Experimental testing device and method for vibration contact characteristics of blade damper system of gas turbine

A technology for gas turbine blades and contact characteristics is applied in the field of experimental testing devices for vibration contact characteristics of gas turbine blade damper systems, which can solve problems such as insufficient information on friction damping characteristics, incomplete understanding of actual dynamics, etc., and improve accuracy. and reliability effects

Active Publication Date: 2021-12-03
XI AN JIAOTONG UNIV
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Problems solved by technology

[0003] Currently, there are several contact models in the literature that can be used to simulate the contact between the friction damper and the blade root platform; however, the actual dynamics of the blade damper are not fully unde

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  • Experimental testing device and method for vibration contact characteristics of blade damper system of gas turbine
  • Experimental testing device and method for vibration contact characteristics of blade damper system of gas turbine
  • Experimental testing device and method for vibration contact characteristics of blade damper system of gas turbine

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Embodiment Construction

[0064] In order to make the purpose, technical effects and technical solutions of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments It is a part of the embodiment of the present invention. Based on the disclosed embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall all fall within the protection scope of the present invention.

[0065] On the one hand, most of the existing experiments use ordinary carbon steel and aluminum alloy materials, but do not use real blades and research on their alloy materials, resulting in unreliable test results; on the other hand, the existing experiments only focus on their respective working conditions Measurement studie...

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Abstract

The invention discloses an experimental testing device and method for the vibration contact characteristics of a blade damper system of a gas turbine. The device comprises an installation support; a fixed nipper in which a wheel flange is detachably mounted, wherein the fixed nipper is provided with a load applying device, piezoelectric force sensors are fixedly installed on the installation support, each piezoelectric force sensor is connected with a simulation piece clamp through a signal separator, and a blade root simulation piece is fixedly installed on the simulation piece clamp; a friction damper; a centrifugal force loading device; a laser vibration meter; an excitation probe which is used for applying step sinusoidal signals in different frequency ranges to the gas turbine blades; an electromagnetic vibration exciter; an eddy current displacement sensor which is used for measuring a vibration response signal; a multi-channel data acquisition system; a signal generator and a power amplifier. According to the invention, the accuracy and reliability of the gas turbine blade damper system vibration contact characteristic experiment test can be improved.

Description

technical field [0001] The invention belongs to the technical field of metal material dry friction damping mechanism testing, and in particular relates to an experimental testing device and method for vibration contact characteristics of a gas turbine blade damper system. Background technique [0002] In the field of turbomachinery, the use of dry friction device to dissipate the kinetic energy of the blade can achieve the purpose of reducing the vibration amplitude of the blade and maintaining the safe service of the blade. For example, friction dampers are typically placed on the bottom of gas turbine compressor and turbine blades and are held in contact with the root platform of each blade by centrifugal force. If the friction damper is well designed, the vibration of the blade will cause relative motion between the lower part of the blade root platform and the friction damper, which will generate frictional damping force in the contact and partially dissipate the vibrati...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01M15/14
CPCG01M13/00G01M15/14Y02T90/00
Inventor 谢永慧刘铸锋朱光亚张荻
Owner XI AN JIAOTONG UNIV
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