Industrial robot reducer lubricating oil and preparation method and application thereof

Abstract

The present invention provides an industrial robot reducer lubricating oil and a preparation method and application thereof, belonging to the technical field of industrial robot reducer lubrication. The industrial robot reducer lubricating oil in the present invention includes a base material and an antifoaming agent, the mass of the antifoaming agent is 0.001-0.02% of the mass of the base material; the base material includes: 87.0-96.0% of water-soluble polyalkylene glycol, 3.0-10.0% of oil-soluble polyether, 0.5-1.5% of antioxidant, 0.05-0.1% of metal passivator, 0.3-1.0% of extreme pressure antiwear agent, 0.1-0.3% of friction reducer, 0.05-0.1% of rust inhibitor; the antioxidant is a hindered phenol-substituted imidazole ditrifluoromethylsulfonate ionic liquid, N-phenyl-alkylnaphthalene-1-amine and alkylphenol. The industrial robot reducer lubricating oil provided by the present invention has excellent comprehensive performance.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial robot reducer lubrication, and in particular to an industrial robot reducer lubricating oil, a preparation method and application thereof. Background Art

[0002] With the increase in labor costs and the decrease in labor supply, the manufacturing industry has been motivated to replace human labor with robots, which has driven the rapid growth of demand for industrial robots in my country. Industrial robots are mainly composed of four major components: the body, the reducer, the servo system and the controller. Among them, the lubrication component - the reducer, also known as the "robot's joint", is one of its core components. It controls the power output and operation accuracy of the industrial robot, and its performance directly affects the performance of the industrial robot.

[0003] Robot lubricants mainly play the role of lubrication, cooling, friction reduction and wear reduction in their reducers. Since industrial robots have compact joints, poor heat dissipation, and need to work continuously for a long time, lubricants are required to have good high temperature stability and oxidation stability. The machining precision of industrial robot joint reducers is very high, and the gap between the friction surfaces is very small. During high-load operation, they are often in a boundary lubrication state, requiring lubricants to have good extreme pressure performance. At the same time, the operation characteristics of the robot joints are frequent starting and reciprocating motion within a small range, which can easily cause micro-motion wear, so lubricants are required to have excellent anti-micro-motion wear performance.

[0004] At present, domestic and foreign researchers have reported on related research on industrial robot lubricants, but there are still some shortcomings. For example, patent CN201710706960.3 discloses a lubricant for industrial robot reducers, which contains polyalkylene glycol, seal adaptability improver, extreme pressure anti-wear additive, metal deactivator, rust inhibitor, antioxidant additive and defoamer. The lubricant has excellent viscosity-temperature performance and low temperature performance, as well as excellent oxidation stability and good extreme pressure anti-wear performance, which can meet the lubrication requirements of multi-axis industrial robot multi-stage reducers. Due to the strong polarity of polyalkylene glycol, it is easy to cause damage to the sealing material and cause lubrication failure; in addition, the lubricant has relatively poor oxidation resistance, which will affect its service life and it is difficult to meet the actual long oil change period requirements. Patent CN201811256556.1 discloses a lubricant for an industrial robot precision reducer, including polyalkylene glycol synthetic oil, friction modifier, extreme pressure anti-wear agent, high temperature antioxidant, metal passivator, rust inhibitor and anti-foaming agent. The lubricant has excellent lubricity and low traction, and can meet the ultra-long cycle lubrication requirements of the robot multi-axis reducer, but the amount of lubricant additives added is relatively large, which increases the oil cost. Patent CN202010608554.5 discloses a graphene lubricant for robots, including polyalkylene glycol synthetic oil, nano zinc oxide, nano silicon dioxide, graphene, stearic acid, oleic acid, polyvinyl pyrrolidone, composite dispersant, composite antioxidant, corrosion inhibitor, preservative, antifoaming agent. The lubricant can be used in robots to save oil, resist wear, reduce noise and other functions, improve the efficiency of the reducer, and the raw materials used in the preparation do not contain sulfur, phosphorus and other environmentally harmful elements, are non-toxic, non-corrosive and environmentally friendly; however, a large amount of nano inorganic solid additive raw materials such as nano zinc oxide, nano silicon dioxide and graphene are added to the lubricant, so the product stability is greatly affected. In the experiment, only 3 months (about 2200h) of storage stability was tested, and the actual oil change period of the industrial robot reducer must be at least 10,000h. Therefore, once the nano inorganic solid additives agglomerate during use, they will not only fail to play a role but will have a negative impact. Summary of the invention

