Aviation hydraulic oil composition and preparation method thereof

Abstract

The invention discloses an aviation hydraulic oil composition and also discloses a preparation method for aviation hydraulic oil, which comprises the following steps: respectively weighing the following components in percentage by weight: 90%-97% of base oil, 2%-10% of viscosity index improver, 0.01%-1.0% of antioxidant, 0.05%-1.0% of extreme pressure anti-wear agent, 0.005%-0.2% of antirust agent, 0.001%-0.1% of anti-foaming agent and 0.0001%-0.1% of red dye; the preparation method comprises the following steps: adding the base oil into a reaction kettle, heating the reaction kettle to 50-60 DEG C, sequentially adding the viscosity index improver, the antioxidant, the anti-wear reagent at extreme pressure, the anti-rust agent, the anti-foaming agent and the dye agent into the reaction kettle, carrying out pulse stirring for 2 hours, maintaining the temperature of 50-60 DEG C for 1-2 hours to prepare semi-finished hydraulic oil, cooling the semi-finished hydraulic oil to 40-45 DEG C, and carrying out cooling to obtain the finished hydraulic oil. By means of the aviation hydraulic oil composition and the preparation method thereof, the problems that an aviation hydraulic oil composition is poor in abrasion resistance and rust resistance are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of lubricating oils, and in particular relates to an aviation hydraulic oil composition. The present invention also relates to a method for preparing the aviation hydraulic oil. Background Art

[0002] my country's petroleum-based aviation hydraulic oils include No. 10 aviation hydraulic oil, No. 12 aviation hydraulic oil and No. 15 aviation hydraulic oil. Among them, No. 10 aviation hydraulic oil is divided into air use and ground use. No. 10 aviation hydraulic oil for ground use has excellent low-temperature fluidity, viscosity-temperature characteristics, corrosion and rust resistance, and oxidation stability. It is mainly suitable for various mechanical equipment, airport ground supporting equipment, and marine lifting equipment in cold areas in winter. According to statistics, about 80% of the scrapped parts of mechanical equipment are caused by wear. The hydraulic system of ground machinery is prone to wear under certain pressure and temperature. If a lubricant with good anti-wear performance is used, the machinery can be fully lubricated, the friction and wear between parts can be reduced, and sintering can be prevented, thereby improving mechanical efficiency, reducing energy consumption, and extending the service life of the machinery. Therefore, in order to protect the normal operation of hydraulic pumps and hydraulic systems, it is very important to improve and improve the anti-wear properties of aviation hydraulic oil, reduce friction and wear, and prevent sintering. A Chinese invention patent discloses a ground-use No. 10 aviation hydraulic oil and its preparation method with application publication number CN112708494A. The hydraulic oil meets the specification requirements of Q / SY YM0024-2000. Q / SY YM 0024-2000 "No. 10 General Hydraulic Oil" is an enterprise standard approved by the Yumen Oilfield Branch of China National Petroleum Corporation in 2000. This standard stipulates the technical requirements for ground-use No. 10 aviation hydraulic oil, but does not have corresponding requirements for anti-wear properties. The extreme pressure anti-wear agent component described in the patent is a mixture of one or more of sulfur-containing compounds, phosphorus-containing compounds, sulfur-phosphorus compounds, etc., and the rust inhibitor is a mixture of one or more of sulfonates, carboxylic acids and carboxylates, etc., but it does not solve the antagonism problem caused by the combined use of extreme pressure anti-wear agents and rust inhibitors.

[0003] Therefore, in the face of the current status of aviation hydraulic oil, developing an aviation hydraulic oil with excellent anti-wear and rust resistance and no extreme pressure anti-wear agent and rust inhibitor confrontation problem has become an important research direction for researchers. Summary of the invention

[0004] The purpose of the present invention is to provide an aviation hydraulic oil to solve the technical problems of poor rust resistance and poor wear resistance of the existing aviation hydraulic oil.

[0005] Another object of the present invention is to provide a method for preparing the above-mentioned aviation hydraulic oil.

