CN110951521A

CN110951521A - Lubricating grease special for corrugating machine bearing and preparation method thereof

Info

Publication number: CN110951521A
Application number: CN201911112411.9A
Authority: CN
Inventors: 张卫星; 孙亚峰; 张纯柱; 张元元
Original assignee: Beijing Jun Eagle Lube Oil Processing Plant
Current assignee: Beijing Jun Eagle Lube Oil Processing Plant
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-04-03

Abstract

The invention provides lubricating grease special for a bearing of a corrugating machine and a preparation method thereof, wherein the lubricating grease is mainly prepared from the following components: by weight, 60-70 parts of base oil, 10-20 parts of ester oil, 0.5-3 parts of MCA, 4-8 parts of MDI, 4-6 parts of tallow amine, 0.5-1.5 parts of cyclohexylamine, 0.5-1 part of n-octylamine, 0.5-1 part of boric acid, 0.1-0.5 part of potassium hydroxide and a plurality of parts of conventional additives. The preparation method comprises the following steps: (1) mixing and stirring the base oil and MDI, and heating to 90-120 ℃ for later use; (2) heating and stirring the ester oil to 80-90 ℃ for later use; (3) mixing the substances in the steps (1) and (2), heating to 80-100 ℃, adding tallow amine, cyclohexylamine and n-octylamine in sequence, stirring, and adding other substances. The lubricating grease disclosed by the invention is excellent in performance, particularly shows remarkable high and low temperature resistance and wear resistance, and is very suitable for bearings of corrugating machines.

Description

Lubricating grease special for corrugating machine bearing and preparation method thereof

Technical Field

The invention belongs to the field of lubricating grease, and particularly relates to lubricating grease special for a bearing of a corrugating machine and a preparation method thereof.

Background

Lubricating greases are widely used, and their main functions are lubrication, protection and sealing. Also known as antifriction grease. The antifriction lubricating grease mainly plays a role in reducing mechanical friction and preventing mechanical abrasion, and also has a protection effect of preventing metal corrosion and a sealing dustproof effect. There are greases which are used primarily to prevent the rusting or corrosion of metals and are known as protective greases. For example, industrial petrolatum and the like have a few greases used exclusively for sealing, known as sealing greases, such as thread compound. Grease is mostly semisolid and has unique fluidity.

The service performance of the lubricating grease has different requirements according to different specific application fields. For example, for bearing grease, the purpose is to form a thin oil film between the rolling surface and the sliding surface of the bearing to prevent direct contact between metal and metal, thereby reducing friction and abrasion inside the bearing and preventing burning, and the grease has the following effects on the bearing:

(1) and (3) friction and abrasion are reduced: a bearing ring is formed. The mutual contact part of the rolling body and the retainer prevents metal contact and reduces friction. And (5) abrasion.

(2) And the fatigue life is prolonged: the rolling fatigue life of the bearing is prolonged when the rolling contact surface is well lubricated during rotation. On the other hand, the oil viscosity is low, and the thickness of the lubricating film is not good, which results in a reduction.

(3) Frictional heat is discharged. And (3) cooling: the circulation oil method may use oil to remove heat generated by friction or heat transferred from the outside, thereby achieving a cooling effect. Prevent the bearing from overheating and prevent the lubricating oil from aging.

(4) And others: and also prevents foreign matter from intruding into the interior of the bearing, or prevents rust from occurring. The effect of corrosion.

However, the common bearing grease has poor wear resistance and narrow service temperature range, and cannot be applied to severe working conditions, so that the further application of the bearing grease is limited.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The first purpose of the invention is to provide the lubricating grease which has excellent high temperature resistance and wear resistance and is suitable for the bearing of the corrugating machine, and the lubricating grease realizes great improvement on both high and low temperature resistance and wear resistance through specific component selection and excellent proportion, has long service life, and is durable and environment-friendly.

The second purpose of the invention is to provide the preparation method of the lubricating grease, which has the advantages of simple operation, good repeatability and close connection of the front step and the rear step, and is worthy of wide popularization and application.

In order to achieve the above purpose of the present invention, the following technical solutions are adopted:

the invention provides lubricating grease special for a bearing of a corrugating machine, which is mainly prepared from the following components: by weight, 60-70 parts of base oil, 10-20 parts of ester oil, 0.5-3 parts of MCA, 4-8 parts of MDI, 4-6 parts of tallow amine, 0.5-1.5 parts of cyclohexylamine, 0.5-1 part of n-octylamine, 0.5-1 part of boric acid, 0.1-0.5 part of potassium hydroxide and a plurality of parts of conventional additives.

