CN102140382A - Hub bearing lubricating grease and preparation method thereof - Google Patents
Hub bearing lubricating grease and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a hub bearing lubricating grease and a preparation method thereof. In the lubricating grease, composite lithium soap is taken as a thickening agent, an antirusting agent, an antioxidant, an extreme-pressure anti-wear agent and a waterproofing agent are added, and a nanometer additive and the like are added according to different proportions. The lubricating grease is prepared by the processes including saponifying, dehydrating, blending, shearing, homogenizing, grinding, filtering, degassing and the like. A lubricating grease composition has the advantages of high dropping point, high wear resistance, high extreme pressure resistance, high high-low temperature performance and the like, has high water resistance and rust resistance, and is suitable for lubricating the automobile bush bearings under harsh working conditions.
Description
Technical field
The present invention relates to lubricating grease and preparation technology thereof, particularly a kind of hub bearing lubricating grease and preparation method thereof.
Background technology
Automobile hub bearing lubricating grease original adoption be that quicklime grease, this lubricating grease that the low condensation point of anhydrous stearic acid multiviscosisty, low viscosity mineral oil form are to use the temperature can not be above 100 ℃; Research and develop sodium base grease subsequently again, the use temperature of sodium base grease is than quicklime grease height, but water resisting property is relatively poor; After researched and developed barium based grease, complex calcium lubricating grease, complex lithium grease etc. again successively.At present, hub bearing lubricating grease is many based on lithium soap or compound lithium soap, as universal lithium base grease, complex lithium grease, extreme pressure compound lithium base grease, automobile universal lithium base grease etc.But in actual the use, hub bearing selects fat and standard code to exist than big-difference, causes hub bearing in use to have the defective of too early lubrication failure.
Along with vehicle operational mode is more and more harsher, to hub bearing lubricating grease spy except more property requirement.Introduced a kind of preparation method among the patent CN101107347A and prevented that bearing from peeling off wearing and tearing at the poly-n-Laurylamine of adding in grease composition, 2 ethyl hexanoic acid bismuth, calcium sulphonate, zinc dithiocarbamate, benzotriazole or derivatives thereof, this lubricating grease also has lubricant effect preferably having under the situation of water intrusion; Introduced a kind of hub bearing lubricating grease that is prepared from polyurea based multiviscosisty mineral oil or synthetic oil among the patent CN101194004A, this lubricating grease has good antistripping wearing and tearing ability, can prolong the work-ing life of bearing under bad working environments simultaneously.Patent CN101273117A has introduced a kind of water-fast hub bearing lubricating grease, and this lubricating grease adopts polyurea compound as viscosifying agent, has added water dispersant and oxidation inhibitor etc., can be that hub bearing is having continuation maintenance good lubricating effect under the situation of water intrusion.More than 3 kinds of patents be not mentioned to the extreme pressure and antiwear behavior of such lubricating grease and the high low-temperature lubrication performance of lubricating grease.
Patent CN101481637A has introduced a kind of method of low temperature refining complex lithium grease, in manufacturing processed, avoid causing base oil and the oxidation in refining process of some additives because refining temperature is too high, thereby effectively improve the anti-oxidative stability of complex lithium grease, and other performance perameters are suitable with conventional complex lithium grease.Its dropping point is up to 320 ℃, but does not also mention the wear-resistant and extreme pressure property of lubricating grease.
Automobile hub bearing just develops towards high speed, heavily loaded direction, and its lubricating requirement is harsh all the more, and it is bigger that hub bearing is operated in the temperature difference mostly, at a high speed, and under the environment such as heavy duty and Duo Shui, mud.Present hub bearing lubricating grease, select for use and use in have some problems.Relatively poor as mechanical stability, colloid stability, adhesivity etc., fat occurs leaking and get rid of the fat phenomenon; Lubricating grease water resisting property is relatively poor, is having water to enter under the situation, lubricated inefficacy easily; The easy oxidation wastage of lubricating grease; The wear-resistant anti-extreme pressure of lubricating grease can be poor; Lubricating grease Applicable temperature scope is little.Thereby the hub bearing lubricating grease that development is fit to wide temperature range, bears heavy duty and adhesivity height, water resisting property is good, seem very necessary.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of hub bearing lubricating grease and preparation method thereof is provided; The present invention compared with prior art, have that extreme pressure anti-wear is good, broad application temperature range, be difficult for oxidation, adhesivity is good, has good waterproof and rustless property simultaneously.
