Cylindrical rollers and raceways are linear contact bearings. Load capacity, mainly bear radial load. The friction between the rolling element and the retaining edge of the ring is small, which is suitable for high-speed rotation. According to whether the ring has ribs, it can be divided into single row cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double row cylindrical roller bearings such as NNU and NN. The bearing has a separable inner ring and outer ring structure.
Cylindrical roller bearings with no ribs on the inner ring or outer ring, the inner ring and outer ring can move relative to the axial direction, so it can be used as a free end bearing. Cylindrical roller bearings with double ribs on one side of the inner ring and outer ring and a single rib on the other side of the ring can bear a certain degree of axial load in one direction. Generally, stamping steel cages or solid cages made of copper alloy cars are used. But there is also a part of the use of polyamide forming cage.
The rollers of the
Cylindrical Roller Bearing are in line contact with the raceway, and the radial load capacity is large. It is not only suitable for bearing heavy loads and impact loads, but also suitable for high-speed rotation. At the same time, it improves the lubrication conditions of the contact area between the roller end face and the rib, and improves the performance of the bearing. Bearing people's WeChat is very worthy of attention! Generally suitable for large and medium-sized motors, locomotives, machine tool spindles, internal combustion engines, generators, gas turbines, reduction gear boxes, rolling mills, vibrating screens, and lifting and transporting machinery.
Bearing characteristics
1. The roller and the raceway are in line contact or repaired offline contact, with large radial bearing capacity, suitable for bearing heavy loads and impact loads.
2. The friction coefficient is small, suitable for high speed, and the limit speed is close to the
Deep Groove Ball Bearing.
3. The N type and NU type can move axially, can adapt to the change of the relative position between the shaft and the housing caused by thermal expansion or installation error, and can be used as a free end support.
4. The processing requirements for the shaft or the seat hole are high, and the relative deflection of the outer ring axis after the bearing is installed must be strictly controlled to avoid contact stress concentration.
5. The inner ring or outer ring can be separated for easy installation and disassembly.
product features
The cylindrical roller is in line contact with the raceway, and the radial load capacity is large. It is not only suitable for bearing heavy load and impact load, but also suitable for high-speed rotation.
The raceways and rolling elements of cylindrical roller bearings are geometrically shaped. After improved design, it has a higher load carrying capacity. The new structural design of ribs and roller end faces not only improves the axial load carrying capacity of the bearing, but also improves the lubrication conditions of the contact area between the roller end face and the rib. The performance of the bearing.
Accuracy class
Cylindrical roller bearings can be divided into PO, P6, P5, P4, P2 according to the accuracy grade. The accuracy grades are sorted from low to high.
Construction form
1. N0000 type cylindrical roller bearings without ribs on the outer ring and NU0000 type cylindrical roller bearings without ribs on the inner ring. This type of bearing can accept large radial loads, have a high limit speed, and does not restrict the axial displacement of the shaft or housing, and cannot accept the shaft. To load.
2. NJ0000 and NF0000 cylindrical roller bearings with ribs on the inner and outer rings can restrain the axial displacement of the shaft or housing in one direction, and can accept small unidirectional axial loads. NU0000+HJ0000, NJ0000+HJ0000, NUP0000 type bearings can restrain the axial displacement of the shaft or housing in the axial clearance area of the imported bearing. And can accept small two-way axial load.
Bearing material
The materials used in the manufacture of bearing components have a great influence on the performance and reliability of rolling bearings. General considerations for bearing rings and rolling elements include: hardness related to load carrying capacity, fatigue resistance under rolling contact and lubrication conditions under different cleanliness, and dimensional stability. For the cage, friction, strain and inertial force should be considered, and in some cases, chemical interaction with certain lubricants, solvents, coolants and refrigerants should also be considered. The relative importance of these considerations is also affected by other operating parameters, such as corrosion, high temperature, shock load, or a combination of these factors.
The contact seal ring embedded in the rolling bearing also has a significant impact on the performance and reliability of the bearing. The materials used in its manufacture must have excellent resistance to oxidation, heat or chemical corrosion.
