What are the most common ways of SKF bearing lubrication knowledge - bearing
There are several kinds of SKF bearing lubrication way, and each type of bearing and various types of bearings in the use of lubrication is not the same, so more conducive to SKF bearing service life to maximize, is the performance of the mechanical equipment is in a state of the highest efficiency.
1, solid lubricant used in some special conditions, adding a small amount of solid lubricant grease, such as adding 1 of 3-5% molybdenum disulphide can reduce wear and improve the compressive strength heat-resistant ability, for high temperature, high, high vacuum, corrosion resistance, resistance to radiation, and the special conditions such as extremely low temperatures, the solid lubricant in engineering plastics and powder metallurgy materials, lubricating bearing parts can be made with, such as the solid lubricant with adhesive bonding on the raceway, cage and rolling body, lubrication film formation, has certain effects on reducing the friction and wear.
2, oil lubrication, is an important characteristic of lubricating oil viscosity, viscosity directly affect the liquidity of lubricating oil and the size of the friction surface is formed between the oil film thickness, SKF bearing working temperature of lubricating oil viscosity is usually 12 -
Speed the Gao Yingxuan lower viscosity, the more load weight should choose high viscosity.
Commonly used lubricating oil has high-speed machine oil, machine oil, turbine oil, compressor oil, transformer oil, cylinder oil, etc.
Oil lubrication methods include: a.
Oil bath lubrication oil bath lubrication is the most common lubrication method, suitable for low, medium speed, bearing lubrication, bearing part of immersion in the slot, the bearing parts of lubricating oil by rotating, and then flow back to the oil level of oil tank should be slightly lower than the lowest at the center of the roller.
Oil drip lubrication oil drip lubrication is suitable for need to ration oil SKF bearing parts, drip oil every 3 - general
A drop of it is advisable to 8 seconds, too much oil will cause the bearing temperature increased.
Circulating oil lubrication oil pump in the conversion of the filter oil transfer to the bearing parts, through the bearing lubricating oil filter cooling after use.
Due to the circulating oil can take a certain quantity of heat, cooling the bearing, therefore method is suitable for high speed bearing parts.
Spray lubrication with dry compressed air after the sprayer and lubricating oil mixed form oil mist, spray bearing, can effectively make the bearing cooling airflow and can prevent the intrusion.
This method is suitable for high speed, high temperature lubrication bearing parts.
Spray lubrication with oil pump nozzle shot into the bearing, the oil in the high pressure into the bearing of the bearing at the other end into the oil in the tank.
In SKF bearing high speed rotates, rolling element and cage with high rotate speed makes the surrounding air, the air in general it is difficult to be sent to the bearing lubricating oil lubrication method, use the method of high-pressure jet spray the lubricating oil must be taken to the bearing, the position of the nozzle should be placed between inner ring and retainer center.
SKF bearing kurtosis, data collector used now is common.
But pay attention to in the practical skills.
With low vibration.
Spectrum of complex vibration signals, the scene is difficult to determine a trouble-free, back to vibration signal acquisition, precision analysis to the computer.
At this point, the conventional analysis, first check whether the bearing vibration velocity spectrum and kurtosis is close to the standard, and then use power spectrum to investigate excessive vibration energy, if the power spectrum is not big, all kinds of frequency component of the spectrum of observation.
If the corresponding frequency spectral line power frequency times, should focus on find fault in the unit structure;
For power frequency scores times, appears more small digital frequency, marketable frequency should be focused on looking for SKF bearing, if any, are bearing fault, if not, exclusion of other parts fault should be cause for alarm, strengthen monitoring.
Actually find many not overweight, vibration and bearing failure.
Once appear, bearing characteristic frequencies or close to the bearing characteristics of the frequency spectrum, should determine bearing fault, and then according to the size of amplitude, can make trend analysis or arrange maintenance.