Anti-wear hydraulic oil and preparation method thereof

Abstract

The invention discloses anti-wear hydraulic oil and a preparation method thereof. The anti-wear hydraulic oil comprises the following components in parts by weight: 90-99 parts of base oil; 0.3-2 parts of a zinc-containing anti-wear agent; 0.3-2 parts of an ash-free anti-wear agent; 0.3-2 parts of a nano anti-wear agent; 0.2-1 part of an antioxidant; 0.05 to 0.5% of a detergent; and 0.05 to 0.2 part of an antirust agent. According to the anti-wear hydraulic oil adopting the structure and the preparation method of the anti-wear hydraulic oil, the defect that existing long-oil-change-period anti-wear hydraulic oil is insufficient in wear resistance when approaching the oil change period is overcome, and the anti-wear hydraulic oil further has the function of repairing wear of hydraulic elements, so that the service life of a hydraulic system is prolonged.

Description

Technical Field

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

[0002] With the continuous development of hydraulic transmission technology and its significant advantages, hydraulic oil is now used more and more widely, including aviation, automobiles, ships, construction, petroleum and various engineering machinery, etc. As an important component of the hydraulic system, hydraulic oil plays a very important role in hydraulic transmission and ultimately affects its working efficiency.

[0003] With the development of hydraulic technology, the performance requirements for hydraulic oil are getting higher and higher. The level of additives is a symbol of today's lubrication technology. Various additives have different molecular structures and different action mechanisms. Their performance in different additive formulation systems is not the same. Therefore, additives affect the performance of hydraulic oil to a certain extent. The existing long oil change cycle anti-wear hydraulic oil has the disadvantage of insufficient anti-wear performance when approaching the oil change cycle. Summary of the invention

[0004] The purpose of the present invention is to provide an anti-wear hydraulic oil and a preparation method thereof, so as to solve the disadvantage that the existing long oil change cycle anti-wear hydraulic oil has insufficient anti-wear performance when the oil change cycle is close, and also has the function of repairing the wear of hydraulic components, thereby prolonging the service life of the hydraulic system.

[0005] To achieve the above object, the present invention provides an anti-wear hydraulic oil, comprising, by weight:

[0006] Base oil 90-99;

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

[0008] Ashless antiwear 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 butyl octyl zinc thiophosphate, dioctyl alkaline zinc thiophosphate, primary and secondary alkyl zinc thiophosphate, and mixed primary and secondary alcohol alkyl zinc salt.

[0012] Preferably, the ashless antiwear agent is at least one of tricresyl phosphate and triphenyl thiophosphate.

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

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

[0015] Preferably, the detergent is at least one of a high-based sulfurized alkyl phenol salt and a high-based 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 Class III hydrogenated base oil, Class II hydrogenated base oil and Class IV base oil.

[0018] Preferably, the nano anti-wear agent is mixed in the following weight ratio: dialkylbenzene: boronated polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nanographene: 2-10: 1-7: 0-5: 1-7.

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

[0020] (1) preparing a concentrated hydrochloric acid solution with a mass fraction of aluminum phosphate of 36% to 42%, and placing the prepared concentrated hydrochloric acid solution of aluminum phosphate in a transparent container equipped with a stirrer;

[0021] (2) irradiating a concentrated hydrochloric acid solution having a mass fraction of aluminum phosphate of 36% to 42% with a laser having a power of 500 to 2000 W, while turning on a stirrer;

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

[0023] (4) mixing aluminum phosphate spherical nanoparticles with dialkylbenzene, boronated polyisobutylene succinimide, and nanographene in a weight ratio of dialkylbenzene: boronated polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nanographene in a ratio of 2-10: 1-7: 0-5: 1-7 to prepare a nano anti-wear agent;

[0024] (5) The base oil is heated to 50°C-60°C, and the antioxidant, nano anti-wear agent, zinc anti-wear agent, ash-free anti-wear agent, detergent, and rust inhibitor are added in the order of mixing to obtain an anti-wear hydraulic oil with a long oil change cycle.

[0025] The beneficial effects of the present invention are as follows: the anti-wear hydraulic oil prepared by the present invention has excellent alkalinity retention capability, anti-wear performance that is not easy to decay, excellent metal repair function and longer oil change cycle.

[0026] The technical solution of the present invention is further described in detail below through embodiments. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with examples. All chemicals and reagents used in the examples are commercially available unless otherwise specified.

