阅读说明：本技术 一种精密高分子特种润滑脂及其制备方法 (Precise high-molecular special lubricating grease and preparation method thereof ) 是由 周忠太 宋尚珍 齐瑞琴 周翠霞 李保莉 于 2020-11-30 设计创作，主要内容包括：本发明公开了一种精密高分子特种润滑脂,其特征在于,包括以下按重量份计的组分：基础油63-82份、稠化剂7-10份、氢氧化锂(LiOH·H2O)5-10份、胶体石墨2-4份,纳米级轻质碳酸钙3-5份、聚异丁烯2-5份、二聚酸5-8份、硼酸盐3-5份、纤维素1-3份。该特种润滑脂抗高温、抗水淋,抗极压,可对轮带、齿轮进行有效保护,以延长使用寿命,降低使用成本。(The invention discloses a precision high-molecular special lubricating grease which is characterized by comprising the following components in parts by weight: 63-82 parts of base oil, 7-10 parts of a thickening agent, 5-10 parts of lithium hydroxide (LiOH. H2O), 2-4 parts of colloidal graphite, 3-5 parts of nano-scale light calcium carbonate, 2-5 parts of polyisobutylene, 5-8 parts of dimer acid, 3-5 parts of borate and 1-3 parts of cellulose. The special lubricating grease is high temperature resistant, water spray resistant and extreme pressure resistant, can effectively protect a belt and a gear, prolongs the service life and reduces the use cost.)

1. The precision high-molecular special lubricating grease is characterized by comprising the following components in parts by weight: 63-82 parts of base oil, 7-10 parts of a thickening agent, 5-10 parts of lithium hydroxide (LiOH. H2O), 2-4 parts of colloidal graphite, 3-5 parts of nano light calcium carbonate, 2-5 parts of polyisobutylene, 5-8 parts of dimer acid, 3-5 parts of borate and 1-3 parts of cellulose, wherein the thickening agent is a mixture of 40% of boric acid and 60% of stearic acid.

2. The precision polymer special lubricating grease of claim 1, which is characterized by comprising the following components in parts by weight: 66 parts of base oil, 8 parts of thickening agent, 6 parts of lithium hydroxide (LiOH. H2O), 2 parts of colloidal graphite, 4 parts of nano-grade light calcium carbonate, 3 parts of polyisobutylene, 6 parts of dimer acid, 3 parts of borate and 2 parts of cellulose.

3. The preparation method of the precision polymer special lubricating grease as claimed in claim 1, which is characterized by comprising the following steps:

uniformly stirring 7-10 parts by weight of thickening agent and 3-5 parts by weight of nano light calcium carbonate, adding the uniformly stirred thickening agent and 33-40 parts by weight of base oil into a saponification kettle, gradually heating until the thickening agent is dissolved, and starting stirring;

dissolving 5-10 parts of lithium hydroxide (LiOH. H2O) in water to form a lithium hydroxide aqueous solution, adding the lithium hydroxide aqueous solution into a saponification kettle when the temperature of the mixed solution in the step (1) is raised to 60-70 ℃, continuously raising the temperature for saponification, controlling the saponification at the temperature of 90-110 ℃ for 3 hours, and stirring the materials uniformly;

after the saponification reaction is finished, continuously stirring, heating and dehydrating, sampling and measuring the free alkali of the soap base when the temperature reaches 120-130 ℃, continuously heating the qualified materials to 135-140 ℃, adding 30-42 parts by weight of base oil for thickening, adding 5-8 parts by weight of dimer acid and 2-4 parts by weight of colloidal graphite for stirring, continuously heating to 150-160 ℃, keeping the temperature for 15min, adding 2-5 parts by weight of polyisobutylene and 3-5 parts by weight of borate, enabling the content in the kettle to be in a true liquid state, and pumping the lubricating grease into a blending kettle through a filter for reflux cooling;

the lubricating grease is refluxed and cooled for 2 to 4 hours in a blending kettle under stirring, 1 to 3 parts of cellulose is added when the temperature is reduced to 145 ℃ under stirring, the lubricating grease is cooled after being stirred evenly and is ground and filtered by a grinder, and the precision high polymer special lubricating grease is prepared by filtering and refining.

