CN112195054A - Low-noise bearing lubricating grease and preparation method thereof - Google Patents
Low-noise bearing lubricating grease and preparation method thereof Download PDFInfo
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- CN112195054A CN112195054A CN201911425592.0A CN201911425592A CN112195054A CN 112195054 A CN112195054 A CN 112195054A CN 201911425592 A CN201911425592 A CN 201911425592A CN 112195054 A CN112195054 A CN 112195054A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
- C10M2203/1025—Aliphatic fractions used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/106—Naphthenic fractions
- C10M2203/1065—Naphthenic fractions used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/025—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with condensed rings
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/16—Naphthenic acids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/287—Partial esters
- C10M2207/289—Partial esters containing free hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/40—Fatty vegetable or animal oils
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/066—Arylene diamines
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention discloses low-noise bearing lubricating grease and a preparation method thereof, and relates to the technical field of bearing lubricating grease. The grease is prepared by taking naphthenic base refined mineral oil and paraffin base refined mineral oil as base oil, taking medium-long chain hydroxyl fatty acid lithium soap as a thickening agent and adding a structure improving agent, an antioxidant and an antirust agent. Adding naphthenic base refined mineral oil and paraffin base refined mineral oil according to a specified weight ratio by adopting a normal-pressure triple stirring kettle, adding medium-long chain hydroxy fatty acid, a structure improver and metallic alkali lithium, performing saponification reaction at 95-115 ℃, and saponifying for 1-2 hours; heating to 209-211 deg.C for refining, maintaining the temperature for 0-5 min, transferring to an intermediate kettle to 150-160 deg.C through a filter and a quenching mixer, circularly filtering step by step, cooling to 90-100 deg.C, adding additives, filtering, degassing, and packaging. The invention has good covering property and low noise; good mechanical stability and long service life; has good high and low temperature performance, and the use temperature can reach-20 to 130 ℃.
Description
Technical Field
The invention relates to the technical field of bearing lubricating grease, in particular to low-noise bearing lubricating grease with short fibers and long service life and a preparation method thereof.
Background
Bearings have found widespread use in the home industry, and normal use of equipment depends largely on whether the bearings are balanced and quiet in operation. Whether the bearing is muted or not depends mainly on the vibration and noise level of the bearing, so that the vibration and the noise not only become the technical indexes of the bearing, but also serve as important diagnosis indexes and become one of the comprehensive indexes for judging the quality of the bearing.
As the demand for low noise sealed bearings increases, foreign grease companies have successively introduced low noise greases. With the development of the bearing industry, the bearing industry puts higher requirements on the silencing and service life of the lubricating grease.
The chemical industry in China starts late, and has certain gap compared with developed countries such as western countries and Japan, so the refining degree of raw materials is not higher than that of the developed countries of western countries, especially Japan. The low-noise lubricating product produced by domestic raw materials has long grease fiber, short service life and coarse noise, after the lubricating grease is refined at a high temperature, the soap fiber is dissolved in the base oil to form a lubricating grease solution, and the lubricating grease solution slowly forms slender fibers to adsorb the base oil in the cooling process, so that a three-dimensional framework is formed, and the base oil of Newtonian bodies is changed into non-Newtonian bodies (as shown in figure 3). Greases formed from long and thin fibers have poor shear stability and require low levels of thickener, which also reduces the useful life of the grease.
Therefore, the development and preparation of the lubricating grease with short fiber, ultra-silence and long service life are very consistent with the market demand.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide low-noise bearing lubricating grease and a preparation method thereof, and aims to solve the problems that low-noise lubricating products produced by domestic raw materials in the background art are long in grease fiber, short in service life and thick in noise, and the market needs lubricating grease with short fiber, ultra-silence and long service life.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a low-noise bearing lubricating grease is prepared by taking naphthenic base refined mineral oil and paraffin base refined mineral oil as base oil, taking medium-long chain hydroxy fatty acid lithium soap as a thickening agent and adding a structure improver, an antioxidant and an antirust agent, wherein the weight ratio of each component is as follows:
naphthenic refined mineral oil: 20-70 parts of;
paraffin-based refined mineral oil: 20-70 parts of;
medium-long chain hydroxy fatty acid: 8-10;
metallic alkali lithium: 0.5-0.7;
a structure-improving agent: 0.5 to 1;
antioxidant: 0.5 to 1;
antirust agent: 0.1-0.5.
