The turntable bearing block is a large and extra large bearing block that can accept comprehensive loads and has a special structure. It has the characteristics of compact structure, sensitive rotation, and convenient device maintenance. Compared with ordinary bearing housings, turntable bearing housings have the following obvious features:
1. Dimensions
The diameter is usually 0.4cm ~ 10m, and the maximum can reach 40m.
2. High carrying capacity
Generally it can accept axial load, radial load and overturning moment load together.
3.Low speed
The task speed is lower than 10r / min, and in a few cases, it does not perform successive rotations, but only rotates within a certain angle to perform a swing motion.
4.With bearing block device hole
It can be fastened on the upper and lower supports with screws.
5. No pivot
The inner or outer ring has a gear for rotary drive.
6. With smooth oil holes and sealed installation.
The important construction methods of the turntable bearing seat are identified as: four-point contact ball turntable bearing seat, double-row angular contact thrust ball turntable bearing seat, cylindrical roller turntable bearing seat, tapered roller turntable bearing seat, and three rows of cylindrical roller Turntable bearing seat.
According to whether the tooth can be distributed with gears and gears, it can be divided into: toothless type, external tooth type or internal tooth type.
Among them, the four-point contact ball turntable bearing seat has a high static load capacity, the cylindrical roller turntable bearing seat has a high dynamic load capacity, and the tapered roller turntable bearing seat can be preloaded to improve the support rigidity and rotation accuracy. The three-row cylindrical rollers combined with the turntable bearing seat increase the bearing seat height to improve the bearing capacity. The load identification has different raceways to accept, so the bearing seat diameter can be greatly reduced under the same load condition, so the host More compact, it is a turntable bearing seat with high load capacity.
The turntable bearing seat is commonly used in large-scale rotary installations such as lifting and transportation machinery, mining machinery, construction machinery, port machinery, marine equipment, and high-precision radar.