Tapered hybrid bearing assembly part with textured shaft neck surface

Abstract

The invention relates to a tapered hybrid bearing assembly part with a textured shaft neck surface. The tapered hybrid bearing assembly part comprises a bearing and a shaft neck, wherein the bearing comprises housings and bearing pads; oil inlet channels are arranged on the housings; an oil cavity and an oil sealing surface are arranged on the inner surface of each bearing pad; a small-hole restrictor is arranged between each oil inlet channel and the corresponding oil cavity; inner holes of each bearing pad are tapered holes; the shaft neck is of a tapered structure matched with the bearing pads; a surface texture is arranged on the shaft neck surface; the surface texture is one or more of a bump, a pit and a groove; the bump, the pit or the groove is distributed in the surface, matched with the oil sealing surface of each bearing pad, of the shaft neck in the bus direction of the tapered shaft neck; and a lubricating medium enters the oil cavities after being restricted through the small-hole restrictors, flows through the oil sealing surfaces and is discharged from the end surface of the bearing, wherein the lubricating medium is pressure water or low-viscosity pressure oil. The tapered hybrid bearing assembly part with the textured shaft neck surface can improve bearing capacity of the bearing while reducing the high-speed temperature rise of the bearing, and increasing the limited working rotation speed.

Description

technical field [0001] The invention relates to a tapered dynamic and static pressure bearing assembly with shaft diameter surface textured, belonging to the field of fluid dynamic and static pressure lubricating bearings. Background technique [0002] Tapered dynamic and static pressure bearings can bear radial and axial loads at the same time, have a compact structure, and the bearing clearance can be adjusted during work, and are widely used in high-speed and precision spindles. However, with the further increase of the rotational speed, due to the high viscosity of the traditional lubricating oil, the heat generated at high speed is high, which restricts the improvement of the limit rotational speed of the bearing. [0003] Due to the low viscosity and good damping characteristics of water and low-viscosity lubricating oil, the heat generation of the bearing is small and the temperature rise is low at high speed, and it is suitable for high-speed bearings. However, its ...

AI Technical Summary

Problems solved by technology

However, when the structural size of the bearing is limited, for a bearing with a small diameter, reducing the gap will make the liquid film gap too small, resulting in difficulty in assembly; when the hydraulic pressure is too large, it will easily cause problems such as sealing difficulties and material deformation.

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