Technical Field

The invention belongs to the technical field of lubricating grease, and particularly relates to precision high-molecular special lubricating grease and a preparation method thereof.

Background

The parts of open gears, belts and the like are often required to be lubricated with lubricating grease with the characteristics of rain resistance, dust resistance, shear resistance, high temperature resistance and the like. The traditional lubrication mode of the part is wet lubrication or spray lubrication, and the traditional lubrication is also adopted. Not only does this approach require frequent maintenance, but the amount of gear wear can reach 2.87mm per year. In addition, under the condition of high temperature, the open gear and the belt often have the problems of lubrication failure, trapezoidal lines on the surface of the belt, large vibration, tooth cracking and the like.

Disclosure of Invention

The invention aims to provide precise high-molecular special lubricating grease suitable for wheel belts and gears working under high-temperature conditions, which is high-temperature resistant, water-spray resistant and extreme-pressure resistant, and can effectively protect the wheel belts and the gears, so that the service life is prolonged, and the use cost is reduced. In addition, the invention also provides a preparation method of the lubricating grease, and the method has the advantages of reasonable raw material proportion, advanced process and low cost.

The invention relates to a precision high-molecular special lubricating grease which is characterized by comprising the following components in parts by weight: 63-82 parts of base oil, 7-10 parts of a thickening agent, 5-10 parts of lithium hydroxide (LiOH. H2O), 2-4 parts of colloidal graphite, 3-5 parts of nano light calcium carbonate, 2-5 parts of polyisobutylene, 5-8 parts of dimer acid, 3-5 parts of borate and 1-3 parts of cellulose, wherein the thickening agent is a mixture of 40% of boric acid and 60% of stearic acid.

The paint comprises the following components in parts by weight: 66 parts of base oil, 8 parts of thickening agent, 6 parts of lithium hydroxide (LiOH. H2O), 2 parts of colloidal graphite, 4 parts of nano-grade light calcium carbonate, 3 parts of polyisobutylene, 6 parts of dimer acid, 3 parts of borate and 2 parts of cellulose.

The method comprises the following steps:

(1) uniformly stirring 7-10 parts by weight of thickening agent and 3-5 parts by weight of nano light calcium carbonate, adding the uniformly stirred thickening agent and 33-40 parts by weight of base oil into a saponification kettle, gradually heating until the thickening agent is dissolved, and starting stirring;

(2) dissolving 5-10 parts of lithium hydroxide (LiOH. H2O) in water to form a lithium hydroxide aqueous solution, adding the lithium hydroxide aqueous solution into a saponification kettle when the temperature of the mixed solution in the step (1) is raised to 60-70 ℃, continuously raising the temperature for saponification, controlling the saponification at the temperature of 90-110 ℃ for 3 hours, and stirring the materials uniformly;

(3) after the saponification reaction is finished, continuously stirring, heating and dehydrating, sampling and measuring the free alkali of the soap base when the temperature reaches 120-130 ℃, continuously heating the qualified materials to 135-140 ℃, adding 30-42 parts by weight of base oil for thickening, adding 5-8 parts by weight of dimer acid and 2-4 parts by weight of colloidal graphite for stirring, continuously heating to 150-160 ℃, keeping the temperature for 15min, adding 2-5 parts by weight of polyisobutylene and 3-5 parts by weight of borate, enabling the content in the kettle to be in a true liquid state, and pumping the lubricating grease into a blending kettle through a filter for reflux cooling;

the lubricating grease is refluxed and cooled for 2 to 4 hours in a blending kettle under stirring, 1 to 3 parts of cellulose is added when the temperature is reduced to 145 ℃ under stirring, the lubricating grease is cooled after being stirred evenly and is ground and filtered by a grinder, and the precision high polymer special lubricating grease is prepared by filtering and refining.