In the components, the added MCA (melamine cyanurate) mainly plays roles of inflaming retarding, thickening, viscosity increasing, adhesion force improving, abrasion resistance and the like, has lower toxicity compared with other sulfur and phosphorus substances, and is environment-friendly under the condition of smaller addition.

MCA, MDI (isocyanate), base oil and the like form a matching relationship, and the effects of thickening and improving abrasion resistance are achieved together. However, the addition amount is not suitable to be too high, because the consistency is higher, the use environment of the bearing is influenced, and therefore, both MCA and MDI need to be controlled in a proper addition amount range.

The MCA may also be present in amounts of 0.6, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 2.1, 2.2, 2.3, 2.4, 2.6, 2.7 parts by mass.

The boric acid can also be 0.6, 0.65, 0.7, 0.8, 0.95 and the like in parts by mass.

The mass portion of the potassium hydroxide can also be 0.2, 0.35, 0.45 and the like.

The boric acid and the potassium hydroxide are added to play a role in improving the anti-wear effect.

Preferably, the components also comprise 0.01 to 0.03 portion of magnesium hydroxide and 0.01 to 0.03 portion of aluminum hydroxide. In order to further improve the antiwear effect, small amount of magnesium hydroxide and aluminum hydroxide are additionally added into the components.

The tallow amine, the cyclohexylamine and the n-octylamine are mainly thickened polymers and belong to common additive substances in the raw material formula of the lubricating grease, so the invention is not described in detail.

The addition of the ester oil improves the permeability of the whole lubricating grease, so that the lubricating grease can be better fused with a bearing to play a role.

In order to improve the performance of various aspects of the product, preferably, the base oil comprises 62-68 parts by weight of base oil, 12-18 parts by weight of ester oil, 0.8-2 parts by weight of MCA, 5-7.5 parts by weight of MDI, 4.2-5 parts by weight of tallow amine, 0.7-1.2 parts by weight of cyclohexylamine, 0.6-0.9 part by weight of n-octylamine, 0.6-0.9 part by weight of boric acid and 0.15-0.25 part by weight of potassium hydroxide.

In order to further improve the product performance, preferably, the base oil is 65 parts by weight, the ester oil is 15 parts by weight, MCA1 part by weight, MDI 7 part by weight, tallow amine 4.5 parts by weight, cyclohexylamine 0.9 part by weight, n-octylamine 0.6 part by weight, boric acid 0.8 part by weight and potassium hydroxide 0.2 part by weight;

preferably, the base oil is a PAO oil;

preferably, as a further implementable solution, the conventional additives include: according to parts by weight, T-3090.2-0.4 part, antioxidant 0.3-0.6 part, purified water 2-3 parts, silicone oil 4-6 parts, and antirust agent 0.05-0.15 part;

preferably, the antioxidant is diisooctyl diphenylamine.

The conventional additive can be flexibly controlled and added according to the service performance of the product, and the high and low temperature resistance of the product is improved by adding the silicon oil.

In the raw material formula, each component is not only added to play a single role, but is finally matched with other substances to achieve the most excellent effect on the comprehensive performance of the lubricating grease, so that the lubricating grease can ensure the excellent use effect under the severe working condition environment, and each performance parameter is controlled within a proper range.

The lubricating grease is mainly applied to the lubrication of bearings, chains and chain wheels of various corrugated board production lines such as three-layer, five-layer, seven-layer and single-side corrugated board machines, and is also applicable to the lubrication of bearings, chains and chain wheels of other equipment with high and low rotating speeds and high and low temperatures. The quality is better than that of imported similar products, and the service life can be effectively prolonged by more than 3 to 5 times compared with domestic and foreign similar products.

The product characteristics of the lubricating grease are as follows: belongs to an environment-friendly product, and effectively overcomes the phenomena of dripping, overflowing, running, leaking and the like of a bearing and a chain sprocket of equipment. It contains no toxic, harmful and pollutant, no toxicity, no smell and no side effect to skin. The 0.3 to 5 micron particle ultra-fine lubricant material is effective in reducing a certain amount of bearing noise. Has excellent outstanding effects in noise reduction, consumption reduction, energy conservation, environmental protection and the like. The sintering load of similar products in the market is generally below 200 kg/force, the sintering load of the product is more than or equal to 400 kg/force, the product has outstanding extreme pressure abrasion resistance and excellent high and low temperature resistance, the common use temperature of the similar products in the market is about-15-200 ℃, the use temperature of the product is-40-250 ℃, the product is used in harsh environments, and the effect is particularly outstanding.