[0028] Example 1

[0029] First, a concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate is prepared, and the prepared concentrated hydrochloric acid solution of aluminum phosphate is placed in a transparent container equipped with a stirrer; a laser with a power of 500-2000W is used to irradiate the concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate, and the stirrer is turned on at the same time; when the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W, and the obtained precipitate is spherical nanoparticles of aluminum phosphate, and the obtained nanoparticles are purified by alkali washing to obtain spherical nanoparticles of aluminum phosphate; the spherical nanoparticles of aluminum phosphate are mixed with dialkylbenzene, boronated polyisobutylene succinimide, and nanographene in a weight ratio of dialkylbenzene: boronated polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nanographene in a 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 parts and order: 0.3 antioxidant, 0.3 nano antiwear agent, 0.2 zinc antiwear agent, 0.3 ash-free antiwear agent, 0.1 detergent, 0.05 rust inhibitor, and the remainder is the base oil. Mix them evenly to obtain an anti-wear hydraulic oil with a long oil change cycle.

[0031] Example 2

[0032] First, a concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate is prepared, and the prepared concentrated hydrochloric acid solution of aluminum phosphate is placed in a transparent container equipped with a stirrer; a laser with a power of 500-2000W is used to irradiate the concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate, and the stirrer is turned on at the same time; when the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W, and the obtained precipitate is spherical nanoparticles of aluminum phosphate, and the obtained nanoparticles are purified by alkali washing to obtain spherical nanoparticles of aluminum phosphate; the spherical nanoparticles of aluminum phosphate are mixed with dialkylbenzene, boronated polyisobutylene succinimide, and nanographene in a weight ratio of dialkylbenzene: boronated polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nanographene in a 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: 0.3 part antioxidant, 1.0 part nano anti-wear agent, 0.2 part zinc anti-wear agent, 0.3 part ash-free anti-wear agent, 0.1 part detergent, 0.05 part rust inhibitor, and the remainder being the base oil. Mix them evenly to obtain an anti-wear hydraulic oil with a long oil change cycle.

[0034] Example 3

[0035] First, a concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate is prepared, and the prepared concentrated hydrochloric acid solution of aluminum phosphate is placed in a transparent container equipped with a stirrer; a laser with a power of 500-2000W is used to irradiate the concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate, and the stirrer is turned on at the same time; when the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W, and the obtained precipitate is spherical nanoparticles of aluminum phosphate, and the obtained nanoparticles are purified by alkali washing to obtain spherical nanoparticles of aluminum phosphate; the spherical nanoparticles of aluminum phosphate are mixed with dialkylbenzene, boronated polyisobutylene succinimide, and nanographene in a weight ratio of dialkylbenzene: boronated polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nanographene in a 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 parts and order: 0.3 antioxidant, 1.5 nano anti-wear agent, 0.2 zinc anti-wear agent, 0.3 ash-free anti-wear agent, 0.1 detergent, 0.05 rust inhibitor, and the remainder is the base oil. Mix them evenly to obtain an anti-wear hydraulic oil with a long oil change cycle.

[0037] Example 4

[0038] First, a concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate is prepared, and the prepared concentrated hydrochloric acid solution of aluminum phosphate is placed in a transparent container equipped with a stirrer; a laser with a power of 500-2000W is used to irradiate the concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate, and the stirrer is turned on at the same time; when the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W, and the obtained precipitate is spherical nanoparticles of aluminum phosphate, and the obtained nanoparticles are purified by alkali washing to obtain spherical nanoparticles of aluminum phosphate; the spherical nanoparticles of aluminum phosphate are mixed with dialkylbenzene, boronated polyisobutylene succinimide, and nanographene in a weight ratio of dialkylbenzene: boronated polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nanographene in a 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 parts and order: 0.3 antioxidant, 2.0 nano anti-wear agent, 0.2 zinc anti-wear agent, 0.3 ash-free anti-wear agent, 0.1 detergent, 0.05 rust inhibitor, and the remainder is the base oil. Mix them evenly to obtain an anti-wear hydraulic oil with a long oil change cycle.

[0040] Example 5

[0041] First, a concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate is prepared, and the prepared concentrated hydrochloric acid solution of aluminum phosphate is placed in a transparent container equipped with a stirrer; a laser with a power of 500-2000W is used to irradiate the concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate, and the stirrer is turned on at the same time; when the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W, and the obtained precipitate is spherical nanoparticles of aluminum phosphate, and the obtained nanoparticles are purified by alkali washing to obtain spherical nanoparticles of aluminum phosphate; the spherical nanoparticles of aluminum phosphate are mixed with dialkylbenzene, boronated polyisobutylene succinimide, and nanographene in a weight ratio of dialkylbenzene: boronated polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nanographene in a 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 parts and order: 0.3 antioxidant, 0.2 zinc antiwear agent, 0.3 ash-free antiwear agent, 0.1 detergent, 0.05 rust inhibitor, and the remainder is base oil. Mix them evenly to obtain an anti-wear hydraulic oil with a long oil change cycle.

