An anti-wear hydraulic fluid and method of making same

Abstract

The application discloses an anti-wear hydraulic oil and a preparation method thereof, and the anti-wear hydraulic oil comprises the following components in parts by weight: base oil 90-99, zinc-containing anti-wear agent 0.3-2, ashless anti-wear agent 0.3-2, nano anti-wear agent 0.3-2, antioxidant 0.2-1, cleaning agent 0.05-0.5 and rust inhibitor 0.05-0.2. The anti-wear hydraulic oil and the preparation method thereof have the advantages that the anti-wear hydraulic oil with a long oil change cycle has the function of repairing the wear of hydraulic components and improving the service life of the hydraulic system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic oil, in particular to an anti-wear hydraulic oil and a preparation method thereof. BACKGROUND

[0002] With the continuous development of hydraulic transmission technology and its significant advantages, the application of hydraulic oil is becoming more and more widespread, including aviation, automobiles, ships, construction, oil and various engineering machinery and so on. As an important part of the hydraulic system, the hydraulic oil plays a very important role in the hydraulic transmission and ultimately affects its work efficiency.

[0003] With the development of hydraulic technology, the performance requirements of hydraulic oil are getting higher and higher. The level of additive is the symbol of current lubrication technology, and various additive molecules have different structures and mechanisms, and their performances are different in different additive formula systems, so to some extent, additives affect the performance of hydraulic oil, and the existing long oil change cycle anti-wear hydraulic oil has the disadvantage of insufficient wear resistance when approaching the oil change cycle. SUMMARY

[0004] The purpose of the present application is to provide an anti-wear hydraulic oil and a preparation method thereof, which solves the problem of insufficient wear resistance of the existing long oil change cycle anti-wear hydraulic oil when approaching the oil change cycle, and also has the function of repairing the wear of hydraulic components, thereby improving the service life of the hydraulic system.

[0005] To achieve the above purpose, the present application provides an anti-wear hydraulic oil, which comprises, by weight ratio:

[0006] Base oil 90-99;

[0007] Zinc-containing anti-wear agent 0.3-2;

[0008] Ashless anti-wear agent 0.3-2;

[0009] Nano anti-wear agent 0.3-2;

[0010]

[0011] Preferably, the zinc-containing anti-wear agent is at least one of sulfur phosphorus zinc butyl octyl salt, sulfur phosphorus basic zinc dioctyl salt, sulfur phosphorus primary secondary alkyl zinc salt, and mixed primary secondary alcohol alkyl zinc salt.

[0012] Preferably, the ashless anti-wear agent is at least one of tri-methyl benzene phosphate and triphenyl phosphorothioate.

[0013] Preferably, the nano-anti-wear agent is a mixture of dialkylbenzene, boronized polyisobutylene succinimide, aluminum phosphate spherical nanoparticles, and nano-graphene. The spherical nanoparticles have excellent hydrolytic stability and thermal stability, which not only have outstanding anti-wear performance, but also greatly reduce the coefficient of friction.

[0014] Preferably, the antioxidant is at least one of amine antioxidants and phenolic antioxidants.

[0015] Preferably, the detergent is at least one of high-alkalinity alkylphenol salts and high-alkalinity alkyl salicylate.

[0016] Preferably, the rust inhibitor is at least one of benzotriazole fatty acid ammonium salt and thiadiazole.

[0017] Preferably, the base oil is at least one of Group III hydrotreated base oil, Group II hydrotreated base oil, and Group IV base oil.

[0018] Preferably, the nano-abrasion agent is mixed in the following weight ratio: dialkylbenzene: boronized polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nano-graphene in the ratio of 2-10: 1-7: 0-5: 1-7.

[0019] A method for preparing an anti-wear hydraulic oil includes the following steps:

[0020] (1) Prepare a concentrated hydrochloric acid solution with a mass fraction of 36%-42% for aluminum phosphate. Place the prepared concentrated hydrochloric acid solution for aluminum phosphate in a transparent container equipped with a stirrer.