[0006] The technical solution adopted by the present invention is an aviation hydraulic oil composition, which is characterized in that it consists of the following components by weight percentage: 90% to 97% of base oil, 2% to 10% of viscosity index improver, 0.01% to 1.0% of antioxidant, 0.05% to 1.0% of extreme pressure anti-wear agent, 0.005% to 0.2% of rust inhibitor, 0.001% to 0.1% of anti-foaming agent, and 0.0001% to 0.1% of dye, and the sum of the weight percentages of the above components is 100%.

[0007] Another technical solution adopted by the present invention is that the preparation method of the above-mentioned aviation hydraulic oil composition is carried out according to the following steps:

[0008] Step 1: Weigh the following components by weight: 90% to 97% base oil, 2% to 10% viscosity index improver, 0.01% to 1.0% antioxidant, 0.05% to 1.0% extreme pressure antiwear agent, 0.005% to 0.2% rust inhibitor, 0.001% to 0.1% antifoaming agent, 0.0001% to 0.1% red dye, and the sum of the weight percentages of the above components is 100%;

[0009] Step 2: Add the base oil into the reactor, heat the reactor to 50°C to 60°C, then sequentially add the viscosity index improver, antioxidant, extreme pressure anti-wear agent, rust inhibitor, anti-foaming agent and dye agent into the reactor, pulse stir for 2 hours, and maintain the temperature at 50°C to 60°C for 1 to 2 hours to obtain a semi-finished hydraulic oil;

[0010] Step 3: Cooling the semi-finished hydraulic oil to 40° C. to 45° C., filtering it, and then naturally cooling it to room temperature to obtain aviation hydraulic oil.

[0011] The present invention is also characterized in that:

[0012] The rust inhibitor is a mixture of two components, alkylnaphthalene sulfonate and alkyl imidazoline, wherein the weight ratio of the alkylnaphthalene sulfonate to the alkyl imidazoline is 1 to 5:1, or a mixture of two components, petroleum sulfonate and benzotriazolyl alkylamine salt, wherein the weight ratio of the petroleum sulfonate to the benzotriazolyl alkylamine salt is 5:1 to 3, or a mixture of two components, petroleum sulfonate and alkyl imidazoline, wherein the weight ratio of the petroleum sulfonate to the alkyl imidazoline is 1 to 3:1, or a mixture of three components, alkylnaphthalene sulfonate, petroleum sulfonate and alkyl imidazoline, wherein the weight ratio of the alkylnaphthalene sulfonate to the petroleum sulfonate is The weight ratio of the alkyl imidazoline to the alkyl sulfonate is 1-3:1, and the weight ratio of the petroleum sulfonate to the alkyl imidazoline is 1-2:1; or it is a mixture of three components consisting of alkyl naphthalene sulfonate, alkyl imidazoline and benzotriazolyl alkylamine salt, wherein the weight ratio of the alkyl naphthalene sulfonate to the alkyl imidazoline is 3-5:1, and the weight ratio of the alkyl imidazoline to the benzotriazolyl alkylamine salt is 1-2:1; or it is a mixture of three components consisting of petroleum sulfonate, alkyl imidazoline and benzotriazolyl alkylamine salt, wherein the weight ratio of the petroleum sulfonate to the alkyl imidazoline is 3-5:1, and the weight ratio of the alkyl imidazoline to the benzotriazolyl alkylamine salt is 1-2:1.

[0013] The extreme pressure anti-wear agent is a compound mixture of triphenyl phosphate and chlorine-nitrogen-sulfur heterocyclic derivatives, and the weight ratio of the two is 1:0.2-3.

