth operation of the retarder equipment in low temperature environment. The -40℃ kinematic viscosity of other railway retarder special oils on the market is greater than 600 mm 2 / s, which is much larger than the product.

[0045] Example 2

[0046] W1-100 industrial white oil, poly-methyl acrylate viscosity index improver 7-310, phosphoric acid trimethylphenyl ester anti-wear agent T306, benzene triazole derivative metal deactivator IR39, dodecenyl succinic acid anti-rust agent T746 (total acid value is 267 mgKOH / g, pH value is 4.9), 2,6-di-tert-butyl-p-cresol antioxidant T501, poly-methyl acrylate pour point depressant 1-156 and methyl silicone oil anti-foaming agent 1# compound anti-foaming agent were mixed and stirred at 60±5℃ for 1-2 hours to prepare a railway retarder super low temperature special oil composition, and the addition amount of each component is shown in Table 3.

[0047] Table 3 Each component and its content in the railway retarder super low temperature special oil composition of Example 2

[0048] Name Factory Quality parts / portion W1-100 industrial white oil Karamay Petrochemical 82.81 Viscosity index improver 7-310 Wincome 16 Anti-wear agent T306 Tianjin Lihai 0.05 Metal deactivator IR39 BASF 0.06 Antirust agent T746 King's Group 0.05 Antioxidant T501 Jinzhou Kangtai 0.5 Pour point depressant 1-156 Wincome 0.5 1# Compound antifoaming agent Shanghai Shenpu 0.03

[0049] The performance of the railway retarder super low temperature special oil composition prepared by blending in this example was tested, and the test results are shown in Table 4.

[0050] Table 4 Performance data of railway retarder super low temperature special oil composition of Example 2

[0051]

[0052] As can be seen from Table 4, the -40℃ kinematic viscosity of the railway retarder super low temperature special oil composition prepared in Example 2 is only 394.2 mm2 / s, the viscosity index is up to 353, and the low-temperature fluidity is excellent.

[0053] Example 3

[0054] W1-100 industrial white oil, polymethacrylate viscosity index improver 7-310, phosphoric acid trimethylphenyl ester anti-wear agent T306, benzotriazole derivative metal deactivator IR39, dodecenyl succinic acid anti-rust agent T746 (total acid value is 267 mgKOH / g, pH value is 4.9), 2,6-di-tert-butyl-p-cresol antioxidant T501, polymethyl methacrylate pour point depressant 1-156, and methyl silicone oil antifoam agent 1# complex antifoam agent were mixed, stirred at 60±5℃ for 1-2 hours, and blended to obtain a railway speed reducer top ultra-low temperature special oil composition. The addition amounts of the components are shown in Table 5.

[0055] Table 5: Components and their contents in the railway speed reducer top ultra-low temperature special oil composition of Example 3

[0056] Name Factory Quality parts / portion W1-100 industrial white oil Karamay Petrochemical 77.65 Viscosity index improver 7-310 Wincome 20 Anti-wear agent T306 Tianjin Lihai 0.1 Metal deactivator IR39 BASF 0.1 Antirust agent T746 King's Group 0.1 Antioxidant T501 Jinzhou Kangtai 1.0 Pour point depressant 1-156 Wincome 1.0 1# Compound antifoaming agent Shanghai Shenpu 0.05

[0057] The properties of the railway speed reducer top ultra-low temperature special oil composition prepared by blending in this example were tested, and the test results are shown in Table 6.

[0058] Table 6: Property data of the railway speed reducer top ultra-low temperature special oil composition of Example 3

[0059]

[0060]

[0061] As can be seen from Table 6, the -40℃ kinematic viscosity of the railway speed reducer top ultra-low temperature special oil composition prepared in Example 3 is only 421.4 mm 2 / s, the viscosity index is up to 393, which can effectively ensure the viscosity stability of the oil product.

[0062] From the property data of the railway speed reducer top ultra-low temperature special oil composition in Examples 1-3, it can be seen that the ultra-low temperature speed reducer special oil composition has excellent oxidation resistance, wear resistance, and rust resistance, especially excellent low-temperature fluidity and ultra-high viscosity index, and the oil product can pass all requirements of the OEM quality indicators.

[0063] Although the specific embodiments of the present application have been described in detail, those skilled in the art will understand that various modifications and substitutions can be made to those details based on all the teachings disclosed herein, and such changes are within the scope of protection of the present application. The entire scope of the present application is given by the appended claims and any equivalents thereof.

Claims

1. A special low-temperature oil composition for railway deceleration gearboxes, characterized in that, The composition comprises, by weight, the following components: 11-20 parts of viscosity index improver; Metal passivating agent 0.03-0.1 parts; Rust inhibitor 0.03-0.1 parts; Antioxidant 0.2-1.0 parts; Anti-wear agent 0.01-0.1 parts; 0.2-1.0 parts of pour point depressant; Antifoaming agent 0.01-0.05 parts; Base oil 77.65-88.52 parts; The viscosity index improver is polymethyl methacrylate VISCOPLEX 7-310; The pour point depressant is VISCOPLEX 1-156; The base oil is W1-100 industrial white oil; the kinematic viscosity of the W1-100 industrial white oil at 40°C is 1~2.5 mm. 2 / s, open flash point 100~120℃; The ultra-low temperature special oil composition for railway deceleration tops has a viscosity index greater than 340 and a pour point lower than -60℃.

2. The composition according to claim 1, characterized in that, The metal passivating agent is a benzotriazole derivative.

3. The composition according to claim 2, characterized in that, The kinematic viscosity of the benzotriazole derivative is 80 mm. 2 / s, with a nitrogen content of 14.6%.

4. The composition according to claim 1, characterized in that, The rust inhibitor is dodecenyl succinic acid.

5. The composition according to claim 1, characterized in that, The antioxidant is 2,6-di-tert-butyl-p-cresol.

6. The composition according to claim 1, characterized in that, The anti-wear agent is tricresyl phosphate.

7. The composition according to claim 6, characterized in that, The tricresyl phosphate has a phosphorus content of 11.7%, a wear scar diameter of 0.45 mm, and a Pb value of 540 N.

8. The composition according to claim 1, characterized in that, The antifoaming agent is methyl silicone oil or phosphate ester.

9. The composition according to claim 8, characterized in that, The antifoaming agent is methyl silicone oil.

10. A method for preparing the railway deceleration top cryogenic oil composition according to any one of claims 1 to 9, characterized in that, The method includes: Mix the viscosity index improver, metal passivator, rust inhibitor, antioxidant, anti-wear agent, pour point depressant, antifoaming agent and base oil evenly.

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