A high-temperature-resistant extreme-pressure turbine oil composition, a preparation method and application thereof

Abstract

This invention discloses a high-temperature resistant extreme-pressure turbine oil composition, its preparation method, and its application, belonging to the field of lubricating oil technology. By weight, the raw materials of the turbine oil composition include: 0.5-3 parts of an extreme-pressure anti-wear agent, wherein the extreme-pressure anti-wear agent is triphenyl thiophosphate; 0.4-2 parts of a composite additive, wherein the composite additive is selected from at least one of HiTEC 2505, Irgapac T1668M, IRGOLUBE 2030D, RC9321, or RP-T6012; and 0.005-0.03 parts of an anti-foaming agent. This invention effectively solves the problem in the prior art that extreme-pressure turbine oils cannot simultaneously exhibit excellent oxidation stability, thermal stability, and extreme-pressure anti-wear performance under harsh operating conditions such as high-temperature gas turbines and compressors with geared devices, and can be applied in industrial turbines.

Description

Technical Field

[0001] This invention belongs to the field of lubricating oil technology, specifically relating to high-temperature resistant extreme pressure turbine oil compositions, their preparation methods, and applications. Background Technology

[0002] With the development of equipment technology, turbines such as gas turbines and air compressors are developing towards larger capacity and higher efficiency. The operating temperature is getting higher and the workload is getting heavier. They are usually equipped with speed control systems such as gearboxes, which puts forward higher requirements for the high temperature thermal stability, high temperature oxidation stability, sludge precipitation control and extreme pressure lubrication performance of oils.

[0003] Extreme pressure anti-wear agents are active additives that are prone to decomposition at high temperatures. They react with metal surfaces to produce metal salts, which accelerate sludge deposition. If the extreme pressure agent is not selected properly, it can accelerate oil deterioration, affect oil life, and pose a threat to the safe and stable long-term operation of equipment.

[0004] Chinese Invention Patent Publication CN 115305130 A discloses an extreme pressure turbine oil composition with low sludge precipitation tendency, its preparation method, and its uses. The extreme pressure turbine oil composition with low sludge precipitation tendency is obtained by compounding a sulfur-containing agent with high acidity and high activity with a liquid benzotriazole amine salt friction coefficient improver. The high-temperature oxidation stability test (120℃) life (25% oxygen bomb) is between 800 and 900 hours, and the sludge content (25% oxygen bomb, 1μm filter membrane) is at the level of 100 to 130 mg / kg. The oxidation stability test (120℃) life (50% oxygen bomb), sludge content (50% oxygen bomb, 1μm filter membrane), and the thermal stability of the oil at high temperature were not investigated. Summary of the Invention

[0005] One of the technical problems this invention aims to solve is the issue that extreme pressure turbine oils, when used in turbines with transmission equipment such as gearboxes, are prone to sludge formation, thus affecting their service life. This invention provides a high-temperature resistant extreme pressure turbine oil composition with a low acid value, suitable active extreme pressure anti-wear agents, or a compound of benzotriazole friction modifiers. Besides possessing good extreme pressure anti-wear properties, this composition also exhibits good oxidation stability, thermal stability, and a low tendency for sludge precipitation. A second technical problem this invention aims to solve is to provide a method for preparing a high-temperature resistant extreme pressure turbine oil composition corresponding to the first technical problem. A third technical problem this invention aims to solve is to provide an application of the high-temperature resistant extreme pressure turbine oil composition corresponding to the first technical problem.

[0006] To solve the first technical problem, the present invention adopts the following technical solution:

[0007] This invention proposes a high-temperature resistant extreme pressure turbine oil composition, comprising, by weight: 0.5-3 parts of an extreme pressure anti-wear agent, wherein the extreme pressure anti-wear agent is triphenyl thiophosphate; 0.4-2 parts of a composite additive, wherein the composite additive is selected from at least one of HiTEC 2505, Irgapac T1668M, IRGOLUBE 2030D, RC9321 or RP-T6012; and 0.005-0.03 parts of an antifoaming agent.

[0008] As a preferred technical solution, the triphenyl thiophosphate is selected from at least one of T309, Irgalube 232, and IrgalubeTPPT.

[0009] As a preferred technical solution, the antifoaming agent is selected from at least one of AF201, FOAM BAN 130B, and FOAM BAN 155.

[0010] As a preferred technical solution, the raw materials of the turbine oil composition further include: 0.01 to 0.2 parts of a friction coefficient improver. Preferably, the friction improver is selected from at least one of HL-T406E and BY-T406E.