In addition, the invention also provides a specific preparation method of the lubricating grease, which comprises the following steps:

(1) mixing and stirring the base oil and MDI, and heating to 90-120 ℃ for later use;

(2) heating and stirring the ester oil to 80-90 ℃ for later use;

(3) mixing the substances in the steps (1) and (2), heating to 80-100 ℃, adding tallow amine, cyclohexylamine and n-octylamine in sequence, stirring, and adding other substances.

Preferably, as a further implementable scheme, in the step (3), tallow amine, cyclohexylamine and n-octylamine are sequentially added, stirred, added with water, reacted at 100-110 ℃ for 40-60min, heated, added with silicone oil, continuously heated to 160-170 ℃, cooled to 100 ℃, and then added with the rest of other substances.

The preparation method has reasonable process step design and controllable operation conditions, and is worthy of wide popularization and application.

In actual operation, the method can be carried out according to the following steps:

the first step is as follows: pouring the PAO oil and the MDI material into a stirring A kettle, stirring and heating to about 90-120 ℃, and completely fusing the mixture for later use;

the second step is that: pouring the ester oil into a kettle B, heating and stirring to 80-90 ℃ for later use;

the third step: adding PAO oil and ester oil (the ester oil is poured into the B kettle and then poured into the C kettle after being washed) into the C kettle (a blending kettle with a volume larger than that of the first two kettles) and heating to 80-100 ℃ for later use.

The fourth step: the tallow amine was poured into the C tank, the largest, and stirred up to about 80 ℃ to dissolve all of the tallow amine. Then adding cyclohexylamine and n-octylamine, stirring and preserving heat;

the fifth step: adding the melted mixture in the kettle A into the kettle C with stirring, adding water, reacting the materials in the kettle at 100-110 ℃ for 40-60min, and then heating and adding silicon oil;

and a sixth step: heating the kettle C to 160-170 ℃, cooling to 100 ℃, adding the rest substances, stirring uniformly, injecting into a homogenizer and obtaining a finished product;

the seventh step: and (5) uniformly rolling by using a three-roller grinder and then subpackaging.

Compared with the prior art, the invention has the beneficial effects that:

(1) the high and low temperature resistance and the wear resistance of the lubricating grease are greatly improved;

(2) the lubricating grease has long service life, is durable and environment-friendly;

(3) the lubricating grease has flexible use working conditions, can be suitable for severe working conditions, and has guaranteed stability;

(4) the lubricating grease is specially tailored according to the self characteristics of the bearing of the corrugating machine, and has good use performance.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The solution of the invention is illustrated below by means of specific embodiments:

example 1

The raw materials are proportioned as follows:

60kg of PAO oil, 20kg of ester oil, 0.5kg of MCA, 8kg of MDI, 4kg of tallow amine, 1.5kg of cyclohexylamine, 0.5kg of n-octylamine, 1kg of boric acid, 0.1kg of potassium hydroxide, 0.03kg of magnesium hydroxide, 0.01kg of aluminum hydroxide, T-3090.4 kg, 0.3kg of antioxidant (diisooctyldiphenylamine), 3kg of purified water, 4kg of silicone oil and 0.15kg of antirust agent;

the preparation method comprises the following steps:

Example 2

The specific operation steps are the same as those in example 1, except that the formula of the raw materials is as follows: 70kg of PAO oil, 10kg of ester oil, MCA3kg, 4kg of MDI, 6kg of tallow amine, 0.5kg of cyclohexylamine, 1kg of n-octylamine, 0.5kg of boric acid, 0.5kg of potassium hydroxide, 0.01kg of magnesium hydroxide, 0.03kg of aluminum hydroxide, T-3090.2kg of antioxidant (diisooctyldiphenylamine), 2kg of purified water, 6kg of silicone oil and 0.05kg of antirust agent.

Example 3

The specific operation steps are the same as those in example 1, except that the formula of the raw materials is as follows: 62kg of PAO oil, 18kg of ester oil, 0.8kg of MCA, 7.5kg of MDI, 4.2kg of tallow amine, 1.2kg of cyclohexylamine, 0.7kg of n-octylamine, 0.9kg of boric acid, 0.15kg of potassium hydroxide, 0.02kg of magnesium hydroxide, 0.02kg of aluminum hydroxide, T-3090.3 kg, 0.4kg of antioxidant (diisooctyldiphenylamine), 2.5kg of purified water, 5kg of silicone oil and 0.07kg of antirust agent.