The precision high molecular special lubricating grease is mainly applied to lubrication of a belt and a gear under the high-temperature condition, has a wide working temperature range (-60 ℃ -230 ℃), namely, under the temperature range, a protective oil film with enough thickness can be formed, good abrasion protection performance can be provided under impact load, and the annual abrasion loss of the gear adopting the lubricating grease is 0.478 mm. The lubricating grease is high temperature resistant, water spray resistant and extreme pressure resistant, can effectively protect a belt and a gear, prolongs the service life and reduces the use cost.

Detailed Description

The present invention is described in further detail below with reference to examples, but it should not be construed that the scope of the above subject matter of the present invention is limited to the following examples, and that all the technologies realized based on the above subject matter of the present invention belong to the scope of the present invention.

Example 1

The precision high-molecular special lubricating grease comprises the following components in parts by weight: 66 parts of base oil, 8 parts of thickening agent, 6 parts of lithium hydroxide (LiOH. H2O), 2 parts of colloidal graphite, 4 parts of nano-grade light calcium carbonate, 3 parts of polyisobutylene, 6 parts of dimer acid, 3 parts of borate and 2 parts of cellulose.

The preparation method of the precision high-molecular special lubricating grease comprises the following steps:

(1) uniformly stirring 8 parts by weight of thickening agent and 4 parts by weight of nano-scale light calcium carbonate, adding the uniformly stirred thickening agent and 35 parts by weight of base oil into a saponification kettle, gradually heating until the thickening agent is dissolved, and starting stirring;

(2) dissolving 6 parts of lithium hydroxide (LiOH. H2O) in water to form a lithium hydroxide aqueous solution, adding the lithium hydroxide aqueous solution into a saponification kettle when the temperature of the mixed solution in the step (1) is raised to 60-70 ℃, continuously raising the temperature for saponification, controlling the saponification at 90-110 ℃ for 3H, and stirring the materials uniformly;

(3) after the saponification reaction is finished, continuously stirring, heating and dehydrating, sampling and measuring the free alkali of the soap base when the temperature reaches 120-140 ℃, continuously heating the qualified materials to 135-140 ℃, adding 31 parts by weight of base oil for thickening, adding 6 parts by weight of dimer acid and 2 parts by weight of colloidal graphite for stirring, continuously heating to 150-160 ℃, keeping the temperature for 15min, adding 3 parts by weight of polyisobutylene and 3 parts by weight of borate, making the content in the kettle in a true liquid state, and pumping the lubricating grease into a blending kettle through a filter for reflux cooling;

(4) and (3) refluxing and cooling the lubricating grease in a blending kettle for 2-4h under stirring, adding 2 parts of cellulose when stirring and cooling to 145 ℃, uniformly stirring, cooling, grinding by a grinding machine, filtering, and refining by filtering to obtain the precision high-molecular special lubricating grease.

Example 2

The precision high-molecular special lubricating grease comprises the following components in parts by weight: 63 parts of base oil, 7 parts of a thickening agent, 5 parts of lithium hydroxide (LiOH. H2O), 2 parts of colloidal graphite, 3 parts of nano light calcium carbonate, 2 parts of polyisobutylene, 5 parts of dimer acid, 3 parts of borate and 1 part of cellulose.

The preparation method of the precision high-molecular special lubricating grease comprises the following steps:

(1) uniformly stirring 7 parts by weight of thickening agent and 3 parts by weight of nano-scale light calcium carbonate, adding the uniformly stirred thickening agent and 33 parts by weight of base oil into a saponification kettle, gradually heating until the thickening agent is dissolved, and starting stirring;

(2) dissolving 5 parts of lithium hydroxide (LiOH. H2O) in water to form a lithium hydroxide aqueous solution, adding the lithium hydroxide aqueous solution into a saponification kettle when the temperature of the mixed solution in the step (1) is raised to 60-70 ℃, continuously raising the temperature for saponification, controlling the saponification at 90-110 ℃ for 3H, and stirring the materials uniformly;

