Two-gear gear speed reducing box used for top driving well drilling device

Abstract

The invention provides a two-gear gear speed reducing box used for a top driving well drilling device. The two-gear gear speed reducing box comprises a box body and mechanisms arranged in the box body, wherein each input mechanism comprises an input shaft and a grade-I low-speed gear driving gear and a grade-I high-speed gear driving gear which sleeve the periphery of the input shaft; each middle transmission mechanism comprises a middle shaft, and a grade-I low-speed gear driven gear, a grade-I high-speed gear driven gear and a grade-II driving gear which sleeve the middle shaft; an output mechanism comprises an output shaft and a grade-II driven gear which sleeves the output shaft; each speed changing mechanism comprises a sliding sleeve sleeving the input shaft; the sliding sleeves are mounted among the peripheries of the input shafts, and the inner walls of central holes of the grade-I low-speed gear driving gears and the grade-I high-speed gear driving gears respectively, slide along the input shafts, are matched with the inner walls of the central holes of the grade-I low-speed gear driving gears and the grade-I high-speed gear driving gears, and drive the grade-I low-speed gear driven gear pair and the grade-I high-speed gear driven gear pair to rotate. Compared with the prior art, the rotary speed output range can be improved by more than 2-3 times.

Description

technical field [0001] The invention relates to the technical field of transmission devices used in top drive drilling of oil drilling rigs, in particular to a two-speed gear reduction box. Background technique [0002] Conventional top drive drilling devices all use a first-gear gear reducer, a driving gear with a smaller diameter is placed on the motor shaft, and a driven gear with a larger diameter installed on the intermediate shaft forms a first-stage reduction gear pair. The gear with a smaller diameter located at the lower part of the intermediate shaft is a second-stage driving gear, and forms a second-stage reduction gear pair with the large gear installed on the output shaft. Through two-stage deceleration, the output speed range is 0~220r / min. When the output speed is within the range of 0~110r / min, the output torque is the rated torque and does not change with the change of the output speed; when the output speed is very low, it can obtain twice the rated torque...

AI Technical Summary

Problems solved by technology

Its output speed ranges from 0 to 220r / min, which cannot meet the needs of rapid drilling with PDC technology

At the same time, in order to ensure the output torque and external dimensions of the motor, the speed of the motor cannot be increased much, and it cannot meet the needs of rapid drilling with PDC technology.

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