Aero-engine main shaft bearing assembly capable of improving lean oil resistance

Abstract

The invention discloses an aero-engine main shaft bearing assembly capable of improving lean oil resistance, belongs to the field of aero-engine bearings, and aims to solve the problems that the oil supply pressure is reduced, the oil supply effect is reduced, and lubrication and heat dissipation of a bearing are not facilitated due to the fact that an existing lubricating oil collector sprays oil to a gap between a bearing retainer and an inner ring through a right-angle oil way so that abnormal wear of bearings due to lean oil is generated. According to the aero-engine main shaft bearing assembly capable of improving the lean oil resistance, right-angle oil ways in collectors on the two sides of a bearing are improved into vertical oil ways, lubricating oil enters the lubricating oil collectors after being thrown out of a low-pressure shaft through a centrifugal force, and the lubricating oil is thrown outwards through a vertical oil path of the lubricating oil collector so that the attenuation of the pressure of the lubricating oil is reduced. And the effective width of the inner diameter of the retainer is increased, and meanwhile, an oil receiving step is added. Lubricating oil is thrown into an oil collecting structure of the retainer from the outer diameter of the lubricating oil collector, the lubricating oil flows into the bearing in an under-ring lubricating mode, and the lubricating and heat dissipation effects are improved.

Description

technical field [0001] The invention belongs to the field of aero-engine bearings, and in particular relates to an aero-engine main shaft bearing assembly which improves the anti-lean oil capability. Background technique [0002] The engine intermediate fulcrum bearing is a cylindrical roller bearing, and its lubrication method is end surface oil spray lubrication. After the lubricating oil is sprayed from the oil pump, it is sprayed into the gap between the bearing cage and the inner ring through the right-angle oil passage of the lubricating oil receiver. The right-angled corner of the oil collector reduces the oil supply pressure, which reduces the oil supply effect to a certain extent. The inner and outer rings of the bearing rotate in the same direction, and the revolution speed of the cage and rollers is relatively high (about 11750rpm). The high-speed rotating cage and rollers make the surrounding air form airflow resistance, and it is extremely difficult for low-pres...

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Problems solved by technology

[0003] In order to solve the problem that the existing lubricating oil collector adopts a right-angle oil path to spray into the gap between the bearing cage and the inner ring, the oil supply pressure is reduced, the oil supply effect is reduced, and the cage rotates at a high speed when the bearing is working. And the rollers make the surrounding air form airflow resistance, and it is extremely difficult for low-pressure lubricating oil to enter the inside of the bearing, which is not conducive to the lubrication and heat dissipation of the bearing, and may easily lead to abnormal wear of the bearing due to poor oil, thereby providing an improved anti-lean oil Capable aero-engine main shaft bearing assemblies;

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