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Rotor piezoelectric damping elastic support device

A technology of elastic support and piezoresistance, which is applied to the support elements of blades, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., to simplify design and implementation, reduce processing requirements, and be easy to implement.

Active Publication Date: 2018-12-18
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no rotor elastic support structure with piezoelectric branch damping technology has been found in published literature so far.

Method used

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  • Rotor piezoelectric damping elastic support device
  • Rotor piezoelectric damping elastic support device
  • Rotor piezoelectric damping elastic support device

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Experimental program
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Effect test

Embodiment Construction

[0050] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0051] The invention is a novel piezoresistance damping elastic support device used for vibration reduction of the rotor of a rotary machine. The main body is a squirrel-cage elastic support part on which piezoelectric materials, connecting circuits and circuit impedance are arranged.

[0052] Specific as image 3 As shown, it includes a squirrel-cage elastic support component and a piezoelectric component; the piezoelectric component is pasted on the squirrel-cage elastic support component by structural adhesive; the whole device is fixed on the rotating mechanical equipment through a fixed end.

[0053] The squirrel-cage elastic supporting part has several squirrel-cage bars (the number is an even number) with identical geometric dimensions, and the size and number of the squirrel-cage bars are determined by the design stiffness; one end of the squi...

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Abstract

The invention discloses a rotor piezoelectric damping elastic support device, and belongs to the technical field of rotor damping. The device comprises a mouse cage type elastic support part and a piezoelectric module; the piezoelectric module is fixed on the mouse cage type elastic support part; and the mouse cage type elastic support part is provided with multiple even mouse cage bars with the same geometric sizes. The piezoelectric module comprises distributive piezoelectric chips, circuit resistors and connecting circuits; and the piezoelectric chips are arranged on the outer sides of allthe mouse cage bars, and are placed on root parts connected with fastening flanges and on root parts connected with bearings. Outer side electrodes of the piezoelectric chips are connected into the circuit resistors; the circuit resistors comprise three types of a resistance type, an inductance-resistance type and a negative capacitance-resistance type; the circuit resistors and the piezoelectricchips are connected through the connecting circuits; and connecting modes comprise a branched circuit mode or a network circuit mode. The device reduces the machining demands of installation of outerrings on the bearings, simplifies the design of support structures, and provides the design margin for actual engineering design.

Description

technical field [0001] The invention belongs to the technical field of rotor vibration reduction, and in particular relates to a piezoelectric damping elastic support device for a rotor. Background technique [0002] Vibration problem is an unavoidable common problem in the design, manufacture and use of modern high-speed rotating machinery; especially the flexible rotor whose working speed is close to or greater than the critical speed, the change of its speed every time it starts or stops must pass through the critical speed; in order to reduce To minimize the vibration when it passes the critical point, it is the most effective method to use elastic support with damper. [0003] The role of the elastic support is to reduce the critical speed to the required value, so that the rotor can work in a wider speed range. Among the many elastic support structures, the squirrel cage elastic support is the most commonly used one, such as figure 1 shown. If the squeeze oil film d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/10F01D25/28F01D25/16H02N2/18
CPCF01D5/10F01D25/16F01D25/28H02N2/181H02N2/186
Inventor 李琳范雨连杨
Owner BEIHANG UNIV
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