[0014] The beneficial effect of the present invention is that the present invention improves the anti-wear property of aviation hydraulic oil and maintains excellent anti-rust property by compounding extreme pressure anti-wear agents and reasonably matching them with rust inhibitors. DETAILED DESCRIPTION

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

[0016] The aviation hydraulic oil composition of the present invention comprises the following components by weight percentage: 90% to 97% of light base oil, 2% to 10% of viscosity index improver, 0.01% to 1.0% of antioxidant, 0.05% to 1.0% of extreme pressure anti-wear agent, 0.005% to 0.2% of rust inhibitor, 0.001% to 0.1% of anti-foam agent, and 0.0001% to 0.1% of dye, and the sum of the weight percentages of the above components is 100%.

[0017] The light base oil is at least one of paraffinic crude oil, intermediate base crude oil or naphthenic crude oil, which is a product obtained by first atmospheric and vacuum distillation and then hydrogenation process.

[0018] Preferably, the base oil has a kinematic viscosity of 2 mm at 40°C. 2 / s~4mm 2 / s, acid value is 0.001mgKOH / g~0.01mgKOH / g, pour point is not higher than -36℃, open flash point is not lower than 92℃.

[0019] The viscosity index improver is any one or a mixture of polymethacrylate, ethylene-propylene copolymer, olefin copolymer or polyisobutylene. Preferably, the viscosity index improver is polymethacrylate, and the amount used is 3% to 8% of the total dosage of the composition.

[0020] The rust inhibitor is a mixture of two components, alkylnaphthalene sulfonate and alkyl imidazoline, wherein the weight ratio of the alkylnaphthalene sulfonate to the alkyl imidazoline is 1 to 5:1, or a mixture of two components, petroleum sulfonate and benzotriazolyl alkylamine salt, wherein the weight ratio of the petroleum sulfonate to the benzotriazolyl alkylamine salt is 5:1 to 3, or a mixture of two components, petroleum sulfonate and alkyl imidazoline, wherein the weight ratio of the petroleum sulfonate to the alkyl imidazoline is 1 to 3:1, or a mixture of three components, alkylnaphthalene sulfonate, petroleum sulfonate and alkyl imidazoline, wherein the weight ratio of the alkylnaphthalene sulfonate to the petroleum sulfonate is The weight ratio of the alkyl imidazoline to the alkyl sulfonate is 1-3:1, and the weight ratio of the petroleum sulfonate to the alkyl imidazoline is 1-2:1; or it is a mixture of three components consisting of alkyl naphthalene sulfonate, alkyl imidazoline and benzotriazolyl alkylamine salt, wherein the weight ratio of the alkyl naphthalene sulfonate to the alkyl imidazoline is 3-5:1, and the weight ratio of the alkyl imidazoline to the benzotriazolyl alkylamine salt is 1-2:1; or it is a mixture of three components consisting of petroleum sulfonate, alkyl imidazoline and benzotriazolyl alkylamine salt, wherein the weight ratio of the petroleum sulfonate to the alkyl imidazoline is 3-5:1, and the weight ratio of the alkyl imidazoline to the benzotriazolyl alkylamine salt is 1-2:1.

[0021] The extreme pressure anti-wear agent is a mixture of two components: triaryl phosphate and chlorine-nitrogen-sulfur heterocyclic derivatives. The weight ratio of the triaryl phosphate to the chlorine-nitrogen-sulfur heterocyclic derivative is 1:0.2-3.

[0022] The structure of the chlorine-nitrogen-sulfur heterocyclic derivative is as follows:

[0023]

[0024] Where n=0~6.

[0025] The chlorine element in the chlorine-nitrogen-sulfur heterocyclic derivatives chemically adsorbs or reacts with the metal surface to form a protective film, which has excellent anti-wear and extreme pressure effects. The nitrogen-sulfur heterocyclic combines active elements such as nitrogen and sulfur, and the molecular structure is compact and stable. The nitrogen and sulfur atoms contain lone pairs of electrons, which can cooperate with the empty orbits of metal atoms and adsorb on the metal surface to play a friction-reducing and anti-wear role, overcoming the limitation of traditional extreme pressure anti-wear agents that cause serious metal corrosion. Triaryl phosphates have excellent anti-wear properties and low corrosiveness. When combined with chlorine-nitrogen-sulfur heterocyclic derivatives, aviation hydraulic oil has excellent anti-wear properties.

