Heavy card to use new type of cone drum roller bearing

Heavy card to use new type of cone drum roller bearings 2020 - 06 - 18 of the guide roller bearing types include: roller roller, tapered roller, needle roller, spherical roller. Roller bearings of high bearing capacity, make its application is very extensive, roller design, processing and also in constant development. In may this year schaeffler roller set a new standard for modification, schaeffler's all with X-ray Quality of life of 500 mm and above aperture 241 series spherical roller bearing will adopt a new rolling body ( The new modification end of bucket roller) 。 The following will introduce a new type of cone drum roller bearing. Automobile gearbox with tapered roller bearings, can solve the problem of the layout of the bearing, but the ring high guard friction easily lead to wear and tear. Roller geometry also can produce normal force on the inner ring guard, resulting in contact area caused by sliding wear. Roller and guard, between roller and raceway contact force and the contact area between roller rim as shown in the figure below. Under the same overall dimensions and store fat size using double row deep groove ball bearing as an alternative, the wear and tear will be much smaller, but was lower than those of tapered roller bearings, the bearing capacity can satisfy the general vehicle axle gear box use. For heavy trucks, the rated load is not enough, must be improved. German industrial research at the university of kaiserslautern showed that diameter of 70 mm and no special surface precision ( The surface roughness Ra value is 0. 15μ m） Bucket of cone roller bearing the basis of the prototype even if not optimal, but its wear resistance has been with the same main dimensions, the optimal penal geometry shape and high quality surface precision ( The surface roughness Ra value is 0. 03μ m） Tapered roller bearings. Design and development of the basic structure of the conical barrel roller bearing as shown in the figure below. Contact points P1 and P4 respectively refers to the internal and external roll on two points. Internal and external roll on the contact point between two tangent intersection in the symmetric axis line M point, resulting in a cone Angle & alpha; 。 On the surface of the roller outer contour can be used for a period of constant radius R the circular said. At this point, set up a vital role, not only can keep the roller spacing, roller by keeping on to correct rollers skew. Cone drum roller bearing relative to the advantage of tapered roller bearing is: since there is no guard, avoids the contact force in axial regions, it is the principal causes of wear and tear ( The working principle of tapered roller bearings) ； There will be no spin movement, Compared with the double row ball bearing) ； Due to the use of self lock retainers, only a small lead force; Is not sensitive to tilt; High bearing capacity of the joint load ( Double row ball bearing can't meet this feature) 。 New bearing geometric structure is a combination of tapered roller bearing, The axial and radial joint under the load of high bearing capacity) And the barrel roller bearings ( No exposure to guard, high tolerance for roller tilt and skewed sex) Advantage, therefore can be overloaded applications instead of bearing. Note the structure bearing design and development of the concept in 32208 as an object has been underway for dynamics simulation and analysis, it remains to be further optimized model, and the manufacture and testing of the sample. The author: DE] M。 Marmol等《商用车技术》( Source: the journal bearing)