Cylindrical roller bearing raceway contact line. Load capacity, mainly bear radial load. The rolling body and the ring wall friction is small, and suitable for a high speed rotation. Can be divided according to the ferrule or without ribs, NU, NJ, NUP, N, NF, single row cylindrical roller bearings, and NNU, NN double-row cylindrical roller bearings. The
bearing inner ring, outer ring detachable structure.
Inner or outer wall of the cylindrical roller bearings, the inner and outer rings can move relative to the axial, so can be used as free-end bearings use. Double-wall, in one side of the inner and outer rings of the other side of a single wall of the cylindrical roller bearings, a direction that can withstand a certain degree of axial load. General steel stamping cage, or copper alloy machined solid cage. But there are also a part of the use of polyamide forming holder.
Cylindrical roller bearings are
separable bearings, installation and removal is very convenient. Cylindrical roller bearings can withstand greater radial load and suitable for use cited in the high-speed operation occasions.
Such bearings allows the inner ring axis and the outer ring axis error angle (inclination) is small, only 2 'to 4'. Therefore, the relatively high precision machining of shaft and bearing Otherwise, it is easy to raceway contact area appear uneven load or stress concentration. But the pair of rollers or roller contact busbar correction can reduce the occurrence of stress concentration.
Cylindrical roller bearings depending on the number of columns equipped with rolling element can be divided into single row, double row and multi-row cylindrical roller bearings and other structures. The different structure bearing is also reflected in the location of the design of the wall. One of the commonly used cylindrical roller bearings have the following forms. Single row cylindrical roller bearing is separable bearing, easy installation and removal of the two rings can be a tight fit, correction roller and the line of contact between the raceway can reduce the stress concentration. Double row cylindrical roller bearings are
swimming bearing separability very easy installation and removal. The two rings are a tight fit. Double row cylindrical roller bearings almost not allowed to have a tilt angle.
In normal use, the vibration of the bearing damage is quite sensitive, flaking, creasing, corrosion, cracks, wear, etc. will be reflected in the bearing vibration measurement. So, through the use of special bearing vibration measurements (frequency analyzer) can measure the size of the vibration frequency can not infer the specific circumstances of unusual. After the measured values due to the conditions of use of the bearing or sensor mounting position, etc. different in advance of each machine measured values were analyzed and compared to determine the criterion.
