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Self-adapting mixed gas radial journal bearing using integral silk net damper

A technology of mixing gas and journal bearings, used in shafts and bearings, bearings, mechanical equipment, etc.

Inactive Publication Date: 2010-06-23
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, while the benefits of introducing air bearings into aircraft are well understood, significant technical challenges must be overcome to develop a practical design

Method used

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  • Self-adapting mixed gas radial journal bearing using integral silk net damper
  • Self-adapting mixed gas radial journal bearing using integral silk net damper
  • Self-adapting mixed gas radial journal bearing using integral silk net damper

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Embodiment Construction

[0053] Referring to the drawings, wherein like reference numerals represent like elements throughout the various views, Figure 1-5 An adaptive mixed gas journal bearing is shown generally at reference numeral 10 in accordance with one embodiment of the present invention. The bearing 10 includes a plurality of adaptive hybrid bearing pads 12 . Each bearing pad 12 includes a pad surface 14 adjacent a rotating rotor or shaft 16 that rotates generally in the direction of arrow 18 . In one embodiment, bearing pads 12 comprise tilt pads (tilt pads) with biased integral springs ( figure 2 ). Each bearing pad 12 also includes an axial groove 20 which serves to reduce the weight of the bearing pad 12 . The pad surface 14 of each bearing pad 12 also includes a hydrostatic recess 22 having a depth 24 and a width 26 ( Figure 5 ). For example, the hydrostatic recess 22 may have a depth of 2 to 10 times the thickness of the gas film between the bearing surface 14 and the rotor surfa...

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PUM

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Abstract

The present invention relates to a self-adapting mixed gas radial journal bearing using an integral silk net damper. The self-adapting mixed gas radial journal bearing (10) comprises a self-adapting mixed bearing pad (12) with a fluid static force convex part (22) and a capillary throttleer (28) for providing pressurized gas flow to the self-adapting mixed gas radial journal bearing (10).The self-adapting mixed gas radial journal bearing (10) also comprises an inner ring (32), an outer ring (34) and a damper bridge (36).Each side of the damper bridge (36) forms a damper cavity (42).the integral silk net damper (62) is located in the damper cavity (42).Integral pair middle springs (46,48) are between the inner ring and the outer ring (32,34) to conveniently provide radial and turning self adaption to the self-adapting mixed bearing pad (12).A bearing design without oil solves the properties of low dumping and low loading ability in the existing self-adapting air chaff bearing design, and meanwhile, the self adaption for the geometry changes of rotors is reserved.

Description

technical field [0001] The present invention relates generally to bearings and, in particular, to compliant gas bearings using integral wire mesh dampers. Background technique [0002] High-speed equipment, such as aeroengine turbomachinery, and aeroderivative applications, such as steam turbines, gas turbines, and compressors, must traverse several natural frequencies, or critical speeds, before reaching design operating speeds. When the system is operating at its natural frequency or critical speed, the system / rotor vibration amplitude becomes large. These vibrations originating from rotor imbalance can be destructive or even catastrophic if they are not sufficiently damped. Bearings with sufficient damping properties will limit or dampen synchronous vibrations to allow equipment to pass through critical speeds safely. In addition, good bearing damping contributes to rotor dynamic stability at high speeds by suppressing the subsynchronous excitation of the rotor natural ...

Claims

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Application Information

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IPC IPC(8): F16C32/06
Inventor B·H·埃塔斯
Owner GENERAL ELECTRIC CO
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