[0005] The object of the present invention is to provide an industrial robot reducer lubricating oil and a preparation method and application thereof. The industrial robot reducer lubricating oil provided by the present invention has excellent antioxidant performance, long service life, excellent friction reduction, does not contain nano inorganic solid additives, and has the characteristics of small amount of each additive.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The present invention provides an industrial robot reducer lubricating oil, comprising a base material and an anti-foaming agent, wherein the mass of the anti-foaming agent is 0.001 to 0.02% of the mass of the base material;

[0008] The matrix material includes the following components in percentage by mass:

[0009] Water-soluble polyalkylene glycol 87.0-96.0%, oil-soluble polyether 3.0-10.0%, antioxidant 0.5-1.5%, metal passivator 0.05-0.1%, extreme pressure anti-wear agent 0.3-1.0%, friction reducer 0.1-0.3%, rust inhibitor 0.05-0.1%;

[0010] The antioxidant is a hindered phenol-substituted imidazole ditrifluoromethanesulfonate ionic liquid, N-phenyl-alkylnaphthalene-1-amine and alkylphenol.

[0011] Preferably, the hindered phenol-substituted imidazole ditrifluoromethylsulfonate ionic liquid is 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butyl imidazole ditrifluoromethylsulfonate; the N-phenyl-alkylnaphthalene-1-amine is N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine; and the alkylphenol is 2,6-di-tert-butyl-p-cresol.

[0012] Preferably, the mass of the hindered phenol-substituted imidazole ditrifluoromethanesulfonate ionic liquid is 0.1-0.5% of the total mass of the industrial robot reducer lubricating oil; the mass ratio of the N-phenyl-alkylnaphthalene-1-amine to the alkylphenol is 1-3:1.

[0013] Preferably, the water-soluble polyalkylene glycol comprises synthetic oil SDM-03C and synthetic oil SDM-08D; the kinematic viscosity of the water-soluble polyalkylene glycol at 40°C is 40 to 2200 mm 2 / s.

[0014] Preferably, the kinematic viscosity of the oil-soluble polyether at 40°C is 15 to 250 mm 2 / s; the raw materials for preparing the oil-soluble polyether include monomers and initiators, the monomers include butylene oxide and propylene oxide, and the initiator is an alcohol compound.

[0015] Preferably, the extreme pressure anti-wear agent is dialkyl dithiocarbamate, dioctyl phosphate dodecylamine salt and tri-n-butyl thiophosphate, and the mass ratio of the dialkyl dithiocarbamate, dioctyl phosphate dodecylamine salt and tri-n-butyl thiophosphate is 0.1-0.5:0.1-0.2:0.1-0.3.

[0016] Preferably, the friction reducer is ethylene glycol oleate.

[0017] Preferably, the metal passivator is a benzotriazole derivative; the rust inhibitor is heptadecenyl imidazoline alkenyl succinate; and the antifoaming agent is a silicon-based antifoaming agent and a non-silicon-based antifoaming agent.

[0018] The present invention provides a method for preparing the lubricating oil for the industrial robot reducer described in the above technical solution, comprising the following steps:

[0019] The lubricating oil for the industrial robot reducer is obtained by mixing water-soluble polyalkylene glycol, oil-soluble polyether, antioxidant, metal passivator, extreme pressure anti-wear agent, friction reducer, rust inhibitor and anti-foaming agent.

[0020] The present invention provides the use of the industrial robot reducer lubricating oil described in the above technical solution or the industrial robot reducer lubricating oil prepared by the preparation method described in the above technical solution in lubricating the industrial robot transmission system.

