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Axial force pre-loading structure of deep groove ball bearing in engine rotor fulcrum

A deep groove ball bearing and axial force technology, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of low-pressure shaft flying, blade breakage, etc., and achieve the effect of huge application potential and large technology expansion.

Active Publication Date: 2019-01-29
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In addition, the fan located at the inlet section of the turbofan engine may break the blades under extreme conditions, and at this time, the low-pressure shaft will appear to fly

Method used

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  • Axial force pre-loading structure of deep groove ball bearing in engine rotor fulcrum
  • Axial force pre-loading structure of deep groove ball bearing in engine rotor fulcrum

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the examples, the following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0018] Such as figure 1 , 2 As shown, this embodiment is a design scheme of an axial preloading structure for a deep groove ball bearing at the fan end fulcrum of a certain twin-shaft aviation turbofan engine. In the figure, 1: intake cone; 2: screw retaining ring for nut; 3: tighten nut; 4: intake cone rotating ring; 5: fan rotor; 6: fan casing; 7: spiral retaining ring; 8: grating gear ring; 9: oil retaining ring; 10: elastic ring; 11: bearing seat; 12: deep groove ball bearing; 13: oil collecting ring; 14: oil supply pipe; 15: bearing seat; 16: thrust deep groove ball Bearing; 17: flared self-locking nut assembly; 18: bearing stop ring; 19: oil supply nozzle; 20: low pressure shaft; 21: O-shaped rubber ring. In this embodiment, in orde...

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Abstract

The invention relates to an axial force pre-loading structure of a deep groove ball bearing in an engine rotor fulcrum. An engine is a gas turbine or a turbojet engine, the inner ring of the deep groove ball bearing is fixedly arranged on an engine rotor shaft in a sleeved mode and is arranged close to a rotor impeller disc in the axial direction, the outer ring of the deep groove ball bearing isfixedly supported in a bearing block, a closed oil collecting ring structure is additionally arranged on the outer ring of the deep groove ball bearing, a proper axial force load is formed on the annular end face of the oil collecting ring by utilizing the high-pressure lubricating oil, the oil supply pressure of the lubricating oil and the annular action area of the oil collecting ring are utilized, a proper axial pre-tightening load can be provided for the outer ring of the bearing, and the traditional bearing pre-tightening force structure is simplified. The axial force pre-loading structure has important engineering application significance in the field of ground gas turbines or aero-engines.

Description

technical field [0001] The invention belongs to the field of structural design of gas turbines and aeroengines, and relates to an axial force preloading structure of a deep groove ball bearing in a fulcrum of an engine rotor. Background technique [0002] The structural design of multi-ball bearings with axial force applied to small gas turbines and aeroengines is an engineering problem of great practical significance in the fields of gas turbines and aeroengines. [0003] In the structural design of gas turbines and aero-engines, in order to improve their performance stability, the ability to maintain the tip clearance of rotor blades is extremely important. It is urgent for structural designers to adopt a safe rotor fulcrum layout method and coordinate with the thermal deformation of the casing. How to improve the axial / radial gap maintenance ability of the rotor and stator in the transition state is a realistic requirement that affects the further improvement of the relia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/66
CPCF16C33/6637
Inventor 杜强刘军柳光王沛徐庆宗高金海刘红蕊冯引利蒋文婷廉曾妍杨晓洁
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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