Water lubricated bearing with high bearing capacity and self lubricity

A water-lubricated bearing, self-lubricating technology, used in bearing cooling, bearing components, shafts and bearings, etc., can solve problems such as uneven dispersion of oil compounds, unstable bearing vibration and radial force, and impact on bearing service life. , to achieve excellent self-lubricating and wear resistance, prevent bearing seizure, and prevent noise.

Active Publication Date: 2014-05-14
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the extensive research on water-lubricated bearing materials, from the iron plow wood initially used to the current natural rubber and synthetic rubber, the main purpose is to select a material that has a good match with the design and water and has excellent lubricating properties in water. Bearing material, but when the bearing is under water shortage or low speed conditions, sufficient water film cannot be formed in the gap between friction pairs, resulting in the failure of elastohydrodynamic lubrication
Chinese patent CN1098877C relates to a polymer material for ship stern bearings, which is composed of caprolactam monomer, long-chain activator, sodium hydroxide, crystal nucleus reagent and oil compound, and is formed by anion-initiated polymerization. The advantage of this type of material is that it can be conveniently formed into water-lubricated bearings, and the material h

Method used

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  • Water lubricated bearing with high bearing capacity and self lubricity
  • Water lubricated bearing with high bearing capacity and self lubricity
  • Water lubricated bearing with high bearing capacity and self lubricity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In a sealed reactor, heat 2000g of polytetrahydrofuran (PTMG, molecular weight 2000) polyol to 100°C with a vacuum of 0.08MPa, and carry out vacuum dehydration for 3 hours to control the water content below 0.05%. Cool the dehydrated PTMG to 60°C, then slowly add 350g of 2,4-toluene diisocyanate (TDI), stir under nitrogen atmosphere, and start to heat up to 80°C±5°C, keep the reaction for 2 hours, and carry out vacuum desorption Remove air bubbles, then add 120g of amino-terminated polydimethylsiloxane (PDMS, molecular weight 1000), stir the reaction, control the temperature of the prepolymer at 65°C, stir to remove air bubbles, and continue for about 90min; wait for the air bubbles to be removed After completion, add 130g of polytetrafluoroethylene, 50g of graphite, and 200g of glass fiber, continue stirring and vacuum to remove air bubbles, and heat 680g of 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA) Melt it, slowly add it to the synthetic polyurethane matrix tha...

Embodiment 2

[0033] In a sealed reactor, heat 2000g of tetrahydrofuran-ethylene oxide-propylene oxide copolyether (PTMG-PO, molecular weight 2000) to 100°C, vacuum at 0.08MPa, and carry out vacuum dehydration for 3 hours to control the water content below 0.05 %. Cool the dehydrated PTMG-PO to 60°C, then slowly add 260g of 2,4-toluene diisocyanate (TDI), stir under a nitrogen atmosphere, and start to heat up to 80°C±5°C, keep the temperature for 2 hours, and carry out Remove the air bubbles in vacuum, then add 180g of hydroxyl-terminated polydimethylsiloxane (PDMS, molecular weight 1000), stir the reaction, control the temperature of the prepolymer at 65°C, start the stirring, and remove the air bubbles for about 90 minutes; After the air bubbles are completely removed, add 360g of polytetrafluoroethylene, 25g of graphite, and 30g of glass fiber, continue stirring and vacuum to remove air bubbles, and 700g of 4,4'-diamino-3,3'-dichlorodiphenylmethane ( MOCA) for heating and melting, after...

Embodiment 3

[0035] In a sealed reactor, heat 2000g of polytetrahydrofuran polyol (PTMG, molecular weight 2000) to 100°C with a vacuum of 0.08MPa, and carry out vacuum dehydration for 3 hours to control the water content below 0.05%. Cool the dehydrated PTMG to 60°C, then slowly add 260g of diphenylmethane-4,4'-diisocyanate (MDI), stir under nitrogen atmosphere, and start to heat up to 80°C ± 5°C, heat preservation reaction 2 After 1 hour, carry out vacuum to remove air bubbles, then add 180g of amino-terminated polydimethylsiloxane (PDMS, molecular weight 1000), stir the reaction, control the temperature of the prepolymer at 65°C, remove air bubbles under stirring, and last for about 90min; after the air bubbles are completely removed, add 360g polytetrafluoroethylene, 100g graphite, and 200g aramid fibers, continue to stir and remove air bubbles in a vacuum, and add 550g 2,4-diamino-3,5-dimethylthio Toluene (DMTDA) is heated and melted, slowly added, quickly stirred and mixed, immediatel...

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PUM

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Abstract

The invention discloses a water lubricated bearing with high bearing capacity and self lubricity. The water lubricated bearing is composed of synthetic polyurethane, a solid lubricant and a fiber reinforcing agent. The bearing has a microstructure being a homogeneous structure, has a hardness of ShoreD55-65, a compression modulus of elasticity of above 600MPa and a dry friction coefficient of 0.20 or less, and has a friction coefficient (water) of 0.25 or less in water environment when the linear velocity is 0.05m/s; and when the linear velocity is greater than 0.5m/s, the friction coefficient (water) is not greater than 0.03, so a use requirement of the radial load of 5-70MPa can be satisfied. When the bearing is in water shortage environment, the bearing has excellent self lubrication and wear resistance performances, can prevent noises and bearing occlusion, and can be widely applied to rotating, swinging or sliding positions of underwater propeller motor drivers, propeller stern bearings, rudder bearings and water pumps.

Description

technical field [0001] The present invention relates to a water-lubricated bearing with high load-carrying and self-lubricating properties, in particular to a bearing with high load-bearing and water-lubricating properties, which exhibits excellent self-lubricating and wear-resistant when the bearing is in a water-deficient environment performance. Background technique [0002] In recent years, people have gradually realized the great significance of protecting the environment and saving energy to the sustainable development of human beings, so the voice of developing new energy-saving and pollution-free products is getting higher and higher. Water-lubricated bearings use water as the lubricating and working medium, which can reduce the environmental pollution of traditional bearings that use oil as the lubricating medium, and save a lot of oil. In addition, water has the advantages of no pollution, wide range of sources, safety and flame retardancy. If water is used instea...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L27/18C08L77/10C08K3/04C08K7/14C08G18/76C08G18/66C08G18/48C08G18/32C08G18/10F16C33/00F16C33/20F16C37/00B29C39/02
Inventor 王宏刚慕波任俊芳杨生荣王金清高贵陈生圣
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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