[0021] The invention provides an industrial robot reducer lubricating oil, comprising a base material and an anti-foaming agent, wherein the mass of the anti-foaming agent is 0.001-0.02% of the mass of the base material; the base material comprises the following components in percentage by mass: 87.0-96.0% of water-soluble polyalkylene glycol, 3.0-10.0% of oil-soluble polyether, 0.5-1.5% of antioxidant, 0.05-0.1% of metal passivator, 0.3-1.0% of extreme pressure anti-wear agent, 0.1-0.3% of friction reducer, and 0.05-0.1% of rust inhibitor; the antioxidant is a hindered phenol-substituted imidazole ditrifluoromethylsulfonate ionic liquid, N-phenyl-alkylnaphthalene-1-amine and alkylphenol. The present invention uses water-soluble polyalkylene glycol and oil-soluble polyether as base oil components, and while fully utilizing the excellent viscosity-temperature performance and tribological performance of polyalkylene glycol, improves the disadvantages of poor compatibility of sealing materials and poor solubility in other additives when polyalkylene glycol is used alone, so that the base oil component maintains good comprehensive performance. The present invention uses sterically hindered phenol-substituted imidazole ditrifluoromethylsulfonate ionic liquid, N-phenyl-alkylnaphthalene-1-amine and alkylphenol as antioxidants, and the components have good positive synergistic effects with each other. Compared with the commonly used antioxidants in traditional lubricating oils (such as T501), the anti-oxidation performance of lubricating oils can be greatly improved, the premature oxidation decay of lubricating oils can be avoided, and the oil change cycle and service life can be extended. The invention introduces antioxidant, metal passivator, extreme pressure anti-wear agent, friction reducer, rust inhibitor and anti-foaming agent and multiple functional additives, and there are extremely complex interactions between different additives. The lubricating oil in the invention does not contain nano inorganic solid additives, and the lubricating oil can have excellent viscosity-temperature performance, oxidation resistance and low temperature performance while the amount of each additive is small, and has good friction reduction performance, extreme pressure anti-wear performance, anti-foaming performance and rubber compatibility. The lubricating oil provided by the invention can be used for the lubrication of the six-axis multi-stage reducer transmission system of the industrial robot, and the raw material compatibility is reasonable, the preparation method is simple, and the application range is wide. DETAILED DESCRIPTION

[0022] The present invention provides an industrial robot reducer lubricating oil, comprising a base material and an anti-foaming agent, wherein the mass of the anti-foaming agent is 0.001 to 0.02% of the mass of the base material;

[0023] The matrix material includes the following components in percentage by mass:

[0024] Water-soluble polyalkylene glycol 87.0-96.0%, oil-soluble polyether 3.0-10.0%, antioxidant 0.5-1.5%, metal passivator 0.05-0.1%, extreme pressure anti-wear agent 0.3-1.0%, friction reducer 0.1-0.3%, rust inhibitor 0.05-0.1%;

[0025] The antioxidant is a hindered phenol-substituted imidazole ditrifluoromethanesulfonate ionic liquid, N-phenyl-alkylnaphthalene-1-amine and alkylphenol.

[0026] In the present invention, unless otherwise specified, the raw materials used are commercially available products well known to those skilled in the art or can be prepared by methods well known to those skilled in the art.

[0027] The industrial robot reducer lubricant provided by the present invention comprises a base material and an anti-foaming agent. The base material in the industrial robot reducer lubricant of the present invention comprises 87.0 to 96.0% of water-soluble polyalkylene glycol (PAG), preferably 91.0 to 95.0%, and more preferably 92.0 to 93.0%. In the present invention, the kinematic viscosity of the water-soluble polyalkylene glycol at 40°C is preferably 40 to 2200 mm 2 / s, more preferably 50 to 1500 mm 2 / s, more preferably 90 to 1150 mm 2 / s, and further preferably 99.08 to 1042 mm 2 / s. In the present invention, the raw materials for preparing the water-soluble polyalkylene glycol preferably include ethylene oxide and propylene oxide, and the molar ratio of ethylene oxide to propylene oxide is preferably 50-70:30-50. In the present invention, the water-soluble polyalkylene glycol preferably includes synthetic oil SDM-03C and synthetic oil SDM-08D, and the mass ratio of synthetic oil SDM-03C to synthetic oil SDM-08D is preferably 1:0.2-0.8, more preferably 1:0.3-0.6, and further preferably 1:0.4-0.5. In an embodiment of the present invention, the synthetic oil SDM-03C and the synthetic oil SDM-08D are purchased from Nanjing Will Chemical Co., Ltd.

