The basic requirement of China's railway freight car rolling bearing select lubricant

The basic requirement of our country railway freight car rolling bearings choice lubricant - 2020 06 - 19 the choice of rolling bearing lubricants (mainly depends on the use of rolling bearing in the load The radial and axial) , rotational speed, temperature, and the external environment condition. For the use of railway freight car rolling bearings condition in our country, select the lubricant grease grease, and satisfy the following basic requirements: good lubrication performance, reduce the bearing friction and wear, ensure the normal service life of bearing. Good mechanical stability, when use grease by mechanical shearing action, and under the impact load of vibration, the consistency will not change obviously, the same rare loss, meet the use requirements of the train running speed. Good colloidal stability, under the condition of heat and pressure, grease to keep the stability of the colloid structure and certain points of oil. Good rust resistance, prevent bearing corrosion due to cold damp environment and bearing the condensate. Good oxidation resistance, extend the service life of grease, truck running mileage use requirements. Good high temperature performance, under the condition of high temperature, keep the bearing contact surface have certain oil film thickness. Good low temperature performance, under the condition of low temperature, does not affect the normal starting and running of railway vehicle. Good sealing rubber compatibility, use cycle, rubber size, hardness, compressive strength does not change significantly. Good water resistance, grease used in water or damp environment, there can be no obvious phenomenon of emulsion, keep good lubrication performance. Pieces do not contain harmful to the environment of the material and the influence of the bearing properties of the mechanical impurities. （ Source: the resources of railway vehicle platform)