Crankshaft bearing lubrication system suitable for drilling mud pump and using method of system

Abstract

The invention provides a crankshaft bearing lubrication system suitable for a drilling mud pump and a using method of the system. By means of the crankshaft bearing lubrication system, all bearings ona crankshaft can be fully lubricated, and the lubrication structure is simple, efficient and convenient to install. A main bearing cover plate is arranged at the end part of the crankshaft of the crankshaft bearing lubrication system, an end cover is mounted on the main bearing cover plate, a short section is arranged at the center of the end cover, and lubricating oil enters a central through hole of the crankshaft after being accelerated and pressurized through the short section from the center position of the end cover; and the outer ring of each main bearing is provided with a corresponding oil groove and an oil hole, the inner ring of each eccentric block is provided with a corresponding oil groove and an oil hole, the inner ring of each middle main bearing is provided with a corresponding oil groove and an oil hole, and the oil holes in the eccentric blocks and the oil holes in the middle main bearings communicate with the central through hole of the crankshaft.

Description

technical field [0001] The invention relates to the field of drilling engineering in the petroleum industry, in particular to a crankshaft bearing lubrication system suitable for drilling mud pumps and a method for using the same. Background technique [0002] Mud pumps are extremely important and indispensable drilling equipment in drilling production. In the prior art, the crankshaft bearings of drilling mud pumps bear heavy loads. Once the lubrication is poor, the bearings will be damaged quickly, causing the entire mud pump to fail. At present, the mud pumps of other manufacturers in the world basically use oil pool immersion oil lubrication for the eccentric block bearing on the crankshaft. Due to the large bearing force of the eccentric block bearing and the high operating speed (145 rpm), a lot of heat is generated, and the conventional oil pool is used for oil lubrication, and the lubrication is insufficient, especially for the inner ring raceway of the bearing that ...

AI Technical Summary

Problems solved by technology

Due to the large bearing force of the eccentric block bearing and the high operating speed (145 rpm), a lot of heat is generated, and the conventional oil pool is used for oil lubrication, and the lubrication is insufficient, especially for the inner ring raceway of the bearing that is subjected to a large contact stress. Insufficient lubrication; at the same time, due to the high operating speed, the conventional oil pool immersion lubrication cannot take away more heat

Under the conditions of insufficient lubrication and heat accumulation of eccentric block bearings, the raceway of the bearing inner ring fails prematurely, and the bearings have to be replaced in advance, which brings huge economic losses to oilfield users

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