[0028] In terms of mass percentage, the base material in the elevator traction machine lubricating oil of the present invention includes 3.0-10.0% of oil-soluble polyether (OSP), preferably 4.0-7.0%, and more preferably 5.0-6.0%. In the present invention, the kinematic viscosity of the oil-soluble polyether at 40°C is preferably 15-250 mm 2 / s, more preferably 20 to 50 mm 2 / s, more preferably 29 to 35 mm 2 / s. In the present invention, the raw materials for preparing the oil-soluble polyether preferably include monomers and initiators; the monomers preferably include butylene oxide and propylene oxide, and the molar ratio of butylene oxide to propylene oxide is preferably 40-60:40-60; the initiator is preferably an alcohol compound, more preferably n-butanol. In the present invention, the oil-soluble polyether is preferably synthetic oil OSP32. In an embodiment of the present invention, the synthetic oil OSP32 was purchased from Nanjing Gutian Chemical Co., Ltd., and the kinematic viscosity at 40°C is 31.35 mm 2 / s.

[0029] The present invention adopts water-soluble polyalkylene glycol and oil-soluble polyether as base oil components, both of which are synthetic oils. While fully utilizing the excellent viscosity-temperature performance and tribological performance of polyalkylene glycol, the disadvantages of poor compatibility of sealing materials and poor solubility in other additives when polyalkylene glycol is used alone are improved, so that the base oil component maintains good comprehensive performance.

[0030] In terms of mass percentage, the base material in the industrial robot reducer lubricant of the present invention includes 0.5-1.5% antioxidant, preferably 0.6-1.0%. In the present invention, the antioxidant is a hindered phenol-substituted imidazole ditrifluoromethylsulfonate ionic liquid, N-phenyl-alkylnaphthalene-1-amine and alkylphenol; the mass of the hindered phenol-substituted imidazole ditrifluoromethylsulfonate ionic liquid is preferably 0.1-0.5% of the total mass of the base material, more preferably 0.2-0.3%; the mass ratio of the N-phenyl-alkylnaphthalene-1-amine to the alkylphenol is preferably 1-3:1, more preferably 1.5-2:1. In the present invention, the hindered phenol-substituted imidazole ditrifluoromethylsulfonate ionic liquid is preferably 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butyl imidazole ditrifluoromethylsulfonate; the N-phenyl-alkylnaphthalene-1-amine is preferably N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine; the alkylphenol is preferably 2,6-di-tert-butyl-p-cresol. In the present invention, the N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine is preferably IRGANOX L06 of BASF, and the 2,6-di-tert-butyl-p-cresol is preferably Additin RC7110 of LANSESS. The present invention has no special limitation on the source of the 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butyl imidazole ditrifluoromethyl sulfonate, and it can be prepared by a method well known to those skilled in the art (CN200910117591.X A kind of antioxidant ionic liquid containing hindered phenol and its preparation method and application). The present invention preferably uses 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butyl imidazole ditrifluoromethyl sulfonate, N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine and 2,6-di-tert-butyl-p-cresol as antioxidants, which can improve the antioxidant performance of lubricating oil and prevent premature oxidation and decay.

[0031] In terms of mass percentage, the base material in the lubricating oil for the industrial robot reducer of the present invention includes 0.05-0.1% of a metal passivator, preferably 0.06-0.09%, and more preferably 0.07-0.08%. In the present invention, the metal passivator is preferably a benzotriazole derivative, and the benzotriazole derivative is preferably N,N-dibutylaminomethylmethylenebenzotriazole. In the present invention, the N,N-dibutylaminomethylmethylenebenzotriazole is preferably T551 of Changsha Wangcheng Petrochemical Co., Ltd. The present invention preferably uses a benzotriazole derivative as a metal passivator, which can improve the anti-corrosion protection performance of the lubricating oil for the industrial robot reducer.