Example 4

The specific operation steps are the same as those in example 1, except that the formula of the raw materials is as follows: 68kg of PAO oil, 12kg of ester oil, MCA2kg, 5kg of MDI, 5kg of tallow amine, 0.7kg of cyclohexylamine, 1.2kg of n-octylamine, 0.6kg of boric acid, 0.25kg of potassium hydroxide, 0.015kg of magnesium hydroxide, 0.015kg of aluminum hydroxide, T-3090.2kg, 0.6kg of antioxidant (diisooctyldiphenylamine), 2kg of purified water, 5.5kg of silicon oil and 0.08kg of antirust agent.

Example 5

The specific operation steps are the same as those in example 1, except that the formula of the raw materials is as follows: 65kg of PAO oil, 15kg of ester oil, MCA1kg, 7kg of MDI, 4.5kg of tallow amine, 0.9kg of cyclohexylamine, 0.6kg of n-octylamine, 0.8kg of boric acid, 0.2kg of potassium hydroxide, 0.015kg of magnesium hydroxide, 0.02kg of aluminum hydroxide, T-3090.3 kg of antioxidant (diisooctyldiphenylamine), 2.5kg of purified water, 5kg of silicone oil and 0.07kg of antirust agent.

Example 6

The procedure was as in example 5 except that magnesium hydroxide was not added.

Example 7

The procedure was as in example 5 except that magnesium hydroxide and aluminum hydroxide were not added.

Comparative example 1

The procedure was as in example 5 except that potassium hydroxide was not added.

Comparative example 2

The specific procedure is identical to example 5, except that no MCA is added.

Comparative example 3

The procedure was as in example 5, except that the amount of MCA added was 0.1 kg.

Comparative example 4

The procedure was as in example 5, except that 5kg of MCA was added.

Comparative example 5

The procedure was as in example 5 except that boric acid was added in an amount of 0.1kg and potassium hydroxide was added in an amount of 1 kg.

Experimental example 1

The grease properties of the examples and comparative examples were measured, and the specific measurement results are shown in table 1 below.

TABLE 1 test results

As can be seen from table 1 above, potassium hydroxide as a component mainly having an anti-wear effect has a certain influence on the anti-wear performance, and also has a relatively poor high temperature resistance when not added, and of course, other hydroxides mainly have a synergistic effect, and if added, may have a synergistic effect.

After MCA, potassium hydroxide, boric acid and other substances are added, an ideal index can be improved on the high and low temperature resistance and the wear resistance of the lubricating grease, and the substances are required to be added according to requirements and controlled within a proper dosage range.

While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims

1. The lubricating grease special for the bearing of the corrugating machine is characterized by being mainly prepared from the following components: by weight, 60-70 parts of base oil, 10-20 parts of ester oil, 0.5-3 parts of MCA, 4-8 parts of MDI, 4-6 parts of tallow amine, 0.5-1.5 parts of cyclohexylamine, 0.5-1 part of n-octylamine, 0.5-1 part of boric acid, 0.1-0.5 part of potassium hydroxide and a plurality of parts of conventional additives.

2. The grease lubricant according to claim 1, wherein the base oil comprises, by weight, 62-68 parts of base oil, 12-18 parts of ester oil, 0.8-2 parts of MCA, 5-7.5 parts of MDI, 4.2-5 parts of tallow amine, 0.7-1.2 parts of cyclohexylamine, 0.6-0.9 part of n-octylamine, 0.6-0.9 part of boric acid, and 0.15-0.25 part of potassium hydroxide.

3. The grease of claim 1, wherein, by weight, 65 parts of base oil, 15 parts of ester oil, 1 part of MCA, 7 parts of MDI, 4.5 parts of tallow amine, 0.9 part of cyclohexylamine, 0.6 part of n-octylamine, 0.8 part of boric acid, and 0.2 part of potassium hydroxide;

preferably, the base oil is a PAO oil;

preferably, the components also comprise 0.01 to 0.03 portion of magnesium hydroxide and 0.01 to 0.03 portion of aluminum hydroxide.

4. A grease according to any of claims 1-3, characterized in that the conventional additives comprise: according to parts by weight, T-3090.2-0.4 part, antioxidant 0.3-0.6 part, purified water 2-3 parts, silicone oil 4-6 parts, and antirust agent 0.05-0.15 part;

preferably, the antioxidant is diisooctyl diphenylamine.

5. A method of preparing a grease according to any of claims 1-4, characterized in that it comprises the steps of:

(2) heating and stirring the ester oil to 80-90 ℃ for later use;

6. The preparation method according to claim 5, wherein in the step (3), tallow amine, cyclohexylamine, and n-octylamine are sequentially added, stirred, added with water, reacted at 100-110 ℃ for 40-60min, heated, added with silicone oil, further heated to 160-170 ℃, cooled to 100 ℃, and added with the rest of other substances.