Back-to-back-arranged tapered roller bearing axial pretightening device of large cantilever rotating retractable roof

Abstract

The invention relates to a back-to-back-arranged tapered roller bearing axial pretightening device of a large cantilever rotating retractable roof. The back-to-back-arranged tapered roller bearing axial pretightening device comprises a bearing seat, pre-fixing pieces, tapered roller bearings and tight-pressing rings. The tapered roller bearings are mounted in the bearing seat in a back-to-back mode, the pre-fixing pieces are mounted on the two sides of the bearing seat and are annular, and the bulged tight-pressing rings are arranged on the sides, closely attached to the bearing seat, of the pre-fixing pieces. The back-to-back-arranged tapered roller bearing axial pretightening device is characterized in that sleeve-shaped micro-motion partition sleeves are arranged on the outer sides of the pre-fixing pieces; outer fixing sleeves are arranged on the outer sides of the micro-motion partition sleeves; and between the micro-motion partition sleeves and the outer fixing sleeves, annular oil pressure devices are mounted in the outer fixing sleeves and comprise hydraulic cavities and telescopic pressing rings. The telescopic pressing rings of the annular oil pressure devices can be telescopic, between the annular oil pressure devices and the tapered roller bearings, the arranged micro-motion partition sleeves jack the inner circles of the tapered roller bearings, moving of the micro-motion partition sleeves is controlled through control over the annular oil pressure devices, thus the tapered roller bearings are axially pre-tightened, and the pretightening degree can be controlled by controlling the extension lengths of the telescopic pressing rings, so that good applicability is achieved.

Description

technical field [0001] The invention relates to a back-to-back arranged tapered roller bearing axial pretightening device for a large cantilever rotary opening and closing roof, belonging to the field of opening and closing roof devices. Background technique [0002] Bearing pre-tightening means that a certain method is used to generate a certain axial compression force in the bearing during installation to eliminate the clearance in the bearing and produce a certain deformation at the contact point between the inner and outer rings of the tapered roller. After pre-tightening When the bearing is subjected to working load, the radial and axial deformation of the inner and outer rings is much smaller than that without preload, so it can ensure accurate transmission and can withstand a certain load. At the same time, the bearing preload can improve the bearing rigidity and ensure the rotation accuracy when the shaft moves. In the large cantilever rotating roof, the cantilever ...

AI Technical Summary

Problems solved by technology

In the large cantilever rotating roof, the cantilever rotates around its central axis, and the cantilever will shake under the influence of external force during the movement process, which will bring impact to the central rotating shaft. If there is a gap between the bearing parts of the central rotating shaft, it will cause During the use of the rotating shaft, Jin Ruyi was damaged, which affected the normal operation of the cantilever

The size of the bearing preload has a major impact on the running quality of the support shaft. If the preload is small, it is easier to start and has less friction, but the rotation accuracy is not high; if the preload is increased, the bearing can be effectively improved. Excellent rotation accuracy and load carrying capacity, but the bearing is difficult to start, with high friction and low efficiency

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