[0032] In terms of mass percentage, the base material in the industrial robot reducer lubricant of the present invention includes 0.3-1.0% of extreme pressure anti-wear agent, preferably 0.5-0.8%, and more preferably 0.6-0.7%. In the present invention, the extreme pressure anti-wear agent is preferably dialkyl dithiocarbamate, dioctyl phosphate dodecylamine salt and tri-n-butyl thiophosphate, and the mass ratio of the dialkyl dithiocarbamate, dioctyl phosphate dodecylamine salt and tri-n-butyl thiophosphate is preferably 0.1-0.5:0.1-0.2:0.1-0.3, more preferably 0.2-0.3:0.1-0.2:0.1-0.2; the dialkyl dithiocarbamate is preferably dibutyl dithiocarbamate. In the present invention, the dibutyl dithiocarbamate is preferably VANLUBE 7723 of Vanderbilt, the dioctyl phosphate dodecylamine salt is preferably Irgalube 349 of BASF, and the tri-n-butyl thiophosphate is preferably JA89 of Taiyuan Anrun Petroleum Lubricant Additive Co., Ltd. The present invention preferably uses dialkyl dithiocarbamate, dioctyl phosphate dodecylamine salt and tri-n-butyl thiophosphate as extreme pressure anti-wear agents, and the components have good positive synergistic effects with each other. Compared with sulfurized isobutylene in traditional lubricating oils, the extreme pressure and anti-wear properties of lubricating oils can be greatly improved, and the corrosion and wear problems caused by active sulfur are avoided, the contradiction between extreme pressure and corrosion resistance is solved, and the overall performance of lubricating oils is balanced; at the same time, the load-bearing capacity of lubricating oils can be improved, and the irritating odor problem is eliminated.

[0033] In terms of mass percentage, the base material in the industrial robot reducer lubricating oil of the present invention includes 0.1-0.3% of friction reducer, preferably 0.15-0.25%, and more preferably 0.2%. In the present invention, the friction reducer is preferably oleic acid glycol ester. In the present invention, the oleic acid glycol ester is preferably T403B of Jinzhou Kangtai Lubricant Additive Co., Ltd. The present invention preferably uses oleic acid glycol ester as a friction reducer, which has good friction reduction performance, can reduce the friction coefficient of lubricating oil, is beneficial to improve the transmission efficiency of the industrial robot reducer in practical applications, and has good compatibility with other additives.

[0034] In terms of mass percentage, the base material in the industrial robot reducer lubricating oil of the present invention includes 0.05-0.1% of the rust inhibitor, preferably 0.06-0.09%, and more preferably 0.07-0.08%. In the present invention, the rust inhibitor is preferably heptadecenyl imidazoline alkenyl succinate. In the present invention, the heptadecenyl imidazoline alkenyl succinate is preferably T703 of Shanghai Midgard Chemical Co., Ltd. The present invention preferably uses heptadecenyl imidazoline alkenyl succinate as the rust inhibitor, which not only has good rust prevention performance, but also has good compatibility with other additives.

[0035] The lubricating oil of the industrial robot reducer of the present invention includes an antifoaming agent, and the mass of the antifoaming agent is 0.001-0.02% of the mass of the base material, preferably 0.005-0.01%. In the present invention, the antifoaming agent is preferably a silicon antifoaming agent and a non-silicon antifoaming agent; the silicon antifoaming agent is preferably polymethyl silicone oil; the non-silicon antifoaming agent is preferably polyacrylate. In the present invention, the mass ratio of the silicon antifoaming agent and the non-silicon antifoaming agent is preferably 1-3:1-3, more preferably 1-2:1-2. In the present invention, the silicon antifoaming agent polymethyl silicone oil is preferably T901 of Shanghai Shenpu Fine Chemical Factory, and the non-silicon antifoaming agent polyacrylate is preferably T912 of Shanghai Shenpu Fine Chemical Factory. The present invention limits the amount of the antifoaming agent to the above range, which can maintain certain foam characteristics, avoid the occurrence of dry friction caused by the destruction of the oil film due to bubbles in the use of the industrial robot reducer, and at the same time avoid the excessive addition affecting the air release characteristics of the product.

[0036] The present invention provides a method for preparing the lubricating oil for the industrial robot reducer described in the above technical solution, comprising the following steps:

[0037] The lubricating oil for the industrial robot reducer is obtained by mixing water-soluble polyalkylene glycol, oil-soluble polyether, antioxidant, metal passivator, extreme pressure anti-wear agent, friction reducer, rust inhibitor and anti-foaming agent.

