CN116004304A - Preparation method of high-low temperature lubricating grease for speed reducer - Google Patents

Abstract

The invention discloses a preparation method of high-low temperature lubricating grease for a speed reducer, which is prepared by compounding the following raw materials in parts by weight: 65-85 parts of base oil, 10-15 parts of 12 hydroxystearic acid, 3-8 parts of sebacic acid, 2-7 parts of boric acid, 2-5 parts of lithium hydroxide, 2-8 parts of calcium hydroxide, 3-5 parts of a multi-effect additive and 2-5 parts of isotactic polypropylene (IPP). The high-low temperature lubricating grease prepared by the invention can solve the lubrication problem in severe environment, is particularly suitable for long-life lubrication of bearings, shafts and other parts of the speed reducer, prolongs the service life of the speed reducer, improves the lubrication effect, reduces environmental pollution, has less replacement times, has long service life and greatly reduces the running cost.

Description

Preparation method of high-low temperature lubricating grease for speed reducer

Technical Field

The invention belongs to the technical field of high-low temperature lubricating grease for a speed reducer, and particularly relates to a preparation method of high-low temperature lubricating grease for the speed reducer.

Background

The speed reducer plays a role in matching rotational speed and transmitting torque between a prime motor and a working machine or an actuating mechanism, and is widely applied to modern machines. The speed reducer can be divided into a general speed reducer and a special speed reducer according to purposes, and the design, manufacturing and using characteristics of the general speed reducer and the special speed reducer are different. The speed reducer mainly comprises transmission parts (gears or worms), shafts, bearings, a box body and accessories thereof, lubrication in the parts plays a decisive role, the operation of equipment and the service life of the equipment can be influenced by the fact that lubrication is not in place, the application range and environment of the speed reducer are wide, and the operation requirement of the speed reducer can be met only by selecting proper lubricating grease.

The high-low temperature lubricating grease for the speed reducer has good wide temperature performance, oxidation resistance, corrosion resistance, water spray resistance and extreme pressure performance, and is particularly suitable for lubrication and protection of the speed reducer.

Disclosure of Invention

The invention solves the technical problem of providing the preparation method of the high-low temperature lubricating grease for the speed reducer, which can solve the lubrication problem in severe environment, is particularly suitable for long-life lubrication of the bearing, the shaft and other parts of the speed reducer, prolongs the service life of the speed reducer, improves the lubrication effect, reduces the environmental pollution, has less replacement times when using the high-low temperature lubricating grease, has long service life and greatly reduces the running cost.

The invention adopts the following technical scheme to solve the technical problems, and is a preparation method of high-low temperature lubricating grease for a speed reducer, which is characterized by comprising the following specific steps:

step S1, adding 65-85 parts by weight of base oil into a saponification kettle, stirring, heating to 78 ℃, adding 10-15 parts by weight of 12 hydroxystearic acid into the saponification kettle, stirring for dissolving, adding 3-8 parts by weight of sebacic acid after the 12 hydroxystearic acid is fully dissolved, and continuously stirring to obtain a mixed solution;

step S2, respectively dissolving 2-5 parts by weight of lithium hydroxide and 2-8 parts by weight of calcium hydroxide in water to form a lithium hydroxide aqueous solution and a calcium hydroxide aqueous solution, and sequentially adding the lithium hydroxide aqueous solution and the calcium hydroxide aqueous solution into a saponification kettle to obtain a mixed solution when the temperature of the mixed solution obtained in the step S1 is increased to 80-95 ℃;

s3, diluting 2-7 parts by weight of boric acid with 90 ℃ water to obtain a boric acid solution, adding the boric acid solution after stirring the mixed solution obtained in the step S4 for 10-20 minutes, controlling the temperature to be 95-100 ℃ for saponification for 2-3 hours, continuously stirring, heating up and dehydrating after the saponification is finished, heating up to 130-150 ℃ for 20-40 minutes, and continuously heating up to 210-225 ℃ for 10-20 minutes;

and S4, after finishing the constant temperature, adding 2-5 parts by weight of isotactic polypropylene (IPP) when stirring and cooling to 180 ℃, adding 3-5 parts by weight of multi-effect additive when continuously stirring and cooling to 120 ℃, continuously stirring uniformly, and completely transferring to a synthesis kettle when cooling to 80 ℃, cooling, grinding, degassing, filtering, and refining to obtain the high-low temperature lubricating grease of the speed reducer, wherein the multi-effect additive is prepared by mixing a benzotriazole derivative (T-551) and a phoxim dioctyl basic zinc salt (T203) in a mass ratio of 1:1.