[0021] (2) Irradiate a concentrated hydrochloric acid solution with a mass fraction of 36%-42% aluminum phosphate with a laser with a power of 500-2000W, while turning on the stirrer at the same time;

[0022] (3) When the solution becomes slightly turbid, the laser pulse irradiation with a power of 1000-1500W is changed. The resulting precipitate is the spherical nanoparticles of aluminum phosphate. The nanoparticles obtained above are purified by alkaline washing to obtain spherical nanoparticles of aluminum phosphate.

[0023] (4) Aluminum phosphate spherical nanoparticles are mixed with dialkylbenzene, boronized polyisobutylene succinimide, and nanographene in a weight ratio of 2-10:1-7:0-5:1-7 to prepare a nano anti-wear agent.

[0024] (5) Heat the base oil to 50℃-60℃, and add it in the following order: antioxidant, nano anti-wear agent, zinc-containing anti-wear agent, ashless anti-wear agent, detergent, and rust inhibitor. Mix them evenly to obtain a long oil change cycle anti-wear hydraulic oil.

[0025] The beneficial effects of the present invention are: the anti-wear hydraulic fluid prepared by the present invention has excellent alkalinity retention ability; anti-wear performance that is not easily degraded; excellent metal repair function and longer oil change cycle.

[0026] The technical solution of the present invention will be further described in detail below through embodiments. Detailed Implementation

[0027] The present invention will be further described below with reference to the embodiments. Unless otherwise specified, all chemicals and reagents used in the embodiments are commercially available.

[0028] Example 1

[0029] First, a concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is prepared and placed in a transparent container equipped with a stirrer. The concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is irradiated with a laser with a power of 500-2000W while the stirrer is turned on. When the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W. The resulting precipitate is the spherical nanoparticles of aluminum phosphate. The obtained nanoparticles are purified by alkaline washing to obtain spherical aluminum phosphate nanoparticles. The spherical aluminum phosphate nanoparticles are mixed with dialkylbenzene, boronized polyisobutylene succinimide, and nanographene in a weight ratio of 5:3:2:3 to obtain a nano-anti-wear agent.

[0030] Then heat the base oil to 55°C and add the following ingredients in the following weight proportions and order: antioxidant 0.3, nano anti-wear agent 0.3, zinc-containing anti-wear agent 0.2, ashless anti-wear agent 0.3, detergent 0.1, rust inhibitor 0.05, with the remainder being base oil. Mix them thoroughly to obtain a long oil change cycle anti-wear hydraulic oil.

[0031] Example 2

[0032] First, a concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is prepared and placed in a transparent container equipped with a stirrer. The concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is irradiated with a laser with a power of 500-2000W while the stirrer is turned on. When the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W. The resulting precipitate is the spherical nanoparticles of aluminum phosphate. The obtained nanoparticles are purified by alkaline washing to obtain spherical aluminum phosphate nanoparticles. The spherical aluminum phosphate nanoparticles are mixed with dialkylbenzene, boronized polyisobutylene succinimide, and nanographene in a weight ratio of 5:3:2:3 to obtain a nano-anti-wear agent.

[0033] Then heat the base oil to 55°C and add the following ingredients in the following weight proportions and order: antioxidant 0.3, nano anti-wear agent 1.0, zinc-containing anti-wear agent 0.2, ashless anti-wear agent 0.3, detergent 0.1, rust inhibitor 0.05, with the remainder being base oil. Mix them thoroughly to obtain a long oil change cycle anti-wear hydraulic oil.

[0034] Example 3

[0035] First, a concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is prepared and placed in a transparent container equipped with a stirrer. The concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is irradiated with a laser with a power of 500-2000W while the stirrer is turned on. When the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W. The resulting precipitate is the spherical nanoparticles of aluminum phosphate. The obtained nanoparticles are purified by alkaline washing to obtain spherical aluminum phosphate nanoparticles. The spherical aluminum phosphate nanoparticles are mixed with dialkylbenzene, boronized polyisobutylene succinimide, and nanographene in a weight ratio of 5:3:2:3 to obtain a nano-anti-wear agent.