[0038] The present invention preferably mixes water-soluble polyalkylene glycol with oil-soluble polyether to obtain a base oil component; adds the antioxidant, metal passivator, extreme pressure anti-wear agent, friction reducer, rust inhibitor and anti-foaming agent to the base oil component under stirring at 60-80°C, continues stirring at 60-80°C for 3-5 hours after the addition is completed to make the obtained mixed material uniform and transparent, and obtains industrial robot reducer lubricating oil after cooling. In an embodiment of the present invention, the mixing is preferably carried out in a stainless steel blending kettle with a stirrer.

[0039] The present invention provides the use of the industrial robot reducer lubricating oil described in the above technical solution or the industrial robot reducer lubricating oil prepared by the preparation method described in the above technical solution in lubricating the industrial robot transmission system.

[0040] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Some of the raw materials involved in the following examples and comparative examples include:

[0042] The water-soluble polyalkylene glycols include synthetic oil SDM-03C and synthetic oil SDM-08D, both of which were purchased from Nanjing Well Chemical Co., Ltd. The kinematic viscosity of synthetic oil SDM-03C at 40°C is 99.08 mm 2 / s, the kinematic viscosity of synthetic oil SDM-08D at 40°C is 1042mm 2 / s;

[0043] Oil-soluble polyether (OSP) synthetic oil OSP32 was purchased from Nanjing Gutian Chemical Co., Ltd., with a kinematic viscosity of 31.35 mm at 40 °C. 2 / s;

[0044] N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine is IRGANOX L06 from BASF;

[0045] 2,6-di-tert-butyl-p-cresol is Additin RC7110 from LANSESS;

[0046] N,N-dibutylaminomethylmethylenebenzotriazole is T551 from Changsha Wangcheng Petrochemical Co., Ltd.;

[0047] Dibutyl dithiocarbamate is VANLUBE 7723 from Vanderbilt Company;

[0048] Dioctyl phosphate dodecylamine salt is Irgalube 349 from BASF;

[0049] Tri-n-butyl thiophosphate is JA89 from Taiyuan Anrun Petroleum Additives Company;

[0050] The ethylene glycol oleate is T403B produced by Jinzhou Kangtai Lubricant Additives Co., Ltd.;

[0051] Heptadecenyl imidazoline succinate is T703 from Shanghai Midgard Chemical Co., Ltd.;

[0052] The silicone antifoaming agent polymethyl silicone oil is T901 from Shanghai Shenpu Fine Chemical Factory;

[0053] The non-silicon antifoaming agent polyacrylate is T912 from Shanghai Shenpu Fine Chemical Factory;

[0054] 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butylimidazole ditrifluoromethylsulfonate was prepared according to the method of Example 5 in CN200910117591.X.

[0055] The lubricating oils for industrial robot reducers in the following examples and comparative examples were all prepared in a stainless steel blending kettle with a stirrer.

[0056] Example 1

[0057] 26.5 g of water-soluble polyalkylene glycol synthetic oil SDM-08D and 10.0 g of oil-soluble polyether synthetic oil OSP32 were added to 60.5 g of water-soluble polyalkylene glycol synthetic oil SDM-03C, and the mixture was heated to 70 ± 5 °C and stirred. Then, 0.5 g of 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butylimidazole ditrifluoromethylsulfonate, 0.75 g of N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine, and 0.25 g of 2,6-di-tert-butyl-p-cresol were added. , 0.1g of N,N-dibutylaminomethylmethylenebenzotriazole, 0.5g of dibutyl dithiocarbamate, 0.2g of dioctyl phosphate dodecylamine salt, 0.3g of tri-n-butyl thiophosphate, 0.3g of ethylene glycol oleate, 0.1g of heptadecenyl imidazoline succinate, 0.0133g of silicon-based antifoaming agent polymethyl silicone oil and 0.0067g of non-silicone antifoaming agent polyacrylate, stir at 70±5℃ for 3h, cool to room temperature (25℃) to obtain industrial robot reducer lubricating oil.

