Circumferential sealing rotor cooling structure and engine bearing box provided with circumferential sealing rotor cooling structure

Abstract

The invention discloses a circumferential sealing rotor cooling structure and an engine bearing box provided with the circumferential sealing rotor cooling structure. The circumferential sealing rotor cooling structure comprises an impeller, a bearing, contact type circumferential seal, a flow guide sleeve, a sealed runway and a shaft sleeve; the shaft sleeve sleeves a main shaft; the shaft sleeve is provided with a first hole; a first gap is formed in a part between the shaft sleeve and the main shaft; the impeller sleeves the main shaft; an air guide part is arranged on the impeller; a second gap is formed in a part between the impeller and the main shaft; the second gap is communicated with the first gap and the air guide part respectively; the sealed runway sleeves the shaft sleeve; the flow guide sleeve sleeves the shaft sleeve; an inner ring of the bearing sleeves the shaft sleeve; an outer ring of the bearing is matched with a bearing clamping part; a third gap is formed by matching the sealed runway, the flow guide sleeve and the bearing; the contact type circumferential seal sleeves the outer part of the sealed runway; an oil mist circulating channel is formed by the air guide part, the second gap, the first gap, the first hole, the third gap and an airflow flowing space. By adopting the circumferential sealing rotor cooling structure, the problem that lubricating oil leaks, caused by the fact that excessive oil is supplied, is solved.

Description

technical field [0001] The invention relates to the technical field of engine bearing boxes, in particular to a circumferentially sealed rotor cooling structure and an engine bearing box with the same. Background technique [0002] The prior art mostly uses spraying lubricating oil to cool the sealed runway, which has the following disadvantages: 1. Additional lubricating oil supply is required, which increases the consumption of lubricating oil and improves the oil supply and return capacity requirements of the lubricating oil system; 2. In order to Lubricating oil sprayed to the bottom of the sealed runway needs to increase the diameter of the sealed runway, which increases the weight; 3. Too much lubricating oil supply can easily cause oil leakage; 4. It is easy to cause uneven cooling and deformation of the sealed runway. [0003] In some environments where the line speed is not high, some do not use an independent oil supply cooling method, but long-term frictional heat...

AI Technical Summary

Problems solved by technology

[0002] The prior art mostly uses spraying lubricating oil to cool the sealed runway, which has the following disadvantages: 1. Additional lubricating oil supply is required, which increases the consumption of lubricating oil and improves the oil supply and return capacity requirements of the lubricating oil system; 2. In order to It is necessary to increase the diameter of the sealed runway when the lubricating oil is sprayed to the bottom of the sealed runway, which increases the weight; 3. Excessive supply of lubricating oil is likely to cause oil leakage; 4. It is easy to cause uneven cooling and deformation of the sealed runway

[0003] In some environments where the line speed is not high, some do not use an independent oil supply cooling method, but long-term frictional heating will affect the service life of the circumferential seal

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