Ball bearing and oil bearing

Ball bearing and oil bearing


Ball bearing changed the bearing friction, rolling friction is adopted, the more effectively reduces the friction phenomenon between the bearing surface, sealed angular contact ball bearing effectively enhance the service life of the fan bearing, and therefore will prolong the service life of the radiator.

The disadvantage is that the process is more complex, resulting in higher cost, but also bring higher working noise.

Oil bearing sleeve bearing is to use sliding sleeve bearings, using oil as a lubricant and drag reduction agent, angular contact thrust ball bearing the initial use of operation low noise, low manufacture cost, but the bearing wear serious, life is ball bearing has a big gap.

Special combination bearings of machine turntable

Turntable bearing CNC machine tools and machining centers as an important component parts, its performance directly affects the positioning accuracy and machining accuracy of the workpiece, the bearing structure of complex, high-tech and difficult process, ZYS an earlier successful development of such high-precision bearings products in the domestic manufacturers.

Turntable bearing has two types, one is thrust / radial bearings that single row cylindrical roller bearings and thrust cylindrical roller bearing. The other is a two-way angular contact thrust ball bearing . Currently, sealed angular contact ball bearing the turntable bearing rotary table machine, indexing plate, etc. are basically used axial / radial bearings.

Why two way thrust angular contact ball bearing can't bear radial load?

By the two axis ring, a seat ring, a sleeve, surface profile measurement ,two sets of roller and cage assembly. The thickness of the grinding sleeve can adjust the preload of the bearing.

The nominal contact angle of the bearing is 60 degree, which can bear the large axial load, and the axial rigidity is high.

The nominal diameter of the contact ball bearing and the outside diameter of the double row cylindrical roller bearing are same, sealed angular contact ball bearing but the deviation is small, so the fit of the hole of the box is in a certain gap. Therefore, the two-way thrust angular contact ball bearing can not bear radial load.

Bearing history

Bearing history：
In the seventeenth century, the British design and manufacturing ball bearings C. Vallo, and installed in the car to try and British postal P. Wirth made ball bearings patent. Eighteenth century German publication on ball bearings HR Hertz contact stress papers. On the basis of the achievements of the Hertz, Germany, Sweden, Glenn A. Pam, who have done a lot of testing, the design theory and the development of fatigue life of rolling bearings is calculated to make a contribution. Subsequently, the Russian Petrov NP Newton's law to calculate the viscous friction bearings. British Thor O. Renault were found mathematical analysis, Reynolds equation is derived, from the foundation hydrodynamic lubrication theory. The early form of linear motion bearings, is placed in a row in a row of wooden sled. This technique might be traced back to the time of the construction of the Great Pyramid of Giza, although there is no clear evidence. Modern linear motion bearings using the same kind of works, but sometimes with the ball instead of rollers. The first sliding and rolling element bearings are made of wood. Ceramic, sapphire or glass are also used, steel, copper, other metals, plastics  have been widely used. From the heavy-duty vehicle axle and spindle to precision watch parts, many occasions require rotating bearings. The easiest is rotating bearing sleeve turbocharger bearings, it's just a clip in the bush between the wheels and axles. This design is then Rolling alternative is to use a lot of cylindrical roller bushings replace the original, each rolling element as a single wheel. Rolling with the earliest practical input cage is clockmaker John Harrison in 1760 for the production of H3 timing meter invention. Aboard a Roman ship found in the Italian lake nm, found examples of early ball bearings. The wooden ball bearings are used to support rotating desktop. The ship was built in 40 BC. It is said that Leonardo da Vinci around 1500 had been to a ball bearing is described. Ball bearings of various immature factors, there is a very important point is that a collision will occur between the ball, causing additional friction. But you can put the ball into a small cage to prevent this phenomenon. 17th century, Galileo "fixed ball" or "caged ball" ball bearing did the earliest descriptions. But then for a long time, install the sealed angular contact ball bearing has not been achieved on the machine. The first patent on ball channel is Carmarthen Philip Vaughan in 1794 obtained. In 1883, Friedrich Fischer proposed the use of appropriate production grinding machine of the same size, roundness accurate idea of the ball. This laid the foundation for the creation of an independent industrial bearings.

 

Tune concentric with the bearing dimension series varies

Tune concentric with the bearing dimension series varies , generally allow aligning angle is 1 to 2.5 degrees , the larger the load bearing capacity of this type , in addition to radial sealed angular contact ball bearing load bearing can withstand the effects of a two-way axial load , has good impact resistance , in general, low self-aligning roller bearings operating speed allowed .

 City is China's largest spherical roller production bases , one son , now a production capacity of 1.5 million Bearing life testing machine sets of the above , the production range :21304 ,22205 -22,264 -21,320 -22,364 ,22308 ,23120 ,23022 -23,064 -23,264 -23,164 ,23218 ,24022 -24,064 -24,164 ,24128 , cage has CA, MB, MA, CC,  five kinds ; straight holes and the inner cone (K) two kinds ; outer ring ( Tanker ), ( with stopper groove ) two; there are various clearance standards to meet customer needs ; tolerance levels are two kinds.

    After years of development and accumulation , the company is strong in technology , product quality and excellence, by domestic and foreign customers in the domestic market , covering over 30 provinces, municipalities and autonomous regions , as power machinery , mining machinery, textile machinery, engineering machinery and automobile industries, providing supporting services.

    Extend its high-tech products with a long inner spherical roller bearings, spherical roller thrust bearings, spherical roller bearings seals , vibrating screen bearings ; while the company also manufactures bearings, rolling mill bearings, cylindrical roller bearings, taper roller Bearings .