Three-stage eccentric double ring gear crankshaft for mud pump

Abstract

The invention discloses a three-stage eccentric double-gear-ring crankshaft of a slurry pump. The three-stage eccentric double-gear-ring crankshaft comprises a crankshaft body, wherein three transition shafts which are connected with one another sequentially are arranged between shaft heads of the crankshaft, and axes of the three transition shafts are staggered at 120 degrees; an eccentric boss is arranged in the middle of each transition shaft, an eccentric distance between the central axis of the transition shaft and the central axes of the shaft heads is e1, and an eccentric distance between the central axis of the transition shaft and the central axis of the eccentric boss is e2; an eccentric wheel is mounted on the outer side of each eccentric boss, and an eccentric distance between the central axis of the eccentric wheel and the central axis of the eccentric boss is e3; a gear boss is arranged between every two adjacent transition shafts, and the axes of the gear bosses coincide with the axes of the shaft heads. The diameter of each eccentric wheel is reduced, the central position of the slurry pump is lowered, the overall size of the slurry pump is reduced, with adoption of a leftward rotating gear and a rightward rotating gear which are separated, stress and transmission of the crankshaft are more reasonable and balanced, and the processing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of oil drilling mud pump equipment, in particular to a three-stage eccentric double ring gear crankshaft of a mud pump. Background technique [0002] The traditional mud pump crankshaft can be divided into two categories: integral and split. In order to meet the stroke requirements, the eccentric wheel of the crankshaft of the mud pump is basically coaxial, directly through the transition of the inclined shoulder or assembled once separately, and offset to the required eccentric distance. Traditional mud pumps mostly use cast crankshafts. The diameter of the eccentric wheel of the cast crankshaft is large, and the center position of the mud pump needs to be raised. The overall volume of the final equipment is relatively large, which makes transportation and installation difficult. The traditional crankshaft uses a herringbone ring gear, which is more expensive. Its arrangement is "crank-crank-herringbone ri...

AI Technical Summary

Problems solved by technology

Traditional mud pumps mostly use cast crankshafts. The diameter of the eccentric wheel of the cast crankshaft is large, and the center position of the mud pump needs to be raised. The overall volume of the final equipment is relatively large, resulting in difficulties in transportation and installation.

The traditional crankshaft uses a herringbone ring gear, which is more expensive. Its arrangement is "crank-crank-herringbone ring gear-crank". This arrangement makes the force on the crankshaft not uniform enough, and it is easy to produce Vibration, affecting the reliability of equipment operation

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