[0026] The antioxidant is any one of phenolic antioxidants and aromatic amine antioxidants or a mixture of several of them.

[0027] Preferably, the phenolic antioxidant is an alkyl hindered phenol, and the aromatic amine antioxidant is any one of alkyl diphenylamine and alkyl phenyl-α-naphthylamine.

[0028] More preferably, the antioxidant is a mixture of two components consisting of alkyl diphenylamine and alkyl hindered phenol, the weight ratio of alkyl diphenylamine to alkyl hindered phenol is 1:0.5-8, or a mixture of two components consisting of alkyl phenyl-α-naphthylamine and alkyl hindered phenol, the weight ratio of alkyl phenyl-α-naphthylamine to alkyl hindered phenol is 0.5-8, or a mixture of two components consisting of alkyl diphenylamine and alkyl phenyl-α-naphthylamine, the weight ratio of alkyl diphenylamine to alkyl phenyl-α-naphthylamine is 1:0.5-2.

[0029] The antifoaming agent is any one of silicon-containing antifoaming agents and non-silicon antifoaming agents or a mixture of several of them.

[0030] Preferably, the anti-foaming agent is polymethacrylate, and the amount of methylsiloxane used is 0.001% to 1% of the total dosage of the composition.

[0031] The dye is an azo compound. The red dye is added to distinguish the ground-use No. 10 aviation hydraulic oil from the ordinary hydraulic oil, to prevent the mixing of oil products and to facilitate the identification of leakage of the ground-use No. 10 aviation hydraulic oil.

[0032] The preparation method of the aviation hydraulic oil of the present invention is specifically implemented according to the following steps:

[0033] Step 1: Weigh the following components respectively by weight percentage: 90% to 97% base oil, 2% to 10% viscosity index improver, 0.01% to 1.0% antioxidant, 0.05% to 1.0% extreme pressure anti-wear agent, 0.005% to 0.2% rust inhibitor, 0.001% to 0.1% anti-foaming agent, 0.0001% to 0.1% dye, and the sum of the weight percentages of the above components is 100%.

[0034] Step 2: Add the base oil into the reactor, heat the reactor to 50°C to 60°C, then sequentially add the viscosity index improver, antioxidant, extreme pressure anti-wear agent, rust inhibitor, anti-foaming agent and dye into the reactor, pulse stir for 2 hours, and maintain the temperature at 50°C to 60°C for 1 to 2 hours to obtain the semi-finished hydraulic oil.

[0035] Step 3: Cooling the semi-finished hydraulic oil to 40-45° C., filtering it, and then naturally cooling it to room temperature to obtain aviation hydraulic oil.

[0036] Embodiment 1:

[0037] Add base oil to the reactor, then heat the reactor to 50°C to 60°C, then sequentially add the viscosity index improver, antioxidant, extreme pressure anti-wear agent, rust inhibitor, anti-foaming agent and dye agent to the reactor, pulse stir for 2 hours, and keep 50°C to 60°C for 1 to 2 hours to obtain semi-finished hydraulic oil, cool the semi-finished hydraulic oil to 40 to 45°C, filter it, and then naturally cool it to room temperature to obtain aviation hydraulic oil, which has the following composition:

[0038] Table 1 Composition and proportion of hydraulic oil composition of Example 1

[0039]

[0040] Embodiment 2:

[0041] Add base oil to the reactor, then heat the reactor to 50°C to 60°C, then sequentially add the viscosity index improver, antioxidant, extreme pressure anti-wear agent, rust inhibitor, anti-foaming agent and dye agent to the reactor, pulse stir for 2 hours, and keep 50°C to 60°C for 1 to 2 hours to obtain semi-finished hydraulic oil, cool the semi-finished hydraulic oil to 40 to 45°C, filter it, and then naturally cool it to room temperature to obtain aviation hydraulic oil, which has the following composition:

[0042] Table 2 Composition and proportion of hydraulic oil composition in Example 2

[0043]