Further defined, the base oil in step S1 is one or more of a synthetic oil, a 500SN oil, or a poly & olefin mineral oil.

Compared with the prior art, the invention has the following advantages and beneficial effects: the invention provides the high-low temperature lubricating grease for the speed reducer, which has reasonable formula and high working efficiency, has excellent wide temperature performance, oxidation resistance, corrosion resistance, extreme pressure wear resistance, water resistance and protection, is particularly suitable for the lubrication work of the speed reducer working under severe environmental conditions, greatly improves the performances in various aspects, ensures that the speed reducer shaft, the bearing and the like are not easy to damage in the running process, and effectively reduces the use cost.

Detailed Description

The specific technical scheme of the present invention will be described in detail with reference to specific embodiments.

Example 1

Step S1, adding 70Kg of synthetic oil into a saponification kettle, stirring, heating to 78 ℃, adding 10Kg of 12-hydroxy stearic acid into the saponification kettle, stirring for dissolving, adding 3Kg of sebacic acid after the 12-hydroxy stearic acid is fully dissolved, and continuously stirring to obtain a mixed solution;

step S2, respectively dissolving 5Kg of lithium hydroxide and 3Kg of calcium hydroxide in water to form a lithium hydroxide aqueous solution and a calcium hydroxide aqueous solution, and sequentially adding the lithium hydroxide aqueous solution and the calcium hydroxide aqueous solution into a saponification kettle to obtain a mixed solution when the temperature of the mixed solution obtained in the step S1 is increased to 80-95 ℃;

s3, diluting 2Kg of boric acid with 90 ℃ water to obtain a boric acid solution, adding the boric acid solution after stirring the mixed solution obtained in the step S4 for 10 minutes, controlling the temperature to be 95-100 ℃ for saponification reaction for 2 hours, continuously stirring, heating up and dehydrating after the saponification reaction is finished, heating up to 130-150 ℃ for 30 minutes, and continuously heating up to 210-225 ℃ for 15 minutes;

and S4, after finishing the constant temperature, adding 2Kg of isotactic polypropylene (IPP) when stirring and cooling to 180 ℃, adding 5Kg of multi-effect additive when continuously stirring and cooling to 120 ℃, continuously stirring uniformly, and completely transferring to a synthesis kettle when cooling to 80 ℃, cooling, grinding, degassing, filtering, and refining to obtain the high-low temperature lubricating grease of the speed reducer, wherein the multi-effect additive is prepared by mixing a benzotriazole derivative (T-551) and a phosphorus-sulfur dioctyl basic zinc salt (T203) in a mass ratio of 1:1.

Example 2

Step S1, adding 65Kg of synthetic oil into a saponification kettle, stirring, heating to 78 ℃, adding 15Kg of 12-hydroxy stearic acid into the saponification kettle, stirring for dissolving, adding 3Kg of sebacic acid after the 12-hydroxy stearic acid is fully dissolved, and continuously stirring to obtain a mixed solution;

s2, respectively dissolving 5Kg of lithium hydroxide and 2Kg of calcium hydroxide in water to form a lithium hydroxide aqueous solution and a calcium hydroxide aqueous solution, and sequentially adding the lithium hydroxide aqueous solution and the calcium hydroxide aqueous solution into a saponification kettle to obtain a mixed solution when the temperature of the mixed solution obtained in the step S1 is increased to 80-95 ℃;

s3, diluting 7Kg of boric acid with 90 ℃ water to obtain a boric acid solution, adding the boric acid solution after stirring the mixed solution obtained in the step S4 for 10 minutes, controlling the temperature to be 95-100 ℃ for saponification reaction for 2 hours, continuously stirring, heating up and dehydrating after the saponification reaction is finished, heating up to 130-150 ℃ for 30 minutes, and continuously heating up to 210-225 ℃ for 15 minutes;

and S4, after finishing the constant temperature, stirring and cooling to 180 ℃, adding 3Kg of isotactic polypropylene (IPP), continuously stirring and cooling to 120 ℃, adding 4Kg of multi-effect additive, continuously stirring uniformly, cooling to 80 ℃, completely transferring to a synthesis kettle, cooling, grinding, degassing, filtering, and refining to obtain the high-low temperature lubricating grease of the speed reducer, wherein the multi-effect additive is prepared by mixing a benzotriazole derivative (T-551) and a phosphorus-sulfur dioctyl basic zinc salt (T203) in a mass ratio of 1:1.

