Adjustable pad structure used in high-temperature side bearing cavity of engine

Abstract

The invention relates to an adjustable pad structure used in a high-temperature side bearing cavity of an engine, and the adjustable pad structure can be widely applied to such fields as ground-based gas turbines, aero-engines and the like. A bearing, an adjustable pad and a sealing labyrinth ring which are arranged on a turbine shaft in a sleeving manner are arranged in the high-temperature side bearing cavity of the engine, one end surface of the adjustable pad is propped against the sealing labyrinth ring, the other end surface of the adjustable pad is propped against a bearing track inner ring, and a hot-end turbine rotating part is arranged on the inner side of the sealing labyrinth ring. The adjustable pad structure is characterized in that a plurality of toothed grooves are formed at least in the end surface, propped against the bearing track inner ring, of the adjustable pad. Compared with a traditional adjustable pad, the adjustable pad structure provided by the invention has the advantages of simple structure, low processing cost and complete function, can achieve dual effects of reducing heat conduction of high-temperature parts and providing lubricating oil required by cold start of the engine, can control the temperature of the bearing inner ring more effectively and meets the demand for supplying the lubricating oil required by cold start of the engine.

Description

technical field [0001] The invention relates to an adjusting pad structure used in high temperature side bearing cavities in the fields of ground gas turbines, aeroengines and the like. Utilizing various concave tooth-shaped structures on the end surface of the adjusting pad structure, the cold start-up supply of lubricating oil in the high temperature side bearing cavity and the low temperature control of the inner raceway of the bearing can be realized. Background technique [0002] The pre-supply of cold lubricating oil in the bearing chamber of high-speed rotating bearings and the temperature control of the inner ring runway of the bearing are two engineering problems of great significance in the fields of ground gas turbines and aeroengines. [0003] In the structural design of gas turbines and aero-engines, the axial and radial clearances of rotating parts are realized by various adjustment pad structures pressed on the rotating shaft, which is a low-cost, high-efficie...

AI Technical Summary

Problems solved by technology

This high-temperature heat conduction effect will cause the temperature of the inner ring of the bearing runway to rise, deteriorating the working conditions of the bearing

At the same time, the rise in temperature will increase the difficulty of selecting the interference of the inner ring and the selection of the radial oil clearance of the bearing when the bearing is assembled in a cold state.

Therefore, how to solve the problem of high working temperature of the bearing inner ring is an important technical issue that affects the safety and life of the engine

[0004] In addition, when ground gas turbines and aero-engines are started in a cold state on the ground, the bearing cavity is often in a state of "dry oil pool". The pre-supply of lubricating oil in the starting state is also a prominent and difficult technical problem

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