[0044]

[0045] Embodiment 3:

[0046] Add base oil to the reactor, then heat the reactor to 50°C to 60°C, then sequentially add the viscosity index improver, antioxidant, extreme pressure anti-wear agent, rust inhibitor, anti-foaming agent and dye agent to the reactor, pulse stir for 2 hours, and keep 50°C to 60°C for 1 to 2 hours to obtain semi-finished hydraulic oil, cool the semi-finished hydraulic oil to 40 to 45°C, filter it, and then naturally cool it to room temperature to obtain aviation hydraulic oil, which has the following composition:

[0047] Table 3 Composition and proportion of hydraulic oil composition of Example 3

[0048]

[0049]

[0050] Embodiment 4:

[0051] Add base oil to the reactor, then heat the reactor to 50°C to 60°C, then sequentially add the viscosity index improver, antioxidant, extreme pressure anti-wear agent, rust inhibitor, anti-foaming agent and dye agent to the reactor, pulse stir for 2 hours, and keep 50°C to 60°C for 1 to 2 hours to obtain semi-finished hydraulic oil, cool the semi-finished hydraulic oil to 40 to 45°C, filter it, and then naturally cool it to room temperature to obtain aviation hydraulic oil, which has the following composition:

[0052] Table 4 Composition and proportion of hydraulic oil composition in Example 4

[0053]

[0054]

[0055] Embodiment 5:

[0056] Add base oil to the reactor, then heat the reactor to 50°C to 60°C, then sequentially add the viscosity index improver, antioxidant, extreme pressure anti-wear agent, rust inhibitor, anti-foaming agent and dye agent to the reactor, pulse stir for 2 hours, and keep 50°C to 60°C for 1 to 2 hours to obtain semi-finished hydraulic oil, cool the semi-finished hydraulic oil to 40 to 45°C, filter it, and then naturally cool it to room temperature to obtain aviation hydraulic oil, which has the following composition:

[0057] Table 5 Composition and proportion of hydraulic oil composition in Example 5

[0058]

[0059]

[0060] Embodiment 6:

[0061] Add base oil to the reactor, then heat the reactor to 50°C to 60°C, then sequentially add the viscosity index improver, antioxidant, extreme pressure anti-wear agent, rust inhibitor, anti-foaming agent and dye agent to the reactor, pulse stir for 2 hours, and keep 50°C to 60°C for 1 to 2 hours to obtain semi-finished hydraulic oil, cool the semi-finished hydraulic oil to 40 to 45°C, filter it, and then naturally cool it to room temperature to obtain aviation hydraulic oil, which has the following composition:

[0062] Table 6 Composition and proportion of hydraulic oil composition of Example 6

[0063]

[0064]

[0065] Performance Testing:

[0066] 1. Anti-wear test: The hydraulic oil produced in Examples 1-6 was used for anti-wear ability test. The determination method was based on SH / T 0189-92. The spot diameter was tested under a pressure of 392N for 60min. The test results are recorded in Table 7.

[0067] 2. Wear test: The hydraulic oil produced in Examples 1-6 was used for wear test. The determination method was based on JB / T7040-1993. The test lasted for 100 hours. The total weight loss of the test object was recorded in Table 7.

[0068] 3. Corrosion test: The hydraulic oil produced in Examples 1-6 was used for corrosion test. The determination method was in accordance with GB / T19291-2003. The test was conducted at 0±2°C for 24 hours. The number of test subjects rated no more than 2 was recorded in Table 7.

[0069] 4. Rust test: The hydraulic oils produced in Examples 1-6 were used for corrosion test in synthetic seawater for 24 hours. The number of qualified products was recorded in Table 7.

[0070] Table 7 Test results of Example compositions

[0071]

[0072] In summary, the compositions prepared in Examples 1-6 can meet the requirements of Q / SY YM 0024-2000, and the wear spot diameter of the four-ball wear tester (392N, 60min, 75°C, 1200r / min) is no more than 0.8mm, the total weight loss of the Vickers 104C vane pump test for 100h is no more than 100mg, the corrosion test (70±2°C, 24h) is rated no more than 2, and the liquid phase rust test (synthetic seawater, 24h) is qualified.

