SKF bearings lubrication function

Writer: Eric Bearing Limited

  Lubrication for rolling bearing and the fatigue life of friction, wear, temperature, vibration, etc., and not have an important effect on the normal lubrication, bearing can't work. Analysis shows that the cause of damage bearing around 40% of the bearing damage and bad lubrication relevant. Therefore, the good lubricating bearing is to reduce the friction and wear bearing the effective measures. In addition, bearing the lubrication and cooling, rust and sealing, moderate impact, etc DuoZhong role, bearing the role of lubrication can explain briefly the following lubrication for rolling bearing and the fatigue life of friction, wear, temperature, vibration, etc., and not have an important effect on the normal lubrication, bearing can't work. Analysis shows that the cause of damage bearing around 40% of the bearing damage and bad lubrication relevant. Therefore, the good lubricating bearing is to reduce the friction and wear bearing the effective measures. In addition, bearing the lubrication and cooling, rust and sealing, moderate impact, etc DuoZhong role, bearing the role of lubrication can explain briefly as follows: -
  A. touch each other in the two rolling surface or between sliding surfaces form a layer of oil film the two surface is separated, reducing the contact surface of the friction and wear.  

 B. by oil lubrication, especially the circulation oil lubrication, oil mist lubrication and spray oil lubrication, lubricating oil can take away most of the internal friction bearings hot, an effective cooling effect.
  C. Adopt grease lubrication, can prevent external dust and foreign body in bearing, have closed role.
  D. lubricants have prevent metal corrosion function.
  E. extend bearing fatigue life. 3, - grease lubrication
  Grease is by the base oil, thickener and additives of lubricant. When when the choice, should choose is very suitable for bearing conditions of use of the trademark, because oil embellish is different, the performance will also have very big difference, so in a choice, must pay attention to. Bearing grease of commonly used a calcium and manufactured, sodium, calcium grease sodium grease, lithium and manufactured, aluminum grease and mos2 grease, etc. Bearing grease filling in the number of internal space, to fill the bearing of the 1/3 to 1/2-for appropriate. High speed shall be reduced to a third. Too much grease will make higher temperature. 4, SKF bearing grease in the choice of -
  According to the working temperature, the main index selection grease should be dropping points, oxidation stability and low temperature performance, drop point can be used for evaluating the performance of high temperature commonly, bearing the practical work should be below the temperature drop point 10-20 ℃. The use of synthetic grease temperature drop point should be less than 20 to 30 ℃. SKF bearings grease according to choose when to be elected, heavy load needle into the degree of small grease. Work under high pressure except the degrees outside the small needle, but higher oil film strength and extreme pressure properties. -
  According to the environment condition selecting greases, calcium and manufactured not easily soluble in water, and is suitable for drying and moisture less environment. 5, oil lubrication -
  In high speed, high temperature conditions, has not timely grease lubrication oil lubrication can be used. Through the cycle of lubricating oil, can take away a lot of heat. Viscosity is an important characteristic of lubricant viscosity, the size of the influence of the lubricating oil directly liquidity and formed between the friction surface of the oil film thickness, bearing operating temperature lubricant viscosity is generally 12-15 CST. The speed GaoYingXuan low viscosity, the heavy load of high viscosity be elected. Commonly used lubricating oil have JiXieYou, high speed JiXieYou, turbine oil, compression oil, transformer oil, cylinder oil etc. -

  SKF bearings oil lubrication methods include the -

A. oil bath lubrication -

Oil bath lubrication is the most common lubrication method, suitable for low, medium speed bearings lubrication, bearing part of submerged in a tank, lubricating oil by by rotating bearing parts with a, then flows back to the oil should be slightly lower than the minimum oil level of the center of the roller. -

B. drops of oil lubrication -

Drops of oil lubrication is suitable for the need to supply quantitative lubricating oil to bearing parts, drop the amount of oil general every 3-8 seconds a advisable, too much oil amount will cause bearing temperature increased. -

C. circulation oil lubrication -

Be filtered with oil pump oil conveying to bearing parts, through the bearing of the lubricating oil filter again after cooling after use. Due to circulation oil can take away a certain quantity of heat, make bearing, reason this law is applicable to cooling speed higher bearing parts. -

D. spray - lubrication

The compressed air with dry by spray and lubricating oil mix formation oil mist, bearing, air jet can effectively make bearing cooling and prevent impurities invasion. This method is suitable for high speed, high temperature bearing parts lubrication. -

E. injection - lubrication

With oil pump will be high pressure oil through the nozzle to shoot, into the bearings bearing oil from bearing the other end into the oil. In bearing high speed rotating, rolling body and keep frame also with very high rotation speed air flow, formed around with general lubrication method to it, then oil bearing with high pressure injection method must be spray to bearing of oil will be, should be put in the position of the nozzle inner ring and keep frame between center. 6, SKF bearing solid - lubrication

In some special use conditions, a solid lubricant grease to join in, such as join 3 ~ 5% of the no. 1 mos2 can reduce wear, improve the compressive heat-resisting ability, for high temperature, elegant, high vacuum, corrosion resistance, resistance to radiation, and extremely low temperature, and other special conditions, the solid lubricant to join engineering plastic or metallurgical powder material, can be made with self-lubrication performance bearing parts, if use adhesive bonding rolling lubricant in solid way, keep frame and rolling body, form lubrication film to reduce the friction and wear, have certain effect. 7, SKF bearings lubricant of complement and replace -

A. the time interval - grease added

  Due to mechanical function, aging and the increase of pollution, bearing in the configuration of the lubrication base will gradually lose their lubrication performance. Therefore, the need to constantly supplement and lubrication rank update. The time interval of lubricant supplement for the formation of the bearing, size and rotary speed and different, figure 4-1 shows running time according to need to replenish the general time interval between grease. -

In addition, when bearing temperature over 70 ℃, bearing temperature rise 15 ℃ each, be about to use the added time interval between grease cut in half. -