Open gear lubricating oil and preparation method thereof

Abstract

The invention relates to the technical field of lubricating oil, in particular to exposed gear lubricating oil and a preparation method thereof. The base oil, the polyisobutene, the petroleum calcium sulfonate, the nano-scale light calcium carbonate and other raw materials are mixed, the petroleum calcium sulfonate, the nano-scale light calcium carbonate and the melamine cyanurate can improve the extreme pressure anti-wear performance and the adhesiveness of a mixture, and the polyisobutene can effectively improve the adhesiveness; meanwhile, the petroleum calcium sulfonate improves extremely high corrosion resistance of the composition, and the composition does not contain molybdenum disulfide, graphite, asphalt and other substances, so that the problem of environmental pollution caused by black color of current mainstream open gear lubricating oil is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of lubricating oils, and particularly relates to an open gear lubricating oil and a preparation method thereof. Background Art

[0002] Open gears are widely used in fields such as metallurgy, mining, and offshore engineering. As a lubricant for open gears, open gear lubricating oils have also been widely developed, and open gear lubricating oils and greases with different formulations continuously appear on the market.

[0003] Although the formulations of current open gear lubricants are different, basically molybdenum disulfide, graphite and other black solid lubricants are added to increase the extreme pressure performance of the products; some products improve the adhesion performance and oil film thickness of the products by adding asphalt. However, the working conditions of open gears make the supporting lubricants easy to splash around the equipment, and the black solid additives and asphalt will cause pollution to the environment that is not easy to remove.

[0004] Therefore, how to make the open gear lubricant maintain excellent extreme pressure performance and adhesion performance while avoiding environmental pollution is a key technical problem that needs to be solved urgently by those skilled in the art.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The present invention provides an open gear lubricating oil and a preparation method thereof, which overcome the problem that the existing open gear lubricants may cause environmental pollution due to the inclusion of black solid additives such as molybdenum disulfide and graphite or asphalt in the product combination, and provide an open gear lubricant with a light color and without asphalt.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] The present invention provides a lubricating oil, and its raw materials include the following components in weight percentage:

[0009]

[0010] In the novel open gear lubricating oil provided by the present invention, the components synergistically act with each other, and good adhesion performance can be obtained. The addition of calcium petroleum sulfonate, melamine cyanurate and ultra-fine light calcium carbonate can ensure that the prepared open gear lubricating oil has excellent extreme pressure and anti-wear performance; the addition of polyisobutene can effectively increase the viscosity and adhesion of the lubricating oil; the addition of calcium petroleum sulfonate can provide good protection ability for ferrous metals.

[0011] According to the lubricating oil, the base oil is 150BS mineral oil.

[0012] According to the lubricating oil, the molecular weight of the polyisobutene is 40000 - 60000.

[0013] According to the lubricating oil, the base number of the calcium petroleum sulfonate is 300 - 380.

[0014] According to the lubricating oil, it includes 6 - 14% of light calcium carbonate, preferably 7 - 13% of light calcium carbonate.

[0015] According to the lubricating oil, the particle size of the light calcium carbonate is 0.02 - 0.1 um.

[0016] The present invention provides a method for preparing the lubricating oil, which includes mixing 40 - 65% of the calcium petroleum sulfonate and the base oil, heating the mixture to 80 - 85°C, and then adding other raw materials.

[0017] According to the method for preparing the lubricating oil, it includes the following steps:

[0018] S1. Mix 40 - 65% of the calcium petroleum sulfonate and the base oil, heat the mixture to 80 - 85°C, and stir; preferably, stir for 0.3 - 1 h in S1.

[0019] S2. Keep the temperature constant at 80 - 85°C, and add polyisobutene and the remaining 150BS base oil;

[0020] S3. Continuously add light calcium carbonate and melamine cyanurate, and stir after adding.

[0021] According to the method for preparing the lubricating oil, it further includes the following steps:

[0022] S4. Circulate and stir the mixture obtained in S3 for 0.8 - 1.2 h.