[0058] Example 2

[0059] 23.5 g of water-soluble polyalkylene glycol synthetic oil SDM-08D and 5.0 g of oil-soluble polyether synthetic oil OSP32 were added to 69.5 g of water-soluble polyalkylene glycol synthetic oil SDM-03C, the temperature was raised to 70±5°C and stirred, and then 0.3 g of 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butylimidazole ditrifluoromethylsulfonate, 0.47 g of N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine, 0.23 g of 2,6-di-tert-butyl-p-cresol, 0. 0.07g of N,N-dibutylaminomethylmethylenebenzotriazole, 0.3g of dibutyl dithiocarbamate, 0.18g of dioctyl phosphate dodecylamine salt, 0.18g of tri-n-butyl thiophosphate, 0.2g of ethylene glycol oleate, 0.07g of heptadecenyl imidazoline succinate, 0.005g of silicon-based antifoaming agent polymethyl silicone oil and 0.005g of non-silicon-based antifoaming agent polyacrylate, stir at 70±5℃ for 3h, cool to room temperature (25℃) to obtain industrial robot reducer lubricating oil.

[0060] Example 3

[0061] 22.5 g of water-soluble polyalkylene glycol synthetic oil SDM-08D and 3.0 g of oil-soluble polyether synthetic oil OSP32 were added to 73.5 g of water-soluble polyalkylene glycol synthetic oil SDM-03C, and the mixture was heated to 70±5°C and stirred. Then, 0.1 g of 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butylimidazole ditrifluoromethylsulfonate, 0.2 g of N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine, 0.2 g of 2,6-di-tert-butyl-p-cresol, and 0. 0.05g of N,N-dibutylaminomethylmethylenebenzotriazole, 0.1g of dibutyl dithiocarbamate, 0.1g of dioctyl phosphate dodecylamine salt, 0.1g of tri-n-butyl thiophosphate, 0.1g of ethylene glycol oleate, 0.05g of heptadecenyl imidazoline succinate, 0.0003g of silicon-based antifoaming agent polymethyl silicone oil and 0.0007g of non-silicon-based antifoaming agent polyacrylate, stir at 70±5℃ for 3h, cool to room temperature (25℃) to obtain industrial robot reducer lubricating oil.

[0062] Comparative Example 1

[0063] An industrial robot reducer lubricating oil was prepared according to Example 3, except that 0.1 g of 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butylimidazole ditrifluoromethylsulfonate, 0.2 g of N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine and 0.2 g of 2,6-di-tert-butyl-p-cresol were replaced with 0.25 g of N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine and 0.25 g of 2,6-di-tert-butyl-p-cresol.

[0064] Comparative Example 2

[0065] An industrial robot reducer lubricating oil was prepared according to Example 3, except that 0.1 g of dibutyl dithiocarbamate, 0.1 g of dioctyl phosphate dodecylamine salt and 0.1 g of tri-n-butyl thiophosphate were replaced with 0.15 g of dioctyl phosphate dodecylamine salt and 0.15 g of tri-n-butyl thiophosphate.

[0066] Comparative Example 3

[0067] An industrial robot reducer lubricating oil was prepared according to Example 3, except that 0.1 g of 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butylimidazole ditrifluoromethylsulfonate, 0.2 g of N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine and 0.2 g of 2,6-di-tert-butyl-p-cresol were replaced with 0.1 g of 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-hexylimidazole hexafluorophosphate, 0.2 g of N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine and 0.2 g of 2,6-di-tert-butyl-p-cresol.

[0068] The performance tests were performed on the industrial robot reducer lubricating oils prepared in the examples and comparative examples. The results are shown in Table 1.

[0069] Table 1 Performance test results of industrial robot reducer lubricating oil prepared in Examples and Comparative Examples

[0070]

[0071]