[0011] As a preferred technical solution, the raw materials for the turbine oil composition further include: base oil, 94.77 to 99.08 parts. Preferably, the base oil is one of HVI Group II base oil, HVI Group III base oil, or synthetic base oil.

[0012] As a preferred technical solution, the turbine oil composition comprises the following components by weight percentage:

[0013] Composite agent 0.4%–2%; extreme pressure anti-wear agent 0.5%–3%; friction coefficient improver 0.01%–0.2%; antifoaming agent 0.005%–0.03%; balance is base oil.

[0014] To solve the second technical problem, the present invention adopts the following technical solution:

[0015] A method for preparing the aforementioned high-temperature resistant extreme pressure turbine oil composition includes the following steps:

[0016] The raw materials containing extreme pressure anti-wear agent, composite additive and base oil are first mixed, then heated to 55-60℃ and stirred for 1-2 hours. Then an antifoaming agent is added and stirred for 0.5-1 hour. After filtration, a high temperature resistant extreme pressure turbine oil composition is obtained.

[0017] As a preferred technical solution, the composite additive, extreme pressure anti-wear agent, friction coefficient improver and base oil are mixed evenly, heated to 55-60°C and stirred for 1-2 hours until the additive is completely dissolved, an anti-foaming agent is added, and the mixture is stirred for 0.5-1 hours and filtered to obtain the high-temperature resistant extreme pressure turbine oil composition.

[0018] To solve the third technical problem, the technical solution adopted by this invention is as follows:

[0019] The aforementioned high-temperature resistant extreme pressure turbine oil composition is used for the lubrication of turbine equipment, preferably for the lubrication of turbine equipment under harsh operating conditions such as high-temperature gas turbines and compressors with geared devices.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] This invention provides a universal extreme pressure anti-wear agent solution for turbine oils. This solution uses a low-acid-value, appropriately active extreme pressure anti-wear agent or a compound benzotriazole friction modifier to obtain a turbine oil composition that exhibits good extreme pressure anti-wear performance while improving the rotating bomb oxidation and reducing sludge precipitation. This technical solution has minimal impact on the oil's acid value. It overcomes the problems of decreased rotating bomb oxidation and high sludge precipitation caused by the use of high-activity, high-acid-value sulfur-phosphorus extreme pressure anti-wear agents in the past. It achieves a good balance between the oil's high-temperature oxidation stability, thermal oxidation stability, and extreme pressure performance. Test examples show that the turbine oil composition of this invention has a gearbox failure level >9, a Dry-TOST test life (at 50% bomb oxidation) >800 hours, and sludge <100 mg / kg. Furthermore, this technology demonstrates excellent thermal stability and sludge control capabilities in simulated aging tests in a 150°C high-temperature oven. It achieves a good balance in oxidation stability, thermal stability, sludge precipitation control, and extreme pressure anti-wear performance.

[0022] This invention effectively solves the problem in the prior art that extreme pressure turbine oils cannot simultaneously exhibit excellent oxidation stability, thermal stability, high-temperature corrosion resistance, sludge control capability, and extreme pressure anti-wear performance under harsh operating conditions such as high-temperature gas turbines and compressors with geared devices, and can be applied in industrial turbines. Detailed Implementation

[0023] The present invention will be further illustrated below through examples, but not in a way that limits the invention.

[0024] The sources of raw materials in this embodiment and comparative example are:

[0025] HiTEC 2505, Afton; RC9321, Lanxess Chemicals (China) Co., Ltd.; Triphenyl thiophosphate Irgalube232 (IR 232), IR2030D, BASF; Triphenyl thiophosphate T309, Jinzhou Shengda Chemicals Co., Ltd.; Organosulfur and phosphorus compounds V727, Vanderbilt; Dialkyl dithiophosphate Irgalube353 (IR353), Jilin Yafeng; Thiophosphate amine salts T307, Phosphate amine salts T308, Benzotriazole fatty amine salts HL-T406E, Shenyang Hualun Lubricating Oil Additives Co., Ltd.; Composite antifoaming agent AF201, Sinopec Lubricating Oil Company; Siloxane antifoaming agent FB130B, Composite antifoaming agent FB155, Mengqingxin; HVI II+6, HVI III 6, Maoming Petrochemical.

[0026] Example 1

[0027] A high-temperature resistant extreme-pressure turbine oil composition, comprising the following components by weight:

[0028] Compound additive: HiTEC 2505, 1.0 part;

[0029] Extreme pressure anti-wear agent: T309, 2 parts;

[0030] The antifoaming agent includes: AF201, 0.01 parts;

[0031] Base oil: HVI II+6, 96.99 parts.

[0032] The weight percentage data of the extreme pressure turbine oil composition in this embodiment are recorded in Table 1.