As a further improvement of the invention, the naphthenic refined mineral oil has the kinematic viscosity of 75-95mm at 40 DEG C2/s。
As a further improvement of the invention, the paraffin-based refined mineral oil has the kinematic viscosity of 75-95mm at 40 DEG C2/s。
As a further improvement of the invention, the medium-long-chain hydroxy fatty acid is an octadecyl carbon chain saturated hydroxy fatty acid or palmitic acid or a mixture thereof.
As a further improvement of the present invention, the structure-improving agent is naphthenic acid.
As a further improvement of the invention, the antioxidant is one or a mixture of N, N' -di-sec-butyl-p-phenylenediamine, 2, 6-di-tert-butyl-p-cresol or 2-naphthol.
As a further improvement of the invention, the antirust agent is one or a mixture of sorbitol monooleate, dinonyl naphthalene zinc naphthenate or lanolin magnesium soap.
The invention also provides a preparation method of the low-noise bearing lubricating grease, which comprises the following steps:
(a) adding naphthenic base refined mineral oil, paraffin base refined mineral oil, medium-long chain hydroxy fatty acid, a structure improver and metallic alkali lithium according to a specified weight ratio by adopting a normal-pressure triple stirring kettle, carrying out saponification reaction at 95-115 ℃, and saponifying for 1-2 hours;
(b) heating to 209-211 ℃ for refining, and keeping the temperature for 0-5 minutes;
(c) transferring the mixture to an intermediate kettle through a filter and a quenching mixer to cool to 150 ℃ and 160 ℃;
(d) circulating and filtering step by step: filtering with 200 meshes for 1h, filtering with 250 meshes for 1h, filtering with 300 meshes for 1h, and filtering with 400 meshes for 1 h;
(e) cooling to 90-100 deg.C, adding antioxidant and antirust agent, filtering, degassing, and packaging.
(III) advantageous effects
Compared with the prior art, after the technical scheme is adopted, the invention has the beneficial effects that:
1. the low-noise bearing lubricating grease has excellent low-noise performance, and can stabilize the noise value within 1-2 seconds to be 18-20 dB;
2. the low-noise bearing lubricating grease disclosed by the invention has good mechanical stability and longer service life;
3. the low-noise bearing lubricating grease disclosed by the invention has good low temperature, and can be used normally under the condition of ensuring that the equipment is at a low temperature of (-20 ℃);
4. the low-noise bearing lubricating grease disclosed by the invention has good high and low temperature performances, and the service temperature can reach 130 ℃.
Drawings
FIG. 1 is a flow diagram of a manufacturing process of the present invention;
FIG. 2 is a schematic view of a quench mixer according to the present invention;
FIG. 3 is a structural view of a slow-cooling soap fiber obtained by electron microscopy;
fig. 4 is a structure view of a quenched soap fiber obtained by an electron microscope.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a low-noise bearing lubricating grease is prepared by taking naphthenic base refined mineral oil and paraffin base refined mineral oil as base oil, taking medium-long chain hydroxy fatty acid lithium soap as a thickening agent and adding a structure improver, an antioxidant and an antirust agent, wherein the weight ratio of each component is as follows:
naphthenic refined mineral oil: 40-45;
paraffin-based refined mineral oil: 40-45;
medium-long chain hydroxy fatty acid: 8-10;
metallic alkali lithium: 0.5-0.7;
a structure-improving agent: 0.5 to 1;
antioxidant: 0.5 to 1;
antirust agent: 0.1-0.5.
Referring to fig. 1, a method for preparing low noise bearing grease includes the following steps:
(a) adding naphthenic base refined mineral oil, paraffin base refined mineral oil, medium-long chain hydroxy fatty acid, a structure improver and metallic alkali lithium according to a specified weight ratio by adopting a normal-pressure triple stirring kettle, carrying out saponification reaction at 95-115 ℃, and saponifying for 1-2 hours;
(b) heating to 209-211 ℃ for refining, and keeping the temperature for 0-5 minutes;
(c) transferring the mixture to an intermediate kettle through a filter and a quenching mixer to cool to 150 ℃ and 160 ℃;
(d) circulating and filtering step by step: filtering with 200 meshes for 1h, filtering with 250 meshes for 1h, filtering with 300 meshes for 1h, and filtering with 400 meshes for 1 h;
(e) cooling to 90-100 deg.C, adding antioxidant and antirust agent, filtering, degassing, and packaging.
