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Mouse cage elastic support bearing cavity structure

A technology of elastic support and bearing cavity, which is applied in the direction of jet propulsion devices, engine components, rocket engine devices, etc., can solve the problems that cannot meet the use requirements of combined power engines, and achieve the goal of improving engine efficiency, compact structure size, and ensuring normal operation Effect

Active Publication Date: 2019-07-12
XIAN AEROSPACE PROPULSION INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing bearing cavity structure cannot meet the requirements of the combined power engine, the present invention provides a squirrel cage elastic support bearing cavity structure, which establishes a lubricating oil flow path in the bearing cavity to realize cooling and lubrication of the bearing

Method used

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Embodiment Construction

[0034] The invention discloses a squirrel cage elastic support bearing cavity structure, which is a brand-new scheme for the structural design of the combined power engine bearing cavity. A squirrel cage elastic support bearing cavity structure provided by the present invention combines Figure 1-2 , including a housing 1, an oil inlet pipe 2 arranged on the housing 1, a turn-back type squirrel cage elastic support 3 arranged in the housing, a contact end face seal assembly 4, a grate tooth for lubricating oil seal 5, a graphite ring 6, and a bearing 7, snap ring 8, O-shaped rubber sealing ring 9 and rotating shaft etc.

[0035] The housing 1 is provided with an annular groove composed of an inner ring and an outer ring, and the inner ring is provided with a plurality of small holes evenly distributed around the circumference, combined with Figure 4 , the small holes are evenly distributed along the circumference of the end face; the foldback type squirrel cage elastic suppo...

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Abstract

The invention relates to a mouse cage elastic support bearing cavity structure. The mouse cage elastic support bearing cavity structure comprises a shell provided with an oil inlet pipe, and a returntype mouse cage elastic support, a contact type end face sealing device, sliding oil seal grate teeth, a graphite ring, a bearing, a clamping ring, a rotating shaft and the like that are arranged in the shell; the return type mouse cage elastic support is installed in a ring groove of the shell, and the inner ring of the shell is provided with a plurality of small holes uniformly distributed in the circumference; and the contact end face sealing device is hermetically arranged at one end of the bearing cavity structure. In the working state, high-pressure lubricating oil enters the bearing cavity through the oil inlet pipe arranged on the shell, the contact-type end face sealing device and the bearing are sequentially cooled according to a preset flow path, and the cooled lubricating oil is discharged out of the bearing cavity through the small holes arranged in the inner ring of the shell, the bearing cavity is filled with lubricating oil under the throttling effect of the small holes, positive pressure of 0.6-0.7 MPa is formed, and therefore, the pressure condition of normal working of the contact type end face seal is met, the external high-temperature gas is isolated, and the normal working of the bearing cavity is ensured.

Description

technical field [0001] The invention relates to a squirrel cage elastic support bearing cavity structure, which can be applied to liquid rocket engines and air-breathing combined power engines. Background technique [0002] In an air-breathing combined power engine, it is usually necessary to set up a turbine for air boosting to suck in air and pressurize it to provide combustion air for the engine. The turbine is mainly composed of a compressor, a turbine, and a rotating shaft. The compressor, turbine, and rotating shaft rotate at high speed. Therefore, a corresponding supporting structure needs to be installed in the turbine to realize the support of the rotating shaft and the cooling and lubrication of the bearing seal. [0003] The air-breathing combined power engine is mainly formed by the combination of aero-engine, ramjet engine and rocket engine. The turbine technology of the combined power engine is mainly derived from the aero-engine, and is further developed and i...

Claims

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Application Information

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IPC IPC(8): F02K9/60F01D25/16F01D25/18
CPCF01D25/16F01D25/18F02K9/60
Inventor 朱东华许开富严俊峰张鹏飞贾少锋齐琛王文廷
Owner XIAN AEROSPACE PROPULSION INST
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