Purpose of the present invention realizes by following proposal:
A kind of hub bearing lubricating grease comprises by mass percentage: the lithium hydroxide alkali aqueous solution of base oil 82～85%, lipid acid 10～14%, recombiner 2%～5%, metering, oxidation inhibitor 0.3%～0.5%, rust-preventive agent 0.3%～0.5%, water-resisting agent 0.05%～0.3%, extreme pressure anti-wear additives 0.8%～1.0%, nano-filled dose 1%～5%.Described lubricating grease also comprises the lithium hydroxide aqueous solution of metering.
Described base oil is the mixing oil of mineral oil, ester class oil, synthin oil, the base oil mineral oil in fluid is that 150BS, synthin oil are PAO 4#, PAO 8# or its mixture, ester class oil are amyl-based polyol high-grade aliphatic ester 100#, 150# or its mixture.
40 ℃ kinematic viscosity of described mixed base oil is (130～150) mm2/s.
Described lipid acid is 12 oxystearic acids and stearic mixture.
Described recombiner is selected C4-C12 dicarboxylic acid and low-carbon-ester thereof for use, as nonane diacid, sebacic acid, Succinic Acid; The preferred sebacic acid of recombiner of the present invention;
It is Phosphorus that oxidation inhibitor mainly is selected from phenols, amine, sulphur, the mixture of preferred di-t-butyl mixed phenol of the present invention and dialkyl diphenylamine, and content is 0.3-0.5%.
Described rust-preventive agent is selected from one in ester class, sulfonate, amine and the sulfur nitrogen heterocycle or its mixture, wherein, preferred sulfonate, sulfur nitrogen heterocycle or its composition, its preferred component is 0.3-0.5%.
Described water-resisting agent is meant that amine is with the epoxide condenses.
Extreme pressure anti-wear additives is selected from sulphur phosphorus Ding Xinjixin salt, high alkaline calcium sulfonate salt, organic sulfide or Organophosphorous compounds, a kind of in the preferred triphenyl-thiophosphate of extreme pressure anti-wear additives of the present invention, zinc dialkyl dithiophosphate, the di-n-butyl phosphite.Preferred deal is 0.8%～1.0%.
Described nano-filled dose is meant a kind of in molybdenumdisulphide, graphite, tungsten disulfide, the silicon-dioxide or more than one; Described nano particle diameter is 0.1 μ m～1.0 μ m, and content is 1%～5%.
Above-mentioned hub bearing preparation of greases method is following steps:
(1) mix: the mixed base oil that is about 1/3, ten dihydroxystearic acids, stearic acid joins reactor, is warmed up to 90～100 ℃, and stirring velocity is 40～50r/min.
(2) saponification reaction: behind the thorough mixing, add the lithium hydroxide aqueous solution measure, set in the reactor temperature to being that 100 ℃～125 ℃, stirring velocity are that 40～50r/min carries out saponification reaction,, suitable make up water in the saponification process.
(3) dehydration: after complex reaction is finished, be rapidly heated 125～130 ℃, dewater, and the insulation certain hour.
(4) complex reaction: to be drained off finishing, make reactant be cooled fast to 90～100 ℃, add 2%～5% recombiner, stirring velocity is under 40r/min～50r/min condition, stir, slowly add the lithium hydroxide aqueous solution of metering, be warming up to 130 ℃～140 ℃, carry out complex reaction.
(5) dehydration: after complex reaction is finished, be rapidly heated 140～150 °, and the insulation certain hour, dewater.
(6) high temperature refining: the complex reaction thing that obtains is continued to be warmed up to 220 ℃～235 ℃, and be incubated 5～10 minutes, stirring velocity is 40r/min～50r/min, under the keeping warm mode, carries out vacuum hydro-extraction, obtains anhydro compounds;
(7) mediation reaction: will add remaining mixed base oil in the anhydro compounds that obtain, be cooled fast to 140 ℃～130 ℃, stirring velocity is 400r/min～50r/min, when treating that temperature is reduced to below 100～120 ℃, add oxidation inhibitor 0.3%～0.5%, rust-preventive agent 0.3%～0.5%, water-resisting agent 0.05%～0.3%, extreme pressure anti-wear additives 0.8%～1.0%, nano-filled dose 1%～5% respectively, stirring velocity is made as 40r/min～50r/min and is in harmonious proportion reaction, promptly obtains being in harmonious proportion reactant;
(8) homogeneous: the mediation reactant that will obtain changes high pressure homogenizer over to, guarantees that the pressure in the high pressure homogenizer is that 25Mp～30Mp carries out homogeneous, obtains the lubricating grease work in-process;
(9) grind: with the lubricating grease work in-process that obtain high-pressure homogeneous after, it is ground;
(10) filter: after grinding, put into strainer, selecting the filter screen particle diameter is 300 orders, is that rotating speed is 3000r/min at motor, and pressure is 1.0MPa, and stirring velocity is made as under 30r/min～40r/min condition and filters;
(11) degassing: the lubricating grease work in-process after filtering, put in the degassing still, pressure is made as negative 0.8MPa, and stirring velocity is made as 30r/min～40r/min and outgases, and promptly obtains hub bearing lubricating grease after the degassing.