[0036] Then heat the base oil to 55°C and add the following ingredients in the following weight proportions and order: antioxidant 0.3, nano anti-wear agent 1.5, zinc-containing anti-wear agent 0.2, ashless anti-wear agent 0.3, detergent 0.1, rust inhibitor 0.05, with the remainder being base oil. Mix them thoroughly to obtain a long oil change cycle anti-wear hydraulic oil.

[0037] Example 4

[0038] First, a concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is prepared and placed in a transparent container equipped with a stirrer. The concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is irradiated with a laser with a power of 500-2000W while the stirrer is turned on. When the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W. The resulting precipitate is the spherical nanoparticles of aluminum phosphate. The obtained nanoparticles are purified by alkaline washing to obtain spherical aluminum phosphate nanoparticles. The spherical aluminum phosphate nanoparticles are mixed with dialkylbenzene, boronized polyisobutylene succinimide, and nanographene in a weight ratio of 5:3:2:3 to obtain a nano-anti-wear agent.

[0039] Then heat the base oil to 55°C and add the following ingredients in the following weight proportions and order: antioxidant 0.3, nano anti-wear agent 2.0, zinc-containing anti-wear agent 0.2, ashless anti-wear agent 0.3, detergent 0.1, rust inhibitor 0.05, with the remainder being base oil. Mix them thoroughly to obtain a long oil change cycle anti-wear hydraulic oil.

[0040] Example 5

[0041] First, a concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is prepared and placed in a transparent container equipped with a stirrer. The concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is irradiated with a laser with a power of 500-2000W while the stirrer is turned on. When the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W. The resulting precipitate is the spherical nanoparticles of aluminum phosphate. The obtained nanoparticles are purified by alkaline washing to obtain spherical aluminum phosphate nanoparticles. The spherical aluminum phosphate nanoparticles are mixed with dialkylbenzene, boronized polyisobutylene succinimide, and nanographene in a weight ratio of 5:3:2:3 to obtain a nano-anti-wear agent.

[0042] Then heat the base oil to 55°C and add the following ingredients in the following weight proportions and order: antioxidant 0.3, zinc-containing anti-wear agent 0.2, ashless anti-wear agent 0.3, detergent 0.1, rust inhibitor 0.05, with the remainder being base oil. Mix them thoroughly to obtain a long oil change cycle anti-wear hydraulic oil.

[0043] Example 6

[0044] First, a concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is prepared and placed in a transparent container equipped with a stirrer. The concentrated hydrochloric acid solution with a mass fraction of 40% aluminum phosphate is irradiated with a laser with a power of 500-2000W while the stirrer is turned on. When the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W. The resulting precipitate is the spherical nanoparticles of aluminum phosphate. The obtained nanoparticles are purified by alkaline washing to obtain spherical aluminum phosphate nanoparticles. The spherical aluminum phosphate nanoparticles are mixed with dialkylbenzene, boronized polyisobutylene succinimide, and nanographene in a weight ratio of 5:3:2:3 to obtain a nano-anti-wear agent.

[0045] Then heat the base oil to 55°C and add the following ingredients in the following weight proportions and order: antioxidant 0.5, nano anti-wear agent 1.5, zinc-containing anti-wear agent 0.1, ashless anti-wear agent 0.4, detergent 0.1, rust inhibitor 0.05, with the remainder being base oil. Mix them thoroughly to obtain a long oil change cycle anti-wear hydraulic oil.

[0046] The anti-wear hydraulic oils prepared in Examples 1-6 were tested for their anti-wear performance, rust prevention performance, corrosion resistance performance, and oil change cycle.