[0033] The specific method for preparing the extreme pressure turbine oil composition in this embodiment is as follows:

[0034] After the composite additive, extreme pressure anti-wear agent, friction coefficient improver and base oil are mixed evenly, the mixture is heated to 55-60°C and stirred for 1-2 hours until the additive is completely dissolved. Then, an antifoaming agent is added and stirred for 0.5-1 hour. The mixture is then filtered to obtain the high-temperature extreme pressure turbine oil composition.

[0035] Examples 2-5, Comparative Examples 1-4

[0036] The preparation methods of the turbine oil compositions in Examples 2 to 4 and Comparative Examples 1 to 4 are the same as those in Example 1, except for the components. The composition of each component is shown in Table 1.

[0037] Table 1 Data for each component by weight (parts)

[0038]

[0039] The performance of Examples 1-5 and Comparative Examples 1-4 was evaluated and tested using the following methods: lubricating oil viscosity test (GB / T 265), copper strip corrosion test (GB / T 5096), wear scar diameter test (NB / SH / T 0189), maximum non-seize load test (GB / T 3142), load-bearing capacity test (SH / T 0306), rotating oxygen bomb test (SH / T 0193), high-temperature oxidation stability test (Dry-Tost, ASTM D7873), thermal aging stability test (oven temperature 150℃, aging for 48 hours), and sludge content test (SH / T 0565). The results of extreme pressure anti-wear performance, rust prevention performance, anti-foaming performance, demulsification performance, and oxidation stability of Examples 1-5 and Comparative Examples 1 and 2 are shown in Table 2.

[0040] Table 2 Performance data of extreme pressure turbine oil compositions in Examples 1-5 and Comparative Examples 1-4

[0041]

[0042]

[0043] As shown in Table 2, the gear failure level of Examples 1-5 is >9, the rotating oxygen bomb test lasts >1600 min, and the high-temperature corrosion test is qualified. While ensuring extreme pressure performance, it can pass the high-temperature corrosion test. The Dry-TOST test life (at 50% oxygen bomb) is greater than 800 h, the sludge is less than 100 mg / kg, and the thermal stability is good. This solves the problem of turbine oil having extreme pressure performance under high-temperature conditions while also taking into account the oxygen bomb decay rate, low sludge tendency, and thermal stability of the oil. Compared with Comparative Examples 1-4, this product has significant advantages in oxidation stability, thermal stability, sludge precipitation control capability, and high-temperature life.

Claims

1. A turbine oil composition, comprising, by weight: 0.5 to 3 parts of extreme pressure anti-wear agent, wherein the extreme pressure anti-wear agent is triphenyl thiophosphate; A composite additive, 0.4 to 2 parts, wherein the composite additive is selected from at least one of HiTEC 2505, Irgapac T1668M, IRGOLUBE2030D, RC9321 or RP-T6012; Antifoaming agent 0.005-0.03 parts.

2. The turbine oil composition according to claim 1, characterized in that, The triphenyl thiophosphate is selected from at least one of T309, Irgalube 232, and Irgalube TPPT.

3. The turbine oil composition according to claim 1 or 2, characterized in that, The antifoaming agent is selected from siloxanes or siloxanes combined with acrylates as antifoaming agents.

4. The turbine oil composition according to any one of claims 1-3, characterized in that, The raw materials of the turbine oil composition also include: 0.01 to 0.2 parts of friction coefficient improver.

5. The turbine oil composition according to claim 4, characterized in that, The friction modifier is selected from benzotriazole fatty amine salts.

6. The turbine oil composition according to any one of claims 1-5, characterized in that, The raw materials for the turbine oil composition also include: base oil, 94.77 to 99.08 parts.

7. The turbine oil composition according to claim 6, characterized in that, The base oil is one of HVI Group II base oil, HVI Group III base oil, or synthetic base oil.

8. The turbine oil composition according to any one of claims 1-6, characterized in that, The turbine oil composition comprises, by weight percentage: Compound agent 0.4%–2%; Extreme pressure anti-wear agent 0.5%–3%; Friction coefficient improver: 0.01%–0.2%; Antifoaming agent 0.005%–0.03%; The balance is base oil.

9. A method for preparing the turbine oil composition according to any one of claims 1-8, comprising the steps of: The extreme pressure anti-wear agent and composite additive are first mixed, then heated to 55-60°C, stirred for 1-2 hours, then an anti-foaming agent is added, stirred for 0.5-1 hour, and filtered to obtain the turbine oil composition.

10. The application of the turbine oil composition according to any one of claims 1-8, characterized in that, For lubrication of turbine equipment, the turbine equipment being selected from a gas turbine or compressor with gears.

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