three-row cylindrical rollers slewing ring bearings made in china
1.Three-row cylindrical rollers slewing ring bearings
Three-row cylindrical rollers slewing ring bearings are the perfect choice for heavy duty bearings. It is also the most stable, reliable and longest life slewing bearing.
The three-row cylindrical roller combined slewing bearing bears axial load, overturning moment and radial load at the same time. Compared with the crossed cylindrical roller slewing bearing, the load of each roller is reduced.
Compared with the double row reducing ball slewing bearing, the point contact is changed to the line contact, which reduces the contact stress. The load carrying capacity is the highest bearing.
The axial load and radial load of the structure are borne by different rollers, wherein the axial load and overturning moment are borne by two sets of rollers with the axis horizontally placed, and the radial load is borne by a set of rollers placed with the axis vertically.
Different raceways and rollers bear, so under the same stress conditions, the diameter of the bearing can be greatly reduced, thus making the host more compact, and it is a slewing bearing with high bearing capacity.
This structural bearing is suitable for occasions with large axial load and overturning moment, large radial load, and low friction torque requirements. Cages are generally made of nylon isolation fast, nylon segmented cages, aluminum alloy cages segmented steel cages and brass cages according to different applications.
Application areas:
Widely used in stacker and reclaimer, overweight transport machinery, port crane, ladle turntable, shield machine and other applications.
The most commonly used structure of slewing bearings, four-point contact ball bearings, including double-row ball bearings, crossed roller bearings, including crossed tapered roller bearings, three-row cylindrical rollers slewing ring bearings, its technical characteristics? What are the technical characteristics, and what kind of bias is there in the selection of working conditions? This article focuses on the discussion.
Generally speaking, four-point contact ball bearings are resistant to permanent fatigue, crossed roller bearings are resistant to permanent deformation, and crossed tapered roller bearings have strong rigidity and high rotational accuracy. The tthree-row cylindrical rollers slewing ring bearings has the same size as the slewing bearing with high load capacity.
Based on this, the characteristics of various structural bearings in the application are obviously different.
What are the characteristics of three-row cylindrical rollers slewing ring bearings? In short, four sentences: 1. The strongest bearing capacity 2. The axial load and eccentric load capacity surpasses other structures, unique 3. The force analysis is obviously optimized 4. The master
But why choose an integral cage? Steel cages and copper cages are the most common. Force analysis and force direction, one is inclined installation, vertical installation and often bear heavy load, to ensure the rolling motion of the ball, the force distribution is even.
In this way, the life and reliability of the bearing are significantly improved after the use of the integral cage. Of course, the cost will increase by at least 30,000 to 100,000 RMB. Compared with safety and reliability, it is still quite worthwhile.
To put it bluntly, the overall cage is to ensure that the rolling elements are in place and operate smoothly and orderly, so that whether it is installed at an inclined angle or installed vertically, it can ensure quality and life.
Three-row cylindrical rollers slewing ring bearings are the ultimate form of construction for low-speed, heavy-duty slewing bearings. In order to ensure the heavy-duty life and reliability of the slewing bearing, the selection of the structural form of the cage is very important. The reference index is the demand of the working condition.
The cage of the three-row roller bearing is usually based on the main thrust roller cage and the auxiliary thrust roller cage, and the radial cage is supplemented by the design idea. There are boxed cages, segmented cages and integral cages. , the cost increases sequentially, and its stability is relatively gradually enhanced.
It should be pointed out that segmented cages and integral cages are more targeted for special working conditions. Boxed cages are only suitable for horizontal installation.