[0072] As can be seen from Table 1, the industrial robot reducer lubricant provided by the present invention has outstanding viscosity-temperature performance (viscosity index greater than 230), antioxidant performance (rotating oxygen bomb greater than 1000min) and low temperature performance (pour point ≤-45°C without adding pour point depressant), and has good friction reduction performance, extreme pressure and anti-wear performance, anti-foaming performance and rubber compatibility. At the same time, compared with Comparative Example 1, the industrial robot reducer lubricant prepared in Example 3 has excellent antioxidant performance, indicating that the present invention uses 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butylimidazole ditrifluoromethylsulfonate, N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine and 2,6-di-tert-butyl-p-cresol to produce a good positive synergistic effect, which is beneficial to improving the antioxidant performance of the lubricant, excellent oxidation stability and thermal stability, and is beneficial to preventing sludge formation, ensuring that the oil product has a long oil change period of more than 10,000h and a long service life; compared with Comparative Example 2, Example 3 The prepared industrial robot reducer lubricating oil has excellent extreme pressure and anti-wear properties, indicating that the present invention adopts dibutyl dithiocarbamate, dioctyl phosphate dodecylamine salt and tri-n-butyl thiophosphate to produce a good synergistic effect. On the basis of being beneficial to improving the extreme pressure performance of the lubricating oil, it can also improve the corrosion resistance and anti-wear properties when using traditional active sulfur additives; compared with Comparative Example 3, the industrial robot reducer lubricating oil prepared in Example 3 adopts 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butylimidazole ditrifluoromethylsulfonate, has a lower friction coefficient, and exhibits more excellent friction reduction performance.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An industrial robot reducer lubricant, comprising a base material and an antifoaming agent, wherein the mass of the antifoaming agent is 0.001 to 0.02% of the mass of the base material; The matrix material includes the following components in percentage by mass: Water-soluble polyalkylene glycol 87.0-96.0%, oil-soluble polyether 3.0-10.0%, antioxidant 0.5-1.5%, metal passivator 0.05-0.1%, extreme pressure anti-wear agent 0.3-1.0%, friction reducer 0.1-0.3%, rust inhibitor 0.05-0.1%; The antioxidant is a hindered phenol-substituted imidazole ditrifluoromethylsulfonate ionic liquid, N-phenyl-alkylnaphthalene-1-amine and alkylphenol, wherein the hindered phenol-substituted imidazole ditrifluoromethylsulfonate ionic liquid is 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-3-butyl imidazole ditrifluoromethylsulfonate; the N-phenyl-alkylnaphthalene-1-amine is N-phenyl-1,1,3,3-tetramethylbutylnaphthalene-1-amine; and the alkylphenol is 2,6-di-tert-butyl-p-cresol; The extreme pressure anti-wear agent is dialkyl dithiocarbamate, dioctyl phosphate dodecylamine salt and tri-n-butyl thiophosphate, and the mass ratio of the dialkyl dithiocarbamate, dioctyl phosphate dodecylamine salt and tri-n-butyl thiophosphate is 0.1-0.5:0.1-0.2:0.1-0.

3.

2. The industrial robot reducer lubricating oil according to claim 1, characterized in that: The mass of the hindered phenol-substituted imidazole ditrifluoromethanesulfonate ionic liquid is 0.1-0.5% of the total mass of the industrial robot reducer lubricating oil; the mass ratio of the N-phenyl-alkylnaphthalene-1-amine to the alkylphenol is 1-3:

1.

3. The industrial robot reducer lubricating oil according to claim 1, characterized in that: The water-soluble polyalkylene glycol includes synthetic oil SDM-03C and synthetic oil SDM-08D; the kinematic viscosity of the water-soluble polyalkylene glycol at 40° C. is 40 to 2200 mm 2 / s.

4. The lubricating oil for industrial robot reducer according to claim 1, characterized in that: The kinematic viscosity of the oil-soluble polyether at 40°C is 15 to 250 mm 2 / s; the raw materials for preparing the oil-soluble polyether include monomers and initiators, the monomers include butylene oxide and propylene oxide, and the initiator is an alcohol compound.

5. The lubricating oil for industrial robot reducer according to claim 1, characterized in that: The friction reducer is ethylene glycol oleate.

6. The lubricating oil for industrial robot reducer according to claim 1, characterized in that: The metal passivator is a benzotriazole derivative; the rust inhibitor is heptadecenyl imidazoline alkenyl succinate; and the antifoaming agent is a silicon-type antifoaming agent and a non-silicon-type antifoaming agent.

7. The method for preparing the lubricating oil for the industrial robot reducer according to any one of claims 1 to 6, comprising the following steps: The lubricating oil for the industrial robot reducer is obtained by mixing water-soluble polyalkylene glycol, oil-soluble polyether, antioxidant, metal passivator, extreme pressure anti-wear agent, friction reducer, rust inhibitor and anti-foaming agent.

8. Use of the industrial robot reducer lubricant oil according to any one of claims 1 to 6 or the industrial robot reducer lubricant oil prepared by the preparation method according to claim 7 in lubrication of an industrial robot transmission system.

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