Full-size textured drill sliding bearing experimental device and test method

Abstract

The invention discloses a full-size textured drill sliding bearing experimental device. The experimental device includes a computer, a data acquisition card and a rack, a variable frequency motor, a rotating speed sensor, a coupling, a torque sensor, a main shaft box, a shaft sleeve clamp, a lubricating grease collecting box, a radial loading mechanism, a hydraulic cylinder and an oil pump, a force sensor is arranged on the radial loading mechanism, a rotating shaft of the main shaft box is connected with a sliding bearing sample and is provided with a tightening nut, a lubricating grease supply device is arranged on the main shaft box, and a heating ring and a platinum resistor temperature sensor are arranged on the shaft sleeve clamp. The invention also discloses a full-size textured drill sliding bearing experimental measurement method. The full-size textured drill sliding bearing experimental device and experimental measurement method have the beneficial effect that influence of surface texture on frictional wear of the sliding bearing under different working conditions can be easily and rapidly analyzed, thereby obtaining optimal surface texture of the sliding bearing under the corresponding different working conditions, and increasing the service life of the sliding bearing.

Description

technical field [0001] The invention relates to the field of downhole tool tribology, in particular to a full-scale textured sliding bearing experimental device and a testing method. Background technique [0002] As the main rock-breaking tool, the working performance of the roller cone bit has become a key factor affecting the drilling quality and efficiency, while the sliding bearing is used as a bridge for the transmission of torque and motion of the roller cone bit, and its service life is the weak link of the use of the roller cone bit , Improving the tribological properties of the bearing has also become the key to improving the working performance of the roller cone bit. The sliding bearing of the roller cone bit is mainly in the lubrication state from boundary lubrication to compound lubrication in the working environment, so the failure mode of the sliding bearing of the roller cone bit is mainly adhesive wear. In view of the special structure and working environme...

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Problems solved by technology

In view of the special structure and working environment of the roller cone bit, it is very difficult to improve its structure on the basis of the original drill bit sliding bearing to increase the service life of the roller cone bit sliding bearing

[0003] The study found that the surface texture has the effect of lubricating and reducing wear, but the mechanism of the impact on the sliding bearing of the drill bit is not clear at present, so it is necessary to study the effect of surface texture and its geometric parameters on the drill bit through similar experiments. The impact of friction properties of sliding bearings, and then find the surface texture parameters with better lubrication and friction reduction effects under working conditions

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