Lubricating method of water lubricated bearing based on micro oil droplet lubrication start and stop protection

Abstract

The invention belongs to the field of design of sliding bearings, and relates to a lubricating method of a water lubricated bearing based on micro oil droplet lubrication start and stop protection. The lubricating method comprises the following steps: firstly obtaining a critical revolution speed of an oil-water mixed lubricated sliding bearing which achieves hydrodynamic lubrication under a waterlubrication condition, setting the critical revolution speed into a rated revolution speed for a bearing to complete start, inputting the rated revolution speed to a lubricant supply system, carryingout micro oil supply when the oil-water mixed lubricated sliding bearing is started and the revolution speed of the bearing reaches the rated revolution speed, and carrying out oil-water mixed lubrication, thus lowering the speed required for forming the hydrodynamic lubrication, and enabling the oil-water mixed lubricated sliding bearing to be in a hydrodynamic lubrication state; stopping oil supplying when a continuous revolution speed of the bearing is greater than or equal to the rated revolution speed, and lubricating by adopting pure water; enabling the bearing to be in an oil-water mixing stage when equipment requires to stop, thus reducing the duration time of boundary lubrication and mixed lubrication, and stopping oil supplying until the oil-water mixed lubricated sliding bearing stops rotating. A lubricating effect is good.

Description

Technical field: [0001] The invention belongs to the field of sliding bearing design, in particular to a method for lubricating water-lubricated bearings based on micro-oil drop lubrication start-stop protection. Background technique: [0002] As a key component in mechanical transmission, bearings are widely used in industry. Under different working conditions, the load, speed and temperature of the bearing are different, and it will also be affected by various impurities. Therefore, the design and lubrication method of the bearing need to be adjusted according to different working environments. Traditional bearing lubrication mostly uses oil as the lubricating medium, which consumes a large amount of oil resources, and in order to prevent leakage, the bearing must be sealed, making the bearing structure complex. [0003] In order to meet the continuous development of my country's industrial technology and the technical requirements for marine engineering equipment and hig...

AI Technical Summary

Problems solved by technology

Due to the severe bearing wear under boundary lubrication and mixed lubrication conditions, a critical speed can be calculated through the Stribeck curve. When the bearing speed is lower than this speed, the bearing is in the boundary or mixed lubrication stage, which is easy to cause Bearing material wear; only when the bearing speed is higher than this speed, the bearing can be in hydrodynamic lubrication, and the friction pair can be effectively separated by the water film to form good lubrication. Due to the low viscosity of water, the kinematic viscosity of water at 20 ° C ν=1.005×10^(-6)(m 2 / s), the critical speed is relatively high, so the bearing is in the boundary and mixed lubrication for a long time during the start-stop phase, which is likely to cause bearing wear and affect the life and performance of the bearing

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