润滑脂的热安定性 скачать в хорошем качестве

润滑脂的热安定性

Thermal stability refers to the colloidal stability and service life of grease in hot environment,mechanical equipment in high temperature working environment will accelerate the evaporation,oxidation and oil separation of grease,resulting in the destruction of grease colloidal structure and grease failure,causing mechanical failure and damage,so improving the thermal stability of grease,can effectively prolong its service life.The main factors affecting thermal stability include: basic oil, thickener and additives.Dropping point: it is an important indicator of the thermal stability of the grease.The grease changes from the flowing paste to the flowing fluid state temperature and becomes the drop point.It is usually used to predict the highest use temperature of the grease.Higher drops indicate a better thermal stability of the grease.In general,in the process of choosing grease, the temperature of its use site should be at least 15~25°C lower, so that the grease will not dilute or evaporate and drop, so that lubrication failure, resulting in abnormal wear and damage of mechanical equipment. Grease wide temperature range drop point determination method Drop termination of grease wide temperature range Method summary: Fill the grease in the fat cup, and put it into the test tube in the aluminum block furnace with a preset constant temperature.The thermometer was placed in the tube and recorded at a temperature when the first grease sample dropped from the lipid cup to the bottom of the tube, as the observation drop, exactly 1°C.At the same time, the temperature of the aluminum block furnace is recorded, take one third of the difference between the temperature of the aluminum block furnace and the thermometer temperature in the test pipe as the correction coefficient, add with the observation drop, that is, the drop point of the grease sample.Thank you for watching,see you next time.