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Squirrel Cage Elastic Support with Stiffness Gradient

An elastically supported, squirrel-cage technology, used in engine lubrication, turbine/propulsion lubrication, gas turbine installations, etc., can solve problems such as easy fracture of cage bars, achieve non-breakage, improve load bearing and bending moment capacity, The effect of facilitating marketing

Active Publication Date: 2019-07-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cross-section of the cage bar of the traditional squirrel-cage elastic support remains unchanged. At the same time, during the working process, the squirrel-cage elastic support bears the vibration load caused by the vibration of the rotor and the eccentric load caused by overload during maneuvering flight, so the cage bar is easy to break

Method used

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  • Squirrel Cage Elastic Support with Stiffness Gradient
  • Squirrel Cage Elastic Support with Stiffness Gradient
  • Squirrel Cage Elastic Support with Stiffness Gradient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Such as figure 1 As shown, a squirrel-cage elastic support with a gradient of stiffness in the present invention includes a fixed ring 1 and a cylindrical bearing mounting ring 2, and the fixed ring 1 and the cylindrical bearing mounting ring 2 are integrally formed. Several through grooves are provided on the cylinder wall of the cylindrical bearing mounting ring 2, correspondingly forming several evenly distributed cage bars with variable cross-sections. The variable-section cage includes a first cage part 301 near one end of the fixed ring 1, a second cage part 303 away from the end of the fixed ring 1, and a first cage part 301 and a second cage part 302 for connecting the transition, And it has a transitional cage part 302 with a gradually changing section. In the present invention, the cross-sectional area of ​​the first cage part 301 is larger than the cross-sectional area 303 of the second cage part, and the two sides of the transitional cage part 302 are trans...

Embodiment 2

[0020] Such as figure 2 As shown, a squirrel-cage elastic support with a gradient of stiffness in the present invention includes a fixed ring 1 and a cylindrical bearing mounting ring 2, and the fixed ring 1 and the cylindrical bearing mounting ring 2 are integrally formed. Several through grooves are provided on the cylinder wall of the cylindrical bearing mounting ring 2, correspondingly forming several evenly distributed cage bars with variable cross-sections. The variable section cage includes a first cage part 301 near the end of the fixed ring 1, a second cage part 303 away from the end of the fixed ring 1, and a transitional connection between the first cage part 301 and the second cage part 303, And it has a transitional cage part 302 with a gradually changing section. In the present invention, the cross-sectional area of ​​the first cage part 301 is greater than the cross-sectional area 303 of the second cage part, and the two sides of the transitional cage part 302...

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Abstract

The invention discloses a squirrel cage type elastic support with a rigid gradient. The squirrel cage type elastic support comprises a fixing ring and a cylindrical bearing installation ring with oneend fixedly connected with the fixing ring. Multiple through grooves are formed in the cylinder wall of the cylindrical bearing installation ring, and multiple variable-section cage bars which are evenly distributed are correspondingly formed. By means of the squirrel cage type elastic support, a second cage bar part with the smaller section area is adopted at the end away from the fixing ring, and a first cage bar part with the large section area is adopted at the end close to the fixing ring. The rigidity of the squirrel cage type elastic support is adjusted by adjusting the relative size ofthe section area of the two parts of cage bars, and therefore the critical rotating speed of a rotor system is adjusted; and meanwhile, the bearing load and the bending moment capability of the squirrel cage type elastic support are improved, the cage bars are not likely to be fractured, the fatigue strength reservation is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to a squirrel-cage elastic support in an aero-engine, in particular to a squirrel-cage elastic support with a gradient of stiffness. Background technique [0002] The rotor-support system of modern aero-engines tends to be more and more flexible. The squirrel-cage elastic support is a support structure often used in aero-engines such as turboshaft, turbojet and turbofan to adjust the critical speed and reduce the vibration of the whole machine. The cross-section of the cage bar of the traditional squirrel-cage elastic support remains unchanged. At the same time, during the working process, the squirrel-cage elastic support bears the vibration load caused by the vibration of the rotor and the eccentric load caused by overload during maneuvering flight, so the cage bar is easy to break. [0003] Therefore, urgently need to solve above-mentioned technical problem. Contents of the invention [0004] Purpose of the invention: The pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D25/28F01D25/16F02C7/20F02C7/06
CPCF01D25/16F01D25/28F02C7/06F02C7/20
Inventor 费庆国何俊增张大海刘璟泽柳友志
Owner SOUTHEAST UNIV
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