Referring to fig. 2, the quenching mixer includes a housing 1, a feed inlet 2 is disposed at one end of the housing 1, and a discharge outlet 3 is disposed at the other end; the inside one side of shell 1 is provided with orifice plate 4 along length direction, and the inside opposite side of shell 1 is provided with screw 5 along length direction, and screw 5 is parallel with orifice plate 4, and screw 5's one end passes through bearing 6 and rotatably connects inside shell 1, and its other end extends shell 1 and is connected with the power take off of motor (the motor is not shown in the figure). The hot soap and the cold oil in the reaction kettle are crossed in a pumping mode, and the speed is high, so that the cold oil and the hot soap are fully mixed by buffering with the orifice plate 4. The mixed soap is stirred by a propeller 5, so that the length of fibers generated by the materials is uniform, and excellent noise reduction performance is obtained.
Example two:
a low-noise bearing lubricating grease is prepared by taking naphthenic base refined mineral oil and paraffin base refined mineral oil as base oil, taking medium-long chain hydroxy fatty acid lithium soap as a thickening agent and adding a structure improver, an antioxidant and an antirust agent, wherein the weight ratio of each component is as follows:
naphthenic refined mineral oil: 60-70 parts of;
paraffin-based refined mineral oil: 20-30 parts of;
medium-long chain hydroxy fatty acid: 8-10;
metallic alkali lithium: 0.5-0.7;
a structure-improving agent: 0.5 to 1;
antioxidant: 0.5 to 1;
antirust agent: 0.1-0.5.
Referring to fig. 1, a method for preparing low noise bearing grease includes the following steps:
(a) adding naphthenic base refined mineral oil, paraffin base refined mineral oil, medium-long chain hydroxy fatty acid, a structure improver and metallic alkali lithium according to a specified weight ratio by adopting a normal-pressure triple stirring kettle, carrying out saponification reaction at 95-115 ℃, and saponifying for 1-2 hours;
(b) heating to 209-211 ℃ for refining, and keeping the temperature for 0-5 minutes;
(c) transferring the mixture to an intermediate kettle through a filter and a quenching mixer to cool to 150 ℃ and 160 ℃;
(d) circulating and filtering step by step: filtering with 200 meshes for 1h, filtering with 250 meshes for 1h, filtering with 300 meshes for 1h, and filtering with 400 meshes for 1 h;
(e) cooling to 90-100 deg.C, adding antioxidant and antirust agent, filtering, degassing, and packaging.
Example three:
a low-noise bearing lubricating grease is prepared by taking naphthenic base refined mineral oil and paraffin base refined mineral oil as base oil, taking medium-long chain hydroxy fatty acid lithium soap as a thickening agent and adding a structure improver, an antioxidant and an antirust agent, wherein the weight ratio of each component is as follows:
naphthenic refined mineral oil: 20-30 parts of;
paraffin-based refined mineral oil: 60-70 parts of;
medium-long chain hydroxy fatty acid: 8-10;
metallic alkali lithium: 0.5-0.7;
a structure-improving agent: 0.5 to 1;
antioxidant: 0.5 to 1;
antirust agent: 0.1-0.5.
Referring to fig. 1, a method for preparing low noise bearing grease includes the following steps:
(a) adding naphthenic base refined mineral oil, paraffin base refined mineral oil, medium-long chain hydroxy fatty acid, a structure improver and metallic alkali lithium according to a specified weight ratio by adopting a normal-pressure triple stirring kettle, carrying out saponification reaction at 95-115 ℃, and saponifying for 1-2 hours;
(b) heating to 209-211 ℃ for refining, and keeping the temperature for 0-5 minutes;
(c) transferring the mixture to an intermediate kettle through a filter and a quenching mixer to cool to 150 ℃ and 160 ℃;
(d) circulating and filtering step by step: filtering with 200 meshes for 1h, filtering with 250 meshes for 1h, filtering with 300 meshes for 1h, and filtering with 400 meshes for 1 h;
(e) cooling to 90-100 deg.C, adding antioxidant and antirust agent, filtering, degassing, and packaging.
