Micro-miniature turbine engine shaft sleeve

Abstract

The invention relates to the technical field of manufacturing of micro-miniature turbine engines, in particular to a micro-miniature turbine engine shaft sleeve. The shaft sleeve is characterized by comprising a shaft sleeve shell installed on a shaft through bearings, the front end of the shaft sleeve shell is connected to a diffuser, a front carbon ring is arranged on the position, on the exteriors of the front end bearings of the shaft sleeve shell, of the shaft, and the front carbon ring is installed on a sleeve of the shaft through a front baffle and a front carbon ring outer sleeve; andthe rear end of the shaft sleeve shell is connected to a turbine guider, a rear carbon ring is arranged on the position, on the exterior of the rear end bearings of the shaft sleeve shell, of the shaft, the rear carbon ring is installed on the shaft through a rear baffle and a rear carbon ring outer sleeve, and fuel nozzles and an oil inlet are further formed in the shaft sleeve shell. According to the micro-miniature turbine engine shaft sleeve, a mechanical sealing shaft sleeve design method is adopted, so that a bearing part is cooled and lubricated to the maximum degree, the requirement ofthe engine on the bearings is reduced, the service life of the bearings is prolonged, and maintenance cost of the engine is reduced; and the novel fuel nozzles are adopted, the design of a complex oil way of a fuel and lubricating oil system is simplified, and replaceability of the nozzles is improved.

Description

technical field [0001] The invention relates to the technical field of micro turbine engine manufacturing, in particular to a micro turbine engine shaft sleeve. Background technique [0002] With the opening of domestic low-altitude areas in recent years, various types of aircraft have developed rapidly, and at the same time, engines as the power source of aircraft have also been fully developed. At present, consumer-grade aircraft mainly use battery-driven motors as power sources, while industrial-grade aircraft, large-scale aircraft models, general aviation / unmanned aerial vehicles, etc. mainly use micro-turbine engines as power devices, mainly including micro-turbojet engines and micro-miniature turbofan engines And micro-turbine engines such as micro-turboprop engines. The shaft sleeve is one of the main components of the micro-turbine engine. It mainly works in a severe working condition of high temperature and high pressure. At the same time, the bearing components in...

AI Technical Summary

Problems solved by technology

The traditional micro turbine engine lubricating oil system only uses a small part of the fuel-lubricating oil mixture to cool and lubricate the bearing parts through the bushing. During the start-up and cooling process, it is easy to cause insufficient cooling of the bearing parts, resulting in overheating damage or even carbonization of the bearing. Seriously affects the service life of the engine, and also increases the maintenance cost of the micro turbine engine

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