[0043] Example 6

[0044] First, a concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate is prepared, and the prepared concentrated hydrochloric acid solution of aluminum phosphate is placed in a transparent container equipped with a stirrer; a laser with a power of 500-2000W is used to irradiate the concentrated hydrochloric acid solution with a mass fraction of 40% of aluminum phosphate, and the stirrer is turned on at the same time; when the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500W, and the obtained precipitate is spherical nanoparticles of aluminum phosphate, and the obtained nanoparticles are purified by alkali washing to obtain spherical nanoparticles of aluminum phosphate; the spherical nanoparticles of aluminum phosphate are mixed with dialkylbenzene, boronated polyisobutylene succinimide, and nanographene in a weight ratio of dialkylbenzene: boronated polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nanographene in a 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 parts and order: 0.5 antioxidant, 1.5 nano anti-wear agent, 0.1 zinc anti-wear agent, 0.4 ash-free anti-wear agent, 0.1 detergent, 0.05 rust inhibitor, and the remainder is the base oil. Mix them evenly to obtain an anti-wear hydraulic oil with a long oil change cycle.

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

[0047] Anti-wear performance: Using Xiamen four-ball testing machine, the PB value is 139 kg, long wear is carried out under the conditions of 40 kg / 60 minutes / 1200 rpm / 75 degrees Celsius, and the wear spot diameter is shown in Table 1;

[0048] Rust resistance: No rust after 72 hours of testing at 60 degrees Celsius using synthetic seawater.

[0049] Corrosion resistance: 121 degrees Celsius, 12 hours, copper corrosion level see Table 1.

[0050] Oil change cycle: After 8000 hours of operation, the LG855 heavy-duty loader conducted an oil sample analysis and all indicators were within the normal range.

[0051] Table 1

[0052]

[0053]

[0054] The present invention provides an anti-wear hydraulic oil and a preparation method thereof. The spherical nanoparticles have excellent hydrolysis stability and thermal stability, not only have outstanding anti-wear performance, but also can greatly reduce the friction coefficient. Adding spherical nanoparticle anti-wear agent to the hydraulic oil can reduce the wear between machines, 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 solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. An anti-wear hydraulic oil, characterized in that: In parts by weight:

2. The anti-wear hydraulic oil according to claim 1, characterized in that: The zinc-containing anti-wear agent is at least one of butyl octyl zinc thiophosphate, dioctyl alkaline zinc thiophosphate, primary and secondary alkyl zinc thiophosphate, and mixed primary and secondary alcohol alkyl zinc salt.

3. The anti-wear hydraulic oil according to claim 1, characterized in that: The ashless anti-wear agent is at least one of tricresyl phosphate and triphenyl thiophosphate.

4. The anti-wear hydraulic oil according to claim 1, characterized in that: The nano anti-wear agent is a mixture of dialkylbenzene, boronated polyisobutylene succinimide, aluminum phosphate spherical nano particles and nano graphene.

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

6. The anti-wear hydraulic oil according to claim 1, characterized in that: The detergent is at least one of high base sulfurized alkyl phenol salt and high base alkyl salicylate.

7. 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.

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

9. The anti-wear hydraulic oil according to claim 4, characterized in that: The nano anti-wear agent is mixed in the following weight ratio: dialkylbenzene: boronated polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nano graphene: 2-10: 1-7: 0-5: 1-7.

10. A method for preparing an anti-wear hydraulic oil according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) preparing a concentrated hydrochloric acid solution with a mass fraction of aluminum phosphate of 36% to 42%, and placing the prepared concentrated hydrochloric acid solution of aluminum phosphate in a transparent container equipped with a stirrer; (2) irradiating a concentrated hydrochloric acid solution having a mass fraction of aluminum phosphate of 36% to 42% with a laser having a power of 500 to 2000 W, while turning on a stirrer; (3) When the solution becomes slightly turbid, the laser pulse irradiation is changed to a power of 1000-1500 W, and the resulting precipitate is spherical nanoparticles of aluminum phosphate. The nanoparticles obtained are purified by alkali washing to obtain spherical nanoparticles of aluminum phosphate; (4) mixing aluminum phosphate spherical nanoparticles with dialkylbenzene, boronated polyisobutylene succinimide, and nanographene in a weight ratio of dialkylbenzene: boronated polyisobutylene succinimide: aluminum phosphate spherical nanoparticles: nanographene in a ratio of 2-10: 1-7: 0-5: 1-7 to prepare a nano anti-wear agent; (5) The base oil is heated to 50°C-60°C, and the antioxidant, nano anti-wear agent, zinc anti-wear agent, ash-free anti-wear agent, detergent, and rust inhibitor are added in the order of mixing to obtain an anti-wear hydraulic oil with a long oil change cycle.

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