Elevator and rotary drilling rig

Abstract

The invention relates to the field of engineering machines, in particular to an elevator and a rotary drilling rig. The elevator comprises an upper connecting body, a middle connecting body and a lower connecting body. The lower connecting body comprises a shaft part, the middle connecting body is provided with an installing cavity, the shaft part is arranged in the installing cavity, and the upper connecting body and the middle connecting body are connected. The shaft part is sleeved with a thrust self-aligning roller bearing and an angle contact bearing, the angle contact bearing is locatedbetween the thrust self-aligning roller bearing and the upper connecting body, the end, close to the angle contact bearing, of the shaft part is further sleeved with a limiting piece, and the limitingpiece abuts against the side, away from the thrust self-aligning roller bearing, of the angle contact bearing and is used for limiting the axial displacement of the angle contact bearing. According to the elevator and the rotary drilling rig, the cost can be reduced, and assembling is easy.

Description

Technical field [0001] The invention relates to the field of engineering machinery, and in particular to a lifter and a rotary drilling rig. Background technique [0002] The lifter is an important component of the rotary drilling rig. It is an excessive device connecting the drill rod and the steel wire rope. It can ensure that the steel wire rope will not twist during the rotary drilling process. The lifter provided by the related technology includes an upper body, a middle body, a lower body and an angular contact bearing. The upper connecting body is hinged with the steel wire rope through the pin shaft, and the lower connecting body is hinged with the drill rod through the pin shaft. The internal structure of the lifter provided by the related technology is mostly used in combination with angular contact bearings. The greater the lifting force of the main hoist, the greater the load of the lifter. The larger or larger the angular contact bearing selected during design More...

AI Technical Summary

Problems solved by technology

The lifting force of the main winch of the ultra-large rotary drilling rigs in the market can reach 80 tons, but the diameter of the hoist is limited by the minimum inner diameter of the drill pipe when the hoist is designed. The diameter of the hoist must be smaller than the minimum inner diameter of the drill pipe to follow Go down to 100 meters underground space with steel wire rope and drill pipe

In the range where the outer diameter cannot continue to expand, the load requirements can only be met by stacking angular contact bearings continuously, but the more stacked, the higher the cost, and it makes the assembly of the lifter difficult

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