The present invention compared with prior art, advantage and effect are: the invention provides a kind of hub bearing grease composition and manufacture method, extreme pressure anti-wear is good, broad application temperature range, be difficult for oxidation, adhesivity is good, has good waterproof and rustless property simultaneously.Under high low temperature, has good lubricating property, the automobile hub bearing of the comparatively harsh operating mode of suitable environment lubricated.And preparation method's production technique simple possible is easy to promote.
Description of drawings
Fig. 1 hub bearing preparation of greases of the present invention method flow synoptic diagram.
Fig. 2 is the particular product performance parameters table of invention hub bearing lubricating grease.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Hub bearing lubricating grease of the present invention comprises by mass percentage: the lithium hydroxide aqueous solution of base oil 82%～85%, lipid acid 10%～14%, recombiner 2%～5%, metering, oxidation inhibitor 0.3%～0.5%, rust-preventive agent 0.3%～0.5%, water-resisting agent 0.05%～0.3%, extreme pressure anti-wear additives 0.8%～1.0%, nano-filled dose 1%～5%.Below in conjunction with Fig. 1 concrete preparation method is described:
(1) mix: the mixed base oil that is about 280g, ten dihydroxystearic acid 80g, stearic acid 20g joins reactor, is warmed up to 100 ℃, and stirring velocity is 40r/min.
Described base oil is the mixing oil of mineral oil, ester class oil, the synthetic hydrocarbon of PAO, and its kinematic viscosity of 100 ℃ is (130) mm2/s.
Described base oil mineral oil in fluid main separation 150BS, synthetic hydrocarbon PAO selects PAO 4#, ester class grease separation amyl-based polyol high-grade aliphatic ester 150#.Base oil content accounts for 84% of lubricating grease total amount.
Described lipid acid is 12 oxystearic acids and stearic mixture; Described 12 oxystearic acids and stearic ratio are 4: 1.
(2) saponification reaction: behind the thorough mixing, add the lithium hydroxide aqueous solution measure, being warmed up to 100 ℃, stirring velocity in reactor is that 50r/min carries out saponification reaction,, obtain the saponification compound;
(3) dehydration: after saponification reaction is finished, be rapidly heated 125 ℃, dewater, and the insulation certain hour.
(4) complex reaction: to be drained off finishing, make reactant be cooled fast to 90 ℃, add 2.5% recombiner 25g, stirring velocity is under the 50r/min condition, stir, slowly add the lithium hydroxide aqueous solution of metering, be warming up to 135 ℃, carry out complex reaction and promptly obtain the complex reaction thing;
Described recombiner is meant sebacic acid.
(5) dehydration: after complex reaction is finished, be rapidly heated 150 ℃, and the insulation certain hour, dewater.
(6) high temperature refining: the complex reaction thing that obtains is continued to be warmed up to 235 ℃, and be incubated 10 minutes, stirring velocity is 50r/min, under the keeping warm mode, carries out vacuum hydro-extraction, obtains anhydro compounds;
(7) mediation reaction: will add remaining mixed base oil 560g in the anhydro compounds that obtain, be cooled fast to 130 ℃, stirring velocity is 50r/min, when treating that temperature is reduced to below 120 ℃, add oxidation inhibitor 3g, rust-preventive agent 3g, water-resisting agent 3g, extreme pressure anti-wear additives 10g respectively, stirring velocity is made as 50r/min and is in harmonious proportion reaction, promptly obtains being in harmonious proportion reactant;
Described oxidation inhibitor is meant the mixture of di-t-butyl mixed phenol (T502) and dialkyl diphenylamine (T9557).
