What about the engine bearing

2019 - those things about the engine bearing 09 - 08 mf engineering training center of the bearing is a kind of important modern machinery and equipment parts and components, widely used in aircraft engine connection movement parts, rolling bearing is to support the rotating body and load transfer indispensable element. This issue is about bearing supporting function, first to see the structure of the bearing. Outer ring is installed in the bearing hole, generally do not turn. On the inner ring in a journal, along with the axis of rotation. The core of the rolling element bearing components. Cage to separate rolling body evenly to avoid friction. Rolling bearing inner ring and outer ring, rolling body, and a cage. According to the shape of the roller is divided into ball bearing and rolling bearing. Left: ball bearing; Right: rolling bearing rod bearing solution generally according to the length and weight of the engine and load distribution, decided to bearing the number and the corresponding supporting scheme. In 737 ng engine, for example, a total of 5 support high and low pressure rotor bearing. Among them, 1, 2 low supporting the front of the finale, 5 at the back of the axis bearing support is low, no. 3 high supporting the front of the finale, 4 at the back of the axis bearing support. NG aircraft engine bearing work mainly has two forms: 1, the outer ring is fixed, the inner ring with the axis of rotation, no. 1, 2, 3, and 5 bearings are such cases. Below is the no. 1 bearing here. 2, the outer ring is fixed on the high finale, inner ring fixed on the low finale of inside and outside the circle different rotational speed. Such as bearing 4 here. Through the above two kinds of different forms, the discretion of the engine to get support before and after the finale, at the same time guarantee the high and low free rotation axis under different rotational speed. This package to muffle the engine gear everyone not unfamiliar, what effect does it have? Unlock the engine shield hidden. Due to the particularity of no. 4 bearing, when the car engine, low cooling slow axis, axis high cooling faster, no. 4 bearing will be hold. If the plane at this time in the field in the wind, the low pressure rotor is rotating, high due to the hold of no. 4 bearing axis can be driven, without oil lubrication, may be the cause of bearing damage. At this point, the engine shield will come in handy! The answer to prevent ground idling engine. The quality of the main bearing and performance directly affect the engine performance, life and reliability. Due to long-term high temperature stress under the condition of complex running at high speed, bearing requires constant lubricating oil lubrication and vibration monitoring. Through the lubricating oil system of debris monitoring and vibration value, bearing damage, can be found in advance to avoid bearing failure caused greater failure.