[0047] Wear resistance: The wear test was conducted using a four-ball tester in Xiamen. The PB value was 139 kg. The long-term wear test was performed under the conditions of 40 kg / 60 minutes / 1200 rpm / 75 degrees Celsius. The wear scar diameter is shown in Table 1.

[0048] Rust resistance: No rust was observed after testing with synthetic seawater at 60 degrees Celsius for 72 hours;

[0049] Corrosion resistance: 121 degrees Celsius, 12 hours, the corrosion level of copper sheet is shown in Table 1.

[0050] Oil change interval: After 8000 hours of operation, the oil sample analysis of the LG855 heavy loader showed that all indicators were within the normal range.

[0051] Table 1

[0052]

[0053]

[0054] This invention provides an anti-wear hydraulic oil and its preparation method. The spherical nanoparticles have excellent hydrolytic stability and thermal stability. They not only have outstanding anti-wear performance, but also greatly reduce the coefficient of friction. Adding spherical nanoparticle anti-wear agents to hydraulic oil can reduce wear between machinery, perfectly protect the hydraulic system and extend the service life of the hydraulic system.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. An anti-wear hydraulic oil, characterized in that, By weight, it includes: The zinc-containing anti-wear agent is at least one of the following: thiophosphoric butoctyl zinc salt, thiophosphoric dioctyl basic zinc salt, thiophosphoric primary and secondary alkyl zinc salt, and mixed primary and secondary alcohol alkyl zinc salt; The ashless anti-wear agent is at least one of tricresyl phosphate and triphenyl thiophosphate; The nano-anti-wear agent is a mixture of dialkylbenzene, boronized polyisobutylene succinimide, aluminum phosphate spherical nanoparticles, and nano-graphene; the nano-anti-wear agent is mixed in the following weight ratio: dialkylbenzene: boronized polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nano-graphene is 2-10: 1-7: 0-5: 1-7.

2. The anti-wear hydraulic oil according to claim 1, characterized in that: The antioxidant is at least one of amine antioxidants and phenolic antioxidants.

3. The anti-wear hydraulic oil according to claim 1, characterized in that: The detergent is at least one of high-alkalinity alkylphenol salts and high-alkalinity alkyl salicylate.

4. The anti-wear hydraulic oil according to claim 1, characterized in that: The rust inhibitor is at least one of benzotriazole fatty acid ammonium salt and thiadiazole.

5. The anti-wear hydraulic oil according to claim 1, characterized in that: The base oil is at least one of Group III hydrotreated base oil, Group II hydrotreated base oil, and Group IV base oil.

6. A method for preparing an anti-wear hydraulic oil as described in any one of claims 1-5, characterized in that, Includes the following steps: (1) Prepare a concentrated hydrochloric acid solution with a mass fraction of 36%-42% for aluminum phosphate. Place the prepared concentrated hydrochloric acid solution for aluminum phosphate in a transparent container equipped with a stirrer. (2) Irradiate a concentrated hydrochloric acid solution with a mass fraction of 36%-42% aluminum phosphate with a laser with a power of 500-2000W, while turning on the stirrer at the same time; (3) When the solution becomes slightly turbid, the laser pulse irradiation with a power of 1000-1500W is changed. The resulting precipitate is the spherical nanoparticles of aluminum phosphate. The nanoparticles obtained above are purified by alkaline washing to obtain spherical nanoparticles of aluminum phosphate. (4) Aluminum phosphate spherical nanoparticles are mixed with dialkylbenzene, boronized polyisobutylene succinimide, and nanographene in a weight ratio of 2-10:1-7:0-5:1-7 to prepare a nano anti-wear agent. (5) Heat the base oil to 50℃-60℃, and add it in the following order: antioxidant, nano anti-wear agent, zinc-containing anti-wear agent, ashless anti-wear agent, detergent, and rust inhibitor. Mix them evenly to obtain a long oil change cycle anti-wear hydraulic oil.

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