Described rust-preventive agent is meant barium mahogany sulfonate.
Described water-resisting agent is meant that amine is with epoxide condenses (T1001).
Described extreme pressure anti-wear additives is meant triphenyl-thiophosphate (T309).
(8) homogeneous: the mediation reactant that will obtain changes high pressure homogenizer over to, guarantees that the pressure in the high pressure homogenizer is that 25Mp carries out homogeneous, obtains the lubricating grease work in-process;
(9) grind: with the lubricating grease work in-process that obtain high-pressure homogeneous after, it is ground;
(10) filter: after grinding, put into strainer, selecting the filter screen particle diameter is 300 orders, is that rotating speed is 3000r/min at motor, and pressure is 1.0MPa, and stirring velocity is made as under the 30r/min condition and filters;
(11) degassing: the lubricating grease work in-process after filtering, put in the degassing still, pressure is made as negative 0.8MPa, and stirring velocity is made as 30r/min and outgases, and promptly obtains hub bearing lubricating grease after the degassing.
Embodiment 2
(1) mix: the mixed base oil that is about 270g, ten dihydroxystearic acid 80g, stearic acid 20g joins reactor, is warmed up to 100 ℃, and stirring velocity is 40r/min.
Described base oil is the mixing oil of mineral oil, ester class oil, the synthetic hydrocarbon of PAO, and its kinematic viscosity of 100 ℃ is (130) mm2/s.
Described base oil mineral oil in fluid main separation 150BS, synthetic hydrocarbon PAO selects PAO 8#, ester class grease separation amyl-based polyol high-grade aliphatic ester 100#.Base oil content accounts for 83% of lubricating grease total amount.
Described lipid acid is 12 oxystearic acids and stearic mixture; Described 12 oxystearic acids and stearic ratio are 4: 1.
(2) saponification reaction: behind the thorough mixing, add the lithium hydroxide aqueous solution measure, being warmed up to 100 ℃, stirring velocity in reactor is that 50r/min carries out saponification reaction,, obtain the saponification compound;
(3) dehydration: after saponification reaction is finished, be rapidly heated 125 ℃, dewater, and the insulation certain hour.
(4) complex reaction: to be drained off finishing, make reactant be cooled fast to 100 ℃, add 3.5% recombiner 35g, stirring velocity is under the 50r/min condition, stir, slowly add the lithium hydroxide aqueous solution of metering, be warming up to 135 ℃, carry out complex reaction and promptly obtain the complex reaction thing;
Described recombiner is meant sebacic acid.
(5) dehydration: after complex reaction is finished, be rapidly heated 150 °, and the insulation certain hour, dewater.
(6) high temperature refining: the complex reaction thing that obtains is continued to be warmed up to 235 ℃, and be incubated 10 minutes, stirring velocity is 50r/min, under the keeping warm mode, carries out vacuum hydro-extraction, obtains anhydro compounds;
(7) mediation reaction: will add remaining mixed base oil 560g in the anhydro compounds that obtain, be cooled fast to 130 ℃, stirring velocity is 50r/min, when treating that temperature is reduced to below 120 ℃, add oxidation inhibitor 3g, rust-preventive agent 3g, water-resisting agent 3g, extreme pressure anti-wear additives 10g, nano-filled dose of 10g respectively, stirring velocity is made as 50r/min and is in harmonious proportion reaction, promptly obtains being in harmonious proportion reactant;
Described oxidation inhibitor is meant the mixture of di-t-butyl mixed phenol (T502) and dialkyl diphenylamine (T9557).
Described rust-preventive agent is meant barium mahogany sulfonate.
Described water-resisting agent is meant that amine is with epoxide condenses (T1001).
Described extreme pressure anti-wear additives is meant triphenyl-thiophosphate (T309).
Described nano-filled dose is meant that particle diameter is 0.1 two fluidisation tungsten powders.
(8) homogeneous: the mediation reactant that will obtain changes high pressure homogenizer over to, guarantees that the pressure in the high pressure homogenizer is that 25Mp carries out homogeneous, obtains the lubricating grease work in-process;
(9) grind: with the lubricating grease work in-process that obtain high-pressure homogeneous after, it is ground;
(10) filter: after grinding, put into strainer, selecting the filter screen particle diameter is 300 orders, is that rotating speed is 3000r/min at motor, and pressure is 1.0MPa, and stirring velocity is made as under the 30r/min condition and filters;
(11) degassing: the lubricating grease work in-process after filtering, put in the degassing still, pressure is made as negative 0.8MPa, and stirring velocity is made as 30r/min and outgases, and promptly obtains hub bearing lubricating grease after the degassing.