[0023] According to the method for preparing the lubricating oil, in S4, turn on the circulation pump to make the mixture circulate, turn on the stirrer during the circulation, and after circulating and stirring for 1 h, the finished product is obtained.

[0024] Preferably, the method for preparing the lubricating oil provided by the present invention includes the following steps:

[0025] S1. Mix 40 - 65% of the base oil of the calcium petroleum sulfonate, heat the mixture to 80 - 85°C, and stir for 0.5 h;

[0026] S2. Keep the temperature constant at 80 - 85°C, and add polyisobutene and the remaining 150BS base oil;

[0027] S3. Continuously add light calcium carbonate and MCA, and turn on the stirrer after adding;

[0028] S4. Turn on the circulation pump to make the mixture circulate, turn on the stirrer during the circulation. After circulating and stirring for 1 h, the finished product is obtained.

[0029] The present invention also provides the application of the lubricating oil in open gears.

[0030] Advantages of the present invention:

[0031] The open gear lubricating oil of the present invention is prepared from raw materials such as calcium petroleum sulfonate with a base number of 300 - 380, polyisobutylene with a molecular weight of 40,000 - 60,000, ultrafine light calcium carbonate with a particle size of 0.02 - 0.1 μm, and 150BS base oil through a specified process. Among them: calcium petroleum sulfonate, ultrafine light calcium carbonate, and melamine cyanurate provide excellent extreme pressure and anti-wear performance (the sintering load can reach 400 Kg) and a light color for the product of the present invention (currently, black graphite or molybdenum disulfide needs to be added to general open gear oils); selecting 150BS base oil can obtain better lubricity (oil film thickness); polyisobutylene is a high molecular polymer with long fibers and adhesiveness itself, and adding polyisobutylene can effectively increase the adhesiveness of the product (solving the problem that some open gear oil products need to add asphalt to improve the adhesiveness of the product); at the same time, the addition of calcium petroleum sulfonate provides good rust prevention performance for the product. Therefore, the open gear lubricating oil of the present invention can maintain excellent extreme pressure performance and adhesiveness while avoiding causing difficult-to-remove black pollution to the environment. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0033] In the present invention, raw materials such as base oil, polyisobutylene, calcium petroleum sulfonate, nano-scale light calcium carbonate, and melamine cyanurate are mixed. Calcium petroleum sulfonate, nano-scale light calcium carbonate, and melamine cyanurate can increase the extreme pressure and anti-wear performance and adhesiveness of the mixture. Polyisobutylene can effectively increase the adhesiveness. Calcium petroleum sulfonate also provides extremely strong corrosion prevention performance for the composition. Since the composition does not contain substances such as molybdenum disulfide, graphite, and asphalt, it avoids the environmental pollution problem caused by the black color of the current mainstream open gear lubricating oils.

[0034] The present invention provides a lubricating oil, and its raw materials include the following components in weight percentage:

[0035]

[0036] The present invention provides a preparation method of the lubricating oil, including the following steps:

[0037] S1. Mix calcium petroleum sulfonate with 40 - 65% of the base oil, then heat it up to 80 - 85°C and stir for 0.5 h;

[0038] S2. Keep the temperature constant at 80 - 85°C, and add polyisobutene and the remaining 150BS base oil;

[0039] S3. Continuously add light calcium carbonate and MCA, and start stirring after adding;

[0040] S4. Turn on the circulation pump to circulate the mixture, and start stirring during the circulation. After circulating and stirring for 1 h, the finished product is obtained.

[0041] Example 1

[0042] This example provides a lubricating oil, and its raw materials include the following components in weight percentage:

[0043]

[0044] This example provides a preparation method of the lubricating oil, including the following steps:

[0045] S1. Mix calcium petroleum sulfonate with half of the base oil, then heat it up to 80 - 85°C and stir for 0.5 h;

[0046] S2. Keep the temperature constant at 80 - 85°C, and add polyisobutene and the remaining 150BS base oil;

[0047] S3. Continuously add light calcium carbonate and MCA, and start stirring after adding;

[0048] S4. Turn on the circulation pump to circulate the mixture, and start stirring during the circulation. After circulating and stirring for 1 h, the finished product is obtained.

