Rolling bearing, bearing cavity assembly, gas turbine, oil drain device, method for manufacturing rolling bearing

Abstract

The invention relates to a rolling bearing, a bearing cavity assembly, a gas turbine, an oil draining device, a manufacturing method of the rolling bearing and an oil draining method. The rolling bearing includes an inner ring, an outer ring, rolling elements and a cage, and an oil drain device arranged outside the axial side end of the cage of the rolling bearing, and the oil drain device includes an inner ring, an outer ring, and an annular spacer , wherein, the annular spacer forms a first oil leakage chamber with the outer ring and the inner wall of the outer ring; the annular spacer forms a first oil leakage chamber with the inner ring and the outer wall of the inner ring Second drain chamber. The rolling bearing, the bearing cavity assembly, the gas turbine, the oil draining device, the manufacturing method of the rolling bearing, and the oil draining method have the advantages of good lubricating performance, safety and reliability.

Description

technical field [0001] The invention relates to a rolling bearing, a bearing cavity assembly, a gas turbine, an oil draining device, a manufacturing method of the rolling bearing and an oil draining method. Background technique [0002] The bearing cavity is an important part of the lubrication system of the aero-engine, which is related to the performance and life of the aero-engine. With the continuous development of aero-engines in the direction of high performance, low fuel consumption, and long life, the heat load of the engine hot-end bearings is also increasing, and the requirements for bearing performance are also increasing; on the one hand, lubricating oil is required to take away a large amount of heat , to achieve the purpose of cooling the bearing; on the other hand, when the bearing is running in the bearing cavity, the lubricating oil film is splashed and sprayed from both sides of the bearing after passing through the high-speed rotating bearing. Among them,...

AI Technical Summary

Problems solved by technology

[0005] 1. The rolling bearing lacks a device that can control the speed and direction of the liquid droplets flying out from the side end of the bearing, so it is easy to cause some droplets with high kinetic energy to splash on the wall of the bearing cavity, and eventually cause the lubricating oil inside the bearing cavity to catch fire;

[0006] 2. The rolling bearing adopts the main ring lubrication method. Most of the droplets reach the wall of the outer ring due to the centrifugal force, and then are discharged from both sides of the outer ring of the bearing, resulting in insufficient lubrication and heat dissipation of the inner ring;

[0007] 3. Due to the high-speed oil stirring of the bearing, the liquid droplets are ejected irregularly and disorderly from both sides of the bearing. At the same time, the internal oil film distribution of the bearing is not uniform when the bearing is in dynamic operation, which leads to excessive heat in some parts of the bearing.

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