Embodiment 3
(1) mix: the mixed base oil that is about 260g, ten dihydroxystearic acid 80g, stearic acid 20g joins reactor, is warmed up to 100 ℃, and stirring velocity is 40r/min.
Described base oil is the mixing oil of mineral oil, ester class oil, the synthetic hydrocarbon of PAO, and its kinematic viscosity of 100 ℃ is (130) mm2/s.
Described base oil mineral oil in fluid main separation 150BS, synthetic hydrocarbon PAO selects PAO 4# and PAO 8# mixing oil, ester class grease separation amyl-based polyol high-grade aliphatic ester 100# and 150# mixing oil.Base oil content accounts for 82% of lubricating grease total amount.
Described lipid acid is 12 oxystearic acids and stearic mixture; Described 12 oxystearic acids and stearic ratio are 4: 1.
(2) saponification reaction: behind the thorough mixing, add the lithium hydroxide aqueous solution measure, being warmed up to 125 ℃, stirring velocity in reactor is that 50r/min carries out saponification reaction, obtains the saponification compound;
(3) dehydration: after saponification reaction is finished, be rapidly heated 130 ℃, dewater, and the insulation certain hour.
(4) complex reaction: to be drained off finishing, make reactant be cooled fast to 100 ℃, add 3% recombiner 30g, stirring velocity is under the 50r/min condition, stir, slowly add the lithium hydroxide aqueous solution of metering, be warming up to 130 ℃, carry out complex reaction and promptly obtain the complex reaction thing;
Described recombiner is meant sebacic acid.
(5) dehydration: after complex reaction is finished, be rapidly heated 150 ℃, and the insulation certain hour, dewater.
(6) high temperature refining: the complex reaction thing that obtains is continued to be warmed up to 235 ℃, and be incubated 10 minutes, stirring velocity is 50r/min, under the keeping warm mode, carries out vacuum hydro-extraction, obtains anhydro compounds;
(7) mediation reaction: will add remaining mixed base oil 560g in the anhydro compounds that obtain, be cooled fast to 130 ℃, stirring velocity is 50r/min, when treating that temperature is reduced to below 100 ℃, add oxidation inhibitor 3g, rust-preventive agent 3g, water-resisting agent 3g, extreme pressure anti-wear additives 10g, nano-filled dose of 30g respectively, stirring velocity is made as 40r/min～50r/min and is in harmonious proportion reaction, promptly obtains being in harmonious proportion reactant;
Described oxidation inhibitor is meant the mixture of di-t-butyl mixed phenol (T502) and dialkyl diphenylamine (T9557).
Described rust-preventive agent is meant barium mahogany sulfonate.
Described water-resisting agent is meant that amine is with epoxide condenses (T1001).
Described extreme pressure anti-wear additives is meant triphenyl-thiophosphate (T309).
Described nano-filled dose is meant that particle diameter is 1 two fluidisation tungsten powders.
(8) homogeneous: the mediation reactant that will obtain changes high pressure homogenizer over to, guarantees that the pressure in the high pressure homogenizer is that 25Mp carries out homogeneous, obtains the lubricating grease work in-process;
(9) grind: with the lubricating grease work in-process that obtain high-pressure homogeneous after, it is ground;
(10) filter: after grinding, put into strainer, selecting the filter screen particle diameter is 300 orders, is that rotating speed is 3000r/min at motor, and pressure is 1.0MPa, and stirring velocity is made as under the 30r/min condition and filters;
(11) degassing: the lubricating grease work in-process after filtering, put in the degassing still, pressure is made as negative 0.8MPa, and stirring velocity is made as 30r/min and outgases, and promptly obtains hub bearing lubricating grease after the degassing.
The foregoing description only is preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other are any not to deviate from change, the modification done under spirit of the present invention and the principle, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. hub bearing lubricating grease comprises by mass percentage: base oil 82%～85%, lipid acid 10%～14%, recombiner 2%～5%, oxidation inhibitor 0.3%～0.5%, rust-preventive agent 0.3%～0.5%, water-resisting agent 0.05%～0.3%, extreme pressure anti-wear additives 0.8%～1.0%, nano-filled dose 1%～5%.