Example 3

Step S1, adding 85Kg of synthetic oil into a saponification kettle, stirring, heating to 78 ℃, adding 10Kg of 12-hydroxy stearic acid into the saponification kettle, stirring for dissolving, adding 8Kg of sebacic acid after the 12-hydroxy stearic acid is fully dissolved, and continuously stirring to obtain a mixed solution;

step S2, respectively dissolving 2Kg of lithium hydroxide and 8Kg of calcium hydroxide in water to form a lithium hydroxide aqueous solution and a calcium hydroxide aqueous solution, and sequentially adding the lithium hydroxide aqueous solution and the calcium hydroxide aqueous solution into a saponification kettle to obtain a mixed solution when the temperature of the mixed solution obtained in the step S1 is increased to 80-95 ℃;

s3, diluting 5Kg of boric acid with 90 ℃ water to obtain a boric acid solution, adding the boric acid solution after stirring the mixed solution obtained in the step S4 for 10 minutes, controlling the temperature to be 95-100 ℃ for saponification reaction for 2 hours, continuously stirring, heating up and dehydrating after the saponification reaction is finished, heating up to 130-150 ℃ for 30 minutes, and continuously heating up to 210-225 ℃ for 15 minutes;

and S4, after finishing the constant temperature, adding 5Kg of isotactic polypropylene (IPP) when stirring and cooling to 180 ℃, adding 3Kg of multi-effect additive when continuously stirring and cooling to 120 ℃, continuously stirring uniformly, and completely transferring to a synthesis kettle when cooling to 80 ℃, cooling, grinding, degassing, filtering, and refining to obtain the high-low temperature lubricating grease of the speed reducer, wherein the multi-effect additive is prepared by mixing a benzotriazole derivative (T-551) and a phosphorus-sulfur dioctyl basic zinc salt (T203) in a mass ratio of 1:1.

While the basic principles of the invention have been shown and described, there are various changes and modifications to the invention, which fall within the scope of the invention as hereinafter claimed, without departing from the spirit and scope of the invention.

Claims (2)

1. A preparation method of high-low temperature lubricating grease for a speed reducer is characterized by comprising the following specific steps:

step S1, adding 65-85 parts by weight of base oil into a saponification kettle, stirring, heating to 78 ℃, adding 10-15 parts by weight of 12 hydroxystearic acid into the saponification kettle, stirring for dissolving, adding 3-8 parts by weight of sebacic acid after the 12 hydroxystearic acid is fully dissolved, and continuously stirring to obtain a mixed solution;

step S2, respectively dissolving 2-5 parts by weight of lithium hydroxide and 2-8 parts by weight of calcium hydroxide in water to form a lithium hydroxide aqueous solution and a calcium hydroxide aqueous solution, and sequentially adding the lithium hydroxide aqueous solution and the calcium hydroxide aqueous solution into a saponification kettle to obtain a mixed solution when the temperature of the mixed solution obtained in the step S1 is increased to 80-95 ℃;

s3, diluting 2-7 parts by weight of boric acid with 90 ℃ water to obtain a boric acid solution, adding the boric acid solution after stirring the mixed solution obtained in the step S4 for 10-20 minutes, controlling the temperature to be 95-100 ℃ for saponification for 2-3 hours, continuously stirring, heating up and dehydrating after the saponification is finished, heating up to 130-150 ℃ for 20-40 minutes, and continuously heating up to 210-225 ℃ for 10-20 minutes;

and S4, after finishing the constant temperature, adding 2-5 parts by weight of isotactic polypropylene (IPP) when stirring and cooling to 180 ℃, adding 3-5 parts by weight of multi-effect additive when continuously stirring and cooling to 120 ℃, continuously stirring uniformly, and completely transferring to a synthesis kettle when cooling to 80 ℃, cooling, grinding, degassing, filtering, and refining to obtain the high-low temperature lubricating grease of the speed reducer, wherein the multi-effect additive is prepared by mixing a benzotriazole derivative (T-551) and a phoxim dioctyl basic zinc salt (T203) in a mass ratio of 1:1.

2. The method for preparing the high-low temperature lubricating grease for the speed reducer according to claim 1, which is characterized by comprising the following steps: the base oil in step S1 is one or more of synthetic oil, 500SN oil or poly & olefin mineral oil.