Super-huge type tapered roller bearing without an expandable and contractible basket-shaped cage

Abstract

The invention discloses a super-huge type tapered roller bearing without an expandable and contractible basket-shaped cage. The super-huge type tapered roller bearing comprises an outer ring, an innerring, a rolling body and a cage, the rolling body and the cage are positioned at the positions between the outer ring and the inner ring, the cage formed by turning and milling is of a tapered structure in appearance, multiple pockets evenly distributed around the center of the cage are formed in the circumferential direction of the cage, the inner walls of the two sides in the length direction of each pocket are of a conical structure on the cross section, and the minimum distance of the conical structures on the cross section is smaller than the diameter of the rolling body. The super-hugetype tapered roller bearing has the advantages that the design structure is simple, the use is convenient, the existing cage which is formed by punching and is expanded firstly and then contracted isreplaced by the non-deformable cage which is formed by turning and milling, so that the rolling body has higher mounting precision in the cage, and high-precision and long-service-life operation of the super-large tapered roller bearing is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of wind power bearing design, and in particular relates to an extra-large tapered roller bearing with a self-locking basket-type cage. Background technique [0002] A wind turbine is a power device that converts wind energy into mechanical work, which drives the rotor to rotate, and finally outputs alternating current. Wind turbines are generally composed of components such as wind rotors, generators, steering devices, towers, speed limiting safety mechanisms, and energy storage devices. Its working principle is relatively simple. The wind wheel rotates under the action of wind force, which converts the kinetic energy of the wind into the mechanical energy of the wind wheel shaft, and the generator rotates to generate electricity under the drive of the wind wheel shaft. Due to the large structural size of the wind power generator, the performance of the wind power bearing plays an important role in the norm...

AI Technical Summary

Problems solved by technology

[0003] At present, the general small and medium-sized tapered roller bearing cage is a basket-shaped cage, which is formed by stamping a steel plate. After forming, the roller window hole is punched, and then the cage is expanded and the rolling elements are loaded into the window hole to form a cage. Frame and roller assembly, and then put the inner ring into the cage assembly to form a cage, roller and inner ring assembly, and then put this assembly into a special mold to shrink the cage beam to make the cage Restore the original shape and lock the rollers; the production and installation methods of this cage are suitable for some small and medium-sized tapered roller bearings, but for some extra large tapered roller slewing bearings, especially tapered rollers with a diameter of more than 2m For sub-slewing bearings, there are limitations in the production and installation of the cage. First, due to the stamped and formed cage, when the rolling elements are assembled, the pockets of the cage need to be expanded, and the rolling elements are installed between the inner and outer rings. At the same time, the expanded cage should also be shrunk to complete the entire assembly. The purpose of the cage expanding first and then shrinking is to realize the locking of the rolling elements, but during the shrinking process, there will be problems of uneven shrinkage of the cage. Its dimensional accuracy cannot meet the needs of extra-large slewing bearings, which will easily lead to a reduction in the service life of the bearing. Second, due to the excessive size of the cage, there is no suitable punching machine and mold for processing the cage, and the production is difficult. Therefore, the current tapered roller slewing bearing with a stamped and formed cage has unsatisfactory performance, and the movement clearance of the rolling elements in the cage cannot be accurately limited, which reduces the service life of the slewing bearing

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