2. hub bearing lubricating grease according to claim 1 is characterized in that: described base oil is the mixing oil of mineral oil, ester class oil, synthetic hydrocarbon PAO, and its kinematic viscosity of 40 ℃ is (130～150) mm
2/ s; Described lubricating grease also comprises the lithium hydroxide aqueous solution of metering.
3. hub bearing lubricating grease according to claim 1 is characterized in that: described lipid acid is 12 oxystearic acids and stearic mixture, and blending ratio is 4: 1.
4. hub bearing lubricating grease according to claim 1 is characterized in that: described recombiner is a sebacic acid.
5. hub bearing lubricating grease according to claim 1 is characterized in that: described oxidation inhibitor is the mixture of di-t-butyl mixed phenol and dialkyl diphenylamine.
6. hub bearing lubricating grease according to claim 1 is characterized in that: described rust-preventive agent is to be a kind of or its mixture in barium mahogany sulfonate or the benzotriazole.
7. hub bearing lubricating grease according to claim 1 is characterized in that: described water-resisting agent is meant that amine is with the epoxide condenses.
8. hub bearing lubricating grease according to claim 1 is characterized in that: described extreme pressure anti-wear additives is a kind of or mixture in triphenyl-thiophosphate, zinc dialkyl dithiophosphate, the di-n-butyl phosphite.
9. hub bearing lubricating grease according to claim 1 is characterized in that: described nano-filled dose is meant a kind of in molybdenumdisulphide, graphite, tungsten disulfide, the silicon-dioxide or more than one; Described nanometer particle size is 0.1 μ m～1.0 μ m, and content is 1%～5%.
10. each described hub bearing preparation of greases method in the claim 1 to 9 is characterized in that following steps:
(1) mix: the mixed base oil 1/3, ten dihydroxystearic acids, stearic acid joins reactor, is warmed up to 90 ℃～100 ℃, and stirring velocity is 40r/min～50r/min.
(2) saponification reaction: behind the thorough mixing, add the lithium hydroxide aqueous solution measure, set in the reactor temperature to being that 100 ℃～125 ℃, stirring velocity are that 40～50r/min carries out saponification reaction, suitable make up water in the saponification process.
(3) dehydration: after saponification reaction is finished, be rapidly heated 125～130 ℃, dewater, and the insulation certain hour.
(4) complex reaction: to be drained off finishing, make reactant be cooled fast to 90 ℃～100 ℃, the recombiner of adding 2%～5%, stirring velocity is under 40r/min～50r/min condition, stir, slowly add the lithium hydroxide aqueous solution of metering, be warming up to 130 ℃～135 ℃, carry out complex reaction.
(5) dehydration: after complex reaction is finished, be rapidly heated 140～150 °, and the insulation certain hour, dewater.
(6) high temperature refining: the complex reaction thing that obtains is continued to be warmed up to 220 ℃～235 ℃, and be incubated 5～10 minutes, stirring velocity is 40r/min～50r/min, under the keeping warm mode, carries out vacuum hydro-extraction, obtains anhydro compounds;
(7) mediation reaction: will add remaining mixed base oil in the anhydro compounds that obtain, be cooled fast to 140 ℃～130 ℃, stirring velocity is 400r/min～50r/min, when treating that temperature is reduced to below 100～120 ℃, add oxidation inhibitor 0.3%～0.5%, rust-preventive agent 0.3%～0.5%, water-resisting agent 0.05%～0.3%, extreme pressure anti-wear additives 0.8%～1.0%, nano-filled dose 1%～5% respectively, stirring velocity is made as 40r/min～50r/min and is in harmonious proportion reaction, promptly obtains being in harmonious proportion reactant;
(8) homogeneous: the mediation reactant that will obtain changes high pressure homogenizer over to, guarantees that the pressure in the high pressure homogenizer is that 25Mp～30Mp carries out homogeneous, obtains the lubricating grease work in-process;
(9) grind: with the lubricating grease work in-process that obtain high-pressure homogeneous after, it is ground;
(10) filter: after grinding, put into strainer, selecting the filter screen particle diameter is 300 orders, is that rotating speed is 3000r/min at motor, and pressure is 1.0MPa, and stirring velocity is made as under 3040r/min～40r/mi n condition and filters;
(11) degassing: the lubricating grease work in-process after filtering, put in the degassing still, pressure is made as negative 0.8MPa, and stirring velocity is made as 30r/min～40r/min and outgases, and promptly obtains hub bearing lubricating grease after the degassing.
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