(3) after the saponification reaction is finished, continuously stirring, heating and dehydrating, sampling and measuring the free alkali of the soap base when the temperature reaches 120-140 ℃, continuously heating the qualified materials to 135-140 ℃, adding 30 parts by weight of base oil for thickening, adding 5 parts by weight of dimer acid and 2 parts by weight of colloidal graphite for stirring, continuously heating to 150-160 ℃, keeping the temperature for 15min, adding 2 parts by weight of polyisobutylene and 3 parts by weight of borate, making the content in the kettle in a true liquid state, and pumping the lubricating grease into a blending kettle through a filter for reflux cooling;

(4) and (3) refluxing and cooling the lubricating grease in a blending kettle for 2-4h under stirring, adding 1 part of cellulose when stirring and cooling to 145 ℃, uniformly stirring, cooling, grinding by a grinding machine, filtering, and refining by filtering to obtain the precision high-molecular special lubricating grease.

Example 3

The precision high-molecular special lubricating grease comprises the following components in parts by weight: 82 parts of base oil, 10 parts of a thickening agent, 10 parts of lithium hydroxide (LiOH. H2O), 4 parts of colloidal graphite, 5 parts of nano-grade light calcium carbonate, 5 parts of polyisobutylene, 8 parts of dimer acid, 5 parts of borate and 3 parts of cellulose.

The preparation method of the precision high-molecular special lubricating grease comprises the following steps:

(1) uniformly stirring 10 parts by weight of thickening agent and 5 parts by weight of nano-scale light calcium carbonate, adding the uniformly stirred thickening agent and 40 parts by weight of base oil into a saponification kettle, gradually heating until the thickening agent is dissolved, and starting stirring;

(2) dissolving 10 parts of lithium hydroxide (LiOH. H2O) in water to form a lithium hydroxide aqueous solution, adding the lithium hydroxide aqueous solution into a saponification kettle when the temperature of the mixed solution in the step (1) is raised to 60-70 ℃, continuously raising the temperature for saponification, controlling the saponification at 90-110 ℃ for 3H, and stirring the materials uniformly;

(3) after the saponification reaction is finished, continuously stirring, heating and dehydrating, sampling and measuring the free alkali of the soap base when the temperature reaches 120-140 ℃, continuously heating the qualified materials to 135-140 ℃, adding 42 parts by weight of base oil for thickening, adding 8 parts by weight of dimer acid and 4 parts by weight of colloidal graphite for stirring, continuously heating to 150-160 ℃, keeping the temperature for 15min, adding 5 parts by weight of polyisobutylene and 5 parts by weight of borate, making the content in the kettle in a true liquid state, and pumping the lubricating grease into a blending kettle through a filter for reflux cooling;

(4) and (3) refluxing and cooling the lubricating grease in a blending kettle for 2-4h under stirring, adding 3 parts of cellulose when stirring and cooling to 145 ℃, uniformly stirring, cooling, grinding by a grinding machine, filtering, and refining by filtering to obtain the precision high-molecular special lubricating grease.

The gear and wheel belt adopting the traditional lubricating oil generally change oil once every 3 months, and 1.2 tons/unit of oil is added every time, while the precision polymer special lubricating grease in the above examples 1-3 is adopted, and the annual lubricating agent is 200 kilograms. And the wear loss of the open gear under the traditional lubrication mode is 2.87mm per year, and the wear loss after the lubricating grease is adopted is 0.478mm per year.

Compared with other lubricating greases on the market, the precision high polymer special lubricating grease is high-temperature resistant, water-spray resistant and extreme-pressure resistant, is particularly suitable for lubricating the wheel belt and the gear part working under severe environmental conditions, and effectively protects the wheel belt and the gear, so that the service life is prolonged, and the use cost is reduced.

While there have been shown and described what are at present considered to be the principles of the invention, its essential features and advantages, it will be understood that the invention is capable of numerous modifications and variations, all of which are within the scope of the invention as hereinafter claimed.