A vertical high-speed roller cone bit bearing screw seal test device

Abstract

The invention discloses a vertical high-speed roller cone bit bearing spiral sealing test device, which comprises an upper fixed plate, a liquid cylinder, a cone, a helical bushing, a shaft and a lower fixed plate, the helical bushing is threadedly connected with the cone, and the cone Both the screw sleeve and the screw sleeve are set on the outer diameter of the shaft. The inner surface of the screw sleeve is provided with a sealing thread. There is a gap between the sealing thread and the shaft. A sealed first cavity is formed between the cone and the shaft. The first through hole, the first through hole communicates with the first cavity, the cone, the screw sleeve, and the shaft are all arranged inside the liquid cylinder, and the upper fixing plate and the lower fixing plate are respectively connected with the upper and lower ends of the liquid cylinder A second cavity is formed, and the second cavity communicates with the first cavity. The test device of the present invention simulates the spiral seal structure of the roller cone bit bearing. The cone drives the spiral bushing to rotate. The sand discharge performance of the spiral seal is tested by measuring the discharge time of the sand-containing medium, which provides a guarantee for the smooth production and application of the spiral seal product.

Description

technical field [0001] The invention relates to the field of roller cone bits, in particular to a vertical high-speed roller cone bit bearing spiral seal test device. Background technique [0002] The roller cone bit is the most important rock-breaking tool in drilling engineering. It plays a leading role in rock breaking at the bottom of the well. Its working performance directly affects the drilling quality, drilling efficiency and drilling cost. The service life of the roller cone bit is almost directly Depends on the life of the drill bearing, and the life of the bearing depends to a large extent on the life of the seal. The current development trend of the roller cone bit is to achieve high speed. With the continuous increase of the bit speed, the weakness of the sealing of ordinary bearings working in harsh environments will become more and more prominent. Therefore, while studying the drill bit, the research and improvement of the bearing life must not be ignored. T...

AI Technical Summary

Problems solved by technology

At present, the test device for the helical sealing of high-speed roller cone bits has not yet been involved. Experimental research is the premise guarantee for the smooth progress of field tests and product applications, and the test device is the key to determining the success of the test research. The development of the sealing test device is of great significance to improve the life of the drill bit

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