Rotor blade multi-modal vibration excitation device and excitation method thereof

A vibration excitation device and technology of rotor blades, which are applied in measuring devices, vibration testing, and testing of machine/structural components, etc., can solve the problems that blades are difficult to generate multi-mode vibration and high-order modal vibration, and the size of blades is small

Active Publication Date: 2019-07-30
XI AN JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the singleness of the test bench environment and the small size of the blade make it diffic...

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  • Rotor blade multi-modal vibration excitation device and excitation method thereof
  • Rotor blade multi-modal vibration excitation device and excitation method thereof
  • Rotor blade multi-modal vibration excitation device and excitation method thereof

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Embodiment Construction

[0070] The following will refer to the attached figure 1 A specific embodiment of the present invention is described in more detail to FIG. 7(c). Although specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0071] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that they may use different terms to refer to the same component. The specification and claims do not use differences in nouns as a way of distinguishing components, but use differences in functions of components as a criterion for distinguishing. "Includes" or "comprises" mentioned througho...

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Abstract

The invention discloses a rotor blade multi-modal vibration excitation device and an excitation method thereof. The rotor blade multi-modal vibration excitation device is characterized in that a motoris used for driving a main shaft to rotate through a shaft coupler; the main shaft is connected with an integral blade disk through a spline; gas sprayed from an air pump is conveyed to excitation nozzles through a shunting valve to realize pneumatic excitation of the integral blade disk; a processing unit is connected with a rotation speed sensor and a blade end timing sensor; and the processingunit generates the vibration information of the rotor blade according to a recorded rotation speed time base signal and a blade arrival time signal. The excitation nozzles of the device are uniformlydistributed, so that multi-order vibration modal or certain high-order single-modal vibration can be excited according to the test demand. The rotor blade multi-modal vibration excitation device cansolve the problem that high-order modal vibration and multi-modal vibration are difficult to generate for the blade, and has important significance for the building of a non-contact measurement bladeend timing system of a rotor blade.

Description

technical field [0001] The invention relates to the technical field of vibration testing of rotating machine rotor blades, in particular to a multi-mode vibration excitation device for rotor blades and an excitation method thereof. Background technique [0002] Rotor blades are important components in aero-engines. The harsh environment of the aero-engine is easy to cause the blades to vibrate. Due to the phenomenon of engine stall and surge, the actual situation of blade vibration is very complicated. Every year, airlines invest huge sums of money in engine maintenance and monitoring. In order to reduce the operation and maintenance cost of aero-engines while ensuring flight safety, condition-based maintenance is the goal pursued by airlines. In order to ensure the safety of blades during work, real-time monitoring must be adopted to avoid blade failures in a timely and effective manner. [0003] As a non-contact measurement technology, blade tip timing technology plays ...

Claims

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Application Information

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IPC IPC(8): G01M7/06
CPCG01M7/022G01M7/025G01M7/06
Inventor 乔百杰许敬晖陈雪峰刘军江李浩琪田绍华
Owner XI AN JIAOTONG UNIV
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