Claims

1. An aviation hydraulic oil composition, characterized in that: The invention is composed of the following components by weight percentage: 90% to 97% base oil, 2% to 10% viscosity index improver, 0.01% to 1.0% antioxidant, 0.05% to 1.0% extreme pressure anti-wear agent, 0.005% to 0.2% rust inhibitor, 0.001% to 0.1% anti-foaming agent, 0.0001% to 0.1% dye, and the sum of the weight percentages of the above components is 100%.

2. The aviation hydraulic oil composition according to claim 1, characterized in that: The rust inhibitor is a compound mixture of alkyl naphthalene sulfonate and alkyl imidazoline, and the weight ratio of the two is 1 to 5:

1.

3. The aviation hydraulic oil composition according to claim 1, characterized in that: The rust preventive is a compound mixture of petroleum sulfonate and benzotriazolidine alkylamine salt, and the weight ratio of the two is 5:1-3.

4. The aviation hydraulic oil composition according to claim 1, characterized in that: The rust inhibitor is a compound mixture of petroleum sulfonate and alkyl imidazoline, and the weight ratio of the two is 1 to 3:

1.

5. The aviation hydraulic oil composition according to claim 1, characterized in that: The rust inhibitor is a compound mixture of alkylnaphthalene sulfonate, petroleum sulfonate and alkyl imidazoline, wherein the weight ratio of alkylnaphthalene sulfonate to petroleum sulfonate is 1-3:1, and the weight ratio of petroleum sulfonate to alkyl imidazoline is 1-2:

1.

6. The aviation hydraulic oil composition according to claim 1, characterized in that: The rust inhibitor is a compound mixture of alkylnaphthalene sulfonate, alkylimidazoline and benzotriazolylamine salt, wherein the weight ratio of alkylnaphthalene sulfonate to alkylimidazoline is 3-5:1, and the weight ratio of alkylimidazoline to benzotriazolylamine salt is 1-2:

1.

7. The aviation hydraulic oil composition according to claim 1, characterized in that: The rust inhibitor is a compound mixture of petroleum sulfonate, alkyl imidazoline and benzotriazolyl alkylamine salt, wherein the weight ratio of petroleum sulfonate to alkyl imidazoline is 3-5:1, and the weight ratio of alkyl imidazoline to benzotriazolyl alkylamine salt is 1-2:

1.

8. The aviation hydraulic oil composition according to claim 1, characterized in that: The extreme pressure anti-wear agent is a compound mixture of triphenyl phosphate and chlorine-nitrogen-sulfur heterocyclic derivatives, and the weight ratio of the two is 1:0.2-3.

9. A method for preparing aviation hydraulic oil, characterized in that: Please follow the steps below to implement: Step 1: Weigh the following components by weight: 90% to 97% base oil, 2% to 10% viscosity index improver, 0.01% to 1.0% antioxidant, 0.05% to 1.0% extreme pressure antiwear agent, 0.005% to 0.2% rust inhibitor, 0.001% to 0.1% antifoaming agent, 0.0001% to 0.1% red dye, and the sum of the weight percentages of the above components is 100%; Step 2: Add the base oil into the reactor, heat the reactor to 50°C to 60°C, then sequentially add the viscosity index improver, antioxidant, extreme pressure anti-wear agent, rust inhibitor, anti-foaming agent and dye agent into the reactor, pulse stir for 2 hours, and maintain the temperature at 50°C to 60°C for 1 to 2 hours to obtain a semi-finished hydraulic oil; Step 3: Cooling the semi-finished hydraulic oil to 40-45° C., filtering it, and then naturally cooling it to room temperature to obtain aviation hydraulic oil.

10. The method for preparing aviation hydraulic oil according to claim 9, characterized in that: The rate of the pulse stirring in step 2 is 20 pulses / minute.

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