[0049] Example 2

[0050] This example provides a lubricating oil, and its raw materials include the following components in weight percentage:

[0051]

[0052] This example provides a preparation method of the lubricating oil, including the following steps:

[0053] S1. Mix 19% calcium petroleum sulfonate with half of the base oil, then heat it up to 80 - 85°C and stir for 0.5 h;

[0054] S2. Keep the temperature constant at 80 - 85°C, and add 15% polyisobutene and the remaining 150BS base oil;

[0055] S3. Continuously add 10% light calcium carbonate and 3% MCA, and start stirring after adding;

[0056] S4. Start the circulation pump to circulate the mixture and start stirring during the circulation. After circulating and stirring for 1 h, the finished product is obtained.

[0057] Example 3

[0058] This example provides a lubricating oil, and its raw materials include the following components in weight percentage:

[0059]

[0060] This example provides a preparation method of the lubricating oil, including the following steps:

[0061] S1. Mix calcium petroleum sulfonate with half of the base oil and heat up to 80 - 85 °C, and stir for 0.5 h;

[0062] S2. Keep the temperature constant at 80 - 85 °C, and add polyisobutene and the remaining 150BS base oil;

[0063] S3. Continue to add light calcium carbonate and MCA, and start stirring after adding;

[0064] S4. Start the circulation pump to circulate the mixture and start stirring during the circulation. After circulating and stirring for 1 h, the finished product is obtained.

[0065] Comparative Example 1

[0066] Comparative Example 1 is an open - type gear lubricating oil of a certain brand on the market, which is black and viscous.

[0067] The equipment in the above examples is a conventional open - top reaction kettle, and the raw materials used are all purchased from the market.

[0068] The open - type gear lubricating oil in the comparative example is purchased from the market.

[0069] Performance tests are carried out on the open - type gear lubricating oils prepared in each example of the present invention, and the comparison data of the test results with the commercially available open - type gear oil used as a comparative example are shown in Table 1 below.

[0070] Table 1 Performance test data of examples and comparative examples

[0071]

[0072] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing examples, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each example of the present invention.

Claims

1. A lubricating oil, characterized in that, Its raw materials include components with the following weight percentages:

2. The lubricating oil according to claim 1, characterized in that, The base oil is 150BS mineral oil.

3. The lubricating oil according to claim 1 or 2, characterized in that, The molecular weight of the polyisobutene is 40,000 - 60,000.

4. The lubricating oil according to any one of claims 1-3, characterized in that The base number of the calcium petroleum sulfonate is 300 - 380.

5. The lubricating oil according to any one of claims 1-4, characterized in that, The particle size of the light calcium carbonate is 0.02 - 0.1 μm.

6. A method for preparing the lubricating oil according to any one of claims 1-5, characterized in that, It includes mixing 40 - 65% of the calcium petroleum sulfonate and the base oil, heating it to 80 - 85°C, and then adding other raw materials.

7. The preparation method of the lubricating oil according to claim 6, characterized in that, It includes the following steps: S1. Mix 40 - 65% of the calcium petroleum sulfonate and the base oil, heat it to 80 - 85°C, and stir. S2. Keep the temperature constant at 80 - 85°C, and add polyisobutene and the remaining 150BS base oil. S3. Continuously add light calcium carbonate and melamine cyanurate, and stir after adding. Preferably, stir for 0.3 - 1 h in S1.

8. The preparation method of the lubricating oil according to claim 6 or 7, characterized in that, It also includes the following steps: S4. Circulate and stir the mixture obtained in S3 for 0.8 - 1.2 h.

9. The preparation method of the lubricating oil according to claim 8, wherein In S4, turn on the circulation pump to circulate the mixture, turn on the stirrer during the circulation, and after circulating and stirring for 1 h, the finished product is obtained.

10. Application of the lubricating oil according to any one of claims 1 - 5 in an open gear.

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