A centrifugal supplementary oil supply device and method based on micropore oil supply

Abstract

The invention discloses a centrifugal supplementary oil supply device and method based on micropore oil supply. The device is suitable for space long-life rolling bearings. The device includes: an oil reservoir; a pair of wedge-shaped delay rings, and each wedge-shaped delay ring It is arranged around the outer surface of the oil reservoir and its outer side is the outer spacer ring of the bearing assembly. There is an oil storage chamber between the two wedge-shaped delay rings. There are several oil supply micro-holes on the outer wall of the oil reservoir at the oil storage chamber, so that The oil in the oil reservoir enters the oil storage cavity from the oil supply micropore, and then is supplied to the bearing assembly through the wedge-shaped delay ring. When the oil in the oil reservoir is large, the oil is stored in the oil storage cavity, and The oil is supplied to the bearing assembly through the wedge-shaped delay ring; when the oil in the oil reservoir is low, the oil stored in the oil storage chamber supplies oil to the wedge-shaped delay ring, and then supplies oil to the bearing assembly. It adopts the micropore oil supply method to control the oil flow rate to stabilize the speed control effect. The wedge-shaped delay ring and the oil storage chamber make the supplementary oil supply rate basically consistent throughout the life cycle.

Description

technical field [0001] The invention relates to flywheels and control moment gyro products of spacecraft such as satellites, in particular to the technical field of long-term lubrication of space rolling bearings, in particular to a centrifugal supplementary oil supply device and method based on micropore oil supply. Background technique [0002] Flywheel and Control Moment Gyro (CMG) are the key execution components in the satellite attitude and orbit control system. By exchanging momentum with the satellite body, the purpose of accurately controlling the satellite attitude is achieved. The bearing assembly is the key component of the flywheel and CMG, and it is also the limit flywheel The main factors of performance indicators such as maximum speed and life. A NASA technical memorandum pointed to the problem of long-term lubrication in space as the main reason for limiting the life of the flywheel. In the vacuum and weightless space environment, the lubricating oil is eas...

AI Technical Summary

Problems solved by technology

[0004] (1) The delay ring is exposed at both axial ends of the oil reservoir. When the bearing rotates at high speed, the lubricating oil overflowing on the surface of the delay ring will randomly splash to the non-lubricating position, pollute the internal cavity, and cause the waste of lubricating oil. The effective oil supply rate is reduced, and the long-term lubrication life is reduced;

[0005] (2) The oil seepage depth of the delay ring structure design is small, and the delay effect mainly depends on the adjustment of four throttle core valves. formula), while the oil supply rate increases, the long-term lubrication life is low, and the oil supply rate is not easy to control;

[0006] (3) The structural design of the oil reservoir and the throttling core valve prevents all the lubricating oil in the oil reservoir from overflowing from the throttling core valve, especially in the low-gravity space environment, resulting in waste of lubricating oil, low utilization rate, and long-term lubrication Reduced lifespan

[0007] Based on the above analysis, it can be seen that this structural design has defects such as excessive oil supply rate and difficult control, large lubricating oil loss, low effective oil supply rate, and low long-term lubrication life.

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