Imported bearing grease inspection method and the new application of metamorphic - bearing knowledge
To import bearings, inner ring and outer ring can be installed separately, thus simplify the installation process, especially when the inside and outside the circle must be especially interference fit.
In the inner ring has been installed in place of the axial load including outer ring of bearing box, must pay attention to see if inside and outside the circle to the right, in order to avoid scratch bearing raceway and rolling parts.
If a cylinder and needle bearing with without the inner ring or side of the flange rim flange edge of the inner ring, it is recommended to use to install the sleeve.
Outside diameter should be equal to the inner ring raceway diameter of sleeve F, machining tolerance standards shall be the d10.
Drawn cup needle roller bearing is best to use the core shaft installation.
Imported bearing lubrication in principle with the other rolling bearing lubrication, just imported bearing working condition is bad, its performance could get effective play to a great extent, depends on the situation of the lubrication of the bearing.
Imported bearing lubrication methods mainly include grease lubrication and oil lubrication.
Grease lubrication grease and seal, seal structure and lubrication equipment simple, add grease is convenient, so as long as the work conditions allow, generally adopts imported bearing grease lubrication.
Oil lubrication cooling effect is strong, and can be taken from bearing inner dirt and moisture.
Imported bearing lubrication oil lubrication methods have pressure oil lubrication, oil lubrication, oil mist lubrication and oil lubrication.
Pressure oil lubrication is normal speed import bearings under the most effective way of lubrication.
Oil lubrication is the lubricating oil at a certain pressure through in a bearing on one side of the nozzle spray into the bearing lubrication for inside, generally applied in high speed bearing imports, or pressure lubricating oil can't meet the cooling requirements of the occasion.
Spray lubrication is to contain oil mist dry compressed air into the bearing lubrication for inside, use less oil, due to the effect of air, cooling effect is extremely strong, it is mainly used for high speed and high precision of large imported bearings of rolling, or to often do not remove the imported bearing in the bearing housing.
Pressure oil lubrication and oil lubrication needs to be installed into and out of the tubing, lubrication pump, oil reservoir, sometimes need to lube oil cooler, therefore, the cost is higher, imported bearing less commonly use.
In the process of using imported bearing, grease is critical.
Use bad, grease will cause damage to the bearing.
Bearing grease test, has the following methods: 1.
Oil droplets trace method take a clean white paper, number of oil drops on the filter paper, after waiting for lubricating oil leakage, if the surface is black powder, touch resistance acerbity feeling, is the lubricant inside has many impurities, good oil powder, with the hand feels dry, smooth, and yellow.
Hand twist to lubricating oil twist between thumb and forefinger grinding repeatedly, good lubricating oil hand feel less lubricity, wear debris, no friction, if feel fingers between the larger friction feeling such as sand, suggests that the impurity, lubricating oil can no longer use, a new lubricating oil should be replaced.
Illumination method on a clear day, use a screwdriver to lubricating oil lifted, and horizontal Angle of 45 degrees.
Contrast sunshine, observe the oil situation, under the light, can see clearly without wear debris in lubricating oil is good, can continue to function, if excessive wear debris, lubricating oil should be changed.
Take oil flow observation two cups, one of which need to be checked out of the lubricating oil, empty on the desktop, the other will leave the measuring cup with lubricating oil for high 30 - desktop
40 cm and tilt, let oil flow slowly to the empty cup, to observe the flow situation, good quality lubricant oil flow should be long and thin, uniform, continuous, if appear oil flow fast and slow, and sometimes has a large flow, the said lubricating oil has deteriorated.
2 add boundary lubrication bearing: acid armour with aldehyde, has the very high wear resistance, bearing surface is arranged regularly with oil storage pit must be lubricated with grease, when assembly is particularly suited to high load under the low speed of rotation, swing movement and often under load negative, opening and closing and less prone to forming fluid lubrication parts, under the condition of boundary lubrication, can use for a long time without refueling and maintenance, and in the process of gas can be used to more prolong the service life of bearing, currently applicable to the metallurgical machinery, mining machinery, hydraulic machinery, auto parts, construction machinery, agricultural machinery, etc.
* oil-free self-lubricating bearings: this product is based on steel substrate, the middle layer sintered spherical bronze powder, surface rolling ptfe [
And the mixture made of lead.
It has a small friction coefficient, wear resistant, corrosion resistant.
Oilless self-lubrication and long service life characteristics, use it can reduce cost, reduce noise, to prevent sticking, slippery.
It is widely used in various mechanical sliding parts, such as printing presses, textile machines, hydraulic carrier, tobacco machine, medical machinery, machines and micro-motor, automobile, motorcycle, etc.
* metal Mosaic solid self-lubricating bearings, is a combined metal bearing characteristics and self-lubricating bearing characteristics of novel lubricated bearing, by load matrix, and the special formula of solid lubricating materials lubrication.
It has high bearing capacity, impact resistance, high temperature resistant, self-lubricating ability, etc.
Traditional oil bearing: because of the travel the advantages of low noise, self-lubricating, oil bearing has become the latest must-haves in the computer CPU fan bearing, the market demand is big;
In addition, as people more and more high to the requirement of noise, oil bearing application in daily household appliances are also expanding.