The choice of the railway freight car rolling bearing lubricants

The choice of the railway freight car rolling bearing lubricants - 2018 12 - 11 ( Railway vehicle resource platform) The choice of bearing lubricant depends largely on using the load bearing ( 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: bring about good lubrication performance, reduce the bearing friction and wear, ensure the normal service life of bearing. Bring about 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. Bring about good colloidal stability, under the condition of heat and pressure, grease to keep the stability of the colloid structure and certain points of oil. Bring about good rust resistance, prevent bearing corrosion due to cold damp environment and bearing the condensate. Bring about good oxidation resistance, extend the service life of grease, truck running mileage use requirements. Bring about good high temperature performance, under the condition of high temperature, keep the bearing contact surface have certain oil film thickness. Bring about good low temperature performance, under the condition of low temperature, does not affect the normal starting and running of railway vehicle. Bring about good sealing rubber compatibility, use cycle, rubber size, hardness, compressive strength does not change significantly. Bring good water resistance, and grease in water or damp environment use, cannot have obvious phenomenon of emulsion, keep good lubrication performance. Bring does not contain harmful to the environment of material and the influence of the bearing properties of the mechanical impurities.