Dynamic-pressure bearing stable in oil supply

Abstract

The invention belongs to a dynamic-pressure bearing stable in oil supply, which comprises a rotary shaft and shaft sleeves. Wedged oil cavities are formed among the rotary shaft and the shaft sleeves. The dynamic-pressure bearing is characterized in that t a center oil hole is arranged in the axial center of the rotary shaft, and perpendicular oil holes perpendicular to the axial center line of the rotary shaft are arranged on the rotary shaft, correspond to the wedged oil cavities and are communicated with the center oil hole. A rotary oil pipe is arranged at the center oil hole at one end of the rotary shaft and is mounted in a fixed oil pipe, and a sealing ring is mounted in the middle of the rotary oil pipe. Pressure oil enters the center oil hole from the fixed oil pipe through the rotary oil pipe and then flows into the oil cavities through the perpendicular oil holes. When the rotary shaft rotates, the pressure oil can be thrown to the oil cavities from the center oil hole through the perpendicular oil holes under the action of centrifugal force, accordingly, stable oil supply for the oil cavities at high speed can be guaranteed, the oil quantity of the oil cavities of the dynamic-pressure bearing is stable, and vibration of the dynamic-pressure bearing is low.

Description

technical field [0001] The invention belongs to the category of mechanical manufacturing, in particular to a dynamic pressure bearing with stable oil supply. Background technique [0002] The dynamic pressure bearing uses the hydraulic oil to be compressed in the wedge-shaped oil chamber between the rotating shaft and the bearing sleeve to generate pressure. The faster the rotating shaft rotates, the greater the pressure of the hydraulic oil, while the oil in the existing oil chamber is directly from the When the rotating shaft rotates at a high speed, the oil is easily thrown out of the oil chamber due to the centrifugal force, which will cause insufficient oil in the oil chamber and cause the bearing to vibrate. Contents of the invention [0003] The object of the present invention is to provide a dynamic pressure bearing with stable oil supply in view of the deficiencies in the prior art. [0004] Technical scheme of the present invention is as follows: [0005] A d...

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Problems solved by technology

[0002] The dynamic pressure bearing uses the hydraulic oil to be compressed in the wedge-shaped oil chamber between the rotating shaft and the bearing sleeve to generate pressure. The faster the rotating shaft rotates, the greater the pressure of the hydraulic oil, while the oil in the existing oil chamber is directly from the It enters between the rotating shaft and the bearing sleeve. When the rotating shaft rotates at high speed, the oil is easily thrown out of the oil chamber due to the centrifugal force when the rotating shaft rotates at high speed, which will cause insufficient oil in the oil chamber and cause the bearing to vibrate.

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