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Water-based lubricating medium for closed water-lubricated propulsion system of ship and preparation method of water-based lubricating medium

A technology of lubricating medium and propulsion system, used in lubricating parts, lubricating compositions, engine lubrication, etc., can solve the problems of equipment material falling off, reducing service life, damage to shafts and bearings, etc., to prolong service life and reduce air bubbles The effect of forming and defoaming fast

Active Publication Date: 2021-09-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term cavitation will cause equipment material to fall off, damage shafts and bearings, and reduce service life

Method used

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  • Water-based lubricating medium for closed water-lubricated propulsion system of ship and preparation method of water-based lubricating medium
  • Water-based lubricating medium for closed water-lubricated propulsion system of ship and preparation method of water-based lubricating medium
  • Water-based lubricating medium for closed water-lubricated propulsion system of ship and preparation method of water-based lubricating medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method of water-based lubricating medium is as follows:

[0037] Mix and stir polydimethylsiloxane and silica nanoparticles at a mass ratio of 10:1, raise the temperature to 120° C. and continue stirring for more than 1 hour to obtain a mixed solution. In order to make the main defoaming medium compatible with water, an emulsifier is added to the mixed liquid (polydimethylsiloxane and emulsion mixture), and the mixed liquid (polydimethylsiloxane) after adding the emulsifier Oxane and emulsion mixture) cooled to 90°C and continued to stir until it was stirred into a milky white liquid, and the additive for the water-based lubricating medium was completed. Add additives to water at a mass ratio of 1:200 to make the water-based lubricating medium. The addition of polydimethylsiloxane increases the viscosity of the water-based lubricating medium, enabling the formation of a thicker lubricating film between friction pairs, increasing the bearing capacity of ...

Embodiment 2

[0039] The preparation method of water-based lubricating medium is as follows:

[0040]Mix and stir polydimethylsiloxane and silica nanoparticles at a mass ratio of 5:1, raise the temperature to 120° C. and continue stirring for more than 1 hour to obtain a mixed solution. In order to make the main defoaming medium compatible with water, an emulsifier is added to the mixed liquid (polydimethylsiloxane and emulsion mixture), and the mixed liquid (polydimethylsiloxane) after adding the emulsifier Oxane and emulsion mixture) cooled to 90°C and continued to stir until it was stirred into a milky white liquid, and the additive for the water-based lubricating medium was completed. Add additives to water at a mass ratio of 1:200 to make the water-based lubricating medium.

Embodiment 3

[0042] The preparation method of water-based lubricating medium is as follows:

[0043] Mix and stir polydimethylsiloxane and silica nanoparticles at a mass ratio of 10:1, raise the temperature to 120° C. and continue stirring for more than 1 hour to obtain a mixed solution. In order to make the main defoaming medium compatible with water, an emulsifier is added to the mixed liquid (polydimethylsiloxane and emulsion mixture), and the mixed liquid (polydimethylsiloxane) after adding the emulsifier Oxane and emulsion mixture) cooled to 90°C and continued to stir until it was stirred into a milky white liquid, and the additive for the water-based lubricating medium was completed. Add additives to water at a mass ratio of 1:600 ​​to make the water-based lubricating medium.

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Abstract

The invention discloses a water-based lubricating medium for a closed water-lubricated propulsion system of a ship and a preparation method of the water-based lubricating medium. The water-based lubricating medium is prepared by the steps of mixing an additive and water according to the proportion, mixing and stirring polydimethylsiloxane and silicon dioxide nanoparticles according to the fixed proportion, increasing the temperature to 100-140 DEG C, continuously conducting stirring for a period of time, and obtaining a mixed solution; adding an emulsifier into the mixed solution, cooling to 80-95 DEG C, and stirring until milk white liquid, namely, the additive, is obtained; and mixing the additive and water according to a fixed proportion, and obtaining the water-based lubricating medium. The polydimethylsiloxane and the nano silicon dioxide particles have certain hydrophobicity, so that generation of bubbles in the water-based lubricating medium can be inhibited, the bubbles can be eliminated, and a shaft and a bearing are protected from cavitation erosion. By utilizing the high viscosity and hydrophobicity of polydimethylsiloxane and silicon dioxide, the friction performance of the water-lubricated bearing is improved, the service life of the shaft and the bearing is prolonged, the operation cost is reduced, and the reliability of an inland ship propulsion system is improved.

Description

technical field [0001] The invention belongs to the field of lubricating media, and in particular relates to a water-based lubricating medium used in a ship's closed water-lubricated propulsion system and a preparation method thereof, which is used for improving the friction performance of closed water-lubricated bearings and prolonging the service life of shafts and bearings. base lubricating medium. Background technique [0002] With the development of the shipbuilding industry, there are more and more ships with large tonnage and high performance, and the industry has higher requirements for the performance of ship propulsion systems under various working conditions. As an important part of the ship's propulsion system, the bearing directly determines the reliability of the ship's work. In the work of the ship propulsion system, the state of lubrication between the bearing and the shaft is very important. The traditional bearing lubrication method is closed oil lubricat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M173/02F16N15/04F16N39/00C10N30/18C10N40/02
CPCC10M173/02F16N15/04F16N39/00C10M2201/105C10M2229/041C10N2030/18C10N2030/64C10N2040/02
Inventor 郭智威黄齐韧袁成清
Owner WUHAN UNIV OF TECH
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