The results of the analysis of the physical and chemical properties of the greases obtained according to examples 1 to 3 are given in the following table:
in conclusion, the grease solution after high-temperature refining and filtering and the base oil at room temperature are rapidly cooled to 150-160 ℃ by the quenching mixer, short-fiber soap is generated by quenching (as shown in figure 4), the internal structure of the quenching mixer is composed of a pore plate and a propeller (as shown in figure 2), the shear stability of the short-fiber grease is good, the thickening agent content is high, and the excellent service life of the grease is ensured. The soap fiber is filtered step by a filter and then repeatedly ground by hydraulic equipment for multiple times, so that more perfect soap fiber is obtained, the soap fiber has excellent low-noise performance, the noise value can be stabilized within 1-2 seconds to be 18-20dB, and the service life is prolonged. The low-temperature performance is good, and the normal use of the equipment under the low-temperature condition is ensured; has good high and low temperature performance, and the use temperature can reach 130 ℃.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A low-noise bearing lubricating grease is characterized in that the lubricating grease is prepared by taking naphthenic base refined mineral oil and paraffin base refined mineral oil as base oil, taking medium-long chain hydroxy fatty acid lithium soap as a thickening agent and adding a structure improver, an antioxidant and an antirust agent, wherein the weight ratio of each component is as follows:
naphthenic refined mineral oil: 20-70 parts of;
paraffin-based refined mineral oil: 20-70 parts of;
medium-long chain hydroxy fatty acid: 8-10;
metallic alkali lithium: 0.5-0.7;
a structure-improving agent: 0.5 to 1;
antioxidant: 0.5 to 1;
antirust agent: 0.1-0.5.
2. The low-noise bearing grease as claimed in claim 1, wherein the naphthenic refined mineral oil has a kinematic viscosity at 40 ℃ of 75-95mm2/s。
3. The low-noise bearing grease as claimed in claim 1, wherein the paraffin-based refined mineral oil has a kinematic viscosity of 75-95mm at 40 ℃2/s。
4. A low noise bearing grease according to claim 1 wherein the medium-long chain hydroxy fatty acid is an octadecane chain saturated hydroxy fatty acid or palmitic acid or a mixture thereof.
5. The low noise bearing grease of claim 1 wherein the structure-improving agent is naphthenic acid.
6. The low noise bearing grease of claim 1 wherein the antioxidant is one or a mixture of N, N' -di-sec-butyl-p-phenylenediamine, 2, 6-di-tert-butyl-p-cresol or 2-naphthol.
7. The low noise bearing grease of claim 1 wherein the rust inhibitor is one or a mixture of sorbitol monooleate, zinc dinonylnaphthalene naphthenate or lanolin magnesium soap.
8. A preparation method of low-noise bearing grease is characterized by comprising the following steps:
(a) adding naphthenic base refined mineral oil, paraffin base refined mineral oil, medium-long chain hydroxy fatty acid, a structure improver and metallic alkali lithium according to a specified weight ratio by adopting a normal-pressure triple stirring kettle, carrying out saponification reaction at 95-115 ℃, and saponifying for 1-2 hours;
(b) heating to 209-211 ℃ for refining, and keeping the temperature for 0-5 minutes;
(c) transferring the mixture to an intermediate kettle through a filter and a quenching mixer to cool to 150 ℃ and 160 ℃;
(d) circulating and filtering step by step: filtering with 200 meshes for 1h, filtering with 250 meshes for 1h, filtering with 300 meshes for 1h, and filtering with 400 meshes for 1 h;
(e) cooling to 90-100 deg.C, adding antioxidant and antirust agent, filtering, degassing, and packaging.
9. A low noise bearing grease according to claim 8 wherein the quench mixer comprises a housing (1), one end of the housing (1) is provided with a feed inlet (2) and the other end is provided with a discharge outlet (3); the inside one side of shell (1) is provided with orifice plate (4) along length direction, and the inside opposite side of shell (1) is provided with screw (5) along length direction, and screw (5) are parallel with orifice plate (4), and the one end of screw (5) is passed through bearing (6) and is rotatably connected inside shell (1), and its other end extends shell (1) and is connected with the power take off of motor.
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| CN201911425592.0A CN112195054A (en) | 2019-12-23 | 2019-12-23 | Low-noise bearing lubricating grease and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114907904A (en) * | 2022-05-31 | 2022-08-16 | 重庆海德世拉索系统（集团）有限公司 | Lubricating grease for electric stay bar of electric backdoor of automobile and preparation method thereof |
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| CN102311847A (en) * | 2011-04-26 | 2012-01-11 | 东莞市安美润滑科技有限公司 | Preparation method of low-noise grease lubricant for miniature bearing with high precision and density |
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