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The Main Structure and Matching of Single Row Cylindrical Roller Bearings

wallpapers Tech 2020-06-09
Single-row tapered roller bearings are mainly used to bear radial and axial combined loads mainly radial load, is a very common type of bearing. Many people are not very clear about single-row tapered roller bearings, nor do they know what structure it is, how to match, etc. Next, the editor will explain the relevant knowledge of single-row cylindrical roller bearings.
 
Brief introduction of single row cylindrical roller bearing
Single-row cylindrical roller bearings are usually only subjected to radial forces. Compared with ball bearings of the same size, the radial load capacity is increased by 1.5-3 times. The rigidity is good and the impact resistance. It is particularly suitable for rigid bearings and short shafts. Axial displacement of the shaft caused by heat and installation and disassembly of the machine accessories requiring separate bearings. Mainly used for large motors, machine tool spindles, engine front and rear support shafts, train and passenger car box shaft supports, diesel engine crankshafts, automobile tractor gearboxes, etc.
 
Main structure of single row cylindrical roller bearing
This kind of bearing can bear radial load and axial load in one direction of back ground. The bearing cannot be used alone. Under the radial load, additional axial force will be generated. It is often necessary to balance it with a bearing that can withstand the axial force in the opposite direction, that is, the two sets of bearings are used in pairs. High-speed clearance during installation and use can also achieve preloading. The ability of single-row tapered roller bearings to withstand axial loads depends on the contact angle. The greater the contact angle, the greater the axial load carrying capacity. This type of bearing limits the axial displacement of one side of the shaft or housing, and does not allow the shaft to tilt relative to the housing hole.
 
Characteristics of single row tapered roller bearings
1. The roller and the raceway are in line contact or underline contact. The radial bearing capacity is large, which is 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 of the shaft and the casing caused by thermal expansion or installation error, and can be used as a free end support.
4. The processing requirements of the shaft or the seat hole are relatively high. 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 or outer ring can be separated for easy installation and disassembly.
Cylindrical rollers are in line contact with the raceway and have a large radial load capacity. It is not only suitable for bearing heavy load and impact load, but also suitable for high-speed rotation.
 
Cylindrical roller bearing raceways and rolling elements are geometrically shaped. After the improved design, it has higher bearing capacity. The new structural design of the rib and the roller end surface not only improves the axial bearing capacity of the bearing, but also improves the lubrication conditions of the contact area between the roller end surface and the rib and improves Bearing performance.



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