Arrangement structure of lower central bearing and oil seal of top drive gearbox

Abstract

The invention discloses a top drive gear box lower stabilizing bearing and oil seal configuration structure. The top drive gear box lower stabilizing bearing and oil seal configuration structure comprises a top drive main shaft, a bearing neck, a lower stabilizing baring and gear oil seal and a rotating seal, wherein the lower stabilizing baring and gear oil seal is installed at the tail end of the bearing neck, the rotating seal and a rotating head are arranged in a separated mode, and the rotating seal as an independent structure is installed on the lower portion of the rotating head. According to the top drive gear box lower stabilizing bearing and oil seal configuration structure, the lower stabilizing baring and gear oil seal moves downwards and is installed at the tail end of the bearing neck, the rotating seal and a hanging ring adapter are arranged in a separated mode, and therefore the bearing stabilizing effect is improved, labor intensity of workers is relieved, maintenance time is shortened, and a drilling process is accelerated.

Description

technical field [0001] The invention relates to a lower central bearing and an oil seal configuration structure of a top drive gearbox. Background technique [0002] Such as Figure 1 to Figure 3 As shown, the distance between the upper and lower righting bearings of the top drive main shaft in the past is small, and the righting effect is not obvious. Moreover, the lower righting bearing 1 and the gear oil seal 2 are located at the upper end of the bearing neck, so it is very inconvenient to disassemble and replace. The gearbox 3 needs to be opened, and the main shaft and the bearing neck are lifted out as a whole to complete the replacement task, which is time-consuming and laborious, and increases the labor of the workers. Intensity, delay drilling time. [0003] On the other hand, the oil circuit of the traditional top drive hydraulic system is opened on the bearing neck and the lifting ring adapter, so the rotary seal 4 must be located in the swivel head, and when the ...

AI Technical Summary

Problems solved by technology

[0002] like Figure 1 to Figure 3 As shown, the distance between the upper and lower righting bearings of the top drive main shaft in the past is small, and the righting effect is not obvious

Moreover, the lower righting bearing 1 and the gear oil seal 2 are located at the upper end of the bearing neck, so it is very inconvenient to disassemble and replace. The gearbox 3 needs to be opened, and the main shaft and the bearing neck are lifted out as a whole to complete the replacement task, which is time-consuming and laborious, and increases the labor of the workers. Intensity, delayed drilling time

[0003] On the other hand, the oil circuit of the traditional top drive hydraulic system is opened on the bearing neck and the lifting ring adapter, so the rotary seal 4 must be located in the swivel head, and when the lifting ring adapter hangs the drilling tool, it will cause additional extrusion stress to the rotary seal 4 , especially when the loads of the two lifting rings are uneven and eccentric loading occurs, the wear on the rotary seal 4 is particularly serious, and the replacement of the seal ring is frequent and inconvenient. The rotary head 5 needs to be removed as a whole, which delays working hours

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